74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_itoa.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: gtertysh <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/12/02 19:59:03 by gtertysh #+# #+# */
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/* Updated: 2016/12/04 15:12:59 by gtertysh ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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static void help_help(int *n, char *ret, int *i)
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{
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if (*n < 0)
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{
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ret[0] = '-';
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*i = *i + 1;
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*n = -(*n);
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}
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if (*n == 0)
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ret[0] = '0';
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}
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static char *help(int n, long *div)
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{
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int len;
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char *ret;
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ret = NULL;
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len = 0;
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while (n)
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{
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n /= 10;
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*div = *div * 10;
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len++;
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}
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if (n < 0 || n == 0)
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len++;
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ret = ft_strnew(len);
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return (ret);
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}
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char *ft_itoa(int n)
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{
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char *ret;
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long div;
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int i;
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int exception;
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exception = 0;
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div = 1;
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i = 0;
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if (n == -2147483648)
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{
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n = n / 10;
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exception = 1;
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}
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if (!(ret = help(n, &div)))
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return (NULL);
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help_help(&n, ret, &i);
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while (div > 1)
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{
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div /= 10;
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ret[i++] = n / div + '0';
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n = n % div;
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}
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if (exception)
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ret[i] = '8';
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return (ret);
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}
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