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// license:BSD-3-Clause
// copyright-holders:F.Ulivi
/***************************************************************************
dipty.h
Device PTY interface
***************************************************************************/
#include "emu.h"
#include "osdcore.h"
device_pty_interface::device_pty_interface(const machine_config &mconfig, device_t &device)
: device_interface(device, "pty"),
m_pty_master(NULL),
m_slave_name(),
m_opened(false)
{
}
device_pty_interface::~device_pty_interface()
{
}
bool device_pty_interface::open(void)
{
if (!m_opened) {
char buffer[ 128 ];
if (osd_openpty(&m_pty_master , buffer , sizeof(buffer)) == FILERR_NONE) {
m_opened = true;
m_slave_name.assign(buffer);
} else {
m_opened = false;
m_pty_master = NULL;
}
}
return m_opened;
}
void device_pty_interface::close(void)
{
if (m_opened) {
osd_close(m_pty_master);
m_opened = false;
}
}
ssize_t device_pty_interface::read(UINT8 *rx_chars , size_t count)
{
UINT32 actual_bytes;
if (m_opened && osd_read(m_pty_master, rx_chars, 0, count, &actual_bytes) == FILERR_NONE) {
return actual_bytes;
} else {
return -1;
}
}
void device_pty_interface::write(UINT8 tx_char)
{
UINT32 actual_bytes;
if (m_opened) {
osd_write(m_pty_master, &tx_char, 0, 1, &actual_bytes);
}
}
bool device_pty_interface::is_slave_connected(void) const
{
// TODO: really check for slave status
return m_opened;
}
const char *device_pty_interface::slave_name(void) const
{
return m_slave_name.c_str();
}
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