#define JDAY_1_JAN_1_CE_JULIAN		1721424
#define JDAY_1_JAN_1_CE_GREGORIAN	1721426
#define ONE_CENTURY_GREGORIAN		36524	/* days */
#define FOUR_YEARS			1461	/* days */
#define ONE_YEAR			365	/* days */


#define CLF_DATE	       (1 << 2)
#define CLF_JULIANDAY	       (1 << 3)
#define CLF_TIME	       (1 << 4)
#define CLF_LOCALSEC	       (1 << 5)
#define CLF_CENTURY	       (1 << 6)
#define CLF_DAYOFMONTH	       (1 << 7)
#define CLF_DAYOFYEAR	       (1 << 8)
#define CLF_SIGNED	       (1 << 15)
/* On demand (lazy) assemble flags */
#define CLF_INVALIDATE_DATE	 (1 << 6) /* assemble year, month, etc. using julianDay */
#define CLF_INVALIDATE_JULIANDAY (1 << 7) /* assemble julianDay using year, month, etc. */
#define CLF_INVALIDATE_SECONDS	 (1 << 8) /* assemble localSeconds (and seconds at end) */
#define CLF_ASSEMBLE_DATE      (1 << 28) /* assemble year, month, etc. using julianDay */
#define CLF_ASSEMBLE_JULIANDAY (1 << 29) /* assemble julianDay using year, month, etc. */
#define CLF_ASSEMBLE_SECONDS   (1 << 30) /* assemble localSeconds (and seconds at end) */


/*
 * Enumeration of the string literals used in [clock]
 */

typedef enum ClockLiteral {

typedef int ClockScanTokenProc(
	ClockFmtScnCmdArgs *opts,
	DateInfo *info,
	ClockScanToken *tok);


#define CLF_DATE      (1 << 2)
#define CLF_JULIANDAY (1 << 3)
#define CLF_TIME      (1 << 4)
#define CLF_LOCALSEC  (1 << 5)
#define CLF_CENTURY   (1 << 6)
#define CLF_SIGNED    (1 << 8)

typedef enum _CLCKTOK_TYPE {
   CTOKT_DIGIT = 1, CTOKT_PARSER, CTOKT_SPACE, CTOKT_WORD
} CLCKTOK_TYPE;

typedef struct ClockFmtScnStorage ClockFmtScnStorage;

typedef struct ClockFormatToken {
    CLCKTOK_TYPE      type;
} ClockFormatToken;

typedef struct ClockScanTokenMap {
    unsigned short int	type;
    unsigned short int	flags;
    unsigned short int	clearFlags;
    unsigned short int	minSize;
    unsigned short int	maxSize;
    unsigned short int	offs;
    ClockScanTokenProc *parser;
    void	       *data;
} ClockScanTokenMap;