#include "qextserialbase.h"#include <qthread.h>/*!\class QextSerialBase\version 0.70 (pre-alpha)\author Wayne RothA common base class for Win_QextSerialBase, Posix_QextSerialBase and QextSerialPort.  */#ifdef QT_THREAD_SUPPORTQMutex* QextSerialBase::mutex=NULL;unsigned long QextSerialBase::refCount=0;#endif/*!\fn QextSerialBase::QextSerialBase()Default constructor.*/QextSerialBase::QextSerialBase():QIODevice() {    char nameStr[50];#ifdef _TTY_WIN_    strcpy(nameStr, "COM1");#elif defined(_TTY_IRIX_)    strcpy(nameStr, "/dev/ttyf1");#elif defined(_TTY_HPUX_)    strcpy(nameStr, "/dev/tty1p0");#elif defined(_TTY_SUN_)    strcpy(nameStr, "/dev/ttya");#elif defined(_TTY_DIGITAL_)    strcpy(nameStr, "/dev/tty01");#elif defined(_TTY_FREEBSD_)    strcpy(nameStr, "/dev/ttyd1");#else     strcpy(nameStr, "/dev/ttyS0");#endif    setName(nameStr);}/*!\fn QextSerialBase::QextSerialBase(const char* name)Construct a port and assign it to the device specified by the name parameter.*/QextSerialBase::QextSerialBase(const char* name):QIODevice() {    setName(name);}/*!\fn QextSerialBase::~QextSerialBase()Standard destructor.*/QextSerialBase::~QextSerialBase() {#ifdef QT_THREAD_SUPPORT    refCount--;    if (mutex && refCount==0) {        delete mutex;        mutex=NULL;    }#endif}/*!\fn void QextSerialBase::setName(const char* name)Sets the name of the device associated with the object, e.g. "COM1", or "/dev/ttyS0".*/void QextSerialBase::setName(const char* name) {    memcpy(portName, name, MIN(strlen(name)+1, PORT_NAME_SIZE_LIMIT));}/*!\fn bool QextSerialBase::atEnd() constThis function will return true if the input buffer is empty (or on error), and false otherwise.Call QextSerialBase::lastError() for error information.*/bool QextSerialBase::atEnd() const {    if (size()) {        return true;         }    return false;}/*!\fn int QextSerialBase::readLine(char *data, uint maxlen)This function will read a line of buffered input from the port, stopping when either maxlen byteshave been read, the port has no more data available, or a newline is encountered.  The value returned is the length of the string that was read.  Thanks to Olivier Tubach for the original version of this function.*/int QextSerialBase::readLine(char *data, uint maxlen) {    int bytesAvail=(int)size();	    char* pCur=data;    /*if nothing waiting, return 0 length*/    if (bytesAvail<1) {	    return 0;    }    /*read a byte at a time for MIN(bytesAvail, maxlen) iterations, or until a newline*/    while (pCur<(data+bytesAvail) && --maxlen) {		    	readBlock(pCur, 1);        if (*pCur++ == '\n') {	        break;        }    }    *pCur++='\0';    /*return size of data read*/    return (pCur-data);}/*!\fn int QextSerialBase::ungetch(int)This function is included to implement the full QIODevice interface, and currently has no purpose within this class.  This function is meaningless on an unbuffered device and currentlyonly prints a warning message to that effect.*/int QextSerialBase::ungetch(int) {        /*meaningless on unbuffered sequential device - return error and print a warning*/    TTY_WARNING("QextSerialPort: ungetch() called on an unbuffered sequential device - operation is meaningless");    return -1;}/*!\fn FlowType QextSerialBase::flowControl() constReturns the type of flow control used by the port.  For a list of possible values returnedby this function, see the definition of the enum FlowType.*/FlowType QextSerialBase::flowControl() const {    return Settings.FlowControl;}/*!\fn ParityType QextSerialBase::parity() constReturns the type of parity used by the port.  For a list of possible values returned by this function, see the definition of the enum ParityType.*/ParityType QextSerialBase::parity() const {    return Settings.Parity;}/*!\fn DataBitsType QextSerialBase::dataBits() constReturns the number of data bits used by the port.  For a list of possible values returned by this function, see the definition of the enum DataBitsType.*/DataBitsType QextSerialBase::dataBits() const {    return Settings.DataBits;}/*!\fn StopBitsType QextSerialBase::stopBits() constReturns the number of stop bits used by the port.  For a list of possible return values, seethe definition of the enum StopBitsType.*/StopBitsType QextSerialBase::stopBits() const {    return Settings.StopBits;}/*!\fn BaudRateType QextSerialBase::baudRate(void) constReturns the baud rate of the serial port.  For a list of possible return values see the definition of the enum BaudRateType.*/BaudRateType QextSerialBase::baudRate(void) const {    return Settings.BaudRate;}/*!\fn bool QextSerialBase::isOpen(void) constReturns true if the port associated with the class is currently open, or false if it is not.*/bool QextSerialBase::isOpen(void) const {    return portOpen;}/*!\fn bool QextSerialBase::open(const char* name)Opens a serial port by name.  The string passed in the name parameter is associated with the object and subsequent calls to open() may use the no-parameter version.  This function has no effect if the port associated with the class is already open.  The port is also configured to the current settings, as stored in the Settings structure.*/bool QextSerialBase::open(const char* name) {    LOCK_MUTEX();    if (!portOpen) {        /*set serial port name, and call open()*/        setName(name);        UNLOCK_MUTEX();        return open();    }    UNLOCK_MUTEX();    return portOpen;}/*!\fn unsigned long QextSerialBase::lastError() constReturns the code for the last error encountered by the port, or E_NO_ERROR if the last port operation was successful.  Possible error codes are:\verbatimError                           Explanation---------------------------     -------------------------------------------------------------E_NO_ERROR                      No Error has occuredE_INVALID_FD                    Invalid file descriptor (port was not opened correctly)E_NO_MEMORY                     Unable to allocate memory tables (POSIX)E_CAUGHT_NON_BLOCKED_SIGNAL     Caught a non-blocked signal (POSIX)E_PORT_TIMEOUT                  Operation timed out (POSIX)E_INVALID_DEVICE                The file opened by the port is not a character device (POSIX)E_BREAK_CONDITION               The port detected a break conditionE_FRAMING_ERROR                 The port detected a framing error                                 (usually caused by incorrect baud rate settings)E_IO_ERROR                      There was an I/O error while communicating with the portE_BUFFER_OVERRUN                Character buffer overrunE_RECEIVE_OVERFLOW              Receive buffer overflowE_RECEIVE_PARITY_ERROR          The port detected a parity error in the received dataE_TRANSMIT_OVERFLOW             Transmit buffer overflowE_READ_FAILED                   General read operation failureE_WRITE_FAILED                  General write operation failure\endverbatim*/unsigned long QextSerialBase::lastError() const {    return lastErr;}/*!\fn const char* QextSerialBase::name() constReturns a pointer to a string containing the name of the device associated with the object*/const char* QextSerialBase::name() const {    return portName;}/*!\fn void QextSerialBase::construct(void)Common constructor function, called by all versions of Win_QextSerialPort::Win_QextSerialPort().Sets up default port settings (115200 8N1 Hardware flow control where supported, otherwise noflow control, and 500 ms timeout).*/void QextSerialBase::construct(void) {#ifdef QT_THREAD_SUPPORT    if (!mutex) {        mutex=new QMutex(TRUE);    }    refCount++;#endif    portOpen=false;}/*!\fn bool QextSerialBase::isOpen(void)Returns true if the port is currently open, false otherwise*/bool QextSerialBase::isOpen(void) {    return portOpen;}