Convert from FILE to fstream and vice versus

[strongdevil]

Dear everyone,

I am writing a C++ program and using fstream(ifstream and ofstream). Additionally, I am using a C open source library and its methods requires "FILE*" inputs. Therefore, I would like to ask whether there is any way to convert between FILE and fstream? I searched in the forum but there was no answer. I did google and someone said that we can convert FILE <-> file handle <-> fstream

http://www.flounder.com/handles.htm 

I tried but it didn't work. For example, they said that in order to convert from FILE * to C Library handle, using this method

http://www.flounder.com/handles.htm#FILE%20*%20to%20C%20Library%20handle 

<stdio.h>
int _fileno(FILE * f)

I wrote a simple test

        FILE * inFile;
        inFile = fopen("temp.xml", "r");
        int handle=_fileno(inFile);

However, GCC told me that "‘_fileno’ was not declared in this scope". What is wrong?

Or is there other way to do the conversion.

Thank you for your time and consideration

[helios]

_fileno() appears to be a Windows function.

[strongdevil]

Thanks helios.

If so, is there any similar function in Linux? Or is there any way to convert FILE to fstream?