Emery Hemingway
22327b43ae
Refactor the graphical terminal server to internally represent characters as 16-bit codepoints and handle the duplex terminal stream as UTF-8. - Make the Codepoint class printable to the Output interface - Decode data received at the Terminal session from UTF-8 to a 16-bit character - Pass 16-bit characters through terminal decoder and char-cell arrays - Send Unicode through terminal session in a burst of UTF-8 bytes Fix #3148
75 lines
1.5 KiB
C++
75 lines
1.5 KiB
C++
/*
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* \brief Buffer for storing decoded characters
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* \author Norman Feske
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* \date 2011-06-06
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*/
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/*
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* Copyright (C) 2011-2019 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _TERMINAL__READ_BUFFER_H_
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#define _TERMINAL__READ_BUFFER_H_
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#include <os/ring_buffer.h>
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#include <util/utf8.h>
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#include <base/signal.h>
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namespace Terminal {
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class Read_buffer;
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enum { READ_BUFFER_SIZE = 4096 };
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}
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class Terminal::Read_buffer : public Genode::Ring_buffer<unsigned char, READ_BUFFER_SIZE>
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{
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private:
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Genode::Signal_context_capability _sigh_cap { };
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public:
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/**
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* Register signal handler for read-avail signals
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*/
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void sigh(Genode::Signal_context_capability cap) { _sigh_cap = cap; }
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/**
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* Add element into read buffer and emit signal
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*/
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void add(unsigned char c)
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{
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Genode::Ring_buffer<unsigned char, READ_BUFFER_SIZE>::add(c);
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if (_sigh_cap.valid())
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Genode::Signal_transmitter(_sigh_cap).submit();
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}
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void add(Codepoint code)
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{
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/* send Unicode in a burst of UTF-8 */
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Genode::String<5> utf8(code);
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char const *str = utf8.string();
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while (*str)
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Genode::Ring_buffer<unsigned char, READ_BUFFER_SIZE>::add(*str++);
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if (_sigh_cap.valid())
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Genode::Signal_transmitter(_sigh_cap).submit();
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}
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void add(char const *str)
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{
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while (*str)
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add(*str++);
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}
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};
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#endif /* _TERMINAL__READ_BUFFER_H_ */
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