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/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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 3 of the License, or
(at your option) any later version.
Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
*/
static int INTERNAL_GLOB_PATTERN_P PARAMS((const GCHAR *));
/* Return nonzero if PATTERN has any special globbing chars in it.
Compiled twice, once each for single-byte and multibyte characters. */
static int
INTERNAL_GLOB_PATTERN_P (pattern)
const GCHAR *pattern;
{
register const GCHAR *p;
register GCHAR c;
int bopen, bsquote;
p = pattern;
bopen = bsquote = 0;
while ((c = *p++) != L('\0'))
switch (c)
{
case L('?'):
case L('*'):
return 1;
case L('['): /* Only accept an open brace if there is a close */
bopen++; /* brace to match it. Bracket expressions must be */
continue; /* complete, according to Posix.2 */
case L(']'):
if (bopen)
return 1;
continue;
case L('+'): /* extended matching operators */
case L('@'):
case L('!'):
if (*p == L('(')) /*) */
return 1;
continue;
case L('\\'):
/* Don't let the pattern end in a backslash (GMATCH returns no match
if the pattern ends in a backslash anyway), but otherwise note that
we have seen this, since the matching engine uses backslash as an
escape character and it can be removed. We return 2 later if we
have seen only backslash-escaped characters, so interested callers
know they can shortcut and just dequote the pathname. */
if (*p != L('\0'))
{
p++;
bsquote = 1;
continue;
}
else /* (*p == L('\0')) */
return 0;
}
#if 0
return bsquote ? 2 : 0;
#else
return (0);
#endif
}
#undef INTERNAL_GLOB_PATTERN_P
#undef L
#undef INT
#undef CHAR
#undef GCHAR
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