ssize_t
serialGetData (
SerialDevice *serial,
void *buffer, size_t size,
int initialTimeout, int subsequentTimeout
) {
unsigned char *byte = buffer;
const unsigned char *const first = byte;
const unsigned char *const end = first + size;
int timeout = initialTimeout;
while (byte < end) {
if (!serialPollInput(serial, timeout)) break;
*byte++ = serial->package.byte;
serial->package.byte = SERIAL_NO_BYTE;
timeout = subsequentTimeout;
}
{
size_t count = byte - first;
if (count) return count;
}
errno = EAGAIN;
return -1;
}
ssize_t
serialGetData (
SerialDevice *serial,
void *buffer, size_t size,
int initialTimeout, int subsequentTimeout
) {
unsigned char *const start = buffer;
unsigned char *const end = start + size;
unsigned char *byte = start;
int timeout = initialTimeout;
while (byte < end) {
if (!serialPollInput(serial, timeout)) break;
timeout = subsequentTimeout;
{
int status = serialBiosCommand(serial, _COM_RECEIVE, 0);
*byte++ = status & 0XFF;
}
}
return byte - start;
}
int
serialAwaitInput (SerialDevice *serial, int timeout) {
if (!serialFlushAttributes(serial)) return 0;
if (!serialPollInput(serial, timeout)) return 0;
return 1;
}
