/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   stream.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mcolonna <mcolonna@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/02 14:08:10 by mcolonna          #+#    #+#             */
/*   Updated: 2024/10/17 16:02:33 by mcolonna         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "stream.h"
#include <stdlib.h>

void	read_expected_string(const char *str, t_stream *stream, bool *err)
{
	int	i;

	if (*err)
		return ;
	read_blank(stream);
	i = 0;
	while (str[i])
	{
		if (str[i] != stream->str[stream->i])
		{
			*err = true;
			return ;
		}
		i++;
		stream->i++;
	}
	return ;
}

/// @brief Check if a character is a digit.
/// @param c Character to check.
/// @return true if the character is a digit, false if not.
///         false if the character is '\0'.
static bool	is_digit(char c)
{
	return (c >= '0' && c <= '9');
}

void	read_unsigned(unsigned int *dest, t_stream *stream, bool *err)
{
	int	r;

	if (*err)
		return ;
	read_blank(stream);
	if (!is_digit(stream->str[stream->i]))
	{
		*err = true;
		return ;
	}
	r = 0;
	while (is_digit(stream->str[stream->i]))
	{
		r = r * 10 + stream->str[stream->i] - '0';
		stream->i++;
	}
	*dest = r;
}

void	read_until(char c, char **dest, t_stream *stream, bool *err)
{
	int	len;
	int	i;

	if (*err)
		return ;
	read_blank(stream);
	len = 0;
	while (stream->str[stream->i + len] && stream->str[stream->i + len] != c)
		len++;
	*dest = malloc((len + 1) * sizeof(char));
	if (!*dest)
	{
		*err = true;
		return ;
	}
	i = 0;
	while (stream->str[stream->i] && stream->str[stream->i] != c)
	{
		(*dest)[i] = stream->str[stream->i];
		i++;
		stream->i++;
	}
	(*dest)[i] = '\0';
}

bool	read_blank(t_stream *stream)
{
	if (stream->str[stream->i] != ' '
		&& stream->str[stream->i] != '\t')
		return (false);
	while (
		stream->str[stream->i] == ' '
		|| stream->str[stream->i] == '\t'
	)
		stream->i++;
	return (true);
}