| # serial 64 |
| |
| # Copyright (C) 1996-2001, 2003-2013 Free Software Foundation, Inc. |
| # |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| dnl Initially derived from code in GNU grep. |
| dnl Mostly written by Jim Meyering. |
| |
| AC_PREREQ([2.50]) |
| |
| AC_DEFUN([gl_REGEX], |
| [ |
| AC_ARG_WITH([included-regex], |
| [AS_HELP_STRING([--without-included-regex], |
| [don't compile regex; this is the default on systems |
| with recent-enough versions of the GNU C Library |
| (use with caution on other systems).])]) |
| |
| case $with_included_regex in #( |
| yes|no) ac_use_included_regex=$with_included_regex |
| ;; |
| '') |
| # If the system regex support is good enough that it passes the |
| # following run test, then default to *not* using the included regex.c. |
| # If cross compiling, assume the test would fail and use the included |
| # regex.c. |
| AC_CHECK_DECLS_ONCE([alarm]) |
| AC_CACHE_CHECK([for working re_compile_pattern], |
| [gl_cv_func_re_compile_pattern_working], |
| [AC_RUN_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <regex.h> |
| |
| #include <locale.h> |
| #include <limits.h> |
| #include <string.h> |
| #if HAVE_DECL_ALARM |
| # include <unistd.h> |
| # include <signal.h> |
| #endif |
| ]], |
| [[int result = 0; |
| static struct re_pattern_buffer regex; |
| unsigned char folded_chars[UCHAR_MAX + 1]; |
| int i; |
| const char *s; |
| struct re_registers regs; |
| |
| #if HAVE_DECL_ALARM |
| /* Some builds of glibc go into an infinite loop on this test. */ |
| signal (SIGALRM, SIG_DFL); |
| alarm (2); |
| #endif |
| if (setlocale (LC_ALL, "en_US.UTF-8")) |
| { |
| { |
| /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html |
| This test needs valgrind to catch the bug on Debian |
| GNU/Linux 3.1 x86, but it might catch the bug better |
| on other platforms and it shouldn't hurt to try the |
| test here. */ |
| static char const pat[] = "insert into"; |
| static char const data[] = |
| "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK"; |
| re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE |
| | RE_ICASE); |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern (pat, sizeof pat - 1, ®ex); |
| if (s) |
| result |= 1; |
| else if (re_search (®ex, data, sizeof data - 1, |
| 0, sizeof data - 1, ®s) |
| != -1) |
| result |= 1; |
| } |
| |
| { |
| /* This test is from glibc bug 15078. |
| The test case is from Andreas Schwab in |
| <http://www.sourceware.org/ml/libc-alpha/2013-01/msg00967.html>. |
| */ |
| static char const pat[] = "[^x]x"; |
| static char const data[] = |
| "\xe1\x80\x80\xe1\x80\xbb\xe1\x80\xbd\xe1\x80\x94\xe1\x80" |
| "\xba\xe1\x80\xaf\xe1\x80\x95\xe1\x80\xbax"; |
| re_set_syntax (0); |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern (pat, sizeof pat - 1, ®ex); |
| if (s) |
| result |= 1; |
| else if (re_search (®ex, data, sizeof data - 1, |
| 0, sizeof data - 1, 0) |
| != 21) |
| result |= 1; |
| } |
| |
| if (! setlocale (LC_ALL, "C")) |
| return 1; |
| } |
| |
| /* This test is from glibc bug 3957, reported by Andrew Mackey. */ |
| re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE); |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern ("a[^x]b", 6, ®ex); |
| if (s) |
| result |= 2; |
| /* This should fail, but succeeds for glibc-2.5. */ |
| else if (re_search (®ex, "a\nb", 3, 0, 3, ®s) != -1) |
| result |= 2; |
| |
| /* This regular expression is from Spencer ere test number 75 |
| in grep-2.3. */ |
| re_set_syntax (RE_SYNTAX_POSIX_EGREP); |
| memset (®ex, 0, sizeof regex); |
| for (i = 0; i <= UCHAR_MAX; i++) |
| folded_chars[i] = i; |
| regex.translate = folded_chars; |
| s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex); |
| /* This should fail with _Invalid character class name_ error. */ |
| if (!s) |
| result |= 4; |
| |
| /* Ensure that [b-a] is diagnosed as invalid, when |
| using RE_NO_EMPTY_RANGES. */ |
| re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES); |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern ("a[b-a]", 6, ®ex); |
| if (s == 0) |
| result |= 8; |
| |
| /* This should succeed, but does not for glibc-2.1.3. */ |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern ("{1", 2, ®ex); |
| if (s) |
| result |= 8; |
| |
| /* The following example is derived from a problem report |
| against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */ |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern ("[an\371]*n", 7, ®ex); |
| if (s) |
| result |= 8; |
| /* This should match, but does not for glibc-2.2.1. */ |
| else if (re_match (®ex, "an", 2, 0, ®s) != 2) |
| result |= 8; |
| |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern ("x", 1, ®ex); |
| if (s) |
| result |= 8; |
| /* glibc-2.2.93 does not work with a negative RANGE argument. */ |
| else if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1) |
| result |= 8; |
| |
| /* The version of regex.c in older versions of gnulib |
| ignored RE_ICASE. Detect that problem too. */ |
| re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE); |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern ("x", 1, ®ex); |
| if (s) |
| result |= 16; |
| else if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0) |
| result |= 16; |
| |
| /* Catch a bug reported by Vin Shelton in |
| http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html |
| */ |
| re_set_syntax (RE_SYNTAX_POSIX_BASIC |
| & ~RE_CONTEXT_INVALID_DUP |
| & ~RE_NO_EMPTY_RANGES); |
| memset (®ex, 0, sizeof regex); |
| s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, ®ex); |
| if (s) |
| result |= 32; |
| |
| /* REG_STARTEND was added to glibc on 2004-01-15. |
| Reject older versions. */ |
| if (! REG_STARTEND) |
| result |= 64; |
| |
| #if 0 |
| /* It would be nice to reject hosts whose regoff_t values are too |
| narrow (including glibc on hosts with 64-bit ptrdiff_t and |
| 32-bit int), but we should wait until glibc implements this |
| feature. Otherwise, support for equivalence classes and |
| multibyte collation symbols would always be broken except |
| when compiling --without-included-regex. */ |
| if (sizeof (regoff_t) < sizeof (ptrdiff_t) |
| || sizeof (regoff_t) < sizeof (ssize_t)) |
| result |= 64; |
| #endif |
| |
| return result; |
| ]])], |
| [gl_cv_func_re_compile_pattern_working=yes], |
| [gl_cv_func_re_compile_pattern_working=no], |
| dnl When crosscompiling, assume it is not working. |
| [gl_cv_func_re_compile_pattern_working=no])]) |
| case $gl_cv_func_re_compile_pattern_working in #( |
| yes) ac_use_included_regex=no;; #( |
| no) ac_use_included_regex=yes;; |
| esac |
| ;; |
| *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex]) |
| ;; |
| esac |
| |
| if test $ac_use_included_regex = yes; then |
| AC_DEFINE([_REGEX_INCLUDE_LIMITS_H], [1], |
| [Define if you want <regex.h> to include <limits.h>, so that it |
| consistently overrides <limits.h>'s RE_DUP_MAX.]) |
| AC_DEFINE([_REGEX_LARGE_OFFSETS], [1], |
| [Define if you want regoff_t to be at least as wide POSIX requires.]) |
| AC_DEFINE([re_syntax_options], [rpl_re_syntax_options], |
| [Define to rpl_re_syntax_options if the replacement should be used.]) |
| AC_DEFINE([re_set_syntax], [rpl_re_set_syntax], |
| [Define to rpl_re_set_syntax if the replacement should be used.]) |
| AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern], |
| [Define to rpl_re_compile_pattern if the replacement should be used.]) |
| AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap], |
| [Define to rpl_re_compile_fastmap if the replacement should be used.]) |
| AC_DEFINE([re_search], [rpl_re_search], |
| [Define to rpl_re_search if the replacement should be used.]) |
| AC_DEFINE([re_search_2], [rpl_re_search_2], |
| [Define to rpl_re_search_2 if the replacement should be used.]) |
| AC_DEFINE([re_match], [rpl_re_match], |
| [Define to rpl_re_match if the replacement should be used.]) |
| AC_DEFINE([re_match_2], [rpl_re_match_2], |
| [Define to rpl_re_match_2 if the replacement should be used.]) |
| AC_DEFINE([re_set_registers], [rpl_re_set_registers], |
| [Define to rpl_re_set_registers if the replacement should be used.]) |
| AC_DEFINE([re_comp], [rpl_re_comp], |
| [Define to rpl_re_comp if the replacement should be used.]) |
| AC_DEFINE([re_exec], [rpl_re_exec], |
| [Define to rpl_re_exec if the replacement should be used.]) |
| AC_DEFINE([regcomp], [rpl_regcomp], |
| [Define to rpl_regcomp if the replacement should be used.]) |
| AC_DEFINE([regexec], [rpl_regexec], |
| [Define to rpl_regexec if the replacement should be used.]) |
| AC_DEFINE([regerror], [rpl_regerror], |
| [Define to rpl_regerror if the replacement should be used.]) |
| AC_DEFINE([regfree], [rpl_regfree], |
| [Define to rpl_regfree if the replacement should be used.]) |
| fi |
| ]) |
| |
| # Prerequisites of lib/regex.c and lib/regex_internal.c. |
| AC_DEFUN([gl_PREREQ_REGEX], |
| [ |
| AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
| AC_REQUIRE([AC_C_INLINE]) |
| AC_REQUIRE([AC_C_RESTRICT]) |
| AC_REQUIRE([AC_TYPE_MBSTATE_T]) |
| AC_REQUIRE([gl_EEMALLOC]) |
| AC_CHECK_HEADERS([libintl.h]) |
| AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll]) |
| AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]]) |
| ]) |
