87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_convertbase.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: hulamy <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2018/11/16 15:15:55 by hulamy #+# #+# */
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/* Updated: 2020/02/19 18:47:35 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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static int ft_malloc_size(int decimal, int length, int i)
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{
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if (decimal <= 0)
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i++;
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while (decimal)
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{
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decimal /= length;
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i++;
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}
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return (i);
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}
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static char *ft_decimal_to_base(int decimal, char *base, char *res, int size)
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{
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long nb;
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int i;
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nb = decimal;
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i = 0;
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while (base[i])
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i++;
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if (nb < 0)
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nb = -nb;
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while (--size >= 0)
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{
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res[size] = base[nb % i];
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nb /= i;
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}
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return (res);
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}
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static int ft_base_to_decimal(char *nbr, char *base, int length, int i)
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{
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long decimal;
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int j;
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decimal = 0;
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if (nbr[i] == '-')
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i++;
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while (nbr[i])
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{
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j = 0;
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while (nbr[i] != base[j] && base[j])
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j++;
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decimal = (decimal * length) + j;
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i++;
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}
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if (nbr[0] == '-')
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decimal = -decimal;
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return (decimal);
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}
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char *ft_convertbase(char *nbr, char *base_from, char *base_to)
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{
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int length;
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int size;
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int decimal;
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char *res;
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res = 0;
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length = 0;
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while (base_from[length])
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length++;
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decimal = ft_base_to_decimal(nbr, base_from, length, 0);
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length = 0;
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while (base_to[length])
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length++;
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size = ft_malloc_size(decimal, length, 0);
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res = (char *)malloc(sizeof(char) * (size + 1));
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res[size] = '\0';
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return (ft_decimal_to_base(decimal, base_to, res, size));
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}
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