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-rw-r--r--gl/m4/gnulib-cache.m43
-rw-r--r--gl/m4/gnulib-comp.m415
-rw-r--r--gl/m4/strcasestr.m4142
3 files changed, 159 insertions, 1 deletions
diff --git a/gl/m4/gnulib-cache.m4 b/gl/m4/gnulib-cache.m4
index d6fca2a..90ad4aa 100644
--- a/gl/m4/gnulib-cache.m4
+++ b/gl/m4/gnulib-cache.m4
@@ -27,7 +27,7 @@
27 27
28 28
29# Specification in the form of a command-line invocation: 29# Specification in the form of a command-line invocation:
30# gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files base64 crypto/sha1 dirname environ floorf fsusage getaddrinfo gethostname getloadavg getopt-gnu gettext idpriv-droptemp mountlist regex setenv strcase strsep timegm unsetenv vasprintf vsnprintf 30# gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files base64 crypto/sha1 dirname environ floorf fsusage getaddrinfo gethostname getloadavg getopt-gnu gettext idpriv-droptemp mountlist regex setenv strcase strcasestr strsep timegm unsetenv vasprintf vsnprintf
31 31
32# Specification in the form of a few gnulib-tool.m4 macro invocations: 32# Specification in the form of a few gnulib-tool.m4 macro invocations:
33gl_LOCAL_DIR([]) 33gl_LOCAL_DIR([])
@@ -48,6 +48,7 @@ gl_MODULES([
48 regex 48 regex
49 setenv 49 setenv
50 strcase 50 strcase
51 strcasestr
51 strsep 52 strsep
52 timegm 53 timegm
53 unsetenv 54 unsetenv
diff --git a/gl/m4/gnulib-comp.m4 b/gl/m4/gnulib-comp.m4
index 67a8156..9a4f502 100644
--- a/gl/m4/gnulib-comp.m4
+++ b/gl/m4/gnulib-comp.m4
@@ -121,6 +121,8 @@ AC_DEFUN([gl_EARLY],
121 # Code from module stdio: 121 # Code from module stdio:
122 # Code from module stdlib: 122 # Code from module stdlib:
123 # Code from module strcase: 123 # Code from module strcase:
124 # Code from module strcasestr:
125 # Code from module strcasestr-simple:
124 # Code from module streq: 126 # Code from module streq:
125 # Code from module strerror: 127 # Code from module strerror:
126 # Code from module strerror-override: 128 # Code from module strerror-override:
@@ -390,6 +392,17 @@ AC_DEFUN([gl_INIT],
390 AC_LIBOBJ([strncasecmp]) 392 AC_LIBOBJ([strncasecmp])
391 gl_PREREQ_STRNCASECMP 393 gl_PREREQ_STRNCASECMP
392 fi 394 fi
395 gl_FUNC_STRCASESTR
396 if test $HAVE_STRCASESTR = 0 || test $REPLACE_STRCASESTR = 1; then
397 AC_LIBOBJ([strcasestr])
398 gl_PREREQ_STRCASESTR
399 fi
400 gl_FUNC_STRCASESTR_SIMPLE
401 if test $HAVE_STRCASESTR = 0 || test $REPLACE_STRCASESTR = 1; then
402 AC_LIBOBJ([strcasestr])
403 gl_PREREQ_STRCASESTR
404 fi
405 gl_STRING_MODULE_INDICATOR([strcasestr])
393 gl_FUNC_STRERROR 406 gl_FUNC_STRERROR
394 if test $REPLACE_STRERROR = 1; then 407 if test $REPLACE_STRERROR = 1; then
395 AC_LIBOBJ([strerror]) 408 AC_LIBOBJ([strerror])
@@ -723,6 +736,7 @@ AC_DEFUN([gl_FILE_LIST], [
723 lib/stdlib.in.h 736 lib/stdlib.in.h
724 lib/str-two-way.h 737 lib/str-two-way.h
725 lib/strcasecmp.c 738 lib/strcasecmp.c
739 lib/strcasestr.c
726 lib/streq.h 740 lib/streq.h
727 lib/strerror-override.c 741 lib/strerror-override.c
728 lib/strerror-override.h 742 lib/strerror-override.h
@@ -866,6 +880,7 @@ AC_DEFUN([gl_FILE_LIST], [
866 m4/stdio_h.m4 880 m4/stdio_h.m4
867 m4/stdlib_h.m4 881 m4/stdlib_h.m4
868 m4/strcase.m4 882 m4/strcase.m4
883 m4/strcasestr.m4
869 m4/strerror.m4 884 m4/strerror.m4
870 m4/string_h.m4 885 m4/string_h.m4
871 m4/strings_h.m4 886 m4/strings_h.m4
diff --git a/gl/m4/strcasestr.m4 b/gl/m4/strcasestr.m4
new file mode 100644
index 0000000..8681a6a
--- /dev/null
+++ b/gl/m4/strcasestr.m4
@@ -0,0 +1,142 @@
1# strcasestr.m4 serial 21
2dnl Copyright (C) 2005, 2007-2013 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl Check that strcasestr is present and works.
8AC_DEFUN([gl_FUNC_STRCASESTR_SIMPLE],
9[
10 AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
11
12 dnl Persuade glibc <string.h> to declare strcasestr().
13 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
14
15 AC_REQUIRE([gl_FUNC_MEMCHR])
16 AC_CHECK_FUNCS([strcasestr])
17 if test $ac_cv_func_strcasestr = no; then
18 HAVE_STRCASESTR=0
19 else
20 if test "$gl_cv_func_memchr_works" != yes; then
21 REPLACE_STRCASESTR=1
22 else
23 dnl Detect http://sourceware.org/bugzilla/show_bug.cgi?id=12092.
24 AC_CACHE_CHECK([whether strcasestr works],
25 [gl_cv_func_strcasestr_works_always],
26 [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
27#include <string.h> /* for strcasestr */
28#define P "_EF_BF_BD"
29#define HAYSTACK "F_BD_CE_BD" P P P P "_C3_88_20" P P P "_C3_A7_20" P
30#define NEEDLE P P P P P
31]], [[return !!strcasestr (HAYSTACK, NEEDLE);
32 ]])],
33 [gl_cv_func_strcasestr_works_always=yes],
34 [gl_cv_func_strcasestr_works_always=no],
35 [dnl glibc 2.12 and cygwin 1.7.7 have a known bug. uClibc is not
36 dnl affected, since it uses different source code for strcasestr
37 dnl than glibc.
38 dnl Assume that it works on all other platforms, even if it is not
39 dnl linear.
40 AC_EGREP_CPP([Lucky user],
41 [
42#ifdef __GNU_LIBRARY__
43 #include <features.h>
44 #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
45 || defined __UCLIBC__
46 Lucky user
47 #endif
48#elif defined __CYGWIN__
49 #include <cygwin/version.h>
50 #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 7)
51 Lucky user
52 #endif
53#else
54 Lucky user
55#endif
56 ],
57 [gl_cv_func_strcasestr_works_always="guessing yes"],
58 [gl_cv_func_strcasestr_works_always="guessing no"])
59 ])
60 ])
61 case "$gl_cv_func_strcasestr_works_always" in
62 *yes) ;;
63 *)
64 REPLACE_STRCASESTR=1
65 ;;
66 esac
67 fi
68 fi
69]) # gl_FUNC_STRCASESTR_SIMPLE
70
71dnl Additionally, check that strcasestr is efficient.
72AC_DEFUN([gl_FUNC_STRCASESTR],
73[
74 AC_REQUIRE([gl_FUNC_STRCASESTR_SIMPLE])
75 if test $HAVE_STRCASESTR = 1 && test $REPLACE_STRCASESTR = 0; then
76 AC_CACHE_CHECK([whether strcasestr works in linear time],
77 [gl_cv_func_strcasestr_linear],
78 [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
79#include <signal.h> /* for signal */
80#include <string.h> /* for strcasestr */
81#include <stdlib.h> /* for malloc */
82#include <unistd.h> /* for alarm */
83static void quit (int sig) { exit (sig + 128); }
84]], [[
85 int result = 0;
86 size_t m = 1000000;
87 char *haystack = (char *) malloc (2 * m + 2);
88 char *needle = (char *) malloc (m + 2);
89 /* Failure to compile this test due to missing alarm is okay,
90 since all such platforms (mingw) also lack strcasestr. */
91 signal (SIGALRM, quit);
92 alarm (5);
93 /* Check for quadratic performance. */
94 if (haystack && needle)
95 {
96 memset (haystack, 'A', 2 * m);
97 haystack[2 * m] = 'B';
98 haystack[2 * m + 1] = 0;
99 memset (needle, 'A', m);
100 needle[m] = 'B';
101 needle[m + 1] = 0;
102 if (!strcasestr (haystack, needle))
103 result |= 1;
104 }
105 return result;
106 ]])],
107 [gl_cv_func_strcasestr_linear=yes], [gl_cv_func_strcasestr_linear=no],
108 [dnl Only glibc > 2.12 and cygwin > 1.7.7 are known to have a
109 dnl strcasestr that works in linear time.
110 AC_EGREP_CPP([Lucky user],
111 [
112#include <features.h>
113#ifdef __GNU_LIBRARY__
114 #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
115 && !defined __UCLIBC__
116 Lucky user
117 #endif
118#endif
119#ifdef __CYGWIN__
120 #include <cygwin/version.h>
121 #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 7)
122 Lucky user
123 #endif
124#endif
125 ],
126 [gl_cv_func_strcasestr_linear="guessing yes"],
127 [gl_cv_func_strcasestr_linear="guessing no"])
128 ])
129 ])
130 case "$gl_cv_func_strcasestr_linear" in
131 *yes) ;;
132 *)
133 REPLACE_STRCASESTR=1
134 ;;
135 esac
136 fi
137]) # gl_FUNC_STRCASESTR
138
139# Prerequisites of lib/strcasestr.c.
140AC_DEFUN([gl_PREREQ_STRCASESTR], [
141 :
142])