HexPloR
105 lines
2.0 KiB
C
Executable File
105 lines
2.0 KiB
C
Executable File
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_itoa.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: hexplor <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/11/22 15:16:11 by hexplor #+# #+# */
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/* Updated: 2023/11/30 07:44:52 by yantoine ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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static int ft_n_digit(int n)
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{
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long index;
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if (n == 0)
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return (1);
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index = 0;
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while (n != 0)
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{
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n /= 10;
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index++;
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}
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return (index);
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}
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static int ft_pow(int n)
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{
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long index;
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index = 1;
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while (n != 0)
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{
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index *= 10;
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n--;
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}
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return (index / 10);
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}
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static void ft_set_number(char *tab)
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{
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long index;
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index = 0;
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while (index != 11)
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{
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tab[index] = index + '0';
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index++;
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}
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tab[index] = '\0';
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}
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static void ft_set_digit(long nbr_digit, long index, char *nbr, long n)
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{
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char digit[15];
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long pow;
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if (n == 0)
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{
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*nbr = '0';
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*(nbr + 1) = 0;
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return ;
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}
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ft_set_number(digit);
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pow = ft_pow(nbr_digit);
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while (nbr_digit != 0)
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{
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*(nbr + index++) = digit[(n / pow) % 10];
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nbr_digit--;
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pow /= 10;
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}
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*(nbr + index++) = '\0';
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}
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char *ft_itoa(int n)
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{
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char *nbr;
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long index;
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long n2;
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long nbr_digit;
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n2 = (long) n;
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nbr_digit = ft_n_digit(n);
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index = 0;
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if (n2 < 0)
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{
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nbr = ft_calloc((nbr_digit + 2), 1);
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if (!nbr)
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return (NULL);
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*(nbr + index++) = '-';
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n2 *= -1;
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}
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else
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{
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nbr = ft_calloc((nbr_digit + 1), 1);
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if (!nbr)
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return (NULL);
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}
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ft_set_digit(nbr_digit, index, nbr, n2);
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return (nbr);
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}
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