size_t BitmapEncoding::Bitmap::decompress(void const* src, size_t size, Chunk& chunk)
{
size_t chunkSize = chunk.getSize();
TypeId type = chunk.getAttributeDesc().getType();
_elementSize = TypeLibrary::getType(type).byteSize();
/* No more immutable arrays, to keep consistent with old code, always treat data as string
*/
_bitmapElements = chunkSize;
_elementSize = 1;
if(!_bitmapElements) { return chunkSize; }
uint8_t* dst = (uint8_t*)chunk.getDataForLoad();
ByteInputItr in((uint8_t *)src, size);
uint32_t bmLength = ceil(_bitmapElements / 8.0);
uint32_t individualBMLength = bmLength + _elementSize; // value + bm
assert(individualBMLength);
uint32_t bitmaps = size / individualBMLength;
boost::scoped_array<uint8_t> bitmapArr(new uint8_t[bmLength]);
boost::scoped_array<uint8_t> baseValueArr(new uint8_t[_elementSize]);
uint8_t *bitmap = bitmapArr.get();
uint8_t *baseValue = baseValueArr.get();
for(uint32_t i = 0; i < bitmaps; ++i)
{
if(in.getArray(baseValue, _elementSize) == -1) { return 0; }
if(in.getArray(bitmap, bmLength)== -1) { return 0; }
decodeBitmap(baseValue, bitmap, dst);
}
return chunkSize;
}
size_t BitmapEncoding::Bitmap::decompress(void const* src, size_t size, Chunk& chunk)
{
size_t chunkSize = chunk.getSize();
TypeId type = chunk.getAttributeDesc().getType();
_elementSize = TypeLibrary::getType(type).byteSize();
if(_elementSize == 0 || _elementSize > 8 || chunk.isSparse() || !chunk.getArrayDesc().isImmutable() || chunk.getAttributeDesc().isNullable())
{
_bitmapElements = chunkSize;
_elementSize = 1;
}
else
{
_bitmapElements = chunkSize / _elementSize;
}
if(!_bitmapElements) { return chunkSize; }
uint8_t* dst = (uint8_t*)chunk.getData();
ByteInputItr in((uint8_t *)src, size);
uint32_t bmLength = ceil(_bitmapElements / 8.0);
uint32_t individualBMLength = bmLength + _elementSize; // value + bm
assert(individualBMLength);
uint32_t bitmaps = size / individualBMLength;
boost::scoped_array<uint8_t> bitmapArr(new uint8_t[bmLength]);
boost::scoped_array<uint8_t> baseValueArr(new uint8_t[_elementSize]);
uint8_t *bitmap = bitmapArr.get();
uint8_t *baseValue = baseValueArr.get();
for(uint32_t i = 0; i < bitmaps; ++i)
{
if(in.getArray(baseValue, _elementSize) == -1) { return 0; }
if(in.getArray(bitmap, bmLength)== -1) { return 0; }
decodeBitmap(baseValue, bitmap, dst);
}
return chunkSize;
}