get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: fvon-nag <fvon-nag@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/01/06 09:52:22 by fvon-nag          #+#    #+#             */
/*   Updated: 2023/01/07 10:05:25 by fvon-nag         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

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

	i = 0;
	if (!str)
		return (0x0);
	while (str[i] != '\0')
	{
	i++;
	}
	return (i);
}

char	*ft_strchr(char *c, int i)
{
	int	j;

	j = 0;
	if (!c)
		return (NULL);
	if (i == '\0')
		return ((char *)&c[ft_strlen(c)]);
	while (c[j] != '\0')
	{
		if (c[j] == (char) i)
			return ((char *)&c[j]);
		j++;
	}
	return (NULL);
}

char	*ft_strjoin(char *str, char *buff)
{
	size_t	i;
	size_t	j;
	char	*nstr;

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