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/*
* Copyright (C) 2006-2017 Apple Inc. All rights reserved.
* Copyright (C) 2015 Electronic Arts, Inc. All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#pragma once
#include <string.h>
#if !HAVE(STRNSTR)
inline char* strnstr(const char* buffer, const char* target, size_t bufferLength)
{
size_t targetLength = strlen(target);
if (targetLength == 0)
return const_cast<char*>(buffer);
for (const char* start = buffer; *start && start + targetLength <= buffer + bufferLength; start++) {
if (*start == *target && strncmp(start + 1, target + 1, targetLength - 1) == 0)
return const_cast<char*>(start);
}
return nullptr;
}
#endif
#if !HAVE(MEMMEM)
inline const void* memmem(const void* haystack, size_t haystackLength, const void* needle, size_t needleLength)
{
const char* pointer = static_cast<const char*>(haystack);
while (haystackLength >= needleLength) {
if (!memcmp(pointer, needle, needleLength))
return pointer;
pointer++;
haystackLength--;
}
return nullptr;
}
#endif
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