/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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 of the License, or (at your option) any later version.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _LIBC
# include <libc-config.h>
#endif
/* Enable GNU extensions in fnmatch.h. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif
#include <fnmatch.h>
#include <assert.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#if defined _LIBC || HAVE_ALLOCA
# include <alloca.h>
#endif
#include <wchar.h>
#include <wctype.h>
#include <stddef.h>
#include <stdbool.h>
/* 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/coll-lookup.h"
# include <shlib-compat.h>
# define CONCAT(a,b) __CONCAT(a,b)
# define btowc __btowc
# define iswctype __iswctype
# define mbsrtowcs __mbsrtowcs
# define mempcpy __mempcpy
# define strnlen __strnlen
# define towlower __towlower
# define wcscat __wcscat
# define wcslen __wcslen
# define wctype __wctype
# define wmemchr __wmemchr
# define wmempcpy __wmempcpy
# define fnmatch __fnmatch
extern int fnmatch (const char *pattern, const char *string, int flags);
#endif
#ifdef _LIBC
# if __GNUC__ < 7
# define FALLTHROUGH ((void) 0)
# else
# define FALLTHROUGH __attribute__ ((__fallthrough__))
# endif
#else
# include "attribute.h"
#endif
#include <intprops.h>
#include <flexmember.h>
/* 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))
#ifndef _LIBC
# if HAVE_ALLOCA
/* The OS usually guarantees only one guard page at the bottom of the stack,
and a page size can be as small as 4096 bytes. So we cannot safely
allocate anything larger than 4096 bytes. Also care for the possibility
of a few compiler-allocated temporary stack slots. */
# define __libc_use_alloca(n) ((n) < 4032)
# else
/* Just use malloc. */
# define __libc_use_alloca(n) false
# undef alloca
# define alloca(n) malloc (n)
# endif
# define alloca_account(size, avar) ((avar) += (size), alloca (size))
#endif
/* Provide support for user-defined character classes, based on the functions
from ISO C 90 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
#define IS_CHAR_CLASS(string) wctype (string)
/* Avoid depending on library functions or files
whose names are inconsistent. */
/* Global variable. */
static int posixly_correct;
/* 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 STRUCT fnmatch_struct
#define L_(CS) CS
#define BTOWC(C) btowc (C)
#define STRLEN(S) strlen (S)
#define STRCAT(D, S) strcat (D, S)
#define MEMPCPY(D, S, N) mempcpy (D, S, N)
#define MEMCHR(S, C, N) memchr (S, C, N)
#define WIDE_CHAR_VERSION 0
#ifdef _LIBC
# include <locale/weight.h>
# define FINDIDX findidx
#endif
#include "fnmatch_loop.c"
#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)
#define STRLEN(S) wcslen (S)
#define STRCAT(D, S) wcscat (D, S)
#define MEMPCPY(D, S, N) wmempcpy (D, S, N)
#define MEMCHR(S, C, N) wmemchr (S, C, N)
#define WIDE_CHAR_VERSION 1
#ifdef _LIBC
/* Change the name the header defines so it doesn't conflict with
the <locale/weight.h> version included above. */
# define findidx findidxwc
# include <locale/weightwc.h>
# undef findidx
# define FINDIDX findidxwc
#endif
#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';
return wctype (s);
}
#define IS_CHAR_CLASS(string) is_char_class (string)
#include "fnmatch_loop.c"
int
fnmatch (const char *pattern, const char *string, int flags)
{
if (__glibc_unlikely (MB_CUR_MAX != 1))
{
mbstate_t ps;
size_t n;
const char *p;
wchar_t *wpattern_malloc = NULL;
wchar_t *wpattern;
wchar_t *wstring_malloc = NULL;
wchar_t *wstring;
size_t alloca_used = 0;
/* Convert the strings into wide characters. */
memset (&ps, '\0', sizeof (ps));
p = pattern;
n = strnlen (pattern, 1024);
if (__glibc_likely (n < 1024))
{
wpattern = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
alloca_used);
n = mbsrtowcs (wpattern, &p, n + 1, &ps);
if (__glibc_unlikely (n == (size_t) -1))
/* Something wrong.
XXX Do we have to set 'errno' to something which mbsrtows hasn't
already done? */
return -1;
if (p)
{
memset (&ps, '\0', sizeof (ps));
goto prepare_wpattern;
}
}
else
{
prepare_wpattern:
n = mbsrtowcs (NULL, &pattern, 0, &ps);
if (__glibc_unlikely (n == (size_t) -1))
/* Something wrong.
XXX Do we have to set 'errno' to something which mbsrtows hasn't
already done? */
return -1;
if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
{
__set_errno (ENOMEM);
return -2;
}
wpattern_malloc = wpattern
= (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
assert (mbsinit (&ps));
if (wpattern == NULL)
return -2;
(void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);
}
assert (mbsinit (&ps));
n = strnlen (string, 1024);
p = string;
if (__glibc_likely (n < 1024))
{
wstring = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
alloca_used);
n = mbsrtowcs (wstring, &p, n + 1, &ps);
if (__glibc_unlikely (n == (size_t) -1))
{
/* Something wrong.
XXX Do we have to set 'errno' to something which
mbsrtows hasn't already done? */
free_return:
free (wpattern_malloc);
return -1;
}
if (p)
{
memset (&ps, '\0', sizeof (ps));
goto prepare_wstring;
}
}
else
{
prepare_wstring:
n = mbsrtowcs (NULL, &string, 0, &ps);
if (__glibc_unlikely (n == (size_t) -1))
/* Something wrong.
XXX Do we have to set 'errno' to something which mbsrtows hasn't
already done? */
goto free_return;
if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
{
free (wpattern_malloc);
__set_errno (ENOMEM);
return -2;
}
wstring_malloc = wstring
= (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
if (wstring == NULL)
{
free (wpattern_malloc);
return -2;
}
assert (mbsinit (&ps));
(void) mbsrtowcs (wstring, &string, n + 1, &ps);
}
int res = internal_fnwmatch (wpattern, wstring, wstring + n,
flags & FNM_PERIOD, flags, NULL,
alloca_used);
free (wstring_malloc);
free (wpattern_malloc);
return res;
}
return internal_fnmatch (pattern, string, string + strlen (string),
flags & FNM_PERIOD, flags, NULL, 0);
}
#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)