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1 ;;; emu-e19.el --- emu module for Emacs 19 and XEmacs 19
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2
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3 ;; Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
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4
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5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
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6 ;; Version: $Id: emu-e19.el,v 1.1 1997/06/03 04:18:35 steve Exp $
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7 ;; Keywords: emulation, compatibility, mule, Latin-1
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8
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9 ;; This file is part of emu.
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10
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11 ;; This program is free software; you can redistribute it and/or
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12 ;; modify it under the terms of the GNU General Public License as
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13 ;; published by the Free Software Foundation; either version 2, or (at
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14 ;; your option) any later version.
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15
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16 ;; This program is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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24 ;; Boston, MA 02111-1307, USA.
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25
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26 ;;; Code:
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27
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28 ;;; @ version and variant specific features
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29 ;;;
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30
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31 (cond (running-xemacs
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32 (require 'emu-xemacs))
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33 (running-emacs-19
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34 (require 'emu-19)
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35 ))
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36
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37
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38 ;;; @ character set
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39 ;;;
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40
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41 (defconst charset-ascii 0 "Character set of ASCII")
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42 (defconst charset-latin-iso8859-1 129 "Character set of ISO-8859-1")
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43
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44 (defun charset-description (charset)
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45 "Return description of CHARSET. [emu-e19.el]"
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46 (if (< charset 128)
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47 (documentation-property 'charset-ascii 'variable-documentation)
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48 (documentation-property 'charset-latin-iso8859-1 'variable-documentation)
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49 ))
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50
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51 (defun charset-registry (charset)
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52 "Return registry name of CHARSET. [emu-e19.el]"
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53 (if (< charset 128)
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54 "ASCII"
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55 "ISO8859-1"))
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56
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57 (defun charset-columns (charset)
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58 "Return number of columns a CHARSET occupies when displayed.
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59 \[emu-e19.el]"
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60 1)
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61
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62 (defun charset-direction (charset)
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63 "Return the direction of a character of CHARSET by
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64 0 (left-to-right) or 1 (right-to-left). [emu-e19.el]"
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65 0)
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66
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67 (defun find-charset-string (str)
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68 "Return a list of charsets in the string.
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69 \[emu-e19.el; Mule emulating function]"
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70 (if (string-match "[\200-\377]" str)
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71 (list charset-latin-iso8859-1)
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72 ))
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73
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74 (defalias 'find-non-ascii-charset-string 'find-charset-string)
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75
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76 (defun find-charset-region (start end)
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77 "Return a list of charsets in the region between START and END.
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78 \[emu-e19.el; Mule emulating function]"
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79 (if (save-excursion
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80 (save-restriction
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81 (narrow-to-region start end)
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82 (goto-char start)
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83 (re-search-forward "[\200-\377]" nil t)
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84 ))
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85 (list charset-latin-iso8859-1)
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86 ))
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87
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88 (defalias 'find-non-ascii-charset-region 'find-charset-region)
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89
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90
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91 ;;; @ coding-system
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92 ;;;
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93
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94 (defconst *internal* nil)
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95 (defconst *ctext* nil)
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96 (defconst *noconv* nil)
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97
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98 (defun decode-coding-string (string coding-system)
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99 "Decode the STRING which is encoded in CODING-SYSTEM.
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100 \[emu-e19.el; Emacs 20 emulating function]"
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101 string)
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102
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103 (defun encode-coding-string (string coding-system)
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104 "Encode the STRING as CODING-SYSTEM.
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105 \[emu-e19.el; Emacs 20 emulating function]"
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106 string)
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107
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108 (defun decode-coding-region (start end coding-system)
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109 "Decode the text between START and END which is encoded in CODING-SYSTEM.
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110 \[emu-e19.el; Emacs 20 emulating function]"
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111 0)
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112
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113 (defun encode-coding-region (start end coding-system)
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114 "Encode the text between START and END to CODING-SYSTEM.
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115 \[emu-e19.el; Emacs 20 emulating function]"
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116 0)
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117
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118 (defun detect-coding-region (start end)
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119 "Detect coding-system of the text in the region between START and END.
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120 \[emu-e19.el; Emacs 20 emulating function]"
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121 )
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122
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123 (defun set-buffer-file-coding-system (coding-system &optional force)
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124 "Set buffer-file-coding-system of the current buffer to CODING-SYSTEM.
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125 \[emu-e19.el; Emacs 20 emulating function]"
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126 )
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127
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128 (defmacro as-binary-process (&rest body)
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129 (` (let (selective-display) ; Disable ^M to nl translation.
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130 (,@ body)
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131 )))
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132
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133 (defmacro as-binary-input-file (&rest body)
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134 (` (let ((emx-binary-mode t)) ; Stop CRLF to LF conversion in OS/2
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135 (,@ body)
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136 )))
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137
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138 (defmacro as-binary-output-file (&rest body)
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139 (` (let ((emx-binary-mode t)) ; Stop CRLF to LF conversion in OS/2
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140 (,@ body)
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141 )))
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142
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143
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144 ;;; @@ for old MULE emulation
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145 ;;;
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146
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147 (defun code-convert-string (str ic oc)
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148 "Convert code in STRING from SOURCE code to TARGET code,
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149 On successful converion, returns the result string,
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150 else returns nil. [emu-e19.el; old MULE emulating function]"
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151 str)
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152
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153 (defun code-convert-region (beg end ic oc)
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154 "Convert code of the text between BEGIN and END from SOURCE
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155 to TARGET. On successful conversion returns t,
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156 else returns nil. [emu-e19.el; old MULE emulating function]"
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157 t)
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158
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159
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160 ;;; @ binary access
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161 ;;;
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162
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163 (defun insert-binary-file-contents-literally
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164 (filename &optional visit beg end replace)
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165 "Like `insert-file-contents-literally', q.v., but don't code conversion.
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166 A buffer may be modified in several ways after reading into the buffer due
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167 to advanced Emacs features, such as file-name-handlers, format decoding,
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168 find-file-hooks, etc.
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169 This function ensures that none of these modifications will take place."
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170 (let ((emx-binary-mode t))
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171 (insert-file-contents-literally filename visit beg end replace)
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172 ))
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173
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174
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175 ;;; @ MIME charset
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176 ;;;
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177
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178 (defvar charsets-mime-charset-alist
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179 (list (cons (list charset-ascii) 'us-ascii)))
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180
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181 (defvar default-mime-charset 'iso-8859-1)
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182
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183 (defun mime-charset-to-coding-system (charset)
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184 (if (stringp charset)
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185 (setq charset (intern (downcase charset)))
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186 )
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187 (and (memq charset (list 'us-ascii default-mime-charset))
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188 charset)
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189 )
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190
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191 (defun detect-mime-charset-region (start end)
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192 "Return MIME charset for region between START and END.
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193 \[emu-e19.el]"
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194 (if (save-excursion
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195 (save-restriction
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196 (narrow-to-region start end)
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197 (goto-char start)
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198 (re-search-forward "[\200-\377]" nil t)
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199 ))
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200 default-mime-charset
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201 'us-ascii))
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202
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203 (defun encode-mime-charset-region (start end charset)
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204 "Encode the text between START and END as MIME CHARSET.
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205 \[emu-e19.el]"
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206 )
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207
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208 (defun decode-mime-charset-region (start end charset)
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209 "Decode the text between START and END as MIME CHARSET.
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210 \[emu-e19.el]"
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211 )
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212
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213 (defun encode-mime-charset-string (string charset)
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214 "Encode the STRING as MIME CHARSET. [emu-e19.el]"
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215 string)
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216
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217 (defun decode-mime-charset-string (string charset)
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218 "Decode the STRING as MIME CHARSET. [emu-e19.el]"
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219 string)
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220
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221
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222 ;;; @ character
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223 ;;;
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224
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225 (defun char-charset (chr)
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226 "Return the character set of char CHR.
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227 \[emu-e19.el; XEmacs 20 emulating function]"
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228 (if (< chr 128)
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229 charset-ascii
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230 charset-latin-iso8859-1))
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231
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232 (defun char-bytes (char)
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233 "Return number of bytes a character in CHAR occupies in a buffer.
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234 \[emu-e19.el; MULE emulating function]"
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235 1)
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236
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237 (defalias 'char-length 'char-bytes)
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238
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239 (defun char-columns (character)
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240 "Return number of columns a CHARACTER occupies when displayed.
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241 \[emu-e19.el]"
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242 1)
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243
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244 ;;; @@ for old MULE emulation
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245 ;;;
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246
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247 (defalias 'char-width 'char-columns)
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248
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249 (defalias 'char-leading-char 'char-charset)
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250
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251
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252 ;;; @ string
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253 ;;;
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254
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255 (defalias 'string-columns 'length)
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256
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257 (defun string-to-char-list (str)
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258 (mapcar (function identity) str)
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259 )
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260
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261 (defalias 'string-to-int-list 'string-to-char-list)
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262
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263 (defalias 'sref 'aref)
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264
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265 (defun truncate-string (str width &optional start-column)
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266 "Truncate STR to fit in WIDTH columns.
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267 Optional non-nil arg START-COLUMN specifies the starting column.
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268 \[emu-e19.el; MULE 2.3 emulating function]"
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269 (or start-column
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270 (setq start-column 0))
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271 (substring str start-column width)
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272 )
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273
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274 ;;; @@ for old MULE emulation
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275 ;;;
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276
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277 (defalias 'string-width 'length)
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278
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279
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280 ;;; @ end
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281 ;;;
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282
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283 (provide 'emu-e19)
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284
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285 ;;; emu-e19.el ends here
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