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tcp_terminal: fix handling of read characters 

Fixes #1167
This commit is contained in:
Alexander Boettcher 2014-06-04 15:28:32 +02:00 committed by Christian Helmuth
parent aae541f9c0
commit 0a8c419dee
1 changed files with 16 additions and 8 deletions
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24
repos/gems/src/server/tcp_terminal/main.cc
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@ -73,6 +73,7 @@ class Open_socket : public Genode::List<Open_socket>::Element
enum { READ_BUF_SIZE = 4096 };
char _read_buf[READ_BUF_SIZE];
Genode::size_t _read_buf_bytes_used;
Genode::size_t _read_buf_bytes_read;
/**
* Establish remote connection
@ -196,13 +197,18 @@ class Open_socket : public Genode::List<Open_socket>::Element
}
/**
* Flush internal read buffer into destination buffer
* Read out internal read buffer and copy into destination buffer.
*/
Genode::size_t flush_read_buffer(char *dst, Genode::size_t dst_len)
Genode::size_t read_buffer(char *dst, Genode::size_t dst_len)
{
Genode::size_t num_bytes = Genode::min(dst_len, _read_buf_bytes_used);
Genode::memcpy(dst, _read_buf, num_bytes);
_read_buf_bytes_used = 0;
Genode::size_t num_bytes = Genode::min(dst_len, _read_buf_bytes_used -
_read_buf_bytes_read);
Genode::memcpy(dst, _read_buf + _read_buf_bytes_read, num_bytes);
_read_buf_bytes_read += num_bytes;
if (_read_buf_bytes_read >= _read_buf_bytes_used)
_read_buf_bytes_used = _read_buf_bytes_read = 0;
return num_bytes;
}
@ -359,7 +365,9 @@ Open_socket_pool *open_socket_pool()
Open_socket::Open_socket(int tcp_port)
: _listen_sd(_remote_listen(tcp_port)), _sd(-1)
:
_listen_sd(_remote_listen(tcp_port)), _sd(-1),
_read_buf_bytes_used(0), _read_buf_bytes_read(0)
{
open_socket_pool()->insert(this);
}
@ -403,8 +411,8 @@ namespace Terminal {
Genode::size_t _read(Genode::size_t dst_len)
{
Genode::size_t num_bytes =
flush_read_buffer(_io_buffer.local_addr<char>(),
Genode::min(_io_buffer.size(), dst_len));
read_buffer(_io_buffer.local_addr<char>(),
Genode::min(_io_buffer.size(), dst_len));
/*
* If read buffer was in use, look if more data is buffered in