From: morioka <morioka>
Date: Fri, 4 Jun 1999 08:38:26 +0000 (+0000)
Subject: Split off features about coding-system from poem-om.el.
X-Git-Tag: apel-9_20~43
X-Git-Url: http://git.chise.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=048cfece135da53f2462fc9ed4e58366f2f80f33;p=elisp%2Fapel.git

Split off features about coding-system from poem-om.el.
---

diff --git a/pces-om.el b/pces-om.el
new file mode 100644
index 0000000..72c8a99
--- /dev/null
+++ b/pces-om.el
@@ -0,0 +1,307 @@
+;;; pces-om.el --- pces implementation for Mule 1.* and Mule 2.*
+
+;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <tomo@m17n.org>
+;;         Katsumi Yamaoka  <yamaoka@jpl.org>
+;; Keywords: emulation, compatibility, Mule
+
+;; This file is part of APEL (A Portable Emacs Library).
+
+;; This program 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.
+
+;; This program 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 GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'poe)
+
+
+;;; @ version specific features
+;;;
+
+(cond ((= emacs-major-version 19)
+       (define-ccl-program poem-ccl-decode-raw-text
+	 '(1
+	   ((r2 = 0)
+	    (read r0)
+	    (loop
+	      (if (r0 == ?\x0d)
+		  ((r2 = 1)
+		   (read-if (r1 == ?\x0a)
+			    ((r0 = ?\x0a)
+			     (r2 = 0)
+			     (write-read-repeat r0))
+			    ((write r0)
+			     (r0 = (r1 + 0))
+			     (repeat))))
+		((r2 = 0)
+		 (write-read-repeat r0)))))
+	   ;; This EOF BLOCK won't work out in practice. So the last datum
+	   ;; might be lost if it's value is ?\x0d.
+	   (if r2
+	       (write r0))
+	   )
+	 "Convert line-break code from CRLF to LF.")
+
+       (define-ccl-program poem-ccl-encode-raw-text
+	 '(1
+	   ((read r0)
+	    (loop (write-read-repeat r0))))
+	 "Pass through without any conversions.")
+
+       (define-ccl-program poem-ccl-encode-raw-text-CRLF
+	 '(2
+	   ((loop
+	      (read-if (r0 == ?\x0a)
+		       (write "\x0d\x0a")
+		       (write r0))
+	      (repeat))))
+	 "Convert line-break code from LF to CRLF.")
+
+       (make-coding-system
+	'raw-text 4 ?=
+	"No conversion"
+	nil
+	(cons poem-ccl-decode-raw-text poem-ccl-encode-raw-text))
+
+       (make-coding-system
+	'raw-text-dos 4 ?=
+	"No conversion"
+	nil
+	(cons poem-ccl-decode-raw-text poem-ccl-encode-raw-text-CRLF))
+       )
+      (t
+       (defun poem-decode-raw-text (from to)
+	 (save-restriction
+	   (narrow-to-region from to)
+	   (goto-char (point-min))
+	   (while (re-search-forward "\r$" nil t)
+	     (replace-match "")
+	     )))
+       (defun poem-encode-raw-text-CRLF (from to)
+	 (save-restriction
+	   (narrow-to-region from to)
+	   (goto-char (point-min))
+	   (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
+	     (replace-match "\\1\r\n")
+	     )))
+
+       (make-coding-system 'raw-text nil ?= "No conversion")
+       (put 'raw-text 'post-read-conversion 'poem-decode-raw-text)
+       
+       (make-coding-system 'raw-text-dos nil ?= "No conversion")
+       (put 'raw-text-dos 'post-read-conversion 'poem-decode-raw-text)
+       (put 'raw-text-dos 'pre-write-conversion 'poem-encode-raw-text-CRLF)
+       ))
+
+
+;;; @ coding system
+;;;
+
+(defun encode-coding-region (start end coding-system)
+  "Encode the text between START and END to CODING-SYSTEM.
+\[EMACS 20 emulating function]"
+  ;; If `coding-system' is nil, do nothing.
+  (code-convert-region start end *internal* coding-system))
+
+(defun decode-coding-region (start end coding-system)
+  "Decode the text between START and END which is encoded in CODING-SYSTEM.
+\[EMACS 20 emulating function]"
+  ;; If `coding-system' is nil, do nothing.
+  (code-convert-region start end coding-system *internal*))
+
+;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
+(defun encode-coding-string (str coding-system)
+  "Encode the STRING to CODING-SYSTEM.
+\[EMACS 20 emulating function]"
+  (if coding-system
+      (code-convert-string str *internal* coding-system)
+    ;;(code-convert-string str *internal* nil) returns nil instead of str.
+    str))
+
+;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
+(defun decode-coding-string (str coding-system)
+  "Decode the string STR which is encoded in CODING-SYSTEM.
+\[EMACS 20 emulating function]"
+  (if coding-system
+      (let ((len (length str))
+	    ret)
+	(while (and (< 0 len)
+		    (null (setq ret
+				(code-convert-string
+				 (substring str 0 len)
+				 coding-system *internal*))))
+	  (setq len (1- len)))
+	(concat ret (substring str len)))
+    str))
+
+(defalias 'detect-coding-region 'code-detect-region)
+
+(defalias 'set-buffer-file-coding-system 'set-file-coding-system)
+
+
+;;; @ with code-conversion
+;;;
+
+(defun insert-file-contents-as-coding-system
+  (coding-system filename &optional visit beg end replace)
+  "Like `insert-file-contents', q.v., but CODING-SYSTEM the first arg will
+be applied to `file-coding-system-for-read'."
+  (let ((file-coding-system-for-read coding-system))
+    (insert-file-contents filename visit beg end replace)))
+
+(cond
+ ((and (>= emacs-major-version 19) (>= emacs-minor-version 29))
+  ;; for MULE 2.3 based on Emacs 19.34.
+  (defun write-region-as-coding-system
+    (coding-system start end filename &optional append visit lockname)
+    "Like `write-region', q.v., but CODING-SYSTEM the first arg will be
+applied to `file-coding-system'."
+    (let ((file-coding-system coding-system)
+	  jka-compr-compression-info-list jam-zcat-filename-list)
+      (write-region start end filename append visit lockname)))
+
+  (defun find-file-noselect-as-coding-system
+    (coding-system filename &optional nowarn rawfile)
+    "Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
+be applied to `file-coding-system-for-read'."
+    (let ((file-coding-system-for-read coding-system))
+      (find-file-noselect filename nowarn rawfile)))
+  )
+ (t
+  ;; for MULE 2.3 based on Emacs 19.28 or MULE 1.*.
+  (defun write-region-as-coding-system
+    (coding-system start end filename &optional append visit lockname)
+    "Like `write-region', q.v., but CODING-SYSTEM the first arg will be
+applied to `file-coding-system'."
+    (let ((file-coding-system coding-system)
+	  jka-compr-compression-info-list jam-zcat-filename-list)
+      (write-region start end filename append visit)))
+
+  (defun find-file-noselect-as-coding-system
+    (coding-system filename &optional nowarn rawfile)
+    "Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
+be applied to `file-coding-system-for-read'."
+    (let ((file-coding-system-for-read coding-system))
+      (find-file-noselect filename nowarn)))
+  ))
+
+(defun save-buffer-as-coding-system (coding-system &optional args)
+  "Like `save-buffer', q.v., but CODING-SYSTEM the first arg will be
+applied to `coding-system-for-write'."
+  (let ((file-coding-system coding-system))
+    (save-buffer args)))
+
+
+;;; @ without code-conversion
+;;;
+
+(make-coding-system 'binary nil ?= "No conversion")
+
+(defmacro as-binary-process (&rest body)
+  (` (let (selective-display	; Disable ^M to nl translation.
+	   ;; Mule
+	   mc-flag
+	   (default-process-coding-system (cons *noconv* *noconv*))
+	   program-coding-system-alist)
+       (,@ body))))
+
+(defmacro as-binary-input-file (&rest body)
+  (` (let (mc-flag
+	   (file-coding-system-for-read *noconv*)
+	   )
+       (,@ body))))
+
+(defmacro as-binary-output-file (&rest body)
+  (` (let (mc-flag
+	   (file-coding-system *noconv*)
+	   )
+       (,@ body))))
+
+(defalias 'set-process-input-coding-system 'set-process-coding-system)
+
+(defun insert-file-contents-as-binary (filename
+				       &optional visit beg end replace)
+  "Like `insert-file-contents', q.v., but don't code and format conversion.
+Like `insert-file-contents-literary', but it allows find-file-hooks,
+automatic uncompression, etc.
+
+Namely this function ensures that only format decoding and character
+code conversion will not take place."
+  (as-binary-input-file
+   ;; Returns list absolute file name and length of data inserted.
+   (insert-file-contents filename visit beg end replace)))
+
+(defun insert-file-contents-as-raw-text (filename
+					 &optional visit beg end replace)
+  "Like `insert-file-contents', q.v., but don't code and format conversion.
+Like `insert-file-contents-literary', but it allows find-file-hooks,
+automatic uncompression, etc.
+Like `insert-file-contents-as-binary', but it converts line-break
+code."
+  ;; Returns list absolute file name and length of data inserted.
+  (insert-file-contents-as-coding-system 'raw-text
+					 filename visit beg end replace))
+
+(defalias 'insert-file-contents-as-raw-text-CRLF
+  'insert-file-contents-as-raw-text)
+
+(defun write-region-as-binary (start end filename
+				     &optional append visit lockname)
+  "Like `write-region', q.v., but don't code conversion."
+  (write-region-as-coding-system 'binary
+				 start end filename append visit lockname))
+
+(defun write-region-as-raw-text-CRLF (start end filename
+					    &optional append visit lockname)
+  "Like `write-region', q.v., but don't code conversion."
+  (write-region-as-coding-system 'raw-text-dos
+				 start end filename append visit lockname))
+
+(defun find-file-noselect-as-binary (filename &optional nowarn rawfile)
+  "Like `find-file-noselect', q.v., but don't code and format conversion."
+  (find-file-noselect-as-coding-system 'binary filename nowarn rawfile))
+
+(defun find-file-noselect-as-raw-text (filename &optional nowarn rawfile)
+  "Like `find-file-noselect', q.v., but it does not code and format
+conversion except for line-break code."
+  (find-file-noselect-as-coding-system 'raw-text filename nowarn rawfile))
+
+(defalias 'find-file-noselect-as-raw-text-CRLF
+  'find-file-noselect-as-raw-text)
+
+(defun save-buffer-as-binary (&optional args)
+  "Like `save-buffer', q.v., but don't encode."
+  (let ((file-coding-system 'binary))
+    (save-buffer args)))
+
+(defun save-buffer-as-raw-text-CRLF (&optional args)
+  "Like `save-buffer', q.v., but save as network representation."
+  (let ((file-coding-system 'raw-text-dos))
+    (save-buffer args)))
+
+(defun open-network-stream-as-binary (name buffer host service)
+  "Like `open-network-stream', q.v., but don't code conversion."
+  (let ((process (open-network-stream name buffer host service)))
+    (set-process-coding-system process *noconv* *noconv*)
+    process))
+
+
+;;; @ end
+;;;
+
+(provide 'pces-om)
+
+;;; pces-om.el ends here