glibc/posix/fnmatch.c

315 lines
8.9 KiB
C

/* Copyright (C) 1991-1993, 1996-1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
/* Enable GNU extensions in fnmatch.h. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif
#include <assert.h>
#include <errno.h>
#include <fnmatch.h>
#include <ctype.h>
#if HAVE_STRING_H || defined _LIBC
# include <string.h>
#else
# include <strings.h>
#endif
#if defined STDC_HEADERS || defined _LIBC
# include <stdlib.h>
#endif
/* For platform which support the ISO C amendement 1 functionality we
support user defined character classes. */
#if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
/* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
# include <wchar.h>
# include <wctype.h>
#endif
/* Comment out all this code if we are using the GNU C Library, and are not
actually compiling the library itself. 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__
# if defined STDC_HEADERS || !defined isascii
# define ISASCII(c) 1
# else
# define ISASCII(c) isascii(c)
# endif
# ifdef isblank
# define ISBLANK(c) (ISASCII (c) && isblank (c))
# else
# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
# endif
# ifdef isgraph
# define ISGRAPH(c) (ISASCII (c) && isgraph (c))
# else
# define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
# endif
# define ISPRINT(c) (ISASCII (c) && isprint (c))
# define ISDIGIT(c) (ISASCII (c) && isdigit (c))
# define ISALNUM(c) (ISASCII (c) && isalnum (c))
# define ISALPHA(c) (ISASCII (c) && isalpha (c))
# define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
# define ISLOWER(c) (ISASCII (c) && islower (c))
# define ISPUNCT(c) (ISASCII (c) && ispunct (c))
# define ISSPACE(c) (ISASCII (c) && isspace (c))
# define ISUPPER(c) (ISASCII (c) && isupper (c))
# define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
# define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
/* The GNU C library provides support for user-defined character classes
and the functions from ISO C amendement 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. */
# if !defined _LIBC && !defined getenv
extern char *getenv ();
# endif
# ifndef errno
extern int errno;
# endif
/* This function doesn't exist on most systems. */
# if !defined HAVE___STRCHRNUL && !defined _LIBC
static char *
__strchrnul (s, c)
const char *s;
int c;
{
char *result = strchr (s, c);
if (result == NULL)
result = strchr (s, '\0');
return result;
}
# endif
# if HANDLE_MULTIBYTE && !defined HAVE___STRCHRNUL && !defined _LIBC
static wchar_t *
__wcschrnul (s, c)
const wchar_t *s;
wint_t c;
{
wchar_t *result = wcschr (s, c);
if (result == NULL)
result = wcschr (s, '\0');
return result;
}
# endif
# 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. */
# ifdef _LIBC
# define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
# else
# define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))
# endif
# define CHAR char
# define UCHAR unsigned char
# define FCT internal_fnmatch
# define L(CS) CS
# ifdef _LIBC
# define BTOWC(C) __btowc (C)
# else
# define BTOWC(C) btowc (C)
# endif
# define STRCHR(S, C) strchr (S, C)
# define STRCHRNUL(S, C) __strchrnul (S, C)
# define STRCOLL(S1, S2) strcoll (S1, S2)
# include "fnmatch_loop.c"
# if HANDLE_MULTIBYTE
/* Note that this evaluates C many times. */
# ifdef _LIBC
# define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
# else
# define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? towlower (c) : (c))
# endif
# define CHAR wchar_t
# define UCHAR wint_t
# define FCT internal_fnwmatch
# define L(CS) L##CS
# define BTOWC(C) (C)
# define STRCHR(S, C) wcschr (S, C)
# define STRCHRNUL(S, C) __wcschrnul (S, C)
# define STRCOLL(S1, S2) wcscoll (S1, S2)
# undef IS_CHAR_CLASS
# ifdef _LIBC
/* We have to convert the wide character string in a multibyte string. But
we know that the character class names are ASCII strings and since the
internal wide character encoding is UCS4 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
{
if (*wcs < 0x20 || *wcs >= 0x7f)
return 0;
*cp++ = (char) *wcs;
}
while (*wcs++ != L'\0');
return __wctype (s);
}
# else
/* Since we cannot assume anything about the internal encoding we have to
convert the string back to multibyte representation the hard way. */
static wctype_t
is_char_class (const wchar_t *wcs)
{
mbstate_t ps;
const wchar_t *pwc;
char *s;
size_t n;
memset (&ps, '\0', sizeof (ps));
pwc = wcs;
n = wcsrtombs (NULL, &pwc, 0, &ps);
if (n == (size_t) -1)
/* Something went wrong. */
return 0;
s = alloca (n + 1);
assert (mbsinit (&ps));
pwc = wcs;
(void) wcsrtombs (s, &pwc, n + 1, &ps);
return wctype (s);
}
# endif
# define IS_CHAR_CLASS(string) is_char_class (string)
# include "fnmatch_loop.c"
# endif
int
fnmatch (pattern, string, flags)
const char *pattern;
const char *string;
int flags;
{
# if HANDLE_MULTIBYTE
mbstate_t ps;
size_t n;
wchar_t *wpattern;
wchar_t *wstring;
if (MB_CUR_MAX == 1)
/* This is an optimization for 8-bit character set. */
return internal_fnmatch (pattern, string, flags & FNM_PERIOD, flags);
/* Convert the strings into wide characters. */
memset (&ps, '\0', sizeof (ps));
n = mbsrtowcs (NULL, &pattern, 0, &ps);
if (n == (size_t) -1)
/* Something wrong.
XXX Do we have to set `errno' to something which mbsrtows hasn't
already done? */
return -1;
wpattern = (wchar_t *) alloca ((n + 1) * sizeof (wchar_t));
assert (mbsinit (&ps));
(void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);
assert (mbsinit (&ps));
n = mbsrtowcs (NULL, &string, 0, &ps);
if (n == (size_t) -1)
/* Something wrong.
XXX Do we have to set `errno' to something which mbsrtows hasn't
already done? */
return -1;
wstring = (wchar_t *) alloca ((n + 1) * sizeof (wchar_t));
assert (mbsinit (&ps));
(void) mbsrtowcs (wstring, &string, n + 1, &ps);
return internal_fnwmatch (wpattern, wstring, flags & FNM_PERIOD, flags);
# else
return internal_fnmatch (pattern, string, flags & FNM_PERIOD, flags);
# endif /* mbstate_t and mbsrtowcs or _LIBC. */
}
#endif /* _LIBC or not __GNU_LIBRARY__. */