fixincludes/fixtests.c

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