gcc/fixinc/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 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 2, 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 COPYING.  If not, write to
  45 the Free Software Foundation, 59 Temple Place - Suite 330,
  46 Boston, MA 02111-1307, USA.  */
  47
  48 #include "fixlib.h"
  49
  50 #define _ENV_(v,m,n,t)   extern tCC* v;
  51 ENV_TABLE
  52 #undef _ENV_
  53
  54 typedef apply_fix_p_t t_test_proc ( tCC* file, tCC* text );
  55
  56 typedef struct {
  57     tCC*         test_name;
  58     t_test_proc* test_proc;
  59 } test_entry_t;
  60
  61 #define FIX_TEST_TABLE                                                  \
  62   _FT_( "machine_name",     machine_name_test )                         \
  63   _FT_( "stdc_0_in_system_headers",    stdc_0_in_system_headers_test )
  64
  65 #define TEST_FOR_FIX_PROC_HEAD( test ) \
  66 static apply_fix_p_t test ( tCC* fname ATTRIBUTE_UNUSED, \
  67                             tCC* text  ATTRIBUTE_UNUSED )
  68
  69 TEST_FOR_FIX_PROC_HEAD( machine_name_test )
  70 {
  71 #ifndef MN_NAME_PAT
  72   return SKIP_FIX;
  73 #else
  74   regex_t *label_re, *name_re;
  75   regmatch_t match[2];
  76   tCC *base, *limit;
  77   IGNORE_ARG(fname);
  78
  79   mn_get_regexps(&label_re, &name_re, "machine_name_test");
  80
  81   for (base = text;
  82        xregexec (label_re, base, 2, match, 0) == 0;
  83        base = limit)
  84     {
  85       base += match[0].rm_eo;
  86       /* We're looking at an #if or #ifdef.  Scan forward for the
  87          next non-escaped newline.  */
  88       limit = base;
  89       do
  90         {
  91           limit++;
  92           limit = strchr (limit, '\n');
  93           if (!limit)
  94             return SKIP_FIX;
  95         }
  96       while (limit[-1] == '\\');
  97
  98       /* If the 'name_pat' matches in between base and limit, we have
  99          a bogon.  It is not worth the hassle of excluding comments,
 100          because comments on #if/#ifdef/#ifndef lines are rare,
 101          and strings on such lines are illegal.
 102
 103          REG_NOTBOL means 'base' is not at the beginning of a line, which
 104          shouldn't matter since the name_re has no ^ anchor, but let's
 105          be accurate anyway.  */
 106
 107       if (xregexec (name_re, base, 1, match, REG_NOTBOL))
 108         return SKIP_FIX;  /* No match in file - no fix needed */
 109
 110       /* Match; is it on the line?  */
 111       if (match[0].rm_eo <= limit - base)
 112         return APPLY_FIX;  /* Yup */
 113
 114       /* Otherwise, keep looking... */
 115     }
 116   return SKIP_FIX;
 117 #endif
 118 }
 119
 120
 121 TEST_FOR_FIX_PROC_HEAD( stdc_0_in_system_headers_test )
 122 {
 123 #ifdef STDC_0_IN_SYSTEM_HEADERS
 124   return (pz_machine == NULL) ? APPLY_FIX : SKIP_FIX;
 125 #else
 126   return APPLY_FIX;
 127 #endif
 128 }
 129
 130
 131 /* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
 132
 133      test for fix selector
 134
 135      THIS IS THE ONLY EXPORTED ROUTINE
 136
 137 */
 138 apply_fix_p_t
 139 run_test( tCC* tname, tCC* fname, tCC* text )
 140 {
 141 #define _FT_(n,p) { n, p },
 142   static test_entry_t test_table[] = { FIX_TEST_TABLE { NULL, NULL }};
 143 #undef _FT_
 144 #define TEST_TABLE_CT (ARRAY_SIZE (test_table)-1)
 145
 146   int ct = TEST_TABLE_CT;
 147   test_entry_t* pte = test_table;
 148
 149   do
 150     {
 151       if (strcmp( pte->test_name, tname ) == 0)
 152         return (*pte->test_proc)( fname, text );
 153       pte++;
 154     } while (--ct > 0);
 155   fprintf( stderr, "fixincludes error:  the `%s' fix test is unknown\n",
 156            tname );
 157   exit( 3 );
 158 }