public InputStreamReader(
InputStream stream)
{
inStream = new System.IO.StreamReader(stream);
}
/*
** Name: close
**
** Description:
** Close the associated I/O stream.
**
** Input:
** None.
**
** Output:
** None.
**
** Returns:
** void
**
** History:
** 9-Jun-99 (gordy)
** Created.
** 29-Sep-99 (gordy)
** A recursive loop can occur if a flush fails, which
** calls close() which calls flush(), etc. Made sure
** close() won't recurse by setting the closed flag
** prior to calling flush().*/
/// <summary>
/// Close the associated I/O stream.
/// </summary>
public virtual void close()
{
lock(this)
{
if (!closed)
{
closed = true;
if (inputStream != null)
try
{
inputStream.Close();
}
catch (Exception /* ignore */)
{
}
if (outputStream != null)
{
try
{
setSegSize();
flushBuffer(true);
}
catch (Exception /* ignore */)
{
}
try
{
outputStream.Close();
}
catch (Exception /* ignore */)
{
}
}
clearBuffer();
inputStream = null;
outputStream = null;
if (trace.enabled(3))
trace.write(title + ": closed");
}
return ;
}
}
/*
** Name: setBinaryStream
**
** Description:
** Assign a byte stream as the data value.
** The data value will be NULL if the input
** value is null, otherwise non-NULL.
**
** Input:
** value Byte stream (may be null).
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 1-Dec-03 (gordy)
** Created.
*/
public override void setBinaryStream(InputStream value)
{
setStream(value);
return;
}
/*
** Name: set
**
** Description:
** Assign a new non-NULL data value.
**
** Input:
** stream The new data value.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 12-Sep-03 (gordy)
** Created.
*/
public void set( InputStream stream )
{
setStream(stream);
return;
}
protected internal new ITrace trace; // DAM-TL tracing (overrides IoBuff)
#endregion Fields
#region Constructors
/*
** Name: InBuff
**
** Description:
** Class constructor.
**
** Input:
** in Associated input stream.
** id Connection ID.
** size Length of input buffer.
**
** Output:
** None.
**
** History:
** 16-Jun-99 (gordy)
** Created.
*/
/// <summary>
/// Allocate an input stream and its buffer.
/// </summary>
/// <param name="inputStream">Associated input stream.</param>
/// <param name="id">Connection ID.</param>
/// <param name="size">Length of input buffer.</param>
public InBuff(InputStream inputStream, int id, int size)
: base(inputStream)
{
title = "InBuff[" + id + "]";
trace = new Tracing(DAM_TL_TRACE_ID);
BuffSize = size;
}
/*
** Name: cnvtUnicode
**
** Description:
** Helper method to convert Unicode stream into
** character stream.
**
** Input:
** stream Unicode stream to be converted.
**
** Output:
** None.
**
** Returns:
** Reader Character stream.
**
** History:
** 1-Dec-03 (gordy)
** Created.
*/
public static Reader cnvtUnicode(InputStream stream)
{
try { return (new InputStreamReader(stream, "UTF-8")); }
catch (Exception)
{ throw SqlEx.get(ERR_GC401E_CHAR_ENCODE); } // Should not happen!
}
/*
** Name: cnvtIS2Rdr
**
** Description:
** Converts the byte string input stream into a Reader stream.
**
** This class uses Reader streams, so implemented as stub.
**
** Input:
** stream Input stream.
**
** Output:
** None.
**
** Returns:
** Reader Converted Reader stream.
**
** History:
** 12-Sep-03 (gordy)
*/
protected override Reader cnvtIS2Rdr( InputStream stream )
{
return( (Reader)null ); // Stub, should not be called.
}
/*
** Name: getISR
**
** Description:
** Returns an InputStreamReader for input from provided stream
** and conversion using the associated encoding .
**
** Input:
** stream InputStream to be converted.
**
** Output:
** None.
**
** Returns:
** InputStreamReader Reader for encoding conversion of stream.
**
** History:
** 6-Sep-02 (gordy)
** Created.
** 11-Nov-02 (thoda04)
** Ported to .NET Provider.
*/
public virtual InputStreamReader getISR(InputStream stream)
{
InputStreamReader isr;
if (encoding == null)
isr = new InputStreamReader(stream);
else
isr = new InputStreamReader(stream, encoding);
return (isr);
}
/*
** Name: setUnicodeStream
**
** Description:
** Set parameter to a Unicode character stream.
**
** Input:
** paramIndex Parameter index.
** stream Unicode stream.
** length Length of stream in bytes.
**
** Output:
** None.
**
** Returns:
** void
**
** History:
** 19-May-99 (gordy)
** Created.
** 2-Feb-00 (gordy)
** Send short streams as VARCHAR or VARBINARY.
** 13-Jun-00 (gordy)
** Map parameter index.
** 8-Jan-01 (gordy)
** Stream classes moved to ParamSet.
** 13-Jun-01 (gordy)
** 2.1 spec requires UTF-8 encoding for unicode streams.
** 19-Feb-03 (gordy)
** Check for alternate storage format.
** 1-Nov-03 (gordy)
** ParamSet functionality extended.
*/
public void setUnicodeStream( int paramIndex, InputStream stream, int length )
{
if ( trace.enabled() ) trace.log( title + ".setUnicodeStream( " +
paramIndex + ", " + length + " )" );
paramIndex = paramMap( paramIndex );
paramSet.init(paramIndex, ProviderType.LongVarChar);
paramSet.setUnicodeStream(paramIndex, stream);
return;
}
/*
** Abstract Methods
*/
protected virtual Reader cnvtIS2Rdr( InputStream stream )
{
throw new NotImplementedException("SqlStream.cnvtIS2Rdr impl missing.");
}
/*
** Name: copyIs2Os
**
** Description:
** Writes the contents of an InputStream to an OutputStream.
** The InputStream is closed. The OutputStream is flushed
** but not closed.
**
** Input:
** is InputStream.
** os OutputStream.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 1-Dec-03 (gordy)
** Created.
*/
protected void copyIs2Os(InputStream inputStream, OutputStream outputStream)
{
if (bbuff == null)
lock (this)
{
{ if (bbuff == null) bbuff = new byte[8192]; }
}
try
{
lock (bbuff)
{
for (int len = inputStream.read(bbuff); len >= 0;
len = inputStream.read(bbuff))
outputStream.write(bbuff, 0, len);
}
inputStream.close();
outputStream.flush();
}
catch (Exception ex)
{
try { inputStream.close(); }
catch (Exception /* ignore */) { }
try { outputStream.flush(); }
catch (Exception /* ignore */) { }
throw SqlEx.get(ERR_GC4007_BLOB_IO, ex);
}
return;
}
/*
** Name: BinIS2HexRdr
**
** Description:
** Class constructor.
**
** Input:
** stream Input stream.
**
** Output:
** None.
**
** Returns:
** None.
**
** History:
** 12-Sep-03 (gordy)
** Created.
*/
public BinIS2HexRdr( InputStream stream )
: base()
{
this.stream = stream;
}
/*
** Name: strm2array
**
** Description:
** Read a binary input stream and convert to a byte array.
** The stream is closed.
**
** Input:
** in Binary input stream.
** limit Maximum length of result, negative for no limit.
**
** Output:
** None.
**
** Returns:
** byte[] The stream as a byte array.
**
** History:
** 12-Sep-03 (gordy)
** Created.
*/
private static byte[] strm2array( InputStream inStream, int limit )
{
byte[] buff = new byte[ 8192 ];
byte[] ba = new byte[ 0 ];
int len;
try
{
while( (limit < 0 || ba.Length < limit) &&
(len = inStream.read( buff, 0, buff.Length )) >= 0 )
{
if ( limit >= 0 ) len = Math.Min( len, limit - ba.Length );
byte[] tmp = new byte[ ba.Length + len ];
if ( ba.Length > 0 ) Array.Copy( ba, 0, tmp, 0, ba.Length );
if ( len > 0 ) Array.Copy( buff, 0, tmp, ba.Length, len );
ba = tmp;
}
}
catch( Exception )
{
throw SqlEx.get( ERR_GC4007_BLOB_IO );
}
finally
{
try { inStream.close(); }
catch( Exception ) {}
}
return( ba );
}
/*
** Name: cnvtIS2Rdr
**
** Description:
** Converts the binary input stream into a Reader
** stream by converting to hex characters.
**
** Input:
** stream Input stream.
**
** Output:
** None.
**
** Returns:
** Reader Converted Reader stream.
**
** History:
** 12-Sep-03 (gordy)
*/
protected override Reader cnvtIS2Rdr( InputStream stream )
{
return( new BinIS2HexRdr( stream ) );
}
public InputStreamReader(
InputStream stream, System.Text.Encoding encoding)
{
inStream = new System.IO.StreamReader(stream, encoding);
}
/*
** Name: setAsciiStream
**
** Description:
** Set parameter to an ASCII character stream.
**
** Input:
** paramIndex Parameter index.
** stream ASCII stream.
** length Length of stream in bytes.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 19-May-99 (gordy)
** Created.
** 2-Feb-00 (gordy)
** Send short streams as VARCHAR or VARBINARY.
** 13-Jun-00 (gordy)
** Map parameter index.
** 8-Jan-01 (gordy)
** Stream classes moved to ParamSet.
** 1-Jun-01 (gordy)
** No longer need wrapper class for Reader, so use
** wrapper class to convert InputStream to Reader.
** 19-Feb-03 (gordy)
** Check for alternate storage format.
** 1-Nov-03 (gordy)
** ParamSet functionality extended.
** 14-Sep-05 (gordy)
** If stream is short enough, save as VARCHAR.
*/
public void setAsciiStream( int paramIndex, InputStream stream, int length )
{
if ( trace.enabled() ) trace.log( title + ".setAsciiStream( " +
paramIndex + ", " + length + " )" );
/*
** Check length to see if can be sent as VARCHAR.
** Ingres won't coerce CLOB to VARCHAR, but will
** coerce VARCHAR to CLOB, so VARCHAR is preferred.
*/
if ( length >= 0 && length <= (conn.ucs2_supported ? conn.max_nvch_len
: conn.max_vchr_len) )
{
char[] chars = new char[ length ];
if ( length > 0 )
try
{
Reader rdr = new InputStreamReader( stream, "US-ASCII" );
int len = rdr.read( chars );
if ( len != length )
{
/*
** Character array limits read so any difference
** must be a truncation.
*/
if ( trace.enabled( 1 ) )
trace.write( tr_id + ".setAsciiStream: read only " +
len + " of " + length + " characters!" );
setWarning( DataTruncation( paramIndex, true,
false, length, len ) );
}
}
catch( IOException )
{ throw SqlEx.get( ERR_GC4007_BLOB_IO ); }
paramIndex = paramMap( paramIndex );
paramSet.init( paramIndex, ProviderType.VarChar );
paramSet.setString( paramIndex, new String( chars ) );
}
else
{
paramIndex = paramMap( paramIndex );
paramSet.init( paramIndex, ProviderType.LongVarChar );
paramSet.setAsciiStream( paramIndex, stream );
}
return;
}
public InputStreamReader(
InputStream stream, String charSetName)
{
System.Text.Encoding encoding;
if (charSetName == "UTF-8")
encoding = System.Text.Encoding.UTF8;
else if (charSetName == "ASCII" || charSetName == "US-ASCII" )
encoding = System.Text.Encoding.ASCII;
else throw new ArgumentOutOfRangeException(
"charSetName", "Must be \"UTF-8\" or \"ASCII\".");
inStream = new System.IO.StreamReader(stream, encoding);
}
/*
** Name: setBinaryStream
**
** Description:
** Set parameter to a binary stream.
**
** Input:
** paramIndex Parameter index.
** stream Binary stream.
** length Length of stream in bytes.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 19-May-99 (gordy)
** Created.
** 2-Feb-00 (gordy)
** Send short streams as VARCHAR or VARBINARY.
** 13-Jun-00 (gordy)
** Map parameter index.
** 8-Jan-01 (gordy)
** Stream classes moved to ParamSet.
** 1-Jun-01 (gordy)
** No longer need wrapper class for binary InputStream.
** 1-Nov-03 (gordy)
** ParamSet functionality extended.
** 14-Sep-05 (gordy)
** If stream is short enough, save as VARBINARY.
*/
public void setBinaryStream( int paramIndex, InputStream stream, int length )
{
if ( trace.enabled() ) trace.log( title + ".setBinaryStream( " +
paramIndex + ", " + length + " )" );
/*
** Check length to see if can be sent as VARBINARY.
** Ingres won't coerce BLOB to VARBINARY, but will
** coerce VARBINARY to BLOB, so VARBINARY is preferred.
*/
if ( length >= 0 && length <= conn.max_vbyt_len )
{
byte[] bytes = new byte[ length ];
if ( length > 0 )
try
{
int len = stream.read( bytes );
if ( len != length )
{
/*
** Byte array limits read so any difference
** must be a truncation.
*/
if ( trace.enabled( 1 ) )
trace.write( tr_id + ".setBinaryStream: read only " +
len + " of " + length + " bytes!" );
setWarning( DataTruncation( paramIndex, true,
false, length, len ) );
}
}
catch( IOException )
{ throw SqlEx.get( ERR_GC4007_BLOB_IO ); }
paramIndex = paramMap( paramIndex );
paramSet.init(paramIndex, ProviderType.VarBinary);
paramSet.setBytes( paramIndex, bytes );
}
else
{
paramIndex = paramMap( paramIndex );
paramSet.init(paramIndex, ProviderType.LongVarBinary);
paramSet.setBinaryStream( paramIndex, stream );
}
return;
}
/*
** Name: setUnicodeStream
**
** Description:
** Assign a Unicode stream as the data value.
** The data value will be NULL if the input
** value is null, otherwise non-NULL.
**
** Input:
** value Unicode stream (may be null).
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 1-Dec-03 (gordy)
** Created.
*/
public override void setUnicodeStream(InputStream value)
{
if (value == null)
setNull();
else
setStream(cnvtUnicode(value));
return;
}
/*
** Name: setUnicodeStream
**
** Description:
** Set parameter to a Unicode stream. If the parameter has not
** been initialized for a specific SQL type, the LONGVARCHAR type
** will be used.
**
** Input:
** index Parameter index.
** value Unicode stream.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 1-Dec-03 (gordy)
** Created.
*/
public void setUnicodeStream( int index, InputStream value )
{
Param param = check( index );
lock( param )
{
if (param.value == null) set(param, ProviderType.LongVarChar,
useAltStorage( ProviderType .LongVarChar ) );
param.value.setUnicodeStream( value );
param.flags |= (ushort)(PS_FLG_SET | dflt_flags);
}
return;
}
/*
** Name: setAsciiStream
**
** Description:
** Assign a ASCII stream as the data value.
** The data value will be NULL if the input
** value is null, otherwise non-NULL.
**
** Input:
** value ASCII stream (may be null).
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 1-Dec-03 (gordy)
** Created.
*/
public override void setAsciiStream(InputStream value)
{
if (value == null)
setNull();
else
setStream(cnvtAscii(value));
return;
}
public void updateBinaryStream( int index, InputStream inStream, int length )
{
if ( trace.enabled() ) trace.log( title + ".updateBinaryStream(" +
index + "," + length + ")" );
}
/*
** Name: cnvtIS2Rdr
**
** Description:
** Converts the byte string input stream into a Reader
** stream using the associated character-set.
**
** Input:
** stream Input stream.
**
** Output:
** None.
**
** Returns:
** Reader Converted Reader stream.
**
** History:
** 12-Sep-03 (gordy)
*/
protected override Reader cnvtIS2Rdr( InputStream stream )
{
try
{
return( charSet.getISR( stream ) );
}
catch( Exception ex) // Should not happen!
{
throw SqlEx.get( ERR_GC401E_CHAR_ENCODE, ex );
}
}
public void updateBinaryStream( String name, InputStream inStream, int length )
{
updateBinaryStream( columnByName( name ), inStream, length );
}
private int seg_end; // End of current segment.
#endregion Fields
#region Constructors
/*
** Name: IoBuff
**
** Description:
** Class constructor for input buffers. Sub-class must set
** buffer size to initialize the input buffer.
**
** Input:
** ioStream The associated input/output stream.
** fileAccess Read or Write to indicate direction of stream
**
** Output:
** None.
**
** History:
** 9-Jun-99 (gordy)
** Created.
** 28-Mar-01 (gordy)
** Separated tracing interface and implementation.*/
/// <summary>
/// Class constructor for input buffers. Sub-class must set
/// buffer size to initialize the input buffer.
/// </summary>
/// <param name="inStream"></param>
protected internal IoBuff(InputStream inStream)
{
trace = new Tracing(DAM_NL_TRACE_ID);
title = "IoBuff[in]";
this.inputStream = inStream;
}
public virtual void setUnicodeStream(InputStream value)
{
throw SqlEx.get(ERR_GC401A_CONVERSION_ERR);
}
/*
** Name: connect
**
** Description:
** Establish connection with target server. Initializes
** the input buffer.
**
** Input:
** host Host name or address.
** portID Symbolic or numeric port ID.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 7-Jun-99 (gordy)
** Created.
** 17-Nov-99 (gordy)
** Extracted input functionality from DbConn.
** 3-Nov-08 (gordy, ported by thoda04)
** Extracted from constructor.
*/
protected internal override void connect(String host, String portID)
{
base.connect( host, portID );
try
{
InputStream inputStream = new InputStream(socket.getInputStream());
inBuff = new InBuff(inputStream, ConnID, 1 << DAM_TL_PKT_MIN);
}
catch (Exception ex)
{
if (trace.enabled(1))
trace.write(title + ": error creating input buffer: " +
ex.Message);
disconnect();
throw SqlEx.get(ERR_GC4001_CONNECT_ERR, ex);
}
return;
}
/*
** Name: write (inputStream)
**
** Description:
** Append input stream to the output buffer. This
** routine does not split buffers, the input stream
** is read until the buffer is filled or the stream
** is exhausted. The number of bytes read from the
** input stream is returned. It is the callers
** responsibility to assure that there is space
** available in the output buffer.
**
** Input:
** inputStream InputStream
**
** Output:
** None.
**
** Returns:
** short Number of bytes written.
**
** History:
** 29-Sep-99 (gordy)
** Created.
*/
/// <summary>
/// Append input stream to the output buffer. This
/// routine does not split buffers, the input stream
/// is read until the buffer is filled or the stream
/// is exhausted. The number of bytes read from the
/// input stream is returned. It is the callers
/// responsibility to assure that there is space
/// available in the output buffer.
/// </summary>
/// <param name="inputStream"></param>
/// <returns></returns>
public virtual short write(InputStream inputStream)
{
int length = avail();
try
{
length = inputStream.read(buffer, data_ptr, length);
}
catch (System.Exception ex)
{
throw SqlEx.get( ERR_GC4007_BLOB_IO, ex);
}
if (length < 0)
length = 0;
data_ptr += length;
if (trace.enabled(5))
trace.write(title + ": appending " + length);
return ((short) length);
}
