/*
* @brief convert String to integer
*
* @param value A pointer to string
* @return integer
*/
static t_u32
a2hex_or_atoi(t_s8 * value)
{
if (value[0] == '0' && (value[1] == 'X' || value[1] == 'x')) {
return a2hex(value + 2);
} else if (isdigit(*value)) {
return atoi(value);
} else {
return *value;
}
}
char remote488_device::recv_update(uint8_t& data)
{
char c;
unsigned i;
// Do not iterate too much..
for (i = 0; i < 8 && m_stream->input(&c , 1); i++) {
int prev_state = m_rx_state;
switch (m_rx_state) {
case REM_RX_WAIT_CH:
if (is_msg_type(c)) {
m_rx_ch = c;
m_rx_state = REM_RX_WAIT_COLON;
} else if (!is_space(c)) {
m_rx_state = REM_RX_WAIT_WS;
}
break;
case REM_RX_WAIT_COLON:
if (c == ':') {
m_rx_state = REM_RX_WAIT_1ST_HEX;
} else {
m_rx_state = REM_RX_WAIT_WS;
}
break;
case REM_RX_WAIT_1ST_HEX:
if (a2hex(c , m_rx_data)) {
m_rx_state = REM_RX_WAIT_2ND_HEX;
} else {
m_rx_state = REM_RX_WAIT_WS;
}
break;
case REM_RX_WAIT_2ND_HEX:
{
uint8_t tmp;
if (a2hex(c , tmp)) {
m_rx_data = (m_rx_data << 4) | tmp;
m_rx_state = REM_RX_WAIT_SEP;
} else {
m_rx_state = REM_RX_WAIT_WS;
}
}
break;
case REM_RX_WAIT_SEP:
if (is_terminator(c) || is_space(c)) {
m_rx_state = REM_RX_WAIT_CH;
LOG_PARSER("PARSE %02x %d->%d\n" , c , prev_state , m_rx_state);
data = m_rx_data;
return m_rx_ch;
} else {
m_rx_state = REM_RX_WAIT_WS;
}
break;
case REM_RX_WAIT_WS:
if (is_terminator(c) || is_space(c)) {
m_rx_state = REM_RX_WAIT_CH;
}
break;
default:
m_rx_state = REM_RX_WAIT_CH;
break;
}
LOG_PARSER("PARSE %02x %d->%d\n" , c , prev_state , m_rx_state);
}
return 0;
}