(defconstant +min-hash-table-size+ 16)
(defconstant +min-hash-table-rehash-threshold+ (float 1/16 1.0))
-;; as explained by pmai on openprojects #lisp IRC 2002-07-30: #x80000000
-;; is bigger than any possible nonEQ hash value, and thus indicates an
-;; empty slot; and EQ hash tables don't use HASH-TABLE-HASH-VECTOR
-(defconstant +magic-hash-vector-value+ #x80000000)
(defun make-hash-table (&key (test 'eql)
(size +min-hash-table-size+)
;; First check the cache. Use EQ here for speed.
(let ((cache (hash-table-cache hash-table))
(table (hash-table-table hash-table)))
-
+
(if (and cache (< cache (length table)) (eq (aref table cache) key))
(values (aref table (1+ cache)) t)
(hash-vector (hash-table-hash-vector hash-table))
(test-fun (hash-table-test-fun hash-table)))
(declare (type index index))
-
+
(cond ((or eq-based (not hash-vector))
(when eq-based
(set-header-data kv-vector sb!vm:vector-valid-hashing-subtype))
-
+
;; Search next-vector chain for a matching key.
(do ((next next (aref next-vector next)))
((zerop next))
(setf (hash-table-cache hash-table) (* 2 next))
(setf (aref kv-vector (1+ (* 2 next))) value)
(return-from %puthash value)))))
-
+
;; Pop a KV slot off the free list
(let ((free-kv-slot (hash-table-next-free-kv hash-table)))
;; Double-check for overflow.
(setf (hash-table-next-free-kv hash-table)
(aref next-vector free-kv-slot))
(incf (hash-table-number-entries hash-table))
-
+
(setf (hash-table-cache hash-table) (* 2 free-kv-slot))
(setf (aref kv-vector (* 2 free-kv-slot)) key)
(setf (aref kv-vector (1+ (* 2 free-kv-slot))) value)
-
+
;; Setup the hash-vector if necessary.
(when hash-vector
(if (not eq-based)
(setf (aref hash-vector free-kv-slot) hashing)
(aver (= (aref hash-vector free-kv-slot) +magic-hash-vector-value+))))
-
+
;; Push this slot into the next chain.
(setf (aref next-vector free-kv-slot) next)
(setf (aref index-vector index) free-kv-slot)))))))
((not (zerop (hash-table-needing-rehash hash-table)))
(flush-needing-rehash hash-table)))
- ;; For now, just clear the cache
+ ;; For now, just clear the cache
(setf (hash-table-cache hash-table) nil)
;; Search for key in the hash table.
(def!method print-object ((hash-table hash-table) stream)
(declare (type stream stream))
- (cond ((not *print-readably*)
+ (cond ((or (not *print-readably*) (not *read-eval*))
(print-unreadable-object (hash-table stream :type t :identity t)
(format stream
":TEST ~S :COUNT ~S"
(hash-table-test hash-table)
(hash-table-count hash-table))))
- ((not *read-eval*)
- (error "can't print hash tables readably without *READ-EVAL*"))
(t
(with-standard-io-syntax
(format stream