2a + assert

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include "task2a.h"

void init(Stack* s)
{
    s->top = -1;
    s->size = SIZE;
    s->data = (int*)malloc(SIZE * sizeof(int));
    if(s->data == NULL)
        {
            printf("error");
            free(s->data);
            abort();
        }
}


void push(Stack *s, int element)
{

   if(s->top == s->size -1)
    {
        s->data = realloc(s->data, s->size*2*sizeof(int));
        if (!s->data)
        {
            free(s->data);
            perror("realloc");
        }
        s->size *= 2;
    }

    s->data[++s->top] = element;
}


int pop(Stack* s)
{
    if(isEmpty(s))
    {
        printf("Stack is empty");
        abort();
    }
    else
    {
        return s->data[s->top--];
    }
}

bool isEmpty(Stack *s)
{
    if (s->top == -1)
    {
        return true;

    }
    else
    {
        return false;

    }
}


void destroy (Stack *s)
{
    free(s->data);
}


void initAndCopy(Stack* s, Stack* source)
{
    s->data = (int*)malloc(sizeof(int) * source->size);

//     if(s->data == NULL)
//     {
//         printf("unable to allocate memory");
//         abort();
//     }

    assert(s->data != NULL);
    s->top = source->top;
    s->size = source->size;
    for(int i = s->top; i>=0;i--)
    {
        s->data[i] = source-> data[i];
    }


}

void assign (Stack *s, Stack *source)
{
    if(s->size != source->size)
    {
        s->data = realloc(s->data, sizeof(int) * (source->size));
    }

    s->top = source->top;
    s->size = source->size;
    for(int i = source->top; i>=0; i--)
    {
        s->data[i] = source-> data[i];
    }
}

void display(Stack *s)
{
    int i;
    for(i = 0; i <= s->top; i++) printf("%d ", s->data[i]);

}