; write the declaration tree to a package

(in-package "VERRAZANO-CFFI")

; write declarations to a file
(defun write-declarations (defns cfg bst)
  (with-open-file (out (configuration-output-filename cfg)
		       :direction :output :if-exists :supersede)
    (let ((pkgform `("defpackage" 
										 ,(configuration-binding-name cfg)
										 (":use" "#:CFFI")
										 ,(cons ":nicknames" 
														(configuration-binding-nicknames cfg))
										 ,(cons ":export" (generate-export-list cfg bst)))))
			(format out "~A~%~%" pkgform)
      (format out "(in-package ~A)~%" (configuration-binding-name cfg))
      (format out "(asdf:operate 'asdf:load-op 'verrazano-support)~%"))
    (dolist (defn defns)
      (format out "~A~%" defn))))

; generate a list of symbols to export
(defun generate-export-list (cfg bst)
  (let ((hidden (configuration-symbols-hidden cfg))
	(explist nil))
    (maphash #'(lambda (tp ttab)
		 (declare (ignore tp))
		 (maphash #'(lambda (sk sv)
			      (declare (ignore sv))
			      (when (not (member sk hidden))
				(push (string-upcase (quote-string sk))
				      explist)))
			  ttab)) 
		 (cffi-state-symbols bst))
    explist))