[Chicken-users] call Chicken Scheme from C and pass a bytevector

[Claude Marinier]

Hi,

A function in pcap-interface.c calls Chicken Scheme. It builds a vector 
containing a bunch of things, e.g. C_fix(ethtype), and the source and 
destination addresses as vectors. The scheme code converts the address 
vectors to u8vector (u16vector for IPv6). This is a lot of work: just 
under 20% of CPU time is spent in vector->u8vector.

If I could create a blob in C and pass it to scheme, the scheme code could 
use blob->u8vector/shared and blob->u16vector/shared which would achieve 
the same result with much less work.

What is the recommended way to pass a blob to scheme from C?

Is there a way to create a u8vector or u16vector directly in C?

Thank you.

--
Claude Marinier