- (let ((result (make-string length))
- (e (* 4 entry)))
- (dotimes (i length result)
- (let ((code (dpb (aref long-decompositions (+ e 1))
- (byte 8 16)
- (dpb (aref long-decompositions (+ e 2))
- (byte 8 8)
- (aref long-decompositions (+ e 3))))))
- (setf (char result i) (code-char code)))
- (incf e 4))))))
+ (if (<= #xac00 cp #xd7a3)
+ ;; see Unicode 6.2, section 3-12
+ (let* ((sbase #xac00)
+ (lbase #x1100)
+ (vbase #x1161)
+ (tbase #x11a7)
+ (lcount 19)
+ (vcount 21)
+ (tcount 28)
+ (ncount (* vcount tcount))
+ (scount (* lcount ncount))
+ (sindex (- cp sbase))
+ (lindex (floor sindex ncount))
+ (vindex (floor (mod sindex ncount) tcount))
+ (tindex (mod sindex tcount))
+ (result (make-string length)))
+ (declare (ignore scount))
+ (setf (char result 0) (code-char (+ lbase lindex)))
+ (setf (char result 1) (code-char (+ vbase vindex)))
+ (when (> tindex 0)
+ (setf (char result 2) (code-char (+ tbase tindex))))
+ result)
+ (let ((result (make-string length))
+ (e (* 4 entry)))
+ (dotimes (i length result)
+ (let ((code (dpb (aref long-decompositions (+ e 1))
+ (byte 8 16)
+ (dpb (aref long-decompositions (+ e 2))
+ (byte 8 8)
+ (aref long-decompositions (+ e 3))))))
+ (setf (char result i) (code-char code)))
+ (incf e 4)))))))