This is a rather stupid implementation as it does the search in linear time. More importantly, it is correct and helps porting gcc. Besides, it can easily be fixed in due time.
41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012.
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This file is part of LibMaxsi.
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LibMaxsi is free software: you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details.
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You should have received a copy of the GNU Lesser General Public License
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along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
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bsearch.cpp
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Binary search.
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*******************************************************************************/
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#include <stdint.h>
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#include <stdlib.h>
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extern "C" void* bsearch(const void* key, const void* base, size_t nmemb,
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size_t size, int (*compare)(const void*, const void*))
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{
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const uint8_t* baseptr = (const uint8_t*) base;
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// TODO: Just a quick and surprisingly correct yet slow implementation.
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for ( size_t i = 0; i < nmemb; i++ )
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{
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const void* candidate = baseptr + i * size;
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if ( !compare(key, candidate) )
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return (void*) candidate;
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}
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return NULL;
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}
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