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 // Licensed under Apache License v2.0.  See the file "LICENSE" for more information.
   8 //
   9
  10 //
  11 // Include necessary headers...
  12 //
  13
  14 #include "ppdc-private.h"
  15
  16
  17 //
  18 // 'ppdcFile::ppdcFile()' - Create (open) a file.
  19 //
  20
  21 ppdcFile::ppdcFile(const char  *f,              // I - File to open
  22                    cups_file_t *ffp)            // I - File pointer to use
  23 {
  24   if (ffp)
  25   {
  26     fp = ffp;
  27     cupsFileRewind(fp);
  28   }
  29   else
  30     fp = cupsFileOpen(f, "r");
  31
  32   close_on_delete = !ffp;
  33   filename        = f;
  34   line            = 1;
  35
  36   if (!fp)
  37     _cupsLangPrintf(stderr, _("ppdc: Unable to open %s: %s"), f,
  38                     strerror(errno));
  39 }
  40
  41
  42 //
  43 // 'ppdcFile::~ppdcFile()' - Delete (close) a file.
  44 //
  45
  46 ppdcFile::~ppdcFile()
  47 {
  48   if (close_on_delete && fp)
  49     cupsFileClose(fp);
  50 }
  51
  52
  53 //
  54 // 'ppdcFile::get()' - Get a character from a file.
  55 //
  56
  57 int
  58 ppdcFile::get()
  59 {
  60   int   ch;                                     // Character from file
  61
  62
  63   // Return EOF if there is no open file...
  64   if (!fp)
  65     return (EOF);
  66
  67   // Get the character...
  68   ch = cupsFileGetChar(fp);
  69
  70   // Update the line number as needed...
  71   if (ch == '\n')
  72     line ++;
  73
  74   // Return the character...
  75   return (ch);
  76 }
  77
  78
  79 //
  80 // 'ppdcFile::peek()' - Look at the next character from a file.
  81 //
  82
  83 int                                     // O - Next character in file
  84 ppdcFile::peek()
  85 {
  86   // Return immediaely if there is no open file...
  87   if (!fp)
  88     return (EOF);
  89
  90   // Otherwise return the next character without advancing...
  91   return (cupsFilePeekChar(fp));
  92 }