42_minishell/builtins/echo.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   echo.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: erey-bet <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/17 13:09:08 by erey-bet          #+#    #+#             */
/*   Updated: 2023/04/11 14:57:00 by erey-bet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "./builtins_private.h"

int	is_space(char c)
{
	return (c == ' ' || c == '\f' || c == '\v' || c == '\t'
		|| c == '\r' || c == '\n');
}

int	check_argument(char *str, int *check_backslash_n)
{
	int	i;

	i = -1;
	while (str[++i])
		if (str[i] != '-' && str[i] != 'n')
			return (1);
	if (ft_strnstr(str, "n", ft_strlen(str)) && str[0] == '-')
		*check_backslash_n = 1;
	else
		return (1);
	return (0);
}

int	echo(int fd, char **strs)
{
	int		check_backslash_n;
	int		check_start_write;
	int		i;
	int		y;

	check_backslash_n = 0;
	check_start_write = 0;
	i = -1;
	while (strs[++i])
	{
		y = -1;
		while (is_space(strs[i][++y]))
			;
		if (check_start_write == 1
			|| check_argument(strs[i], &check_backslash_n))
		{
			check_start_write = 1;
			ft_putstr_fd(strs[i], fd);
			if (strs[i + 1] != NULL)
				write(fd, " ", 1);
		}
	}
	if (!check_backslash_n)
		write(fd, "\n", 1);
	return (0);
}