83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_strcat.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: lfirmin <lfirmin@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/11/05 02:21:14 by lfirmin #+# #+# */
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/* Updated: 2024/11/05 08:19:47 by lfirmin ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "libft.h"
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int should_add_space(char *dest, char *src)
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{
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size_t dest_len;
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size_t src_len;
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dest_len = ft_strlen(dest);
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src_len = ft_strlen(src);
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if (dest_len > 0 && src_len > 0)
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{
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if (dest[dest_len - 1] != ' ' && src[0] != ' ')
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return (1);
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}
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return (0);
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}
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char *create_new_str(char *dest, char *src, int add_space)
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{
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size_t dest_len;
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size_t src_len;
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char *new_str;
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dest_len = ft_strlen(dest);
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src_len = ft_strlen(src);
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if (add_space == 1)
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new_str = malloc(sizeof(char) * (dest_len + src_len + 2));
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else
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new_str = malloc(sizeof(char) * (dest_len + src_len + 1));
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if (!new_str)
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return (NULL);
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return (new_str);
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}
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void fill_new_str(char *new_str, char *dest, char *src, int add_space)
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{
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size_t dest_len;
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size_t src_len;
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dest_len = ft_strlen(dest);
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src_len = ft_strlen(src);
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if (add_space == 1)
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{
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ft_memset(new_str, 0, dest_len + src_len + 2);
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ft_strlcpy(new_str, dest, dest_len + 1);
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new_str[dest_len] = ' ';
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ft_strlcpy(new_str + dest_len + 1, src, src_len + 1);
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}
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else
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{
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ft_memset(new_str, 0, dest_len + src_len + 1);
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ft_strlcpy(new_str, dest, dest_len + 1);
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ft_strlcpy(new_str + dest_len, src, src_len + 1);
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}
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}
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char *ft_strcat(char *dest, char *src)
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{
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char *new_str;
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int add_space;
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if (!dest || !src)
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return (NULL);
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add_space = should_add_space(dest, src);
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new_str = create_new_str(dest, src, add_space);
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if (!new_str)
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return (NULL);
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fill_new_str(new_str, dest, src, add_space);
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free(dest);
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return (new_str);
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}
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