RtlDecompressChunks - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTRTL_H

NTSYSAPI
NTSTATUS
NTAPI
RtlDecompressChunks(
    _Out_writes_bytes_(UncompressedBufferSize) PUCHAR UncompressedBuffer,
    _In_ ULONG UncompressedBufferSize,
    _In_reads_bytes_(CompressedBufferSize) PUCHAR CompressedBuffer,
    _In_ ULONG CompressedBufferSize,
    _In_reads_bytes_(CompressedTailSize) PUCHAR CompressedTail,
    _In_ ULONG CompressedTailSize,
    _In_ PCOMPRESSED_DATA_INFO CompressedDataInfo
    );

#endif

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This function is documented in Windows Driver Kit.