/*
 * Copyright 2003-2018 The Music Player Daemon Project
 * http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "Escape.hxx"

static constexpr bool
MustEscape(char ch) noexcept
{
	return ch == '"' || ch == '\'' || ch == '\\';
}

std::string
EscapeFilterString(const std::string &src) noexcept
{
	std::string result;
	result.reserve(src.length() + 16);

	for (char ch : src) {
		if (MustEscape(ch))
			result.push_back('\\');
		result.push_back(ch);
	}

	return result;
}