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poem-ltn1.el
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poem-ltn1.el
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;;; poem-ltn1.el --- poem implementation for Emacs 19 and XEmacs without MULE
;; 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:
;;; @ buffer representation
;;;
(eval-when-compile
(require 'poe))
(defun-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 macro]"
)
;;; @ 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)
;;; @ character
;;;
(defun char-charset (char)
"Return the character set of char CHAR."
(if (< char 128)
'ascii
'latin-iso8859-1))
(defun char-bytes (char)
"Return number of bytes a character in CHAR occupies in a buffer."
1)
(defun char-width (char)
"Return number of columns a CHAR occupies when displayed."
1)
(defun split-char (character)
"Return list of charset and one or two position-codes of CHARACTER."
(cons (char-charset character) character))
(defalias 'char-length 'char-bytes)
(defmacro char-next-index (char index)
"Return index of character succeeding CHAR whose index is INDEX."
(` (1+ (, index))))
;;; @ string
;;;
(defalias 'string-width 'length)
(defun string-to-char-list (str)
(mapcar (function identity) str))
(defalias 'string-to-int-list 'string-to-char-list)
(defalias 'sref 'aref)
(defun truncate-string (str width &optional start-column)
"Truncate STR to fit in WIDTH columns.
Optional non-nil arg START-COLUMN specifies the starting column.
\[emu-latin1.el; MULE 2.3 emulating function]"
(or start-column
(setq start-column 0))
(if (> (length str) width)
(substring str start-column width)
str))
(defalias 'looking-at-as-unibyte 'looking-at)
;;; @@ obsoleted aliases
;;;
;;; You should not use them.
(defalias 'string-columns 'length)
(make-obsolete 'string-columns 'string-width)
;;; @ end
;;;
(require 'product)
(product-provide (provide 'poem-ltn1) (require 'apel-ver))
;;; poem-ltn1.el ends here