get_next_line_utils_bonus.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils_bonus.c                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: faubert <marvin@42.fr>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/10/30 18:45:22 by faubert           #+#    #+#             */
/*   Updated: 2020/10/30 18:45:25 by faubert          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

size_t		ft_nl_pos(const char *str)
{
	size_t		i;

	if (!str)
		return (0);
	i = 0;
	while (str[i] && str[i] != '\n')
		i++;
	return (i);
}

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

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

char		*ft_strdup(const char *src)
{
	char		*str;
	size_t		i;

	if (!src || !(str = malloc((sizeof(char) * ft_strlen(src)) + 1)))
		return (NULL);
	i = 0;
	while (src[i])
	{
		str[i] = src[i];
		i++;
	}
	str[i] = '\0';
	return (str);
}

char		*ft_substr(const char *s, size_t start, size_t len)
{
	char		*str;
	size_t		i;

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

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

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