60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atoll.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: rparodi <rparodi@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/10/31 15:12:07 by rparodi #+# #+# */
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/* Updated: 2025/09/01 16:32:11 by rparodi ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include <unistd.h>
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static int ft_check_space(int c)
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{
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if (c == 32 || (c >= 9 && c <= 13))
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return (1);
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return (0);
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}
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static int ft_check_sign(const char *nptr, size_t *i)
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{
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while (ft_check_space(nptr[*i]))
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(*i)++;
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if (nptr[*i] == '-')
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{
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(*i)++;
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return (-1);
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}
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else if (nptr[*i] == '+')
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(*i)++;
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return (1);
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}
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/**
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* @brief Converts string to long long integer
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*
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* @param nptr the string that will be converted
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* @return The long long int on the string
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*/
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long long int ft_atoll(const char *nptr)
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{
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size_t i;
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int sign;
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long long int number;
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i = 0;
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sign = ft_check_sign(nptr, &i);
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number = 0;
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while (nptr[i])
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{
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if (nptr[i] >= '0' && nptr[i] <= '9')
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number = (number * 10) + nptr[i] - '0';
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else
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break ;
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i++;
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}
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return (sign * number);
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}
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