/
internal-utils.lisp
61 lines (53 loc) · 1.5 KB
/
internal-utils.lisp
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(in-package #:com.clearly-useful.generic-collection-interface)
(defun %adjustable (vector &optional (pad 0))
(let* ((n (length vector))
(vec (make-array (+ n pad)
:adjustable t
:fill-pointer n
:element-type (array-element-type vector))))
(prog1 vec
(loop
for i from 0
for elt across vector
do (setf (aref vec i) elt)))))
(defun subvec (vec start &optional (end (length vec)))
(make-array (- end start)
:displaced-to vec
:displaced-index-offset start
:element-type (array-element-type vec)))
#-ccl
(defun %empty-hash (it)
(make-hash-table
:test (hash-table-test it)
:size 0))
#+ccl
(defun %empty-hash (it)
(make-hash-table
:test (hash-table-test it)
:size 0
:weak (ccl:hash-table-weak-p it)
;; TODO : add other options ?
))
(defun %dup-hash (it)
(let ((new (%empty-hash it)))
(maphash (lambda (k v)
(setf (gethash k new) v))
it)
new))
(defun %interface-package (name
documentation
&rest exports)
(let ((master (intern (package-name *package*)
:keyword))
(name (intern (string name)
:keyword)))
`(defpackage ,name
(:use :cl ,master)
(:documentation ,documentation)
(:export ,@exports))))
(defmacro define-interface-package (name documentation
&rest exports)
"create a package named name with documentation
which uses :cl and *package*, exporting the symbols
of exports."
(apply #'%interface-package name documentation exports))