mirror of
https://git.do.srb2.org/STJr/SRB2.git
synced 2024-11-15 17:22:12 +00:00
121 lines
2.3 KiB
C
121 lines
2.3 KiB
C
/*
|
|
strcasestr -- case insensitive substring searching function.
|
|
*/
|
|
/*
|
|
Copyright 2019-2023 James R.
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source forms, with or without modification, is
|
|
permitted provided that the following condition is met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this
|
|
condition and the following disclaimer.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
|
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#ifdef _MSC_VER
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#ifndef strncasecmp
|
|
#define strncasecmp _strnicmp
|
|
#endif
|
|
|
|
#endif
|
|
|
|
static inline int
|
|
trycmp (char **pp, char *cp,
|
|
const char *q, size_t qn)
|
|
{
|
|
char *p;
|
|
p = (*pp);
|
|
if (strncasecmp(p, q, qn) == 0)
|
|
return 0;
|
|
(*pp) = strchr(&p[1], (*cp));
|
|
return 1;
|
|
}
|
|
|
|
static inline void
|
|
swapp (char ***ppap, char ***ppbp, char **cpap, char **cpbp)
|
|
{
|
|
char **pp;
|
|
char *p;
|
|
|
|
pp = *ppap;
|
|
*ppap = *ppbp;
|
|
*ppbp = pp;
|
|
|
|
p = *cpap;
|
|
*cpap = *cpbp;
|
|
*cpbp = p;
|
|
}
|
|
|
|
char *
|
|
nongnu_strcasestr (const char *s, const char *q)
|
|
{
|
|
size_t qn;
|
|
|
|
char uc;
|
|
char lc;
|
|
|
|
char *up;
|
|
char *lp;
|
|
|
|
char **ppa;
|
|
char **ppb;
|
|
|
|
char *cpa;
|
|
char *cpb;
|
|
|
|
uc = toupper(*q);
|
|
lc = tolower(*q);
|
|
|
|
up = strchr(s, uc);
|
|
lp = strchr(s, lc);
|
|
|
|
if (!( (intptr_t)up|(intptr_t)lp ))
|
|
return 0;
|
|
|
|
if (!lp || ( up && up < lp ))
|
|
{
|
|
ppa = &up;
|
|
ppb = &lp;
|
|
|
|
cpa = &uc;
|
|
cpb = &lc;
|
|
}
|
|
else
|
|
{
|
|
ppa = &lp;
|
|
ppb = &up;
|
|
|
|
cpa = &lc;
|
|
cpb = &uc;
|
|
}
|
|
|
|
qn = strlen(q);
|
|
|
|
for (;;)
|
|
{
|
|
if (trycmp(ppa, cpa, q, qn) == 0)
|
|
return (*ppa);
|
|
|
|
if (!( (intptr_t)up|(intptr_t)lp ))
|
|
break;
|
|
|
|
if (!(*ppa) || ( (*ppb) && (*ppb) < (*ppa) ))
|
|
swapp(&ppa, &ppb, &cpa, &cpb);
|
|
}
|
|
|
|
return 0;
|
|
}
|