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
10NOTE TO DEVELOPERS
11
12The routines you write here must work closely with fixincl.c.
13
14Here are the rules:
15
161.  Every test procedure name must be suffixed with "_test".
17    These routines will be referenced from inclhack.def, sans the suffix.
18
192.  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
223.  Put your test name into the FIX_TEST_TABLE
23
244.  Do not write anything to stdout.  It may be closed.
25
265.  Write to stderr only in the event of a reportable error
27    In such an event, call "exit(1)".
28
29= = = = = = = = = = = = = = = = = = = = = = = = =
30
31This file is part of GCC.
32
33GCC is free software; you can redistribute it and/or modify
34it under the terms of the GNU General Public License as published by
35the Free Software Foundation; either version 3, or (at your option)
36any later version.
37
38GCC is distributed in the hope that it will be useful,
39but WITHOUT ANY WARRANTY; without even the implied warranty of
40MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
41GNU General Public License for more details.
42
43You should have received a copy of the GNU General Public License
44along 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 tCC* v;
50ENV_TABLE
51#undef _ENV_
52
53typedef apply_fix_p_t t_test_proc ( tCC* file, tCC* text );
54
55typedef 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 ) \
65static apply_fix_p_t test ( tCC* fname ATTRIBUTE_UNUSED, \
66                            tCC* text  ATTRIBUTE_UNUSED )
67
68TEST_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
117TEST_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*/
134apply_fix_p_t
135run_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}
155