get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ael-haib <ael-haib@student.42madrid.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/07/11 17:16:57 by ael-haib          #+#    #+#             */
/*   Updated: 2024/07/11 17:17:01 by ael-haib         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

size_t	ft_strlen(const char *s)
{
	size_t	len;

	len = 0;
	while (s[len] != '\0')
		len++;
	return (len);
}

char	*ft_strchr(const char *s, int c)
{
	if (!s)
		return (NULL);
	c = (unsigned char)c;
	while ((*s != '\0') && (*s != c))
		s++;
	if (*s == c)
		return ((char *)s);
	return (NULL);
}

void	*ft_memcpy(void *dst, const void *src, size_t n)
{
	size_t	i;

	if (!dst && !src)
		return (NULL);
	i = 0;
	while (i < n)
	{
		*((char *)dst + i) = *((char *)src + i);
		i++;
	}
	return (dst);
}

char	*ft_substr(char const *s, unsigned int start, size_t len)
{
	char	*str;
	size_t	len_s;

	if (!s)
		return (NULL);
	len_s = ft_strlen(s);
	if (start > len_s)
		len = 0;
	if (len_s < len)
		len = len_s - start;
	str = (char *)malloc((len + 1) * sizeof(char));
	if (!str)
		return (NULL);
	ft_memcpy(str, s + start, len);
	str[len] = '\0';
	return (str);
}