xref: /haiku/docs/user/locale/TimeFormat.dox (revision 4a31c3262018a36b9c920caca1be0034d6836923)

/*
 * Copyright 2011-2014 Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Adrien Destugues, pulkomandy@pulkomandy.ath.cx
 *		John Scipione, jscipione@gmail.com
 *
 * Corresponds to:
 *		headers/os/locale/DateFormat.h	hrev48439
 *		src/kits/locale/DateFormat.cpp	hrev48439
 */


/*!
	\file DateFormat.h
	\ingroup locale
	\ingroup libbe
	\brief Contains BTimeFormat class, a date formatter.
*/


/*!
	\class BTimeFormat
	\ingroup locale
	\ingroup libbe
	\brief Formatter for dates.

	\since Haiku R1
*/


/*!
	\fn BTimeFormat::BTimeFormat()
	\brief Constructor.
*/


/*!
	\fn BTimeFormat::BTimeFormat(const BLanguage& language,
		const BFormattingConventions& format);
	\brief Language and formatting convention constructor.

	\param language The \a language to use.
	\param format The formatting convention to use.
*/


/*!
	\fn BTimeFormat::BTimeFormat(const BTimeFormat& other)
	\brief Copy Constructor.

	\param other The BTimeFormat object to copy from.

	\since Haiku R1
*/


/*!
	\fn BTimeFormat::~BTimeFormat()
	\brief Destructor.

	\since Haiku R1
*/


/*!
	\fn ssize_t BTimeFormat::Format(char* string, size_t maxSize, time_t time,
		BTimeFormatStyle style) const
	\brief Fills in \a string with a formatted date up to \a maxSize bytes for
	       the given \a time and \a style for the locale.

	\param string The string buffer to fill with the formatted time.
	\param maxSize The size of the buffer.
	\param time The time (in seconds since epoch) to format
	\param style Specify the long format or the short format.

	\returns The number of bytes written during the time formatting.
	\retval B_ERROR Unable to lock the BLocale.
	\retval B_NO_MEMORY Ran out of memory while creating the DateFormat object.
	\retval B_BAD_VALUE CheckedArrayByteSink overflowed.

	\since Haiku R1
*/


/*!
	\fn status_t BTimeFormat::Format(char* string, size_t maxSize,
		time_t time, BTimeFormatStyle style) const
	\brief Fills in \a string with a formatted time for the given
	       \a time, \a style, and \a timeZone for the locale.

	\param string The string buffer to fill with the formatted date.
	\param time The time (in seconds since epoch) to format
	\param style Specify the long format or the short format.

	\returns A status code.
	\retval B_OK Everything went fine.
	\retval B_ERROR Unable to lock the BLocale.
	\retval B_NO_MEMORY Ran out of memory while creating the DateFormat object.

	\sa BLocale::FormatDate(BString *string, time_t time,
		BTimeFormatStyle style, const BTimeZone* timeZone) const
	\sa BLocale::FormatDateTime(BString* target, time_t time,
		BTimeFormatStyle dateStyle, BTimeFormatStyle timeStyle,
		const BTimeZone* timeZone) const

	\since Haiku R1
*/


/*!
	\fn status_t BTimeFormat::Format(BString& string, const time_t time,
		const BTimeFormatStyle style, const BTimeZone* timeZone) const
	\brief Fills in \a string with a formatted time for the given
	       \a time and \a style for the locale.

	\param string The string buffer to fill with the formatted time.
	\param time The time (in seconds since epoch) to format.
	\param style Specify the long format or the short format.
	\param timeZone The time zone to use, if \c NULL, uses the one set by the
	       locale.

	\returns A status code.
	\retval B_OK Everything went fine.
	\retval B_ERROR Unable to lock the BLocale.
	\retval B_NO_MEMORY Ran out of memory while creating the DateFormat object.
	\retval B_BAD_VALUE An error occurred during time formatting.

	\since Haiku R1
*/


/*!
	\fn status_t BTimeFormat::Format(BString& string,
		int*& fieldPositions, int& fieldCount,
		time_t time, BTimeFormatStyle style) const
	\brief Fills in \a string with a formatted time for the given parameters.

	\param string The string buffer to fill with the formatted date.
	\param fieldPositions An array of date field positions to use.
	\param fieldCount The number of \a fields in \a fieldPositions.
	\param time The time (in seconds since epoch) to format
	\param style Specify the long format (with day name, full
		month name) or the short format, 08/12/2010 or similar.

	\returns A status code.
	\retval B_OK Everything went fine.
	\retval B_ERROR Unable to lock the BLocale.
	\retval B_NO_MEMORY Ran out of memory while creating the DateFormat object.
	\retval B_BAD_VALUE An error occurred while performing the date formatting.

	\since Haiku R1
*/


/*!
	\fn status_t BTimeFormat::GetTimeFields(BDateElement*& fields, int& fieldCount,
		BTimeFormatStyle style) const
	\brief Get the type of each field in the time format of the locale.

	This method is used most often in combination with FormatTime().
	FormatTime() gives you the offset of each field in a formatted string,
	and GetTimeFields() gives you the type of the field at a given offset.
	With this information you can handle the formatted date string as
	a list of fields that you can split and alter at will.

	\param fields Pointer to the fields object.
	\param fieldCount The number of fields.
	\param style Specify the long format or the short format.

	\returns A status code.
	\retval B_OK Everything went fine.
	\retval B_ERROR Unable to lock the BLocale.
	\retval B_NO_MEMORY Ran out of memory while creating the DateFormat object.
	\retval B_BAD_VALUE An error occurred while getting the time fields.

	\since Haiku R1
*/