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base c lib without external lib

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This commit is contained in:
David Gailleton
2025-11-05 19:25:22 +01:00
parent e06b98052a
commit 697e044d7e
19 changed files with 445 additions and 13 deletions
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29
ft_atoi.c Normal file
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@@ -0,0 +1,29 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/11/05 19:07:51 by dgaillet #+# #+# */
/* Updated: 2025/11/05 19:17:34 by dgaillet ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *nptr)
{
int i;
int res;
i = 0;
res = 0;
if (!nptr[0])
return (0);
if (nptr[0] == '-' && ft_isdigit(nptr[1]))
return (-1 * ft_atoi(nptr + 1));
while (ft_isdigit(nptr[i++]))
res = (10 * res) + (nptr[i] - '0');
return (res);
}