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terminal: support Latin-1 subset of UTF-8

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This commit is contained in:
Norman Feske 2018-03-16 13:54:02 +01:00 committed by Christian Helmuth
parent 219c2fa2e1
commit cb188f5f93
1 changed files with 21 additions and 4 deletions
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25
repos/gems/src/server/terminal/session.h
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@ -15,6 +15,7 @@
#define _SESSION_H_ #define _SESSION_H_
/* Genode includes */ /* Genode includes */
#include <util/utf8.h>
#include <root/component.h> #include <root/component.h>
#include <terminal_session/terminal_session.h> #include <terminal_session/terminal_session.h>
@ -86,7 +87,7 @@ class Terminal::Session_component : public Rpc_object<Session, Session_component
/* read data, block on first byte if needed */ /* read data, block on first byte if needed */
unsigned num_bytes = 0; unsigned num_bytes = 0;
unsigned char *dst = _io_buffer.local_addr<unsigned char>(); unsigned char *dst = _io_buffer.local_addr<unsigned char>();
size_t dst_size = min(_io_buffer.size(), dst_len); size_t dst_size = min(_io_buffer.size(), dst_len);
while (!_read_buffer.empty() && num_bytes < dst_size) while (!_read_buffer.empty() && num_bytes < dst_size)
dst[num_bytes++] = _read_buffer.get(); dst[num_bytes++] = _read_buffer.get();
@ -96,10 +97,26 @@ class Terminal::Session_component : public Rpc_object<Session, Session_component
size_t _write(size_t num_bytes) size_t _write(size_t num_bytes)
{ {
unsigned char *src = _io_buffer.local_addr<unsigned char>(); char const *src = _io_buffer.local_addr<char const>();
for (unsigned i = 0; i < num_bytes; i++) unsigned const max = min(num_bytes, _io_buffer.size());
_character_consumer.consume_character(src[i]);
unsigned i = 0;
for (Utf8_ptr utf8(src); utf8.complete() && i < max; ) {
_character_consumer.consume_character(utf8.codepoint().value);
i += utf8.length();
utf8 = Utf8_ptr(src + i);
}
/* consume trailing zero characters */
for (; src[i] == 0 && i < num_bytes; i++);
/* we don't support UTF-8 sequences split into multiple writes */
if (i != num_bytes) {
warning("truncated UTF-8 sequence");
for (unsigned j = i; j < num_bytes; j++)
warning("(unhandled value ", Hex(src[j]), ")");
}
return num_bytes; return num_bytes;
} }