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ft_rotx.c
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ft_rotx.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_rotx.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dfonarev <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/02/25 17:48:27 by dfonarev #+# #+# */
/* Updated: 2019/02/25 19:55:44 by dfonarev ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
char *ft_rotx(char *s, int x)
{
int i;
int ul;
char c;
char *str;
if (!s || x < 0 || !(str = ft_strnew(ft_strlen(s))))
return (NULL);
i = 0;
while (s[i])
{
if ((s[i] >= 'A' && s[i] <= 'Z') || (s[i] >= 'a' && s[i] <= 'z'))
{
ul = (s[i] >= 'A' && s[i] <= 'Z') ? 64 : 96;
c = (s[i] - ul + x) % 26;
c = (c == 0) ? 26 + ul : c + ul;
str[i] = c;
}
else
str[i] = s[i];
i++;
}
return (str);
}