-;;;; character functions
-;;;;
-;;;; This file assumes the use of ASCII codes and the specific
-;;;; character formats used in SBCL (and its ancestor, CMU CL). It is
-;;;; optimized for performance rather than for portability and
-;;;; elegance, and may have to be rewritten if the character
-;;;; representation is changed.
-;;;;
-;;;; FIXME: should perhaps be renamed ascii.lisp since it's an
-;;;; unportable ASCII-dependent implementation
+;;;; character implementation stuff which is to be visible at
+;;;; build-the-cross-compiler time
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
(in-package "SB!IMPL")
-;;; We compile some trivial character operations via inline expansion.
-#!-sb-fluid
-(declaim (inline standard-char-p graphic-char-p alpha-char-p
- upper-case-p lower-case-p both-case-p alphanumericp
- char-int))
-(declaim (maybe-inline digit-char-p digit-weight))
-
-(defconstant char-code-limit 256
+(defconstant sb!xc:char-code-limit 256
#!+sb-doc
"the upper exclusive bound on values produced by CHAR-CODE")
-
-(deftype char-code ()
- `(integer 0 (,char-code-limit)))
-
-(macrolet ((frob (char-names-list)
- (collect ((results))
- (dolist (code char-names-list)
- (destructuring-bind (ccode names) code
- (dolist (name names)
- (results (cons name (code-char ccode))))))
- `(defparameter *char-name-alist* ',(results)
- #!+sb-doc
- "This is the alist of (character-name . character) for characters with
- long names. The first name in this list for a given character is used
- on typeout and is the preferred form for input."))))
- (frob ((#x00 ("Null" "^@" "Nul"))
- (#x01 ("^a" "Soh"))
- (#x02 ("^b" "Stx"))
- (#x03 ("^c" "Etx"))
- (#x04 ("^d" "Eot"))
- (#x05 ("^e" "Enq"))
- (#x06 ("^f" "Ack"))
- (#x07 ("Bell" "^g" "Bel"))
- (#x08 ("Backspace" "^h" "Bs"))
- (#x09 ("Tab" "^i" "Ht"))
- (#x0A ("Newline" "Linefeed" "^j" "Lf" "Nl" ))
- (#x0B ("Vt" "^k"))
- (#x0C ("Page" "^l" "Form" "Formfeed" "Ff" "Np"))
- (#x0D ("Return" "^m" "Cr"))
- (#x0E ("^n" "So"))
- (#x0F ("^o" "Si"))
- (#x10 ("^p" "Dle"))
- (#x11 ("^q" "Dc1"))
- (#x12 ("^r" "Dc2"))
- (#x13 ("^s" "Dc3"))
- (#x14 ("^t" "Dc4"))
- (#x15 ("^u" "Nak"))
- (#x16 ("^v" "Syn"))
- (#x17 ("^w" "Etb"))
- (#x18 ("^x" "Can"))
- (#x19 ("^y" "Em"))
- (#x1A ("^z" "Sub"))
- (#x1B ("Escape" "^[" "Altmode" "Esc" "Alt"))
- (#x1C ("^\\" "Fs"))
- (#x1D ("^]" "Gs"))
- (#x1E ("^^" "Rs"))
- (#x1F ("^_" "Us"))
- (#x20 ("Space" "Sp"))
- (#x7f ("Rubout" "Delete" "Del")))))
-\f
-;;;; accessor functions
-
-(defun char-code (char)
- #!+sb-doc
- "Returns the integer code of CHAR."
- (etypecase char
- (base-char (char-code (truly-the base-char char)))))
-
-(defun char-int (char)
- #!+sb-doc
- "Returns the integer code of CHAR. This is the same as char-code, as
- CMU Common Lisp does not implement character bits or fonts."
- (char-code char))
-
-(defun code-char (code)
- #!+sb-doc
- "Returns the character with the code CODE."
- (declare (type char-code code))
- (code-char code))
-
-(defun character (object)
- #!+sb-doc
- "Coerces its argument into a character object if possible. Accepts
- characters, strings and symbols of length 1."
- (flet ((do-error (control args)
- (error 'simple-type-error
- :datum object
- ;;?? how to express "symbol with name of length 1"?
- :expected-type '(or character (string 1))
- :format-control control
- :format-arguments args)))
- (typecase object
- (character object)
- (string (if (= 1 (length (the string object)))
- (char object 0)
- (do-error
- "String is not of length one: ~S" (list object))))
- (symbol (if (= 1 (length (symbol-name object)))
- (schar (symbol-name object) 0)
- (do-error
- "Symbol name is not of length one: ~S" (list object))))
- (t (do-error "~S cannot be coerced to a character." (list object))))))
-
-(defun char-name (char)
- #!+sb-doc
- "Given a character object, char-name returns the name for that
- object (a symbol)."
- (car (rassoc char *char-name-alist*)))
-
-(defun name-char (name)
- #!+sb-doc
- "Given an argument acceptable to string, name-char returns a character
- object whose name is that symbol, if one exists. Otherwise, () is returned."
- (cdr (assoc (string name) *char-name-alist* :test #'string-equal)))
-\f
-;;;; predicates
-
-(defun standard-char-p (char)
- #!+sb-doc
- "The argument must be a character object. Standard-char-p returns T if the
- argument is a standard character -- one of the 95 ASCII printing characters
- or <return>."
- (declare (character char))
- (and (typep char 'base-char)
- (let ((n (char-code (the base-char char))))
- (or (< 31 n 127)
- (= n 10)))))
-
-(defun %standard-char-p (thing)
- #!+sb-doc
- "Return T if and only if THING is a standard-char. Differs from
- standard-char-p in that THING doesn't have to be a character."
- (and (characterp thing) (standard-char-p thing)))
-
-(defun graphic-char-p (char)
- #!+sb-doc
- "The argument must be a character object. Graphic-char-p returns T if the
- argument is a printing character (space through ~ in ASCII), otherwise
- returns ()."
- (declare (character char))
- (and (typep char 'base-char)
- (< 31
- (char-code (the base-char char))
- 127)))
-
-(defun alpha-char-p (char)
- #!+sb-doc
- "The argument must be a character object. Alpha-char-p returns T if the
- argument is an alphabetic character, A-Z or a-z; otherwise ()."
- (declare (character char))
- (let ((m (char-code char)))
- (or (< 64 m 91) (< 96 m 123))))
-
-(defun upper-case-p (char)
- #!+sb-doc
- "The argument must be a character object; upper-case-p returns T if the
- argument is an upper-case character, () otherwise."
- (declare (character char))
- (< 64
- (char-code char)
- 91))
-
-(defun lower-case-p (char)
- #!+sb-doc
- "The argument must be a character object; lower-case-p returns T if the
- argument is a lower-case character, () otherwise."
- (declare (character char))
- (< 96
- (char-code char)
- 123))
-
-(defun both-case-p (char)
- #!+sb-doc
- "The argument must be a character object. Both-case-p returns T if the
- argument is an alphabetic character and if the character exists in
- both upper and lower case. For ASCII, this is the same as Alpha-char-p."
- (declare (character char))
- (let ((m (char-code char)))
- (or (< 64 m 91) (< 96 m 123))))
-
-(defun digit-char-p (char &optional (radix 10.))
- #!+sb-doc
- "If char is a digit in the specified radix, returns the fixnum for
- which that digit stands, else returns NIL. Radix defaults to 10
- (decimal)."
- (declare (character char) (type (integer 2 36) radix))
- (let ((m (- (char-code char) 48)))
- (declare (fixnum m))
- (cond ((<= radix 10.)
- ;; Special-case decimal and smaller radices.
- (if (and (>= m 0) (< m radix)) m nil))
- ;; Digits 0 - 9 are used as is, since radix is larger.
- ((and (>= m 0) (< m 10)) m)
- ;; Check for upper case A - Z.
- ((and (>= (setq m (- m 7)) 10) (< m radix)) m)
- ;; Also check lower case a - z.
- ((and (>= (setq m (- m 32)) 10) (< m radix)) m)
- ;; Else, fail.
- (t nil))))
-
-(defun alphanumericp (char)
- #!+sb-doc
- "Given a character-object argument, alphanumericp returns T if the
- argument is either numeric or alphabetic."
- (declare (character char))
- (let ((m (char-code char)))
- (or (< 47 m 58) (< 64 m 91) (< 96 m 123))))
-
-(defun char= (character &rest more-characters)
- #!+sb-doc
- "Returns T if all of its arguments are the same character."
- (do ((clist more-characters (cdr clist)))
- ((atom clist) T)
- (unless (eq (car clist) character) (return nil))))
-
-(defun char/= (character &rest more-characters)
- #!+sb-doc
- "Returns T if no two of its arguments are the same character."
- (do* ((head character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (do* ((l list (cdr l))) ;inner loop returns T
- ((atom l) T) ; iff head /= rest.
- (if (eq head (car l)) (return nil)))
- (return nil))))
-
-(defun char< (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly increasing alphabetic order."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (< (char-int c)
- (char-int (car list)))
- (return nil))))
-
-(defun char> (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly decreasing alphabetic order."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (> (char-int c)
- (char-int (car list)))
- (return nil))))
-
-(defun char<= (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly non-decreasing alphabetic order."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (<= (char-int c)
- (char-int (car list)))
- (return nil))))
-
-(defun char>= (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly non-increasing alphabetic order."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (>= (char-int c)
- (char-int (car list)))
- (return nil))))
-
-;;; Equal-Char-Code is used by the following functions as a version of char-int
-;;; which loses font, bits, and case info.
-
-(defmacro equal-char-code (character)
- `(let ((ch (char-code ,character)))
- (if (< 96 ch 123) (- ch 32) ch)))
-
-(defun char-equal (character &rest more-characters)
- #!+sb-doc
- "Returns T if all of its arguments are the same character.
- Font, bits, and case are ignored."
- (do ((clist more-characters (cdr clist)))
- ((atom clist) T)
- (unless (= (equal-char-code (car clist))
- (equal-char-code character))
- (return nil))))
-
-(defun char-not-equal (character &rest more-characters)
- #!+sb-doc
- "Returns T if no two of its arguments are the same character.
- Font, bits, and case are ignored."
- (do* ((head character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (do* ((l list (cdr l)))
- ((atom l) T)
- (if (= (equal-char-code head)
- (equal-char-code (car l)))
- (return nil)))
- (return nil))))
-
-(defun char-lessp (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly increasing alphabetic order.
- Font, bits, and case are ignored."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (< (equal-char-code c)
- (equal-char-code (car list)))
- (return nil))))
-
-(defun char-greaterp (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly decreasing alphabetic order.
- Font, bits, and case are ignored."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (> (equal-char-code c)
- (equal-char-code (car list)))
- (return nil))))
-
-(defun char-not-greaterp (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly non-decreasing alphabetic order.
- Font, bits, and case are ignored."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (<= (equal-char-code c)
- (equal-char-code (car list)))
- (return nil))))
-
-(defun char-not-lessp (character &rest more-characters)
- #!+sb-doc
- "Returns T if its arguments are in strictly non-increasing alphabetic order.
- Font, bits, and case are ignored."
- (do* ((c character (car list))
- (list more-characters (cdr list)))
- ((atom list) T)
- (unless (>= (equal-char-code c)
- (equal-char-code (car list)))
- (return nil))))
-\f
-;;;; miscellaneous functions
-
-(defun char-upcase (char)
- #!+sb-doc
- "Returns CHAR converted to upper-case if that is possible."
- (declare (character char))
- (if (lower-case-p char)
- (code-char (- (char-code char) 32))
- char))
-
-(defun char-downcase (char)
- #!+sb-doc
- "Returns CHAR converted to lower-case if that is possible."
- (declare (character char))
- (if (upper-case-p char)
- (code-char (+ (char-code char) 32))
- char))
-
-(defun digit-char (weight &optional (radix 10))
- #!+sb-doc
- "All arguments must be integers. Returns a character object that
- represents a digit of the given weight in the specified radix. Returns
- NIL if no such character exists. The character will have the specified
- font attributes."
- (declare (type (integer 2 36) radix) (type unsigned-byte weight))
- (and (typep weight 'fixnum)
- (>= weight 0) (< weight radix) (< weight 36)
- (code-char (if (< weight 10) (+ 48 weight) (+ 55 weight)))))
projects / sbcl.git / blobdiff