params.c revision 90075 
1/* params.c - Run-time parameters.
2   Copyright (C) 2001 Free Software Foundation, Inc.
3   Written by Mark Mitchell <mark@codesourcery.com>.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to the Free
19Software Foundation, 59 Temple Place - Suite 330, Boston, MA
2002111-1307, USA.
21
22*/
23
24#include "config.h"
25#include "system.h"
26#include "params.h"
27#include "toplev.h"
28
29/* An array containing the compiler parameters and their current
30   values.  */
31
32param_info *compiler_params;
33
34/* The number of entries in the table.  */
35
36static size_t num_compiler_params;
37
38/* Add the N PARAMS to the current list of compiler parameters.  */
39
40void
41add_params (params, n)
42     const param_info params[];
43     size_t n;
44{
45  /* Allocate enough space for the new parameters.  */
46  compiler_params =
47    ((param_info *)
48     xrealloc (compiler_params,
49	       (num_compiler_params + n) * sizeof (param_info)));
50  /* Copy them into the table.  */
51  memcpy (compiler_params + num_compiler_params,
52	  params,
53	  n * sizeof (param_info));
54  /* Keep track of how many parameters we have.  */
55  num_compiler_params += n;
56}
57
58/* Set the VALUE associated with the parameter given by NAME.  */
59
60void
61set_param_value (name, value)
62     const char *name;
63     int value;
64{
65  size_t i;
66
67  /* Make sure nobody tries to set a parameter to an invalid value.  */
68  if (value == INVALID_PARAM_VAL)
69    abort ();
70
71  /* Scan the parameter table to find a matching entry.  */
72  for (i = 0; i < num_compiler_params; ++i)
73    if (strcmp (compiler_params[i].option, name) == 0)
74      {
75	compiler_params[i].value = value;
76	return;
77      }
78
79  /* If we didn't find this parameter, issue an error message.  */
80  error ("invalid parameter `%s'", name);
81}
82
83
84
85