Add error handling

6 files changed, 194 insertions, 108 deletions

diff --git a/Makefile b/Makefile
index 8ac63f8..bb1667f 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ NAME = libftprintf.a
 CC = cc
 CFLAGS = -Wall -Wextra -Werror
 
-SRC_FILES = src/ft_printf.c src/ft_printnbr.c src/ft_printhex.c
+SRC_FILES = src/ft_printf.c src/ft_printnbr.c src/ft_printhex.c src/ft_printaddr.c
 OBJ_FILES = $(SRC_FILES:.c=.o)
 
 LIBFT = libft/libft.a
diff --git a/ft_printf.h b/ft_printf.h
index 2a3fbb9..eb43e44 100644
--- a/ft_printf.h
+++ b/ft_printf.h
@@ -6,18 +6,19 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/03/12 18:19:47 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/03/13 16:01:09 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/03/15 12:40:58 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #ifndef FT_PRINTF_H
 # define FT_PRINTF_H
 
-#include "libft/libft.h"
-#include <stdarg.h>
+# include "libft/libft.h"
+# include <stdarg.h>
 
-int	ft_printf(char *fmt, ...);
-int ft_printnbr(int nbr);
-int ft_printunbr(unsigned int nbr);
-int ft_printhex(unsigned int nbr, char fmt);
+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/src/ft_printaddr.c b/src/ft_printaddr.c
new file mode 100644
index 0000000..8b43ed9
--- /dev/null
+++ b/src/ft_printaddr.c
@@ -0,0 +1,44 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_printaddr.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/15 10:33:53 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/15 12:40:52 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);
+	if (*len < 0)
+		return ;
+	success = write(1, &c, 1);
+	if (success < 0)
+		*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/src/ft_printf.c b/src/ft_printf.c
index f6984c7..f85f071 100644
--- a/src/ft_printf.c
+++ b/src/ft_printf.c
@@ -6,69 +6,86 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/03/12 18:18:59 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/03/13 16:02:04 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/03/15 12:40:47 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "../ft_printf.h"
 #include <stdarg.h>
 
-static int print_char(char c)
+static int	print_char(char c)
 {
-    ft_putchar_fd(c, 1);
-    return 1;
+	return (write(1, &c, 1));
 }
 
-static int print_str(char *str)
+static int	print_str(char *str)
 {
-    if (str)
-    {
-        ft_putstr_fd(str, 1);
-        return ft_strlen(str);
-    }
-    else
-    {
-        ft_putstr_fd("(null)", 1);
-        return 6;
-    }
+	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)
+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')
-        ;
-    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 -2147483648;
+	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(char *fmt, ...)
+int	ft_printf(const char *fmt, ...)
 {
-    int result;
-    va_list args;
+	int		result;
+	int		last_result;
+	int		success;
+	va_list	args;
 
-   result = 0;
-   va_start(args, fmt);
-   while(*fmt)
-   {
-       if (*fmt == '%')
-           result += print_conv(args, *(++fmt));
-       else
-           result++;
-       fmt++;
-       if (result < 0)
-           return -1;
-   }
-   va_end(args);
-   return (result);
+	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/src/ft_printhex.c b/src/ft_printhex.c
index e96b322..d65de1c 100644
--- a/src/ft_printhex.c
+++ b/src/ft_printhex.c
@@ -6,42 +6,39 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/03/13 15:50:35 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/03/13 16:00:38 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/03/15 12:40:38 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "../ft_printf.h"
 
-static int get_len(unsigned int n)
+static void	printhex_rec(unsigned int nbr, char fmt, int *len)
 {
-    int len;
+	char	c;
+	int		success;
 
-    len = 0;
-    if (n == 0)
-        return 1;
-    while (n)
-    {
-        len++;
-        n /= 16;
-    }
-    return len;
+	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)++;
 }
 
-static void printhex_rec(unsigned int nbr, char fmt)
+int	ft_printhex(unsigned int nbr, char fmt)
 {
-    char c;
+	int	len;
 
-    if (nbr % 16 < 10)
-        c = '0' + (nbr % 16);
-    else
-        c = fmt - 35 + (nbr % 16);
-    if (nbr > 15)
-        printhex_rec(nbr, fmt);
-    write(1, &c, 1);
-}
-
-int ft_printhex(unsigned int nbr, char fmt)
-{
-    printhex_rec(nbr, fmt);
-    return get_len(nbr);
+	len = 0;
+	printhex_rec(nbr, fmt, &len);
+	return (len);
 }
diff --git a/src/ft_printnbr.c b/src/ft_printnbr.c
index cd20025..282e7a8 100644
--- a/src/ft_printnbr.c
+++ b/src/ft_printnbr.c
@@ -6,48 +6,75 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/03/13 15:18:40 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/03/13 15:49:00 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/03/15 12:40:43 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "../ft_printf.h"
-#include <unistd.h>
 
-static int get_len(long n)
+static void	printnbr_rec(int n, int *len)
 {
-    int len;
-
-    len = 0;
-    if (n == 0)
-        return 1;
-    if (n < 0)
-        len++;
-    while (n)
-    {
-        len++;
-        n /= 10;
-    }
-    return 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	ft_printnbr(int nbr)
 {
-    ft_putnbr_fd(nbr, 1);
-    return get_len(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)
+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);
-	write(1, &c, 1);
+		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	ft_printunbr(unsigned int nbr)
 {
-    printunbr_rec(nbr);
-    return get_len(nbr);
+	int	len;
+
+	len = 0;
+	printunbr_rec(nbr, &len);
+	if (len < 0)
+		return (-1);
+	return (len);
 }