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-rw-r--r--cdb_hash.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/cdb_hash.c b/cdb_hash.c
new file mode 100644
index 0000000..d8e3cb8
--- /dev/null
+++ b/cdb_hash.c
@@ -0,0 +1,21 @@
+/* Public domain. */
+
+#include "cdb.h"
+
+uint32 cdb_hashadd(uint32 h,unsigned char c)
+{
+ h += (h << 5);
+ return h ^ c;
+}
+
+uint32 cdb_hash(char *buf,unsigned int len)
+{
+ uint32 h;
+
+ h = CDB_HASHSTART;
+ while (len) {
+ h = cdb_hashadd(h,*buf++);
+ --len;
+ }
+ return h;
+}