bool GenericCompressedData::decompress(uint8_t* destination, size_t bufferSize, size_t* decompressedByteCount)
{
if (decompressedByteCount)
*decompressedByteCount = 0;
z_stream stream;
memset(&stream, 0, sizeof(stream));
stream.zalloc = zAlloc;
stream.zfree = zFree;
stream.data_type = Z_BINARY;
stream.opaque = Z_NULL;
stream.next_out = destination;
stream.avail_out = bufferSize;
stream.next_in = m_data;
stream.avail_in = compressedSize();
if (inflateInit(&stream) != Z_OK) {
ASSERT_NOT_REACHED();
return false;
}
int inflateResult = inflate(&stream, Z_FINISH);
inflateEnd(&stream);
ASSERT(stream.total_out <= bufferSize);
if (decompressedByteCount)
*decompressedByteCount = stream.total_out;
if (inflateResult != Z_STREAM_END) {
ASSERT_NOT_REACHED();
return false;
}
return true;
}
int cartesianIndex( const int compressedElementIndex ) const
{
assert( compressedElementIndex >= 0 && compressedElementIndex < compressedSize() );
return grid_.globalCell()[ compressedElementIndex ];
}