add libft, add gitignore

libft/ft_calloc.c

@@ -0,0 +1,31 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_calloc.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tomoron <marvin@42.fr>                     +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2023/10/31 02:38:46 by tomoron           #+#    #+#             */
+/*   Updated: 2023/10/31 18:15:42 by tomoron          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+#include "libft.h"
+
+void	*ft_calloc(size_t nb, size_t size)
+{
+	char				*res;
+	unsigned long int	i;
+
+	if (nb == 0 || size == 0)
+		return (malloc(1));
+	if ((long long)nb < 0 || (long long) size < 0)
+		return (0);
+	res = malloc(nb * size);
+	i = 0;
+	while (i < (nb * size) && res)
+	{
+		res[i] = 0;
+		i++;
+	}
+	return ((void *)res);
+}