/// <summary>
/// WriteDataRecord - writes a data record in the form of "size - id - data"
/// The Length of the data packed is "size" - (2 * sizeof(int)).
/// Note that the cbRecordSize param is *only* the size of the record itself. The Size
/// written to the stream will be larger (by sizeof(RecordHeader)) because it includes the size
/// itself and the id.
/// </summary>
/// <param name="id"> MILCMD - the record id </param>
/// <param name="pbRecord">
/// byte* pointing to at least cbRecordSize bytes which will be copied to the stream.
/// </param>
/// <param name="cbRecordSize"> int - the size, in bytes, of pbRecord. Must be >= 0. </param>
public unsafe void WriteDataRecord(MILCMD id,
byte *pbRecord,
int cbRecordSize)
{
Debug.Assert(cbRecordSize >= 0);
// The records must always be padded to be QWORD aligned.
Debug.Assert((_curOffset % 8) == 0);
Debug.Assert((cbRecordSize % 8) == 0);
Debug.Assert((sizeof(RecordHeader) % 8) == 0);
int totalSize, newOffset;
checked
{
totalSize = cbRecordSize + sizeof(RecordHeader);
newOffset = _curOffset + totalSize;
}
// Do we need to increase the buffer size?
// Yes, if there's no buffer or if the buffer is too small.
if ((_buffer == null) || (newOffset > _buffer.Length))
{
EnsureBuffer(newOffset);
}
// At this point, _buffer must be non-null and
// _buffer.Length must be >= newOffset
Debug.Assert((_buffer != null) && (_buffer.Length >= newOffset));
// Also, because pinning a 0-length buffer fails, we assert this too.
Debug.Assert(_buffer.Length > 0);
RecordHeader header;
header.Size = totalSize;
header.Id = id;
Marshal.Copy((IntPtr)(&header), this._buffer, _curOffset, sizeof(RecordHeader));
Marshal.Copy((IntPtr)pbRecord, this._buffer, _curOffset + sizeof(RecordHeader), cbRecordSize);
_curOffset += totalSize;
}
public unsafe void WriteDataRecord(MILCMD id,
byte* pbRecord,
int cbRecordSize)
{
Debug.Assert(cbRecordSize >= 0);
// The records must always be padded to be QWORD aligned.
Debug.Assert((_curOffset % 8) == 0);
Debug.Assert((cbRecordSize % 8) == 0);
Debug.Assert((sizeof(RecordHeader) % 8) == 0);
int totalSize, newOffset;
checked
{
totalSize = cbRecordSize + sizeof(RecordHeader);
newOffset = _curOffset + totalSize;
}
// Do we need to increase the buffer size?
// Yes, if there's no buffer or if the buffer is too small.
if ((_buffer == null) || (newOffset > _buffer.Length))
{
EnsureBuffer(newOffset);
}
// At this point, _buffer must be non-null and
// _buffer.Length must be >= newOffset
Debug.Assert((_buffer != null) && (_buffer.Length >= newOffset));
// Also, because pinning a 0-length buffer fails, we assert this too.
Debug.Assert(_buffer.Length > 0);
RecordHeader header;
header.Size = totalSize;
header.Id = id;
Marshal.Copy((IntPtr)(&header), this._buffer, _curOffset, sizeof(RecordHeader));
Marshal.Copy((IntPtr)pbRecord, this._buffer, _curOffset + sizeof(RecordHeader), cbRecordSize);
_curOffset += totalSize;
}
