Add ft_printf

7 files changed, 286 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 1fdbab6..9e94fb2 100644
--- a/Makefile
+++ b/Makefile
@@ -36,6 +36,10 @@ SRC_FILES = ft_atoi.c \
 			ft_substr.c \
 			ft_tolower.c \
 			ft_toupper.c \
+			ft_printf.c \
+			ft_printnbr.c \
+			ft_printhex.c \
+			ft_printaddr.c
 
 
 OBJ_FILES = $(SRC_FILES:.c=.o)
diff --git a/ft_printaddr.c b/ft_printaddr.c
new file mode 100644
index 0000000..f60ce0d
--- /dev/null
+++ b/ft_printaddr.c
@@ -0,0 +1,42 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_printaddr.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/15 10:33:53 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/18 11:42:58 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ft_printf.h"
+
+static void	printaddr_rec(unsigned long addr, int *len)
+{
+	char	c;
+	int		success;
+
+	if (*len < 0)
+		return ;
+	if (addr % 16 < 10)
+		c = '0' + (addr % 16);
+	else
+		c = ('a' - 10) + (addr % 16);
+	if (addr > 15)
+		printaddr_rec(addr / 16, len);
+	success = write(1, &c, 1);
+	if (success < 0 || *len < 2)
+		*len = -1;
+	else
+		(*len)++;
+}
+
+int	ft_printaddr(void *addr)
+{
+	int	len;
+
+	len = write(1, "0x", 2);
+	printaddr_rec((unsigned long)addr, &len);
+	return (len);
+}
diff --git a/ft_printf.c b/ft_printf.c
new file mode 100644
index 0000000..fc77f81
--- /dev/null
+++ b/ft_printf.c
@@ -0,0 +1,90 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_printf.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/12 18:18:59 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/18 11:42:34 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ft_printf.h"
+
+static int	print_char(char c)
+{
+	return (write(1, &c, 1));
+}
+
+static int	print_str(char *str)
+{
+	int	success;
+	int	len;
+
+	if (str)
+	{
+		len = 0;
+		while (str[len])
+			len++;
+		success = write(1, str, len);
+		if (success < 0)
+			return (-1);
+		return (len);
+	}
+	else
+	{
+		success = write(1, "(null)", 6);
+		if (success == 6)
+			return (6);
+		return (-1);
+	}
+}
+
+static int	print_conv(va_list args, char c)
+{
+	if (c == 'c')
+		return (print_char(va_arg(args, int)));
+	if (c == 's')
+		return (print_str(va_arg(args, char *)));
+	if (c == 'p')
+		return (ft_printaddr(va_arg(args, void *)));
+	if (c == 'd' || c == 'i')
+		return (ft_printnbr(va_arg(args, int)));
+	if (c == 'u')
+		return (ft_printunbr(va_arg(args, unsigned int)));
+	if (c == 'x' || c == 'X')
+		return (ft_printhex(va_arg(args, unsigned int), c));
+	if (c == '%')
+		return (print_char('%'));
+	return (-1);
+}
+
+int	ft_printf(const char *fmt, ...)
+{
+	int		result;
+	int		last_result;
+	int		success;
+	va_list	args;
+
+	result = 0;
+	va_start(args, fmt);
+	while (*fmt)
+	{
+		last_result = result;
+		if (*fmt == '%')
+			result += print_conv(args, *(++fmt));
+		else
+		{
+			success = write(1, fmt, 1);
+			if (success <= 0)
+				return (-1);
+			result++;
+		}
+		fmt++;
+		if (result < last_result)
+			return (-1);
+	}
+	va_end(args);
+	return (result);
+}
diff --git a/ft_printf.h b/ft_printf.h
new file mode 100644
index 0000000..22f6a2a
--- /dev/null
+++ b/ft_printf.h
@@ -0,0 +1,24 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_printf.h                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/12 18:19:47 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/15 13:33:09 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef FT_PRINTF_H
+# define FT_PRINTF_H
+
+# include <stdarg.h>
+# include <unistd.h>
+
+int	ft_printf(const char *fmt, ...);
+int	ft_printnbr(int nbr);
+int	ft_printunbr(unsigned int nbr);
+int	ft_printhex(unsigned int nbr, char fmt);
+int	ft_printaddr(void *addr);
+#endif // FT_PRINTF_H
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);
+}
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);
+}
diff --git a/libft.h b/libft.h
index 148094f..0e35f35 100644
--- a/libft.h
+++ b/libft.h
@@ -6,13 +6,14 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/03/10 16:37:54 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/03/11 13:11:23 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/04/12 16:44:02 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #ifndef LIBFT_H
 # define LIBFT_H
 
+# include "ft_printf.h"
 # include <stdlib.h>
 # include <string.h>
 # include <unistd.h>