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1 /* params.c - Run-time parameters.
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2 Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008
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3 Free Software Foundation, Inc.
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4 Written by Mark Mitchell <mark@codesourcery.com>.
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it under
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9 the terms of the GNU General Public License as published by the Free
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10 Software Foundation; either version 3, or (at your option) any later
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11 version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 #include "config.h"
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23 #include "system.h"
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24 #include "coretypes.h"
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25 #include "tm.h"
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26 #include "params.h"
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27 #include "toplev.h"
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28
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29 /* An array containing the compiler parameters and their current
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30 values. */
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31
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32 param_info *compiler_params;
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33
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34 /* The number of entries in the table. */
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35
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36 static size_t num_compiler_params;
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37
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38 /* Add the N PARAMS to the current list of compiler parameters. */
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39
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40 void
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41 add_params (const param_info params[], size_t n)
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42 {
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43 /* Allocate enough space for the new parameters. */
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44 compiler_params = XRESIZEVEC (param_info, compiler_params,
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45 num_compiler_params + n);
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46 /* Copy them into the table. */
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47 memcpy (compiler_params + num_compiler_params,
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48 params,
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49 n * sizeof (param_info));
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50 /* Keep track of how many parameters we have. */
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51 num_compiler_params += n;
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52 }
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53
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54 /* Set the VALUE associated with the parameter given by NAME. */
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55
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56 void
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57 set_param_value (const char *name, int value)
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58 {
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59 size_t i;
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60
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61 /* Make sure nobody tries to set a parameter to an invalid value. */
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62 gcc_assert (value != INVALID_PARAM_VAL);
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63
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64 /* Scan the parameter table to find a matching entry. */
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65 for (i = 0; i < num_compiler_params; ++i)
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66 if (strcmp (compiler_params[i].option, name) == 0)
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67 {
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68 if (value < compiler_params[i].min_value)
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69 error ("minimum value of parameter %qs is %u",
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70 compiler_params[i].option,
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71 compiler_params[i].min_value);
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72 else if (compiler_params[i].max_value > compiler_params[i].min_value
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73 && value > compiler_params[i].max_value)
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74 error ("maximum value of parameter %qs is %u",
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75 compiler_params[i].option,
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76 compiler_params[i].max_value);
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77 else
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78 {
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79 compiler_params[i].value = value;
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80 compiler_params[i].set = true;
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81 }
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82 return;
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83 }
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84
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85 /* If we didn't find this parameter, issue an error message. */
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86 error ("invalid parameter %qs", name);
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87 }
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