c-style stack

myStack.c

#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>

typedef struct stack {
    char data;
    struct stack *next;
}Stack;

typedef struct stackList {
    Stack *top;
}sList;

void initStack(sList *list) {
    list->top = NULL;
}

void push(sList *list, char data) {
    Stack *new = (Stack*)malloc(sizeof(Stack));
    new->data = data;
    new->next = list->top;
    list->top = new;
}

char peek(sList *list) {
    return list->top->data;
}

void pop(sList *list) {
    Stack *temp = list->top->next;
    free(list->top);
    list->top = temp;
}

bool isEmpty(sList *list) {
    if (list->top == NULL) return true;
    else return false;
}