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
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 GNU CC.
32
33GNU CC 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 2, or (at your option)
36any later version.
37
38GNU CC 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 GNU CC; see the file COPYING.  If not, write to
45the Free Software Foundation, 59 Temple Place - Suite 330,
46Boston, MA 02111-1307, USA.  */
47
48#include "fixlib.h"
49
50#define _ENV_(v,m,n,t)   extern tCC* v;
51ENV_TABLE
52#undef _ENV_
53
54typedef apply_fix_p_t t_test_proc PARAMS(( 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 PARAMS(( tCC* file, tCC* text ));  \
67static apply_fix_p_t test ( fname, text )       \
68    tCC* fname;                                 \
69    tCC* text;
70
71
72TEST_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
124TEST_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*/
141apply_fix_p_t
142run_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}
165