get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: akdemir <akdemir@student.42istanbul.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/07/27 16:39:11 by akdemir           #+#    #+#             */
/*   Updated: 2023/08/02 16:58:40 by akdemir          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

int	ft_strlen(const char *str)
{
	int	i;

	if (!str)
		return (0);
	i = 0;
	while (str[i])
		i++;
	return (i);
}

int	nlcheck(const char *s)
{
	int	i;

	if (!s)
		return (0);
	i = 0;
	while (s[i])
	{
		if (s[i] == '\n')
			return (1);
		i++;
	}
	return (0);
}

char	*ft_substr(char *s, int start, int len)
{
	char	*p;
	int		i;
	int		slen;

	if (!s)
		return (NULL);
	slen = ft_strlen(s);
	if (len > slen - start)
		len = slen - start;
	p = (char *)malloc(sizeof(char) * (len + 1));
	if (!p)
		return (NULL);
	i = 0;
	while (s[start + i] && i < len)
	{
		p[i] = s[start + i];
		i++;
	}
	p[i] = '\0';
	return (p);
}

char	*ft_strjoin(char *s1, char *s2)
{
	char	*str;
	int		i;
	int		j;

	if (!s1)
	{
		s1 = (char *)malloc(sizeof(char) * 1);
		*s1 = '\0';
	}
	str = (char *)malloc(sizeof(char) * (ft_strlen(s1) + ft_strlen(s2) + 1));
	if (!str)
		return (NULL);
	i = -1;
	while (s1[++i])
		str[i] = s1[i];
	j = -1;
	while (s2[++j])
		str[i + j] = s2[j];
	str[i + j] = '\0';
	free(s1);
	return (str);
}