ObjectArray.cpp

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#include "ObjectArray.h"

#include "Object.h"
#include "ObjectLink.h"

#include <stdio.h>

ObjectArray::ObjectArray () : Object()
{
        this->_first = 0;
}

ObjectArray::~ObjectArray() {
        ObjectLink *help = 0;
        
        while(this->_first != NULL) {
                help = this->_first->GetNext();
                delete this->_first;
                this->_first = help;
        }
        this->_first = 0;
}

void ObjectArray::FreeArray() {
        ObjectLink *help; help = this->_first;
        Object *object = 0;
        
        while(this->_first != NULL) {
                help = this->_first->GetNext();
                object = this->_first->GetValue();
                delete object;
                delete this->_first;
                this->_first = help;
        }
        this->_first = 0;
}

class Object *ObjectArray::GetAt(int pAt) {
        ObjectLink *link;
        link= this->_first;
        while(link && (link->GetIndex() < pAt)) {
                link = link->GetNext();
        }
        if(link && (pAt == link->GetIndex())) {
                return link->GetValue();
        } else {
                return 0;
        }
}

class Object * ObjectArray::PutAt (int pAt, class Object *pO, bool replace) {
        ObjectLink *prevLink;
        ObjectLink *curLink;
        prevLink = 0;
        curLink = this->_first;
        while(curLink && (curLink->GetIndex() < pAt)) {
                prevLink = curLink;
                curLink = curLink->GetNext();
        }
        if(curLink && (pAt == curLink->GetIndex())) {
                if(replace) {
                        Object *o; o = curLink->GetValue();
                        curLink->SetValue(pO);
                        return o;
                } else {
                        return 0;
                }
        } else {
                ObjectLink *newLink = new ObjectLink(pAt,pO);
                newLink->SetNext(curLink);
                if(this->_first == curLink) {
                        this->_first = newLink;
                }
                if(prevLink) {
                        prevLink->SetNext(newLink);
                }                               
                return 0;
        }
}

bool ObjectArray::IsEmpty () {
        return (this->_first == 0);
}

void ObjectArray::Print(int indent) {
        ObjectLink *curLink;

        PrintIndent(indent);
        printf("ObjectArray:\n");
        
        if(this->IsEmpty()) {
                PrintIndent(indent+2);
                printf("I contain no objects\n");
        } else {
                PrintIndent(indent+2);
                printf("I contain following objects:\n");
                
                curLink = this->_first;
                while (curLink) {
                        curLink->GetValue()->Print(indent+2);
                        curLink = curLink->GetNext();
                }
        }
        
        Object::Print(indent+2);
}

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