42_minishell/syntax/syntax.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   syntax.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/21 13:00:05 by cchauvet          #+#    #+#             */
/*   Updated: 2023/03/30 12:45:18 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "../libftx/libftx.h"
#include "../utils/utils.h"

static int	ft_quote_verif(const char *str)
{
	if (ft_is_in_quote(str, ft_strlen(str)))
	{
		ft_eprintf("minishell: Quote is not closed\n");
		return (1);
	}
	else
		return (0);
}

static int	ft_pipe_is_alone(const char *str)
{
	ssize_t	i;
	int		check;

	check = 0;
	i = -1;
	while (str[++i] != '\0')
	{
		while (str[i] == ' ' || ft_is_in_quote(str, i))
			i++;
		if (str[i] == '\0')
			break ;
		if (str[i] != '|')
			check = 1;
		else
		{
			if (check == 0)
				break ;
			check = 0;
		}
	}
	if (check == 0)
		ft_eprintf("minishell: Pipe must be followed and %s",
			"preced by a command or redirection\n");
	return (check == 0);
}

static int	ft_special_char_dub(const char *str)
{
	size_t	i;
	size_t	y;

	i = 0;
	while (str[i] != '\0')
	{
		while (ft_is_in_quote(str, i))
			i++;
		if (ft_is_in("|<>", str[i]))
		{
			y = 0;
			while (str[i] == str[i + y])
				y++;
			if ((y > 2 && (str[i] == '>' || str[i] == '<'))
				|| (y > 1 && str[i] == '|'))
			{
				ft_eprintf("minishell: too many %s in a row\n", str);
				return (1);
			}
			i = i + y;
		}
		else if (str[i] != '\0')
			i++;
	}
	return (0);
}

static int	ft_empty_verif(const char *str)
{
	size_t	i;

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

int	ft_syntax_verif(t_data *data, const char *str)
{
	if (ft_empty_verif(str))
		return (1);
	if (ft_quote_verif(str)
		|| ft_pipe_is_alone(str)
		|| ft_special_char_dub(str))
	{
		data->exit_code = 2;
		return (1);
	}
	return (0);
}