/*
* tclGetDate.y --
*
* Contains yacc grammar for parsing date and time strings.
* The output of this file should be the file tclDate.c which
* is used directly in the Tcl sources.
*
* Copyright (c) 1992-1995 Karl Lehenbauer and Mark Diekhans.
* Copyright (c) 1995-1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclGetDate.y,v 1.2 2001/09/14 01:42:56 zlaski Exp $
*/
%{
/*
* tclDate.c --
*
* This file is generated from a yacc grammar defined in
* the file tclGetDate.y. It should not be edited directly.
*
* Copyright (c) 1992-1995 Karl Lehenbauer and Mark Diekhans.
* Copyright (c) 1995-1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* SCCSID
*/
#include "tclInt.h"
#include "tclPort.h"
#ifdef MAC_TCL
# define EPOCH 1904
# define START_OF_TIME 1904
# define END_OF_TIME 2039
#else
# define EPOCH 1970
# define START_OF_TIME 1902
# define END_OF_TIME 2037
#endif
/*
* The offset of tm_year of struct tm returned by localtime, gmtime, etc.
* I don't know how universal this is; K&R II, the NetBSD manpages, and
* ../compat/strftime.c all agree that tm_year is the year-1900. However,
* some systems may have a different value. This #define should be the
* same as in ../compat/strftime.c.
*/
#define TM_YEAR_BASE 1900
#define HOUR(x) ((int) (60 * x))
#define SECSPERDAY (24L * 60L * 60L)
/*
* An entry in the lexical lookup table.
*/
typedef struct _TABLE {
char *name;
int type;
time_t value;
} TABLE;
/*
* Daylight-savings mode: on, off, or not yet known.
*/
typedef enum _DSTMODE {
DSTon, DSToff, DSTmaybe
} DSTMODE;
/*
* Meridian: am, pm, or 24-hour style.
*/
typedef enum _MERIDIAN {
MERam, MERpm, MER24
} MERIDIAN;
/*
* Global variables. We could get rid of most of these by using a good
* union as the yacc stack. (This routine was originally written before
* yacc had the %union construct.) Maybe someday; right now we only use
* the %union very rarely.
*/
static char *yyInput;
static DSTMODE yyDSTmode;
static time_t yyDayOrdinal;
static time_t yyDayNumber;
static int yyHaveDate;
static int yyHaveDay;
static int yyHaveRel;
static int yyHaveTime;
static int yyHaveZone;
static time_t yyTimezone;
static time_t yyDay;
static time_t yyHour;
static time_t yyMinutes;
static time_t yyMonth;
static time_t yySeconds;
static time_t yyYear;
static MERIDIAN yyMeridian;
static time_t yyRelMonth;
static time_t yyRelSeconds;
/*
* Prototypes of internal functions.
*/
static void yyerror _ANSI_ARGS_((char *s));
static time_t ToSeconds _ANSI_ARGS_((time_t Hours, time_t Minutes,
time_t Seconds, MERIDIAN Meridian));
static int Convert _ANSI_ARGS_((time_t Month, time_t Day, time_t Year,
time_t Hours, time_t Minutes, time_t Seconds,
MERIDIAN Meridia, DSTMODE DSTmode, time_t *TimePtr));
static time_t DSTcorrect _ANSI_ARGS_((time_t Start, time_t Future));
static time_t RelativeDate _ANSI_ARGS_((time_t Start, time_t DayOrdinal,
time_t DayNumber));
static int RelativeMonth _ANSI_ARGS_((time_t Start, time_t RelMonth,
time_t *TimePtr));
static int LookupWord _ANSI_ARGS_((char *buff));
static int yylex _ANSI_ARGS_((void));
int
yyparse _ANSI_ARGS_((void));
%}
%union {
time_t Number;
enum _MERIDIAN Meridian;
}
%token tAGO tDAY tDAYZONE tID tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT
%token tSEC_UNIT tSNUMBER tUNUMBER tZONE tEPOCH tDST
%type <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT tDST
%type <Number> tSEC_UNIT tSNUMBER tUNUMBER tZONE
%type <Meridian> tMERIDIAN o_merid
%%
spec : /* NULL */
| spec item
;
item : time {
yyHaveTime++;
}
| zone {
yyHaveZone++;
}
| date {
yyHaveDate++;
}
| day {
yyHaveDay++;
}
| rel {
yyHaveRel++;
}
| number
;
time : tUNUMBER tMERIDIAN {
yyHour = $1;
yyMinutes = 0;
yySeconds = 0;
yyMeridian = $2;
}
| tUNUMBER ':' tUNUMBER o_merid {
yyHour = $1;
yyMinutes = $3;
yySeconds = 0;
yyMeridian = $4;
}
| tUNUMBER ':' tUNUMBER tSNUMBER {
yyHour = $1;
yyMinutes = $3;
yyMeridian = MER24;
yyDSTmode = DSToff;
yyTimezone = - ($4 % 100 + ($4 / 100) * 60);
}
| tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
yyHour = $1;
yyMinutes = $3;
yySeconds = $5;
yyMeridian = $6;
}
| tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER {
yyHour = $1;
yyMinutes = $3;
yySeconds = $5;
yyMeridian = MER24;
yyDSTmode = DSToff;
yyTimezone = - ($6 % 100 + ($6 / 100) * 60);
}
;
zone : tZONE tDST {
yyTimezone = $1;
yyDSTmode = DSTon;
}
| tZONE {
yyTimezone = $1;
yyDSTmode = DSToff;
}
| tDAYZONE {
yyTimezone = $1;
yyDSTmode = DSTon;
}
;
day : tDAY {
yyDayOrdinal = 1;
yyDayNumber = $1;
}
| tDAY ',' {
yyDayOrdinal = 1;
yyDayNumber = $1;
}
| tUNUMBER tDAY {
yyDayOrdinal = $1;
yyDayNumber = $2;
}
;
date : tUNUMBER '/' tUNUMBER {
yyMonth = $1;
yyDay = $3;
}
| tUNUMBER '/' tUNUMBER '/' tUNUMBER {
yyMonth = $1;
yyDay = $3;
yyYear = $5;
}
| tMONTH tUNUMBER {
yyMonth = $1;
yyDay = $2;
}
| tMONTH tUNUMBER ',' tUNUMBER {
yyMonth = $1;
yyDay = $2;
yyYear = $4;
}
| tUNUMBER tMONTH {
yyMonth = $2;
yyDay = $1;
}
| tEPOCH {
yyMonth = 1;
yyDay = 1;
yyYear = EPOCH;
}
| tUNUMBER tMONTH tUNUMBER {
yyMonth = $2;
yyDay = $1;
yyYear = $3;
}
;
rel : relunit tAGO {
yyRelSeconds = -yyRelSeconds;
yyRelMonth = -yyRelMonth;
}
| relunit
;
relunit : tUNUMBER tMINUTE_UNIT {
yyRelSeconds += $1 * $2 * 60L;
}
| tSNUMBER tMINUTE_UNIT {
yyRelSeconds += $1 * $2 * 60L;
}
| tMINUTE_UNIT {
yyRelSeconds += $1 * 60L;
}
| tSNUMBER tSEC_UNIT {
yyRelSeconds += $1;
}
| tUNUMBER tSEC_UNIT {
yyRelSeconds += $1;
}
| tSEC_UNIT {
yyRelSeconds++;
}
| tSNUMBER tMONTH_UNIT {
yyRelMonth += $1 * $2;
}
| tUNUMBER tMONTH_UNIT {
yyRelMonth += $1 * $2;
}
| tMONTH_UNIT {
yyRelMonth += $1;
}
;
number : tUNUMBER
{
if (yyHaveTime && yyHaveDate && !yyHaveRel) {
yyYear = $1;
} else {
yyHaveTime++;
if ($1 < 100) {
yyHour = 0;
yyMinutes = $1;
} else {
yyHour = $1 / 100;
yyMinutes = $1 % 100;
}
yySeconds = 0;
yyMeridian = MER24;
}
}
;
o_merid : /* NULL */ {
$$ = MER24;
}
| tMERIDIAN {
$$ = $1;
}
;
%%
/*
* Month and day table.
*/
static TABLE MonthDayTable[] = {
{ "january", tMONTH, 1 },
{ "february", tMONTH, 2 },
{ "march", tMONTH, 3 },
{ "april", tMONTH, 4 },
{ "may", tMONTH, 5 },
{ "june", tMONTH, 6 },
{ "july", tMONTH, 7 },
{ "august", tMONTH, 8 },
{ "september", tMONTH, 9 },
{ "sept", tMONTH, 9 },
{ "october", tMONTH, 10 },
{ "november", tMONTH, 11 },
{ "december", tMONTH, 12 },
{ "sunday", tDAY, 0 },
{ "monday", tDAY, 1 },
{ "tuesday", tDAY, 2 },
{ "tues", tDAY, 2 },
{ "wednesday", tDAY, 3 },
{ "wednes", tDAY, 3 },
{ "thursday", tDAY, 4 },
{ "thur", tDAY, 4 },
{ "thurs", tDAY, 4 },
{ "friday", tDAY, 5 },
{ "saturday", tDAY, 6 },
{ NULL }
};
/*
* Time units table.
*/
static TABLE UnitsTable[] = {
{ "year", tMONTH_UNIT, 12 },
{ "month", tMONTH_UNIT, 1 },
{ "fortnight", tMINUTE_UNIT, 14 * 24 * 60 },
{ "week", tMINUTE_UNIT, 7 * 24 * 60 },
{ "day", tMINUTE_UNIT, 1 * 24 * 60 },
{ "hour", tMINUTE_UNIT, 60 },
{ "minute", tMINUTE_UNIT, 1 },
{ "min", tMINUTE_UNIT, 1 },
{ "second", tSEC_UNIT, 1 },
{ "sec", tSEC_UNIT, 1 },
{ NULL }
};
/*
* Assorted relative-time words.
*/
static TABLE OtherTable[] = {
{ "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 },
{ "yesterday", tMINUTE_UNIT, -1 * 24 * 60 },
{ "today", tMINUTE_UNIT, 0 },
{ "now", tMINUTE_UNIT, 0 },
{ "last", tUNUMBER, -1 },
{ "this", tMINUTE_UNIT, 0 },
{ "next", tUNUMBER, 2 },
#if 0
{ "first", tUNUMBER, 1 },
/* { "second", tUNUMBER, 2 }, */
{ "third", tUNUMBER, 3 },
{ "fourth", tUNUMBER, 4 },
{ "fifth", tUNUMBER, 5 },
{ "sixth", tUNUMBER, 6 },
{ "seventh", tUNUMBER, 7 },
{ "eighth", tUNUMBER, 8 },
{ "ninth", tUNUMBER, 9 },
{ "tenth", tUNUMBER, 10 },
{ "eleventh", tUNUMBER, 11 },
{ "twelfth", tUNUMBER, 12 },
#endif
{ "ago", tAGO, 1 },
{ "epoch", tEPOCH, 0 },
{ NULL }
};
/*
* The timezone table. (Note: This table was modified to not use any floating
* point constants to work around an SGI compiler bug).
*/
static TABLE TimezoneTable[] = {
{ "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */
{ "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */
{ "utc", tZONE, HOUR( 0) },
{ "wet", tZONE, HOUR( 0) } , /* Western European */
{ "bst", tDAYZONE, HOUR( 0) }, /* British Summer */
{ "wat", tZONE, HOUR( 1) }, /* West Africa */
{ "at", tZONE, HOUR( 2) }, /* Azores */
#if 0
/* For completeness. BST is also British Summer, and GST is
* also Guam Standard. */
{ "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
{ "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
#endif
{ "nft", tZONE, HOUR( 7/2) }, /* Newfoundland */
{ "nst", tZONE, HOUR( 7/2) }, /* Newfoundland Standard */
{ "ndt", tDAYZONE, HOUR( 7/2) }, /* Newfoundland Daylight */
{ "ast", tZONE, HOUR( 4) }, /* Atlantic Standard */
{ "adt", tDAYZONE, HOUR( 4) }, /* Atlantic Daylight */
{ "est", tZONE, HOUR( 5) }, /* Eastern Standard */
{ "edt", tDAYZONE, HOUR( 5) }, /* Eastern Daylight */
{ "cst", tZONE, HOUR( 6) }, /* Central Standard */
{ "cdt", tDAYZONE, HOUR( 6) }, /* Central Daylight */
{ "mst", tZONE, HOUR( 7) }, /* Mountain Standard */
{ "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */
{ "pst", tZONE, HOUR( 8) }, /* Pacific Standard */
{ "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */
{ "yst", tZONE, HOUR( 9) }, /* Yukon Standard */
{ "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */
{ "hst", tZONE, HOUR(10) }, /* Hawaii Standard */
{ "hdt", tDAYZONE, HOUR(10) }, /* Hawaii Daylight */
{ "cat", tZONE, HOUR(10) }, /* Central Alaska */
{ "ahst", tZONE, HOUR(10) }, /* Alaska-Hawaii Standard */
{ "nt", tZONE, HOUR(11) }, /* Nome */
{ "idlw", tZONE, HOUR(12) }, /* International Date Line West */
{ "cet", tZONE, -HOUR( 1) }, /* Central European */
{ "met", tZONE, -HOUR( 1) }, /* Middle European */
{ "mewt", tZONE, -HOUR( 1) }, /* Middle European Winter */
{ "mest", tDAYZONE, -HOUR( 1) }, /* Middle European Summer */
{ "swt", tZONE, -HOUR( 1) }, /* Swedish Winter */
{ "sst", tDAYZONE, -HOUR( 1) }, /* Swedish Summer */
{ "fwt", tZONE, -HOUR( 1) }, /* French Winter */
{ "fst", tDAYZONE, -HOUR( 1) }, /* French Summer */
{ "eet", tZONE, -HOUR( 2) }, /* Eastern Europe, USSR Zone 1 */
{ "bt", tZONE, -HOUR( 3) }, /* Baghdad, USSR Zone 2 */
{ "it", tZONE, -HOUR( 7/2) }, /* Iran */
{ "zp4", tZONE, -HOUR( 4) }, /* USSR Zone 3 */
{ "zp5", tZONE, -HOUR( 5) }, /* USSR Zone 4 */
{ "ist", tZONE, -HOUR(11/2) }, /* Indian Standard */
{ "zp6", tZONE, -HOUR( 6) }, /* USSR Zone 5 */
#if 0
/* For completeness. NST is also Newfoundland Stanard, nad SST is
* also Swedish Summer. */
{ "nst", tZONE, -HOUR(13/2) }, /* North Sumatra */
{ "sst", tZONE, -HOUR( 7) }, /* South Sumatra, USSR Zone 6 */
#endif /* 0 */
{ "wast", tZONE, -HOUR( 7) }, /* West Australian Standard */
{ "wadt", tDAYZONE, -HOUR( 7) }, /* West Australian Daylight */
{ "jt", tZONE, -HOUR(15/2) }, /* Java (3pm in Cronusland!) */
{ "cct", tZONE, -HOUR( 8) }, /* China Coast, USSR Zone 7 */
{ "jst", tZONE, -HOUR( 9) }, /* Japan Standard, USSR Zone 8 */
{ "cast", tZONE, -HOUR(19/2) }, /* Central Australian Standard */
{ "cadt", tDAYZONE, -HOUR(19/2) }, /* Central Australian Daylight */
{ "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */
{ "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */
{ "gst", tZONE, -HOUR(10) }, /* Guam Standard, USSR Zone 9 */
{ "nzt", tZONE, -HOUR(12) }, /* New Zealand */
{ "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */
{ "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */
{ "idle", tZONE, -HOUR(12) }, /* International Date Line East */
/* ADDED BY Marco Nijdam */
{ "dst", tDST, HOUR( 0) }, /* DST on (hour is ignored) */
/* End ADDED */
{ NULL }
};
/*
* Military timezone table.
*/
static TABLE MilitaryTable[] = {
{ "a", tZONE, HOUR( 1) },
{ "b", tZONE, HOUR( 2) },
{ "c", tZONE, HOUR( 3) },
{ "d", tZONE, HOUR( 4) },
{ "e", tZONE, HOUR( 5) },
{ "f", tZONE, HOUR( 6) },
{ "g", tZONE, HOUR( 7) },
{ "h", tZONE, HOUR( 8) },
{ "i", tZONE, HOUR( 9) },
{ "k", tZONE, HOUR( 10) },
{ "l", tZONE, HOUR( 11) },
{ "m", tZONE, HOUR( 12) },
{ "n", tZONE, HOUR(- 1) },
{ "o", tZONE, HOUR(- 2) },
{ "p", tZONE, HOUR(- 3) },
{ "q", tZONE, HOUR(- 4) },
{ "r", tZONE, HOUR(- 5) },
{ "s", tZONE, HOUR(- 6) },
{ "t", tZONE, HOUR(- 7) },
{ "u", tZONE, HOUR(- 8) },
{ "v", tZONE, HOUR(- 9) },
{ "w", tZONE, HOUR(-10) },
{ "x", tZONE, HOUR(-11) },
{ "y", tZONE, HOUR(-12) },
{ "z", tZONE, HOUR( 0) },
{ NULL }
};
/*
* Dump error messages in the bit bucket.
*/
static void
yyerror(s)
char *s;
{
}
static time_t
ToSeconds(Hours, Minutes, Seconds, Meridian)
time_t Hours;
time_t Minutes;
time_t Seconds;
MERIDIAN Meridian;
{
if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59)
return -1;
switch (Meridian) {
case MER24:
if (Hours < 0 || Hours > 23)
return -1;
return (Hours * 60L + Minutes) * 60L + Seconds;
case MERam:
if (Hours < 1 || Hours > 12)
return -1;
return ((Hours % 12) * 60L + Minutes) * 60L + Seconds;
case MERpm:
if (Hours < 1 || Hours > 12)
return -1;
return (((Hours % 12) + 12) * 60L + Minutes) * 60L + Seconds;
}
return -1; /* Should never be reached */
}
static int
Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, DSTmode, TimePtr)
time_t Month;
time_t Day;
time_t Year;
time_t Hours;
time_t Minutes;
time_t Seconds;
MERIDIAN Meridian;
DSTMODE DSTmode;
time_t *TimePtr;
{
static int DaysInMonth[12] = {
31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
time_t tod;
time_t Julian;
int i;
DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0)
? 29 : 28;
if (Month < 1 || Month > 12
|| Year < START_OF_TIME || Year > END_OF_TIME
|| Day < 1 || Day > DaysInMonth[(int)--Month])
return -1;
for (Julian = Day - 1, i = 0; i < Month; i++)
Julian += DaysInMonth[i];
if (Year >= EPOCH) {
for (i = EPOCH; i < Year; i++)
Julian += 365 + (i % 4 == 0);
} else {
for (i = Year; i < EPOCH; i++)
Julian -= 365 + (i % 4 == 0);
}
Julian *= SECSPERDAY;
Julian += yyTimezone * 60L;
if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
return -1;
Julian += tod;
if (DSTmode == DSTon
|| (DSTmode == DSTmaybe && TclpGetDate(&Julian, 0)->tm_isdst))
Julian -= 60 * 60;
*TimePtr = Julian;
return 0;
}
static time_t
DSTcorrect(Start, Future)
time_t Start;
time_t Future;
{
time_t StartDay;
time_t FutureDay;
StartDay = (TclpGetDate(&Start, 0)->tm_hour + 1) % 24;
FutureDay = (TclpGetDate(&Future, 0)->tm_hour + 1) % 24;
return (Future - Start) + (StartDay - FutureDay) * 60L * 60L;
}
static time_t
RelativeDate(Start, DayOrdinal, DayNumber)
time_t Start;
time_t DayOrdinal;
time_t DayNumber;
{
struct tm *tm;
time_t now;
now = Start;
tm = TclpGetDate(&now, 0);
now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7);
now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1);
return DSTcorrect(Start, now);
}
static int
RelativeMonth(Start, RelMonth, TimePtr)
time_t Start;
time_t RelMonth;
time_t *TimePtr;
{
struct tm *tm;
time_t Month;
time_t Year;
time_t Julian;
int result;
if (RelMonth == 0) {
*TimePtr = 0;
return 0;
}
tm = TclpGetDate(&Start, 0);
Month = 12 * (tm->tm_year + TM_YEAR_BASE) + tm->tm_mon + RelMonth;
Year = Month / 12;
Month = Month % 12 + 1;
result = Convert(Month, (time_t) tm->tm_mday, Year,
(time_t) tm->tm_hour, (time_t) tm->tm_min, (time_t) tm->tm_sec,
MER24, DSTmaybe, &Julian);
/*
* The following iteration takes into account the case were we jump
* into a "short month". Far example, "one month from Jan 31" will
* fail because there is no Feb 31. The code below will reduce the
* day and try converting the date until we succed or the date equals
* 28 (which always works unless the date is bad in another way).
*/
while ((result != 0) && (tm->tm_mday > 28)) {
tm->tm_mday--;
result = Convert(Month, (time_t) tm->tm_mday, Year,
(time_t) tm->tm_hour, (time_t) tm->tm_min, (time_t) tm->tm_sec,
MER24, DSTmaybe, &Julian);
}
if (result != 0) {
return -1;
}
*TimePtr = DSTcorrect(Start, Julian);
return 0;
}
static int
LookupWord(buff)
char *buff;
{
register char *p;
register char *q;
register TABLE *tp;
int i;
int abbrev;
/*
* Make it lowercase.
*/
for (p = buff; *p; p++) {
if (isupper(UCHAR(*p))) {
*p = (char) tolower(UCHAR(*p));
}
}
if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) {
yylval.Meridian = MERam;
return tMERIDIAN;
}
if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) {
yylval.Meridian = MERpm;
return tMERIDIAN;
}
/*
* See if we have an abbreviation for a month.
*/
if (strlen(buff) == 3) {
abbrev = 1;
} else if (strlen(buff) == 4 && buff[3] == '.') {
abbrev = 1;
buff[3] = '\0';
} else {
abbrev = 0;
}
for (tp = MonthDayTable; tp->name; tp++) {
if (abbrev) {
if (strncmp(buff, tp->name, 3) == 0) {
yylval.Number = tp->value;
return tp->type;
}
} else if (strcmp(buff, tp->name) == 0) {
yylval.Number = tp->value;
return tp->type;
}
}
for (tp = TimezoneTable; tp->name; tp++) {
if (strcmp(buff, tp->name) == 0) {
yylval.Number = tp->value;
return tp->type;
}
}
for (tp = UnitsTable; tp->name; tp++) {
if (strcmp(buff, tp->name) == 0) {
yylval.Number = tp->value;
return tp->type;
}
}
/*
* Strip off any plural and try the units table again.
*/
i = strlen(buff) - 1;
if (buff[i] == 's') {
buff[i] = '\0';
for (tp = UnitsTable; tp->name; tp++) {
if (strcmp(buff, tp->name) == 0) {
yylval.Number = tp->value;
return tp->type;
}
}
}
for (tp = OtherTable; tp->name; tp++) {
if (strcmp(buff, tp->name) == 0) {
yylval.Number = tp->value;
return tp->type;
}
}
/*
* Military timezones.
*/
if (buff[1] == '\0' && isalpha(UCHAR(*buff))) {
for (tp = MilitaryTable; tp->name; tp++) {
if (strcmp(buff, tp->name) == 0) {
yylval.Number = tp->value;
return tp->type;
}
}
}
/*
* Drop out any periods and try the timezone table again.
*/
for (i = 0, p = q = buff; *q; q++)
if (*q != '.') {
*p++ = *q;
} else {
i++;
}
*p = '\0';
if (i) {
for (tp = TimezoneTable; tp->name; tp++) {
if (strcmp(buff, tp->name) == 0) {
yylval.Number = tp->value;
return tp->type;
}
}
}
return tID;
}
static int
yylex()
{
register char c;
register char *p;
char buff[20];
int Count;
int sign;
for ( ; ; ) {
while (isspace((unsigned char) (*yyInput))) {
yyInput++;
}
if (isdigit(c = *yyInput) || c == '-' || c == '+') {
if (c == '-' || c == '+') {
sign = c == '-' ? -1 : 1;
if (!isdigit(*++yyInput)) {
/*
* skip the '-' sign
*/
continue;
}
} else {
sign = 0;
}
for (yylval.Number = 0; isdigit(c = *yyInput++); ) {
yylval.Number = 10 * yylval.Number + c - '0';
}
yyInput--;
if (sign < 0) {
yylval.Number = -yylval.Number;
}
return sign ? tSNUMBER : tUNUMBER;
}
if (isalpha(UCHAR(c))) {
for (p = buff; isalpha(c = *yyInput++) || c == '.'; ) {
if (p < &buff[sizeof buff - 1]) {
*p++ = c;
}
}
*p = '\0';
yyInput--;
return LookupWord(buff);
}
if (c != '(') {
return *yyInput++;
}
Count = 0;
do {
c = *yyInput++;
if (c == '\0') {
return c;
} else if (c == '(') {
Count++;
} else if (c == ')') {
Count--;
}
} while (Count > 0);
}
}
/*
* Specify zone is of -50000 to force GMT. (This allows BST to work).
*/
int
TclGetDate(p, now, zone, timePtr)
char *p;
unsigned long now;
long zone;
unsigned long *timePtr;
{
struct tm *tm;
time_t Start;
time_t Time;
time_t tod;
int thisyear;
yyInput = p;
tm = TclpGetDate((time_t *) &now, 0);
thisyear = tm->tm_year + TM_YEAR_BASE;
yyYear = thisyear;
yyMonth = tm->tm_mon + 1;
yyDay = tm->tm_mday;
yyTimezone = zone;
if (zone == -50000) {
yyDSTmode = DSToff; /* assume GMT */
yyTimezone = 0;
} else {
yyDSTmode = DSTmaybe;
}
yyHour = 0;
yyMinutes = 0;
yySeconds = 0;
yyMeridian = MER24;
yyRelSeconds = 0;
yyRelMonth = 0;
yyHaveDate = 0;
yyHaveDay = 0;
yyHaveRel = 0;
yyHaveTime = 0;
yyHaveZone = 0;
if (yyparse() || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 ||
yyHaveDay > 1) {
return -1;
}
if (yyHaveDate || yyHaveTime || yyHaveDay) {
if (TclDateYear < 0) {
TclDateYear = -TclDateYear;
}
/*
* The following line handles years that are specified using
* only two digits. The line of code below implements a policy
* defined by the X/Open workgroup on the millinium rollover.
* Note: some of those dates may not actually be valid on some
* platforms. The POSIX standard startes that the dates 70-99
* shall refer to 1970-1999 and 00-38 shall refer to 2000-2038.
* This later definition should work on all platforms.
*/
if (TclDateYear < 100) {
if (TclDateYear >= 69) {
TclDateYear += 1900;
} else {
TclDateYear += 2000;
}
}
if (Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
yyMeridian, yyDSTmode, &Start) < 0) {
return -1;
}
} else {
Start = now;
if (!yyHaveRel) {
Start -= ((tm->tm_hour * 60L) + tm->tm_min * 60L) + tm->tm_sec;
}
}
Start += yyRelSeconds;
if (RelativeMonth(Start, yyRelMonth, &Time) < 0) {
return -1;
}
Start += Time;
if (yyHaveDay && !yyHaveDate) {
tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber);
Start += tod;
}
*timePtr = Start;
return 0;
}