/*
**??OSSP?uuid?-?Universally?Unique?Identifier
**??Copyright?（c）?2004-2008?Ralf?S.?Engelschall?
**??Copyright?（c）?2004-2008?The?OSSP?Project?
**
**??This?file?is?part?of?OSSP?uuid?a?library?for?the?generation
**??of?UUIDs?which?can?found?at?http://www.ossp.org/pkg/lib/uuid/
**
**??Permission?to?use?copy?modify?and?distribute?this?software?for
**??any?purpose?with?or?without?fee?is?hereby?granted?provided?that
**??the?above?copyright?notice?and?this?permission?notice?appear?in?all
**??copies.
**
**??THIS?SOFTWARE?IS?PROVIDED?‘‘AS?IS‘‘?AND?ANY?EXPRESSED?OR?IMPLIED
**??WARRANTIES?INCLUDING?BUT?NOT?LIMITED?TO?THE?IMPLIED?WARRANTIES?OF
**??MERCHANTABILITY?AND?FITNESS?FOR?A?PARTICULAR?PURPOSE?ARE?DISCLAIMED.
**??IN?NO?EVENT?SHALL?THE?AUTHORS?AND?COPYRIGHT?HOLDERS?AND?THEIR
**??CONTRIBUTORS?BE?LIABLE?FOR?ANY?DIRECT?INDIRECT?INCIDENTAL
**??SPECIAL?EXEMPLARY?OR?CONSEQUENTIAL?DAMAGES?（INCLUDING?BUT?NOT
**??LIMITED?TO?PROCUREMENT?OF?SUBSTITUTE?GOODS?OR?SERVICES;?LOSS?OF
**??USE?DATA?OR?PROFITS;?OR?BUSINESS?INTERRUPTION）?HOWEVER?CAUSED?AND
**??ON?ANY?THEORY?OF?LIABILITY?WHETHER?IN?CONTRACT?STRICT?LIABILITY
**??OR?TORT?（INCLUDING?NEGLIGENCE?OR?OTHERWISE）?ARISING?IN?ANY?WAY?OUT
**??OF?THE?USE?OF?THIS?SOFTWARE?EVEN?IF?ADVISED?OF?THE?POSSIBILITY?OF
**??SUCH?DAMAGE.
**
**??uuid.c:?library?API?implementation
*/

/*?own?headers?（part?1/2）?*/
#include?“uuid.h“
#include?“uuid_ac.h“

/*?system?headers?*/
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

/*?own?headers?（part?2/2）?*/
#include?“uuid_vers.h“
#include?“uuid_md5.h“
#include?“uuid_sha1.h“
#include?“uuid_prng.h“
#include?“uuid_mac.h“
#include?“uuid_time.h“
#include?“uuid_ui64.h“
#include?“uuid_ui128.h“
#include?“uuid_str.h“
#include?“uuid_bm.h“
#include?“uuid_ac.h“

/*?maximum?number?of?100ns?ticks?of?the?actual?resolution?of?system?clock
???（which?in?our?case?is?1us?（=?1000ns）?because?we?use?gettimeofday（2）?*/
#define?UUIDS_PER_TICK?10

/*?time?offset?between?UUID?and?Unix?Epoch?time?according?to?standards.
???（UUID?UTC?base?time?is?October?15?1582
????Unix?UTC?base?time?is?January??1?1970）?*/
#define?UUID_TIMEOFFSET?“01B21DD213814000“

/*?IEEE?802?MAC?address?encoding/decoding?bit?fields?*/
#define?IEEE_MAC_MCBIT?BM_OCTET（00000001）
#define?IEEE_MAC_LOBIT?BM_OCTET（00000010）

/*?IEEE?802?MAC?address?octet?length?*/
#define?IEEE_MAC_OCTETS?6

/*?UUID?binary?representation?according?to?UUID?standards?*/
typedef?struct?{
????uuid_uint32_t??time_low;??????????????????/*?bits??0-31?of?time?field?*/
????uuid_uint16_t??time_mid;??????????????????/*?bits?32-47?of?time?field?*/
????uuid_uint16_t??time_hi_and_version;???????/*?bits?48-59?of?time?field?plus?4?bit?version?*/
????uuid_uint8_t???clock_seq_hi_and_reserved;?/*?bits??8-13?of?clock?sequence?field?plus?2?bit?variant?*/
????uuid_uint