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/*
ratproxy - strcasestr implementation
------------------------------------
Some modern operating systems still ship with no strcasestr() or memmem()
implementations in place, for reasons beyond comprehension.
This is a simplified version of the code that ships with NetBSD. The
original code is licensed under a BSD license, as follows:
Copyright (c) 1990, 1993
The Regents of the University of California. All rights reserved.
This code is derived from software contributed to Berkeley by
Chris Torek.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#ifndef _HAVE_STRCASESTR_INL_H
#define _HAVE_STRCASESTR_INL_H
#include "types.h"
static inline _u8* rp_strcasestr(const _u8* haystack, const _u8* needle) {
_u8 c, sc;
_u32 len;
if (!haystack || !needle) return 0;
if ((c = *needle++)) {
c = tolower(c);
len = strlen(needle);
do {
do {
if (!(sc = *haystack++)) return 0;
} while (tolower(sc) != c);
} while (strncasecmp(haystack, needle, len));
haystack--;
}
return (_u8*)haystack;
}
static inline void* rp_memmem(const void* haystack, _u32 h_len, const void* needle, _u32 n_len) {
_u8* sp = (_u8*)haystack;
_u8* pp = (_u8*)needle;
_u8* eos = sp + h_len - n_len;
if (!(haystack && needle && h_len && n_len)) return 0;
while (sp <= eos) {
if (*sp == *pp)
if (memcmp(sp, pp, n_len) == 0) return sp;
sp++;
}
return 0;
}
#endif /* !_HAVE_STRCASESTR_INL_H */
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