53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_substr.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: hulamy <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/11/25 14:01:58 by hulamy #+# #+# */
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/* Updated: 2019/11/28 16:32:34 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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/*
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** create a copy of a portion of s, begining at start and of length len
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*/
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/*
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** #include <libc.h>
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**
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** char *ft_substr(char const *s, unsigned int start, size_t len);
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**
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** int main(int ac, char **av)
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** {
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** char *str;
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**
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** if (ac != 4)
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** return (0);
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** str = ft_substr(av[1], atoi(av[2]), atoi(av[3]));
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** printf("%s\n",str);
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** return (0);
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** }
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*/
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#include "libft.h"
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char *ft_substr(char const *s, unsigned int start, size_t len)
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{
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char *str;
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size_t i;
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if (!s)
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return (NULL);
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if (ft_strlen(s) < start)
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return (ft_strdup(""));
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if (!(str = (char *)malloc(sizeof(char) * (len + 1))))
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return (NULL);
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i = 0;
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while (i < len && s[start])
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str[i++] = s[start++];
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str[i] = '\0';
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return (str);
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}
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