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/*
* tclDate.h --
*
* This header file handles common usage of clock primitives
* between tclDate.c (yacc) and tclClock.c.
*
* Copyright (c) 2014 Serg G. Brester (aka sebres)
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#ifndef _TCLCLOCK_H
#define _TCLCLOCK_H
/*
* Constants
*/
#define JULIAN_DAY_POSIX_EPOCH 2440588
#define GREGORIAN_CHANGE_DATE 2361222
#define SECONDS_PER_DAY 86400
#define JULIAN_SEC_POSIX_EPOCH (((Tcl_WideInt) JULIAN_DAY_POSIX_EPOCH) \
* SECONDS_PER_DAY)
#define FOUR_CENTURIES 146097 /* days */
#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 */
/* 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) */
/*
* Structure containing the fields used in [clock format] and [clock scan]
*/
typedef struct TclDateFields {
/* Cacheable fields: */
Tcl_WideInt seconds; /* Time expressed in seconds from the Posix
* epoch */
Tcl_WideInt localSeconds; /* Local time expressed in nominal seconds
* from the Posix epoch */
time_t tzOffset; /* Time zone offset in seconds east of
* Greenwich */
time_t julianDay; /* Julian Day Number in local time zone */
enum {BCE=1, CE=0} era; /* Era */
time_t gregorian; /* Flag == 1 if the date is Gregorian */
time_t year; /* Year of the era */
time_t dayOfYear; /* Day of the year (1 January == 1) */
time_t month; /* Month number */
time_t dayOfMonth; /* Day of the month */
time_t iso8601Year; /* ISO8601 week-based year */
time_t iso8601Week; /* ISO8601 week number */
time_t dayOfWeek; /* Day of the week */
time_t hour; /* Hours of day (in-between time only calculation) */
time_t minutes; /* Minutes of day (in-between time only calculation) */
time_t secondOfDay; /* Seconds of day (in-between time only calculation) */
/* Non cacheable fields: */
Tcl_Obj *tzName; /* Name (or corresponding DST-abbreviation) of the
* time zone, if set the refCount is incremented */
} TclDateFields;
#define ClockCacheableDateFieldsSize \
TclOffset(TclDateFields, tzName)
/*
* Structure contains return parsed fields.
*/
typedef struct DateInfo {
const char *dateStart;
const char *dateInput;
TclDateFields date;
int flags;
time_t dateHaveDate;
time_t dateMeridian;
time_t dateHaveTime;
time_t dateTimezone;
time_t dateDSTmode;
time_t dateHaveZone;
time_t dateRelMonth;
time_t dateRelDay;
time_t dateRelSeconds;
time_t dateHaveRel;
time_t dateMonthOrdinalIncr;
time_t dateMonthOrdinal;
time_t dateHaveOrdinalMonth;
time_t dateDayOrdinal;
time_t dateDayNumber;
time_t dateHaveDay;
time_t *dateRelPointer;
time_t dateDigitCount;
Tcl_Obj* messages; /* Error messages */
const char* separatrix; /* String separating messages */
} DateInfo;
#define yydate (info->date) /* Date fields used for converting */
#define yyDay (info->date.dayOfMonth)
#define yyMonth (info->date.month)
#define yyYear (info->date.year)
#define yyHour (info->date.hour)
#define yyMinutes (info->date.minutes)
#define yySeconds (info->date.secondOfDay)
#define yyDSTmode (info->dateDSTmode)
#define yyDayOrdinal (info->dateDayOrdinal)
#define yyDayNumber (info->dateDayNumber)
#define yyMonthOrdinalIncr (info->dateMonthOrdinalIncr)
#define yyMonthOrdinal (info->dateMonthOrdinal)
#define yyHaveDate (info->dateHaveDate)
#define yyHaveDay (info->dateHaveDay)
#define yyHaveOrdinalMonth (info->dateHaveOrdinalMonth)
#define yyHaveRel (info->dateHaveRel)
#define yyHaveTime (info->dateHaveTime)
#define yyHaveZone (info->dateHaveZone)
#define yyTimezone (info->dateTimezone)
#define yyMeridian (info->dateMeridian)
#define yyRelMonth (info->dateRelMonth)
#define yyRelDay (info->dateRelDay)
#define yyRelSeconds (info->dateRelSeconds)
#define yyRelPointer (info->dateRelPointer)
#define yyInput (info->dateInput)
#define yyDigitCount (info->dateDigitCount)
inline void
ClockInitDateInfo(DateInfo *info) {
memset(info, 0, sizeof(DateInfo));
}
/*
* Structure containing the command arguments supplied to [clock format] and [clock scan]
*/
#define CLF_EXTENDED (1 << 4)
#define CLF_STRICT (1 << 8)
typedef struct ClockFmtScnCmdArgs {
Tcl_Obj *formatObj; /* Format */
Tcl_Obj *localeObj; /* Name of the locale where the time will be expressed. */
Tcl_Obj *timezoneObj; /* Default time zone in which the time will be expressed */
Tcl_Obj *baseObj; /* Base (scan only) */
int flags; /* Flags control scanning */
} ClockFmtScnCmdArgs;
/*
* Structure containing the client data for [clock]
*/
typedef struct ClockClientData {
int refCount; /* Number of live references. */
Tcl_Obj **literals; /* Pool of object literals. */
/* Cache for current clock parameters, imparted via "configure" */
unsigned long LastTZEpoch;
int currentYearCentury;
int yearOfCenturySwitch;
Tcl_Obj *SystemTimeZone;
Tcl_Obj *SystemSetupTZData;
Tcl_Obj *GMTSetupTimeZone;
Tcl_Obj *GMTSetupTZData;
Tcl_Obj *AnySetupTimeZone;
Tcl_Obj *AnySetupTZData;
Tcl_Obj *LastUnnormSetupTimeZone;
Tcl_Obj *LastSetupTimeZone;
Tcl_Obj *LastSetupTZData;
/* Cache for last base (last-second fast convert if base/tz not changed) */
struct {
Tcl_Obj *timezoneObj;
TclDateFields Date;
} lastBase;
/* Las-minute cache for fast UTC2Local conversion */
struct {
/* keys */
Tcl_Obj *timezoneObj;
int changeover;
Tcl_WideInt seconds;
/* values */
time_t tzOffset;
Tcl_Obj *tzName;
} UTC2Local;
/* Las-minute cache for fast Local2UTC conversion */
struct {
/* keys */
Tcl_Obj *timezoneObj;
int changeover;
Tcl_WideInt localSeconds;
/* values */
time_t tzOffset;
} Local2UTC;
} ClockClientData;
#define ClockDefaultYearCentury 2000
#define ClockDefaultCenturySwitch 38
/*
* Meridian: am, pm, or 24-hour style.
*/
typedef enum _MERIDIAN {
MERam, MERpm, MER24
} MERIDIAN;
/*
* Clock scan and format facilities.
*/
#define CLOCK_FMT_SCN_STORAGE_GC_SIZE 32
#define CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE 12
typedef struct ClockScanToken ClockScanToken;
typedef int ClockScanTokenProc(
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_SIGNED (1 << 8)
typedef enum _CLCKTOK_TYPE {
CTOKT_DIGIT = 1, 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 minSize;
unsigned short int maxSize;
unsigned short int offs;
ClockScanTokenProc *parser;
} ClockScanTokenMap;
typedef struct ClockScanToken {
ClockScanTokenMap *map;
unsigned int lookAhead;
struct {
const char *start;
const char *end;
} tokWord;
} ClockScanToken;
typedef struct ClockFmtScnStorage {
int objRefCount; /* Reference count shared across threads */
ClockScanToken *scnTok;
unsigned int scnTokC;
ClockFormatToken *fmtTok;
unsigned int fmtTokC;
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
ClockFmtScnStorage *nextPtr;
ClockFmtScnStorage *prevPtr;
#endif
/* +Tcl_HashEntry hashEntry /* ClockFmtScnStorage is a derivate of Tcl_HashEntry,
* stored by offset +sizeof(self) */
} ClockFmtScnStorage;
typedef struct ClockLitStorage {
int dummy;
} ClockLitStorage;
/*
* Prototypes of module functions.
*/
MODULE_SCOPE time_t ToSeconds(time_t Hours, time_t Minutes,
time_t Seconds, MERIDIAN Meridian);
MODULE_SCOPE int TclClockFreeScan(Tcl_Interp *interp, DateInfo *info);
/* tclClockFmt.c module declarations */
MODULE_SCOPE ClockFmtScnStorage *
Tcl_GetClockFrmScnFromObj(Tcl_Interp *interp,
Tcl_Obj *objPtr);
MODULE_SCOPE int ClockScan(ClientData clientData, Tcl_Interp *interp,
register DateInfo *info,
Tcl_Obj *strObj, ClockFmtScnCmdArgs *opts);
MODULE_SCOPE void ClockFrmScnClearCaches(void);
/*
* Other externals.
*/
MODULE_SCOPE unsigned long TclEnvEpoch; /* Epoch of the tcl environment
* (if changed with tcl-env). */
#endif /* _TCLCLOCK_H */
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