mirror of https://gitee.com/openkylin/wget.git
357 lines
11 KiB
C
357 lines
11 KiB
C
/* Copyright (C) 1991-1993, 1996-2007, 2009-2019 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>. */
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#ifndef _LIBC
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# include <config.h>
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#endif
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/* Enable GNU extensions in fnmatch.h. */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE 1
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#endif
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#include <fnmatch.h>
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#include <alloca.h>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#define WIDE_CHAR_SUPPORT \
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(HAVE_WCTYPE_H && HAVE_BTOWC && HAVE_ISWCTYPE \
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&& HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY))
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/* For platform which support the ISO C amendment 1 functionality we
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support user defined character classes. */
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#if defined _LIBC || WIDE_CHAR_SUPPORT
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# include <wctype.h>
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# include <wchar.h>
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#endif
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/* We need some of the locale data (the collation sequence information)
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but there is no interface to get this information in general. Therefore
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we support a correct implementation only in glibc. */
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#ifdef _LIBC
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# include "../locale/localeinfo.h"
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# include "../locale/elem-hash.h"
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# include "../locale/coll-lookup.h"
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# include <shlib-compat.h>
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# define CONCAT(a,b) __CONCAT(a,b)
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# define mbsrtowcs __mbsrtowcs
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# define fnmatch __fnmatch
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extern int fnmatch (const char *pattern, const char *string, int flags);
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#endif
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#ifndef SIZE_MAX
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# define SIZE_MAX ((size_t) -1)
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#endif
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#include "flexmember.h"
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#ifndef FALLTHROUGH
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# if __GNUC__ < 7
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# define FALLTHROUGH ((void) 0)
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# else
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# define FALLTHROUGH __attribute__ ((__fallthrough__))
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# endif
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#endif
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/* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */
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#define NO_LEADING_PERIOD(flags) \
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((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))
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/* Comment out all this code if we are using the GNU C Library, and are not
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actually compiling the library itself, and have not detected a bug
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in the library. This code is part of the GNU C
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Library, but also included in many other GNU distributions. Compiling
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and linking in this code is a waste when using the GNU C library
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(especially if it is a shared library). Rather than having every GNU
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program understand 'configure --with-gnu-libc' and omit the object files,
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it is simpler to just do this in the source for each such file. */
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#if defined _LIBC || !defined __GNU_LIBRARY__ || !HAVE_FNMATCH_GNU
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# if ! (defined isblank || (HAVE_ISBLANK && HAVE_DECL_ISBLANK))
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# define isblank(c) ((c) == ' ' || (c) == '\t')
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# endif
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# define STREQ(s1, s2) (strcmp (s1, s2) == 0)
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# if defined _LIBC || WIDE_CHAR_SUPPORT
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/* The GNU C library provides support for user-defined character classes
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and the functions from ISO C amendment 1. */
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# ifdef CHARCLASS_NAME_MAX
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# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
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# else
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/* This shouldn't happen but some implementation might still have this
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problem. Use a reasonable default value. */
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# define CHAR_CLASS_MAX_LENGTH 256
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# endif
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# ifdef _LIBC
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# define IS_CHAR_CLASS(string) __wctype (string)
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# else
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# define IS_CHAR_CLASS(string) wctype (string)
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# endif
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# ifdef _LIBC
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# define ISWCTYPE(WC, WT) __iswctype (WC, WT)
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# else
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# define ISWCTYPE(WC, WT) iswctype (WC, WT)
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# endif
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# if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC
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/* In this case we are implementing the multibyte character handling. */
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# define HANDLE_MULTIBYTE 1
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# endif
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# else
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# define CHAR_CLASS_MAX_LENGTH 6 /* Namely, 'xdigit'. */
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# define IS_CHAR_CLASS(string) \
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(STREQ (string, "alpha") || STREQ (string, "upper") \
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|| STREQ (string, "lower") || STREQ (string, "digit") \
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|| STREQ (string, "alnum") || STREQ (string, "xdigit") \
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|| STREQ (string, "space") || STREQ (string, "print") \
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|| STREQ (string, "punct") || STREQ (string, "graph") \
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|| STREQ (string, "cntrl") || STREQ (string, "blank"))
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# endif
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/* Avoid depending on library functions or files
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whose names are inconsistent. */
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/* Global variable. */
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static int posixly_correct;
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# ifndef internal_function
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/* Inside GNU libc we mark some function in a special way. In other
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environments simply ignore the marking. */
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# define internal_function
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# endif
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/* Note that this evaluates C many times. */
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# define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
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# define CHAR char
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# define UCHAR unsigned char
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# define INT int
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# define FCT internal_fnmatch
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# define EXT ext_match
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# define END end_pattern
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# define L_(CS) CS
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# ifdef _LIBC
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# define BTOWC(C) __btowc (C)
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# else
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# define BTOWC(C) btowc (C)
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# endif
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# define STRLEN(S) strlen (S)
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# define STRCAT(D, S) strcat (D, S)
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# ifdef _LIBC
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# define MEMPCPY(D, S, N) __mempcpy (D, S, N)
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# else
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# if HAVE_MEMPCPY
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# define MEMPCPY(D, S, N) mempcpy (D, S, N)
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# else
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# define MEMPCPY(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
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# endif
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# endif
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# define MEMCHR(S, C, N) memchr (S, C, N)
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# include "fnmatch_loop.c"
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# if HANDLE_MULTIBYTE
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# define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
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# define CHAR wchar_t
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# define UCHAR wint_t
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# define INT wint_t
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# define FCT internal_fnwmatch
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# define EXT ext_wmatch
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# define END end_wpattern
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# define L_(CS) L##CS
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# define BTOWC(C) (C)
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# ifdef _LIBC
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# define STRLEN(S) __wcslen (S)
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# define STRCAT(D, S) __wcscat (D, S)
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# define MEMPCPY(D, S, N) __wmempcpy (D, S, N)
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# else
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# define STRLEN(S) wcslen (S)
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# define STRCAT(D, S) wcscat (D, S)
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# if HAVE_WMEMPCPY
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# define MEMPCPY(D, S, N) wmempcpy (D, S, N)
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# else
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# define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N))
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# endif
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# endif
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# define MEMCHR(S, C, N) wmemchr (S, C, N)
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# define WIDE_CHAR_VERSION 1
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# undef IS_CHAR_CLASS
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/* We have to convert the wide character string in a multibyte string. But
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we know that the character class names consist of alphanumeric characters
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from the portable character set, and since the wide character encoding
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for a member of the portable character set is the same code point as
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its single-byte encoding, we can use a simplified method to convert the
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string to a multibyte character string. */
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static wctype_t
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is_char_class (const wchar_t *wcs)
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{
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char s[CHAR_CLASS_MAX_LENGTH + 1];
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char *cp = s;
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do
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{
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/* Test for a printable character from the portable character set. */
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# ifdef _LIBC
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if (*wcs < 0x20 || *wcs > 0x7e
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|| *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
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return (wctype_t) 0;
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# else
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switch (*wcs)
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{
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case L' ': case L'!': case L'"': case L'#': case L'%':
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case L'&': case L'\'': case L'(': case L')': case L'*':
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case L'+': case L',': case L'-': case L'.': case L'/':
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case L'0': case L'1': case L'2': case L'3': case L'4':
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case L'5': case L'6': case L'7': case L'8': case L'9':
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case L':': case L';': case L'<': case L'=': case L'>':
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case L'?':
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case L'A': case L'B': case L'C': case L'D': case L'E':
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case L'F': case L'G': case L'H': case L'I': case L'J':
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case L'K': case L'L': case L'M': case L'N': case L'O':
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case L'P': case L'Q': case L'R': case L'S': case L'T':
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case L'U': case L'V': case L'W': case L'X': case L'Y':
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case L'Z':
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case L'[': case L'\\': case L']': case L'^': case L'_':
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case L'a': case L'b': case L'c': case L'd': case L'e':
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case L'f': case L'g': case L'h': case L'i': case L'j':
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case L'k': case L'l': case L'm': case L'n': case L'o':
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case L'p': case L'q': case L'r': case L's': case L't':
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case L'u': case L'v': case L'w': case L'x': case L'y':
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case L'z': case L'{': case L'|': case L'}': case L'~':
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break;
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default:
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return (wctype_t) 0;
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}
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# endif
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/* Avoid overrunning the buffer. */
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if (cp == s + CHAR_CLASS_MAX_LENGTH)
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return (wctype_t) 0;
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*cp++ = (char) *wcs++;
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}
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while (*wcs != L'\0');
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*cp = '\0';
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# ifdef _LIBC
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return __wctype (s);
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# else
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return wctype (s);
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# endif
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}
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# define IS_CHAR_CLASS(string) is_char_class (string)
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# include "fnmatch_loop.c"
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# endif
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int
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fnmatch (const char *pattern, const char *string, int flags)
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{
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# if HANDLE_MULTIBYTE
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# define ALLOCA_LIMIT 2000
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if (__builtin_expect (MB_CUR_MAX, 1) != 1)
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{
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mbstate_t ps;
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size_t patsize;
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size_t strsize;
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size_t totsize;
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wchar_t *wpattern;
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wchar_t *wstring;
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int res;
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/* Calculate the size needed to convert the strings to
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wide characters. */
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memset (&ps, '\0', sizeof (ps));
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patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1;
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if (__builtin_expect (patsize != 0, 1))
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{
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assert (mbsinit (&ps));
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strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1;
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if (__builtin_expect (strsize != 0, 1))
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{
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assert (mbsinit (&ps));
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totsize = patsize + strsize;
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if (__builtin_expect (! (patsize <= totsize
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&& totsize <= SIZE_MAX / sizeof (wchar_t)),
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0))
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{
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errno = ENOMEM;
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return -1;
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}
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/* Allocate room for the wide characters. */
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if (__builtin_expect (totsize < ALLOCA_LIMIT, 1))
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wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t));
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else
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{
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wpattern = malloc (totsize * sizeof (wchar_t));
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if (__builtin_expect (! wpattern, 0))
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{
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errno = ENOMEM;
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return -1;
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}
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}
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wstring = wpattern + patsize;
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/* Convert the strings into wide characters. */
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mbsrtowcs (wpattern, &pattern, patsize, &ps);
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assert (mbsinit (&ps));
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mbsrtowcs (wstring, &string, strsize, &ps);
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res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1,
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flags & FNM_PERIOD, flags);
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if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0))
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free (wpattern);
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return res;
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}
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}
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}
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# endif /* HANDLE_MULTIBYTE */
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return internal_fnmatch (pattern, string, string + strlen (string),
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flags & FNM_PERIOD, flags);
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}
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# ifdef _LIBC
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# undef fnmatch
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versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
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# if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
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strong_alias (__fnmatch, __fnmatch_old)
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compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
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# endif
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libc_hidden_ver (__fnmatch, fnmatch)
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# endif
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#endif /* _LIBC or not __GNU_LIBRARY__. */
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