/* params.c - Run-time parameters.
   Copyright (C) 2001 Free Software Foundation, Inc.
   Written by Mark Mitchell <mark@codesourcery.com>.

This file is part of GNU CC.

GNU CC 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.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  

*/

#include "config.h"
#include "system.h"
#include "params.h"
#include "toplev.h"

/* An array containing the compiler parameters and their current
   values.  */

param_info *compiler_params;

/* The number of entries in the table.  */

static size_t num_compiler_params;

/* Add the N PARAMS to the current list of compiler parameters.  */

void 
add_params (params, n)
     const param_info params[];
     size_t n;
{
  /* Allocate enough space for the new parameters.  */
  compiler_params = 
    ((param_info *) 
     xrealloc (compiler_params,
	       (num_compiler_params + n) * sizeof (param_info)));
  /* Copy them into the table.  */
  memcpy (compiler_params + num_compiler_params,
	  params,
	  n * sizeof (param_info));
  /* Keep track of how many parameters we have.  */
  num_compiler_params += n;
}

/* Set the VALUE associated with the parameter given by NAME.  */

void
set_param_value (name, value)
     const char *name;
     int value;
{
  size_t i;

  /* Make sure nobody tries to set a parameter to an invalid value.  */
  if (value == INVALID_PARAM_VAL)
    abort ();

  /* Scan the parameter table to find a matching entry.  */
  for (i = 0; i < num_compiler_params; ++i)
    if (strcmp (compiler_params[i].option, name) == 0)
      {
	compiler_params[i].value = value;
	return;
      }

  /* If we didn't find this parameter, issue an error message.  */
  error ("invalid parameter `%s'", name);
}