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-rw-r--r--lib/util/tsort.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/util/tsort.h b/lib/util/tsort.h
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+++ b/lib/util/tsort.h
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+/*
+ Unix SMB/CIFS implementation.
+
+ typesafe qsort
+
+ Copyright (C) Andrew Tridgell 2010
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _TSORT_H
+#define _TSORT_H
+#include <assert.h>
+
+/*
+ a wrapper around qsort() that ensures the comparison function is
+ type safe.
+ */
+#define TYPESAFE_QSORT(base, numel, comparison) \
+do { \
+ if (numel > 1) { \
+ qsort(base, numel, sizeof((base)[0]), QSORT_CAST comparison); \
+ assert(comparison(&((base)[0]), &((base)[1])) <= 0); \
+ } \
+} while (0)
+
+#endif