status_t Init(const BPackageData& data)
{
fOffset = data.Offset();
fCompressedSize = data.CompressedSize();
fUncompressedSize = data.UncompressedSize();
fChunkSize = data.ChunkSize();
// validate chunk size
if (fChunkSize == 0)
fChunkSize = B_HPKG_DEFAULT_DATA_CHUNK_SIZE_ZLIB;
if (fChunkSize < kMinSaneZlibChunkSize
|| fChunkSize > kMaxSaneZlibChunkSize) {
return B_BAD_DATA;
}
fChunkCount = (fUncompressedSize + (fChunkSize - 1)) / fChunkSize;
fOffsetTableSize = (fChunkCount - 1) * sizeof(uint64);
if (fOffsetTableSize >= fCompressedSize)
return B_BAD_DATA;
// allocate a buffer for the offset table
if (fChunkCount > 1) {
fOffsetTableBufferEntryCount = std::min(fChunkCount - 1,
(uint64)kMaxZlibOffsetTableBufferSize);
fOffsetTable = new(std::nothrow) uint64[
fOffsetTableBufferEntryCount];
if (fOffsetTable == NULL)
return B_NO_MEMORY;
fOffsetTableIndex = -1;
// mark the table content invalid
} else
fChunkSize = fUncompressedSize;
// mark uncompressed content invalid
fUncompressedChunk = -1;
return B_OK;
}
status_t Init(const BPackageData& data)
{
fOffset = data.Offset();
fSize = data.UncompressedSize();
return B_OK;
}