Add inline bsearch expansion.

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;
+}