231 lines
7.8 KiB
Common Lisp
231 lines
7.8 KiB
Common Lisp
;;; -*- Mode: Lisp; Syntax: Common-Lisp; Package: RUNES; -*-
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;;; ---------------------------------------------------------------------------
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;;; Title: Unicode strings (called RODs)
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;;; Created: 1999-05-25 22:29
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;;; Author: Gilbert Baumann <unk6@rz.uni-karlsruhe.de>
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;;; License: Lisp-LGPL (See file COPYING for details).
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;;; ---------------------------------------------------------------------------
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;;; (c) copyright 1998,1999 by Gilbert Baumann
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;;; This code is free software; you can redistribute it and/or modify it
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;;; under the terms of the version 2.1 of the GNU Lesser General Public
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;;; License as published by the Free Software Foundation, as clarified
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;;; by the "Preamble to the Gnu Lesser General Public License" found in
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;;; the file COPYING.
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;;;
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;;; This code is distributed in the hope that it will be useful,
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;;; but without any warranty; without even the implied warranty of
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;;; merchantability or fitness for a particular purpose. See the GNU
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;;; Lesser General Public License for more details.
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;;;
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;;; Version 2.1 of the GNU Lesser General Public License is in the file
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;;; COPYING that was distributed with this file. If it is not present,
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;;; you can access it from http://www.gnu.org/copyleft/lesser.txt (until
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;;; superseded by a newer version) or write to the Free Software
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;;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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;; Changes
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;;
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;; When Who What
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;; ----------------------------------------------------------------------------
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;; 1999-08-15 GB - ROD=, ROD-EQUAL
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;; RUNE<=, RUNE>=
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;; MAKE-ROD, ROD-SUBSEQ
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;; CHAR-RUNE, RUNE-CHAR, ROD-STRING, STRING-ROD
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;; new functions
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;; - Added rune reader
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;;
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(in-package :runes)
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(deftype rune () '(unsigned-byte 16))
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(deftype rod () '(array rune (*)))
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(deftype simple-rod () '(simple-array rune (*)))
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(definline rune (rod index)
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(aref rod index))
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(defun (setf rune) (new rod index)
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(setf (aref rod index) new))
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(definline %rune (rod index)
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(aref (the (simple-array (unsigned-byte 16) (*)) rod) (the fixnum index)))
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(definline (setf %rune) (new rod index)
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(setf (aref (the (simple-array (unsigned-byte 16) (*)) rod) (the fixnum index)) new))
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(defun rod-capitalize (rod)
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(warn "~S is not implemented." 'rod-capitalize)
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rod)
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(definline code-rune (x) x)
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(definline rune-code (x) x)
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(definline rune= (x y)
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(= x y))
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(defun rune-downcase (rune)
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(cond ((<= #x0041 rune #x005a) (+ rune #x20))
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((= rune #x00d7) rune)
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((<= #x00c0 rune #x00de) (+ rune #x20))
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(t rune)))
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(definline rune-upcase (rune)
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(cond ((<= #x0061 rune #x007a) (- rune #x20))
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((= rune #x00f7) rune)
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((<= #x00e0 rune #x00fe) (- rune #x20))
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(t rune)))
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(defun rune-upper-case-letter-p (rune)
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(or (<= #x0041 rune #x005a) (<= #x00c0 rune #x00de)))
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(defun rune-lower-case-letter-p (rune)
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(or (<= #x0061 rune #x007a) (<= #x00e0 rune #x00fe)
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(= rune #x00d7)))
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(defun rune-equal (x y)
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(rune= (rune-upcase x) (rune-upcase y)))
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(defun rod-downcase (rod)
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;; FIXME
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(map '(simple-array (unsigned-byte 16) (*)) #'rune-downcase rod))
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(defun rod-upcase (rod)
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;; FIXME
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(map '(simple-array (unsigned-byte 16) (*)) #'rune-upcase rod))
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(definline white-space-rune-p (char)
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(or (= char 9) ;TAB
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(= char 10) ;Linefeed
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(= char 13) ;Carriage Return
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(= char 32))) ;Space
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(definline digit-rune-p (char &optional (radix 10))
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(cond ((<= #.(char-code #\0) char #.(char-code #\9))
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(and (< (- char #.(char-code #\0)) radix)
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(- char #.(char-code #\0))))
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((<= #.(char-code #\A) char #.(char-code #\Z))
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(and (< (- char #.(char-code #\A) -10) radix)
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(- char #.(char-code #\A) -10)))
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((<= #.(char-code #\a) char #.(char-code #\z))
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(and (< (- char #.(char-code #\a) -10) radix)
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(- char #.(char-code #\a) -10))) ))
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(defun rod (x)
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(cond ((stringp x) (map 'rod #'char-code x))
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((symbolp x) (rod (string x)))
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((characterp x) (rod (string x)))
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((vectorp x) (coerce x 'rod))
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((integerp x) (map 'rod #'identity (list x)))
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(t (error "Cannot convert ~S to a ~S" x 'rod))))
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(defun runep (x)
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(and (integerp x)
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(<= 0 x #xFFFF)))
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(defun sloopy-rod-p (x)
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(and (not (stringp x))
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(vectorp x)
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(every #'runep x)))
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(defun rod= (x y)
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(and (= (length x) (length y))
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(dotimes (i (length x) t)
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(unless (rune= (rune x i) (rune y i))
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(return nil)))))
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(defun rod-equal (x y)
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(and (= (length x) (length y))
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(dotimes (i (length x) t)
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(unless (rune-equal (rune x i) (rune y i))
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(return nil)))))
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(definline make-rod (size)
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(make-array size :element-type 'rune))
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(defun char-rune (char)
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(code-rune (char-code char)))
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(defparameter *invalid-rune* nil ;;#\?
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"Rune to use as a replacement in RUNE-CHAR and ROD-STRING for runes not
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representable as characters. If NIL, an error is signalled instead.")
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(defun rune-char (rune &optional (default *invalid-rune*))
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(or (if (>= rune char-code-limit)
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default
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(or (code-char rune) default))
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(error "rune cannot be represented as a character: ~A" rune)))
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(defun rod-string (rod &optional (default-char *invalid-rune*))
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(map 'string (lambda (x) (rune-char x default-char)) rod))
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(defun string-rod (string)
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(let* ((n (length string))
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(res (make-rod n)))
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(dotimes (i n)
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(setf (%rune res i) (char-rune (char string i))))
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res))
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;;;;
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(defun rune<= (rune &rest more-runes)
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(apply #'<= rune more-runes))
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(defun rune>= (rune &rest more-runes)
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(apply #'>= rune more-runes))
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(defun rodp (object)
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(typep object 'rod))
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(defun rod-subseq (source start &optional (end (length source)))
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(unless (rodp source)
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(error "~S is not of type ~S." source 'rod))
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(unless (and (typep start 'fixnum) (>= start 0))
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(error "~S is not a non-negative fixnum." start))
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(unless (and (typep end 'fixnum) (>= end start))
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(error "END argument, ~S, is not a fixnum no less than START, ~S." end start))
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(when (> start (length source))
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(error "START argument, ~S, should be no greater than length of rod." start))
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(when (> end (length source))
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(error "END argument, ~S, should be no greater than length of rod." end))
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(locally
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(declare (type rod source)
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(type fixnum start end))
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(let ((res (make-rod (- end start))))
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(declare (type rod res))
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(do ((i (- (- end start) 1) (the fixnum (- i 1))))
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((< i 0) res)
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(declare (type fixnum i))
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(setf (%rune res i) (%rune source (the fixnum (+ i start))))))))
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(defun rod-subseq* (source start &optional (end (length source)))
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(unless (and (typep start 'fixnum) (>= start 0))
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(error "~S is not a non-negative fixnum." start))
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(unless (and (typep end 'fixnum) (>= end start))
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(error "END argument, ~S, is not a fixnum no less than START, ~S." end start))
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(when (> start (length source))
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(error "START argument, ~S, should be no greater than length of rod." start))
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(when (> end (length source))
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(error "END argument, ~S, should be no greater than length of rod." end))
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(locally
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(declare (type fixnum start end))
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(let ((res (make-rod (- end start))))
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(declare (type rod res))
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(do ((i (- (- end start) 1) (the fixnum (- i 1))))
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((< i 0) res)
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(declare (type fixnum i))
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(setf (%rune res i) (aref source (the fixnum (+ i start))))))))
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(defun rod< (rod1 rod2)
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(do ((i 0 (+ i 1)))
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(nil)
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(cond ((= i (length rod1))
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(return t))
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((= i (length rod2))
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(return nil))
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((< (aref rod1 i) (aref rod2 i))
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(return t))
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((> (aref rod1 i) (aref rod2 i))
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(return nil)))))
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