66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
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* $Id$
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*
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Copyright (c) 2006-2019 Chung, Hyung-Hwan. All rights reserved.
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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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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY 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 OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(macintosh)
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# include <:qse:cmn:alg.h>
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#else
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# include <qse/cmn/alg.h>
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#endif
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void* qse_bsearch (
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const void *key, const void *base, qse_size_t nmemb,
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qse_size_t size, qse_search_comper_t comper, void* ctx)
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{
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int n;
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const void* mid;
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qse_size_t lim;
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for (lim = nmemb; lim > 0; lim >>= 1)
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{
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mid = ((qse_byte_t*)base) + (lim >> 1) * size;
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n = (comper) (key, mid, ctx);
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if (n == 0) return (void*)mid;
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if (n > 0) { base = ((const qse_byte_t*)mid) + size; lim--; }
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}
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return QSE_NULL;
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}
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void* qse_lsearch (
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const void* key, const void* base, qse_size_t nmemb,
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qse_size_t size, qse_search_comper_t comper, void* ctx)
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{
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while (nmemb > 0)
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{
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if (comper(key, base, ctx) == 0) return (void*)base;
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base = ((const qse_byte_t*)base) + size;
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nmemb--;
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}
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return QSE_NULL;
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}
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