source: cpp/frams/param/paramobj.h @ 935

// This file is a part of Framsticks SDK.  http://www.framsticks.com/
// Copyright (C) 1999-2015  Maciej Komosinski and Szymon Ulatowski.
// See LICENSE.txt for details.

#ifndef _PARAMOBJ_H_
#define _PARAMOBJ_H_

#include "param.h"
#include <frams/util/extvalue.h>

class ParamObject : public DestrBase
{
        ParamObject(int _numfields, ParamEntry *_tab);
public:
        int numfields;
        Param par;
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4200) //Cannot generate copy-ctor or copy-assignment operator when UDT contains a zero-sized array
#endif
        ExtValue fields[0];
#ifdef _MSC_VER
#pragma warning(pop)
#endif
        ParamObject() { numfields = 0; }
        ~ParamObject();

        void* operator new(size_t s, int numfields){ return ::operator new(s + sizeof(ExtValue)*numfields); }
        void* operator new(size_t s){ return ::operator new(s); }
        void operator delete(void* ptr, int numfields) { ::operator delete(ptr); }
        void operator delete(void* ptr) { ::operator delete(ptr); }
        ParamObject *clone();
        static void p_new(void* obj, ExtValue *args, ExtValue *ret);

        void operator=(const ParamObject& src);

        static int firstFieldOffset();

        /** make a ParamEntry* array for use with Param object.
                offsets in the array are calculated for the ExtObject array as the target.
                valid array can be created with makeObject().
                sample code:
                @code
                ParamInterface *pi=...; // any param interface
                ParamEntry *tab=ParamObject::makeParamTab(pi);
                void* obj=ParamObject::makeObject(tab);
                void* obj2=ParamObject::makeObject(tab);
                Param par(tab,obj);
                par.set(...), par.get(...), par.load(...), par.saveSingle/MultiLine(...);
                par.select(obj);
                par.select(obj2);
                ParamObject::freeObject(obj);
                ParamObject::freeObject(obj2);
                */
        static ParamEntry* makeParamTab(ParamInterface *pi, bool stripgroups = 0, bool stripproc = 0, int firstprop = 0, int maxprops = 9999, bool dupentries = false, int flagsexclude_data = 0, int flagsexclude_tab = 0, bool addnew = false, const char* rename = NULL, bool readonly_into_userreadonly = false);

        /** deallocate paramtab obtained from makeParamTab() */
        static void freeParamTab(ParamEntry *pe);

        static void setParamTabText(ParamEntry *pe, const char* &ptr, const char* txt);
        static bool paramTabAllocatedString(ParamEntry *pe);
        static bool paramTabEqual(ParamEntry *pe1, ParamEntry *pe2);

        /** @return the object, suitable for Param.select(...).
                @return NULL if 'pi' has no usable properties */
        static ParamObject* makeObject(ParamEntry *tab);

        /** copy data from src to dst (compatibility with older implementation), same as operator=  */
        static void copyObject(void* dst, void* src);

        /** duplicate object (compatibility with older implementation), same as clone()  */
        static void* dupObject(void* obj);

        /** delete all data in the array and deallocate it (compatibility with older implementation), same as delete */
        static void freeObject(void* obj);
};

class ParamTabOwner
{
public:
        ParamEntry *pe;
        ParamTabOwner(ParamEntry *_pe) :pe(_pe) {}
        ~ParamTabOwner() { ParamObject::freeParamTab(pe); }
};

#endif