source: grub-pc/trunk/fuentes/m4/regex.m4 @ 22

Last change on this file since 22 was 22, checked in by mabarracus, 4 years ago

updated version and apply net.ifnames=0 into debian/rules

File size: 10.7 KB
Line 
1# serial 64
2
3# Copyright (C) 1996-2001, 2003-2013 Free Software Foundation, Inc.
4#
5# This file is free software; the Free Software Foundation
6# gives unlimited permission to copy and/or distribute it,
7# with or without modifications, as long as this notice is preserved.
8
9dnl Initially derived from code in GNU grep.
10dnl Mostly written by Jim Meyering.
11
12AC_PREREQ([2.50])
13
14AC_DEFUN([gl_REGEX],
15[
16  AC_ARG_WITH([included-regex],
17    [AS_HELP_STRING([--without-included-regex],
18                    [don't compile regex; this is the default on systems
19                     with recent-enough versions of the GNU C Library
20                     (use with caution on other systems).])])
21
22  case $with_included_regex in #(
23  yes|no) ac_use_included_regex=$with_included_regex
24        ;;
25  '')
26    # If the system regex support is good enough that it passes the
27    # following run test, then default to *not* using the included regex.c.
28    # If cross compiling, assume the test would fail and use the included
29    # regex.c.
30    AC_CHECK_DECLS_ONCE([alarm])
31    AC_CACHE_CHECK([for working re_compile_pattern],
32                   [gl_cv_func_re_compile_pattern_working],
33      [AC_RUN_IFELSE(
34        [AC_LANG_PROGRAM(
35          [[#include <regex.h>
36
37            #include <locale.h>
38            #include <limits.h>
39            #include <string.h>
40            #if HAVE_DECL_ALARM
41            # include <unistd.h>
42            # include <signal.h>
43            #endif
44          ]],
45          [[int result = 0;
46            static struct re_pattern_buffer regex;
47            unsigned char folded_chars[UCHAR_MAX + 1];
48            int i;
49            const char *s;
50            struct re_registers regs;
51
52#if HAVE_DECL_ALARM
53            /* Some builds of glibc go into an infinite loop on this test.  */
54            signal (SIGALRM, SIG_DFL);
55            alarm (2);
56#endif
57            if (setlocale (LC_ALL, "en_US.UTF-8"))
58              {
59                {
60                  /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
61                     This test needs valgrind to catch the bug on Debian
62                     GNU/Linux 3.1 x86, but it might catch the bug better
63                     on other platforms and it shouldn't hurt to try the
64                     test here.  */
65                  static char const pat[] = "insert into";
66                  static char const data[] =
67                    "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
68                  re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
69                                 | RE_ICASE);
70                  memset (&regex, 0, sizeof regex);
71                  s = re_compile_pattern (pat, sizeof pat - 1, &regex);
72                  if (s)
73                    result |= 1;
74                  else if (re_search (&regex, data, sizeof data - 1,
75                                      0, sizeof data - 1, &regs)
76                           != -1)
77                    result |= 1;
78                }
79
80                {
81                  /* This test is from glibc bug 15078.
82                     The test case is from Andreas Schwab in
83                     <http://www.sourceware.org/ml/libc-alpha/2013-01/msg00967.html>.
84                     */
85                  static char const pat[] = "[^x]x";
86                  static char const data[] =
87                    "\xe1\x80\x80\xe1\x80\xbb\xe1\x80\xbd\xe1\x80\x94\xe1\x80"
88                    "\xba\xe1\x80\xaf\xe1\x80\x95\xe1\x80\xbax";
89                  re_set_syntax (0);
90                  memset (&regex, 0, sizeof regex);
91                  s = re_compile_pattern (pat, sizeof pat - 1, &regex);
92                  if (s)
93                    result |= 1;
94                  else if (re_search (&regex, data, sizeof data - 1,
95                                      0, sizeof data - 1, 0)
96                           != 21)
97                    result |= 1;
98                }
99
100                if (! setlocale (LC_ALL, "C"))
101                  return 1;
102              }
103
104            /* This test is from glibc bug 3957, reported by Andrew Mackey.  */
105            re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
106            memset (&regex, 0, sizeof regex);
107            s = re_compile_pattern ("a[^x]b", 6, &regex);
108            if (s)
109              result |= 2;
110            /* This should fail, but succeeds for glibc-2.5.  */
111            else if (re_search (&regex, "a\nb", 3, 0, 3, &regs) != -1)
112              result |= 2;
113
114            /* This regular expression is from Spencer ere test number 75
115               in grep-2.3.  */
116            re_set_syntax (RE_SYNTAX_POSIX_EGREP);
117            memset (&regex, 0, sizeof regex);
118            for (i = 0; i <= UCHAR_MAX; i++)
119              folded_chars[i] = i;
120            regex.translate = folded_chars;
121            s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, &regex);
122            /* This should fail with _Invalid character class name_ error.  */
123            if (!s)
124              result |= 4;
125
126            /* Ensure that [b-a] is diagnosed as invalid, when
127               using RE_NO_EMPTY_RANGES. */
128            re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES);
129            memset (&regex, 0, sizeof regex);
130            s = re_compile_pattern ("a[b-a]", 6, &regex);
131            if (s == 0)
132              result |= 8;
133
134            /* This should succeed, but does not for glibc-2.1.3.  */
135            memset (&regex, 0, sizeof regex);
136            s = re_compile_pattern ("{1", 2, &regex);
137            if (s)
138              result |= 8;
139
140            /* The following example is derived from a problem report
141               against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
142            memset (&regex, 0, sizeof regex);
143            s = re_compile_pattern ("[an\371]*n", 7, &regex);
144            if (s)
145              result |= 8;
146            /* This should match, but does not for glibc-2.2.1.  */
147            else if (re_match (&regex, "an", 2, 0, &regs) != 2)
148              result |= 8;
149
150            memset (&regex, 0, sizeof regex);
151            s = re_compile_pattern ("x", 1, &regex);
152            if (s)
153              result |= 8;
154            /* glibc-2.2.93 does not work with a negative RANGE argument.  */
155            else if (re_search (&regex, "wxy", 3, 2, -2, &regs) != 1)
156              result |= 8;
157
158            /* The version of regex.c in older versions of gnulib
159               ignored RE_ICASE.  Detect that problem too.  */
160            re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
161            memset (&regex, 0, sizeof regex);
162            s = re_compile_pattern ("x", 1, &regex);
163            if (s)
164              result |= 16;
165            else if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 0)
166              result |= 16;
167
168            /* Catch a bug reported by Vin Shelton in
169               http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html
170               */
171            re_set_syntax (RE_SYNTAX_POSIX_BASIC
172                           & ~RE_CONTEXT_INVALID_DUP
173                           & ~RE_NO_EMPTY_RANGES);
174            memset (&regex, 0, sizeof regex);
175            s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, &regex);
176            if (s)
177              result |= 32;
178
179            /* REG_STARTEND was added to glibc on 2004-01-15.
180               Reject older versions.  */
181            if (! REG_STARTEND)
182              result |= 64;
183
184#if 0
185            /* It would be nice to reject hosts whose regoff_t values are too
186               narrow (including glibc on hosts with 64-bit ptrdiff_t and
187               32-bit int), but we should wait until glibc implements this
188               feature.  Otherwise, support for equivalence classes and
189               multibyte collation symbols would always be broken except
190               when compiling --without-included-regex.   */
191            if (sizeof (regoff_t) < sizeof (ptrdiff_t)
192                || sizeof (regoff_t) < sizeof (ssize_t))
193              result |= 64;
194#endif
195
196            return result;
197          ]])],
198       [gl_cv_func_re_compile_pattern_working=yes],
199       [gl_cv_func_re_compile_pattern_working=no],
200       dnl When crosscompiling, assume it is not working.
201       [gl_cv_func_re_compile_pattern_working=no])])
202    case $gl_cv_func_re_compile_pattern_working in #(
203    yes) ac_use_included_regex=no;; #(
204    no) ac_use_included_regex=yes;;
205    esac
206    ;;
207  *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
208    ;;
209  esac
210
211  if test $ac_use_included_regex = yes; then
212    AC_DEFINE([_REGEX_INCLUDE_LIMITS_H], [1],
213      [Define if you want <regex.h> to include <limits.h>, so that it
214       consistently overrides <limits.h>'s RE_DUP_MAX.])
215    AC_DEFINE([_REGEX_LARGE_OFFSETS], [1],
216      [Define if you want regoff_t to be at least as wide POSIX requires.])
217    AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
218      [Define to rpl_re_syntax_options if the replacement should be used.])
219    AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
220      [Define to rpl_re_set_syntax if the replacement should be used.])
221    AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
222      [Define to rpl_re_compile_pattern if the replacement should be used.])
223    AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
224      [Define to rpl_re_compile_fastmap if the replacement should be used.])
225    AC_DEFINE([re_search], [rpl_re_search],
226      [Define to rpl_re_search if the replacement should be used.])
227    AC_DEFINE([re_search_2], [rpl_re_search_2],
228      [Define to rpl_re_search_2 if the replacement should be used.])
229    AC_DEFINE([re_match], [rpl_re_match],
230      [Define to rpl_re_match if the replacement should be used.])
231    AC_DEFINE([re_match_2], [rpl_re_match_2],
232      [Define to rpl_re_match_2 if the replacement should be used.])
233    AC_DEFINE([re_set_registers], [rpl_re_set_registers],
234      [Define to rpl_re_set_registers if the replacement should be used.])
235    AC_DEFINE([re_comp], [rpl_re_comp],
236      [Define to rpl_re_comp if the replacement should be used.])
237    AC_DEFINE([re_exec], [rpl_re_exec],
238      [Define to rpl_re_exec if the replacement should be used.])
239    AC_DEFINE([regcomp], [rpl_regcomp],
240      [Define to rpl_regcomp if the replacement should be used.])
241    AC_DEFINE([regexec], [rpl_regexec],
242      [Define to rpl_regexec if the replacement should be used.])
243    AC_DEFINE([regerror], [rpl_regerror],
244      [Define to rpl_regerror if the replacement should be used.])
245    AC_DEFINE([regfree], [rpl_regfree],
246      [Define to rpl_regfree if the replacement should be used.])
247  fi
248])
249
250# Prerequisites of lib/regex.c and lib/regex_internal.c.
251AC_DEFUN([gl_PREREQ_REGEX],
252[
253  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
254  AC_REQUIRE([AC_C_INLINE])
255  AC_REQUIRE([AC_C_RESTRICT])
256  AC_REQUIRE([AC_TYPE_MBSTATE_T])
257  AC_REQUIRE([gl_EEMALLOC])
258  AC_CHECK_HEADERS([libintl.h])
259  AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
260  AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])
261])
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