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771
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1 /* Text encoding conversion functions; coding-system object.
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2 #### rename me to coding-system.c or coding.c
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428
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3 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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1318
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5 Copyright (C) 2000, 2001, 2002, 2003 Ben Wing.
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428
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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 the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 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
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21 the 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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771
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24 /* Synched up with: Not in FSF. */
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25
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26 /* Authorship:
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27
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28 Current primary author: Ben Wing <ben@xemacs.org>
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29
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30 Rewritten by Ben Wing <ben@xemacs.org>, based originally on coding.c
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31 from Mule 2.? but probably does not share one line of code with that
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32 original source. Rewriting work started around Dec. 1994. or Jan. 1995.
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33 Proceeded in earnest till Nov. 1995.
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34
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35 Around Feb. 17, 1998, Andy Piper renamed what was then mule-coding.c to
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36 file-coding.c, with the intention of using it to do end-of-line conversion
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37 on non-MULE machines (specifically, on Windows machines). He separated
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38 out the MULE stuff from non-MULE using ifdef's, and searched throughout
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39 the rest of the source tree looking for coding-system-related code that
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40 was ifdef MULE but should be ifdef HAVE_CODING_SYSTEMS.
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41
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42 Sept. 4 - 8, 1998, Tomohiko Morioka added the UCS_4 and UTF_8 coding system
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43 types, providing a primitive means of decoding and encoding externally-
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44 formatted Unicode/UCS_4 and Unicode/UTF_8 data.
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45
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46 January 25, 2000, Martin Buchholz redid and fleshed out the coding
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47 system alias handling that was first added in prototype form by
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48 Hrjove Niksic, April 15, 1999.
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49
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50 April to May 2000, Ben Wing: More major reorganization. Adding features
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51 needed for MS Windows (multibyte, unicode, unicode-to-multibyte), the
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52 "chain" coding system for chaining two together, and doing a lot of
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53 reorganization in preparation for properly abstracting out the different
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54 coding system types.
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55
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56 June 2001, Ben Wing: Added Unicode support. Eliminated previous
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57 junky Unicode translation support.
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58
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59 August 2001, Ben Wing: Moved Unicode support to unicode.c. Finished
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60 abstracting everything except detection, which is hard to abstract (see
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61 just below).
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62
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63 September 2001, Ben Wing: Moved Mule code to mule-coding.c, Windows code
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64 to intl-win32.c. Lots more rewriting; very little code is untouched
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65 from before April 2000. Abstracted the detection code, added multiple
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66 levels of likelihood to increase the reliability of the algorithm.
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67
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68 October 2001, Ben Wing: HAVE_CODING_SYSTEMS is always now defined.
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69 Removed the conditionals.
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70 */
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71
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428
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72 #include <config.h>
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73 #include "lisp.h"
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74
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75 #include "buffer.h"
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76 #include "elhash.h"
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77 #include "insdel.h"
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78 #include "lstream.h"
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440
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79 #include "opaque.h"
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771
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80 #include "file-coding.h"
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81
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82 #ifdef HAVE_ZLIB
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83 #include "zlib.h"
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428
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84 #endif
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85
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86 Lisp_Object Vkeyboard_coding_system;
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87 Lisp_Object Vterminal_coding_system;
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88 Lisp_Object Vcoding_system_for_read;
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89 Lisp_Object Vcoding_system_for_write;
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90 Lisp_Object Vfile_name_coding_system;
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91
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771
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92 #ifdef DEBUG_XEMACS
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93 Lisp_Object Vdebug_coding_detection;
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440
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94 #endif
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771
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95
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96 typedef struct coding_system_type_entry
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97 {
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98 struct coding_system_methods *meths;
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99 } coding_system_type_entry;
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100
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101 typedef struct
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102 {
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103 Dynarr_declare (coding_system_type_entry);
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104 } coding_system_type_entry_dynarr;
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105
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106 static coding_system_type_entry_dynarr *the_coding_system_type_entry_dynarr;
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107
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1204
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108 static const struct memory_description cste_description_1[] = {
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2367
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109 { XD_BLOCK_PTR, offsetof (coding_system_type_entry, meths), 1, &coding_system_methods_description },
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771
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110 { XD_END }
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111 };
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112
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1204
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113 static const struct sized_memory_description cste_description = {
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771
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114 sizeof (coding_system_type_entry),
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115 cste_description_1
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116 };
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117
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1204
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118 static const struct memory_description csted_description_1[] = {
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771
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119 XD_DYNARR_DESC (coding_system_type_entry_dynarr, &cste_description),
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428
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120 { XD_END }
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121 };
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122
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1204
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123 static const struct sized_memory_description csted_description = {
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771
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124 sizeof (coding_system_type_entry_dynarr),
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125 csted_description_1
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126 };
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127
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128 static Lisp_Object Vcoding_system_type_list;
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129
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130 /* Coding system currently associated with each coding category. */
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131 Lisp_Object coding_category_system[MAX_DETECTOR_CATEGORIES];
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132
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133 /* Table of all coding categories in decreasing order of priority.
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134 This describes a permutation of the possible coding categories. */
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135 int coding_category_by_priority[MAX_DETECTOR_CATEGORIES];
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136
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137 /* Value used with to give a unique name to nameless coding systems */
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138 int coding_system_tick;
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139
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140 int coding_detector_count;
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141 int coding_detector_category_count;
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142
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143 detector_dynarr *all_coding_detectors;
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144
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1204
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145 static const struct memory_description struct_detector_category_description_1[]
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771
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146 =
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147 {
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148 { XD_LISP_OBJECT, offsetof (struct detector_category, sym) },
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149 { XD_END }
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150 };
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151
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1204
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152 static const struct sized_memory_description struct_detector_category_description =
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771
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153 {
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154 sizeof (struct detector_category),
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155 struct_detector_category_description_1
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428
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156 };
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157
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1204
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158 static const struct memory_description detector_category_dynarr_description_1[] =
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771
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159 {
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160 XD_DYNARR_DESC (detector_category_dynarr,
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161 &struct_detector_category_description),
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162 { XD_END }
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163 };
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164
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1204
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165 static const struct sized_memory_description detector_category_dynarr_description = {
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771
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166 sizeof (detector_category_dynarr),
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167 detector_category_dynarr_description_1
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168 };
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169
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1204
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170 static const struct memory_description struct_detector_description_1[]
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771
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171 =
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172 {
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2367
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173 { XD_BLOCK_PTR, offsetof (struct detector, cats), 1,
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771
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174 &detector_category_dynarr_description },
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175 { XD_END }
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176 };
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177
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1204
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178 static const struct sized_memory_description struct_detector_description =
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771
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179 {
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180 sizeof (struct detector),
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181 struct_detector_description_1
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182 };
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183
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1204
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184 static const struct memory_description detector_dynarr_description_1[] =
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771
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185 {
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186 XD_DYNARR_DESC (detector_dynarr, &struct_detector_description),
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187 { XD_END }
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188 };
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189
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1204
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190 static const struct sized_memory_description detector_dynarr_description = {
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771
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191 sizeof (detector_dynarr),
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192 detector_dynarr_description_1
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193 };
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428
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194
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195 Lisp_Object Qcoding_systemp;
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196
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771
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197 Lisp_Object Qraw_text;
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428
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198
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199 Lisp_Object Qmnemonic, Qeol_type;
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200 Lisp_Object Qcr, Qcrlf, Qlf;
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201 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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202 Lisp_Object Qpost_read_conversion;
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203 Lisp_Object Qpre_write_conversion;
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204
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771
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205 Lisp_Object Qtranslation_table_for_decode;
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206 Lisp_Object Qtranslation_table_for_encode;
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207 Lisp_Object Qsafe_chars;
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208 Lisp_Object Qsafe_charsets;
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209 Lisp_Object Qmime_charset;
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210 Lisp_Object Qvalid_codes;
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211
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212 Lisp_Object Qno_conversion;
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213 Lisp_Object Qconvert_eol;
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440
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214 Lisp_Object Qescape_quoted;
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771
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215 Lisp_Object Qencode, Qdecode;
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216
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217 Lisp_Object Qconvert_eol_lf, Qconvert_eol_cr, Qconvert_eol_crlf;
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218 Lisp_Object Qconvert_eol_autodetect;
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219
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220 Lisp_Object Qnear_certainty, Qquite_probable, Qsomewhat_likely;
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1494
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221 Lisp_Object Qslightly_likely;
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771
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222 Lisp_Object Qas_likely_as_unlikely, Qsomewhat_unlikely, Qquite_improbable;
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223 Lisp_Object Qnearly_impossible;
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224
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225 Lisp_Object Qdo_eol, Qdo_coding;
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226
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227 Lisp_Object Qcanonicalize_after_coding;
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228
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1347
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229 Lisp_Object QScoding_system_cookie;
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230
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771
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231 /* This is used to convert autodetected coding systems into existing
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232 systems. For example, the chain undecided->convert-eol-autodetect may
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233 have its separate parts detected as mswindows-multibyte and
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234 convert-eol-crlf, and the result needs to be mapped to
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235 mswindows-multibyte-dos. */
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236 /* #### It's not clear we need this whole chain-canonicalize mechanism
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237 any more. */
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238 static Lisp_Object Vchain_canonicalize_hash_table;
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239
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240 #ifdef HAVE_ZLIB
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241 Lisp_Object Qgzip;
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428
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242 #endif
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771
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243
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2297
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244 /* Maps symbols (coding system names) to either coding system objects or
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245 (for aliases) other names. */
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771
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246 static Lisp_Object Vcoding_system_hash_table;
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428
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247
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248 int enable_multibyte_characters;
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249
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250 EXFUN (Fcopy_coding_system, 2);
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251
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252
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253 /************************************************************************/
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771
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254 /* Coding system object methods */
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428
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255 /************************************************************************/
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256
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257 static Lisp_Object
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258 mark_coding_system (Lisp_Object obj)
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259 {
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260 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
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261
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1204
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262 #define MARKED_SLOT(x) mark_object (codesys->x);
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263 #include "coding-system-slots.h"
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771
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264
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265 MAYBE_CODESYSMETH (codesys, mark, (obj));
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428
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266
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1204
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267 return Qnil;
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428
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268 }
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269
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270 static void
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771
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271 print_coding_system_properties (Lisp_Object obj, Lisp_Object printcharfun)
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272 {
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273 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
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274 print_internal (c->methods->type, printcharfun, 1);
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275 MAYBE_CODESYSMETH (c, print, (obj, printcharfun, 1));
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276 if (CODING_SYSTEM_EOL_TYPE (c) != EOL_AUTODETECT)
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277 write_fmt_string_lisp (printcharfun, " eol-type=%s",
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278 1, Fcoding_system_property (obj, Qeol_type));
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279 }
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280
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281 static void
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428
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282 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
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2286
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283 int UNUSED (escapeflag))
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428
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284 {
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285 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
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286 if (print_readably)
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771
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287 printing_unreadable_object
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288 ("printing unreadable object #<coding-system 0x%x>", c->header.uid);
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289
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290 write_fmt_string_lisp (printcharfun, "#<coding-system %s ", 1, c->name);
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291 print_coding_system_properties (obj, printcharfun);
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826
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292 write_c_string (printcharfun, ">");
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428
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293 }
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294
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771
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295 /* Print an abbreviated version of a coding system (but still containing
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296 all the information), for use within a coding system print method. */
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297
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298 static void
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299 print_coding_system_in_print_method (Lisp_Object cs, Lisp_Object printcharfun,
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2286
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300 int UNUSED (escapeflag))
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771
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301 {
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800
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302 write_fmt_string_lisp (printcharfun, "%s[", 1, XCODING_SYSTEM_NAME (cs));
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771
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303 print_coding_system_properties (cs, printcharfun);
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826
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304 write_c_string (printcharfun, "]");
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771
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305 }
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306
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428
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307 static void
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308 finalize_coding_system (void *header, int for_disksave)
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309 {
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771
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310 Lisp_Object cs = wrap_coding_system ((Lisp_Coding_System *) header);
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428
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311 /* Since coding systems never go away, this function is not
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312 necessary. But it would be necessary if we changed things
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313 so that coding systems could go away. */
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314 if (!for_disksave) /* see comment in lstream.c */
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771
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315 MAYBE_XCODESYSMETH (cs, finalize, (cs));
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316 }
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317
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318 static Bytecount
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319 sizeof_coding_system (const void *header)
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320 {
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321 const Lisp_Coding_System *p = (const Lisp_Coding_System *) header;
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322 return offsetof (Lisp_Coding_System, data) + p->methods->extra_data_size;
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428
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323 }
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324
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1204
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325 static const struct memory_description coding_system_methods_description_1[]
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771
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326 = {
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327 { XD_LISP_OBJECT,
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328 offsetof (struct coding_system_methods, type) },
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329 { XD_LISP_OBJECT,
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330 offsetof (struct coding_system_methods, predicate_symbol) },
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331 { XD_END }
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332 };
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333
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1204
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334 const struct sized_memory_description coding_system_methods_description = {
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771
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335 sizeof (struct coding_system_methods),
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336 coding_system_methods_description_1
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337 };
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338
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1204
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339 static const struct sized_memory_description coding_system_extra_description_map[] =
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340 {
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341 { offsetof (Lisp_Coding_System, methods) },
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342 { offsetof (struct coding_system_methods, extra_description) },
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343 { -1 },
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771
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344 };
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345
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1204
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346 static const struct memory_description coding_system_description[] =
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428
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347 {
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2367
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348 { XD_BLOCK_PTR, offsetof (Lisp_Coding_System, methods), 1,
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771
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349 &coding_system_methods_description },
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1204
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350 #define MARKED_SLOT(x) { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, x) },
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351 #define MARKED_SLOT_ARRAY(slot, size) \
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352 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, slot), size },
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353 #include "coding-system-slots.h"
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2367
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354 { XD_BLOCK_ARRAY, offsetof (Lisp_Coding_System, data), 1,
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1204
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355 coding_system_extra_description_map },
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356 { XD_END }
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771
|
357 };
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358
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1204
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359 static const struct memory_description coding_system_empty_extra_description_1[] =
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360 {
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361 { XD_END }
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362 };
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363
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364 const struct sized_memory_description coding_system_empty_extra_description = {
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365 0, coding_system_empty_extra_description_1
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366 };
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367
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934
|
368 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system,
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369 1, /*dumpable-flag*/
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370 mark_coding_system,
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371 print_coding_system,
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372 finalize_coding_system,
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373 0, 0, coding_system_description,
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374 sizeof_coding_system,
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375 Lisp_Coding_System);
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|
771
|
376
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377 /************************************************************************/
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|
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378 /* Creating coding systems */
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379 /************************************************************************/
|
|
|
380
|
|
|
381 static struct coding_system_methods *
|
|
|
382 decode_coding_system_type (Lisp_Object type, Error_Behavior errb)
|
|
428
|
383 {
|
|
771
|
384 int i;
|
|
|
385
|
|
|
386 for (i = 0; i < Dynarr_length (the_coding_system_type_entry_dynarr); i++)
|
|
428
|
387 {
|
|
771
|
388 if (EQ (type,
|
|
|
389 Dynarr_at (the_coding_system_type_entry_dynarr, i).meths->type))
|
|
|
390 return Dynarr_at (the_coding_system_type_entry_dynarr, i).meths;
|
|
428
|
391 }
|
|
771
|
392
|
|
|
393 maybe_invalid_constant ("Invalid coding system type", type,
|
|
|
394 Qcoding_system, errb);
|
|
|
395
|
|
|
396 return 0;
|
|
428
|
397 }
|
|
|
398
|
|
771
|
399 static int
|
|
|
400 valid_coding_system_type_p (Lisp_Object type)
|
|
428
|
401 {
|
|
771
|
402 return decode_coding_system_type (type, ERROR_ME_NOT) != 0;
|
|
|
403 }
|
|
|
404
|
|
|
405 DEFUN ("valid-coding-system-type-p", Fvalid_coding_system_type_p, 1, 1, 0, /*
|
|
|
406 Given a CODING-SYSTEM-TYPE, return non-nil if it is valid.
|
|
|
407 Valid types depend on how XEmacs was compiled but may include
|
|
|
408 'undecided, 'chain, 'integer, 'ccl, 'iso2022, 'big5, 'shift-jis,
|
|
|
409 'utf-16, 'ucs-4, 'utf-8, etc.
|
|
|
410 */
|
|
|
411 (coding_system_type))
|
|
|
412 {
|
|
|
413 return valid_coding_system_type_p (coding_system_type) ? Qt : Qnil;
|
|
|
414 }
|
|
|
415
|
|
|
416 DEFUN ("coding-system-type-list", Fcoding_system_type_list, 0, 0, 0, /*
|
|
|
417 Return a list of valid coding system types.
|
|
|
418 */
|
|
|
419 ())
|
|
|
420 {
|
|
|
421 return Fcopy_sequence (Vcoding_system_type_list);
|
|
|
422 }
|
|
|
423
|
|
|
424 void
|
|
|
425 add_entry_to_coding_system_type_list (struct coding_system_methods *meths)
|
|
|
426 {
|
|
|
427 struct coding_system_type_entry entry;
|
|
|
428
|
|
|
429 entry.meths = meths;
|
|
|
430 Dynarr_add (the_coding_system_type_entry_dynarr, entry);
|
|
|
431 Vcoding_system_type_list = Fcons (meths->type, Vcoding_system_type_list);
|
|
428
|
432 }
|
|
|
433
|
|
|
434 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
|
435 Return t if OBJECT is a coding system.
|
|
|
436 A coding system is an object that defines how text containing multiple
|
|
|
437 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
438 The coding system is used to decode the stream into a series of
|
|
|
439 characters (which may be from multiple charsets) when the text is read
|
|
|
440 from a file or process, and is used to encode the text back into the
|
|
|
441 same format when it is written out to a file or process.
|
|
|
442
|
|
|
443 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
444 Text, which is used for inter-client data under the X Window System)
|
|
|
445 use escape sequences to switch between different charsets -- Japanese
|
|
|
446 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
447 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
|
448 `make-coding-system' for more information.
|
|
|
449
|
|
|
450 Coding systems are normally identified using a symbol, and the
|
|
|
451 symbol is accepted in place of the actual coding system object whenever
|
|
|
452 a coding system is called for. (This is similar to how faces work.)
|
|
|
453 */
|
|
|
454 (object))
|
|
|
455 {
|
|
|
456 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
457 }
|
|
|
458
|
|
|
459 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
460 Retrieve the coding system of the given name.
|
|
|
461
|
|
|
462 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
463 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
464 If there is no such coding system, nil is returned. Otherwise the
|
|
|
465 associated coding system object is returned.
|
|
|
466 */
|
|
|
467 (coding_system_or_name))
|
|
|
468 {
|
|
|
469 if (NILP (coding_system_or_name))
|
|
|
470 coding_system_or_name = Qbinary;
|
|
440
|
471 else if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
472 return coding_system_or_name;
|
|
428
|
473 else
|
|
|
474 CHECK_SYMBOL (coding_system_or_name);
|
|
|
475
|
|
440
|
476 while (1)
|
|
|
477 {
|
|
|
478 coding_system_or_name =
|
|
|
479 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
|
|
480
|
|
771
|
481 if (CODING_SYSTEMP (coding_system_or_name)
|
|
|
482 || NILP (coding_system_or_name))
|
|
440
|
483 return coding_system_or_name;
|
|
|
484 }
|
|
428
|
485 }
|
|
|
486
|
|
|
487 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
488 Retrieve the coding system of the given name.
|
|
|
489 Same as `find-coding-system' except that if there is no such
|
|
|
490 coding system, an error is signaled instead of returning nil.
|
|
|
491 */
|
|
|
492 (name))
|
|
|
493 {
|
|
|
494 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
495
|
|
|
496 if (NILP (coding_system))
|
|
563
|
497 invalid_argument ("No such coding system", name);
|
|
428
|
498 return coding_system;
|
|
|
499 }
|
|
|
500
|
|
771
|
501 int
|
|
|
502 coding_system_is_binary (Lisp_Object coding_system)
|
|
|
503 {
|
|
|
504 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
505 return
|
|
|
506 (EQ (CODING_SYSTEM_TYPE (cs), Qno_conversion) &&
|
|
|
507 CODING_SYSTEM_EOL_TYPE (cs) == EOL_LF &&
|
|
|
508 EQ (CODING_SYSTEM_POST_READ_CONVERSION (cs), Qnil) &&
|
|
|
509 EQ (CODING_SYSTEM_PRE_WRITE_CONVERSION (cs), Qnil));
|
|
|
510 }
|
|
|
511
|
|
|
512 static Lisp_Object
|
|
|
513 coding_system_real_canonical (Lisp_Object cs)
|
|
|
514 {
|
|
|
515 if (!NILP (XCODING_SYSTEM_CANONICAL (cs)))
|
|
|
516 return XCODING_SYSTEM_CANONICAL (cs);
|
|
|
517 return cs;
|
|
|
518 }
|
|
|
519
|
|
|
520 /* Return true if coding system is of the "standard" type that decodes
|
|
|
521 bytes into characters (suitable for decoding a text file). */
|
|
|
522 int
|
|
|
523 coding_system_is_for_text_file (Lisp_Object coding_system)
|
|
|
524 {
|
|
|
525 return (XCODESYSMETH_OR_GIVEN
|
|
|
526 (coding_system, conversion_end_type,
|
|
|
527 (coding_system_real_canonical (coding_system)),
|
|
|
528 DECODES_BYTE_TO_CHARACTER) ==
|
|
|
529 DECODES_BYTE_TO_CHARACTER);
|
|
|
530 }
|
|
|
531
|
|
|
532 static int
|
|
|
533 decoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex)
|
|
|
534 {
|
|
|
535 enum source_sink_type type =
|
|
|
536 XCODESYSMETH_OR_GIVEN (cs, conversion_end_type,
|
|
|
537 (coding_system_real_canonical (cs)),
|
|
|
538 DECODES_BYTE_TO_CHARACTER);
|
|
|
539 if (sex == CODING_SOURCE)
|
|
|
540 return (type == DECODES_CHARACTER_TO_CHARACTER ||
|
|
|
541 type == DECODES_CHARACTER_TO_BYTE);
|
|
|
542 else
|
|
|
543 return (type == DECODES_CHARACTER_TO_CHARACTER ||
|
|
|
544 type == DECODES_BYTE_TO_CHARACTER);
|
|
|
545 }
|
|
|
546
|
|
|
547 static int
|
|
|
548 encoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex)
|
|
|
549 {
|
|
|
550 return decoding_source_sink_type_is_char (cs,
|
|
|
551 /* Sex change */
|
|
|
552 sex == CODING_SOURCE ?
|
|
|
553 CODING_SINK : CODING_SOURCE);
|
|
|
554 }
|
|
|
555
|
|
|
556 /* Like Ffind_coding_system() but check that the coding system is of the
|
|
|
557 "standard" type that decodes bytes into characters (suitable for
|
|
|
558 decoding a text file), and if not, returns an appropriate wrapper that
|
|
|
559 does. Also, if EOL_WRAP is non-zero, check whether this coding system
|
|
|
560 wants EOL auto-detection, and if so, wrap with a convert-eol coding
|
|
|
561 system to do this. */
|
|
|
562
|
|
|
563 Lisp_Object
|
|
|
564 find_coding_system_for_text_file (Lisp_Object name, int eol_wrap)
|
|
|
565 {
|
|
|
566 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
567 Lisp_Object wrapper = coding_system;
|
|
|
568
|
|
|
569 if (NILP (coding_system))
|
|
|
570 return Qnil;
|
|
|
571 if (!coding_system_is_for_text_file (coding_system))
|
|
|
572 {
|
|
|
573 wrapper = XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system);
|
|
|
574 if (NILP (wrapper))
|
|
|
575 {
|
|
|
576 Lisp_Object chain;
|
|
|
577 if (!decoding_source_sink_type_is_char (coding_system, CODING_SINK))
|
|
|
578 chain = list2 (coding_system, Qbinary);
|
|
|
579 else
|
|
|
580 chain = list1 (coding_system);
|
|
|
581 if (decoding_source_sink_type_is_char (coding_system, CODING_SOURCE))
|
|
|
582 chain = Fcons (Qbinary, chain);
|
|
|
583 wrapper =
|
|
|
584 make_internal_coding_system
|
|
|
585 (coding_system,
|
|
|
586 "internal-text-file-wrapper",
|
|
|
587 Qchain,
|
|
|
588 Qunbound, list4 (Qchain, chain,
|
|
|
589 Qcanonicalize_after_coding, coding_system));
|
|
|
590 XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system) = wrapper;
|
|
|
591 }
|
|
|
592 }
|
|
|
593
|
|
|
594 if (!eol_wrap || XCODING_SYSTEM_EOL_TYPE (coding_system) != EOL_AUTODETECT)
|
|
|
595 return wrapper;
|
|
|
596
|
|
|
597 coding_system = wrapper;
|
|
|
598 wrapper = XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system);
|
|
|
599 if (!NILP (wrapper))
|
|
|
600 return wrapper;
|
|
|
601 wrapper =
|
|
|
602 make_internal_coding_system
|
|
|
603 (coding_system,
|
|
|
604 "internal-auto-eol-wrapper",
|
|
|
605 Qundecided, Qunbound,
|
|
|
606 list4 (Qcoding_system, coding_system,
|
|
|
607 Qdo_eol, Qt));
|
|
|
608 XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system) = wrapper;
|
|
|
609 return wrapper;
|
|
|
610 }
|
|
|
611
|
|
|
612 /* Like Fget_coding_system() but verify that the coding system is of the
|
|
|
613 "standard" type that decodes bytes into characters (suitable for
|
|
|
614 decoding a text file), and if not, returns an appropriate wrapper that
|
|
|
615 does. Also, if EOL_WRAP is non-zero, check whether this coding system
|
|
|
616 wants EOL auto-detection, and if so, wrap with a convert-eol coding
|
|
|
617 system to do this. */
|
|
|
618
|
|
|
619 Lisp_Object
|
|
|
620 get_coding_system_for_text_file (Lisp_Object name, int eol_wrap)
|
|
|
621 {
|
|
|
622 Lisp_Object coding_system = find_coding_system_for_text_file (name,
|
|
|
623 eol_wrap);
|
|
|
624 if (NILP (coding_system))
|
|
|
625 invalid_argument ("No such coding system", name);
|
|
|
626 return coding_system;
|
|
|
627 }
|
|
|
628
|
|
|
629 /* We store the coding systems in hash tables with the names as the
|
|
|
630 key and the actual coding system object as the value. Occasionally
|
|
|
631 we need to use them in a list format. These routines provide us
|
|
|
632 with that. */
|
|
428
|
633 struct coding_system_list_closure
|
|
|
634 {
|
|
|
635 Lisp_Object *coding_system_list;
|
|
771
|
636 int normal;
|
|
|
637 int internal;
|
|
428
|
638 };
|
|
|
639
|
|
|
640 static int
|
|
2286
|
641 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object UNUSED (value),
|
|
428
|
642 void *coding_system_list_closure)
|
|
|
643 {
|
|
|
644 /* This function can GC */
|
|
|
645 struct coding_system_list_closure *cscl =
|
|
|
646 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
|
647 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
|
648
|
|
771
|
649 /* We can't just use VALUE because KEY might be an alias, and we need
|
|
|
650 the real coding system object. */
|
|
|
651 if (XCODING_SYSTEM (Ffind_coding_system (key))->internal_p ?
|
|
|
652 cscl->internal : cscl->normal)
|
|
|
653 *coding_system_list = Fcons (key, *coding_system_list);
|
|
428
|
654 return 0;
|
|
|
655 }
|
|
|
656
|
|
2297
|
657 /* #### should we specify a conventional for "all coding systems"? */
|
|
771
|
658 DEFUN ("coding-system-list", Fcoding_system_list, 0, 1, 0, /*
|
|
428
|
659 Return a list of the names of all defined coding systems.
|
|
771
|
660 If INTERNAL is nil, only the normal (non-internal) coding systems are
|
|
|
661 included. (Internal coding systems are created for various internal
|
|
|
662 purposes, such as implementing EOL types of CRLF and CR; generally, you do
|
|
|
663 not want to see these.) If it is t, only the internal coding systems are
|
|
|
664 included. If it is any other non-nil value both normal and internal are
|
|
|
665 included.
|
|
428
|
666 */
|
|
771
|
667 (internal))
|
|
428
|
668 {
|
|
|
669 Lisp_Object coding_system_list = Qnil;
|
|
|
670 struct gcpro gcpro1;
|
|
|
671 struct coding_system_list_closure coding_system_list_closure;
|
|
|
672
|
|
|
673 GCPRO1 (coding_system_list);
|
|
|
674 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
771
|
675 coding_system_list_closure.normal = !EQ (internal, Qt);
|
|
|
676 coding_system_list_closure.internal = !NILP (internal);
|
|
428
|
677 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
|
|
678 &coding_system_list_closure);
|
|
|
679 UNGCPRO;
|
|
|
680
|
|
|
681 return coding_system_list;
|
|
|
682 }
|
|
|
683
|
|
|
684 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
685 Return the name of the given coding system.
|
|
|
686 */
|
|
|
687 (coding_system))
|
|
|
688 {
|
|
|
689 coding_system = Fget_coding_system (coding_system);
|
|
|
690 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
691 }
|
|
|
692
|
|
|
693 static Lisp_Coding_System *
|
|
771
|
694 allocate_coding_system (struct coding_system_methods *codesys_meths,
|
|
|
695 Bytecount data_size,
|
|
|
696 Lisp_Object name)
|
|
428
|
697 {
|
|
771
|
698 Bytecount total_size = offsetof (Lisp_Coding_System, data) + data_size;
|
|
428
|
699 Lisp_Coding_System *codesys =
|
|
1204
|
700 (Lisp_Coding_System *) basic_alloc_lcrecord (total_size,
|
|
|
701 &lrecord_coding_system);
|
|
|
702
|
|
771
|
703 codesys->methods = codesys_meths;
|
|
1204
|
704 #define MARKED_SLOT(x) codesys->x = Qnil;
|
|
|
705 #include "coding-system-slots.h"
|
|
|
706
|
|
771
|
707 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_LF;
|
|
|
708 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
709
|
|
|
710 MAYBE_CODESYSMETH (codesys, init, (wrap_coding_system (codesys)));
|
|
428
|
711
|
|
|
712 return codesys;
|
|
|
713 }
|
|
|
714
|
|
771
|
715 static enum eol_type
|
|
|
716 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
717 {
|
|
|
718 CHECK_SYMBOL (symbol);
|
|
|
719 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
720 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
721 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
722 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
723
|
|
|
724 invalid_constant ("Unrecognized eol type", symbol);
|
|
1204
|
725 RETURN_NOT_REACHED (EOL_AUTODETECT);
|
|
771
|
726 }
|
|
|
727
|
|
|
728 static Lisp_Object
|
|
|
729 eol_type_to_symbol (enum eol_type type)
|
|
|
730 {
|
|
|
731 switch (type)
|
|
|
732 {
|
|
|
733 default: abort ();
|
|
|
734 case EOL_LF: return Qlf;
|
|
|
735 case EOL_CRLF: return Qcrlf;
|
|
|
736 case EOL_CR: return Qcr;
|
|
|
737 case EOL_AUTODETECT: return Qnil;
|
|
|
738 }
|
|
|
739 }
|
|
|
740
|
|
|
741 struct subsidiary_type
|
|
|
742 {
|
|
2367
|
743 Ascbyte *extension;
|
|
|
744 Ascbyte *mnemonic_ext;
|
|
771
|
745 enum eol_type eol;
|
|
|
746 };
|
|
|
747
|
|
|
748 static struct subsidiary_type coding_subsidiary_list[] =
|
|
|
749 { { "-unix", "", EOL_LF },
|
|
|
750 { "-dos", ":T", EOL_CRLF },
|
|
|
751 { "-mac", ":t", EOL_CR } };
|
|
|
752
|
|
|
753 /* kludge */
|
|
428
|
754 static void
|
|
771
|
755 setup_eol_coding_systems (Lisp_Object codesys)
|
|
428
|
756 {
|
|
793
|
757 int len = XSTRING_LENGTH (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name);
|
|
2367
|
758 Ibyte *codesys_name = alloca_ibytes (len + 7);
|
|
771
|
759 int mlen = -1;
|
|
867
|
760 Ibyte *codesys_mnemonic = 0;
|
|
771
|
761 Lisp_Object codesys_name_sym, sub_codesys;
|
|
|
762 int i;
|
|
|
763
|
|
|
764 memcpy (codesys_name,
|
|
793
|
765 XSTRING_DATA (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name), len);
|
|
771
|
766
|
|
|
767 if (STRINGP (XCODING_SYSTEM_MNEMONIC (codesys)))
|
|
428
|
768 {
|
|
771
|
769 mlen = XSTRING_LENGTH (XCODING_SYSTEM_MNEMONIC (codesys));
|
|
2367
|
770 codesys_mnemonic = alloca_ibytes (mlen + 7);
|
|
771
|
771 memcpy (codesys_mnemonic,
|
|
|
772 XSTRING_DATA (XCODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
|
773 }
|
|
|
774
|
|
|
775 /* Create three "subsidiary" coding systems, decoding data encoded using
|
|
|
776 each of the three EOL types. We do this for each subsidiary by
|
|
|
777 copying the original coding system, setting the EOL type
|
|
|
778 appropriately, and setting the CANONICAL member of the new coding
|
|
|
779 system to be a chain consisting of the original coding system followed
|
|
|
780 by a convert-eol coding system to do the EOL decoding. For EOL type
|
|
|
781 LF, however, we don't need any decoding, so we skip creating a
|
|
|
782 CANONICAL.
|
|
|
783
|
|
|
784 If the original coding system is not a text-type coding system
|
|
|
785 (decodes byte->char), we need to coerce it to one by the appropriate
|
|
|
786 wrapping in CANONICAL. */
|
|
|
787
|
|
|
788 for (i = 0; i < countof (coding_subsidiary_list); i++)
|
|
|
789 {
|
|
2367
|
790 Ascbyte *extension = coding_subsidiary_list[i].extension;
|
|
|
791 Ascbyte *mnemonic_ext = coding_subsidiary_list[i].mnemonic_ext;
|
|
771
|
792 enum eol_type eol = coding_subsidiary_list[i].eol;
|
|
|
793
|
|
2367
|
794 qxestrcpy_ascii (codesys_name + len, extension);
|
|
771
|
795 codesys_name_sym = intern_int (codesys_name);
|
|
|
796 if (mlen != -1)
|
|
2367
|
797 qxestrcpy_ascii (codesys_mnemonic + mlen, mnemonic_ext);
|
|
771
|
798
|
|
|
799 sub_codesys = Fcopy_coding_system (codesys, codesys_name_sym);
|
|
|
800 if (mlen != -1)
|
|
|
801 XCODING_SYSTEM_MNEMONIC (sub_codesys) =
|
|
|
802 build_intstring (codesys_mnemonic);
|
|
|
803
|
|
|
804 if (eol != EOL_LF)
|
|
|
805 {
|
|
|
806 Lisp_Object chain = list2 (get_coding_system_for_text_file
|
|
|
807 (codesys, 0),
|
|
|
808 eol == EOL_CR ? Qconvert_eol_cr :
|
|
|
809 Qconvert_eol_crlf);
|
|
|
810 Lisp_Object canon =
|
|
|
811 make_internal_coding_system
|
|
|
812 (sub_codesys, "internal-subsidiary-eol-wrapper",
|
|
|
813 Qchain, Qunbound,
|
|
|
814 mlen != -1 ?
|
|
|
815 list6 (Qmnemonic, build_intstring (codesys_mnemonic),
|
|
|
816 Qchain, chain,
|
|
|
817 Qcanonicalize_after_coding, sub_codesys) :
|
|
|
818 list4 (Qchain, chain,
|
|
|
819 Qcanonicalize_after_coding, sub_codesys));
|
|
|
820 XCODING_SYSTEM_CANONICAL (sub_codesys) = canon;
|
|
|
821 }
|
|
|
822 XCODING_SYSTEM_EOL_TYPE (sub_codesys) = eol;
|
|
|
823 XCODING_SYSTEM_SUBSIDIARY_PARENT (sub_codesys) = codesys;
|
|
|
824 XCODING_SYSTEM (codesys)->eol[eol] = sub_codesys;
|
|
428
|
825 }
|
|
|
826 }
|
|
|
827
|
|
771
|
828 /* Basic function to create new coding systems. For `make-coding-system',
|
|
|
829 NAME-OR-EXISTING is the NAME argument, PREFIX is null, and TYPE,
|
|
|
830 DESCRIPTION, and PROPS are the same. All created coding systems are put
|
|
|
831 in a hash table indexed by NAME.
|
|
|
832
|
|
|
833 If PREFIX is a string, NAME-OR-EXISTING should specify an existing
|
|
|
834 coding system (or nil), and an internal coding system will be created.
|
|
|
835 The name of the coding system will be constructed by combining PREFIX
|
|
|
836 with the name of the existing coding system (if given), and a number
|
|
|
837 will be appended to insure uniqueness. In such a case, if Qunbound is
|
|
|
838 given for DESCRIPTION, the description gets created based on the
|
|
|
839 generated name. Also, if no mnemonic is given in the properties list, a
|
|
|
840 mnemonic is created based on the generated name.
|
|
|
841
|
|
|
842 For internal coding systems, the coding system is marked as internal
|
|
|
843 (see `coding-system-list'), and no subsidiaries will be created or
|
|
|
844 eol-wrapping will happen. Otherwise:
|
|
|
845
|
|
|
846 -- if the eol-type property is `lf' or t, the coding system is merely
|
|
|
847 created and returned. (For t, the coding system will be wrapped with
|
|
|
848 an EOL autodetector when it's used to read a file.)
|
|
|
849
|
|
|
850 -- if eol-type is `crlf' or `cr', after the coding system object is
|
|
|
851 created, it will be wrapped in a chain with the appropriate
|
|
|
852 convert-eol coding system (either `convert-eol-crlf' or
|
|
|
853 `convert-eol-cr'), so that CRLF->LF or CR->LF conversion is done at
|
|
|
854 decoding time, and the opposite at encoding time. The resulting
|
|
|
855 chain becomes the CANONICAL field of the coding system object.
|
|
|
856
|
|
|
857 -- if eol-type is nil or omitted, "subsidiaries" are generated: Three
|
|
|
858 coding systems where the original coding system (before wrapping with
|
|
|
859 convert-eol-autodetect) is either unwrapped or wrapped with
|
|
|
860 convert-eol-crlf or convert-eol-cr, respectively, so that coding systems
|
|
|
861 to handle LF, CRLF, and CR end-of-line indicators are created. (This
|
|
|
862 crazy crap is based on existing behavior in other Mule versions,
|
|
|
863 including FSF Emacs.)
|
|
|
864 */
|
|
428
|
865
|
|
|
866 static Lisp_Object
|
|
2367
|
867 make_coding_system_1 (Lisp_Object name_or_existing, Ascbyte *prefix,
|
|
771
|
868 Lisp_Object type, Lisp_Object description,
|
|
|
869 Lisp_Object props)
|
|
428
|
870 {
|
|
771
|
871 Lisp_Coding_System *cs;
|
|
|
872 int need_to_setup_eol_systems = 1;
|
|
|
873 enum eol_type eol_wrapper = EOL_AUTODETECT;
|
|
|
874 struct coding_system_methods *meths;
|
|
|
875 Lisp_Object csobj;
|
|
|
876 Lisp_Object defmnem = Qnil;
|
|
|
877
|
|
|
878 if (NILP (type))
|
|
|
879 type = Qundecided;
|
|
|
880 meths = decode_coding_system_type (type, ERROR_ME);
|
|
|
881
|
|
|
882 if (prefix)
|
|
428
|
883 {
|
|
867
|
884 Ibyte *newname =
|
|
771
|
885 emacs_sprintf_malloc (NULL, "%s-%s-%d",
|
|
|
886 prefix,
|
|
867
|
887 NILP (name_or_existing) ? (Ibyte *) "nil" :
|
|
771
|
888 XSTRING_DATA (Fsymbol_name (XCODING_SYSTEM_NAME
|
|
|
889 (name_or_existing))),
|
|
|
890 ++coding_system_tick);
|
|
|
891 name_or_existing = intern_int (newname);
|
|
1726
|
892 xfree (newname, Ibyte *);
|
|
771
|
893
|
|
|
894 if (UNBOUNDP (description))
|
|
|
895 {
|
|
|
896 newname =
|
|
|
897 emacs_sprintf_malloc
|
|
|
898 (NULL, "For Internal Use (%s)",
|
|
|
899 XSTRING_DATA (Fsymbol_name (name_or_existing)));
|
|
|
900 description = build_intstring (newname);
|
|
1726
|
901 xfree (newname, Ibyte *);
|
|
771
|
902 }
|
|
|
903
|
|
|
904 newname = emacs_sprintf_malloc (NULL, "Int%d", coding_system_tick);
|
|
|
905 defmnem = build_intstring (newname);
|
|
1726
|
906 xfree (newname, Ibyte *);
|
|
428
|
907 }
|
|
771
|
908 else
|
|
|
909 CHECK_SYMBOL (name_or_existing);
|
|
|
910
|
|
|
911 if (!NILP (Ffind_coding_system (name_or_existing)))
|
|
|
912 invalid_operation ("Cannot redefine existing coding system",
|
|
|
913 name_or_existing);
|
|
|
914
|
|
|
915 cs = allocate_coding_system (meths, meths->extra_data_size,
|
|
|
916 name_or_existing);
|
|
793
|
917 csobj = wrap_coding_system (cs);
|
|
771
|
918
|
|
|
919 cs->internal_p = !!prefix;
|
|
|
920
|
|
|
921 if (NILP (description))
|
|
|
922 description = build_string ("");
|
|
|
923 else
|
|
|
924 CHECK_STRING (description);
|
|
|
925 CODING_SYSTEM_DESCRIPTION (cs) = description;
|
|
|
926
|
|
|
927 if (!NILP (defmnem))
|
|
|
928 CODING_SYSTEM_MNEMONIC (cs) = defmnem;
|
|
|
929
|
|
|
930 {
|
|
|
931 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props)
|
|
|
932 {
|
|
|
933 int recognized = 1;
|
|
|
934
|
|
|
935 if (EQ (key, Qmnemonic))
|
|
|
936 {
|
|
|
937 if (!NILP (value))
|
|
|
938 CHECK_STRING (value);
|
|
|
939 CODING_SYSTEM_MNEMONIC (cs) = value;
|
|
|
940 }
|
|
|
941
|
|
|
942 else if (EQ (key, Qdocumentation))
|
|
|
943 {
|
|
|
944 if (!NILP (value))
|
|
|
945 CHECK_STRING (value);
|
|
|
946 CODING_SYSTEM_DOCUMENTATION (cs) = value;
|
|
|
947 }
|
|
|
948
|
|
|
949 else if (EQ (key, Qeol_type))
|
|
|
950 {
|
|
|
951 need_to_setup_eol_systems = NILP (value);
|
|
|
952 if (EQ (value, Qt))
|
|
|
953 value = Qnil;
|
|
|
954 eol_wrapper = symbol_to_eol_type (value);
|
|
|
955 }
|
|
|
956
|
|
|
957 else if (EQ (key, Qpost_read_conversion))
|
|
|
958 CODING_SYSTEM_POST_READ_CONVERSION (cs) = value;
|
|
|
959 else if (EQ (key, Qpre_write_conversion))
|
|
|
960 CODING_SYSTEM_PRE_WRITE_CONVERSION (cs) = value;
|
|
|
961 /* FSF compatibility */
|
|
|
962 else if (EQ (key, Qtranslation_table_for_decode))
|
|
|
963 ;
|
|
|
964 else if (EQ (key, Qtranslation_table_for_encode))
|
|
|
965 ;
|
|
|
966 else if (EQ (key, Qsafe_chars))
|
|
|
967 ;
|
|
|
968 else if (EQ (key, Qsafe_charsets))
|
|
|
969 ;
|
|
|
970 else if (EQ (key, Qmime_charset))
|
|
|
971 ;
|
|
|
972 else if (EQ (key, Qvalid_codes))
|
|
|
973 ;
|
|
|
974 else
|
|
|
975 recognized = CODESYSMETH_OR_GIVEN (cs, putprop,
|
|
|
976 (csobj, key, value), 0);
|
|
|
977
|
|
|
978 if (!recognized)
|
|
|
979 invalid_constant ("Unrecognized property", key);
|
|
|
980 }
|
|
|
981 }
|
|
|
982
|
|
|
983 {
|
|
|
984 XCODING_SYSTEM_CANONICAL (csobj) =
|
|
|
985 CODESYSMETH_OR_GIVEN (cs, canonicalize, (csobj), Qnil);
|
|
|
986 XCODING_SYSTEM_EOL_TYPE (csobj) = EOL_AUTODETECT; /* for copy-coding-system
|
|
|
987 below */
|
|
|
988
|
|
|
989 if (need_to_setup_eol_systems && !cs->internal_p)
|
|
|
990 setup_eol_coding_systems (csobj);
|
|
|
991 else if (eol_wrapper == EOL_CR || eol_wrapper == EOL_CRLF)
|
|
|
992 {
|
|
|
993 /* If a specific eol-type (other than LF) was specified, we handle
|
|
|
994 this by converting the coding system into a chain that wraps the
|
|
|
995 coding system along with a convert-eol system after it, in
|
|
|
996 exactly that same switcheroo fashion that the normal
|
|
|
997 canonicalize method works -- BUT we will run into a problem if
|
|
|
998 we do it the obvious way, because when `chain' creates its
|
|
|
999 substreams, the substream containing the coding system we're
|
|
|
1000 creating will have canonicalization expansion done on it,
|
|
|
1001 leading to infinite recursion. So we have to generate a new,
|
|
|
1002 internal coding system with the previous value of CANONICAL. */
|
|
867
|
1003 Ibyte *newname =
|
|
771
|
1004 emacs_sprintf_malloc
|
|
|
1005 (NULL, "internal-eol-copy-%s-%d",
|
|
|
1006 XSTRING_DATA (Fsymbol_name (name_or_existing)),
|
|
|
1007 ++coding_system_tick);
|
|
|
1008 Lisp_Object newnamesym = intern_int (newname);
|
|
|
1009 Lisp_Object copied = Fcopy_coding_system (csobj, newnamesym);
|
|
1726
|
1010 xfree (newname, Ibyte *);
|
|
771
|
1011
|
|
|
1012 XCODING_SYSTEM_CANONICAL (csobj) =
|
|
|
1013 make_internal_coding_system
|
|
|
1014 (csobj,
|
|
|
1015 "internal-eol-wrapper",
|
|
|
1016 Qchain, Qunbound,
|
|
|
1017 list4 (Qchain,
|
|
|
1018 list2 (copied,
|
|
|
1019 eol_wrapper == EOL_CR ?
|
|
|
1020 Qconvert_eol_cr :
|
|
|
1021 Qconvert_eol_crlf),
|
|
|
1022 Qcanonicalize_after_coding,
|
|
|
1023 csobj));
|
|
|
1024 }
|
|
|
1025 XCODING_SYSTEM_EOL_TYPE (csobj) = eol_wrapper;
|
|
|
1026 }
|
|
|
1027
|
|
|
1028 Fputhash (name_or_existing, csobj, Vcoding_system_hash_table);
|
|
|
1029
|
|
|
1030 return csobj;
|
|
428
|
1031 }
|
|
|
1032
|
|
771
|
1033 Lisp_Object
|
|
2367
|
1034 make_internal_coding_system (Lisp_Object existing, Ascbyte *prefix,
|
|
771
|
1035 Lisp_Object type, Lisp_Object description,
|
|
|
1036 Lisp_Object props)
|
|
|
1037 {
|
|
|
1038 return make_coding_system_1 (existing, prefix, type, description, props);
|
|
|
1039 }
|
|
428
|
1040
|
|
|
1041 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
1042 Register symbol NAME as a coding system.
|
|
|
1043
|
|
|
1044 TYPE describes the conversion method used and should be one of
|
|
|
1045
|
|
|
1046 nil or 'undecided
|
|
|
1047 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
1048 used in the file.
|
|
771
|
1049 'chain
|
|
|
1050 Chain two or more coding systems together to make a combination coding
|
|
|
1051 system.
|
|
428
|
1052 'no-conversion
|
|
|
1053 No conversion. Use this for binary files and such. On output,
|
|
|
1054 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
1055 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
1056 characters will only be present if you explicitly insert them.)
|
|
771
|
1057 'convert-eol
|
|
|
1058 Convert CRLF sequences or CR to LF.
|
|
428
|
1059 'shift-jis
|
|
|
1060 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
771
|
1061 'unicode
|
|
|
1062 Any Unicode encoding (UCS-4, UTF-8, UTF-16, etc.).
|
|
|
1063 'mswindows-unicode-to-multibyte
|
|
|
1064 (MS Windows only) Converts from Windows Unicode to Windows Multibyte
|
|
|
1065 (any code page encoding) upon encoding, and the other way upon decoding.
|
|
|
1066 'mswindows-multibyte
|
|
|
1067 Converts to or from Windows Multibyte (any code page encoding).
|
|
|
1068 This is resolved into a chain of `mswindows-unicode' and
|
|
|
1069 `mswindows-unicode-to-multibyte'.
|
|
428
|
1070 'iso2022
|
|
|
1071 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
1072 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
1073 standard Unix encoding for Japanese and other languages), and
|
|
|
1074 Compound Text (the encoding used in X11). You can specify more
|
|
442
|
1075 specific information about the conversion with the PROPS argument.
|
|
428
|
1076 'big5
|
|
|
1077 Big5 (the encoding commonly used for Taiwanese).
|
|
|
1078 'ccl
|
|
|
1079 The conversion is performed using a user-written pseudo-code
|
|
|
1080 program. CCL (Code Conversion Language) is the name of this
|
|
|
1081 pseudo-code.
|
|
771
|
1082 'gzip
|
|
|
1083 GZIP compression format.
|
|
428
|
1084 'internal
|
|
|
1085 Write out or read in the raw contents of the memory representing
|
|
|
1086 the buffer's text. This is primarily useful for debugging
|
|
|
1087 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
1088 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
1089 WARNING: Reading in a file using 'internal conversion can result
|
|
|
1090 in an internal inconsistency in the memory representing a
|
|
|
1091 buffer's text, which will produce unpredictable results and may
|
|
|
1092 cause XEmacs to crash. Under normal circumstances you should
|
|
|
1093 never use 'internal conversion.
|
|
|
1094
|
|
771
|
1095 DESCRIPTION is a short English phrase describing the coding system,
|
|
|
1096 suitable for use as a menu item. (See also the `documentation' property
|
|
|
1097 below.)
|
|
428
|
1098
|
|
|
1099 PROPS is a property list, describing the specific nature of the
|
|
|
1100 character set. Recognized properties are:
|
|
|
1101
|
|
|
1102 'mnemonic
|
|
|
1103 String to be displayed in the modeline when this coding system is
|
|
|
1104 active.
|
|
|
1105
|
|
771
|
1106 'documentation
|
|
|
1107 Detailed documentation on the coding system.
|
|
|
1108
|
|
428
|
1109 'eol-type
|
|
|
1110 End-of-line conversion to be used. It should be one of
|
|
|
1111
|
|
|
1112 nil
|
|
|
1113 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
1114 or CR). Also generate subsidiary coding systems named
|
|
|
1115 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
1116 identical to this coding system but have an EOL-TYPE
|
|
|
1117 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
1118 'lf
|
|
|
1119 The end of a line is marked externally using ASCII LF.
|
|
|
1120 Since this is also the way that XEmacs represents an
|
|
|
1121 end-of-line internally, specifying this option results
|
|
|
1122 in no end-of-line conversion. This is the standard
|
|
|
1123 format for Unix text files.
|
|
|
1124 'crlf
|
|
|
1125 The end of a line is marked externally using ASCII
|
|
|
1126 CRLF. This is the standard format for MS-DOS text
|
|
|
1127 files.
|
|
|
1128 'cr
|
|
|
1129 The end of a line is marked externally using ASCII CR.
|
|
|
1130 This is the standard format for Macintosh text files.
|
|
|
1131 t
|
|
|
1132 Automatically detect the end-of-line type but do not
|
|
|
1133 generate subsidiary coding systems. (This value is
|
|
|
1134 converted to nil when stored internally, and
|
|
|
1135 `coding-system-property' will return nil.)
|
|
|
1136
|
|
|
1137 'post-read-conversion
|
|
771
|
1138 The value is a function to call after some text is inserted and
|
|
|
1139 decoded by the coding system itself and before any functions in
|
|
|
1140 `after-change-functions' are called. (#### Not actually true in
|
|
|
1141 XEmacs. `after-change-functions' will be called twice if
|
|
|
1142 `post-read-conversion' changes something.) The argument of this
|
|
|
1143 function is the same as for a function in
|
|
|
1144 `after-insert-file-functions', i.e. LENGTH of the text inserted,
|
|
|
1145 with point at the head of the text to be decoded.
|
|
428
|
1146
|
|
|
1147 'pre-write-conversion
|
|
771
|
1148 The value is a function to call after all functions in
|
|
|
1149 `write-region-annotate-functions' and `buffer-file-format' are
|
|
|
1150 called, and before the text is encoded by the coding system itself.
|
|
|
1151 The arguments to this function are the same as those of a function
|
|
|
1152 in `write-region-annotate-functions', i.e. FROM and TO, specifying
|
|
|
1153 a region of text.
|
|
|
1154
|
|
|
1155
|
|
|
1156
|
|
|
1157 The following properties are allowed for FSF compatibility but currently
|
|
|
1158 ignored:
|
|
|
1159
|
|
|
1160 'translation-table-for-decode
|
|
|
1161 The value is a translation table to be applied on decoding. See
|
|
|
1162 the function `make-translation-table' for the format of translation
|
|
|
1163 table. This is not applicable to CCL-based coding systems.
|
|
|
1164
|
|
|
1165 'translation-table-for-encode
|
|
|
1166 The value is a translation table to be applied on encoding. This is
|
|
|
1167 not applicable to CCL-based coding systems.
|
|
|
1168
|
|
|
1169 'safe-chars
|
|
|
1170 The value is a char table. If a character has non-nil value in it,
|
|
|
1171 the character is safely supported by the coding system. This
|
|
|
1172 overrides the specification of safe-charsets.
|
|
|
1173
|
|
|
1174 'safe-charsets
|
|
|
1175 The value is a list of charsets safely supported by the coding
|
|
|
1176 system. The value t means that all charsets Emacs handles are
|
|
|
1177 supported. Even if some charset is not in this list, it doesn't
|
|
|
1178 mean that the charset can't be encoded in the coding system;
|
|
|
1179 it just means that some other receiver of text encoded
|
|
|
1180 in the coding system won't be able to handle that charset.
|
|
|
1181
|
|
|
1182 'mime-charset
|
|
|
1183 The value is a symbol of which name is `MIME-charset' parameter of
|
|
|
1184 the coding system.
|
|
|
1185
|
|
|
1186 'valid-codes (meaningful only for a coding system based on CCL)
|
|
|
1187 The value is a list to indicate valid byte ranges of the encoded
|
|
|
1188 file. Each element of the list is an integer or a cons of integer.
|
|
|
1189 In the former case, the integer value is a valid byte code. In the
|
|
|
1190 latter case, the integers specifies the range of valid byte codes.
|
|
|
1191
|
|
|
1192
|
|
|
1193
|
|
|
1194 The following additional property is recognized if TYPE is 'convert-eol:
|
|
|
1195
|
|
|
1196 'subtype
|
|
793
|
1197 One of `lf', `crlf', `cr' or nil (for autodetection). When decoding,
|
|
|
1198 the corresponding sequence will be converted to LF. When encoding,
|
|
|
1199 the opposite happens. This coding system converts characters to
|
|
771
|
1200 characters.
|
|
|
1201
|
|
428
|
1202
|
|
|
1203
|
|
|
1204 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
1205
|
|
|
1206 'charset-g0
|
|
|
1207 'charset-g1
|
|
|
1208 'charset-g2
|
|
|
1209 'charset-g3
|
|
|
1210 The character set initially designated to the G0 - G3 registers.
|
|
|
1211 The value should be one of
|
|
|
1212
|
|
|
1213 -- A charset object (designate that character set)
|
|
|
1214 -- nil (do not ever use this register)
|
|
|
1215 -- t (no character set is initially designated to
|
|
|
1216 the register, but may be later on; this automatically
|
|
|
1217 sets the corresponding `force-g*-on-output' property)
|
|
|
1218
|
|
|
1219 'force-g0-on-output
|
|
|
1220 'force-g1-on-output
|
|
|
1221 'force-g2-on-output
|
|
|
1222 'force-g2-on-output
|
|
|
1223 If non-nil, send an explicit designation sequence on output before
|
|
|
1224 using the specified register.
|
|
|
1225
|
|
|
1226 'short
|
|
|
1227 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
1228 "ESC $ B" on output in place of the full designation sequences
|
|
|
1229 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
|
1230
|
|
|
1231 'no-ascii-eol
|
|
|
1232 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
1233 Setting this to non-nil also suppresses other state-resetting that
|
|
|
1234 normally happens at the end of a line.
|
|
|
1235
|
|
|
1236 'no-ascii-cntl
|
|
|
1237 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
1238
|
|
|
1239 'seven
|
|
|
1240 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
1241 environment.
|
|
|
1242
|
|
|
1243 'lock-shift
|
|
|
1244 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
1245 or designation by escape sequence.
|
|
|
1246
|
|
|
1247 'no-iso6429
|
|
|
1248 If non-nil, don't use ISO6429's direction specification.
|
|
|
1249
|
|
|
1250 'escape-quoted
|
|
|
1251 If non-nil, literal control characters that are the same as
|
|
|
1252 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
1253 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
1254 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
|
1255 so that they can be properly distinguished from an escape sequence.
|
|
|
1256 (Note that doing this results in a non-portable encoding.) This
|
|
|
1257 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
1258 is a good choice for a quoting character because there are no
|
|
|
1259 escape sequences whose second byte is a character from the Control-0
|
|
|
1260 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
1261 ISO2022 standard.
|
|
|
1262
|
|
|
1263 'input-charset-conversion
|
|
|
1264 A list of conversion specifications, specifying conversion of
|
|
|
1265 characters in one charset to another when decoding is performed.
|
|
|
1266 Each specification is a list of two elements: the source charset,
|
|
|
1267 and the destination charset.
|
|
|
1268
|
|
|
1269 'output-charset-conversion
|
|
|
1270 A list of conversion specifications, specifying conversion of
|
|
|
1271 characters in one charset to another when encoding is performed.
|
|
|
1272 The form of each specification is the same as for
|
|
|
1273 'input-charset-conversion.
|
|
|
1274
|
|
|
1275
|
|
771
|
1276
|
|
428
|
1277 The following additional properties are recognized (and required)
|
|
|
1278 if TYPE is 'ccl:
|
|
|
1279
|
|
|
1280 'decode
|
|
|
1281 CCL program used for decoding (converting to internal format).
|
|
|
1282
|
|
|
1283 'encode
|
|
|
1284 CCL program used for encoding (converting to external format).
|
|
771
|
1285
|
|
|
1286
|
|
|
1287 The following additional properties are recognized if TYPE is 'chain:
|
|
|
1288
|
|
|
1289 'chain
|
|
|
1290 List of coding systems to be chained together, in decoding order.
|
|
|
1291
|
|
|
1292 'canonicalize-after-coding
|
|
|
1293 Coding system to be returned by the detector routines in place of
|
|
|
1294 this coding system.
|
|
|
1295
|
|
|
1296
|
|
|
1297
|
|
|
1298 The following additional properties are recognized if TYPE is 'unicode:
|
|
|
1299
|
|
|
1300 'type
|
|
|
1301 One of `utf-16', `utf-8', `ucs-4', or `utf-7' (the latter is not
|
|
|
1302 yet implemented). `utf-16' is the basic two-byte encoding;
|
|
|
1303 `ucs-4' is the four-byte encoding; `utf-8' is an ASCII-compatible
|
|
|
1304 variable-width 8-bit encoding; `utf-7' is a 7-bit encoding using
|
|
|
1305 only characters that will safely pass through all mail gateways.
|
|
2297
|
1306 [[ This should be \"transformation format\". There should also be
|
|
|
1307 `ucs-2' (or `bmp' -- no surrogates) and `utf-32' (range checked). ]]
|
|
771
|
1308
|
|
|
1309 'little-endian
|
|
|
1310 If non-nil, `utf-16' and `ucs-4' will write out the groups of two
|
|
|
1311 or four bytes little-endian instead of big-endian. This is required,
|
|
|
1312 for example, under Windows.
|
|
|
1313
|
|
|
1314 'need-bom
|
|
|
1315 If non-nil, a byte order mark (BOM, or Unicode FFFE) should be
|
|
|
1316 written out at the beginning of the data. This serves both to
|
|
|
1317 identify the endianness of the following data and to mark the
|
|
|
1318 data as Unicode (at least, this is how Windows uses it).
|
|
2297
|
1319 [[ The correct term is \"signature\", since this technique may also
|
|
|
1320 be used with UTF-8. That is the term used in the standard. ]]
|
|
771
|
1321
|
|
|
1322
|
|
|
1323 The following additional properties are recognized if TYPE is
|
|
|
1324 'mswindows-multibyte:
|
|
|
1325
|
|
|
1326 'code-page
|
|
|
1327 Either a number (specifying a particular code page) or one of the
|
|
|
1328 symbols `ansi', `oem', `mac', or `ebcdic', specifying the ANSI,
|
|
|
1329 OEM, Macintosh, or EBCDIC code page associated with a particular
|
|
|
1330 locale (given by the `locale' property). NOTE: EBCDIC code pages
|
|
|
1331 only exist in Windows 2000 and later.
|
|
|
1332
|
|
|
1333 'locale
|
|
|
1334 If `code-page' is a symbol, this specifies the locale whose code
|
|
|
1335 page of the corresponding type should be used. This should be
|
|
|
1336 one of the following: A cons of two strings, (LANGUAGE
|
|
|
1337 . SUBLANGUAGE) (see `mswindows-set-current-locale'); a string (a
|
|
|
1338 language; SUBLANG_DEFAULT, i.e. the default sublanguage, is
|
|
|
1339 used); or one of the symbols `current', `user-default', or
|
|
|
1340 `system-default', corresponding to the values of
|
|
|
1341 `mswindows-current-locale', `mswindows-user-default-locale', or
|
|
|
1342 `mswindows-system-default-locale', respectively.
|
|
|
1343
|
|
|
1344
|
|
|
1345
|
|
|
1346 The following additional properties are recognized if TYPE is 'undecided:
|
|
2297
|
1347 [[ Doesn't GNU use \"detect-*\" for the following two? ]]
|
|
771
|
1348
|
|
|
1349 'do-eol
|
|
|
1350 Do EOL detection.
|
|
|
1351
|
|
|
1352 'do-coding
|
|
|
1353 Do encoding detection.
|
|
|
1354
|
|
|
1355 'coding-system
|
|
|
1356 If encoding detection is not done, use the specified coding system
|
|
|
1357 to do decoding. This is used internally when implementing coding
|
|
|
1358 systems with an EOL type that specifies autodetection (the default),
|
|
|
1359 so that the detector routines return the proper subsidiary.
|
|
|
1360
|
|
|
1361
|
|
|
1362
|
|
|
1363 The following additional property is recognized if TYPE is 'gzip:
|
|
|
1364
|
|
|
1365 'level
|
|
|
1366 Compression level: 0 through 9, or `default' (currently 6).
|
|
|
1367
|
|
428
|
1368 */
|
|
771
|
1369 (name, type, description, props))
|
|
428
|
1370 {
|
|
771
|
1371 return make_coding_system_1 (name, 0, type, description, props);
|
|
428
|
1372 }
|
|
|
1373
|
|
|
1374 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
1375 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
1376 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
1377 be created.
|
|
771
|
1378 If you are using this function to create an alias, think again:
|
|
|
1379 Use `define-coding-system-alias' instead.
|
|
428
|
1380 */
|
|
|
1381 (old_coding_system, new_name))
|
|
|
1382 {
|
|
|
1383 Lisp_Object new_coding_system;
|
|
|
1384 old_coding_system = Fget_coding_system (old_coding_system);
|
|
771
|
1385 new_coding_system =
|
|
|
1386 UNBOUNDP (new_name) ? Qnil : Ffind_coding_system (new_name);
|
|
428
|
1387 if (NILP (new_coding_system))
|
|
|
1388 {
|
|
793
|
1389 new_coding_system =
|
|
|
1390 wrap_coding_system
|
|
|
1391 (allocate_coding_system
|
|
|
1392 (XCODING_SYSTEM (old_coding_system)->methods,
|
|
|
1393 XCODING_SYSTEM (old_coding_system)->methods->extra_data_size,
|
|
|
1394 new_name));
|
|
771
|
1395 if (!UNBOUNDP (new_name))
|
|
|
1396 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
|
428
|
1397 }
|
|
771
|
1398 else if (XCODING_SYSTEM (old_coding_system)->methods !=
|
|
|
1399 XCODING_SYSTEM (new_coding_system)->methods)
|
|
|
1400 invalid_operation_2 ("Coding systems not same type",
|
|
|
1401 old_coding_system, new_coding_system);
|
|
428
|
1402
|
|
|
1403 {
|
|
|
1404 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
1405 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
771
|
1406 copy_sized_lcrecord (to, from, sizeof_coding_system (from));
|
|
428
|
1407 to->name = new_name;
|
|
|
1408 }
|
|
|
1409 return new_coding_system;
|
|
|
1410 }
|
|
|
1411
|
|
771
|
1412 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p,
|
|
|
1413 1, 1, 0, /*
|
|
440
|
1414 Return t if OBJECT names a coding system, and is not a coding system alias.
|
|
428
|
1415 */
|
|
440
|
1416 (object))
|
|
|
1417 {
|
|
|
1418 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil))
|
|
|
1419 ? Qt : Qnil;
|
|
|
1420 }
|
|
|
1421
|
|
2297
|
1422 /* #### Shouldn't this really be a find/get pair? */
|
|
|
1423
|
|
440
|
1424 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /*
|
|
|
1425 Return t if OBJECT is a coding system alias.
|
|
|
1426 All coding system aliases are created by `define-coding-system-alias'.
|
|
|
1427 */
|
|
|
1428 (object))
|
|
428
|
1429 {
|
|
440
|
1430 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero))
|
|
|
1431 ? Qt : Qnil;
|
|
|
1432 }
|
|
|
1433
|
|
|
1434 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /*
|
|
|
1435 Return the coding-system symbol for which symbol ALIAS is an alias.
|
|
|
1436 */
|
|
|
1437 (alias))
|
|
|
1438 {
|
|
|
1439 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil);
|
|
|
1440 if (SYMBOLP (aliasee))
|
|
|
1441 return aliasee;
|
|
|
1442 else
|
|
563
|
1443 invalid_argument ("Symbol is not a coding system alias", alias);
|
|
1204
|
1444 RETURN_NOT_REACHED (Qnil);
|
|
440
|
1445 }
|
|
|
1446
|
|
|
1447 /* A maphash function, for removing dangling coding system aliases. */
|
|
|
1448 static int
|
|
2286
|
1449 dangling_coding_system_alias_p (Lisp_Object UNUSED (alias),
|
|
440
|
1450 Lisp_Object aliasee,
|
|
|
1451 void *dangling_aliases)
|
|
|
1452 {
|
|
|
1453 if (SYMBOLP (aliasee)
|
|
|
1454 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil)))
|
|
428
|
1455 {
|
|
440
|
1456 (*(int *) dangling_aliases)++;
|
|
|
1457 return 1;
|
|
428
|
1458 }
|
|
440
|
1459 else
|
|
|
1460 return 0;
|
|
|
1461 }
|
|
|
1462
|
|
|
1463 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
|
1464 Define symbol ALIAS as an alias for coding system ALIASEE.
|
|
|
1465
|
|
|
1466 You can use this function to redefine an alias that has already been defined,
|
|
|
1467 but you cannot redefine a name which is the canonical name for a coding system.
|
|
|
1468 \(a canonical name of a coding system is what is returned when you call
|
|
|
1469 `coding-system-name' on a coding system).
|
|
|
1470
|
|
|
1471 ALIASEE itself can be an alias, which allows you to define nested aliases.
|
|
|
1472
|
|
|
1473 You are forbidden, however, from creating alias loops or `dangling' aliases.
|
|
|
1474 These will be detected, and an error will be signaled if you attempt to do so.
|
|
|
1475
|
|
|
1476 If ALIASEE is nil, then ALIAS will simply be undefined.
|
|
|
1477
|
|
|
1478 See also `coding-system-alias-p', `coding-system-aliasee',
|
|
|
1479 and `coding-system-canonical-name-p'.
|
|
|
1480 */
|
|
|
1481 (alias, aliasee))
|
|
|
1482 {
|
|
2286
|
1483 Lisp_Object probe;
|
|
440
|
1484
|
|
|
1485 CHECK_SYMBOL (alias);
|
|
|
1486
|
|
|
1487 if (!NILP (Fcoding_system_canonical_name_p (alias)))
|
|
563
|
1488 invalid_change
|
|
440
|
1489 ("Symbol is the canonical name of a coding system and cannot be redefined",
|
|
|
1490 alias);
|
|
|
1491
|
|
|
1492 if (NILP (aliasee))
|
|
|
1493 {
|
|
771
|
1494 Lisp_Object subsidiary_unix = add_suffix_to_symbol (alias, "-unix");
|
|
|
1495 Lisp_Object subsidiary_dos = add_suffix_to_symbol (alias, "-dos");
|
|
|
1496 Lisp_Object subsidiary_mac = add_suffix_to_symbol (alias, "-mac");
|
|
440
|
1497
|
|
|
1498 Fremhash (alias, Vcoding_system_hash_table);
|
|
|
1499
|
|
|
1500 /* Undefine subsidiary aliases,
|
|
|
1501 presumably created by a previous call to this function */
|
|
|
1502 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) &&
|
|
|
1503 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) &&
|
|
|
1504 ! NILP (Fcoding_system_alias_p (subsidiary_mac)))
|
|
|
1505 {
|
|
|
1506 Fdefine_coding_system_alias (subsidiary_unix, Qnil);
|
|
|
1507 Fdefine_coding_system_alias (subsidiary_dos, Qnil);
|
|
|
1508 Fdefine_coding_system_alias (subsidiary_mac, Qnil);
|
|
|
1509 }
|
|
|
1510
|
|
|
1511 /* Undefine dangling coding system aliases. */
|
|
|
1512 {
|
|
|
1513 int dangling_aliases;
|
|
|
1514
|
|
|
1515 do {
|
|
|
1516 dangling_aliases = 0;
|
|
|
1517 elisp_map_remhash (dangling_coding_system_alias_p,
|
|
|
1518 Vcoding_system_hash_table,
|
|
|
1519 &dangling_aliases);
|
|
|
1520 } while (dangling_aliases > 0);
|
|
|
1521 }
|
|
|
1522
|
|
|
1523 return Qnil;
|
|
|
1524 }
|
|
|
1525
|
|
|
1526 if (CODING_SYSTEMP (aliasee))
|
|
|
1527 aliasee = XCODING_SYSTEM_NAME (aliasee);
|
|
|
1528
|
|
|
1529 /* Checks that aliasee names a coding-system */
|
|
2286
|
1530 (void) Fget_coding_system (aliasee);
|
|
440
|
1531
|
|
|
1532 /* Check for coding system alias loops */
|
|
|
1533 if (EQ (alias, aliasee))
|
|
563
|
1534 alias_loop: invalid_operation_2
|
|
440
|
1535 ("Attempt to create a coding system alias loop", alias, aliasee);
|
|
|
1536
|
|
|
1537 for (probe = aliasee;
|
|
|
1538 SYMBOLP (probe);
|
|
|
1539 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero))
|
|
|
1540 {
|
|
|
1541 if (EQ (probe, alias))
|
|
|
1542 goto alias_loop;
|
|
|
1543 }
|
|
|
1544
|
|
|
1545 Fputhash (alias, aliasee, Vcoding_system_hash_table);
|
|
|
1546
|
|
|
1547 /* Set up aliases for subsidiaries.
|
|
2297
|
1548 #### There must be a better way to handle subsidiary coding systems.
|
|
|
1549 Inquiring Minds Want To Know: shouldn't they always be chains? */
|
|
440
|
1550 {
|
|
|
1551 static const char *suffixes[] = { "-unix", "-dos", "-mac" };
|
|
|
1552 int i;
|
|
|
1553 for (i = 0; i < countof (suffixes); i++)
|
|
|
1554 {
|
|
|
1555 Lisp_Object alias_subsidiary =
|
|
771
|
1556 add_suffix_to_symbol (alias, suffixes[i]);
|
|
440
|
1557 Lisp_Object aliasee_subsidiary =
|
|
771
|
1558 add_suffix_to_symbol (aliasee, suffixes[i]);
|
|
440
|
1559
|
|
|
1560 if (! NILP (Ffind_coding_system (aliasee_subsidiary)))
|
|
|
1561 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary);
|
|
|
1562 }
|
|
|
1563 }
|
|
428
|
1564 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
|
|
|
1565 but it doesn't look intentional, so I'd rather return something
|
|
|
1566 meaningful or nothing at all. */
|
|
|
1567 return Qnil;
|
|
|
1568 }
|
|
|
1569
|
|
|
1570 static Lisp_Object
|
|
771
|
1571 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
|
428
|
1572 {
|
|
|
1573 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
1574 Lisp_Object new_coding_system;
|
|
|
1575
|
|
|
1576 switch (type)
|
|
|
1577 {
|
|
|
1578 case EOL_AUTODETECT: return coding_system;
|
|
|
1579 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
1580 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
1581 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
442
|
1582 default: abort (); return Qnil;
|
|
428
|
1583 }
|
|
|
1584
|
|
|
1585 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
1586 }
|
|
|
1587
|
|
|
1588 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
1589 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
771
|
1590 The logically opposite operation is `coding-system-base'.
|
|
428
|
1591 */
|
|
|
1592 (coding_system, eol_type))
|
|
|
1593 {
|
|
771
|
1594 coding_system = get_coding_system_for_text_file (coding_system, 0);
|
|
428
|
1595
|
|
|
1596 return subsidiary_coding_system (coding_system,
|
|
|
1597 symbol_to_eol_type (eol_type));
|
|
|
1598 }
|
|
|
1599
|
|
771
|
1600 DEFUN ("coding-system-base", Fcoding_system_base,
|
|
|
1601 1, 1, 0, /*
|
|
|
1602 Return the base coding system of CODING-SYSTEM.
|
|
|
1603 If CODING-SYSTEM is a subsidiary, this returns its parent; otherwise, it
|
|
|
1604 returns CODING-SYSTEM.
|
|
|
1605 The logically opposite operation is `subsidiary-coding-system'.
|
|
|
1606 */
|
|
|
1607 (coding_system))
|
|
|
1608 {
|
|
|
1609 Lisp_Object base;
|
|
|
1610
|
|
|
1611 coding_system = Fget_coding_system (coding_system);
|
|
|
1612 if (EQ (XCODING_SYSTEM_NAME (coding_system), Qbinary))
|
|
|
1613 return Fget_coding_system (Qraw_text); /* hack! */
|
|
|
1614 base = XCODING_SYSTEM_SUBSIDIARY_PARENT (coding_system);
|
|
|
1615 if (!NILP (base))
|
|
|
1616 return base;
|
|
|
1617 return coding_system;
|
|
|
1618 }
|
|
|
1619
|
|
|
1620 DEFUN ("coding-system-used-for-io", Fcoding_system_used_for_io,
|
|
|
1621 1, 1, 0, /*
|
|
|
1622 Return the coding system actually used for I/O.
|
|
|
1623 In some cases (e.g. when a particular EOL type is specified) this won't be
|
|
2297
|
1624 the coding system itself. This can be useful when trying to determine
|
|
|
1625 precisely how data was decoded.
|
|
771
|
1626 */
|
|
|
1627 (coding_system))
|
|
|
1628 {
|
|
|
1629 Lisp_Object canon;
|
|
|
1630
|
|
|
1631 coding_system = Fget_coding_system (coding_system);
|
|
|
1632 canon = XCODING_SYSTEM_CANONICAL (coding_system);
|
|
|
1633 if (!NILP (canon))
|
|
|
1634 return canon;
|
|
|
1635 return coding_system;
|
|
|
1636 }
|
|
|
1637
|
|
428
|
1638
|
|
|
1639 /************************************************************************/
|
|
|
1640 /* Coding system accessors */
|
|
|
1641 /************************************************************************/
|
|
|
1642
|
|
771
|
1643 DEFUN ("coding-system-description", Fcoding_system_description, 1, 1, 0, /*
|
|
|
1644 Return the description for CODING-SYSTEM.
|
|
|
1645 The `description' of a coding system is a short English phrase giving the
|
|
|
1646 name rendered according to English punctuation rules, plus possibly some
|
|
|
1647 explanatory text (typically in the form of a parenthetical phrase). The
|
|
|
1648 description is intended to be short enough that it can appear as a menu item,
|
|
|
1649 and clear enough to be recognizable even to someone who is assumed to have
|
|
|
1650 some basic familiarity with different encodings but may not know all the
|
|
|
1651 technical names; thus, for `cn-gb-2312' is described as "Chinese EUC" and
|
|
|
1652 `hz-gb-2312' is described as "Hz/ZW (Chinese)", where the actual name of
|
|
|
1653 the encoding is given, followed by a note that this is a Chinese encoding,
|
|
|
1654 because the great majority of people encountering this would have no idea
|
|
|
1655 what it is, and giving the language indicates whether the encoding should
|
|
|
1656 just be ignored or (conceivably) investigated more thoroughly.
|
|
428
|
1657 */
|
|
|
1658 (coding_system))
|
|
|
1659 {
|
|
|
1660 coding_system = Fget_coding_system (coding_system);
|
|
771
|
1661 return XCODING_SYSTEM_DESCRIPTION (coding_system);
|
|
428
|
1662 }
|
|
|
1663
|
|
|
1664 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
1665 Return the type of CODING-SYSTEM.
|
|
|
1666 */
|
|
|
1667 (coding_system))
|
|
|
1668 {
|
|
771
|
1669 coding_system = Fget_coding_system (coding_system);
|
|
|
1670 return XCODING_SYSTEM_TYPE (coding_system);
|
|
428
|
1671 }
|
|
|
1672
|
|
|
1673 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
1674 Return the PROP property of CODING-SYSTEM.
|
|
|
1675 */
|
|
|
1676 (coding_system, prop))
|
|
|
1677 {
|
|
|
1678 coding_system = Fget_coding_system (coding_system);
|
|
|
1679 CHECK_SYMBOL (prop);
|
|
|
1680
|
|
|
1681 if (EQ (prop, Qname))
|
|
|
1682 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1683 else if (EQ (prop, Qtype))
|
|
|
1684 return Fcoding_system_type (coding_system);
|
|
771
|
1685 else if (EQ (prop, Qdescription))
|
|
|
1686 return XCODING_SYSTEM_DESCRIPTION (coding_system);
|
|
428
|
1687 else if (EQ (prop, Qmnemonic))
|
|
|
1688 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
771
|
1689 else if (EQ (prop, Qdocumentation))
|
|
|
1690 return XCODING_SYSTEM_DOCUMENTATION (coding_system);
|
|
428
|
1691 else if (EQ (prop, Qeol_type))
|
|
771
|
1692 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE
|
|
|
1693 (coding_system));
|
|
428
|
1694 else if (EQ (prop, Qeol_lf))
|
|
|
1695 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1696 else if (EQ (prop, Qeol_crlf))
|
|
|
1697 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1698 else if (EQ (prop, Qeol_cr))
|
|
|
1699 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1700 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1701 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1702 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1703 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
771
|
1704 else
|
|
|
1705 {
|
|
|
1706 Lisp_Object value = CODESYSMETH_OR_GIVEN (XCODING_SYSTEM (coding_system),
|
|
|
1707 getprop,
|
|
|
1708 (coding_system, prop),
|
|
|
1709 Qunbound);
|
|
|
1710 if (UNBOUNDP (value))
|
|
|
1711 invalid_constant ("Unrecognized property", prop);
|
|
|
1712 return value;
|
|
|
1713 }
|
|
|
1714 }
|
|
|
1715
|
|
|
1716
|
|
|
1717 /************************************************************************/
|
|
|
1718 /* Coding stream functions */
|
|
|
1719 /************************************************************************/
|
|
|
1720
|
|
|
1721 /* A coding stream is a stream used for encoding or decoding text. The
|
|
|
1722 coding-stream object keeps track of the actual coding system, the stream
|
|
|
1723 that is at the other end, and data that needs to be persistent across
|
|
|
1724 the lifetime of the stream. */
|
|
|
1725
|
|
1204
|
1726 extern const struct sized_memory_description chain_coding_stream_description;
|
|
|
1727 extern const struct sized_memory_description undecided_coding_stream_description;
|
|
|
1728
|
|
|
1729 static const struct memory_description coding_stream_data_description_1 []= {
|
|
2367
|
1730 { XD_BLOCK_PTR, chain_coding_system, 1, &chain_coding_stream_description},
|
|
|
1731 { XD_BLOCK_PTR, undecided_coding_system, 1, &undecided_coding_stream_description},
|
|
1204
|
1732 { XD_END }
|
|
|
1733 };
|
|
|
1734
|
|
|
1735 static const struct sized_memory_description coding_stream_data_description = {
|
|
|
1736 sizeof (void *), coding_stream_data_description_1
|
|
|
1737 };
|
|
|
1738
|
|
|
1739 static const struct memory_description coding_lstream_description[] = {
|
|
|
1740 { XD_INT, offsetof (struct coding_stream, type) },
|
|
|
1741 { XD_LISP_OBJECT, offsetof (struct coding_stream, orig_codesys) },
|
|
|
1742 { XD_LISP_OBJECT, offsetof (struct coding_stream, codesys) },
|
|
|
1743 { XD_LISP_OBJECT, offsetof (struct coding_stream, other_end) },
|
|
|
1744 { XD_UNION, offsetof (struct coding_stream, data),
|
|
|
1745 XD_INDIRECT (0, 0), &coding_stream_data_description },
|
|
|
1746 { XD_END }
|
|
|
1747 };
|
|
|
1748
|
|
|
1749 DEFINE_LSTREAM_IMPLEMENTATION_WITH_DATA ("coding", coding);
|
|
771
|
1750
|
|
|
1751 /* Encoding and decoding are parallel operations, so we create just one
|
|
|
1752 stream for both. "Decoding" may involve the extra step of autodetection
|
|
|
1753 of the data format, but that's only because of the conventional
|
|
|
1754 definition of decoding as converting from external- to
|
|
|
1755 internal-formatted data.
|
|
|
1756
|
|
2297
|
1757 [[ REWRITE ME! ]]
|
|
|
1758
|
|
771
|
1759 #### We really need to abstract out the concept of "data formats" and
|
|
|
1760 define "converters" that convert from and to specified formats,
|
|
|
1761 eliminating the idea of decoding and encoding. When specifying a
|
|
|
1762 conversion process, we need to give the data formats themselves, not the
|
|
|
1763 conversion processes -- e.g. a coding system called "Unicode->multibyte"
|
|
|
1764 converts in both directions, and we could auto-detect the format of data
|
|
|
1765 at either end. */
|
|
|
1766
|
|
|
1767 static Bytecount
|
|
|
1768 coding_reader (Lstream *stream, unsigned char *data, Bytecount size)
|
|
|
1769 {
|
|
|
1770 unsigned char *orig_data = data;
|
|
|
1771 Bytecount read_size;
|
|
|
1772 int error_occurred = 0;
|
|
|
1773 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
1774
|
|
|
1775 /* We need to interface to coding_{de,en}code_1(), which expects to take
|
|
|
1776 some amount of data and store the result into a Dynarr. We have
|
|
|
1777 coding_{de,en}code_1() store into c->runoff, and take data from there
|
|
|
1778 as necessary. */
|
|
|
1779
|
|
|
1780 /* We loop until we have enough data, reading chunks from the other
|
|
|
1781 end and converting it. */
|
|
|
1782 while (1)
|
|
|
1783 {
|
|
|
1784 /* Take data from convert_to if we can. Make sure to take at
|
|
|
1785 most SIZE bytes, and delete the data from convert_to. */
|
|
|
1786 if (Dynarr_length (str->convert_to) > 0)
|
|
|
1787 {
|
|
|
1788 Bytecount chunk =
|
|
|
1789 min (size, (Bytecount) Dynarr_length (str->convert_to));
|
|
|
1790 memcpy (data, Dynarr_atp (str->convert_to, 0), chunk);
|
|
|
1791 Dynarr_delete_many (str->convert_to, 0, chunk);
|
|
|
1792 data += chunk;
|
|
|
1793 size -= chunk;
|
|
|
1794 }
|
|
|
1795
|
|
|
1796 if (size == 0)
|
|
|
1797 break; /* No more room for data */
|
|
|
1798
|
|
|
1799 if (str->eof)
|
|
|
1800 break;
|
|
|
1801
|
|
|
1802 {
|
|
|
1803 /* Exhausted convert_to, so get some more. Read into convert_from,
|
|
|
1804 after existing "rejected" data from the last conversion. */
|
|
|
1805 Bytecount rejected = Dynarr_length (str->convert_from);
|
|
|
1806 /* #### 1024 is arbitrary; we really need to separate 0 from EOF,
|
|
|
1807 and when we get 0, keep taking more data until we don't get 0 --
|
|
|
1808 we don't know how much data the conversion routine might need
|
|
2297
|
1809 before it can generate any data of its own (eg, bzip2). */
|
|
814
|
1810 Bytecount readmore =
|
|
|
1811 str->one_byte_at_a_time ? (Bytecount) 1 :
|
|
|
1812 max (size, (Bytecount) 1024);
|
|
771
|
1813
|
|
|
1814 Dynarr_add_many (str->convert_from, 0, readmore);
|
|
|
1815 read_size = Lstream_read (str->other_end,
|
|
|
1816 Dynarr_atp (str->convert_from, rejected),
|
|
|
1817 readmore);
|
|
|
1818 /* Trim size down to how much we actually got */
|
|
|
1819 Dynarr_set_size (str->convert_from, rejected + max (0, read_size));
|
|
|
1820 }
|
|
|
1821
|
|
|
1822 if (read_size < 0) /* LSTREAM_ERROR */
|
|
|
1823 {
|
|
|
1824 error_occurred = 1;
|
|
|
1825 break;
|
|
|
1826 }
|
|
|
1827 if (read_size == 0) /* LSTREAM_EOF */
|
|
|
1828 /* There might be some more end data produced in the translation,
|
|
|
1829 so we set a flag and call the conversion method once more to
|
|
|
1830 output any final stuff it may be holding, any "go back to a sane
|
|
|
1831 state" escape sequences, etc. The conversion method is free to
|
|
|
1832 look at this flag, and we use it above to stop looping. */
|
|
|
1833 str->eof = 1;
|
|
|
1834 {
|
|
|
1835 Bytecount processed;
|
|
|
1836 Bytecount to_process = Dynarr_length (str->convert_from);
|
|
|
1837
|
|
|
1838 /* Convert the data, and save any rejected data in convert_from */
|
|
|
1839 processed =
|
|
|
1840 XCODESYSMETH (str->codesys, convert,
|
|
|
1841 (str, Dynarr_atp (str->convert_from, 0),
|
|
|
1842 str->convert_to, to_process));
|
|
|
1843 if (processed < 0)
|
|
|
1844 {
|
|
|
1845 error_occurred = 1;
|
|
|
1846 break;
|
|
|
1847 }
|
|
|
1848 assert (processed <= to_process);
|
|
|
1849 if (processed < to_process)
|
|
|
1850 memmove (Dynarr_atp (str->convert_from, 0),
|
|
|
1851 Dynarr_atp (str->convert_from, processed),
|
|
|
1852 to_process - processed);
|
|
|
1853 Dynarr_set_size (str->convert_from, to_process - processed);
|
|
|
1854 }
|
|
|
1855 }
|
|
|
1856
|
|
|
1857 if (data - orig_data == 0)
|
|
|
1858 return error_occurred ? -1 : 0;
|
|
|
1859 else
|
|
|
1860 return data - orig_data;
|
|
|
1861 }
|
|
|
1862
|
|
|
1863 static Bytecount
|
|
|
1864 coding_writer (Lstream *stream, const unsigned char *data, Bytecount size)
|
|
|
1865 {
|
|
|
1866 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
1867
|
|
|
1868 /* Convert all our data into convert_to, and then attempt to write
|
|
|
1869 it all out to the other end. */
|
|
|
1870 Dynarr_reset (str->convert_to);
|
|
|
1871 size = XCODESYSMETH (str->codesys, convert,
|
|
|
1872 (str, data, str->convert_to, size));
|
|
|
1873 if (Lstream_write (str->other_end, Dynarr_atp (str->convert_to, 0),
|
|
|
1874 Dynarr_length (str->convert_to)) < 0)
|
|
|
1875 return -1;
|
|
|
1876 else
|
|
|
1877 /* The return value indicates how much of the incoming data was
|
|
|
1878 processed, not how many bytes were written. */
|
|
|
1879 return size;
|
|
|
1880 }
|
|
|
1881
|
|
|
1882 static int
|
|
|
1883 encode_decode_source_sink_type_is_char (Lisp_Object cs,
|
|
|
1884 enum source_or_sink sex,
|
|
|
1885 enum encode_decode direction)
|
|
|
1886 {
|
|
|
1887 return (direction == CODING_DECODE ?
|
|
|
1888 decoding_source_sink_type_is_char (cs, sex) :
|
|
|
1889 encoding_source_sink_type_is_char (cs, sex));
|
|
|
1890 }
|
|
|
1891
|
|
|
1892 /* Ensure that the convert methods only get full characters sent to them to
|
|
|
1893 convert if the source of that conversion is characters; and that no such
|
|
|
1894 full-character checking happens when the source is bytes. Keep in mind
|
|
|
1895 that (1) the conversion_end_type return values take the perspective of
|
|
|
1896 encoding; (2) the source for decoding is the same as the sink for
|
|
|
1897 encoding; (3) when writing, the data is given to us, and we set our own
|
|
|
1898 stream to be character mode or not; (4) when reading, the data comes
|
|
|
1899 from the other_end stream, and we set that one to be character mode or
|
|
|
1900 not. This is consistent with the comment above the prototype for
|
|
|
1901 Lstream_set_character_mode(), which lays out rules for who is allowed to
|
|
|
1902 modify the character type mode on a stream.
|
|
|
1903
|
|
814
|
1904 If we're a read stream, we're always setting character mode on the
|
|
|
1905 source, but we also set it on ourselves consistent with the flag that
|
|
|
1906 can disable this (see again the comment above
|
|
|
1907 Lstream_set_character_mode()).
|
|
|
1908 */
|
|
771
|
1909
|
|
|
1910 static void
|
|
|
1911 set_coding_character_mode (Lstream *stream)
|
|
|
1912 {
|
|
|
1913 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
1914 Lstream *stream_to_set =
|
|
|
1915 stream->flags & LSTREAM_FL_WRITE ? stream : str->other_end;
|
|
|
1916 if (encode_decode_source_sink_type_is_char
|
|
|
1917 (str->codesys, CODING_SOURCE, str->direction))
|
|
|
1918 Lstream_set_character_mode (stream_to_set);
|
|
|
1919 else
|
|
|
1920 Lstream_unset_character_mode (stream_to_set);
|
|
814
|
1921 if (str->set_char_mode_on_us_when_reading &&
|
|
|
1922 (stream->flags & LSTREAM_FL_READ))
|
|
|
1923 {
|
|
|
1924 if (encode_decode_source_sink_type_is_char
|
|
|
1925 (str->codesys, CODING_SINK, str->direction))
|
|
|
1926 Lstream_set_character_mode (stream);
|
|
|
1927 else
|
|
|
1928 Lstream_unset_character_mode (stream);
|
|
|
1929 }
|
|
771
|
1930 }
|
|
|
1931
|
|
|
1932 static Lisp_Object
|
|
|
1933 coding_marker (Lisp_Object stream)
|
|
|
1934 {
|
|
|
1935 struct coding_stream *str = CODING_STREAM_DATA (XLSTREAM (stream));
|
|
|
1936
|
|
|
1937 mark_object (str->orig_codesys);
|
|
|
1938 mark_object (str->codesys);
|
|
|
1939 MAYBE_XCODESYSMETH (str->codesys, mark_coding_stream, (str));
|
|
|
1940 return wrap_lstream (str->other_end);
|
|
|
1941 }
|
|
|
1942
|
|
|
1943 static int
|
|
|
1944 coding_rewinder (Lstream *stream)
|
|
|
1945 {
|
|
|
1946 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
1947 MAYBE_XCODESYSMETH (str->codesys, rewind_coding_stream, (str));
|
|
|
1948
|
|
|
1949 str->ch = 0;
|
|
|
1950 Dynarr_reset (str->convert_to);
|
|
|
1951 Dynarr_reset (str->convert_from);
|
|
|
1952 return Lstream_rewind (str->other_end);
|
|
|
1953 }
|
|
|
1954
|
|
|
1955 static int
|
|
|
1956 coding_seekable_p (Lstream *stream)
|
|
|
1957 {
|
|
|
1958 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
1959 return Lstream_seekable_p (str->other_end);
|
|
|
1960 }
|
|
|
1961
|
|
|
1962 static int
|
|
|
1963 coding_flusher (Lstream *stream)
|
|
|
1964 {
|
|
|
1965 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
1966 return Lstream_flush (str->other_end);
|
|
|
1967 }
|
|
|
1968
|
|
|
1969 static int
|
|
|
1970 coding_closer (Lstream *stream)
|
|
|
1971 {
|
|
|
1972 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
1973 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
1974 {
|
|
|
1975 str->eof = 1;
|
|
|
1976 coding_writer (stream, 0, 0);
|
|
|
1977 str->eof = 0;
|
|
|
1978 }
|
|
|
1979 /* It's safe to free the runoff dynarrs now because they are used only
|
|
|
1980 during conversion. We need to keep the type-specific data around,
|
|
|
1981 though, because of canonicalize_after_coding. */
|
|
|
1982 if (str->convert_to)
|
|
|
1983 {
|
|
|
1984 Dynarr_free (str->convert_to);
|
|
|
1985 str->convert_to = 0;
|
|
|
1986 }
|
|
|
1987 if (str->convert_from)
|
|
428
|
1988 {
|
|
771
|
1989 Dynarr_free (str->convert_from);
|
|
|
1990 str->convert_from = 0;
|
|
|
1991 }
|
|
|
1992
|
|
800
|
1993 if (str->no_close_other)
|
|
|
1994 return Lstream_flush (str->other_end);
|
|
|
1995 else
|
|
|
1996 return Lstream_close (str->other_end);
|
|
771
|
1997 }
|
|
|
1998
|
|
|
1999 static void
|
|
|
2000 coding_finalizer (Lstream *stream)
|
|
|
2001 {
|
|
|
2002 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2003
|
|
|
2004 assert (!str->finalized);
|
|
|
2005 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str));
|
|
|
2006 if (str->data)
|
|
|
2007 {
|
|
1726
|
2008 xfree (str->data, void *);
|
|
771
|
2009 str->data = 0;
|
|
|
2010 }
|
|
|
2011 str->finalized = 1;
|
|
|
2012 }
|
|
|
2013
|
|
|
2014 static Lisp_Object
|
|
|
2015 coding_stream_canonicalize_after_coding (Lstream *stream)
|
|
|
2016 {
|
|
|
2017 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2018
|
|
|
2019 return XCODESYSMETH_OR_GIVEN (str->codesys, canonicalize_after_coding,
|
|
|
2020 (str), str->codesys);
|
|
|
2021 }
|
|
|
2022
|
|
|
2023 Lisp_Object
|
|
|
2024 coding_stream_detected_coding_system (Lstream *stream)
|
|
|
2025 {
|
|
|
2026 Lisp_Object codesys =
|
|
|
2027 coding_stream_canonicalize_after_coding (stream);
|
|
|
2028 if (NILP (codesys))
|
|
|
2029 return Fget_coding_system (Qidentity);
|
|
|
2030 return codesys;
|
|
|
2031 }
|
|
|
2032
|
|
|
2033 Lisp_Object
|
|
|
2034 coding_stream_coding_system (Lstream *stream)
|
|
|
2035 {
|
|
|
2036 return CODING_STREAM_DATA (stream)->codesys;
|
|
|
2037 }
|
|
|
2038
|
|
|
2039 /* Change the coding system associated with a stream. */
|
|
|
2040
|
|
|
2041 void
|
|
|
2042 set_coding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2043 {
|
|
|
2044 struct coding_stream *str = CODING_STREAM_DATA (lstr);
|
|
|
2045 if (EQ (str->orig_codesys, codesys))
|
|
|
2046 return;
|
|
|
2047 /* We do the equivalent of closing the stream, destroying it, and
|
|
|
2048 reinitializing it. This includes flushing out the data and signalling
|
|
|
2049 EOF, if we're a writing stream; we also replace the type-specific data
|
|
|
2050 with the data appropriate for the new coding system. */
|
|
|
2051 if (!NILP (str->codesys))
|
|
|
2052 {
|
|
|
2053 if (lstr->flags & LSTREAM_FL_WRITE)
|
|
|
2054 {
|
|
|
2055 Lstream_flush (lstr);
|
|
|
2056 str->eof = 1;
|
|
|
2057 coding_writer (lstr, 0, 0);
|
|
|
2058 str->eof = 0;
|
|
|
2059 }
|
|
|
2060 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str));
|
|
|
2061 }
|
|
|
2062 str->orig_codesys = codesys;
|
|
|
2063 str->codesys = coding_system_real_canonical (codesys);
|
|
|
2064
|
|
|
2065 if (str->data)
|
|
|
2066 {
|
|
1726
|
2067 xfree (str->data, void *);
|
|
771
|
2068 str->data = 0;
|
|
428
|
2069 }
|
|
771
|
2070 if (XCODING_SYSTEM_METHODS (str->codesys)->coding_data_size)
|
|
1204
|
2071 {
|
|
|
2072 str->data =
|
|
|
2073 xmalloc_and_zero (XCODING_SYSTEM_METHODS (str->codesys)->
|
|
|
2074 coding_data_size);
|
|
|
2075 str->type = XCODING_SYSTEM_METHODS (str->codesys)->enumtype;
|
|
|
2076 }
|
|
771
|
2077 MAYBE_XCODESYSMETH (str->codesys, init_coding_stream, (str));
|
|
|
2078 /* The new coding system may have different ideas regarding whether its
|
|
|
2079 ends are characters or bytes. */
|
|
|
2080 set_coding_character_mode (lstr);
|
|
|
2081 }
|
|
|
2082
|
|
|
2083 /* WARNING WARNING WARNING WARNING!!!!! If you open up a coding
|
|
|
2084 stream for writing, no automatic code detection will be performed.
|
|
|
2085 The reason for this is that automatic code detection requires a
|
|
|
2086 seekable input. Things will also fail if you open a coding
|
|
|
2087 stream for reading using a non-fully-specified coding system and
|
|
|
2088 a non-seekable input stream. */
|
|
|
2089
|
|
|
2090 static Lisp_Object
|
|
|
2091 make_coding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
800
|
2092 const char *mode, enum encode_decode direction,
|
|
802
|
2093 int flags)
|
|
771
|
2094 {
|
|
|
2095 Lstream *lstr = Lstream_new (lstream_coding, mode);
|
|
|
2096 struct coding_stream *str = CODING_STREAM_DATA (lstr);
|
|
|
2097
|
|
|
2098 codesys = Fget_coding_system (codesys);
|
|
|
2099 xzero (*str);
|
|
|
2100 str->codesys = Qnil;
|
|
|
2101 str->orig_codesys = Qnil;
|
|
|
2102 str->us = lstr;
|
|
|
2103 str->other_end = stream;
|
|
|
2104 str->convert_to = Dynarr_new (unsigned_char);
|
|
|
2105 str->convert_from = Dynarr_new (unsigned_char);
|
|
|
2106 str->direction = direction;
|
|
814
|
2107 if (flags & LSTREAM_FL_NO_CLOSE_OTHER)
|
|
802
|
2108 str->no_close_other = 1;
|
|
814
|
2109 if (flags & LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME)
|
|
802
|
2110 str->one_byte_at_a_time = 1;
|
|
814
|
2111 if (!(flags & LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING))
|
|
|
2112 str->set_char_mode_on_us_when_reading = 1;
|
|
802
|
2113
|
|
771
|
2114 set_coding_stream_coding_system (lstr, codesys);
|
|
793
|
2115 return wrap_lstream (lstr);
|
|
771
|
2116 }
|
|
|
2117
|
|
814
|
2118 /* FLAGS:
|
|
|
2119
|
|
|
2120 LSTREAM_FL_NO_CLOSE_OTHER
|
|
|
2121 Don't close STREAM (the stream at the other end) when this stream is
|
|
|
2122 closed.
|
|
|
2123
|
|
|
2124 LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME
|
|
|
2125 When reading from STREAM, read and process one byte at a time rather
|
|
|
2126 than in large chunks. This is for reading from TTY's, so we don't
|
|
|
2127 block. #### We should instead create a non-blocking filedesc stream
|
|
|
2128 that emulates the behavior as necessary using select(), when the
|
|
|
2129 fcntls don't work. (As seems to be the case on Cygwin.)
|
|
|
2130
|
|
|
2131 LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING
|
|
|
2132 When reading from STREAM, read and process one byte at a time rather
|
|
|
2133 than in large chunks. This is for reading from TTY's, so we don't
|
|
|
2134 block. #### We should instead create a non-blocking filedesc stream
|
|
|
2135 that emulates the behavior as necessary using select(), when the
|
|
|
2136 fcntls don't work. (As seems to be the case on Cygwin.)
|
|
|
2137 */
|
|
771
|
2138 Lisp_Object
|
|
|
2139 make_coding_input_stream (Lstream *stream, Lisp_Object codesys,
|
|
802
|
2140 enum encode_decode direction, int flags)
|
|
771
|
2141 {
|
|
800
|
2142 return make_coding_stream_1 (stream, codesys, "r", direction,
|
|
802
|
2143 flags);
|
|
771
|
2144 }
|
|
|
2145
|
|
814
|
2146 /* FLAGS:
|
|
|
2147
|
|
|
2148 LSTREAM_FL_NO_CLOSE_OTHER
|
|
|
2149 Don't close STREAM (the stream at the other end) when this stream is
|
|
|
2150 closed.
|
|
|
2151 */
|
|
771
|
2152 Lisp_Object
|
|
|
2153 make_coding_output_stream (Lstream *stream, Lisp_Object codesys,
|
|
802
|
2154 enum encode_decode direction, int flags)
|
|
771
|
2155 {
|
|
800
|
2156 return make_coding_stream_1 (stream, codesys, "w", direction,
|
|
802
|
2157 flags);
|
|
771
|
2158 }
|
|
|
2159
|
|
|
2160 static Lisp_Object
|
|
|
2161 encode_decode_coding_region (Lisp_Object start, Lisp_Object end,
|
|
|
2162 Lisp_Object coding_system, Lisp_Object buffer,
|
|
|
2163 enum encode_decode direction)
|
|
|
2164 {
|
|
|
2165 Charbpos b, e;
|
|
|
2166 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2167 Lisp_Object instream = Qnil, to_outstream = Qnil, outstream = Qnil;
|
|
|
2168 Lisp_Object from_outstream = Qnil, auto_outstream = Qnil;
|
|
|
2169 Lisp_Object lb_outstream = Qnil;
|
|
|
2170 Lisp_Object next;
|
|
|
2171 Lstream *istr, *ostr;
|
|
|
2172 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
2173 struct gcpro ngcpro1;
|
|
|
2174 int source_char, sink_char;
|
|
|
2175
|
|
|
2176 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2177 barf_if_buffer_read_only (buf, b, e);
|
|
|
2178
|
|
|
2179 GCPRO5 (instream, to_outstream, outstream, from_outstream, lb_outstream);
|
|
|
2180 NGCPRO1 (auto_outstream);
|
|
|
2181
|
|
|
2182 coding_system = Fget_coding_system (coding_system);
|
|
|
2183 source_char = encode_decode_source_sink_type_is_char (coding_system,
|
|
|
2184 CODING_SOURCE,
|
|
|
2185 direction);
|
|
|
2186 sink_char = encode_decode_source_sink_type_is_char (coding_system,
|
|
|
2187 CODING_SINK,
|
|
|
2188 direction);
|
|
|
2189
|
|
|
2190 /* Order is IN <---> [TO] -> OUT -> [FROM] -> [AUTODETECT-EOL] -> LB */
|
|
|
2191 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2192 next = lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2193
|
|
|
2194 if (direction == CODING_DECODE &&
|
|
|
2195 XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
|
2196 next = auto_outstream =
|
|
|
2197 make_coding_output_stream
|
|
800
|
2198 (XLSTREAM (next), Fget_coding_system (Qconvert_eol_autodetect),
|
|
|
2199 CODING_DECODE, 0);
|
|
771
|
2200
|
|
|
2201 if (!sink_char)
|
|
|
2202 next = from_outstream =
|
|
800
|
2203 make_coding_output_stream (XLSTREAM (next), Qbinary, CODING_DECODE, 0);
|
|
771
|
2204 outstream = make_coding_output_stream (XLSTREAM (next), coding_system,
|
|
800
|
2205 direction, 0);
|
|
771
|
2206 if (!source_char)
|
|
428
|
2207 {
|
|
771
|
2208 to_outstream =
|
|
|
2209 make_coding_output_stream (XLSTREAM (outstream),
|
|
800
|
2210 Qbinary, CODING_ENCODE, 0);
|
|
771
|
2211 ostr = XLSTREAM (to_outstream);
|
|
|
2212 }
|
|
|
2213 else
|
|
|
2214 ostr = XLSTREAM (outstream);
|
|
|
2215 istr = XLSTREAM (instream);
|
|
|
2216
|
|
|
2217 /* The chain of streams looks like this:
|
|
|
2218
|
|
2297
|
2219 [BUFFER] <----- (( read from/send to loop ))
|
|
771
|
2220 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is
|
|
|
2221 in bytes]
|
|
|
2222 ------> [ENCODE/DECODE AS SPECIFIED]
|
|
|
2223 ------> [BYTE->CHAR i.e. DECODE AS BINARY
|
|
|
2224 if sink is in bytes]
|
|
|
2225 ------> [AUTODETECT EOL if
|
|
|
2226 we're decoding and
|
|
|
2227 coding system calls
|
|
|
2228 for this]
|
|
|
2229 ------> [BUFFER]
|
|
|
2230 */
|
|
2367
|
2231
|
|
|
2232 /* #### See comment
|
|
|
2233
|
|
|
2234 EFFICIENCY OF CODING CONVERSION WITH MULTIPLE COPIES/CHAINS
|
|
|
2235
|
|
|
2236 in text.c.
|
|
|
2237 */
|
|
|
2238
|
|
771
|
2239 while (1)
|
|
|
2240 {
|
|
|
2241 char tempbuf[1024]; /* some random amount */
|
|
|
2242 Charbpos newpos, even_newer_pos;
|
|
|
2243 Charbpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2244 Bytecount size_in_bytes =
|
|
|
2245 Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2246
|
|
|
2247 if (!size_in_bytes)
|
|
|
2248 break;
|
|
|
2249 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2250 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2251 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2252 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2253 even_newer_pos, 0);
|
|
428
|
2254 }
|
|
771
|
2255
|
|
|
2256 {
|
|
|
2257 Charcount retlen =
|
|
|
2258 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2259 Lstream_close (istr);
|
|
|
2260 Lstream_close (ostr);
|
|
|
2261 NUNGCPRO;
|
|
|
2262 UNGCPRO;
|
|
|
2263 Lstream_delete (istr);
|
|
|
2264 if (!NILP (from_outstream))
|
|
|
2265 Lstream_delete (XLSTREAM (from_outstream));
|
|
|
2266 Lstream_delete (XLSTREAM (outstream));
|
|
|
2267 if (!NILP (to_outstream))
|
|
|
2268 Lstream_delete (XLSTREAM (to_outstream));
|
|
|
2269 if (!NILP (auto_outstream))
|
|
|
2270 Lstream_delete (XLSTREAM (auto_outstream));
|
|
|
2271 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2272 return make_int (retlen);
|
|
|
2273 }
|
|
|
2274 }
|
|
|
2275
|
|
|
2276 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
2277 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
2278 This is useful if you've read in encoded text from a file without decoding
|
|
|
2279 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
2280 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
|
2281 Return length of decoded text.
|
|
|
2282 BUFFER defaults to the current buffer if unspecified.
|
|
|
2283 */
|
|
|
2284 (start, end, coding_system, buffer))
|
|
|
2285 {
|
|
|
2286 return encode_decode_coding_region (start, end, coding_system, buffer,
|
|
|
2287 CODING_DECODE);
|
|
|
2288 }
|
|
|
2289
|
|
|
2290 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2291 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2292 This will, for example, convert Japanese characters into stuff such as
|
|
|
2293 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
|
2294 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2295 */
|
|
|
2296 (start, end, coding_system, buffer))
|
|
|
2297 {
|
|
|
2298 return encode_decode_coding_region (start, end, coding_system, buffer,
|
|
|
2299 CODING_ENCODE);
|
|
428
|
2300 }
|
|
|
2301
|
|
|
2302
|
|
|
2303 /************************************************************************/
|
|
771
|
2304 /* Chain methods */
|
|
428
|
2305 /************************************************************************/
|
|
|
2306
|
|
771
|
2307 /* #### Need a way to create "opposite-direction" coding systems. */
|
|
|
2308
|
|
|
2309 /* Chain two or more coding systems together to make a combination coding
|
|
|
2310 system. */
|
|
|
2311
|
|
|
2312 struct chain_coding_system
|
|
|
2313 {
|
|
|
2314 /* List of coding systems, in decode order */
|
|
|
2315 Lisp_Object *chain;
|
|
|
2316 /* Number of coding systems in list */
|
|
|
2317 int count;
|
|
|
2318 /* Coding system to return as a result of canonicalize-after-coding */
|
|
|
2319 Lisp_Object canonicalize_after_coding;
|
|
|
2320 };
|
|
|
2321
|
|
|
2322 struct chain_coding_stream
|
|
|
2323 {
|
|
|
2324 int initted;
|
|
|
2325 /* Lstreams for chain coding system */
|
|
|
2326 Lisp_Object *lstreams;
|
|
|
2327 int lstream_count;
|
|
|
2328 };
|
|
|
2329
|
|
1204
|
2330 static const struct memory_description chain_coding_system_description[] = {
|
|
|
2331 { XD_INT, offsetof (struct chain_coding_system, count) },
|
|
2367
|
2332 { XD_BLOCK_PTR, offsetof (struct chain_coding_system, chain),
|
|
1204
|
2333 XD_INDIRECT (0, 0), &lisp_object_description },
|
|
|
2334 { XD_LISP_OBJECT, offsetof (struct chain_coding_system,
|
|
|
2335 canonicalize_after_coding) },
|
|
771
|
2336 { XD_END }
|
|
|
2337 };
|
|
|
2338
|
|
1204
|
2339 static const struct memory_description chain_coding_stream_description_1 [] = {
|
|
|
2340 { XD_INT, offsetof (struct chain_coding_stream, lstream_count) },
|
|
2367
|
2341 { XD_BLOCK_PTR, offsetof (struct chain_coding_stream, lstreams),
|
|
1204
|
2342 XD_INDIRECT (0, 0), &lisp_object_description },
|
|
771
|
2343 { XD_END }
|
|
|
2344 };
|
|
|
2345
|
|
1204
|
2346 const struct sized_memory_description chain_coding_stream_description = {
|
|
|
2347 sizeof (struct chain_coding_stream), chain_coding_stream_description_1
|
|
|
2348 };
|
|
|
2349
|
|
|
2350 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (chain);
|
|
|
2351
|
|
771
|
2352 static Lisp_Object
|
|
|
2353 chain_canonicalize (Lisp_Object codesys)
|
|
|
2354 {
|
|
|
2355 /* We make use of the fact that this method is called at init time, after
|
|
|
2356 properties have been parsed. init_method is called too early. */
|
|
|
2357 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
2358 any more. */
|
|
|
2359 Lisp_Object chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (codesys),
|
|
|
2360 XCODING_SYSTEM_CHAIN_CHAIN (codesys));
|
|
|
2361 chain = Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (codesys),
|
|
|
2362 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (codesys),
|
|
|
2363 chain));
|
|
|
2364 Fputhash (chain, codesys, Vchain_canonicalize_hash_table);
|
|
|
2365 return codesys;
|
|
|
2366 }
|
|
|
2367
|
|
|
2368 static Lisp_Object
|
|
|
2369 chain_canonicalize_after_coding (struct coding_stream *str)
|
|
|
2370 {
|
|
|
2371 Lisp_Object cac =
|
|
|
2372 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (str->codesys);
|
|
|
2373 if (!NILP (cac))
|
|
|
2374 return cac;
|
|
|
2375 return str->codesys;
|
|
|
2376 #if 0
|
|
|
2377 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain);
|
|
|
2378 Lisp_Object us = str->codesys, codesys;
|
|
|
2379 int i;
|
|
|
2380 Lisp_Object chain;
|
|
|
2381 Lisp_Object tail;
|
|
|
2382 int changed = 0;
|
|
|
2383
|
|
|
2384 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
2385 any more. */
|
|
|
2386 if (str->direction == CODING_ENCODE || !data->initted)
|
|
|
2387 return us;
|
|
|
2388
|
|
|
2389 chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (us),
|
|
|
2390 XCODING_SYSTEM_CHAIN_CHAIN (us));
|
|
|
2391
|
|
|
2392 tail = chain;
|
|
|
2393 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (us); i++)
|
|
|
2394 {
|
|
|
2395 codesys = (coding_stream_canonicalize_after_coding
|
|
|
2396 (XLSTREAM (data->lstreams[i])));
|
|
|
2397 if (!EQ (codesys, XCAR (tail)))
|
|
|
2398 changed = 1;
|
|
|
2399 XCAR (tail) = codesys;
|
|
|
2400 tail = XCDR (tail);
|
|
|
2401 }
|
|
|
2402
|
|
|
2403 if (!changed)
|
|
|
2404 return us;
|
|
|
2405
|
|
|
2406 chain = delq_no_quit (Qnil, chain);
|
|
|
2407
|
|
|
2408 if (NILP (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us)) &&
|
|
|
2409 NILP (XCODING_SYSTEM_POST_READ_CONVERSION (us)))
|
|
|
2410 {
|
|
|
2411 if (NILP (chain))
|
|
|
2412 return Qnil;
|
|
|
2413 if (NILP (XCDR (chain)))
|
|
|
2414 return XCAR (chain);
|
|
|
2415 }
|
|
|
2416
|
|
|
2417 codesys = Fgethash (Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us),
|
|
|
2418 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (us),
|
|
|
2419 chain)), Vchain_canonicalize_hash_table,
|
|
|
2420 Qnil);
|
|
|
2421 if (!NILP (codesys))
|
|
|
2422 return codesys;
|
|
|
2423 return make_internal_coding_system
|
|
|
2424 (us, "internal-chain-canonicalizer-wrapper",
|
|
|
2425 Qchain, Qunbound, list2 (Qchain, chain));
|
|
|
2426 #endif /* 0 */
|
|
|
2427 }
|
|
|
2428
|
|
|
2429 static void
|
|
|
2430 chain_init (Lisp_Object codesys)
|
|
|
2431 {
|
|
|
2432 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = Qnil;
|
|
|
2433 }
|
|
|
2434
|
|
|
2435 static void
|
|
|
2436 chain_mark (Lisp_Object codesys)
|
|
|
2437 {
|
|
|
2438 int i;
|
|
|
2439
|
|
|
2440 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (codesys); i++)
|
|
|
2441 mark_object (XCODING_SYSTEM_CHAIN_CHAIN (codesys)[i]);
|
|
|
2442 mark_object (XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys));
|
|
|
2443 }
|
|
|
2444
|
|
|
2445 static void
|
|
|
2446 chain_mark_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2447 {
|
|
|
2448 int i;
|
|
|
2449
|
|
|
2450 for (i = 0; i < data->lstream_count; i++)
|
|
|
2451 mark_object (data->lstreams[i]);
|
|
|
2452 }
|
|
|
2453
|
|
|
2454 static void
|
|
|
2455 chain_mark_coding_stream (struct coding_stream *str)
|
|
|
2456 {
|
|
|
2457 chain_mark_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2458 }
|
|
|
2459
|
|
|
2460 static void
|
|
|
2461 chain_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
2462 {
|
|
|
2463 int i;
|
|
|
2464
|
|
826
|
2465 write_c_string (printcharfun, "(");
|
|
771
|
2466 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (cs); i++)
|
|
|
2467 {
|
|
826
|
2468 write_c_string (printcharfun, i == 0 ? "" : "->");
|
|
771
|
2469 print_coding_system_in_print_method (XCODING_SYSTEM_CHAIN_CHAIN (cs)[i],
|
|
|
2470 printcharfun, escapeflag);
|
|
|
2471 }
|
|
|
2472 {
|
|
|
2473 Lisp_Object cac = XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (cs);
|
|
|
2474 if (!NILP (cac))
|
|
|
2475 {
|
|
|
2476 if (i > 0)
|
|
826
|
2477 write_c_string (printcharfun, " ");
|
|
|
2478 write_c_string (printcharfun, "canonicalize-after-coding=");
|
|
771
|
2479 print_coding_system_in_print_method (cac, printcharfun, escapeflag);
|
|
|
2480 }
|
|
|
2481 }
|
|
|
2482
|
|
826
|
2483 write_c_string (printcharfun, ")");
|
|
771
|
2484 }
|
|
|
2485
|
|
|
2486 static void
|
|
|
2487 chain_rewind_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2488 {
|
|
|
2489 /* Each will rewind the next; there is always at least one stream (the
|
|
|
2490 dynarr stream at the end) if we're initted */
|
|
|
2491 if (data->initted)
|
|
|
2492 Lstream_rewind (XLSTREAM (data->lstreams[0]));
|
|
|
2493 }
|
|
|
2494
|
|
|
2495 static void
|
|
|
2496 chain_rewind_coding_stream (struct coding_stream *str)
|
|
|
2497 {
|
|
|
2498 chain_rewind_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2499 }
|
|
|
2500
|
|
|
2501 static void
|
|
|
2502 chain_init_coding_streams_1 (struct chain_coding_stream *data,
|
|
|
2503 unsigned_char_dynarr *dst,
|
|
|
2504 int ncodesys, Lisp_Object *codesys,
|
|
|
2505 enum encode_decode direction)
|
|
|
2506 {
|
|
|
2507 int i;
|
|
|
2508 Lisp_Object lstream_out;
|
|
|
2509
|
|
|
2510 data->lstream_count = ncodesys + 1;
|
|
|
2511 data->lstreams = xnew_array (Lisp_Object, data->lstream_count);
|
|
|
2512
|
|
|
2513 lstream_out = make_dynarr_output_stream (dst);
|
|
|
2514 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, 0);
|
|
|
2515 data->lstreams[data->lstream_count - 1] = lstream_out;
|
|
|
2516
|
|
|
2517 for (i = ncodesys - 1; i >= 0; i--)
|
|
|
2518 {
|
|
|
2519 data->lstreams[i] =
|
|
|
2520 make_coding_output_stream
|
|
|
2521 (XLSTREAM (lstream_out),
|
|
|
2522 codesys[direction == CODING_ENCODE ? ncodesys - (i + 1) : i],
|
|
800
|
2523 direction, 0);
|
|
771
|
2524 lstream_out = data->lstreams[i];
|
|
|
2525 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED,
|
|
|
2526 0);
|
|
|
2527 }
|
|
|
2528 data->initted = 1;
|
|
|
2529 }
|
|
|
2530
|
|
|
2531 static Bytecount
|
|
|
2532 chain_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
2533 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
2534 {
|
|
|
2535 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain);
|
|
|
2536
|
|
|
2537 if (str->eof)
|
|
|
2538 {
|
|
|
2539 /* Each will close the next; there is always at least one stream (the
|
|
|
2540 dynarr stream at the end) if we're initted. We need to close now
|
|
|
2541 because more data may be generated. */
|
|
|
2542 if (data->initted)
|
|
|
2543 Lstream_close (XLSTREAM (data->lstreams[0]));
|
|
|
2544 return n;
|
|
|
2545 }
|
|
|
2546
|
|
|
2547 if (!data->initted)
|
|
|
2548 chain_init_coding_streams_1
|
|
|
2549 (data, dst, XCODING_SYSTEM_CHAIN_COUNT (str->codesys),
|
|
|
2550 XCODING_SYSTEM_CHAIN_CHAIN (str->codesys), str->direction);
|
|
|
2551
|
|
|
2552 if (Lstream_write (XLSTREAM (data->lstreams[0]), src, n) < 0)
|
|
|
2553 return -1;
|
|
|
2554 return n;
|
|
|
2555 }
|
|
|
2556
|
|
|
2557 static void
|
|
|
2558 chain_finalize_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2559 {
|
|
|
2560 if (data->lstreams)
|
|
|
2561 {
|
|
2297
|
2562 /* During GC, these objects are unmarked, and are about to be freed.
|
|
|
2563 We do NOT want them on the free list, and that will cause lots of
|
|
|
2564 nastiness including crashes. Just let them be freed normally. */
|
|
771
|
2565 if (!gc_in_progress)
|
|
|
2566 {
|
|
|
2567 int i;
|
|
2297
|
2568 /* Order of deletion is important here! Delete from the head of
|
|
|
2569 the chain and work your way towards the tail. In general,
|
|
|
2570 when you delete an object, there should be *NO* pointers to it
|
|
|
2571 anywhere. Deleting back-to-front would be a problem because
|
|
|
2572 there are pointers going forward. If there were pointers in
|
|
|
2573 both directions, you'd have to disconnect the pointers to a
|
|
|
2574 particular object before deleting it. */
|
|
771
|
2575 for (i = 0; i < data->lstream_count; i++)
|
|
|
2576 Lstream_delete (XLSTREAM ((data->lstreams)[i]));
|
|
|
2577 }
|
|
1726
|
2578 xfree (data->lstreams, Lisp_Object *);
|
|
771
|
2579 }
|
|
|
2580 }
|
|
|
2581
|
|
|
2582 static void
|
|
|
2583 chain_finalize_coding_stream (struct coding_stream *str)
|
|
|
2584 {
|
|
|
2585 chain_finalize_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2586 }
|
|
|
2587
|
|
|
2588 static void
|
|
|
2589 chain_finalize (Lisp_Object c)
|
|
|
2590 {
|
|
|
2591 if (XCODING_SYSTEM_CHAIN_CHAIN (c))
|
|
1726
|
2592 xfree (XCODING_SYSTEM_CHAIN_CHAIN (c), Lisp_Object *);
|
|
771
|
2593 }
|
|
|
2594
|
|
428
|
2595 static int
|
|
771
|
2596 chain_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
|
2597 {
|
|
|
2598 if (EQ (key, Qchain))
|
|
|
2599 {
|
|
|
2600 Lisp_Object *cslist;
|
|
|
2601 int count = 0;
|
|
|
2602 int i;
|
|
|
2603
|
|
2367
|
2604 {
|
|
|
2605 EXTERNAL_LIST_LOOP_2 (elt, value)
|
|
|
2606 {
|
|
|
2607 Fget_coding_system (elt);
|
|
|
2608 count++;
|
|
|
2609 }
|
|
|
2610 }
|
|
771
|
2611
|
|
|
2612 cslist = xnew_array (Lisp_Object, count);
|
|
|
2613 XCODING_SYSTEM_CHAIN_CHAIN (codesys) = cslist;
|
|
|
2614
|
|
|
2615 count = 0;
|
|
2367
|
2616 {
|
|
|
2617 EXTERNAL_LIST_LOOP_2 (elt, value)
|
|
|
2618 {
|
|
|
2619 cslist[count] = Fget_coding_system (elt);
|
|
|
2620 count++;
|
|
|
2621 }
|
|
|
2622 }
|
|
771
|
2623
|
|
|
2624 XCODING_SYSTEM_CHAIN_COUNT (codesys) = count;
|
|
|
2625
|
|
|
2626 for (i = 0; i < count - 1; i++)
|
|
|
2627 {
|
|
|
2628 if (decoding_source_sink_type_is_char (cslist[i], CODING_SINK) !=
|
|
|
2629 decoding_source_sink_type_is_char (cslist[i + 1], CODING_SOURCE))
|
|
|
2630 invalid_argument_2 ("Sink of first must match source of second",
|
|
|
2631 cslist[i], cslist[i + 1]);
|
|
|
2632 }
|
|
|
2633 }
|
|
|
2634 else if (EQ (key, Qcanonicalize_after_coding))
|
|
|
2635 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) =
|
|
|
2636 Fget_coding_system (value);
|
|
|
2637 else
|
|
|
2638 return 0;
|
|
|
2639 return 1;
|
|
|
2640 }
|
|
|
2641
|
|
|
2642 static Lisp_Object
|
|
|
2643 chain_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
|
2644 {
|
|
|
2645 if (EQ (prop, Qchain))
|
|
|
2646 {
|
|
|
2647 Lisp_Object result = Qnil;
|
|
|
2648 int i;
|
|
|
2649
|
|
|
2650 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (coding_system); i++)
|
|
|
2651 result = Fcons (XCODING_SYSTEM_CHAIN_CHAIN (coding_system)[i],
|
|
|
2652 result);
|
|
|
2653
|
|
|
2654 return Fnreverse (result);
|
|
|
2655 }
|
|
|
2656 else if (EQ (prop, Qcanonicalize_after_coding))
|
|
|
2657 return XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (coding_system);
|
|
|
2658 else
|
|
|
2659 return Qunbound;
|
|
|
2660 }
|
|
|
2661
|
|
|
2662 static enum source_sink_type
|
|
|
2663 chain_conversion_end_type (Lisp_Object codesys)
|
|
|
2664 {
|
|
|
2665 Lisp_Object *cslist = XCODING_SYSTEM_CHAIN_CHAIN (codesys);
|
|
|
2666 int n = XCODING_SYSTEM_CHAIN_COUNT (codesys);
|
|
|
2667 int charp_source, charp_sink;
|
|
|
2668
|
|
|
2669 if (n == 0)
|
|
|
2670 return DECODES_BYTE_TO_BYTE; /* arbitrary */
|
|
|
2671 charp_source = decoding_source_sink_type_is_char (cslist[0], CODING_SOURCE);
|
|
|
2672 charp_sink = decoding_source_sink_type_is_char (cslist[n - 1], CODING_SINK);
|
|
|
2673
|
|
|
2674 switch (charp_source * 2 + charp_sink)
|
|
|
2675 {
|
|
|
2676 case 0: return DECODES_BYTE_TO_BYTE;
|
|
|
2677 case 1: return DECODES_BYTE_TO_CHARACTER;
|
|
|
2678 case 2: return DECODES_CHARACTER_TO_BYTE;
|
|
|
2679 case 3: return DECODES_CHARACTER_TO_CHARACTER;
|
|
|
2680 }
|
|
|
2681
|
|
|
2682 abort ();
|
|
|
2683 return DECODES_BYTE_TO_BYTE;
|
|
|
2684 }
|
|
|
2685
|
|
|
2686
|
|
|
2687 /************************************************************************/
|
|
|
2688 /* No-conversion methods */
|
|
|
2689 /************************************************************************/
|
|
|
2690
|
|
|
2691 /* "No conversion"; used for binary files. We use quotes because there
|
|
|
2692 really is some conversion being applied (it does byte<->char
|
|
|
2693 conversion), but it appears to the user as if the text is read in
|
|
2297
|
2694 without conversion.
|
|
|
2695
|
|
|
2696 #### Shouldn't we _call_ it that, then? And while we're at it,
|
|
|
2697 separate it into "to_internal" and "to_external"? */
|
|
771
|
2698 DEFINE_CODING_SYSTEM_TYPE (no_conversion);
|
|
|
2699
|
|
|
2700 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
2701 contain all 256 possible byte values and that are not to be
|
|
|
2702 interpreted as being in any particular encoding. */
|
|
|
2703 static Bytecount
|
|
|
2704 no_conversion_convert (struct coding_stream *str,
|
|
|
2705 const UExtbyte *src,
|
|
|
2706 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
2707 {
|
|
|
2708 UExtbyte c;
|
|
|
2709 unsigned int ch = str->ch;
|
|
|
2710 Bytecount orign = n;
|
|
|
2711
|
|
|
2712 if (str->direction == CODING_DECODE)
|
|
|
2713 {
|
|
|
2714 while (n--)
|
|
|
2715 {
|
|
|
2716 c = *src++;
|
|
|
2717
|
|
|
2718 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2719 }
|
|
|
2720
|
|
|
2721 if (str->eof)
|
|
|
2722 DECODE_OUTPUT_PARTIAL_CHAR (ch, dst);
|
|
|
2723 }
|
|
|
2724 else
|
|
|
2725 {
|
|
|
2726
|
|
|
2727 while (n--)
|
|
|
2728 {
|
|
|
2729 c = *src++;
|
|
826
|
2730 if (byte_ascii_p (c))
|
|
771
|
2731 {
|
|
|
2732 assert (ch == 0);
|
|
|
2733 Dynarr_add (dst, c);
|
|
|
2734 }
|
|
|
2735 #ifdef MULE
|
|
867
|
2736 else if (ibyte_leading_byte_p (c))
|
|
771
|
2737 {
|
|
|
2738 assert (ch == 0);
|
|
|
2739 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
2740 c == LEADING_BYTE_CONTROL_1)
|
|
|
2741 ch = c;
|
|
|
2742 else
|
|
2297
|
2743 /* #### This is just plain unacceptable. */
|
|
771
|
2744 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
2745 }
|
|
|
2746 else
|
|
|
2747 {
|
|
|
2748 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
|
2749 Dynarr_add (dst, c);
|
|
|
2750 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
2751 {
|
|
|
2752 assert (c < 0xC0);
|
|
|
2753 Dynarr_add (dst, c - 0x20);
|
|
|
2754 }
|
|
|
2755 /* else it should be the second or third byte of an
|
|
|
2756 untranslatable character, so ignore it */
|
|
|
2757 ch = 0;
|
|
|
2758 }
|
|
|
2759 #endif /* MULE */
|
|
|
2760
|
|
|
2761 }
|
|
|
2762 }
|
|
|
2763
|
|
|
2764 str->ch = ch;
|
|
|
2765 return orign;
|
|
|
2766 }
|
|
|
2767
|
|
|
2768 DEFINE_DETECTOR (no_conversion);
|
|
|
2769 DEFINE_DETECTOR_CATEGORY (no_conversion, no_conversion);
|
|
|
2770
|
|
|
2771 struct no_conversion_detector
|
|
|
2772 {
|
|
|
2773 int dummy;
|
|
|
2774 };
|
|
|
2775
|
|
|
2776 static void
|
|
2286
|
2777 no_conversion_detect (struct detection_state *st, const UExtbyte *UNUSED (src),
|
|
|
2778 Bytecount UNUSED (n))
|
|
771
|
2779 {
|
|
|
2780 /* Hack until we get better handling of this stuff! */
|
|
|
2781 DET_RESULT (st, no_conversion) = DET_SLIGHTLY_LIKELY;
|
|
|
2782 }
|
|
|
2783
|
|
|
2784
|
|
|
2785 /************************************************************************/
|
|
|
2786 /* Convert-eol methods */
|
|
|
2787 /************************************************************************/
|
|
|
2788
|
|
|
2789 /* This is used to handle end-of-line (EOL) differences. It is
|
|
|
2790 character-to-character, and works (when encoding) *BEFORE* sending
|
|
|
2791 data to the main encoding routine -- thus, that routine must handle
|
|
|
2792 different EOL types itself if it does line-oriented type processing.
|
|
|
2793 This is unavoidable because we don't know whether the output of the
|
|
|
2794 main encoding routine is ASCII compatible (Unicode is definitely not,
|
|
2297
|
2795 for example). [[ sjt sez this is bogus. There should be _no_ EOL
|
|
|
2796 processing (or processing of any kind) after conversion to external. ]]
|
|
771
|
2797
|
|
793
|
2798 There is one parameter: `subtype', either `cr', `lf', `crlf', or nil.
|
|
771
|
2799 */
|
|
|
2800
|
|
|
2801 struct convert_eol_coding_system
|
|
|
2802 {
|
|
|
2803 enum eol_type subtype;
|
|
2132
|
2804 int dummy; /* On some architectures (eg ia64) the portable dumper can
|
|
|
2805 produce unaligned access errors without this field. Probably
|
|
|
2806 because the combined structure of this structure and
|
|
|
2807 Lisp_Coding_System is not properly aligned. */
|
|
771
|
2808 };
|
|
|
2809
|
|
|
2810 #define CODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \
|
|
|
2811 (CODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype)
|
|
|
2812 #define XCODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \
|
|
|
2813 (XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype)
|
|
|
2814
|
|
|
2815 struct convert_eol_coding_stream
|
|
|
2816 {
|
|
|
2817 enum eol_type actual;
|
|
|
2818 };
|
|
|
2819
|
|
1204
|
2820 static const struct memory_description
|
|
771
|
2821 convert_eol_coding_system_description[] = {
|
|
|
2822 { XD_END }
|
|
|
2823 };
|
|
|
2824
|
|
1204
|
2825 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol);
|
|
|
2826
|
|
771
|
2827 static void
|
|
2286
|
2828 convert_eol_print (Lisp_Object cs, Lisp_Object printcharfun,
|
|
|
2829 int UNUSED (escapeflag))
|
|
771
|
2830 {
|
|
|
2831 struct convert_eol_coding_system *data =
|
|
|
2832 XCODING_SYSTEM_TYPE_DATA (cs, convert_eol);
|
|
|
2833
|
|
|
2834 write_fmt_string (printcharfun, "(%s)",
|
|
|
2835 data->subtype == EOL_LF ? "lf" :
|
|
|
2836 data->subtype == EOL_CRLF ? "crlf" :
|
|
|
2837 data->subtype == EOL_CR ? "cr" :
|
|
793
|
2838 data->subtype == EOL_AUTODETECT ? "nil" :
|
|
771
|
2839 (abort(), ""));
|
|
|
2840 }
|
|
|
2841
|
|
|
2842 static enum source_sink_type
|
|
2286
|
2843 convert_eol_conversion_end_type (Lisp_Object UNUSED (codesys))
|
|
771
|
2844 {
|
|
|
2845 return DECODES_CHARACTER_TO_CHARACTER;
|
|
|
2846 }
|
|
|
2847
|
|
|
2848 static int
|
|
|
2849 convert_eol_putprop (Lisp_Object codesys,
|
|
|
2850 Lisp_Object key,
|
|
|
2851 Lisp_Object value)
|
|
|
2852 {
|
|
|
2853 struct convert_eol_coding_system *data =
|
|
|
2854 XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol);
|
|
|
2855
|
|
|
2856 if (EQ (key, Qsubtype))
|
|
|
2857 {
|
|
|
2858 if (EQ (value, Qlf) /* || EQ (value, Qunix) */)
|
|
|
2859 data->subtype = EOL_LF;
|
|
|
2860 else if (EQ (value, Qcrlf) /* || EQ (value, Qdos) */)
|
|
|
2861 data->subtype = EOL_CRLF;
|
|
|
2862 else if (EQ (value, Qcr) /* || EQ (value, Qmac) */)
|
|
|
2863 data->subtype = EOL_CR;
|
|
793
|
2864 else if (EQ (value, Qnil))
|
|
771
|
2865 data->subtype = EOL_AUTODETECT;
|
|
|
2866 else invalid_constant ("Unrecognized eol type", value);
|
|
|
2867 }
|
|
|
2868 else
|
|
|
2869 return 0;
|
|
|
2870 return 1;
|
|
|
2871 }
|
|
|
2872
|
|
|
2873 static Lisp_Object
|
|
|
2874 convert_eol_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
|
2875 {
|
|
|
2876 struct convert_eol_coding_system *data =
|
|
|
2877 XCODING_SYSTEM_TYPE_DATA (coding_system, convert_eol);
|
|
|
2878
|
|
|
2879 if (EQ (prop, Qsubtype))
|
|
|
2880 {
|
|
|
2881 switch (data->subtype)
|
|
|
2882 {
|
|
|
2883 case EOL_LF: return Qlf;
|
|
|
2884 case EOL_CRLF: return Qcrlf;
|
|
|
2885 case EOL_CR: return Qcr;
|
|
793
|
2886 case EOL_AUTODETECT: return Qnil;
|
|
771
|
2887 default: abort ();
|
|
|
2888 }
|
|
|
2889 }
|
|
|
2890
|
|
|
2891 return Qunbound;
|
|
|
2892 }
|
|
|
2893
|
|
|
2894 static void
|
|
|
2895 convert_eol_init_coding_stream (struct coding_stream *str)
|
|
|
2896 {
|
|
|
2897 struct convert_eol_coding_stream *data =
|
|
|
2898 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
2899 data->actual = XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys);
|
|
|
2900 }
|
|
|
2901
|
|
|
2902 static Bytecount
|
|
867
|
2903 convert_eol_convert (struct coding_stream *str, const Ibyte *src,
|
|
771
|
2904 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
2905 {
|
|
|
2906 if (str->direction == CODING_DECODE)
|
|
|
2907 {
|
|
|
2908 struct convert_eol_coding_stream *data =
|
|
|
2909 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
2910
|
|
|
2911 if (data->actual == EOL_AUTODETECT)
|
|
|
2912 {
|
|
|
2913 Bytecount n2 = n;
|
|
867
|
2914 const Ibyte *src2 = src;
|
|
771
|
2915
|
|
|
2916 for (; n2; n2--)
|
|
|
2917 {
|
|
867
|
2918 Ibyte c = *src2++;
|
|
771
|
2919 if (c == '\n')
|
|
|
2920 {
|
|
|
2921 data->actual = EOL_LF;
|
|
|
2922 break;
|
|
|
2923 }
|
|
|
2924 else if (c == '\r')
|
|
|
2925 {
|
|
|
2926 if (n2 == 1)
|
|
|
2927 {
|
|
|
2928 /* If we're seeing a '\r' at the end of the data, then
|
|
|
2929 reject the '\r' right now so it doesn't become an
|
|
|
2930 issue in the code below -- unless we're at the end of
|
|
|
2931 the stream, in which case we can't do that (because
|
|
|
2932 then the '\r' will never get written out), and in any
|
|
|
2933 case we should be recognizing it at EOL_CR format. */
|
|
|
2934 if (str->eof)
|
|
|
2935 data->actual = EOL_CR;
|
|
|
2936 else
|
|
|
2937 n--;
|
|
|
2938 break;
|
|
|
2939 }
|
|
|
2940 else if (*src2 == '\n')
|
|
|
2941 data->actual = EOL_CRLF;
|
|
|
2942 else
|
|
|
2943 data->actual = EOL_CR;
|
|
|
2944 break;
|
|
|
2945 }
|
|
|
2946 }
|
|
|
2947 }
|
|
|
2948
|
|
|
2949 /* str->eof is set, the caller reached EOF on the other end and has
|
|
|
2950 no new data to give us. The only data we get is the data we
|
|
|
2951 rejected from last time. */
|
|
|
2952 if (data->actual == EOL_LF || data->actual == EOL_AUTODETECT ||
|
|
|
2953 (str->eof))
|
|
|
2954 Dynarr_add_many (dst, src, n);
|
|
|
2955 else
|
|
|
2956 {
|
|
867
|
2957 const Ibyte *end = src + n;
|
|
771
|
2958 while (1)
|
|
|
2959 {
|
|
|
2960 /* Find the next section with no \r and add it. */
|
|
867
|
2961 const Ibyte *runstart = src;
|
|
|
2962 src = (Ibyte *) memchr (src, '\r', end - src);
|
|
771
|
2963 if (!src)
|
|
|
2964 src = end;
|
|
|
2965 Dynarr_add_many (dst, runstart, src - runstart);
|
|
|
2966 /* Stop if at end ... */
|
|
|
2967 if (src == end)
|
|
|
2968 break;
|
|
|
2969 /* ... else, translate as necessary. */
|
|
|
2970 src++;
|
|
|
2971 if (data->actual == EOL_CR)
|
|
|
2972 Dynarr_add (dst, '\n');
|
|
|
2973 /* We need to be careful here with CRLF. If we see a CR at the
|
|
|
2974 end of the data, we don't know if it's part of a CRLF, so we
|
|
|
2975 reject it. Otherwise: If it's part of a CRLF, eat it and
|
|
|
2976 loop; the following LF gets added next time around. If it's
|
|
|
2977 not part of a CRLF, add the CR and loop. The following
|
|
|
2978 character will be processed in the next loop iteration. This
|
|
|
2979 correctly handles a sequence like CR+CR+LF. */
|
|
|
2980 else if (src == end)
|
|
|
2981 return n - 1; /* reject the CR at the end; we'll get it again
|
|
|
2982 next time the convert method is called */
|
|
|
2983 else if (*src != '\n')
|
|
|
2984 Dynarr_add (dst, '\r');
|
|
|
2985 }
|
|
|
2986 }
|
|
|
2987
|
|
|
2988 return n;
|
|
|
2989 }
|
|
|
2990 else
|
|
|
2991 {
|
|
|
2992 enum eol_type subtype =
|
|
|
2993 XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys);
|
|
867
|
2994 const Ibyte *end = src + n;
|
|
771
|
2995
|
|
|
2996 /* We try to be relatively efficient here. */
|
|
|
2997 if (subtype == EOL_LF)
|
|
|
2998 Dynarr_add_many (dst, src, n);
|
|
|
2999 else
|
|
|
3000 {
|
|
|
3001 while (1)
|
|
|
3002 {
|
|
|
3003 /* Find the next section with no \n and add it. */
|
|
867
|
3004 const Ibyte *runstart = src;
|
|
|
3005 src = (Ibyte *) memchr (src, '\n', end - src);
|
|
771
|
3006 if (!src)
|
|
|
3007 src = end;
|
|
|
3008 Dynarr_add_many (dst, runstart, src - runstart);
|
|
|
3009 /* Stop if at end ... */
|
|
|
3010 if (src == end)
|
|
|
3011 break;
|
|
|
3012 /* ... else, skip over \n and add its translation. */
|
|
|
3013 src++;
|
|
|
3014 Dynarr_add (dst, '\r');
|
|
|
3015 if (subtype == EOL_CRLF)
|
|
|
3016 Dynarr_add (dst, '\n');
|
|
|
3017 }
|
|
|
3018 }
|
|
|
3019
|
|
|
3020 return n;
|
|
|
3021 }
|
|
|
3022 }
|
|
|
3023
|
|
|
3024 static Lisp_Object
|
|
|
3025 convert_eol_canonicalize_after_coding (struct coding_stream *str)
|
|
|
3026 {
|
|
|
3027 struct convert_eol_coding_stream *data =
|
|
|
3028 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
3029
|
|
|
3030 if (str->direction == CODING_ENCODE)
|
|
|
3031 return str->codesys;
|
|
|
3032
|
|
|
3033 switch (data->actual)
|
|
|
3034 {
|
|
|
3035 case EOL_LF: return Fget_coding_system (Qconvert_eol_lf);
|
|
|
3036 case EOL_CRLF: return Fget_coding_system (Qconvert_eol_crlf);
|
|
|
3037 case EOL_CR: return Fget_coding_system (Qconvert_eol_cr);
|
|
|
3038 case EOL_AUTODETECT: return str->codesys;
|
|
|
3039 default: abort (); return Qnil;
|
|
|
3040 }
|
|
|
3041 }
|
|
|
3042
|
|
|
3043
|
|
|
3044 /************************************************************************/
|
|
|
3045 /* Undecided methods */
|
|
|
3046 /************************************************************************/
|
|
|
3047
|
|
|
3048 /* Do autodetection. We can autodetect the EOL type only, the coding
|
|
|
3049 system only, or both. We only do autodetection when decoding; when
|
|
|
3050 encoding, we just pass the data through.
|
|
|
3051
|
|
|
3052 When doing just EOL detection, a coding system can be specified; if so,
|
|
|
3053 we will decode this data through the coding system before doing EOL
|
|
|
3054 detection. The reason for specifying this is so that
|
|
|
3055 canonicalize-after-coding works: We will canonicalize the specified
|
|
|
3056 coding system into the appropriate EOL type. When doing both coding and
|
|
|
3057 EOL detection, we do similar canonicalization, and also catch situations
|
|
|
3058 where the EOL type is overspecified, i.e. the detected coding system
|
|
|
3059 specifies an EOL type, and either switch to the equivalent
|
|
|
3060 non-EOL-processing coding system (if possible), or terminate EOL
|
|
|
3061 detection and use the specified EOL type. This prevents data from being
|
|
|
3062 EOL-processed twice.
|
|
|
3063 */
|
|
|
3064
|
|
|
3065 struct undecided_coding_system
|
|
|
3066 {
|
|
|
3067 int do_eol, do_coding;
|
|
|
3068 Lisp_Object cs;
|
|
|
3069 };
|
|
|
3070
|
|
|
3071 struct undecided_coding_stream
|
|
|
3072 {
|
|
|
3073 Lisp_Object actual;
|
|
|
3074 /* Either 2 or 3 lstreams here; see undecided_convert */
|
|
|
3075 struct chain_coding_stream c;
|
|
|
3076
|
|
|
3077 struct detection_state *st;
|
|
|
3078 };
|
|
|
3079
|
|
1204
|
3080 static const struct memory_description undecided_coding_system_description[] = {
|
|
|
3081 { XD_LISP_OBJECT, offsetof (struct undecided_coding_system, cs) },
|
|
771
|
3082 { XD_END }
|
|
|
3083 };
|
|
|
3084
|
|
1204
|
3085 static const struct memory_description undecided_coding_stream_description_1 [] = {
|
|
|
3086 { XD_LISP_OBJECT, offsetof (struct undecided_coding_stream, actual) },
|
|
2367
|
3087 { XD_BLOCK_ARRAY, offsetof (struct undecided_coding_stream, c),
|
|
1204
|
3088 1, &chain_coding_stream_description },
|
|
|
3089 { XD_END }
|
|
|
3090 };
|
|
|
3091
|
|
|
3092 const struct sized_memory_description undecided_coding_stream_description = {
|
|
|
3093 sizeof (struct undecided_coding_stream), undecided_coding_stream_description_1
|
|
|
3094 };
|
|
|
3095
|
|
|
3096 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (undecided);
|
|
|
3097
|
|
771
|
3098 static void
|
|
|
3099 undecided_init (Lisp_Object codesys)
|
|
|
3100 {
|
|
|
3101 struct undecided_coding_system *data =
|
|
|
3102 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3103
|
|
|
3104 data->cs = Qnil;
|
|
|
3105 }
|
|
|
3106
|
|
|
3107 static void
|
|
|
3108 undecided_mark (Lisp_Object codesys)
|
|
|
3109 {
|
|
|
3110 struct undecided_coding_system *data =
|
|
|
3111 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3112
|
|
|
3113 mark_object (data->cs);
|
|
|
3114 }
|
|
|
3115
|
|
|
3116 static void
|
|
|
3117 undecided_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
3118 {
|
|
|
3119 struct undecided_coding_system *data =
|
|
|
3120 XCODING_SYSTEM_TYPE_DATA (cs, undecided);
|
|
|
3121 int need_space = 0;
|
|
|
3122
|
|
826
|
3123 write_c_string (printcharfun, "(");
|
|
771
|
3124 if (data->do_eol)
|
|
|
3125 {
|
|
826
|
3126 write_c_string (printcharfun, "do-eol");
|
|
771
|
3127 need_space = 1;
|
|
|
3128 }
|
|
|
3129 if (data->do_coding)
|
|
|
3130 {
|
|
|
3131 if (need_space)
|
|
826
|
3132 write_c_string (printcharfun, " ");
|
|
|
3133 write_c_string (printcharfun, "do-coding");
|
|
771
|
3134 need_space = 1;
|
|
|
3135 }
|
|
|
3136 if (!NILP (data->cs))
|
|
|
3137 {
|
|
|
3138 if (need_space)
|
|
826
|
3139 write_c_string (printcharfun, " ");
|
|
|
3140 write_c_string (printcharfun, "coding-system=");
|
|
771
|
3141 print_coding_system_in_print_method (data->cs, printcharfun, escapeflag);
|
|
|
3142 }
|
|
826
|
3143 write_c_string (printcharfun, ")");
|
|
771
|
3144 }
|
|
|
3145
|
|
|
3146 static void
|
|
|
3147 undecided_mark_coding_stream (struct coding_stream *str)
|
|
|
3148 {
|
|
1204
|
3149 mark_object (CODING_STREAM_TYPE_DATA (str, undecided)->actual);
|
|
771
|
3150 chain_mark_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3151 }
|
|
|
3152
|
|
|
3153 static int
|
|
|
3154 undecided_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
|
3155 {
|
|
|
3156 struct undecided_coding_system *data =
|
|
|
3157 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3158
|
|
|
3159 if (EQ (key, Qdo_eol))
|
|
|
3160 data->do_eol = 1;
|
|
|
3161 else if (EQ (key, Qdo_coding))
|
|
|
3162 data->do_coding = 1;
|
|
|
3163 else if (EQ (key, Qcoding_system))
|
|
|
3164 data->cs = get_coding_system_for_text_file (value, 0);
|
|
|
3165 else
|
|
|
3166 return 0;
|
|
|
3167 return 1;
|
|
|
3168 }
|
|
|
3169
|
|
|
3170 static Lisp_Object
|
|
|
3171 undecided_getprop (Lisp_Object codesys, Lisp_Object prop)
|
|
|
3172 {
|
|
|
3173 struct undecided_coding_system *data =
|
|
|
3174 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3175
|
|
|
3176 if (EQ (prop, Qdo_eol))
|
|
|
3177 return data->do_eol ? Qt : Qnil;
|
|
|
3178 if (EQ (prop, Qdo_coding))
|
|
|
3179 return data->do_coding ? Qt : Qnil;
|
|
|
3180 if (EQ (prop, Qcoding_system))
|
|
|
3181 return data->cs;
|
|
|
3182 return Qunbound;
|
|
|
3183 }
|
|
|
3184
|
|
|
3185 static struct detection_state *
|
|
|
3186 allocate_detection_state (void)
|
|
|
3187 {
|
|
|
3188 int i;
|
|
|
3189 Bytecount size = MAX_ALIGN_SIZE (sizeof (struct detection_state));
|
|
|
3190 struct detection_state *block;
|
|
|
3191
|
|
|
3192 for (i = 0; i < coding_detector_count; i++)
|
|
|
3193 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size);
|
|
|
3194
|
|
|
3195 block = (struct detection_state *) xmalloc_and_zero (size);
|
|
|
3196
|
|
|
3197 size = MAX_ALIGN_SIZE (sizeof (struct detection_state));
|
|
|
3198 for (i = 0; i < coding_detector_count; i++)
|
|
|
3199 {
|
|
|
3200 block->data_offset[i] = size;
|
|
|
3201 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size);
|
|
|
3202 }
|
|
|
3203
|
|
|
3204 return block;
|
|
|
3205 }
|
|
|
3206
|
|
|
3207 static void
|
|
|
3208 free_detection_state (struct detection_state *st)
|
|
|
3209 {
|
|
|
3210 int i;
|
|
|
3211
|
|
|
3212 for (i = 0; i < coding_detector_count; i++)
|
|
|
3213 {
|
|
|
3214 if (Dynarr_at (all_coding_detectors, i).finalize_detection_state_method)
|
|
|
3215 Dynarr_at (all_coding_detectors, i).finalize_detection_state_method
|
|
|
3216 (st);
|
|
|
3217 }
|
|
|
3218
|
|
1726
|
3219 xfree (st, struct detection_state *);
|
|
771
|
3220 }
|
|
|
3221
|
|
|
3222 static int
|
|
|
3223 coding_category_symbol_to_id (Lisp_Object symbol)
|
|
428
|
3224 {
|
|
|
3225 int i;
|
|
|
3226
|
|
|
3227 CHECK_SYMBOL (symbol);
|
|
771
|
3228 for (i = 0; i < coding_detector_count; i++)
|
|
|
3229 {
|
|
|
3230 detector_category_dynarr *cats =
|
|
|
3231 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
3232 int j;
|
|
|
3233
|
|
|
3234 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
3235 if (EQ (Dynarr_at (cats, j).sym, symbol))
|
|
|
3236 return Dynarr_at (cats, j).id;
|
|
|
3237 }
|
|
|
3238
|
|
563
|
3239 invalid_constant ("Unrecognized coding category", symbol);
|
|
1204
|
3240 RETURN_NOT_REACHED (0);
|
|
428
|
3241 }
|
|
|
3242
|
|
771
|
3243 static Lisp_Object
|
|
|
3244 coding_category_id_to_symbol (int id)
|
|
428
|
3245 {
|
|
|
3246 int i;
|
|
771
|
3247
|
|
|
3248 for (i = 0; i < coding_detector_count; i++)
|
|
|
3249 {
|
|
|
3250 detector_category_dynarr *cats =
|
|
|
3251 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
3252 int j;
|
|
|
3253
|
|
|
3254 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
3255 if (id == Dynarr_at (cats, j).id)
|
|
|
3256 return Dynarr_at (cats, j).sym;
|
|
|
3257 }
|
|
|
3258
|
|
|
3259 abort ();
|
|
|
3260 return Qnil; /* (usually) not reached */
|
|
428
|
3261 }
|
|
|
3262
|
|
771
|
3263 static Lisp_Object
|
|
|
3264 detection_result_number_to_symbol (enum detection_result result)
|
|
428
|
3265 {
|
|
1494
|
3266 /* let compiler warn if not all enumerators are handled */
|
|
|
3267 switch (result) {
|
|
|
3268 #define FROB(sym, num) case num: return (sym)
|
|
771
|
3269 FROB (Qnear_certainty, DET_NEAR_CERTAINTY);
|
|
|
3270 FROB (Qquite_probable, DET_QUITE_PROBABLE);
|
|
|
3271 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY);
|
|
1494
|
3272 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY);
|
|
771
|
3273 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY);
|
|
|
3274 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY);
|
|
|
3275 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE);
|
|
|
3276 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE);
|
|
|
3277 #undef FROB
|
|
1494
|
3278 }
|
|
771
|
3279
|
|
|
3280 abort ();
|
|
|
3281 return Qnil; /* (usually) not reached */
|
|
|
3282 }
|
|
|
3283
|
|
778
|
3284 #if 0 /* not used */
|
|
771
|
3285 static enum detection_result
|
|
|
3286 detection_result_symbol_to_number (Lisp_Object symbol)
|
|
|
3287 {
|
|
1494
|
3288 /* using switch here would be bad style, and doesn't help */
|
|
771
|
3289 #define FROB(sym, num) if (EQ (symbol, sym)) return (num)
|
|
|
3290 FROB (Qnear_certainty, DET_NEAR_CERTAINTY);
|
|
|
3291 FROB (Qquite_probable, DET_QUITE_PROBABLE);
|
|
|
3292 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY);
|
|
1494
|
3293 FROB (Qslightly_likely, DET_SLIGHTLY_LIKELY);
|
|
771
|
3294 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY);
|
|
|
3295 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY);
|
|
|
3296 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE);
|
|
|
3297 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE);
|
|
|
3298 #undef FROB
|
|
|
3299
|
|
|
3300 invalid_constant ("Unrecognized detection result", symbol);
|
|
|
3301 return ((enum detection_result) 0); /* not reached */
|
|
|
3302 }
|
|
778
|
3303 #endif /* 0 */
|
|
771
|
3304
|
|
|
3305 /* Set all detection results for a given detector to a specified value. */
|
|
|
3306 void
|
|
|
3307 set_detection_results (struct detection_state *st, int detector, int given)
|
|
|
3308 {
|
|
|
3309 detector_category_dynarr *cats =
|
|
|
3310 Dynarr_at (all_coding_detectors, detector).cats;
|
|
|
3311 int i;
|
|
|
3312
|
|
|
3313 for (i = 0; i < Dynarr_length (cats); i++)
|
|
|
3314 st->categories[Dynarr_at (cats, i).id] = given;
|
|
|
3315 }
|
|
428
|
3316
|
|
|
3317 static int
|
|
|
3318 acceptable_control_char_p (int c)
|
|
|
3319 {
|
|
|
3320 switch (c)
|
|
|
3321 {
|
|
|
3322 /* Allow and ignore control characters that you might
|
|
|
3323 reasonably see in a text file */
|
|
|
3324 case '\r':
|
|
|
3325 case '\n':
|
|
|
3326 case '\t':
|
|
|
3327 case 7: /* bell */
|
|
|
3328 case 8: /* backspace */
|
|
|
3329 case 11: /* vertical tab */
|
|
|
3330 case 12: /* form feed */
|
|
|
3331 case 26: /* MS-DOS C-z junk */
|
|
|
3332 case 31: /* '^_' -- for info */
|
|
|
3333 return 1;
|
|
|
3334 default:
|
|
|
3335 return 0;
|
|
|
3336 }
|
|
|
3337 }
|
|
|
3338
|
|
771
|
3339 #ifdef DEBUG_XEMACS
|
|
|
3340
|
|
|
3341 static UExtbyte
|
|
|
3342 hex_digit_to_char (int digit)
|
|
428
|
3343 {
|
|
771
|
3344 if (digit < 10)
|
|
|
3345 return digit + '0';
|
|
|
3346 else
|
|
|
3347 return digit - 10 + 'A';
|
|
428
|
3348 }
|
|
|
3349
|
|
771
|
3350 static void
|
|
|
3351 output_bytes_in_ascii_and_hex (const UExtbyte *src, Bytecount n)
|
|
428
|
3352 {
|
|
771
|
3353 UExtbyte *ascii = alloca_array (UExtbyte, n + 1);
|
|
|
3354 UExtbyte *hex = alloca_array (UExtbyte, 3 * n + 1);
|
|
|
3355 int i;
|
|
|
3356
|
|
|
3357 for (i = 0; i < n; i++)
|
|
428
|
3358 {
|
|
771
|
3359 UExtbyte c = src[i];
|
|
|
3360 if (c < 0x20)
|
|
|
3361 ascii[i] = '.';
|
|
428
|
3362 else
|
|
771
|
3363 ascii[i] = c;
|
|
|
3364 hex[3 * i] = hex_digit_to_char (c >> 4);
|
|
|
3365 hex[3 * i + 1] = hex_digit_to_char (c & 0xF);
|
|
|
3366 hex[3 * i + 2] = ' ';
|
|
428
|
3367 }
|
|
771
|
3368 ascii[i] = '\0';
|
|
|
3369 hex[3 * i - 1] = '\0';
|
|
|
3370 stderr_out ("%s %s", ascii, hex);
|
|
428
|
3371 }
|
|
|
3372
|
|
771
|
3373 #endif /* DEBUG_XEMACS */
|
|
|
3374
|
|
|
3375 /* Attempt to determine the encoding of the given text. Before calling
|
|
|
3376 this function for the first time, you must zero out the detection state.
|
|
428
|
3377
|
|
|
3378 Returns:
|
|
|
3379
|
|
771
|
3380 0 == keep going
|
|
|
3381 1 == stop
|
|
428
|
3382 */
|
|
|
3383
|
|
|
3384 static int
|
|
771
|
3385 detect_coding_type (struct detection_state *st, const UExtbyte *src,
|
|
|
3386 Bytecount n)
|
|
428
|
3387 {
|
|
771
|
3388 Bytecount n2 = n;
|
|
|
3389 const UExtbyte *src2 = src;
|
|
|
3390 int i;
|
|
|
3391
|
|
|
3392 #ifdef DEBUG_XEMACS
|
|
|
3393 if (!NILP (Vdebug_coding_detection))
|
|
|
3394 {
|
|
|
3395 int bytes = min (16, n);
|
|
|
3396 stderr_out ("detect_coding_type: processing %ld bytes\n", n);
|
|
|
3397 stderr_out ("First %d: ", bytes);
|
|
|
3398 output_bytes_in_ascii_and_hex (src, bytes);
|
|
|
3399 stderr_out ("\nLast %d: ", bytes);
|
|
|
3400 output_bytes_in_ascii_and_hex (src + n - bytes, bytes);
|
|
|
3401 stderr_out ("\n");
|
|
|
3402 }
|
|
|
3403 #endif /* DEBUG_XEMACS */
|
|
428
|
3404 if (!st->seen_non_ascii)
|
|
|
3405 {
|
|
771
|
3406 for (; n2; n2--, src2++)
|
|
428
|
3407 {
|
|
771
|
3408 UExtbyte c = *src2;
|
|
428
|
3409 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
3410 {
|
|
|
3411 st->seen_non_ascii = 1;
|
|
|
3412 break;
|
|
|
3413 }
|
|
|
3414 }
|
|
|
3415 }
|
|
|
3416
|
|
771
|
3417 for (i = 0; i < coding_detector_count; i++)
|
|
|
3418 Dynarr_at (all_coding_detectors, i).detect_method (st, src, n);
|
|
|
3419
|
|
|
3420 st->bytes_seen += n;
|
|
|
3421
|
|
|
3422 #ifdef DEBUG_XEMACS
|
|
|
3423 if (!NILP (Vdebug_coding_detection))
|
|
|
3424 {
|
|
|
3425 stderr_out ("seen_non_ascii: %d\n", st->seen_non_ascii);
|
|
1494
|
3426 if (coding_detector_category_count <= 0)
|
|
|
3427 stderr_out ("found %d detector categories\n",
|
|
|
3428 coding_detector_category_count);
|
|
771
|
3429 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3430 stderr_out_lisp
|
|
|
3431 ("%s: %s\n",
|
|
|
3432 2,
|
|
|
3433 coding_category_id_to_symbol (i),
|
|
|
3434 detection_result_number_to_symbol ((enum detection_result)
|
|
|
3435 st->categories[i]));
|
|
|
3436 }
|
|
|
3437 #endif /* DEBUG_XEMACS */
|
|
|
3438
|
|
|
3439 {
|
|
|
3440 int not_unlikely = 0;
|
|
|
3441 int retval;
|
|
|
3442
|
|
|
3443 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3444 if (st->categories[i] >= 0)
|
|
|
3445 not_unlikely++;
|
|
|
3446
|
|
|
3447 retval = (not_unlikely <= 1
|
|
|
3448 #if 0 /* this is bogus */
|
|
|
3449 || st->bytes_seen >= MAX_BYTES_PROCESSED_FOR_DETECTION
|
|
428
|
3450 #endif
|
|
771
|
3451 );
|
|
|
3452
|
|
|
3453 #ifdef DEBUG_XEMACS
|
|
|
3454 if (!NILP (Vdebug_coding_detection))
|
|
|
3455 stderr_out ("detect_coding_type: returning %d (%s)\n",
|
|
|
3456 retval, retval ? "stop" : "keep going");
|
|
|
3457 #endif /* DEBUG_XEMACS */
|
|
|
3458
|
|
|
3459 return retval;
|
|
428
|
3460 }
|
|
|
3461 }
|
|
|
3462
|
|
|
3463 static Lisp_Object
|
|
771
|
3464 detected_coding_system (struct detection_state *st)
|
|
428
|
3465 {
|
|
771
|
3466 int i;
|
|
|
3467 int even = 1;
|
|
|
3468
|
|
|
3469 if (st->seen_non_ascii)
|
|
|
3470 {
|
|
|
3471 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3472 if (st->categories[i] != DET_AS_LIKELY_AS_UNLIKELY)
|
|
|
3473 {
|
|
|
3474 even = 0;
|
|
|
3475 break;
|
|
|
3476 }
|
|
|
3477 }
|
|
|
3478
|
|
|
3479 /* #### Here we are ignoring the results of detection when it's all
|
|
|
3480 ASCII. This is obviously a bad thing. But we need to fix up the
|
|
|
3481 existing detection methods somewhat before we can switch. */
|
|
|
3482 if (even)
|
|
428
|
3483 {
|
|
|
3484 /* If the file was entirely or basically ASCII, use the
|
|
|
3485 default value of `buffer-file-coding-system'. */
|
|
|
3486 Lisp_Object retval =
|
|
|
3487 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
|
3488 if (!NILP (retval))
|
|
|
3489 {
|
|
771
|
3490 retval = find_coding_system_for_text_file (retval, 0);
|
|
428
|
3491 if (NILP (retval))
|
|
|
3492 {
|
|
|
3493 warn_when_safe
|
|
|
3494 (Qbad_variable, Qwarning,
|
|
|
3495 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
3496 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
|
3497 }
|
|
|
3498 }
|
|
|
3499 if (NILP (retval))
|
|
|
3500 retval = Fget_coding_system (Qraw_text);
|
|
|
3501 return retval;
|
|
|
3502 }
|
|
|
3503 else
|
|
|
3504 {
|
|
771
|
3505 int likelihood;
|
|
|
3506 Lisp_Object retval = Qnil;
|
|
|
3507
|
|
|
3508 /* Look through the coding categories first by likelihood and then by
|
|
|
3509 priority and find the first one that is allowed. */
|
|
|
3510
|
|
|
3511 for (likelihood = DET_HIGHEST; likelihood >= DET_LOWEST; likelihood--)
|
|
428
|
3512 {
|
|
771
|
3513 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3514 {
|
|
|
3515 int cat = coding_category_by_priority[i];
|
|
|
3516 if (st->categories[cat] == likelihood &&
|
|
|
3517 !NILP (coding_category_system[cat]))
|
|
|
3518 {
|
|
|
3519 retval = (get_coding_system_for_text_file
|
|
|
3520 (coding_category_system[cat], 0));
|
|
|
3521 if (likelihood < DET_AS_LIKELY_AS_UNLIKELY)
|
|
|
3522 warn_when_safe_lispobj
|
|
|
3523 (intern ("detection"),
|
|
793
|
3524 Qwarning,
|
|
771
|
3525 emacs_sprintf_string_lisp
|
|
|
3526 (
|
|
|
3527 "Detected coding %s is unlikely to be correct (likelihood == `%s')",
|
|
|
3528 Qnil, 2, XCODING_SYSTEM_NAME (retval),
|
|
|
3529 detection_result_number_to_symbol
|
|
|
3530 ((enum detection_result) likelihood)));
|
|
|
3531 return retval;
|
|
|
3532 }
|
|
|
3533 }
|
|
428
|
3534 }
|
|
771
|
3535
|
|
|
3536 return Fget_coding_system (Qraw_text);
|
|
428
|
3537 }
|
|
|
3538 }
|
|
|
3539
|
|
1347
|
3540 /* Look for a coding system in the string (skipping over leading
|
|
|
3541 blanks). If found, return it, otherwise nil. */
|
|
|
3542
|
|
|
3543 static Lisp_Object
|
|
|
3544 snarf_coding_system (const Ibyte *p, Bytecount len)
|
|
|
3545 {
|
|
|
3546 Bytecount n;
|
|
|
3547 Ibyte *name;
|
|
|
3548
|
|
|
3549 while (*p == ' ' || *p == '\t') p++, len--;
|
|
|
3550 len = min (len, 1000);
|
|
|
3551 name = alloca_ibytes (len + 1);
|
|
|
3552 memcpy (name, p, len);
|
|
|
3553 name[len] = '\0';
|
|
|
3554
|
|
|
3555 /* Get coding system name */
|
|
|
3556 /* Characters valid in a MIME charset name (rfc 1521),
|
|
|
3557 and in a Lisp symbol name. */
|
|
|
3558 n = qxestrspn (name,
|
|
|
3559 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
3560 "abcdefghijklmnopqrstuvwxyz"
|
|
|
3561 "0123456789"
|
|
|
3562 "!$%&*+-.^_{|}~");
|
|
|
3563 if (n > 0)
|
|
|
3564 {
|
|
|
3565 name[n] = '\0';
|
|
|
3566 return find_coding_system_for_text_file (intern_int (name), 0);
|
|
|
3567 }
|
|
|
3568
|
|
|
3569 return Qnil;
|
|
|
3570 }
|
|
|
3571
|
|
428
|
3572 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
3573 as specified, do any autodetection that is called for. If the
|
|
|
3574 coding system and/or EOL type are not `autodetect', they will be left
|
|
|
3575 alone; but this function will never return an autodetect coding system
|
|
|
3576 or EOL type.
|
|
|
3577
|
|
|
3578 This function does not automatically fetch subsidiary coding systems;
|
|
|
3579 that should be unnecessary with the explicit eol-type argument. */
|
|
|
3580
|
|
|
3581 #define LENGTH(string_constant) (sizeof (string_constant) - 1)
|
|
|
3582
|
|
771
|
3583 static Lisp_Object
|
|
|
3584 unwind_free_detection_state (Lisp_Object opaque)
|
|
|
3585 {
|
|
|
3586 struct detection_state *st =
|
|
|
3587 (struct detection_state *) get_opaque_ptr (opaque);
|
|
|
3588 free_detection_state (st);
|
|
|
3589 free_opaque_ptr (opaque);
|
|
|
3590 return Qnil;
|
|
|
3591 }
|
|
|
3592
|
|
1347
|
3593 /* #### This duplicates code in `find-coding-system-magic-cookie-in-file'
|
|
|
3594 in files.el. Look into combining them. */
|
|
|
3595
|
|
771
|
3596 static Lisp_Object
|
|
|
3597 look_for_coding_system_magic_cookie (const UExtbyte *data, Bytecount len)
|
|
428
|
3598 {
|
|
771
|
3599 const UExtbyte *p;
|
|
|
3600 const UExtbyte *scan_end;
|
|
|
3601
|
|
|
3602 /* Look for initial "-*-"; mode line prefix */
|
|
|
3603 for (p = data,
|
|
|
3604 scan_end = data + len - LENGTH ("-*-coding:?-*-");
|
|
|
3605 p <= scan_end
|
|
|
3606 && *p != '\n'
|
|
|
3607 && *p != '\r';
|
|
|
3608 p++)
|
|
|
3609 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
3610 {
|
|
|
3611 const UExtbyte *local_vars_beg = p + 3;
|
|
|
3612 /* Look for final "-*-"; mode line suffix */
|
|
|
3613 for (p = local_vars_beg,
|
|
|
3614 scan_end = data + len - LENGTH ("-*-");
|
|
|
3615 p <= scan_end
|
|
428
|
3616 && *p != '\n'
|
|
|
3617 && *p != '\r';
|
|
771
|
3618 p++)
|
|
|
3619 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
3620 {
|
|
|
3621 const UExtbyte *suffix = p;
|
|
|
3622 /* Look for "coding:" */
|
|
|
3623 for (p = local_vars_beg,
|
|
|
3624 scan_end = suffix - LENGTH ("coding:?");
|
|
|
3625 p <= scan_end;
|
|
|
3626 p++)
|
|
|
3627 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0
|
|
|
3628 && (p == local_vars_beg
|
|
|
3629 || (*(p-1) == ' ' ||
|
|
|
3630 *(p-1) == '\t' ||
|
|
|
3631 *(p-1) == ';')))
|
|
|
3632 {
|
|
|
3633 p += LENGTH ("coding:");
|
|
1347
|
3634 return snarf_coding_system (p, suffix - p);
|
|
771
|
3635 break;
|
|
|
3636 }
|
|
|
3637 break;
|
|
|
3638 }
|
|
|
3639 break;
|
|
|
3640 }
|
|
|
3641
|
|
1348
|
3642 #if 0
|
|
|
3643 /* #### Totally wrong as is, rewrite */
|
|
1347
|
3644 /* Look for initial ;;;###coding system */
|
|
|
3645
|
|
|
3646 {
|
|
|
3647 Bytecount ind = fast_string_match (QScoding_system_cookie,
|
|
|
3648 data, Qnil, 0, len, 0, ERROR_ME_NOT,
|
|
|
3649 1);
|
|
|
3650 if (ind >= 0)
|
|
|
3651 return
|
|
|
3652 snarf_coding_system (data + ind + LENGTH (";;;###coding system: "),
|
|
|
3653 len - ind - LENGTH (";;;###coding system: "));
|
|
|
3654 }
|
|
1348
|
3655 #endif /* 0 */
|
|
1347
|
3656
|
|
|
3657 return Qnil;
|
|
771
|
3658 }
|
|
|
3659
|
|
|
3660 static Lisp_Object
|
|
|
3661 determine_real_coding_system (Lstream *stream)
|
|
|
3662 {
|
|
|
3663 struct detection_state *st = allocate_detection_state ();
|
|
|
3664 int depth = record_unwind_protect (unwind_free_detection_state,
|
|
|
3665 make_opaque_ptr (st));
|
|
|
3666 UExtbyte buf[4096];
|
|
|
3667 Bytecount nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
3668 Lisp_Object coding_system = look_for_coding_system_magic_cookie (buf, nread);
|
|
|
3669
|
|
|
3670 if (NILP (coding_system))
|
|
|
3671 {
|
|
|
3672 while (1)
|
|
|
3673 {
|
|
|
3674 if (detect_coding_type (st, buf, nread))
|
|
428
|
3675 break;
|
|
771
|
3676 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
3677 if (nread == 0)
|
|
|
3678 break;
|
|
428
|
3679 }
|
|
771
|
3680
|
|
|
3681 coding_system = detected_coding_system (st);
|
|
428
|
3682 }
|
|
|
3683
|
|
|
3684 Lstream_rewind (stream);
|
|
771
|
3685
|
|
|
3686 unbind_to (depth);
|
|
|
3687 return coding_system;
|
|
|
3688 }
|
|
|
3689
|
|
|
3690 static void
|
|
|
3691 undecided_init_coding_stream (struct coding_stream *str)
|
|
|
3692 {
|
|
|
3693 struct undecided_coding_stream *data =
|
|
|
3694 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3695 struct undecided_coding_system *csdata =
|
|
|
3696 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided);
|
|
|
3697
|
|
|
3698 data->actual = Qnil;
|
|
|
3699
|
|
|
3700 if (str->direction == CODING_DECODE)
|
|
|
3701 {
|
|
|
3702 Lstream *lst = str->other_end;
|
|
|
3703
|
|
|
3704 if ((lst->flags & LSTREAM_FL_READ) &&
|
|
|
3705 Lstream_seekable_p (lst) &&
|
|
|
3706 csdata->do_coding)
|
|
|
3707 /* We can determine the coding system now. */
|
|
|
3708 data->actual = determine_real_coding_system (lst);
|
|
|
3709 }
|
|
1494
|
3710
|
|
|
3711 #ifdef DEBUG_XEMACS
|
|
|
3712 if (!NILP (Vdebug_coding_detection))
|
|
|
3713 stderr_out_lisp ("detected coding system: %s\n", 1, data->actual);
|
|
|
3714 #endif /* DEBUG_XEMACS */
|
|
771
|
3715 }
|
|
|
3716
|
|
|
3717 static void
|
|
|
3718 undecided_rewind_coding_stream (struct coding_stream *str)
|
|
|
3719 {
|
|
|
3720 chain_rewind_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3721 }
|
|
|
3722
|
|
|
3723 static void
|
|
|
3724 undecided_finalize_coding_stream (struct coding_stream *str)
|
|
|
3725 {
|
|
|
3726 struct undecided_coding_stream *data =
|
|
|
3727 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3728
|
|
|
3729 chain_finalize_coding_stream_1
|
|
|
3730 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3731 if (data->st)
|
|
|
3732 free_detection_state (data->st);
|
|
|
3733 }
|
|
|
3734
|
|
|
3735 static Lisp_Object
|
|
|
3736 undecided_canonicalize (Lisp_Object codesys)
|
|
|
3737 {
|
|
|
3738 struct undecided_coding_system *csdata =
|
|
|
3739 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3740 if (!csdata->do_eol && !csdata->do_coding)
|
|
|
3741 return NILP (csdata->cs) ? Fget_coding_system (Qbinary) : csdata->cs;
|
|
|
3742 if (csdata->do_eol && !csdata->do_coding && NILP (csdata->cs))
|
|
|
3743 return Fget_coding_system (Qconvert_eol_autodetect);
|
|
|
3744 return codesys;
|
|
|
3745 }
|
|
|
3746
|
|
|
3747 static Bytecount
|
|
|
3748 undecided_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
3749 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
3750 {
|
|
|
3751 int first_time = 0;
|
|
|
3752
|
|
|
3753 if (str->direction == CODING_DECODE)
|
|
|
3754 {
|
|
|
3755 /* At this point, we have only the following possibilities:
|
|
|
3756
|
|
|
3757 do_eol && do_coding
|
|
|
3758 do_coding only
|
|
|
3759 do_eol only and a coding system was specified
|
|
|
3760
|
|
|
3761 Other possibilities are removed during undecided_canonicalize.
|
|
|
3762
|
|
|
3763 Therefore, our substreams are either
|
|
|
3764
|
|
|
3765 lstream_coding -> lstream_dynarr, or
|
|
|
3766 lstream_coding -> lstream_eol -> lstream_dynarr.
|
|
|
3767 */
|
|
|
3768 struct undecided_coding_system *csdata =
|
|
|
3769 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided);
|
|
|
3770 struct undecided_coding_stream *data =
|
|
|
3771 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3772
|
|
|
3773 if (str->eof)
|
|
|
3774 {
|
|
|
3775 /* Each will close the next. We need to close now because more
|
|
|
3776 data may be generated. */
|
|
|
3777 if (data->c.initted)
|
|
|
3778 Lstream_close (XLSTREAM (data->c.lstreams[0]));
|
|
|
3779 return n;
|
|
|
3780 }
|
|
|
3781
|
|
|
3782 if (!data->c.initted)
|
|
|
3783 {
|
|
|
3784 data->c.lstream_count = csdata->do_eol ? 3 : 2;
|
|
|
3785 data->c.lstreams = xnew_array (Lisp_Object, data->c.lstream_count);
|
|
|
3786
|
|
|
3787 data->c.lstreams[data->c.lstream_count - 1] =
|
|
|
3788 make_dynarr_output_stream (dst);
|
|
|
3789 Lstream_set_buffering
|
|
|
3790 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]),
|
|
|
3791 LSTREAM_UNBUFFERED, 0);
|
|
|
3792 if (csdata->do_eol)
|
|
|
3793 {
|
|
|
3794 data->c.lstreams[1] =
|
|
|
3795 make_coding_output_stream
|
|
|
3796 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]),
|
|
|
3797 Fget_coding_system (Qconvert_eol_autodetect),
|
|
800
|
3798 CODING_DECODE, 0);
|
|
771
|
3799 Lstream_set_buffering
|
|
|
3800 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3801 LSTREAM_UNBUFFERED, 0);
|
|
|
3802 }
|
|
|
3803
|
|
|
3804 data->c.lstreams[0] =
|
|
|
3805 make_coding_output_stream
|
|
|
3806 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3807 /* Substitute binary if we need to detect the encoding */
|
|
|
3808 csdata->do_coding ? Qbinary : csdata->cs,
|
|
800
|
3809 CODING_DECODE, 0);
|
|
771
|
3810 Lstream_set_buffering (XLSTREAM (data->c.lstreams[0]),
|
|
|
3811 LSTREAM_UNBUFFERED, 0);
|
|
|
3812
|
|
|
3813 first_time = 1;
|
|
|
3814 data->c.initted = 1;
|
|
|
3815 }
|
|
|
3816
|
|
|
3817 /* If necessary, do encoding-detection now. We do this when we're a
|
|
|
3818 writing stream or a non-seekable reading stream, meaning that we
|
|
|
3819 can't just process the whole input, rewind, and start over. */
|
|
|
3820
|
|
|
3821 if (csdata->do_coding)
|
|
|
3822 {
|
|
|
3823 int actual_was_nil = NILP (data->actual);
|
|
|
3824 if (NILP (data->actual))
|
|
|
3825 {
|
|
|
3826 if (!data->st)
|
|
|
3827 data->st = allocate_detection_state ();
|
|
|
3828 if (first_time)
|
|
|
3829 /* #### This is cheesy. What we really ought to do is buffer
|
|
|
3830 up a certain minimum amount of data to get a better result.
|
|
|
3831 */
|
|
|
3832 data->actual = look_for_coding_system_magic_cookie (src, n);
|
|
|
3833 if (NILP (data->actual))
|
|
|
3834 {
|
|
|
3835 /* #### This is cheesy. What we really ought to do is buffer
|
|
|
3836 up a certain minimum amount of data so as to get a less
|
|
|
3837 random result when doing subprocess detection. */
|
|
|
3838 detect_coding_type (data->st, src, n);
|
|
|
3839 data->actual = detected_coding_system (data->st);
|
|
|
3840 }
|
|
|
3841 }
|
|
|
3842 /* We need to set the detected coding system if we actually have
|
|
|
3843 such a coding system but didn't before. That is the case
|
|
|
3844 either when we just detected it in the previous code or when
|
|
|
3845 it was detected during undecided_init_coding_stream(). We
|
|
|
3846 can check for that using first_time. */
|
|
|
3847 if (!NILP (data->actual) && (actual_was_nil || first_time))
|
|
|
3848 {
|
|
|
3849 /* If the detected coding system doesn't allow for EOL
|
|
|
3850 autodetection, try to get the equivalent that does;
|
|
|
3851 otherwise, disable EOL detection (overriding whatever
|
|
|
3852 may already have been detected). */
|
|
|
3853 if (XCODING_SYSTEM_EOL_TYPE (data->actual) != EOL_AUTODETECT)
|
|
|
3854 {
|
|
|
3855 if (!NILP (XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual)))
|
|
|
3856 data->actual =
|
|
|
3857 XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual);
|
|
|
3858 else if (data->c.lstream_count == 3)
|
|
|
3859 set_coding_stream_coding_system
|
|
|
3860 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3861 Fget_coding_system (Qidentity));
|
|
|
3862 }
|
|
|
3863 set_coding_stream_coding_system
|
|
|
3864 (XLSTREAM (data->c.lstreams[0]), data->actual);
|
|
|
3865 }
|
|
|
3866 }
|
|
|
3867
|
|
|
3868 if (Lstream_write (XLSTREAM (data->c.lstreams[0]), src, n) < 0)
|
|
|
3869 return -1;
|
|
|
3870 return n;
|
|
|
3871 }
|
|
|
3872 else
|
|
|
3873 return no_conversion_convert (str, src, dst, n);
|
|
|
3874 }
|
|
|
3875
|
|
|
3876 static Lisp_Object
|
|
|
3877 undecided_canonicalize_after_coding (struct coding_stream *str)
|
|
|
3878 {
|
|
|
3879 struct undecided_coding_stream *data =
|
|
|
3880 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3881 Lisp_Object ret, eolret;
|
|
|
3882
|
|
|
3883 if (str->direction == CODING_ENCODE)
|
|
|
3884 return str->codesys;
|
|
|
3885
|
|
|
3886 if (!data->c.initted)
|
|
|
3887 return Fget_coding_system (Qundecided);
|
|
|
3888
|
|
|
3889 ret = coding_stream_canonicalize_after_coding
|
|
|
3890 (XLSTREAM (data->c.lstreams[0]));
|
|
|
3891 if (NILP (ret))
|
|
|
3892 ret = Fget_coding_system (Qundecided);
|
|
|
3893 if (XCODING_SYSTEM_EOL_TYPE (ret) != EOL_AUTODETECT)
|
|
|
3894 return ret;
|
|
|
3895 eolret = coding_stream_canonicalize_after_coding
|
|
|
3896 (XLSTREAM (data->c.lstreams[1]));
|
|
|
3897 if (!EQ (XCODING_SYSTEM_TYPE (eolret), Qconvert_eol))
|
|
|
3898 return ret;
|
|
|
3899 return
|
|
|
3900 Fsubsidiary_coding_system (ret, Fcoding_system_property (eolret,
|
|
|
3901 Qsubtype));
|
|
|
3902 }
|
|
|
3903
|
|
|
3904
|
|
|
3905 /************************************************************************/
|
|
|
3906 /* Lisp interface: Coding category functions and detection */
|
|
|
3907 /************************************************************************/
|
|
|
3908
|
|
|
3909 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
3910 Return a list of all recognized coding categories.
|
|
|
3911 */
|
|
|
3912 ())
|
|
|
3913 {
|
|
|
3914 int i;
|
|
|
3915 Lisp_Object list = Qnil;
|
|
|
3916
|
|
|
3917 for (i = 0; i < coding_detector_count; i++)
|
|
|
3918 {
|
|
|
3919 detector_category_dynarr *cats =
|
|
|
3920 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
3921 int j;
|
|
|
3922
|
|
|
3923 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
3924 list = Fcons (Dynarr_at (cats, j).sym, list);
|
|
|
3925 }
|
|
|
3926
|
|
|
3927 return Fnreverse (list);
|
|
|
3928 }
|
|
|
3929
|
|
|
3930 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
3931 Change the priority order of the coding categories.
|
|
|
3932 LIST should be list of coding categories, in descending order of
|
|
|
3933 priority. Unspecified coding categories will be lower in priority
|
|
|
3934 than all specified ones, in the same relative order they were in
|
|
|
3935 previously.
|
|
|
3936 */
|
|
|
3937 (list))
|
|
|
3938 {
|
|
|
3939 int *category_to_priority =
|
|
|
3940 alloca_array (int, coding_detector_category_count);
|
|
|
3941 int i, j;
|
|
|
3942
|
|
|
3943 /* First generate a list that maps coding categories to priorities. */
|
|
|
3944
|
|
|
3945 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3946 category_to_priority[i] = -1;
|
|
|
3947
|
|
|
3948 /* Highest priority comes from the specified list. */
|
|
|
3949 i = 0;
|
|
2367
|
3950 {
|
|
|
3951 EXTERNAL_LIST_LOOP_2 (elt, list)
|
|
|
3952 {
|
|
|
3953 int cat = coding_category_symbol_to_id (elt);
|
|
|
3954
|
|
|
3955 if (category_to_priority[cat] >= 0)
|
|
|
3956 sferror ("Duplicate coding category in list", elt);
|
|
|
3957 category_to_priority[cat] = i++;
|
|
|
3958 }
|
|
|
3959 }
|
|
771
|
3960
|
|
|
3961 /* Now go through the existing categories by priority to retrieve
|
|
|
3962 the categories not yet specified and preserve their priority
|
|
|
3963 order. */
|
|
|
3964 for (j = 0; j < coding_detector_category_count; j++)
|
|
|
3965 {
|
|
|
3966 int cat = coding_category_by_priority[j];
|
|
|
3967 if (category_to_priority[cat] < 0)
|
|
|
3968 category_to_priority[cat] = i++;
|
|
|
3969 }
|
|
|
3970
|
|
|
3971 /* Now we need to construct the inverse of the mapping we just
|
|
|
3972 constructed. */
|
|
|
3973
|
|
|
3974 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3975 coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
3976
|
|
|
3977 /* Phew! That was confusing. */
|
|
|
3978 return Qnil;
|
|
|
3979 }
|
|
|
3980
|
|
|
3981 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
3982 Return a list of coding categories in descending order of priority.
|
|
|
3983 */
|
|
|
3984 ())
|
|
|
3985 {
|
|
|
3986 int i;
|
|
|
3987 Lisp_Object list = Qnil;
|
|
|
3988
|
|
|
3989 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3990 list =
|
|
|
3991 Fcons (coding_category_id_to_symbol (coding_category_by_priority[i]),
|
|
|
3992 list);
|
|
|
3993 return Fnreverse (list);
|
|
|
3994 }
|
|
|
3995
|
|
|
3996 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
3997 Change the coding system associated with a coding category.
|
|
|
3998 */
|
|
|
3999 (coding_category, coding_system))
|
|
|
4000 {
|
|
|
4001 coding_category_system[coding_category_symbol_to_id (coding_category)] =
|
|
|
4002 Fget_coding_system (coding_system);
|
|
|
4003 return Qnil;
|
|
|
4004 }
|
|
|
4005
|
|
|
4006 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
4007 Return the coding system associated with a coding category.
|
|
|
4008 */
|
|
|
4009 (coding_category))
|
|
|
4010 {
|
|
|
4011 Lisp_Object sys =
|
|
|
4012 coding_category_system[coding_category_symbol_to_id (coding_category)];
|
|
|
4013
|
|
|
4014 if (!NILP (sys))
|
|
|
4015 return XCODING_SYSTEM_NAME (sys);
|
|
|
4016 return Qnil;
|
|
|
4017 }
|
|
|
4018
|
|
800
|
4019 /* Detect the encoding of STREAM. Assumes stream is at the begnning and will
|
|
|
4020 read through to the end of STREAM, leaving it there but open. */
|
|
|
4021
|
|
771
|
4022 Lisp_Object
|
|
|
4023 detect_coding_stream (Lisp_Object stream)
|
|
|
4024 {
|
|
|
4025 Lisp_Object val = Qnil;
|
|
|
4026 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4027 UExtbyte random_buffer[65536];
|
|
|
4028 Lisp_Object binary_instream =
|
|
|
4029 make_coding_input_stream
|
|
|
4030 (XLSTREAM (stream), Qbinary,
|
|
814
|
4031 CODING_ENCODE, LSTREAM_FL_NO_CLOSE_OTHER);
|
|
771
|
4032 Lisp_Object decstream =
|
|
|
4033 make_coding_input_stream
|
|
|
4034 (XLSTREAM (binary_instream),
|
|
800
|
4035 Qundecided, CODING_DECODE, 0);
|
|
771
|
4036 Lstream *decstr = XLSTREAM (decstream);
|
|
|
4037
|
|
|
4038 GCPRO3 (decstream, stream, binary_instream);
|
|
|
4039 /* Read and discard all data; detection happens as a side effect of this,
|
|
|
4040 and we examine what was detected afterwards. */
|
|
|
4041 while (Lstream_read (decstr, random_buffer, sizeof (random_buffer)) > 0)
|
|
|
4042 ;
|
|
|
4043
|
|
|
4044 val = coding_stream_detected_coding_system (decstr);
|
|
|
4045 Lstream_close (decstr);
|
|
|
4046 Lstream_delete (decstr);
|
|
|
4047 Lstream_delete (XLSTREAM (binary_instream));
|
|
|
4048 UNGCPRO;
|
|
|
4049 return val;
|
|
428
|
4050 }
|
|
|
4051
|
|
|
4052 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
4053 Detect coding system of the text in the region between START and END.
|
|
444
|
4054 Return a list of possible coding systems ordered by priority.
|
|
|
4055 If only ASCII characters are found, return 'undecided or one of
|
|
428
|
4056 its subsidiary coding systems according to a detected end-of-line
|
|
|
4057 type. Optional arg BUFFER defaults to the current buffer.
|
|
|
4058 */
|
|
|
4059 (start, end, buffer))
|
|
|
4060 {
|
|
|
4061 Lisp_Object val = Qnil;
|
|
|
4062 struct buffer *buf = decode_buffer (buffer, 0);
|
|
665
|
4063 Charbpos b, e;
|
|
771
|
4064 Lisp_Object lb_instream;
|
|
428
|
4065
|
|
|
4066 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
4067 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
771
|
4068
|
|
|
4069 val = detect_coding_stream (lb_instream);
|
|
|
4070 Lstream_delete (XLSTREAM (lb_instream));
|
|
428
|
4071 return val;
|
|
|
4072 }
|
|
|
4073
|
|
|
4074
|
|
771
|
4075
|
|
|
4076 #ifdef DEBUG_XEMACS
|
|
|
4077
|
|
428
|
4078 /************************************************************************/
|
|
771
|
4079 /* Internal methods */
|
|
|
4080 /************************************************************************/
|
|
|
4081
|
|
|
4082 /* Raw (internally-formatted) data. */
|
|
|
4083 DEFINE_CODING_SYSTEM_TYPE (internal);
|
|
428
|
4084
|
|
665
|
4085 static Bytecount
|
|
2286
|
4086 internal_convert (struct coding_stream *UNUSED (str), const UExtbyte *src,
|
|
771
|
4087 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
4088 {
|
|
|
4089 Bytecount orign = n;
|
|
|
4090 Dynarr_add_many (dst, src, n);
|
|
|
4091 return orign;
|
|
|
4092 }
|
|
|
4093
|
|
|
4094 #endif /* DEBUG_XEMACS */
|
|
|
4095
|
|
|
4096
|
|
|
4097
|
|
|
4098 #ifdef HAVE_ZLIB
|
|
|
4099
|
|
|
4100 /************************************************************************/
|
|
|
4101 /* Gzip methods */
|
|
|
4102 /************************************************************************/
|
|
|
4103
|
|
|
4104 struct gzip_coding_system
|
|
428
|
4105 {
|
|
771
|
4106 int level; /* 0 through 9, or -1 for default */
|
|
|
4107 };
|
|
|
4108
|
|
|
4109 #define CODING_SYSTEM_GZIP_LEVEL(codesys) \
|
|
|
4110 (CODING_SYSTEM_TYPE_DATA (codesys, gzip)->level)
|
|
|
4111 #define XCODING_SYSTEM_GZIP_LEVEL(codesys) \
|
|
|
4112 (XCODING_SYSTEM_TYPE_DATA (codesys, gzip)->level)
|
|
|
4113
|
|
|
4114 struct gzip_coding_stream
|
|
428
|
4115 {
|
|
771
|
4116 z_stream stream;
|
|
|
4117 int stream_initted;
|
|
|
4118 int reached_eof; /* #### this should be handled by the caller, once we
|
|
|
4119 return LSTREAM_EOF */
|
|
|
4120 };
|
|
|
4121
|
|
1204
|
4122 static const struct memory_description
|
|
771
|
4123 gzip_coding_system_description[] = {
|
|
|
4124 { XD_END }
|
|
|
4125 };
|
|
|
4126
|
|
1204
|
4127 DEFINE_CODING_SYSTEM_TYPE_WITH_DATA (gzip);
|
|
|
4128
|
|
771
|
4129 enum source_sink_type
|
|
|
4130 gzip_conversion_end_type (Lisp_Object codesys)
|
|
|
4131 {
|
|
|
4132 return DECODES_BYTE_TO_BYTE;
|
|
428
|
4133 }
|
|
|
4134
|
|
|
4135 static void
|
|
771
|
4136 gzip_init (Lisp_Object codesys)
|
|
|
4137 {
|
|
|
4138 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip);
|
|
|
4139 data->level = -1;
|
|
|
4140 }
|
|
|
4141
|
|
|
4142 static void
|
|
|
4143 gzip_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
428
|
4144 {
|
|
771
|
4145 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (cs, gzip);
|
|
|
4146
|
|
826
|
4147 write_c_string (printcharfun, "(");
|
|
771
|
4148 if (data->level == -1)
|
|
826
|
4149 write_c_string (printcharfun, "default");
|
|
771
|
4150 else
|
|
|
4151 print_internal (make_int (data->level), printcharfun, 0);
|
|
826
|
4152 write_c_string (printcharfun, ")");
|
|
428
|
4153 }
|
|
|
4154
|
|
|
4155 static int
|
|
771
|
4156 gzip_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
428
|
4157 {
|
|
771
|
4158 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip);
|
|
|
4159
|
|
|
4160 if (EQ (key, Qlevel))
|
|
428
|
4161 {
|
|
771
|
4162 if (EQ (value, Qdefault))
|
|
|
4163 data->level = -1;
|
|
|
4164 else
|
|
428
|
4165 {
|
|
771
|
4166 CHECK_INT (value);
|
|
|
4167 check_int_range (XINT (value), 0, 9);
|
|
|
4168 data->level = XINT (value);
|
|
428
|
4169 }
|
|
|
4170 }
|
|
|
4171 else
|
|
771
|
4172 return 0;
|
|
|
4173 return 1;
|
|
428
|
4174 }
|
|
|
4175
|
|
|
4176 static Lisp_Object
|
|
771
|
4177 gzip_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
428
|
4178 {
|
|
771
|
4179 struct gzip_coding_system *data =
|
|
|
4180 XCODING_SYSTEM_TYPE_DATA (coding_system, gzip);
|
|
|
4181
|
|
|
4182 if (EQ (prop, Qlevel))
|
|
428
|
4183 {
|
|
771
|
4184 if (data->level == -1)
|
|
|
4185 return Qdefault;
|
|
|
4186 return make_int (data->level);
|
|
428
|
4187 }
|
|
771
|
4188
|
|
|
4189 return Qunbound;
|
|
428
|
4190 }
|
|
|
4191
|
|
|
4192 static void
|
|
771
|
4193 gzip_init_coding_stream (struct coding_stream *str)
|
|
428
|
4194 {
|
|
771
|
4195 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip);
|
|
|
4196 if (data->stream_initted)
|
|
428
|
4197 {
|
|
771
|
4198 if (str->direction == CODING_DECODE)
|
|
|
4199 inflateEnd (&data->stream);
|
|
|
4200 else
|
|
|
4201 deflateEnd (&data->stream);
|
|
|
4202 data->stream_initted = 0;
|
|
428
|
4203 }
|
|
771
|
4204 data->reached_eof = 0;
|
|
428
|
4205 }
|
|
|
4206
|
|
|
4207 static void
|
|
771
|
4208 gzip_rewind_coding_stream (struct coding_stream *str)
|
|
428
|
4209 {
|
|
771
|
4210 gzip_init_coding_stream (str);
|
|
428
|
4211 }
|
|
|
4212
|
|
771
|
4213 static Bytecount
|
|
|
4214 gzip_convert (struct coding_stream *str,
|
|
|
4215 const UExtbyte *src,
|
|
|
4216 unsigned_char_dynarr *dst, Bytecount n)
|
|
428
|
4217 {
|
|
771
|
4218 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip);
|
|
|
4219 int zerr;
|
|
|
4220 if (str->direction == CODING_DECODE)
|
|
428
|
4221 {
|
|
771
|
4222 if (data->reached_eof)
|
|
|
4223 return n; /* eat the data */
|
|
|
4224
|
|
|
4225 if (!data->stream_initted)
|
|
428
|
4226 {
|
|
771
|
4227 xzero (data->stream);
|
|
|
4228 if (inflateInit (&data->stream) != Z_OK)
|
|
|
4229 return LSTREAM_ERROR;
|
|
|
4230 data->stream_initted = 1;
|
|
428
|
4231 }
|
|
771
|
4232
|
|
|
4233 data->stream.next_in = (Bytef *) src;
|
|
|
4234 data->stream.avail_in = n;
|
|
|
4235
|
|
|
4236 /* Normally we stop when we've fed all data to the decompressor; but
|
|
|
4237 if we're at the end of the input, and the decompressor hasn't
|
|
|
4238 reported EOF, we need to keep going, as there might be more output
|
|
|
4239 to generate. Z_OK from the decompressor means input was processed
|
|
|
4240 or output was generated; if neither, we break out of the loop.
|
|
|
4241 Other return values are:
|
|
|
4242
|
|
|
4243 Z_STREAM_END EOF from decompressor
|
|
|
4244 Z_DATA_ERROR Corrupted data
|
|
|
4245 Z_BUF_ERROR No progress possible (this should happen if
|
|
|
4246 we try to feed it an incomplete file)
|
|
|
4247 Z_MEM_ERROR Out of memory
|
|
|
4248 Z_STREAM_ERROR (should never happen)
|
|
|
4249 Z_NEED_DICT (#### when will this happen?)
|
|
|
4250 */
|
|
|
4251 while (data->stream.avail_in > 0 || str->eof)
|
|
|
4252 {
|
|
|
4253 /* Reserve an output buffer of the same size as the input buffer;
|
|
|
4254 if that's not enough, we keep reserving the same size. */
|
|
|
4255 Bytecount reserved = n;
|
|
|
4256 Dynarr_add_many (dst, 0, reserved);
|
|
|
4257 /* Careful here! Don't retrieve the pointer until after
|
|
|
4258 reserving the space, or it might be bogus */
|
|
|
4259 data->stream.next_out =
|
|
|
4260 Dynarr_atp (dst, Dynarr_length (dst) - reserved);
|
|
|
4261 data->stream.avail_out = reserved;
|
|
|
4262 zerr = inflate (&data->stream, Z_NO_FLUSH);
|
|
|
4263 /* Lop off the unused portion */
|
|
|
4264 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out);
|
|
|
4265 if (zerr != Z_OK)
|
|
|
4266 break;
|
|
|
4267 }
|
|
|
4268
|
|
|
4269 if (zerr == Z_STREAM_END)
|
|
|
4270 data->reached_eof = 1;
|
|
|
4271
|
|
|
4272 if ((Bytecount) data->stream.avail_in < n)
|
|
|
4273 return n - data->stream.avail_in;
|
|
|
4274
|
|
|
4275 if (zerr == Z_OK || zerr == Z_STREAM_END)
|
|
|
4276 return 0;
|
|
|
4277
|
|
|
4278 return LSTREAM_ERROR;
|
|
428
|
4279 }
|
|
|
4280 else
|
|
|
4281 {
|
|
771
|
4282 if (!data->stream_initted)
|
|
|
4283 {
|
|
|
4284 int level = XCODING_SYSTEM_GZIP_LEVEL (str->codesys);
|
|
|
4285 xzero (data->stream);
|
|
|
4286 if (deflateInit (&data->stream,
|
|
|
4287 level == -1 ? Z_DEFAULT_COMPRESSION : level) !=
|
|
|
4288 Z_OK)
|
|
|
4289 return LSTREAM_ERROR;
|
|
|
4290 data->stream_initted = 1;
|
|
428
|
4291 }
|
|
771
|
4292
|
|
|
4293 data->stream.next_in = (Bytef *) src;
|
|
|
4294 data->stream.avail_in = n;
|
|
|
4295
|
|
|
4296 /* Normally we stop when we've fed all data to the compressor; but if
|
|
|
4297 we're at the end of the input, and the compressor hasn't reported
|
|
|
4298 EOF, we need to keep going, as there might be more output to
|
|
|
4299 generate. (To signal EOF on our end, we set the FLUSH parameter
|
|
|
4300 to Z_FINISH; when all data is output, Z_STREAM_END will be
|
|
|
4301 returned.) Z_OK from the compressor means input was processed or
|
|
|
4302 output was generated; if neither, we break out of the loop. Other
|
|
|
4303 return values are:
|
|
|
4304
|
|
|
4305 Z_STREAM_END EOF from compressor
|
|
|
4306 Z_BUF_ERROR No progress possible (should never happen)
|
|
|
4307 Z_STREAM_ERROR (should never happen)
|
|
|
4308 */
|
|
|
4309 while (data->stream.avail_in > 0 || str->eof)
|
|
|
4310 {
|
|
|
4311 /* Reserve an output buffer of the same size as the input buffer;
|
|
|
4312 if that's not enough, we keep reserving the same size. */
|
|
|
4313 Bytecount reserved = n;
|
|
|
4314 Dynarr_add_many (dst, 0, reserved);
|
|
|
4315 /* Careful here! Don't retrieve the pointer until after
|
|
|
4316 reserving the space, or it might be bogus */
|
|
|
4317 data->stream.next_out =
|
|
|
4318 Dynarr_atp (dst, Dynarr_length (dst) - reserved);
|
|
|
4319 data->stream.avail_out = reserved;
|
|
|
4320 zerr =
|
|
|
4321 deflate (&data->stream,
|
|
|
4322 str->eof ? Z_FINISH : Z_NO_FLUSH);
|
|
|
4323 /* Lop off the unused portion */
|
|
|
4324 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out);
|
|
|
4325 if (zerr != Z_OK)
|
|
|
4326 break;
|
|
|
4327 }
|
|
|
4328
|
|
|
4329 if ((Bytecount) data->stream.avail_in < n)
|
|
|
4330 return n - data->stream.avail_in;
|
|
|
4331
|
|
|
4332 if (zerr == Z_OK || zerr == Z_STREAM_END)
|
|
|
4333 return 0;
|
|
|
4334
|
|
|
4335 return LSTREAM_ERROR;
|
|
428
|
4336 }
|
|
|
4337 }
|
|
|
4338
|
|
771
|
4339 #endif /* HAVE_ZLIB */
|
|
428
|
4340
|
|
|
4341
|
|
|
4342 /************************************************************************/
|
|
|
4343 /* Initialization */
|
|
|
4344 /************************************************************************/
|
|
|
4345
|
|
|
4346 void
|
|
|
4347 syms_of_file_coding (void)
|
|
|
4348 {
|
|
442
|
4349 INIT_LRECORD_IMPLEMENTATION (coding_system);
|
|
|
4350
|
|
771
|
4351 DEFSUBR (Fvalid_coding_system_type_p);
|
|
|
4352 DEFSUBR (Fcoding_system_type_list);
|
|
428
|
4353 DEFSUBR (Fcoding_system_p);
|
|
|
4354 DEFSUBR (Ffind_coding_system);
|
|
|
4355 DEFSUBR (Fget_coding_system);
|
|
|
4356 DEFSUBR (Fcoding_system_list);
|
|
|
4357 DEFSUBR (Fcoding_system_name);
|
|
|
4358 DEFSUBR (Fmake_coding_system);
|
|
|
4359 DEFSUBR (Fcopy_coding_system);
|
|
440
|
4360 DEFSUBR (Fcoding_system_canonical_name_p);
|
|
|
4361 DEFSUBR (Fcoding_system_alias_p);
|
|
|
4362 DEFSUBR (Fcoding_system_aliasee);
|
|
428
|
4363 DEFSUBR (Fdefine_coding_system_alias);
|
|
|
4364 DEFSUBR (Fsubsidiary_coding_system);
|
|
771
|
4365 DEFSUBR (Fcoding_system_base);
|
|
|
4366 DEFSUBR (Fcoding_system_used_for_io);
|
|
428
|
4367
|
|
|
4368 DEFSUBR (Fcoding_system_type);
|
|
771
|
4369 DEFSUBR (Fcoding_system_description);
|
|
428
|
4370 DEFSUBR (Fcoding_system_property);
|
|
|
4371
|
|
|
4372 DEFSUBR (Fcoding_category_list);
|
|
|
4373 DEFSUBR (Fset_coding_priority_list);
|
|
|
4374 DEFSUBR (Fcoding_priority_list);
|
|
|
4375 DEFSUBR (Fset_coding_category_system);
|
|
|
4376 DEFSUBR (Fcoding_category_system);
|
|
|
4377
|
|
|
4378 DEFSUBR (Fdetect_coding_region);
|
|
|
4379 DEFSUBR (Fdecode_coding_region);
|
|
|
4380 DEFSUBR (Fencode_coding_region);
|
|
563
|
4381 DEFSYMBOL_MULTIWORD_PREDICATE (Qcoding_systemp);
|
|
|
4382 DEFSYMBOL (Qno_conversion);
|
|
771
|
4383 DEFSYMBOL (Qconvert_eol);
|
|
|
4384 DEFSYMBOL (Qconvert_eol_autodetect);
|
|
|
4385 DEFSYMBOL (Qconvert_eol_lf);
|
|
|
4386 DEFSYMBOL (Qconvert_eol_cr);
|
|
|
4387 DEFSYMBOL (Qconvert_eol_crlf);
|
|
563
|
4388 DEFSYMBOL (Qraw_text);
|
|
771
|
4389
|
|
563
|
4390 DEFSYMBOL (Qmnemonic);
|
|
|
4391 DEFSYMBOL (Qeol_type);
|
|
|
4392 DEFSYMBOL (Qpost_read_conversion);
|
|
|
4393 DEFSYMBOL (Qpre_write_conversion);
|
|
|
4394
|
|
771
|
4395 DEFSYMBOL (Qtranslation_table_for_decode);
|
|
|
4396 DEFSYMBOL (Qtranslation_table_for_encode);
|
|
|
4397 DEFSYMBOL (Qsafe_chars);
|
|
|
4398 DEFSYMBOL (Qsafe_charsets);
|
|
|
4399 DEFSYMBOL (Qmime_charset);
|
|
|
4400 DEFSYMBOL (Qvalid_codes);
|
|
|
4401
|
|
563
|
4402 DEFSYMBOL (Qcr);
|
|
|
4403 DEFSYMBOL (Qlf);
|
|
|
4404 DEFSYMBOL (Qcrlf);
|
|
|
4405 DEFSYMBOL (Qeol_cr);
|
|
|
4406 DEFSYMBOL (Qeol_lf);
|
|
|
4407 DEFSYMBOL (Qeol_crlf);
|
|
|
4408 DEFSYMBOL (Qencode);
|
|
|
4409 DEFSYMBOL (Qdecode);
|
|
428
|
4410
|
|
771
|
4411 DEFSYMBOL (Qnear_certainty);
|
|
|
4412 DEFSYMBOL (Qquite_probable);
|
|
|
4413 DEFSYMBOL (Qsomewhat_likely);
|
|
1494
|
4414 DEFSYMBOL (Qslightly_likely);
|
|
771
|
4415 DEFSYMBOL (Qas_likely_as_unlikely);
|
|
|
4416 DEFSYMBOL (Qsomewhat_unlikely);
|
|
|
4417 DEFSYMBOL (Qquite_improbable);
|
|
|
4418 DEFSYMBOL (Qnearly_impossible);
|
|
|
4419
|
|
|
4420 DEFSYMBOL (Qdo_eol);
|
|
|
4421 DEFSYMBOL (Qdo_coding);
|
|
|
4422
|
|
|
4423 DEFSYMBOL (Qcanonicalize_after_coding);
|
|
|
4424
|
|
|
4425 DEFSYMBOL (Qescape_quoted);
|
|
|
4426
|
|
|
4427 #ifdef HAVE_ZLIB
|
|
|
4428 DEFSYMBOL (Qgzip);
|
|
|
4429 #endif
|
|
|
4430
|
|
428
|
4431 }
|
|
|
4432
|
|
|
4433 void
|
|
|
4434 lstream_type_create_file_coding (void)
|
|
|
4435 {
|
|
771
|
4436 LSTREAM_HAS_METHOD (coding, reader);
|
|
|
4437 LSTREAM_HAS_METHOD (coding, writer);
|
|
|
4438 LSTREAM_HAS_METHOD (coding, rewinder);
|
|
|
4439 LSTREAM_HAS_METHOD (coding, seekable_p);
|
|
|
4440 LSTREAM_HAS_METHOD (coding, marker);
|
|
|
4441 LSTREAM_HAS_METHOD (coding, flusher);
|
|
|
4442 LSTREAM_HAS_METHOD (coding, closer);
|
|
|
4443 LSTREAM_HAS_METHOD (coding, finalizer);
|
|
|
4444 }
|
|
|
4445
|
|
|
4446 void
|
|
|
4447 coding_system_type_create (void)
|
|
|
4448 {
|
|
|
4449 int i;
|
|
|
4450
|
|
|
4451 staticpro (&Vcoding_system_hash_table);
|
|
|
4452 Vcoding_system_hash_table =
|
|
|
4453 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
4454
|
|
|
4455 the_coding_system_type_entry_dynarr = Dynarr_new (coding_system_type_entry);
|
|
2367
|
4456 dump_add_root_block_ptr (&the_coding_system_type_entry_dynarr,
|
|
771
|
4457 &csted_description);
|
|
|
4458
|
|
|
4459 Vcoding_system_type_list = Qnil;
|
|
|
4460 staticpro (&Vcoding_system_type_list);
|
|
|
4461
|
|
|
4462 /* Initialize to something reasonable ... */
|
|
|
4463 for (i = 0; i < MAX_DETECTOR_CATEGORIES; i++)
|
|
|
4464 {
|
|
|
4465 coding_category_system[i] = Qnil;
|
|
1204
|
4466 dump_add_root_lisp_object (&coding_category_system[i]);
|
|
771
|
4467 coding_category_by_priority[i] = i;
|
|
|
4468 }
|
|
|
4469
|
|
|
4470 dump_add_opaque (coding_category_by_priority,
|
|
|
4471 sizeof (coding_category_by_priority));
|
|
|
4472
|
|
|
4473 all_coding_detectors = Dynarr_new2 (detector_dynarr, struct detector);
|
|
2367
|
4474 dump_add_root_block_ptr (&all_coding_detectors,
|
|
771
|
4475 &detector_dynarr_description);
|
|
|
4476
|
|
|
4477 dump_add_opaque_int (&coding_system_tick);
|
|
|
4478 dump_add_opaque_int (&coding_detector_count);
|
|
|
4479 dump_add_opaque_int (&coding_detector_category_count);
|
|
|
4480
|
|
|
4481 INITIALIZE_CODING_SYSTEM_TYPE (no_conversion,
|
|
|
4482 "no-conversion-coding-system-p");
|
|
|
4483 CODING_SYSTEM_HAS_METHOD (no_conversion, convert);
|
|
|
4484
|
|
|
4485 INITIALIZE_DETECTOR (no_conversion);
|
|
|
4486 DETECTOR_HAS_METHOD (no_conversion, detect);
|
|
|
4487 INITIALIZE_DETECTOR_CATEGORY (no_conversion, no_conversion);
|
|
|
4488
|
|
|
4489 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol,
|
|
|
4490 "convert-eol-coding-system-p");
|
|
|
4491 CODING_SYSTEM_HAS_METHOD (convert_eol, print);
|
|
|
4492 CODING_SYSTEM_HAS_METHOD (convert_eol, convert);
|
|
|
4493 CODING_SYSTEM_HAS_METHOD (convert_eol, getprop);
|
|
|
4494 CODING_SYSTEM_HAS_METHOD (convert_eol, putprop);
|
|
|
4495 CODING_SYSTEM_HAS_METHOD (convert_eol, conversion_end_type);
|
|
|
4496 CODING_SYSTEM_HAS_METHOD (convert_eol, canonicalize_after_coding);
|
|
|
4497 CODING_SYSTEM_HAS_METHOD (convert_eol, init_coding_stream);
|
|
|
4498
|
|
|
4499 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (undecided,
|
|
|
4500 "undecided-coding-system-p");
|
|
|
4501 CODING_SYSTEM_HAS_METHOD (undecided, init);
|
|
|
4502 CODING_SYSTEM_HAS_METHOD (undecided, mark);
|
|
|
4503 CODING_SYSTEM_HAS_METHOD (undecided, print);
|
|
|
4504 CODING_SYSTEM_HAS_METHOD (undecided, convert);
|
|
|
4505 CODING_SYSTEM_HAS_METHOD (undecided, putprop);
|
|
|
4506 CODING_SYSTEM_HAS_METHOD (undecided, getprop);
|
|
|
4507 CODING_SYSTEM_HAS_METHOD (undecided, init_coding_stream);
|
|
|
4508 CODING_SYSTEM_HAS_METHOD (undecided, rewind_coding_stream);
|
|
|
4509 CODING_SYSTEM_HAS_METHOD (undecided, finalize_coding_stream);
|
|
|
4510 CODING_SYSTEM_HAS_METHOD (undecided, mark_coding_stream);
|
|
|
4511 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize);
|
|
|
4512 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize_after_coding);
|
|
|
4513
|
|
|
4514 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (chain, "chain-coding-system-p");
|
|
|
4515
|
|
|
4516 CODING_SYSTEM_HAS_METHOD (chain, print);
|
|
|
4517 CODING_SYSTEM_HAS_METHOD (chain, canonicalize);
|
|
|
4518 CODING_SYSTEM_HAS_METHOD (chain, init);
|
|
|
4519 CODING_SYSTEM_HAS_METHOD (chain, mark);
|
|
|
4520 CODING_SYSTEM_HAS_METHOD (chain, mark_coding_stream);
|
|
|
4521 CODING_SYSTEM_HAS_METHOD (chain, convert);
|
|
|
4522 CODING_SYSTEM_HAS_METHOD (chain, rewind_coding_stream);
|
|
|
4523 CODING_SYSTEM_HAS_METHOD (chain, finalize_coding_stream);
|
|
|
4524 CODING_SYSTEM_HAS_METHOD (chain, finalize);
|
|
|
4525 CODING_SYSTEM_HAS_METHOD (chain, putprop);
|
|
|
4526 CODING_SYSTEM_HAS_METHOD (chain, getprop);
|
|
|
4527 CODING_SYSTEM_HAS_METHOD (chain, conversion_end_type);
|
|
|
4528 CODING_SYSTEM_HAS_METHOD (chain, canonicalize_after_coding);
|
|
|
4529
|
|
|
4530 #ifdef DEBUG_XEMACS
|
|
|
4531 INITIALIZE_CODING_SYSTEM_TYPE (internal, "internal-coding-system-p");
|
|
|
4532 CODING_SYSTEM_HAS_METHOD (internal, convert);
|
|
|
4533 #endif
|
|
|
4534
|
|
|
4535 #ifdef HAVE_ZLIB
|
|
|
4536 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (gzip, "gzip-coding-system-p");
|
|
|
4537 CODING_SYSTEM_HAS_METHOD (gzip, conversion_end_type);
|
|
|
4538 CODING_SYSTEM_HAS_METHOD (gzip, convert);
|
|
|
4539 CODING_SYSTEM_HAS_METHOD (gzip, init);
|
|
|
4540 CODING_SYSTEM_HAS_METHOD (gzip, print);
|
|
|
4541 CODING_SYSTEM_HAS_METHOD (gzip, init_coding_stream);
|
|
|
4542 CODING_SYSTEM_HAS_METHOD (gzip, rewind_coding_stream);
|
|
|
4543 CODING_SYSTEM_HAS_METHOD (gzip, putprop);
|
|
|
4544 CODING_SYSTEM_HAS_METHOD (gzip, getprop);
|
|
|
4545 #endif
|
|
|
4546 }
|
|
|
4547
|
|
|
4548 void
|
|
|
4549 reinit_coding_system_type_create (void)
|
|
|
4550 {
|
|
|
4551 REINITIALIZE_CODING_SYSTEM_TYPE (no_conversion);
|
|
|
4552 REINITIALIZE_CODING_SYSTEM_TYPE (convert_eol);
|
|
|
4553 REINITIALIZE_CODING_SYSTEM_TYPE (undecided);
|
|
|
4554 REINITIALIZE_CODING_SYSTEM_TYPE (chain);
|
|
|
4555 #if 0
|
|
|
4556 REINITIALIZE_CODING_SYSTEM_TYPE (text_file_wrapper);
|
|
|
4557 #endif /* 0 */
|
|
|
4558 #ifdef DEBUG_XEMACS
|
|
|
4559 REINITIALIZE_CODING_SYSTEM_TYPE (internal);
|
|
|
4560 #endif
|
|
|
4561 #ifdef HAVE_ZLIB
|
|
|
4562 REINITIALIZE_CODING_SYSTEM_TYPE (gzip);
|
|
|
4563 #endif
|
|
|
4564 }
|
|
|
4565
|
|
|
4566 void
|
|
|
4567 reinit_vars_of_file_coding (void)
|
|
|
4568 {
|
|
428
|
4569 }
|
|
|
4570
|
|
|
4571 void
|
|
|
4572 vars_of_file_coding (void)
|
|
|
4573 {
|
|
771
|
4574 /* We always have file-coding support */
|
|
428
|
4575 Fprovide (intern ("file-coding"));
|
|
|
4576
|
|
1347
|
4577 QScoding_system_cookie = build_string (";;;###coding system: ");
|
|
|
4578 staticpro (&QScoding_system_cookie);
|
|
|
4579
|
|
1242
|
4580 #ifdef HAVE_DEFAULT_EOL_DETECTION
|
|
2297
|
4581 /* #### Find a more appropriate place for this comment.
|
|
|
4582 WARNING: The existing categories are intimately tied to the function
|
|
1242
|
4583 `coding-system-category' in coding.el. If you change a category, or
|
|
|
4584 change the layout of any coding system associated with a category, you
|
|
|
4585 need to check that function and make sure it's written properly. */
|
|
|
4586
|
|
|
4587 Fprovide (intern ("unix-default-eol-detection"));
|
|
|
4588 #endif
|
|
|
4589
|
|
428
|
4590 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
4591 Coding system used for TTY keyboard input.
|
|
|
4592 Not used under a windowing system.
|
|
|
4593 */ );
|
|
|
4594 Vkeyboard_coding_system = Qnil;
|
|
|
4595
|
|
|
4596 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
4597 Coding system used for TTY display output.
|
|
|
4598 Not used under a windowing system.
|
|
|
4599 */ );
|
|
|
4600 Vterminal_coding_system = Qnil;
|
|
|
4601
|
|
|
4602 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
440
|
4603 Overriding coding system used when reading from a file or process.
|
|
|
4604 You should bind this variable with `let', but do not set it globally.
|
|
|
4605 If this is non-nil, it specifies the coding system that will be used
|
|
|
4606 to decode input on read operations, such as from a file or process.
|
|
|
4607 It overrides `buffer-file-coding-system-for-read',
|
|
428
|
4608 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
440
|
4609 this one for permanent changes to the environment. */ );
|
|
428
|
4610 Vcoding_system_for_read = Qnil;
|
|
|
4611
|
|
|
4612 DEFVAR_LISP ("coding-system-for-write",
|
|
|
4613 &Vcoding_system_for_write /*
|
|
440
|
4614 Overriding coding system used when writing to a file or process.
|
|
|
4615 You should bind this variable with `let', but do not set it globally.
|
|
|
4616 If this is non-nil, it specifies the coding system that will be used
|
|
|
4617 to encode output for write operations, such as to a file or process.
|
|
|
4618 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
|
|
|
4619 Use those variables instead of this one for permanent changes to the
|
|
|
4620 environment. */ );
|
|
428
|
4621 Vcoding_system_for_write = Qnil;
|
|
|
4622
|
|
|
4623 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
|
4624 Coding system used to convert pathnames when accessing files.
|
|
|
4625 */ );
|
|
|
4626 Vfile_name_coding_system = Qnil;
|
|
|
4627
|
|
|
4628 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
771
|
4629 Setting this has no effect. It is purely for FSF compatibility.
|
|
428
|
4630 */ );
|
|
|
4631 enable_multibyte_characters = 1;
|
|
771
|
4632
|
|
|
4633 Vchain_canonicalize_hash_table =
|
|
|
4634 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL);
|
|
|
4635 staticpro (&Vchain_canonicalize_hash_table);
|
|
|
4636
|
|
|
4637 #ifdef DEBUG_XEMACS
|
|
|
4638 DEFVAR_LISP ("debug-coding-detection", &Vdebug_coding_detection /*
|
|
|
4639 If non-nil, display debug information about detection operations in progress.
|
|
|
4640 Information is displayed on stderr.
|
|
|
4641 */ );
|
|
|
4642 Vdebug_coding_detection = Qnil;
|
|
|
4643 #endif
|
|
428
|
4644 }
|
|
|
4645
|
|
2297
|
4646 /* #### reformat this for consistent appearance? */
|
|
|
4647
|
|
428
|
4648 void
|
|
|
4649 complex_vars_of_file_coding (void)
|
|
|
4650 {
|
|
771
|
4651 Fmake_coding_system
|
|
|
4652 (Qconvert_eol_cr, Qconvert_eol,
|
|
|
4653 build_msg_string ("Convert CR to LF"),
|
|
|
4654 nconc2 (list6 (Qdocumentation,
|
|
|
4655 build_msg_string (
|
|
|
4656 "Converts CR (used to mark the end of a line on Macintosh systems) to LF\n"
|
|
|
4657 "(used internally and under Unix to mark the end of a line)."),
|
|
|
4658 Qmnemonic, build_string ("CR->LF"),
|
|
|
4659 Qsubtype, Qcr),
|
|
|
4660 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4661 subsidiaries -- it needs the coding systems we're creating
|
|
|
4662 to do so! */
|
|
|
4663 list2 (Qeol_type, Qlf)));
|
|
|
4664
|
|
|
4665 Fmake_coding_system
|
|
|
4666 (Qconvert_eol_lf, Qconvert_eol,
|
|
|
4667 build_msg_string ("Convert LF to LF (do nothing)"),
|
|
|
4668 nconc2 (list6 (Qdocumentation,
|
|
|
4669 build_msg_string (
|
|
|
4670 "Do nothing."),
|
|
|
4671 Qmnemonic, build_string ("LF->LF"),
|
|
|
4672 Qsubtype, Qlf),
|
|
|
4673 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4674 subsidiaries -- it needs the coding systems we're creating
|
|
|
4675 to do so! */
|
|
|
4676 list2 (Qeol_type, Qlf)));
|
|
|
4677
|
|
|
4678 Fmake_coding_system
|
|
|
4679 (Qconvert_eol_crlf, Qconvert_eol,
|
|
|
4680 build_msg_string ("Convert CRLF to LF"),
|
|
|
4681 nconc2 (list6 (Qdocumentation,
|
|
|
4682 build_msg_string (
|
|
|
4683 "Converts CR+LF (used to mark the end of a line on Macintosh systems) to LF\n"
|
|
|
4684 "(used internally and under Unix to mark the end of a line)."),
|
|
|
4685 Qmnemonic, build_string ("CRLF->LF"),
|
|
|
4686 Qsubtype, Qcrlf),
|
|
|
4687 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4688 subsidiaries -- it needs the coding systems we're creating
|
|
|
4689 to do so! */
|
|
|
4690 list2 (Qeol_type, Qlf)));
|
|
|
4691
|
|
|
4692 Fmake_coding_system
|
|
|
4693 (Qconvert_eol_autodetect, Qconvert_eol,
|
|
|
4694 build_msg_string ("Autodetect EOL type"),
|
|
|
4695 nconc2 (list6 (Qdocumentation,
|
|
|
4696 build_msg_string (
|
|
|
4697 "Autodetect the end-of-line type."),
|
|
|
4698 Qmnemonic, build_string ("Auto-EOL"),
|
|
793
|
4699 Qsubtype, Qnil),
|
|
771
|
4700 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4701 subsidiaries -- it needs the coding systems we're creating
|
|
|
4702 to do so! */
|
|
|
4703 list2 (Qeol_type, Qlf)));
|
|
|
4704
|
|
|
4705 Fmake_coding_system
|
|
|
4706 (Qundecided, Qundecided,
|
|
|
4707 build_msg_string ("Undecided (auto-detect)"),
|
|
|
4708 nconc2 (list4 (Qdocumentation,
|
|
|
4709 build_msg_string
|
|
|
4710 ("Automatically detects the correct encoding."),
|
|
|
4711 Qmnemonic, build_string ("Auto")),
|
|
|
4712 list6 (Qdo_eol, Qt, Qdo_coding, Qt,
|
|
|
4713 /* We do EOL detection ourselves so we don't need to be
|
|
|
4714 wrapped in an EOL detector. (It doesn't actually hurt,
|
|
|
4715 though, I don't think.) */
|
|
|
4716 Qeol_type, Qlf)));
|
|
|
4717
|
|
|
4718 Fmake_coding_system
|
|
|
4719 (intern ("undecided-dos"), Qundecided,
|
|
|
4720 build_msg_string ("Undecided (auto-detect) (CRLF)"),
|
|
|
4721 nconc2 (list4 (Qdocumentation,
|
|
|
4722 build_msg_string
|
|
|
4723 ("Automatically detects the correct encoding; EOL type of CRLF forced."),
|
|
|
4724 Qmnemonic, build_string ("Auto")),
|
|
|
4725 list4 (Qdo_coding, Qt,
|
|
|
4726 Qeol_type, Qcrlf)));
|
|
|
4727
|
|
|
4728 Fmake_coding_system
|
|
|
4729 (intern ("undecided-unix"), Qundecided,
|
|
|
4730 build_msg_string ("Undecided (auto-detect) (LF)"),
|
|
|
4731 nconc2 (list4 (Qdocumentation,
|
|
|
4732 build_msg_string
|
|
|
4733 ("Automatically detects the correct encoding; EOL type of LF forced."),
|
|
|
4734 Qmnemonic, build_string ("Auto")),
|
|
|
4735 list4 (Qdo_coding, Qt,
|
|
|
4736 Qeol_type, Qlf)));
|
|
|
4737
|
|
|
4738 Fmake_coding_system
|
|
|
4739 (intern ("undecided-mac"), Qundecided,
|
|
|
4740 build_msg_string ("Undecided (auto-detect) (CR)"),
|
|
|
4741 nconc2 (list4 (Qdocumentation,
|
|
|
4742 build_msg_string
|
|
|
4743 ("Automatically detects the correct encoding; EOL type of CR forced."),
|
|
|
4744 Qmnemonic, build_string ("Auto")),
|
|
|
4745 list4 (Qdo_coding, Qt,
|
|
|
4746 Qeol_type, Qcr)));
|
|
|
4747
|
|
428
|
4748 /* Need to create this here or we're really screwed. */
|
|
|
4749 Fmake_coding_system
|
|
|
4750 (Qraw_text, Qno_conversion,
|
|
771
|
4751 build_msg_string ("Raw Text"),
|
|
|
4752 list4 (Qdocumentation,
|
|
|
4753 build_msg_string ("Raw text converts only line-break codes, and acts otherwise like `binary'."),
|
|
|
4754 Qmnemonic, build_string ("Raw")));
|
|
428
|
4755
|
|
|
4756 Fmake_coding_system
|
|
|
4757 (Qbinary, Qno_conversion,
|
|
771
|
4758 build_msg_string ("Binary"),
|
|
|
4759 list6 (Qdocumentation,
|
|
|
4760 build_msg_string (
|
|
|
4761 "This coding system is as close as it comes to doing no conversion.\n"
|
|
|
4762 "On input, each byte is converted directly into the character\n"
|
|
|
4763 "with the corresponding code -- i.e. from the `ascii', `control-1',\n"
|
|
|
4764 "or `latin-1' character sets. On output, these characters are\n"
|
|
|
4765 "converted back to the corresponding bytes, and other characters\n"
|
|
|
4766 "are converted to the default character, i.e. `~'."),
|
|
|
4767 Qeol_type, Qlf,
|
|
428
|
4768 Qmnemonic, build_string ("Binary")));
|
|
|
4769
|
|
771
|
4770 /* Formerly aliased to raw-text! Completely bogus and not even the same
|
|
|
4771 as FSF Emacs. */
|
|
|
4772 Fdefine_coding_system_alias (Qno_conversion, Qbinary);
|
|
|
4773 Fdefine_coding_system_alias (intern ("no-conversion-unix"),
|
|
|
4774 intern ("raw-text-unix"));
|
|
|
4775 Fdefine_coding_system_alias (intern ("no-conversion-dos"),
|
|
|
4776 intern ("raw-text-dos"));
|
|
|
4777 Fdefine_coding_system_alias (intern ("no-conversion-mac"),
|
|
|
4778 intern ("raw-text-mac"));
|
|
|
4779
|
|
1318
|
4780 /* These three below will get their defaults set correctly
|
|
|
4781 in code-init.el. We init them now so we can handle stuff at dump
|
|
771
|
4782 time before we get to code-init.el. */
|
|
1318
|
4783 Fdefine_coding_system_alias (Qnative, Qbinary);
|
|
440
|
4784 Fdefine_coding_system_alias (Qterminal, Qbinary);
|
|
|
4785 Fdefine_coding_system_alias (Qkeyboard, Qbinary);
|
|
|
4786
|
|
1318
|
4787 Fdefine_coding_system_alias (Qfile_name, Qnative);
|
|
771
|
4788 Fdefine_coding_system_alias (Qidentity, Qconvert_eol_lf);
|
|
|
4789
|
|
428
|
4790 /* Need this for bootstrapping */
|
|
771
|
4791 coding_category_system[detector_category_no_conversion] =
|
|
428
|
4792 Fget_coding_system (Qraw_text);
|
|
|
4793 }
|
