#ifndef L2SU_UUID_H_INCLUDED
#define L2SU_UUID_H_INCLUDED

#include <stdint.h>
#include <stdbool.h>

/* A 128-bit GUID as specified by RFC 4122.
 * NOTE: halves[0] is the least significant half of the GUID. */
typedef union tag_uuid_t {
  uint8_t bytes[16];
  uint64_t halves[2];

#define uuid_ls halves[0]
#define uuid_ms halves[1]
} uuid_t;

#define UUID_NULL_INIT { { 0 } }

#define UUID_STRLEN       (36u)
#define UUID_STRLEN_SHORT (32u)

void l2_uuid_random(uuid_t *id);

void l2_uuid_to_string(const uuid_t *id, char *out);
void l2_uuid_to_string_short(const uuid_t *id, char *out);

bool l2_uuid_from_string(uuid_t *id, const char *str);
bool l2_uuid_from_string_short(uuid_t *id, const char *str);

int l2_uuid_compare(const uuid_t *c1, const uuid_t *c2);
void l2_uuid_copy(uuid_t *restrict dest, const uuid_t *restrict src);

#endif /* include guard */