private static System.String GetMessage(int errorCode)
{
StringBuilder sb = new StringBuilder(512);
int result = Win32API_Serial.FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ARGUMENT_ARRAY,
Win32API_Serial.NULL, errorCode, 0, sb, sb.Capacity, Win32API_Serial.NULL);
if (result != 0)
{
System.String s = sb.ToString();
return(s);
}
else
{
return(GetResourceString("IO_UnknownError", errorCode));
}
}
public string ReadLine()
{
if (!isOpen)
{
throw new InvalidOperationException("Serial Port Read - port not open");
}
string inBufferString;
bool carriageReturnFlag = false;
int startTicks = Win32API_Serial.GetTickCount();
int lastChar;
int beginReadPos = readPos;
char [] charTestBuf = new char[1];
charTestBuf[0] = '\r';
int crLength = encoding.GetByteCount(charTestBuf);
charTestBuf[0] = '\n';
int lfLength = encoding.GetByteCount(charTestBuf);
int timeUsed = 0;
int timeNow;
readLen += internalSerialStream.Read(inBuffer, readLen, InBufferBytes - (readLen - readPos));
while (true)
{
timeNow = Win32API_Serial.GetTickCount();
lastChar = ReadOneChar((readTimeout == InfiniteTimeout) ? InfiniteTimeout : readTimeout - timeUsed);
timeUsed += Win32API_Serial.GetTickCount() - timeNow;
if (lastChar == -1)
{
break;
}
if ((char)lastChar == '\r')
{
if (InBufferBytes == 0)
{
inBufferString = encoding.GetString(inBuffer, beginReadPos, readPos - beginReadPos - crLength);
readPos = readLen = 0;
return(inBufferString);
}
else if (carriageReturnFlag == true)
{
inBufferString = encoding.GetString(inBuffer, beginReadPos, readPos - beginReadPos - 2 * crLength);
readPos -= crLength;
return(inBufferString);
}
else
{
carriageReturnFlag = true;
}
}
else if ((char)lastChar == '\n')
{
if (carriageReturnFlag == true)
{
inBufferString = encoding.GetString(inBuffer, beginReadPos, readPos - beginReadPos - crLength - lfLength);
if (readPos == readLen)
{
readPos = readLen = 0;
}
return(inBufferString);
}
else
{
inBufferString = encoding.GetString(inBuffer, beginReadPos, readPos - beginReadPos - lfLength);
if (readPos == readLen)
{
readPos = readLen = 0;
}
return(inBufferString);
}
}
else
{
if (carriageReturnFlag == true)
{
charTestBuf[0] = (char)lastChar;
int lastCharLength = encoding.GetByteCount(charTestBuf);
inBufferString = encoding.GetString(inBuffer, beginReadPos, readPos - beginReadPos - crLength - lastCharLength);
readPos -= lastCharLength;
return(inBufferString);
}
}
}
readPos = beginReadPos;
return((string)null);
}
public int Read(char[] buffer, int offset, int count)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer", Resources.GetResourceString("ArgumentNull_Buffer"));
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset", Resources.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
}
if (count < 0)
{
throw new ArgumentOutOfRangeException("count", Resources.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
}
if (buffer.Length - offset < count)
{
throw new ArgumentException(Resources.GetResourceString("Argument_InvalidOffLen"));
}
if (!isOpen)
{
throw new InvalidOperationException("Serial Port Read - port not open");
}
if (count == 0)
{
return(0);
}
int bytesInDriver = InBufferBytes - (readLen - readPos);
if (readLen + bytesInDriver >= inBuffer.Length)
{
ResizeBuffer();
}
internalSerialStream.Read(inBuffer, readLen, bytesInDriver);
readLen += bytesInDriver;
int charsWeAlreadyHave = encoding.GetCharCount(inBuffer, readPos, readLen - readPos);
if (charsWeAlreadyHave >= count)
{
return(ReadBufferIntoChars(buffer, offset, count));
}
if (readTimeout == 0)
{
return(ReadBufferIntoChars(buffer, offset, count));
}
int startTicks = Win32API_Serial.GetTickCount();
int justRead;
do
{
internalSerialStream.Read(inBuffer, readLen, Encoding.GetMaxByteCount(count - charsWeAlreadyHave));
justRead = ReadBufferIntoChars(buffer, offset, count);
if (justRead > 0)
{
return(justRead);
}
} while (readTimeout == SerialPort.InfiniteTimeout || readTimeout - (Win32API_Serial.GetTickCount() - startTicks) > 0);
return(0);
}
private int ReadOneChar(int timeout)
{
int beginReadPos = readPos;
int nextByte;
int timeUsed = 0;
Debug.Assert(isOpen, "ReadOneChar - port not open");
if (timeout < 0 && timeout != SerialPort.InfiniteTimeout)
{
return(-1);
}
if (encoding.GetCharCount(inBuffer, readPos, readLen - readPos) != 0)
{
do
{
nextByte = (int)inBuffer[readPos++];
} while (encoding.GetCharCount(inBuffer, beginReadPos, readPos - beginReadPos) < 1);
encoding.GetChars(inBuffer, beginReadPos, readPos - beginReadPos, oneChar, 0);
return(oneChar[0]);
}
else
{
if (timeout == 0)
{
if (InBufferBytes + readPos >= inBuffer.Length)
{
ResizeBuffer();
}
int bytesRead = internalSerialStream.Read(inBuffer, readLen, InBufferBytes - (readLen - readPos)); // read all immediately avail.
readLen += bytesRead;
if (ReadBufferIntoChars(oneChar, 0, 1) == 0)
{
return(-1);
}
else
{
return(oneChar[0]);
}
}
int startTicks = Win32API_Serial.GetTickCount();
do
{
timeUsed = Win32API_Serial.GetTickCount() - startTicks;
if (timeout != SerialPort.InfiniteTimeout && (timeout - timeUsed <= 0))
{
nextByte = -1;
break;
}
nextByte = internalSerialStream.ReadByte((timeout == InfiniteTimeout) ? InfiniteTimeout : timeout - timeUsed);
if (nextByte == -1)
{
break;
}
if (readLen >= inBuffer.Length)
{
ResizeBuffer();
}
inBuffer[readLen++] = (byte)nextByte;
readPos++;
} while (encoding.GetCharCount(inBuffer, beginReadPos, readPos - beginReadPos) < 1);
}
if (nextByte == -1)
{
return(-1);
}
encoding.GetChars(inBuffer, beginReadPos, readPos - beginReadPos, oneChar, 0);
return(oneChar[0]);
}
internal static void WinIOError(int errorCode, System.String str)
{
switch (errorCode)
{
case Win32API_Serial.ERROR_FILE_NOT_FOUND:
if (str.Length == 0)
{
throw new FileNotFoundException(GetResourceString("IO.FileNotFound"));
}
else
{
throw new FileNotFoundException(System.String.Format(GetResourceString("IO.FileNotFound_FileName"), str), str);
}
case Win32API_Serial.ERROR_PATH_NOT_FOUND:
if (str.Length == 0)
{
throw new DirectoryNotFoundException(GetResourceString("IO.PathNotFound_NoPathName"));
}
else
{
throw new DirectoryNotFoundException(System.String.Format(GetResourceString("IO.PathNotFound_Path"), str));
}
case Win32API_Serial.ERROR_ACCESS_DENIED:
if (str.Length == 0)
{
throw new System.UnauthorizedAccessException(GetResourceString("UnauthorizedAccess_IODenied_NoPathName"));
}
else
{
throw new System.UnauthorizedAccessException(System.String.Format(GetResourceString("UnauthorizedAccess_IODenied_Path"), str));
}
case Win32API_Serial.ERROR_FILENAME_EXCED_RANGE:
throw new PathTooLongException(GetResourceString("IO.PathTooLong"));
case Win32API_Serial.ERROR_INVALID_PARAMETER:
throw new IOException(GetMessage(errorCode), Win32API_Serial.MakeHRFromErrorCode(errorCode));
case Win32API_Serial.ERROR_SHARING_VIOLATION:
if (str.Length == 0)
{
throw new IOException(GetResourceString("IO.IO_SharingViolation_NoFileName"));
}
else
{
throw new IOException(GetResourceString("IO.IO_SharingViolation_File", str));
}
case Win32API_Serial.ERROR_FILE_EXISTS:
if (str.Length == 0)
{
goto default;
}
throw new IOException(System.String.Format(GetResourceString("IO.IO_FileExists_Name"), str));
default:
throw new IOException(GetMessage(errorCode), Win32API_Serial.MakeHRFromErrorCode(errorCode));
}
}
