Add ft_printf

1 files changed, 44 insertions, 0 deletions

diff --git a/ft_printhex.c b/ft_printhex.c
new file mode 100644
index 0000000..4605eac
--- /dev/null
+++ b/ft_printhex.c
@@ -0,0 +1,44 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_printhex.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/13 15:50:35 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/18 11:42:46 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ft_printf.h"
+
+static void	printhex_rec(unsigned int nbr, char fmt, int *len)
+{
+	char	c;
+	int		success;
+
+	if (*len < 0)
+		return ;
+	if (nbr % 16 < 10)
+		c = '0' + (nbr % 16);
+	else
+		c = (fmt - 33) + (nbr % 16);
+	if (nbr > 15)
+		printhex_rec(nbr / 16, fmt, len);
+	if (*len < 0)
+		return ;
+	success = write(1, &c, 1);
+	if (success < 0)
+		*len = -1;
+	else
+		(*len)++;
+}
+
+int	ft_printhex(unsigned int nbr, char fmt)
+{
+	int	len;
+
+	len = 0;
+	printhex_rec(nbr, fmt, &len);
+	return (len);
+}