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freebsd-skq/usr.bin/calendar/parsedata.c
gonzo a5bee545b3 Fix calculation of the recurring weekdays 
Both the result of the first_dayofweek_of_year and the target
weekday are zero-based (0 fo sunday) while the target month-day
or year-day is 1-based. Adjust logic accordingly.

Also add testcase for this PR to the kyua test suite

PR:		201062
Submitted by:	Richard Narron <comet.berkeley@gmail.com>
MFC after:	1 week
2020-04-03 01:17:43 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1992-2009 Edwin Groothuis <edwin@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <ctype.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include "calendar.h"
static char *showflags(int flags);
static int isonlydigits(char *s, int nostar);
static const char *getmonthname(int i);
static int checkmonth(char *s, size_t *len, size_t *offset, const char **month);
static const char *getdayofweekname(int i);
static int checkdayofweek(char *s, size_t *len, size_t *offset, const char **dow);
static int indextooffset(char *s);
static int parseoffset(char *s);
static char *floattoday(int year, double f);
static char *floattotime(double f);
static int wdayom (int day, int offset, int month, int year);
/*
* Expected styles:
*
* Date ::= Month . ' ' . DayOfMonth |
* Month . ' ' . DayOfWeek . ModifierIndex |
* Month . '/' . DayOfMonth |
* Month . '/' . DayOfWeek . ModifierIndex |
* DayOfMonth . ' ' . Month |
* DayOfMonth . '/' . Month |
* DayOfWeek . ModifierIndex . ' ' .Month |
* DayOfWeek . ModifierIndex . '/' .Month |
* DayOfWeek . ModifierIndex |
* SpecialDay . ModifierOffset
*
* Month ::= MonthName | MonthNumber | '*'
* MonthNumber ::= '0' ... '9' | '00' ... '09' | '10' ... '12'
* MonthName ::= MonthNameShort | MonthNameLong
* MonthNameLong ::= 'January' ... 'December'
* MonthNameShort ::= 'Jan' ... 'Dec' | 'Jan.' ... 'Dec.'
*
* DayOfWeek ::= DayOfWeekShort | DayOfWeekLong
* DayOfWeekShort ::= 'Mon' .. 'Sun'
* DayOfWeekLong ::= 'Monday' .. 'Sunday'
* DayOfMonth ::= '0' ... '9' | '00' ... '09' | '10' ... '29' |
* '30' ... '31' | '*'
*
* ModifierOffset ::= '' | '+' . ModifierNumber | '-' . ModifierNumber
* ModifierNumber ::= '0' ... '9' | '00' ... '99' | '000' ... '299' |
* '300' ... '359' | '360' ... '365'
* ModifierIndex ::= 'Second' | 'Third' | 'Fourth' | 'Fifth' |
* 'First' | 'Last'
*
* SpecialDay ::= 'Easter' | 'Paskha' | 'ChineseNewYear'
*
*/
static int
determinestyle(char *date, int *flags,
char *month, int *imonth, char *dayofmonth, int *idayofmonth,
char *dayofweek, int *idayofweek, char *modifieroffset,
char *modifierindex, char *specialday, char *year, int *iyear)
{
char *p, *p1, *p2, *py;
const char *dow, *pmonth;
char pold;
size_t len, offset;
*flags = F_NONE;
*month = '\0';
*imonth = 0;
*year = '\0';
*iyear = 0;
*dayofmonth = '\0';
*idayofmonth = 0;
*dayofweek = '\0';
*idayofweek = 0;
*modifieroffset = '\0';
*modifierindex = '\0';
*specialday = '\0';
#define CHECKSPECIAL(s1, s2, lens2, type) \
if (s2 != NULL && strncmp(s1, s2, lens2) == 0) { \
*flags |= F_SPECIALDAY; \
*flags |= type; \
*flags |= F_VARIABLE; \
if (strlen(s1) == lens2) { \
strcpy(specialday, s1); \
return (1); \
} \
strncpy(specialday, s1, lens2); \
specialday[lens2] = '\0'; \
strcpy(modifieroffset, s1 + lens2); \
*flags |= F_MODIFIEROFFSET; \
return (1); \
}
if ((p = strchr(date, ' ')) == NULL) {
if ((p = strchr(date, '/')) == NULL) {
CHECKSPECIAL(date, STRING_CNY, strlen(STRING_CNY),
F_CNY);
CHECKSPECIAL(date, ncny.name, ncny.len, F_CNY);
CHECKSPECIAL(date, STRING_NEWMOON,
strlen(STRING_NEWMOON), F_NEWMOON);
CHECKSPECIAL(date, nnewmoon.name, nnewmoon.len,
F_NEWMOON);
CHECKSPECIAL(date, STRING_FULLMOON,
strlen(STRING_FULLMOON), F_FULLMOON);
CHECKSPECIAL(date, nfullmoon.name, nfullmoon.len,
F_FULLMOON);
CHECKSPECIAL(date, STRING_PASKHA,
strlen(STRING_PASKHA), F_PASKHA);
CHECKSPECIAL(date, npaskha.name, npaskha.len, F_PASKHA);
CHECKSPECIAL(date, STRING_EASTER,
strlen(STRING_EASTER), F_EASTER);
CHECKSPECIAL(date, neaster.name, neaster.len, F_EASTER);
CHECKSPECIAL(date, STRING_MAREQUINOX,
strlen(STRING_MAREQUINOX), F_MAREQUINOX);
CHECKSPECIAL(date, nmarequinox.name, nmarequinox.len,
F_SEPEQUINOX);
CHECKSPECIAL(date, STRING_SEPEQUINOX,
strlen(STRING_SEPEQUINOX), F_SEPEQUINOX);
CHECKSPECIAL(date, nsepequinox.name, nsepequinox.len,
F_SEPEQUINOX);
CHECKSPECIAL(date, STRING_JUNSOLSTICE,
strlen(STRING_JUNSOLSTICE), F_JUNSOLSTICE);
CHECKSPECIAL(date, njunsolstice.name, njunsolstice.len,
F_JUNSOLSTICE);
CHECKSPECIAL(date, STRING_DECSOLSTICE,
strlen(STRING_DECSOLSTICE), F_DECSOLSTICE);
CHECKSPECIAL(date, ndecsolstice.name, ndecsolstice.len,
F_DECSOLSTICE);
if (checkdayofweek(date, &len, &offset, &dow) != 0) {
*flags |= F_DAYOFWEEK;
*flags |= F_VARIABLE;
*idayofweek = offset;
if (strlen(date) == len) {
strcpy(dayofweek, date);
return (1);
}
strncpy(dayofweek, date, len);
dayofweek[len] = '\0';
strcpy(modifierindex, date + len);
*flags |= F_MODIFIERINDEX;
return (1);
}
if (isonlydigits(date, 1)) {
/* Assume month number only */
*flags |= F_MONTH;
*imonth = (int)strtol(date, (char **)NULL, 10);
strcpy(month, getmonthname(*imonth));
return(1);
}
return (0);
}
}
/*
* After this, leave by goto-ing to "allfine" or "fail" to restore the
* original data in `date'.
*/
pold = *p;
*p = 0;
p1 = date;
p2 = p + 1;
/* Now p2 points to the next field and p1 to the first field */
if ((py = strchr(p2, '/')) != NULL) {
/* We have a year in the string. Now this is getting tricky */
strcpy(year, p1);
*iyear = (int)strtol(year, NULL, 10);
p1 = p2;
p2 = py + 1;
*py = 0;
*flags |= F_YEAR;
}
/* Check if there is a month-string in the date */
if ((checkmonth(p1, &len, &offset, &pmonth) != 0)
|| (checkmonth(p2, &len, &offset, &pmonth) != 0 && (p2 = p1))) {
/* p2 is the non-month part */
*flags |= F_MONTH;
*imonth = offset;
strcpy(month, getmonthname(offset));
if (isonlydigits(p2, 1)) {
strcpy(dayofmonth, p2);
*idayofmonth = (int)strtol(p2, (char **)NULL, 10);
*flags |= F_DAYOFMONTH;
goto allfine;
}
if (strcmp(p2, "*") == 0) {
*flags |= F_ALLDAY;
goto allfine;
}
if (checkdayofweek(p2, &len, &offset, &dow) != 0) {
*flags |= F_DAYOFWEEK;
*flags |= F_VARIABLE;
*idayofweek = offset;
strcpy(dayofweek, getdayofweekname(offset));
if (strlen(p2) == len)
goto allfine;
strcpy(modifierindex, p2 + len);
*flags |= F_MODIFIERINDEX;
goto allfine;
}
goto fail;
}
/* Check if there is an every-day or every-month in the string */
if ((strcmp(p1, "*") == 0 && isonlydigits(p2, 1))
|| (strcmp(p2, "*") == 0 && isonlydigits(p1, 1) && (p2 = p1))) {
int d;
*flags |= F_ALLMONTH;
*flags |= F_DAYOFMONTH;
d = (int)strtol(p2, (char **)NULL, 10);
*idayofmonth = d;
sprintf(dayofmonth, "%d", d);
goto allfine;
}
/* Month as a number, then a weekday */
if (isonlydigits(p1, 1)
&& checkdayofweek(p2, &len, &offset, &dow) != 0) {
int d;
*flags |= F_MONTH;
*flags |= F_DAYOFWEEK;
*flags |= F_VARIABLE;
*idayofweek = offset;
d = (int)strtol(p1, (char **)NULL, 10);
*imonth = d;
strcpy(month, getmonthname(d));
strcpy(dayofweek, getdayofweekname(offset));
if (strlen(p2) == len)
goto allfine;
strcpy(modifierindex, p2 + len);
*flags |= F_MODIFIERINDEX;
goto allfine;
}
/* If both the month and date are specified as numbers */
if (isonlydigits(p1, 1) && isonlydigits(p2, 0)) {
/* Now who wants to be this ambiguous? :-( */
int m, d;
if (strchr(p2, '*') != NULL)
*flags |= F_VARIABLE;
m = (int)strtol(p1, (char **)NULL, 10);
d = (int)strtol(p2, (char **)NULL, 10);
*flags |= F_MONTH;
*flags |= F_DAYOFMONTH;
if (m > 12) {
*imonth = d;
*idayofmonth = m;
strcpy(month, getmonthname(d));
sprintf(dayofmonth, "%d", m);
} else {
*imonth = m;
*idayofmonth = d;
strcpy(month, getmonthname(m));
sprintf(dayofmonth, "%d", d);
}
goto allfine;
}
/* FALLTHROUGH */
fail:
*p = pold;
return (0);
allfine:
*p = pold;
return (1);
}
void
remember(int *rememberindex, int *y, int *m, int *d, char **ed, int yy, int mm,
int dd, char *extra);
void
remember(int *rememberindex, int *y, int *m, int *d, char **ed, int yy, int mm,
int dd, char *extra)
{
static int warned = 0;
if (*rememberindex >= MAXCOUNT - 1) {
if (warned == 0)
warnx("Index > %d, ignored", MAXCOUNT);
warned++;
return;
}
y[*rememberindex] = yy;
m[*rememberindex] = mm;
d[*rememberindex] = dd;
if (extra != NULL)
strcpy(ed[*rememberindex], extra);
else
ed[*rememberindex][0] = '\0';
*rememberindex += 1;
}
static void
debug_determinestyle(int dateonly, char *date, int flags, char *month,
int imonth, char *dayofmonth, int idayofmonth, char *dayofweek,
int idayofweek, char *modifieroffset, char *modifierindex, char *specialday,
char *year, int iyear)
{
if (dateonly != 0) {
printf("-------\ndate: |%s|\n", date);
if (dateonly == 1)
return;
}
printf("flags: %x - %s\n", flags, showflags(flags));
if (modifieroffset[0] != '\0')
printf("modifieroffset: |%s|\n", modifieroffset);
if (modifierindex[0] != '\0')
printf("modifierindex: |%s|\n", modifierindex);
if (year[0] != '\0')
printf("year: |%s| (%d)\n", year, iyear);
if (month[0] != '\0')
printf("month: |%s| (%d)\n", month, imonth);
if (dayofmonth[0] != '\0')
printf("dayofmonth: |%s| (%d)\n", dayofmonth, idayofmonth);
if (dayofweek[0] != '\0')
printf("dayofweek: |%s| (%d)\n", dayofweek, idayofweek);
if (specialday[0] != '\0')
printf("specialday: |%s|\n", specialday);
}
static struct yearinfo {
int year;
int ieaster, ipaskha, firstcnyday;
double ffullmoon[MAXMOONS], fnewmoon[MAXMOONS];
double ffullmooncny[MAXMOONS], fnewmooncny[MAXMOONS];
int ichinesemonths[MAXMOONS];
double equinoxdays[2], solsticedays[2];
int *monthdays;
struct yearinfo *next;
} *years, *yearinfo;
/*
* Calculate dates with offset from weekdays, like Thurs-3, Wed+2, etc.
* day is the day of the week,
* offset the ordinal number of the weekday in the month.
*/
static int
wdayom (int day, int offset, int month, int year)
{
/* Weekday of first day in month */
int wday1; /* first day of month */
/* Weekday of last day in month */
int wdayn;
int d;
wday1 = first_dayofweek_of_month(year, month);
if (wday1 < 0) /* not set */
return (wday1);
/*
* Date of zeroth or first of our weekday in month, depending on the
* relationship with the first of the month. The range is -6:6.
*/
d = (day - wday1 + 1) % 7;
/*
* Which way are we counting? Offset 0 is invalid, abs (offset) > 5 is
* meaningless, but that's OK. Offset 5 may or may not be meaningless,
* so there's no point in complaining for complaining's sake.
*/
if (offset < 0) { /* back from end of month */
/* FIXME */
wdayn = d;
while (wdayn <= yearinfo->monthdays[month])
wdayn += 7;
d = offset * 7 + wdayn;
} else if (offset > 0){
if (d > 0)
d += offset * 7 - 7;
else
d += offset * 7;
} else
warnx ("Invalid offset 0");
return (d);
}
/*
* Possible date formats include any combination of:
* 3-charmonth (January, Jan, Jan)
* 3-charweekday (Friday, Monday, mon.)
* numeric month or day (1, 2, 04)
*
* Any character may separate them, or they may not be separated. Any line,
* following a line that is matched, that starts with "whitespace", is shown
* along with the matched line.
*/
int
parsedaymonth(char *date, int *yearp, int *monthp, int *dayp, int *flags,
char **edp)
{
char month[100], dayofmonth[100], dayofweek[100], modifieroffset[100];
char syear[100];
char modifierindex[100], specialday[100];
int idayofweek = -1, imonth = -1, idayofmonth = -1, iyear = -1;
int year, remindex;
int d, m, dow, rm, rd, offset;
char *ed;
int retvalsign = 1;
/*
* CONVENTION
*
* Month: 1-12
* Monthname: Jan .. Dec
* Day: 1-31
* Weekday: Mon .. Sun
*
*/
*flags = 0;
if (debug)
debug_determinestyle(1, date, *flags, month, imonth,
dayofmonth, idayofmonth, dayofweek, idayofweek,
modifieroffset, modifierindex, specialday, syear, iyear);
if (determinestyle(date, flags, month, &imonth, dayofmonth,
&idayofmonth, dayofweek, &idayofweek, modifieroffset,
modifierindex, specialday, syear, &iyear) == 0) {
if (debug)
printf("Failed!\n");
return (0);
}
if (debug)
debug_determinestyle(0, date, *flags, month, imonth,
dayofmonth, idayofmonth, dayofweek, idayofweek,
modifieroffset, modifierindex, specialday, syear, iyear);
remindex = 0;
for (year = year1; year <= year2; year++) {
int lflags = *flags;
/* If the year is specified, only do it if it is this year! */
if ((lflags & F_YEAR) != 0)
if (iyear != year)
continue;
lflags &= ~F_YEAR;
/* Get important dates for this year */
yearinfo = years;
while (yearinfo != NULL) {
if (yearinfo->year == year)
break;
yearinfo = yearinfo -> next;
}
if (yearinfo == NULL) {
yearinfo = (struct yearinfo *)calloc(1,
sizeof(struct yearinfo));
if (yearinfo == NULL)
errx(1, "Unable to allocate more years");
yearinfo->year = year;
yearinfo->next = years;
years = yearinfo;
yearinfo->monthdays = monthdaytab[isleap(year)];
yearinfo->ieaster = easter(year);
yearinfo->ipaskha = paskha(year);
fpom(year, UTCOffset, yearinfo->ffullmoon,
yearinfo->fnewmoon);
fpom(year, UTCOFFSET_CNY, yearinfo->ffullmooncny,
yearinfo->fnewmooncny);
fequinoxsolstice(year, UTCOffset,
yearinfo->equinoxdays, yearinfo->solsticedays);
/*
* CNY: Match day with sun longitude at 330` with new
* moon
*/
yearinfo->firstcnyday = calculatesunlongitude30(year,
UTCOFFSET_CNY, yearinfo->ichinesemonths);
for (m = 0; yearinfo->fnewmooncny[m] >= 0; m++) {
if (yearinfo->fnewmooncny[m] >
yearinfo->firstcnyday) {
yearinfo->firstcnyday =
floor(yearinfo->fnewmooncny[m - 1]);
break;
}
}
}
/* Same day every year */
if (lflags == (F_MONTH | F_DAYOFMONTH)) {
if (!remember_ymd(year, imonth, idayofmonth))
continue;
remember(&remindex, yearp, monthp, dayp, edp,
year, imonth, idayofmonth, NULL);
continue;
}
/* XXX Same day every year, but variable */
if (lflags == (F_MONTH | F_DAYOFMONTH | F_VARIABLE)) {
if (!remember_ymd(year, imonth, idayofmonth))
continue;
remember(&remindex, yearp, monthp, dayp, edp,
year, imonth, idayofmonth, NULL);
continue;
}
/* Same day every month */
if (lflags == (F_ALLMONTH | F_DAYOFMONTH)) {
for (m = 1; m <= 12; m++) {
if (!remember_ymd(year, m, idayofmonth))
continue;
remember(&remindex, yearp, monthp, dayp, edp,
year, m, idayofmonth, NULL);
}
continue;
}
/* Every day of a month */
if (lflags == (F_ALLDAY | F_MONTH)) {
for (d = 1; d <= yearinfo->monthdays[imonth]; d++) {
if (!remember_ymd(year, imonth, d))
continue;
remember(&remindex, yearp, monthp, dayp, edp,
year, imonth, d, NULL);
}
continue;
}
/* One day of every month */
if (lflags == (F_ALLMONTH | F_DAYOFWEEK)) {
for (m = 1; m <= 12; m++) {
if (!remember_ymd(year, m, idayofmonth))
continue;
remember(&remindex, yearp, monthp, dayp, edp,
year, m, idayofmonth, NULL);
}
continue;
}
/* Every dayofweek of the year */
if (lflags == (F_DAYOFWEEK | F_VARIABLE)) {
dow = first_dayofweek_of_year(year);
if (dow < 0)
continue;
d = (idayofweek - dow + 7) % 7 + 1;
while (d <= 366) {
if (remember_yd(year, d, &rm, &rd))
remember(&remindex,
yearp, monthp, dayp, edp,
year, rm, rd, NULL);
d += 7;
}
continue;
}
/*
* Every so-manied dayofweek of every month of the year:
* Thu-3
*/
if (lflags == (F_DAYOFWEEK | F_MODIFIERINDEX | F_VARIABLE)) {
offset = indextooffset(modifierindex);
for (m = 0; m <= 12; m++) {
d = wdayom (idayofweek, offset, m, year);
if (remember_ymd(year, m, d)) {
remember(&remindex,
yearp, monthp, dayp, edp,
year, m, d, NULL);
continue;
}
}
continue;
}
/*
* A certain dayofweek of a month
* Jan/Thu-3
*/
if (lflags ==
(F_MONTH | F_DAYOFWEEK | F_MODIFIERINDEX | F_VARIABLE)) {
offset = indextooffset(modifierindex);
dow = first_dayofweek_of_month(year, imonth);
if (dow < 0)
continue;
d = (idayofweek - dow + 7) % 7 + 1;
if (offset > 0) {
while (d <= yearinfo->monthdays[imonth]) {
if (--offset == 0
&& remember_ymd(year, imonth, d)) {
remember(&remindex,
yearp, monthp, dayp, edp,
year, imonth, d, NULL);
continue;
}
d += 7;
}
continue;
}
if (offset < 0) {
while (d <= yearinfo->monthdays[imonth])
d += 7;
while (offset != 0) {
offset++;
d -= 7;
}
if (remember_ymd(year, imonth, d))
remember(&remindex,
yearp, monthp, dayp, edp,
year, imonth, d, NULL);
continue;
}
continue;
}
/* Every dayofweek of the month */
if (lflags == (F_DAYOFWEEK | F_MONTH | F_VARIABLE)) {
dow = first_dayofweek_of_month(year, imonth);
if (dow < 0)
continue;
d = (idayofweek - dow + 7) % 7 + 1;
while (d <= yearinfo->monthdays[imonth]) {
if (remember_ymd(year, imonth, d))
remember(&remindex,
yearp, monthp, dayp, edp,
year, imonth, d, NULL);
d += 7;
}
continue;
}
/* Easter */
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_EASTER)) {
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
if (remember_yd(year, yearinfo->ieaster + offset,
&rm, &rd))
remember(&remindex, yearp, monthp, dayp, edp,
year, rm, rd, NULL);
continue;
}
/* Paskha */
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_PASKHA)) {
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
if (remember_yd(year, yearinfo->ipaskha + offset,
&rm, &rd))
remember(&remindex, yearp, monthp, dayp, edp,
year, rm, rd, NULL);
continue;
}
/* Chinese New Year */
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_CNY)) {
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
if (remember_yd(year, yearinfo->firstcnyday + offset,
&rm, &rd))
remember(&remindex, yearp, monthp, dayp, edp,
year, rm, rd, NULL);
continue;
}
/* FullMoon */
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_FULLMOON)) {
int i;
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
for (i = 0; yearinfo->ffullmoon[i] > 0; i++) {
if (remember_yd(year,
floor(yearinfo->ffullmoon[i]) + offset,
&rm, &rd)) {
ed = floattotime(
yearinfo->ffullmoon[i]);
remember(&remindex,
yearp, monthp, dayp, edp,
year, rm, rd, ed);
}
}
continue;
}
/* NewMoon */
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_NEWMOON)) {
int i;
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
for (i = 0; yearinfo->ffullmoon[i] > 0; i++) {
if (remember_yd(year,
floor(yearinfo->fnewmoon[i]) + offset,
&rm, &rd)) {
ed = floattotime(yearinfo->fnewmoon[i]);
remember(&remindex,
yearp, monthp, dayp, edp,
year, rm, rd, ed);
}
}
continue;
}
/* (Mar|Sep)Equinox */
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_MAREQUINOX)) {
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
if (remember_yd(year, yearinfo->equinoxdays[0] + offset,
&rm, &rd)) {
ed = floattotime(yearinfo->equinoxdays[0]);
remember(&remindex, yearp, monthp, dayp, edp,
year, rm, rd, ed);
}
continue;
}
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_SEPEQUINOX)) {
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
if (remember_yd(year, yearinfo->equinoxdays[1] + offset,
&rm, &rd)) {
ed = floattotime(yearinfo->equinoxdays[1]);
remember(&remindex, yearp, monthp, dayp, edp,
year, rm, rd, ed);
}
continue;
}
/* (Jun|Dec)Solstice */
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_JUNSOLSTICE)) {
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
if (remember_yd(year,
yearinfo->solsticedays[0] + offset, &rm, &rd)) {
ed = floattotime(yearinfo->solsticedays[0]);
remember(&remindex, yearp, monthp, dayp, edp,
year, rm, rd, ed);
}
continue;
}
if ((lflags & ~F_MODIFIEROFFSET) ==
(F_SPECIALDAY | F_VARIABLE | F_DECSOLSTICE)) {
offset = 0;
if ((lflags & F_MODIFIEROFFSET) != 0)
offset = parseoffset(modifieroffset);
if (remember_yd(year,
yearinfo->solsticedays[1] + offset, &rm, &rd)) {
ed = floattotime(yearinfo->solsticedays[1]);
remember(&remindex, yearp, monthp, dayp, edp,
year, rm, rd, ed);
}
continue;
}
if (debug) {
printf("Unprocessed:\n");
debug_determinestyle(2, date, lflags, month, imonth,
dayofmonth, idayofmonth, dayofweek, idayofweek,
modifieroffset, modifierindex, specialday, syear,
iyear);
}
retvalsign = -1;
}
if (retvalsign == -1)
return (-remindex - 1);
else
return (remindex);
}
static char *
showflags(int flags)
{
static char s[1000];
s[0] = '\0';
if ((flags & F_YEAR) != 0)
strcat(s, "year ");
if ((flags & F_MONTH) != 0)
strcat(s, "month ");
if ((flags & F_DAYOFWEEK) != 0)
strcat(s, "dayofweek ");
if ((flags & F_DAYOFMONTH) != 0)
strcat(s, "dayofmonth ");
if ((flags & F_MODIFIERINDEX) != 0)
strcat(s, "modifierindex ");
if ((flags & F_MODIFIEROFFSET) != 0)
strcat(s, "modifieroffset ");
if ((flags & F_SPECIALDAY) != 0)
strcat(s, "specialday ");
if ((flags & F_ALLMONTH) != 0)
strcat(s, "allmonth ");
if ((flags & F_ALLDAY) != 0)
strcat(s, "allday ");
if ((flags & F_VARIABLE) != 0)
strcat(s, "variable ");
if ((flags & F_CNY) != 0)
strcat(s, "chinesenewyear ");
if ((flags & F_PASKHA) != 0)
strcat(s, "paskha ");
if ((flags & F_EASTER) != 0)
strcat(s, "easter ");
if ((flags & F_FULLMOON) != 0)
strcat(s, "fullmoon ");
if ((flags & F_NEWMOON) != 0)
strcat(s, "newmoon ");
if ((flags & F_MAREQUINOX) != 0)
strcat(s, "marequinox ");
if ((flags & F_SEPEQUINOX) != 0)
strcat(s, "sepequinox ");
if ((flags & F_JUNSOLSTICE) != 0)
strcat(s, "junsolstice ");
if ((flags & F_DECSOLSTICE) != 0)
strcat(s, "decsolstice ");
return s;
}
static const char *
getmonthname(int i)
{
if (i <= 0 || i > 12)
return ("");
if (nmonths[i - 1].len != 0 && nmonths[i - 1].name != NULL)
return (nmonths[i - 1].name);
return (months[i - 1]);
}
static int
checkmonth(char *s, size_t *len, size_t *offset, const char **month)
{
struct fixs *n;
int i;
for (i = 0; fnmonths[i].name != NULL; i++) {
n = fnmonths + i;
if (strncasecmp(s, n->name, n->len) == 0) {
*len = n->len;
*month = n->name;
*offset = i + 1;
return (1);
}
}
for (i = 0; nmonths[i].name != NULL; i++) {
n = nmonths + i;
if (strncasecmp(s, n->name, n->len) == 0) {
*len = n->len;
*month = n->name;
*offset = i + 1;
return (1);
}
}
for (i = 0; fmonths[i] != NULL; i++) {
*len = strlen(fmonths[i]);
if (strncasecmp(s, fmonths[i], *len) == 0) {
*month = fmonths[i];
*offset = i + 1;
return (1);
}
}
for (i = 0; months[i] != NULL; i++) {
if (strncasecmp(s, months[i], 3) == 0) {
*len = 3;
*month = months[i];
*offset = i + 1;
return (1);
}
}
return (0);
}
static const char *
getdayofweekname(int i)
{
if (ndays[i].len != 0 && ndays[i].name != NULL)
return (ndays[i].name);
return (days[i]);
}
static int
checkdayofweek(char *s, size_t *len, size_t *offset, const char **dow)
{
struct fixs *n;
int i;
for (i = 0; fndays[i].name != NULL; i++) {
n = fndays + i;
if (strncasecmp(s, n->name, n->len) == 0) {
*len = n->len;
*dow = n->name;
*offset = i;
return (1);
}
}
for (i = 0; ndays[i].name != NULL; i++) {
n = ndays + i;
if (strncasecmp(s, n->name, n->len) == 0) {
*len = n->len;
*dow = n->name;
*offset = i;
return (1);
}
}
for (i = 0; fdays[i] != NULL; i++) {
*len = strlen(fdays[i]);
if (strncasecmp(s, fdays[i], *len) == 0) {
*dow = fdays[i];
*offset = i;
return (1);
}
}
for (i = 0; days[i] != NULL; i++) {
if (strncasecmp(s, days[i], 3) == 0) {
*len = 3;
*dow = days[i];
*offset = i;
return (1);
}
}
return (0);
}
static int
isonlydigits(char *s, int nostar)
{
int i;
for (i = 0; s[i] != '\0'; i++) {
if (nostar == 0 && s[i] == '*' && s[i + 1] == '\0')
return 1;
if (!isdigit((unsigned char)s[i]))
return (0);
}
return (1);
}
static int
indextooffset(char *s)
{
int i;
struct fixs *n;
char *es;
if (s[0] == '+' || s[0] == '-') {
i = strtol (s, &es, 10);
if (*es != '\0') /* trailing junk */
errx (1, "Invalid specifier format: %s\n", s);
return (i);
}
for (i = 0; i < 6; i++) {
if (strcasecmp(s, sequences[i]) == 0) {
if (i == 5)
return (-1);
return (i + 1);
}
}
for (i = 0; i < 6; i++) {
n = nsequences + i;
if (n->len == 0)
continue;
if (strncasecmp(s, n->name, n->len) == 0) {
if (i == 5)
return (-1);
return (i + 1);
}
}
return (0);
}
static int
parseoffset(char *s)
{
return strtol(s, NULL, 10);
}
static char *
floattotime(double f)
{
static char buf[100];
int hh, mm, ss, i;
f -= floor(f);
i = f * SECSPERDAY;
hh = i / SECSPERHOUR;
i %= SECSPERHOUR;
mm = i / SECSPERMINUTE;
i %= SECSPERMINUTE;
ss = i;
sprintf(buf, "%02d:%02d:%02d", hh, mm, ss);
return (buf);
}
static char *
floattoday(int year, double f)
{
static char buf[100];
int i, m, d, hh, mm, ss;
int *cumdays = cumdaytab[isleap(year)];
for (i = 0; 1 + cumdays[i] < f; i++)
;
m = --i;
d = floor(f - 1 - cumdays[i]);
f -= floor(f);
i = f * SECSPERDAY;
hh = i / SECSPERHOUR;
i %= SECSPERHOUR;
mm = i / SECSPERMINUTE;
i %= SECSPERMINUTE;
ss = i;
sprintf(buf, "%02d-%02d %02d:%02d:%02d", m, d, hh, mm, ss);
return (buf);
}
void
dodebug(char *what)
{
int year;
printf("UTCOffset: %g\n", UTCOffset);
printf("eastlongitude: %d\n", EastLongitude);
if (strcmp(what, "moon") == 0) {
double ffullmoon[MAXMOONS], fnewmoon[MAXMOONS];
int i;
for (year = year1; year <= year2; year++) {
fpom(year, UTCOffset, ffullmoon, fnewmoon);
printf("Full moon %d:\t", year);
for (i = 0; ffullmoon[i] >= 0; i++) {
printf("%g (%s) ", ffullmoon[i],
floattoday(year, ffullmoon[i]));
}
printf("\nNew moon %d:\t", year);
for (i = 0; fnewmoon[i] >= 0; i++) {
printf("%g (%s) ", fnewmoon[i],
floattoday(year, fnewmoon[i]));
}
printf("\n");
}
return;
}
if (strcmp(what, "sun") == 0) {
double equinoxdays[2], solsticedays[2];
for (year = year1; year <= year2; year++) {
printf("Sun in %d:\n", year);
fequinoxsolstice(year, UTCOffset, equinoxdays,
solsticedays);
printf("e[0] - %g (%s)\n",
equinoxdays[0],
floattoday(year, equinoxdays[0]));
printf("e[1] - %g (%s)\n",
equinoxdays[1],
floattoday(year, equinoxdays[1]));
printf("s[0] - %g (%s)\n",
solsticedays[0],
floattoday(year, solsticedays[0]));
printf("s[1] - %g (%s)\n",
solsticedays[1],
floattoday(year, solsticedays[1]));
}
return;
}
}
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