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/* Copyright (c) 2000, 2003, 2004 MySQL AB
Use is subject to license terms
This program 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; version 2 of the License.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
/* Funktions for comparing with wild-cards */
#include "mysys_priv.h"
/* Test if a string is "comparable" to a wild-card string */
/* returns 0 if the strings are "comparable" */
char wild_many='*';
char wild_one='?';
char wild_prefix=0; /* QQ this can potentially cause a SIGSEGV */
int wild_compare(register const char *str, register const char *wildstr,
pbool str_is_pattern)
{
char cmp;
DBUG_ENTER("wild_compare");
while (*wildstr)
{
while (*wildstr && *wildstr != wild_many && *wildstr != wild_one)
{
if (*wildstr == wild_prefix && wildstr[1])
{
wildstr++;
if (str_is_pattern && *str++ != wild_prefix)
DBUG_RETURN(1);
}
if (*wildstr++ != *str++)
DBUG_RETURN(1);
}
if (! *wildstr )
DBUG_RETURN(*str != 0);
if (*wildstr++ == wild_one)
{
if (! *str || (str_is_pattern && *str == wild_many))
DBUG_RETURN(1); /* One char; skip */
if (*str++ == wild_prefix && str_is_pattern && *str)
str++;
}
else
{ /* Found '*' */
while (str_is_pattern && *str == wild_many)
str++;
for (; *wildstr == wild_many || *wildstr == wild_one; wildstr++)
if (*wildstr == wild_many)
{
while (str_is_pattern && *str == wild_many)
str++;
}
else
{
if (str_is_pattern && *str == wild_prefix && str[1])
str+=2;
else if (! *str++)
DBUG_RETURN (1);
}
if (!*wildstr)
DBUG_RETURN(0); /* '*' as last char: OK */
if ((cmp= *wildstr) == wild_prefix && wildstr[1] && !str_is_pattern)
cmp=wildstr[1];
for (;;str++)
{
while (*str && *str != cmp)
str++;
if (!*str)
DBUG_RETURN (1);
if (wild_compare(str,wildstr,str_is_pattern) == 0)
DBUG_RETURN (0);
}
/* We will never come here */
}
}
DBUG_RETURN (*str != 0);
} /* wild_compare */
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