ft_substr.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_substr.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tspoof <tspoof@student.hive.fi>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/11/03 16:53:11 by tspoof            #+#    #+#             */
/*   Updated: 2022/11/29 14:58:35 by tspoof           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "libft.h"
 
static size_t   ft_min(size_t a, size_t b)
{
    if (a < b)
        return (a);
    return (b);
}
 
char    *ft_substr(char const *s, unsigned int start, size_t len)
{
    size_t  s_len;
    size_t  sub_len;
    char    *ptr;
 
    if (!s)
        return (NULL);
    s_len = ft_strlen(s);
    if (start < s_len)
        sub_len = ft_min(s_len, len);
    else
        sub_len = 0;
    ptr = (char *)ft_calloc(sub_len + 1, sizeof(char));
    if (!ptr)
        return (NULL);
    ft_strlcpy(ptr, s + start, sub_len + 1);
    return (ptr);
}