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, 2012
       7     Free Software Foundation, Inc.
       8  
       9  = = = = = = = = = = = = = = = = = = = = = = = = =
      10  
      11  NOTE TO DEVELOPERS
      12  
      13  The routines you write here must work closely with fixincl.c.
      14  
      15  Here are the rules:
      16  
      17  1.  Every test procedure name must be suffixed with "_test".
      18      These routines will be referenced from inclhack.def, sans the suffix.
      19  
      20  2.  Use the "TEST_FOR_FIX_PROC_HEAD()" macro _with_ the "_test" suffix
      21      (I cannot use the ## magic from ANSI C) for defining your entry point.
      22  
      23  3.  Put your test name into the FIX_TEST_TABLE
      24  
      25  4.  Do not write anything to stdout.  It may be closed.
      26  
      27  5.  Write to stderr only in the event of a reportable error
      28      In such an event, call "exit(1)".
      29  
      30  = = = = = = = = = = = = = = = = = = = = = = = = =
      31  
      32  This file is part of GCC.
      33  
      34  GCC is free software; you can redistribute it and/or modify
      35  it under the terms of the GNU General Public License as published by
      36  the Free Software Foundation; either version 3, or (at your option)
      37  any later version.
      38  
      39  GCC is distributed in the hope that it will be useful,
      40  but WITHOUT ANY WARRANTY; without even the implied warranty of
      41  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      42  GNU General Public License for more details.
      43  
      44  You should have received a copy of the GNU General Public License
      45  along with GCC; see the file COPYING3.  If not see
      46  <http://www.gnu.org/licenses/>.  */
      47  
      48  #include "fixlib.h"
      49  
      50  #define _ENV_(v,m,n,t)   extern char const * 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    regex_t *label_re, *name_re;
      72    regmatch_t match[2];
      73    tCC *base, *limit;
      74    IGNORE_ARG(fname);
      75  
      76    if (!mn_get_regexps (&label_re, &name_re, "machine_name_test"))
      77      return SKIP_FIX;
      78  
      79    for (base = text;
      80         xregexec (label_re, base, 2, match, 0) == 0;
      81         base = limit)
      82      {
      83        base += match[0].rm_eo;
      84        /* We're looking at an #if or #ifdef.  Scan forward for the
      85  	 next non-escaped newline.  */
      86        limit = base;
      87        do
      88  	{
      89  	  limit++;
      90  	  limit = strchr (limit, '\n');
      91  	  if (!limit)
      92  	    return SKIP_FIX;
      93  	}
      94        while (limit[-1] == '\\');
      95  
      96        /* If the 'name_pat' matches in between base and limit, we have
      97  	 a bogon.  It is not worth the hassle of excluding comments,
      98  	 because comments on #if/#ifdef/#ifndef lines are rare,
      99  	 and strings on such lines are illegal.
     100  
     101  	 REG_NOTBOL means 'base' is not at the beginning of a line, which
     102  	 shouldn't matter since the name_re has no ^ anchor, but let's
     103  	 be accurate anyway.  */
     104  
     105        if (xregexec (name_re, base, 1, match, REG_NOTBOL))
     106  	return SKIP_FIX;  /* No match in file - no fix needed */
     107  
     108        /* Match; is it on the line?  */
     109        if (match[0].rm_eo <= limit - base)
     110  	return APPLY_FIX;  /* Yup */
     111  
     112        /* Otherwise, keep looking... */
     113      }
     114    return SKIP_FIX;
     115  }
     116  
     117  
     118  TEST_FOR_FIX_PROC_HEAD( stdc_0_in_system_headers_test )
     119  {
     120  #ifdef STDC_0_IN_SYSTEM_HEADERS
     121    return (pz_machine == NULL) ? APPLY_FIX : SKIP_FIX;
     122  #else
     123    return APPLY_FIX;
     124  #endif
     125  }
     126  
     127  
     128  /* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
     129  
     130       test for fix selector
     131  
     132       THIS IS THE ONLY EXPORTED ROUTINE
     133  
     134  */
     135  apply_fix_p_t
     136  run_test( tCC* tname, tCC* fname, tCC* text )
     137  {
     138  #define _FT_(n,p) { n, p },
     139    static test_entry_t test_table[] = { FIX_TEST_TABLE { NULL, NULL }};
     140  #undef _FT_
     141  #define TEST_TABLE_CT (ARRAY_SIZE (test_table)-1)
     142  
     143    int ct = TEST_TABLE_CT;
     144    test_entry_t* pte = test_table;
     145  
     146    do
     147      {
     148        if (strcmp( pte->test_name, tname ) == 0)
     149          return (*pte->test_proc)( fname, text );
     150        pte++;
     151      } while (--ct > 0);
     152    fprintf( stderr, "fixincludes error:  the `%s' fix test is unknown\n",
     153             tname );
     154    exit( 3 );
     155  }