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freebsd-dev/usr.bin/calendar/parsedata.c
Greg Lehey 90c72ba909 Handle some expression regressions. 
Explicitly use GNU cpp for preprocessing.
Remove explicit debugging code.
Change some variable names to be less confusing.
Improve some comments.
Improve indentation.

PR:		162211
		168785
MFC after:	2 weeks
2013-06-12 07:52:49 +00:00

1117 lines
28 KiB
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/*-
* 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 ambigious? :-( */
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);
d = (idayofweek - dow + 8) % 7;
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);
d = (idayofweek - dow + 8) % 7;
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);
d = (idayofweek - dow + 8) % 7;
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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