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-<H1> CUPS Software Programmers Manual</H1></A><BR>
-CUPS-SPM-1.1.7<BR>
-Easy Software Products<BR>
-Copyright 1997-2001, All Rights Reserved<BR>
-</CENTER>
-<HR>
-<H1 ALIGN="CENTER"><A NAME="CONTENTS">Table of Contents</A></H1>
-<BR>
-<BR><B><A HREF="#1">Preface</A></B>
-<UL>
-<LI><A HREF="#1_1">System Overview</A></LI>
-<LI><A HREF="#1_2">Document Overview</A></LI>
-<LI><A HREF="#1_3">Notation Conventions</A></LI>
-<LI><A HREF="#1_4">Abbreviations</A></LI>
-<LI><A HREF="#1_5">Other References</A></LI>
-</UL>
-<B><A HREF="#OVERVIEW">1 - Printing System Overview</A></B>
-<UL>
-<LI><A HREF="#2_1">The Printing Problem</A></LI>
-<LI><A HREF="#2_2">The Technology</A></LI>
-<LI><A HREF="#2_3">Jobs</A></LI>
-<LI><A HREF="#2_4">Classes</A></LI>
-<LI><A HREF="#2_5">Filters</A></LI>
-<LI><A HREF="#2_6">Backends</A></LI>
-<LI><A HREF="#2_7">Printer Drivers</A></LI>
-<LI><A HREF="#2_8">Networking</A></LI>
-</UL>
-<B><A HREF="#CUPS_API">2 - The CUPS API</A></B>
-<UL>
-<LI><A HREF="#3_1">The CUPS API Library</A></LI>
-<UL>
-<LI><A HREF="#3_1_1">Detecting the CUPS API Library in GNU Autoconf</A></LI>
-</UL>
-<LI><A HREF="#3_2">Printing Services</A></LI>
-<UL>
-<LI><A HREF="#3_2_1">Include Files</A></LI>
-<LI><A HREF="#3_2_2">Printing a File</A></LI>
-<LI><A HREF="#3_2_3">Printing Multiple Files</A></LI>
-<LI><A HREF="#3_2_4">Cancelling Jobs</A></LI>
-<LI><A HREF="#3_2_5">Getting the Available Printers and Classes</A></LI>
-<LI><A HREF="#3_2_6">Printing with Options</A></LI>
-<LI><A HREF="#3_2_7">Setting Printer Options</A></LI>
-<LI><A HREF="#3_2_8">Getting Errors</A></LI>
-<LI><A HREF="#3_2_9">Passwords and Authentication</A></LI>
-</UL>
-<LI><A HREF="#3_3">PPD Services</A></LI>
-<UL>
-<LI><A HREF="#3_3_1">Include Files</A></LI>
-<LI><A HREF="#3_3_2">Getting a PPD File for a Printer</A></LI>
-<LI><A HREF="#3_3_3">Loading a PPD File</A></LI>
-<LI><A HREF="#3_3_4">Freeing PPD File Information</A></LI>
-<LI><A HREF="#3_3_5">The PPD File Structure</A></LI>
-<LI><A HREF="#3_3_6">Marking Options</A></LI>
-<LI><A HREF="#3_3_7">Checking for Conflicts</A></LI>
-</UL>
-</UL>
-<B><A HREF="#WRITING_FILTERS">3 - Writing Filters</A></B>
-<UL>
-<LI><A HREF="#4_1">Overview</A></LI>
-<UL>
-<LI><A HREF="#4_1_1">Security Considerations</A></LI>
-<LI><A HREF="#4_1_2">Users and Groups</A></LI>
-<LI><A HREF="#4_1_3">Temporary Files</A></LI>
-<LI><A HREF="#4_1_4">Sending Messages to the User</A></LI>
-<LI><A HREF="#4_1_5">Page Accounting</A></LI>
-<LI><A HREF="#4_1_6">Command-Line Arguments</A></LI>
-<LI><A HREF="#4_1_7">Copy Generation</A></LI>
-<LI><A HREF="#4_1_8">Environment Variables</A></LI>
-</UL>
-<LI><A HREF="#4_2">Dissecting the HP-GL/2 Filter</A></LI>
-<UL>
-<LI><A HREF="#4_2_1">Initializing the Filter</A></LI>
-</UL>
-<LI><A HREF="#4_3">PostScript Output</A></LI>
-</UL>
-<B><A HREF="#WRITING_DRIVERS">4 - Writing Printer Drivers</A></B>
-<UL>
-<LI><A HREF="#5_1">Overview</A></LI>
-<UL>
-<LI><A HREF="#5_1_1">CUPS Raster Data</A></LI>
-<LI><A HREF="#5_1_2">Page Accounting</A></LI>
-<LI><A HREF="#5_1_3">Color Management</A></LI>
-<LI><A HREF="#5_1_4">Device and Bitmap Variables</A></LI>
-</UL>
-<LI><A HREF="#5_2">Dissecting the HP-PCL Driver</A></LI>
-<UL>
-<LI><A HREF="#5_2_1">PPD Files</A></LI>
-<LI><A HREF="#5_2_2">Reading Raster Data</A></LI>
-</UL>
-</UL>
-<B><A HREF="#WRITING_BACKENDS">5 - Writing Backends</A></B>
-<UL>
-<LI><A HREF="#6_1">Overview</A></LI>
-<UL>
-<LI><A HREF="#6_1_1">Security Considerations</A></LI>
-<LI><A HREF="#6_1_2">Command-Line Arguments</A></LI>
-<LI><A HREF="#6_1_3">Copy Generation</A></LI>
-<LI><A HREF="#6_1_4">Page Accounting</A></LI>
-<LI><A HREF="#6_1_5">Exclusive Access</A></LI>
-<LI><A HREF="#6_1_6">Retries</A></LI>
-</UL>
-<LI><A HREF="#6_2">Dissecting the Serial Port Backend</A></LI>
-<UL>
-<LI><A HREF="#6_2_1">Supporting Device Discovery</A></LI>
-<LI><A HREF="#6_2_2">Opening the Serial Port</A></LI>
-<LI><A HREF="#6_2_3">Writing Data to the Port</A></LI>
-<LI><A HREF="#6_2_4">Finishing Up</A></LI>
-</UL>
-</UL>
-<B><A HREF="#LICENSE">A - Software License Agreement</A></B>
-<UL>
-<LI><A HREF="#7_1">Common UNIX Printing System License Agreement</A></LI>
-<UL>
-<LI><A HREF="#7_1_1">Introduction</A></LI>
-<LI><A HREF="#7_1_2">Trademarks</A></LI>
-<LI><A HREF="#7_1_3">Binary Distribution Rights</A></LI>
-<LI><A HREF="#7_1_4">Support</A></LI>
-</UL>
-<LI><A HREF="#7_2">GNU GENERAL PUBLIC LICENSE</A></LI>
-<LI><A HREF="#7_3">GNU LIBRARY GENERAL PUBLIC LICENSE</A></LI>
-</UL>
-<B><A HREF="#CONSTANTS">B - Constants</A></B>
-<UL>
-<LI><A HREF="#8_1">CUPS Constants</A></LI>
-<UL>
-<LI><A HREF="#8_1_1">Version Number</A></LI>
-<LI><A HREF="#8_1_2">Printer Capabilities</A></LI>
-<LI><A HREF="#8_1_3">Encodings</A></LI>
-</UL>
-<LI><A HREF="#8_2">HTTP Constants</A></LI>
-<UL>
-<LI><A HREF="#8_2_1">Limits</A></LI>
-<LI><A HREF="#8_2_2">Status Codes</A></LI>
-<LI><A HREF="#8_2_3">Fields</A></LI>
-</UL>
-<LI><A HREF="#8_3">IPP Constants</A></LI>
-<UL>
-<LI><A HREF="#8_3_1">Limits</A></LI>
-<LI><A HREF="#8_3_2">Tags</A></LI>
-<LI><A HREF="#8_3_3">Resolution Units</A></LI>
-<LI><A HREF="#8_3_4">Finishings</A></LI>
-<LI><A HREF="#8_3_5">Orientations</A></LI>
-<LI><A HREF="#8_3_6">Qualities</A></LI>
-<LI><A HREF="#8_3_7">Job States</A></LI>
-<LI><A HREF="#8_3_8">Printer States</A></LI>
-<LI><A HREF="#8_3_9">Operations</A></LI>
-<LI><A HREF="#8_3_10">Status Codes</A></LI>
-</UL>
-<LI><A HREF="#8_4">PPD Constants</A></LI>
-<UL>
-<LI><A HREF="#8_4_1">PPD Format Version</A></LI>
-<LI><A HREF="#8_4_2">PPD User-Interface Types</A></LI>
-<LI><A HREF="#8_4_3">PPD Sections</A></LI>
-<LI><A HREF="#8_4_4">PPD Colorspaces</A></LI>
-</UL>
-<LI><A HREF="#8_5">Raster Constants</A></LI>
-<UL>
-<LI><A HREF="#8_5_1">Raster Sync Words</A></LI>
-<LI><A HREF="#8_5_2">Raster Stream Modes</A></LI>
-<LI><A HREF="#8_5_3">Raster Boolean Constants</A></LI>
-<LI><A HREF="#8_5_4">Raster Jog Values</A></LI>
-<LI><A HREF="#8_5_5">Raster Orientation Values</A></LI>
-<LI><A HREF="#8_5_6">Raster CutMedia Values</A></LI>
-<LI><A HREF="#8_5_7">Raster AdvanceMedia Values</A></LI>
-<LI><A HREF="#8_5_8">Raster LeadingEdge Values</A></LI>
-<LI><A HREF="#8_5_9">Raster Color Order Values</A></LI>
-<LI><A HREF="#8_5_10">Raster Colorspace Values</A></LI>
-</UL>
-</UL>
-<B><A HREF="#STRUCTURES">C - Structures</A></B>
-<UL>
-<LI><A HREF="#9_1">Raster Structures</A></LI>
-<UL>
-<LI><A HREF="#9_1_1">Raster Page Header</A></LI>
-</UL>
-</UL>
-<B><A HREF="#10">D - Functions</A></B>
-<UL>
-<LI><A HREF="#cupsAddOption">cupsAddOption()</A></LI>
-<UL>
-<LI><A HREF="#10_1_1">Usage</A></LI>
-<LI><A HREF="#10_1_2">Arguments</A></LI>
-<LI><A HREF="#10_1_3">Returns</A></LI>
-<LI><A HREF="#10_1_4">Description</A></LI>
-<LI><A HREF="#10_1_5">Example</A></LI>
-<LI><A HREF="#10_1_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsCancelJob">cupsCancelJob()</A></LI>
-<UL>
-<LI><A HREF="#10_2_1">Usage</A></LI>
-<LI><A HREF="#10_2_2">Arguments</A></LI>
-<LI><A HREF="#10_2_3">Returns</A></LI>
-<LI><A HREF="#10_2_4">Description</A></LI>
-<LI><A HREF="#10_2_5">Example</A></LI>
-<LI><A HREF="#10_2_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsDoFileRequest">cupsDoFileRequest()</A></LI>
-<UL>
-<LI><A HREF="#10_3_1">Usage</A></LI>
-<LI><A HREF="#10_3_2">Arguments</A></LI>
-<LI><A HREF="#10_3_3">Returns</A></LI>
-<LI><A HREF="#10_3_4">Description</A></LI>
-<LI><A HREF="#10_3_5">Example</A></LI>
-<LI><A HREF="#10_3_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsDoRequest">cupsDoRequest()</A></LI>
-<UL>
-<LI><A HREF="#10_4_1">Usage</A></LI>
-<LI><A HREF="#10_4_2">Arguments</A></LI>
-<LI><A HREF="#10_4_3">Returns</A></LI>
-<LI><A HREF="#10_4_4">Description</A></LI>
-<LI><A HREF="#10_4_5">Example</A></LI>
-<LI><A HREF="#10_4_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsFreeOptions">cupsFreeOptions()</A></LI>
-<UL>
-<LI><A HREF="#10_5_1">Usage</A></LI>
-<LI><A HREF="#10_5_2">Arguments</A></LI>
-<LI><A HREF="#10_5_3">Description</A></LI>
-<LI><A HREF="#10_5_4">Example</A></LI>
-<LI><A HREF="#10_5_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsGetClasses">cupsGetClasses()</A></LI>
-<UL>
-<LI><A HREF="#10_6_1">Usage</A></LI>
-<LI><A HREF="#10_6_2">Arguments</A></LI>
-<LI><A HREF="#10_6_3">Returns</A></LI>
-<LI><A HREF="#10_6_4">Description</A></LI>
-<LI><A HREF="#10_6_5">Example</A></LI>
-<LI><A HREF="#10_6_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsGetDefault">cupsGetDefault()</A></LI>
-<UL>
-<LI><A HREF="#10_7_1">Usage</A></LI>
-<LI><A HREF="#10_7_2">Returns</A></LI>
-<LI><A HREF="#10_7_3">Description</A></LI>
-<LI><A HREF="#10_7_4">Example</A></LI>
-<LI><A HREF="#10_7_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsGetOption">cupsGetOption()</A></LI>
-<UL>
-<LI><A HREF="#10_8_1">Usage</A></LI>
-<LI><A HREF="#10_8_2">Arguments</A></LI>
-<LI><A HREF="#10_8_3">Returns</A></LI>
-<LI><A HREF="#10_8_4">Description</A></LI>
-<LI><A HREF="#10_8_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsGetPassword">cupsGetPassword()</A></LI>
-<UL>
-<LI><A HREF="#10_9_1">Usage</A></LI>
-<LI><A HREF="#10_9_2">Arguments</A></LI>
-<LI><A HREF="#10_9_3">Returns</A></LI>
-<LI><A HREF="#10_9_4">Description</A></LI>
-<LI><A HREF="#10_9_5">Example</A></LI>
-<LI><A HREF="#10_9_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsGetPPD">cupsGetPPD()</A></LI>
-<UL>
-<LI><A HREF="#10_10_1">Usage</A></LI>
-<LI><A HREF="#10_10_2">Arguments</A></LI>
-<LI><A HREF="#10_10_3">Returns</A></LI>
-<LI><A HREF="#10_10_4">Description</A></LI>
-<LI><A HREF="#10_10_5">Example</A></LI>
-</UL>
-<LI><A HREF="#cupsGetPrinters">cupsGetPrinters()</A></LI>
-<UL>
-<LI><A HREF="#10_11_1">Usage</A></LI>
-<LI><A HREF="#10_11_2">Arguments</A></LI>
-<LI><A HREF="#10_11_3">Returns</A></LI>
-<LI><A HREF="#10_11_4">Description</A></LI>
-<LI><A HREF="#10_11_5">Example</A></LI>
-<LI><A HREF="#10_11_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsLangDefault">cupsLangDefault()</A></LI>
-<UL>
-<LI><A HREF="#10_12_1">Usage</A></LI>
-<LI><A HREF="#10_12_2">Returns</A></LI>
-<LI><A HREF="#10_12_3">Description</A></LI>
-<LI><A HREF="#10_12_4">Example</A></LI>
-<LI><A HREF="#10_12_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsLangEncoding">cupsLangEncoding()</A></LI>
-<UL>
-<LI><A HREF="#10_13_1">Usage</A></LI>
-<LI><A HREF="#10_13_2">Arguments</A></LI>
-<LI><A HREF="#10_13_3">Returns</A></LI>
-<LI><A HREF="#10_13_4">Description</A></LI>
-<LI><A HREF="#10_13_5">Example</A></LI>
-<LI><A HREF="#10_13_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsLangFlush">cupsLangFlush()</A></LI>
-<UL>
-<LI><A HREF="#10_14_1">Usage</A></LI>
-<LI><A HREF="#10_14_2">Description</A></LI>
-<LI><A HREF="#10_14_3">Example</A></LI>
-<LI><A HREF="#10_14_4">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsLangFree">cupsLangFree()</A></LI>
-<UL>
-<LI><A HREF="#10_15_1">Usage</A></LI>
-<LI><A HREF="#10_15_2">Arguments</A></LI>
-<LI><A HREF="#10_15_3">Description</A></LI>
-<LI><A HREF="#10_15_4">Example</A></LI>
-<LI><A HREF="#10_15_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsLangGet">cupsLangGet()</A></LI>
-<UL>
-<LI><A HREF="#10_16_1">Usage</A></LI>
-<LI><A HREF="#10_16_2">Arguments</A></LI>
-<LI><A HREF="#10_16_3">Returns</A></LI>
-<LI><A HREF="#10_16_4">Description</A></LI>
-<LI><A HREF="#10_16_5">Example</A></LI>
-<LI><A HREF="#10_16_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsLangString">cupsLangString()</A></LI>
-<UL>
-<LI><A HREF="#10_17_1">Usage</A></LI>
-<LI><A HREF="#10_17_2">Arguments</A></LI>
-<LI><A HREF="#10_17_3">Returns</A></LI>
-<LI><A HREF="#10_17_4">Description</A></LI>
-<LI><A HREF="#10_17_5">Example</A></LI>
-<LI><A HREF="#10_17_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsLastError">cupsLastError()</A></LI>
-<UL>
-<LI><A HREF="#10_18_1">Usage</A></LI>
-<LI><A HREF="#10_18_2">Returns</A></LI>
-<LI><A HREF="#10_18_3">Description</A></LI>
-<LI><A HREF="#10_18_4">Example</A></LI>
-<LI><A HREF="#10_18_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsMarkOptions">cupsMarkOptions()</A></LI>
-<UL>
-<LI><A HREF="#10_19_1">Usage</A></LI>
-<LI><A HREF="#10_19_2">Arguments</A></LI>
-<LI><A HREF="#10_19_3">Returns</A></LI>
-<LI><A HREF="#10_19_4">Description</A></LI>
-<LI><A HREF="#10_19_5">Example</A></LI>
-<LI><A HREF="#10_19_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsParseOptions">cupsParseOptions()</A></LI>
-<UL>
-<LI><A HREF="#10_20_1">Usage</A></LI>
-<LI><A HREF="#10_20_2">Arguments</A></LI>
-<LI><A HREF="#10_20_3">Returns</A></LI>
-<LI><A HREF="#10_20_4">Description</A></LI>
-<LI><A HREF="#10_20_5">Example</A></LI>
-<LI><A HREF="#10_20_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsPrintFile">cupsPrintFile()</A></LI>
-<UL>
-<LI><A HREF="#10_21_1">Usage</A></LI>
-<LI><A HREF="#10_21_2">Arguments</A></LI>
-<LI><A HREF="#10_21_3">Returns</A></LI>
-<LI><A HREF="#10_21_4">Description</A></LI>
-<LI><A HREF="#10_21_5">Example</A></LI>
-<LI><A HREF="#10_21_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsPrintFiles">cupsPrintFiles()</A></LI>
-<UL>
-<LI><A HREF="#10_22_1">Usage</A></LI>
-<LI><A HREF="#10_22_2">Arguments</A></LI>
-<LI><A HREF="#10_22_3">Returns</A></LI>
-<LI><A HREF="#10_22_4">Description</A></LI>
-<LI><A HREF="#10_22_5">Example</A></LI>
-<LI><A HREF="#10_22_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsRasterClose">cupsRasterClose()</A></LI>
-<UL>
-<LI><A HREF="#10_23_1">Usage</A></LI>
-<LI><A HREF="#10_23_2">Arguments</A></LI>
-<LI><A HREF="#10_23_3">Description</A></LI>
-<LI><A HREF="#10_23_4">Example</A></LI>
-<LI><A HREF="#10_23_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsRasterOpen">cupsRasterOpen()</A></LI>
-<UL>
-<LI><A HREF="#10_24_1">Usage</A></LI>
-<LI><A HREF="#10_24_2">Arguments</A></LI>
-<LI><A HREF="#10_24_3">Returns</A></LI>
-<LI><A HREF="#10_24_4">Description</A></LI>
-<LI><A HREF="#10_24_5">Example</A></LI>
-<LI><A HREF="#10_24_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsRasterReadHeader">cupsRasterReadHeader()</A></LI>
-<UL>
-<LI><A HREF="#10_25_1">Usage</A></LI>
-<LI><A HREF="#10_25_2">Arguments</A></LI>
-<LI><A HREF="#10_25_3">Returns</A></LI>
-<LI><A HREF="#10_25_4">Description</A></LI>
-<LI><A HREF="#10_25_5">Example</A></LI>
-<LI><A HREF="#10_25_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsRasterReadPixels">cupsRasterReadPixels()</A></LI>
-<UL>
-<LI><A HREF="#10_26_1">Usage</A></LI>
-<LI><A HREF="#10_26_2">Arguments</A></LI>
-<LI><A HREF="#10_26_3">Returns</A></LI>
-<LI><A HREF="#10_26_4">Description</A></LI>
-<LI><A HREF="#10_26_5">Example</A></LI>
-<LI><A HREF="#10_26_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsRasterWriteHeader">cupsRasterWriteHeader()</A></LI>
-<UL>
-<LI><A HREF="#10_27_1">Usage</A></LI>
-<LI><A HREF="#10_27_2">Arguments</A></LI>
-<LI><A HREF="#10_27_3">Returns</A></LI>
-<LI><A HREF="#10_27_4">Description</A></LI>
-<LI><A HREF="#10_27_5">Example</A></LI>
-<LI><A HREF="#10_27_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsRasterWritePixels">cupsRasterWritePixels()</A></LI>
-<UL>
-<LI><A HREF="#10_28_1">Usage</A></LI>
-<LI><A HREF="#10_28_2">Arguments</A></LI>
-<LI><A HREF="#10_28_3">Returns</A></LI>
-<LI><A HREF="#10_28_4">Description</A></LI>
-<LI><A HREF="#10_28_5">Example</A></LI>
-<LI><A HREF="#10_28_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsServer">cupsServer()</A></LI>
-<UL>
-<LI><A HREF="#10_29_1">Usage</A></LI>
-<LI><A HREF="#10_29_2">Returns</A></LI>
-<LI><A HREF="#10_29_3">Description</A></LI>
-<LI><A HREF="#10_29_4">Example</A></LI>
-<LI><A HREF="#10_29_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsSetPasswordCB">cupsSetPasswordCB()</A></LI>
-<UL>
-<LI><A HREF="#10_30_1">Usage</A></LI>
-<LI><A HREF="#10_30_2">Arguments</A></LI>
-<LI><A HREF="#10_30_3">Description</A></LI>
-<LI><A HREF="#10_30_4">Example</A></LI>
-<LI><A HREF="#10_30_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsSetServer">cupsSetServer()</A></LI>
-<UL>
-<LI><A HREF="#10_31_1">Usage</A></LI>
-<LI><A HREF="#10_31_2">Arguments</A></LI>
-<LI><A HREF="#10_31_3">Description</A></LI>
-<LI><A HREF="#10_31_4">Example</A></LI>
-<LI><A HREF="#10_31_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsSetUser">cupsSetUser()</A></LI>
-<UL>
-<LI><A HREF="#10_32_1">Usage</A></LI>
-<LI><A HREF="#10_32_2">Arguments</A></LI>
-<LI><A HREF="#10_32_3">Description</A></LI>
-<LI><A HREF="#10_32_4">Example</A></LI>
-<LI><A HREF="#10_32_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#cupsTempFile">cupsTempFile()</A></LI>
-<UL>
-<LI><A HREF="#10_33_1">Usage</A></LI>
-<LI><A HREF="#10_33_2">Arguments</A></LI>
-<LI><A HREF="#10_33_3">Returns</A></LI>
-<LI><A HREF="#10_33_4">Description</A></LI>
-<LI><A HREF="#10_33_5">Example</A></LI>
-</UL>
-<LI><A HREF="#cupsUser">cupsUser()</A></LI>
-<UL>
-<LI><A HREF="#10_34_1">Usage</A></LI>
-<LI><A HREF="#10_34_2">Returns</A></LI>
-<LI><A HREF="#10_34_3">Description</A></LI>
-<LI><A HREF="#10_34_4">Example</A></LI>
-<LI><A HREF="#10_34_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpBlocking">httpBlocking()</A></LI>
-<UL>
-<LI><A HREF="#10_35_1">Usage</A></LI>
-<LI><A HREF="#10_35_2">Arguments</A></LI>
-<LI><A HREF="#10_35_3">Description</A></LI>
-<LI><A HREF="#10_35_4">Example</A></LI>
-<LI><A HREF="#10_35_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpCheck">httpCheck()</A></LI>
-<UL>
-<LI><A HREF="#10_36_1">Usage</A></LI>
-<LI><A HREF="#10_36_2">Arguments</A></LI>
-<LI><A HREF="#10_36_3">Returns</A></LI>
-<LI><A HREF="#10_36_4">Description</A></LI>
-<LI><A HREF="#10_36_5">Example</A></LI>
-<LI><A HREF="#10_36_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpClearFields">httpClearFields()</A></LI>
-<UL>
-<LI><A HREF="#10_37_1">Usage</A></LI>
-<LI><A HREF="#10_37_2">Arguments</A></LI>
-<LI><A HREF="#10_37_3">Description</A></LI>
-<LI><A HREF="#10_37_4">Example</A></LI>
-<LI><A HREF="#10_37_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpClose">httpClose()</A></LI>
-<UL>
-<LI><A HREF="#10_38_1">Usage</A></LI>
-<LI><A HREF="#10_38_2">Arguments</A></LI>
-<LI><A HREF="#10_38_3">Description</A></LI>
-<LI><A HREF="#10_38_4">Example</A></LI>
-<LI><A HREF="#10_38_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpConnect">httpConnect()</A></LI>
-<UL>
-<LI><A HREF="#10_39_1">Usage</A></LI>
-<LI><A HREF="#10_39_2">Arguments</A></LI>
-<LI><A HREF="#10_39_3">Returns</A></LI>
-<LI><A HREF="#10_39_4">Description</A></LI>
-<LI><A HREF="#10_39_5">Example</A></LI>
-<LI><A HREF="#10_39_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpDecode64">httpDecode64()</A></LI>
-<UL>
-<LI><A HREF="#10_40_1">Usage</A></LI>
-<LI><A HREF="#10_40_2">Arguments</A></LI>
-<LI><A HREF="#10_40_3">Returns</A></LI>
-<LI><A HREF="#10_40_4">Description</A></LI>
-<LI><A HREF="#10_40_5">Example</A></LI>
-<LI><A HREF="#10_40_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpDelete">httpDelete()</A></LI>
-<UL>
-<LI><A HREF="#10_41_1">Usage</A></LI>
-<LI><A HREF="#10_41_2">Arguments</A></LI>
-<LI><A HREF="#10_41_3">Returns</A></LI>
-<LI><A HREF="#10_41_4">Description</A></LI>
-<LI><A HREF="#10_41_5">Example</A></LI>
-<LI><A HREF="#10_41_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpEncode64">httpEncode64()</A></LI>
-<UL>
-<LI><A HREF="#10_42_1">Usage</A></LI>
-<LI><A HREF="#10_42_2">Arguments</A></LI>
-<LI><A HREF="#10_42_3">Returns</A></LI>
-<LI><A HREF="#10_42_4">Description</A></LI>
-<LI><A HREF="#10_42_5">Example</A></LI>
-<LI><A HREF="#10_42_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpError">httpError()</A></LI>
-<UL>
-<LI><A HREF="#10_43_1">Usage</A></LI>
-<LI><A HREF="#10_43_2">Arguments</A></LI>
-<LI><A HREF="#10_43_3">Returns</A></LI>
-<LI><A HREF="#10_43_4">Description</A></LI>
-<LI><A HREF="#10_43_5">Example</A></LI>
-<LI><A HREF="#10_43_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpFlush">httpFlush()</A></LI>
-<UL>
-<LI><A HREF="#10_44_1">Usage</A></LI>
-<LI><A HREF="#10_44_2">Arguments</A></LI>
-<LI><A HREF="#10_44_3">Description</A></LI>
-<LI><A HREF="#10_44_4">Example</A></LI>
-<LI><A HREF="#10_44_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpGet">httpGet()</A></LI>
-<UL>
-<LI><A HREF="#10_45_1">Usage</A></LI>
-<LI><A HREF="#10_45_2">Arguments</A></LI>
-<LI><A HREF="#10_45_3">Returns</A></LI>
-<LI><A HREF="#10_45_4">Description</A></LI>
-<LI><A HREF="#10_45_5">Example</A></LI>
-<LI><A HREF="#10_45_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpGets">httpGets()</A></LI>
-<UL>
-<LI><A HREF="#10_46_1">Usage</A></LI>
-<LI><A HREF="#10_46_2">Arguments</A></LI>
-<LI><A HREF="#10_46_3">Returns</A></LI>
-<LI><A HREF="#10_46_4">Description</A></LI>
-<LI><A HREF="#10_46_5">Example</A></LI>
-<LI><A HREF="#10_46_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpGetDateString">httpGetDateString()</A></LI>
-<UL>
-<LI><A HREF="#10_47_1">Usage</A></LI>
-<LI><A HREF="#10_47_2">Arguments</A></LI>
-<LI><A HREF="#10_47_3">Returns</A></LI>
-<LI><A HREF="#10_47_4">Description</A></LI>
-<LI><A HREF="#10_47_5">Example</A></LI>
-<LI><A HREF="#10_47_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpGetDateTime">httpGetDateTime()</A></LI>
-<UL>
-<LI><A HREF="#10_48_1">Usage</A></LI>
-<LI><A HREF="#10_48_2">Arguments</A></LI>
-<LI><A HREF="#10_48_3">Returns</A></LI>
-<LI><A HREF="#10_48_4">Description</A></LI>
-<LI><A HREF="#10_48_5">Example</A></LI>
-<LI><A HREF="#10_48_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpGetField">httpGetField()</A></LI>
-<UL>
-<LI><A HREF="#10_49_1">Usage</A></LI>
-<LI><A HREF="#10_49_2">Arguments</A></LI>
-<LI><A HREF="#10_49_3">Returns</A></LI>
-<LI><A HREF="#10_49_4">Description</A></LI>
-<LI><A HREF="#10_49_5">Example</A></LI>
-<LI><A HREF="#10_49_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpHead">httpHead()</A></LI>
-<UL>
-<LI><A HREF="#10_50_1">Usage</A></LI>
-<LI><A HREF="#10_50_2">Arguments</A></LI>
-<LI><A HREF="#10_50_3">Returns</A></LI>
-<LI><A HREF="#10_50_4">Description</A></LI>
-<LI><A HREF="#10_50_5">Example</A></LI>
-<LI><A HREF="#10_50_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpInitialize">httpInitialize()</A></LI>
-<UL>
-<LI><A HREF="#10_51_1">Usage</A></LI>
-<LI><A HREF="#10_51_2">Description</A></LI>
-<LI><A HREF="#10_51_3">Example</A></LI>
-<LI><A HREF="#10_51_4">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpOptions">httpOptions()</A></LI>
-<UL>
-<LI><A HREF="#10_52_1">Usage</A></LI>
-<LI><A HREF="#10_52_2">Arguments</A></LI>
-<LI><A HREF="#10_52_3">Returns</A></LI>
-<LI><A HREF="#10_52_4">Description</A></LI>
-<LI><A HREF="#10_52_5">Example</A></LI>
-<LI><A HREF="#10_52_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpPost">httpPost()</A></LI>
-<UL>
-<LI><A HREF="#10_53_1">Usage</A></LI>
-<LI><A HREF="#10_53_2">Arguments</A></LI>
-<LI><A HREF="#10_53_3">Returns</A></LI>
-<LI><A HREF="#10_53_4">Description</A></LI>
-<LI><A HREF="#10_53_5">Example</A></LI>
-<LI><A HREF="#10_53_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpPrintf">httpPrintf()</A></LI>
-<UL>
-<LI><A HREF="#10_54_1">Usage</A></LI>
-<LI><A HREF="#10_54_2">Arguments</A></LI>
-<LI><A HREF="#10_54_3">Returns</A></LI>
-<LI><A HREF="#10_54_4">Description</A></LI>
-<LI><A HREF="#10_54_5">Example</A></LI>
-<LI><A HREF="#10_54_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpPut">httpPut()</A></LI>
-<UL>
-<LI><A HREF="#10_55_1">Usage</A></LI>
-<LI><A HREF="#10_55_2">Arguments</A></LI>
-<LI><A HREF="#10_55_3">Returns</A></LI>
-<LI><A HREF="#10_55_4">Description</A></LI>
-<LI><A HREF="#10_55_5">Example</A></LI>
-<LI><A HREF="#10_55_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpRead">httpRead()</A></LI>
-<UL>
-<LI><A HREF="#10_56_1">Usage</A></LI>
-<LI><A HREF="#10_56_2">Arguments</A></LI>
-<LI><A HREF="#10_56_3">Returns</A></LI>
-<LI><A HREF="#10_56_4">Description</A></LI>
-<LI><A HREF="#10_56_5">Example</A></LI>
-<LI><A HREF="#10_56_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpReconnect">httpReconnect()</A></LI>
-<UL>
-<LI><A HREF="#10_57_1">Usage</A></LI>
-<LI><A HREF="#10_57_2">Arguments</A></LI>
-<LI><A HREF="#10_57_3">Returns</A></LI>
-<LI><A HREF="#10_57_4">Description</A></LI>
-<LI><A HREF="#10_57_5">Example</A></LI>
-<LI><A HREF="#10_57_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpSeparate">httpSeparate()</A></LI>
-<UL>
-<LI><A HREF="#10_58_1">Usage</A></LI>
-<LI><A HREF="#10_58_2">Arguments</A></LI>
-<LI><A HREF="#10_58_3">Description</A></LI>
-<LI><A HREF="#10_58_4">Example</A></LI>
-<LI><A HREF="#10_58_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpSetField">httpSetField()</A></LI>
-<UL>
-<LI><A HREF="#10_59_1">Usage</A></LI>
-<LI><A HREF="#10_59_2">Arguments</A></LI>
-<LI><A HREF="#10_59_3">Description</A></LI>
-<LI><A HREF="#10_59_4">Example</A></LI>
-<LI><A HREF="#10_59_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpTrace">httpTrace()</A></LI>
-<UL>
-<LI><A HREF="#10_60_1">Usage</A></LI>
-<LI><A HREF="#10_60_2">Arguments</A></LI>
-<LI><A HREF="#10_60_3">Returns</A></LI>
-<LI><A HREF="#10_60_4">Description</A></LI>
-<LI><A HREF="#10_60_5">Example</A></LI>
-<LI><A HREF="#10_60_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpUpdate">httpUpdate()</A></LI>
-<UL>
-<LI><A HREF="#10_61_1">Usage</A></LI>
-<LI><A HREF="#10_61_2">Arguments</A></LI>
-<LI><A HREF="#10_61_3">Returns</A></LI>
-<LI><A HREF="#10_61_4">Description</A></LI>
-<LI><A HREF="#10_61_5">Example</A></LI>
-<LI><A HREF="#10_61_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#httpWrite">httpWrite()</A></LI>
-<UL>
-<LI><A HREF="#10_62_1">Usage</A></LI>
-<LI><A HREF="#10_62_2">Arguments</A></LI>
-<LI><A HREF="#10_62_3">Returns</A></LI>
-<LI><A HREF="#10_62_4">Description</A></LI>
-<LI><A HREF="#10_62_5">Example</A></LI>
-<LI><A HREF="#10_62_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddBoolean">ippAddBoolean()</A></LI>
-<UL>
-<LI><A HREF="#10_63_1">Usage</A></LI>
-<LI><A HREF="#10_63_2">Arguments</A></LI>
-<LI><A HREF="#10_63_3">Returns</A></LI>
-<LI><A HREF="#10_63_4">Description</A></LI>
-<LI><A HREF="#10_63_5">Example</A></LI>
-<LI><A HREF="#10_63_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddBooleans">ippAddBooleans()</A></LI>
-<UL>
-<LI><A HREF="#10_64_1">Usage</A></LI>
-<LI><A HREF="#10_64_2">Arguments</A></LI>
-<LI><A HREF="#10_64_3">Returns</A></LI>
-<LI><A HREF="#10_64_4">Description</A></LI>
-<LI><A HREF="#10_64_5">Example</A></LI>
-<LI><A HREF="#10_64_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddDate">ippAddDate()</A></LI>
-<UL>
-<LI><A HREF="#10_65_1">Usage</A></LI>
-<LI><A HREF="#10_65_2">Arguments</A></LI>
-<LI><A HREF="#10_65_3">Returns</A></LI>
-<LI><A HREF="#10_65_4">Description</A></LI>
-<LI><A HREF="#10_65_5">Example</A></LI>
-<LI><A HREF="#10_65_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddInteger">ippAddInteger()</A></LI>
-<UL>
-<LI><A HREF="#10_66_1">Usage</A></LI>
-<LI><A HREF="#10_66_2">Arguments</A></LI>
-<LI><A HREF="#10_66_3">Returns</A></LI>
-<LI><A HREF="#10_66_4">Description</A></LI>
-<LI><A HREF="#10_66_5">Example</A></LI>
-<LI><A HREF="#10_66_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddIntegers">ippAddIntegers()</A></LI>
-<UL>
-<LI><A HREF="#10_67_1">Usage</A></LI>
-<LI><A HREF="#10_67_2">Arguments</A></LI>
-<LI><A HREF="#10_67_3">Returns</A></LI>
-<LI><A HREF="#10_67_4">Description</A></LI>
-<LI><A HREF="#10_67_5">Example</A></LI>
-<LI><A HREF="#10_67_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddRange">ippAddRange()</A></LI>
-<UL>
-<LI><A HREF="#10_68_1">Usage</A></LI>
-<LI><A HREF="#10_68_2">Arguments</A></LI>
-<LI><A HREF="#10_68_3">Returns</A></LI>
-<LI><A HREF="#10_68_4">Description</A></LI>
-<LI><A HREF="#10_68_5">Example</A></LI>
-<LI><A HREF="#10_68_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddRanges">ippAddRanges()</A></LI>
-<UL>
-<LI><A HREF="#10_69_1">Usage</A></LI>
-<LI><A HREF="#10_69_2">Arguments</A></LI>
-<LI><A HREF="#10_69_3">Returns</A></LI>
-<LI><A HREF="#10_69_4">Description</A></LI>
-<LI><A HREF="#10_69_5">Example</A></LI>
-<LI><A HREF="#10_69_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddResolution">ippAddResolution()</A></LI>
-<UL>
-<LI><A HREF="#10_70_1">Usage</A></LI>
-<LI><A HREF="#10_70_2">Arguments</A></LI>
-<LI><A HREF="#10_70_3">Returns</A></LI>
-<LI><A HREF="#10_70_4">Description</A></LI>
-<LI><A HREF="#10_70_5">Example</A></LI>
-<LI><A HREF="#10_70_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddResolutions">ippAddResolutions()</A></LI>
-<UL>
-<LI><A HREF="#10_71_1">Usage</A></LI>
-<LI><A HREF="#10_71_2">Arguments</A></LI>
-<LI><A HREF="#10_71_3">Returns</A></LI>
-<LI><A HREF="#10_71_4">Description</A></LI>
-<LI><A HREF="#10_71_5">Example</A></LI>
-<LI><A HREF="#10_71_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddSeparator">ippAddSeparator()</A></LI>
-<UL>
-<LI><A HREF="#10_72_1">Usage</A></LI>
-<LI><A HREF="#10_72_2">Arguments</A></LI>
-<LI><A HREF="#10_72_3">Returns</A></LI>
-<LI><A HREF="#10_72_4">Description</A></LI>
-<LI><A HREF="#10_72_5">Example</A></LI>
-<LI><A HREF="#10_72_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddString">ippAddString()</A></LI>
-<UL>
-<LI><A HREF="#10_73_1">Usage</A></LI>
-<LI><A HREF="#10_73_2">Arguments</A></LI>
-<LI><A HREF="#10_73_3">Returns</A></LI>
-<LI><A HREF="#10_73_4">Description</A></LI>
-<LI><A HREF="#10_73_5">Example</A></LI>
-<LI><A HREF="#10_73_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippAddStrings">ippAddStrings()</A></LI>
-<UL>
-<LI><A HREF="#10_74_1">Usage</A></LI>
-<LI><A HREF="#10_74_2">Arguments</A></LI>
-<LI><A HREF="#10_74_3">Returns</A></LI>
-<LI><A HREF="#10_74_4">Description</A></LI>
-<LI><A HREF="#10_74_5">Example</A></LI>
-<LI><A HREF="#10_74_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippDateToTime">ippDateToTime()</A></LI>
-<UL>
-<LI><A HREF="#10_75_1">Usage</A></LI>
-<LI><A HREF="#10_75_2">Arguments</A></LI>
-<LI><A HREF="#10_75_3">Returns</A></LI>
-<LI><A HREF="#10_75_4">Description</A></LI>
-<LI><A HREF="#10_75_5">Example</A></LI>
-<LI><A HREF="#10_75_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippDelete">ippDelete()</A></LI>
-<UL>
-<LI><A HREF="#10_76_1">Usage</A></LI>
-<LI><A HREF="#10_76_2">Arguments</A></LI>
-<LI><A HREF="#10_76_3">Description</A></LI>
-<LI><A HREF="#10_76_4">Example</A></LI>
-<LI><A HREF="#10_76_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippFindAttribute">ippFindAttribute()</A></LI>
-<UL>
-<LI><A HREF="#10_77_1">Usage</A></LI>
-<LI><A HREF="#10_77_2">Arguments</A></LI>
-<LI><A HREF="#10_77_3">Returns</A></LI>
-<LI><A HREF="#10_77_4">Description</A></LI>
-<LI><A HREF="#10_77_5">Example</A></LI>
-<LI><A HREF="#10_77_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippLength">ippLength()</A></LI>
-<UL>
-<LI><A HREF="#10_78_1">Usage</A></LI>
-<LI><A HREF="#10_78_2">Arguments</A></LI>
-<LI><A HREF="#10_78_3">Returns</A></LI>
-<LI><A HREF="#10_78_4">Description</A></LI>
-<LI><A HREF="#10_78_5">Example</A></LI>
-<LI><A HREF="#10_78_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippNew">ippNew()</A></LI>
-<UL>
-<LI><A HREF="#10_79_1">Usage</A></LI>
-<LI><A HREF="#10_79_2">Returns</A></LI>
-<LI><A HREF="#10_79_3">Description</A></LI>
-<LI><A HREF="#10_79_4">Example</A></LI>
-<LI><A HREF="#10_79_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippPort">ippPort()</A></LI>
-<UL>
-<LI><A HREF="#10_80_1">Usage</A></LI>
-<LI><A HREF="#10_80_2">Returns</A></LI>
-<LI><A HREF="#10_80_3">Description</A></LI>
-<LI><A HREF="#10_80_4">Example</A></LI>
-<LI><A HREF="#10_80_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippRead">ippRead()</A></LI>
-<UL>
-<LI><A HREF="#10_81_1">Usage</A></LI>
-<LI><A HREF="#10_81_2">Arguments</A></LI>
-<LI><A HREF="#10_81_3">Returns</A></LI>
-<LI><A HREF="#10_81_4">Description</A></LI>
-<LI><A HREF="#10_81_5">Example</A></LI>
-<LI><A HREF="#10_81_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippSetPort">ippSetPort()</A></LI>
-<UL>
-<LI><A HREF="#10_82_1">Usage</A></LI>
-<LI><A HREF="#10_82_2">Arguments</A></LI>
-<LI><A HREF="#10_82_3">Description</A></LI>
-<LI><A HREF="#10_82_4">Example</A></LI>
-<LI><A HREF="#10_82_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippTimeToDate">ippTimeToDate()</A></LI>
-<UL>
-<LI><A HREF="#10_83_1">Usage</A></LI>
-<LI><A HREF="#10_83_2">Arguments</A></LI>
-<LI><A HREF="#10_83_3">Returns</A></LI>
-<LI><A HREF="#10_83_4">Description</A></LI>
-<LI><A HREF="#10_83_5">Example</A></LI>
-<LI><A HREF="#10_83_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ippWrite">ippWrite()</A></LI>
-<UL>
-<LI><A HREF="#10_84_1">Usage</A></LI>
-<LI><A HREF="#10_84_2">Arguments</A></LI>
-<LI><A HREF="#10_84_3">Returns</A></LI>
-<LI><A HREF="#10_84_4">Description</A></LI>
-<LI><A HREF="#10_84_5">Example</A></LI>
-<LI><A HREF="#10_84_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdClose">ppdClose()</A></LI>
-<UL>
-<LI><A HREF="#10_85_1">Usage</A></LI>
-<LI><A HREF="#10_85_2">Arguments</A></LI>
-<LI><A HREF="#10_85_3">Description</A></LI>
-<LI><A HREF="#10_85_4">Example</A></LI>
-<LI><A HREF="#10_85_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdConflicts">ppdConflicts()</A></LI>
-<UL>
-<LI><A HREF="#10_86_1">Usage</A></LI>
-<LI><A HREF="#10_86_2">Arguments</A></LI>
-<LI><A HREF="#10_86_3">Returns</A></LI>
-<LI><A HREF="#10_86_4">Description</A></LI>
-<LI><A HREF="#10_86_5">Example</A></LI>
-<LI><A HREF="#10_86_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdEmit">ppdEmit()</A></LI>
-<UL>
-<LI><A HREF="#10_87_1">Usage</A></LI>
-<LI><A HREF="#10_87_2">Arguments</A></LI>
-<LI><A HREF="#10_87_3">Returns</A></LI>
-<LI><A HREF="#10_87_4">Description</A></LI>
-<LI><A HREF="#10_87_5">Example</A></LI>
-<LI><A HREF="#10_87_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdEmitFd">ppdEmitFd()</A></LI>
-<UL>
-<LI><A HREF="#10_88_1">Usage</A></LI>
-<LI><A HREF="#10_88_2">Arguments</A></LI>
-<LI><A HREF="#10_88_3">Returns</A></LI>
-<LI><A HREF="#10_88_4">Description</A></LI>
-<LI><A HREF="#10_88_5">Example</A></LI>
-<LI><A HREF="#10_88_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdFindChoice">ppdFindChoice()</A></LI>
-<UL>
-<LI><A HREF="#10_89_1">Usage</A></LI>
-<LI><A HREF="#10_89_2">Arguments</A></LI>
-<LI><A HREF="#10_89_3">Returns</A></LI>
-<LI><A HREF="#10_89_4">Description</A></LI>
-<LI><A HREF="#10_89_5">Example</A></LI>
-<LI><A HREF="#10_89_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdFindMarkedChoice">ppdFindMarkedChoice()</A></LI>
-<UL>
-<LI><A HREF="#10_90_1">Usage</A></LI>
-<LI><A HREF="#10_90_2">Arguments</A></LI>
-<LI><A HREF="#10_90_3">Returns</A></LI>
-<LI><A HREF="#10_90_4">Description</A></LI>
-<LI><A HREF="#10_90_5">Example</A></LI>
-<LI><A HREF="#10_90_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdFindOption">ppdFindOption()</A></LI>
-<UL>
-<LI><A HREF="#10_91_1">Usage</A></LI>
-<LI><A HREF="#10_91_2">Arguments</A></LI>
-<LI><A HREF="#10_91_3">Returns</A></LI>
-<LI><A HREF="#10_91_4">Description</A></LI>
-<LI><A HREF="#10_91_5">Example</A></LI>
-<LI><A HREF="#10_91_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdIsMarked">ppdIsMarked()</A></LI>
-<UL>
-<LI><A HREF="#10_92_1">Usage</A></LI>
-<LI><A HREF="#10_92_2">Arguments</A></LI>
-<LI><A HREF="#10_92_3">Returns</A></LI>
-<LI><A HREF="#10_92_4">Description</A></LI>
-<LI><A HREF="#10_92_5">Example</A></LI>
-<LI><A HREF="#10_92_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdMarkDefaults">ppdMarkDefaults()</A></LI>
-<UL>
-<LI><A HREF="#10_93_1">Usage</A></LI>
-<LI><A HREF="#10_93_2">Arguments</A></LI>
-<LI><A HREF="#10_93_3">Description</A></LI>
-<LI><A HREF="#10_93_4">Example</A></LI>
-<LI><A HREF="#10_93_5">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdMarkOption">ppdMarkOption()</A></LI>
-<UL>
-<LI><A HREF="#10_94_1">Usage</A></LI>
-<LI><A HREF="#10_94_2">Arguments</A></LI>
-<LI><A HREF="#10_94_3">Returns</A></LI>
-<LI><A HREF="#10_94_4">Description</A></LI>
-<LI><A HREF="#10_94_5">Example</A></LI>
-<LI><A HREF="#10_94_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdOpen">ppdOpen()</A></LI>
-<UL>
-<LI><A HREF="#10_95_1">Usage</A></LI>
-<LI><A HREF="#10_95_2">Arguments</A></LI>
-<LI><A HREF="#10_95_3">Returns</A></LI>
-<LI><A HREF="#10_95_4">Description</A></LI>
-<LI><A HREF="#10_95_5">Example</A></LI>
-<LI><A HREF="#10_95_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdOpenFd">ppdOpenFd()</A></LI>
-<UL>
-<LI><A HREF="#10_96_1">Usage</A></LI>
-<LI><A HREF="#10_96_2">Arguments</A></LI>
-<LI><A HREF="#10_96_3">Returns</A></LI>
-<LI><A HREF="#10_96_4">Description</A></LI>
-<LI><A HREF="#10_96_5">Example</A></LI>
-<LI><A HREF="#10_96_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdOpenFile">ppdOpenFile()</A></LI>
-<UL>
-<LI><A HREF="#10_97_1">Usage</A></LI>
-<LI><A HREF="#10_97_2">Arguments</A></LI>
-<LI><A HREF="#10_97_3">Returns</A></LI>
-<LI><A HREF="#10_97_4">Description</A></LI>
-<LI><A HREF="#10_97_5">Example</A></LI>
-<LI><A HREF="#10_97_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdPageLength">ppdPageLength()</A></LI>
-<UL>
-<LI><A HREF="#10_98_1">Usage</A></LI>
-<LI><A HREF="#10_98_2">Arguments</A></LI>
-<LI><A HREF="#10_98_3">Returns</A></LI>
-<LI><A HREF="#10_98_4">Description</A></LI>
-<LI><A HREF="#10_98_5">Example</A></LI>
-<LI><A HREF="#10_98_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdPageSize">ppdPageSize()</A></LI>
-<UL>
-<LI><A HREF="#10_99_1">Usage</A></LI>
-<LI><A HREF="#10_99_2">Arguments</A></LI>
-<LI><A HREF="#10_99_3">Returns</A></LI>
-<LI><A HREF="#10_99_4">Description</A></LI>
-<LI><A HREF="#10_99_5">Example</A></LI>
-<LI><A HREF="#10_99_6">See Also</A></LI>
-</UL>
-<LI><A HREF="#ppdPageWidth">ppdPageWidth()</A></LI>
-<UL>
-<LI><A HREF="#10_100_1">Usage</A></LI>
-<LI><A HREF="#10_100_2">Arguments</A></LI>
-<LI><A HREF="#10_100_3">Returns</A></LI>
-<LI><A HREF="#10_100_4">Description</A></LI>
-<LI><A HREF="#10_100_5">Example</A></LI>
-<LI><A HREF="#10_100_6">See Also</A></LI>
-</UL>
-</UL>
-<HR>
-<H1 ALIGN="RIGHT"><A NAME="1">Preface</A></H1>
-<P>This software programmers manual provides software programming
-information for the Common UNIX Printing System ("CUPS") Version 1.1.7. </P>
-<H2><A NAME="1_1">System Overview</A></H2>
-<P>CUPS provides a portable printing layer for UNIX®-based operating
-systems. It has been developed by <A HREF="http://www.easysw.com">Easy
-Software Products</A> to promote a standard printing solution for all
-UNIX vendors and users. CUPS provides the System V and Berkeley
-command-line interfaces. </P>
-<P>CUPS uses the Internet Printing Protocol ("IPP") as the basis for
-managing print jobs and queues. The Line Printer Daemon ("LPD") Server
-Message Block ("SMB"), and AppSocket (a.k.a. JetDirect) protocols are
-also supported with reduced functionality. CUPS adds network printer
-browsing and PostScript Printer Description ("PPD") based printing
-options to support real-world printing under UNIX. </P>
-<P>CUPS also includes a customized version of GNU Ghostscript
-(currently based off GNU Ghostscript 5.50) and an image file RIP that
-are used to support non-PostScript printers. Sample drivers for HP and
-EPSON printers are included that use these filters. </P>
-
-<!-- NEED 2in -->
-<H2><A NAME="1_2">Document Overview</A></H2>
-<P>This software programmers manual is organized into the following
-sections: </P>
-<UL>
-<LI><A HREF="#OVERVIEW">1 - Printing System Overview</A></LI>
-<LI><A HREF="#CUPS_API">2 - The CUPS API</A></LI>
-<LI><A HREF="#WRITING_FILTERS">3 - Writing Filters</A></LI>
-<LI><A HREF="#WRITING_DRIVERS">4 - Writing Printer Drivers</A></LI>
-<LI><A HREF="#WRITING_BACKENDS">5 - Writing Backends</A></LI>
-<LI><A HREF="#LICENSE">A - Software License Agreement</A></LI>
-<LI><A HREF="#CONSTANTS">B - Constants</A></LI>
-<LI><A HREF="#STRUCTURES">C - Structures</A></LI>
-<LI><A HREF="#FUNCTIONS">D - Functions</A></LI>
-</UL>
-<H2><A NAME="1_3">Notation Conventions</A></H2>
-<P>Various font and syntax conventions are used in this guide. Examples
-and their meanings and uses are explained below:
-<CENTER>
-<TABLE WIDTH="80%">
-<TR><TH>Example</TH><TD> </TD><TH>Description</TH></TR>
-<TR><TD> </TD></TR>
-<TR VALIGN="TOP"><TD><CODE>lpstat</CODE>
-<BR><CODE> lpstat(1)</CODE></TD><TD> </TD><TD>The names of commands;
-the first mention of a command or function in a chapter is followed by
-a manual page section number.</TD></TR>
-<TR><TD> </TD></TR>
-<TR VALIGN="TOP"><TD><VAR>/var</VAR>
-<BR><VAR> /usr/share/cups/data/testprint.ps</VAR></TD><TD> </TD><TD>
-File and directory names.</TD></TR>
-<TR><TD> </TD></TR>
-<TR VALIGN="TOP"><TD NOWRAP><TT>Request ID is Printer-123</TT></TD><TD>
- </TD><TD>Screen output.</TD></TR>
-<TR><TD> </TD></TR>
-<TR VALIGN="TOP"><TD NOWRAP><KBD>lp -d printer filename ENTER</KBD></TD><TD>
- </TD><TD>Literal user input; special keys like <KBD>ENTER</KBD> are
- in ALL CAPS.</TD></TR>
-<TR><TD> </TD></TR>
-<TR VALIGN="TOP"><TD>12.3</TD><TD> </TD><TD>Numbers in the text are
-written using the period (.) to indicate the decimal point.</TD></TR>
-</TABLE>
-</CENTER>
-
-<!-- NEED 3in -->
-</P>
-<H2><A NAME="1_4">Abbreviations</A></H2>
- The following abbreviations are used throughout this manual:
-<UL>
-<DL>
-<DT>kb </DT>
-<DD>Kilobytes, or 1024 bytes
-<BR> </DD>
-<DT>Mb </DT>
-<DD>Megabytes, or 1048576 bytes
-<BR> </DD>
-<DT>Gb </DT>
-<DD>Gigabytes, or 1073741824 bytes
-<BR> </DD>
-</DL>
-</UL>
-<H2><A NAME="1_5">Other References</A></H2>
-<UL>
-<DL>
-<DT>CUPS Software Administrators Manual </DT>
-<DD>An administration guide for the CUPS software.
-<BR> </DD>
-<DT>CUPS Software Users Manual </DT>
-<DD>An end-user guide for using the CUPS software.
-<BR> </DD>
-</DL>
-</UL>
-<H1 ALIGN="RIGHT"><A NAME="OVERVIEW">1 - Printing System Overview</A></H1>
-<P>This chapter provides an overview of how the Common UNIX Printing
-System works. </P>
-<H2><A NAME="2_1">The Printing Problem</A></H2>
-<P>For years <I>the printing problem</I> has plagued UNIX. Unlike
-Microsoft® Windows® or Mac OS, UNIX has no standard interface or system
-in place for supporting printers. Among the solutions currently
-available, the Berkeley and System V printing systems are the most
-prevalent. </P>
-<P>These printing systems support line printers (text only) or
-PostScript printers (text and graphics), and with some coaxing they can
-be made to support a full range of printers and file formats. However,
-because each varient of the UNIX operating system uses a different
-printing system than the next developing printer drivers for a wide
-range of printers and operating systems is extremely difficult. That
-combined with the limited volume of customers for each UNIX varient has
-forced most printer vendors to give up supporting UNIX entirely. </P>
-<P>CUPS is designed to eliminate <I>the printing problem</I>. One
-common printing system can be used by all UNIX varients to support the
-printing needs of users. Printer vendors can use its modular filter
-interface to develop a single driver program that supports a wide range
-of file formats with little or no effort. Since CUPS provides both the
-System V and Berkeley printing commands, users (and applications) can
-reap the benefits of this new technology with no changes. </P>
-<H2><A NAME="2_2">The Technology</A></H2>
-<P>CUPS is based upon an emerging Internet standard called the Internet
-Printing Protocol. IPP has been embraced by dozens of printer and
-printer server manufacturers and is supported by Microsoft Windows
-2000. </P>
-<P>IPP defines a standard protocol for printing as well as managing
-print jobs and printer options like media size, resolution, and so
-forth. Like all IP-based protocols, IPP can be used locally or over the
-Internet to printers hundreds or thousands of miles away. Unlike other
-protocols, however, IPP also supports access control, authentication,
-and encryption, making it a much more capable and secure printing
-solution than older ones. </P>
-<P>IPP is layered on top of the Hyper-Text Transport Protocol ("HTTP")
-which is the basis of web servers on the Internet. This allows users to
-view documentation, check status information on a printer or server,
-and manage their printers, classes, and jobs using their web browser. </P>
-<P>CUPS provides a complete IPP/1.1 based printing system that provides
-Basic, Digest, and local certificate authentication and user, domain,
-or IP-based access control. TLS encryption will be available in future
-versions of CUPS. </P>
-<H2><A NAME="2_3">Jobs</A></H2>
-<P>Each file or set of files that is submitted for printing is called a <I>
-job</I>. Jobs are identified by a unique number starting at 1 and are
-assigned to a particular destination, usually a printer. Jobs can also
-have options associated with them such as media size, number of copies,
-and priority. </P>
-<H2><A NAME="2_4">Classes</A></H2>
-<P>CUPS supports collections of printers known as <I>classes</I>. Jobs
-sent to a class are forwarded to the first available printer in the
-class. </P>
-<H2><A NAME="2_5">Filters</A></H2>
-<P>Filters allow a user or application to print many types of files
-without extra effort. Print jobs sent to a CUPS server are filtered
-before sending them to a printer. Some filters convert job files to
-different formats that the printer can understand. Others perform page
-selection and ordering tasks. </P>
-<P>CUPS provides filters for printing many types of image files,
-HP-GL/2 files, PDF files, and text files. CUPS also supplies PostScript
-and image file Raster Image Processor ("RIP") filters that convert
-PostScript or image files into bitmaps that can be sent to a raster
-printer. </P>
-<H2><A NAME="2_6">Backends</A></H2>
-<P>Backends perform the most important task of all - they send the
-filtered print data to the printer. </P>
-<P>CUPS provides backends for printing over parallel, serial, and USB
-ports, and over the network via the IPP, JetDirect (AppSocket), and
-Line Printer Daemon ("LPD") protocols. Additional backends are
-available in network service packages such as the SMB backend included
-with the popular SAMBA software. </P>
-<P>Backends are also used to determine the available devices. On
-startup each backend is asked for a list of devices it supports, and
-any information that is available. This allows the parallel backend to
-tell CUPS that an EPSON Stylus Color 600 printer is attached to
-parallel port 1, for example. </P>
-<H2><A NAME="2_7">Printer Drivers</A></H2>
-<P>Printer drivers in CUPS consist of one of more filters specific to a
-printer. CUPS includes sample printer drivers for Hewlett-Packard
-LaserJet and DeskJet printers and EPSON 9-pin, 24-pin, Stylus Color,
-and Stylus Photo printers. While these drivers do not generate optimal
-output for the different printer models, they do provide basic printing
-and demonstrate how you can write your own printer drivers and
-incorporate them into CUPS. </P>
-<H2><A NAME="2_8">Networking</A></H2>
-<P>Printers and classes on the local system are automatically shared
-with other systems on the network. This allows you to setup one system
-to print to a printer and use this system as a printer server or spool
-host for all of the others. Users may then select a local printer by
-name or a remote printer using "name@server". </P>
-<P>CUPS also provides <I>implicit classes</I>, which are collections of
-printers and/or classes with the same name. This allows you to setup
-multiple servers pointing to the same physical network printer, for
-example, so that you aren't relying on a single system for printing.
-Because this also works with printer classes, you can setup multiple
-servers and printers and never worry about a single point of failure
-unless all of the printers and servers go down! </P>
-<H1 ALIGN="RIGHT"><A NAME="CUPS_API">2 - The CUPS API</A></H1>
-<P>This chapter describes the CUPS Application Programmers Interface
-("API"). </P>
-<H2><A NAME="3_1">The CUPS API Library</A></H2>
-<P>The CUPS library provides a whole collection of interfaces needed to
-support the internal needs of the CUPS software as well as the needs of
-applications, filters, printer drivers, and backends. </P>
-<P>Unlike the rest of CUPS, the CUPS API library is provided under the
-GNU Library General Public License. This means that you can use the
-CUPS API library in both proprietary and open-source programs. </P>
-<P>Programs that use the CUPS API library typically will include the <CODE>
-<cups/cups.h></CODE> header file: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-jobid = cupsPrintFile("myprinter", "filename.ps", "title",
- num_options, options);
-</PRE>
-</UL>
-<P>Use the <CODE>-lcups</CODE> compiler option when linking to the CUPS
-API library: </P>
-<UL>
-<PRE>
-<B>cc -o program program.c -lcups ENTER</B>
-</PRE>
-</UL>
-<P>Additional options and libraries may be required depending on the
-operating system and the location of the CUPS API library. </P>
-<H3><A NAME="3_1_1">Detecting the CUPS API Library in GNU Autoconf</A></H3>
-<P>GNU autoconf is a popular configuration tool used by many programs.
-Add the following lines to your <VAR>configure.in file to check for the
-CUPS API library in your configuration script: </VAR></P>
-<UL>
-<PRE>
-AC_CHECK_LIB(socket,socket,
-if test "$uname" != "IRIX"; then
- LIBS="-lsocket $LIBS"
-else
- echo "Not using -lsocket since you are running IRIX."
-fi)
-AC_CHECK_LIB(nsl,gethostbyaddr,
-if test "$uname" != "IRIX"; then
- LIBS="-lnsl $LIBS"
-else
- echo "Not using -lnsl since you are running IRIX."
-fi)
-
-AC_CHECK_LIB(cups,httpConnect)
-</PRE>
-</UL>
-<H2><A NAME="3_2">Printing Services</A></H2>
-<P>The CUPS API library provides some basic printing services for
-applications that need to print files. </P>
-<H3><A NAME="3_2_1">Include Files</A></H3>
-<P>The include file used by all of these functions is <CODE>
-<cups/cups.h></CODE>: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-</PRE>
-</UL>
-<H3><A NAME="3_2_2">Printing a File</A></H3>
-<P>The CUPS API provides two functions for printing files. The first is <CODE>
-cupsPrintFile</CODE> which prints a single named file: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int jobid;
-
-...
-
-jobid = cupsPrintFile("<I>name</I>", "<I>filename</I>", "<I>title</I>", 0, NULL);
-</PRE>
-</UL>
-<P>The <CODE>name</CODE> string is the name of the printer or class to
-print to. The <CODE>filename</CODE> string is the name of the file to
-print. The <CODE>title</CODE> string is the name of the print job, e.g.
-"Acme Word Document". </P>
-<P>The return value is a unique ID number for the print job or 0 if
-there was an error. </P>
-<H3><A NAME="3_2_3">Printing Multiple Files</A></H3>
-<P>The second printing function is <CODE>cupsPrintFiles</CODE>: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int jobid;
-int num_files;
-const char *files[100];
-...
-
-jobid = cupsPrintFiles("name", <I>num_files</I>, <I>files</I>, "title", 0, NULL);
-</PRE>
-</UL>
-<P>Instead of passing a filename string as with <CODE>cupsPrintFile()</CODE>
-, you pass a file count (<CODE>num_files</CODE>) and filename pointer
-array (<CODE>files</CODE>) for each file that you want to print. </P>
-<P>As with <CODE>cupsPrintFile()</CODE>, the return value is a unique
-ID for the print job. </P>
-<H3><A NAME="3_2_4">Cancelling Jobs</A></H3>
-<P>The <CODE>cupsCancelJob()</CODE> function cancels a queued print
-job: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int jobid;
-int status;
-...
-
-status = cupsCancelJob("<I>name</I>", <I>jobid</I>);
-</PRE>
-</UL>
-<P>The <CODE>name</CODE> string specifies the destination and is used
-to determine the server to send the request to. The <CODE>jobid</CODE>
- value is the integer returned from a previous <CODE>cupsPrintFile()</CODE>
- or <CODE>cupsPrintFiles()</CODE> call. </P>
-<P><CODE>cupsCancelJob()</CODE> returns <CODE>1</CODE> if the job was
-successfully cancelled and <CODE>0</CODE> if there was an error. </P>
-<H3><A NAME="3_2_5">Getting the Available Printers and Classes</A></H3>
-<P>The <CODE>cupsGetDests()</CODE> function can be used to get a list
-of the available printers, classes, and instances that a user has
-defined: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int num_dests;
-cups_dest_t *dests;
-
-...
-
-num_dests = cupsGetDests(&dests);
-</PRE>
-</UL>
-<P>Each destination is stored in a <CODE>cups_dest_t</CODE> structure
-which defines the printer or class name, the instance name (if any), if
-it is the default destination, and the default options the user has
-defined for the destination: </P>
-<UL>
-<PRE>
-typedef struct /**** Destination ****/
-{
- char *name, /* Printer or class name */
- *instance; /* Local instance name or NULL */
- int is_default; /* Is this printer the default? */
- int num_options; /* Number of options */
- cups_option_t *options; /* Options */
-} cups_dest_t;
-</PRE>
-</UL>
-<P>The destinations are sorted by name and instance for your
-convenience. Once you have the list of available destinations, you can
-lookup a specific destination using the <CODE>cupsGetDest()</CODE>
- function: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int num_dests;
-cups_dest_t *dests;
-cups_dest_t *mydest;
-
-...
-
-mydest = cupsGetDest("<I>name</I>", "<I>instance</I>", num_dests, dests);
-</PRE>
-</UL>
-<P>The <CODE>name</CODE> string is the printer or class name. You can
-pass a value of <CODE>NULL</CODE> to get the default destination. </P>
-<P>The <CODE>instance</CODE> string is the user-defined instance name.
-Pass <CODE>NULL</CODE> to select the default instance, e.g. "name"
-instead of "name/instance". </P>
-<H3><A NAME="3_2_6">Printing with Options</A></H3>
-<P>All of the previous printing examples have passed <CODE>0</CODE> and <CODE>
-NULL</CODE> for the last two arguments to the <CODE>cupsPrintFile()</CODE>
- and <CODE>cupsPrintFiles()</CODE> functions. These last two arguments
-are the number of options and a pointer to the option array: </P>
-<UL>
-<PRE>
-int cupsPrintFile(const char *name, const char *filename, const char *title,
- int num_options, cups_option_t *options);
-int cupsPrintFiles(const char *name, int num_files, const char **files,
- const char *title, int num_options,
- cups_option_t *options);
-</PRE>
-</UL>
-<P>The <CODE>cups_option_t</CODE> structure holds each option and its
-value. These are converted as needed and passed to the CUPS server when
-printing a file. </P>
-<P>The simplest way of handling options is to use the <CODE>num_options</CODE>
- and <CODE>options</CODE> members of the <CODE>cups_dest_t</CODE>
- structure described earlier: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int jobid;
-int num_dests;
-cups_dest_t *dests;
-cups_dest_t *mydest;
-
-...
-
-mydest = cupsGetDest("<I>name</I>", "<I>instance</I>", num_dests, dests);
-
-jobid = cupsPrintFile(mydest->name, "filename", "title",
- mydest->num_options, mydest->options);
-</PRE>
-</UL>
-<P>This effectively uses the options a user has previous selected
-without a lot of code. </P>
-<H3><A NAME="3_2_7">Setting Printer Options</A></H3>
-<P>Options can also be set by your program using the <CODE>
-cupsAddOption()</CODE> function: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int num_options;
-cups_option_t *options;
-
-...
-
-num_options = 0;
-options = NULL;
-
-...
-
-num_options = cupsAddOption("<I>name</I>", "<I>value</I>", num_options, &options);
-num_options = cupsAddOption("<I>name</I>", "<I>value</I>", num_options, &options);
-num_options = cupsAddOption("<I>name</I>", "<I>value</I>", num_options, &options);
-num_options = cupsAddOption("<I>name</I>", "<I>value</I>", num_options, &options);
-</PRE>
-</UL>
-<P>The <CODE>name</CODE> string is the name of the option, and the <CODE>
-value</CODE> string is the value for that option. </P>
-<P>Each call to <CODE>cupsAddOption()</CODE> returns the new number of
-options. Since adding two options with the same name overwrites the
-first value with the second, do not assume that calling <CODE>
-cupsAddOptions()</CODE> 20 times will result in 20 options. </P>
-<P>Call <CODE>cupsFreeOptions</CODE> once you are done using the
-options: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int num_options;
-cups_option_t *options;
-
-...
-
-cupsFreeOptions(num_options, options);
-</PRE>
-</UL>
-<H3><A NAME="3_2_8">Getting Errors</A></H3>
-<P>If any of the CUPS API printing functions returns an error, the
-reason for that error can be found by calling <CODE>cupsLastError()</CODE>
- and <CODE>cupsErrorString()</CODE>. <CODE>cupsLastError()</CODE>
- returns the last IPP error code that was encountered. <CODE>
-cupsErrorString()</CODE> converts the error code to a localized message
-string suitable for presentation to the user: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-int jobid;
-
-...
-
-if (jobid == 0)
- puts(cupsErrorString(cupsLastError()));
-</PRE>
-</UL>
-<H3><A NAME="3_2_9">Passwords and Authentication</A></H3>
-<P>CUPS supports authentication of any request, including submission of
-print jobs. The default mechanism for getting the username and password
-is to use the login user and a password from the console. </P>
-<P>To support other types of applications, in particular Graphical User
-Interfaces ("GUIs"), the CUPS API provides functions to set the default
-username and to register a callback function that returns a password
-string. </P>
-<P>The <A HREF="cupsSetPasswordCB"><CODE>cupsSetPasswordCB()</CODE></A>
- function is used to set a password callback in your program. Only one
-function can be used at any time. </P>
-<P>The <A HREF="cupsSetUser"><CODE>cupsSetUser()</CODE></A> function
-sets the current username for authentication. This function can be
-called by your password callback function to change the current
-username as needed. </P>
-<P>The following example shows a simple password callback that gets a
-username and password from the user: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-const char *
-my_password_cb(const char *prompt)
-{
- char user[65];
-
-
- puts(prompt);
-
- /* Get a username from the user */
- printf("Username: ");
- if (fgets(user, sizeof(user), stdin) == NULL)
- return (NULL);
-
- /* Strip the newline from the string and set the user */
- user[strlen(user) - 1] = '\0';
-
- cupsSetUser(user);
-
- /* Use getpass() to ask for the password... */
- return (getpass("Password: "));
-}
-
-...
-
-cupsSetPasswordCB(my_password_cb);
-</PRE>
-</UL>
-<P>Similarly, a GUI interface could display the prompt string in a
-window with input fields for the username and password. The username
-should probably default to the value of <A HREF="#cupsUser"><CODE>
-cupsUser()</CODE></A> to make things easier on the user. </P>
-<H2><A NAME="3_3">PPD Services</A></H2>
-<P>CUPS includes functions to access and manipulate PostScript Printer
-Description ("PPD") files that are used with the printer drivers in
-CUPS. </P>
-<P>Each PPD file enumerates the available features provided by a
-printer, including conflict information for specific options (e.g.
-can't duplex output on envelopes.) </P>
-<H3><A NAME="3_3_1">Include Files</A></H3>
-<P>Include the <CODE><cups/ppd.h></CODE> header file to use the PPD
-functions: </P>
-<UL>
-<PRE>
-#include <cups/ppd.h>
-</PRE>
-</UL>
-<P>This header file is also included by the <CODE><cups/cups.h></CODE>
- header file. </P>
-<H3><A NAME="3_3_2">Getting a PPD File for a Printer</A></H3>
-<P>The <CODE>cupsGetPPD()</CODE> function retrieves the PPD file for
-the named printer or class: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-const char *filename;
-
-filename = cupsGetPPD("<I>name</I>");
-</PRE>
-</UL>
-<P>The <CODE>name</CODE> string is the name of the printer or class,
-including the remote server name as appropriate (e.g.
-"printer@server".) </P>
-<P>The return value is a pointer to a filename in static storage; this
-value is overwritten with each call to <CODE>cupsGetPPD()</CODE>. If
-the printer or class does not exist, a <CODE>NULL</CODE> pointer will
-be returned. </P>
-<H3><A NAME="3_3_3">Loading a PPD File</A></H3>
-<P>The <CODE>ppdOpenFile()</CODE> function "opens" a PPD file and loads
-it into memory: </P>
-<UL>
-<PRE>
-#include <cups/ppd.h>
-
-...
-
-ppd_file_t *ppd;
-
-ppd = ppdOpenFile("<I>filename</I>");
-</PRE>
-</UL>
-<P>The <CODE>filename</CODE> string is the name of the file to load,
-such as the value returned by the <CODE>cupsGetPPD()</CODE> function. </P>
-<P>The return value is a pointer to a structure describing the contents
-of the PPD file or NULL if the PPD file could not be read. </P>
-<H3><A NAME="3_3_4">Freeing PPD File Information</A></H3>
-<P>Once you are done using a PPD file, call the <CODE>ppdClose()</CODE>
- function to free all memory that has been used: </P>
-<UL>
-<PRE>
-#include <cups/ppd.h>
-
-...
-
-ppd_file_t *ppd;
-
-...
-
-ppdClose(ppd);
-</PRE>
-</UL>
-<H3><A NAME="3_3_5">The PPD File Structure</A></H3>
-<P>Each PPD file contains a number of capability attributes, printer
-options, and conflict definitions. The page size options also include
-the physical margins for the printer and the minimum and maximum sizes
-for the printer. All of this information is stored in the <CODE>
-ppd_file_t</CODE> structure. </P>
-<H4>Capabilities</H4>
-<P>Each PPD file contains a number of informational attributes that
-describe the capabilities of the printer. These are provided in the <CODE>
-ppd_file_t</CODE> structure in the following members:
-<CENTER>
-<TABLE BORDER="1" WIDTH="80%">
-<TR><TH>Member</TH><TH>Type</TH><TH>Description</TH></TR>
-<TR><TD><CODE>accurate_screens</CODE></TD><TD><CODE>int</CODE></TD><TD>
-1 = supports accurate screens</TD></TR>
-<TR><TD><CODE>color_device</CODE></TD><TD><CODE>int</CODE></TD><TD>1 =
-color device</TD></TR>
-<TR><TD><CODE>colorspace</CODE></TD><TD><CODE>ppd_cs_t</CODE></TD><TD>
-Default colorspace: PPD_CS_CMYK, PPD_CS_CMY, PPD_CS_GRAY, PPD_CS_RGB,
-PPD_CS_RGBK, PPD_CS_N</TD></TR>
-<TR><TD><CODE>contone_only</CODE></TD><TD><CODE>int</CODE></TD><TD>1 =
-printer is continuous tone only</TD></TR>
-<TR><TD><CODE>num_emulations
-<BR> emulations</CODE></TD><TD><CODE>int
-<BR> ppd_emul_t *</CODE></TD><TD>Emulations supported by the printer</TD>
-</TR>
-<TR><TD><CODE>flip_duplex</CODE></TD><TD><CODE>int</CODE></TD><TD>1 =
-need to flip odd pages when duplexing</TD></TR>
-<TR><TD><CODE>num_fonts
-<BR> fonts</CODE></TD><TD><CODE>int
-<BR> char **</CODE></TD><TD>The fonts available on the printer.</TD></TR>
-<TR><TD><CODE>jcl_begin
-<BR> jcl_ps
-<BR> jcl_end</CODE></TD><TD><CODE>char *</CODE></TD><TD>Job Control
-Language commands for PostScript output</TD></TR>
-<TR><TD><CODE>landscape</CODE></TD><TD><CODE>int</CODE></TD><TD>
-Landscape orientation, -90 or 90 degrees</TD></TR>
-<TR><TD><CODE>lang_encoding</CODE></TD><TD><CODE>char *</CODE></TD><TD>
-The character used for the option strings</TD></TR>
-<TR><TD><CODE>lang_version</CODE></TD><TD><CODE>char *</CODE></TD><TD>
-The language used for the options strings (English, French, etc.)</TD></TR>
-<TR><TD><CODE>language_level</CODE></TD><TD><CODE>int</CODE></TD><TD>
-PostScript language level, 1 to 3</TD></TR>
-<TR><TD><CODE>manual_copies</CODE></TD><TD><CODE>int</CODE></TD><TD>1 =
-Copies are done manually</TD></TR>
-<TR><TD><CODE>model_number</CODE></TD><TD><CODE>int</CODE></TD><TD>
-Driver-specific model number.</TD></TR>
-<TR><TD><CODE>patches</CODE></TD><TD><CODE>char *</CODE></TD><TD>Patch
-commands to send to the printer</TD></TR>
-<TR><TD><CODE>manufacturer</CODE></TD><TD><CODE>char *</CODE></TD><TD>
-The Manufacturer attribute from the PPD file, if any</TD></TR>
-<TR><TD><CODE>modelname</CODE></TD><TD><CODE>char *</CODE></TD><TD>The
-ModelName attribute from the PPD file</TD></TR>
-<TR><TD><CODE>nickname</CODE></TD><TD><CODE>char *</CODE></TD><TD>The
-NickName attribute from the PPD file, if any</TD></TR>
-<TR><TD><CODE>product</CODE></TD><TD><CODE>char *</CODE></TD><TD>The
-Product attribute from the PPD file, if any</TD></TR>
-<TR><TD><CODE>shortnickname</CODE></TD><TD><CODE>char *</CODE></TD><TD>
-The ShortNickName attribute from the PPD file, if any</TD></TR>
-<TR><TD><CODE>throughput</CODE></TD><TD><CODE>int</CODE></TD><TD>Number
-of pages per minute</TD></TR>
-<TR><TD><CODE>ttrasterizer</CODE></TD><TD><CODE>char *</CODE></TD><TD>
-The TruType font rasterizer (Type42)</TD></TR>
-<TR><TD><CODE>variable_sizes</CODE></TD><TD><CODE>int</CODE></TD><TD>1
-= supports variable sizes</TD></TR>
-</TABLE>
-</CENTER>
-</P>
-<H4>Options and Groups</H4>
-<P>PPD files support multiple options, which are stored in <CODE>
-ppd_option_t</CODE> and <CODE>ppd_choice_t</CODE> structures by the PPD
-functions. </P>
-<P>Each option in turn is associated with a group stored in the <CODE>
-ppd_group_t</CODE> structure. Groups can be specified in the PPD file;
-if an option is not associated with a group then it is put in a
-"General" or "Extra" group depending on the option. </P>
-<P>Groups can also have sub-groups; CUPS currently limits the depth of
-sub-groups to 1 level to reduce programming complexity. </P>
-<H4>Conflicts</H4>
-<P>PPD files support specification of conflict conditions between
-different options. Conflicts are stored in <CODE>ppd_conflict_t</CODE>
- structures which specify the options that conflict with each other. </P>
-<H4>Page Sizes</H4>
-<P>PPD files specify all of the available pages sizes and the physical
-margins associated with them. These sizes are stored in <CODE>ppd_size_t</CODE>
- structures and are available in the <CODE>num_sizes</CODE> and <CODE>
-sizes</CODE> members of the <CODE>ppd_file_t</CODE> structure. You can
-lookup a particular page size with the <CODE>ppdPageWidth()</CODE>, <CODE>
-ppdPageLength()</CODE>, and <CODE>ppdPageSize()</CODE> functions: </P>
-<UL>
-<PRE>
-#include <cups/ppd.h>
-
-...
-
-ppd_file_t *ppd;
-ppd_size_t *size;
-float width;
-float length;
-
-...
-
-size = ppdPageSize(ppd, "<I>size</I>");
-width = ppdPageWidth(ppd, "<I>size</I>");
-length = ppdPageLength(ppd, "<I>size</I>");
-</PRE>
-</UL>
-<P>The <CODE>size</CODE> string is the named page size option. The
-width and length are in points; there are 72 points per inch. The <CODE>
-ppd_size_t</CODE> structure contains the width, length, and margin
-information: </P>
-<UL>
-<PRE>
-typedef struct /**** Page Sizes ****/
-{
- int marked; /* Page size selected? */
- char name[41]; /* Media size option */
- float width, /* Width of media in points */
- length, /* Length of media in points */
- left, /* Left printable margin in points */
- bottom, /* Bottom printable margin in points */
- right, /* Right printable margin in points */
- top; /* Top printable margin in points */
-} ppd_size_t;
-</PRE>
-</UL>
-<H4>Custom Page Sizes</H4>
-<P>Besides the standard page sizes listed in a PPD file, some printers
-support variable or custom page sizes. If <CODE>variables_sizes</CODE>
- is non-zero, the <CODE>custom_min</CODE>, <CODE>custom_max</CODE>, and <CODE>
-custom_margins</CODE> members of the <CODE>ppd_file_t</CODE> structure
-define the limits of the variable sizes. </P>
-<P>To get the resulting media size, use a page size string of <CODE>
-Custom.<I>width</I>x<I>length</I></CODE>, where <CODE>width</CODE> and <CODE>
-length</CODE> are integer values in points: </P>
-<UL>
-<PRE>
-Custom.612x792 [8.5 inches wide, 11 inches long]
-Custom.1224x792 [17 inches wide, 11 inches long]
-</PRE>
-</UL>
-<H3><A NAME="3_3_6">Marking Options</A></H3>
-<P>Before marking any user-defined options, call the <CODE>
-ppdMarkDefaults()</CODE> function to mark the default options from the
-PPD file: </P>
-<UL>
-<PRE>
-#include <cups/ppd.h>
-
-...
-
-ppd_file_t *ppd;
-
-...
-
-ppdMarkDefaults(ppd);
-</PRE>
-</UL>
-<P>Then call the <CODE>ppdMarkOption()</CODE> function to mark
-individual options: </P>
-<UL>
-<PRE>
-#include <cups/ppd.h>
-
-...
-
-ppd_file_t *ppd;
-int conflicts;
-
-...
-
-conflicts = ppdMarkOption(ppd, "<I>name</I>", "<I>value</I>");
-</PRE>
-</UL>
-<P>The <CODE>name</CODE> and <CODE>value</CODE> strings choose a
-particular option and choice, respectively. The return value is 0 if
-there are not conflicts created by the selection. </P>
-<P>CUPS also provides a convenience function for marking all options in
-the <CODE>cups_option_t</CODE> structure: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-ppd_file_t *ppd;
-int num_options;
-cups_option_t *options;
-int conflicts;
-
-...
-
-conflicts = cupsMarkOptions(ppd, num_options, options);
-</PRE>
-</UL>
-<P>The <CODE>cupsMarkOptions()</CODE> function also handles mapping the
-IPP job template attributes to PPD options. The return value is the
-number of conflicts present. </P>
-<H3><A NAME="3_3_7">Checking for Conflicts</A></H3>
-<P>The <CODE>ppdMarkOption()</CODE> and <CODE>cupsMarkOptions()</CODE>
- functions return the number of conflicts with the currently marked
-options. </P>
-<P>Call the <CODE>ppdConflicts()</CODE> function to get the number of
-conflicts after you have marked all of the options: </P>
-<UL>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-ppd_file_t *ppd;
-int conflicts;
-
-...
-
-conflicts = ppdConflicts(ppd);
-</PRE>
-</UL>
-<P>The return value is the number of conflicting options, or 0 if there
-are no conflicts. </P>
-<H1 ALIGN="RIGHT"><A NAME="WRITING_FILTERS">3 - Writing Filters</A></H1>
-<P>This chapter describes how to write a file filter for CUPS. </P>
-<H2><A NAME="4_1">Overview</A></H2>
-<P>File filters are programs that convert from one or more MIME types
-to another type. Filters use a common command-line and environment
-interface that allows them to be joined as needed to print files to any
-type of printer. </P>
-<H3><A NAME="4_1_1">Security Considerations</A></H3>
-<P>Filters are normally run as a non-priviledged user, so the major
-security consideration is resource utilization - filters should not
-depend on unlimited amounts of memory and disk space. </P>
-<H3><A NAME="4_1_2">Users and Groups</A></H3>
-<P>The default CUPS configuration runs filters as user "lp" and group
-"other". </P>
-<H3><A NAME="4_1_3">Temporary Files</A></H3>
-<P>Temporary files should be created in the directory specified by the
-"TMPDIR" environment variable. The <A HREF="#cupsTempFile"><CODE>
-cupsTempFile()</CODE></A> function can be used to safely choose
-temporary files in this directory. </P>
-<H3><A NAME="4_1_4">Sending Messages to the User</A></H3>
-<P>The CUPS scheduler collects messages sent to the standard error file
-by the filter. These messages are relayed to the user based upon the
-scheduler <CODE>LogLevel</CODE> directive. </P>
-<P>The type of message is determined by an initial prefix sent on each
-line: </P>
-<UL>
-<LI><CODE>DEBUG:</CODE> - a debug message </LI>
-<LI><CODE>INFO:</CODE> - an informational message </LI>
-<LI><CODE>WARNING:</CODE> - a warning message </LI>
-<LI><CODE>ERROR:</CODE> - an error message </LI>
-<LI><CODE>PAGE:</CODE> - a page accounting message </LI>
-</UL>
-<P>If the line of text does not begin with any of the above prefixes,
-it is treated as a debug message. Text following the prefix is copied
-to the <CODE>printer-state-message</CODE> attribute for the printer,
-and also added to the <VAR>error_log</VAR> unless it is an
-informational or page accounting message. </P>
-<H3><A NAME="4_1_5">Page Accounting</A></H3>
-<P>Page accounting messages are used to inform the server when one or
-more pages are printed. Each line has the form: </P>
-<UL>
-<PRE>
-PAGE: page-number copy-count
-</PRE>
-</UL>
-<P>The <I>page-number</I> field is the current page number, starting at
-1. The <I>copy-count</I> field specifies the number of copies of that
-page that was produced. </P>
-<P>Page account messages are added to the <VAR>page_log</VAR> file and
-cause the <CODE>job-sheets-completed</CODE> attribute to be updated for
-the job. </P>
-<H3><A NAME="4_1_6">Command-Line Arguments</A></H3>
-<P>Every filter accepts exactly 6 or 7 command-line arguments: </P>
-<UL>
-<PRE>
-printer job user title copies options [filename]
-</PRE>
-<LI><CODE>printer</CODE> - The name of the printer queue (normally
- this is the name of the program being run) </LI>
-<LI><CODE>job</CODE> - The numeric job ID for the job being printed </LI>
-<LI><CODE>user</CODE> - The string from the <CODE> originating-user-name</CODE>
- attribute </LI>
-<LI><CODE>title</CODE> - The string from the <CODE> job-name</CODE>
- attribute </LI>
-<LI><CODE>copies</CODE> - The numeric value from the <CODE>
- number-copies</CODE> attribute </LI>
-<LI><CODE>options</CODE> - String representations of the job template
-attributes, separated by spaces. Boolean attributes are provided as
-"name" for true values and "noname" for false values. All other
-attributes are provided as "name=value" for single-valued attributes
-and "name=value1,value2,...,valueN" for set attributes </LI>
-<LI><CODE>filename</CODE> - The request file </LI>
-</UL>
-<P>The <I>filename</I> argument is only provided to the first filter in
-the chain; all filters <B>must</B> be prepared to read the print file
-from the standard input if the <I>filename</I> argument is omitted. </P>
-<H3><A NAME="4_1_7">Copy Generation</A></H3>
-<P>The <I>copies</I> argument specifies the number of copies to produce
-of the input file. In general, you should only generate copies if the <I>
-filename</I> argument is supplied. The only exception to this are
-filters that produce device-independent PostScript output (without any
-printer commands from the printer's PPD file), since the PostScript
-filter <CODE>pstops</CODE> is responsible for copy generation. </P>
-<H3><A NAME="4_1_8">Environment Variables</A></H3>
-<P>Every filter receives a fixed set of environment variables that can
-be used by the filter: </P>
-<UL>
-<LI><CODE>CHARSET</CODE> - The character set used by the client for
- this print file </LI>
-<LI><CODE>CONTENT_TYPE</CODE> - The original document type, such as
- "application/postscript" </LI>
-<LI><CODE>CUPS_DATADIR</CODE> - The location of CUPS data files </LI>
-<LI><CODE>CUPS_SERVERROOT</CODE> - The location of CUPS configuration
- files </LI>
-<LI><CODE>DEVICE_URI</CODE> - The output device URI </LI>
-<LI><CODE>LANG</CODE> - The language used by the client for this print
-file </LI>
-<LI><CODE>PATH</CODE> - The execution path exported to the filter </LI>
-<LI><CODE>PPD</CODE> - The full filename of the printer's PPD file </LI>
-<LI><CODE>PRINTER</CODE> - The name of the printer queue </LI>
-<LI><CODE>RIP_CACHE</CODE> - The maximum amount of memory each filter
- should use </LI>
-<LI><CODE>SOFTWARE</CODE> - The name of the CUPS software, typically
- "CUPS/1.1" </LI>
-<LI><CODE>TZ</CODE> - The local timezone </LI>
-<LI><CODE>USER</CODE> - The name of the current user </LI>
-</UL>
-<H2><A NAME="4_2">Dissecting the HP-GL/2 Filter</A></H2>
-<P>The HP-GL/2 filter (<CODE>hpgltops</CODE>) provided with CUPS is a
-complex program that converts HP-GL/2 files into device-independent
-PostScript output. Since it produces device-independent PostScript
-output, it does not need to handle copy generation or writing printer
-options from the printer's PPD file. </P>
-<H3><A NAME="4_2_1">Initializing the Filter</A></H3>
-<P>The first task of any filter is to ensure that the correct number of
-command-line arguments are present: </P>
-<UL>
-<PRE>
-if (argc < 6 || argc > 7)
-{
- fputs("ERROR: hpgltops job-id user title copies options [file]\n", stderr);
- return (1);
-}
-</PRE>
-</UL>
-<P>After this you open the print file or read from the standard input
-as needed: </P>
-<UL>
-<PRE>
-FILE *fp;
-
-/*
- * If we have 7 arguments, print the file named on the command-line.
- * Otherwise, send stdin instead...
- */
-
-if (argc == 6)
- fp = stdin;
-else
-{
- /*
- * Try to open the print file...
- */
-
- if ((fp = fopen(argv[6], "rb")) == NULL)
- {
- perror("ERROR: unable to open print file - ");
- return (1);
- }
-}
-</PRE>
-</UL>
-<P>Once the print file has been opened, options can be processed using
-the <A HREF="#cupsParseOptions"><CODE>cupsParseOptions()</CODE></A> and <A
-HREF="#cupsGetOption"><CODE>cupsGetOption()</CODE></A> functions: </P>
-<UL>
-<PRE>
-int num_options;
-cups_option_t *options;
-const char *val;
-
-/*
- * Process command-line options and write the prolog...
- */
-
-options = NULL;
-num_options = cupsParseOptions(argv[5], 0,
-
-if ((val = cupsGetOption("blackplot", num_options, options)) != NULL)
- shading = 0;
-
-if ((val = cupsGetOption("fitplot", num_options, options)) != NULL)
- FitPlot = 1;
-
-if ((val = cupsGetOption("penwidth", num_options, options)) != NULL)
- PenWidth = (float)atoi(val) * 0.001f;
-</PRE>
-</UL>
-<P>After the options have been processed, the filter writes PostScript
-code to the standard output based on the print file, closes the print
-file (as needed), and returns 0 to the scheduler. </P>
-<H2><A NAME="4_3">PostScript Output</A></H2>
-<P>Filters that produce PostScript output must generate output
-conforming to the Adobe Document Structuring Conventions, 3.0. In
-general this means the beginning of each file must begin with: </P>
-<UL>
-<PRE>
-%!PS-Adobe-3.0
-%%BoundingBox: left bottom right top
-%%Pages: (atend)
-%%EndComments
-</PRE>
-</UL>
-<P>The <I>left</I>, <I>bottom</I>, <I>right</I>, and <I>top</I> values
-are integers in points from the lower-lefthand corner of the page. </P>
-<P>Pages must be surrounded by: </P>
-<UL>
-<PRE>
-%%Page: number number
-gsave
-...
-grestore
-showpage
-</PRE>
-</UL>
-<P>And the end of each file must contain: </P>
-<UL>
-<PRE>
-%%Trailer
-%%Pages: number-pages
-%%EOF
-</PRE>
-</UL>
-<P>These comments allow the PostScript filter to correctly perform page
-accounting, copy generation, N-up printing, and so forth. </P>
-<H1 ALIGN="RIGHT"><A NAME="WRITING_DRIVERS">4 - Writing Printer Drivers</A>
-</H1>
-<P>This chapter discusses how to write a printer driver, which is a
-special filter program that converts CUPS raster data into the
-appropriate commands and data required for a printer. </P>
-<H2><A NAME="5_1">Overview</A></H2>
-<P>Raster printers utilitize PPD files that specify one or more
-device-specific filters that handle converting print files for the
-printer. The simplest raster printer drivers provide a single filter
-that converts CUPS raster data to the printer's native format. </P>
-<H3><A NAME="5_1_1">CUPS Raster Data</A></H3>
-<P>CUPS raster data (<CODE>application/vnd.cups-raster</CODE>) consists
-of a stream of raster page descriptions produced by one of the RIP
-filters, such as <CODE>pstoraster</CODE> or <CODE>imagetoraster</CODE>. </P>
-<P>Each page of data begins with a page dictionary structure called <A HREF="#cups_raster_header_t">
-<CODE>cups_raster_header_t</CODE></A>. This structure contains the
-colorspace, bits per color, media size, media type, hardware
-resolution, and so forth. </P>
-<P>After the page dictionary comes the page data which is a
-full-resolution, uncompressed bitmap representing the page in the
-printer's output colorspace. </P>
-<H3><A NAME="5_1_2">Page Accounting</A></H3>
-<P>Printer drivers must handle all page accounting. This means they
-must send "PAGE:" messages to the standard error file for each page
-(and in many cases, copy) sent to the printer. </P>
-<H3><A NAME="5_1_3">Color Management</A></H3>
-<P>Printer drivers can implement their color management via the <CODE>
-cupsColorProfile</CODE> attributes in the PPD file or internally in the
-driver from a device-independent colorspace. In general, color
-management performed by the RIP filters is more efficient than that
-performed inside printer drivers. </P>
-<P>For example, the <CODE>pstoraster</CODE> filter often only has to
-perform a color conversion once each time the color is used for
-multiple output pixels, while the raster filter must convert every
-pixel on the page. </P>
-<H3><A NAME="5_1_4">Device and Bitmap Variables</A></H3>
-<P>Besides the standard PostScript page device dictionary variables
-defined in the Adobe PostScript Level 3 reference manual, the CUPS
-filters support additional variables that are passed in the page device
-dictionary header for the page and in some cases control the type of
-raster data that is generated:
-<CENTER>
-<TABLE BORDER="1" WIDTH="90%">
-<TR><TH>Variable</TH><TH>Type</TH><TH>Description</TH></TR>
-<TR><TD>cupsWidth</TD><TD>read-only integer</TD><TD>Width of bitmap in
-pixels</TD></TR>
-<TR><TD>cupsHeight</TD><TD>read-only integer </TD><TD>Height of bitmap
-in pixels</TD></TR>
-<TR><TD>cupsMediaType</TD><TD>read-write integer</TD><TD>
-Device-specific media type code</TD></TR>
-<TR><TD>cupsBitsPerColor</TD><TD>read-write integer</TD><TD>Number of
-bits per color; 1, 2, 4, and 8 are currently supported</TD></TR>
-<TR><TD>cupsBitsPerPixel</TD><TD>read-only integer </TD><TD>Number of
-bits per pixel; 1 to 32</TD></TR>
-<TR><TD>cupsBytesPerLine</TD><TD>read-only integer</TD><TD>Number of
-bytes per line of raster graphics</TD></TR>
-<TR><TD>cupsColorOrder</TD><TD>read-write enum</TD><TD>The order of
-color values in the bitmap:
-<UL>
-<LI><CODE>CUPS_ORDER_CHUNKED</CODE> - CMYK CMYK CMYK </LI>
-<LI><CODE>CUPS_ORDER_BANDED</CODE> - CCC MMM YYY KKK </LI>
-<LI><CODE>CUPS_ORDER_PLANAR</CODE> - CCC ... MMM ... YYY ... KKK ... </LI>
-</UL>
-</TD></TR>
-<TR><TD>cupsColorSpace</TD><TD>read-write enum</TD><TD>The colorspace
-of the bitmap:
-<UL>
-<LI><CODE>CUPS_CSPACE_W</CODE> - White (luminance) </LI>
-<LI><CODE>CUPS_CSPACE_RGB</CODE> - Red, green, blue </LI>
-<LI><CODE>CUPS_CSPACE_RGBA</CODE> - Red, green, blue, alpha </LI>
-<LI><CODE>CUPS_CSPACE_K</CODE> - Black </LI>
-<LI><CODE>CUPS_CSPACE_CMY</CODE> - Cyan, magenta, yellow </LI>
-<LI><CODE>CUPS_CSPACE_YMC</CODE> - Yellow, magenta, cyan </LI>
-<LI><CODE>CUPS_CSPACE_CMYK</CODE> - Cyan, magenta, yellow, black </LI>
-<LI><CODE>CUPS_CSPACE_YMCK</CODE> - Yellow, magenta, cyan, black </LI>
-<LI><CODE>CUPS_CSPACE_KCMY</CODE> - Black, cyan, magenta, yellow </LI>
-<LI><CODE>CUPS_CSPACE_KCMYcm</CODE> - Black, cyan, magenta, yellow,
- light cyan, light magenta </LI>
-<LI><CODE>CUPS_CSPACE_GMCK</CODE> - Metallic yellow (gold), metallic
-magenta, metallic cyan, black </LI>
-<LI><CODE>CUPS_CSPACE_GMCS</CODE> - Metallic yellow (gold), metallic
-magenta, metallic cyan, metallic grey (silver) </LI>
-<LI><CODE>CUPS_CSPACE_WHITE</CODE> - White pigment (black as white
-pigment) </LI>
-<LI><CODE>CUPS_CSPACE_GOLD</CODE> - Gold foil (black as gold foil) </LI>
-<LI><CODE>CUPS_CSPACE_SILVER</CODE> - Silver foil (black as silver
-foil) </LI>
-</UL>
-</TD></TR>
-<TR><TD>cupsCompression</TD><TD>read-write integer</TD><TD>
-Device-specific compression type code</TD></TR>
-<TR><TD>cupsRowCount</TD><TD>read-write integer</TD><TD>Device-specific
-row count value</TD></TR>
-<TR><TD>cupsRowFeed</TD><TD>read-write integer</TD><TD>Device-specific
-row feed value</TD></TR>
-<TR><TD>cupsRowStep</TD><TD>read-write integer</TD><TD>Device-specific
-row step value</TD></TR>
-</TABLE>
-</CENTER>
-</P>
-<P>Bitmaps with a colorspace of CUPS_CSPACE_KCMYcm and more than 1 bit
-per color are transmitted to the raster driver in KCMY colorspace; the
-driver is responsible for producing the correct separation of normal
-and light cyan and magenta inks. </P>
-<H2><A NAME="5_2">Dissecting the HP-PCL Driver</A></H2>
-<P>The HP-PCL driver provided with CUPS (<CODE>rastertohp</CODE>)
-converts bitmap data from the raster filters into HP-PCL commands for
-most PCL-compatible printers. The actual format of the raster data is
-controlled by the PPD file being used - <VAR>deskjet.ppd</VAR> or <VAR>
-laserjet.ppd</VAR>. </P>
-<H3><A NAME="5_2_1">PPD Files</A></H3>
-<P>PPD files play an important part of all raster printer drivers.
-Options defined in the PPD file contain PostScript commands that
-control the raster data that is sent to the printer driver. </P>
-<P>A typical CUPS printer driver will include <CODE>ColorModel</CODE>, <CODE>
-InputSlot</CODE>, <CODE>PageSize</CODE>, <CODE>PageRegion</CODE>, and <CODE>
-Resolution</CODE> options. Each option is shown using the standard PPD
-format: </P>
-<UL>
-<PRE>
-*OpenUI *PageSize/Media Size: PickOne
-*OrderDependency: 10 AnySetup *PageSize
-*DefaultPageSize: Letter
-*PageSize Letter/US Letter: "<<
-/PageSize [612 792]
-/ImagingBBox null
->> setpagedevice"
-*End
-*PageSize Legal/US Legal: "<<
-/PageSize [612 1008]
-/ImagingBBox null
->> setpagedevice"
-*End
-*PageSize A4/A4: "<<
-/PageSize [595 842]
-/ImagingBBox null
->> setpagedevice"
-*End
-*CloseUI: *PageSize
-</PRE>
-</UL>
-<P>The <CODE>OpenUI</CODE> keyword specifies the new option. The first
-name is the option with an asterisk (*) in front of it. The first name
-is usually followed by a slash (/) and a human-readable version of the
-option name. </P>
-<P>Every option <B>must</B> have a default value, specified using the <CODE>
-Default<I>Option</I></CODE> keyword. </P>
-<P>Each option begins with the option name followed by the computer and
-human-readable values. The PostScript commands follow these inside
-double quotes. PostScript commands can be provided on a single line: </P>
-<UL>
-<PRE>
-*PageSize A4/A4: "<</PageSize[595 842]/ImagingBBox null>> setpagedevice"
-</PRE>
-</UL>
-<P>or broken down on separate lines using the <CODE>End</CODE> keyword
-to terminate them: </P>
-<UL>
-<PRE>
-*PageSize A4/A4: "<<
-/PageSize [595 842]
-/ImagingBBox null
->> setpagedevice"
-*End
-</PRE>
-</UL>
-<P>The choice of the two formats is usually esthetic. However, each
-line in a PPD file must not exceed 255 characters, so if your
-PostScript commands are long you may need to break them up on separate
-lines. </P>
-<H3><A NAME="5_2_2">Reading Raster Data</A></H3>
-<P>As with any filter, your printer driver should handle raster data
-from a filename specified on the command-line or from the standard
-input. The <A HREF="#cupsRasterOpen"><CODE>cupsRasterOpen()</CODE></A>
- function opens a raster stream for printing: </P>
-<UL>
-<PRE>
-int fd; /* File descriptor */
-cups_raster_t *ras; /* Raster stream for printing */
-
-
-/*
- * Check for valid arguments...
- */
-
-if (argc < 6 || argc > 7)
-{
- /*
- * We don't have the correct number of arguments; write an error message
- * and return.
- */
-
- fputs("ERROR: rastertopcl job-id user title copies options [file]\n", stderr);
- return (1);
-}
-
-/*
- * Open the page stream...
- */
-
-if (argc == 7)
-{
- if ((fd = open(argv[6], O_RDONLY)) == -1)
- {
- perror("ERROR: Unable to open raster file - ");
- sleep(1);
- return (1);
- }
-}
-else
- fd = 0;
-
-ras = cupsRasterOpen(fd, CUPS_RASTER_READ);
-</PRE>
-</UL>
-<P>Once you have opened the raster stream you just need to read each
-page and print it: </P>
-<UL>
-<PRE>
-cups_raster_header_t header;
-int y;
-unsigned char data[8192];
-
-while (cupsRasterReadHeader(ras, &header))
-{
- ... initialize the printer ...
- for (y = header.cupsHeight; y > 0; y ++)
- {
- cupsRasterReadPixels(ras, data, header.cupsBytesPerLine);
- ... send raster line to printer ...
- }
-}
-</PRE>
-</UL>
-<P>After you have processed all pages, close the raster stream and
-return: </P>
-<UL>
-<PRE>
-cupsRasterClose(ras);
-
-return (0);
-</PRE>
-</UL>
-<H1 ALIGN="RIGHT"><A NAME="WRITING_BACKENDS">5 - Writing Backends</A></H1>
-<P>This chapter describes how to write a backend for CUPS. Backends
-communicate directly with printers and allow printer drivers and
-filters to send data using any type of connection transparently. </P>
-<H2><A NAME="6_1">Overview</A></H2>
-<P>Backends are special filters that communicate with printers
-directly. They are treated slightly differently than filters, however,
-and have some unique requirements. </P>
-<H3><A NAME="6_1_1">Security Considerations</A></H3>
-<P>Backends are run as the root user, so special care must be taken to
-avoid potential security violations. In particular, remember that a
-backend will be able to manipulate disk files, devices, and other
-resources that potentially could damage a system or printer. </P>
-<H3><A NAME="6_1_2">Command-Line Arguments</A></H3>
-<P>Besides the standard filter arguments, backends are also run with no
-arguments to get a list of available devices. This discovery process is
-described later in this chapter. </P>
-<H3><A NAME="6_1_3">Copy Generation</A></H3>
-<P>Like filters, backends should send multiple copies of the print file
-only if a filename is supplied on the command-line. Otherwise the
-backend should assume that the upstream filter has already added the
-necessary commands or data to produce the multiple copies. </P>
-<H3><A NAME="6_1_4">Page Accounting</A></H3>
-<P>Backend filters generally do not do page accounting, however they
-should at a minimum produce a single page message for each copy that is
-produced when a filename is present on the command-line. This is
-because the user selected "raw" printing and no other accounting
-information is possible. </P>
-<H3><A NAME="6_1_5">Exclusive Access</A></H3>
-<P>Backends that talk to local character or block devices should open
-the device file in exclusive mode (<CODE>O_EXCL</CODE>) to cooperate
-with other printers defined for the same device. </P>
-<H3><A NAME="6_1_6">Retries</A></H3>
-<P>All backends <B>must</B> retry connections to the device. This
-includes backends that talk to local character or block devices, as the
-user may define more than one printer queue pointing at the same
-physical device. </P>
-<P>To prevent excess CPU utilitization, the backend should go to sleep
-for an amount of time between retries; the CUPS-supplied backends retry
-once every 30 seconds. </P>
-<H2><A NAME="6_2">Dissecting the Serial Port Backend</A></H2>
-<P>The serial port backend provides support for serial printers. Since
-it does everything a good backend needs to do, it provides an excellent
-example of what to do. </P>
-<H3><A NAME="6_2_1">Supporting Device Discovery</A></H3>
-<P>As previously noted, backends are special filter programs that talk
-to printer devices. Another task a backend must perform is to list the
-available devices it supports. The backend lists the available devices
-when no additioanl arguments are supplied on the command-line (i.e.
-just the command name...) </P>
-<P>The serial backend lists devices by looking at serial port files in
-the <VAR>/dev</VAR> directory, by consulting a hardware inventory
-(IRIX), and in some cases by trying to open the ports to see if they
-actually exist. </P>
-<P>Once it finds a serial port it writes a single line for each port to
-the standard error file. Each line looks like this: </P>
-<UL>
-<PRE>
-serial serial:/dev/ttyS0?baud=115200 "Unknown" "Serial Port 1"
-</PRE>
-</UL>
-<P>The first word "serial" is the <I>device class</I>; this identifies
-the class of device which can be used to categorize it in user
-interfaces. CUPS currently recognizes the following classes: </P>
-<UL>
-<LI>"file" - a disk file. </LI>
-<LI>"direct" - a parallel or fixed-rate serial data port, currently
-used for Centronics, IEEE-1284, and USB printer ports. </LI>
-<LI>"serial" - a variable-rate serial port. </LI>
-<LI>"network" - a network connection, typically via AppSocket, HTTP,
-IPP, LPD, or SMB/CIFS protocols. </LI>
-</UL>
-<P>After the device class is the <I>device URI</I>, in this case
-"serial:/dev/ttyS0?baud=115200". This is the URI that should be used by
-the user to select this port. For serial ports, the "baud=115200"
-specifies the maximum baud rate supported by the port - the actual
-value will vary based on the speed the user selects for the printer. </P>
-<P>The last two strings are the model and description for the port. The
-"Unknown" string means that the printer model is unknown - some devices
-are able to provide a make and model such as "HP DeskJet" that allows
-users and software to choose an appropriate printer driver more easily.
-Both the model and description must be enclosed inside double quotes. </P>
-<H3><A NAME="6_2_2">Opening the Serial Port</A></H3>
-<P>As noted previously, all backends should open device files in
-exclusive mode, and retry as needed until the port is available. The
-serial port does this using a <CODE>do-while</CODE> loop: </P>
-<UL>
-<PRE>
-do
-{
- if ((fd = open(resource, O_WRONLY | O_NOCTTY | O_EXCL)) == -1)
- {
- if (errno == EBUSY)
- {
- fputs("INFO: Serial port busy; will retry in 30 seconds...\n", stderr);
- sleep(30);
- }
- else
- {
- perror("ERROR: Unable to open serial port device file");
- return (1);
- }
- }
-}
-while (fd < 0);
-</PRE>
-</UL>
-<P>If the port is busy or in use by another process, the backend will
-go to sleep for 30 seconds and try again. If another error is detected
-a message is sent to the user and the backend aborts the print job
-until the problem can be corrected. </P>
-<H3><A NAME="6_2_3">Writing Data to the Port</A></H3>
-<P>Network and character devices pose an interesting problem when
-writing data to the port - they may not be able to write all of the
-bytes in your buffer before returning. To work around this problem you
-must loop until all bytes have been written: </P>
-<UL>
-<PRE>
-while (nbytes > 0)
-{
- if ((wbytes = write(fd, bufptr, nbytes)) < 0)
- if (errno == ENOTTY)
- wbytes = write(fd, bufptr, nbytes);
-
- if (wbytes < 0)
- {
- perror("ERROR: Unable to send print file to printer");
- break;
- }
-
- nbytes -= wbytes;
- bufptr += wbytes;
-}
-</PRE>
-</UL>
-<P>The check for the <CODE>ENOTTY</CODE> error is needed on some
-platforms to clear an error from a previous <CODE>ioctl()</CODE> call. </P>
-<H3><A NAME="6_2_4">Finishing Up</A></H3>
-<P>Once you have sent the print file, return 0 if the file printed
-successfully or 1 if it did not. This will allow the scheduler to stop
-the print job if there is a device error, preserving the print job for
-later printing once the problem has been corrected. </P>
-<H1 ALIGN="RIGHT"><A NAME="LICENSE">A - Software License Agreement</A></H1>
-<H2 ALIGN="CENTER"><A NAME="7_1">Common UNIX Printing System License
-Agreement</A></H2>
-<P ALIGN="CENTER">Copyright 1997-2000 by Easy Software Products
-<BR> 44141 AIRPORT VIEW DR STE 204
-<BR> HOLLYWOOD, MARYLAND 20636-3111 USA
-<BR>
-<BR> Voice: +1.301.373.9603
-<BR> Email: <A HREF="mailto:cups-info@cups.org">cups-info@cups.org</A>
-<BR> WWW: <A HREF="http://www.cups.org">http://www.cups.org</A></P>
-<H3><A NAME="7_1_1">Introduction</A></H3>
-<P>The Common UNIX Printing System<SUP>TM</SUP>, ("CUPS<SUP>TM</SUP>"),
-is provided under the GNU General Public License ("GPL") and GNU
-Library General Public License ("LGPL"), Version 2. A copy of these
-licenses follow this introduction. </P>
-<P>The GNU LGPL applies to the CUPS API library, located in the "cups"
-subdirectory of the CUPS source distribution and in the
-"/usr/include/cups" directory and "libcups.a", "libcups.sl", or
-"libcups.so" files in the binary distributions. </P>
-<P>The GNU GPL applies to the remainder of the CUPS distribution,
-including the "pstoraster" filter which is based upon GNU Ghostscript
-5.50 and the "pdftops" filter which is based upon Xpdf 0.90. </P>
-<P>For those not familiar with the GNU GPL, the license basically
-allows you to: </P>
-<UL>
-<LI>Use the CUPS software at no charge. </LI>
-<LI>Distribute verbatim copies of the software in source or binary
-form. </LI>
-<LI>Sell verbatim copies of the software for a media fee, or sell
-support for the software. </LI>
-<LI>Distribute or sell printer drivers and filters that use CUPS so
-long as source code is made available under the GPL. </LI>
-</UL>
-<P>What this license <B>does not</B> allow you to do is make changes or
-add features to CUPS and then sell a binary distribution without source
-code. You must provide source for any new drivers, changes, or
-additions to the software, and all code must be provided under the GPL
-or LGPL as appropriate. </P>
-<P>The GNU LGPL relaxes the "link-to" restriction, allowing you to
-develop applications that use the CUPS API library under other licenses
-and/or conditions as appropriate for your application. </P>
-<H3><A NAME="7_1_2">Trademarks</A></H3>
-<P>Easy Software Products has trademarked the Common UNIX Printing
-System, CUPS, and CUPS logo. These names and logos may be used freely
-in any direct port or binary distribution of CUPS. To use them in
-derivative products, please contract Easy Software Products for written
-permission. Our intention is to protect the value of these trademarks
-and ensure that any derivative product meets the same high-quality
-standards as the original. </P>
-<H3><A NAME="7_1_3">Binary Distribution Rights</A></H3>
-<P>Easy Software Products also sells rights to the CUPS source code
-under a binary distribution license for vendors that are unable to
-release source code for their drivers, additions, and modifications to
-CUPS under the GNU GPL and LGPL. For information please contact us at
-the address shown above. </P>
-<P>The Common UNIX Printing System provides a "pstoraster" filter that
-utilizes the GNU GhostScript 5.50 core to convert PostScript files into
-a stream of raster images. For binary distribution licensing of this
-software, please contact: <BLOCKQUOTE> Miles Jones
-<BR> Director of Marketing
-<BR> Artifex Software Inc.
-<BR> 454 Las Gallinas Ave., Suite 108
-<BR> San Rafael, CA 94903 USA
-<BR> Voice: +1.415.492.9861
-<BR> Fax: +1.415.492.9862
-<BR> EMail: <A HREF="mailto:info@arsoft.com">info@arsoft.com</A></BLOCKQUOTE>
-</P>
-<P>The "pdftops" filter is based on the Xpdf 0.90 software. For binary
-distribution licensing of this software, please contact: <BLOCKQUOTE>
- Derek B. Noonburg
-<BR> Email: <A HREF="mailto:derekn@foolabs.com">derekn@foolabs.com</A>
-<BR> WWW: <A HREF="http://www.foolabs.com/xpdf/">
-http://www.foolabs.com/xpdf/</A></BLOCKQUOTE></P>
-<H3><A NAME="7_1_4">Support</A></H3>
-<P>Easy Software Products sells software support for CUPS as well as a
-commercial printing product based on CUPS called ESP Print Pro. You can
-find out more at our web site: </P>
-<UL>
-<PRE>
-<A HREF="http://www.easysw.com">http://www.easysw.com</A>
-</PRE>
-</UL>
-
-<!-- NEW PAGE -->
-<H2><A NAME="7_2">GNU GENERAL PUBLIC LICENSE</A></H2>
-<P>Version 2, June 1991 </P>
-<PRE>
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-
-<!-- NEW PAGE -->
-<H2><A NAME="7_3">GNU LIBRARY GENERAL PUBLIC LICENSE</A></H2>
-<P>Version 2, June 1991 </P>
-<PRE>
-Copyright (C) 1991 Free Software Foundation, Inc.
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-<H4>END OF TERMS AND CONDITIONS</H4>
-<H1 ALIGN="RIGHT"><A NAME="CONSTANTS">B - Constants</A></H1>
-<P>This appendix lists all of the constants that are defined by the
-CUPS API. </P>
-<H2><A NAME="8_1">CUPS Constants</A></H2>
-<H3><A NAME="8_1_1">Version Number</A></H3>
-<P>The <CODE>CUPS_VERSION</CODE> constant is a floating-point number
-representing the API version number. The current version number is
-1.0100 which represents CUPS version 1.1.0. </P>
-<H3><A NAME="8_1_2">Printer Capabilities</A></H3>
-<P>The <CODE>CUPS_PRINTER</CODE> constants represent capability bits
-for printers and classes: </P>
-<UL>
-<LI><CODE>CUPS_PRINTER_LOCAL</CODE> - Is a local printer or class. </LI>
-<LI><CODE>CUPS_PRINTER_REMOTE</CODE> - Is a remote printer or class. </LI>
-<LI><CODE>CUPS_PRINTER_CLASS</CODE> - Is a class. </LI>
-<LI><CODE>CUPS_PRINTER_BW</CODE> - Printer prints in black and white. </LI>
-<LI><CODE>CUPS_PRINTER_COLOR</CODE> - Printer prints in color. </LI>
-<LI><CODE>CUPS_PRINTER_DUPLEX</CODE> - Printer can print double-sided. </LI>
-<LI><CODE>CUPS_PRINTER_STAPLE</CODE> - Printer can staple output. </LI>
-<LI><CODE>CUPS_PRINTER_COPIES</CODE> - Printer can produce multiple
- copies on its own. </LI>
-<LI><CODE>CUPS_PRINTER_COLLATE</CODE> - Printer can collate copies. </LI>
-<LI><CODE>CUPS_PRINTER_PUNCH</CODE> - Printer can punch holes in
-output. </LI>
-<LI><CODE>CUPS_PRINTER_COVER</CODE> - Printer can put covers on output. </LI>
-<LI><CODE>CUPS_PRINTER_BIND</CODE> - Printer can bind output. </LI>
-<LI><CODE>CUPS_PRINTER_SORT</CODE> - Printer can sort output. </LI>
-<LI><CODE>CUPS_PRINTER_SMALL</CODE> - Printer can print on media up to
-9x14 inches. </LI>
-<LI><CODE>CUPS_PRINTER_MEDIUM</CODE> - Printer can print on media from
-9x14 to 18x24 inches. </LI>
-<LI><CODE>CUPS_PRINTER_LARGE</CODE> - Printer can print on media
- larger than 18x24 inches. </LI>
-<LI><CODE>CUPS_PRINTER_VARIABLE</CODE> - Printer can print on variable
-or custom media sizes. </LI>
-<LI><CODE>CUPS_PRINTER_IMPLICIT</CODE> - Is an implicit class. </LI>
-<LI><CODE>CUPS_PRINTER_OPTIONS</CODE> - All of the printer capability
- and option bits. </LI>
-</UL>
-<H3><A NAME="8_1_3">Encodings</A></H3>
-<P>CUPS defines the following character set encoding constants: </P>
-<UL>
-<LI><CODE>CUPS_US_ASCII</CODE> - US ASCII character set. </LI>
-<LI><CODE>CUPS_UTF_8</CODE> - UTF-8 encoding of Unicode. </LI>
-<LI><CODE>CUPS_ISO8859_1</CODE> - ISO-8859-1 character set. </LI>
-<LI><CODE>CUPS_ISO8859_2</CODE> - ISO-8859-2 character set. </LI>
-<LI><CODE>CUPS_ISO8859_3</CODE> - ISO-8859-3 character set. </LI>
-<LI><CODE>CUPS_ISO8859_4</CODE> - ISO-8859-4 character set. </LI>
-<LI><CODE>CUPS_ISO8859_5</CODE> - ISO-8859-5 character set. </LI>
-<LI><CODE>CUPS_ISO8859_6</CODE> - ISO-8859-6 character set. </LI>
-<LI><CODE>CUPS_ISO8859_7</CODE> - ISO-8859-7 character set. </LI>
-<LI><CODE>CUPS_ISO8859_8</CODE> - ISO-8859-8 character set. </LI>
-<LI><CODE>CUPS_ISO8859_9</CODE> - ISO-8859-9 character set. </LI>
-<LI><CODE>CUPS_ISO8859_10</CODE> - ISO-8859-10 character set. </LI>
-<LI><CODE>CUPS_ISO8859_13</CODE> - ISO-8859-13 character set. </LI>
-<LI><CODE>CUPS_ISO8859_14</CODE> - ISO-8859-14 character set. </LI>
-<LI><CODE>CUPS_ISO8859_15</CODE> - ISO-8859-15 character set. </LI>
-<LI><CODE>CUPS_WINDOWS_874</CODE> - Windows code page 874. </LI>
-<LI><CODE>CUPS_WINDOWS_1250</CODE> - Windows code page 1250. </LI>
-<LI><CODE>CUPS_WINDOWS_1251</CODE> - Windows code page 1251. </LI>
-<LI><CODE>CUPS_WINDOWS_1252</CODE> - Windows code page 1252. </LI>
-<LI><CODE>CUPS_WINDOWS_1253</CODE> - Windows code page 1253. </LI>
-<LI><CODE>CUPS_WINDOWS_1254</CODE> - Windows code page 1254. </LI>
-<LI><CODE>CUPS_WINDOWS_1255</CODE> - Windows code page 1255. </LI>
-<LI><CODE>CUPS_WINDOWS_1256</CODE> - Windows code page 1256. </LI>
-<LI><CODE>CUPS_WINDOWS_1257</CODE> - Windows code page 1257. </LI>
-<LI><CODE>CUPS_WINDOWS_1258</CODE> - Windows code page 1258. </LI>
-</UL>
-<H2><A NAME="8_2">HTTP Constants</A></H2>
-<H3><A NAME="8_2_1">Limits</A></H3>
-<P>The following constants define the limits for strings: </P>
-<UL>
-<LI><CODE>HTTP_MAX_BUFFER</CODE> - Size of socket buffer. </LI>
-<LI><CODE>HTTP_MAX_HOST</CODE> - Maximum length of hostname. </LI>
-<LI><CODE>HTTP_MAX_URI</CODE> - Maximum length of URI. </LI>
-<LI><CODE>HTTP_MAX_VALUE</CODE> - Maximum length of field values. </LI>
-</UL>
-<H3><A NAME="8_2_2">Status Codes</A></H3>
-<P>The following status codes can be returned by <CODE>httpUpdate()</CODE>
-: </P>
-<UL>
-<LI><CODE>HTTP_ERROR</CODE> - A network error occurred </LI>
-<LI><CODE>HTTP_CONTINUE</CODE> - Continue response from HTTP proxy </LI>
-<LI><CODE>HTTP_OK</CODE> - OPTIONS/GET/HEAD/POST/TRACE command was
-successful </LI>
-<LI><CODE>HTTP_CREATED</CODE> - PUT command was successful </LI>
-<LI><CODE>HTTP_ACCEPTED</CODE> - DELETE command was successful </LI>
-<LI><CODE>HTTP_NOT_AUTHORITATIVE</CODE> - Information isn't
-authoritative </LI>
-<LI><CODE>HTTP_NO_CONTENT</CODE> - Successful command </LI>
-<LI><CODE>HTTP_RESET_CONTENT</CODE> - Content was reset/recreated </LI>
-<LI><CODE>HTTP_PARTIAL_CONTENT</CODE> - Only a partial file was
-recieved/sent </LI>
-<LI><CODE>HTTP_MULTIPLE_CHOICES</CODE> - Multiple files match request </LI>
-<LI><CODE>HTTP_MOVED_PERMANENTLY</CODE> - Document has moved
-permanently </LI>
-<LI><CODE>HTTP_MOVED_TEMPORARILY</CODE> - Document has moved
-temporarily </LI>
-<LI><CODE>HTTP_SEE_OTHER</CODE> - See this other link... </LI>
-<LI><CODE>HTTP_NOT_MODIFIED</CODE> - File not modified </LI>
-<LI><CODE>HTTP_USE_PROXY</CODE> - Must use a proxy to access this URI </LI>
-<LI><CODE>HTTP_BAD_REQUEST</CODE> - Bad request </LI>
-<LI><CODE>HTTP_UNAUTHORIZED</CODE> - Unauthorized to access host </LI>
-<LI><CODE>HTTP_PAYMENT_REQUIRED</CODE> - Payment required </LI>
-<LI><CODE>HTTP_FORBIDDEN</CODE> - Forbidden to access this URI </LI>
-<LI><CODE>HTTP_NOT_FOUND</CODE> - URI was not found </LI>
-<LI><CODE>HTTP_METHOD_NOT_ALLOWED</CODE> - Method is not allowed </LI>
-<LI><CODE>HTTP_NOT_ACCEPTABLE</CODE> - Not Acceptable </LI>
-<LI><CODE>HTTP_PROXY_AUTHENTICATION</CODE> - Proxy Authentication is
-Required </LI>
-<LI><CODE>HTTP_REQUEST_TIMEOUT</CODE> - Request timed out </LI>
-<LI><CODE>HTTP_CONFLICT</CODE> - Request is self-conflicting </LI>
-<LI><CODE>HTTP_GONE</CODE> - Server has gone away </LI>
-<LI><CODE>HTTP_LENGTH_REQUIRED</CODE> - A content length or encoding is
-required </LI>
-<LI><CODE>HTTP_PRECONDITION</CODE> - Precondition failed </LI>
-<LI><CODE>HTTP_REQUEST_TOO_LARGE</CODE> - Request entity too large </LI>
-<LI><CODE>HTTP_URI_TOO_LONG</CODE> - URI too long </LI>
-<LI><CODE>HTTP_UNSUPPORTED_MEDIATYPE</CODE> - The requested media type
-is unsupported </LI>
-<LI><CODE>HTTP_SERVER_ERROR</CODE> - Internal server error </LI>
-<LI><CODE>HTTP_NOT_IMPLEMENTED</CODE> - Feature not implemented </LI>
-<LI><CODE>HTTP_BAD_GATEWAY</CODE> - Bad gateway </LI>
-<LI><CODE>HTTP_SERVICE_UNAVAILABLE</CODE> - Service is unavailable </LI>
-<LI><CODE>HTTP_GATEWAY_TIMEOUT</CODE> - Gateway connection timed out </LI>
-<LI><CODE>HTTP_NOT_SUPPORTED</CODE> - HTTP version not supported </LI>
-</UL>
-<H3><A NAME="8_2_3">Fields</A></H3>
-<P>The following fields are indices for each of the standard HTTP
-fields in HTTP 1/1: </P>
-<UL>
-<LI><CODE>HTTP_FIELD_ACCEPT_LANGUAGE</CODE> - Accept-Language </LI>
-<LI><CODE>HTTP_FIELD_ACCEPT_RANGES</CODE> - Accept-Ranges </LI>
-<LI><CODE>HTTP_FIELD_AUTHORIZATION</CODE> - Authorization </LI>
-<LI><CODE>HTTP_FIELD_CONNECTION</CODE> - Connection </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_ENCODING</CODE> - Content-Encoding </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_LANGUAGE</CODE> - Content-Language </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_LENGTH</CODE> - Content-Length </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_LOCATION</CODE> - Content-Location </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_MD5</CODE> - Content-MD5 </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_RANGE</CODE> - Content-Range </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_TYPE</CODE> - Content-Type </LI>
-<LI><CODE>HTTP_FIELD_CONTENT_VERSION</CODE> - Content-Version </LI>
-<LI><CODE>HTTP_FIELD_DATE</CODE> - Date </LI>
-<LI><CODE>HTTP_FIELD_HOST</CODE> - Host </LI>
-<LI><CODE>HTTP_FIELD_IF_MODIFIED_SINCE</CODE> - If-Modified-Since </LI>
-<LI><CODE>HTTP_FIELD_IF_UNMODIFIED_SINCE</CODE> - If-Unmodified-Since </LI>
-<LI><CODE>HTTP_FIELD_KEEP_ALIVE</CODE> - Keep-Alive </LI>
-<LI><CODE>HTTP_FIELD_LAST_MODIFIED</CODE> - Last-Modified </LI>
-<LI><CODE>HTTP_FIELD_LINK</CODE> - Link </LI>
-<LI><CODE>HTTP_FIELD_LOCATION</CODE> - Location </LI>
-<LI><CODE>HTTP_FIELD_RANGE</CODE> - Range </LI>
-<LI><CODE>HTTP_FIELD_REFERER</CODE> - Referer </LI>
-<LI><CODE>HTTP_FIELD_RETRY_AFTER</CODE> - Retry-After </LI>
-<LI><CODE>HTTP_FIELD_TRANSFER_ENCODING</CODE> - Transfer-Encoding </LI>
-<LI><CODE>HTTP_FIELD_UPGRADE</CODE> - Upgrade </LI>
-<LI><CODE>HTTP_FIELD_USER_AGENT</CODE> - User-Agent </LI>
-<LI><CODE>HTTP_FIELD_WWW_AUTHENTICATE</CODE> - WWW-Authenticate </LI>
-</UL>
-<H2><A NAME="8_3">IPP Constants</A></H2>
-<H3><A NAME="8_3_1">Limits</A></H3>
-<P>The following constants define array limits for IPP data: </P>
-<UL>
-<LI><CODE>IPP_MAX_NAME</CODE> - Maximum length of an attribute name </LI>
-<LI><CODE>IPP_MAX_VALUES</CODE> - Maximum number of set-of values that
-can be read in a request. </LI>
-</UL>
-<H3><A NAME="8_3_2">Tags</A></H3>
-<UL>
-<LI><CODE>IPP_TAG_ZERO</CODE> - Wildcard tag value for searches; also
- used to separate groups of attributes </LI>
-<LI><CODE>IPP_TAG_OPERATION</CODE> - Tag for values of type operation </LI>
-<LI><CODE>IPP_TAG_JOB</CODE> - Tag for values of type job </LI>
-<LI><CODE>IPP_TAG_END</CODE> - Tag for values of type end </LI>
-<LI><CODE>IPP_TAG_PRINTER</CODE> - Tag for values of type printer </LI>
-<LI><CODE>IPP_TAG_UNSUPPORTED_GROUP</CODE> - Tag for values of type
-unsupported_group </LI>
-<LI><CODE>IPP_TAG_UNSUPPORTED_VALUE</CODE> - Tag for values of type
-unsupported_value </LI>
-<LI><CODE>IPP_TAG_DEFAULT</CODE> - Tag for values of type default </LI>
-<LI><CODE>IPP_TAG_UNKNOWN</CODE> - Tag for values of type unknown </LI>
-<LI><CODE>IPP_TAG_NOVALUE</CODE> - Tag for values of type novalue </LI>
-<LI><CODE>IPP_TAG_NOTSETTABLE</CODE> - Tag for values of type
-notsettable </LI>
-<LI><CODE>IPP_TAG_DELETEATTR</CODE> - Tag for values of type deleteattr </LI>
-<LI><CODE>IPP_TAG_ANYVALUE</CODE> - Tag for values of type anyvalue </LI>
-<LI><CODE>IPP_TAG_INTEGER</CODE> - Tag for values of type integer </LI>
-<LI><CODE>IPP_TAG_BOOLEAN</CODE> - Tag for values of type boolean </LI>
-<LI><CODE>IPP_TAG_ENUM</CODE> - Tag for values of type enum </LI>
-<LI><CODE>IPP_TAG_STRING</CODE> - Tag for values of type string </LI>
-<LI><CODE>IPP_TAG_DATE</CODE> - Tag for values of type date </LI>
-<LI><CODE>IPP_TAG_RESOLUTION</CODE> - Tag for values of type resolution </LI>
-<LI><CODE>IPP_TAG_RANGE</CODE> - Tag for values of type range </LI>
-<LI><CODE>IPP_TAG_COLLECTION</CODE> - Tag for values of type collection </LI>
-<LI><CODE>IPP_TAG_TEXTLANG</CODE> - Tag for values of type textlang </LI>
-<LI><CODE>IPP_TAG_NAMELANG</CODE> - Tag for values of type namelang </LI>
-<LI><CODE>IPP_TAG_TEXT</CODE> - Tag for values of type text </LI>
-<LI><CODE>IPP_TAG_NAME</CODE> - Tag for values of type name </LI>
-<LI><CODE>IPP_TAG_KEYWORD</CODE> - Tag for values of type keyword </LI>
-<LI><CODE>IPP_TAG_URI</CODE> - Tag for values of type uri </LI>
-<LI><CODE>IPP_TAG_URISCHEME</CODE> - Tag for values of type urischeme </LI>
-<LI><CODE>IPP_TAG_CHARSET</CODE> - Tag for values of type charset </LI>
-<LI><CODE>IPP_TAG_LANGUAGE</CODE> - Tag for values of type language </LI>
-<LI><CODE>IPP_TAG_MIMETYPE</CODE> - Tag for values of type mimetype </LI>
-</UL>
-<H3><A NAME="8_3_3">Resolution Units</A></H3>
-<P>The <CODE>IPP_RES_PER_INCH</CODE> and <CODE>IPP_RES_PER_CM</CODE>
- constants specify dots per inch and dots per centimeter, respectively. </P>
-<H3><A NAME="8_3_4">Finishings</A></H3>
-<P>The finishing values specify special finishing operations to be
-performed on the job. </P>
-<UL>
-<LI><CODE>IPP_FINISH_NONE</CODE> - Do no finishing </LI>
-<LI><CODE>IPP_FINISH_STAPLE</CODE> - Staple the job </LI>
-<LI><CODE>IPP_FINISH_PUNCH</CODE> - Punch the job </LI>
-<LI><CODE>IPP_FINISH_COVER</CODE> - Cover the job </LI>
-<LI><CODE>IPP_FINISH_BIND</CODE> - Bind the job </LI>
-</UL>
-<H3><A NAME="8_3_5">Orientations</A></H3>
-<P>The orientation values specify the orientation of the job. </P>
-<UL>
-<LI><CODE>IPP_PORTRAIT</CODE> - No rotation </LI>
-<LI><CODE>IPP_LANDSCAPE</CODE> - 90 degrees counter-clockwise </LI>
-<LI><CODE>IPP_REVERSE_LANDSCAPE</CODE> - 90 degrees clockwise </LI>
-<LI><CODE>IPP_REVERSE_PORTRAIT</CODE> - 180 degrees </LI>
-</UL>
-<H3><A NAME="8_3_6">Qualities</A></H3>
-<P>The quality values specify the desired quality of the print. </P>
-<UL>
-<LI><CODE>IPP_QUALITY_DRAFT</CODE> - Draft quality </LI>
-<LI><CODE>IPP_QUALITY_NORMAL</CODE> - Normal quality </LI>
-<LI><CODE>IPP_QUALITY_HIGH</CODE> - High quality </LI>
-</UL>
-<H3><A NAME="8_3_7">Job States</A></H3>
-<P>The job state values are used to represent the current job state. </P>
-<UL>
-<LI><CODE>IPP_JOB_PENDING</CODE> - Job is pending </LI>
-<LI><CODE>IPP_JOB_HELD</CODE> - Job is held </LI>
-<LI><CODE>IPP_JOB_PROCESSING</CODE> - Job is processing </LI>
-<LI><CODE>IPP_JOB_STOPPED</CODE> - Job is stopped </LI>
-<LI><CODE>IPP_JOB_CANCELLED</CODE> - Job is cancelled </LI>
-<LI><CODE>IPP_JOB_ABORTED</CODE> - Job is aborted </LI>
-<LI><CODE>IPP_JOB_COMPLETED</CODE> - Job is completed </LI>
-</UL>
-<H3><A NAME="8_3_8">Printer States</A></H3>
-<P>The printer state values are used to represent the current printer
-state. </P>
-<UL>
-<LI><CODE>IPP_PRINTER_IDLE</CODE> - Printer is idle </LI>
-<LI><CODE>IPP_PRINTER_PROCESSING</CODE> - Printer is processing </LI>
-<LI><CODE>IPP_PRINTER_STOPPED</CODE> - Printer is stopped </LI>
-</UL>
-<H3><A NAME="8_3_9">Operations</A></H3>
-<P>The operation values represent the available IPP operations. </P>
-<UL>
-<LI><CODE>IPP_PRINT_JOB</CODE> - Print a file </LI>
-<LI><CODE>IPP_PRINT_URI</CODE> - Print a URI </LI>
-<LI><CODE>IPP_VALIDATE_JOB</CODE> - Validate job attributes </LI>
-<LI><CODE>IPP_CREATE_JOB</CODE> - Create a new job </LI>
-<LI><CODE>IPP_SEND_DOCUMENT</CODE> - Send a document to a job </LI>
-<LI><CODE>IPP_SEND_URI</CODE> - Send a URI to a job </LI>
-<LI><CODE>IPP_CANCEL_JOB</CODE> - Cancel a job </LI>
-<LI><CODE>IPP_GET_JOB_ATTRIBUTES</CODE> - Get job attributes </LI>
-<LI><CODE>IPP_GET_JOBS</CODE> - Get a list of all jobs </LI>
-<LI><CODE>IPP_GET_PRINTER_ATTRIBUTES</CODE> - Get printer attributes </LI>
-<LI><CODE>IPP_HOLD_JOB</CODE> - Hold a pending job </LI>
-<LI><CODE>IPP_RELEASE_JOB</CODE> - Release a held job </LI>
-<LI><CODE>IPP_RESTART_JOB</CODE> - Restart a completed job </LI>
-<LI><CODE>IPP_PAUSE_PRINTER</CODE> - Pause a printer </LI>
-<LI><CODE>IPP_RESUME_PRINTER</CODE> - Restart a paused printer </LI>
-<LI><CODE>IPP_PURGE_JOBS</CODE> - Purge jobs from the queue </LI>
-<LI><CODE>IPP_SET_PRINTER_ATTRIBUTES</CODE> - Set printer attributes </LI>
-<LI><CODE>IPP_SET_JOB_ATTRIBUTES</CODE> - Set job attributes </LI>
-<LI><CODE>IPP_GET_PRINTER_SUPPORTED_VALUES</CODE> - Get printer
-supported values </LI>
-<LI><CODE>CUPS_GET_DEFAULT</CODE> - Get the default destination </LI>
-<LI><CODE>CUPS_GET_PRINTERS</CODE> - Get a list of all printers </LI>
-<LI><CODE>CUPS_ADD_PRINTER</CODE> - Add or modify a printer </LI>
-<LI><CODE>CUPS_DELETE_PRINTER</CODE> - Delete a printer </LI>
-<LI><CODE>CUPS_GET_CLASSES</CODE> - Get a list of all classes </LI>
-<LI><CODE>CUPS_ADD_CLASS</CODE> - Add or modify a class </LI>
-<LI><CODE>CUPS_DELETE_CLASS</CODE> - Delete a class </LI>
-<LI><CODE>CUPS_ACCEPT_JOBS</CODE> - Accept jobs on a printer or class </LI>
-<LI><CODE>CUPS_REJECT_JOBS</CODE> - Reject jobs on a printer or class </LI>
-<LI><CODE>CUPS_SET_DEFAULT</CODE> - Set the default destination </LI>
-<LI><CODE>CUPS_GET_DEVICES</CODE> - Get a list of all devices </LI>
-<LI><CODE>CUPS_GET_PPDS</CODE> - Get a list of all PPDs </LI>
-<LI><CODE>CUPS_MOVE_JOB</CODE> - Move a job to a new destination </LI>
-</UL>
-<H3><A NAME="8_3_10">Status Codes</A></H3>
-<P>Status codes are returned by all IPP requests. </P>
-<UL>
-<LI><CODE>IPP_OK</CODE> - Request completed with no errors </LI>
-<LI><CODE>IPP_OK_SUBST</CODE> - Request completed but some attribute
- values were substituted </LI>
-<LI><CODE>IPP_OK_CONFLICT</CODE> - Request completed but some
-attributes conflicted </LI>
-<LI><CODE>IPP_BAD_REQUEST</CODE> - The request was bad </LI>
-<LI><CODE>IPP_FORBIDDEN</CODE> - You don't have access to the resource </LI>
-<LI><CODE>IPP_NOT_AUTHENTICATED</CODE> - You are not authenticated for
- the resource </LI>
-<LI><CODE>IPP_NOT_AUTHORIZED</CODE> - You not authorized to access the
-resource </LI>
-<LI><CODE>IPP_NOT_POSSIBLE</CODE> - The requested operation cannot be
- completed </LI>
-<LI><CODE>IPP_TIMEOUT</CODE> - A timeout occurred </LI>
-<LI><CODE>IPP_NOT_FOUND</CODE> - The resource was not found </LI>
-<LI><CODE>IPP_GONE</CODE> - The resource has gone away </LI>
-<LI><CODE>IPP_REQUEST_ENTITY</CODE> - The request was too large </LI>
-<LI><CODE>IPP_REQUEST_VALUE</CODE> - The request contained a value
- that was unknown to the server </LI>
-<LI><CODE>IPP_DOCUMENT_FORMAT</CODE> - The document format is not
- supported by the server </LI>
-<LI><CODE>IPP_ATTRIBUTES</CODE> - Required attributes are missing </LI>
-<LI><CODE>IPP_URI_SCHEME</CODE> - The URI scheme is not supported </LI>
-<LI><CODE>IPP_CHARSET</CODE> - The charset is not supported </LI>
-<LI><CODE>IPP_CONFLICT</CODE> - One or more attributes conflict </LI>
-<LI><CODE>IPP_COMPRESSION_NOT_SUPPORTED</CODE> - The specified
- compression is not supported </LI>
-<LI><CODE>IPP_COMPRESSION_ERROR</CODE> - The compressed data contained
-an error </LI>
-<LI><CODE>IPP_DOCUMENT_FORMAT_ERROR</CODE> - The document data
- contained an error in it </LI>
-<LI><CODE>IPP_DOCUMENT_ACCESS_ERROR</CODE> - The remote document could
-not be accessed </LI>
-<LI><CODE>IPP_INTERNAL_ERROR</CODE> - The server encountered an
- internal error </LI>
-<LI><CODE>IPP_OPERATION_NOT_SUPPORTED</CODE> - The requested operation
- is not supported </LI>
-<LI><CODE>IPP_SERVICE_UNAVAILABLE</CODE> - The requested service is
-unavailable </LI>
-<LI><CODE>IPP_VERSION_NOT_SUPPORTED</CODE> - The IPP request version
-is not supported </LI>
-<LI><CODE>IPP_DEVICE_ERROR</CODE> - The output device encountered an
-error </LI>
-<LI><CODE>IPP_TEMPORARY_ERROR</CODE> - A temporary error occurred </LI>
-<LI><CODE>IPP_NOT_ACCEPTING</CODE> - The destination is not accepting
- jobs </LI>
-<LI><CODE>IPP_PRINTER_BUSY</CODE> - The destination is busy </LI>
-<LI><CODE>IPP_ERROR_JOB_CANCELLED</CODE> - The requested job has been
- cancelled </LI>
-<LI><CODE>IPP_MULTIPLE_JOBS_NOT_SUPPORTED</CODE> - The server does not
-support multiple jobs </LI>
-</UL>
-<H2><A NAME="8_4">PPD Constants</A></H2>
-<H3><A NAME="8_4_1">PPD Format Version</A></H3>
-<P>The <CODE>PPD_VERSION</CODE> constant defines a floating point
-number representing the newest format version that is supported by
-CUPS, currently 4.3. </P>
-<H3><A NAME="8_4_2">PPD User-Interface Types</A></H3>
-<P>Each printer option has a type associated with it: </P>
-<UL>
-<LI><CODE>PPD_UI_BOOLEAN</CODE> - The user can turn this option on or
-off </LI>
-<LI><CODE>PPD_UI_PICKONE</CODE> - The user can choose one option value
- to use. </LI>
-<LI><CODE>PPD_UI_PICKMANY</CODE> - The user can choose zero or more
- option values. </LI>
-</UL>
-<H3><A NAME="8_4_3">PPD Sections</A></H3>
-<P>Some options must be output before others, or in different sections
-of the output document. The <CODE>ppd_section_t</CODE> enumeration
-defines which section the option must be output in: </P>
-<UL>
-<LI><CODE>PPD_ORDER_ANY</CODE> - The option can be output in any of
- the document, page, or prolog sections of the document </LI>
-<LI><CODE>PPD_ORDER_DOCUMENT</CODE> - The option must be output in the
-DocumentSetup section of the document </LI>
-<LI><CODE>PPD_ORDER_EXIT</CODE> - The option must be output before the
-document </LI>
-<LI><CODE>PPD_ORDER_JCL</CODE> - The option must be output in the job
-control section of the document </LI>
-<LI><CODE>PPD_ORDER_PAGE</CODE> - The option must be output in the
- PageSetup section of the document </LI>
-<LI><CODE>PPD_ORDER_PROLOG</CODE> - The option must be output in the
- Prolog section of the document </LI>
-</UL>
-<H3><A NAME="8_4_4">PPD Colorspaces</A></H3>
-<P>Each printer has a default colorspace: </P>
-<UL>
-<LI><CODE>PPD_CS_CMYK</CODE> - The printer uses CMYK colors by default </LI>
-<LI><CODE>PPD_CS_CMY</CODE> - The printer uses CMY colors by default </LI>
-<LI><CODE>PPD_CS_GRAY</CODE> - The printer uses grayscale by default </LI>
-<LI><CODE>PPD_CS_RGB</CODE> - The printer uses RGB colors by default </LI>
-<LI><CODE>PPD_CS_RGBK</CODE> - The printer uses RGBK colors by default </LI>
-<LI><CODE>PPD_CS_N</CODE> - The printer uses a DeviceN colorspace by
-default </LI>
-</UL>
-<H2><A NAME="8_5">Raster Constants</A></H2>
-<H3><A NAME="8_5_1">Raster Sync Words</A></H3>
-<P>The <CODE>CUPS_RASTER_SYNC</CODE> and <CODE>CUPS_RASTER_REVSYNC</CODE>
- constants define the standard sync words at the beginning of each CUPS
-raster file. </P>
-<H3><A NAME="8_5_2">Raster Stream Modes</A></H3>
-<P>The <CODE>CUPS_RASTER_READ</CODE> and <CODE>CUPS_RASTER_WRITE</CODE>
- constants are used with the <A HREF="#cupsRasterOpen"><CODE>
-cupsRasterOpen()</CODE></A> function to specify a stream for reading or
-writing. </P>
-<H3><A NAME="8_5_3">Raster Boolean Constants</A></H3>
-<P>The <CODE>CUPS_FALSE</CODE> and <CODE>CUPS_TRUE</CODE> constants
-represent boolean values in the page header. </P>
-<H3><A NAME="8_5_4">Raster Jog Values</A></H3>
-<P>The <CODE>cups_jog_t</CODE> enumeration defines constants for the
-Jog page device dictionary variable: </P>
-<UL>
-<LI><CODE>CUPS_JOG_NONE</CODE> - Do no jogging </LI>
-<LI><CODE>CUPS_JOG_FILE</CODE> - Jog pages after each file </LI>
-<LI><CODE>CUPS_JOG_JOB</CODE> - Jog pages after each job </LI>
-<LI><CODE>CUPS_JOG_SET</CODE> - Jog pages after each set of jobs </LI>
-</UL>
-<H3><A NAME="8_5_5">Raster Orientation Values</A></H3>
-<P>The <CODE>cups_orient_t</CODE> enumeration defines constants for the
-Orientation page device dictionary variable: </P>
-<UL>
-<LI><CODE>CUPS_ORIENT_0</CODE> - Portrait orientation </LI>
-<LI><CODE>CUPS_ORIENT_90</CODE> - Landscape orientation </LI>
-<LI><CODE>CUPS_ORIENT_180</CODE> - Reverse-portrait orientation </LI>
-<LI><CODE>CUPS_ORIENT_270</CODE> - Reverse-landscape orientation </LI>
-</UL>
-<H3><A NAME="8_5_6">Raster CutMedia Values</A></H3>
-<P>The <CODE>cups_cut_t</CODE> enumeration defines constants for the
-CutMedia page device dictionary variable: </P>
-<UL>
-<LI><CODE>CUPS_CUT_NONE</CODE> - Do no jogging </LI>
-<LI><CODE>CUPS_CUT_FILE</CODE> - Cut pages after each file </LI>
-<LI><CODE>CUPS_CUT_JOB</CODE> - Cut pages after each job </LI>
-<LI><CODE>CUPS_CUT_SET</CODE> - Cut pages after each set of jobs </LI>
-<LI><CODE>CUPS_CUT_PAGE</CODE> - Cut each page </LI>
-</UL>
-<H3><A NAME="8_5_7">Raster AdvanceMedia Values</A></H3>
-<P>The <CODE>cups_advance_t</CODE> enumeration defines constants for
-the AdvanceMedia page device dictionary variable: </P>
-<UL>
-<LI><CODE>CUPS_ADVANCE_NONE</CODE> - Do no jogging </LI>
-<LI><CODE>CUPS_ADVANCE_FILE</CODE> - Advance media after each file </LI>
-<LI><CODE>CUPS_ADVANCE_JOB</CODE> - Advance media after each job </LI>
-<LI><CODE>CUPS_ADVANCE_SET</CODE> - Advance media after each set of
-jobs </LI>
-<LI><CODE>CUPS_ADVANCE_PAGE</CODE> - Advance media for each page </LI>
-</UL>
-<H3><A NAME="8_5_8">Raster LeadingEdge Values</A></H3>
-<P>The <CODE>cups_edge_t</CODE> enumeration defines constants for the
-LeadingEdge page device dictionary variable: </P>
-<UL>
-<LI><CODE>CUPS_EDGE_TOP</CODE> - The top of the media is the leading
- edge </LI>
-<LI><CODE>CUPS_EDGE_RIGHT</CODE> - The right of the media is the
-leading edge </LI>
-<LI><CODE>CUPS_EDGE_BOTTOM</CODE> - The bottom of the media is the
- leading edge </LI>
-<LI><CODE>CUPS_EDGE_LEFT</CODE> - The left of the media is the leading
- edge </LI>
-</UL>
-<H3><A NAME="8_5_9">Raster Color Order Values</A></H3>
-<P>The <CODE>cups_order_t</CODE> enumeration defines the possible color
-value orderings: </P>
-<UL>
-<LI><CODE>CUPS_ORDER_CHUNKED</CODE> - CMYK CMYK CMYK </LI>
-<LI><CODE>CUPS_ORDER_BANDED</CODE> - CCC MMM YYY KKK </LI>
-<LI><CODE>CUPS_ORDER_PLANAR</CODE> - CCC ... MMM ... YYY ... KKK ... </LI>
-</UL>
-<H3><A NAME="8_5_10">Raster Colorspace Values</A></H3>
-<P>The <CODE>cups_cspace_t</CODE> enumeration defines the possible
-colorspaces: </P>
-<UL>
-<LI><CODE>CUPS_CSPACE_W</CODE> - White (luminance) </LI>
-<LI><CODE>CUPS_CSPACE_RGB</CODE> - Red, green, blue </LI>
-<LI><CODE>CUPS_CSPACE_RGBA</CODE> - Red, green, blue, alpha </LI>
-<LI><CODE>CUPS_CSPACE_K</CODE> - Black </LI>
-<LI><CODE>CUPS_CSPACE_CMY</CODE> - Cyan, magenta, yellow </LI>
-<LI><CODE>CUPS_CSPACE_YMC</CODE> - Yellow, magenta, cyan </LI>
-<LI><CODE>CUPS_CSPACE_CMYK</CODE> - Cyan, magenta, yellow, black </LI>
-<LI><CODE>CUPS_CSPACE_YMCK</CODE> - Yellow, magenta, cyan, black </LI>
-<LI><CODE>CUPS_CSPACE_KCMY</CODE> - Black, cyan, magenta, yellow </LI>
-<LI><CODE>CUPS_CSPACE_KCMYcm</CODE> - Black, cyan, magenta, yellow,
- light cyan, light magenta </LI>
-<LI><CODE>CUPS_CSPACE_GMCK</CODE> - Metallic yellow (gold), metallic
-magenta, metallic cyan, black </LI>
-<LI><CODE>CUPS_CSPACE_GMCS</CODE> - Metallic yellow (gold), metallic
-magenta, metallic cyan, metallic grey (silver) </LI>
-<LI><CODE>CUPS_CSPACE_WHITE</CODE> - White pigment (black as white
-pigment) </LI>
-<LI><CODE>CUPS_CSPACE_GOLD</CODE> - Gold foil (black as gold foil) </LI>
-<LI><CODE>CUPS_CSPACE_SILVER</CODE> - Silver foil (black as silver
-foil) </LI>
-</UL>
-<H1 ALIGN="RIGHT"><A NAME="STRUCTURES">C - Structures</A></H1>
-<P>This appendix describes all of the structures that are defined by
-the CUPS API. </P>
-<H2><A NAME="9_1">Raster Structures</A></H2>
-<H3><A NAME="9_1_1">Raster Page Header</A></H3>
-<P>The raster page header consists of the PostScript page device
-dictionary for the page:
-<CENTER>
-<TABLE BORDER="1" WIDTH="90%">
-<TR><TH>Member</TH><TH>Type</TH><TH>Description</TH></TR>
-<TR><TD>MediaClass</TD><TD>char[64]</TD><TD>The media class name</TD></TR>
-<TR><TD>MediaColor</TD><TD>char[64]</TD><TD>The media color name</TD></TR>
-<TR><TD>MediaType</TD><TD>char[64]</TD><TD>The media type name</TD></TR>
-<TR><TD>OutputType</TD><TD>char[64]</TD><TD>The output type name</TD></TR>
-<TR><TD>AdvanceDistance</TD><TD>unsigned</TD><TD>The distance to
-advance the media in points</TD></TR>
-<TR><TD>AdvanceMedia</TD><TD>cups_adv_t</TD><TD>When to advance the
-media</TD></TR>
-<TR><TD>Collate</TD><TD>cups_bool_t</TD><TD>Whether or not to produce
-collated copies</TD></TR>
-<TR><TD>CutMedia</TD><TD>cups_cut_t</TD><TD>When to cut the media</TD></TR>
-<TR><TD>Duplex</TD><TD>cups_bool_t</TD><TD>Whether or not to print on
-both sides of the paper</TD></TR>
-<TR><TD>HWResolution</TD><TD>unsigned[2]</TD><TD>The resolution of the
-page image in pixels per inch; the HWResolution[0] represents the
-horizontal resolution and HWResolution[1] represents the vertical
-resolution</TD></TR>
-<TR><TD>ImagingBoundingBox</TD><TD>unsigned[4]</TD><TD>The bounding box
-for the page in points; the elements represent the left, bottom,
-right, and top coordinates of the imaged area (if 0 then the whole
-page is imaged)</TD></TR>
-<TR><TD>InsertSheet</TD><TD>cups_bool_t</TD><TD>Whether or not to
-insert a sheet before this page</TD></TR>
-<TR><TD>Jog</TD><TD>cups_jog_t</TD><TD>When to jog copies of the page</TD>
-</TR>
-<TR><TD>LeadingEdge</TD><TD>cups_edge_t</TD><TD>The leading edge of the
-page</TD></TR>
-<TR><TD>Margins</TD><TD>unsigned[2]</TD><TD>The lower-lefthand margin
-of the page in points</TD></TR>
-<TR><TD>ManualFeed</TD><TD>cups_bool_t</TD><TD>Whether or not to
-manually feed the page</TD></TR>
-<TR><TD>MediaPosition</TD><TD>unsigned</TD><TD>The input slot number to
-use</TD></TR>
-<TR><TD>MediaWeight</TD><TD>unsigned</TD><TD>The weight of the output
-media in grams/m<SUP>2</SUP></TD></TR>
-<TR><TD>MirrorPrint</TD><TD>cups_bool_t</TD><TD>Whether or not to
-mirror the print</TD></TR>
-<TR><TD>NegativePrint</TD><TD>cups_bool_t</TD><TD>Whether or not to
-invert the print</TD></TR>
-<TR><TD>NumCopies</TD><TD>unsigned</TD><TD>The number of copies to
-produce</TD></TR>
-<TR><TD>Orientation</TD><TD>cups_orient_t</TD><TD>The orientation of
-the page image</TD></TR>
-<TR><TD>OutputFaceUp</TD><TD>cups_bool_t</TD><TD>Whether or not to
-output the page face up</TD></TR>
-<TR><TD>PageSize</TD><TD>unsigned[2]</TD><TD>The width and height of
-the page in points</TD></TR>
-<TR><TD>Separations</TD><TD>cups_bool_t</TD><TD>Whether or not to
-output separations</TD></TR>
-<TR><TD>TraySwitch</TD><TD>cups_bool_t</TD><TD>Whether or not to
-automatically switch trays for the requested media size/type</TD></TR>
-<TR><TD>Tumble</TD><TD>cups_bool_t</TD><TD>Whether or not to rotate the
-back side of the page</TD></TR>
-<TR><TD>cupsWidth</TD><TD>unsigned</TD><TD>The width of the page image
-in pixels</TD></TR>
-<TR><TD>cupsHeight</TD><TD>unsigned</TD><TD>The height of the page
-image in pixels</TD></TR>
-<TR><TD>cupsMediaType</TD><TD>unsigned</TD><TD>The device-specific
-media type code</TD></TR>
-<TR><TD>cupsBitsPerColor</TD><TD>unsigned</TD><TD>The number of bits
-per color</TD></TR>
-<TR><TD>cupsBitsPerPixel</TD><TD>unsigned</TD><TD>The number of bits
-per pixel</TD></TR>
-<TR><TD>cupsBytesPerLine</TD><TD>unsigned</TD><TD>The number of bytes
-per line of image data</TD></TR>
-<TR><TD>cupsColorOrder</TD><TD>cups_order_t</TD><TD>The order of color
-values</TD></TR>
-<TR><TD>cupsColorSpace</TD><TD>cups_cspace_t</TD><TD>The type of color
-values</TD></TR>
-<TR><TD>cupsCompression</TD><TD>unsigned</TD><TD>The device-specific
-compression code</TD></TR>
-<TR><TD>cupsRowCount</TD><TD>unsigned</TD><TD>The device-specific row
-count</TD></TR>
-<TR><TD>cupsRowFeed</TD><TD>unsigned</TD><TD>The device-specific row
-feed</TD></TR>
-<TR><TD>cupsRowStep</TD><TD>unsigned</TD><TD>The device-specific row
-step</TD></TR>
-</TABLE>
-</CENTER>
-</P>
-<H1 ALIGN="RIGHT"><A HREF="FUNCTIONS" NAME="10">D - Functions</A></H1>
-<P>This appendix provides a reference for all of the CUPS API
-functions.
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsAddOption">cupsAddOption()</A></H2>
-<H3><A NAME="10_1_1">Usage</A></H3>
-<PRE>
-int
-cupsAddOption(const char *name,
- const char *value,
- int num_options,
- cups_option_t **options);
-</PRE>
-<H3><A NAME="10_1_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>name</TD><TD>The name of the option.</TD></TR>
-<TR><TD>value</TD><TD>The value of the option.</TD></TR>
-<TR><TD>num_options</TD><TD>Number of options currently in the array.</TD>
-</TR>
-<TR><TD>options</TD><TD>Pointer to the options array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_1_3">Returns</A></H3>
-<P>The new number of options. </P>
-<H3><A NAME="10_1_4">Description</A></H3>
-<P><CODE>cupsAddOption()</CODE> adds an option to the specified array. </P>
-<H3><A NAME="10_1_5">Example</A></H3>
-<PRE>
-#include <cups.h>
-
-...
-
-/* Declare the options array */
-int num_options;
-<A HREF="#cups_option_t">cups_option_t</A> *options;
-
-/* Initialize the options array */
-num_options = 0;
-options = (cups_option_t *)0;
-
-/* Add options using cupsAddOption() */
-num_options = cupsAddOption("media", "letter", num_options, &options);
-num_options = cupsAddOption("resolution", "300dpi", num_options, &options);
-</PRE>
-<H3><A NAME="10_1_6">See Also</A></H3>
-<A HREF="#cupsFreeOptions"><CODE> cupsFreeOptions()</CODE></A>, <A HREF="#cupsGetOption">
-<CODE>cupsGetOption()</CODE></A>, <A HREF="#cupsParseOptions"><CODE>
-cupsParseOptions()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="cupsCancelJob">cupsCancelJob()</A></H2>
-<H3><A NAME="10_2_1">Usage</A></H3>
-<PRE>
-int
-cupsCancelJob(const char *dest,
- int job);
-</PRE>
-<H3><A NAME="10_2_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>dest</TD><TD>Printer or class name</TD></TR>
-<TR><TD>job</TD><TD>Job ID</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_2_3">Returns</A></H3>
-<P>1 on success, 0 on failure. On failure the error can be found by
-calling <A HREF="#cupsLastError"><CODE>cupsLastError()</CODE></A>. </P>
-<H3><A NAME="10_2_4">Description</A></H3>
-<P><CODE>cupsCancelJob()</CODE> cancels the specifies job. </P>
-<H3><A NAME="10_2_5">Example</A></H3>
-<PRE>
-#include <cups.h>
-
-cupsCancelJob("LaserJet", 1);
-</PRE>
-<H3><A NAME="10_2_6">See Also</A></H3>
-<P><A HREF="#cupsLastError"><CODE> cupsLastError()</CODE></A>, <A HREF="#cupsPrintFile">
-<CODE>cupsPrintFile()</CODE></A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsDoFileRequest">cupsDoFileRequest()</A></H2>
-<H3><A NAME="10_3_1">Usage</A></H3>
-<PRE>
-ipp_t *
-cupsDoFileRequest(http_t *http,
- ipp_t *request,
- const char *resource,
- const char *filename);
-</PRE>
-<H3><A NAME="10_3_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>HTTP connection to server.</TD></TR>
-<TR><TD>request</TD><TD>IPP request data.</TD></TR>
-<TR><TD>resource</TD><TD>HTTP resource name for POST.</TD></TR>
-<TR><TD>filename</TD><TD>File to send with POST request (<CODE>NULL</CODE>
- pointer if none.)</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_3_3">Returns</A></H3>
-<P>IPP response data or <CODE>NULL</CODE> if the request fails. On
-failure the error can be found by calling <A HREF="#cupsLastError"><CODE>
-cupsLastError()</CODE></A>. </P>
-<H3><A NAME="10_3_4">Description</A></H3>
-<P><CODE>cupsDoFileRequest()</CODE> does a HTTP POST request and
-provides the IPP request and optionally the contents of a file to the
-IPP server. It also handles resubmitting the request and performing
-password authentication as needed. </P>
-<H3><A NAME="10_3_5">Example</A></H3>
-<PRE>
-#include <cups.h>
-
-<A HREF="#http_t">http_t</A> *http;
-<A HREF="#cups_lang_t">cups_lang_t</A> *language;
-<A HREF="#ipp_t">ipp_t</A> *request;
-ipp_t *response;
-
-...
-
-/* Get the default language */
-language = <A HREF="#cupsLangDefault">cupsLangDefault()</A>;
-
-/* Create a new IPP request */
-request = <A HREF="#ippNew">ippNew()</A>;
-
-request->request.op.operation_id = IPP_PRINT_FILE;
-request->request.op.request_id = 1;
-
-/* Add required attributes */
-<A HREF="#ippAddString">ippAddString</A>(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
- "attributes-charset", NULL, <A HREF="#cupsLangEncoding">cupsLangEncoding</A>(language));
-
-ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
- "attributes-natural-language", NULL,
- language != NULL ? language->language : "C");
-
-ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri",
- NULL, "ipp://hostname/resource");
-
-ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
- NULL, <A HREF="#cupsUser">cupsUser()</A>);
-
-/* Do the request... */
-response = cupsDoFileRequest(http, request, "/resource", "filename.txt");
-</PRE>
-<H3><A NAME="10_3_6">See Also</A></H3>
-<P><A HREF="#cupsLangDefault"><CODE> cupsLangDefault()</CODE></A>, <A HREF="#cupsLangEncoding">
-<CODE>cupsLangEncoding()</CODE></A>, <A HREF="#cupsUser"><CODE>
-cupsUser()</CODE></A>, <A HREF="#httpConnect"><CODE>httpConnect()</CODE></A>
-, <A HREF="#ippAddString"><CODE>ippAddString()</CODE></A>, <A HREF="#ippNew">
-<CODE>ippNew()</CODE></A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsDoRequest">cupsDoRequest()</A></H2>
-<H3><A NAME="10_4_1">Usage</A></H3>
-<PRE>
-ipp_t *
-cupsDoRequest(http_t *http,
- ipp_t *request,
- const char *resource);
-</PRE>
-<H3><A NAME="10_4_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>HTTP connection to server.</TD></TR>
-<TR><TD>request</TD><TD>IPP request data.</TD></TR>
-<TR><TD>resource</TD><TD>HTTP resource name for POST.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_4_3">Returns</A></H3>
-<P>IPP response data or <CODE>NULL</CODE> if the request fails. On
-failure the error can be found by calling <A HREF="#cupsLastError"><CODE>
-cupsLastError()</CODE></A>. </P>
-<H3><A NAME="10_4_4">Description</A></H3>
-<P><CODE>cupsDoRequest()</CODE> does a HTTP POST request and provides
-the IPP request to the IPP server. It also handles resubmitting the
-request and performing password authentication as needed. </P>
-<H3><A NAME="10_4_5">Example</A></H3>
-<PRE>
-#include <cups.h>
-
-<A HREF="#http_t">http_t</A> *http;
-<A HREF="#cups_lang_t">cups_lang_t</A> *language;
-<A HREF="#ipp_t">ipp_t</A> *request;
-ipp_t *response;
-
-...
-
-/* Get the default language */
-language = <A HREF="#cupsLangDefault">cupsLangDefault()</A>;
-
-/* Create a new IPP request */
-request = <A HREF="#ippNew">ippNew()</A>;
-
-request->request.op.operation_id = IPP_GET_PRINTER_ATTRIBUTES;
-request->request.op.request_id = 1;
-
-/* Add required attributes */
-<A HREF="#ippAddString">ippAddString</A>(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
- "attributes-charset", NULL, <A HREF="#cupsLangEncoding">cupsLangEncoding</A>(language));
-
-ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
- "attributes-natural-language", NULL,
- language != NULL ? language->language : "C");
-
-ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri",
- NULL, "ipp://hostname/resource");
-
-/* Do the request... */
-response = cupsDoRequest(http, request, "/resource");
-</PRE>
-<H3><A NAME="10_4_6">See Also</A></H3>
-<P><A HREF="#cupsLangDefault"><CODE> cupsLangDefault()</CODE></A>, <A HREF="#cupsLangEncoding">
-<CODE>cupsLangEncoding()</CODE></A>, <A HREF="#cupsUser"><CODE>
-cupsUser()</CODE></A>, <A HREF="#httpConnect"><CODE>httpConnect()</CODE></A>
-, <A HREF="#ippAddString"><CODE>ippAddString()</CODE></A>, <A HREF="#ippNew">
-<CODE>ippNew()</CODE></A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsFreeOptions">cupsFreeOptions()</A></H2>
-<H3><A NAME="10_5_1">Usage</A></H3>
-<PRE>
-void
-cupsFreeOptions(int num_options,
- cups_option_t *options);
-
-</PRE>
-<H3><A NAME="10_5_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>num_options</TD><TD>Number of options in array.</TD></TR>
-<TR><TD>options</TD><TD>Pointer to options array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_5_3">Description</A></H3>
-<P><CODE>cupsFreeOptions()</CODE> frees all memory associated with the
-option array specified. </P>
-<H3><A NAME="10_5_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-int num_options;
-cups_option_t *options;
-
-...
-
-cupsFreeOptions(num_options, options);
-</PRE>
-<H3><A NAME="10_5_5">See Also</A></H3>
-<P><A HREF="#cupsAddOption"> cupsAddOption()</A>, <A HREF="#cupsGetOption">
-cupsGetOption()</A>, <A HREF="#cupsMarkOptions">cupsMarkOptions()</A>, <A
-HREF="#cupsParseOptions">cupsParseOptions()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsGetClasses">cupsGetClasses()</A></H2>
-<H3><A NAME="10_6_1">Usage</A></H3>
-<PRE>
-int
-cupsGetClasses(char ***classes);
-</PRE>
-<H3><A NAME="10_6_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>classes</TD><TD>Pointer to character pointer array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_6_3">Returns</A></H3>
-<P>The number of printer classes available. </P>
-<H3><A NAME="10_6_4">Description</A></H3>
-<P><CODE>cupsGetClasses()</CODE> gets a list of the available printer
-classes. The returned array should be freed using the <CODE>free()</CODE>
- when it is no longer needed. </P>
-<H3><A NAME="10_6_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-int i;
-int num_classes;
-char **classes;
-
-...
-
-num_classes = cupsGetClasses(
-
-...
-
-if (num_classes > 0)
-{
- for (i = 0; i num_classes; i ++)
- free(classes[i]);
-
- free(classes);
-}
-</PRE>
-<H3><A NAME="10_6_6">See Also</A></H3>
-<P><A HREF="#cupsGetDefault"> cupsGetDefault(), <A HREF="#cupsGetPrinters">
-cupsGetPrinters()
-<!-- NEW PAGE -->
-</A></A></P>
-<H2><A NAME="cupsGetDefault">cupsGetDefault()</A></H2>
-<H3><A NAME="10_7_1">Usage</A></H3>
-<PRE>
-const char *
-cupsGetDefault(void);
-</PRE>
-<H3><A NAME="10_7_2">Returns</A></H3>
-<P>A pointer to the default destination. </P>
-<H3><A NAME="10_7_3">Description</A></H3>
-<P><CODE>cupsGetDefault()</CODE> gets the default destination printer
-or class. The default destination is stored in a static string and will
-be overwritten (usually with the same value) after each call. </P>
-<H3><A NAME="10_7_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-printf("The default destination is %s\n", cupsGetDefault());
-</PRE>
-<H3><A NAME="10_7_5">See Also</A></H3>
-<P><A HREF="#cupsGetClasses"> cupsGetClasses(), <A HREF="#cupsGetPrinters">
-cupsGetPrinters()
-<!-- NEW PAGE -->
-</A></A></P>
-<H2><A NAME="cupsGetOption">cupsGetOption()</A></H2>
-<H3><A NAME="10_8_1">Usage</A></H3>
-<PRE>
-const char *
-cupsGetOption(const char *name,
- int num_options,
- cups_option_t *options);
-</PRE>
-<H3><A NAME="10_8_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>name</TD><TD>The name of the option.</TD></TR>
-<TR><TD>num_options</TD><TD>The number of options in the array.</TD></TR>
-<TR><TD>options</TD><TD>The options array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_8_3">Returns</A></H3>
-<P>A pointer to the option values or <CODE>NULL</CODE> if the option is
-not defined. </P>
-<H3><A NAME="10_8_4">Description</A></H3>
-<P><CODE>cupsGetOption()</CODE> returns the first occurrence of the
-named option. If the option is not included in the options array then a <CODE>
-NULL</CODE> pointer is returned. </P>
-<PRE>
-#include <cups/cups.h>
-
-int num_options;
-cups_option_t *options;
-const char *media;
-
-...
-
-media = cupsGetOption("media", num_options, options);
-</PRE>
-<H3><A NAME="10_8_5">See Also</A></H3>
-<P><A HREF="#cupsAddOption"> cupsAddOption()</A>, <A HREF="#cupsFreeOptions">
-cupsFreeOptions()</A>, <A HREF="#cupsMarkOptions">cupsMarkOptions()</A>
-, <A HREF="#cupsParseOptions">cupsParseOptions()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsGetPassword">cupsGetPassword()</A></H2>
-<H3><A NAME="10_9_1">Usage</A></H3>
-<PRE>
-const char *
-cupsGetPassword(const char *prompt);
-</PRE>
-<H3><A NAME="10_9_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>prompt</TD><TD>The prompt to display to the user.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_9_3">Returns</A></H3>
-<P>A pointer to the password that was entered or <CODE>NULL</CODE> if
-no password was entered. </P>
-<H3><A NAME="10_9_4">Description</A></H3>
-<P><CODE>cupsGetPassword()</CODE> displays the prompt string and asks
-the user for a password. The password text is not echoed to the user. </P>
-<H3><A NAME="10_9_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-char *password;
-
-...
-
-password = cupsGetPassword("Please enter a password:");
-</PRE>
-<H3><A NAME="10_9_6">See Also</A></H3>
-<P><A HREF="#cupsServer"> cupsServer()</A>, <A HREF="#cupsSetPasswordCB">
-cupsSetPasswordCB()</A>, <A HREF="#cupsSetServer">cupsSetServer()</A>, <A
-HREF="#cupsSetUser">cupsSetUser()</A>, <A HREF="#cupsUser()">cupsUser()</A>
-<!-- NEW PAGE -->
-
-</P>
-<H2><A NAME="cupsGetPPD">cupsGetPPD()</A></H2>
-<H3><A NAME="10_10_1">Usage</A></H3>
-<PRE>
-const char *
-cupsGetPPD(const char *printer);
-</PRE>
-<H3><A NAME="10_10_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>printer</TD><TD>The name of the printer.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_10_3">Returns</A></H3>
-<P>The name of a temporary file containing the PPD file or <CODE>NULL</CODE>
- if the printer cannot be located or does not have a PPD file. </P>
-<H3><A NAME="10_10_4">Description</A></H3>
-<P><CODE>cupsGetPPD()</CODE> gets a copy of the PPD file for the named
-printer. The printer name can be of the form "printer" or
-"printer@hostname". </P>
-<P>You should remove (unlink) the PPD file after you are done using it.
-The filename is stored in a static buffer and will be overwritten with
-each call to <CODE>cupsGetPPD()</CODE>. </P>
-<H3><A NAME="10_10_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-char *ppd;
-
-...
-
-ppd = cupsGetPPD("printer@hostname");
-
-...
-
-unlink(ppd);
-</PRE>
-
-<!-- NEW PAGE -->
-<H2><A NAME="cupsGetPrinters">cupsGetPrinters()</A></H2>
-<H3><A NAME="10_11_1">Usage</A></H3>
-<PRE>
-int
-cupsGetPrinters(char ***printers);
-</PRE>
-<H3><A NAME="10_11_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>printers</TD><TD>Pointer to character pointer array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_11_3">Returns</A></H3>
-<P>The number of printer printers available. </P>
-<H3><A NAME="10_11_4">Description</A></H3>
-<P><CODE>cupsGetPrinters()</CODE> gets a list of the available
-printers. The returned array should be freed using the <CODE>free()</CODE>
- when it is no longer needed. </P>
-<H3><A NAME="10_11_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-int i;
-int num_printers;
-char **printers;
-
-...
-
-num_printers = cupsGetPrinters(
-
-...
-
-if (num_printers > 0)
-{
- for (i = 0; i num_printers; i ++)
- free(printers[i]);
-
- free(printers);
-}
-</PRE>
-<H3><A NAME="10_11_6">See Also</A></H3>
-<P><A HREF="#cupsGetClasses"> cupsGetClasses(), <A HREF="#cupsGetDefault">
-cupsGetDefault()
-<!-- NEW PAGE -->
-</A></A></P>
-<H2><A NAME="cupsLangDefault">cupsLangDefault()</A></H2>
-<H3><A NAME="10_12_1">Usage</A></H3>
-<PRE>
-const char *
-cupsLangDefault(void);
-</PRE>
-<H3><A NAME="10_12_2">Returns</A></H3>
-<P>A pointer to the default language structure. </P>
-<H3><A NAME="10_12_3">Description</A></H3>
-<P><CODE>cupsLangDefault()</CODE> returns a language structure for the
-default language. The default language is defined by the <CODE>LANG</CODE>
- environment variable. If the specified language cannot be located then
-the POSIX (English) locale is used. </P>
-<P>Call <CODE>cupsLangFree()</CODE> to free any memory associated with
-the language structure when you are done. </P>
-<H3><A NAME="10_12_4">Example</A></H3>
-<PRE>
-#include <cups/language.h>
-
-cups_lang_t *language;
-...
-
-language = cupsLangDefault();
-
-...
-
-cupsLangFree(language);
-</PRE>
-<H3><A NAME="10_12_5">See Also</A></H3>
-<P><A HREF="#cupsLangEncoding"> cupsLangEncoding()</A>, <A HREF="#cupsLangFlush">
-cupsLangFlush()</A>, <A HREF="#cupsLangFree">cupsLangFree()</A>, <A HREF="#cupsLangGet">
-cupsLangGet()</A>, <A HREF="#cupsLangString">cupsLangString()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsLangEncoding">cupsLangEncoding()</A></H2>
-<H3><A NAME="10_13_1">Usage</A></H3>
-<PRE>
-char *
-cupsLangEncoding(cups_lang_t *language);
-</PRE>
-<H3><A NAME="10_13_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>language</TD><TD>The language structure.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_13_3">Returns</A></H3>
-<P>A pointer to the encoding string. </P>
-<H3><A NAME="10_13_4">Description</A></H3>
-<P><CODE>cupsLangEncoding()</CODE> returns the language encoding used
-for the specified language, e.g. "iso-8859-1", "utf-8", etc. </P>
-<H3><A NAME="10_13_5">Example</A></H3>
-<PRE>
-#include <cups/language.h>
-
-cups_lang_t *language;
-char *encoding;
-...
-
-language = cupsLangDefault();
-encoding = cupsLangEncoding(language);
-...
-
-cupsLangFree(language);
-</PRE>
-<H3><A NAME="10_13_6">See Also</A></H3>
-<P><A HREF="#cupsLangDefault"> cupsLangDefault()</A>, <A HREF="#cupsLangFlush">
-cupsLangFlush()</A>, <A HREF="#cupsLangFree">cupsLangFree()</A>, <A HREF="#cupsLangGet">
-cupsLangGet()</A>, <A HREF="#cupsLangString">cupsLangString()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsLangFlush">cupsLangFlush()</A></H2>
-<H3><A NAME="10_14_1">Usage</A></H3>
-<PRE>
-void
-cupsLangFlush(void);
-</PRE>
-<H3><A NAME="10_14_2">Description</A></H3>
-<P><CODE>cupsLangFlush()</CODE> frees all language structures that have
-been allocated. </P>
-<H3><A NAME="10_14_3">Example</A></H3>
-<PRE>
-#include <cups/language.h>
-
-...
-
-cupsLangFlush();
-</PRE>
-<H3><A NAME="10_14_4">See Also</A></H3>
-<P><A HREF="#cupsLangDefault"> cupsLangDefault()</A>, <A HREF="#cupsLangEncoding">
-cupsLangEncoding()</A>, <A HREF="#cupsLangFree">cupsLangFree()</A>, <A HREF="#cupsLangGet">
-cupsLangGet()</A>, <A HREF="#cupsLangString">cupsLangString()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsLangFree">cupsLangFree()</A></H2>
-<H3><A NAME="10_15_1">Usage</A></H3>
-<PRE>
-void
-cupsLangFree(cups_lang_t *language);
-</PRE>
-<H3><A NAME="10_15_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>language</TD><TD>The language structure to free.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_15_3">Description</A></H3>
-<P><CODE>cupsLangFree()</CODE> frees the specified language structure. </P>
-<H3><A NAME="10_15_4">Example</A></H3>
-<PRE>
-#include <cups/language.h>
-
-cups_lang_t *language;
-...
-
-cupsLangFree(language);
-</PRE>
-<H3><A NAME="10_15_5">See Also</A></H3>
-<P><A HREF="#cupsLangDefault"> cupsLangDefault()</A>, <A HREF="#cupsLangEncoding">
-cupsLangEncoding()</A>, <A HREF="#cupsLangFlush">cupsLangFlush()</A>, <A HREF="#cupsLangGet">
-cupsLangGet()</A>, <A HREF="#cupsLangString">cupsLangString()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsLangGet">cupsLangGet()</A></H2>
-<H3><A NAME="10_16_1">Usage</A></H3>
-<PRE>
-cups_lang_t *
-cupsLangGet(const char *name);
-</PRE>
-<H3><A NAME="10_16_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>name</TD><TD>The name of the locale.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_16_3">Returns</A></H3>
-<P>A pointer to a language structure. </P>
-<H3><A NAME="10_16_4">Description</A></H3>
-<P><CODE>cupsLangGet()</CODE> returns a language structure for the
-specified locale. If the locale is not defined then the POSIX (English)
-locale is substituted. </P>
-<H3><A NAME="10_16_5">Example</A></H3>
-<PRE>
-#include <cups/language.h>
-
-cups_lang_t *language;
-
-...
-
-language = cupsLangGet("fr");
-
-...
-
-cupsLangFree(language);
-</PRE>
-<H3><A NAME="10_16_6">See Also</A></H3>
-<P><A HREF="#cupsLangDefault"> cupsLangDefault()</A>, <A HREF="#cupsLangEncoding">
-cupsLangEncoding()</A>, <A HREF="#cupsLangFlush">cupsLangFlush()</A>, <A HREF="#cupsLangFree">
-cupsLangFree()</A>, <A HREF="#cupsLangString">cupsLangString()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsLangString">cupsLangString()</A></H2>
-<H3><A NAME="10_17_1">Usage</A></H3>
-<PRE>
-char *
-cupsLangString(cups_lang_t *language,
- int message);
-</PRE>
-<H3><A NAME="10_17_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>language</TD><TD>The language to query.</TD></TR>
-<TR><TD>message</TD><TD>The message number.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_17_3">Returns</A></H3>
-<P>A pointer to the message string or <CODE>NULL</CODE> if the message
-is not defined. </P>
-<H3><A NAME="10_17_4">Description</A></H3>
-<P><CODE>cupsLangString()</CODE> returns a pointer to the specified
-message string in the specified language. </P>
-<H3><A NAME="10_17_5">Example</A></H3>
-<PRE>
-#include <cups/language.h>
-
-cups_lang_t *language;
-char *s;
-...
-
-language = cupsLangGet("fr");
-
-s = cupsLangString(language, CUPS_MSG_YES);
-
-...
-
-cupsLangFree(language);
-</PRE>
-<H3><A NAME="10_17_6">See Also</A></H3>
-<P><A HREF="#cupsLangDefault"> cupsLangDefault()</A>, <A HREF="#cupsLangEncoding">
-cupsLangEncoding()</A>, <A HREF="#cupsLangFlush">cupsLangFlush()</A>, <A HREF="#cupsLangFree">
-cupsLangFree()</A>, <A HREF="#cupsLangGet">cupsLangGet()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsLastError">cupsLastError()</A></H2>
-<H3><A NAME="10_18_1">Usage</A></H3>
-<PRE>
-ipp_status_t
-cupsLastError(void);
-</PRE>
-<H3><A NAME="10_18_2">Returns</A></H3>
-<P>An enumeration containing the last IPP error. </P>
-<H3><A NAME="10_18_3">Description</A></H3>
-<P><CODE>cupsLastError()</CODE> returns the last IPP error that
-occurred. If no error occurred then it will return <CODE>IPP_OK</CODE>
- or <CODE>IPP_OK_CONFLICT</CODE>. </P>
-<H3><A NAME="10_18_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-ipp_status_t status;
-
-...
-
-status = cupsLastError();
-</PRE>
-<H3><A NAME="10_18_5">See Also</A></H3>
-<P><A HREF="#cupsCancelJob"> cupsCancelJob()</A>, <A HREF="#cupsPrintFile">
-cupsPrintFile()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsMarkOptions">cupsMarkOptions()</A></H2>
-<H3><A NAME="10_19_1">Usage</A></H3>
-<PRE>
-int
-cupsMarkOptions(ppd_file_t *ppd,
- int num_options,
- cups_option_t *options);
-</PRE>
-<H3><A NAME="10_19_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file to mark.</TD></TR>
-<TR><TD>num_options</TD><TD>The number of options in the options array.</TD>
-</TR>
-<TR><TD>options</TD><TD>A pointer to the options array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_19_3">Returns</A></H3>
-<P>The number of conflicts found. </P>
-<H3><A NAME="10_19_4">Description</A></H3>
-<P><CODE>cupsMarkOptions()</CODE> marks options in the PPD file. It
-also handles mapping of IPP option names and values to PPD option
-names. </P>
-<H3><A NAME="10_19_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-int num_options;
-cups_option_t *options;
-ppd_file_t *ppd;
-
-...
-
-cupsMarkOptions(ppd, num_options, options);
-</PRE>
-<H3><A NAME="10_19_6">See Also</A></H3>
-<P><A HREF="#cupsAddOption"> cupsAddOption()</A>, <A HREF="#cupsFreeOptions">
-cupsFreeOptions()</A>, <A HREF="#cupsGetOption">cupsGetOption()</A>, <A HREF="#cupsParseOptions">
-cupsParseOptions()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsParseOptions">cupsParseOptions()</A></H2>
-<H3><A NAME="10_20_1">Usage</A></H3>
-<PRE>
-int
-cupsParseOptions(const char *arg,
- int num_options,
- cups_option_t **options);
-</PRE>
-<H3><A NAME="10_20_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>arg</TD><TD>The string containing one or more options.</TD></TR>
-<TR><TD>num_options</TD><TD>The number of options in the options array.</TD>
-</TR>
-<TR><TD>options</TD><TD>A pointer to the options array pointer.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_20_3">Returns</A></H3>
-<P>The new number of options in the array. </P>
-<H3><A NAME="10_20_4">Description</A></H3>
-<P><CODE>cupsParseOptions()</CODE> parses the specifies string for one
-or more options of the form "name=value", "name", or "noname". It can
-be called multiple times to combine the options from several strings. </P>
-<H3><A NAME="10_20_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-int num_options;
-cups_option_t *options;
-
-...
-
-num_options = 0;
-options = (cups_option_t *)0;
-num_options = cupsParseOptions(argv[5], num_options, &options);
-</PRE>
-<H3><A NAME="10_20_6">See Also</A></H3>
-<P><A HREF="#cupsAddOption"> cupsAddOption()</A>, <A HREF="#cupsFreeOptions">
-cupsFreeOptions()</A>, <A HREF="#cupsGetOption">cupsGetOption()</A>, <A HREF="#cupsMarkOptions">
-cupsMarkOptions()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsPrintFile">cupsPrintFile()</A></H2>
-<H3><A NAME="10_21_1">Usage</A></H3>
-<PRE>
-int
-cupsPrintFile(const char *printer,
- const char *filename,
- const char *title,
- int num_options,
- cups_option_t *options);
-</PRE>
-<H3><A NAME="10_21_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>printer</TD><TD>The printer or class to print to.</TD></TR>
-<TR><TD>filename</TD><TD>The file to print.</TD></TR>
-<TR><TD>title</TD><TD>The job title.</TD></TR>
-<TR><TD>num_options</TD><TD>The number of options in the options array.</TD>
-</TR>
-<TR><TD>options</TD><TD>A pointer to the options array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_21_3">Returns</A></H3>
-<P>The new job ID number or 0 on error. </P>
-<H3><A NAME="10_21_4">Description</A></H3>
-<P><CODE>cupsPrintFile()</CODE> sends a file to the specified printer
-or class for printing. If the job cannot be printed the error code can
-be found by calling <CODE>cupsLastError()</CODE>. </P>
-<H3><A NAME="10_21_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-int num_options;
-cups_option_t *options;
-int jobid;
-
-...
-
-jobid = cupsPrintFile("printer@hostname", "filename.ps", "Job Title",
- num_options, options);
-</PRE>
-<H3><A NAME="10_21_6">See Also</A></H3>
-<P><A HREF="#cupsCancelJob"> cupsCancelJob()</A>, <A HREF="#cupsLastError">
-cupsLastError()</A>, <A HREF="#cupsPrintFiles">cupsPrintFiles()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsPrintFiles">cupsPrintFiles()</A></H2>
-<H3><A NAME="10_22_1">Usage</A></H3>
-<PRE>
-int
-cupsPrintFiles(const char *printer,
- int num_files,
- const char **files,
- const char *title,
- int num_options,
- cups_option_t *options);
-</PRE>
-<H3><A NAME="10_22_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>printer</TD><TD>The printer or class to print to.</TD></TR>
-<TR><TD>num_files</TD><TD>The number of files to print.</TD></TR>
-<TR><TD>files</TD><TD>The files to print.</TD></TR>
-<TR><TD>title</TD><TD>The job title.</TD></TR>
-<TR><TD>num_options</TD><TD>The number of options in the options array.</TD>
-</TR>
-<TR><TD>options</TD><TD>A pointer to the options array.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_22_3">Returns</A></H3>
-<P>The new job ID number or 0 on error. </P>
-<H3><A NAME="10_22_4">Description</A></H3>
-<P><CODE>cupsPrintFiles()</CODE> sends multiple files to the specified
-printer or class for printing. If the job cannot be printed the error
-code can be found by calling <CODE>cupsLastError()</CODE>. </P>
-<H3><A NAME="10_22_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-int num_files;
-const char *files[100];
-int num_options;
-cups_option_t *options;
-int jobid;
-
-...
-
-jobid = cupsPrintFiles("printer@hostname", num_files, files,
- "Job Title", num_options, options);
-</PRE>
-<H3><A NAME="10_22_6">See Also</A></H3>
-<P><A HREF="#cupsCancelJob"> cupsCancelJob()</A>, <A HREF="#cupsLastError">
-cupsLastError()</A>, <A HREF="#cupsPrintFile">cupsPrintFile()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsRasterClose">cupsRasterClose()</A></H2>
-<H3><A NAME="10_23_1">Usage</A></H3>
-<PRE>
-void
-cupsRasterClose(cups_raster_t *ras);
-</PRE>
-<H3><A NAME="10_23_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ras</TD><TD>The raster stream to close.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_23_3">Description</A></H3>
-<P><CODE>cupsRasterClose()</CODE> closes the specified raster stream. </P>
-<H3><A NAME="10_23_4">Example</A></H3>
-<PRE>
-#include <cups/raster.h>
-
-cups_raster_t *ras;
-
-...
-
-cupsRasterClose(ras);
-</PRE>
-<H3><A NAME="10_23_5">See Also</A></H3>
-<P><A HREF="#cupsRasterOpen"> cupsRasterOpen()</A>, <A HREF="#cupsRasterReadHeader">
-cupsRasterReadHeader()</A>, <A HREF="#cupsRasterReadPixels">
-cupsRasterReadPixels()</A>, <A HREF="#cupsRasterWriteHeader">
-cupsRasterWriteHeader()</A>, <A HREF="#cupsRasterWritePixels">
-cupsRasterWritePixels()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsRasterOpen">cupsRasterOpen()</A></H2>
-<H3><A NAME="10_24_1">Usage</A></H3>
-<PRE>
-cups_raster_t *
-cupsRasterOpen(int fd,
- cups_mode_t mode);
-</PRE>
-<H3><A NAME="10_24_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>fd</TD><TD>The file descriptor to use.</TD></TR>
-<TR><TD>mode</TD><TD>The mode to use; <CODE>CUPS_RASTER_READ</CODE> or <CODE>
- CUPS_RASTER_WRITE</CODE>.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_24_3">Returns</A></H3>
-<P>A pointer to a raster stream or <CODE>NULL</CODE> if there was an
-error. </P>
-<H3><A NAME="10_24_4">Description</A></H3>
-<P><CODE>cupsRasterOpen()</CODE> opens a raster stream for reading or
-writing. </P>
-<H3><A NAME="10_24_5">Example</A></H3>
-<PRE>
-#include <cups/raster.h>
-
-cups_raster_t *ras;
-
-...
-
-ras = cupsRasterOpen(0, CUPS_RASTER_READ);
-</PRE>
-<H3><A NAME="10_24_6">See Also</A></H3>
-<P><A HREF="#cupsRasterClose"> cupsRasterClose()</A>, <A HREF="#cupsRasterReadHeader">
-cupsRasterReadHeader()</A>, <A HREF="#cupsRasterReadPixels">
-cupsRasterReadPixels()</A>, <A HREF="#cupsRasterWriteHeader">
-cupsRasterWriteHeader()</A>, <A HREF="#cupsRasterWritePixels">
-cupsRasterWritePixels()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsRasterReadHeader">cupsRasterReadHeader()</A></H2>
-<H3><A NAME="10_25_1">Usage</A></H3>
-<PRE>
-unsigned
-cupsRasterReadHeader(cups_raster_t *ras,
- cups_page_header_t *header);
-</PRE>
-<H3><A NAME="10_25_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ras</TD><TD>The raster stream to read from.</TD></TR>
-<TR><TD>header</TD><TD>A pointer to a page header structure to read
-into.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_25_3">Returns</A></H3>
-<P>1 on success, 0 on EOF or error. </P>
-<H3><A NAME="10_25_4">Description</A></H3>
-<P><CODE>cupsRasterReadHeader()</CODE> reads a page header from the
-specified raster stream. </P>
-<H3><A NAME="10_25_5">Example</A></H3>
-<PRE>
-#include <cups/raster.h>
-
-int line;
-cups_raster_t *ras;
-cups_raster_header_t header;
-unsigned char pixels[8192];
-...
-
-while (cupsRasterReadHeader(ras, &header))
-{
- ...
-
- for (line = 0; line < header.cupsHeight; line ++)
- {
- cupsRasterReadPixels(ras, pixels, header.cupsBytesPerLine);
-
- ...
- }
-}
-</PRE>
-<H3><A NAME="10_25_6">See Also</A></H3>
-<P><A HREF="#cupsRasterClose"> cupsRasterClose()</A>, <A HREF="#cupsRasterOpen">
-cupsRasterOpen()</A>, <A HREF="#cupsRasterReadPixels">
-cupsRasterReadPixels()</A>, <A HREF="#cupsRasterWriteHeader">
-cupsRasterWriteHeader()</A>, <A HREF="#cupsRasterWritePixels">
-cupsRasterWritePixels()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsRasterReadPixels">cupsRasterReadPixels()</A></H2>
-<H3><A NAME="10_26_1">Usage</A></H3>
-<PRE>
-unsigned
-cupsRasterReadPixels(cups_raster_t *ras,
- unsigned char *pixels,
- unsigned length);
-</PRE>
-<H3><A NAME="10_26_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ras</TD><TD>The raster stream to read from.</TD></TR>
-<TR><TD>pixels</TD><TD>The pointer to a pixel buffer.</TD></TR>
-<TR><TD>length</TD><TD>The number of bytes of pixel data to read.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_26_3">Returns</A></H3>
-<P>The number of bytes read or 0 on EOF or error. </P>
-<H3><A NAME="10_26_4">Description</A></H3>
-<P><CODE>cupsRasterReadPixels()</CODE> reads pixel data from the
-specified raster stream. </P>
-<H3><A NAME="10_26_5">Example</A></H3>
-<PRE>
-#include <cups/raster.h>
-
-int line;
-cups_raster_t *ras;
-cups_raster_header_t header;
-unsigned char pixels[8192];
-...
-
-while (cupsRasterReadHeader(ras, &header))
-{
- ...
-
- for (line = 0; line < header.cupsHeight; line ++)
- {
- cupsRasterReadPixels(ras, pixels, header.cupsBytesPerLine);
-
- ...
- }
-}
-</PRE>
-<H3><A NAME="10_26_6">See Also</A></H3>
-<P><A HREF="#cupsRasterClose"> cupsRasterClose()</A>, <A HREF="#cupsRasterOpen">
-cupsRasterOpen()</A>, <A HREF="#cupsRasterReadHeader">
-cupsRasterReadHeader()</A>, <A HREF="#cupsRasterWriteHeader">
-cupsRasterWriteHeader()</A>, <A HREF="#cupsRasterWritePixels">
-cupsRasterWritePixels()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsRasterWriteHeader">cupsRasterWriteHeader()</A></H2>
-<H3><A NAME="10_27_1">Usage</A></H3>
-<PRE>
-unsigned
-cupsRasterWriteHeader(cups_raster_t *ras,
- cups_page_header_t *header);
-</PRE>
-<H3><A NAME="10_27_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ras</TD><TD>The raster stream to write to.</TD></TR>
-<TR><TD>header</TD><TD>A pointer to the page header to write.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_27_3">Returns</A></H3>
-<P>1 on success, 0 on error. </P>
-<H3><A NAME="10_27_4">Description</A></H3>
-<P><CODE>cupsRasterWriteHeader()</CODE> writes the specified page
-header to a raster stream. </P>
-<H3><A NAME="10_27_5">Example</A></H3>
-<PRE>
-#include <cups/raster.h>
-
-int line;
-cups_raster_t *ras;
-cups_raster_header_t header;
-unsigned char pixels[8192];
-...
-
-cupsRasterWriteHeader(ras, &header);
-
-for (line = 0; line < header.cupsHeight; line ++)
-{
- ...
-
- cupsRasterWritePixels(ras, pixels, header.cupsBytesPerLine);
-}
-</PRE>
-<H3><A NAME="10_27_6">See Also</A></H3>
-<P><A HREF="#cupsRasterClose"> cupsRasterClose()</A>, <A HREF="#cupsRasterOpen">
-cupsRasterOpen()</A>, <A HREF="#cupsRasterReadHeader">
-cupsRasterReadHeader()</A>, <A HREF="#cupsRasterReadPixels">
-cupsRasterReadPixels()</A>, <A HREF="#cupsRasterWritePixels">
-cupsRasterWritePixels()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsRasterWritePixels">cupsRasterWritePixels()</A></H2>
-<H3><A NAME="10_28_1">Usage</A></H3>
-<PRE>
-unsigned
-cupsRasterWritePixels(cups_raster_t *ras,
- unsigned char *pixels,
- unsigned length);
-</PRE>
-<H3><A NAME="10_28_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ras</TD><TD>The raster stream to write to.</TD></TR>
-<TR><TD>pixels</TD><TD>The pixel data to write.</TD></TR>
-<TR><TD>length</TD><TD>The number of bytes to write.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_28_3">Returns</A></H3>
-<P>The number of bytes written. </P>
-<H3><A NAME="10_28_4">Description</A></H3>
-<P><CODE>cupsRasterWritePixels()</CODE> writes the specified pixel data
-to a raster stream. </P>
-<H3><A NAME="10_28_5">Example</A></H3>
-<PRE>
-#include <cups/raster.h>
-
-int line;
-cups_raster_t *ras;
-cups_raster_header_t header;
-unsigned char pixels[8192];
-...
-
-cupsRasterWriteHeader(ras, &header);
-
-for (line = 0; line < header.cupsHeight; line ++)
-{
- ...
-
- cupsRasterWritePixels(ras, pixels, header.cupsBytesPerLine);
-}
-</PRE>
-<H3><A NAME="10_28_6">See Also</A></H3>
-<P><A HREF="#cupsRasterClose"> cupsRasterClose()</A>, <A HREF="#cupsRasterOpen">
-cupsRasterOpen()</A>, <A HREF="#cupsRasterReadHeader">
-cupsRasterReadHeader()</A>, <A HREF="#cupsRasterReadPixels">
-cupsRasterReadPixels()</A>, <A HREF="#cupsRasterWriteHeader">
-cupsRasterWriteHeader()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsServer">cupsServer()</A></H2>
-<H3><A NAME="10_29_1">Usage</A></H3>
-<PRE>
-const char *
-cupsServer(void);
-</PRE>
-<H3><A NAME="10_29_2">Returns</A></H3>
-<P>A pointer to the default server name. </P>
-<H3><A NAME="10_29_3">Description</A></H3>
-<P><CODE>cupsServer()</CODE> returns a pointer to the default server
-name. The server name is stored in a static location and will be
-overwritten with every call to <CODE>cupsServer()</CODE></P>
-<P>The default server is determined from the following locations: </P>
-<OL>
-<LI>The <CODE>CUPS_SERVER</CODE> environment variable, </LI>
-<LI>The <CODE>ServerName</CODE> directive in the <VAR> client.conf</VAR>
- file, </LI>
-<LI>The default host, "localhost". </LI>
-</OL>
-<H3><A NAME="10_29_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-const char *server;
-
-server = cupsServer();
-</PRE>
-<H3><A NAME="10_29_5">See Also</A></H3>
-<P><A HREF="#cupsGetPassword"> cupsGetPassword()</A>, <A HREF="#cupsSetPasswordCB">
-cupsSetPasswordCB()</A>, <A HREF="#cupsSetServer">cupsSetServer()</A>, <A
-HREF="#cupsSetUser">cupsSetUser()</A>, <A HREF="#cupsUser">cupsUser()</A>
-<!-- NEW PAGE -->
-
-</P>
-<H2><A NAME="cupsSetPasswordCB">cupsSetPasswordCB()</A></H2>
-<H3><A NAME="10_30_1">Usage</A></H3>
-<PRE>
-void
-cupsSetPasswordCB(const char *(*cb)(const char *prompt));
-</PRE>
-<H3><A NAME="10_30_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>cb</TD><TD>The password callback function.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_30_3">Description</A></H3>
-<P><CODE>cupsSetPasswordCB()</CODE> sets the callback function to use
-when asking the user for a password. The callback function must accept
-a single character string pointer (the prompt string) and return <CODE>
-NULL</CODE> if the user did not enter a password string or a pointer to
-the password string otherwise. </P>
-<H3><A NAME="10_30_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-const char *
-my_password_cb(const char *prompt)
-{
- return (getpass(prompt));
-}
-
-...
-
-char *password;
-
-...
-
-cupsSetPasswordCB(my_password_cb);
-password = cupsGetPassword("Please enter a password:");
-</PRE>
-<H3><A NAME="10_30_5">See Also</A></H3>
-<P><A HREF="#cupsServer"> cupsServer()</A>, <A HREF="#cupsSetServer">
-cupsSetServer()</A>, <A HREF="#cupsSetUser">cupsSetUser()</A>, <A HREF="#cupsUser()">
-cupsUser()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsSetServer">cupsSetServer()</A></H2>
-<H3><A NAME="10_31_1">Usage</A></H3>
-<PRE>
-void
-cupsSetServer(const char *server);
-</PRE>
-<H3><A NAME="10_31_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>server</TD><TD>The default server to use.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_31_3">Description</A></H3>
-<P><CODE>cupsSetServer()</CODE> sets the default server to use for the
-CUPS API. If the <CODE>server</CODE> argument is <CODE>NULL</CODE>, the
-default server is used. </P>
-<H3><A NAME="10_31_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-cupsSetServer("foo.bar.com");
-</PRE>
-<H3><A NAME="10_31_5">See Also</A></H3>
-<P><A HREF="#cupsServer"> cupsServer()</A>, <A HREF="#cupsSetPasswordCB">
-cupsSetPasswordCB()</A>, <A HREF="#cupsSetUser">cupsSetUser()</A>, <A HREF="#cupsUser()">
-cupsUser()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsSetUser">cupsSetUser()</A></H2>
-<H3><A NAME="10_32_1">Usage</A></H3>
-<PRE>
-void
-cupsSetUser(const char *user);
-</PRE>
-<H3><A NAME="10_32_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>user</TD><TD>The user name string to use.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_32_3">Description</A></H3>
-<P><CODE>cupsSetUser()</CODE> sets the default user name for
-authentication. If the <CODE>user</CODE> argument is <CODE>NULL</CODE>
- then the current login user is used. </P>
-<H3><A NAME="10_32_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-...
-
-cupsSetUser("root");
-</PRE>
-<H3><A NAME="10_32_5">See Also</A></H3>
-<P><A HREF="#cupsServer"> cupsServer()</A>, <A HREF="#cupsSetPasswordCB">
-cupsSetPasswordCB()</A>, <A HREF="#cupsSetServer">cupsSetServer()</A>, <A
-HREF="#cupsUser()">cupsUser()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="cupsTempFile">cupsTempFile()</A></H2>
-<H3><A NAME="10_33_1">Usage</A></H3>
-<PRE>
-char *
-cupsTempFile(char *filename,
- int length);
-</PRE>
-<H3><A NAME="10_33_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>filename</TD><TD>The character string to hold the temporary
-filename.</TD></TR>
-<TR><TD>length</TD><TD>The size of the filename string in bytes.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_33_3">Returns</A></H3>
-<P>A pointer to <CODE>filename</CODE>. </P>
-<H3><A NAME="10_33_4">Description</A></H3>
-<P><CODE>cupsTempFile()</CODE> generates a temporary filename for the <VAR>
-/var/tmp</VAR> directory or the directory specified by the <CODE>TMPDIR</CODE>
- environment variable. </P>
-<H3><A NAME="10_33_5">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-char filename[256];
-
-cupsTempFile(filename, sizeof(filename));
-</PRE>
-
-<!-- NEW PAGE -->
-<H2><A NAME="cupsUser">cupsUser()</A></H2>
-<H3><A NAME="10_34_1">Usage</A></H3>
-<PRE>
-const char *
-cupsUser(void);
-</PRE>
-<H3><A NAME="10_34_2">Returns</A></H3>
-<P>A pointer to the current username or <CODE>NULL</CODE> if the user
-ID is undefined. </P>
-<H3><A NAME="10_34_3">Description</A></H3>
-<P><CODE>cupsUser()</CODE> returns the name associated with the current
-user ID as reported by the <CODE>getuid()</CODE> system call. </P>
-<H3><A NAME="10_34_4">Example</A></H3>
-<PRE>
-#include <cups/cups.h>
-
-const char *user;
-
-user = cupsUser();
-</PRE>
-<H3><A NAME="10_34_5">See Also</A></H3>
-<P><A HREF="#cupsGetPassword"> cupsGetPassword()</A>, <A HREF="#cupsServer">
-cupsServer()</A>
-<!-- NEW PAGE -->
-</P>
-<H2><A NAME="httpBlocking">httpBlocking()</A></H2>
-<H3><A NAME="10_35_1">Usage</A></H3>
-<PRE>
-void httpBlocking(http_t *http, int blocking)
-</PRE>
-<H3><A NAME="10_35_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>blocking</TD><TD>0 if the connection should be non-blocking, 1
-if it should be blocking</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_35_3">Description</A></H3>
-<P>The <CODE>httpBlocking()</CODE> function sets the blocking mode for
-the HTTP connection. By default HTTP connections will block (stop) the
-client program until data is available or can be sent to the server. </P>
-<H3><A NAME="10_35_4">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-http = httpConnect("server", port);
-httpBlocking(http, 0);
-</PRE>
-<H3><A NAME="10_35_5">See Also</A></H3>
-<A HREF="#httpCheck"><CODE> httpCheck()</CODE></A>, <A HREF="#httpConnect">
-<CODE>httpConnect()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpCheck">httpCheck()</A></H2>
-<H3><A NAME="10_36_1">Usage</A></H3>
-<PRE>
-int httpCheck(http_t *http);
-</PRE>
-<H3><A NAME="10_36_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_36_3">Returns</A></H3>
-<P>0 if there is no data pending, 1 otherwise. </P>
-<H3><A NAME="10_36_4">Description</A></H3>
-<P>The <CODE>httpCheck()</CODE> function checks to see if there is any
-data pending on an HTTP connection. </P>
-<H3><A NAME="10_36_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-if (httpCheck(http))
-{
- ... do something ...
-}
-</PRE>
-<H3><A NAME="10_36_6">See Also</A></H3>
-<A HREF="#httpBlocking"><CODE> httpBlocking()</CODE></A>, <A HREF="#httpConnect">
-<CODE>httpConnect()</CODE></A>, <A HREF="#httpGets"><CODE>httpGets()</CODE>
-</A>, <A HREF="#httpRead"><CODE>httpRead()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpClearFields">httpClearFields()</A></H2>
-<H3><A NAME="10_37_1">Usage</A></H3>
-<PRE>
-void httpClearFields(http_t *http)
-</PRE>
-<H3><A NAME="10_37_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_37_3">Description</A></H3>
-<P>The <CODE>httpClearFields()</CODE> function clears all HTTP request
-fields for the HTTP connection. </P>
-<H3><A NAME="10_37_4">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpClearFields(http);
-</PRE>
-<H3><A NAME="10_37_5">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpGetField">
-<CODE>httpGetField()</CODE></A>, <A HREF="#httpSetField"><CODE>
-httpSetField()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpClose">httpClose()</A></H2>
-<H3><A NAME="10_38_1">Usage</A></H3>
-<PRE>
-void httpClose(http_t *http);
-</PRE>
-<H3><A NAME="10_38_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_38_3">Description</A></H3>
-<P>The <CODE>httpClose()</CODE> function closes an active HTTP
-connection. </P>
-<H3><A NAME="10_38_4">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpClose(http);
-</PRE>
-<H3><A NAME="10_38_5">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpConnect">httpConnect()</A></H2>
-<H3><A NAME="10_39_1">Usage</A></H3>
-<PRE>
-http_t *httpConnect(const char *hostname, int port);
-</PRE>
-<H3><A NAME="10_39_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>hostname</TD><TD>The name or IP address of the server to
-connect to</TD></TR>
-<TR><TD>port</TD><TD>The port number to use</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_39_3">Returns</A></H3>
-<P>A pointer to a HTTP connection structure or NULL if the connection
-could not be made. </P>
-<H3><A NAME="10_39_4">Description</A></H3>
-<P>The <CODE>httpConnect()</CODE> function opens a HTTP connection to
-the specified server and port. </P>
-<H3><A NAME="10_39_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-http = httpConnect(cupsServer(), ippPort());
-</PRE>
-<H3><A NAME="10_39_6">See Also</A></H3>
-<A HREF="#httpClose"><CODE> httpClose()</CODE></A>, <A HREF="#httpGet"><CODE>
-httpGet()</CODE></A>, <A HREF="#httpGets"><CODE>httpGets()</CODE></A>, <A
-HREF="#httpPost"><CODE>httpPost()</CODE></A>, <A HREF="#httpRead"><CODE>
-httpRead()</CODE></A>, <A HREF="#httpWrite"><CODE>httpWrite()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpDecode64">httpDecode64()</A></H2>
-<H3><A NAME="10_40_1">Usage</A></H3>
-<PRE>
-char *httpDecode64(char *out, const char *in);
-</PRE>
-<H3><A NAME="10_40_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>out</TD><TD>The output string</TD></TR>
-<TR><TD>in</TD><TD>The input string</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_40_3">Returns</A></H3>
-<P>A pointer to the decoded string. </P>
-<H3><A NAME="10_40_4">Description</A></H3>
-<P>The <CODE>httpDecode64()</CODE> function decodes a base-64 encoded
-string to the original string. </P>
-<H3><A NAME="10_40_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-char encoded_string[255];
-char original_string[255];
-
-httpDecode64(original_string, encoded_string);
-</PRE>
-<H3><A NAME="10_40_6">See Also</A></H3>
-<A HREF="#httpEncode64"><CODE> httpEncode64()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpDelete">httpDelete()</A></H2>
-<H3><A NAME="10_41_1">Usage</A></H3>
-<PRE>
-int httpDelete(http_t *http, const char *uri);
-</PRE>
-<H3><A NAME="10_41_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>uri</TD><TD>The URI to delete</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_41_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_41_4">Description</A></H3>
-<P>The <CODE>httpDelete()</CODE> function sends a HTTP DELETE request
-to the server. </P>
-<H3><A NAME="10_41_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpDelete(http, "/some/uri");
-</PRE>
-<H3><A NAME="10_41_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>, <A HREF="#httpUpdate"><CODE>
-httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpEncode64">httpEncode64()</A></H2>
-<H3><A NAME="10_42_1">Usage</A></H3>
-<PRE>
-char *httpEncode64(char *out, const char *in);
-</PRE>
-<H3><A NAME="10_42_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>out</TD><TD>The output string</TD></TR>
-<TR><TD>in</TD><TD>The input string</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_42_3">Returns</A></H3>
-<P>A pointer to the encoded string. </P>
-<H3><A NAME="10_42_4">Description</A></H3>
-<P>The <CODE>httpEncode64()</CODE> function decodes a base-64 encoded
-string to the original string. </P>
-<H3><A NAME="10_42_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-char encoded_string[255];
-char original_string[255];
-
-httpEncode64(encoded_string, original_string);
-</PRE>
-<H3><A NAME="10_42_6">See Also</A></H3>
-<A HREF="#httpDecode64"><CODE> httpDecode64()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpError">httpError()</A></H2>
-<H3><A NAME="10_43_1">Usage</A></H3>
-<PRE>
-int httpError(http_t *http);
-</PRE>
-<H3><A NAME="10_43_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_43_3">Returns</A></H3>
-<P>The last error that occurred or 0 if no error has occurred. </P>
-<H3><A NAME="10_43_4">Description</A></H3>
-<P>The <CODE>httpError()</CODE> function returns the last error that
-occurred on the HTTP connection. </P>
-<H3><A NAME="10_43_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-if (httpError(http))
-{
- ... show an error message ...
-}
-</PRE>
-<H3><A NAME="10_43_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpFlush">httpFlush()</A></H2>
-<H3><A NAME="10_44_1">Usage</A></H3>
-<PRE>
-void httpFlush(http_t *http);
-</PRE>
-<H3><A NAME="10_44_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_44_3">Description</A></H3>
-<P>The <CODE>httpFlush()</CODE> function flushes any remaining data
-left from a GET or POST operation. </P>
-<H3><A NAME="10_44_4">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpFlush(http);
-</PRE>
-<H3><A NAME="10_44_5">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>,
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpGet">httpGet()</A></H2>
-<H3><A NAME="10_45_1">Usage</A></H3>
-<PRE>
-int httpGet(http_t *http, const char *uri);
-</PRE>
-<H3><A NAME="10_45_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>uri</TD><TD>The URI to get</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_45_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_45_4">Description</A></H3>
-<P>The <CODE>httpGet()</CODE> function sends a HTTP GET request to the
-server. </P>
-<H3><A NAME="10_45_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpGet(http, "/some/uri");
-</PRE>
-<H3><A NAME="10_45_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>, <A HREF="#httpUpdate"><CODE>
-httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpGets">httpGets()</A></H2>
-<H3><A NAME="10_46_1">Usage</A></H3>
-<PRE>
-char *httpGets(char *line, int length, http_t *http)
-</PRE>
-<H3><A NAME="10_46_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>line</TD><TD>The string to fill with a line from the HTTP
-connection</TD></TR>
-<TR><TD>length</TD><TD>The maximum length of the string</TD></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_46_3">Returns</A></H3>
-<P>A pointer to the string or NULL if no line could be retrieved. </P>
-<H3><A NAME="10_46_4">Description</A></H3>
-<P>The <CODE>httpGets()</CODE> function is used to read a request line
-from the HTTP connection. It is not normally used by a client program. </P>
-<H3><A NAME="10_46_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-char line[1024];
-
-if (httpGets(line, sizeof(line), http))
-{
- ... process the line ...
-}
-</PRE>
-<H3><A NAME="10_46_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpUpdate">
-<CODE>httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpGetDateString">httpGetDateString()</A></H2>
-<H3><A NAME="10_47_1">Usage</A></H3>
-<PRE>
-const char *httpGetDateString(time_t time)
-</PRE>
-<H3><A NAME="10_47_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>time</TD><TD>The UNIX date/time value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_47_3">Returns</A></H3>
-<P>A pointer to a static string containing the HTTP date/time string
-for the specified UNIX time value. </P>
-<H3><A NAME="10_47_4">Description</A></H3>
-<P>The <CODE>httpGetDateString()</CODE> function generates a date/time
-string suitable for HTTP requests from a UNIX time value. </P>
-<H3><A NAME="10_47_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-puts(httpGetDateString(time(NULL)));
-</PRE>
-<H3><A NAME="10_47_6">See Also</A></H3>
-<A HREF="#httpGetDateTime"><CODE> httpGetDateTime()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpGetDateTime">httpGetDateTime()</A></H2>
-<H3><A NAME="10_48_1">Usage</A></H3>
-<PRE>
-time_t httpGetDateTime(const char *date)
-</PRE>
-<H3><A NAME="10_48_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>date</TD><TD>The HTTP date/time string</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_48_3">Returns</A></H3>
-<P>A UNIX time value. </P>
-<H3><A NAME="10_48_4">Description</A></H3>
-<P>The <CODE>httpGetDateTime()</CODE> function converts a HTTP
-date/time string to a UNIX time value. </P>
-<H3><A NAME="10_48_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-printf("%d\n", httpGetDateTime("Fri, 30 June 2000 12:34:56 GMT"));
-</PRE>
-<H3><A NAME="10_48_6">See Also</A></H3>
-<A HREF="#httpGetDateString"><CODE> httpGetDateString()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpGetField">httpGetField()</A></H2>
-<H3><A NAME="10_49_1">Usage</A></H3>
-<PRE>
-const char *httpGetField(http_t *http, http_field_t field);
-</PRE>
-<H3><A NAME="10_49_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>field</TD><TD>The HTTP field</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_49_3">Returns</A></H3>
-<P>A pointer to the field value string. </P>
-<H3><A NAME="10_49_4">Description</A></H3>
-<P>The <CODE>httpGetField()</CODE> function returns the current value
-for the specified HTTP field. </P>
-<H3><A NAME="10_49_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpGet(http, "/some/uri");
-while (httpUpdate(http) == HTTP_CONTINUE);
-
-puts(httpGetField(http, HTTP_FIELD_CONTENT_TYPE));
-</PRE>
-<H3><A NAME="10_49_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpHead">httpHead()</A></H2>
-<H3><A NAME="10_50_1">Usage</A></H3>
-<PRE>
-int httpHead(http_t *http, const char *uri);
-</PRE>
-<H3><A NAME="10_50_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>uri</TD><TD>The URI to head</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_50_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_50_4">Description</A></H3>
-<P>The <CODE>httpHead()</CODE> function sends a HTTP HEAD request to
-the server. </P>
-<H3><A NAME="10_50_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpHead(http, "/some/uri");
-</PRE>
-<H3><A NAME="10_50_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>, <A HREF="#httpUpdate"><CODE>
-httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpInitialize">httpInitialize()</A></H2>
-<H3><A NAME="10_51_1">Usage</A></H3>
-<PRE>
-void httpInitialize(void);
-</PRE>
-<H3><A NAME="10_51_2">Description</A></H3>
-<P>The <CODE>httpInitialize()</CODE> function initializes the
-networking code as needed by the underlying platform. It is called
-automatically by the <CODE>httpConnect()</CODE> function. </P>
-<H3><A NAME="10_51_3">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-httpInitialize();
-</PRE>
-<H3><A NAME="10_51_4">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpOptions">httpOptions()</A></H2>
-<H3><A NAME="10_52_1">Usage</A></H3>
-<PRE>
-int httpOptions(http_t *http, const char *uri);
-</PRE>
-<H3><A NAME="10_52_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>uri</TD><TD>The URI to check for options</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_52_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_52_4">Description</A></H3>
-<P>The <CODE>httpOptions()</CODE> function sends a HTTP OPTIONS request
-to the server. </P>
-<H3><A NAME="10_52_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpOptions(http, "/some/uri");
-</PRE>
-<H3><A NAME="10_52_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>, <A HREF="#httpUpdate"><CODE>
-httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpPost">httpPost()</A></H2>
-<H3><A NAME="10_53_1">Usage</A></H3>
-<PRE>
-int httpPost(http_t *http, const char *uri);
-</PRE>
-<H3><A NAME="10_53_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>uri</TD><TD>The URI to post to</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_53_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_53_4">Description</A></H3>
-<P>The <CODE>httpPost()</CODE> function sends a HTTP POST request to
-the server. </P>
-<H3><A NAME="10_53_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpPost(http, "/some/uri");
-</PRE>
-<H3><A NAME="10_53_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>, <A HREF="#httpUpdate"><CODE>
-httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpPrintf">httpPrintf()</A></H2>
-<H3><A NAME="10_54_1">Usage</A></H3>
-<PRE>
-int httpPrintf(http_t *http, const char *format, ...);
-</PRE>
-<H3><A NAME="10_54_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>format</TD><TD>A printf-style format string</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_54_3">Returns</A></H3>
-<P>The number of bytes written. </P>
-<H3><A NAME="10_54_4">Description</A></H3>
-<P>The <CODE>httpPrintf()</CODE> function sends a formatted string to
-the HTTP connection. It is normally only used by the CUPS API and
-scheduler. </P>
-<H3><A NAME="10_54_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpPrintf(http, "GET / HTTP/1.1 \r\n");
-</PRE>
-<H3><A NAME="10_54_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpPut">httpPut()</A></H2>
-<H3><A NAME="10_55_1">Usage</A></H3>
-<PRE>
-int httpPut(http_t *http, const char *uri);
-</PRE>
-<H3><A NAME="10_55_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>uri</TD><TD>The URI to put</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_55_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_55_4">Description</A></H3>
-<P>The <CODE>httpPut()</CODE> function sends a HTTP PUT request to the
-server. </P>
-<H3><A NAME="10_55_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpDelete(http, "/some/uri");
-</PRE>
-<H3><A NAME="10_55_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>, <A HREF="#httpUpdate"><CODE>
-httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpRead">httpRead()</A></H2>
-<H3><A NAME="10_56_1">Usage</A></H3>
-<PRE>
-int httpRead(http_t *http, char *buffer, int length);
-</PRE>
-<H3><A NAME="10_56_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>buffer</TD><TD>The buffer to read into</TD></TR>
-<TR><TD>length</TD><TD>The number of bytes to read</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_56_3">Returns</A></H3>
-<P>The number of bytes read or -1 on error. </P>
-<H3><A NAME="10_56_4">Description</A></H3>
-<P>The <CODE>httpRead()</CODE> function reads data from the HTTP
-connection, possibly the result of a GET or POST request. </P>
-<H3><A NAME="10_56_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-char buffer[1024];
-int bytes;
-
-httpGet(http, "/");
-while (httpUpdate(http) != HTTP_CONTINUE);
-while ((bytes = httpRead(http, buffer, sizeof(buffer) - 1)) > 0)
-{
- buffer[bytes] = '\0';
- fputs(buffer, stdout);
-}
-</PRE>
-<H3><A NAME="10_56_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpWrite">
-<CODE>httpWrite()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpReconnect">httpReconnect()</A></H2>
-<H3><A NAME="10_57_1">Usage</A></H3>
-<PRE>
-int httpReconnect(http_t *http);
-</PRE>
-<H3><A NAME="10_57_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_57_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_57_4">Description</A></H3>
-<P>The <CODE>httpReconnect()</CODE> function reconnects to the HTTP
-server. This is usually done automatically if the HTTP functions detect
-that the server connection has terminated. </P>
-<H3><A NAME="10_57_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpReconnect(http);
-</PRE>
-<H3><A NAME="10_57_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpSeparate">httpSeparate()</A></H2>
-<H3><A NAME="10_58_1">Usage</A></H3>
-<PRE>
-void httpSeparate(const char *uri, char *method,
- char *username, char *host, int *port,
- char *resource);
-</PRE>
-<H3><A NAME="10_58_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>uri</TD><TD>The URI to separate</TD></TR>
-<TR><TD>method</TD><TD>The method (scheme) of the URI</TD></TR>
-<TR><TD>username</TD><TD>The username (and password) portion of the
-URI, if any</TD></TR>
-<TR><TD>host</TD><TD>The hostname portion of the URI, if any</TD></TR>
-<TR><TD>port</TD><TD>The port number for the URI, either as specified
-or as default for the method/scheme</TD></TR>
-<TR><TD>resource</TD><TD>The resource string, usually a filename on the
-server</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_58_3">Description</A></H3>
-<P>The <CODE>httpSeparate()</CODE> function separates the specified URI
-into its component parts. The method, username, hostname, and resource
-strings should be at least <CODE>HTTP_MAX_URI</CODE> characters long to
-avoid potential buffer overflow problems. </P>
-<H3><A NAME="10_58_4">Example</A></H3>
-<PRE>
-char uri[HTTP_MAX_URI];
-char method[HTTP_MAX_URI];
-char username[HTTP_MAX_URI];
-char host[HTTP_MAX_URI];
-char resource[HTTP_MAX_URI];
-int port;
-
-httpSeparate(uri, method, username, host, &port, resource);
-</PRE>
-<H3><A NAME="10_58_5">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpSetField">httpSetField()</A></H2>
-<H3><A NAME="10_59_1">Usage</A></H3>
-<PRE>
-void httpSetField(http_t *http, http_field_t field, const char *value);
-</PRE>
-<H3><A NAME="10_59_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>field</TD><TD>The HTTP field</TD></TR>
-<TR><TD>value</TD><TD>The string value for the field</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_59_3">Description</A></H3>
-<P>The <CODE>httpSetField()</CODE> function sets the current value for
-the specified HTTP field. </P>
-<H3><A NAME="10_59_4">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpSetField(http, HTTP_FIELD_AUTHORIZATION, "Basic dfdr34453454325"));
-httpGet(http, "/some/uri");
-while (httpUpdate(http) == HTTP_CONTINUE);
-</PRE>
-<H3><A NAME="10_59_5">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpGetField">
-<CODE>httpGetField()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpTrace">httpTrace()</A></H2>
-<H3><A NAME="10_60_1">Usage</A></H3>
-<PRE>
-int httpTrace(http_t *http, const char *uri);
-</PRE>
-<H3><A NAME="10_60_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>uri</TD><TD>The URI to trace</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_60_3">Returns</A></H3>
-<P>0 on success, non-zero on failure. </P>
-<H3><A NAME="10_60_4">Description</A></H3>
-<P>The <CODE>httpTrace()</CODE> function sends a HTTP TRACE request to
-the server. </P>
-<H3><A NAME="10_60_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-
-httpTrace(http, "/some/uri");
-</PRE>
-<H3><A NAME="10_60_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpSetField">
-<CODE>httpSetField()</CODE></A>, <A HREF="#httpUpdate"><CODE>
-httpUpdate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpUpdate">httpUpdate()</A></H2>
-<H3><A NAME="10_61_1">Usage</A></H3>
-<PRE>
-http_status_t httpUpdate(http_t *http);
-</PRE>
-<H3><A NAME="10_61_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_61_3">Returns</A></H3>
-<P>The HTTP status of the current request. </P>
-<H3><A NAME="10_61_4">Description</A></H3>
-<P>The <CODE>httpUpdate()</CODE> function updates the current request
-status. It is used after any DELETE, GET, HEAD, OPTIONS, POST, PUT, or
-TRACE request to finalize the HTTP request and retrieve the request
-status. </P>
-<P>Since proxies and the current blocking mode can cause the request to
-take longer, programs should continue calling <CODE>httpUpdate()</CODE>
- until the return status is not the constant value <CODE>HTTP_CONTINUE</CODE>
-. </P>
-<H3><A NAME="10_61_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-http_status_t status;
-
-httpGet(http, "/some/uri");
-while ((status = httpUpdate(http)) == HTTP_CONTINUE);
-printf("Request status is %d\n", status);
-</PRE>
-<H3><A NAME="10_61_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpDelete">
-<CODE>httpDelete()</CODE></A>, <A HREF="#httpGet"><CODE>httpGet()</CODE></A>
-, <A HREF="#httpHead"><CODE>httpHead()</CODE></A>, <A HREF="#httpOptions">
-<CODE>httpOptions()</CODE></A>, <A HREF="#httpPost"><CODE>httpPost()</CODE>
-</A>, <A HREF="#httpPut"><CODE>httpPut()</CODE></A>, <A HREF="#httpTrace">
-<CODE>httpTrace()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="httpWrite">httpWrite()</A></H2>
-<H3><A NAME="10_62_1">Usage</A></H3>
-<PRE>
-int httpWrite(http_t *http, char *buffer, int length);
-</PRE>
-<H3><A NAME="10_62_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>buffer</TD><TD>The buffer to read into</TD></TR>
-<TR><TD>length</TD><TD>The number of bytes to read</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_62_3">Returns</A></H3>
-<P>The number of bytes read or -1 on error. </P>
-<H3><A NAME="10_62_4">Description</A></H3>
-<P>The <CODE>httpWrite()</CODE> function reads data from the HTTP
-connection, possibly the result of a GET or POST request. </P>
-<H3><A NAME="10_62_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-
-http_t *http;
-FILE *fp;
-char buffer[1024];
-int bytes;
-
-httpPost(http, "/");
-
-while ((bytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
- httpWrite(http, buffer, bytes);
-
-while (httpUpdate(http) != HTTP_CONTINUE);
-
-while ((bytes = httpRead(http, buffer, sizeof(buffer) - 1)) > 0)
-{
- buffer[bytes] = '\0';
- fputs(buffer, stdout);
-}
-</PRE>
-<H3><A NAME="10_62_6">See Also</A></H3>
-<A HREF="#httpConnect"><CODE> httpConnect()</CODE></A>, <A HREF="#httpRead">
-<CODE>httpRead()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddBoolean">ippAddBoolean()</A></H2>
-<H3><A NAME="10_63_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddBoolean(ipp_t *ipp, ipp_tag_t group,
- const char *name, char value);
-</PRE>
-<H3><A NAME="10_63_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>value</TD><TD>The boolean value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_63_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_63_4">Description</A></H3>
-<P>The <CODE>ippAddBoolean()</CODE> function adds a single boolean
-attribute value to the specified IPP request. </P>
-<H3><A NAME="10_63_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippAddBoolean(ipp, IPP_TAG_OPERATION, "my-jobs", 1);
-</PRE>
-<H3><A NAME="10_63_6">See Also</A></H3>
-<A HREF="#ippAddBooleans"><CODE> ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate">
-<CODE>ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>
-ippAddInteger()</CODE></A>, <A HREF="#ippAddIntegers"><CODE>
-ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange"><CODE>ippAddRange()</CODE>
-</A>, <A HREF="#ippAddRanges"><CODE>ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution">
-<CODE>ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddBooleans">ippAddBooleans()</A></H2>
-<H3><A NAME="10_64_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddBooleans(ipp_t *ipp, ipp_tag_t group,
- const char *name, int num_values,
- const char *values);
-</PRE>
-<H3><A NAME="10_64_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>num_values</TD><TD>The number of values</TD></TR>
-<TR><TD>values</TD><TD>The boolean values</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_64_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_64_4">Description</A></H3>
-<P>The <CODE>ippAddBooleans()</CODE> function adds one or more boolean
-attribute values to the specified IPP request. If the <CODE>values</CODE>
- pointer is <CODE>NULL</CODE> then an array of <CODE>num_values</CODE>
- false values is created. </P>
-<H3><A NAME="10_64_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-char values[10];
-
-ippAddBooleans(ipp, IPP_TAG_OPERATION, "some-attribute", 10, values);
-</PRE>
-<H3><A NAME="10_64_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddDate">
-<CODE>ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>
-ippAddInteger()</CODE></A>, <A HREF="#ippAddIntegers"><CODE>
-ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange"><CODE>ippAddRange()</CODE>
-</A>, <A HREF="#ippAddRanges"><CODE>ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution">
-<CODE>ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddDate">ippAddDate()</A></H2>
-<H3><A NAME="10_65_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddDate(ipp_t *ipp, ipp_tag_t group,
- const char *name, ipp_uchar_t *value);
-</PRE>
-<H3><A NAME="10_65_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>value</TD><TD>The date value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_65_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_65_4">Description</A></H3>
-<P>The <CODE>ippAddDate()</CODE> function adds a single date-time
-attribute value to the specified IPP request. </P>
-<H3><A NAME="10_65_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippAddDate(ipp, IPP_TAG_OPERATION, "some-attribute",
- ippTimeToDate(time(NULL));
-</PRE>
-<H3><A NAME="10_65_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddInteger"><CODE>
-ippAddInteger()</CODE></A>, <A HREF="#ippAddIntegers"><CODE>
-ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange"><CODE>ippAddRange()</CODE>
-</A>, <A HREF="#ippAddRanges"><CODE>ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution">
-<CODE>ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>, <A HREF="#ippTimeToDate"><CODE>
-ippTimeToDate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddInteger">ippAddInteger()</A></H2>
-<H3><A NAME="10_66_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddInteger(ipp_t *ipp, ipp_tag_t group,
- ipp_tag_t tag, const char *name,
- int value);
-</PRE>
-<H3><A NAME="10_66_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>tag</TD><TD>The type of integer value (IPP_TAG_INTEGER or
-IPP_TAG_ENUM)</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>value</TD><TD>The integer value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_66_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_66_4">Description</A></H3>
-<P>The <CODE>ippAddInteger()</CODE> function adds a single integer
-attribute value to the specified IPP request. </P>
-<H3><A NAME="10_66_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippAddInteger(ipp, IPP_TAG_OPERATION, "limit", 100);
-</PRE>
-<H3><A NAME="10_66_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddIntegers"><CODE>
-ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange"><CODE>ippAddRange()</CODE>
-</A>, <A HREF="#ippAddRanges"><CODE>ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution">
-<CODE>ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddIntegers">ippAddIntegers()</A></H2>
-<H3><A NAME="10_67_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddIntegers(ipp_t *ipp, ipp_tag_t group,
- ipp_tag_t tag, const char *name,
- int num_values, const int *values);
-</PRE>
-<H3><A NAME="10_67_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>tag</TD><TD>The type of integer value (IPP_TAG_INTEGER or
-IPP_TAG_ENUM)</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>num_values</TD><TD>The number of values</TD></TR>
-<TR><TD>values</TD><TD>The integer values</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_67_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_67_4">Description</A></H3>
-<P>The <CODE>ippAddIntegers()</CODE> function adds one or more integer
-attribute values to the specified IPP request. If the <CODE>values</CODE>
- pointer is <CODE>NULL</CODE> then an array of <CODE>num_values</CODE>
- 0 values is created. </P>
-<H3><A NAME="10_67_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-int values[100];
-
-ippAddIntegers(ipp, IPP_TAG_OPERATION, "some-attribute", 100, values);
-</PRE>
-<H3><A NAME="10_67_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddRange"><CODE>ippAddRange()</CODE></A>, <A HREF="#ippAddRanges">
-<CODE>ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution"><CODE>
-ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddRange">ippAddRange()</A></H2>
-<H3><A NAME="10_68_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddRange(ipp_t *ipp, ipp_tag_t group,
- const char *name, int low,
- int high);
-</PRE>
-<H3><A NAME="10_68_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>low</TD><TD>The lower value</TD></TR>
-<TR><TD>high</TD><TD>The higher value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_68_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_68_4">Description</A></H3>
-<P>The <CODE>ippAddRange()</CODE> function adds a single range
-attribute value to the specified IPP request. </P>
-<H3><A NAME="10_68_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippAddRange(ipp, IPP_TAG_OPERATION, "page-ranges", 1, 10);
-</PRE>
-<H3><A NAME="10_68_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddIntegers"><CODE>ippAddIntegers()</CODE></A>, <A HREF="#ippAddRanges">
-<CODE>ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution"><CODE>
-ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddRanges">ippAddRanges()</A></H2>
-<H3><A NAME="10_69_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddRanges(ipp_t *ipp, ipp_tag_t group,
- const char *name, int num_values,
- const int *lows, const int *highs);
-</PRE>
-<H3><A NAME="10_69_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>num_values</TD><TD>The number of range values</TD></TR>
-<TR><TD>lows</TD><TD>The lower values</TD></TR>
-<TR><TD>highs</TD><TD>The higher values</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_69_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_69_4">Description</A></H3>
-<P>The <CODE>ippAddRanges()</CODE> function adds one or more range
-attribute values to the specified IPP request. If the <CODE>values</CODE>
- pointer is <CODE>NULL</CODE> then an array of <CODE>num_values</CODE>
- 0,0 ranges is created. </P>
-<H3><A NAME="10_69_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-int lows[2];
-int highs[2];
-
-ippAddRanges(ipp, IPP_TAG_OPERATION, "page-ranges", 2, lows, highs);
-</PRE>
-<H3><A NAME="10_69_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddIntegers"><CODE>ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange">
-<CODE>ippAddRange()</CODE></A>, <A HREF="#ippAddResolution"><CODE>
-ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddResolution">ippAddResolution()</A></H2>
-<H3><A NAME="10_70_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddResolution(ipp_t *ipp, ipp_tag_t group,
- const char *name, int xres,
- int yres, ipp_res_t units);
-</PRE>
-<H3><A NAME="10_70_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>xres</TD><TD>The horizontal resolution</TD></TR>
-<TR><TD>yres</TD><TD>The vertical resolution</TD></TR>
-<TR><TD>units</TD><TD>The resolution units</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_70_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_70_4">Description</A></H3>
-<P>The <CODE>ippAddResolution()</CODE> function adds a single
-resolution attribute value to the specified IPP request. </P>
-<H3><A NAME="10_70_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippAddBoolean(ipp, IPP_TAG_OPERATION, "printer-resolution",
- 720, 720, IPP_RES_PER_INCH);
-</PRE>
-<H3><A NAME="10_70_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddIntegers"><CODE>ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange">
-<CODE>ippAddRange()</CODE></A>, <A HREF="#ippAddRanges"><CODE>
-ippAddRanges()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddResolutions">ippAddResolutions()</A></H2>
-<H3><A NAME="10_71_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddResolutions(ipp_t *ipp, ipp_tag_t group,
- const char *name, int num_values,
- const int *xres, const int *yres,
- const ipp_res_t *units);
-</PRE>
-<H3><A NAME="10_71_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>num_values</TD><TD>The number of resolution values</TD></TR>
-<TR><TD>xres</TD><TD>The horizontal resolutions</TD></TR>
-<TR><TD>yres</TD><TD>The vertical resolutions</TD></TR>
-<TR><TD>units</TD><TD>The resolution units</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_71_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_71_4">Description</A></H3>
-<P>The <CODE>ippAddResolutions()</CODE> function adds one or more
-resolution attribute values to the specified IPP request. If the <CODE>
-values</CODE> pointer is <CODE>NULL</CODE> then an array of <CODE>
-num_values</CODE> 0,0 resolutions is created. </P>
-<H3><A NAME="10_71_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-int xres[5];
-int yres[5];
-ipp_res_t units[5];
-
-ippAddBoolean(ipp, IPP_TAG_OPERATION, "printer-resolutions-supported",
- 5, xres, yres, units);
-</PRE>
-<H3><A NAME="10_71_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddIntegers"><CODE>ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange">
-<CODE>ippAddRange()</CODE></A>, <A HREF="#ippAddRanges"><CODE>
-ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution"><CODE>
-ippAddResolution()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddSeparator">ippAddSeparator()</A></H2>
-<H3><A NAME="10_72_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddSeparator(ipp_t *ipp);
-</PRE>
-<H3><A NAME="10_72_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_72_3">Returns</A></H3>
-<P>A pointer to the new separator or NULL if the separator could not be
-created. </P>
-<H3><A NAME="10_72_4">Description</A></H3>
-<P>The <CODE>ippAddSeparator()</CODE> function adds a group separator
-to the specified IPP request. </P>
-<H3><A NAME="10_72_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippAddSeparator(ipp);
-</PRE>
-<H3><A NAME="10_72_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddIntegers"><CODE>ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange">
-<CODE>ippAddRange()</CODE></A>, <A HREF="#ippAddRanges"><CODE>
-ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution"><CODE>
-ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddString">ippAddString()</A></H2>
-<H3><A NAME="10_73_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddString(ipp_t *ipp, ipp_tag_t group,
- ipp_tag_t tag, const char *name,
- const char *charset, const char *value);
-</PRE>
-<H3><A NAME="10_73_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>tag</TD><TD>The type of string value</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>charset</TD><TD>The character set for the string</TD></TR>
-<TR><TD>value</TD><TD>The string value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_73_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_73_4">Description</A></H3>
-<P>The <CODE>ippAddString()</CODE> function adds a single string
-attribute value to the specified IPP request. For <CODE>IPP_TAG_NAMELANG</CODE>
- and <CODE>IPP_TAG_TEXTLANG</CODE> strings, the charset value is
-provided with the string to identify the string encoding used.
-Otherwise the charset value is ignored. </P>
-<H3><A NAME="10_73_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippAddString(ipp, IPP_TAG_OPERATION, IPP_TAG_NAME, "job-name",
- NULL, "abc123");
-</PRE>
-<H3><A NAME="10_73_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddIntegers"><CODE>ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange">
-<CODE>ippAddRange()</CODE></A>, <A HREF="#ippAddRanges"><CODE>
-ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution"><CODE>
-ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddStrings"><CODE>
-ippAddStrings()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippAddStrings">ippAddStrings()</A></H2>
-<H3><A NAME="10_74_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippAddStrings(ipp_t *ipp, ipp_tag_t group,
- ipp_tag_t tag, const char *name,
- int num_values, const char *charset,
- const char **values);
-</PRE>
-<H3><A NAME="10_74_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request</TD></TR>
-<TR><TD>group</TD><TD>The IPP group</TD></TR>
-<TR><TD>tag</TD><TD>The type of string value</TD></TR>
-<TR><TD>name</TD><TD>The name of attribute</TD></TR>
-<TR><TD>num_values</TD><TD>The number of strings</TD></TR>
-<TR><TD>charset</TD><TD>The character set for the strings</TD></TR>
-<TR><TD>values</TD><TD>The string values</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_74_3">Returns</A></H3>
-<P>A pointer to the new attribute or NULL if the attribute could not be
-created. </P>
-<H3><A NAME="10_74_4">Description</A></H3>
-<P>The <CODE>ippAddStrings()</CODE> function adds one or more string
-attribute values to the specified IPP request. For <CODE>
-IPP_TAG_NAMELANG</CODE> and <CODE>IPP_TAG_TEXTLANG</CODE> strings, the
-charset value is provided with the strings to identify the string
-encoding used. Otherwise the charset value is ignored. If the <CODE>
-values</CODE> pointer is <CODE>NULL</CODE> then an array of <CODE>
-num_values</CODE> NULL strings is created. </P>
-<H3><A NAME="10_74_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-char *values[2] = { "one", "two" };
-
-ippAddStrings(ipp, IPP_TAG_OPERATION, IPP_TAG_KEYWORD, "attr-name",
- 2, NULL, values);
-</PRE>
-<H3><A NAME="10_74_6">See Also</A></H3>
-<A HREF="#ippAddBoolean"><CODE> ippAddBoolean()</CODE></A>, <A HREF="#ippAddBooleans">
-<CODE>ippAddBooleans()</CODE></A>, <A HREF="#ippAddDate"><CODE>
-ippAddDate()</CODE></A>, <A HREF="#ippAddInteger"><CODE>ippAddInteger()</CODE>
-</A>, <A HREF="#ippAddIntegers"><CODE>ippAddIntegers()</CODE></A>, <A HREF="#ippAddRange">
-<CODE>ippAddRange()</CODE></A>, <A HREF="#ippAddRanges"><CODE>
-ippAddRanges()</CODE></A>, <A HREF="#ippAddResolution"><CODE>
-ippAddResolution()</CODE></A>, <A HREF="#ippAddResolutions"><CODE>
-ippAddResolutions()</CODE></A>, <A HREF="#ippAddSeparator"><CODE>
-ippAddSeparator()</CODE></A>, <A HREF="#ippAddString"><CODE>
-ippAddString()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippDateToTime">ippDateToTime()</A></H2>
-<H3><A NAME="10_75_1">Usage</A></H3>
-<PRE>
-time_t ippDateToTime(const ipp_uchar_t date[11]);
-</PRE>
-<H3><A NAME="10_75_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>date</TD><TD>The IPP date-time value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_75_3">Returns</A></H3>
-<P>A UNIX time value. </P>
-<H3><A NAME="10_75_4">Description</A></H3>
-<P>The <CODE>ippDateToTime()</CODE> function converts an IPP date-time
-value to a UNIX time value. </P>
-<H3><A NAME="10_75_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_uchar_t date[11];
-
-printf("UNIX time is %d\n", ippDateToTime(date));
-</PRE>
-<H3><A NAME="10_75_6">See Also</A></H3>
-<A HREF="#ippTimeToDate"><CODE> ippTimeToDate()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippDelete">ippDelete()</A></H2>
-<H3><A NAME="10_76_1">Usage</A></H3>
-<PRE>
-void ippDelete(ipp_t *ipp);
-</PRE>
-<H3><A NAME="10_76_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request or response</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_76_3">Description</A></H3>
-<P>The <CODE>ippDelete()</CODE> function deletes all memory used by an
-IPP request or response. </P>
-<H3><A NAME="10_76_4">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ippDelete(ipp);
-</PRE>
-<H3><A NAME="10_76_5">See Also</A></H3>
-<A HREF="#ippNew"><CODE> ippNew()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippFindAttribute">ippFindAttribute()</A></H2>
-<H3><A NAME="10_77_1">Usage</A></H3>
-<PRE>
-ipp_attribute_t *ippFindAttribute(ipp_t *ipp, const char *name, ipp_tag_t tag);
-</PRE>
-<H3><A NAME="10_77_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request or response</TD></TR>
-<TR><TD>name</TD><TD>The name of the attribute</TD></TR>
-<TR><TD>tag</TD><TD>The required value tag for the attribute or <CODE>
- IPP_TAG_ZERO</CODE> for any type of value.</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_77_3">Returns</A></H3>
-<P>A pointer to the first occurrence of the requested attribute, or <CODE>
-NULL</CODE> if it was not found. </P>
-<H3><A NAME="10_77_4">Description</A></H3>
-<P><CODE>ippFindAttribute()</CODE> finds the first occurrence of the
-named attribute. The <CODE>tag</CODE> parameter restricts the search to
-a specific value type - use <CODE>IPP_TAG_ZERO</CODE> to find any value
-with the name. </P>
-<P>The value tags <CODE>IPP_TAG_NAME</CODE> and <CODE>IPP_TAG_TEXT</CODE>
- match the name/text values with or without the language code. </P>
-<H3><A NAME="10_77_5">Example</A></H3>
-<PRE>
-ipp_attribute_t *attr;
-
-attr = ippFindAttribute(response, "printer-state-message", IPP_TAG_TEXT);
-</PRE>
-<H3><A NAME="10_77_6">See Also</A></H3>
-<A HREF="#cupsDoFileRequest"><CODE> cupsDoFileRequest()</CODE></A>, <A HREF="#cupsDoRequest">
-<CODE>cupsDoRequest()</CODE></A>, <A HREF="#ippDelete"><CODE>ippDelete()</CODE>
-</A>, <A HREF="#ippNew"><CODE>ippNew()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippLength">ippLength()</A></H2>
-<H3><A NAME="10_78_1">Usage</A></H3>
-<PRE>
-int ippLength(ipp_t *ipp);
-</PRE>
-<H3><A NAME="10_78_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ipp</TD><TD>The IPP request or response</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_78_3">Returns</A></H3>
-<P>The total encoded length of the IPP request or response in bytes. </P>
-<H3><A NAME="10_78_4">Description</A></H3>
-<P><CODE>ippLength()</CODE> returns the length of the IPP request or
-response in bytes. </P>
-<H3><A NAME="10_78_5">Example</A></H3>
-<PRE>
-printf("The length of the response is %d bytes.\n", ippLength(response));
-</PRE>
-<H3><A NAME="10_78_6">See Also</A></H3>
-<A HREF="#ippDelete"><CODE> ippDelete()</CODE></A>, <A HREF="#ippNew"><CODE>
-ippNew()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippNew">ippNew()</A></H2>
-<H3><A NAME="10_79_1">Usage</A></H3>
-<PRE>
-ipp_t *ippNew(void);
-</PRE>
-<H3><A NAME="10_79_2">Returns</A></H3>
-<P>A pointer to a new IPP request or response. </P>
-<H3><A NAME="10_79_3">Description</A></H3>
-<P>The <CODE>ippNew()</CODE> function creates a new IPP request or
-response. </P>
-<H3><A NAME="10_79_4">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_t *ipp;
-
-ipp = ippNew();
-</PRE>
-<H3><A NAME="10_79_5">See Also</A></H3>
-<A HREF="#ippDelete"><CODE> ippDelete()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippPort">ippPort()</A></H2>
-<H3><A NAME="10_80_1">Usage</A></H3>
-<PRE>
-int ippPort(void);
-</PRE>
-<H3><A NAME="10_80_2">Returns</A></H3>
-<P>The default TCP/IP port number for IPP requests. </P>
-<H3><A NAME="10_80_3">Description</A></H3>
-<P>The <CODE>ippPort()</CODE> function returns the default IPP port
-number for requests. </P>
-<H3><A NAME="10_80_4">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-#include <cups/ipp.h>
-
-http_t *http;
-
-http = httpConnect(cupsServer(), ippPort());
-</PRE>
-<H3><A NAME="10_80_5">See Also</A></H3>
-<A HREF="#cupsServer"><CODE> cupsServer()</CODE></A>, <A HREF="#ippSetPort">
-<CODE>ippSetPort()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippRead">ippRead()</A></H2>
-<H3><A NAME="10_81_1">Usage</A></H3>
-<PRE>
-ipp_state_t ippRead(http_t *http, ipp_t *ipp);
-</PRE>
-<H3><A NAME="10_81_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>ipp</TD><TD>The IPP request or response</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_81_3">Returns</A></H3>
-<P>The current read state. </P>
-<H3><A NAME="10_81_4">Description</A></H3>
-<P>The <CODE>ippRead()</CODE> function reads IPP attributes from the
-specified HTTP connection. Programs should continue calling <CODE>
-ippRead()</CODE> until <CODE>IPP_ERROR</CODE> or <CODE>IPP_DATA</CODE>
- is returned. </P>
-<H3><A NAME="10_81_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-#include <cups/ipp.h>
-
-http_t *http;
-ipp_t *ipp;
-ipp_state_t status;
-
-ipp = ippNew();
-
-while ((status = ippRead(http, ipp)) != IPP_ERROR)
- if (status == IPP_DATA)
- break;
-
-if (status == IPP_DATA)
-{
- ... read additional non-IPP data using httpRead() ...
-}
-</PRE>
-<H3><A NAME="10_81_6">See Also</A></H3>
-<A HREF="#ippWrite"><CODE> ippWrite()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippSetPort">ippSetPort()</A></H2>
-<H3><A NAME="10_82_1">Usage</A></H3>
-<PRE>
-void
-ippSetPort(int port);
-</PRE>
-<H3><A NAME="10_82_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>port</TD><TD>The port number to use</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_82_3">Description</A></H3>
-<P>The <CODE>ippSetPort()</CODE> function sets the default IPP port
-number for requests. </P>
-<H3><A NAME="10_82_4">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-#include <cups/ipp.h>
-
-...
-
-ippSetPort(8631);
-</PRE>
-<H3><A NAME="10_82_5">See Also</A></H3>
-<A HREF="#ippPort"><CODE> ippPort()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippTimeToDate">ippTimeToDate()</A></H2>
-<H3><A NAME="10_83_1">Usage</A></H3>
-<PRE>
-ipp_uchar_t *ippTimeToDate(time_t time);
-</PRE>
-<H3><A NAME="10_83_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>time</TD><TD>The UNIX time value</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_83_3">Returns</A></H3>
-<P>A static pointer to an IPP date-time value. </P>
-<H3><A NAME="10_83_4">Description</A></H3>
-<P>The <CODE>ippTimeToDate()</CODE> function converts a UNIX time to an
-IPP date-time value. </P>
-<H3><A NAME="10_83_5">Example</A></H3>
-<PRE>
-#include <cups/ipp.h>
-
-ipp_uchar_t *date;
-
-date = ippTimeToDate(time(NULL));
-</PRE>
-<H3><A NAME="10_83_6">See Also</A></H3>
-<A HREF="#ippDateToTime"><CODE> ippDateToTime()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ippWrite">ippWrite()</A></H2>
-<H3><A NAME="10_84_1">Usage</A></H3>
-<PRE>
-ipp_state_t ippWrite(http_t *http, ipp_t *ipp);
-</PRE>
-<H3><A NAME="10_84_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>http</TD><TD>The HTTP connection</TD></TR>
-<TR><TD>ipp</TD><TD>The IPP request or response</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_84_3">Returns</A></H3>
-<P>The current write state. </P>
-<H3><A NAME="10_84_4">Description</A></H3>
-<P>The <CODE>ippWrite()</CODE> function writes IPP attributes to the
-specified HTTP connection. Programs should continue calling <CODE>
-ippWrite()</CODE> until <CODE>IPP_ERROR</CODE> or <CODE>IPP_DATA</CODE>
- is returned. </P>
-<H3><A NAME="10_84_5">Example</A></H3>
-<PRE>
-#include <cups/http.h>
-#include <cups/ipp.h>
-
-http_t *http;
-ipp_t *ipp;
-ipp_state_t status;
-
-ipp = ippNew();
-... add attributes ...
-
-while ((status = ippWrite(http, ipp)) != IPP_ERROR)
- if (status == IPP_DATA)
- break;
-
-if (status == IPP_DATA)
-{
- ... read additional non-IPP data using httpWrite() ...
-}
-</PRE>
-<H3><A NAME="10_84_6">See Also</A></H3>
-<A HREF="#ippRead"><CODE> ippRead()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdClose">ppdClose()</A></H2>
-<H3><A NAME="10_85_1">Usage</A></H3>
-<PRE>
-void ppdClose(ppd_file_t *ppd);
-</PRE>
-<H3><A NAME="10_85_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_85_3">Description</A></H3>
-<P>The <CODE>ppdClose()</CODE> function frees all memory associated
-with the PPD file. </P>
-<H3><A NAME="10_85_4">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-ppdClose(ppd);
-</PRE>
-<H3><A NAME="10_85_5">See Also</A></H3>
-<A HREF="#ppdOpen"><CODE> ppdOpen()</CODE></A>, <A HREF="#ppdOpenFd"><CODE>
-ppdOpenFd()</CODE></A>, <A HREF="#ppdOpenFile"><CODE>ppdOpenFile()</CODE>
-</A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdConflicts">ppdConflicts()</A></H2>
-<H3><A NAME="10_86_1">Usage</A></H3>
-<PRE>
-int ppdConflicts(ppd_file_t *ppd);
-</PRE>
-<H3><A NAME="10_86_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_86_3">Returns</A></H3>
-<P>The number of option conflicts in the file. </P>
-<H3><A NAME="10_86_4">Description</A></H3>
-<P>The <CODE>ppdConflicts()</CODE> function returns the number of
-conflicts with the currently selected options. </P>
-<H3><A NAME="10_86_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-printf("%d conflicts\n", ppdConflicts(ppd));
-</PRE>
-<H3><A NAME="10_86_6">See Also</A></H3>
-<A HREF="#cupsMarkOptions"><CODE> cupsMarkOptions()</CODE></A>, <A HREF="#ppdIsMarked">
-<CODE>ppdIsMarked()</CODE></A>, <A HREF="#ppdMarkDefaults"><CODE>
-ppdMarkDefaults()</CODE></A>, <A HREF="#ppdMarkOption"><CODE>
-ppdMarkOption()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdEmit">ppdEmit()</A></H2>
-<H3><A NAME="10_87_1">Usage</A></H3>
-<PRE>
-int ppdEmit(ppd_file_t *ppd, FILE *file, ppd_section_t section);
-</PRE>
-<H3><A NAME="10_87_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>file</TD><TD>The file to write to</TD></TR>
-<TR><TD>section</TD><TD>The option section to write</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_87_3">Returns</A></H3>
-<P>0 on success, -1 on error. </P>
-<H3><A NAME="10_87_4">Description</A></H3>
-<P>The <CODE>ppdEmit()</CODE> function sends printer-specific option
-commands to the specified file. </P>
-<H3><A NAME="10_87_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-ppdEmit(ppd, stdout, PPD_ORDER_PAGE);
-</PRE>
-<H3><A NAME="10_87_6">See Also</A></H3>
-<A HREF="#ppdEmitFd"><CODE> ppdEmitFd()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdEmitFd">ppdEmitFd()</A></H2>
-<H3><A NAME="10_88_1">Usage</A></H3>
-<PRE>
-int ppdEmitFd(ppd_file_t *ppd, int fd, ppd_section_t section);
-</PRE>
-<H3><A NAME="10_88_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>fd</TD><TD>The file descriptor to write to</TD></TR>
-<TR><TD>section</TD><TD>The option section to write</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_88_3">Returns</A></H3>
-<P>0 on success, -1 on error. </P>
-<H3><A NAME="10_88_4">Description</A></H3>
-<P>The <CODE>ppdEmitFd()</CODE> function sends printer-specific option
-commands to the specified file descriptor. </P>
-<H3><A NAME="10_88_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-ppdEmitFd(ppd, 1, PPD_ORDER_PAGE);
-</PRE>
-<H3><A NAME="10_88_6">See Also</A></H3>
-<A HREF="#ppdEmit"><CODE> ppdEmit()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdFindChoice">ppdFindChoice()</A></H2>
-<H3><A NAME="10_89_1">Usage</A></H3>
-<PRE>
-ppd_choice_t *ppdFindChoice(ppd_option_t *option, const char *choice);
-</PRE>
-<H3><A NAME="10_89_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>option</TD><TD>A pointer to the option</TD></TR>
-<TR><TD>choice</TD><TD>The name of the choice</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_89_3">Returns</A></H3>
-<P>A pointer to the choice data or NULL if the choice does not exist. </P>
-<H3><A NAME="10_89_4">Description</A></H3>
-<P>The <CODE>ppdFindChoice()</CODE> function returns a pointer to the
-choice data for the specified option. </P>
-<H3><A NAME="10_89_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-ppd_option_t *option;
-ppd_choice_t *choice;
-
-option = ppdFindOption(ppd, "PageSize");
-choice = ppdFindChoice(option, "Letter");
-</PRE>
-<H3><A NAME="10_89_6">See Also</A></H3>
-<A HREF="#ppdFindMarkedChoice"><CODE> ppdFindMarkedChoice()</CODE></A>, <A
-HREF="#ppdFindOption"><CODE>ppdFindOption()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdFindMarkedChoice">ppdFindMarkedChoice()</A></H2>
-<H3><A NAME="10_90_1">Usage</A></H3>
-<PRE>
-ppd_choice_t *ppdFindMarkedChoice(ppd_file_t *ppd, const char *keyword);
-</PRE>
-<H3><A NAME="10_90_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>keyword</TD><TD>The name of the option</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_90_3">Returns</A></H3>
-<P>A pointer to the choice data or NULL if the choice does not exist or
-is not marked. </P>
-<H3><A NAME="10_90_4">Description</A></H3>
-<P>The <CODE>ppdFindMarkedChoice()</CODE> function returns a pointer to
-the marked choice data for the specified option. </P>
-<H3><A NAME="10_90_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-ppd_choice_t *choice;
-
-choice = ppdFindMarkedChoice(ppd, "PageSize");
-</PRE>
-<H3><A NAME="10_90_6">See Also</A></H3>
-<A HREF="#ppdFindChoice"><CODE> ppdFindChoice()</CODE></A>, <A HREF="#ppdFindOption">
-<CODE>ppdFindOption()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdFindOption">ppdFindOption()</A></H2>
-<H3><A NAME="10_91_1">Usage</A></H3>
-<PRE>
-ppd_option_t *ppdFindOption(ppd_file_t *ppd, const char *keyword);
-</PRE>
-<H3><A NAME="10_91_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>keyword</TD><TD>The name of the option</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_91_3">Returns</A></H3>
-<P>A pointer to the option data or NULL if the option does not exist. </P>
-<H3><A NAME="10_91_4">Description</A></H3>
-<P>The <CODE>ppdFindOption()</CODE> function returns a pointer to the
-option data for the specified option. </P>
-<H3><A NAME="10_91_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-ppd_option_t *option;
-
-option = ppdFindOption(ppd, "PageSize");
-</PRE>
-<H3><A NAME="10_91_6">See Also</A></H3>
-<A HREF="#ppdFindChoice"><CODE> ppdFindChoice()</CODE></A>, <A HREF="#ppdFindMarkedChoice">
-<CODE>ppdFindMarkedChoice()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdIsMarked">ppdIsMarked()</A></H2>
-<H3><A NAME="10_92_1">Usage</A></H3>
-<PRE>
-int ppdIsMarked(ppd_file_t *ppd, const char *keyword, char char *choice);
-</PRE>
-<H3><A NAME="10_92_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>keyword</TD><TD>The name of the option</TD></TR>
-<TR><TD>choice</TD><TD>The name of the option choice</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_92_3">Returns</A></H3>
-<P>1 if the choice is marked, 0 otherwise. </P>
-<H3><A NAME="10_92_4">Description</A></H3>
-<P>The <CODE>ppdIsMarked()</CODE> function returns whether or not the
-specified option choice is marked. </P>
-<H3><A NAME="10_92_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-printf("Letter size %s selected.\n",
- ppdIsMarked(ppd, "PageSize", "Letter") ? "is" : "is not");
-</PRE>
-<H3><A NAME="10_92_6">See Also</A></H3>
-<A HREF="#cupsMarkOptions"><CODE> cupsMarkOptions()</CODE></A>, <A HREF="#ppdConflicts">
-<CODE>ppdConflicts()</CODE></A>, <A HREF="#ppdIsMarked"><CODE>
-ppdIsMarked()</CODE></A>, <A HREF="#ppdMarkDefaults"><CODE>
-ppdMarkDefaults()</CODE></A>, <A HREF="#ppdMarkOption"><CODE>
-ppdMarkOption()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdMarkDefaults">ppdMarkDefaults()</A></H2>
-<H3><A NAME="10_93_1">Usage</A></H3>
-<PRE>
-void ppdMarkDefaults(ppd_file_t *ppd);
-</PRE>
-<H3><A NAME="10_93_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_93_3">Description</A></H3>
-<P>The <CODE>ppdMarkDefaults()</CODE> function marks all of the default
-choices in the PPD file. </P>
-<H3><A NAME="10_93_4">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-ppdMarkDefaults(ppd);
-</PRE>
-<H3><A NAME="10_93_5">See Also</A></H3>
-<A HREF="#cupsMarkOptions"><CODE> cupsMarkOptions()</CODE></A>, <A HREF="#ppdConflicts">
-<CODE>ppdConflicts()</CODE></A>, <A HREF="#ppdIsMarked"><CODE>
-ppdIsMarked()</CODE></A>, <A HREF="#ppdMarkDefaults"><CODE>
-ppdMarkDefaults()</CODE></A>, <A HREF="#ppdMarkOption"><CODE>
-ppdMarkOption()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdMarkOption">ppdMarkOption()</A></H2>
-<H3><A NAME="10_94_1">Usage</A></H3>
-<PRE>
-int ppdMarkOption(ppd_file_t *ppd, const char *keyword, const char *choice);
-</PRE>
-<H3><A NAME="10_94_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>keyword</TD><TD>The name of the option</TD></TR>
-<TR><TD>choice</TD><TD>The name of the choice</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_94_3">Returns</A></H3>
-<P>The number of conflicts in the PPD file. </P>
-<H3><A NAME="10_94_4">Description</A></H3>
-<P>The <CODE>ppdMarkOption()</CODE> function marks the specified option
-choice. </P>
-<H3><A NAME="10_94_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-ppdMarkOption(ppd, "PageSize", "Letter");
-</PRE>
-<H3><A NAME="10_94_6">See Also</A></H3>
-<A HREF="#cupsMarkOptions"><CODE> cupsMarkOptions()</CODE></A>, <A HREF="#ppdConflicts">
-<CODE>ppdConflicts()</CODE></A>, <A HREF="#ppdIsMarked"><CODE>
-ppdIsMarked()</CODE></A>, <A HREF="#ppdMarkDefaults"><CODE>
-ppdMarkDefaults()</CODE></A>, <A HREF="#ppdMarkOption"><CODE>
-ppdMarkOption()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdOpen">ppdOpen()</A></H2>
-<H3><A NAME="10_95_1">Usage</A></H3>
-<PRE>
-ppd_file_t *ppdOpen(FILE *file);
-</PRE>
-<H3><A NAME="10_95_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>file</TD><TD>The file to read from</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_95_3">Returns</A></H3>
-<P>A pointer to a PPD file structure or NULL if the PPD file could not
-be read. </P>
-<H3><A NAME="10_95_4">Description</A></H3>
-<P>The <CODE>ppdOpen()</CODE> function reads a PPD file from the
-specified file into memory. </P>
-<H3><A NAME="10_95_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-FILE *file;
-
-file = fopen("filename.ppd", "rb");
-ppd = ppdOpen(file);
-fclose(file);
-</PRE>
-<H3><A NAME="10_95_6">See Also</A></H3>
-<A HREF="#ppdClose"><CODE> ppdClose()</CODE></A>, <A HREF="#ppdOpenFd"><CODE>
-ppdOpenFd()</CODE></A>, <A HREF="#ppdOpenFile"><CODE>ppdOpenFile()</CODE>
-</A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdOpenFd">ppdOpenFd()</A></H2>
-<H3><A NAME="10_96_1">Usage</A></H3>
-<PRE>
-ppd_file_t *ppdOpenFd(int fd);
-</PRE>
-<H3><A NAME="10_96_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>fd</TD><TD>The file descriptor to read from</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_96_3">Returns</A></H3>
-<P>A pointer to a PPD file structure or NULL if the PPD file could not
-be read. </P>
-<H3><A NAME="10_96_4">Description</A></H3>
-<P>The <CODE>ppdOpenFd()</CODE> function reads a PPD file from the
-specified file descriptor into memory. </P>
-<H3><A NAME="10_96_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-int fd;
-
-fd = open("filename.ppd", O_RDONLY);
-ppd = ppdOpenFd(fd);
-close(fd);
-</PRE>
-<H3><A NAME="10_96_6">See Also</A></H3>
-<A HREF="#ppdClose"><CODE> ppdClose()</CODE></A>, <A HREF="#ppdOpen"><CODE>
-ppdOpen()</CODE></A>, <A HREF="#ppdOpenFile"><CODE>ppdOpenFile()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdOpenFile">ppdOpenFile()</A></H2>
-<H3><A NAME="10_97_1">Usage</A></H3>
-<PRE>
-ppd_file_t *ppdOpenFile(const char *filename);
-</PRE>
-<H3><A NAME="10_97_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>filename</TD><TD>The name of the file to read from</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_97_3">Returns</A></H3>
-<P>A pointer to a PPD file structure or NULL if the PPD file could not
-be read. </P>
-<H3><A NAME="10_97_4">Description</A></H3>
-<P>The <CODE>ppdOpenFile()</CODE> function reads a PPD file from the
-named file into memory. </P>
-<H3><A NAME="10_97_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-ppd = ppdOpenFile("filename.ppd");
-</PRE>
-<H3><A NAME="10_97_6">See Also</A></H3>
-<A HREF="#ppdClose"><CODE> ppdClose()</CODE></A>, <A HREF="#ppdOpen"><CODE>
-ppdOpen()</CODE></A>, <A HREF="#ppdOpenFd"><CODE>ppdOpenFd()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdPageLength">ppdPageLength()</A></H2>
-<H3><A NAME="10_98_1">Usage</A></H3>
-<PRE>
-float ppdPageLength(ppd_file_t *ppd, const char *name);
-</PRE>
-<H3><A NAME="10_98_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>name</TD><TD>The name of the page size</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_98_3">Returns</A></H3>
-<P>The length of the specified page size in points or 0 if the page
-size does not exist. </P>
-<H3><A NAME="10_98_4">Description</A></H3>
-<P>The <CODE>ppdPageLength()</CODE> function returns the page length of
-the specified page size. </P>
-<H3><A NAME="10_98_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-printf("Length = %.0f\n", ppdPageLength(ppd, "Letter"));
-</PRE>
-<H3><A NAME="10_98_6">See Also</A></H3>
-<A HREF="#ppdPageLength"><CODE> ppdPageLength()</CODE></A>, <A HREF="#ppdPageSize">
-<CODE>ppdPageSize()</CODE></A>, <A HREF="#ppdPageWidth"><CODE>
-ppdPageWidth()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdPageSize">ppdPageSize()</A></H2>
-<H3><A NAME="10_99_1">Usage</A></H3>
-<PRE>
-ppd_size_t *ppdPageSize(ppd_file_t *ppd, const char *name);
-</PRE>
-<H3><A NAME="10_99_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>name</TD><TD>The name of the page size</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_99_3">Returns</A></H3>
-<P>A pointer to the page size record of the specified page size in
-points or NULL if the page size does not exist. </P>
-<H3><A NAME="10_99_4">Description</A></H3>
-<P>The <CODE>ppdPageSize()</CODE> function returns the page size record
-for the specified page size. </P>
-<H3><A NAME="10_99_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-ppd_size_t *size;
-
-size = ppdPageSize(ppd, "Letter");
-if (size != NULL)
-{
- printf(" Width = %.0f\n", size->width);
- printf("Length = %.0f\n", size->length);
- printf(" Left = %.0f\n", size->left);
- printf(" Right = %.0f\n", size->right);
- printf("Bottom = %.0f\n", size->bottom);
- printf(" Top = %.0f\n", size->top);
-}
-</PRE>
-<H3><A NAME="10_99_6">See Also</A></H3>
-<A HREF="#ppdPageLength"><CODE> ppdPageLength()</CODE></A>, <A HREF="#ppdPageWidth">
-<CODE>ppdPageWidth()</CODE></A>
-<!-- NEW PAGE -->
-
-<H2><A NAME="ppdPageWidth">ppdPageWidth()</A></H2>
-<H3><A NAME="10_100_1">Usage</A></H3>
-<PRE>
-float ppdPageWidth(ppd_file_t *ppd, const char *name);
-</PRE>
-<H3><A NAME="10_100_2">Arguments</A></H3>
-<CENTER>
-<TABLE BORDER WIDTH="80%">
-<TR><TH>Argument</TH><TH>Description</TH></TR>
-<TR><TD>ppd</TD><TD>The PPD file</TD></TR>
-<TR><TD>name</TD><TD>The name of the page size</TD></TR>
-</TABLE>
-</CENTER>
-<H3><A NAME="10_100_3">Returns</A></H3>
-<P>The width of the specified page size in points or 0 if the page size
-does not exist. </P>
-<H3><A NAME="10_100_4">Description</A></H3>
-<P>The <CODE>ppdPageWidth()</CODE> function returns the page width of
-the specified page size. </P>
-<H3><A NAME="10_100_5">Example</A></H3>
-<PRE>
-#include <cups/ppd.h>
-
-ppd_file_t *ppd;
-
-printf("Width = %.0f\n", ppdPageWidth(ppd, "Letter"));
-</PRE>
-<H3><A NAME="10_100_6">See Also</A></H3>
-<A HREF="#ppdPageLength"><CODE> ppdPageLength()</CODE></A>, <A HREF="#ppdPageSize">
-<CODE>ppdPageSize()</CODE></A></BODY>
-</HTML>
projects / thirdparty / cups.git / commitdiff
