h

ft_itoa.c

@@ -0,0 +1,56 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_itoa.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: apommier <alexpomms@student.42.fr>         +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/12/08 18:20:19 by apommier          #+#    #+#             */
+/*   Updated: 2020/12/08 19:00:08 by apommier         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <libft.h>
+
+char	*fill(long n, int j, int minus)
+{
+	char *dest;
+
+	j += minus;
+	dest = (char*)ft_calloc(j + 1, 1);
+	if (dest == 0)
+		return (0);
+	dest[j] = 0;
+	while (n)
+	{
+		dest[j - 1] = n % 10 + '0';
+		j--;
+		n /= 10;
+	}
+	if (minus)
+		dest[j - 1] = '-';
+	return (dest);
+}
+
+char	*ft_itoa(int n)
+{
+	long	i;
+	int		j;
+	int		minus;
+
+	minus = 0;
+	i = 1;
+	j = 0;
+
+	if (n < 0)
+	{
+		minus = 1;
+		n = n * -1;
+	}
+	while (n >= i - 1)
+	{
+		i = i * 10;
+		j++;
+	}
+	return (fill(n, j, minus));
+}