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correction memcpy pour le cas ou dst et src sont nuls

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Hugo LAMY
2019-11-28 13:51:50 +01:00
parent feede2804f
commit b542d8adc0
152 changed files with 3206 additions and 5 deletions
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52
srcs/ft_substr.c Normal file
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@@ -0,0 +1,52 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_substr.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: hulamy <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/11/25 14:01:58 by hulamy #+# #+# */
/* Updated: 2019/11/27 19:54:09 by hulamy ### ########.fr */
/* */
/* ************************************************************************** */
/*
** create a copy of a portion of s, begining at start and of length len
*/
/*
** #include <libc.h>
**
** char *ft_substr(char const *s, unsigned int start, size_t len);
**
** int main(int ac, char **av)
** {
** char *str;
**
** if (ac != 4)
** return (0);
** str = ft_substr(av[1], atoi(av[2]), atoi(av[3]));
** printf("%s\n",str);
** return (0);
** }
*/
#include "libft.h"
char *ft_substr(char const *s, unsigned int start, size_t len)
{
char *str;
size_t i;
if (!s)
return (NULL);
if (ft_strlen(s) < start)
return ("");
if (!(str = (char *)malloc(sizeof(char) * (len + 1))))
return (NULL);
i = 0;
while (i < len && s[start])
str[i++] = s[start++];
str[i] = '\0';
return (str);
}