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1
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2 /*
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3
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4 Test to see if a particular fix should be applied to a header file.
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5
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6 Copyright (C) 1997, 1998, 1999, 2000, 2009 Free Software Foundation, Inc.
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7
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8 = = = = = = = = = = = = = = = = = = = = = = = = =
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9
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10 NOTE TO DEVELOPERS
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11
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12 The routines you write here must work closely with fixincl.c.
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13
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14 Here are the rules:
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15
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16 1. Every test procedure name must be suffixed with "_test".
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17 These routines will be referenced from inclhack.def, sans the suffix.
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18
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19 2. Use the "TEST_FOR_FIX_PROC_HEAD()" macro _with_ the "_test" suffix
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20 (I cannot use the ## magic from ANSI C) for defining your entry point.
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21
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22 3. Put your test name into the FIX_TEST_TABLE
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23
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24 4. Do not write anything to stdout. It may be closed.
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25
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26 5. Write to stderr only in the event of a reportable error
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27 In such an event, call "exit(1)".
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28
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29 = = = = = = = = = = = = = = = = = = = = = = = = =
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30
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31 This file is part of GCC.
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32
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33 GCC is free software; you can redistribute it and/or modify
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34 it under the terms of the GNU General Public License as published by
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35 the Free Software Foundation; either version 3, or (at your option)
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36 any later version.
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37
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38 GCC is distributed in the hope that it will be useful,
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39 but WITHOUT ANY WARRANTY; without even the implied warranty of
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40 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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41 GNU General Public License for more details.
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42
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43 You should have received a copy of the GNU General Public License
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44 along with GCC; see the file COPYING3. If not see
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45 <http://www.gnu.org/licenses/>. */
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46
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47 #include "fixlib.h"
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48
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49 #define _ENV_(v,m,n,t) extern tCC* v;
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50 ENV_TABLE
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51 #undef _ENV_
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52
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53 typedef apply_fix_p_t t_test_proc ( tCC* file, tCC* text );
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54
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55 typedef struct {
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56 tCC* test_name;
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57 t_test_proc* test_proc;
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58 } test_entry_t;
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59
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60 #define FIX_TEST_TABLE \
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61 _FT_( "machine_name", machine_name_test ) \
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62 _FT_( "stdc_0_in_system_headers", stdc_0_in_system_headers_test )
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63
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64 #define TEST_FOR_FIX_PROC_HEAD( test ) \
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65 static apply_fix_p_t test ( tCC* fname ATTRIBUTE_UNUSED, \
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66 tCC* text ATTRIBUTE_UNUSED )
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67
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68 TEST_FOR_FIX_PROC_HEAD( machine_name_test )
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69 {
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70 regex_t *label_re, *name_re;
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71 regmatch_t match[2];
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72 tCC *base, *limit;
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73 IGNORE_ARG(fname);
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74
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75 if (!mn_get_regexps (&label_re, &name_re, "machine_name_test"))
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76 return SKIP_FIX;
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77
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78 for (base = text;
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79 xregexec (label_re, base, 2, match, 0) == 0;
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80 base = limit)
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81 {
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82 base += match[0].rm_eo;
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83 /* We're looking at an #if or #ifdef. Scan forward for the
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84 next non-escaped newline. */
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85 limit = base;
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86 do
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87 {
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88 limit++;
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89 limit = strchr (limit, '\n');
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90 if (!limit)
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91 return SKIP_FIX;
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92 }
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93 while (limit[-1] == '\\');
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94
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95 /* If the 'name_pat' matches in between base and limit, we have
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96 a bogon. It is not worth the hassle of excluding comments,
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97 because comments on #if/#ifdef/#ifndef lines are rare,
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98 and strings on such lines are illegal.
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99
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100 REG_NOTBOL means 'base' is not at the beginning of a line, which
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101 shouldn't matter since the name_re has no ^ anchor, but let's
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102 be accurate anyway. */
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103
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104 if (xregexec (name_re, base, 1, match, REG_NOTBOL))
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105 return SKIP_FIX; /* No match in file - no fix needed */
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106
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107 /* Match; is it on the line? */
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108 if (match[0].rm_eo <= limit - base)
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109 return APPLY_FIX; /* Yup */
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110
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111 /* Otherwise, keep looking... */
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112 }
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113 return SKIP_FIX;
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114 }
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115
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116
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117 TEST_FOR_FIX_PROC_HEAD( stdc_0_in_system_headers_test )
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118 {
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119 #ifdef STDC_0_IN_SYSTEM_HEADERS
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120 return (pz_machine == NULL) ? APPLY_FIX : SKIP_FIX;
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121 #else
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122 return APPLY_FIX;
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123 #endif
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124 }
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125
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126
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127 /* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
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128
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129 test for fix selector
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130
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131 THIS IS THE ONLY EXPORTED ROUTINE
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132
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133 */
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134 apply_fix_p_t
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135 run_test( tCC* tname, tCC* fname, tCC* text )
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136 {
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137 #define _FT_(n,p) { n, p },
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138 static test_entry_t test_table[] = { FIX_TEST_TABLE { NULL, NULL }};
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139 #undef _FT_
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140 #define TEST_TABLE_CT (ARRAY_SIZE (test_table)-1)
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141
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142 int ct = TEST_TABLE_CT;
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143 test_entry_t* pte = test_table;
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144
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145 do
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146 {
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147 if (strcmp( pte->test_name, tname ) == 0)
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148 return (*pte->test_proc)( fname, text );
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149 pte++;
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150 } while (--ct > 0);
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151 fprintf( stderr, "fixincludes error: the `%s' fix test is unknown\n",
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152 tname );
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153 exit( 3 );
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154 }
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