1 ;;; poem-om.el --- poem implementation for Mule 1.* and Mule 2.*
3 ;; Copyright (C) 1995-1999 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Katsumi Yamaoka <yamaoka@jpl.org>
7 ;; Keywords: emulation, compatibility, Mule
9 ;; This file is part of APEL (A Portable Emacs Library).
11 ;; This program is free software; you can redistribute it and/or
12 ;; modify it under the terms of the GNU General Public License as
13 ;; published by the Free Software Foundation; either version 2, or (at
14 ;; your option) any later version.
16 ;; This program is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
31 ;;; @ version specific features
34 (cond ((= emacs-major-version 19)
35 ;; Suggested by SASAKI Osamu <osamu@shuugr.bekkoame.or.jp>
36 ;; (cf. [os2-emacs-ja:78])
37 (defun fontset-pixel-size (fontset)
38 (let* ((font (get-font-info
39 (aref (cdr (get-fontset-info fontset)) 0)))
44 (let ((pat (aref font 1)))
45 (if (string-match "-[0-9]+-" pat)
48 pat (1+ (match-beginning 0)) (1- (match-end 0))))
52 (define-ccl-program poem-ccl-decode-raw-text
59 (read-if (r1 == ?\x0a)
62 (write-read-repeat r0))
67 (write-read-repeat r0)))))
68 ;; This EOF BLOCK won't work out in practice. So the last datum
69 ;; might be lost if it's value is ?\x0d.
73 "Convert line-break code from CRLF to LF.")
75 (define-ccl-program poem-ccl-encode-raw-text
78 (loop (write-read-repeat r0))))
79 "Pass through without any conversions.")
81 (define-ccl-program poem-ccl-encode-raw-text-CRLF
84 (read-if (r0 == ?\x0a)
88 "Convert line-break code from LF to CRLF.")
94 (cons poem-ccl-decode-raw-text poem-ccl-encode-raw-text))
100 (cons poem-ccl-decode-raw-text poem-ccl-encode-raw-text-CRLF))
103 (defun poem-decode-raw-text (from to)
105 (narrow-to-region from to)
106 (goto-char (point-min))
107 (while (re-search-forward "\r$" nil t)
110 (defun poem-encode-raw-text-CRLF (from to)
112 (narrow-to-region from to)
113 (goto-char (point-min))
114 (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
115 (replace-match "\\1\r\n")
118 (make-coding-system 'raw-text nil ?= "No conversion")
119 (put 'raw-text 'post-read-conversion 'poem-decode-raw-text)
121 (make-coding-system 'raw-text-dos nil ?= "No conversion")
122 (put 'raw-text-dos 'post-read-conversion 'poem-decode-raw-text)
123 (put 'raw-text-dos 'pre-write-conversion 'poem-encode-raw-text-CRLF)
130 (defalias 'make-char 'make-character)
132 (defalias 'find-non-ascii-charset-string 'find-charset-string)
133 (defalias 'find-non-ascii-charset-region 'find-charset-region)
135 (defalias 'charset-bytes 'char-bytes)
136 (defalias 'charset-description 'char-description)
137 (defalias 'charset-registry 'char-registry)
138 (defalias 'charset-columns 'char-width)
139 (defalias 'charset-direction 'char-direction)
141 (defun charset-chars (charset)
142 "Return the number of characters per dimension of CHARSET."
143 (if (= (logand (nth 2 (character-set charset)) 1) 1)
151 (defun encode-coding-region (start end coding-system)
152 "Encode the text between START and END to CODING-SYSTEM.
153 \[EMACS 20 emulating function]"
154 ;; If `coding-system' is nil, do nothing.
155 (code-convert-region start end *internal* coding-system))
157 (defun decode-coding-region (start end coding-system)
158 "Decode the text between START and END which is encoded in CODING-SYSTEM.
159 \[EMACS 20 emulating function]"
160 ;; If `coding-system' is nil, do nothing.
161 (code-convert-region start end coding-system *internal*))
163 ;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
164 (defun encode-coding-string (str coding-system)
165 "Encode the STRING to CODING-SYSTEM.
166 \[EMACS 20 emulating function]"
168 (code-convert-string str *internal* coding-system)
169 ;;(code-convert-string str *internal* nil) returns nil instead of str.
172 ;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
173 (defun decode-coding-string (str coding-system)
174 "Decode the string STR which is encoded in CODING-SYSTEM.
175 \[EMACS 20 emulating function]"
177 (let ((len (length str))
179 (while (and (< 0 len)
182 (substring str 0 len)
183 coding-system *internal*))))
185 (concat ret (substring str len)))
188 (defalias 'detect-coding-region 'code-detect-region)
190 (defalias 'set-buffer-file-coding-system 'set-file-coding-system)
193 ;;; @ with code-conversion
196 (defun insert-file-contents-as-coding-system
197 (coding-system filename &optional visit beg end replace)
198 "Like `insert-file-contents', q.v., but CODING-SYSTEM the first arg will
199 be applied to `file-coding-system-for-read'."
200 (let ((file-coding-system-for-read coding-system))
201 (insert-file-contents filename visit beg end replace)))
204 ((and (>= emacs-major-version 19) (>= emacs-minor-version 29))
205 ;; for MULE 2.3 based on Emacs 19.34.
206 (defun write-region-as-coding-system
207 (coding-system start end filename &optional append visit lockname)
208 "Like `write-region', q.v., but CODING-SYSTEM the first arg will be
209 applied to `file-coding-system'."
210 (let ((file-coding-system coding-system)
211 jka-compr-compression-info-list jam-zcat-filename-list)
212 (write-region start end filename append visit lockname)))
214 (defun find-file-noselect-as-coding-system
215 (coding-system filename &optional nowarn rawfile)
216 "Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
217 be applied to `file-coding-system-for-read'."
218 (let ((file-coding-system-for-read coding-system))
219 (find-file-noselect filename nowarn rawfile)))
222 ;; for MULE 2.3 based on Emacs 19.28 or MULE 1.*.
223 (defun write-region-as-coding-system
224 (coding-system start end filename &optional append visit lockname)
225 "Like `write-region', q.v., but CODING-SYSTEM the first arg will be
226 applied to `file-coding-system'."
227 (let ((file-coding-system coding-system)
228 jka-compr-compression-info-list jam-zcat-filename-list)
229 (write-region start end filename append visit)))
231 (defun find-file-noselect-as-coding-system
232 (coding-system filename &optional nowarn rawfile)
233 "Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
234 be applied to `file-coding-system-for-read'."
235 (let ((file-coding-system-for-read coding-system))
236 (find-file-noselect filename nowarn)))
239 (defun save-buffer-as-coding-system (coding-system &optional args)
240 "Like `save-buffer', q.v., but CODING-SYSTEM the first arg will be
241 applied to `coding-system-for-write'."
242 (let ((file-coding-system coding-system))
246 ;;; @ without code-conversion
249 (make-coding-system 'binary nil ?= "No conversion")
251 (defmacro as-binary-process (&rest body)
252 (` (let (selective-display ; Disable ^M to nl translation.
255 (default-process-coding-system (cons *noconv* *noconv*))
256 program-coding-system-alist)
259 (defmacro as-binary-input-file (&rest body)
261 (file-coding-system-for-read *noconv*)
265 (defmacro as-binary-output-file (&rest body)
267 (file-coding-system *noconv*)
271 (defalias 'set-process-input-coding-system 'set-process-coding-system)
273 (defun insert-binary-file-contents-literally (filename
274 &optional visit beg end replace)
275 "Like `insert-file-contents-literally', q.v., but don't code conversion.
276 A buffer may be modified in several ways after reading into the buffer due
277 to advanced Emacs features, such as file-name-handlers, format decoding,
278 find-file-hooks, etc.
279 This function ensures that none of these modifications will take place."
280 (as-binary-input-file
281 ;; Returns list absolute file name and length of data inserted.
282 (insert-file-contents-literally filename visit beg end replace)))
284 (defun insert-file-contents-as-binary (filename
285 &optional visit beg end replace)
286 "Like `insert-file-contents', q.v., but don't code and format conversion.
287 Like `insert-file-contents-literary', but it allows find-file-hooks,
288 automatic uncompression, etc.
290 Namely this function ensures that only format decoding and character
291 code conversion will not take place."
292 (as-binary-input-file
293 ;; Returns list absolute file name and length of data inserted.
294 (insert-file-contents filename visit beg end replace)))
296 (defun insert-file-contents-as-raw-text (filename
297 &optional visit beg end replace)
298 "Like `insert-file-contents', q.v., but don't code and format conversion.
299 Like `insert-file-contents-literary', but it allows find-file-hooks,
300 automatic uncompression, etc.
301 Like `insert-file-contents-as-binary', but it converts line-break
303 ;; Returns list absolute file name and length of data inserted.
304 (insert-file-contents-as-coding-system 'raw-text
305 filename visit beg end replace))
307 (defun write-region-as-binary (start end filename
308 &optional append visit lockname)
309 "Like `write-region', q.v., but don't code conversion."
310 (write-region-as-coding-system 'binary
311 start end filename append visit lockname))
313 (defun write-region-as-raw-text-CRLF (start end filename
314 &optional append visit lockname)
315 "Like `write-region', q.v., but don't code conversion."
316 (write-region-as-coding-system 'raw-text-dos
317 start end filename append visit lockname))
319 (defun find-file-noselect-as-binary (filename &optional nowarn rawfile)
320 "Like `find-file-noselect', q.v., but don't code and format conversion."
321 (find-file-noselect-as-coding-system 'binary filename nowarn rawfile))
323 (defun find-file-noselect-as-raw-text (filename &optional nowarn rawfile)
324 "Like `find-file-noselect', q.v., but it does not code and format
325 conversion except for line-break code."
326 (find-file-noselect-as-coding-system 'raw-text filename nowarn rawfile))
328 (defun save-buffer-as-binary (&optional args)
329 "Like `save-buffer', q.v., but don't encode."
330 (let ((file-coding-system 'binary))
333 (defun save-buffer-as-raw-text-CRLF (&optional args)
334 "Like `save-buffer', q.v., but save as network representation."
335 (let ((file-coding-system 'raw-text-dos))
338 (defun open-network-stream-as-binary (name buffer host service)
339 "Like `open-network-stream', q.v., but don't code conversion."
340 (let ((process (open-network-stream name buffer host service)))
341 (set-process-coding-system process *noconv* *noconv*)
345 ;;; @ buffer representation
348 (defsubst-maybe set-buffer-multibyte (flag)
349 "Set the multibyte flag of the current buffer to FLAG.
350 If FLAG is t, this makes the buffer a multibyte buffer.
351 If FLAG is nil, this makes the buffer a single-byte buffer.
352 The buffer contents remain unchanged as a sequence of bytes
353 but the contents viewed as characters do change.
354 \[Emacs 20.3 emulating function]"
362 (defalias 'char-charset 'char-leading-char)
364 (defun split-char (character)
365 "Return list of charset and one or two position-codes of CHARACTER."
366 (let ((p (1- (char-bytes character)))
369 (setq dest (cons (- (char-component character p) 128) dest)
371 (cons (char-charset character) dest)))
373 (defmacro char-next-index (char index)
374 "Return index of character succeeding CHAR whose index is INDEX."
375 (` (+ (, index) (char-bytes (, char)))))
377 (if (subr-fboundp 'char-before)
381 (when (and (eq (car (get (car err) 'error-conditions))
382 'wrong-number-of-arguments)
383 (not (boundp 'si:char-before)))
384 (fset 'si:char-before (symbol-function 'char-before))
385 (defun char-before (&optional pos)
386 "Return character in current buffer preceding position POS.
387 POS is an integer or a buffer pointer.
388 If POS is out of range, the value is nil."
389 (si:char-before (or pos (point)))
392 (if (subr-fboundp 'char-after)
396 (when (and (eq (car (get (car err) 'error-conditions))
397 'wrong-number-of-arguments)
398 (not (boundp 'si:char-after)))
399 (fset 'si:char-after (symbol-function 'char-after))
400 (defun char-after (&optional pos)
401 "Return character in current buffer at position POS.
402 POS is an integer or a buffer pointer.
403 If POS is out of range, the value is nil."
404 (si:char-after (or pos (point)))
407 ;;; @@ obsoleted aliases
409 ;;; You should not use them.
411 (defalias 'char-length 'char-bytes)
412 ;;(defalias 'char-columns 'char-width)
418 (defalias 'string-columns 'string-width)
420 (defalias 'string-to-int-list 'string-to-char-list)
422 ;; Imported from Mule-2.3
423 (defun-maybe truncate-string (str width &optional start-column)
425 Truncate STR to fit in WIDTH columns.
426 Optional non-nil arg START-COLUMN specifies the starting column.
427 \[emu-mule.el; Mule 2.3 emulating function]"
429 (setq start-column 0))
430 (let ((max-width (string-width str))
435 (if (>= width max-width)
436 (setq width max-width))
437 (if (>= start-column width)
439 (while (< column start-column)
440 (setq ch (aref str from)
441 column (+ column (char-width ch))
442 from (+ from (char-bytes ch))))
443 (if (< width max-width)
446 (while (<= column width)
447 (setq ch (aref str to)
448 column (+ column (char-width ch))
450 to (+ to (char-bytes ch))))
452 (substring str from to))))
454 (defalias 'looking-at-as-unibyte 'looking-at)
462 ;;; poem-om.el ends here