What is the behavior of file ranges in different parts of the cfapi?

oknick 101 Reputation points
2022-02-05T05:07:56.993+00:00

In the CfHydratePlaceholder and CfDehydratePlaceholder functions, it is explicitly said that a length parameter of -1 indicates EOF. However, in other functions and structs around the API, it is not so clear. For example, CF_FILE_RANGE, AckData (in CF_OPERATION_PARAMETERS), and ValidateData (in CF_CALLBACK_PARAMETERS). Do the functions/structs I listed have the same behavior (-1 to indicate EOF) or not?

Also, side question: is CfDehydratePlaceholder deprecated? It's only documented in the legacy docs, yet it's used in the cloud-mirror sample.

Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
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  1. Xiaopo Yang - MSFT 11,256 Reputation points Microsoft Vendor
    2022-02-07T06:49:47.553+00:00

    Hello,

    Welcome to Microsoft Q&A!

    If the document doesn‘t say -1 indicates EOF, these functions/structs don't have the same behavior. Also CloudMirror doesn't use the undocumented value -1.
    For CfDehydratePlaceholder document, I‘m trying to consult the one who is more likely to know the answer.

    Thank you.

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