mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 07:15:08 +00:00
85da8cbb07
This fixes issues with carriage return sequences. Before, using <CR><NUL> as the return sequence wouldn't work at all, and when using <CR><LF> there was an extra newline after every newline. After this patch, the behaviour should be closer to the Telnet RFC.
72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/String.h>
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#include <AK/Types.h>
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#include "Parser.h"
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void Parser::write(StringView data)
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{
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for (size_t i = 0; i < data.length(); i++) {
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u8 ch = data[i];
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switch (m_state) {
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case State::Free:
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switch (ch) {
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case IAC:
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m_state = State::ReadCommand;
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break;
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case '\r':
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if (on_data)
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on_data("\n");
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break;
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case '\0':
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case '\n':
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// Ignore.
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break;
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default:
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if (on_data)
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on_data(StringView(&ch, 1));
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break;
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}
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break;
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case State::ReadCommand:
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switch (ch) {
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case IAC: {
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m_state = State::Free;
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if (on_data)
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on_data("\xff");
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break;
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}
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case CMD_WILL:
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case CMD_WONT:
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case CMD_DO:
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case CMD_DONT:
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m_command = ch;
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m_state = State::ReadSubcommand;
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break;
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default:
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m_state = State::Error;
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if (on_error)
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on_error();
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break;
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}
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break;
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case State::ReadSubcommand: {
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auto command = m_command;
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m_command = 0;
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m_state = State::Free;
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if (on_command)
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on_command({ command, ch });
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break;
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}
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case State::Error:
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// ignore everything
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break;
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}
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}
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}
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