| 1 | # serial 63 |
| 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 | |
| 9 | dnl Initially derived from code in GNU grep. |
| 10 | dnl Mostly written by Jim Meyering. |
| 11 | |
| 12 | AC_PREREQ([2.50]) |
| 13 | |
| 14 | AC_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_FUNCS_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_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_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 (®ex, 0, sizeof regex); |
| 71 | s = re_compile_pattern (pat, sizeof pat - 1, ®ex); |
| 72 | if (s) |
| 73 | result |= 1; |
| 74 | else if (re_search (®ex, data, sizeof data - 1, |
| 75 | 0, sizeof data - 1, ®s) |
| 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 (®ex, 0, sizeof regex); |
| 91 | s = re_compile_pattern (pat, sizeof pat - 1, ®ex); |
| 92 | if (s) |
| 93 | result |= 1; |
| 94 | else if (re_search (®ex, 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 (®ex, 0, sizeof regex); |
| 107 | s = re_compile_pattern ("a[^x]b", 6, ®ex); |
| 108 | if (s) |
| 109 | result |= 2; |
| 110 | /* This should fail, but succeeds for glibc-2.5. */ |
| 111 | else if (re_search (®ex, "a\nb", 3, 0, 3, ®s) != -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 (®ex, 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, ®ex); |
| 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 (®ex, 0, sizeof regex); |
| 130 | s = re_compile_pattern ("a[b-a]", 6, ®ex); |
| 131 | if (s == 0) |
| 132 | result |= 8; |
| 133 | |
| 134 | /* This should succeed, but does not for glibc-2.1.3. */ |
| 135 | memset (®ex, 0, sizeof regex); |
| 136 | s = re_compile_pattern ("{1", 2, ®ex); |
| 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 (®ex, 0, sizeof regex); |
| 143 | s = re_compile_pattern ("[an\371]*n", 7, ®ex); |
| 144 | if (s) |
| 145 | result |= 8; |
| 146 | /* This should match, but does not for glibc-2.2.1. */ |
| 147 | else if (re_match (®ex, "an", 2, 0, ®s) != 2) |
| 148 | result |= 8; |
| 149 | |
| 150 | memset (®ex, 0, sizeof regex); |
| 151 | s = re_compile_pattern ("x", 1, ®ex); |
| 152 | if (s) |
| 153 | result |= 8; |
| 154 | /* glibc-2.2.93 does not work with a negative RANGE argument. */ |
| 155 | else if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 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 (®ex, 0, sizeof regex); |
| 162 | s = re_compile_pattern ("x", 1, ®ex); |
| 163 | if (s) |
| 164 | result |= 16; |
| 165 | else if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 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 (®ex, 0, sizeof regex); |
| 175 | s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, ®ex); |
| 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. |
| 251 | AC_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 | ]) |