7zip Assembly

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IArchiveExtractCallback ​

This interface is used to extract items from the archive. See IInArchive::Extract. It defines the following methods:

GetStream ​

C++
HRESULT GetStream(
    UInt32 index,
    ISequentialOutStream **outStream,
    Int32 askExtractMode
)
HRESULT GetStream(
    UInt32 index,
    ISequentialOutStream **outStream,
    Int32 askExtractMode
)

Use this method to get output steam for the item.

[in] index

The index of the item. Starts from 0 up to the numItems passed to IInArchive::Extract.

[out] outStream

The output stream to write item data to.

[in] askExtractMode

If askMode != NArchive::NExtract::NAskMode::kExtract the callee is not allowed to write data to the stream.

PrepareOperation ​

C++
HRESULT PrepareOperation(
    Int32 askExtractMode
)
HRESULT PrepareOperation(
    Int32 askExtractMode
)

Should be called at the beginning of the extract of each item.

[in] askExtractMode

Should be one of the NArchive::NExtract::NAskMode::kTest if testMode is true and NArchive::NExtract::NAskMode::kExtract otherwise.

SetOperationResult ​

C++
HRESULT SetOperationResult(
    Int32 opRes
)
HRESULT SetOperationResult(
    Int32 opRes
)

Should be called at the end of the extraction of each item.

[in] opRes

The operation result from NArchive::NExtract::NOperationResult enum.