first working version

Makefile

@@ -20,19 +20,19 @@ CC = gcc
 
 CFLAGS = -Wall -Wextra -Werror
 
-AR = AR
+AR = ar
 
-all: $(NAME) libft.a
+all: $(NAME)
 
-libft.a:
+lib/libft.a:
 	$(MAKE) -C libft
 	$(MAKE) -C libft clean
-	mkdir lib
+	mkdir -p lib
-	mkdir inc
+	mkdir -p inc
 	cp libft/libft.h inc/libft.h
 	mv libft/libft.a lib/libft.a
 
-$(NAME): $(OBJECTS)
+$(NAME): lib/libft.a $(OBJECTS)
 	$(AR) -r $@ $?
 
 %.o: %.c

ft_printf.c

@@ -11,9 +11,201 @@
 /* ************************************************************************** */
 
 #include <stdarg.h>
+#include <unistd.h>
+#include <stdlib.h>
 #include "libft.h"
+#include "ft_printf.h"
 
-int	ft_printf(const char *str, ...)
+
+int	ft_isbase(char *str)
 {
+	int	i;
+	int	n;
+
+	n = 0;
+	while (str[n])
+	{
+		i = 1;
+		if (str[n] == '-' || str[n] == '+')
+			return (0);
+		while (str[n + i])
+		{
+			if (str[n] == str[n + i])
+				return (0);
+			i++;
+		}
+		n++;
+	}
+	return (n);
+}
+
+void	ft_write_str(char c, char *str)
+{
+	int	i;
+
+	i = 0;
+	while (str[i])
+	{
+		i++;
+	}
+	str[i++] = c;
+	str[i] = '\0';
+}
+
+void	ft_putnbr_base(long nbr, char *base, char *result)
+{
+	int	b;
+
+	b = ft_isbase(base);
+	if (b < 2)
+		return ;
+	if (nbr >= 0 && nbr < b)
+	{
+		ft_write_str(base[nbr], result);
+	}
+	else if (nbr < 0)
+	{
+		ft_write_str('-', result);
+		if (nbr > -b)
+			ft_putnbr_base(-nbr, base, result);
+		else
+		{
+			ft_putnbr_base(nbr / (-b), base, result);
+			ft_putnbr_base(-(nbr % b), base, result);
+		}
+	}
+	else if (nbr >= b)
+	{
+		ft_putnbr_base(nbr / b, base, result);
+		ft_putnbr_base(nbr % b, base, result);
+	}
+}
+
+int	print_char(va_list args)
+{
+	char	c;
+
+	c = va_arg(args, int);
+	return (write(1, &c, 1));
+}
+
+int	print_string(va_list args)
+{
+	char	*str;
+	size_t	len;
+
+	str = va_arg(args, char *);
+	len = ft_strlen(str);
+	return (write(1, str, len));
+}
+
+int	print_number(va_list args)
+{
+	long	n;
+	size_t	len;
+	char	*str;
+	int		wrote;
+
+	wrote = 0;
+	str = ft_calloc(sizeof(char), 12);
+	if (!str)
+		return (wrote);
+	n = va_arg(args, int);
+	ft_putnbr_base(n, "0123456789", str);
+	len = ft_strlen(str);
+	wrote = write(1, str, len);
+	free(str);
+	return (wrote);
+}
+
+int	print_hex(va_list args, int uppercase)
+{
+	long	n;
+	size_t	len;
+	char	*str;
+	int		wrote;
+
+	wrote = 0;
+	str = ft_calloc(sizeof(char), 20);
+	if (!str)
+		return (wrote);
+	n = va_arg(args, unsigned int);
+	if (uppercase)
+		ft_putnbr_base(n, "0123456789ABCDEF", str);
+	else
+		ft_putnbr_base(n, "0123456789abcdef", str);
+	len = ft_strlen(str);
+	wrote = write(1, str, len);
+	free(str);
+	return (wrote);
+}
+
+int	parse_conversion(const char **format, va_list args)
+{
+	int	wrote;
+
+	wrote = 0;
+	if (**format == 'c')
+		wrote = print_char(args);
+	else if (**format == 's')
+		wrote = print_string(args);
+	else if (ft_strchr("diu", **format))
+		wrote = print_number(args);
+	else if (ft_strchr("px", **format))
+		wrote = print_hex(args, 0);
+	else if (ft_strchr("X", **format))
+		wrote = print_hex(args, 1);
+	return (wrote);
+}
+
+int	parse_placeholder(const char **format, va_list args)
+{
+	const char	conversions[] = "cspdiuxX%";
+	int			wrote;
+
+	(*format)++;
+	(void) args;
+	while (**format && !ft_strchr(conversions, **format))
+		(*format)++;
+	if (**format == '%')
+		write(1, *format, 1);
+	else
+		wrote = parse_conversion(format, args);
+	return (1);
+}
+
+int	ft_printf(const char *format, ...)
+{
+	int		wrote;
+	va_list	args;
+
+	wrote = 0;
+	va_start(args, format);
+	while (*format)
+	{
+		if (*format == '%')
+			wrote += parse_placeholder(&format, args);
+		else
+			wrote += write(1, format, 1);
+		format++;
+	}
+	va_end(args);
+	return (wrote);
+}
+
+int	main(void)
+{
+	const char	str[] = "HOIe";
+
+	ft_printf("test:\n");
+	ft_printf("%%%% = %%\n--\n");
+	ft_printf("%%c = %c\n--\n", 't');
+	ft_printf("%%s = %s\n--\n", str);
+	ft_printf("%%d = %d\n--\n", 255);
+	ft_printf("%%i = %i\n--\n", 255);
+	ft_printf("%%u = %u\n--\n", 255);
+	ft_printf("%%p = %p\n--\n", str);
+	ft_printf("%%x = %x\n--\n", 255);
+	ft_printf("%%X = %X\n--\n", 255);
 	return (0);
 }

ft_printf.h

@@ -0,0 +1,18 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                  :::  o_   ::::::    :::   */
+/*   ft_printf.h                                   :+:  /    :+::+:    :+:    */
+/*                                                +:+   >   +:++:+    +:+     */
+/*   By: whaffman <whaffman@student.codam.nl>    +#+  +:+  +#++#++:++#++      */
+/*                                              +#+ +#+#+ +#++#+    +#+ \o/   */
+/*   Created: 2024/10/15 13:04:31 by whaffman   #+#+# #+#+# #+#    #+#   |    */
+/*   Updated: 2024/10/15 13:07:34 by whaffman   ###   ###  ###    ###   / \   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef FT_PRINTF_H
+# define FT_PRINTF_H
+
+int	ft_printf(const char *format, ...);
+
+#endif