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git/compat/fnmatch/fnmatch.c

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/* Copyright (C) 1991, 92, 93, 96, 97, 98, 99 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 <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 platforms which support the ISO C amendment 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 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
# 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
# ifndef NULL
# define NULL 0
# 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
# 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
/* Match STRING against the filename pattern PATTERN, returning zero if
it matches, nonzero if not. */
static int internal_fnmatch __P ((const char *pattern, const char *string,
int no_leading_period, int flags))
internal_function;
static int
internal_function
internal_fnmatch (pattern, string, no_leading_period, flags)
const char *pattern;
const char *string;
int no_leading_period;
int flags;
{
register const char *p = pattern, *n = string;
register unsigned char c;
/* 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
while ((c = *p++) != '\0')
{
c = FOLD (c);
switch (c)
{
case '?':
if (*n == '\0')
return FNM_NOMATCH;
else if (*n == '/' && (flags & FNM_FILE_NAME))
return FNM_NOMATCH;
else if (*n == '.' && no_leading_period
&& (n == string
|| (n[-1] == '/' && (flags & FNM_FILE_NAME))))
return FNM_NOMATCH;
break;
case '\\':
if (!(flags & FNM_NOESCAPE))
{
c = *p++;
if (c == '\0')
/* Trailing \ loses. */
return FNM_NOMATCH;
c = FOLD (c);
}
if (FOLD ((unsigned char) *n) != c)
return FNM_NOMATCH;
break;
case '*':
if (*n == '.' && no_leading_period
&& (n == string
|| (n[-1] == '/' && (flags & FNM_FILE_NAME))))
return FNM_NOMATCH;
for (c = *p++; c == '?' || c == '*'; c = *p++)
{
if (*n == '/' && (flags & FNM_FILE_NAME))
/* A slash does not match a wildcard under FNM_FILE_NAME. */
return FNM_NOMATCH;
else if (c == '?')
{
/* A ? needs to match one character. */
if (*n == '\0')
/* There isn't another character; no match. */
return FNM_NOMATCH;
else
/* One character of the string is consumed in matching
this ? wildcard, so *??? won't match if there are
less than three characters. */
++n;
}
}
if (c == '\0')
/* The wildcard(s) is/are the last element of the pattern.
If the name is a file name and contains another slash
this does mean it cannot match. */
return ((flags & FNM_FILE_NAME) && strchr (n, '/') != NULL
? FNM_NOMATCH : 0);
else
{
const char *endp;
endp = __strchrnul (n, (flags & FNM_FILE_NAME) ? '/' : '\0');
if (c == '[')
{
int flags2 = ((flags & FNM_FILE_NAME)
? flags : (flags & ~FNM_PERIOD));
for (--p; n < endp; ++n)
if (internal_fnmatch (p, n,
(no_leading_period
&& (n == string
|| (n[-1] == '/'
&& (flags
& FNM_FILE_NAME)))),
flags2)
== 0)
return 0;
}
else if (c == '/' && (flags & FNM_FILE_NAME))
{
while (*n != '\0' && *n != '/')
++n;
if (*n == '/'
&& (internal_fnmatch (p, n + 1, flags & FNM_PERIOD,
flags) == 0))
return 0;
}
else
{
int flags2 = ((flags & FNM_FILE_NAME)
? flags : (flags & ~FNM_PERIOD));
if (c == '\\' && !(flags & FNM_NOESCAPE))
c = *p;
c = FOLD (c);
for (--p; n < endp; ++n)
if (FOLD ((unsigned char) *n) == c
&& (internal_fnmatch (p, n,
(no_leading_period
&& (n == string
|| (n[-1] == '/'
&& (flags
& FNM_FILE_NAME)))),
flags2) == 0))
return 0;
}
}
/* If we come here no match is possible with the wildcard. */
return FNM_NOMATCH;
case '[':
{
/* Nonzero if the sense of the character class is inverted. */
static int posixly_correct;
register int not;
char cold;
if (posixly_correct == 0)
posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1;
if (*n == '\0')
return FNM_NOMATCH;
if (*n == '.' && no_leading_period && (n == string
|| (n[-1] == '/'
&& (flags
& FNM_FILE_NAME))))
return FNM_NOMATCH;
if (*n == '/' && (flags & FNM_FILE_NAME))
/* `/' cannot be matched. */
return FNM_NOMATCH;
not = (*p == '!' || (posixly_correct < 0 && *p == '^'));
if (not)
++p;
c = *p++;
for (;;)
{
unsigned char fn = FOLD ((unsigned char) *n);
if (!(flags & FNM_NOESCAPE) && c == '\\')
{
if (*p == '\0')
return FNM_NOMATCH;
c = FOLD ((unsigned char) *p);
++p;
if (c == fn)
goto matched;
}
else if (c == '[' && *p == ':')
{
/* Leave room for the null. */
char str[CHAR_CLASS_MAX_LENGTH + 1];
size_t c1 = 0;
# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
wctype_t wt;
# endif
const char *startp = p;
for (;;)
{
if (c1 > CHAR_CLASS_MAX_LENGTH)
/* The name is too long and therefore the pattern
is ill-formed. */
return FNM_NOMATCH;
c = *++p;
if (c == ':' && p[1] == ']')
{
p += 2;
break;
}
if (c < 'a' || c >= 'z')
{
/* This cannot possibly be a character class name.
Match it as a normal range. */
p = startp;
c = '[';
goto normal_bracket;
}
str[c1++] = c;
}
str[c1] = '\0';
# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
wt = IS_CHAR_CLASS (str);
if (wt == 0)
/* Invalid character class name. */
return FNM_NOMATCH;
if (__iswctype (__btowc ((unsigned char) *n), wt))
goto matched;
# else
if ((STREQ (str, "alnum") && ISALNUM ((unsigned char) *n))
|| (STREQ (str, "alpha") && ISALPHA ((unsigned char) *n))
|| (STREQ (str, "blank") && ISBLANK ((unsigned char) *n))
|| (STREQ (str, "cntrl") && ISCNTRL ((unsigned char) *n))
|| (STREQ (str, "digit") && ISDIGIT ((unsigned char) *n))
|| (STREQ (str, "graph") && ISGRAPH ((unsigned char) *n))
|| (STREQ (str, "lower") && ISLOWER ((unsigned char) *n))
|| (STREQ (str, "print") && ISPRINT ((unsigned char) *n))
|| (STREQ (str, "punct") && ISPUNCT ((unsigned char) *n))
|| (STREQ (str, "space") && ISSPACE ((unsigned char) *n))
|| (STREQ (str, "upper") && ISUPPER ((unsigned char) *n))
|| (STREQ (str, "xdigit") && ISXDIGIT ((unsigned char) *n)))
goto matched;
# endif
}
else if (c == '\0')
/* [ (unterminated) loses. */
return FNM_NOMATCH;
else
{
normal_bracket:
if (FOLD (c) == fn)
goto matched;
cold = c;
c = *p++;
if (c == '-' && *p != ']')
{
/* It is a range. */
unsigned char cend = *p++;
if (!(flags & FNM_NOESCAPE) && cend == '\\')
cend = *p++;
if (cend == '\0')
return FNM_NOMATCH;
if (cold <= fn && fn <= FOLD (cend))
goto matched;
c = *p++;
}
}
if (c == ']')
break;
}
if (!not)
return FNM_NOMATCH;
break;
matched:
/* Skip the rest of the [...] that already matched. */
while (c != ']')
{
if (c == '\0')
/* [... (unterminated) loses. */
return FNM_NOMATCH;
c = *p++;
if (!(flags & FNM_NOESCAPE) && c == '\\')
{
if (*p == '\0')
return FNM_NOMATCH;
/* XXX 1003.2d11 is unclear if this is right. */
++p;
}
else if (c == '[' && *p == ':')
{
do
if (*++p == '\0')
return FNM_NOMATCH;
while (*p != ':' || p[1] == ']');
p += 2;
c = *p;
}
}
if (not)
return FNM_NOMATCH;
}
break;
default:
if (c != FOLD ((unsigned char) *n))
return FNM_NOMATCH;
}
++n;
}
if (*n == '\0')
return 0;
if ((flags & FNM_LEADING_DIR) && *n == '/')
/* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */
return 0;
return FNM_NOMATCH;
# undef FOLD
}
int
fnmatch (pattern, string, flags)
const char *pattern;
const char *string;
int flags;
{
return internal_fnmatch (pattern, string, flags & FNM_PERIOD, flags);
}
#endif /* _LIBC or not __GNU_LIBRARY__. */