76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_itoa.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: vvobis <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/04/05 20:16:48 by vvobis #+# #+# */
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/* Updated: 2024/04/11 14:48:59 by vvobis ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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static int get_len(int n)
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{
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int i;
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if (n < 0)
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n = -n;
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i = 0;
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while (n)
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{
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i++;
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n /= 10;
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}
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return (i);
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}
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static char *is_negative(int n)
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{
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int i;
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char *num;
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i = get_len(n);
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num = malloc(sizeof(*num) * i + 2);
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if (!num)
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return (NULL);
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num[i + 1] = 0;
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while (n)
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{
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num[i--] = -(n % 10) + 48;
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n /= 10;
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}
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num[i] = 0x2d;
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return (num);
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}
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static char *is_positive(int n)
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{
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int i;
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char *num;
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i = get_len(n);
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num = malloc(sizeof(*num) * i + 1);
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if (!num)
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return (NULL);
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num[i--] = 0;
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while (n)
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{
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num[i--] = (n % 10) + 48;
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n /= 10;
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}
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return (num);
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}
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char *ft_itoa(int n)
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{
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if (n == 0)
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return (ft_strdup("0"));
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else if (n < 0)
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return (is_negative(n));
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else
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return (is_positive(n));
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}
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