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
11NOTE TO DEVELOPERS
12
13The routines you write here must work closely with fixincl.c.
14
15Here are the rules:
16
171.  Every test procedure name must be suffixed with "_test".
18    These routines will be referenced from inclhack.def, sans the suffix.
19
202.  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
233.  Put your test name into the FIX_TEST_TABLE
24
254.  Do not write anything to stdout.  It may be closed.
26
275.  Write to stderr only in the event of a reportable error
28    In such an event, call "exit(1)".
29
30= = = = = = = = = = = = = = = = = = = = = = = = =
31
32This file is part of GCC.
33
34GCC is free software; you can redistribute it and/or modify
35it under the terms of the GNU General Public License as published by
36the Free Software Foundation; either version 3, or (at your option)
37any later version.
38
39GCC is distributed in the hope that it will be useful,
40but WITHOUT ANY WARRANTY; without even the implied warranty of
41MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
42GNU General Public License for more details.
43
44You should have received a copy of the GNU General Public License
45along 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;
51ENV_TABLE
52#undef _ENV_
53
54typedef apply_fix_p_t t_test_proc ( tCC* file, tCC* text );
55
56typedef 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 ) \
66static apply_fix_p_t test ( tCC* fname ATTRIBUTE_UNUSED, \
67                            tCC* text  ATTRIBUTE_UNUSED )
68
69TEST_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
118TEST_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*/
135apply_fix_p_t
136run_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}
156