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 GNU CC.
  32
  33 GNU CC 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 GNU CC 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 GNU CC; 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 PARAMS(( 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 PARAMS(( tCC* file, tCC* text ));  \
  67 static apply_fix_p_t test ( fname, text )       \
  68     tCC* fname;                                 \
  69     tCC* text;
  70
  71
  72 TEST_FOR_FIX_PROC_HEAD( machine_name_test )
  73 {
  74 #ifndef MN_NAME_PAT
  75   return SKIP_FIX;
  76 #else
  77   regex_t *label_re, *name_re;
  78   regmatch_t match[2];
  79   tCC *base, *limit;
  80   IGNORE_ARG(fname);
  81
  82   mn_get_regexps(&label_re, &name_re, "machine_name_test");
  83
  84   for (base = text;
  85        regexec (label_re, base, 2, match, 0) == 0;
  86        base = limit)
  87     {
  88       base += match[0].rm_eo;
  89       /* We're looking at an #if or #ifdef.  Scan forward for the
  90          next non-escaped newline.  */
  91       limit = base;
  92       do
  93         {
  94           limit++;
  95           limit = strchr (limit, '\n');
  96           if (!limit)
  97             return SKIP_FIX;
  98         }
  99       while (limit[-1] == '\\');
 100
 101       /* If the 'name_pat' matches in between base and limit, we have
 102          a bogon.  It is not worth the hassle of excluding comments,
 103          because comments on #if/#ifdef/#ifndef lines are rare,
 104          and strings on such lines are illegal.
 105
 106          REG_NOTBOL means 'base' is not at the beginning of a line, which
 107          shouldn't matter since the name_re has no ^ anchor, but let's
 108          be accurate anyway.  */
 109
 110       if (regexec (name_re, base, 1, match, REG_NOTBOL))
 111         return SKIP_FIX;  /* No match in file - no fix needed */
 112
 113       /* Match; is it on the line?  */
 114       if (match[0].rm_eo <= limit - base)
 115         return APPLY_FIX;  /* Yup */
 116
 117       /* Otherwise, keep looking... */
 118     }
 119   return SKIP_FIX;
 120 #endif
 121 }
 122
 123
 124 TEST_FOR_FIX_PROC_HEAD( stdc_0_in_system_headers_test )
 125 {
 126 #ifdef STDC_0_IN_SYSTEM_HEADERS
 127   return (pz_machine == NULL) ? APPLY_FIX : SKIP_FIX;
 128 #else
 129   return APPLY_FIX;
 130 #endif
 131 }
 132
 133
 134 /* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
 135
 136      test for fix selector
 137
 138      THIS IS THE ONLY EXPORTED ROUTINE
 139
 140 */
 141 apply_fix_p_t
 142 run_test( tname, fname, text )
 143   tCC* tname;
 144   tCC* fname;
 145   tCC* text;
 146 {
 147 #define _FT_(n,p) { n, p },
 148   static test_entry_t test_table[] = { FIX_TEST_TABLE { NULL, NULL }};
 149 #undef _FT_
 150 #define TEST_TABLE_CT (ARRAY_SIZE (test_table)-1)
 151
 152   int ct = TEST_TABLE_CT;
 153   test_entry_t* pte = test_table;
 154
 155   do
 156     {
 157       if (strcmp( pte->test_name, tname ) == 0)
 158         return (*pte->test_proc)( fname, text );
 159       pte++;
 160     } while (--ct > 0);
 161   fprintf( stderr, "fixincludes error:  the `%s' fix test is unknown\n",
 162            tname );
 163   exit( 3 );
 164 }