ppdc/ppdc-file.cxx

   1 //
   2 // "$Id: ppdc-file.cxx 3755 2012-03-30 05:59:14Z msweet $"
   3 //
   4 //   File class for the CUPS PPD Compiler.
   5 //
   6 //   Copyright 2007-2010 by Apple Inc.
   7 //   Copyright 2002-2005 by Easy Software Products.
   8 //
   9 //   These coded instructions, statements, and computer programs are the
  10 //   property of Apple Inc. and are protected by Federal copyright
  11 //   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12 //   which should have been included with this file.  If this file is
  13 //   file is missing or damaged, see the license at "http://www.cups.org/".
  14 //
  15 // Contents:
  16 //
  17 //   ppdcFile::ppdcFile()  - Create (open) a file.
  18 //   ppdcFile::~ppdcFile() - Delete (close) a file.
  19 //   ppdcFile::get()       - Get a character from a file.
  20 //   ppdcFile::peek()      - Look at the next character from a file.
  21 //
  22
  23 //
  24 // Include necessary headers...
  25 //
  26
  27 #include "ppdc-private.h"
  28
  29
  30 //
  31 // 'ppdcFile::ppdcFile()' - Create (open) a file.
  32 //
  33
  34 ppdcFile::ppdcFile(const char  *f,              // I - File to open
  35                    cups_file_t *ffp)            // I - File pointer to use
  36 {
  37   if (ffp)
  38   {
  39     fp = ffp;
  40     cupsFileRewind(fp);
  41   }
  42   else
  43     fp = cupsFileOpen(f, "r");
  44
  45   close_on_delete = !ffp;
  46   filename        = f;
  47   line            = 1;
  48
  49   if (!fp)
  50     _cupsLangPrintf(stderr, _("ppdc: Unable to open %s: %s"), f,
  51                     strerror(errno));
  52 }
  53
  54
  55 //
  56 // 'ppdcFile::~ppdcFile()' - Delete (close) a file.
  57 //
  58
  59 ppdcFile::~ppdcFile()
  60 {
  61   if (close_on_delete && fp)
  62     cupsFileClose(fp);
  63 }
  64
  65
  66 //
  67 // 'ppdcFile::get()' - Get a character from a file.
  68 //
  69
  70 int
  71 ppdcFile::get()
  72 {
  73   int   ch;                                     // Character from file
  74
  75
  76   // Return EOF if there is no open file...
  77   if (!fp)
  78     return (EOF);
  79
  80   // Get the character...
  81   ch = cupsFileGetChar(fp);
  82
  83   // Update the line number as needed...
  84   if (ch == '\n')
  85     line ++;
  86
  87   // Return the character...
  88   return (ch);
  89 }
  90
  91
  92 //
  93 // 'ppdcFile::peek()' - Look at the next character from a file.
  94 //
  95
  96 int                                     // O - Next character in file
  97 ppdcFile::peek()
  98 {
  99   // Return immediaely if there is no open file...
 100   if (!fp)
 101     return (EOF);
 102
 103   // Otherwise return the next character without advancing...
 104   return (cupsFilePeekChar(fp));
 105 }
 106
 107
 108 //
 109 // End of "$Id: ppdc-file.cxx 3755 2012-03-30 05:59:14Z msweet $".
 110 //