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first commit of v2 ft_printf

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David GAILLETON
2025-11-17 11:26:34 +01:00
commit 506d90d9c1
49 changed files with 1626 additions and 0 deletions
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62
42-libft/ft_atoi.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dgaillet <dgaillet@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/11/05 19:07:51 by dgaillet #+# #+# */
/* Updated: 2025/11/12 14:17:18 by dgaillet ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
static long long int str_to_ll(const char *nptr)
{
int i;
long long int res;
i = 0;
res = 0;
while (ft_isdigit(nptr[i]))
{
if (res * 10 < res && res > 0)
return (-1);
res = (10 * res) + nptr[i] - 48;
i++;
}
return (res);
}
static long long int ft_atoll(const char *nptr)
{
int i;
long long int res;
i = 0;
res = 0;
if (!nptr[0])
return (0);
while ((nptr[i] >= 9 && nptr[i] <= 13) || nptr[i] == ' ')
i++;
if (nptr[i] == '-' && ft_isdigit(nptr[i + 1]))
{
res = -1 * ft_atoll(&nptr[i] + 1);
if ((nptr[i + 1] != '1' && res == 1)
|| (nptr[i + 1] == '1' && ft_isdigit(nptr[i + 2]) && res == 1))
return (0);
return (res);
}
else if (nptr[i] == '+' && ft_isdigit(nptr[i + 1]))
i++;
return (str_to_ll(&nptr[i]));
}
int ft_atoi(const char *nptr)
{
int res;
res = (int) ft_atoll(nptr);
return (res);
}