maxishell
Implementation of a shell for Linux-like systems
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ft_substr.c
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1/* ************************************************************************** */
2/* */
3/* ::: :::::::: */
4/* ft_substr.c :+: :+: :+: */
5/* +:+ +:+ +:+ */
6/* By: rmikhayl <rmikhayl@student.42london.c +#+ +:+ +#+ */
7/* +#+#+#+#+#+ +#+ */
8/* Created: 2023/12/17 17:25:27 by rmikhayl #+# #+# */
9/* Updated: 2023/12/17 17:25:27 by rmikhayl ### ########.fr */
10/* */
11/* ************************************************************************** */
12
13#include "libft.h"
14
15/* *************************** ft_substr ************************************ */
16/* Extracts a substring from 's' starting at the specified 'start' */
17/* position and up to 'len' characters. Returns a new string with the */
18/* extracted content or NULL if memory allocation fails or 'start' is */
19/* out of bounds. */
20/* */
21/* In layman's terms: It's like cutting a portion of a sentence from a */
22/* specific point and up to a certain length to create a new shorter */
23/* sentence. If something goes wrong or 'start' is too far away, you get */
24/* nothing. */
25/* ************************************************************************** */
26
27char *ft_substr(char const *s, unsigned int start, size_t len)
28{
29 char *new_str;
30 size_t i;
31 size_t j;
32 size_t size;
33
34 size = ft_strlen(s) - start;
35 if (start > ft_strlen(s))
36 size = 0;
37 else if (size > len)
38 size = len;
39 new_str = (char *)malloc(size + 1);
40 if (!s || !new_str)
41 return (0);
42 i = start;
43 j = 0;
44 while (i < ft_strlen(s) && j < len)
45 new_str[j++] = s[i++];
46 new_str[j] = '\0';
47 return (new_str);
48}
ft_substr
char * ft_substr(char const *s, unsigned int start, size_t len)
Definition ft_substr.c:27
ft_strlen
size_t ft_strlen(const char *s)
Definition ft_strlen.c:15