DateTimeNode.h

/* -*- mode: c++; indent-tabs-mode: nil -*- */
/*
  DateTimeNode.h

  DateTimeNode Class Definition

  Qore Programming Language

  Copyright (C) 2003 - 2014 David Nichols

  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  DEALINGS IN THE SOFTWARE.

  Note that the Qore library is released under a choice of three open-source
  licenses: MIT (as above), LGPL 2+, or GPL 2+; see README-LICENSE for more
  information.
*/

#ifndef _QORE_DATETIMENODE_H

#define _QORE_DATETIMENODE_H

#include <qore/AbstractQoreNode.h>
#include <qore/DateTime.h>

class qore_date_private;

class DateTimeNode : public SimpleValueQoreNode, public DateTime {
private:
   DLLLOCAL DateTimeNode(const DateTime *);

   DLLLOCAL DateTimeNode& operator=(const DateTimeNode &);


   DLLEXPORT virtual bool getAsBoolImpl() const;


   DLLEXPORT virtual int getAsIntImpl() const;


   DLLEXPORT virtual int64 getAsBigIntImpl() const;


   DLLEXPORT virtual double getAsFloatImpl() const;

   DLLLOCAL DateTimeNode(qore_date_private *n_priv);

protected:
   DLLEXPORT virtual ~DateTimeNode();

public:

   DLLEXPORT DateTimeNode(bool r = false);


   DLLEXPORT DateTimeNode(int n_year, int n_month, int n_day, int n_hour = 0, int n_minute = 0, int n_second = 0, short n_ms = 0, bool n_relative = false);


   DLLEXPORT DateTimeNode(int64 seconds);


   DLLEXPORT DateTimeNode(int64 seconds, int ms);


   DLLEXPORT DateTimeNode(const char *date);


   DLLEXPORT DateTimeNode(const AbstractQoreZoneInfo *zone, const char *date);


   DLLEXPORT DateTimeNode(struct tm *tms);

   DLLEXPORT DateTimeNode(const DateTimeNode &dt);

   DLLEXPORT DateTimeNode(const DateTime &dt);


   DLLEXPORT virtual QoreString *getStringRepresentation(bool &del) const;


   DLLEXPORT virtual void getStringRepresentation(QoreString &str) const;


   DLLEXPORT virtual DateTime *getDateTimeRepresentation(bool &del) const;


   DLLEXPORT virtual void getDateTimeRepresentation(DateTime &dt) const;


   DLLEXPORT virtual QoreString *getAsString(bool &del, int foff, ExceptionSink *xsink) const;


   DLLEXPORT virtual int getAsString(QoreString &str, int foff, ExceptionSink *xsink) const;

   DLLEXPORT virtual class AbstractQoreNode *realCopy() const;


   DLLEXPORT virtual bool is_equal_soft(const AbstractQoreNode *v, ExceptionSink *xsink) const;
   DLLEXPORT virtual bool is_equal_hard(const AbstractQoreNode *v, ExceptionSink *xsink) const;

   DLLEXPORT virtual const char *getTypeName() const;


   DLLEXPORT DateTimeNode *copy() const;


   DLLEXPORT DateTimeNode *add(const DateTime *dt) const;


   DLLEXPORT DateTimeNode *subtractBy(const DateTime *dt) const;

   DLLEXPORT DateTimeNode *unaryMinus() const;

   DLLLOCAL static const char *getStaticTypeName() {
      return "date";
   }

   DLLLOCAL static qore_type_t getStaticTypeCode() {
      return NT_DATE;
   }


   DLLEXPORT static DateTimeNode *getDateFromISOWeek(int year, int week, int day, ExceptionSink *xsink);

   DLLEXPORT static DateTimeNode *makeAbsolute(const AbstractQoreZoneInfo *n_zone, int n_year, int n_month, int n_day, int n_hour = 0, int n_minute = 0, int n_second = 0, int n_us = 0);


   DLLEXPORT static DateTimeNode *makeAbsolute(const AbstractQoreZoneInfo *zone, int64 seconds, int us = 0);


   DLLEXPORT static DateTimeNode *makeAbsoluteLocal(const AbstractQoreZoneInfo *zone, int64 seconds, int us = 0);

   DLLEXPORT static DateTimeNode *makeRelative(int n_year, int n_month, int n_day, int n_hour = 0, int n_minute = 0, int n_second = 0, int n_us = 0);
};

DLLEXPORT extern DateTimeNode *ZeroDate;


class DateTimeValueHelper {
private:
   const DateTime *dt;
   bool del;

   DLLLOCAL DateTimeValueHelper(const DateTimeValueHelper&); // not implemented
   DLLLOCAL DateTimeValueHelper& operator=(const DateTimeValueHelper&); // not implemented
   DLLLOCAL void *operator new(size_t); // not implemented, make sure it is not new'ed

public:
   DLLLOCAL DateTimeValueHelper(const AbstractQoreNode *n) {
      // optmization without virtual function call for most common case
      if (n) {
         if (n->getType() == NT_DATE) {
            dt = reinterpret_cast<const DateTimeNode *>(n);
            del = false;
         }
         else
            dt = n->getDateTimeRepresentation(del);
      }
      else {
         dt = ZeroDate;
         del = false;
      }
   }

   DLLLOCAL ~DateTimeValueHelper() {
      if (del)
         delete const_cast<DateTime *>(dt);
   }
   DLLLOCAL const DateTime *operator->() { return dt; }
   DLLLOCAL const DateTime *operator*() { return dt; }
};


class DateTimeNodeValueHelper {
private:
   DateTimeNode *dt;
   bool temp;

   DLLLOCAL DateTimeNodeValueHelper(const DateTimeNodeValueHelper&); // not implemented
   DLLLOCAL DateTimeNodeValueHelper& operator=(const DateTimeNodeValueHelper&); // not implemented
   DLLLOCAL void *operator new(size_t); // not implemented, make sure it is not new'ed

public:
   DLLLOCAL DateTimeNodeValueHelper(const AbstractQoreNode *n) {
      if (!n) {
         dt = ZeroDate;
         temp = false;
         return;
      }

      // optmization without virtual function call for most common case
      if (n->getType() == NT_DATE) {
         dt = const_cast<DateTimeNode *>(reinterpret_cast<const DateTimeNode *>(n));
         temp = false;
         return;
      }

      dt = new DateTimeNode();
      n->getDateTimeRepresentation(*dt);
      temp = true;
   }

   DLLLOCAL ~DateTimeNodeValueHelper() {
      if (dt && temp)
         dt->deref();
   }

   DLLLOCAL const DateTimeNode *operator->() { return dt; }
   DLLLOCAL const DateTimeNode *operator*() { return dt; }


   DLLLOCAL DateTimeNode *getReferencedValue() {
      if (temp)
         temp = false;
      else if (dt)
         dt->ref();
      return dt;
   }
};

#endif