Commit 7663933a authored by Liam M. Healy's avatar Liam M. Healy
Browse files

Eliminate obsolete code

Eliminate defparameter *pass-complex-scalar-as-two-reals* and
associate comments which predate FSBV.
parent b6d847b1
;; Complex number types ;; Complex number types
;; Liam Healy 2009-01-13 21:24:05EST complex-types.lisp ;; Liam Healy 2009-01-13 21:24:05EST complex-types.lisp
;; Time-stamp: <2009-06-04 22:53:39EDT complex-types.lisp> ;; Time-stamp: <2009-11-16 12:35:49EST complex-types.lisp>
;; $Id: $
(in-package :gsl) (in-package :gsl)
...@@ -9,24 +8,6 @@ ...@@ -9,24 +8,6 @@
;;;; Complex types ;;;; Complex types
;;;;**************************************************************************** ;;;;****************************************************************************
;;; GSL represents complex variables as a struct of two reals and
;;; passes them by value (not a pointer) to functions. Few FFIs have
;;; the capability of handling that. However, it does seem to work
;;; (SBCL and CCL at least) that we can treat each complex argument as
;;; a succession of two double-float arguments, or two single-floats
;;; packed into a double float. Here we probe that the first is true;
;;; if so, functions will automatically be converted.
(defparameter *pass-complex-scalar-as-two-reals*
(eql 5.0d0
(cffi:foreign-funcall "gsl_complex_abs" :double 3.0d0 :double 4.0d0 :double)))
"A complex number can be passed as two adjacent reals.")
;;; GSL defines complex numbers in a struct, and passes the struct by
;;; value. CFFI does not support call by value for structs, so we
;;; cannot use functions that call or return complex scalars.
;;; See /usr/include/gsl/gsl_complex.h
#+fsbv #+fsbv
(fsbv:defcstruct (fsbv:defcstruct
(complex-float-c :constructor complex :deconstructor (realpart imagpart)) (complex-float-c :constructor complex :deconstructor (realpart imagpart))
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