fileno.cpp

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//
// fileno.cpp
//
//      Copyright (c) Microsoft Corporation.  All rights reserved.
//
// Defines _fileno(), which returns the lowio file handle for the given stdio
// stream.
//
#include <corecrt_internal_stdio.h>
 
 
 
extern "C" int __cdecl _fileno(FILE* const public_stream)
{
    __crt_stdio_stream const stream(public_stream);
 
    _VALIDATE_RETURN(stream.valid(), EINVAL, -1);
    return stream.lowio_handle();
}