From d89e629e52c3b525424be958de238ed1dc5a0361 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sun, 24 Apr 2005 05:07:59 +0000 Subject: add new subdir for e2fsprogs --- e2fsprogs/e2p/uuid.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 e2fsprogs/e2p/uuid.c (limited to 'e2fsprogs/e2p/uuid.c') 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 +#include +#include + +#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 ""; + e2p_uuid_to_str(uu, buf); + return buf; +} + -- cgit v1.2.3