42_minishell/builtins/echo.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   echo.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: erey-bet <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/17 13:09:08 by erey-bet          #+#    #+#             */
/*   Updated: 2023/02/21 21:45:38 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "../minishell.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, int i)
{
	int	y;

	y = 0;
	if (str[i] == '-')
	{
		while (!is_space(str[i]) || (str[i + 1] == '-' ))
		{
			i++;
			if (is_space(str[i]))
			{
				y = i;
				*check = 1;
			}
			else if (str[i] == '-' && str[i - 1] != '-')
				;
			else if (str[i] != 'n')
				break ;
		}
		i = y;
		while (is_space(str[i]))
			i++;
	}
	return (i);
}


char *conca(char **strings)
{
	int len;
	char *result;
	char *p;
	int i;

	i = -1;
	while (strings[++i] != NULL)
		len += strlen(strings[i]);
	result = (char *) ft_calloc(len * 2 + 1, sizeof(char));
	if (result == NULL)
		return NULL;
	i = 0;
	while (strings[i] != NULL)
	{
		ft_strncpy(result + ft_strlen(result), strings[i], ft_strlen(strings[i]));
		ft_strncpy(result + ft_strlen(result), " ", 1);
		i++;
	}
	return (result);
}


int	echo(int fd, char **strs)
{
	int		check;
	int		i;
	char	*str;

	str = conca(strs);
	check = 0;
	i = 0;
	while (is_space(str[i]))
		i++;
	i = check_argument(str, &check, i);
	while (str[i])
		ft_putchar_fd(str[i++], fd);
	if (!check)
		write(fd, "\n", 1);
	return (0);
}