Can I write to a File object from a C extension?

[Tim Hunter]

I have a function written in C that wants to write to a FILE *
returned from fopen. I'd like to use this function to write to a File
object that has been opened for output by File.open().

Is this possible? If so, how?

 

[why the lucky stiff]

I have a function written in C that wants to write to a FILE *
returned from fopen. I'd like to use this function to write to a File
object that has been opened for output by File.open().

Is this possible? If so, how?

Poke around in rubyio.h and you'll find some macros and functions pertinent to
this.

VALUE rubyFilePtr;
OpenFile *openFilePtr;
FILE *cFilePtr;

rubyFile = rb_file_open( 'filename', 'rw' );
GetOpenFile(rubyFilePtr, openFilePtr);
rb_io_check_writable(openFilePtr);
cFilePtr = GetWriteFile(openFilePtr);

_why