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[thirdparty/gcc.git] / gcc / genconstants.c

/* Generate from machine description:
   a series of #define statements, one for each constant named in
   a (define_constants ...) pattern.

   Copyright (C) 1987, 1991, 1995, 1998, 1999, 2000, 2001, 2003, 2004,
   2007  Free Software Foundation, Inc.

This file is part of GCC.

GCC 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 3, or (at your option)
any later version.

GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

/* This program does not use gensupport.c because it does not need to
   look at insn patterns, only (define_constants), and we want to
   minimize dependencies.  */

#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "errors.h"
#include "gensupport.h"

/* Called via traverse_md_constants; emit a #define for
   the current constant definition.  */

static int
print_md_constant (void **slot, void *info)
{
  struct md_constant *def = (struct md_constant *) *slot;
  FILE *file = (FILE *) info;

  fprintf (file, "#define %s %s\n", def->name, def->value);
  return 1;
}

int
main (int argc, char **argv)
{
  progname = "genconstants";

  if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
    return (FATAL_EXIT_CODE);

  /* Initializing the MD reader has the side effect of loading up
     the constants table that we wish to scan.  */

  puts ("/* Generated automatically by the program `genconstants'");
  puts ("   from the machine description file `md'.  */\n");
  puts ("#ifndef GCC_INSN_CONSTANTS_H");
  puts ("#define GCC_INSN_CONSTANTS_H\n");

  traverse_md_constants (print_md_constant, stdout);

  puts ("\n#endif /* GCC_INSN_CONSTANTS_H */");

  if (ferror (stdout) || fflush (stdout) || fclose (stdout))
    return FATAL_EXIT_CODE;

  return SUCCESS_EXIT_CODE;
}