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taskwarrior/src/Date.cpp
Paul Beckingham 3a8a513d17 Date Support 
- Added Date::week helper method.
2013-08-26 09:15:48 -07:00

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////////////////////////////////////////////////////////////////////////////////
// taskwarrior - a command line task list manager.
//
// Copyright 2006-2013, Paul Beckingham, Federico Hernandez.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// http://www.opensource.org/licenses/mit-license.php
//
////////////////////////////////////////////////////////////////////////////////
#include <cmake.h>
#include <iomanip>
#include <sstream>
#include <time.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <Nibbler.h>
#include <Date.h>
#include <text.h>
#include <util.h>
#include <i18n.h>
#include <Context.h>
static const char* relatives[] =
{
STRING_DATE_SUNDAY_LONG,
STRING_DATE_MONDAY_LONG,
STRING_DATE_TUESDAY_LONG,
STRING_DATE_WEDNESDAY_LONG,
STRING_DATE_THURSDAY_LONG,
STRING_DATE_FRIDAY_LONG,
STRING_DATE_SATURDAY_LONG,
"today",
"tomorrow",
"yesterday",
"eow",
"eoww",
"eocw",
"eocm",
"eom",
"eoq",
"eoy",
"sow",
"soww",
"socw",
"socm",
"som",
"soq",
"soy",
"goodfriday",
"easter",
"eastermonday",
"ascension",
"pentecost",
"midsommar",
"midsommarafton",
"now",
"later",
"someday",
};
#define NUM_RELATIVES (sizeof (relatives) / sizeof (relatives[0]))
extern Context context;
////////////////////////////////////////////////////////////////////////////////
// Defaults to "now".
Date::Date ()
{
_t = time (NULL);
}
////////////////////////////////////////////////////////////////////////////////
Date::Date (const time_t t)
{
_t = t;
}
////////////////////////////////////////////////////////////////////////////////
Date::Date (const int m, const int d, const int y)
{
// Error if not valid.
struct tm t = {0};
t.tm_isdst = -1; // Requests that mktime determine summer time effect.
t.tm_mday = d;
t.tm_mon = m - 1;
t.tm_year = y - 1900;
_t = mktime (&t);
}
////////////////////////////////////////////////////////////////////////////////
Date::Date (const int m, const int d, const int y,
const int hr, const int mi, const int se)
{
// Error if not valid.
struct tm t = {0};
t.tm_isdst = -1; // Requests that mktime determine summer time effect.
t.tm_mday = d;
t.tm_mon = m - 1;
t.tm_year = y - 1900;
t.tm_hour = hr;
t.tm_min = mi;
t.tm_sec = se;
_t = mktime (&t);
}
////////////////////////////////////////////////////////////////////////////////
Date::Date (const std::string& input, const std::string& format /* = "m/d/Y" */)
{
// Before parsing according to "format", perhaps this is a relative date?
if (isRelativeDate (input))
return;
// Parse a formatted date.
Nibbler n (input);
#ifdef NIBBLER_FEATURE_DATE
if (n.getDate (format, _t) && n.depleted ())
return;
#endif
// Parse an ISO date.
if (n.getDateISO (_t) && n.depleted ())
return;
// Perhaps it is an epoch date, in string form?
if (isEpoch (input))
return;
throw ::format (STRING_DATE_INVALID_FORMAT, input, format);
}
////////////////////////////////////////////////////////////////////////////////
Date::Date (const Date& rhs)
{
_t = rhs._t;
}
////////////////////////////////////////////////////////////////////////////////
Date::~Date ()
{
}
////////////////////////////////////////////////////////////////////////////////
time_t Date::toEpoch ()
{
return _t;
}
////////////////////////////////////////////////////////////////////////////////
std::string Date::toEpochString ()
{
std::stringstream epoch;
epoch << _t;
return epoch.str ();
}
////////////////////////////////////////////////////////////////////////////////
// 19980119T070000Z = YYYYMMDDThhmmssZ
std::string Date::toISO ()
{
struct tm* t = gmtime (&_t);
std::stringstream iso;
iso << std::setw (4) << std::setfill ('0') << t->tm_year + 1900
<< std::setw (2) << std::setfill ('0') << t->tm_mon + 1
<< std::setw (2) << std::setfill ('0') << t->tm_mday
<< "T"
<< std::setw (2) << std::setfill ('0') << t->tm_hour
<< std::setw (2) << std::setfill ('0') << t->tm_min
<< std::setw (2) << std::setfill ('0') << t->tm_sec
<< "Z";
return iso.str ();
}
////////////////////////////////////////////////////////////////////////////////
double Date::toJulian ()
{
return (_t / 86400.0) + 2440587.5;
}
////////////////////////////////////////////////////////////////////////////////
void Date::toEpoch (time_t& epoch)
{
epoch = _t;
}
////////////////////////////////////////////////////////////////////////////////
void Date::toMDY (int& m, int& d, int& y)
{
struct tm* t = localtime (&_t);
m = t->tm_mon + 1;
d = t->tm_mday;
y = t->tm_year + 1900;
}
////////////////////////////////////////////////////////////////////////////////
const std::string Date::toString (
const std::string& format /*= "m/d/Y" */) const
{
// Making this local copy seems to fix a bug. Remove the local copy and
// you'll see segmentation faults and all kinds of gibberish.
std::string localFormat = format;
char buffer[12];
std::string formatted;
for (unsigned int i = 0; i < localFormat.length (); ++i)
{
int c = localFormat[i];
switch (c)
{
case 'm': sprintf (buffer, "%d", this->month ()); break;
case 'M': sprintf (buffer, "%02d", this->month ()); break;
case 'd': sprintf (buffer, "%d", this->day ()); break;
case 'D': sprintf (buffer, "%02d", this->day ()); break;
case 'y': sprintf (buffer, "%02d", this->year () % 100); break;
case 'Y': sprintf (buffer, "%d", this->year ()); break;
case 'a': sprintf (buffer, "%.3s", Date::dayName (dayOfWeek ()).c_str ()); break;
case 'A': sprintf (buffer, "%.10s", Date::dayName (dayOfWeek ()).c_str ()); break;
case 'b': sprintf (buffer, "%.3s", Date::monthName (month ()).c_str ()); break;
case 'B': sprintf (buffer, "%.10s", Date::monthName (month ()).c_str ()); break;
case 'v': sprintf (buffer, "%d", Date::weekOfYear (Date::dayOfWeek (context.config.get ("weekstart")))); break;
case 'V': sprintf (buffer, "%02d", Date::weekOfYear (Date::dayOfWeek (context.config.get ("weekstart")))); break;
case 'h': sprintf (buffer, "%d", this->hour ()); break;
case 'H': sprintf (buffer, "%02d", this->hour ()); break;
case 'n': sprintf (buffer, "%d", this->minute ()); break;
case 'N': sprintf (buffer, "%02d", this->minute ()); break;
case 's': sprintf (buffer, "%d", this->second ()); break;
case 'S': sprintf (buffer, "%02d", this->second ()); break;
case 'j': sprintf (buffer, "%d", this->dayOfYear ()); break;
case 'J': sprintf (buffer, "%03d", this->dayOfYear ()); break;
default: sprintf (buffer, "%c", c); break;
}
formatted += buffer;
}
return formatted;
}
////////////////////////////////////////////////////////////////////////////////
Date Date::startOfDay () const
{
return Date (month (), day (), year (), 0, 0, 0);
}
////////////////////////////////////////////////////////////////////////////////
Date Date::startOfWeek () const
{
Date sow (_t);
sow -= (dayOfWeek () * 86400);
return Date (sow.month (), sow.day (), sow.year (), 0, 0, 0);
}
////////////////////////////////////////////////////////////////////////////////
Date Date::startOfMonth () const
{
return Date (month (), 1, year (), 0, 0, 0);
}
////////////////////////////////////////////////////////////////////////////////
Date Date::startOfYear () const
{
return Date (1, 1, year (), 0, 0, 0);
}
////////////////////////////////////////////////////////////////////////////////
bool Date::valid (const std::string& input, const std::string& format)
{
try
{
Date test (input, format);
}
catch (...)
{
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::valid (const int m, const int d, const int y, const int hr,
const int mi, const int se)
{
if (hr < 0 || hr > 23)
return false;
if (mi < 0 || mi > 59)
return false;
if (se < 0 || se > 59)
return false;
return Date::valid (m, d, y);
}
////////////////////////////////////////////////////////////////////////////////
bool Date::valid (const int m, const int d, const int y)
{
// Check that the year is valid.
if (y < 0)
return false;
// Check that the month is valid.
if (m < 1 || m > 12)
return false;
// Finally check that the days fall within the acceptable range for this
// month, and whether or not this is a leap year.
if (d < 1 || d > Date::daysInMonth (m, y))
return false;
return true;
}
////////////////////////////////////////////////////////////////////////////////
// Julian
bool Date::valid (const int d, const int y)
{
// Check that the year is valid.
if (y < 0)
return false;
if (d < 1 || d > Date::daysInYear (y))
return false;
return true;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::leapYear (int year)
{
bool ly = false;
// (year % 4 == 0) && (year % 100 !=0) OR
// (year % 400 == 0)
// are leapyears
if (((!(year % 4)) && (year % 100)) || (!(year % 400))) ly = true;
return ly;
}
////////////////////////////////////////////////////////////////////////////////
int Date::daysInMonth (int month, int year)
{
static int days[2][12] =
{
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
return days[Date::leapYear (year) ? 1 : 0][month - 1];
}
////////////////////////////////////////////////////////////////////////////////
int Date::daysInYear (int year)
{
return Date::leapYear (year) ? 366 : 365;
}
////////////////////////////////////////////////////////////////////////////////
std::string Date::monthName (int month)
{
static const char* months[12] =
{
STRING_DATE_JANUARY_LONG,
STRING_DATE_FEBRUARY_LONG,
STRING_DATE_MARCH_LONG,
STRING_DATE_APRIL_LONG,
STRING_DATE_MAY_LONG,
STRING_DATE_JUNE_LONG,
STRING_DATE_JULY_LONG,
STRING_DATE_AUGUST_LONG,
STRING_DATE_SEPTEMBER_LONG,
STRING_DATE_OCTOBER_LONG,
STRING_DATE_NOVEMBER_LONG,
STRING_DATE_DECEMBER_LONG,
};
assert (month > 0);
assert (month <= 12);
return ucFirst (months[month - 1]);
}
////////////////////////////////////////////////////////////////////////////////
void Date::dayName (int dow, std::string& name)
{
static const char* days[7] =
{
STRING_DATE_SUNDAY_LONG,
STRING_DATE_MONDAY_LONG,
STRING_DATE_TUESDAY_LONG,
STRING_DATE_WEDNESDAY_LONG,
STRING_DATE_THURSDAY_LONG,
STRING_DATE_FRIDAY_LONG,
STRING_DATE_SATURDAY_LONG,
};
name = ucFirst (days[dow]);
}
////////////////////////////////////////////////////////////////////////////////
std::string Date::dayName (int dow)
{
static const char* days[7] =
{
STRING_DATE_SUNDAY_LONG,
STRING_DATE_MONDAY_LONG,
STRING_DATE_TUESDAY_LONG,
STRING_DATE_WEDNESDAY_LONG,
STRING_DATE_THURSDAY_LONG,
STRING_DATE_FRIDAY_LONG,
STRING_DATE_SATURDAY_LONG,
};
return ucFirst (days[dow]);
}
////////////////////////////////////////////////////////////////////////////////
int Date::weekOfYear (int weekStart) const
{
struct tm* t = localtime (&_t);
char weekStr[3];
if (weekStart == 0)
strftime(weekStr, sizeof(weekStr), "%U", t);
else if (weekStart == 1)
strftime(weekStr, sizeof(weekStr), "%V", t);
else
throw std::string (STRING_DATE_BAD_WEEKSTART);
int weekNumber = atoi (weekStr);
if (weekStart == 0)
weekNumber += 1;
return weekNumber;
}
////////////////////////////////////////////////////////////////////////////////
int Date::dayOfWeek () const
{
struct tm* t = localtime (&_t);
return t->tm_wday;
}
////////////////////////////////////////////////////////////////////////////////
int Date::dayOfWeek (const std::string& input)
{
std::string in = lowerCase (input);
if (in == STRING_DATE_SUNDAY_LONG || in == STRING_DATE_SUNDAY_SHORT) return 0;
if (in == STRING_DATE_MONDAY_LONG || in == STRING_DATE_MONDAY_SHORT) return 1;
if (in == STRING_DATE_TUESDAY_LONG || in == STRING_DATE_TUESDAY_SHORT) return 2;
if (in == STRING_DATE_WEDNESDAY_LONG || in == STRING_DATE_WEDNESDAY_SHORT) return 3;
if (in == STRING_DATE_THURSDAY_LONG || in == STRING_DATE_THURSDAY_SHORT) return 4;
if (in == STRING_DATE_FRIDAY_LONG || in == STRING_DATE_FRIDAY_SHORT) return 5;
if (in == STRING_DATE_SATURDAY_LONG || in == STRING_DATE_SATURDAY_SHORT) return 6;
return -1;
}
////////////////////////////////////////////////////////////////////////////////
int Date::dayOfYear () const
{
struct tm* t = localtime (&_t);
return t->tm_yday + 1;
}
////////////////////////////////////////////////////////////////////////////////
int Date::monthOfYear (const std::string& input)
{
std::string in = lowerCase (input);
if (in == STRING_DATE_JANUARY_LONG || in == STRING_DATE_JANUARY_SHORT ) return 1;
if (in == STRING_DATE_FEBRUARY_LONG || in == STRING_DATE_FEBRUARY_SHORT ) return 2;
if (in == STRING_DATE_MARCH_LONG || in == STRING_DATE_MARCH_SHORT ) return 3;
if (in == STRING_DATE_APRIL_LONG || in == STRING_DATE_APRIL_SHORT ) return 4;
if (in == STRING_DATE_MAY_LONG || in == STRING_DATE_MAY_SHORT ) return 5;
if (in == STRING_DATE_JUNE_LONG || in == STRING_DATE_JUNE_SHORT ) return 6;
if (in == STRING_DATE_JULY_LONG || in == STRING_DATE_JULY_SHORT ) return 7;
if (in == STRING_DATE_AUGUST_LONG || in == STRING_DATE_AUGUST_SHORT ) return 8;
if (in == STRING_DATE_SEPTEMBER_LONG || in == STRING_DATE_SEPTEMBER_SHORT) return 9;
if (in == STRING_DATE_OCTOBER_LONG || in == STRING_DATE_OCTOBER_SHORT ) return 10;
if (in == STRING_DATE_NOVEMBER_LONG || in == STRING_DATE_NOVEMBER_SHORT ) return 11;
if (in == STRING_DATE_DECEMBER_LONG || in == STRING_DATE_DECEMBER_SHORT ) return 12;
return -1;
}
////////////////////////////////////////////////////////////////////////////////
int Date::length (const std::string& format)
{
int total = 0;
std::string::const_iterator i;
for (i = format.begin (); i != format.end (); ++i)
{
switch (*i)
{
case 'm':
case 'M':
case 'd':
case 'D':
case 'y':
case 'v':
case 'V':
case 'h':
case 'H':
case 'n':
case 'N':
case 's':
case 'S': total += 2; break;
case 'b':
case 'j':
case 'J':
case 'a': total += 3; break;
case 'Y': total += 4; break;
case 'A':
case 'B': total += 10; break;
// TODO This should be a calculated character width, not necessarily 1.
default: total += 1; break;
}
}
return total;
}
////////////////////////////////////////////////////////////////////////////////
time_t Date::easter (int year)
{
int Y = year;
int a = Y % 19;
int b = Y / 100;
int c = Y % 100;
int d = b / 4;
int e = b % 4;
int f = (b + 8) / 25;
int g = (b - f + 1) / 3;
int h = (19 * a + b - d - g + 15) % 30;
int i = c / 4;
int k = c % 4;
int L = (32 + 2 * e + 2 * i - h - k) % 7;
int m = (a + 11 * h + 22 * L) / 451;
int month = (h + L - 7 * m + 114) / 31;
int day = ((h + L - 7 * m + 114) % 31) + 1;
struct tm t = {0};
t.tm_isdst = -1; // Requests that mktime determine summer time effect.
t.tm_mday = day;
t.tm_mon = month - 1;
t.tm_year = year - 1900;
return mktime (&t);
}
////////////////////////////////////////////////////////////////////////////////
int Date::month () const
{
struct tm* t = localtime (&_t);
return t->tm_mon + 1;
}
////////////////////////////////////////////////////////////////////////////////
int Date::week () const
{
return Date::weekOfYear (Date::dayOfWeek (context.config.get ("weekstart")));
}
////////////////////////////////////////////////////////////////////////////////
int Date::day () const
{
struct tm* t = localtime (&_t);
return t->tm_mday;
}
////////////////////////////////////////////////////////////////////////////////
int Date::year () const
{
struct tm* t = localtime (&_t);
return t->tm_year + 1900;
}
////////////////////////////////////////////////////////////////////////////////
int Date::hour () const
{
struct tm* t = localtime (&_t);
return t->tm_hour;
}
////////////////////////////////////////////////////////////////////////////////
int Date::minute () const
{
struct tm* t = localtime (&_t);
return t->tm_min;
}
////////////////////////////////////////////////////////////////////////////////
int Date::second () const
{
struct tm* t = localtime (&_t);
return t->tm_sec;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::operator== (const Date& rhs) const
{
return rhs._t == _t;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::operator!= (const Date& rhs) const
{
return rhs._t != _t;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::operator< (const Date& rhs) const
{
return _t < rhs._t;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::operator> (const Date& rhs) const
{
return _t > rhs._t;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::operator<= (const Date& rhs) const
{
return _t <= rhs._t;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::operator>= (const Date& rhs) const
{
return _t >= rhs._t;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::sameHour (const Date& rhs) const
{
if (this->year () == rhs.year () &&
this->month () == rhs.month () &&
this->day () == rhs.day () &&
this->hour () == rhs.hour ())
return true;
return false;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::sameDay (const Date& rhs) const
{
if (this->year () == rhs.year () &&
this->month () == rhs.month () &&
this->day () == rhs.day ())
return true;
return false;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::sameWeek (const Date& rhs) const
{
if (this->year () == rhs.year () &&
this->week () == rhs.week ())
return true;
return false;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::sameMonth (const Date& rhs) const
{
if (this->year () == rhs.year () &&
this->month () == rhs.month ())
return true;
return false;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::sameYear (const Date& rhs) const
{
if (this->year () == rhs.year ())
return true;
return false;
}
////////////////////////////////////////////////////////////////////////////////
Date Date::operator- (const int delta)
{
return Date (_t - delta);
}
////////////////////////////////////////////////////////////////////////////////
Date Date::operator+ (const int delta)
{
return Date (_t + delta);
}
////////////////////////////////////////////////////////////////////////////////
Date& Date::operator+= (const int delta)
{
_t += (time_t) delta;
return *this;
}
////////////////////////////////////////////////////////////////////////////////
Date& Date::operator-= (const int delta)
{
_t -= (time_t) delta;
return *this;
}
////////////////////////////////////////////////////////////////////////////////
time_t Date::operator- (const Date& rhs)
{
return _t - rhs._t;
}
////////////////////////////////////////////////////////////////////////////////
// Prefix decrement by one day.
void Date::operator-- ()
{
Date yesterday = startOfDay () - 1;
yesterday = Date (yesterday.month (),
yesterday.day (),
yesterday.year (),
hour (),
minute (),
second ());
_t = yesterday._t;
}
////////////////////////////////////////////////////////////////////////////////
// Postfix decrement by one day.
void Date::operator-- (int)
{
Date yesterday = startOfDay () - 1;
yesterday = Date (yesterday.month (),
yesterday.day (),
yesterday.year (),
hour (),
minute (),
second ());
_t = yesterday._t;
}
////////////////////////////////////////////////////////////////////////////////
// Prefix increment by one day.
void Date::operator++ ()
{
Date tomorrow = (startOfDay () + 90001).startOfDay ();
tomorrow = Date (tomorrow.month (),
tomorrow.day (),
tomorrow.year (),
hour (),
minute (),
second ());
_t = tomorrow._t;
}
////////////////////////////////////////////////////////////////////////////////
// Postfix increment by one day.
void Date::operator++ (int)
{
Date tomorrow = (startOfDay () + 90001).startOfDay ();
tomorrow = Date (tomorrow.month (),
tomorrow.day (),
tomorrow.year (),
hour (),
minute (),
second ());
_t = tomorrow._t;
}
////////////////////////////////////////////////////////////////////////////////
bool Date::isEpoch (const std::string& input)
{
if (digitsOnly (input) &&
input.length () <= 10 )
{
_t = (time_t) atoi (input.c_str ());
return true;
}
return false;
}
////////////////////////////////////////////////////////////////////////////////
// If the input string looks like a relative date, determine that date, set _t
// and return true.
//
// What is a relative date? All of the following should be recognizable, and
// converted to an absolute date:
// wednesday
// fri
// 23rd
// today
// tomorrow
// yesterday
// eow (end of week)
// eom (end of month)
// eoy (end of year)
// now
bool Date::isRelativeDate (const std::string& input)
{
std::string in (lowerCase (input));
Date today;
std::vector <std::string> supported;
for (unsigned int i = 0; i < NUM_RELATIVES; ++i)
supported.push_back (relatives[i]);
// Hard-coded 3, despite rc.abbreviation.minimum.
std::vector <std::string> matches;
if (autoComplete (in, supported, matches, 3) == 1)
{
std::string found = matches[0];
// If day name.
int dow;
if ((dow = Date::dayOfWeek (found)) != -1 ||
found == "eow" ||
found == "eoww" ||
found == "eocw" ||
found == "sow" ||
found == "soww" ||
found == "socw")
{
if (found == "eow" || found == "eoww")
dow = 5;
if (found == "eocw")
dow = (Date::dayOfWeek (context.config.get ("weekstart")) + 6) % 7;
if (found == "sow" || found == "soww")
dow = 1;
if (found == "socw")
dow = Date::dayOfWeek (context.config.get ("weekstart"));
if (today.dayOfWeek () >= dow)
today += (dow - today.dayOfWeek () + 7) * 86400;
else
today += (dow - today.dayOfWeek ()) * 86400;
int m, d, y;
today.toMDY (m, d, y);
Date then (m, d, y);
_t = then._t;
return true;
}
else if (found == "today")
{
Date then (today.month (),
today.day (),
today.year ());
_t = then._t;
return true;
}
else if (found == "tomorrow")
{
Date then (today.month (),
today.day (),
today.year ());
_t = then._t + 86400;
return true;
}
else if (found == "yesterday")
{
Date then (today.month (),
today.day (),
today.year ());
_t = then._t - 86400;
return true;
}
else if (found == "eom" || found == "eocm")
{
Date then (today.month (),
daysInMonth (today.month (), today.year ()),
today.year ());
_t = then._t;
return true;
}
else if (found == "eoq")
{
int eoq_month = today.month () + 2 - (today.month () - 1) % 3;
Date then (eoq_month,
daysInMonth (eoq_month, today.year ()),
today.year ());
_t = then._t;
return true;
}
else if (found == "eoy")
{
Date then (12, 31, today.year ());
_t = then._t;
return true;
}
else if (found == "socm")
{
int m = today.month ();
int y = today.year ();
Date then (m, 1, y);
_t = then._t;
return true;
}
else if (found == "som")
{
int m = today.month () + 1;
int y = today.year ();
if (m > 12)
{
m -=12;
y++;
}
Date then (m, 1, y);
_t = then._t;
return true;
}
else if (found == "soq")
{
int m = today.month () + 3 - (today.month () - 1) % 3;
int y = today.year ();
if (m > 12)
{
m -=12;
y++;
}
Date then (m , 1, y);
_t = then._t;
return true;
}
else if (found == "soy")
{
Date then (1, 1, today.year () + 1);
_t = then._t;
return true;
}
else if (found == "goodfriday")
{
Date then (Date::easter(today.year()));
_t = then._t - 86400*2;
return true;
}
else if (found == "easter")
{
Date then (Date::easter(today.year()));
_t = then._t;
return true;
}
else if (found == "eastermonday")
{
Date then (Date::easter(today.year()));
_t = then._t + 86400;
return true;
}
else if (found == "ascension")
{
Date then (Date::easter(today.year()));
_t = then._t + 86400*39;
return true;
}
else if (found == "pentecost")
{
Date then (Date::easter(today.year()));
_t = then._t + 86400*49;
return true;
}
else if (found == "midsommar")
{
for (int midsommar = 20; midsommar <= 26; midsommar++)
{
Date then (6, midsommar, today.year ());
if (6 == then.dayOfWeek ())
{
_t = then._t;
return true;
}
}
}
else if (found == "midsommarafton")
{
for (int midsommar = 19; midsommar <= 25; midsommar++)
{
Date then (6, midsommar, today.year ());
if (5 == then.dayOfWeek ())
{
_t = then._t;
return true;
}
}
}
else if (found == "now")
{
_t = time (NULL);
return true;
}
else if (found == "later" || found == "someday")
{
Date then (1, 18, 2038);
_t = then._t;
return true;
}
}
// Support "21st" to indicate the next date that is the 21st day.
else if (in.length () <= 4 &&
isdigit (in[0]))
{
int number;
std::string ordinal;
if (isdigit (in[1]))
{
number = atoi (in.substr (0, 2).c_str ());
ordinal = lowerCase (in.substr (2));
}
else
{
number = atoi (in.substr (0, 2).c_str ());
ordinal = lowerCase (in.substr (1));
}
// Sanity check.
if (number <= 31)
{
if (ordinal == "st" ||
ordinal == "nd" ||
ordinal == "rd" ||
ordinal == "th")
{
int m = today.month ();
int d = today.day ();
int y = today.year ();
// If it is this month.
if (d < number &&
number <= Date::daysInMonth (m, y))
{
Date then (m, number, y);
_t = then._t;
return true;
}
do
{
m++;
if (m > 12)
{
m = 1;
y++;
}
}
while (number > Date::daysInMonth (m, y));
Date then (m, number, y);
_t = then._t;
return true;
}
}
}
return false;
}
////////////////////////////////////////////////////////////////////////////////
const std::vector <std::string> Date::get_relatives ()
{
std::vector <std::string> all;
for (unsigned int i = 0; i < NUM_RELATIVES; ++i)
if (strcmp (relatives[i], "-"))
all.push_back (relatives[i]);
return all;
}
////////////////////////////////////////////////////////////////////////////////
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