GncDateTime Class Reference

GnuCash DateTime class. More...

#include <gnc-datetime.hpp>

Public Member Functions
	GncDateTime ()
	Construct a GncDateTime representing the current time in the current timezone.
	GncDateTime (const time64 time)
	Construct a GncDateTime in the current timezone representing the timestamp as seconds from the POSIX epoch (1970-01-01T00:00:00UTC). More...
	GncDateTime (const struct tm tm)
	Construct a GncDateTime in the current timezone representing the standard struct tm provided. More...
	GncDateTime (const GncDate &date, DayPart part=DayPart::neutral)
	Construct a GncDateTime from a GncDate. More...
	GncDateTime (const std::string &str)
	Construct a GncDateTime. More...
	GncDateTime (const char *str)
void	now ()
	Set the GncDateTime to the date and time indicated in the computer's clock.
	operator time64 () const
	Cast the GncDateTime to a time64, seconds from the POSIX epoch. More...
	operator struct tm () const
	Cast the GncDateTime to a struct tm. More...
long	offset () const
	Obtain the UTC offset in seconds. More...
struct tm	utc_tm () const
	Obtain a struct tm representing the time in UTC. More...
GncDate	date () const
	Obtain the date from the time, as a GncDate, in the current timezone. More...
bool	isnull (void)
	Test if the GncDateTime has a member pointer. More...
std::string	format (const char *format) const
	Format the GncDateTime into a std::string. More...
std::string	format_zulu (const char *format) const
	Format the GncDateTime into a std::string in GMT. More...
std::string	format_iso8601 () const
	Format the GncDateTime into a gnucash-style iso8601 string in UTC. More...

Static Public Member Functions
static std::string	timestamp ()
	Get an undelimited string representing the current date and time. More...

Detailed Description

GnuCash DateTime class.

Represents local time in the current timezone. As with GncDate, the represented time is limited to the period between 1400 and 9999 CE.

Be careful when using times: A particular time is represented differently depending on the timezone, which can shift the displayed date. Accounting is generally not sensitive to the time of day, but is sensitive to the recorded day. Since GncDates are not timezone dependent they should be preferred for accounting entries.

Definition at line 70 of file gnc-datetime.hpp.

Constructor & Destructor Documentation

GncDateTime() [1/4]

GncDateTime::GncDateTime

(

const time64

time

)

Construct a GncDateTime in the current timezone representing the timestamp as seconds from the POSIX epoch (1970-01-01T00:00:00UTC).

Parameters

time	Seconds from the POSIX epoch.

Exceptions

std::invalid_argument

if the year is outside the constraints.

Definition at line 788 of file gnc-datetime.cpp.

                                          :
    m_impl(new GncDateTimeImpl(time)) {}

GncDateTime() [2/4]

GncDateTime::GncDateTime

(

const struct tm

tm

)

Construct a GncDateTime in the current timezone representing the standard struct tm provided.

Parameters

tm	A C-standard struct tm representing the date and time. Note that the timezone and offset are ignored on those systems which include them in struct tm.

Exceptions

std::invalid_argument

if the year is outside the constraints.

GncDateTime() [3/4]

GncDateTime::GncDateTime	(	const GncDate &	date,
		DayPart	part = DayPart::neutral
	)

Construct a GncDateTime from a GncDate.

As a GncDate doesn't contain time information, the time will be set depending on the second parameter to start of day, neutral or end of day.

Parameters

date

A GncDate representing a date.

part

An optinoal DayPart indicating which time to use in the conversion. This can be "DayPart::start" for start of day (00:00 local time), "DayPart::neutral" for a neutral time (10:59 UTC, chosen to have the least chance of date changes when crossing timezone borders), "DayPart::end" for end of day (23:59 local time). If omitted part defaults to DayPart::neutral. Note the different timezone used for DayPart::neutral compared to the other two options!

Exceptions

std::invalid_argument

if the year is outside the constraints.

Definition at line 798 of file gnc-datetime.cpp.

                                                          :
    m_impl(new GncDateTimeImpl(*(date.m_impl), part)) {}

GncDateTime() [4/4]

GncDateTime::GncDateTime

(

const std::string &

str

)

Construct a GncDateTime.

Parameters

str	A string representing the date and time in some recognizable format. Note that if a timezone is not specified the default is UTC, not the local one.

Exceptions

std::invalid_argument

if the year is outside the constraints.

Definition at line 792 of file gnc-datetime.cpp.

                                             :
    m_impl(new GncDateTimeImpl(str)) {}

Member Function Documentation

date()

GncDate GncDateTime::date

(

)

const

Obtain the date from the time, as a GncDate, in the current timezone.

Returns

GncDate represented by the GncDateTime.

Definition at line 830 of file gnc-datetime.cpp.

{
    return GncDate(m_impl->date());
}

format()

std::string GncDateTime::format

(

const char *

format

)

const

Format the GncDateTime into a std::string.

Parameters

format

A cstr describing the way the date and time are presented. Code letters preceded with % stand in for arguments; most are the same as described in strftime(3), but there are a few differences. Consult the boost::date_time documentation.

Returns

a std::string containing a representation of the date and time in the locale's time zone according to the format.

Definition at line 836 of file gnc-datetime.cpp.

{
    return m_impl->format(format);
}

format_iso8601()

std::string GncDateTime::format_iso8601

(

)

const

Format the GncDateTime into a gnucash-style iso8601 string in UTC.

Returns

a std::string in the format YYYY-MM-DD HH:MM:SS.

Definition at line 848 of file gnc-datetime.cpp.

{
    return m_impl->format_iso8601();
}

format_zulu()

std::string GncDateTime::format_zulu

(

const char *

format

)

const

Format the GncDateTime into a std::string in GMT.

Parameters

format

A cstr describing the way the date and time are presented. Code letters preceded with % stand in for arguments; most are the same as described in strftime(3), but there are a few differences. Consult the boost::date_time documentation.

Returns

a std::string containing a representation of the date and time in GMT (timezone Z) according to the format.

Definition at line 842 of file gnc-datetime.cpp.

{
    return m_impl->format_zulu(format);
}

isnull()

bool GncDateTime::isnull ( void  )

inline

Test if the GncDateTime has a member pointer.

Testing only.

Definition at line 137 of file gnc-datetime.hpp.

{ return m_impl == nullptr; }

offset()

long GncDateTime::offset

(

)

const

Obtain the UTC offset in seconds.

Returns

seconds difference between this local time and UTC. West is negative.

Definition at line 818 of file gnc-datetime.cpp.

{
    return m_impl->offset();
}

operator struct tm()

GncDateTime::operator struct tm ( ) const

explicit

Cast the GncDateTime to a struct tm.

Timezone field isn't filled.

Definition at line 812 of file gnc-datetime.cpp.

{
    return m_impl->operator struct tm();
}

operator time64()

GncDateTime::operator time64 ( ) const

explicit

Cast the GncDateTime to a time64, seconds from the POSIX epoch.

Definition at line 807 of file gnc-datetime.cpp.

{
    return m_impl->operator time64();
}

timestamp()

std::string GncDateTime::timestamp ( )

static

Get an undelimited string representing the current date and time.

Returns

a std::string in the format YYYYMMDDHHMMSS.

Definition at line 854 of file gnc-datetime.cpp.

{
    return GncDateTimeImpl::timestamp();
}

utc_tm()

struct tm GncDateTime::utc_tm

(

)

const

Obtain a struct tm representing the time in UTC.

Returns

struct tm

Definition at line 824 of file gnc-datetime.cpp.

{
    return m_impl->utc_tm();
}

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The documentation for this class was generated from the following files:

• gnc-datetime.hpp
• gnc-datetime.cpp