# Check for fnmatch - serial 9.  -*- coding: utf-8 -*-

# Copyright (C) 2000-2007, 2009-2018 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.

# Autoconf defines AC_FUNC_FNMATCH, but that is obsolescent.

# New applications should use the macros below instead.

# Request a POSIX compliant fnmatch function.

AC_DEFUN([gl_FUNC_FNMATCH_POSIX],

[

  m4_divert_text([DEFAULTS], [gl_fnmatch_required=POSIX])

  dnl Persuade glibc <fnmatch.h> to declare FNM_CASEFOLD etc.

  dnl This is only needed if gl_fnmatch_required = GNU. It would be possible

  dnl to avoid this dependency for gl_FUNC_FNMATCH_POSIX by putting

  dnl gl_FUNC_FNMATCH_GNU into a separate .m4 file.

  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

  FNMATCH_H=

  gl_fnmatch_required_lowercase=`

    echo $gl_fnmatch_required | LC_ALL=C tr '[[A-Z]]' '[[a-z]]'

  `

  gl_fnmatch_cache_var="gl_cv_func_fnmatch_${gl_fnmatch_required_lowercase}"

  AC_CACHE_CHECK([for working $gl_fnmatch_required fnmatch],

    [$gl_fnmatch_cache_var],

    [dnl Some versions of Solaris, SCO, and the GNU C Library

     dnl have a broken or incompatible fnmatch.

     dnl So we run a test program.  If we are cross-compiling, take no chance.

     dnl Thanks to John Oleynick, François Pinard, and Paul Eggert for this

     dnl test.

     if test $gl_fnmatch_required = GNU; then

       gl_fnmatch_gnu_start=

       gl_fnmatch_gnu_end=

     else

       gl_fnmatch_gnu_start='#if 0'

       gl_fnmatch_gnu_end='#endif'

     fi

     AC_RUN_IFELSE(

       [AC_LANG_PROGRAM(

          [[#include <fnmatch.h>

            static int

            y (char const *pattern, char const *string, int flags)

            {

              return fnmatch (pattern, string, flags) == 0;

            }

            static int

            n (char const *pattern, char const *string, int flags)

            {

              return fnmatch (pattern, string, flags) == FNM_NOMATCH;

            }

          ]],

          [[char const *Apat = 'A' < '\\\\' ? "[A-\\\\\\\\]" : "[\\\\\\\\-A]";

            char const *apat = 'a' < '\\\\' ? "[a-\\\\\\\\]" : "[\\\\\\\\-a]";

            static char const A_1[] = { 'A' - 1, 0 };

            static char const A01[] = { 'A' + 1, 0 };

            static char const a_1[] = { 'a' - 1, 0 };

            static char const a01[] = { 'a' + 1, 0 };

            static char const bs_1[] = { '\\\\' - 1, 0 };

            static char const bs01[] = { '\\\\' + 1, 0 };

            int result = 0;

            if (!n ("a*", "", 0))

              return 1;

            if (!y ("a*", "abc", 0))

              return 1;

            if (!y ("[/b", "[/b", 0)) /*"]]"*/ /* glibc Bugzilla bug 12378 */

              return 1;

            if (!n ("d*/*1", "d/s/1", FNM_PATHNAME))

              return 2;

            if (!y ("a\\\\bc", "abc", 0))

              return 3;

            if (!n ("a\\\\bc", "abc", FNM_NOESCAPE))

              return 3;

            if (!y ("*x", ".x", 0))

              return 4;

            if (!n ("*x", ".x", FNM_PERIOD))

              return 4;

            if (!y (Apat, "\\\\", 0))

              return 5;

            if (!y (Apat, "A", 0))

              return 5;

            if (!y (apat, "\\\\", 0))

              return 5;

            if (!y (apat, "a", 0))

              return 5;

            if (!(n (Apat, A_1, 0) == ('A' < '\\\\')))

              return 5;

            if (!(n (apat, a_1, 0) == ('a' < '\\\\')))

              return 5;

            if (!(y (Apat, A01, 0) == ('A' < '\\\\')))

              return 5;

            if (!(y (apat, a01, 0) == ('a' < '\\\\')))

              return 5;

            if (!(y (Apat, bs_1, 0) == ('A' < '\\\\')))

              return 5;

            if (!(y (apat, bs_1, 0) == ('a' < '\\\\')))

              return 5;

            if (!(n (Apat, bs01, 0) == ('A' < '\\\\')))

              return 5;

            if (!(n (apat, bs01, 0) == ('a' < '\\\\')))

              return 5;

            $gl_fnmatch_gnu_start

            if (!y ("xxXX", "xXxX", FNM_CASEFOLD))

              result |= 8;

            if (!y ("a++(x|yy)b", "a+xyyyyxb", FNM_EXTMATCH))

              result |= 16;

            if (!n ("d*/*1", "d/s/1", FNM_FILE_NAME))

              result |= 32;

            if (!y ("*", "x", FNM_FILE_NAME | FNM_LEADING_DIR))

              result |= 64;

            if (!y ("x*", "x/y/z", FNM_FILE_NAME | FNM_LEADING_DIR))

              result |= 64;

            if (!y ("*c*", "c/x", FNM_FILE_NAME | FNM_LEADING_DIR))

              result |= 64;

            $gl_fnmatch_gnu_end

            return result;

          ]])],

       [eval "$gl_fnmatch_cache_var=yes"],

       [eval "$gl_fnmatch_cache_var=no"],

       [eval "$gl_fnmatch_cache_var=\"guessing no\""])

    ])

  eval "gl_fnmatch_result=\"\$$gl_fnmatch_cache_var\""

  if test "$gl_fnmatch_result" = yes; then

    dnl Not strictly necessary. Only to avoid spurious leftover files if people

    dnl don't do "make distclean".

    rm -f "$gl_source_base/fnmatch.h"

  else

    FNMATCH_H=fnmatch.h

  fi

  AC_SUBST([FNMATCH_H])

  AM_CONDITIONAL([GL_GENERATE_FNMATCH_H], [test -n "$FNMATCH_H"])

])

# Request a POSIX compliant fnmatch function with GNU extensions.

AC_DEFUN([gl_FUNC_FNMATCH_GNU],

[

  m4_divert_text([INIT_PREPARE], [gl_fnmatch_required=GNU])

  AC_REQUIRE([gl_FUNC_FNMATCH_POSIX])

])

AC_DEFUN([gl_PREREQ_FNMATCH],

[

  dnl We must choose a different name for our function, since on ELF systems

  dnl a broken fnmatch() in libc.so would override our fnmatch() if it is

  dnl compiled into a shared library.

  AC_DEFINE_UNQUOTED([fnmatch], [${gl_fnmatch_required_lowercase}_fnmatch],

    [Define to a replacement function name for fnmatch().])

  dnl Prerequisites of lib/fnmatch.c.

  AC_REQUIRE([AC_TYPE_MBSTATE_T])

  AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])

  AC_CHECK_FUNCS_ONCE([btowc isblank iswctype mbsrtowcs mempcpy wmemchr wmemcpy wmempcpy])

  AC_CHECK_HEADERS_ONCE([wctype.h])

])