56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
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* $Id$
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*
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Copyright 2006-2012 Chung, Hyung-Hwan.
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This file is part of QSE.
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QSE is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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QSE is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with QSE. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <qse/cmn/alg.h>
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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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