New file for file coding based XEmacs. [by Andy Piper <andy@xemacs.org>]

diff --git a/poem-xfc.el b/poem-xfc.el
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+;;; poem-xfc.el --- poem module for XEmacs with file coding; -*-byte-compile-dynamic: t;-*-
+
+;; Copyright (C) 1998 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; 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:
+
+(eval-when-compile
+  (require 'poe))
+(require 'poem-20)
+
+
+;;; @ fix coding-system definition
+;;;
+
+;; Redefine if -{dos|mac|unix} is not found.
+(or (find-coding-system 'raw-text-dos)
+    (copy-coding-system 'no-conversion-dos 'raw-text-dos))
+(or (find-coding-system 'raw-text-mac)
+    (copy-coding-system 'no-conversion-mac 'raw-text-mac))
+(or (find-coding-system 'raw-text-unix)
+    (copy-coding-system 'no-conversion-unix 'raw-text-unix))
+
+;;; @ without code-conversion
+;;;
+
+(defun insert-file-contents-as-binary (filename
+                                      &optional visit beg end replace)
+  "Like `insert-file-contents', but only reads in the file literally.
+A buffer may be modified in several ways after reading into the buffer,
+to Emacs features such as format decoding, character code
+conversion, find-file-hooks, automatic uncompression, etc.
+
+This function ensures that none of these modifications will take place."
+  (let ((format-alist nil)
+       (after-insert-file-functions nil)
+       (coding-system-for-read 'binary)
+       (coding-system-for-write 'binary)
+       (jka-compr-compression-info-list nil)
+       (jam-zcat-filename-list nil)
+       (find-buffer-file-type-function
+        (if (fboundp 'find-buffer-file-type)
+            (symbol-function 'find-buffer-file-type)
+          nil)))
+    (unwind-protect
+       (progn
+         (fset 'find-buffer-file-type (lambda (filename) t))
+         (insert-file-contents filename visit beg end replace))
+      (if find-buffer-file-type-function
+         (fset 'find-buffer-file-type find-buffer-file-type-function)
+       (fmakunbound 'find-buffer-file-type)))))
+
+
+;;; @ buffer representation
+;;;
+
+(defsubst-maybe set-buffer-multibyte (flag)
+  "Set the multibyte flag of the current buffer to FLAG.
+If FLAG is t, this makes the buffer a multibyte buffer.
+If FLAG is nil, this makes the buffer a single-byte buffer.
+The buffer contents remain unchanged as a sequence of bytes
+but the contents viewed as characters do change.
+\[Emacs 20.3 emulating function]"
+  flag)
+
+;;; @ character set
+;;;
+
+(put 'ascii 'charset-description "Character set of ASCII")
+(put 'ascii 'charset-registry "ASCII")
+
+(put 'latin-iso8859-1 'charset-description "Character set of ISO-8859-1")
+(put 'latin-iso8859-1 'charset-registry "ISO8859-1")
+
+(defun charset-description (charset)
+  "Return description of CHARSET."
+  (get charset 'charset-description))
+
+(defun charset-registry (charset)
+  "Return registry name of CHARSET."
+  (get charset 'charset-registry))
+
+(defun charset-width (charset)
+  "Return number of columns a CHARSET occupies when displayed."
+  1)
+
+(defun charset-direction (charset)
+  "Return the direction of a character of CHARSET by
+  0 (left-to-right) or 1 (right-to-left)."
+  0)
+
+(defun find-charset-string (str)
+  "Return a list of charsets in the string."
+  (if (string-match "[\200-\377]" str)
+      '(latin-iso8859-1)
+    ))
+
+(defalias 'find-non-ascii-charset-string 'find-charset-string)
+
+(defun find-charset-region (start end)
+  "Return a list of charsets in the region between START and END."
+  (if (save-excursion
+       (goto-char start)
+       (re-search-forward "[\200-\377]" end t))
+      '(latin-iso8859-1)
+    ))
+
+(defalias 'find-non-ascii-charset-region 'find-charset-region)
+
+;;; @ string
+;;;
+
+(defun-maybe string-to-int-list (str)
+  (mapcar #'char-int str))
+
+(defalias 'looking-at-as-unibyte 'looking-at)
+
+
+;;; @ end
+;;;
+
+(provide 'poem-xfc)
+
+;;; poem-xfc.el ends here