Split off features about coding-system from poem-ltn1.el.

diff --git a/pces-raw.el b/pces-raw.el
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+++ b/pces-raw.el
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+;;; pces-raw.el --- pces submodule for emacsen without coding-system features
+
+;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <tomo@m17n.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:
+
+;;; @ coding-system
+;;;
+
+(defun decode-coding-string (string coding-system)
+  "Decode the STRING which is encoded in CODING-SYSTEM."
+  string)
+
+(defun encode-coding-string (string coding-system)
+  "Encode the STRING as CODING-SYSTEM."
+  string)
+
+(defun decode-coding-region (start end coding-system)
+  "Decode the text between START and END which is encoded in CODING-SYSTEM."
+  0)
+
+(defun encode-coding-region (start end coding-system)
+  "Encode the text between START and END to CODING-SYSTEM."
+  0)
+
+(defun detect-coding-region (start end)
+  "Detect coding-system of the text in the region between START and END."
+  )
+
+(defun set-buffer-file-coding-system (coding-system &optional force)
+  "Set buffer-file-coding-system of the current buffer to CODING-SYSTEM."
+  )
+
+
+;;; @ without code-conversion
+;;;
+
+(defmacro as-binary-process (&rest body)
+  (` (let (selective-display)  ; Disable ^M to nl translation.
+       (,@ body))))
+
+(defmacro as-binary-input-file (&rest body)
+  (` (let ((emx-binary-mode t)) ; Stop CRLF to LF conversion in OS/2
+       (,@ body))))
+
+(defmacro as-binary-output-file (&rest body)
+  (` (let ((emx-binary-mode t)) ; Stop CRLF to LF conversion in OS/2
+       (,@ body))))
+
+(defun write-region-as-binary (start end filename
+                                    &optional append visit lockname)
+  "Like `write-region', q.v., but don't code conversion."
+  (let ((emx-binary-mode t))
+    (write-region start end filename append visit lockname)))
+
+(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."
+  (let ((emx-binary-mode t))
+    ;; Returns list of absolute file name and length of data inserted.
+    (insert-file-contents filename visit beg end replace)))
+
+(defun write-region-as-raw-text-CRLF (start end filename
+                                           &optional append visit lockname)
+  "Like `write-region', q.v., but write as network representation."
+  (let ((the-buf (current-buffer)))
+    (with-temp-buffer
+      (insert-buffer-substring the-buf start end)
+      (goto-char (point-min))
+      (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
+       (replace-match "\\1\r\n"))
+      (write-region (point-min)(point-max) filename append visit lockname))))
+
+(defalias 'insert-file-contents-as-raw-text 'insert-file-contents)
+
+(defalias 'insert-file-contents-as-raw-text-CRLF 'insert-file-contents)
+
+(defun find-file-noselect-as-binary (filename &optional nowarn rawfile)
+  "Like `find-file-noselect', q.v., but don't code and format conversion."
+  (let ((emx-binary-mode t))
+    (find-file-noselect filename nowarn rawfile)))
+
+(defalias 'find-file-noselect-as-raw-text 'find-file-noselect)
+
+(defalias 'find-file-noselect-as-raw-text-CRLF 'find-file-noselect)
+
+(defun save-buffer-as-binary (&optional args)
+  "Like `save-buffer', q.v., but don't encode."
+  (let ((emx-binary-mode t))
+    (save-buffer args)))
+
+(defun save-buffer-as-raw-text-CRLF (&optional args)
+  "Like `save-buffer', q.v., but save as network representation."
+  (if (buffer-modified-p)
+      (save-restriction
+       (widen)
+       (let ((the-buf (current-buffer))
+             (filename (buffer-file-name)))
+         (if filename
+             (prog1
+                 (with-temp-buffer
+                   (insert-buffer the-buf)
+                   (goto-char (point-min))
+                   (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
+                     (replace-match "\\1\r\n"))
+                   (setq buffer-file-name filename)
+                   (save-buffer args))
+               (set-buffer-modified-p nil)
+               (clear-visited-file-modtime)))))))
+
+(defun open-network-stream-as-binary (name buffer host service)
+  "Like `open-network-stream', q.v., but don't code conversion."
+  (let ((emx-binary-mode t))
+    (open-network-stream name buffer host service)))
+
+
+;;; @ with code-conversion (but actually it might be not done)
+;;;
+
+(defun insert-file-contents-as-coding-system
+  (coding-system filename &optional visit beg end replace)
+  "Like `insert-file-contents', q.v., but CODING-SYSTEM is used to decode."
+  (insert-file-contents filename visit beg end replace))
+
+(defun write-region-as-coding-system
+  (coding-system start end filename &optional append visit lockname)
+  "Like `write-region', q.v., but CODING-SYSTEM is used to encode."
+  (let (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., CODING-SYSTEM is used to decode."
+  (find-file-noselect filename nowarn rawfile))
+
+(defun save-buffer-as-coding-system (coding-system &optional args)
+  "Like `save-buffer', q.v., CODING-SYSTEM is used to encode."
+  (save-buffer args))
+
+
+;;; @ end
+;;;
+
+(provide 'pces-raw)
+
+;;; pces-raw.el ends here