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/* Copyright (C) 1991 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include "config.h"
#include <errno.h>
#include "fnmatch.h"
#ifdef USE_CWGUSI
#include <sys/errno.h>
#endif
#if !defined (__GNU_LIBRARY__) && !defined (STDC_HEADERS)
# if !defined (errno)
extern int errno;
# endif /* !errno */
#endif
/* Match STRING against the filename pattern PATTERN, returning zero if
it matches, FNM_NOMATCH if not. */
int
fnmatch (pattern, string, flags)
char *pattern;
char *string;
int flags;
{
register char *p = pattern, *n = string;
register char c;
if ((flags & ~__FNM_FLAGS) != 0)
{
errno = EINVAL;
return (-1);
}
while ((c = *p++) != '\0')
{
switch (c)
{
case '?':
if (*n == '\0')
return (FNM_NOMATCH);
else if ((flags & FNM_PATHNAME) && *n == '/')
/* If we are matching a pathname, `?' can never match a `/'. */
return (FNM_NOMATCH);
else if ((flags & FNM_PERIOD) && *n == '.' &&
(n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
/* `?' cannot match a `.' if it is the first character of the
string or if it is the first character following a slash and
we are matching a pathname. */
return (FNM_NOMATCH);
break;
case '\\':
if (!(flags & FNM_NOESCAPE))
{
c = *p++;
if (c == '\0')
return (FNM_NOMATCH);
}
if (*n != c)
return (FNM_NOMATCH);
break;
case '*':
if ((flags & FNM_PERIOD) && *n == '.' &&
(n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
/* `*' cannot match a `.' if it is the first character of the
string or if it is the first character following a slash and
we are matching a pathname. */
return (FNM_NOMATCH);
/* Collapse multiple consecutive, `*' and `?', but make sure that
one character of the string is consumed for each `?'. */
for (c = *p++; c == '?' || c == '*'; c = *p++)
{
if ((flags & FNM_PATHNAME) && *n == '/')
/* A slash does not match a wildcard under FNM_PATHNAME. */
return (FNM_NOMATCH);
else if (c == '?')
{
if (*n == '\0')
return (FNM_NOMATCH);
/* One character of the string is consumed in matching
this ? wildcard, so *??? won't match if there are
fewer than three characters. */
n++;
}
}
if (c == '\0')
return (0);
/* General case, use recursion. */
{
char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
for (--p; *n != '\0'; ++n)
/* Only call fnmatch if the first character indicates a
possible match. */
if ((c == '[' || *n == c1) &&
fnmatch (p, n, flags & ~FNM_PERIOD) == 0)
return (0);
return (FNM_NOMATCH);
}
case '[':
{
/* Nonzero if the sense of the character class is inverted. */
register int not;
if (*n == '\0')
return (FNM_NOMATCH);
/* A character class cannot match a `.' if it is the first
character of the string or if it is the first character
following a slash and we are matching a pathname. */
if ((flags & FNM_PERIOD) && *n == '.' &&
(n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
return (FNM_NOMATCH);
/* POSIX.2 2.8.3.1.2 says: `An expression containing a `[' that
is not preceded by a backslash and is not part of a bracket
expression produces undefined results.' This implementation
treats the `[' as just a character to be matched if there is
not a closing `]'. This code will have to be changed when
POSIX.2 character classes are implemented. */
{
register char *np;
for (np = p; np && *np && *np != ']'; np++)
;
if (np && !*np)
{
if (*n != '[')
return (FNM_NOMATCH);
break;
}
}
not = (*p == '!' || *p == '^');
if (not)
++p;
c = *p++;
for (;;)
{
register char cstart, cend;
/* Initialize cstart and cend in case `-' is the last
character of the pattern. */
cstart = cend = c;
if (!(flags & FNM_NOESCAPE) && c == '\\')
{
if (*p == '\0')
return FNM_NOMATCH;
cstart = cend = *p++;
}
if (c == '\0')
/* [ (unterminated) loses. */
return (FNM_NOMATCH);
c = *p++;
if ((flags & FNM_PATHNAME) && c == '/')
/* [/] can never match. */
return (FNM_NOMATCH);
/* This introduces a range, unless the `-' is the last
character of the class. Find the end of the range
and move past it. */
if (c == '-' && *p != ']')
{
cend = *p++;
if (!(flags & FNM_NOESCAPE) && cend == '\\')
cend = *p++;
if (cend == '\0')
return (FNM_NOMATCH);
c = *p++;
}
if (*n >= cstart && *n <= cend)
goto matched;
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;
}
}
if (not)
return (FNM_NOMATCH);
}
break;
default:
if (c != *n)
return (FNM_NOMATCH);
}
++n;
}
if (*n == '\0')
return (0);
return (FNM_NOMATCH);
}
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