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/* Copyright (C) 1991-2017 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/>.
*/
#if EXTENDED_GLOB
int
EXTGLOB_PATTERN_P (pat)
const CHAR *pat;
{
switch (pat[0])
{
case L('*'):
case L('+'):
case L('!'):
case L('@'):
case L('?'):
return (pat[1] == L('(')); /* ) */
default:
return 0;
}
return 0;
}
#endif
/* Return 1 of the first character of STRING could match the first
character of pattern PAT. Compiled to both single and wiide character
versions. FLAGS is a subset of strmatch flags; used to do case-insensitive
matching for now. */
int
MATCH_PATTERN_CHAR (pat, string, flags)
CHAR *pat, *string;
int flags;
{
CHAR c;
if (*string == 0)
return (*pat == L('*')); /* XXX - allow only * to match empty string */
switch (c = *pat++)
{
default:
return (FOLD(*string) == FOLD(c));
case L('\\'):
return (FOLD(*string) == FOLD(*pat));
case L('?'):
return (*pat == L('(') ? 1 : (*string != L'\0'));
case L('*'):
return (1);
case L('+'):
case L('!'):
case L('@'):
return (*pat == L('(') ? 1 : (FOLD(*string) == FOLD(c)));
case L('['):
return (*string != L('\0'));
}
}
int
MATCHLEN (pat, max)
CHAR *pat;
size_t max;
{
CHAR c;
int matlen, bracklen, t, in_cclass, in_collsym, in_equiv;
if (*pat == 0)
return (0);
matlen = in_cclass = in_collsym = in_equiv = 0;
while (c = *pat++)
{
switch (c)
{
default:
matlen++;
break;
case L('\\'):
if (*pat == 0)
return ++matlen;
else
{
matlen++;
pat++;
}
break;
case L('?'):
if (*pat == LPAREN)
return (matlen = -1); /* XXX for now */
else
matlen++;
break;
case L('*'):
return (matlen = -1);
case L('+'):
case L('!'):
case L('@'):
if (*pat == LPAREN)
return (matlen = -1); /* XXX for now */
else
matlen++;
break;
case L('['):
/* scan for ending `]', skipping over embedded [:...:] */
bracklen = 1;
c = *pat++;
do
{
if (c == 0)
{
pat--; /* back up to NUL */
matlen += bracklen;
goto bad_bracket;
}
else if (c == L('\\'))
{
/* *pat == backslash-escaped character */
bracklen++;
/* If the backslash or backslash-escape ends the string,
bail. The ++pat skips over the backslash escape */
if (*pat == 0 || *++pat == 0)
{
matlen += bracklen;
goto bad_bracket;
}
}
else if (c == L('[') && *pat == L(':')) /* character class */
{
pat++;
bracklen++;
in_cclass = 1;
}
else if (in_cclass && c == L(':') && *pat == L(']'))
{
pat++;
bracklen++;
in_cclass = 0;
}
else if (c == L('[') && *pat == L('.')) /* collating symbol */
{
pat++;
bracklen++;
if (*pat == L(']')) /* right bracket can appear as collating symbol */
{
pat++;
bracklen++;
}
in_collsym = 1;
}
else if (in_collsym && c == L('.') && *pat == L(']'))
{
pat++;
bracklen++;
in_collsym = 0;
}
else if (c == L('[') && *pat == L('=')) /* equivalence class */
{
pat++;
bracklen++;
if (*pat == L(']')) /* right bracket can appear as equivalence class */
{
pat++;
bracklen++;
}
in_equiv = 1;
}
else if (in_equiv && c == L('=') && *pat == L(']'))
{
pat++;
bracklen++;
in_equiv = 0;
}
else
bracklen++;
}
while ((c = *pat++) != L(']'));
matlen++; /* bracket expression can only match one char */
bad_bracket:
break;
}
}
return matlen;
}
#undef EXTGLOB_PATTERN_P
#undef MATCH_PATTERN_CHAR
#undef MATCHLEN
#undef FOLD
#undef L
#undef LPAREN
#undef RPAREN
#undef INT
#undef CHAR
|
