aboutsummaryrefslogtreecommitdiffstats
path: root/utils/db1-ast/hash/hash_log2.c
diff options
context:
space:
mode:
authortwilson <twilson@f38db490-d61c-443f-a65b-d21fe96a405b>2011-07-06 20:58:12 +0000
committertwilson <twilson@f38db490-d61c-443f-a65b-d21fe96a405b>2011-07-06 20:58:12 +0000
commit9b10a0c265265d787eba75de81be2bc5a286734b (patch)
treeb4a3f36ffe91a5226485088c3bb2c5c6ac698fa1 /utils/db1-ast/hash/hash_log2.c
parentbacd87fb8e73ef3eed30c2f49a5a7a38842f3b51 (diff)
Replace Berkeley DB with SQLite 3
There were some bugs in the very ancient version of Berkeley DB that Asterisk used. Instead of spending the time tracking down the bugs in the Berkeley code we move to the much better documented SQLite 3. Conversion of the old astdb happens at runtime by running the included astdb2sqlite3 utility. The ast_db API with SQLite 3 backend should behave identically to the old Berkeley backend, but in the future we could offer a much more robust interface. We do not include the SQLite 3 library in the source tree, but instead rely upon the distribution-provided libraries. SQLite is so ubiquitous that this should not place undue burden on administrators. git-svn-id: http://svn.digium.com/svn/asterisk/trunk@326589 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'utils/db1-ast/hash/hash_log2.c')
-rw-r--r--utils/db1-ast/hash/hash_log2.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/utils/db1-ast/hash/hash_log2.c b/utils/db1-ast/hash/hash_log2.c
new file mode 100644
index 000000000..b86655d47
--- /dev/null
+++ b/utils/db1-ast/hash/hash_log2.c
@@ -0,0 +1,56 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hash_log2.c 8.2 (Berkeley) 5/31/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include "../include/db.h"
+
+u_int32_t __hash_log2 __P((u_int32_t));
+
+u_int32_t
+__hash_log2(num)
+ u_int32_t num;
+{
+ register u_int32_t i, limit;
+
+ limit = 1;
+ for (i = 0; limit < num; limit = limit << 1, i++);
+ return (i);
+}