ft_calloc.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_calloc.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: edesaint <edesaint@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/11/13 18:18:49 by edesaint          #+#    #+#             */
/*   Updated: 2022/12/06 19:53:41 by edesaint         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include <stdint.h>
#include "libft.h"

void	*ft_calloc(size_t nmemb, size_t size)
{
	void	*ptr;

	if (nmemb == 0 || size == 0)
	{
		ptr = malloc(1);
		if (!ptr)
			return (NULL);
		((unsigned char *)ptr)[0] = 0;
		return (ptr);
	}
	if (nmemb > SIZE_MAX / size)
		return (NULL);
	ptr = (void *) malloc(nmemb * size);
	if (!ptr)
		return (NULL);
	ft_bzero(ptr, nmemb * size);
	return (ptr);
}