1 files changed, 79 insertions, 0 deletions

diff --git a/e2fsprogs/e2p/uuid.c b/e2fsprogs/e2p/uuid.c
new file mode 100644
index 000000000..fef3b91e7
--- /dev/null
+++ b/e2fsprogs/e2p/uuid.c
@@ -0,0 +1,79 @@
+/*
+ * uuid.c -- utility routines for manipulating UUID's.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ext2fs/ext2_types.h>
+
+#include "e2p.h"
+
+struct uuid {
+        __u32   time_low;
+        __u16   time_mid;
+        __u16   time_hi_and_version;
+        __u16   clock_seq;
+        __u8    node[6];
+};
+
+/* Returns 1 if the uuid is the NULL uuid */
+int e2p_is_null_uuid(void *uu)
+{
+        __u8    *cp;
+        int     i;
+
+        for (i=0, cp = uu; i < 16; i++)
+                if (*cp)
+                        return 0;
+        return 1;
+}
+
+static void e2p_unpack_uuid(void *in, struct uuid *uu)
+{
+        __u8    *ptr = in;
+        __u32   tmp;
+
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->time_low = tmp;
+
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->time_mid = tmp;
+        
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->time_hi_and_version = tmp;
+
+        tmp = *ptr++;
+        tmp = (tmp << 8) | *ptr++;
+        uu->clock_seq = tmp;
+
+        memcpy(uu->node, ptr, 6);
+}
+
+void e2p_uuid_to_str(void *uu, char *out)
+{
+        struct uuid uuid;
+
+        e2p_unpack_uuid(uu, &uuid);
+        sprintf(out,
+                "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+                uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
+                uuid.clock_seq >> 8, uuid.clock_seq & 0xFF,
+                uuid.node[0], uuid.node[1], uuid.node[2],
+                uuid.node[3], uuid.node[4], uuid.node[5]);
+}
+
+const char *e2p_uuid2str(void *uu)
+{
+        static char buf[80];
+
+        if (e2p_is_null_uuid(uu))
+                return "<none>";
+        e2p_uuid_to_str(uu, buf);
+        return buf;
+}
+