Add ft_printf

1 files changed, 80 insertions, 0 deletions

diff --git a/ft_printnbr.c b/ft_printnbr.c
new file mode 100644
index 0000000..2a42ed8
--- /dev/null
+++ b/ft_printnbr.c
@@ -0,0 +1,80 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_printnbr.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/13 15:18:40 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/18 11:41:27 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ft_printf.h"
+
+static void	printnbr_rec(int n, int *len)
+{
+	char	c;
+	int		success;
+
+	if (*len < 0)
+		return ;
+	c = '0' + n % 10;
+	if (n > 9)
+		printnbr_rec(n / 10, len);
+	if (*len < 0)
+		return ;
+	success = write(1, &c, 1);
+	if (success < 0)
+		*len = -1;
+	else
+		(*len)++;
+}
+
+int	ft_printnbr(int nbr)
+{
+	int	len;
+
+	len = 0;
+	if (nbr == -2147483648)
+		return (write(1, "-2147483648", 11));
+	if (nbr < 0)
+	{
+		len = write(1, "-", 1);
+		nbr *= -1;
+	}
+	printnbr_rec(nbr, &len);
+	if (len < 0)
+		return (-1);
+	return (len);
+}
+
+static void	printunbr_rec(unsigned int n, int *len)
+{
+	char	c;
+	int		success;
+
+	if (*len < 0)
+		return ;
+	c = '0' + n % 10;
+	if (n > 9)
+		printunbr_rec(n / 10, len);
+	if (*len < 0)
+		return ;
+	success = write(1, &c, 1);
+	if (success < 0)
+		*len = -1;
+	else
+		(*len)++;
+}
+
+int	ft_printunbr(unsigned int nbr)
+{
+	int	len;
+
+	len = 0;
+	printunbr_rec(nbr, &len);
+	if (len < 0)
+		return (-1);
+	return (len);
+}