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