Libft extra functions

2025-11-16 20:26:45 +01:00
parent 625a922cc9
commit cbbade912d
13 changed files with 459 additions and 13 deletions
--- a/lib/libft/ft_itoa_base.c
+++ b/lib/libft/ft_itoa_base.c
@@ -0,0 +1,82 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_itoa_base.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: aortigos <aortigos@student.42malaga.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2023/09/22 20:46:43 by aortigos          #+#    #+#             */
+/*   Updated: 2025/11/16 19:04:48 by aortigos         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+static int	mem_str(int base)
+{
+	if (base == 2)
+		return (sizeof(int) * 8);
+	else if (base == 8)
+		return (22);
+	else if (base == 16)
+		return (16);
+	return (0);
+}
+
+static void	test(int base, char *str, int i, unsigned int digit)
+{
+	if (base == 2 || base == 8)
+		str[i] = '0' + digit;
+	else if (base == 16)
+	{
+		if (digit < 10)
+			str[i] = '0' + digit;
+		else
+			str[i] = 'a' + digit - 10;
+	}
+}
+
+static char	*str_invert(char *str, int index)
+{
+	int		i;
+	int		j;
+	char	temp;
+
+	i = 0;
+	j = index - 1;
+	while (i < j)
+	{
+		temp = str[i];
+		str[i] = str[j];
+		str[j] = temp;
+		i++;
+		j--;
+	}
+	return (str);
+}
+
+char	*ft_itoa_base(unsigned long long ul, int base)
+{
+	char			*str;
+	int				i;
+	unsigned int	digit;
+
+	if (base != 2 && base != 8 && base != 16)
+		return (NULL);
+	str = (char *)malloc(sizeof(char) * (mem_str(base) + 1));
+	if (!str)
+		return (NULL);
+	i = 0;
+	while (ul > 0)
+	{
+		digit = ul % base;
+		test(base, str, i, digit);
+		ul /= base;
+		i++;
+	}
+	if (i == 0)
+		str[i++] = '0';
+	str[i] = 0;
+	str_invert(str, i);
+	return (str);
+}