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Examining the result of #'length: `eql', not `=', it's better style & cheaper 2011-03-08 Aidan Kehoe <kehoea@parhasard.net> * buff-menu.el (list-buffers-noselect): * byte-optimize.el (byte-optimize-identity): * byte-optimize.el (byte-optimize-if): * byte-optimize.el (byte-optimize-nth): * byte-optimize.el (byte-optimize-nthcdr): * bytecomp.el (byte-compile-warn-wrong-args): * bytecomp.el (byte-compile-two-args-19->20): * bytecomp.el (byte-compile-list): * bytecomp.el (byte-compile-beginning-of-line): * bytecomp.el (byte-compile-set): * bytecomp.el (byte-compile-set-default): * bytecomp.el (byte-compile-values): * bytecomp.el (byte-compile-values-list): * bytecomp.el (byte-compile-integerp): * bytecomp.el (byte-compile-multiple-value-list-internal): * bytecomp.el (byte-compile-throw): * cl-macs.el (cl-do-arglist): * cl-macs.el (cl-parse-loop-clause): * cl-macs.el (multiple-value-bind): * cl-macs.el (multiple-value-setq): * cl-macs.el (get-setf-method): * cmdloop.el (command-error): * cmdloop.el (y-or-n-p-minibuf): * cmdloop.el (yes-or-no-p-minibuf): * coding.el (unencodable-char-position): * cus-edit.el (custom-face-prompt): * cus-edit.el (custom-buffer-create-internal): * cus-edit.el (widget-face-action): * cus-edit.el (custom-group-value-create): * descr-text.el (describe-char-unicode-data): * dialog-gtk.el (popup-builtin-question-dialog): * dragdrop.el (experimental-dragdrop-drop-log-function): * dragdrop.el (experimental-dragdrop-drop-mime-default): * easymenu.el (easy-menu-add): * easymenu.el (easy-menu-remove): * faces.el (read-face-name): * faces.el (set-face-stipple): * files.el (file-name-non-special): * font.el (font-combine-fonts): * font.el (font-set-face-font): * font.el (font-parse-rgb-components): * font.el (font-rgb-color-p): * font.el (font-color-rgb-components): * gnuserv.el (gnuserv-edit-files): * help.el (key-or-menu-binding): * help.el (function-documentation-1): * help.el (function-documentation): * info.el (info): * isearch-mode.el (isearch-exit): * isearch-mode.el (isearch-edit-string): * isearch-mode.el (isearch-*-char): * isearch-mode.el (isearch-complete1): * ldap.el (ldap-encode-country-string): * ldap.el (ldap-decode-string): * minibuf.el (read-file-name-internal-1): * minibuf.el (read-non-nil-coding-system): * minibuf.el (get-user-response): * mouse.el (drag-window-divider): * mule/ccl.el: * mule/ccl.el (ccl-compile-if): * mule/ccl.el (ccl-compile-break): * mule/ccl.el (ccl-compile-repeat): * mule/ccl.el (ccl-compile-write-repeat): * mule/ccl.el (ccl-compile-call): * mule/ccl.el (ccl-compile-end): * mule/ccl.el (ccl-compile-read-multibyte-character): * mule/ccl.el (ccl-compile-write-multibyte-character): * mule/ccl.el (ccl-compile-translate-character): * mule/ccl.el (ccl-compile-mule-to-unicode): * mule/ccl.el (ccl-compile-unicode-to-mule): * mule/ccl.el (ccl-compile-lookup-integer): * mule/ccl.el (ccl-compile-lookup-character): * mule/ccl.el (ccl-compile-map-multiple): * mule/ccl.el (ccl-compile-map-single): * mule/devan-util.el (devanagari-compose-to-one-glyph): * mule/devan-util.el (devanagari-composition-component): * mule/mule-cmds.el (finish-set-language-environment): * mule/viet-util.el: * mule/viet-util.el (viet-encode-viscii-char): * multicast.el (open-multicast-group): * newcomment.el (comment-quote-nested): * newcomment.el (comment-region): * newcomment.el (comment-dwim): * regexp-opt.el (regexp-opt-group): * replace.el (map-query-replace-regexp): * specifier.el (derive-device-type-from-tag-set): * subr.el (skip-chars-quote): * test-harness.el (test-harness-from-buffer): * test-harness.el (batch-test-emacs): * wid-edit.el (widget-choice-action): * wid-edit.el (widget-symbol-prompt-internal): * wid-edit.el (widget-color-action): * window-xemacs.el (push-window-configuration): * window-xemacs.el (pop-window-configuration): * window.el (quit-window): * x-compose.el (electric-diacritic): It's better style, and cheaper (often one assembler instruction vs. a C funcall in the byte code), to use `eql' instead of `=' when it's clear what numerical type a given result will be. Change much of our code to do this, with the help of a byte-compiler change (not comitted) that looked for calls to #'length (which always returns an integer) in its args.
author Aidan Kehoe <kehoea@parhasard.net>
date Tue, 08 Mar 2011 23:41:52 +0000
parents 257b468bf2ca
children 308d34e9f07d
line wrap: on
line source

;;; mule-coding.el --- Coding-system functions for Mule. -*- coding: iso-2022-7bit; -*-

;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
;; Licensed to the Free Software Foundation.
;; Copyright (C) 1995 Amdahl Corporation.
;; Copyright (C) 1995 Sun Microsystems.
;; Copyright (C) 1997 MORIOKA Tomohiko
;; Copyright (C) 2001 Ben Wing.

;; This file is part of XEmacs.

;; XEmacs is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; XEmacs is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with XEmacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; split off of mule.el and mostly moved to coding.el

;;; Code:

(defun coding-system-force-on-output (coding-system register)
  "Return the 'force-on-output property of CODING-SYSTEM for the specified REGISTER."
  (check-type register integer)
  (coding-system-property
   coding-system
   (case register
     (0 'force-g0-on-output)
     (1 'force-g1-on-output)
     (2 'force-g2-on-output)
     (3 'force-g3-on-output)
     (t (signal 'args-out-of-range (list register 0 3))))))

(defun coding-system-short (coding-system)
  "Return the 'short property of CODING-SYSTEM."
  (coding-system-property coding-system 'short))

(defun coding-system-no-ascii-eol (coding-system)
  "Return the 'no-ascii-eol property of CODING-SYSTEM."
  (coding-system-property coding-system 'no-ascii-eol))

(defun coding-system-no-ascii-cntl (coding-system)
  "Return the 'no-ascii-cntl property of CODING-SYSTEM."
  (coding-system-property coding-system 'no-ascii-cntl))

(defun coding-system-seven (coding-system)
  "Return the 'seven property of CODING-SYSTEM."
  (coding-system-property coding-system 'seven))

(defun coding-system-lock-shift (coding-system)
  "Return the 'lock-shift property of CODING-SYSTEM."
  (coding-system-property coding-system 'lock-shift))

;;(defun coding-system-use-japanese-jisx0201-roman (coding-system)
;;  "Return the 'use-japanese-jisx0201-roman property of CODING-SYSTEM."
;;  (coding-system-property coding-system 'use-japanese-jisx0201-roman))

;;(defun coding-system-use-japanese-jisx0208-1978 (coding-system)
;;  "Return the 'use-japanese-jisx0208-1978 property of CODING-SYSTEM."
;;  (coding-system-property coding-system 'use-japanese-jisx0208-2978))

(defun coding-system-no-iso6429 (coding-system)
  "Return the 'no-iso6429 property of CODING-SYSTEM."
  (coding-system-property coding-system 'no-iso6429))

(defun coding-system-ccl-encode (coding-system)
  "Return the CCL 'encode property of CODING-SYSTEM."
  (coding-system-property coding-system 'encode))

(defun coding-system-ccl-decode (coding-system)
  "Return the CCL 'decode property of CODING-SYSTEM."
  (coding-system-property coding-system 'decode))

(defun coding-system-iso2022-charset (coding-system register)
"Return the charset initially designated to REGISTER in CODING-SYSTEM.
The allowable range of REGISTER is 0 through 3."
  (if (or (< register 0) (> register 3))
      (error 'args-out-of-range "coding-system-charset REGISTER" register 0 3))
  (coding-system-property coding-system (nth register '(charset-g0
							charset-g1
							charset-g2
							charset-g3))))


;;;; Definitions of predefined coding systems

(make-coding-system
 'ctext 'iso2022
 "Compound Text"
 '(charset-g0 ascii
   charset-g1 latin-iso8859-1
   eol-type nil
   safe-charsets t ;; Reasonable
   mnemonic "CText"))

(make-coding-system
 'iso-2022-8bit-ss2 'iso2022
 "ISO-2022 8-bit w/SS2"
 '(charset-g0 ascii
   charset-g1 latin-iso8859-1
   charset-g2 t ;; unspecified but can be used later.
   short t
   safe-charsets (ascii katakana-jisx0201 japanese-jisx0208-1978
                  japanese-jisx0208 japanese-jisx0212 japanese-jisx0213-1
                  japanese-jisx0213-2)
   mnemonic "ISO8/SS"
   documentation "ISO 2022 based 8-bit encoding using SS2 for 96-charset"
   ))

(make-coding-system
 'iso-2022-7bit-ss2 'iso2022
 "ISO-2022 7-bit w/SS2"
 '(charset-g0 ascii
   charset-g2 t ;; unspecified but can be used later.
   seven t
   short t
   safe-charsets t
   mnemonic "ISO7/SS"
   documentation "ISO 2022 based 7-bit encoding using SS2 for 96-charset"
   eol-type nil))

;; (copy-coding-system 'iso-2022-7bit-ss2 'iso-2022-jp-2)
(make-coding-system
 'iso-2022-jp-2 'iso2022
 "ISO-2022-JP-2"
 '(charset-g0 ascii
   charset-g2 t ;; unspecified but can be used later.
   seven t
   short t
   safe-charsets t
   mnemonic "ISO7/SS"
   eol-type nil))

(make-coding-system
 'iso-2022-7bit 'iso2022
 "ISO 2022 7-bit"
 '(charset-g0 ascii
   seven t
   short t
   safe-charsets t
   mnemonic "ISO7"
   documentation "ISO-2022-based 7-bit encoding using only G0"
   ))

;; compatibility for old XEmacsen
(define-coding-system-alias 'iso-2022-7 'iso-2022-7bit)

(make-coding-system
 'iso-2022-8 'iso2022
 "ISO-2022 8-bit"
 '(charset-g0 ascii
   charset-g1 latin-iso8859-1
   short t
   safe-charsets t
   mnemonic "ISO8"
   documentation "ISO-2022 eight-bit coding system.  No single-shift or locking-shift."
   ))

(make-coding-system
 'escape-quoted 'iso2022
 "Escape-Quoted (for .ELC files)"
 '(charset-g0 ascii
   charset-g1 latin-iso8859-1
   eol-type lf
   escape-quoted t
   safe-charsets t
   mnemonic "ESC/Quot"
   documentation "ISO-2022 eight-bit coding system with escape quoting; used for .ELC files."
   ))

(make-coding-system
 'iso-2022-lock 'iso2022
 "ISO-2022 w/locking-shift"
 '(charset-g0 ascii
   charset-g1 t ;; unspecified but can be used later.
   seven t
   lock-shift t
   safe-charsets t
   mnemonic "ISO7/Lock"
   documentation "ISO-2022 coding system using Locking-Shift for 96-charset."
   ))


;; This is used by people writing CCL programs, but is called at runtime.
(defun define-translation-hash-table (symbol table)
  "Define SYMBOL as the name of the hash translation TABLE for use in CCL.

Analogous to `define-translation-table', but updates
`translation-hash-table-vector' and the table is for use in the CCL
`lookup-integer' and `lookup-character' functions."
  (check-argument-type #'symbolp symbol)
  (check-argument-type #'hash-table-p table)
  (let ((len (length translation-hash-table-vector))
	(id 0)
	done)
    (put symbol 'translation-hash-table table)
    (while (not done)
      (if (>= id len)
	  (setq translation-hash-table-vector
		(vconcat translation-hash-table-vector [nil])))
      (let ((slot (aref translation-hash-table-vector id)))
	(if (or (not slot)
		(eq (car slot) symbol))
	    (progn
	      (aset translation-hash-table-vector id (cons symbol table))
	      (setq done t))
	  (setq id (1+ id)))))
    (put symbol 'translation-hash-table-id id)
    id))

;; Ideally this would be in latin.el, but code-init.el uses it.
(make-coding-system
 'iso-8859-1 
 'fixed-width
 "ISO-8859-1 (Latin-1)"
 (eval-when-compile
   `(unicode-map 
     ,(loop
        for i from #x80 to #xff
        collect (list i (int-char i))) ;; Identical to Latin-1.
     mnemonic "Latin 1"
     documentation "The most used encoding of Western Europe and the Americas."
     aliases (iso-latin-1 latin-1))))