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cdesktopenv/cde/programs/dtcm/libDtCmP/getdate.y

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/*******************************************************************************
**
** getdate.y
**
** $XConsortium: getdate.y /main/3 1995/11/03 10:38:01 rswiston $
**
** RESTRICTED CONFIDENTIAL INFORMATION:
**
** The information in this document is subject to special
** restrictions in a confidential disclosure agreement between
** HP, IBM, Sun, USL, SCO and Univel. Do not distribute this
** document outside HP, IBM, Sun, USL, SCO, or Univel without
** Sun's specific written approval. This document and all copies
** and derivative works thereof must be returned or destroyed at
** Sun's request.
**
** Copyright 1993 Sun Microsystems, Inc. All rights reserved.
**
*******************************************************************************/
/* *
* (c) Copyright 1993, 1994 Hewlett-Packard Company *
* (c) Copyright 1993, 1994 International Business Machines Corp. *
* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
* (c) Copyright 1993, 1994 Novell, Inc. *
*/
%{
#ifndef lint
__attribute__((unused))
static char sccsid[] = "@(#)getdate.y 1.10 94/11/07 Copyr 1993 Sun Microsystems, Inc.";
#endif
%}
%token ID MONTH DAY MERIDIAN NUMBER UNIT MUNIT SUNIT ZONE DAYZONE AGO
%{
/* Steven M. Bellovin (unc!smb) */
/* Dept. of Computer Science */
/* University of North Carolina at Chapel Hill */
/* @(#)getdate.y 2.6 4/20/84 */
#include <EUSCompat.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#include "getdate.h"
#ifdef SVR4
#include <sys/time.h>
#endif /* SVR4 */
#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, daylightsavings;
static int dayord, dayreq;
static int month, day, year;
static int noyear;
static int ourzone;
#define AM 1
#define PM 2
#define DAYLIGHT 1
#define STANDARD 2
#define MAYBE 3
#ifdef SVR4
extern long timezone;
#endif
%}
%%
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 {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; ss = $5; merid = 24;}
| NUMBER ':' NUMBER ':' NUMBER MERIDIAN
{hh = $1; mm = $3; ss = $5; merid = $6;};
zone: ZONE
{ourzone = $1; daylightsavings = STANDARD;}
| DAYZONE
{ourzone = $1; daylightsavings = DAYLIGHT;};
dyspec: DAY
{dayord = 1; dayreq = $1;}
| DAY ','
{dayord = 1; dayreq = $1;}
| NUMBER ' ' DAY
{dayord = $1; dayreq = $3;};
dtspec: NUMBER '/' NUMBER
{month = $1; day = $3; noyear = 1;}
| NUMBER '/' NUMBER '/' NUMBER
{month = $1; day = $3; year = $5;}
| NUMBER '-' NUMBER
{month = $1; day = $3; noyear = 1;}
| NUMBER '-' NUMBER '-' NUMBER
{month = $1; day = $3; year = $5;}
| MONTH NUMBER
{month = $1; day = $2; noyear = 1;}
| MONTH NUMBER ',' NUMBER
{month = $1; day = $2; year = $4;}
| NUMBER ' ' MONTH
{month = $3; day = $1; noyear = 1;}
| NUMBER ' ' MONTH ' ' NUMBER
{month = $3; day = $1; year = $5;};
rspec: NUMBER ' ' UNIT
{relsec += 60L * $1 * $3;}
| NUMBER ' ' MUNIT
{relmonth += $1 * $3;}
| 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 BOT_YEAR
extern struct tm *localtime();
time_t dateconv(int mm,
int dd,
int yy,
int h,
int m,
int s,
int mer,
int zone,
int dayflag)
{
time_t tod, jdate;
int i;
if (yy < 0) yy = -yy;
if (yy < 70)
yy += 2000;
else if (yy < 100)
yy += 1900;
mdays[1] = 28 + (yy%4 == 0);
if (yy < epoch)
return(DATE_BBOT);
if (yy > EOT_YEAR)
return(DATE_AEOT);
if (mm < 1 || mm > 12)
return(DATE_BMONTH);
if (dd < 1 || dd > mdays[--mm])
return(DATE_BDAY);
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 (tod);
jdate += tod;
if (dayflag==DAYLIGHT || (dayflag==MAYBE&&localtime(&jdate)->tm_isdst))
jdate += -1*60*60;
return (jdate);
}
time_t dayconv(int ord, int day, time_t now)
{
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);
}
time_t timeconv(int hh, int mm, int ss, int mer)
{
if (mm < 0 || mm > 59 || ss < 0 || ss > 59) return (DATE_BMIN);
switch (mer) {
case AM: if (hh < 1 || hh > 12) return(DATE_BHOUR);
return (60L * ((hh%12)*60L + mm)+ss);
case PM: if (hh < 1 || hh > 12) return(DATE_BHOUR);
return (60L * ((hh%12 +12)*60L + mm)+ss);
case 24: if (hh < 0 || hh > 23) return (DATE_BHOUR);
return (60L * (hh*60L + mm)+ss);
default: return (DATE_CONV);
}
}
time_t monthadd(time_t sdate, time_t relmonth)
{
struct tm *ltime;
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);
}
time_t daylcorr(time_t future, time_t 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);
}
struct table {
char *name;
int type, value;
};
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
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},
{"bst", ZONE, 11 HRS}, /* Bering */
{"b.s.t.", ZONE, 11 HRS},
{"bdt", DAYZONE, 11 HRS},
{"b.d.t.", DAYZONE, 11 HRS},
{"gmt", ZONE, 0 HRS},
{"g.m.t.", ZONE, 0 HRS},
{"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 daylightsavings time there, I'm told */
{0, 0, 0}};
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}};
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},
{"eighth", NUMBER, 8},
{"ninth", NUMBER, 9},
{"tenth", NUMBER, 10},
{"eleventh", NUMBER, 11},
{"twelfth", NUMBER, 12},
{"ago", AGO, 1},
{0, 0, 0}};
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(char *id)
{
#define gotit (yylval=i->value, i->type)
#define getid for(j=idvar, k=id; (*j++ = *k++); )
char idvar[20];
char *j, *k;
struct table *i;
int abbrev;
getid;
if (strlen(idvar) == 3) abbrev = 1;
else if (strlen(idvar) == 4 && idvar[3] == '.') {
abbrev = 1;
idvar[3] = '\0';
}
else abbrev = 0;
if (islower(*idvar)) *idvar = toupper(*idvar);
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;
}
}
getid;
for (i = mztab; i->name; i++)
if (strcmp(i->name, idvar) == 0) return gotit;
for (j = idvar; *j; j++) if (isupper(*j)) *j = tolower(*j);
for (i=mztab; i->name; i++)
if (strcmp(i->name, idvar) == 0) return gotit;
getid;
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;
getid;
for (i = othertb; i->name; i++)
if (strcmp(i->name, idvar) == 0) return gotit;
getid;
if (strlen(idvar) == 1 && isalpha(*idvar)) {
if (isupper(*idvar)) *idvar = tolower(*idvar);
for (i = milzone; i->name; i++)
if (strcmp(i->name, idvar) == 0) return gotit;
}
return(ID);
}
static char *lptr;
int yylex(void)
{
extern int yylval;
int sign;
char c;
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=='.')
*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++);
}
}
time_t cm_getdate(char *p, struct timeb *now)
{
#define mcheck(f) if (f>1) err++
int err;
struct tm *lt=NULL;
time_t sdate, tod;
struct timeb ftz;
lptr = p;
if (now == ((struct timeb *) NULL)) {
now = &ftz;
#if defined(SVR4) || defined(__OpenBSD__)
tod = time(0);
lt = localtime(&tod);
now->time = lt->tm_sec;
#ifdef __OpenBSD__
now->timezone = lt->tm_gmtoff / 60;
#else
now->timezone = timezone/60;
#endif
#else
ftime(&ftz);
#endif /* SVR4 */
}
if (lt == NULL)
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;
daylightsavings = MAYBE;
hh = mm = ss = 0;
merid = 24;
if ((err = yyparse())) return (-1);
mcheck(timeflag);
mcheck(zoneflag);
mcheck(dateflag);
mcheck(dayflag);
if (err) return (-1);
/* Relflag also needs to set the sdate variable */
/* This fixes QAR 28447 */
if (dateflag || timeflag || dayflag || relflag) {
sdate = dateconv(month, day, year, hh, mm, ss, merid, ourzone,
daylightsavings);
if (sdate < 0) return(sdate);
/*
if more than 6 months ago, then probably means
next year
if (noyear && sdate < now->time - daysec*(365/2)) {
year++;
sdate = dateconv(month, day, year, hh, mm, ss,
merid, ourzone, daylightsavings);
} */
}
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;
}
return sdate;
}
void
yyerror(char *s)
{
}
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