gcc/params.c

   1 /* params.c - Run-time parameters.
   2    Copyright (C) 2001, 2003 Free Software Foundation, Inc.
   3    Written by Mark Mitchell <mark@codesourcery.com>.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.
  21
  22 */
  23
  24 #include "config.h"
  25 #include "system.h"
  26 #include "coretypes.h"
  27 #include "tm.h"
  28 #include "params.h"
  29 #include "toplev.h"
  30
  31 /* An array containing the compiler parameters and their current
  32    values.  */
  33
  34 param_info *compiler_params;
  35
  36 /* The number of entries in the table.  */
  37
  38 static size_t num_compiler_params;
  39
  40 /* Add the N PARAMS to the current list of compiler parameters.  */
  41
  42 void
  43 add_params (const param_info params[], 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
  60 void
  61 set_param_value (const char *name, int value)
  62 {
  63   size_t i;
  64
  65   /* Make sure nobody tries to set a parameter to an invalid value.  */
  66   if (value == INVALID_PARAM_VAL)
  67     abort ();
  68
  69   /* Scan the parameter table to find a matching entry.  */
  70   for (i = 0; i < num_compiler_params; ++i)
  71     if (strcmp (compiler_params[i].option, name) == 0)
  72       {
  73         compiler_params[i].value = value;
  74         return;
  75       }
  76
  77   /* If we didn't find this parameter, issue an error message.  */
  78   error ("invalid parameter `%s'", name);
  79 }