17   if (_pos >= Buf.Size())  in Read()
19   size_t rem = Buf.Size() - (size_t)_pos;  in Read()
22   memcpy(data, (const Byte *)Buf + (size_t)_pos, rem);  in Read()
23   _pos += rem;  in Read()
34     case STREAM_SEEK_CUR: offset += _pos; break;  in Seek()
40   _pos = offset;  in Seek()
52   if (_pos >= _size)  in Read()
54   size_t rem = _size - (size_t)_pos;  in Read()
57   memcpy(data, _data + (size_t)_pos, rem);  in Read()
58   _pos += rem;  in Read()
69     case STREAM_SEEK_CUR: offset += _pos; break;  in Seek()
75   _pos = offset;  in Seek()
160   size_t rem = _size - _pos;  in Write()
165     memcpy(_buffer + _pos, data, rem);  in Write()
166     _pos += rem;  in Write()
222   _pos = 0;  in Init()
234   if (_pos >= _size)  in Read()
238     UInt64 rem = _size - _pos;  in Read()
245     UInt64 cacheTag = _pos >> _blockSizeLog;  in Read()
257     size_t offset = (size_t)_pos & (((size_t)1 << _blockSizeLog) - 1);  in Read()
263     _pos += cur;  in Read()
275     case STREAM_SEEK_CUR: offset += _pos; break;  in Seek()
281   _pos = offset;  in Seek()