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70
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1 ;;; mule-coding.el --- Coding-system functions for Mule.
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2
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3 ;; Copyright (C) 1992,93,94,95 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Amdahl Corporation.
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5 ;; Copyright (C) 1995 Sun Microsystems.
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software; you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; XEmacs is distributed in the hope that it will be useful, but
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15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ;; General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs; see the file COPYING. If not, write to the
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21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 ;; Boston, MA 02111-1307, USA.
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23
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24 ;;; Commentary:
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25
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26 ;;; split off of mule.el.
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27
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28 ;;; Code:
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29
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30 (defun set-terminal-coding-system (coding-system)
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31 "Set the coding system used for TTY display output."
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32 (interactive "zterminal-coding-system: ")
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33 (get-coding-system coding-system) ;; correctness check
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34 (setq terminal-coding-system coding-system)
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35 (redraw-modeline t))
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36
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37 (defun set-pathname-coding-system (coding-system)
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38 "Set the coding system used for file system path names."
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39 (interactive "zPathname-coding-system: ")
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40 (get-coding-system coding-system) ;; correctness check
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41 (setq pathname-coding-system coding-system))
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42
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43 (defun what-coding-system (start end &optional arg)
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44 "Show the encoding of text in the region.
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45 With prefix arg, show all possible coding systems.
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46 This function is meant to be called interactively;
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47 from a Lisp program, use `detect-coding-region' instead."
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48 (interactive "r\nP")
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49 (let ((codings (detect-coding-region start end)))
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50 (message "%s" (if (or arg (symbolp codings)) codings (car codings)))))
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51
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52 (defmacro with-string-as-buffer-contents (str &rest body)
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53 "With the contents of the current buffer being STR, run BODY.
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54 Returns the new contents of the buffer, as modified by BODY.
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55 The original current buffer is restored afterwards."
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56 `(let ((curbuf (current-buffer))
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57 (tempbuf (get-buffer-create " *string-as-buffer-contents*")))
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58 (unwind-protect
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59 (progn
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60 (set-buffer tempbuf)
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61 (buffer-disable-undo (current-buffer))
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62 (erase-buffer)
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63 (insert ,str)
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64 ,@body
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65 (buffer-string))
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66 (erase-buffer tempbuf)
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67 (set-buffer curbuf))))
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68
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69 (defun decode-coding-string (str coding-system)
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70 "Decode the string STR which is encoded in CODING-SYSTEM.
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71 Does not modify STR. Returns the decoded string on successful conversion."
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72 (with-string-as-buffer-contents
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73 str (decode-coding-region (point-min) (point-max) coding-system)))
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74
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75 (defun encode-coding-string (str coding-system)
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76 "Encode the string STR using CODING-SYSTEM.
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77 Does not modify STR. Returns the encoded string on successful conversion."
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78 (with-string-as-buffer-contents
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79 str (encode-coding-region (point-min) (point-max) coding-system)))
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80
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81
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82 ;;;; Coding system accessors
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83
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84 (defun coding-system-mnemonic (coding-system)
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85 "Return the 'mnemonic property of CODING-SYSTEM."
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86 (coding-system-property coding-system 'mnemonic))
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87
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88 (defun coding-system-eol-type (coding-system)
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89 "Return the 'eol-type property of CODING-SYSTEM."
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90 (coding-system-property coding-system 'eol-type))
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91
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92 (defun coding-system-eol-lf (coding-system)
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93 "Return the 'eol-lf property of CODING-SYSTEM."
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94 (coding-system-property coding-system 'eol-lf))
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95
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96 (defun coding-system-eol-crlf (coding-system)
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97 "Return the 'eol-crlf property of CODING-SYSTEM."
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98 (coding-system-property coding-system 'eol-crlf))
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99
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100 (defun coding-system-eol-cr (coding-system)
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101 "Return the 'eol-cr property of CODING-SYSTEM."
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102 (coding-system-property coding-system 'eol-cr))
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103
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104 (defun coding-system-post-read-conversion (coding-system)
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105 "Return the 'post-read-conversion property of CODING-SYSTEM."
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106 (coding-system-property coding-system 'post-read-conversion))
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107
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108 (defun coding-system-pre-write-conversion (coding-system)
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109 "Return the 'pre-write-conversion property of CODING-SYSTEM."
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110 (coding-system-property coding-system 'pre-write-conversion))
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111
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112 (defun coding-system-charset (coding-system register)
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113 "Return the 'charset property of CODING-SYSTEM for the specified REGISTER."
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114 (cond ((not (integerp register))
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115 (signal 'wrong-type-argument (list 'integerp register)))
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116 ((= register 0)
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117 (coding-system-property coding-system 'charset-g0))
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118 ((= register 1)
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119 (coding-system-property coding-system 'charset-g1))
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120 ((= register 2)
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121 (coding-system-property coding-system 'charset-g2))
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122 ((= register 3)
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123 (coding-system-property coding-system 'charset-g3))
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124 (t
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125 (signal 'args-out-of-range (list register 0 3)))))
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126
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127 (defun coding-system-force-on-output (coding-system register)
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128 "Return the 'force-on-output property of CODING-SYSTEM for the specified REGISTER."
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129 (cond ((not (integerp register))
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130 (signal 'wrong-type-argument (list 'integerp register)))
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131 ((= register 0)
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132 (coding-system-property coding-system 'force-g0-on-output))
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133 ((= register 1)
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134 (coding-system-property coding-system 'force-g1-on-output))
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135 ((= register 2)
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136 (coding-system-property coding-system 'force-g2-on-output))
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137 ((= register 3)
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138 (coding-system-property coding-system 'force-g3-on-output))
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139 (t
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140 (signal 'args-out-of-range (list register 0 3)))))
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141
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142 (defun coding-system-short (coding-system)
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143 "Return the 'short property of CODING-SYSTEM."
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144 (coding-system-property coding-system 'short))
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145
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146 (defun coding-system-no-ascii-eol (coding-system)
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147 "Return the 'no-ascii-eol property of CODING-SYSTEM."
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148 (coding-system-property coding-system 'no-ascii-eol))
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149
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150 (defun coding-system-no-ascii-cntl (coding-system)
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151 "Return the 'no-ascii-cntl property of CODING-SYSTEM."
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152 (coding-system-property coding-system 'no-ascii-cntl))
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153
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154 (defun coding-system-seven (coding-system)
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155 "Return the 'seven property of CODING-SYSTEM."
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156 (coding-system-property coding-system 'seven))
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157
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158 (defun coding-system-lock-shift (coding-system)
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159 "Return the 'lock-shift property of CODING-SYSTEM."
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160 (coding-system-property coding-system 'lock-shift))
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161
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162 (defun coding-system-use-japanese-jisx0201-roman (coding-system)
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163 "Return the 'use-japanese-jisx0201-roman property of CODING-SYSTEM."
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164 (coding-system-property coding-system 'use-japanese-jisx0201-roman))
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165
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166 (defun coding-system-use-japanese-jisx0208-1978 (coding-system)
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167 "Return the 'use-japanese-jisx0208-1978 property of CODING-SYSTEM."
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168 (coding-system-property coding-system 'use-japanese-jisx0208-2978))
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169
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170 (defun coding-system-no-iso6429 (coding-system)
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171 "Return the 'no-iso6429 property of CODING-SYSTEM."
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172 (coding-system-property coding-system 'no-iso6429))
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173
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174 (defun coding-system-ccl-encode (coding-system)
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175 "Return the CCL 'encode property of CODING-SYSTEM."
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176 (coding-system-property coding-system 'encode))
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177
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178 (defun coding-system-ccl-decode (coding-system)
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179 "Return the CCL 'decode property of CODING-SYSTEM."
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180 (coding-system-property coding-system 'decode))
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181
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182
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183 ;;;; Definitions of predefined coding systems
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184
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185 (make-coding-system
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186 'autodetect 'autodetect
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187 "Automatic conversion."
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188 '(mnemonic "Auto"))
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189
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190 (make-coding-system
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191 'ctext 'iso2022
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192 "Coding-system used in X as Compound Text Encoding."
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193 '(charset-g0 ascii
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194 charset-g1 latin-1
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195 eol-type lf
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196 mnemonic "CText"
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197 ))
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198
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199 (make-coding-system
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200 'iso-2022-ss2-8 'iso2022
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201 "ISO-2022 coding system using SS2 for 96-charset in 8-bit code."
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202 '(charset-g0 ascii
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203 charset-g1 latin-1
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204 charset-g2 t ;; unspecified but can be used later.
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205 short t
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206 mnemonic "ISO8/SS"
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207 ))
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208
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209 (make-coding-system
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210 'iso-2022-ss2-7 'iso2022
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211 "ISO-2022 coding system using SS2 for 96-charset in 7-bit code."
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212 '(charset-g0 ascii
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213 charset-g2 t ;; unspecified but can be used later.
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214 seven t
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215 short t
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216 mnemonic "ISO7/SS"
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217 ))
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218
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219 (make-coding-system
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220 'iso-2022-7 'iso2022
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221 "ISO-2022 seven-bit coding system. No single-shift or locking-shift."
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222 '(charset-g0 ascii
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223 seven t
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224 short t
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225 mnemonic "ISO7"
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226 ))
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227
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228 (make-coding-system
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229 'iso-2022-8 'iso2022
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230 "ISO-2022 eight-bit coding system. No single-shift or locking-shift."
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231 '(charset-g0 ascii
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232 charset-g1 latin-1
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233 short t
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234 mnemonic "ISO8"
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235 ))
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236
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237 (make-coding-system
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238 'escape-quoted 'iso2022
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239 "ISO-2022 eight-bit coding system with escape quoting; used for .ELC files."
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240 '(charset-g0 ascii
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241 charset-g1 latin-1
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242 eol-type lf
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243 escape-quoted t
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244 mnemonic "ESC/Quot"
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245 ))
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246
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247 (make-coding-system
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248 'iso-2022-lock 'iso2022
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249 "ISO-2022 coding system using Locking-Shift for 96-charset."
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250 '(charset-g0 ascii
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251 charset-g1 t ;; unspecified but can be used later.
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252 seven t
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253 lock-shift t
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254 mnemonic "ISO7/Lock"
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255 ))
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256
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257 ;; initialize the coding categories to something semi-reasonable
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258 ;; so that the remaining Lisp files can contain extended characters.
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259 ;; (They will be in ISO-7 format)
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260
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261 (set-coding-priority-list '(iso-8-2 shift-jis iso-8-designate iso-8-1 big5
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262 iso-7 iso-lock-shift no-conversion))
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263
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264 (set-coding-category-system 'iso-7 'iso-2022-7)
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265 (set-coding-category-system 'iso-8-designate 'ctext)
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266 (set-coding-category-system 'iso-8-1 'ctext)
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267 (set-coding-category-system 'iso-lock-shift 'iso-2022-lock)
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268 (set-coding-category-system 'no-conversion 'no-conversion)
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