journal: add preliminary incomplete implementation

[elogind.git] / src / journal / lookup3.h

diff --git a/src/journal/lookup3.h b/src/journal/lookup3.h
new file mode 100644 (file)
index 0000000..31cc2f5
--- /dev/null
+++ b/src/journal/lookup3.h
@@ -0,0 +1,25 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef foolookup3hfoo
+#define foolookup3hfoo
+
+#include <inttypes.h>
+#include <sys/types.h>
+
+uint32_t jenkins_hashword(const uint32_t *k, size_t length, uint32_t initval);
+void jenkins_hashword2(const uint32_t *k, size_t length, uint32_t *pc, uint32_t *pb);
+
+uint32_t jenkins_hashlittle(const void *key, size_t length, uint32_t initval);
+void jenkins_hashlittle2(const void *key, size_t length, uint32_t *pc, uint32_t *pb);
+
+uint32_t jenkins_hashbig(const void *key, size_t length, uint32_t initval);
+
+static inline uint64_t hash64(const void *data, size_t length) {
+        uint32_t a = 0, b = 0;
+
+        jenkins_hashlittle2(data, length, &a, &b);
+
+        return ((uint64_t) a << 32ULL) | (uint64_t) b;
+}
+
+#endif