42_ft_printf/ft_dprintul_base.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_dprintul_base.c                                 :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/09/29 13:49:45 by cchauvet          #+#    #+#             */
/*   Updated: 2022/10/23 14:23:44 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

static size_t	ft_str_size(unsigned long long n, size_t base_size)
{
	size_t			size;

	size = 1;
	if (n == 0)
		return (2);
	while (n != 0)
	{
		n = n / base_size;
		size++;
	}
	return (size);
}

static int	ft_isdup(char *str)
{
	char	c;
	size_t	i;

	while (*str != 0)
	{
		c = *str;
		i = 1;
		while (str[i] != 0)
		{
			if (str[i] == c)
				return (1);
			i++;
		}
		str++;
	}
	return (0);
}

static size_t	ft_base_size(char *base)
{
	size_t	len;

	if (ft_isdup(base))
		return (0);
	len = ft_strlen(base);
	if (len < 2)
		return (0);
	return (len);
}

int	ft_dprintul_base(int fd, unsigned long long n, char *base)
{
	size_t			base_size;
	int				str_size;

	if (base == NULL)
		return (-1);
	base_size = ft_base_size(base);
	if (base_size == 0)
		return (-1);
	str_size = ft_str_size(n, base_size);
	if (n > base_size - 1)
	{
		ft_dprintul_base(fd, n / base_size, base);
		ft_putchar_fd(fd, base[n % base_size]);
	}
	else
		ft_putchar_fd(fd, base[n]);
	return (str_size - 1);
}