datetimeparser.h

来自「This software aims to create an applet a」· C头文件 代码 · 共 122 行

//
// DateTimeParser.h
//
// $Id: //poco/Main/Foundation/include/Foundation/DateTimeParser.h#5 $
//
// Definition of the DateTimeParser class.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// 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.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// 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.
//


#ifndef Foundation_DateTimeParser_INCLUDED
#define Foundation_DateTimeParser_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef Foundation_DateTime_INCLUDED
#include "Foundation/DateTime.h"
#endif


Foundation_BEGIN


class Foundation_API DateTimeParser
	/// This class provides a method for parsing dates and times
	/// from strings. All parsing methods do their best to
	/// parse a meaningful result, even from malformed input
	/// strings.
	///
	/// Note: When parsing a time in 12-hour (AM/PM) format, the hour
	/// (%h) must be parsed before the AM/PM designator (%a, %A),
	/// otherwise the AM/PM designator will be ignored.
{
public:
	static void parse(const std::string& fmt, const std::string& str, DateTime& dateTime, int& timeZoneDifferential);
		/// Parses a date and time in the given format from the given string.
		/// Throws a SyntaxException if the string cannot be successfully parsed.
		/// Please see DateTimeFormatter::format() for a description of the format string.
		/// Class DateTimeFormat defines format strings for various standard date/time formats.

	static DateTime parse(const std::string& fmt, const std::string& str, int& timeZoneDifferential);
		/// Parses a date and time in the given format from the given string.
		/// Throws a SyntaxException if the string cannot be successfully parsed.
		/// Please see DateTimeFormatter::format() for a description of the format string.
		/// Class DateTimeFormat defines format strings for various standard date/time formats.
		
	static bool tryParse(const std::string& fmt, const std::string& str, DateTime& dateTime, int& timeZoneDifferential);
		/// Parses a date and time in the given format from the given string.
		/// Returns true if the string has been successfully parsed, false otherwise.
		/// Please see DateTimeFormatter::format() for a description of the format string.
		/// Class DateTimeFormat defines format strings for various standard date/time formats.
		
	static void parse(const std::string& str, DateTime& dateTime, int& timeZoneDifferential);
		/// Parses a date and time from the given dateTime string. Before parsing, the method
		/// examines the dateTime string for a known date/time format.
		/// Throws a SyntaxException if the string cannot be successfully parsed.
		/// Please see DateTimeFormatter::format() for a description of the format string.
		/// Class DateTimeFormat defines format strings for various standard date/time formats.

	static DateTime parse(const std::string& str, int& timeZoneDifferential);
		/// Parses a date and time from the given dateTime string. Before parsing, the method
		/// examines the dateTime string for a known date/time format.
		/// Please see DateTimeFormatter::format() for a description of the format string.
		/// Class DateTimeFormat defines format strings for various standard date/time formats.
		
	static bool tryParse(const std::string& str, DateTime& dateTime, int& timeZoneDifferential);
		/// Parses a date and time from the given dateTime string. Before parsing, the method
		/// examines the dateTime string for a known date/time format.
		/// Please see DateTimeFormatter::format() for a description of the format string.
		/// Class DateTimeFormat defines format strings for various standard date/time formats.

protected:
	static int parseTZD(std::string::const_iterator& it, std::string::const_iterator& end);
	static int parseMonth(std::string::const_iterator& it, std::string::const_iterator& end);
	static int parseAMPM(std::string::const_iterator& it, std::string::const_iterator& end, int hour);
};


Foundation_END


#endif // Foundation_DateTimeParser_INCLUDED