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authorOndrej Bilka <neleai@seznam.cz>2013-02-11 23:18:09 +0100
committerOndrej Bilka <neleai@seznam.cz>2013-02-11 23:18:09 +0100
commit41eda41d7489a428abb46202482136a540ec23dc (patch)
treeb0adeba7c44ac543ba0085bb2f742c196e65348d /bits/stdlib-bsearch.h
parent8ded91fb377ad48c66e8b44929af7214f40f3557 (diff)
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Add inline bsearch expansion.
Diffstat (limited to 'bits/stdlib-bsearch.h')
-rw-r--r--bits/stdlib-bsearch.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/bits/stdlib-bsearch.h b/bits/stdlib-bsearch.h
new file mode 100644
index 0000000..4cb58ab
--- /dev/null
+++ b/bits/stdlib-bsearch.h
@@ -0,0 +1,43 @@
+/* Perform binary search - inline version.
+ Copyright (C) 1991-2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+__extern_inline void *
+bsearch (const void *__key, const void *__base, size_t __nmemb, size_t __size,
+ __compar_fn_t __compar)
+{
+ size_t __l, __u, __idx;
+ const void *__p;
+ int __comparison;
+
+ __l = 0;
+ __u = __nmemb;
+ while (__l < __u)
+ {
+ __idx = (__l + __u) / 2;
+ __p = (void *) (((const char *) __base) + (__idx * __size));
+ __comparison = (*__compar) (__key, __p);
+ if (__comparison < 0)
+ __u = __idx;
+ else if (__comparison > 0)
+ __l = __idx + 1;
+ else
+ return (void *) __p;
+ }
+
+ return NULL;
+}