stack.c

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#include <stdlib.h>
#include <stdio.h>
#include "stack.h"

Stack *stCreate(){
        Stack *st = (Stack*)malloc(sizeof(Stack));

        st->elements = listCreate();
        st->destroyFunction = NULL;
        return st;
}

void stDestroy(Stack **stackAddress, StDestroyMode mode){
        Stack *st = stackAddress[0];
        if (mode == ST_DM_KEEP){
                listDestroy(&st->elements, DBLIST_DM_KEEP);
        }
        else {
                void *object;
                listPrepare(st->elements, DBLIST_TM_FROM_HEAD);
                while (listGetNext(st->elements, &object) != -1){
                        if (st->destroyFunction == NULL){
                                free(object);
                        }
                        else {
                                st->destroyFunction((StackP)st, object);
                        }
                }
        }
        free(st);
        stackAddress[0] = NULL;
}

int stPush(Stack *st, void *object){
        return listInsertTail(st->elements, object);
}

int stPop(Stack *st, void **objectAddress){
        return listRemoveTail(st->elements, objectAddress);
}

int stGetTop(Stack *st, void **objectAddress){
        return listGetTail(st->elements, objectAddress);
}

int stNumElements(Stack *st){
        return st->elements->numElements;
}

int stRegisterDestroyFunction(Stack *st, StDestroyFunction *destroyFunction){
        st->destroyFunction = destroyFunction;
        return 1;
}

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