system/include/uuid/uuid.h

#ifndef _UUID_H
#define _UUID_H

typedef unsigned char uuid_t[16];

#define UUID_VARIANT_NCS	    0
#define UUID_VARIANT_DCE	    1
#define UUID_VARIANT_MICROSOFT	2
#define UUID_VARIANT_OTHER	    3

#define UUID_TYPE_DCE_TIME      1
#define UUID_TYPE_DCE_RANDOM    4

#ifdef __cplusplus
extern "C" {
#endif

void uuid_clear(uuid_t uu);
int uuid_compare(const uuid_t uu1, const uuid_t uu2);
void uuid_copy(uuid_t dst, const uuid_t src);
void uuid_generate(uuid_t out);
int uuid_is_null(const uuid_t uu);
int uuid_parse(const char *in, uuid_t uu);
void uuid_unparse(const uuid_t uu, char *out);
void uuid_unparse_lower(const uuid_t uu, char *out);
void uuid_unparse_upper(const uuid_t uu, char *out);
int uuid_type(const uuid_t uu);
int uuid_variant(const uuid_t uu);

#ifdef __cplusplus
}
#endif

#endif /* _UUID_H */