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- %token ID MONTH DAY MERIDIAN NUMBER UNIT MUNIT SUNIT ZONE DAYZONE AGO DST
- %{
- /* Originally from: Steven M. Bellovin (unc!smb) */
- /* Dept. of Computer Science */
- /* University of North Carolina at Chapel Hill */
- /* @(#)getdate.y 2.17 11/30/87 */
-
- /* MS-DOS port (c) 1990 by Thorsten Ohl, ohl@gnu.ai.mit.edu
- This port is also distributed under the terms of the
- GNU General Public License as published by the
- Free Software Foundation.
-
- Please note that this file is not identical to the
- original GNU release, you should have received this
- code as patch to the official release. */
-
- #ifdef MSDOS
- static char RCS_Id[] =
- "$Header: e:/gnu/fileutil/RCS/getdate.y 1.4.0.2 90/09/19 12:27:47 tho Exp $";
- #endif /* MSDOS */
-
- /* #include "defs.h" JF not used any more */
- #include <sys/types.h>
- #ifdef USG
- struct timeb
- {
- time_t time;
- unsigned short millitm;
- short timezone;
- short dstflag;
- };
- static void ftime ();
- #else
- #include <sys/timeb.h>
- #endif
- #include <ctype.h>
-
- #if defined(BSD4_2) || defined (BSD4_1C)
- #include <sys/time.h>
- #else /* sane */
- #include <time.h>
- #endif /* sane */
-
- #if defined (STDC_HEADERS) || defined (USG)
- #include <string.h>
- #endif
-
- #ifdef __GNUC__
- #define alloca __builtin_alloca
- #else
- #ifdef sparc
- #include <alloca.h>
- #endif
- #endif
-
- #ifdef MSDOS
- #include <malloc.h>
- int getdate_yyparse (void);
- long getdate (char *p, struct timeb *now);
- void ftime (struct timeb *timeb);
- static long dateconv (int mm, int dd, int yy, int h, int m, int s, int mer,
- int zone, int dayflag);
- static long dayconv (int ord, int day, long now);
- static long timeconv (int hh, int mm, int ss, int mer);
- static long monthadd (long sdate, long relmonth);
- static long daylcorr (long future, long now);
- static int lookup (char *id);
- static int yyerror (char *s);
- static int yylex (void);
- #endif /* MSDOS */
-
- #ifndef NULL
- #define NULL 0
- #endif
- #define daysec (24L*60L*60L)
- static int timeflag, zoneflag, dateflag, dayflag, relflag;
- static time_t relsec, relmonth;
- static int hh, mm, ss, merid, day_light;
- static int dayord, dayreq;
- static int month, day, year;
- static int ourzone;
- #define AM 1
- #define PM 2
- #define DAYLIGHT 1
- #define STANDARD 2
- #define MAYBE 3
-
- static time_t timeconv();
- static time_t daylcorr();
- static lookup();
-
- static int yylex ();
- #define yyparse getdate_yyparse
- static int yyerror ();
-
- %}
-
- %%
- timedate: /* empty */
- | timedate item
- ;
-
- item: tspec
- {timeflag++;}
- | zone
- {zoneflag++;}
- | dtspec
- {dateflag++;}
- | dyspec
- {dayflag++;}
- | rspec
- {relflag++;}
- | nspec;
-
- nspec: NUMBER
- {if (timeflag && dateflag && !relflag) year = $1;
- else if ($1 > 10000) {
- dateflag++;
- day= $1%100;
- month= ($1/100)%100;
- year = month/10000;
- } else {timeflag++;hh = $1/100;mm = $1%100;ss = 0;merid = 24;}};
-
- tspec: NUMBER MERIDIAN
- {hh = $1; mm = 0; ss = 0; merid = $2;}
- | NUMBER ':' NUMBER
- {hh = $1; mm = $3; merid = 24;}
- | NUMBER ':' NUMBER MERIDIAN
- {hh = $1; mm = $3; merid = $4;}
- | NUMBER ':' NUMBER NUMBER
- {hh = $1; mm = $3; merid = 24;
- day_light = STANDARD; ourzone = -($4%100 + 60*($4/100));}
- | NUMBER ':' NUMBER ':' NUMBER
- {hh = $1; mm = $3; ss = $5; merid = 24;}
- | NUMBER ':' NUMBER ':' NUMBER MERIDIAN
- {hh = $1; mm = $3; ss = $5; merid = $6;}
- | NUMBER ':' NUMBER ':' NUMBER NUMBER
- {hh = $1; mm = $3; ss = $5; merid = 24;
- day_light = STANDARD; ourzone = -($6%100 + 60*($6/100));};
-
- zone: ZONE dst
- {ourzone = $1; day_light = $2;}
- | DAYZONE
- {ourzone = $1; day_light = DAYLIGHT;};
-
- dst: /* empty */
- { $$ = STANDARD; }
- | DST
- { $$ = DAYLIGHT; };
-
- dyspec: DAY
- {dayord = 1; dayreq = $1;}
- | DAY ','
- {dayord = 1; dayreq = $1;}
- | NUMBER DAY
- {dayord = $1; dayreq = $2;};
-
- dtspec: NUMBER '/' NUMBER
- {month = $1; day = $3;}
- | NUMBER '/' NUMBER '/' NUMBER
- {month = $1; day = $3; year = $5;}
- | MONTH NUMBER
- {month = $1; day = $2;}
- | MONTH NUMBER ',' NUMBER
- {month = $1; day = $2; year = $4;}
- | NUMBER MONTH
- {month = $2; day = $1;}
- | NUMBER MONTH NUMBER
- {month = $2; day = $1; year = $3;};
-
-
- rspec: NUMBER UNIT
- {relsec += 60L * $1 * $2;}
- | NUMBER MUNIT
- {relmonth += $1 * $2;}
- | NUMBER SUNIT
- {relsec += $1;}
- | UNIT
- {relsec += 60L * $1;}
- | MUNIT
- {relmonth += $1;}
- | SUNIT
- {relsec++;}
- | rspec AGO
- {relsec = -relsec; relmonth = -relmonth;};
- %%
-
- static int mdays[12] =
- {31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
- #define epoch 1970
-
- extern struct tm *localtime();
-
- static time_t
- dateconv(mm, dd, yy, h, m, s, mer, zone, dayflag)
- int mm, dd, yy, h, m, s, mer, zone, dayflag;
- {
- time_t tod, jdate;
- register int i;
-
- if (yy < 0) yy = -yy;
- if (yy < 100) yy += 1900;
- mdays[1] = 28 + (yy%4 == 0 && (yy%100 != 0 || yy%400 == 0));
- if (yy < epoch || yy > 1999 || mm < 1 || mm > 12 ||
- dd < 1 || dd > mdays[--mm]) return (-1);
- jdate = dd-1;
- for (i=0; i<mm; i++) jdate += mdays[i];
- for (i = epoch; i < yy; i++) jdate += 365 + (i%4 == 0);
- jdate *= daysec;
- jdate += zone * 60L;
- if ((tod = timeconv(h, m, s, mer)) < 0) return (-1);
- jdate += tod;
- if (dayflag==DAYLIGHT || (dayflag==MAYBE&&localtime(&jdate)->tm_isdst))
- jdate += -1*60*60;
- return (jdate);
- }
-
- static time_t
- dayconv(ord, day, now)
- int ord, day; time_t now;
- {
- register struct tm *loctime;
- time_t tod;
-
- tod = now;
- loctime = localtime(&tod);
- tod += daysec * ((day - loctime->tm_wday + 7) % 7);
- tod += 7*daysec*(ord<=0?ord:ord-1);
- return daylcorr(tod, now);
- }
-
- static time_t
- timeconv(hh, mm, ss, mer)
- register int hh, mm, ss, mer;
- {
- if (mm < 0 || mm > 59 || ss < 0 || ss > 59) return (-1);
- switch (mer) {
- case AM: if (hh < 1 || hh > 12) return(-1);
- return (60L * ((hh%12)*60L + mm)+ss);
- case PM: if (hh < 1 || hh > 12) return(-1);
- return (60L * ((hh%12 +12)*60L + mm)+ss);
- case 24: if (hh < 0 || hh > 23) return (-1);
- return (60L * (hh*60L + mm)+ss);
- default: return (-1);
- }
- }
-
- static time_t
- monthadd(sdate, relmonth)
- time_t sdate, relmonth;
- {
- struct tm *ltime;
- time_t dateconv();
- int mm, yy;
-
- if (relmonth == 0) return 0;
- ltime = localtime(&sdate);
- mm = 12*ltime->tm_year + ltime->tm_mon + relmonth;
- yy = mm/12;
- mm = mm%12 + 1;
- return daylcorr(dateconv(mm, ltime->tm_mday, yy, ltime->tm_hour,
- ltime->tm_min, ltime->tm_sec, 24, ourzone, MAYBE), sdate);
- }
-
- static time_t
- daylcorr(future, now)
- time_t future, now;
- {
- int fdayl, nowdayl;
-
- nowdayl = (localtime(&now)->tm_hour+1) % 24;
- fdayl = (localtime(&future)->tm_hour+1) % 24;
- return (future-now) + 60L*60L*(nowdayl-fdayl);
- }
-
- static char *lptr;
-
- static int
- yylex()
- {
- extern int yylval;
- int sign;
- register char c;
- register char *p;
- char idbuf[20];
- int pcnt;
-
- for (;;) {
- while (isspace(*lptr))
- lptr++;
-
- if (isdigit(c = *lptr) || c == '-' || c == '+') {
- if (c== '-' || c == '+') {
- if (c=='-') sign = -1;
- else sign = 1;
- if (!isdigit(*++lptr)) {
- /* yylval = sign; return (NUMBER); */
- return yylex(); /* skip the '-' sign */
- }
- } else sign = 1;
- yylval = 0;
- while (isdigit(c = *lptr++))
- yylval = 10*yylval + c - '0';
- yylval *= sign;
- lptr--;
- return (NUMBER);
-
- } else if (isalpha(c)) {
- p = idbuf;
- while (isalpha(c = *lptr++) || c=='.')
- if (p < &idbuf[sizeof(idbuf)-1]) *p++ = c;
- *p = '\0';
- lptr--;
- return (lookup(idbuf));
- }
-
- else if (c == '(') {
- pcnt = 0;
- do {
- c = *lptr++;
- if (c == '\0') return(c);
- else if (c == '(') pcnt++;
- else if (c == ')') pcnt--;
- } while (pcnt > 0);
- }
-
- else return (*lptr++);
- }
- }
-
- struct table {
- char *name;
- int type, value;
- };
-
- static struct table mdtab[] = {
- {"january", MONTH, 1},
- {"february", MONTH, 2},
- {"march", MONTH, 3},
- {"april", MONTH, 4},
- {"may", MONTH, 5},
- {"june", MONTH, 6},
- {"july", MONTH, 7},
- {"august", MONTH, 8},
- {"september", MONTH, 9},
- {"sept", MONTH, 9},
- {"october", MONTH, 10},
- {"november", MONTH, 11},
- {"december", MONTH, 12},
-
- {"sunday", DAY, 0},
- {"monday", DAY, 1},
- {"tuesday", DAY, 2},
- {"tues", DAY, 2},
- {"wednesday", DAY, 3},
- {"wednes", DAY, 3},
- {"thursday", DAY, 4},
- {"thur", DAY, 4},
- {"thurs", DAY, 4},
- {"friday", DAY, 5},
- {"saturday", DAY, 6},
- {0, 0, 0}
- };
-
- #define HRS *60
- #define HALFHR 30
-
- static struct table mztab[] = {
- {"a.m.", MERIDIAN, AM},
- {"am", MERIDIAN, AM},
- {"p.m.", MERIDIAN, PM},
- {"pm", MERIDIAN, PM},
- {"nst", ZONE, 3 HRS + HALFHR}, /* Newfoundland */
- {"n.s.t.", ZONE, 3 HRS + HALFHR},
- {"ast", ZONE, 4 HRS}, /* Atlantic */
- {"a.s.t.", ZONE, 4 HRS},
- {"adt", DAYZONE, 4 HRS},
- {"a.d.t.", DAYZONE, 4 HRS},
- {"est", ZONE, 5 HRS}, /* Eastern */
- {"e.s.t.", ZONE, 5 HRS},
- {"edt", DAYZONE, 5 HRS},
- {"e.d.t.", DAYZONE, 5 HRS},
- {"cst", ZONE, 6 HRS}, /* Central */
- {"c.s.t.", ZONE, 6 HRS},
- {"cdt", DAYZONE, 6 HRS},
- {"c.d.t.", DAYZONE, 6 HRS},
- {"mst", ZONE, 7 HRS}, /* Mountain */
- {"m.s.t.", ZONE, 7 HRS},
- {"mdt", DAYZONE, 7 HRS},
- {"m.d.t.", DAYZONE, 7 HRS},
- {"pst", ZONE, 8 HRS}, /* Pacific */
- {"p.s.t.", ZONE, 8 HRS},
- {"pdt", DAYZONE, 8 HRS},
- {"p.d.t.", DAYZONE, 8 HRS},
- {"yst", ZONE, 9 HRS}, /* Yukon */
- {"y.s.t.", ZONE, 9 HRS},
- {"ydt", DAYZONE, 9 HRS},
- {"y.d.t.", DAYZONE, 9 HRS},
- {"hst", ZONE, 10 HRS}, /* Hawaii */
- {"h.s.t.", ZONE, 10 HRS},
- {"hdt", DAYZONE, 10 HRS},
- {"h.d.t.", DAYZONE, 10 HRS},
-
- {"gmt", ZONE, 0 HRS},
- {"g.m.t.", ZONE, 0 HRS},
- {"bst", DAYZONE, 0 HRS}, /* British Summer Time */
- {"b.s.t.", DAYZONE, 0 HRS},
- {"eet", ZONE, 0 HRS}, /* European Eastern Time */
- {"e.e.t.", ZONE, 0 HRS},
- {"eest", DAYZONE, 0 HRS}, /* European Eastern Summer Time */
- {"e.e.s.t.", DAYZONE, 0 HRS},
- {"met", ZONE, -1 HRS}, /* Middle European Time */
- {"m.e.t.", ZONE, -1 HRS},
- {"mest", DAYZONE, -1 HRS}, /* Middle European Summer Time */
- {"m.e.s.t.", DAYZONE, -1 HRS},
- {"wet", ZONE, -2 HRS }, /* Western European Time */
- {"w.e.t.", ZONE, -2 HRS },
- {"west", DAYZONE, -2 HRS}, /* Western European Summer Time */
- {"w.e.s.t.", DAYZONE, -2 HRS},
-
- {"jst", ZONE, -9 HRS}, /* Japan Standard Time */
- {"j.s.t.", ZONE, -9 HRS}, /* Japan Standard Time */
- /* No daylight savings time */
-
- {"aest", ZONE, -10 HRS}, /* Australian Eastern Time */
- {"a.e.s.t.", ZONE, -10 HRS},
- {"aesst", DAYZONE, -10 HRS}, /* Australian Eastern Summer Time */
- {"a.e.s.s.t.", DAYZONE, -10 HRS},
- {"acst", ZONE, -(9 HRS + HALFHR)}, /* Australian Central Time */
- {"a.c.s.t.", ZONE, -(9 HRS + HALFHR)},
- {"acsst", DAYZONE, -(9 HRS + HALFHR)}, /* Australian Central Summer */
- {"a.c.s.s.t.", DAYZONE, -(9 HRS + HALFHR)},
- {"awst", ZONE, -8 HRS}, /* Australian Western Time */
- {"a.w.s.t.", ZONE, -8 HRS}, /* (no daylight time there, I'm told */
- {"dst", DST, 0}, /* Explicit daylight time */
- {0, 0, 0}};
-
- static struct table unittb[] = {
- {"year", MUNIT, 12},
- {"month", MUNIT, 1},
- {"fortnight", UNIT, 14*24*60},
- {"week", UNIT, 7*24*60},
- {"day", UNIT, 1*24*60},
- {"hour", UNIT, 60},
- {"minute", UNIT, 1},
- {"min", UNIT, 1},
- {"second", SUNIT, 1},
- {"sec", SUNIT, 1},
- {0, 0, 0}};
-
- static struct table othertb[] = {
- {"tomorrow", UNIT, 1*24*60},
- {"yesterday", UNIT, -1*24*60},
- {"today", UNIT, 0},
- {"now", UNIT, 0},
- {"last", NUMBER, -1},
- {"this", UNIT, 0},
- {"next", NUMBER, 2},
- {"first", NUMBER, 1},
- /* {"second", NUMBER, 2}, */
- {"third", NUMBER, 3},
- {"fourth", NUMBER, 4},
- {"fifth", NUMBER, 5},
- {"sixth", NUMBER, 6},
- {"seventh", NUMBER, 7},
- {"eigth", NUMBER, 8},
- {"ninth", NUMBER, 9},
- {"tenth", NUMBER, 10},
- {"eleventh", NUMBER, 11},
- {"twelfth", NUMBER, 12},
- {"ago", AGO, 1},
- {0, 0, 0}};
-
- static struct table milzone[] = {
- {"a", ZONE, 1 HRS},
- {"b", ZONE, 2 HRS},
- {"c", ZONE, 3 HRS},
- {"d", ZONE, 4 HRS},
- {"e", ZONE, 5 HRS},
- {"f", ZONE, 6 HRS},
- {"g", ZONE, 7 HRS},
- {"h", ZONE, 8 HRS},
- {"i", ZONE, 9 HRS},
- {"k", ZONE, 10 HRS},
- {"l", ZONE, 11 HRS},
- {"m", ZONE, 12 HRS},
- {"n", ZONE, -1 HRS},
- {"o", ZONE, -2 HRS},
- {"p", ZONE, -3 HRS},
- {"q", ZONE, -4 HRS},
- {"r", ZONE, -5 HRS},
- {"s", ZONE, -6 HRS},
- {"t", ZONE, -7 HRS},
- {"u", ZONE, -8 HRS},
- {"v", ZONE, -9 HRS},
- {"w", ZONE, -10 HRS},
- {"x", ZONE, -11 HRS},
- {"y", ZONE, -12 HRS},
- {"z", ZONE, 0 HRS},
- {0, 0, 0}};
-
- static int
- lookup(id)
- char *id;
- {
- #define gotit (yylval=i->value, i->type)
-
- char idvar[128];
- register char *j, *k;
- register struct table *i;
- int abbrev;
-
- (void) strcpy(idvar, id);
- j = idvar;
- k = id - 1;
- while (*++k)
- *j++ = isupper(*k) ? tolower(*k) : *k;
- *j = '\0';
-
- if (strlen(idvar) == 3)
- abbrev = 1;
- else
- if (strlen(idvar) == 4 && idvar[3] == '.' && idvar[1] != '.') {
- abbrev = 1;
- idvar[3] = '\0';
- }
- else
- abbrev = 0;
-
- for (i = mdtab; i->name; i++) {
- k = idvar;
- for (j = i->name; *j++ == *k++;) {
- if (abbrev && j == i->name+3)
- return gotit;
- if (j[-1] == 0)
- return gotit;
- }
- }
-
- for (i=mztab; i->name; i++)
- if (strcmp(i->name, idvar) == 0)
- return gotit;
-
- for (i=unittb; i->name; i++)
- if (strcmp(i->name, idvar) == 0)
- return gotit;
-
- if (idvar[strlen(idvar)-1] == 's')
- idvar[strlen(idvar)-1] = '\0';
-
- for (i=unittb; i->name; i++)
- if (strcmp(i->name, idvar) == 0)
- return gotit;
-
- for (i = othertb; i->name; i++)
- if (strcmp(i->name, idvar) == 0)
- return gotit;
-
- if (strlen(idvar) == 1 && isalpha(*idvar)) {
- for (i = milzone; i->name; i++)
- if (strcmp(i->name, idvar) == 0)
- return gotit;
- }
-
- return ID;
- }
-
- time_t
- getdate(p, now)
- char *p;
- struct timeb *now;
- {
- #define mcheck(f) if (f>1) err++
- time_t monthadd();
- int err;
- struct tm *lt;
- struct timeb ftz;
-
- time_t sdate, tod;
-
- lptr = p;
- if (now == ((struct timeb *) NULL)) {
- now = &ftz;
- ftime(&ftz);
- }
- lt = localtime(&now->time);
- year = lt->tm_year;
- month = lt->tm_mon+1;
- day = lt->tm_mday;
- relsec = 0; relmonth = 0;
- timeflag=zoneflag=dateflag=dayflag=relflag=0;
- ourzone = now->timezone;
- day_light = MAYBE;
- hh = mm = ss = 0;
- merid = 24;
-
- if (err = yyparse()) return (-1);
-
- mcheck(timeflag);
- mcheck(zoneflag);
- mcheck(dateflag);
- mcheck(dayflag);
-
- if (err) return (-1);
- if (dateflag || timeflag || dayflag) {
- sdate = dateconv(month,day,year,hh,mm,ss,merid,ourzone,day_light);
- if (sdate < 0) return -1;
- }
- else {
- sdate = now->time;
- if (relflag == 0)
- sdate -= (lt->tm_sec + lt->tm_min*60 +
- lt->tm_hour*(60L*60L));
- }
-
- sdate += relsec;
- sdate += monthadd(sdate, relmonth);
-
- if (dayflag && !dateflag) {
- tod = dayconv(dayord, dayreq, sdate);
- sdate += 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 (sdate == -1) ? 0 : sdate;
- }
-
- static int
- yyerror(s)
- char *s;
- {
- return 0;
- }
-
-
- #ifdef USG
- static void
- ftime(timeb)
- struct timeb *timeb;
- {
- extern long timezone;
- #if 0 /* Not all non-BSD libraries have `daylight'. */
- extern int daylight;
- #endif
- long t = 0;
-
- localtime(&t); /* Dummy to init timzeone */
- time(&(timeb->time));
- timeb->millitm=0;
- timeb->timezone=timezone/60; /* Timezone is in seconds! */
- #if 0
- timeb->dstflag=daylight;
- #else
- timeb->dstflag=0;
- #endif
- }
- #endif
-