[deliverable/binutils-gdb.git] / gnulib / import / fnmatch.c

/* Copyright (C) 1991-1993, 1996-2007, 2009-2019 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <https://www.gnu.org/licenses/>.  */

#ifndef _LIBC
# include <config.h>
#endif

/* Enable GNU extensions in fnmatch.h.  */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE    1
#endif

#include <fnmatch.h>

#include <alloca.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>

#define WIDE_CHAR_SUPPORT \
  (HAVE_WCTYPE_H && HAVE_BTOWC && HAVE_ISWCTYPE \
   && HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY))

/* For platform which support the ISO C amendment 1 functionality we
   support user defined character classes.  */
#if defined _LIBC || WIDE_CHAR_SUPPORT
# include <wctype.h>
# include <wchar.h>
#endif

/* We need some of the locale data (the collation sequence information)
   but there is no interface to get this information in general.  Therefore
   we support a correct implementation only in glibc.  */
#ifdef _LIBC
# include "../locale/localeinfo.h"
# include "../locale/elem-hash.h"
# include "../locale/coll-lookup.h"
# include <shlib-compat.h>

# define CONCAT(a,b) __CONCAT(a,b)
# define mbsrtowcs __mbsrtowcs
# define fnmatch __fnmatch
extern int fnmatch (const char *pattern, const char *string, int flags);
#endif

#ifndef SIZE_MAX
# define SIZE_MAX ((size_t) -1)
#endif

#include "flexmember.h"

#ifndef FALLTHROUGH
# if __GNUC__ < 7
#  define FALLTHROUGH ((void) 0)
# else
#  define FALLTHROUGH __attribute__ ((__fallthrough__))
# endif
#endif

/* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set.  */
#define NO_LEADING_PERIOD(flags) \
  ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))

/* Comment out all this code if we are using the GNU C Library, and are not
   actually compiling the library itself, and have not detected a bug
   in the library.  This code is part of the GNU C
   Library, but also included in many other GNU distributions.  Compiling
   and linking in this code is a waste when using the GNU C library
   (especially if it is a shared library).  Rather than having every GNU
   program understand 'configure --with-gnu-libc' and omit the object files,
   it is simpler to just do this in the source for each such file.  */

#if defined _LIBC || !defined __GNU_LIBRARY__ || !HAVE_FNMATCH_GNU


# if ! (defined isblank || (HAVE_ISBLANK && HAVE_DECL_ISBLANK))
#  define isblank(c) ((c) == ' ' || (c) == '\t')
# endif

# define STREQ(s1, s2) (strcmp (s1, s2) == 0)

# if defined _LIBC || WIDE_CHAR_SUPPORT
/* The GNU C library provides support for user-defined character classes
   and the functions from ISO C amendment 1.  */
#  ifdef CHARCLASS_NAME_MAX
#   define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
#  else
/* This shouldn't happen but some implementation might still have this
   problem.  Use a reasonable default value.  */
#   define CHAR_CLASS_MAX_LENGTH 256
#  endif

#  ifdef _LIBC
#   define IS_CHAR_CLASS(string) __wctype (string)
#  else
#   define IS_CHAR_CLASS(string) wctype (string)
#  endif

#  ifdef _LIBC
#   define ISWCTYPE(WC, WT)     __iswctype (WC, WT)
#  else
#   define ISWCTYPE(WC, WT)     iswctype (WC, WT)
#  endif

#  if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC
/* In this case we are implementing the multibyte character handling.  */
#   define HANDLE_MULTIBYTE     1
#  endif

# else
#  define CHAR_CLASS_MAX_LENGTH  6 /* Namely, 'xdigit'.  */

#  define IS_CHAR_CLASS(string)                                               \
   (STREQ (string, "alpha") || STREQ (string, "upper")                        \
    || STREQ (string, "lower") || STREQ (string, "digit")                     \
    || STREQ (string, "alnum") || STREQ (string, "xdigit")                    \
    || STREQ (string, "space") || STREQ (string, "print")                     \
    || STREQ (string, "punct") || STREQ (string, "graph")                     \
    || STREQ (string, "cntrl") || STREQ (string, "blank"))
# endif

/* Avoid depending on library functions or files
   whose names are inconsistent.  */

/* Global variable.  */
static int posixly_correct;

# ifndef internal_function
/* Inside GNU libc we mark some function in a special way.  In other
   environments simply ignore the marking.  */
#  define internal_function
# endif

/* Note that this evaluates C many times.  */
# define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
# define CHAR   char
# define UCHAR  unsigned char
# define INT    int
# define FCT    internal_fnmatch
# define EXT    ext_match
# define END    end_pattern
# define L_(CS) CS
# ifdef _LIBC
#  define BTOWC(C)      __btowc (C)
# else
#  define BTOWC(C)      btowc (C)
# endif
# define STRLEN(S) strlen (S)
# define STRCAT(D, S) strcat (D, S)
# ifdef _LIBC
#  define MEMPCPY(D, S, N) __mempcpy (D, S, N)
# else
#  if HAVE_MEMPCPY
#   define MEMPCPY(D, S, N) mempcpy (D, S, N)
#  else
#   define MEMPCPY(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
#  endif
# endif
# define MEMCHR(S, C, N) memchr (S, C, N)
# include "fnmatch_loop.c"


# if HANDLE_MULTIBYTE
#  define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
#  define CHAR  wchar_t
#  define UCHAR wint_t
#  define INT   wint_t
#  define FCT   internal_fnwmatch
#  define EXT   ext_wmatch
#  define END   end_wpattern
#  define L_(CS)        L##CS
#  define BTOWC(C)      (C)
#  ifdef _LIBC
#   define STRLEN(S) __wcslen (S)
#   define STRCAT(D, S) __wcscat (D, S)
#   define MEMPCPY(D, S, N) __wmempcpy (D, S, N)
#  else
#   define STRLEN(S) wcslen (S)
#   define STRCAT(D, S) wcscat (D, S)
#   if HAVE_WMEMPCPY
#    define MEMPCPY(D, S, N) wmempcpy (D, S, N)
#   else
#    define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N))
#   endif
#  endif
#  define MEMCHR(S, C, N) wmemchr (S, C, N)
#  define WIDE_CHAR_VERSION 1

#  undef IS_CHAR_CLASS
/* We have to convert the wide character string in a multibyte string.  But
   we know that the character class names consist of alphanumeric characters
   from the portable character set, and since the wide character encoding
   for a member of the portable character set is the same code point as
   its single-byte encoding, we can use a simplified method to convert the
   string to a multibyte character string.  */
static wctype_t
is_char_class (const wchar_t *wcs)
{
  char s[CHAR_CLASS_MAX_LENGTH + 1];
  char *cp = s;

  do
    {
      /* Test for a printable character from the portable character set.  */
#  ifdef _LIBC
      if (*wcs < 0x20 || *wcs > 0x7e
          || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
        return (wctype_t) 0;
#  else
      switch (*wcs)
        {
        case L' ': case L'!': case L'"': case L'#': case L'%':
        case L'&': case L'\'': case L'(': case L')': case L'*':
        case L'+': case L',': case L'-': case L'.': case L'/':
        case L'0': case L'1': case L'2': case L'3': case L'4':
        case L'5': case L'6': case L'7': case L'8': case L'9':
        case L':': case L';': case L'<': case L'=': case L'>':
        case L'?':
        case L'A': case L'B': case L'C': case L'D': case L'E':
        case L'F': case L'G': case L'H': case L'I': case L'J':
        case L'K': case L'L': case L'M': case L'N': case L'O':
        case L'P': case L'Q': case L'R': case L'S': case L'T':
        case L'U': case L'V': case L'W': case L'X': case L'Y':
        case L'Z':
        case L'[': case L'\\': case L']': case L'^': case L'_':
        case L'a': case L'b': case L'c': case L'd': case L'e':
        case L'f': case L'g': case L'h': case L'i': case L'j':
        case L'k': case L'l': case L'm': case L'n': case L'o':
        case L'p': case L'q': case L'r': case L's': case L't':
        case L'u': case L'v': case L'w': case L'x': case L'y':
        case L'z': case L'{': case L'|': case L'}': case L'~':
          break;
        default:
          return (wctype_t) 0;
        }
#  endif

      /* Avoid overrunning the buffer.  */
      if (cp == s + CHAR_CLASS_MAX_LENGTH)
        return (wctype_t) 0;

      *cp++ = (char) *wcs++;
    }
  while (*wcs != L'\0');

  *cp = '\0';

#  ifdef _LIBC
  return __wctype (s);
#  else
  return wctype (s);
#  endif
}
#  define IS_CHAR_CLASS(string) is_char_class (string)

#  include "fnmatch_loop.c"
# endif


int
fnmatch (const char *pattern, const char *string, int flags)
{
# if HANDLE_MULTIBYTE
#  define ALLOCA_LIMIT 2000
  if (__builtin_expect (MB_CUR_MAX, 1) != 1)
    {
      mbstate_t ps;
      size_t patsize;
      size_t strsize;
      size_t totsize;
      wchar_t *wpattern;
      wchar_t *wstring;
      int res;

      /* Calculate the size needed to convert the strings to
         wide characters.  */
      memset (&ps, '\0', sizeof (ps));
      patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1;
      if (__builtin_expect (patsize != 0, 1))
        {
          assert (mbsinit (&ps));
          strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1;
          if (__builtin_expect (strsize != 0, 1))
            {
              assert (mbsinit (&ps));
              totsize = patsize + strsize;
              if (__builtin_expect (! (patsize <= totsize
                                       && totsize <= SIZE_MAX / sizeof (wchar_t)),
                                    0))
                {
                  errno = ENOMEM;
                  return -1;
                }

              /* Allocate room for the wide characters.  */
              if (__builtin_expect (totsize < ALLOCA_LIMIT, 1))
                wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t));
              else
                {
                  wpattern = malloc (totsize * sizeof (wchar_t));
                  if (__builtin_expect (! wpattern, 0))
                    {
                      errno = ENOMEM;
                      return -1;
                    }
                }
              wstring = wpattern + patsize;

              /* Convert the strings into wide characters.  */
              mbsrtowcs (wpattern, &pattern, patsize, &ps);
              assert (mbsinit (&ps));
              mbsrtowcs (wstring, &string, strsize, &ps);

              res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1,
                                       flags & FNM_PERIOD, flags);

              if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0))
                free (wpattern);
              return res;
            }
        }
    }

# endif /* HANDLE_MULTIBYTE */

  return internal_fnmatch (pattern, string, string + strlen (string),
                           flags & FNM_PERIOD, flags);
}

# ifdef _LIBC
#  undef fnmatch
versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
#  if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
strong_alias (__fnmatch, __fnmatch_old)
compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
#  endif
libc_hidden_ver (__fnmatch, fnmatch)
# endif

#endif  /* _LIBC or not __GNU_LIBRARY__.  */
Commit	Line	Data
c0c3707f	1	/* Copyright (C) 1991-1993, 1996-2007, 2009-2019 Free Software Foundation, Inc.
8690e634 JK	2
	3	This program is free software; you can redistribute it and/or modify
	4	it under the terms of the GNU General Public License as published by
	5	the Free Software Foundation; either version 3, or (at your option)
	6	any later version.
	7
	8	This program is distributed in the hope that it will be useful,
	9	but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	GNU General Public License for more details.
	12
	13	You should have received a copy of the GNU General Public License
c0c3707f	14	along with this program; if not, see <https://www.gnu.org/licenses/>. */
8690e634 JK	15
	16	#ifndef _LIBC
	17	# include <config.h>
	18	#endif
	19
	20	/* Enable GNU extensions in fnmatch.h. */
	21	#ifndef _GNU_SOURCE
	22	# define _GNU_SOURCE 1
	23	#endif
	24
8690e634 JK	25	#include <fnmatch.h>
	26
	27	#include <alloca.h>
	28	#include <assert.h>
	29	#include <ctype.h>
	30	#include <errno.h>
	31	#include <stddef.h>
	32	#include <stdbool.h>
	33	#include <stdlib.h>
	34	#include <string.h>
	35
	36	#define WIDE_CHAR_SUPPORT \
	37	(HAVE_WCTYPE_H && HAVE_BTOWC && HAVE_ISWCTYPE \
	38	&& HAVE_WMEMCHR && (HAVE_WMEMCPY \|\| HAVE_WMEMPCPY))
	39
	40	/* For platform which support the ISO C amendment 1 functionality we
	41	support user defined character classes. */
	42	#if defined _LIBC \|\| WIDE_CHAR_SUPPORT
	43	# include <wctype.h>
	44	# include <wchar.h>
	45	#endif
	46
	47	/* We need some of the locale data (the collation sequence information)
	48	but there is no interface to get this information in general. Therefore
	49	we support a correct implementation only in glibc. */
	50	#ifdef _LIBC
	51	# include "../locale/localeinfo.h"
	52	# include "../locale/elem-hash.h"
	53	# include "../locale/coll-lookup.h"
	54	# include <shlib-compat.h>
	55
	56	# define CONCAT(a,b) __CONCAT(a,b)
	57	# define mbsrtowcs __mbsrtowcs
	58	# define fnmatch __fnmatch
	59	extern int fnmatch (const char pattern, const char string, int flags);
	60	#endif
	61
	62	#ifndef SIZE_MAX
	63	# define SIZE_MAX ((size_t) -1)
	64	#endif
	65
49e4877c PA	66	#include "flexmember.h"
49e4877c PA	67
c0c3707f CB	68	#ifndef FALLTHROUGH
	69	# if __GNUC__ < 7
	70	# define FALLTHROUGH ((void) 0)
	71	# else
	72	# define FALLTHROUGH __attribute__ ((__fallthrough__))
	73	# endif
	74	#endif
	75
8690e634 JK	76	/* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */
	77	#define NO_LEADING_PERIOD(flags) \
	78	((flags & (FNM_FILE_NAME \| FNM_PERIOD)) == (FNM_FILE_NAME \| FNM_PERIOD))
	79
	80	/* Comment out all this code if we are using the GNU C Library, and are not
	81	actually compiling the library itself, and have not detected a bug
	82	in the library. This code is part of the GNU C
	83	Library, but also included in many other GNU distributions. Compiling
	84	and linking in this code is a waste when using the GNU C library
	85	(especially if it is a shared library). Rather than having every GNU
	86	program understand 'configure --with-gnu-libc' and omit the object files,
	87	it is simpler to just do this in the source for each such file. */
	88
	89	#if defined _LIBC \|\| !defined __GNU_LIBRARY__ \|\| !HAVE_FNMATCH_GNU
	90
	91
	92	# if ! (defined isblank \|\| (HAVE_ISBLANK && HAVE_DECL_ISBLANK))
	93	# define isblank(c) ((c) == ' ' \|\| (c) == '\t')
	94	# endif
	95
	96	# define STREQ(s1, s2) (strcmp (s1, s2) == 0)
	97
	98	# if defined _LIBC \|\| WIDE_CHAR_SUPPORT
	99	/* The GNU C library provides support for user-defined character classes
	100	and the functions from ISO C amendment 1. */
	101	# ifdef CHARCLASS_NAME_MAX
	102	# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
	103	# else
	104	/* This shouldn't happen but some implementation might still have this
	105	problem. Use a reasonable default value. */
	106	# define CHAR_CLASS_MAX_LENGTH 256
	107	# endif
	108
	109	# ifdef _LIBC
	110	# define IS_CHAR_CLASS(string) __wctype (string)
	111	# else
	112	# define IS_CHAR_CLASS(string) wctype (string)
	113	# endif
	114
	115	# ifdef _LIBC
	116	# define ISWCTYPE(WC, WT) __iswctype (WC, WT)
	117	# else
	118	# define ISWCTYPE(WC, WT) iswctype (WC, WT)
	119	# endif
	120
	121	# if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) \|\| _LIBC
	122	/* In this case we are implementing the multibyte character handling. */
	123	# define HANDLE_MULTIBYTE 1
	124	# endif
	125
	126	# else
	127	# define CHAR_CLASS_MAX_LENGTH 6 /* Namely, 'xdigit'. */
	128
	129	# define IS_CHAR_CLASS(string) \
	130	(STREQ (string, "alpha") \|\| STREQ (string, "upper") \
	131	\|\| STREQ (string, "lower") \|\| STREQ (string, "digit") \
	132	\|\| STREQ (string, "alnum") \|\| STREQ (string, "xdigit") \
	133	\|\| STREQ (string, "space") \|\| STREQ (string, "print") \
	134	\|\| STREQ (string, "punct") \|\| STREQ (string, "graph") \
	135	\|\| STREQ (string, "cntrl") \|\| STREQ (string, "blank"))
	136	# endif
	137
	138	/* Avoid depending on library functions or files
	139	whose names are inconsistent. */
140
141	/* Global variable. */
142	static int posixly_correct;
143
144	# ifndef internal_function
145	/* Inside GNU libc we mark some function in a special way. In other
146	environments simply ignore the marking. */
147	# define internal_function
148	# endif
149
150	/* Note that this evaluates C many times. */
151	# define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
152	# define CHAR char
153	# define UCHAR unsigned char
154	# define INT int
155	# define FCT internal_fnmatch
156	# define EXT ext_match
157	# define END end_pattern
158	# define L_(CS) CS
159	# ifdef _LIBC
160	# define BTOWC(C) __btowc (C)
161	# else
162	# define BTOWC(C) btowc (C)
163	# endif
164	# define STRLEN(S) strlen (S)
165	# define STRCAT(D, S) strcat (D, S)
166	# ifdef _LIBC
167	# define MEMPCPY(D, S, N) __mempcpy (D, S, N)
168	# else
169	# if HAVE_MEMPCPY
170	# define MEMPCPY(D, S, N) mempcpy (D, S, N)
171	# else
172	# define MEMPCPY(D, S, N) ((void ) ((char ) memcpy (D, S, N) + (N)))
173	# endif
174	# endif
175	# define MEMCHR(S, C, N) memchr (S, C, N)
176	# include "fnmatch_loop.c"
177
178
179	# if HANDLE_MULTIBYTE
180	# define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
181	# define CHAR wchar_t
182	# define UCHAR wint_t
183	# define INT wint_t
184	# define FCT internal_fnwmatch
185	# define EXT ext_wmatch
186	# define END end_wpattern
187	# define L_(CS) L##CS
188	# define BTOWC(C) (C)
189	# ifdef _LIBC
190	# define STRLEN(S) __wcslen (S)
191	# define STRCAT(D, S) __wcscat (D, S)
192	# define MEMPCPY(D, S, N) __wmempcpy (D, S, N)
193	# else
194	# define STRLEN(S) wcslen (S)
195	# define STRCAT(D, S) wcscat (D, S)
196	# if HAVE_WMEMPCPY
197	# define MEMPCPY(D, S, N) wmempcpy (D, S, N)
198	# else
199	# define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N))
200	# endif
201	# endif
202	# define MEMCHR(S, C, N) wmemchr (S, C, N)
203	# define WIDE_CHAR_VERSION 1
204
205	# undef IS_CHAR_CLASS
206	/* We have to convert the wide character string in a multibyte string. But
207	we know that the character class names consist of alphanumeric characters
208	from the portable character set, and since the wide character encoding
209	for a member of the portable character set is the same code point as
210	its single-byte encoding, we can use a simplified method to convert the
211	string to a multibyte character string. */
212	static wctype_t
213	is_char_class (const wchar_t *wcs)
214	{
215	char s[CHAR_CLASS_MAX_LENGTH + 1];
216	char *cp = s;
217
218	do
219	{
220	/* Test for a printable character from the portable character set. */
221	# ifdef _LIBC
222	if (wcs < 0x20 \|\| wcs > 0x7e
223	\|\| wcs == 0x24 \|\| wcs == 0x40 \|\| *wcs == 0x60)
224	return (wctype_t) 0;
225	# else
226	switch (*wcs)
227	{
228	case L' ': case L'!': case L'"': case L'#': case L'%':
229	case L'&': case L'\'': case L'(': case L')': case L'*':
230	case L'+': case L',': case L'-': case L'.': case L'/':
231	case L'0': case L'1': case L'2': case L'3': case L'4':
232	case L'5': case L'6': case L'7': case L'8': case L'9':
233	case L':': case L';': case L'<': case L'=': case L'>':
234	case L'?':
235	case L'A': case L'B': case L'C': case L'D': case L'E':
236	case L'F': case L'G': case L'H': case L'I': case L'J':
237	case L'K': case L'L': case L'M': case L'N': case L'O':
238	case L'P': case L'Q': case L'R': case L'S': case L'T':
239	case L'U': case L'V': case L'W': case L'X': case L'Y':
240	case L'Z':
241	case L'[': case L'\\': case L']': case L'^': case L'_':
242	case L'a': case L'b': case L'c': case L'd': case L'e':
243	case L'f': case L'g': case L'h': case L'i': case L'j':
244	case L'k': case L'l': case L'm': case L'n': case L'o':
245	case L'p': case L'q': case L'r': case L's': case L't':
246	case L'u': case L'v': case L'w': case L'x': case L'y':
247	case L'z': case L'{': case L'\|': case L'}': case L'~':
248	break;
249	default:
250	return (wctype_t) 0;
251	}
252	# endif
253
254	/* Avoid overrunning the buffer. */
255	if (cp == s + CHAR_CLASS_MAX_LENGTH)
256	return (wctype_t) 0;
257
258	cp++ = (char) wcs++;
259	}
260	while (*wcs != L'\0');
261
262	*cp = '\0';
263
264	# ifdef _LIBC
265	return __wctype (s);
266	# else
267	return wctype (s);
268	# endif
269	}
270	# define IS_CHAR_CLASS(string) is_char_class (string)
271
272	# include "fnmatch_loop.c"
273	# endif
274
275
276	int
277	fnmatch (const char pattern, const char string, int flags)
278	{
279	# if HANDLE_MULTIBYTE
280	# define ALLOCA_LIMIT 2000
281	if (__builtin_expect (MB_CUR_MAX, 1) != 1)
282	{
283	mbstate_t ps;
284	size_t patsize;
285	size_t strsize;
286	size_t totsize;
287	wchar_t *wpattern;
288	wchar_t *wstring;
289	int res;
290
291	/* Calculate the size needed to convert the strings to
292	wide characters. */
293	memset (&ps, '\0', sizeof (ps));
294	patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1;
295	if (__builtin_expect (patsize != 0, 1))
296	{
297	assert (mbsinit (&ps));
298	strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1;
299	if (__builtin_expect (strsize != 0, 1))
300	{
301	assert (mbsinit (&ps));
302	totsize = patsize + strsize;
303	if (__builtin_expect (! (patsize <= totsize
304	&& totsize <= SIZE_MAX / sizeof (wchar_t)),
305	0))
306	{
307	errno = ENOMEM;
308	return -1;
309	}
310
311	/* Allocate room for the wide characters. */
312	if (__builtin_expect (totsize < ALLOCA_LIMIT, 1))
313	wpattern = (wchar_t ) alloca (totsize sizeof (wchar_t));
314	else
315	{
316	wpattern = malloc (totsize * sizeof (wchar_t));
317	if (__builtin_expect (! wpattern, 0))
318	{
319	errno = ENOMEM;
320	return -1;
321	}
322	}
323	wstring = wpattern + patsize;
324
325	/* Convert the strings into wide characters. */
326	mbsrtowcs (wpattern, &pattern, patsize, &ps);
327	assert (mbsinit (&ps));
328	mbsrtowcs (wstring, &string, strsize, &ps);
329
330	res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1,
331	flags & FNM_PERIOD, flags);
332
333	if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0))
334	free (wpattern);
335	return res;
336	}
337	}
338	}
339
340	# endif /* HANDLE_MULTIBYTE */
341
342	return internal_fnmatch (pattern, string, string + strlen (string),
343	flags & FNM_PERIOD, flags);
344	}
345
346	# ifdef _LIBC
347	# undef fnmatch
348	versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
349	# if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
350	strong_alias (__fnmatch, __fnmatch_old)
351	compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
352	# endif
353	libc_hidden_ver (__fnmatch, fnmatch)
354	# endif
355
356	#endif /* _LIBC or not __GNU_LIBRARY__. */