1/* params.c - Run-time parameters. 2 Copyright (C) 2001, 2003, 2004, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA 2002110-1301, 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 34param_info *compiler_params; 35 36/* The number of entries in the table. */ 37 38static size_t num_compiler_params; 39 40/* Add the N PARAMS to the current list of compiler parameters. */ 41 42void 43add_params (const param_info params[], size_t n) 44{ 45 /* Allocate enough space for the new parameters. */ 46 compiler_params = xrealloc (compiler_params, 47 (num_compiler_params + n) * sizeof (param_info)); 48 /* Copy them into the table. */ 49 memcpy (compiler_params + num_compiler_params, 50 params, 51 n * sizeof (param_info)); 52 /* Keep track of how many parameters we have. */ 53 num_compiler_params += n; 54} 55 56/* Set the VALUE associated with the parameter given by NAME. */ 57 58void 59set_param_value (const char *name, int value) 60{ 61 size_t i; 62 63 /* Make sure nobody tries to set a parameter to an invalid value. */ 64 gcc_assert (value != INVALID_PARAM_VAL); 65 66 /* Scan the parameter table to find a matching entry. */ 67 for (i = 0; i < num_compiler_params; ++i) 68 if (strcmp (compiler_params[i].option, name) == 0) 69 { 70 if (value < compiler_params[i].min_value) 71 error ("minimum value of parameter %qs is %u", 72 compiler_params[i].option, 73 compiler_params[i].min_value); 74 else if (compiler_params[i].max_value > compiler_params[i].min_value 75 && value > compiler_params[i].max_value) 76 error ("maximum value of parameter %qs is %u", 77 compiler_params[i].option, 78 compiler_params[i].max_value); 79 else 80 compiler_params[i].value = value; 81 return; 82 } 83 84 /* If we didn't find this parameter, issue an error message. */ 85 error ("invalid parameter %qs", name); 86} 87