input_checker.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   input_checker.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rocky <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/06/11 16:51:08 by rocky             #+#    #+#             */
/*   Updated: 2024/06/11 16:53:40 by rocky            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "tokens.h"
 
void    free_op_strings(t_loop_data *data, char *tail, char *new)
{
    free(data->trimmed_input);
    free(new);
    free(tail);
}
 
int check_operators(t_loop_data *loop_data)
{
    char    *input;
    char    *tail;
    char    *new_input;
    char    *final_input;
 
    input = loop_data->trimmed_input;
    if (*input == '&' || *input == '|')
        return (1);
    while (*input)
    {
        if (*input == '|' && *(input + 1) == '\0')
        {
            tail = readline("> ");
            if (tail == NULL)
                break ;
            new_input = ft_strcat_const(loop_data->trimmed_input, " ");
            final_input = ft_strcat_const(new_input, tail);
            free_op_strings(loop_data, tail, new_input);
            loop_data->trimmed_input = final_input;
            free(final_input);
            break ;
        }
        input++;
    }
    return (0);
}
 
int check_redirections(const char *str)
{
    int single_quotes;
    int double_quotes;
 
    single_quotes = 0;
    double_quotes = 0;
    while (*str)
    {
        if (*str == '\'')
            single_quotes++;
        if (*str == '\"')
            double_quotes++;
        if ((!(single_quotes % 2) && !(double_quotes % 2))
            && (*str == '>' || *str == '<'))
        {
            if (!valid_operator(&str))
                return (1);
        }
        else
            str++;
    }
    return (0);
}
 
int check_open_quotes(const char *str)
{
    int single_quote_open;
    int double_quote_open;
 
    single_quote_open = 0;
    double_quote_open = 0;
    while (*str)
    {
        if (*str == '\'' && !double_quote_open)
        {
            single_quote_open = !single_quote_open;
        }
        else if (*str == '"' && !single_quote_open)
            double_quote_open = !double_quote_open;
        str++;
    }
    return (single_quote_open || double_quote_open);
}
 
int input_error_checks(t_loop_data *loop_data)
{
    const char  *str = loop_data->trimmed_input;
 
    if (check_redirections(str))
        ft_printf("Input error: invalid redirection.\n");
    else if (check_operators(loop_data))
        ft_printf("Input error: invalid operator.\n");
    else if (check_open_quotes(str))
        ft_printf("Input error: open quote.\n");
    else
        return (0);
    return (1);
}