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ft_strjoin.c
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ft_strjoin.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_strjoin.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: akyoshid <akyoshid@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/11/20 11:10:49 by akyoshid #+# #+# */
/* Updated: 2023/11/20 11:22:25 by akyoshid ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
// === DESCRIPTION ===
// Allocates and returns a new string by combining 's1' and 's2'.
// === RETURN VALUE ===
// if (s1 == NULL || s2 == NULL) → Return NULL.
char *ft_strjoin(char const *s1, char const *s2)
{
char *buff;
size_t s1_len;
size_t s2_len;
if (s1 == NULL || s2 == NULL)
return (NULL);
s1_len = ft_strlen(s1);
s2_len = ft_strlen(s2);
buff = malloc((s1_len + s2_len + 1) * sizeof(char));
if (buff == NULL)
return (NULL);
ft_memcpy(buff, s1, s1_len);
ft_memcpy(buff + s1_len, s2, s2_len);
buff[s1_len + s2_len] = '\0';
return (buff);
}
// int main(void)
// {
// char str1[] = "123";
// char str2[] = "456";
// char *ptr;
// ptr = ft_strjoin(str1, str2);
// printf("%s\n", ptr);
// return (0);
// }