a61545ac274f7479c98ddebf12f5e3ac7257a690
[platform/upstream/diffutils.git] / m4 / fnmatch.m4
1 # Check for fnmatch - serial 13.  -*- coding: utf-8 -*-
2
3 # Copyright (C) 2000-2007, 2009-2018 Free Software Foundation, Inc.
4 # This file is free software; the Free Software Foundation
5 # gives unlimited permission to copy and/or distribute it,
6 # with or without modifications, as long as this notice is preserved.
7
8 # Autoconf defines AC_FUNC_FNMATCH, but that is obsolescent.
9 # New applications should use the macros below instead.
10
11 # Request a POSIX compliant fnmatch function.
12 AC_DEFUN([gl_FUNC_FNMATCH_POSIX],
13 [
14   m4_divert_text([DEFAULTS], [gl_fnmatch_required=POSIX])
15
16   AC_REQUIRE([gl_FNMATCH_H])
17   gl_fnmatch_required_lowercase=`
18     echo $gl_fnmatch_required | LC_ALL=C tr '[[A-Z]]' '[[a-z]]'
19   `
20   AC_CHECK_FUNCS_ONCE([fnmatch])
21   if test $ac_cv_func_fnmatch = no; then
22     HAVE_FNMATCH=0
23   else
24     gl_fnmatch_cache_var="gl_cv_func_fnmatch_${gl_fnmatch_required_lowercase}"
25     AC_CACHE_CHECK([for working $gl_fnmatch_required fnmatch],
26       [$gl_fnmatch_cache_var],
27       [dnl Some versions of Solaris, SCO, and the GNU C Library
28        dnl have a broken or incompatible fnmatch.
29        dnl So we run a test program.  If we are cross-compiling, take no chance.
30        dnl Thanks to John Oleynick, François Pinard, and Paul Eggert for this
31        dnl test.
32        if test $gl_fnmatch_required = GNU; then
33          gl_fnmatch_gnu_start=
34          gl_fnmatch_gnu_end=
35        else
36          gl_fnmatch_gnu_start='#if 0'
37          gl_fnmatch_gnu_end='#endif'
38        fi
39        AC_RUN_IFELSE(
40          [AC_LANG_PROGRAM(
41             [[#include <fnmatch.h>
42               static int
43               y (char const *pattern, char const *string, int flags)
44               {
45                 return fnmatch (pattern, string, flags) == 0;
46               }
47               static int
48               n (char const *pattern, char const *string, int flags)
49               {
50                 return fnmatch (pattern, string, flags) == FNM_NOMATCH;
51               }
52             ]],
53             [[char const *Apat = 'A' < '\\\\' ? "[A-\\\\\\\\]" : "[\\\\\\\\-A]";
54               char const *apat = 'a' < '\\\\' ? "[a-\\\\\\\\]" : "[\\\\\\\\-a]";
55               static char const A_1[] = { 'A' - 1, 0 };
56               static char const A01[] = { 'A' + 1, 0 };
57               static char const a_1[] = { 'a' - 1, 0 };
58               static char const a01[] = { 'a' + 1, 0 };
59               static char const bs_1[] = { '\\\\' - 1, 0 };
60               static char const bs01[] = { '\\\\' + 1, 0 };
61               int result = 0;
62               if (!n ("a*", "", 0))
63                 return 1;
64               if (!y ("a*", "abc", 0))
65                 return 1;
66               if (!y ("[/b", "[/b", 0)) /*"]]"*/ /* glibc Bugzilla bug 12378 */
67                 return 1;
68               if (!n ("d*/*1", "d/s/1", FNM_PATHNAME))
69                 return 2;
70               if (!y ("a\\\\bc", "abc", 0))
71                 return 3;
72               if (!n ("a\\\\bc", "abc", FNM_NOESCAPE))
73                 return 3;
74               if (!y ("*x", ".x", 0))
75                 return 4;
76               if (!n ("*x", ".x", FNM_PERIOD))
77                 return 4;
78               if (!y (Apat, "\\\\", 0))
79                 return 5;
80               if (!y (Apat, "A", 0))
81                 return 5;
82               if (!y (apat, "\\\\", 0))
83                 return 5;
84               if (!y (apat, "a", 0))
85                 return 5;
86               if (!(n (Apat, A_1, 0) == ('A' < '\\\\')))
87                 return 5;
88               if (!(n (apat, a_1, 0) == ('a' < '\\\\')))
89                 return 5;
90               if (!(y (Apat, A01, 0) == ('A' < '\\\\')))
91                 return 5;
92               if (!(y (apat, a01, 0) == ('a' < '\\\\')))
93                 return 5;
94               if (!(y (Apat, bs_1, 0) == ('A' < '\\\\')))
95                 return 5;
96               if (!(y (apat, bs_1, 0) == ('a' < '\\\\')))
97                 return 5;
98               if (!(n (Apat, bs01, 0) == ('A' < '\\\\')))
99                 return 5;
100               if (!(n (apat, bs01, 0) == ('a' < '\\\\')))
101                 return 5;
102               $gl_fnmatch_gnu_start
103               if (!y ("xxXX", "xXxX", FNM_CASEFOLD))
104                 result |= 8;
105               if (!y ("a++(x|yy)b", "a+xyyyyxb", FNM_EXTMATCH))
106                 result |= 16;
107               if (!n ("d*/*1", "d/s/1", FNM_FILE_NAME))
108                 result |= 32;
109               if (!y ("*", "x", FNM_FILE_NAME | FNM_LEADING_DIR))
110                 result |= 64;
111               if (!y ("x*", "x/y/z", FNM_FILE_NAME | FNM_LEADING_DIR))
112                 result |= 64;
113               if (!y ("*c*", "c/x", FNM_FILE_NAME | FNM_LEADING_DIR))
114                 result |= 64;
115               $gl_fnmatch_gnu_end
116               return result;
117             ]])],
118          [eval "$gl_fnmatch_cache_var=yes"],
119          [eval "$gl_fnmatch_cache_var=no"],
120          [eval "$gl_fnmatch_cache_var=\"guessing no\""])
121       ])
122     eval "gl_fnmatch_result=\"\$$gl_fnmatch_cache_var\""
123     if test "$gl_fnmatch_result" != yes; then
124       REPLACE_FNMATCH=1
125     fi
126   fi
127   if test $HAVE_FNMATCH = 0 || test $REPLACE_FNMATCH = 1; then
128     gl_REPLACE_FNMATCH_H
129   fi
130 ])
131
132 # Request a POSIX compliant fnmatch function with GNU extensions.
133 AC_DEFUN([gl_FUNC_FNMATCH_GNU],
134 [
135   m4_divert_text([INIT_PREPARE], [gl_fnmatch_required=GNU])
136
137   AC_REQUIRE([gl_FUNC_FNMATCH_POSIX])
138 ])
139
140 AC_DEFUN([gl_PREREQ_FNMATCH],
141 [
142   dnl Prerequisites of lib/fnmatch.c.
143   AC_REQUIRE([AC_TYPE_MBSTATE_T])
144   AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])
145   AC_CHECK_FUNCS_ONCE([btowc isblank iswctype mbsrtowcs mempcpy wmemchr wmemcpy wmempcpy])
146   AC_CHECK_HEADERS_ONCE([wctype.h])
147 ])