int_stack.c

//
// Created by oopc-8 on 26.09.16.
//

#include "int_stack.h"

void init(tStack *s) {
    tStackElement *newContent;
    newContent = (tStackElement) malloc(sizeof(tStackElement));

    if (newContent == NULL) {
        printf("Insufficient memory");
        return -1;
    }

    s->content = newContent;
    s->top = -1;
}

void destroy(tStack *s) {
    free(s->content);
    s->content = NULL;
    s->top = -1;
}

int isEmpty(tStack s) {
    if (s.top < 0) {
        return 1;
    } else {
        return 0;
    }
}

int isFull(tStack s) {
    if (s.top >= s.maxSize - 1) {
        return 1;
    } else {
        return 0;
    }
}

int push(tStack *s,tStackElement el) {
    s->top++;
    s->content = (tStackElement) realloc(s->content, sizeof(tStackElement) * (top + 1));

    s->content[s->top] = el;
    return 1;
}

tStackElement pop(tStack *s){
    if (isEmpty(s)) {
        printf("Cannot pop element, cause stack is empty");
        return -1;
    }

    return s->content[s->top--];
}