#serial 46 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, # 2006, 2007 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_CHECK_HEADERS_ONCE([locale.h]) AC_ARG_WITH([included-regex], [AC_HELP_STRING([--without-included-regex], [don't compile regex; this is the default on 32-bit systems with recent-enough versions of the GNU C Library (use with caution on other systems). On systems with 64-bit ptrdiff_t and 32-bit int, --with-included-regex is the default, in case regex functions operate on very long strings (>2GB)])]) 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_CACHE_CHECK([for working re_compile_pattern], [gl_cv_func_re_compile_pattern_working], [AC_RUN_IFELSE( [AC_LANG_PROGRAM( [AC_INCLUDES_DEFAULT #if HAVE_LOCALE_H #include #endif #include #include ], [[static struct re_pattern_buffer regex; unsigned char folded_chars[UCHAR_MAX + 1]; int i; const char *s; struct re_registers regs; #if HAVE_LOCALE_H /* 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. */ if (setlocale (LC_ALL, "en_US.UTF-8")) { 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) return 1; if (re_search (®ex, data, sizeof data - 1, 0, sizeof data - 1, ®s) != -1) return 1; if (! setlocale (LC_ALL, "C")) return 1; } #endif /* 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) return 1; /* This should fail, but succeeds for glibc-2.5. */ if (re_search (®ex, "a\nb", 3, 0, 3, ®s) != -1) return 1; /* 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) return 1; /* 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) return 1; /* The following example is derived from a problem report against gawk from Jorge Stolfi . */ memset (®ex, 0, sizeof regex); s = re_compile_pattern ("[an\371]*n", 7, ®ex); if (s) return 1; /* This should match, but does not for glibc-2.2.1. */ if (re_match (®ex, "an", 2, 0, ®s) != 2) return 1; memset (®ex, 0, sizeof regex); s = re_compile_pattern ("x", 1, ®ex); if (s) return 1; /* glibc-2.2.93 does not work with a negative RANGE argument. */ if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1) return 1; /* 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) return 1; if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0) return 1; /* REG_STARTEND was added to glibc on 2004-01-15. Reject older versions. */ if (! REG_STARTEND) return 1; /* Reject hosts whose regoff_t values are too narrow. These include glibc 2.3.5 on hosts with 64-bit ptrdiff_t and 32-bit int. */ if (sizeof (regoff_t) < sizeof (ptrdiff_t) || sizeof (regoff_t) < sizeof (ssize_t)) return 1; return 0;]])], [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_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.]) AC_LIBOBJ([regex]) gl_PREREQ_REGEX fi ]) # Prerequisites of lib/regex.c and lib/regex_internal.c. AC_DEFUN([gl_PREREQ_REGEX], [ AC_REQUIRE([AC_GNU_SOURCE]) AC_REQUIRE([AC_C_RESTRICT]) AC_CHECK_FUNCS_ONCE([iswctype mbrtowc wcrtomb wcscoll]) AC_CHECK_DECLS([isblank], [], [], [#include ]) ])