1 files changed, 59 insertions, 0 deletions
diff --git a/libft/ft_itoa.c b/libft/ft_itoa.c
new file mode 100644
index 0000000..09d0319
--- /dev/null
+++ b/libft/ft_itoa.c
@@ -0,0 +1,59 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_itoa.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: kdx    <kdx   @student.42angouleme.fr      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2022/09/28 19:00:04 by kdx               #+#    #+#             */
+/*   Updated: 2022/10/13 22:43:21 by kdx              ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+static char	*_itoa(long v, int sign, long div, char *ptr)
+{
+	size_t			i;
+
+	i = 0;
+	if (sign == -1)
+	{
+		ptr[i] = '-';
+		i += 1;
+	}
+	while (div / 10 > 0)
+	{
+		div /= 10;
+		ptr[i] = '0' + v / div % 10;
+		i += 1;
+	}
+	ptr[i] = '\0';
+	return (ptr);
+}
+
+char	*ft_itoa(int n)
+{
+	long			v;
+	int				sign;
+	long			div;
+	size_t			i;
+	char			*ptr;
+
+	if (n == 0)
+		return (ft_strdup("0"));
+	v = n;
+	sign = (v > 0) - (v < 0);
+	v *= sign;
+	div = 1;
+	i = (sign == -1);
+	while (div <= v && i + 1)
+	{
+		i += 1;
+		div *= 10;
+	}
+	ptr = malloc(i + 1);
+	if (ptr == NULL)
+		return (NULL);
+	return (_itoa(v, sign, div, ptr));
+}