51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atoi_check.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: erey-bet <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/07/21 08:21:05 by erey-bet #+# #+# */
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/* Updated: 2023/04/04 13:40:43 by erey-bet ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "utils.h"
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static int ft_isspace(char c)
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{
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if (c == ' ' || c == '\f'
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||c == '\n' || c == '\r' || c == '\t' || c == '\v')
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return (1);
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return (0);
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}
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int ft_atoi_check(const char *nptr)
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{
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int64_t result;
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int sign;
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while (ft_isspace(*nptr))
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nptr++;
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sign = 1;
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if (*nptr == '+' || *nptr == '-')
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{
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if (*nptr == '-')
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sign = -1;
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nptr++;
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}
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result = 0;
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while (*nptr >= '0' && *nptr <= '9')
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{
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result = result * 10 + (*nptr++ - '0') * sign;
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if ((result < 0 && sign == 1)
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|| (result > 0 && sign == -1))
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return (2);
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}
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if (*nptr--)
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return (1);
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if (*nptr == '-' || *nptr == '+')
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return (1);
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return (0);
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}
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