DateTimeNode.h

/* -*- mode: c++; indent-tabs-mode: nil -*- */
/*
    DateTimeNode.h
 
    DateTimeNode Class Definition
 
    Qore Programming Language
 
    Copyright (C) 2003 - 2023 Qore Technologies, s.r.o.
 
    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>
 
DLLEXPORT const AbstractQoreZoneInfo* currentTZ();
 
class qore_date_private;
class LocalVar;
 
class DateTimeNode : public SimpleValueQoreNode, public DateTime {
private:
    DLLLOCAL DateTimeNode(const DateTime*) = delete;
 
    DLLLOCAL DateTimeNode& operator=(const DateTimeNode&) = delete;
 
 
    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 explicit DateTimeNode(const AbstractQoreZoneInfo* zone, const QoreValue v);
 
 
    DLLEXPORT explicit DateTimeNode(const QoreValue v);
 
 
    DLLEXPORT DateTimeNode(const char* date);
 
 
    DLLEXPORT DateTimeNode(const char* date, ExceptionSink* xsink);
 
 
    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 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* add(const DateTime& dt) const;
 
 
    DLLEXPORT DateTimeNode* subtractBy(const DateTime* dt) const;
 
 
    DLLEXPORT DateTimeNode* subtractBy(const DateTime& dt) const;
 
    DLLEXPORT DateTimeNode* unaryMinus() const;
 
    DLLEXPORT DateTimeNode* refSelf() const;
 
    DLLEXPORT virtual int parseInit(QoreValue& val, QoreParseContext& parse_context);
 
    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* makeNow(const AbstractQoreZoneInfo* zone = currentTZ());
 
    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* n_zone, int n_year, int n_month, int n_day, int n_hour, int n_minute, int n_second, int n_us, ExceptionSink* xsink);
 
 
    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 static DateTimeNode* makeRelativeFromSeconds(int64 n_second, int n_us = 0);
};
 
DLLEXPORT extern DateTimeNode* ZeroDate;
DLLEXPORT extern DateTimeNode* OneDate;
 
 
class DateTimeValueHelper {
public:
    DLLEXPORT DateTimeValueHelper(const AbstractQoreNode* n);
 
    DLLEXPORT DateTimeValueHelper(const QoreValue& n);
 
    DLLEXPORT ~DateTimeValueHelper();
 
    DLLLOCAL const DateTime* operator->() { return dt; }
    DLLLOCAL const DateTime* operator*() { return dt; }
 
private:
    const DateTime* dt;
    bool del;
 
    DLLLOCAL DateTimeValueHelper(const DateTimeValueHelper&) = delete;
    DLLLOCAL DateTimeValueHelper& operator=(const DateTimeValueHelper&) = delete;
    DLLLOCAL static void* operator new(size_t) = delete;
};
 
 
class DateTimeNodeValueHelper {
public:
    DLLLOCAL DateTimeNodeValueHelper(const AbstractQoreNode* n) {
        if (!n) {
            dt = ZeroDate;
            del = 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));
            del = false;
            return;
        }
 
        dt = new DateTimeNode;
        n->getDateTimeRepresentation(*dt);
        del = true;
    }
 
 
    DLLLOCAL DateTimeNodeValueHelper(const AbstractQoreNode* n, ExceptionSink* xsink);
 
    DLLEXPORT DateTimeNodeValueHelper(const QoreValue& n);
 
    DLLLOCAL ~DateTimeNodeValueHelper() {
        if (dt && del)
            dt->deref();
    }
 
    DLLLOCAL const DateTimeNode* operator->() { return dt; }
    DLLLOCAL const DateTimeNode* operator*() { return dt; }
 
 
    DLLLOCAL DateTimeNode* getReferencedValue() {
        if (del)
            del = false;
        else if (dt)
            dt->ref();
        return dt;
    }
 
private:
    DateTimeNode* dt;
    bool del;
 
    DLLLOCAL DateTimeNodeValueHelper(const DateTimeNodeValueHelper&) = delete;
    DLLLOCAL DateTimeNodeValueHelper& operator=(const DateTimeNodeValueHelper&) = delete;
    DLLLOCAL static void* operator new(size_t) = delete;
};
 
#endif