XMLDateTime.cpp

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  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. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache\@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * $Id$
 * $Log$
 * Revision 1.10  2003/05/15 19:07:46  knoaman
 * Partial implementation of the configurable memory manager.
 *
 * Revision 1.9  2003/05/15 16:32:19  gareth
 * We did not allow dateTimes with a timezone due to the last seconds fix.
 *
 * Revision 1.8  2003/03/23 22:54:49  peiyongz
 * invalid second values
 *
 * Revision 1.7  2003/02/22 22:49:09  peiyongz
 * Schema Errata E2-45 24:00:00 allowed
 *
 * Revision 1.6  2003/02/02 23:54:43  peiyongz
 * getFormattedString() added to return original and converted value.
 *
 * Revision 1.5  2003/01/30 21:55:22  tng
 * Performance: create getRawData which is similar to toString but return the internal data directly, user is not required to delete the returned memory.
 *
 * Revision 1.4  2002/11/28 20:39:27  peiyongz
 * Schema Errata: E2-23 seconds part shall have at least one digit after the dot
 *                           if it appears.
 *
 * Revision 1.3  2002/11/06 22:22:21  peiyongz
 * Schema-Errata: E2-12: gMonth
 *
 * Revision 1.2  2002/11/04 15:22:05  tng
 * C++ Namespace Support.
 *
 * Revision 1.1.1.1  2002/02/01 22:22:14  peiyongz
 * sane_include
 *
 * Revision 1.4  2001/11/14 22:04:03  peiyongz
 * Patch to apply check on Year and more rigorous on other fields as well.
 *
 * Revision 1.3  2001/11/12 20:36:54  peiyongz
 * SchemaDateTimeException defined
 *
 * Revision 1.2  2001/11/09 20:41:45  peiyongz
 * Fix: compilation error on Solaris and AIX.
 *
 * Revision 1.1  2001/11/07 19:16:03  peiyongz
 * DateTime Port
 *
 *
 */

// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <stdlib.h>
#include <xercesc/util/XMLDateTime.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/util/XMLUni.hpp>
#include <xercesc/util/Janitor.hpp>

XERCES_CPP_NAMESPACE_BEGIN

//
// constants used to process raw data (fBuffer)
//
// [-]{CCYY-MM-DD}'T'{HH:MM:SS.MS}['Z']
//                                [{+|-}hh:mm']
//

static const XMLCh DURATION_STARTER     = chLatin_P;              // 'P'
static const XMLCh DURATION_Y           = chLatin_Y;              // 'Y'
static const XMLCh DURATION_M           = chLatin_M;              // 'M'
static const XMLCh DURATION_D           = chLatin_D;              // 'D'
static const XMLCh DURATION_H           = chLatin_H;              // 'H'
static const XMLCh DURATION_S           = chLatin_S;              // 'S'

static const XMLCh DATE_SEPARATOR       = chDash;                 // '-'
static const XMLCh TIME_SEPARATOR       = chColon;                // ':'
static const XMLCh TIMEZONE_SEPARATOR   = chColon;                // ':'
static const XMLCh DATETIME_SEPARATOR   = chLatin_T;              // 'T'
static const XMLCh MILISECOND_SEPARATOR = chPeriod;               // '.'

static const XMLCh UTC_STD_CHAR         = chLatin_Z;              // 'Z'
static const XMLCh UTC_POS_CHAR         = chPlus;                 // '+'
static const XMLCh UTC_NEG_CHAR         = chDash;                 // '-'

static const XMLCh UTC_SET[]            = {UTC_STD_CHAR           //"Z+-"
                                         , UTC_POS_CHAR
                                         , UTC_NEG_CHAR
                                         , chNull};

static const int YMD_MIN_SIZE    = 10;   // CCYY-MM-DD
static const int YMONTH_MIN_SIZE = 7;    // CCYY_MM
static const int TIME_MIN_SIZE   = 8;    // hh:mm:ss
static const int TIMEZONE_SIZE   = 5;    // hh:mm
static const int DAY_SIZE        = 5;    // ---DD
//static const int MONTH_SIZE      = 6;    // --MM--
static const int MONTHDAY_SIZE   = 7;    // --MM-DD
static const int NOT_FOUND       = -1;

//define constants to be used in assigning default values for
//all date/time excluding duration
static const int YEAR_DEFAULT  = 2000;
static const int MONTH_DEFAULT = 01;
static const int DAY_DEFAULT   = 15;

// order-relation on duration is a partial order. The dates below are used to
// for comparison of 2 durations, based on the fact that
// duration x and y is x<=y iff s+x<=s+y
// see 3.2.6 duration W3C schema datatype specs
//
// the dates are in format: {CCYY,MM,DD, H, S, M, MS, timezone}
static const int DATETIMES[][XMLDateTime::TOTAL_SIZE] =
{
    {1696, 9, 1, 0, 0, 0, 0, XMLDateTime::UTC_STD},
	{1697, 2, 1, 0, 0, 0, 0, XMLDateTime::UTC_STD},
	{1903, 3, 1, 0, 0, 0, 0, XMLDateTime::UTC_STD},
	{1903, 7, 1, 0, 0, 0, 0, XMLDateTime::UTC_STD}
};

// ---------------------------------------------------------------------------
//  local methods
// ---------------------------------------------------------------------------
static inline int fQuotient(int a, int b)
{
    div_t div_result = div(a, b);
    return div_result.quot;
}

static inline int fQuotient(int temp, int low, int high)
{
    return fQuotient(temp - low, high - low);
}

static inline int mod(int a, int b, int quotient)
{
	return (a - quotient*b) ;
}

static inline int modulo (int temp, int low, int high)
{
    //modulo(a - low, high - low) + low
    int a = temp - low;
    int b = high - low;
    return (mod (a, b, fQuotient(a, b)) + low) ;
}