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Diffstat (limited to 'lib/fnmatch.c')
| -rw-r--r-- | lib/fnmatch.c | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/lib/fnmatch.c b/lib/fnmatch.c new file mode 100644 index 0000000..b33a127 --- /dev/null +++ b/lib/fnmatch.c @@ -0,0 +1,361 @@ +/* Copyright (C) 1991-2022 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser 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 __attribute__ ((__fallthrough__)) +# else +# define FALLTHROUGH ((void) 0) +# endif +#else +# include "attribute.h" +#endif + +#include <intprops.h> +#include <flexmember.h> + +#ifdef _LIBC +typedef ptrdiff_t idx_t; +#else +# include "idx.h" +#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)) + +#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) |