get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yabtaour <[email protected]>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/12/07 10:57:14 by yabtaour          #+#    #+#             */
/*   Updated: 2021/12/07 15:57:13 by yabtaour         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
#include "get_next_line.h"

size_t	ft_strlen(char *str)
{
	size_t	i;

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

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

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

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