50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_atoi.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: mcolonna <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/08/28 17:45:41 by mcolonna #+# #+# */
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/* Updated: 2023/10/09 12:03:52 by mcolonna ### ########.fr */
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/* */
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/* ************************************************************************** */
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static int is_in(char c, char *chars)
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{
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int i;
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i = 0;
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while (chars[i])
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{
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if (c == chars[i])
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return (1);
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i++;
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}
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return (0);
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}
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int ft_atoi(const char *nptr)
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{
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int sign;
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int i;
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int r;
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sign = 1;
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i = 0;
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r = 0;
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while (is_in(nptr[i], " \f\n\r\t\v"))
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i++;
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if (is_in(nptr[i], "+-"))
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{
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if (nptr[i] == '-')
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sign *= -1;
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i++;
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}
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while (is_in(nptr[i], "0123456789"))
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{
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r = r * 10 + (nptr[i] - '0');
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i++;
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}
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return (r * sign);
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}
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