82 lines
1.4 KiB
C
82 lines
1.4 KiB
C
/*
|
|
** 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);
|
|
**
|
|
** char *ft_strdup(const char *src)
|
|
** {
|
|
** int i;
|
|
** char *str;
|
|
**
|
|
** i = 0;
|
|
** while (src[i] != '\0')
|
|
** i++;
|
|
** if (!(str = (char*)malloc(sizeof(*str) * (i + 1))))
|
|
** return (NULL);
|
|
** while (i-- >= 0)
|
|
** str[i + 1] = src[i + 1];
|
|
** return (str);
|
|
** }
|
|
**
|
|
** int ft_strncmp(const char *s1, const char *s2, size_t n)
|
|
** {
|
|
** size_t i;
|
|
** int res;
|
|
**
|
|
** i = 0;
|
|
** res = 0;
|
|
** while (s1[i] && s1[i] == s2[i] && i < n - 1)
|
|
** i++;
|
|
** if (n != 0)
|
|
** res = (unsigned char)s1[i] - (unsigned char)s2[i];
|
|
** return (res);
|
|
** }
|
|
**
|
|
** size_t ft_strlen(const char *str)
|
|
** {
|
|
** size_t i;
|
|
**
|
|
** i = 0;
|
|
** while (str[i])
|
|
** i++;
|
|
** return (i);
|
|
** }
|
|
**
|
|
** int main(int ac, char **av)
|
|
** {
|
|
** char *str;
|
|
**
|
|
** str = "";
|
|
** size_t size = 0;
|
|
** char *ret = ft_substr(str, 5, size);
|
|
** if (!ft_strncmp(ret, str + 5, size))
|
|
** printf("gloups\n");
|
|
** free(ret);
|
|
** 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 (ft_strdup(""));
|
|
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);
|
|
}
|