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working to update pointer->procedure


From: Matt Wette
Subject: working to update pointer->procedure
Date: Fri, 30 Nov 2018 15:32:17 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1

Hi All,

I'm starting to look into libguile/foreign.c to add support for libffi's 
variadic
function calls.  My thinking is that that pointer->procedure would accept '... 
as
the last element of the arg list, and that on procedure calls one would pass a 
pair
to for each unspecified argument.  The car of the pair is the ffi type (e.g., 
int)
and the car is the value.

(use (system foreign))

(define scm-printf (pointer->procedure int (dynamic-func "printf") ('* '...)))

(scm-printf (string->pointer "ans=%d\n") (cons int 4))


Comments?

Matt




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