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Supports internal operations.

#ifdef _WIN64
    typedef __int64 streamoff;
    typedef long streamoff;

The type is a signed integer that describes an object that can store a byte offset involved in various stream positioning operations. Its representation has at least 32 value bits. It is not necessarily large enough to represent an arbitrary byte position within a stream. The value streamoff(-1) generally indicates an erroneous offset.

Header: <ios>

Namespace: std

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