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Diffstat (limited to 'calendar/gui/getdate.y')
| -rw-r--r-- | calendar/gui/getdate.y | 1004 |
1 files changed, 0 insertions, 1004 deletions
diff --git a/calendar/gui/getdate.y b/calendar/gui/getdate.y deleted file mode 100644 index 43917089d6..0000000000 --- a/calendar/gui/getdate.y +++ /dev/null @@ -1,1004 +0,0 @@ -%{ -/* -** Originally) written by Steven M. Bellovin <smb@research.att.com> while -** at the University of North Carolina at Chapel Hill. Later tweaked by -** a couple of people on Usenet. Completely overhauled by Rich $alz -** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990; -** send any email to Rich. -** -** This grammar has 10 shift/reduce conflicts. -** -** This code is in the public domain and has no copyright. -*/ -/* SUPPRESS 287 on yaccpar_sccsid *//* Unused static variable */ -/* SUPPRESS 288 on yyerrlab *//* Label unused */ - -#include <config.h> -#include <gnome.h> - -/* Since the code of getdate.y is not included in the Emacs executable - itself, there is no need to #define static in this file. Even if - the code were included in the Emacs executable, it probably - wouldn't do any harm to #undef it here; this will only cause - problems if we try to write to a static variable, which I don't - think this code needs to do. */ -#ifdef emacs -#undef static -#endif - -#include <stdio.h> -#include <ctype.h> - -/* The code at the top of get_date which figures out the offset of the - current time zone checks various CPP symbols to see if special - tricks are need, but defaults to using the gettimeofday system call. - Include <sys/time.h> if that will be used. */ - -#if defined(vms) - -#include <types.h> -#include <time.h> - -#else - -#include <sys/types.h> - -#ifdef TIME_WITH_SYS_TIME -#include <sys/time.h> -#include <time.h> -#else -#ifdef HAVE_SYS_TIME_H -#include <sys/time.h> -#else -#include <time.h> -#endif -#endif - -#ifdef timezone -#undef timezone /* needed for sgi */ -#endif - -#if defined(HAVE_SYS_TIMEB_H) -#include <sys/timeb.h> -#else -/* -** We use the obsolete `struct timeb' as part of our interface! -** Since the system doesn't have it, we define it here; -** our callers must do likewise. -*/ -struct timeb { - time_t time; /* Seconds since the epoch */ - unsigned short millitm; /* Field not used */ - short timezone; /* Minutes west of GMT */ - short dstflag; /* Field not used */ -}; -#endif /* defined(HAVE_SYS_TIMEB_H) */ - -#endif /* defined(vms) */ - -#if defined (STDC_HEADERS) || defined (USG) -#include <string.h> -#endif - -/* Some old versions of bison generate parsers that use bcopy. - That loses on systems that don't provide the function, so we have - to redefine it here. */ -#if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy) -#define bcopy(from, to, len) memcpy ((to), (from), (len)) -#endif - -#if defined (STDC_HEADERS) -#include <stdlib.h> -#endif - -/* NOTES on rebuilding getdate.c (particularly for inclusion in CVS - releases): - - We don't want to mess with all the portability hassles of alloca. - In particular, most (all?) versions of bison will use alloca in - their parser. If bison works on your system (e.g. it should work - with gcc), then go ahead and use it, but the more general solution - is to use byacc instead of bison, which should generate a portable - parser. I played with adding "#define alloca dont_use_alloca", to - give an error if the parser generator uses alloca (and thus detect - unportable getdate.c's), but that seems to cause as many problems - as it solves. */ - -extern struct tm *gmtime(); -extern struct tm *localtime(); - -#define yyparse getdate_yyparse -#define yylex getdate_yylex -#define yyerror getdate_yyerror - -static int yylex (void); -static int yyerror (char *s); - -#define EPOCH 1970 -#define HOUR(x) ((time_t)(x) * 60) -#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; - -%} - -%union { - time_t Number; - enum _MERIDIAN Meridian; -} - -%token tAGO tDAY tDAYZONE tID tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT -%token tSEC_UNIT tSNUMBER tUNUMBER tZONE tDST - -%type <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT -%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 { - yyTimezone = $1; - yyDSTmode = DSToff; - } - | tDAYZONE { - yyTimezone = $1; - yyDSTmode = DSTon; - } - | - tZONE tDST { - 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; - } - | tUNUMBER tSNUMBER tSNUMBER { - /* ISO 8601 format. yyyy-mm-dd. */ - yyYear = $1; - yyMonth = -$2; - yyDay = -$3; - } - | tUNUMBER tMONTH tSNUMBER { - /* e.g. 17-JUN-1992. */ - yyDay = $1; - yyMonth = $2; - yyYear = -$3; - } - | tMONTH tUNUMBER { - yyMonth = $1; - yyDay = $2; - } - | tMONTH tUNUMBER ',' tUNUMBER { - yyMonth = $1; - yyDay = $2; - yyYear = $4; - } - | tUNUMBER tMONTH { - yyMonth = $2; - yyDay = $1; - } - | 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 { - if($1>10000) { - yyHaveDate++; - yyDay= ($1)%100; - yyMonth= ($1/100)%100; - yyYear = $1/10000; - } - else { - yyHaveTime++; - if ($1 < 100) { - yyHour = $1; - yyMinutes = 0; - } - else { - yyHour = $1 / 100; - yyMinutes = $1 % 100; - } - yySeconds = 0; - yyMeridian = MER24; - } - } - } - ; - -o_merid : /* NULL */ { - $$ = MER24; - } - | tMERIDIAN { - $$ = $1; - } - ; - -%% - -/* Month and day table. */ -static TABLE const MonthDayTable[] = { - { N_("january"), tMONTH, 1 }, - { N_("february"), tMONTH, 2 }, - { N_("march"), tMONTH, 3 }, - { N_("april"), tMONTH, 4 }, - { N_("may"), tMONTH, 5 }, - { N_("june"), tMONTH, 6 }, - { N_("july"), tMONTH, 7 }, - { N_("august"), tMONTH, 8 }, - { N_("september"), tMONTH, 9 }, - { N_("sept"), tMONTH, 9 }, - { N_("october"), tMONTH, 10 }, - { N_("november"), tMONTH, 11 }, - { N_("december"), tMONTH, 12 }, - { N_("sunday"), tDAY, 0 }, - { N_("monday"), tDAY, 1 }, - { N_("tuesday"), tDAY, 2 }, - { N_("tues"), tDAY, 2 }, - { N_("wednesday"), tDAY, 3 }, - { N_("wednes"), tDAY, 3 }, - { N_("thursday"), tDAY, 4 }, - { N_("thur"), tDAY, 4 }, - { N_("thurs"), tDAY, 4 }, - { N_("friday"), tDAY, 5 }, - { N_("saturday"), tDAY, 6 }, - { NULL } -}; - -/* Time units table. */ -static TABLE const UnitsTable[] = { - { N_("year"), tMONTH_UNIT, 12 }, - { N_("month"), tMONTH_UNIT, 1 }, - { N_("fortnight"), tMINUTE_UNIT, 14 * 24 * 60 }, - { N_("week"), tMINUTE_UNIT, 7 * 24 * 60 }, - { N_("day"), tMINUTE_UNIT, 1 * 24 * 60 }, - { N_("hour"), tMINUTE_UNIT, 60 }, - { N_("minute"), tMINUTE_UNIT, 1 }, - { N_("min"), tMINUTE_UNIT, 1 }, - { N_("second"), tSEC_UNIT, 1 }, - { N_("sec"), tSEC_UNIT, 1 }, - { NULL } -}; - -/* Assorted relative-time words. */ -static TABLE const OtherTable[] = { - { N_("tomorrow"), tMINUTE_UNIT, 1 * 24 * 60 }, - { N_("yesterday"), tMINUTE_UNIT, -1 * 24 * 60 }, - { N_("today"), tMINUTE_UNIT, 0 }, - { N_("now"), tMINUTE_UNIT, 0 }, - { N_("last"), tUNUMBER, -1 }, - { N_("this"), tMINUTE_UNIT, 0 }, - { N_("next"), tUNUMBER, 2 }, - { N_("first"), tUNUMBER, 1 }, -/* { N_("second"), tUNUMBER, 2 }, */ - { N_("third"), tUNUMBER, 3 }, - { N_("fourth"), tUNUMBER, 4 }, - { N_("fifth"), tUNUMBER, 5 }, - { N_("sixth"), tUNUMBER, 6 }, - { N_("seventh"), tUNUMBER, 7 }, - { N_("eighth"), tUNUMBER, 8 }, - { N_("ninth"), tUNUMBER, 9 }, - { N_("tenth"), tUNUMBER, 10 }, - { N_("eleventh"), tUNUMBER, 11 }, - { N_("twelfth"), tUNUMBER, 12 }, - { N_("ago"), tAGO, 1 }, - { NULL } -}; - -/* The timezone table. */ -/* Some of these are commented out because a time_t can't store a float. */ -static TABLE const 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 -#if 0 - { "nft", tZONE, HOUR(3.5) }, /* Newfoundland */ - { "nst", tZONE, HOUR(3.5) }, /* Newfoundland Standard */ - { "ndt", tDAYZONE, HOUR(3.5) }, /* Newfoundland Daylight */ -#endif - { "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 */ -#if 0 - { "it", tZONE, -HOUR(3.5) },/* Iran */ -#endif - { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */ - { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */ -#if 0 - { "ist", tZONE, -HOUR(5.5) },/* Indian Standard */ -#endif - { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */ -#if 0 - /* For completeness. NST is also Newfoundland Stanard, and SST is - * also Swedish Summer. */ - { "nst", tZONE, -HOUR(6.5) },/* 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 */ -#if 0 - { "jt", tZONE, -HOUR(7.5) },/* Java (3pm in Cronusland!) */ -#endif - { "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */ - { "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */ -#if 0 - { "cast", tZONE, -HOUR(9.5) },/* Central Australian Standard */ - { "cadt", tDAYZONE, -HOUR(9.5) },/* Central Australian Daylight */ -#endif - { "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 */ - { NULL } -}; - -/* Military timezone table. */ -static TABLE const 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 } -}; - - - - -/* ARGSUSED */ -static int -yyerror(s) - char *s; -{ - return 0; -} - - -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 * 60L + Minutes) * 60L + Seconds; - case MERpm: - if (Hours < 1 || Hours > 12) - return -1; - return ((Hours + 12) * 60L + Minutes) * 60L + Seconds; - default: - abort (); - } - /* NOTREACHED */ -} - - -static time_t -Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, DSTmode) - time_t Month; - time_t Day; - time_t Year; - time_t Hours; - time_t Minutes; - time_t Seconds; - MERIDIAN Meridian; - DSTMODE DSTmode; -{ - static int DaysInMonth[12] = { - 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 - }; - time_t tod; - time_t Julian; - int i; - - if (Year < 0) - Year = -Year; - if (Year < 100) - Year += 1900; - DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) - ? 29 : 28; - if (Year < EPOCH || Year > 1999 - || Month < 1 || Month > 12 - /* Lint fluff: "conversion from long may lose accuracy" */ - || Day < 1 || Day > DaysInMonth[(int)--Month]) - return -1; - - for (Julian = Day - 1, i = 0; i < Month; i++) - Julian += DaysInMonth[i]; - for (i = EPOCH; i < Year; 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 && localtime(&Julian)->tm_isdst)) - Julian -= 60 * 60; - return Julian; -} - - -static time_t -DSTcorrect(Start, Future) - time_t Start; - time_t Future; -{ - time_t StartDay; - time_t FutureDay; - - StartDay = (localtime(&Start)->tm_hour + 1) % 24; - FutureDay = (localtime(&Future)->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 = localtime(&now); - now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7); - now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1); - return DSTcorrect(Start, now); -} - - -static time_t -RelativeMonth(Start, RelMonth) - time_t Start; - time_t RelMonth; -{ - struct tm *tm; - time_t Month; - time_t Year; - - if (RelMonth == 0) - return 0; - tm = localtime(&Start); - Month = 12 * tm->tm_year + tm->tm_mon + RelMonth; - Year = Month / 12; - Month = Month % 12 + 1; - return DSTcorrect(Start, - 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)); -} - - -static int -LookupWord(buff) - char *buff; -{ - register char *p; - register char *q; - register const TABLE *tp; - int i; - int abbrev; - - /* Make it lowercase. */ - for (p = buff; *p; p++) - if (isupper(*p)) - *p = tolower(*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; - } - - if (strcmp(buff, "dst") == 0) - return tDST; - - 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; - } - buff[i] = 's'; /* Put back for "this" in OtherTable. */ - } - - 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(*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(*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(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; - if (c == '(') - Count++; - else if (c == ')') - Count--; - } while (Count > 0); - } -} - -#define TM_YEAR_ORIGIN 1900 - -/* Yield A - B, measured in seconds. */ -static long -difftm (a, b) - struct tm *a, *b; -{ - int ay = a->tm_year + (TM_YEAR_ORIGIN - 1); - int by = b->tm_year + (TM_YEAR_ORIGIN - 1); - int days = ( - /* difference in day of year */ - a->tm_yday - b->tm_yday - /* + intervening leap days */ - + ((ay >> 2) - (by >> 2)) - - (ay/100 - by/100) - + ((ay/100 >> 2) - (by/100 >> 2)) - /* + difference in years * 365 */ - + (long)(ay-by) * 365 - ); - return (60*(60*(24*days + (a->tm_hour - b->tm_hour)) - + (a->tm_min - b->tm_min)) - + (a->tm_sec - b->tm_sec)); -} - -time_t -get_date(char *p, struct timeb *now); - -time_t -get_date(p, now) - char *p; - struct timeb *now; -{ - struct tm *tm, gmt; - struct timeb ftz; - time_t Start; - time_t tod; - time_t nowtime; - - yyInput = p; - if (now == NULL) { - now = &ftz; - (void)time (&nowtime); - - if (! (tm = gmtime (&nowtime))) - return -1; - gmt = *tm; /* Make a copy, in case localtime modifies *tm. */ - - if (! (tm = localtime (&nowtime))) - return -1; - - ftz.timezone = difftm (&gmt, tm) / 60; - if(tm->tm_isdst) - ftz.timezone += 60; - } - else - { - nowtime = now->time; - } - - tm = localtime(&nowtime); - yyYear = tm->tm_year; - yyMonth = tm->tm_mon + 1; - yyDay = tm->tm_mday; - yyTimezone = now->timezone; - 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) { - Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds, - yyMeridian, yyDSTmode); - if (Start < 0) - return -1; - } - else { - Start = nowtime; - if (!yyHaveRel) - Start -= ((tm->tm_hour * 60L + tm->tm_min) * 60L) + tm->tm_sec; - } - - Start += yyRelSeconds; - Start += RelativeMonth(Start, yyRelMonth); - - if (yyHaveDay && !yyHaveDate) { - tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber); - Start += tod; - } - - /* Have to do *something* with a legitimate -1 so it's distinguishable - * from the error return value. (Alternately could set errno on error.) */ - return Start == -1 ? 0 : Start; -} - - -#if defined(TEST) - -/* ARGSUSED */ -int -main(ac, av) - int ac; - char *av[]; -{ - char buff[128]; - time_t d; - - (void)printf("Enter date, or blank line to exit.\n\t> "); - (void)fflush(stdout); - while (gets(buff) && buff[0]) { - d = get_date(buff, (struct timeb *)NULL); - if (d == -1) - (void)printf("Bad format - couldn't convert.\n"); - else - (void)printf("%s", ctime(&d)); - (void)printf("\t> "); - (void)fflush(stdout); - } - exit(0); - /* NOTREACHED */ -} -#endif /* defined(TEST) */ |