+#define CHECK_PORT_HANDLE() do { \
+ if (port->hdl == INVALID_HANDLE_VALUE) \
+ RETURN_ERROR(SP_ERR_ARG, "Port not open"); \
+} while (0)
+#else
+#define CHECK_PORT_HANDLE() do { \
+ if (port->fd < 0) \
+ RETURN_ERROR(SP_ERR_ARG, "Port not open"); \
+} while (0)
+#endif
+#define CHECK_OPEN_PORT() do { \
+ CHECK_PORT(); \
+ CHECK_PORT_HANDLE(); \
+} while (0)
+
+#ifdef WIN32
+/** To be called after port receive buffer is emptied. */
+static enum sp_return restart_wait(struct sp_port *port)
+{
+ DWORD wait_result;
+
+ if (port->wait_running) {
+ /* Check status of running wait operation. */
+ if (GetOverlappedResult(port->hdl, &port->wait_ovl,
+ &wait_result, FALSE)) {
+ DEBUG("Previous wait completed");
+ port->wait_running = FALSE;
+ } else if (GetLastError() == ERROR_IO_INCOMPLETE) {
+ DEBUG("Previous wait still running");
+ RETURN_OK();
+ } else {
+ RETURN_FAIL("GetOverlappedResult() failed");
+ }
+ }
+
+ if (!port->wait_running) {
+ /* Start new wait operation. */
+ if (WaitCommEvent(port->hdl, &port->events,
+ &port->wait_ovl)) {
+ DEBUG("New wait returned, events already pending");
+ } else if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("New wait running in background");
+ port->wait_running = TRUE;
+ } else {
+ RETURN_FAIL("WaitCommEvent() failed");
+ }
+ }
+
+ RETURN_OK();
+}
+#endif
+
+SP_API enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
+{
+ struct port_data data;
+ struct sp_port_config config;
+ enum sp_return ret;
+
+ TRACE("%p, 0x%x", port, flags);
+
+ CHECK_PORT();
+
+ if (flags > SP_MODE_READ_WRITE)
+ RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
+
+ DEBUG_FMT("Opening port %s", port->name);
+
+#ifdef _WIN32
+ DWORD desired_access = 0, flags_and_attributes = 0, errors;
+ char *escaped_port_name;
+ COMSTAT status;
+
+ /* Prefix port name with '\\.\' to work with ports above COM9. */
+ if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
+ RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
+ sprintf(escaped_port_name, "\\\\.\\%s", port->name);
+
+ /* Map 'flags' to the OS-specific settings. */
+ flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
+ if (flags & SP_MODE_READ)
+ desired_access |= GENERIC_READ;
+ if (flags & SP_MODE_WRITE)
+ desired_access |= GENERIC_WRITE;
+
+ port->hdl = CreateFileA(escaped_port_name, desired_access, 0, 0,
+ OPEN_EXISTING, flags_and_attributes, 0);
+
+ free(escaped_port_name);
+
+ if (port->hdl == INVALID_HANDLE_VALUE)
+ RETURN_FAIL("Port CreateFile() failed");
+
+ /* All timeouts initially disabled. */
+ port->timeouts.ReadIntervalTimeout = 0;
+ port->timeouts.ReadTotalTimeoutMultiplier = 0;
+ port->timeouts.ReadTotalTimeoutConstant = 0;
+ port->timeouts.WriteTotalTimeoutMultiplier = 0;
+ port->timeouts.WriteTotalTimeoutConstant = 0;
+
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
+ sp_close(port);
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Prepare OVERLAPPED structures. */
+#define INIT_OVERLAPPED(ovl) do { \
+ memset(&port->ovl, 0, sizeof(port->ovl)); \
+ port->ovl.hEvent = INVALID_HANDLE_VALUE; \
+ if ((port->ovl.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL)) \
+ == INVALID_HANDLE_VALUE) { \
+ sp_close(port); \
+ RETURN_FAIL(#ovl "CreateEvent() failed"); \
+ } \
+} while (0)
+
+ INIT_OVERLAPPED(read_ovl);
+ INIT_OVERLAPPED(write_ovl);
+ INIT_OVERLAPPED(wait_ovl);
+
+ /* Set event mask for RX and error events. */
+ if (SetCommMask(port->hdl, EV_RXCHAR | EV_ERR) == 0) {
+ sp_close(port);
+ RETURN_FAIL("SetCommMask() failed");
+ }
+
+ port->writing = FALSE;
+ port->wait_running = FALSE;
+
+ ret = restart_wait(port);
+
+ if (ret < 0) {
+ sp_close(port);
+ RETURN_CODEVAL(ret);
+ }
+#else
+ int flags_local = O_NONBLOCK | O_NOCTTY | O_CLOEXEC;
+
+ /* Map 'flags' to the OS-specific settings. */
+ if ((flags & SP_MODE_READ_WRITE) == SP_MODE_READ_WRITE)
+ flags_local |= O_RDWR;
+ else if (flags & SP_MODE_READ)
+ flags_local |= O_RDONLY;
+ else if (flags & SP_MODE_WRITE)
+ flags_local |= O_WRONLY;
+
+ if ((port->fd = open(port->name, flags_local)) < 0)
+ RETURN_FAIL("open() failed");
+
+ /*
+ * On POSIX in the default case the file descriptor of a serial port
+ * is not opened exclusively. Therefore the settings of a port are
+ * overwritten if the serial port is opened a second time. Windows
+ * opens all serial ports exclusively.
+ * So the idea is to open the serial ports alike in the exclusive mode.
+ *
+ * ioctl(*, TIOCEXCL) defines the file descriptor as exclusive. So all
+ * further open calls on the serial port will fail.
+ *
+ * There is a race condition if two processes open the same serial
+ * port. None of the processes will notice the exclusive ownership of
+ * the other process because ioctl() doesn't return an error code if
+ * the file descriptor is already marked as exclusive.
+ * This can be solved with flock(). It returns an error if the file
+ * descriptor is already locked by another process.
+ */
+#ifdef HAVE_FLOCK
+ if (flock(port->fd, LOCK_EX | LOCK_NB) < 0)
+ RETURN_FAIL("flock() failed");
+#endif
+
+#ifdef TIOCEXCL
+ /*
+ * Before Linux 3.8 ioctl(*, TIOCEXCL) was not implemented and could
+ * lead to EINVAL or ENOTTY.
+ * These errors aren't fatal and can be ignored.
+ */
+ if (ioctl(port->fd, TIOCEXCL) < 0 && errno != EINVAL && errno != ENOTTY)
+ RETURN_FAIL("ioctl() failed");
+#endif
+
+#endif
+
+ ret = get_config(port, &data, &config);
+
+ if (ret < 0) {
+ sp_close(port);
+ RETURN_CODEVAL(ret);
+ }
+
+ /* Set sane port settings. */
+#ifdef _WIN32
+ data.dcb.fBinary = TRUE;
+ data.dcb.fDsrSensitivity = FALSE;
+ data.dcb.fErrorChar = FALSE;
+ data.dcb.fNull = FALSE;
+ data.dcb.fAbortOnError = FALSE;
+#else
+ /* Turn off all fancy termios tricks, give us a raw channel. */
+ data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
+#ifdef IUCLC
+ data.term.c_iflag &= ~IUCLC;
+#endif
+ data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
+#ifdef OLCUC
+ data.term.c_oflag &= ~OLCUC;
+#endif
+#ifdef NLDLY
+ data.term.c_oflag &= ~NLDLY;
+#endif
+#ifdef CRDLY
+ data.term.c_oflag &= ~CRDLY;
+#endif
+#ifdef TABDLY
+ data.term.c_oflag &= ~TABDLY;
+#endif
+#ifdef BSDLY
+ data.term.c_oflag &= ~BSDLY;
+#endif
+#ifdef VTDLY
+ data.term.c_oflag &= ~VTDLY;
+#endif
+#ifdef FFDLY
+ data.term.c_oflag &= ~FFDLY;
+#endif
+#ifdef OFILL
+ data.term.c_oflag &= ~OFILL;
+#endif
+ data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
+ data.term.c_cc[VMIN] = 0;
+ data.term.c_cc[VTIME] = 0;
+
+ /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
+ data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
+#endif
+
+#ifdef _WIN32
+ if (ClearCommError(port->hdl, &errors, &status) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+#endif
+
+ ret = set_config(port, &data, &config);
+
+ if (ret < 0) {
+ sp_close(port);
+ RETURN_CODEVAL(ret);
+ }
+
+ RETURN_OK();
+}
+
+SP_API enum sp_return sp_close(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG_FMT("Closing port %s", port->name);
+
+#ifdef _WIN32
+ /* Returns non-zero upon success, 0 upon failure. */
+ if (CloseHandle(port->hdl) == 0)
+ RETURN_FAIL("Port CloseHandle() failed");
+ port->hdl = INVALID_HANDLE_VALUE;
+
+ /* Close event handles for overlapped structures. */
+#define CLOSE_OVERLAPPED(ovl) do { \
+ if (port->ovl.hEvent != INVALID_HANDLE_VALUE && \
+ CloseHandle(port->ovl.hEvent) == 0) \
+ RETURN_FAIL(# ovl "event CloseHandle() failed"); \
+} while (0)
+ CLOSE_OVERLAPPED(read_ovl);
+ CLOSE_OVERLAPPED(write_ovl);
+ CLOSE_OVERLAPPED(wait_ovl);
+
+ if (port->write_buf) {
+ free(port->write_buf);
+ port->write_buf = NULL;
+ }
+#else
+ /* Returns 0 upon success, -1 upon failure. */
+ if (close(port->fd) == -1)
+ RETURN_FAIL("close() failed");
+ port->fd = -1;
+#endif
+
+ RETURN_OK();
+}
+
+SP_API enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
+{
+ TRACE("%p, 0x%x", port, buffers);
+
+ CHECK_OPEN_PORT();
+
+ if (buffers > SP_BUF_BOTH)
+ RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
+
+ const char *buffer_names[] = {"no", "input", "output", "both"};
+
+ DEBUG_FMT("Flushing %s buffers on port %s",
+ buffer_names[buffers], port->name);
+
+#ifdef _WIN32
+ DWORD flags = 0;
+ if (buffers & SP_BUF_INPUT)
+ flags |= PURGE_RXCLEAR;
+ if (buffers & SP_BUF_OUTPUT)
+ flags |= PURGE_TXCLEAR;
+
+ /* Returns non-zero upon success, 0 upon failure. */
+ if (PurgeComm(port->hdl, flags) == 0)
+ RETURN_FAIL("PurgeComm() failed");
+
+ if (buffers & SP_BUF_INPUT)
+ TRY(restart_wait(port));
+#else
+ int flags = 0;
+ if (buffers == SP_BUF_BOTH)
+ flags = TCIOFLUSH;
+ else if (buffers == SP_BUF_INPUT)
+ flags = TCIFLUSH;
+ else if (buffers == SP_BUF_OUTPUT)
+ flags = TCOFLUSH;
+
+ /* Returns 0 upon success, -1 upon failure. */
+ if (tcflush(port->fd, flags) < 0)
+ RETURN_FAIL("tcflush() failed");
+#endif
+ RETURN_OK();
+}
+
+SP_API enum sp_return sp_drain(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG_FMT("Draining port %s", port->name);
+
+#ifdef _WIN32
+ /* Returns non-zero upon success, 0 upon failure. */
+ if (FlushFileBuffers(port->hdl) == 0)
+ RETURN_FAIL("FlushFileBuffers() failed");
+ RETURN_OK();
+#else
+ int result;
+ while (1) {
+#if defined(__ANDROID__) && (__ANDROID_API__ < 21)
+ /* Android only has tcdrain from platform 21 onwards.
+ * On previous API versions, use the ioctl directly. */
+ int arg = 1;
+ result = ioctl(port->fd, TCSBRK, &arg);
+#else
+ result = tcdrain(port->fd);
+#endif
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("tcdrain() was interrupted");
+ continue;
+ } else {
+ RETURN_FAIL("tcdrain() failed");
+ }
+ } else {
+ RETURN_OK();
+ }
+ }
+#endif
+}
+
+#ifdef _WIN32
+static enum sp_return await_write_completion(struct sp_port *port)
+{
+ TRACE("%p", port);
+ DWORD bytes_written;
+ BOOL result;
+
+ /* Wait for previous non-blocking write to complete, if any. */
+ if (port->writing) {
+ DEBUG("Waiting for previous write to complete");
+ result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
+ port->writing = 0;
+ if (!result)
+ RETURN_FAIL("Previous write failed to complete");
+ DEBUG("Previous write completed");
+ }
+
+ RETURN_OK();
+}
+#endif
+
+SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
+ size_t count, unsigned int timeout_ms)
+{
+ TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ if (timeout_ms)
+ DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms",
+ count, port->name, timeout_ms);
+ else
+ DEBUG_FMT("Writing %d bytes to port %s, no timeout",
+ count, port->name);
+
+ if (count == 0)
+ RETURN_INT(0);
+
+#ifdef _WIN32
+ DWORD remaining_ms, write_size, bytes_written;
+ size_t remaining_bytes, total_bytes_written = 0;
+ const uint8_t *write_ptr = (uint8_t *) buf;
+ bool result;
+ struct timeout timeout;
+
+ timeout_start(&timeout, timeout_ms);
+
+ TRY(await_write_completion(port));
+
+ while (total_bytes_written < count) {
+
+ if (timeout_check(&timeout))
+ break;
+
+ remaining_ms = timeout_remaining_ms(&timeout);
+
+ if (port->timeouts.WriteTotalTimeoutConstant != remaining_ms) {
+ port->timeouts.WriteTotalTimeoutConstant = remaining_ms;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Reduce write size if it exceeds the WriteFile limit. */
+ remaining_bytes = count - total_bytes_written;
+ if (remaining_bytes > WRITEFILE_MAX_SIZE)
+ write_size = WRITEFILE_MAX_SIZE;
+ else
+ write_size = (DWORD) remaining_bytes;
+
+ /* Start write. */
+
+ result = WriteFile(port->hdl, write_ptr, write_size, NULL, &port->write_ovl);
+
+ timeout_update(&timeout);
+
+ if (result) {
+ DEBUG("Write completed immediately");
+ bytes_written = write_size;
+ } else if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("Waiting for write to complete");
+ if (GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE) == 0) {
+ if (GetLastError() == ERROR_SEM_TIMEOUT) {
+ DEBUG("Write timed out");
+ break;
+ } else {
+ RETURN_FAIL("GetOverlappedResult() failed");
+ }
+ }
+ DEBUG_FMT("Write completed, %d/%d bytes written", bytes_written, write_size);
+ } else {
+ RETURN_FAIL("WriteFile() failed");
+ }
+
+ write_ptr += bytes_written;
+ total_bytes_written += bytes_written;
+ }
+
+ RETURN_INT((int) total_bytes_written);
+#else
+ size_t bytes_written = 0;
+ unsigned char *ptr = (unsigned char *) buf;
+ struct timeout timeout;
+ fd_set fds;
+ int result;
+
+ timeout_start(&timeout, timeout_ms);
+
+ FD_ZERO(&fds);
+ FD_SET(port->fd, &fds);
+
+ /* Loop until we have written the requested number of bytes. */
+ while (bytes_written < count) {
+
+ if (timeout_check(&timeout))
+ break;
+
+ result = select(port->fd + 1, NULL, &fds, NULL, timeout_timeval(&timeout));
+
+ timeout_update(&timeout);
+
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("select() call was interrupted, repeating");
+ continue;
+ } else {
+ RETURN_FAIL("select() failed");
+ }
+ } else if (result == 0) {
+ /* Timeout has expired. */
+ break;
+ }
+
+ /* Do write. */
+ result = write(port->fd, ptr, count - bytes_written);
+
+ if (result < 0) {
+ if (errno == EAGAIN)
+ /* This shouldn't happen because we did a select() first, but handle anyway. */
+ continue;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("write() failed");
+ }
+
+ bytes_written += result;
+ ptr += result;
+ }
+
+ if (bytes_written < count)
+ DEBUG("Write timed out");
+
+ RETURN_INT(bytes_written);
+#endif
+}
+
+SP_API enum sp_return sp_nonblocking_write(struct sp_port *port,
+ const void *buf, size_t count)
+{
+ TRACE("%p, %p, %d", port, buf, count);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ DEBUG_FMT("Writing up to %d bytes to port %s", count, port->name);
+
+ if (count == 0)
+ RETURN_INT(0);
+
+#ifdef _WIN32
+ size_t buf_bytes;
+
+ /* Check whether previous write is complete. */
+ if (port->writing) {
+ if (HasOverlappedIoCompleted(&port->write_ovl)) {
+ DEBUG("Previous write completed");
+ port->writing = 0;
+ } else {
+ DEBUG("Previous write not complete");
+ /* Can't take a new write until the previous one finishes. */
+ RETURN_INT(0);
+ }
+ }
+
+ /* Set timeout. */
+ if (port->timeouts.WriteTotalTimeoutConstant != 0) {
+ port->timeouts.WriteTotalTimeoutConstant = 0;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Reduce count if it exceeds the WriteFile limit. */
+ if (count > WRITEFILE_MAX_SIZE)
+ count = WRITEFILE_MAX_SIZE;
+
+ /* Copy data to our write buffer. */
+ buf_bytes = min(port->write_buf_size, count);
+ memcpy(port->write_buf, buf, buf_bytes);
+
+ /* Start asynchronous write. */
+ if (WriteFile(port->hdl, port->write_buf, (DWORD) buf_bytes, NULL, &port->write_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ if ((port->writing = !HasOverlappedIoCompleted(&port->write_ovl)))
+ DEBUG("Asynchronous write completed immediately");
+ else
+ DEBUG("Asynchronous write running");
+ } else {
+ /* Actual failure of some kind. */
+ RETURN_FAIL("WriteFile() failed");
+ }
+ }
+
+ DEBUG("All bytes written immediately");
+
+ RETURN_INT((int) buf_bytes);
+#else
+ /* Returns the number of bytes written, or -1 upon failure. */
+ ssize_t written = write(port->fd, buf, count);
+
+ if (written < 0) {
+ if (errno == EAGAIN)
+ // Buffer is full, no bytes written.
+ RETURN_INT(0);
+ else
+ RETURN_FAIL("write() failed");
+ } else {
+ RETURN_INT(written);
+ }
+#endif
+}
+
+#ifdef _WIN32
+/* Restart wait operation if buffer was emptied. */
+static enum sp_return restart_wait_if_needed(struct sp_port *port, unsigned int bytes_read)
+{
+ DWORD errors;
+ COMSTAT comstat;
+
+ if (bytes_read == 0)
+ RETURN_OK();
+
+ if (ClearCommError(port->hdl, &errors, &comstat) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+
+ if (comstat.cbInQue == 0)
+ TRY(restart_wait(port));
+
+ RETURN_OK();
+}
+#endif
+
+SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
+ size_t count, unsigned int timeout_ms)
+{
+ TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ if (timeout_ms)
+ DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms",
+ count, port->name, timeout_ms);
+ else
+ DEBUG_FMT("Reading %d bytes from port %s, no timeout",
+ count, port->name);
+
+ if (count == 0)
+ RETURN_INT(0);
+
+#ifdef _WIN32
+ DWORD bytes_read;
+
+ /* Set timeout. */
+ if (port->timeouts.ReadIntervalTimeout != 0 ||
+ port->timeouts.ReadTotalTimeoutMultiplier != 0 ||
+ port->timeouts.ReadTotalTimeoutConstant != timeout_ms) {
+ port->timeouts.ReadIntervalTimeout = 0;
+ port->timeouts.ReadTotalTimeoutMultiplier = 0;
+ port->timeouts.ReadTotalTimeoutConstant = timeout_ms;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Start read. */
+ if (ReadFile(port->hdl, buf, (DWORD) count, NULL, &port->read_ovl)) {
+ DEBUG("Read completed immediately");
+ bytes_read = (DWORD) count;
+ } else if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("Waiting for read to complete");
+ if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
+ RETURN_FAIL("GetOverlappedResult() failed");
+ DEBUG_FMT("Read completed, %d/%d bytes read", bytes_read, count);
+ } else {
+ RETURN_FAIL("ReadFile() failed");
+ }
+
+ TRY(restart_wait_if_needed(port, bytes_read));
+
+ RETURN_INT((int) bytes_read);
+
+#else
+ size_t bytes_read = 0;
+ unsigned char *ptr = (unsigned char *) buf;
+ struct timeout timeout;
+ fd_set fds;
+ int result;
+
+ timeout_start(&timeout, timeout_ms);
+
+ FD_ZERO(&fds);
+ FD_SET(port->fd, &fds);
+
+ /* Loop until we have the requested number of bytes. */
+ while (bytes_read < count) {
+
+ if (timeout_check(&timeout))
+ /* Timeout has expired. */
+ break;
+
+ result = select(port->fd + 1, &fds, NULL, NULL, timeout_timeval(&timeout));
+
+ timeout_update(&timeout);
+
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("select() call was interrupted, repeating");
+ continue;
+ } else {
+ RETURN_FAIL("select() failed");
+ }
+ } else if (result == 0) {
+ /* Timeout has expired. */
+ break;
+ }
+
+ /* Do read. */
+ result = read(port->fd, ptr, count - bytes_read);
+
+ if (result < 0) {
+ if (errno == EAGAIN)
+ /*
+ * This shouldn't happen because we did a
+ * select() first, but handle anyway.
+ */
+ continue;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("read() failed");
+ }
+
+ bytes_read += result;
+ ptr += result;
+ }
+
+ if (bytes_read < count)
+ DEBUG("Read timed out");
+
+ RETURN_INT(bytes_read);
+#endif
+}
+
+SP_API enum sp_return sp_blocking_read_next(struct sp_port *port, void *buf,
+ size_t count, unsigned int timeout_ms)
+{
+ TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ if (count == 0)
+ RETURN_ERROR(SP_ERR_ARG, "Zero count");
+
+ if (timeout_ms)
+ DEBUG_FMT("Reading next max %d bytes from port %s, timeout %d ms",
+ count, port->name, timeout_ms);
+ else
+ DEBUG_FMT("Reading next max %d bytes from port %s, no timeout",
+ count, port->name);
+
+#ifdef _WIN32
+ DWORD bytes_read = 0;
+
+ /* If timeout_ms == 0, set maximum timeout. */
+ DWORD timeout_val = (timeout_ms == 0 ? MAXDWORD - 1 : timeout_ms);
+
+ /* Set timeout. */
+ if (port->timeouts.ReadIntervalTimeout != MAXDWORD ||
+ port->timeouts.ReadTotalTimeoutMultiplier != MAXDWORD ||
+ port->timeouts.ReadTotalTimeoutConstant != timeout_val) {
+ port->timeouts.ReadIntervalTimeout = MAXDWORD;
+ port->timeouts.ReadTotalTimeoutMultiplier = MAXDWORD;
+ port->timeouts.ReadTotalTimeoutConstant = timeout_val;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Loop until we have at least one byte, or timeout is reached. */
+ while (bytes_read == 0) {
+ /* Start read. */
+ if (ReadFile(port->hdl, buf, (DWORD) count, &bytes_read, &port->read_ovl)) {
+ DEBUG("Read completed immediately");
+ } else if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("Waiting for read to complete");
+ if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
+ RETURN_FAIL("GetOverlappedResult() failed");
+ if (bytes_read > 0) {
+ DEBUG("Read completed");
+ } else if (timeout_ms > 0) {
+ DEBUG("Read timed out");
+ break;
+ } else {
+ DEBUG("Restarting read");
+ }
+ } else {
+ RETURN_FAIL("ReadFile() failed");
+ }
+ }
+
+ TRY(restart_wait_if_needed(port, bytes_read));
+
+ RETURN_INT(bytes_read);
+
+#else
+ size_t bytes_read = 0;
+ struct timeout timeout;
+ fd_set fds;
+ int result;
+
+ timeout_start(&timeout, timeout_ms);
+
+ FD_ZERO(&fds);
+ FD_SET(port->fd, &fds);
+
+ /* Loop until we have at least one byte, or timeout is reached. */
+ while (bytes_read == 0) {
+
+ if (timeout_check(&timeout))
+ /* Timeout has expired. */
+ break;
+
+ result = select(port->fd + 1, &fds, NULL, NULL, timeout_timeval(&timeout));
+
+ timeout_update(&timeout);
+
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("select() call was interrupted, repeating");
+ continue;
+ } else {
+ RETURN_FAIL("select() failed");
+ }
+ } else if (result == 0) {
+ /* Timeout has expired. */
+ break;
+ }
+
+ /* Do read. */
+ result = read(port->fd, buf, count);
+
+ if (result < 0) {
+ if (errno == EAGAIN)
+ /* This shouldn't happen because we did a select() first, but handle anyway. */
+ continue;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("read() failed");
+ }
+
+ bytes_read = result;
+ }
+
+ if (bytes_read == 0)
+ DEBUG("Read timed out");
+
+ RETURN_INT(bytes_read);
+#endif
+}
+
+SP_API enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf,
+ size_t count)
+{
+ TRACE("%p, %p, %d", port, buf, count);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ DEBUG_FMT("Reading up to %d bytes from port %s", count, port->name);
+
+#ifdef _WIN32
+ DWORD bytes_read;
+
+ /* Set timeout. */
+ if (port->timeouts.ReadIntervalTimeout != MAXDWORD ||
+ port->timeouts.ReadTotalTimeoutMultiplier != 0 ||
+ port->timeouts.ReadTotalTimeoutConstant != 0) {
+ port->timeouts.ReadIntervalTimeout = MAXDWORD;
+ port->timeouts.ReadTotalTimeoutMultiplier = 0;
+ port->timeouts.ReadTotalTimeoutConstant = 0;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Do read. */
+ if (ReadFile(port->hdl, buf, (DWORD) count, NULL, &port->read_ovl) == 0)
+ if (GetLastError() != ERROR_IO_PENDING)
+ RETURN_FAIL("ReadFile() failed");
+
+ /* Get number of bytes read. */
+ if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, FALSE) == 0)
+ RETURN_FAIL("GetOverlappedResult() failed");
+
+ TRY(restart_wait_if_needed(port, bytes_read));
+
+ RETURN_INT(bytes_read);
+#else
+ ssize_t bytes_read;
+
+ /* Returns the number of bytes read, or -1 upon failure. */
+ if ((bytes_read = read(port->fd, buf, count)) < 0) {
+ if (errno == EAGAIN)
+ /* No bytes available. */
+ bytes_read = 0;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("read() failed");
+ }
+ RETURN_INT(bytes_read);
+#endif
+}
+
+SP_API enum sp_return sp_input_waiting(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG_FMT("Checking input bytes waiting on port %s", port->name);
+
+#ifdef _WIN32
+ DWORD errors;
+ COMSTAT comstat;
+
+ if (ClearCommError(port->hdl, &errors, &comstat) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+ RETURN_INT(comstat.cbInQue);
+#else
+ int bytes_waiting;
+ if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
+ RETURN_FAIL("TIOCINQ ioctl failed");
+ RETURN_INT(bytes_waiting);
+#endif
+}
+
+SP_API enum sp_return sp_output_waiting(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+#ifdef __CYGWIN__
+ /* TIOCOUTQ is not defined in Cygwin headers */
+ RETURN_ERROR(SP_ERR_SUPP,
+ "Getting output bytes waiting is not supported on Cygwin");
+#else
+ CHECK_OPEN_PORT();
+
+ DEBUG_FMT("Checking output bytes waiting on port %s", port->name);
+
+#ifdef _WIN32
+ DWORD errors;
+ COMSTAT comstat;
+
+ if (ClearCommError(port->hdl, &errors, &comstat) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+ RETURN_INT(comstat.cbOutQue);
+#else
+ int bytes_waiting;
+ if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
+ RETURN_FAIL("TIOCOUTQ ioctl failed");
+ RETURN_INT(bytes_waiting);
+#endif
+#endif
+}
+
+SP_API enum sp_return sp_new_event_set(struct sp_event_set **result_ptr)
+{
+ struct sp_event_set *result;
+
+ TRACE("%p", result_ptr);
+
+ if (!result_ptr)
+ RETURN_ERROR(SP_ERR_ARG, "Null result");
+
+ *result_ptr = NULL;
+
+ if (!(result = malloc(sizeof(struct sp_event_set))))
+ RETURN_ERROR(SP_ERR_MEM, "sp_event_set malloc() failed");
+
+ memset(result, 0, sizeof(struct sp_event_set));
+
+ *result_ptr = result;
+
+ RETURN_OK();
+}
+
+static enum sp_return add_handle(struct sp_event_set *event_set,
+ event_handle handle, enum sp_event mask)
+{
+ void *new_handles;
+ enum sp_event *new_masks;
+
+ TRACE("%p, %d, %d", event_set, handle, mask);
+
+ if (!(new_handles = realloc(event_set->handles,
+ sizeof(event_handle) * (event_set->count + 1))))
+ RETURN_ERROR(SP_ERR_MEM, "Handle array realloc() failed");
+
+ event_set->handles = new_handles;
+
+ if (!(new_masks = realloc(event_set->masks,
+ sizeof(enum sp_event) * (event_set->count + 1))))
+ RETURN_ERROR(SP_ERR_MEM, "Mask array realloc() failed");
+
+ event_set->masks = new_masks;
+
+ ((event_handle *) event_set->handles)[event_set->count] = handle;
+ event_set->masks[event_set->count] = mask;
+
+ event_set->count++;
+
+ RETURN_OK();
+}
+
+SP_API enum sp_return sp_add_port_events(struct sp_event_set *event_set,
+ const struct sp_port *port, enum sp_event mask)
+{
+ TRACE("%p, %p, %d", event_set, port, mask);
+
+ if (!event_set)
+ RETURN_ERROR(SP_ERR_ARG, "Null event set");
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+
+ if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR))
+ RETURN_ERROR(SP_ERR_ARG, "Invalid event mask");
+
+ if (!mask)
+ RETURN_OK();
+
+#ifdef _WIN32
+ enum sp_event handle_mask;
+ if ((handle_mask = mask & SP_EVENT_TX_READY))
+ TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask));
+ if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR)))
+ TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask));
+#else
+ TRY(add_handle(event_set, port->fd, mask));
+#endif
+
+ RETURN_OK();
+}
+
+SP_API void sp_free_event_set(struct sp_event_set *event_set)
+{
+ TRACE("%p", event_set);
+
+ if (!event_set) {
+ DEBUG("Null event set");
+ RETURN();
+ }
+
+ DEBUG("Freeing event set");
+
+ if (event_set->handles)
+ free(event_set->handles);
+ if (event_set->masks)
+ free(event_set->masks);
+
+ free(event_set);
+
+ RETURN();
+}
+
+SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
+ unsigned int timeout_ms)
+{
+ TRACE("%p, %d", event_set, timeout_ms);
+
+ if (!event_set)
+ RETURN_ERROR(SP_ERR_ARG, "Null event set");
+
+#ifdef _WIN32
+ if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
+ timeout_ms ? timeout_ms : INFINITE) == WAIT_FAILED)
+ RETURN_FAIL("WaitForMultipleObjects() failed");
+
+ RETURN_OK();
+#else
+ struct timeout timeout;
+ int poll_timeout;
+ int result;
+ struct pollfd *pollfds;
+ unsigned int i;
+
+ if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count)))
+ RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed");
+
+ for (i = 0; i < event_set->count; i++) {
+ pollfds[i].fd = ((int *)event_set->handles)[i];
+ pollfds[i].events = 0;
+ pollfds[i].revents = 0;
+ if (event_set->masks[i] & SP_EVENT_RX_READY)
+ pollfds[i].events |= POLLIN;
+ if (event_set->masks[i] & SP_EVENT_TX_READY)
+ pollfds[i].events |= POLLOUT;
+ if (event_set->masks[i] & SP_EVENT_ERROR)
+ pollfds[i].events |= POLLERR;
+ }
+
+ timeout_start(&timeout, timeout_ms);
+ timeout_limit(&timeout, INT_MAX);
+
+ /* Loop until an event occurs. */
+ while (1) {
+
+ if (timeout_check(&timeout)) {
+ DEBUG("Wait timed out");
+ break;
+ }
+
+ poll_timeout = (int) timeout_remaining_ms(&timeout);
+ if (poll_timeout == 0)
+ poll_timeout = -1;
+
+ result = poll(pollfds, event_set->count, poll_timeout);
+
+ timeout_update(&timeout);
+
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("poll() call was interrupted, repeating");
+ continue;
+ } else {
+ free(pollfds);
+ RETURN_FAIL("poll() failed");
+ }
+ } else if (result == 0) {
+ DEBUG("poll() timed out");
+ if (!timeout.overflow)
+ break;
+ } else {
+ DEBUG("poll() completed");
+ break;
+ }
+ }
+
+ free(pollfds);
+ RETURN_OK();
+#endif
+}
+
+#ifdef USE_TERMIOS_SPEED
+static enum sp_return get_baudrate(int fd, int *baudrate)
+{
+ void *data;
+
+ TRACE("%d, %p", fd, baudrate);
+
+ DEBUG("Getting baud rate");
+
+ if (!(data = malloc(get_termios_size())))
+ RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
+
+ if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
+ free(data);
+ RETURN_FAIL("Getting termios failed");
+ }
+
+ *baudrate = get_termios_speed(data);
+
+ free(data);
+
+ RETURN_OK();
+}
+
+static enum sp_return set_baudrate(int fd, int baudrate)
+{
+ void *data;
+
+ TRACE("%d, %d", fd, baudrate);
+
+ DEBUG("Getting baud rate");
+
+ if (!(data = malloc(get_termios_size())))
+ RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
+
+ if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
+ free(data);
+ RETURN_FAIL("Getting termios failed");
+ }
+
+ DEBUG("Setting baud rate");
+
+ set_termios_speed(data, baudrate);
+
+ if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
+ free(data);
+ RETURN_FAIL("Setting termios failed");
+ }
+
+ free(data);
+
+ RETURN_OK();
+}
+#endif /* USE_TERMIOS_SPEED */
+
+#ifdef USE_TERMIOX
+static enum sp_return get_flow(int fd, struct port_data *data)
+{
+ void *termx;
+
+ TRACE("%d, %p", fd, data);
+
+ DEBUG("Getting advanced flow control");
+
+ if (!(termx = malloc(get_termiox_size())))
+ RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
+
+ if (ioctl(fd, TCGETX, termx) < 0) {
+ free(termx);
+ RETURN_FAIL("Getting termiox failed");
+ }
+
+ get_termiox_flow(termx, &data->rts_flow, &data->cts_flow,
+ &data->dtr_flow, &data->dsr_flow);
+
+ free(termx);
+
+ RETURN_OK();
+}
+
+static enum sp_return set_flow(int fd, struct port_data *data)
+{
+ void *termx;
+
+ TRACE("%d, %p", fd, data);
+
+ DEBUG("Getting advanced flow control");
+
+ if (!(termx = malloc(get_termiox_size())))
+ RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
+
+ if (ioctl(fd, TCGETX, termx) < 0) {
+ free(termx);
+ RETURN_FAIL("Getting termiox failed");
+ }
+
+ DEBUG("Setting advanced flow control");
+
+ set_termiox_flow(termx, data->rts_flow, data->cts_flow,
+ data->dtr_flow, data->dsr_flow);
+
+ if (ioctl(fd, TCSETX, termx) < 0) {
+ free(termx);
+ RETURN_FAIL("Setting termiox failed");
+ }
+
+ free(termx);
+
+ RETURN_OK();
+}
+#endif /* USE_TERMIOX */
+
+static enum sp_return get_config(struct sp_port *port, struct port_data *data,
+ struct sp_port_config *config)
+{
+ unsigned int i;
+
+ TRACE("%p, %p, %p", port, data, config);
+
+ DEBUG_FMT("Getting configuration for port %s", port->name);
+
+#ifdef _WIN32
+ if (!GetCommState(port->hdl, &data->dcb))
+ RETURN_FAIL("GetCommState() failed");
+
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (data->dcb.BaudRate == std_baudrates[i].index) {
+ config->baudrate = std_baudrates[i].value;
+ break;
+ }
+ }
+
+ if (i == NUM_STD_BAUDRATES)
+ /* BaudRate field can be either an index or a custom baud rate. */
+ config->baudrate = data->dcb.BaudRate;
+
+ config->bits = data->dcb.ByteSize;
+
+ switch (data->dcb.Parity) {
+ case NOPARITY:
+ config->parity = SP_PARITY_NONE;
+ break;
+ case ODDPARITY:
+ config->parity = SP_PARITY_ODD;
+ break;
+ case EVENPARITY:
+ config->parity = SP_PARITY_EVEN;
+ break;
+ case MARKPARITY:
+ config->parity = SP_PARITY_MARK;
+ break;
+ case SPACEPARITY:
+ config->parity = SP_PARITY_SPACE;
+ break;
+ default:
+ config->parity = -1;
+ }
+
+ switch (data->dcb.StopBits) {
+ case ONESTOPBIT:
+ config->stopbits = 1;
+ break;
+ case TWOSTOPBITS:
+ config->stopbits = 2;
+ break;
+ default:
+ config->stopbits = -1;
+ }
+
+ switch (data->dcb.fRtsControl) {
+ case RTS_CONTROL_DISABLE:
+ config->rts = SP_RTS_OFF;
+ break;
+ case RTS_CONTROL_ENABLE:
+ config->rts = SP_RTS_ON;
+ break;
+ case RTS_CONTROL_HANDSHAKE:
+ config->rts = SP_RTS_FLOW_CONTROL;
+ break;
+ default:
+ config->rts = -1;
+ }
+
+ config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
+
+ switch (data->dcb.fDtrControl) {
+ case DTR_CONTROL_DISABLE:
+ config->dtr = SP_DTR_OFF;
+ break;
+ case DTR_CONTROL_ENABLE:
+ config->dtr = SP_DTR_ON;
+ break;
+ case DTR_CONTROL_HANDSHAKE:
+ config->dtr = SP_DTR_FLOW_CONTROL;
+ break;
+ default:
+ config->dtr = -1;
+ }
+
+ config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
+
+ if (data->dcb.fInX) {
+ if (data->dcb.fOutX)
+ config->xon_xoff = SP_XONXOFF_INOUT;
+ else
+ config->xon_xoff = SP_XONXOFF_IN;
+ } else {
+ if (data->dcb.fOutX)
+ config->xon_xoff = SP_XONXOFF_OUT;
+ else
+ config->xon_xoff = SP_XONXOFF_DISABLED;
+ }
+
+#else // !_WIN32
+
+ if (tcgetattr(port->fd, &data->term) < 0)
+ RETURN_FAIL("tcgetattr() failed");
+
+ if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
+ RETURN_FAIL("TIOCMGET ioctl failed");
+
+#ifdef USE_TERMIOX
+ int ret = get_flow(port->fd, data);
+
+ if (ret == SP_ERR_FAIL && errno == EINVAL)
+ data->termiox_supported = 0;
+ else if (ret < 0)
+ RETURN_CODEVAL(ret);
+ else
+ data->termiox_supported = 1;
+#else
+ data->termiox_supported = 0;
+#endif
+
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (cfgetispeed(&data->term) == std_baudrates[i].index) {
+ config->baudrate = std_baudrates[i].value;
+ break;
+ }
+ }
+
+ if (i == NUM_STD_BAUDRATES) {
+#ifdef __APPLE__
+ config->baudrate = (int)data->term.c_ispeed;
+#elif defined(USE_TERMIOS_SPEED)
+ TRY(get_baudrate(port->fd, &config->baudrate));
+#else
+ config->baudrate = -1;
+#endif
+ }
+
+ switch (data->term.c_cflag & CSIZE) {
+ case CS8:
+ config->bits = 8;
+ break;
+ case CS7:
+ config->bits = 7;
+ break;
+ case CS6:
+ config->bits = 6;
+ break;
+ case CS5:
+ config->bits = 5;
+ break;
+ default:
+ config->bits = -1;
+ }
+
+ if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
+ config->parity = SP_PARITY_NONE;
+ else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
+ config->parity = -1;
+#ifdef CMSPAR
+ else if (data->term.c_cflag & CMSPAR)
+ config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
+#endif
+ else
+ config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
+
+ config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
+
+ if (data->term.c_cflag & CRTSCTS) {
+ config->rts = SP_RTS_FLOW_CONTROL;
+ config->cts = SP_CTS_FLOW_CONTROL;
+ } else {
+ if (data->termiox_supported && data->rts_flow)
+ config->rts = SP_RTS_FLOW_CONTROL;
+ else
+ config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
+
+ config->cts = (data->termiox_supported && data->cts_flow) ?
+ SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
+ }
+
+ if (data->termiox_supported && data->dtr_flow)
+ config->dtr = SP_DTR_FLOW_CONTROL;
+ else
+ config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
+
+ config->dsr = (data->termiox_supported && data->dsr_flow) ?
+ SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
+
+ if (data->term.c_iflag & IXOFF) {
+ if (data->term.c_iflag & IXON)
+ config->xon_xoff = SP_XONXOFF_INOUT;
+ else
+ config->xon_xoff = SP_XONXOFF_IN;
+ } else {
+ if (data->term.c_iflag & IXON)
+ config->xon_xoff = SP_XONXOFF_OUT;
+ else
+ config->xon_xoff = SP_XONXOFF_DISABLED;
+ }
+#endif
+
+ RETURN_OK();
+}
+
+static enum sp_return set_config(struct sp_port *port, struct port_data *data,
+ const struct sp_port_config *config)
+{
+ unsigned int i;
+#ifdef __APPLE__
+ BAUD_TYPE baud_nonstd;
+
+ baud_nonstd = B0;
+#endif
+#ifdef USE_TERMIOS_SPEED
+ int baud_nonstd = 0;
+#endif
+
+ TRACE("%p, %p, %p", port, data, config);
+
+ DEBUG_FMT("Setting configuration for port %s", port->name);
+
+#ifdef _WIN32
+ BYTE* new_buf;
+
+ TRY(await_write_completion(port));
+
+ if (config->baudrate >= 0) {
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (config->baudrate == std_baudrates[i].value) {
+ data->dcb.BaudRate = std_baudrates[i].index;
+ break;
+ }
+ }
+
+ if (i == NUM_STD_BAUDRATES)
+ data->dcb.BaudRate = config->baudrate;
+
+ /* Allocate write buffer for 50ms of data at baud rate. */
+ port->write_buf_size = max(config->baudrate / (8 * 20), 1);
+ new_buf = realloc(port->write_buf, port->write_buf_size);
+ if (!new_buf)
+ RETURN_ERROR(SP_ERR_MEM, "Allocating write buffer failed");
+ port->write_buf = new_buf;
+ }
+
+ if (config->bits >= 0)
+ data->dcb.ByteSize = config->bits;
+
+ if (config->parity >= 0) {
+ switch (config->parity) {
+ case SP_PARITY_NONE:
+ data->dcb.Parity = NOPARITY;
+ break;
+ case SP_PARITY_ODD:
+ data->dcb.Parity = ODDPARITY;
+ break;
+ case SP_PARITY_EVEN:
+ data->dcb.Parity = EVENPARITY;
+ break;
+ case SP_PARITY_MARK:
+ data->dcb.Parity = MARKPARITY;
+ break;
+ case SP_PARITY_SPACE:
+ data->dcb.Parity = SPACEPARITY;
+ break;
+ default:
+ RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
+ }
+ }
+
+ if (config->stopbits >= 0) {
+ switch (config->stopbits) {
+ /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
+ case 1:
+ data->dcb.StopBits = ONESTOPBIT;
+ break;
+ case 2:
+ data->dcb.StopBits = TWOSTOPBITS;
+ break;
+ default:
+ RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
+ }
+ }
+
+ if (config->rts >= 0) {
+ switch (config->rts) {
+ case SP_RTS_OFF:
+ data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
+ break;
+ case SP_RTS_ON:
+ data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
+ break;
+ case SP_RTS_FLOW_CONTROL:
+ data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
+ break;
+ default:
+ RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
+ }
+ }
+
+ if (config->cts >= 0) {
+ switch (config->cts) {
+ case SP_CTS_IGNORE:
+ data->dcb.fOutxCtsFlow = FALSE;
+ break;
+ case SP_CTS_FLOW_CONTROL:
+ data->dcb.fOutxCtsFlow = TRUE;
+ break;
+ default:
+ RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
+ }
+ }
+
+ if (config->dtr >= 0) {
+ switch (config->dtr) {
+ case SP_DTR_OFF:
+ data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
+ break;
+ case SP_DTR_ON:
+ data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
+ break;
+ case SP_DTR_FLOW_CONTROL:
+ data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
+ break;
+ default:
+ RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
+ }
+ }
+
+ if (config->dsr >= 0) {
+ switch (config->dsr) {
+ case SP_DSR_IGNORE:
+ data->dcb.fOutxDsrFlow = FALSE;
+ break;
+ case SP_DSR_FLOW_CONTROL:
+ data->dcb.fOutxDsrFlow = TRUE;
+ break;
+ default:
+ RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
+ }
+ }
+
+ if (config->xon_xoff >= 0) {
+ switch (config->xon_xoff) {
+ case SP_XONXOFF_DISABLED:
+ data->dcb.fInX = FALSE;
+ data->dcb.fOutX = FALSE;
+ break;
+ case SP_XONXOFF_IN:
+ data->dcb.fInX = TRUE;
+ data->dcb.fOutX = FALSE;
+ break;
+ case SP_XONXOFF_OUT:
+ data->dcb.fInX = FALSE;
+ data->dcb.fOutX = TRUE;
+ break;
+ case SP_XONXOFF_INOUT:
+ data->dcb.fInX = TRUE;
+ data->dcb.fOutX = TRUE;
+ break;
+ default:
+ RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
+ }
+ }
+
+ if (!SetCommState(port->hdl, &data->dcb))
+ RETURN_FAIL("SetCommState() failed");
+
+#else /* !_WIN32 */
+
+ int controlbits;
+
+ if (config->baudrate >= 0) {
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (config->baudrate == std_baudrates[i].value) {
+ if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
+ RETURN_FAIL("cfsetospeed() failed");
+
+ if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
+ RETURN_FAIL("cfsetispeed() failed");
+ break;
+ }
+ }
+
+ /* Non-standard baud rate */
+ if (i == NUM_STD_BAUDRATES) {
+#ifdef __APPLE__
+ /* Set "dummy" baud rate. */
+ if (cfsetspeed(&data->term, B9600) < 0)
+ RETURN_FAIL("cfsetspeed() failed");
+ baud_nonstd = config->baudrate;
+#elif defined(USE_TERMIOS_SPEED)
+ baud_nonstd = 1;
+#else
+ RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");