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/*
* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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.
*/
/**
* @addtogroup util
*/
/**
* @file times.h
* @author John Wiegley
*
* @ingroup util
*
* @brief datetime_t and date_t objects
*/
#ifndef _TIMES_H
#define _TIMES_H
namespace ledger {
DECLARE_EXCEPTION(datetime_error, std::runtime_error);
DECLARE_EXCEPTION(date_error, std::runtime_error);
typedef boost::posix_time::ptime datetime_t;
typedef datetime_t::time_duration_type time_duration_t;
inline bool is_valid(const datetime_t& moment) {
return ! moment.is_not_a_date_time();
}
typedef boost::gregorian::date date_t;
typedef boost::gregorian::date_duration date_duration_t;
inline bool is_valid(const date_t& moment) {
return ! moment.is_not_a_date();
}
extern const datetime_t& current_time;
extern const date_t& current_date;
extern int current_year;
extern optional<string> input_date_format;
extern string output_date_format;
datetime_t parse_datetime(const char * str);
inline datetime_t parse_datetime(const string& str) {
return parse_datetime(str.c_str());
}
date_t parse_date(const char * str);
inline date_t parse_date(const string& str) {
return parse_date(str.c_str());
}
inline std::time_t to_time_t(const ptime& t)
{
if( t == posix_time::neg_infin )
return 0;
else if( t == posix_time::pos_infin )
return LONG_MAX;
ptime start(date(1970,1,1));
return (t-start).total_seconds();
}
inline string format_datetime(const datetime_t& when)
{
char buf[256];
time_t moment = to_time_t(when);
std::strftime(buf, 255, (output_date_format + " %H:%M:%S").c_str(),
std::localtime(&moment));
return buf;
}
inline string format_date(const date_t& when,
const optional<string>& format = none)
{
if (format || ! output_date_format.empty()) {
char buf[256];
std::tm moment = gregorian::to_tm(when);
std::strftime(buf, 255, format ?
format->c_str() : output_date_format.c_str(), &moment);
return buf;
} else {
return to_simple_string(when).substr(2);
}
}
struct interval_t
{
int years;
int months;
int days;
date_t begin;
date_t end;
mutable bool advanced;
interval_t(int _days = 0, int _months = 0, int _years = 0,
const date_t& _begin = date_t(),
const date_t& _end = date_t())
: years(_years), months(_months), days(_days),
begin(_begin), end(_end), advanced(false) {
TRACE_CTOR(interval_t, "int, int, int, const date_t&, const date_t&");
}
interval_t(const interval_t& other)
: years(other.years),
months(other.months),
days(other.days),
begin(other.begin),
end(other.end),
advanced(other.advanced) {
TRACE_CTOR(interval_t, "copy");
}
interval_t(const string& desc)
: years(0), months(0), days(0), begin(), end(), advanced(false) {
TRACE_CTOR(interval_t, "const string&");
std::istringstream stream(desc);
parse(stream);
}
~interval_t() throw() {
TRACE_DTOR(interval_t);
}
operator bool() const {
return years != 0 || months != 0 || days != 0;
}
void set_start(const date_t& moment) {
begin = moment;
}
date_t first(const optional<date_t>& moment = none) const;
date_t increment(const date_t&) const;
void parse(std::istream& in);
};
} // namespace ledger
#endif // _TIMES_H
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