53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
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/* Perform binary search - inline version.
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Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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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 the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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__extern_inline void *
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bsearch (const void *__key, const void *__base, size_t __nmemb, size_t __size,
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__compar_fn_t __compar)
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{
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size_t __l, __u, __idx;
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const void *__p;
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int __comparison;
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__l = 0;
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__u = __nmemb;
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while (__l < __u)
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{
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__idx = (__l + __u) / 2;
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__p = (const void *) (((const char *) __base) + (__idx * __size));
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__comparison = (*__compar) (__key, __p);
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if (__comparison < 0)
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__u = __idx;
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else if (__comparison > 0)
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__l = __idx + 1;
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else
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{
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#if __GNUC_PREREQ(4, 6)
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wcast-qual"
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#endif
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return (void *) __p;
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#if __GNUC_PREREQ(4, 6)
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# pragma GCC diagnostic pop
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#endif
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}
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}
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return NULL;
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}
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