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62 lines
2.3 KiB
C
62 lines
2.3 KiB
C
/*
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* Copyright (C) 2006-2017 Apple Inc. All rights reserved.
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* Copyright (C) 2015 Electronic Arts, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <string.h>
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#if !HAVE(STRNSTR)
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inline char* strnstr(const char* buffer, const char* target, size_t bufferLength)
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{
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size_t targetLength = strlen(target);
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if (targetLength == 0)
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return const_cast<char*>(buffer);
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for (const char* start = buffer; *start && start + targetLength <= buffer + bufferLength; start++) {
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if (*start == *target && strncmp(start + 1, target + 1, targetLength - 1) == 0)
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return const_cast<char*>(start);
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}
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return nullptr;
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}
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#endif
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#if !HAVE(MEMMEM)
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inline const void* memmem(const void* haystack, size_t haystackLength, const void* needle, size_t needleLength)
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{
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const char* pointer = static_cast<const char*>(haystack);
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while (haystackLength >= needleLength) {
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if (!memcmp(pointer, needle, needleLength))
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return pointer;
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pointer++;
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haystackLength--;
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}
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return nullptr;
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}
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#endif
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