gcc/cppmain.c

   1 /* CPP main program, using CPP Library.
   2    Copyright (C) 1995, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
   3    Written by Per Bothner, 1994-95.
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19  In other words, you are welcome to use, share and improve this program.
  20  You are forbidden to forbid anyone else to use, share and improve
  21  what you give them.   Help stamp out software-hoarding!  */
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "cpplib.h"
  26 #include "intl.h"
  27
  28 const char *progname;
  29
  30 cpp_reader parse_in;
  31
  32 \f
  33 extern int main                         PARAMS ((int, char **));
  34 int
  35 main (argc, argv)
  36      int argc;
  37      char **argv;
  38 {
  39   char *p;
  40   cpp_reader *pfile = &parse_in;
  41   int argi = 1;  /* Next argument to handle.  */
  42   enum cpp_ttype kind;
  43   FILE *out;
  44   const char *out_fname;
  45
  46   p = argv[0] + strlen (argv[0]);
  47   while (p != argv[0] && p[-1] != '/') --p;
  48   progname = p;
  49
  50   xmalloc_set_program_name (progname);
  51
  52 #ifdef HAVE_LC_MESSAGES
  53   setlocale (LC_MESSAGES, "");
  54 #endif
  55   (void) bindtextdomain (PACKAGE, localedir);
  56   (void) textdomain (PACKAGE);
  57
  58   cpp_reader_init (pfile);
  59
  60   argi += cpp_handle_options (pfile, argc - argi , argv + argi);
  61   if (argi < argc && ! CPP_FATAL_ERRORS (pfile))
  62     cpp_fatal (pfile, "Invalid option %s", argv[argi]);
  63   if (CPP_FATAL_ERRORS (pfile))
  64     return (FATAL_EXIT_CODE);
  65
  66   if (! cpp_start_read (pfile, CPP_OPTION (pfile, in_fname)))
  67     return (FATAL_EXIT_CODE);
  68
  69   /* Now that we know the input file is valid, open the output.  */
  70   out_fname = CPP_OPTION (pfile, out_fname);
  71   if (*out_fname == '\0')
  72     {
  73       out_fname = "stdout";
  74       out = stdout;
  75     }
  76   else
  77     {
  78       out = fopen (out_fname, "w");
  79       if (!out)
  80         {
  81           cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname));
  82           return (FATAL_EXIT_CODE);
  83         }
  84     }
  85
  86   if (! CPP_OPTION (pfile, no_output))
  87     {
  88       do
  89         {
  90           kind = cpp_get_token (pfile);
  91           if (CPP_WRITTEN (pfile) >= BUFSIZ || kind == CPP_EOF)
  92             {
  93               size_t rem, count = CPP_WRITTEN (pfile);
  94
  95               rem = fwrite (parse_in.token_buffer, 1, count, out);
  96               if (rem < count)
  97                 /* Write error. */
  98                 cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname));
  99
 100               CPP_SET_WRITTEN (pfile, 0);
 101             }
 102         }
 103       while (kind != CPP_EOF);
 104     }
 105   else
 106     {
 107       do
 108         {
 109           cpp_scan_buffer (pfile);
 110           kind = cpp_get_token (pfile);
 111         }
 112       while (kind != CPP_EOF);
 113       CPP_SET_WRITTEN (pfile, 0);
 114     }
 115
 116   cpp_finish (pfile);
 117   if (fwrite (parse_in.token_buffer, 1, CPP_WRITTEN (pfile), out)
 118       < CPP_WRITTEN (pfile))
 119     cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname));
 120
 121   if (ferror (out) || fclose (out))
 122     cpp_notice_from_errno (pfile, CPP_OPTION (pfile, out_fname));
 123
 124   cpp_cleanup (pfile);
 125
 126   if (parse_in.errors)
 127     return (FATAL_EXIT_CODE);
 128   return (SUCCESS_EXIT_CODE);
 129 }