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mirror of https://github.com/moparisthebest/wget synced 2024-07-03 16:38:41 -04:00
wget/src/fnmatch.c
2001-05-27 12:35:15 -07:00

201 lines
4.4 KiB
C

/* Pattern matching (globbing).
Copyright (C) 1991, 1996, 1997 Free Software Foundation, Inc.
This file is part of GNU Wget.
GNU Wget is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GNU Wget 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Wget; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* NOTE: Some Un*xes have their own fnmatch() -- yet, they are
reportedly unreliable and buggy. Thus I chose never to use it;
this version (from GNU Bash) is used unconditionally. */
#include <config.h>
#include <errno.h>
#include "wget.h"
#include "fnmatch.h"
/* Match STRING against the filename pattern PATTERN, returning zero
if it matches, FNM_NOMATCH if not. */
int
fnmatch (const char *pattern, const char *string, int flags)
{
register const 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 == '/')
return (FNM_NOMATCH);
else if ((flags & FNM_PERIOD) && *n == '.' &&
(n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
return (FNM_NOMATCH);
break;
case '\\':
if (!(flags & FNM_NOESCAPE))
c = *p++;
if (*n != c)
return (FNM_NOMATCH);
break;
case '*':
if ((flags & FNM_PERIOD) && *n == '.' &&
(n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
return (FNM_NOMATCH);
for (c = *p++; c == '?' || c == '*'; c = *p++, ++n)
if (((flags & FNM_PATHNAME) && *n == '/') ||
(c == '?' && *n == '\0'))
return (FNM_NOMATCH);
if (c == '\0')
return (0);
{
char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
for (--p; *n != '\0'; ++n)
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);
if ((flags & FNM_PERIOD) && *n == '.' &&
(n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
return (FNM_NOMATCH);
/* Make sure there is a closing `]'. If there isn't,
the `[' is just a character to be matched. */
{
register const char *np;
for (np = p; np && *np && *np != ']'; np++);
if (np && !*np)
{
if (*n != '[')
return (FNM_NOMATCH);
goto next_char;
}
}
not = (*p == '!' || *p == '^');
if (not)
++p;
c = *p++;
while (1)
{
register char cstart = c, cend = c;
if (!(flags & FNM_NOESCAPE) && c == '\\')
cstart = cend = *p++;
if (c == '\0')
/* [ (unterminated) loses. */
return (FNM_NOMATCH);
c = *p++;
if ((flags & FNM_PATHNAME) && c == '/')
/* [/] can never match. */
return (FNM_NOMATCH);
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);
next_char:
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 == '\\')
/* 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);
}
/* Return non-zero if S contains globbing wildcards (`*', `?', `[' or
`]'). */
int
has_wildcards_p (const char *s)
{
for (; *s; s++)
if (*s == '*' || *s == '?' || *s == '[' || *s == ']')
return 1;
return 0;
}