skeletton untested project

libft/ft_utoa_base.c

@@ -0,0 +1,93 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_utoa_base.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/23 13:59:32 by thrieg            #+#    #+#             */
+/*   Updated: 2025/02/16 19:05:36 by thrieg           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+#include "ft_vector.h"
+
+static int	ft_is_sign(char c)
+{
+	if (c == '-' || c == '+')
+		return (1);
+	else
+		return (0);
+}
+
+//converts nbr into a known to be valid base, then append it to vec
+//returns 0 if the concatenation fails, or 1 if everything goes well
+static int	ft_put_ok_base(
+unsigned int nbr,
+char *base,
+size_t base_lenght,
+t_vector *vec)
+{
+	char	buffer[32];
+	int		i;
+
+	i = 31;
+	if (nbr == 0)
+		if (!ft_vector_pushback(vec, base[0]))
+			return (0);
+	while (nbr > 0)
+	{
+		buffer[i] = base[nbr % base_lenght];
+		nbr /= base_lenght;
+		i--;
+	}
+	if (!ft_vector_concat(vec, (buffer + i + 1), (31 - i)))
+		return (0);
+	return (1);
+}
+
+//returns 1 if the base is valid, and 0 if it's not
+static int	ft_is_ok_base(char *base)
+{
+	char	used_characters[128];
+	size_t	i;
+
+	i = 0;
+	ft_bzero(used_characters, 128);
+	while (base[i] != '\0')
+	{
+		if (used_characters[(int) base[i]] == 0)
+			used_characters[(int) base[i]]++;
+		else
+			return (0);
+		if (ft_is_sign(base[i]))
+			return (0);
+		i++;
+	}
+	if (i < 2)
+		return (0);
+	return (1);
+}
+
+//returns a standard C string of nbr converted in the "base" base
+//base have to only cointain ascii characters
+//returns NULL if the base is invalid or if an allocation failed
+char	*ft_utoa_base(unsigned int unsigned_nbr, char *base)
+{
+	t_vector		*ret;
+	char			*ret_str;
+
+	ret = ft_create_vector(2);
+	if (!ret)
+		return (NULL);
+	if (!ft_is_ok_base(base))
+		return (ft_free_vector(&ret), NULL);
+	if (!ft_put_ok_base(unsigned_nbr, base, ft_strlen(base), ret))
+		return (ft_free_vector(&ret), NULL);
+	ret_str = ft_vtoc(ret);
+	ft_free_vector(&ret);
+	if (!ret_str)
+		return (NULL);
+	return (ret_str);
+}