ppdc/ppdc-file.cxx

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