|
static private InvalidDestinationBufferIndex ( int maxLen, int dstOffset, string parameterName ) : |
||
| maxLen | int | |
| dstOffset | int | |
| parameterName | string | |
| return | ||
public override long GetBytes(int i, long dataIndex, byte[] buffer, int bufferIndex, int length)
{
int maxLen = 0;
byte[] sourceArray = (byte[])this._values[i];
maxLen = sourceArray.Length;
if (dataIndex > 0x7fffffffL)
{
throw ADP.InvalidSourceBufferIndex(maxLen, dataIndex, "dataIndex");
}
int sourceIndex = (int)dataIndex;
if (buffer != null)
{
try
{
if (sourceIndex < maxLen)
{
if ((sourceIndex + length) > maxLen)
{
maxLen -= sourceIndex;
}
else
{
maxLen = length;
}
}
Array.Copy(sourceArray, sourceIndex, buffer, bufferIndex, maxLen);
}
catch (Exception exception)
{
if (ADP.IsCatchableExceptionType(exception))
{
maxLen = sourceArray.Length;
if (length < 0)
{
throw ADP.InvalidDataLength((long)length);
}
if ((bufferIndex < 0) || (bufferIndex >= buffer.Length))
{
throw ADP.InvalidDestinationBufferIndex(length, bufferIndex, "bufferIndex");
}
if ((dataIndex < 0L) || (dataIndex >= maxLen))
{
throw ADP.InvalidSourceBufferIndex(length, dataIndex, "dataIndex");
}
if ((maxLen + bufferIndex) > buffer.Length)
{
throw ADP.InvalidBufferSizeOrIndex(maxLen, bufferIndex);
}
}
throw;
}
}
return((long)maxLen);
}
public override long GetChars(int i, long dataIndex, char[]?buffer, int bufferIndex, int length)
{
// if the object doesn't contain a char[] then the user will get an exception
string s = (string)_values[i];
char[] data = s.ToCharArray();
int cchars = data.Length;
// since arrays can't handle 64 bit values and this interface doesn't
// allow chunked access to data, a dataIndex outside the rang of Int32
// is invalid
if (dataIndex > int.MaxValue)
{
throw ADP.InvalidSourceBufferIndex(cchars, dataIndex, nameof(dataIndex));
}
int ndataIndex = (int)dataIndex;
// if no buffer is passed in, return the number of characters we have
if (null == buffer)
{
return(cchars);
}
try
{
if (ndataIndex < cchars)
{
// help the user out in the case where there's less data than requested
if ((ndataIndex + length) > cchars)
{
cchars -= ndataIndex;
}
else
{
cchars = length;
}
}
Array.Copy(data, ndataIndex, buffer, bufferIndex, cchars);
}
catch (Exception e) when(ADP.IsCatchableExceptionType(e))
{
cchars = data.Length;
if (length < 0)
{
throw ADP.InvalidDataLength(length);
}
// if bad buffer index, throw
if (bufferIndex < 0 || bufferIndex >= buffer.Length)
{
throw ADP.InvalidDestinationBufferIndex(buffer.Length, bufferIndex, nameof(bufferIndex));
}
// if bad data index, throw
if (ndataIndex < 0 || ndataIndex >= cchars)
{
throw ADP.InvalidSourceBufferIndex(cchars, dataIndex, nameof(dataIndex));
}
// if there is not enough room in the buffer for data
if (cchars + bufferIndex > buffer.Length)
{
throw ADP.InvalidBufferSizeOrIndex(cchars, bufferIndex);
}
}
return(cchars);
}
public override long GetBytes(int i, long dataIndex, byte[]?buffer, int bufferIndex, int length)
{
int cbytes;
int ndataIndex;
byte[] data = (byte[])_values[i];
cbytes = data.Length;
// since arrays can't handle 64 bit values and this interface doesn't
// allow chunked access to data, a dataIndex outside the rang of Int32
// is invalid
if (dataIndex > int.MaxValue)
{
throw ADP.InvalidSourceBufferIndex(cbytes, dataIndex, nameof(dataIndex));
}
ndataIndex = (int)dataIndex;
// if no buffer is passed in, return the number of characters we have
if (null == buffer)
{
return(cbytes);
}
try
{
if (ndataIndex < cbytes)
{
// help the user out in the case where there's less data than requested
if ((ndataIndex + length) > cbytes)
{
cbytes -= ndataIndex;
}
else
{
cbytes = length;
}
}
// until arrays are 64 bit, we have to do these casts
Array.Copy(data, ndataIndex, buffer, bufferIndex, cbytes);
}
catch (Exception e) when(ADP.IsCatchableExceptionType(e))
{
cbytes = data.Length;
if (length < 0)
{
throw ADP.InvalidDataLength(length);
}
// if bad buffer index, throw
if (bufferIndex < 0 || bufferIndex >= buffer.Length)
{
throw ADP.InvalidDestinationBufferIndex(length, bufferIndex, nameof(bufferIndex));
}
// if bad data index, throw
if (dataIndex < 0 || dataIndex >= cbytes)
{
throw ADP.InvalidSourceBufferIndex(length, dataIndex, nameof(dataIndex));
}
// if there is not enough room in the buffer for data
if (cbytes + bufferIndex > buffer.Length)
{
throw ADP.InvalidBufferSizeOrIndex(cbytes, bufferIndex);
}
}
return(cbytes);
}
