[gcc.git] / gcc / cppmain.c

/* CPP main program, using CPP Library.
   Copyright (C) 1995, 1997 Free Software Foundation, Inc.
   Written by Per Bothner, 1994-95.

This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 In other words, you are welcome to use, share and improve this program.
 You are forbidden to forbid anyone else to use, share and improve
 what you give them.   Help stamp out software-hoarding!  */

#ifndef EMACS
#include "config.h"
#include "system.h"
#include "gansidecl.h"
#else
#include <stdio.h>

extern char *getenv ();
#endif /* not EMACS */

#include "cpplib.h"

char *progname;

cpp_reader parse_in;
cpp_options options;

#ifdef abort
/* More 'friendly' abort that prints the line and file.
   config.h can #define abort fancy_abort if you like that sort of thing.  */

void
fancy_abort ()
{
  fatal ("Internal gcc abort.");
}
#endif

\f
int
main (argc, argv)
     int argc;
     char **argv;
{
  char *p;
  int argi = 1;  /* Next argument to handle.  */
  struct cpp_options *opts = &options;

  p = argv[0] + strlen (argv[0]);
  while (p != argv[0] && p[-1] != '/') --p;
  progname = p;

  cpp_reader_init (&parse_in);
  parse_in.data = opts;

  cpp_options_init (opts);
  
  argi += cpp_handle_options (&parse_in, argc - argi , argv + argi);
  if (argi < argc && ! CPP_FATAL_ERRORS (&parse_in))
    cpp_fatal (&parse_in, "Invalid option `%s'", argv[argi]);
  if (CPP_FATAL_ERRORS (&parse_in))
    exit (FATAL_EXIT_CODE);
      
  parse_in.show_column = 1;

  if (! cpp_start_read (&parse_in, opts->in_fname))
    exit (FATAL_EXIT_CODE);

  /* Now that we know the input file is valid, open the output.  */

  if (!opts->out_fname || !strcmp (opts->out_fname, ""))
    opts->out_fname = "stdout";
  else if (! freopen (opts->out_fname, "w", stdout))
    cpp_pfatal_with_name (&parse_in, opts->out_fname);

  for (;;)
    {
      enum cpp_token kind;
      if (! opts->no_output)
	{
	  fwrite (parse_in.token_buffer, 1, CPP_WRITTEN (&parse_in), stdout);
	}
      CPP_SET_WRITTEN (&parse_in, 0);
      kind = cpp_get_token (&parse_in);
      if (kind == CPP_EOF)
	break;
    }

  cpp_finish (&parse_in);

  if (parse_in.errors)
    exit (FATAL_EXIT_CODE);
  exit (SUCCESS_EXIT_CODE);
}
Commit	Line	Data
	1	/* CPP main program, using CPP Library.
	2	Copyright (C) 1995, 1997 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	#ifndef EMACS
	24	#include "config.h"
	25	#include "system.h"
	26	#include "gansidecl.h"
	27	#else
	28	#include <stdio.h>
	29
	30	extern char *getenv ();
	31	#endif /* not EMACS */
	32
	33	#include "cpplib.h"
	34
	35	char *progname;
	36
	37	cpp_reader parse_in;
	38	cpp_options options;
	39
	40	#ifdef abort
	41	/* More 'friendly' abort that prints the line and file.
	42	config.h can #define abort fancy_abort if you like that sort of thing. */
	43
	44	void
	45	fancy_abort ()
	46	{
	47	fatal ("Internal gcc abort.");
	48	}
	49	#endif
	50
	51	\f
	52	int
	53	main (argc, argv)
	54	int argc;
	55	char **argv;
	56	{
	57	char *p;
	58	int argi = 1; /* Next argument to handle. */
	59	struct cpp_options *opts = &options;
	60
	61	p = argv[0] + strlen (argv[0]);
	62	while (p != argv[0] && p[-1] != '/') --p;
	63	progname = p;
	64
	65	cpp_reader_init (&parse_in);
	66	parse_in.data = opts;
	67
	68	cpp_options_init (opts);
	69
	70	argi += cpp_handle_options (&parse_in, argc - argi , argv + argi);
	71	if (argi < argc && ! CPP_FATAL_ERRORS (&parse_in))
	72	cpp_fatal (&parse_in, "Invalid option `%s'", argv[argi]);
	73	if (CPP_FATAL_ERRORS (&parse_in))
	74	exit (FATAL_EXIT_CODE);
	75
	76	parse_in.show_column = 1;
	77
	78	if (! cpp_start_read (&parse_in, opts->in_fname))
	79	exit (FATAL_EXIT_CODE);
	80
	81	/* Now that we know the input file is valid, open the output. */
	82
	83	if (!opts->out_fname \|\| !strcmp (opts->out_fname, ""))
	84	opts->out_fname = "stdout";
	85	else if (! freopen (opts->out_fname, "w", stdout))
	86	cpp_pfatal_with_name (&parse_in, opts->out_fname);
	87
	88	for (;;)
	89	{
	90	enum cpp_token kind;
	91	if (! opts->no_output)
	92	{
	93	fwrite (parse_in.token_buffer, 1, CPP_WRITTEN (&parse_in), stdout);
	94	}
	95	CPP_SET_WRITTEN (&parse_in, 0);
	96	kind = cpp_get_token (&parse_in);
	97	if (kind == CPP_EOF)
	98	break;
	99	}
	100
	101	cpp_finish (&parse_in);
	102
	103	if (parse_in.errors)
	104	exit (FATAL_EXIT_CODE);
	105	exit (SUCCESS_EXIT_CODE);
	106	}