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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Function.h>
#include <AK/String.h>
#include <AK/Types.h>
#include "Parser.h"
void Parser::write(const StringView& data)
{
for (size_t i = 0; i < data.length(); i++) {
u8 ch = data[i];
switch (m_state) {
case State::Free:
switch (ch) {
case IAC:
m_state = State::ReadCommand;
break;
case '\r':
if (on_data)
on_data("\n");
break;
default:
if (on_data)
on_data(StringView(&ch, 1));
break;
}
break;
case State::ReadCommand:
switch (ch) {
case IAC: {
m_state = State::Free;
if (on_data)
on_data("\xff");
break;
}
case CMD_WILL:
case CMD_WONT:
case CMD_DO:
case CMD_DONT:
m_command = ch;
m_state = State::ReadSubcommand;
break;
default:
m_state = State::Error;
if (on_error)
on_error();
break;
}
break;
case State::ReadSubcommand: {
auto command = m_command;
m_command = 0;
m_state = State::Free;
if (on_command)
on_command({ command, ch });
break;
}
case State::Error:
// ignore everything
break;
}
}
}
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