added ft_itoa_base

Makefile

@@ -6,7 +6,7 @@
 #    By: anaiel <[email protected]>              +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2018/11/06 17:19:55 by anleclab          #+#    #+#              #
-#    Updated: 2019/01/02 10:38:38 by anleclab         ###   ########.fr        #
+#    Updated: 2019/01/02 11:56:54 by anleclab         ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -25,7 +25,7 @@ SRC = ft_memset.c ft_bzero.c ft_memcpy.c ft_memccpy.c ft_memmove.c ft_memchr.c \
 	  ft_lstdelone.c ft_lstdel.c ft_lstadd.c ft_lstiter.c ft_lstmap.c \
 	  ft_strsplitlst.c ft_putstrarray.c ft_putstrlst.c ft_putfile.c \
 	  ft_filelinecount.c ft_putwchar.c ft_printbits.c ft_wchar_to_bytes.c \
-	  ft_double_power.c ft_array_swap.c
+	  ft_double_power.c ft_array_swap.c ft_itoa_base.c
 OBJ = $(SRC:.c=.o)
 
 .PHONY: all, clean, fclean, re

README.md

@@ -66,6 +66,7 @@ Run the command `make` to create the **libft.a** library file.
 ### Conversions
 - ft_atoi
 - ft_itoa
+- ft_itoa_base
 
 ### Printing
 - ft_putchar
@@ -85,6 +86,7 @@ Run the command `make` to create the **libft.a** library file.
 - ft_filelinecount
 - ft_double_power
 - ft_wchar_to_bytes
+- ft_array_swap
 
 ## Updating
 

libft.h

@@ -6,7 +6,7 @@
 /*   By: anaiel <[email protected]>              +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2018/11/06 17:19:32 by anleclab          #+#    #+#             */
-/*   Updated: 2019/01/02 10:39:19 by anleclab         ###   ########.fr       */
+/*   Updated: 2019/01/02 11:57:30 by anleclab         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -92,5 +92,6 @@ int					ft_putwchar(wchar_t c);
 unsigned char		*ft_wchar_to_bytes(wint_t c);
 double				ft_double_power(double n, int pow);
 void				ft_array_swap(int *array, int i1, int i2);
+char				*ft_itoa_base(int n, int base);
 
 #endif

src/ft_itoa_base.c

@@ -0,0 +1,70 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_itoa_base.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: anleclab <[email protected]>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/01/02 11:39:22 by anleclab          #+#    #+#             */
+/*   Updated: 2019/01/02 11:55:06 by anleclab         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdlib.h>
+#include "../libft.h"
+
+static char	*init_base(int base)
+{
+	char	*charbase;
+	int		i;
+
+	if (base < 2 || base > 16)
+		return (NULL);
+	if (!(charbase = ft_strnew(base + 1)))
+		return (NULL);
+	i = 0;
+	while (i < base && i < 10)
+		charbase[i] = i;
+	while (i < base)
+		charbase[i] = i - 10 + 'A';
+	return (charbase);
+}
+
+static int	nb_digits(unsigned int nb, int base)
+{
+	int		nbdigits;
+
+	nbdigits = 0;
+	if (nb == 0)
+		return (1);
+	while (nb)
+	{
+		nbdigits++;
+		nb /= base;
+	}
+	return (nbdigits);
+}
+
+char		*ft_itoa_base(int n, int base)
+{
+	char			*charbase;
+	char			*res;
+	unsigned int	nb;
+	int				nbdigits;
+	int				i;
+
+	if (!(charbase = init_base(base)))
+		return (NULL);
+	nb = (n < 0) ? -n : n;
+	nbdigits = nb_digits(nb, base);
+	if (!(res = ft_strnew(nbdigits + 1)))
+		return (NULL);
+	i = -1;
+	while (++i < nbdigits - 1)
+	{
+		res[nbdigits - 1 - i] = charbase[nb % base];
+		nb /= base;
+	}
+	free(charbase);
+	return (res);
+}