1 files changed, 52 insertions, 0 deletions
diff --git a/src/lib/guid.h b/src/lib/guid.h
new file mode 100644
index 0000000..0bf58d8
--- /dev/null
+++ b/src/lib/guid.h
@@ -0,0 +1,52 @@
+#ifndef GUID_H
+#define GUID_H
+
+#define GUID_128_SIZE 16
+typedef uint8_t guid_128_t[GUID_128_SIZE];
+
+#define GUID_128_HOST_HASH_SIZE 4
+
+ARRAY_DEFINE_TYPE(guid_128_t, guid_128_t);
+
+enum uuid_format {
+	FORMAT_RECORD,
+	FORMAT_COMPACT,
+	FORMAT_MICROSOFT,
+};
+/* Generate a GUID (contains host name) */
+const char *guid_generate(void);
+/* Generate 128 bit GUID */
+void guid_128_generate(guid_128_t guid_r);
+/* Returns TRUE if GUID is empty (not set / unknown). */
+bool guid_128_is_empty(const guid_128_t guid) ATTR_PURE;
+static inline void guid_128_empty(guid_128_t guid)
+{
+	memset(guid, 0, GUID_128_SIZE);
+}
+/* Returns TRUE if two GUIDs are equal. */
+bool guid_128_equals(const guid_128_t guid1, const guid_128_t guid2) ATTR_PURE;
+/* Copy GUID */
+static inline void guid_128_copy(guid_128_t dest, const guid_128_t src)
+{
+	memcpy(dest, src, GUID_128_SIZE);
+}
+
+/* Returns GUID as a hex string. */
+const char *guid_128_to_string(const guid_128_t guid);
+/* Parse GUID from a string. Returns 0 if ok, -1 if GUID isn't valid. */
+int guid_128_from_string(const char *str, guid_128_t guid_r);
+
+/* Returns GUID as a UUID hex string. */
+const char *guid_128_to_uuid_string(const guid_128_t guid, enum uuid_format format);
+/* Parse GUID from a UUID string. Returns 0 if ok, -1 if UUID isn't valid. */
+int guid_128_from_uuid_string(const char *str, guid_128_t guid_r);
+
+/* guid_128 hash/cmp functions for hash.h */
+unsigned int guid_128_hash(const guid_128_t guid) ATTR_PURE;
+int guid_128_cmp(const guid_128_t guid1, const guid_128_t guid2) ATTR_PURE;
+
+/* Return the hash of host used by guid_128_generate(). */
+void guid_128_host_hash_get(const char *host,
+			    unsigned char hash_r[STATIC_ARRAY GUID_128_HOST_HASH_SIZE]);
+
+#endif