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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 <Kernel/Console.h>
#include <Kernel/IO.h>
#include <Kernel/kstdio.h>
// Bytes output to 0xE9 end up on the Bochs console. It's very handy.
#define CONSOLE_OUT_TO_E9
static Console* s_the;
Console& Console::the()
{
ASSERT(s_the);
return *s_the;
}
bool Console::is_initialized()
{
return s_the != nullptr;
}
Console::Console()
: CharacterDevice(5, 1)
{
s_the = this;
}
Console::~Console()
{
}
bool Console::can_read(const Kernel::FileDescription&, size_t) const
{
return false;
}
ssize_t Console::read(Kernel::FileDescription&, size_t, u8*, ssize_t)
{
// FIXME: Implement reading from the console.
// Maybe we could use a ring buffer for this device?
return 0;
}
ssize_t Console::write(Kernel::FileDescription&, size_t, const u8* data, ssize_t size)
{
if (!size)
return 0;
if (!m_implementation)
return 0;
for (ssize_t i = 0; i < size; ++i)
put_char(data[i]);
return size;
}
void Console::put_char(char ch)
{
#ifdef CONSOLE_OUT_TO_E9
//if (ch != 27)
IO::out8(0xe9, ch);
#endif
m_logbuffer.enqueue(ch);
if (m_implementation)
m_implementation->on_sysconsole_receive(ch);
}
ConsoleImplementation::~ConsoleImplementation()
{
}
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