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70
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1 /* Code conversion functions.
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2 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.3. Not in FSF. */
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23
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298
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24 /* Rewritten by Ben Wing <ben@xemacs.org>. */
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70
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25
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259
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26 #if 0 /* while file-coding not split up */
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27
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70
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28 #include <config.h>
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29 #include "lisp.h"
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30
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31 #include "buffer.h"
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32 #include "elhash.h"
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33 #include "insdel.h"
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34 #include "lstream.h"
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213
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35 #include "mule-ccl.h"
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70
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36 #include "mule-coding.h"
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37
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110
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38 Lisp_Object Qbuffer_file_coding_system, Qcoding_system_error;
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70
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39
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40 Lisp_Object Vkeyboard_coding_system;
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41 Lisp_Object Vterminal_coding_system;
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120
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42 Lisp_Object Vcoding_system_for_read;
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43 Lisp_Object Vcoding_system_for_write;
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197
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44 Lisp_Object Vfile_name_coding_system;
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70
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45
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46 /* Table of symbols identifying each coding category. */
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47 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST + 1];
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48
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49 /* Coding system currently associated with each coding category. */
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50 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
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51
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52 /* Table of all coding categories in decreasing order of priority.
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53 This describes a permutation of the possible coding categories. */
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54 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
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55
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56 Lisp_Object Qcoding_system_p;
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57
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58 Lisp_Object Qbig5, Qshift_jis, Qno_conversion, Qccl, Qiso2022;
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59 /* Qinternal in general.c */
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60
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61 Lisp_Object Qmnemonic, Qeol_type;
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62 Lisp_Object Qcr, Qcrlf, Qlf;
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63 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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64 Lisp_Object Qpost_read_conversion;
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65 Lisp_Object Qpre_write_conversion;
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66
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67 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
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68 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
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69 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
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70 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
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71 Lisp_Object Qno_iso6429, Qescape_quoted;
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72 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
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73
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74 Lisp_Object Qencode, Qdecode;
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75
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76 Lisp_Object Qctext;
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77
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78 Lisp_Object Vcoding_system_hashtable;
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79
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114
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80 int enable_multibyte_characters;
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81
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70
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82 /* Additional information used by the ISO2022 decoder and detector. */
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83 struct iso2022_decoder
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84 {
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85 /* CHARSET holds the character sets currently assigned to the G0
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86 through G3 variables. It is initialized from the array
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87 INITIAL_CHARSET in CODESYS. */
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88 Lisp_Object charset[4];
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89
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90 /* Which registers are currently invoked into the left (GL) and
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91 right (GR) halves of the 8-bit encoding space? */
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92 int register_left, register_right;
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183
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93
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70
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94 /* ISO_ESC holds a value indicating part of an escape sequence
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95 that has already been seen. */
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96 enum iso_esc_flag esc;
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183
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97
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70
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98 /* This records the bytes we've seen so far in an escape sequence,
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99 in case the sequence is invalid (we spit out the bytes unchanged). */
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100 unsigned char esc_bytes[8];
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183
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101
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70
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102 /* Index for next byte to store in ISO escape sequence. */
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103 int esc_bytes_index;
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104
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105 /* Stuff seen so far when composing a string. */
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106 unsigned_char_dynarr *composite_chars;
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107
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108 /* If we saw an invalid designation sequence for a particular
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109 register, we flag it here and switch to ASCII. The next time we
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110 see a valid designation for this register, we turn off the flag
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111 and do the designation normally, but pretend the sequence was
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112 invalid. The effect of all this is that (most of the time) the
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113 escape sequences for both the switch to the unknown charset, and
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114 the switch back to the known charset, get inserted literally into
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115 the buffer and saved out as such. The hope is that we can
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116 preserve the escape sequences so that the resulting written out
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117 file makes sense. If we don't do any of this, the designation
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118 to the invalid charset will be preserved but that switch back
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119 to the known charset will probably get eaten because it was
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120 the same charset that was already present in the register. */
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121 unsigned char invalid_designated[4];
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122
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123 /* We try to do similar things as above for direction-switching
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124 sequences. If we encountered a direction switch while an
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125 invalid designation was present, or an invalid designation
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126 just after a direction switch (i.e. no valid designation
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127 encountered yet), we insert the direction-switch escape
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128 sequence literally into the output stream, and later on
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129 insert the corresponding direction-restoring escape sequence
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130 literally also. */
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74
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131 unsigned int switched_dir_and_no_valid_charset_yet :1;
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132 unsigned int invalid_switch_dir :1;
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70
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133
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134 /* Tells the decoder to output the escape sequence literally
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135 even though it was valid. Used in the games we play to
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136 avoid lossage when we encounter invalid designations. */
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74
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137 unsigned int output_literally :1;
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70
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138 /* We encountered a direction switch followed by an invalid
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139 designation. We didn't output the direction switch
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140 literally because we didn't know about the invalid designation;
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141 but we have to do so now. */
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74
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142 unsigned int output_direction_sequence :1;
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70
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143 };
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144
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272
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145 EXFUN (Fcopy_coding_system, 2);
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70
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146 struct detection_state;
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74
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147 static int detect_coding_sjis (struct detection_state *st,
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148 CONST unsigned char *src,
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149 unsigned int n);
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150 static void decode_coding_sjis (Lstream *decoding,
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151 CONST unsigned char *src,
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152 unsigned_char_dynarr *dst,
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153 unsigned int n);
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154 static void encode_coding_sjis (Lstream *encoding,
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155 CONST unsigned char *src,
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156 unsigned_char_dynarr *dst,
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157 unsigned int n);
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70
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158 static int detect_coding_big5 (struct detection_state *st,
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159 CONST unsigned char *src,
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160 unsigned int n);
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161 static void decode_coding_big5 (Lstream *decoding,
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162 CONST unsigned char *src,
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163 unsigned_char_dynarr *dst, unsigned int n);
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164 static void encode_coding_big5 (Lstream *encoding,
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165 CONST unsigned char *src,
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166 unsigned_char_dynarr *dst, unsigned int n);
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167 static int postprocess_iso2022_mask (int mask);
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168 static void reset_iso2022 (Lisp_Object coding_system,
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169 struct iso2022_decoder *iso);
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170 static int detect_coding_iso2022 (struct detection_state *st,
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171 CONST unsigned char *src,
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172 unsigned int n);
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173 static void decode_coding_iso2022 (Lstream *decoding,
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174 CONST unsigned char *src,
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175 unsigned_char_dynarr *dst, unsigned int n);
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176 static void encode_coding_iso2022 (Lstream *encoding,
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177 CONST unsigned char *src,
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178 unsigned_char_dynarr *dst, unsigned int n);
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179 static void decode_coding_no_conversion (Lstream *decoding,
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180 CONST unsigned char *src,
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181 unsigned_char_dynarr *dst,
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182 unsigned int n);
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183 static void encode_coding_no_conversion (Lstream *encoding,
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184 CONST unsigned char *src,
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185 unsigned_char_dynarr *dst,
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186 unsigned int n);
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187 static void mule_decode (Lstream *decoding, CONST unsigned char *src,
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188 unsigned_char_dynarr *dst, unsigned int n);
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189 static void mule_encode (Lstream *encoding, CONST unsigned char *src,
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190 unsigned_char_dynarr *dst, unsigned int n);
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191
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185
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192 typedef struct codesys_prop codesys_prop;
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70
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193 struct codesys_prop
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194 {
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195 Lisp_Object sym;
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196 int prop_type;
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197 };
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198
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185
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199 typedef struct
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70
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200 {
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185
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201 Dynarr_declare (codesys_prop);
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70
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202 } codesys_prop_dynarr;
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203
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204 codesys_prop_dynarr *the_codesys_prop_dynarr;
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205
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206 enum codesys_prop_enum
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207 {
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208 CODESYS_PROP_ALL_OK,
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209 CODESYS_PROP_ISO2022,
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210 CODESYS_PROP_CCL
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211 };
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212
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213
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214 /************************************************************************/
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215 /* Coding system functions */
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216 /************************************************************************/
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217
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218 static Lisp_Object
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219 mark_coding_system (Lisp_Object obj, void (*markobj) (Lisp_Object))
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220 {
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221 struct Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
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222
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223 (markobj) (CODING_SYSTEM_NAME (codesys));
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224 (markobj) (CODING_SYSTEM_DOC_STRING (codesys));
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225 (markobj) (CODING_SYSTEM_MNEMONIC (codesys));
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226 (markobj) (CODING_SYSTEM_EOL_LF (codesys));
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227 (markobj) (CODING_SYSTEM_EOL_CRLF (codesys));
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228 (markobj) (CODING_SYSTEM_EOL_CR (codesys));
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183
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229
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70
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230 switch (CODING_SYSTEM_TYPE (codesys))
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231 {
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181
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232 int i;
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70
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233 case CODESYS_ISO2022:
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234 for (i = 0; i < 4; i++)
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235 (markobj) (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
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236 if (codesys->iso2022.input_conv)
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237 {
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238 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
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239 {
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240 struct charset_conversion_spec *ccs =
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241 Dynarr_atp (codesys->iso2022.input_conv, i);
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242 (markobj) (ccs->from_charset);
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243 (markobj) (ccs->to_charset);
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244 }
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245 }
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246 if (codesys->iso2022.output_conv)
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247 {
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248 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
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249 {
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250 struct charset_conversion_spec *ccs =
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251 Dynarr_atp (codesys->iso2022.output_conv, i);
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252 (markobj) (ccs->from_charset);
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253 (markobj) (ccs->to_charset);
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254 }
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255 }
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256 break;
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257
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258 case CODESYS_CCL:
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259 (markobj) (CODING_SYSTEM_CCL_DECODE (codesys));
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260 (markobj) (CODING_SYSTEM_CCL_ENCODE (codesys));
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261 break;
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262 default:
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263 break;
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264 }
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265
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266 (markobj) (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
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267 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
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268 }
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269
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270 static void
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271 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
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272 int escapeflag)
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273 {
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274 struct Lisp_Coding_System *c = XCODING_SYSTEM (obj);
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275 if (print_readably)
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276 error ("printing unreadable object #<coding_system 0x%x>",
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277 c->header.uid);
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278
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279 write_c_string ("#<coding_system ", printcharfun);
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280 print_internal (c->name, printcharfun, 1);
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281 write_c_string (">", printcharfun);
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282 }
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283
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284 static void
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285 finalize_coding_system (void *header, int for_disksave)
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286 {
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287 struct Lisp_Coding_System *c = (struct Lisp_Coding_System *) header;
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288 /* Since coding systems never go away, this function is not
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289 necessary. But it would be necessary if we changed things
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290 so that coding systems could go away. */
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291 if (!for_disksave) /* see comment in lstream.c */
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292 {
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293 switch (CODING_SYSTEM_TYPE (c))
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294 {
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295 case CODESYS_ISO2022:
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296 if (c->iso2022.input_conv)
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297 {
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298 Dynarr_free (c->iso2022.input_conv);
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299 c->iso2022.input_conv = 0;
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300 }
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301 if (c->iso2022.output_conv)
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302 {
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303 Dynarr_free (c->iso2022.output_conv);
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304 c->iso2022.output_conv = 0;
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305 }
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306 break;
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307
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308 default:
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309 break;
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310 }
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311 }
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312 }
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313
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272
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314 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
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315 mark_coding_system, print_coding_system,
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316 finalize_coding_system,
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317 0, 0, struct Lisp_Coding_System);
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318
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179
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319 static enum eol_type
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70
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320 symbol_to_eol_type (Lisp_Object symbol)
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321 {
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322 CHECK_SYMBOL (symbol);
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179
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323 if (NILP (symbol)) return EOL_AUTODETECT;
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324 if (EQ (symbol, Qlf)) return EOL_LF;
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325 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
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326 if (EQ (symbol, Qcr)) return EOL_CR;
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327
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328 signal_simple_error ("Unrecognized eol type", symbol);
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329 return EOL_AUTODETECT; /* not reached */
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70
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330 }
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331
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332 static Lisp_Object
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179
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333 eol_type_to_symbol (enum eol_type type)
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70
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334 {
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179
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335 switch (type)
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70
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336 {
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337 case EOL_LF: return Qlf;
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338 case EOL_CRLF: return Qcrlf;
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339 case EOL_CR: return Qcr;
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340 case EOL_AUTODETECT: return Qnil;
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179
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341 default: abort (); return Qnil; /* not reached */
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70
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342 }
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343 }
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344
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345 static void
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346 setup_eol_coding_systems (struct Lisp_Coding_System *codesys)
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347 {
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272
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348 Lisp_Object codesys_obj;
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70
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349 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
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350 char *codesys_name = (char *) alloca (len + 7);
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351 Lisp_Object codesys_name_sym, sub_codesys_obj;
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183
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352
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70
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353 /* kludge */
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354
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355 XSETCODING_SYSTEM (codesys_obj, codesys);
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356
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357 memcpy (codesys_name,
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358 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
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183
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359
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70
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360 #define DEFINE_SUB_CODESYS(op_sys, Type) do { \
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361 strcpy (codesys_name + len, "-" op_sys); \
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362 codesys_name_sym = intern (codesys_name); \
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363 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
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364 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
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365 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
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366 } while (0)
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367
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368 DEFINE_SUB_CODESYS("unix", EOL_LF);
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369 DEFINE_SUB_CODESYS("dos", EOL_CRLF);
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370 DEFINE_SUB_CODESYS("mac", EOL_CR);
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371 }
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372
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373 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
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272
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374 Return t if OBJECT is a coding system.
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|
70
|
375 A coding system is an object that defines how text containing multiple
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|
|
376 character sets is encoded into a stream of (typically 8-bit) bytes.
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377 The coding system is used to decode the stream into a series of
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|
|
378 characters (which may be from multiple charsets) when the text is read
|
|
|
379 from a file or process, and is used to encode the text back into the
|
|
|
380 same format when it is written out to a file or process.
|
|
|
381
|
|
|
382 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
383 Text, which is used for inter-client data under the X Window System)
|
|
|
384 use escape sequences to switch between different charsets -- Japanese
|
|
185
|
385 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
386 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
70
|
387 `make-coding-system' for more information.
|
|
|
388
|
|
|
389 Coding systems are normally identified using a symbol, and the
|
|
|
390 symbol is accepted in place of the actual coding system object whenever
|
|
|
391 a coding system is called for. (This is similar to how faces work.)
|
|
|
392 */
|
|
|
393 (object))
|
|
|
394 {
|
|
|
395 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
396 }
|
|
|
397
|
|
|
398 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
399 Retrieve the coding system of the given name.
|
|
|
400
|
|
|
401 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
402 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
403 If there is no such coding system, nil is returned. Otherwise the
|
|
|
404 associated coding system object is returned.
|
|
|
405 */
|
|
|
406 (coding_system_or_name))
|
|
|
407 {
|
|
|
408 if (NILP (coding_system_or_name))
|
|
|
409 coding_system_or_name = Qbinary;
|
|
|
410 if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
411 return coding_system_or_name;
|
|
|
412 CHECK_SYMBOL (coding_system_or_name);
|
|
|
413
|
|
|
414 return Fgethash (coding_system_or_name, Vcoding_system_hashtable, Qnil);
|
|
|
415 }
|
|
|
416
|
|
|
417 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
418 Retrieve the coding system of the given name.
|
|
|
419 Same as `find-coding-system' except that if there is no such
|
|
|
420 coding system, an error is signaled instead of returning nil.
|
|
|
421 */
|
|
|
422 (name))
|
|
|
423 {
|
|
|
424 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
425
|
|
|
426 if (NILP (coding_system))
|
|
|
427 signal_simple_error ("No such coding system", name);
|
|
|
428 return coding_system;
|
|
|
429 }
|
|
|
430
|
|
|
431 /* We store the coding systems in hash tables with the names as the key and the
|
|
|
432 actual coding system object as the value. Occasionally we need to use them
|
|
|
433 in a list format. These routines provide us with that. */
|
|
|
434 struct coding_system_list_closure
|
|
|
435 {
|
|
|
436 Lisp_Object *coding_system_list;
|
|
|
437 };
|
|
|
438
|
|
241
|
439 static int
|
|
70
|
440 add_coding_system_to_list_mapper (CONST void *hash_key, void *hash_contents,
|
|
|
441 void *coding_system_list_closure)
|
|
|
442 {
|
|
|
443 /* This function can GC */
|
|
|
444 Lisp_Object key, contents;
|
|
|
445 Lisp_Object *coding_system_list;
|
|
185
|
446 struct coding_system_list_closure *cscl =
|
|
|
447 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
70
|
448 CVOID_TO_LISP (key, hash_key);
|
|
|
449 VOID_TO_LISP (contents, hash_contents);
|
|
185
|
450 coding_system_list = cscl->coding_system_list;
|
|
70
|
451
|
|
|
452 *coding_system_list = Fcons (XCODING_SYSTEM (contents)->name,
|
|
|
453 *coding_system_list);
|
|
241
|
454 return 0;
|
|
70
|
455 }
|
|
|
456
|
|
|
457 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
|
458 Return a list of the names of all defined coding systems.
|
|
|
459 */
|
|
|
460 ())
|
|
|
461 {
|
|
|
462 Lisp_Object coding_system_list = Qnil;
|
|
|
463 struct gcpro gcpro1;
|
|
|
464 struct coding_system_list_closure coding_system_list_closure;
|
|
|
465
|
|
|
466 GCPRO1 (coding_system_list);
|
|
|
467 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
|
468 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hashtable,
|
|
|
469 &coding_system_list_closure);
|
|
|
470 UNGCPRO;
|
|
|
471
|
|
|
472 return coding_system_list;
|
|
|
473 }
|
|
|
474
|
|
|
475 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
476 Return the name of the given coding system.
|
|
|
477 */
|
|
|
478 (coding_system))
|
|
|
479 {
|
|
|
480 coding_system = Fget_coding_system (coding_system);
|
|
173
|
481 return XCODING_SYSTEM_NAME (coding_system);
|
|
70
|
482 }
|
|
|
483
|
|
|
484 static struct Lisp_Coding_System *
|
|
179
|
485 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
|
|
70
|
486 {
|
|
185
|
487 struct Lisp_Coding_System *codesys =
|
|
|
488 alloc_lcrecord_type (struct Lisp_Coding_System, lrecord_coding_system);
|
|
70
|
489
|
|
|
490 zero_lcrecord (codesys);
|
|
|
491 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
492 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
|
493 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
|
494 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
495 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
496 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
|
497 CODING_SYSTEM_TYPE (codesys) = type;
|
|
|
498
|
|
|
499 if (type == CODESYS_ISO2022)
|
|
|
500 {
|
|
|
501 int i;
|
|
|
502 for (i = 0; i < 4; i++)
|
|
|
503 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
|
504 }
|
|
|
505 else if (type == CODESYS_CCL)
|
|
|
506 {
|
|
|
507 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
|
508 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
|
509 }
|
|
|
510
|
|
|
511 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
512
|
|
|
513 return codesys;
|
|
|
514 }
|
|
|
515
|
|
|
516 /* Given a list of charset conversion specs as specified in a Lisp
|
|
|
517 program, parse it into STORE_HERE. */
|
|
|
518
|
|
|
519 static void
|
|
|
520 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
|
521 Lisp_Object spec_list)
|
|
|
522 {
|
|
|
523 Lisp_Object rest;
|
|
|
524
|
|
|
525 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
|
526 {
|
|
|
527 Lisp_Object car = XCAR (rest);
|
|
|
528 Lisp_Object from, to;
|
|
|
529 struct charset_conversion_spec spec;
|
|
|
530
|
|
|
531 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
|
532 signal_simple_error ("Invalid charset conversion spec", car);
|
|
|
533 from = Fget_charset (XCAR (car));
|
|
|
534 to = Fget_charset (XCAR (XCDR (car)));
|
|
|
535 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
|
536 signal_simple_error_2
|
|
|
537 ("Attempted conversion between different charset types",
|
|
|
538 from, to);
|
|
|
539 spec.from_charset = from;
|
|
|
540 spec.to_charset = to;
|
|
|
541
|
|
|
542 Dynarr_add (store_here, spec);
|
|
|
543 }
|
|
|
544 }
|
|
|
545
|
|
|
546 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
|
547 specs, return the equivalent as the Lisp programmer would see it.
|
|
|
548
|
|
|
549 If LOAD_HERE is 0, return Qnil. */
|
|
|
550
|
|
|
551 static Lisp_Object
|
|
|
552 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
|
553 {
|
|
|
554 int i;
|
|
|
555 Lisp_Object result = Qnil;
|
|
|
556
|
|
|
557 if (!load_here)
|
|
183
|
558 return Qnil;
|
|
70
|
559 for (i = 0; i < Dynarr_length (load_here); i++)
|
|
|
560 {
|
|
|
561 struct charset_conversion_spec *ccs =
|
|
|
562 Dynarr_atp (load_here, i);
|
|
|
563 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
|
564 }
|
|
|
565
|
|
|
566 return Fnreverse (result);
|
|
|
567 }
|
|
|
568
|
|
|
569 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
570 Register symbol NAME as a coding system.
|
|
|
571
|
|
|
572 TYPE describes the conversion method used and should be one of
|
|
|
573
|
|
207
|
574 nil or 'undecided
|
|
70
|
575 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
576 used in the file.
|
|
|
577 'no-conversion
|
|
|
578 No conversion. Use this for binary files and such. On output,
|
|
|
579 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
580 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
581 characters will only be present if you explicitly insert them.)
|
|
|
582 'shift-jis
|
|
|
583 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
|
584 'iso2022
|
|
|
585 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
586 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
587 standard Unix encoding for Japanese and other languages), and
|
|
|
588 Compound Text (the encoding used in X11). You can specify more
|
|
|
589 specific information about the conversion with the FLAGS argument.
|
|
|
590 'big5
|
|
|
591 Big5 (the encoding commonly used for Taiwanese).
|
|
|
592 'ccl
|
|
|
593 The conversion is performed using a user-written pseudo-code
|
|
|
594 program. CCL (Code Conversion Language) is the name of this
|
|
|
595 pseudo-code.
|
|
|
596 'internal
|
|
|
597 Write out or read in the raw contents of the memory representing
|
|
|
598 the buffer's text. This is primarily useful for debugging
|
|
|
599 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
600 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
601 WARNING: Reading in a file using 'internal conversion can result
|
|
|
602 in an internal inconsistency in the memory representing a
|
|
|
603 buffer's text, which will produce unpredictable results and may
|
|
|
604 cause XEmacs to crash. Under normal circumstances you should
|
|
|
605 never use 'internal conversion.
|
|
|
606
|
|
|
607 DOC-STRING is a string describing the coding system.
|
|
|
608
|
|
|
609 PROPS is a property list, describing the specific nature of the
|
|
|
610 character set. Recognized properties are:
|
|
|
611
|
|
|
612 'mnemonic
|
|
|
613 String to be displayed in the modeline when this coding system is
|
|
|
614 active.
|
|
|
615
|
|
|
616 'eol-type
|
|
|
617 End-of-line conversion to be used. It should be one of
|
|
|
618
|
|
|
619 nil
|
|
|
620 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
621 or CR). Also generate subsidiary coding systems named
|
|
|
622 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
623 identical to this coding system but have an EOL-TYPE
|
|
|
624 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
625 'lf
|
|
|
626 The end of a line is marked externally using ASCII LF.
|
|
|
627 Since this is also the way that XEmacs represents an
|
|
|
628 end-of-line internally, specifying this option results
|
|
|
629 in no end-of-line conversion. This is the standard
|
|
|
630 format for Unix text files.
|
|
|
631 'crlf
|
|
|
632 The end of a line is marked externally using ASCII
|
|
|
633 CRLF. This is the standard format for MS-DOS text
|
|
|
634 files.
|
|
|
635 'cr
|
|
|
636 The end of a line is marked externally using ASCII CR.
|
|
|
637 This is the standard format for Macintosh text files.
|
|
|
638 t
|
|
|
639 Automatically detect the end-of-line type but do not
|
|
|
640 generate subsidiary coding systems. (This value is
|
|
|
641 converted to nil when stored internally, and
|
|
|
642 `coding-system-property' will return nil.)
|
|
|
643
|
|
|
644 'post-read-conversion
|
|
|
645 Function called after a file has been read in, to perform the
|
|
|
646 decoding. Called with two arguments, BEG and END, denoting
|
|
|
647 a region of the current buffer to be decoded.
|
|
|
648
|
|
|
649 'pre-write-conversion
|
|
|
650 Function called before a file is written out, to perform the
|
|
|
651 encoding. Called with two arguments, BEG and END, denoting
|
|
|
652 a region of the current buffer to be encoded.
|
|
|
653
|
|
|
654
|
|
|
655 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
656
|
|
|
657 'charset-g0
|
|
|
658 'charset-g1
|
|
|
659 'charset-g2
|
|
|
660 'charset-g3
|
|
|
661 The character set initially designated to the G0 - G3 registers.
|
|
|
662 The value should be one of
|
|
|
663
|
|
|
664 -- A charset object (designate that character set)
|
|
|
665 -- nil (do not ever use this register)
|
|
|
666 -- t (no character set is initially designated to
|
|
|
667 the register, but may be later on; this automatically
|
|
|
668 sets the corresponding `force-g*-on-output' property)
|
|
|
669
|
|
|
670 'force-g0-on-output
|
|
|
671 'force-g1-on-output
|
|
|
672 'force-g2-on-output
|
|
|
673 'force-g2-on-output
|
|
|
674 If non-nil, send an explicit designation sequence on output before
|
|
|
675 using the specified register.
|
|
|
676
|
|
|
677 'short
|
|
185
|
678 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
679 "ESC $ B" on output in place of the full designation sequences
|
|
|
680 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
70
|
681
|
|
|
682 'no-ascii-eol
|
|
|
683 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
684 Setting this to non-nil also suppresses other state-resetting that
|
|
|
685 normally happens at the end of a line.
|
|
|
686
|
|
|
687 'no-ascii-cntl
|
|
|
688 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
689
|
|
|
690 'seven
|
|
|
691 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
692 environment.
|
|
|
693
|
|
|
694 'lock-shift
|
|
|
695 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
696 or designation by escape sequence.
|
|
|
697
|
|
|
698 'no-iso6429
|
|
|
699 If non-nil, don't use ISO6429's direction specification.
|
|
|
700
|
|
|
701 'escape-quoted
|
|
|
702 If non-nil, literal control characters that are the same as
|
|
|
703 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
704 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
185
|
705 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
70
|
706 so that they can be properly distinguished from an escape sequence.
|
|
|
707 (Note that doing this results in a non-portable encoding.) This
|
|
|
708 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
709 is a good choice for a quoting character because there are no
|
|
|
710 escape sequences whose second byte is a character from the Control-0
|
|
|
711 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
712 ISO2022 standard.
|
|
|
713
|
|
|
714 'input-charset-conversion
|
|
|
715 A list of conversion specifications, specifying conversion of
|
|
|
716 characters in one charset to another when decoding is performed.
|
|
|
717 Each specification is a list of two elements: the source charset,
|
|
|
718 and the destination charset.
|
|
|
719
|
|
|
720 'output-charset-conversion
|
|
|
721 A list of conversion specifications, specifying conversion of
|
|
|
722 characters in one charset to another when encoding is performed.
|
|
|
723 The form of each specification is the same as for
|
|
|
724 'input-charset-conversion.
|
|
|
725
|
|
|
726
|
|
|
727 The following additional properties are recognized (and required)
|
|
|
728 if TYPE is 'ccl:
|
|
|
729
|
|
|
730 'decode
|
|
|
731 CCL program used for decoding (converting to internal format).
|
|
|
732
|
|
|
733 'encode
|
|
|
734 CCL program used for encoding (converting to external format).
|
|
|
735 */
|
|
|
736 (name, type, doc_string, props))
|
|
|
737 {
|
|
|
738 struct Lisp_Coding_System *codesys;
|
|
|
739 Lisp_Object rest, key, value;
|
|
185
|
740 enum coding_system_type ty;
|
|
70
|
741 int need_to_setup_eol_systems = 1;
|
|
|
742
|
|
183
|
743 /* Convert type to constant */
|
|
207
|
744 if (NILP (type) || EQ (type, Qundecided))
|
|
120
|
745 { ty = CODESYS_AUTODETECT; }
|
|
|
746 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
|
747 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
|
748 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
|
|
749 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
|
750 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
70
|
751 #ifdef DEBUG_XEMACS
|
|
120
|
752 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
70
|
753 #endif
|
|
|
754 else
|
|
|
755 signal_simple_error ("Invalid coding system type", type);
|
|
|
756
|
|
|
757 CHECK_SYMBOL (name);
|
|
|
758
|
|
|
759 codesys = allocate_coding_system (ty, name);
|
|
|
760
|
|
|
761 if (NILP (doc_string))
|
|
|
762 doc_string = build_string ("");
|
|
|
763 else
|
|
|
764 CHECK_STRING (doc_string);
|
|
|
765 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
|
766
|
|
|
767 EXTERNAL_PROPERTY_LIST_LOOP (rest, key, value, props)
|
|
|
768 {
|
|
|
769 if (EQ (key, Qmnemonic))
|
|
|
770 {
|
|
|
771 if (!NILP (value))
|
|
|
772 CHECK_STRING (value);
|
|
|
773 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
|
774 }
|
|
|
775
|
|
|
776 else if (EQ (key, Qeol_type))
|
|
|
777 {
|
|
|
778 need_to_setup_eol_systems = NILP (value);
|
|
|
779 if (EQ (value, Qt))
|
|
|
780 value = Qnil;
|
|
|
781 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
|
782 }
|
|
|
783
|
|
|
784 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
|
785 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
|
786 else if (ty == CODESYS_ISO2022)
|
|
|
787 {
|
|
|
788 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
|
789 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
|
790 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
|
791
|
|
|
792 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
|
793 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
|
794 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
|
795 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
183
|
796
|
|
70
|
797 #define FROB_FORCE_CHARSET(charset_num) \
|
|
|
798 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
|
799
|
|
|
800 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
|
801 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
|
802 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
|
803 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
|
804
|
|
|
805 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
|
806 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
183
|
807
|
|
70
|
808 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
|
809 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
|
810 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
|
811 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
|
812 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
|
813 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
|
814 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
183
|
815
|
|
70
|
816 else if (EQ (key, Qinput_charset_conversion))
|
|
|
817 {
|
|
|
818 codesys->iso2022.input_conv =
|
|
185
|
819 Dynarr_new (charset_conversion_spec);
|
|
70
|
820 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
|
821 value);
|
|
|
822 }
|
|
|
823 else if (EQ (key, Qoutput_charset_conversion))
|
|
|
824 {
|
|
|
825 codesys->iso2022.output_conv =
|
|
185
|
826 Dynarr_new (charset_conversion_spec);
|
|
70
|
827 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
|
828 value);
|
|
|
829 }
|
|
|
830 else
|
|
|
831 signal_simple_error ("Unrecognized property", key);
|
|
|
832 }
|
|
|
833 else if (EQ (type, Qccl))
|
|
|
834 {
|
|
|
835 if (EQ (key, Qdecode))
|
|
|
836 {
|
|
|
837 CHECK_VECTOR (value);
|
|
|
838 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
|
839 }
|
|
|
840 else if (EQ (key, Qencode))
|
|
|
841 {
|
|
|
842 CHECK_VECTOR (value);
|
|
|
843 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
|
844 }
|
|
|
845 else
|
|
|
846 signal_simple_error ("Unrecognized property", key);
|
|
|
847 }
|
|
|
848 else
|
|
|
849 signal_simple_error ("Unrecognized property", key);
|
|
|
850 }
|
|
|
851
|
|
|
852 if (need_to_setup_eol_systems)
|
|
|
853 setup_eol_coding_systems (codesys);
|
|
183
|
854
|
|
70
|
855 {
|
|
|
856 Lisp_Object codesys_obj;
|
|
|
857 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
858 Fputhash (name, codesys_obj, Vcoding_system_hashtable);
|
|
|
859 return codesys_obj;
|
|
|
860 }
|
|
|
861 }
|
|
|
862
|
|
|
863 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
864 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
865 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
866 be created.
|
|
|
867 */
|
|
|
868 (old_coding_system, new_name))
|
|
|
869 {
|
|
|
870 Lisp_Object new_coding_system;
|
|
|
871 old_coding_system = Fget_coding_system (old_coding_system);
|
|
|
872 new_coding_system = Ffind_coding_system (new_name);
|
|
|
873 if (NILP (new_coding_system))
|
|
|
874 {
|
|
|
875 XSETCODING_SYSTEM (new_coding_system,
|
|
|
876 allocate_coding_system
|
|
|
877 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
|
878 new_name));
|
|
|
879 Fputhash (new_name, new_coding_system, Vcoding_system_hashtable);
|
|
|
880 }
|
|
|
881
|
|
|
882 {
|
|
|
883 struct Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
884 struct Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
|
885 memcpy (((char *) to ) + sizeof (to->header),
|
|
|
886 ((char *) from) + sizeof (from->header),
|
|
|
887 sizeof (*from) - sizeof (from->header));
|
|
|
888 to->name = new_name;
|
|
|
889 }
|
|
|
890 return new_coding_system;
|
|
|
891 }
|
|
|
892
|
|
|
893 static Lisp_Object
|
|
179
|
894 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
|
70
|
895 {
|
|
|
896 struct Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
897 Lisp_Object new_coding_system;
|
|
|
898
|
|
|
899 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
900 return coding_system;
|
|
179
|
901
|
|
|
902 switch (type)
|
|
70
|
903 {
|
|
179
|
904 case EOL_AUTODETECT: return coding_system;
|
|
70
|
905 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
906 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
907 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
|
908 default: abort ();
|
|
|
909 }
|
|
|
910
|
|
|
911 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
912 }
|
|
|
913
|
|
|
914 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
915 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
|
916 */
|
|
|
917 (coding_system, eol_type))
|
|
|
918 {
|
|
|
919 coding_system = Fget_coding_system (coding_system);
|
|
|
920
|
|
|
921 return subsidiary_coding_system (coding_system,
|
|
|
922 symbol_to_eol_type (eol_type));
|
|
|
923 }
|
|
|
924
|
|
|
925
|
|
|
926 /************************************************************************/
|
|
|
927 /* Coding system accessors */
|
|
|
928 /************************************************************************/
|
|
|
929
|
|
|
930 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
|
931 Return the doc string for CODING-SYSTEM.
|
|
|
932 */
|
|
|
933 (coding_system))
|
|
|
934 {
|
|
|
935 coding_system = Fget_coding_system (coding_system);
|
|
|
936 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
937 }
|
|
|
938
|
|
|
939 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
940 Return the type of CODING-SYSTEM.
|
|
|
941 */
|
|
|
942 (coding_system))
|
|
|
943 {
|
|
|
944 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
|
945 {
|
|
207
|
946 case CODESYS_AUTODETECT: return Qundecided;
|
|
70
|
947 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
|
948 case CODESYS_ISO2022: return Qiso2022;
|
|
|
949 case CODESYS_BIG5: return Qbig5;
|
|
|
950 case CODESYS_CCL: return Qccl;
|
|
|
951 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
|
952 #ifdef DEBUG_XEMACS
|
|
|
953 case CODESYS_INTERNAL: return Qinternal;
|
|
|
954 #endif
|
|
|
955 default:
|
|
|
956 abort ();
|
|
|
957 }
|
|
|
958
|
|
|
959 return Qnil; /* not reached */
|
|
|
960 }
|
|
|
961
|
|
243
|
962 static
|
|
209
|
963 Lisp_Object coding_system_charset (Lisp_Object coding_system, int gnum)
|
|
207
|
964 {
|
|
|
965 Lisp_Object cs
|
|
|
966 = XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, gnum);
|
|
272
|
967
|
|
|
968 return CHARSETP (cs) ? XCHARSET_NAME (cs) : Qnil;
|
|
207
|
969 }
|
|
|
970
|
|
|
971 DEFUN ("coding-system-charset", Fcoding_system_charset, 2, 2, 0, /*
|
|
|
972 Return initial charset of CODING-SYSTEM designated to GNUM.
|
|
|
973 GNUM allows 0 .. 3.
|
|
|
974 */
|
|
|
975 (coding_system, gnum))
|
|
|
976 {
|
|
|
977 coding_system = Fget_coding_system (coding_system);
|
|
|
978 CHECK_INT (gnum);
|
|
|
979
|
|
272
|
980 return coding_system_charset (coding_system, XINT (gnum));
|
|
207
|
981 }
|
|
|
982
|
|
70
|
983 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
984 Return the PROP property of CODING-SYSTEM.
|
|
|
985 */
|
|
|
986 (coding_system, prop))
|
|
|
987 {
|
|
|
988 int i, ok = 0;
|
|
|
989 enum coding_system_type type;
|
|
|
990
|
|
|
991 coding_system = Fget_coding_system (coding_system);
|
|
|
992 CHECK_SYMBOL (prop);
|
|
|
993 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
|
994
|
|
|
995 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
|
996 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
|
997 {
|
|
|
998 ok = 1;
|
|
|
999 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
|
1000 {
|
|
|
1001 case CODESYS_PROP_ALL_OK:
|
|
|
1002 break;
|
|
|
1003
|
|
|
1004 case CODESYS_PROP_ISO2022:
|
|
|
1005 if (type != CODESYS_ISO2022)
|
|
|
1006 signal_simple_error
|
|
|
1007 ("Property only valid in ISO2022 coding systems",
|
|
|
1008 prop);
|
|
|
1009 break;
|
|
|
1010
|
|
|
1011 case CODESYS_PROP_CCL:
|
|
|
1012 if (type != CODESYS_CCL)
|
|
|
1013 signal_simple_error
|
|
|
1014 ("Property only valid in CCL coding systems",
|
|
|
1015 prop);
|
|
|
1016 break;
|
|
|
1017
|
|
|
1018 default:
|
|
|
1019 abort ();
|
|
|
1020 }
|
|
|
1021 }
|
|
|
1022
|
|
|
1023 if (!ok)
|
|
|
1024 signal_simple_error ("Unrecognized property", prop);
|
|
|
1025
|
|
|
1026 if (EQ (prop, Qname))
|
|
|
1027 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1028 else if (EQ (prop, Qtype))
|
|
|
1029 return Fcoding_system_type (coding_system);
|
|
|
1030 else if (EQ (prop, Qdoc_string))
|
|
|
1031 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1032 else if (EQ (prop, Qmnemonic))
|
|
|
1033 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
|
1034 else if (EQ (prop, Qeol_type))
|
|
|
1035 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
|
1036 else if (EQ (prop, Qeol_lf))
|
|
|
1037 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1038 else if (EQ (prop, Qeol_crlf))
|
|
|
1039 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1040 else if (EQ (prop, Qeol_cr))
|
|
|
1041 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1042 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1043 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1044 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1045 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
|
1046 else if (type == CODESYS_ISO2022)
|
|
|
1047 {
|
|
207
|
1048 if (EQ (prop, Qcharset_g0))
|
|
|
1049 return coding_system_charset (coding_system, 0);
|
|
|
1050 else if (EQ (prop, Qcharset_g1))
|
|
|
1051 return coding_system_charset (coding_system, 1);
|
|
|
1052 else if (EQ (prop, Qcharset_g2))
|
|
|
1053 return coding_system_charset (coding_system, 2);
|
|
|
1054 else if (EQ (prop, Qcharset_g3))
|
|
|
1055 return coding_system_charset (coding_system, 3);
|
|
70
|
1056
|
|
|
1057 #define FORCE_CHARSET(charset_num) \
|
|
|
1058 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
|
1059 (coding_system, charset_num) ? Qt : Qnil)
|
|
|
1060
|
|
|
1061 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
|
1062 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
|
1063 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
|
1064 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
|
1065
|
|
|
1066 #define LISP_BOOLEAN(prop) \
|
|
|
1067 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
183
|
1068
|
|
70
|
1069 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
|
1070 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
|
1071 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
|
1072 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
|
1073 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
|
1074 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
|
1075 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
183
|
1076
|
|
70
|
1077 else if (EQ (prop, Qinput_charset_conversion))
|
|
|
1078 return
|
|
|
1079 unparse_charset_conversion_specs
|
|
|
1080 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
|
1081 else if (EQ (prop, Qoutput_charset_conversion))
|
|
|
1082 return
|
|
|
1083 unparse_charset_conversion_specs
|
|
|
1084 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
|
1085 else
|
|
|
1086 abort ();
|
|
|
1087 }
|
|
|
1088 else if (type == CODESYS_CCL)
|
|
|
1089 {
|
|
|
1090 if (EQ (prop, Qdecode))
|
|
|
1091 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
|
1092 else if (EQ (prop, Qencode))
|
|
|
1093 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
|
1094 else
|
|
|
1095 abort ();
|
|
|
1096 }
|
|
|
1097 else
|
|
|
1098 abort ();
|
|
|
1099
|
|
|
1100 return Qnil; /* not reached */
|
|
|
1101 }
|
|
|
1102
|
|
|
1103
|
|
|
1104 /************************************************************************/
|
|
|
1105 /* Coding category functions */
|
|
|
1106 /************************************************************************/
|
|
|
1107
|
|
|
1108 static int
|
|
|
1109 decode_coding_category (Lisp_Object symbol)
|
|
|
1110 {
|
|
|
1111 int i;
|
|
|
1112
|
|
|
1113 CHECK_SYMBOL (symbol);
|
|
|
1114 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1115 if (EQ (coding_category_symbol[i], symbol))
|
|
|
1116 return i;
|
|
|
1117
|
|
|
1118 signal_simple_error ("Unrecognized coding category", symbol);
|
|
|
1119 return 0; /* not reached */
|
|
|
1120 }
|
|
|
1121
|
|
|
1122 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
1123 Return a list of all recognized coding categories.
|
|
|
1124 */
|
|
|
1125 ())
|
|
|
1126 {
|
|
|
1127 int i;
|
|
|
1128 Lisp_Object list = Qnil;
|
|
|
1129
|
|
|
1130 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1131 list = Fcons (coding_category_symbol[i], list);
|
|
|
1132 return list;
|
|
|
1133 }
|
|
|
1134
|
|
|
1135 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
1136 Change the priority order of the coding categories.
|
|
|
1137 LIST should be list of coding categories, in descending order of
|
|
|
1138 priority. Unspecified coding categories will be lower in priority
|
|
|
1139 than all specified ones, in the same relative order they were in
|
|
|
1140 previously.
|
|
|
1141 */
|
|
|
1142 (list))
|
|
|
1143 {
|
|
|
1144 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
|
1145 int i, j;
|
|
|
1146 Lisp_Object rest;
|
|
|
1147
|
|
|
1148 /* First generate a list that maps coding categories to priorities. */
|
|
|
1149
|
|
|
1150 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1151 category_to_priority[i] = -1;
|
|
|
1152
|
|
|
1153 /* Highest priority comes from the specified list. */
|
|
|
1154 i = 0;
|
|
|
1155 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
1156 {
|
|
|
1157 int cat = decode_coding_category (XCAR (rest));
|
|
|
1158
|
|
|
1159 if (category_to_priority[cat] >= 0)
|
|
|
1160 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
|
1161 category_to_priority[cat] = i++;
|
|
|
1162 }
|
|
|
1163
|
|
|
1164 /* Now go through the existing categories by priority to retrieve
|
|
|
1165 the categories not yet specified and preserve their priority
|
|
|
1166 order. */
|
|
|
1167 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
|
1168 {
|
|
|
1169 int cat = coding_category_by_priority[j];
|
|
|
1170 if (category_to_priority[cat] < 0)
|
|
|
1171 category_to_priority[cat] = i++;
|
|
|
1172 }
|
|
|
1173
|
|
|
1174 /* Now we need to construct the inverse of the mapping we just
|
|
|
1175 constructed. */
|
|
|
1176
|
|
|
1177 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1178 coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
1179
|
|
|
1180 /* Phew! That was confusing. */
|
|
|
1181 return Qnil;
|
|
|
1182 }
|
|
|
1183
|
|
|
1184 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
1185 Return a list of coding categories in descending order of priority.
|
|
|
1186 */
|
|
|
1187 ())
|
|
|
1188 {
|
|
|
1189 int i;
|
|
|
1190 Lisp_Object list = Qnil;
|
|
|
1191
|
|
|
1192 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1193 list = Fcons (coding_category_symbol[coding_category_by_priority[i]],
|
|
|
1194 list);
|
|
|
1195 return list;
|
|
|
1196 }
|
|
|
1197
|
|
|
1198 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
1199 Change the coding system associated with a coding category.
|
|
|
1200 */
|
|
|
1201 (coding_category, coding_system))
|
|
|
1202 {
|
|
|
1203 int cat = decode_coding_category (coding_category);
|
|
|
1204
|
|
|
1205 coding_system = Fget_coding_system (coding_system);
|
|
|
1206 coding_category_system[cat] = coding_system;
|
|
|
1207 return Qnil;
|
|
|
1208 }
|
|
|
1209
|
|
|
1210 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
1211 Return the coding system associated with a coding category.
|
|
|
1212 */
|
|
|
1213 (coding_category))
|
|
|
1214 {
|
|
|
1215 int cat = decode_coding_category (coding_category);
|
|
|
1216 Lisp_Object sys = coding_category_system[cat];
|
|
|
1217
|
|
|
1218 if (!NILP (sys))
|
|
|
1219 return XCODING_SYSTEM_NAME (sys);
|
|
|
1220 return Qnil;
|
|
|
1221 }
|
|
|
1222
|
|
|
1223
|
|
|
1224 /************************************************************************/
|
|
|
1225 /* Detecting the encoding of data */
|
|
|
1226 /************************************************************************/
|
|
|
1227
|
|
|
1228 struct detection_state
|
|
|
1229 {
|
|
179
|
1230 enum eol_type eol_type;
|
|
70
|
1231 int seen_non_ascii;
|
|
|
1232 int mask;
|
|
183
|
1233
|
|
70
|
1234 struct
|
|
272
|
1235 {
|
|
|
1236 int mask;
|
|
|
1237 int in_second_byte;
|
|
|
1238 }
|
|
70
|
1239 big5;
|
|
183
|
1240
|
|
70
|
1241 struct
|
|
272
|
1242 {
|
|
|
1243 int mask;
|
|
|
1244 int in_second_byte;
|
|
|
1245 }
|
|
70
|
1246 shift_jis;
|
|
183
|
1247
|
|
70
|
1248 struct
|
|
272
|
1249 {
|
|
|
1250 int mask;
|
|
|
1251 int initted;
|
|
|
1252 struct iso2022_decoder iso;
|
|
|
1253 unsigned int flags;
|
|
|
1254 int high_byte_count;
|
|
|
1255 unsigned int saw_single_shift:1;
|
|
|
1256 }
|
|
70
|
1257 iso2022;
|
|
74
|
1258
|
|
70
|
1259 struct
|
|
272
|
1260 {
|
|
|
1261 int seen_anything;
|
|
|
1262 int just_saw_cr;
|
|
|
1263 }
|
|
70
|
1264 eol;
|
|
|
1265 };
|
|
|
1266
|
|
|
1267 static int
|
|
|
1268 acceptable_control_char_p (int c)
|
|
|
1269 {
|
|
|
1270 switch (c)
|
|
|
1271 {
|
|
|
1272 /* Allow and ignore control characters that you might
|
|
|
1273 reasonably see in a text file */
|
|
|
1274 case '\r':
|
|
|
1275 case '\n':
|
|
|
1276 case '\t':
|
|
|
1277 case 7: /* bell */
|
|
|
1278 case 8: /* backspace */
|
|
|
1279 case 11: /* vertical tab */
|
|
|
1280 case 12: /* form feed */
|
|
|
1281 case 26: /* MS-DOS C-z junk */
|
|
207
|
1282 case 31: /* '^_' -- for info */
|
|
70
|
1283 return 1;
|
|
|
1284 default:
|
|
|
1285 return 0;
|
|
|
1286 }
|
|
|
1287 }
|
|
|
1288
|
|
|
1289 static int
|
|
|
1290 mask_has_at_most_one_bit_p (int mask)
|
|
|
1291 {
|
|
|
1292 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
|
1293 technical interviews */
|
|
|
1294 return (mask & (mask - 1)) == 0;
|
|
|
1295 }
|
|
|
1296
|
|
179
|
1297 static enum eol_type
|
|
70
|
1298 detect_eol_type (struct detection_state *st, CONST unsigned char *src,
|
|
|
1299 unsigned int n)
|
|
|
1300 {
|
|
|
1301 int c;
|
|
|
1302
|
|
|
1303 while (n--)
|
|
|
1304 {
|
|
|
1305 c = *src++;
|
|
|
1306 if (c == '\r')
|
|
|
1307 st->eol.just_saw_cr = 1;
|
|
|
1308 else
|
|
|
1309 {
|
|
|
1310 if (c == '\n')
|
|
|
1311 {
|
|
|
1312 if (st->eol.just_saw_cr)
|
|
|
1313 return EOL_CRLF;
|
|
|
1314 else if (st->eol.seen_anything)
|
|
|
1315 return EOL_LF;
|
|
|
1316 }
|
|
|
1317 else if (st->eol.just_saw_cr)
|
|
|
1318 return EOL_CR;
|
|
|
1319 st->eol.just_saw_cr = 0;
|
|
|
1320 }
|
|
|
1321 st->eol.seen_anything = 1;
|
|
|
1322 }
|
|
|
1323
|
|
|
1324 return EOL_AUTODETECT;
|
|
|
1325 }
|
|
|
1326
|
|
|
1327 /* Attempt to determine the encoding and EOL type of the given text.
|
|
|
1328 Before calling this function for the first type, you must initialize
|
|
|
1329 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
|
1330
|
|
|
1331 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
|
1332 not yet known.
|
|
|
1333
|
|
|
1334 st->mask holds the determined coding category mask, or ~0 if only
|
|
|
1335 ASCII has been seen so far.
|
|
183
|
1336
|
|
70
|
1337 Returns:
|
|
|
1338
|
|
|
1339 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
|
1340 is present in st->mask
|
|
|
1341 1 == definitive answers are here for both st->eol_type and st->mask
|
|
|
1342 */
|
|
|
1343
|
|
|
1344 static int
|
|
|
1345 detect_coding_type (struct detection_state *st, CONST unsigned char *src,
|
|
|
1346 unsigned int n, int just_do_eol)
|
|
|
1347 {
|
|
|
1348 int c;
|
|
|
1349
|
|
|
1350 if (st->eol_type == EOL_AUTODETECT)
|
|
|
1351 st->eol_type = detect_eol_type (st, src, n);
|
|
|
1352
|
|
|
1353 if (just_do_eol)
|
|
|
1354 return st->eol_type != EOL_AUTODETECT;
|
|
183
|
1355
|
|
70
|
1356 if (!st->seen_non_ascii)
|
|
|
1357 {
|
|
|
1358 for (; n; n--, src++)
|
|
|
1359 {
|
|
|
1360 c = *src;
|
|
|
1361 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
1362 {
|
|
|
1363 st->seen_non_ascii = 1;
|
|
|
1364 st->shift_jis.mask = ~0;
|
|
|
1365 st->big5.mask = ~0;
|
|
|
1366 st->iso2022.mask = ~0;
|
|
|
1367 break;
|
|
|
1368 }
|
|
|
1369 }
|
|
|
1370 }
|
|
|
1371
|
|
|
1372 if (!n)
|
|
|
1373 return 0;
|
|
|
1374
|
|
|
1375 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
|
1376 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
|
1377 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
74
|
1378 st->shift_jis.mask = detect_coding_sjis (st, src, n);
|
|
70
|
1379 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
|
1380 st->big5.mask = detect_coding_big5 (st, src, n);
|
|
|
1381
|
|
|
1382 st->mask = st->iso2022.mask | st->shift_jis.mask | st->big5.mask;
|
|
|
1383
|
|
|
1384 {
|
|
|
1385 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
|
1386 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
|
1387 return retval && st->eol_type != EOL_AUTODETECT;
|
|
|
1388 }
|
|
|
1389 }
|
|
|
1390
|
|
|
1391 static Lisp_Object
|
|
|
1392 coding_system_from_mask (int mask)
|
|
|
1393 {
|
|
|
1394 if (mask == ~0)
|
|
|
1395 {
|
|
|
1396 /* If the file was entirely or basically ASCII, use the
|
|
110
|
1397 default value of `buffer-file-coding-system'. */
|
|
70
|
1398 Lisp_Object retval =
|
|
110
|
1399 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
70
|
1400 if (!NILP (retval))
|
|
|
1401 {
|
|
|
1402 retval = Ffind_coding_system (retval);
|
|
|
1403 if (NILP (retval))
|
|
|
1404 {
|
|
|
1405 warn_when_safe
|
|
|
1406 (Qbad_variable, Qwarning,
|
|
110
|
1407 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
1408 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
70
|
1409 }
|
|
|
1410 }
|
|
|
1411 if (NILP (retval))
|
|
|
1412 retval = Fget_coding_system (Qno_conversion);
|
|
|
1413 return retval;
|
|
|
1414 }
|
|
|
1415 else
|
|
|
1416 {
|
|
|
1417 int i;
|
|
|
1418 int cat = -1;
|
|
|
1419
|
|
|
1420 mask = postprocess_iso2022_mask (mask);
|
|
183
|
1421
|
|
70
|
1422 /* Look through the coding categories by priority and find
|
|
|
1423 the first one that is allowed. */
|
|
|
1424 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1425 {
|
|
|
1426 cat = coding_category_by_priority[i];
|
|
|
1427 if ((mask & (1 << cat)) &&
|
|
|
1428 !NILP (coding_category_system[cat]))
|
|
|
1429 break;
|
|
|
1430 }
|
|
|
1431 if (cat >= 0)
|
|
|
1432 return coding_category_system[cat];
|
|
|
1433 else
|
|
|
1434 return Fget_coding_system (Qno_conversion);
|
|
|
1435 }
|
|
|
1436 }
|
|
|
1437
|
|
|
1438 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
1439 as specified, do any autodetection that is called for. If the
|
|
|
1440 coding system and/or EOL type are not autodetect, they will be left
|
|
|
1441 alone; but this function will never return an autodetect coding system
|
|
|
1442 or EOL type.
|
|
|
1443
|
|
|
1444 This function does not automatically fetch subsidiary coding systems;
|
|
|
1445 that should be unnecessary with the explicit eol-type argument. */
|
|
|
1446
|
|
249
|
1447 void
|
|
70
|
1448 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
|
179
|
1449 enum eol_type *eol_type_in_out)
|
|
70
|
1450 {
|
|
|
1451 struct detection_state decst;
|
|
|
1452
|
|
|
1453 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1454 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
|
1455
|
|
272
|
1456 xzero (decst);
|
|
70
|
1457 decst.eol_type = *eol_type_in_out;
|
|
|
1458 decst.mask = ~0;
|
|
183
|
1459
|
|
70
|
1460 /* If autodetection is called for, do it now. */
|
|
|
1461 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT ||
|
|
|
1462 *eol_type_in_out == EOL_AUTODETECT)
|
|
|
1463 {
|
|
|
1464
|
|
|
1465 while (1)
|
|
|
1466 {
|
|
|
1467 unsigned char random_buffer[4096];
|
|
|
1468 int nread;
|
|
183
|
1469
|
|
70
|
1470 nread = Lstream_read (stream, random_buffer, sizeof (random_buffer));
|
|
|
1471 if (!nread)
|
|
|
1472 break;
|
|
|
1473 if (detect_coding_type (&decst, random_buffer, nread,
|
|
|
1474 XCODING_SYSTEM_TYPE (*codesys_in_out) !=
|
|
|
1475 CODESYS_AUTODETECT))
|
|
|
1476 break;
|
|
|
1477 }
|
|
|
1478
|
|
|
1479 *eol_type_in_out = decst.eol_type;
|
|
|
1480 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
|
|
1481 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
|
1482 }
|
|
|
1483
|
|
|
1484 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
|
1485 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1486 *eol_type_in_out = EOL_LF;
|
|
|
1487
|
|
|
1488 Lstream_rewind (stream);
|
|
|
1489 }
|
|
|
1490
|
|
|
1491 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
1492 Detect coding system of the text in the region between START and END.
|
|
207
|
1493 Returned a list of possible coding systems ordered by priority.
|
|
|
1494 If only ASCII characters are found, it returns 'undecided or one of
|
|
|
1495 its subsidiary coding systems according to a detected end-of-line
|
|
|
1496 type. Optional arg BUFFER defaults to the current buffer.
|
|
70
|
1497 */
|
|
|
1498 (start, end, buffer))
|
|
|
1499 {
|
|
|
1500 Lisp_Object val = Qnil;
|
|
|
1501 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1502 Bufpos b, e;
|
|
185
|
1503 Lisp_Object instream, lb_instream;
|
|
|
1504 Lstream *istr, *lb_istr;
|
|
70
|
1505 struct detection_state decst;
|
|
185
|
1506 struct gcpro gcpro1, gcpro2;
|
|
70
|
1507
|
|
|
1508 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
185
|
1509 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1510 lb_istr = XLSTREAM (lb_instream);
|
|
|
1511 instream = make_encoding_input_stream (lb_istr, Fget_coding_system (Qbinary));
|
|
|
1512 istr = XLSTREAM (instream);
|
|
|
1513 GCPRO2 (instream, lb_instream);
|
|
272
|
1514 xzero (decst);
|
|
70
|
1515 decst.eol_type = EOL_AUTODETECT;
|
|
|
1516 decst.mask = ~0;
|
|
|
1517 while (1)
|
|
|
1518 {
|
|
|
1519 unsigned char random_buffer[4096];
|
|
185
|
1520 int nread = Lstream_read (istr, random_buffer, sizeof (random_buffer));
|
|
|
1521
|
|
70
|
1522 if (!nread)
|
|
|
1523 break;
|
|
|
1524 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
|
1525 break;
|
|
|
1526 }
|
|
|
1527
|
|
|
1528 if (decst.mask == ~0)
|
|
207
|
1529 val = subsidiary_coding_system (Fget_coding_system (Qundecided),
|
|
179
|
1530 decst.eol_type);
|
|
70
|
1531 else
|
|
|
1532 {
|
|
|
1533 int i;
|
|
183
|
1534
|
|
70
|
1535 val = Qnil;
|
|
|
1536
|
|
|
1537 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
183
|
1538
|
|
70
|
1539 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1540 {
|
|
|
1541 int sys = coding_category_by_priority[i];
|
|
|
1542 if (decst.mask & (1 << sys))
|
|
|
1543 {
|
|
|
1544 Lisp_Object codesys = coding_category_system[sys];
|
|
|
1545 if (!NILP (codesys))
|
|
|
1546 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
|
1547 val = Fcons (codesys, val);
|
|
|
1548 }
|
|
|
1549 }
|
|
|
1550 }
|
|
185
|
1551 Lstream_close (istr);
|
|
|
1552 UNGCPRO;
|
|
|
1553 Lstream_delete (istr);
|
|
|
1554 Lstream_delete (lb_istr);
|
|
70
|
1555 return val;
|
|
|
1556 }
|
|
|
1557
|
|
|
1558
|
|
|
1559 /************************************************************************/
|
|
|
1560 /* Converting to internal Mule format ("decoding") */
|
|
|
1561 /************************************************************************/
|
|
|
1562
|
|
|
1563 /* A decoding stream is a stream used for decoding text (i.e.
|
|
|
1564 converting from some external format to internal format).
|
|
|
1565 The decoding-stream object keeps track of the actual coding
|
|
|
1566 stream, the stream that is at the other end, and data that
|
|
|
1567 needs to be persistent across the lifetime of the stream. */
|
|
|
1568
|
|
181
|
1569 /* Handle the EOL stuff related to just-read-in character C.
|
|
|
1570 EOL_TYPE is the EOL type of the coding stream.
|
|
|
1571 FLAGS is the current value of FLAGS in the coding stream, and may
|
|
|
1572 be modified by this macro. (The macro only looks at the
|
|
|
1573 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
|
|
|
1574 bytes are to be written. You need to also define a local goto
|
|
|
1575 label "label_continue_loop" that is at the end of the main
|
|
|
1576 character-reading loop.
|
|
70
|
1577
|
|
|
1578 If C is a CR character, then this macro handles it entirely and
|
|
|
1579 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
|
1580 anything to DST, and continues normally. You should continue
|
|
|
1581 processing C normally after this macro. */
|
|
|
1582
|
|
181
|
1583 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
|
|
70
|
1584 do { \
|
|
|
1585 if (c == '\r') \
|
|
|
1586 { \
|
|
181
|
1587 if (eol_type == EOL_CR) \
|
|
70
|
1588 Dynarr_add (dst, '\n'); \
|
|
181
|
1589 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
70
|
1590 Dynarr_add (dst, c); \
|
|
|
1591 else \
|
|
|
1592 flags |= CODING_STATE_CR; \
|
|
|
1593 goto label_continue_loop; \
|
|
|
1594 } \
|
|
|
1595 else if (flags & CODING_STATE_CR) \
|
|
181
|
1596 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
|
|
70
|
1597 if (c != '\n') \
|
|
|
1598 Dynarr_add (dst, '\r'); \
|
|
|
1599 flags &= ~CODING_STATE_CR; \
|
|
|
1600 } \
|
|
|
1601 } while (0)
|
|
|
1602
|
|
|
1603 /* C should be a binary character in the range 0 - 255; convert
|
|
|
1604 to internal format and add to Dynarr DST. */
|
|
|
1605
|
|
|
1606 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
|
1607 do { \
|
|
|
1608 if (BYTE_ASCII_P (c)) \
|
|
|
1609 Dynarr_add (dst, c); \
|
|
|
1610 else if (BYTE_C1_P (c)) \
|
|
|
1611 { \
|
|
|
1612 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
|
1613 Dynarr_add (dst, c + 0x20); \
|
|
|
1614 } \
|
|
|
1615 else \
|
|
|
1616 { \
|
|
74
|
1617 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
|
|
70
|
1618 Dynarr_add (dst, c); \
|
|
|
1619 } \
|
|
|
1620 } while (0)
|
|
|
1621
|
|
|
1622 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
|
1623 do { \
|
|
|
1624 if (ch) \
|
|
|
1625 { \
|
|
|
1626 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
|
1627 ch = 0; \
|
|
|
1628 } \
|
|
|
1629 } while (0)
|
|
|
1630
|
|
74
|
1631 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
|
|
|
1632 do { \
|
|
|
1633 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
|
1634 if ((flags & CODING_STATE_END) && \
|
|
|
1635 (flags & CODING_STATE_CR)) \
|
|
|
1636 Dynarr_add (dst, '\r'); \
|
|
70
|
1637 } while (0)
|
|
|
1638
|
|
|
1639 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
|
1640
|
|
|
1641 struct decoding_stream
|
|
|
1642 {
|
|
|
1643 /* Coding system that governs the conversion. */
|
|
|
1644 struct Lisp_Coding_System *codesys;
|
|
|
1645
|
|
|
1646 /* Stream that we read the encoded data from or
|
|
|
1647 write the decoded data to. */
|
|
|
1648 Lstream *other_end;
|
|
|
1649
|
|
|
1650 /* If we are reading, then we can return only a fixed amount of
|
|
|
1651 data, so if the conversion resulted in too much data, we store it
|
|
|
1652 here for retrieval the next time around. */
|
|
|
1653 unsigned_char_dynarr *runoff;
|
|
|
1654
|
|
|
1655 /* FLAGS holds flags indicating the current state of the decoding.
|
|
|
1656 Some of these flags are dependent on the coding system. */
|
|
|
1657 unsigned int flags;
|
|
|
1658
|
|
|
1659 /* CH holds a partially built-up character. Since we only deal
|
|
|
1660 with one- and two-byte characters at the moment, we only use
|
|
|
1661 this to store the first byte of a two-byte character. */
|
|
|
1662 unsigned int ch;
|
|
|
1663
|
|
|
1664 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
|
1665 currently applies. We need to keep this separate from the
|
|
|
1666 EOL type stored in CODESYS because the latter might indicate
|
|
|
1667 automatic EOL-type detection while the former will always
|
|
|
1668 indicate a particular EOL type. */
|
|
179
|
1669 enum eol_type eol_type;
|
|
70
|
1670
|
|
|
1671 /* Additional ISO2022 information. We define the structure above
|
|
|
1672 because it's also needed by the detection routines. */
|
|
|
1673 struct iso2022_decoder iso2022;
|
|
183
|
1674
|
|
70
|
1675 /* Additional information (the state of the running CCL program)
|
|
|
1676 used by the CCL decoder. */
|
|
|
1677 struct ccl_program ccl;
|
|
|
1678
|
|
|
1679 struct detection_state decst;
|
|
|
1680 };
|
|
|
1681
|
|
272
|
1682 static int decoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
|
1683 static int decoding_writer (Lstream *stream, CONST unsigned char *data, size_t size);
|
|
70
|
1684 static int decoding_rewinder (Lstream *stream);
|
|
|
1685 static int decoding_seekable_p (Lstream *stream);
|
|
|
1686 static int decoding_flusher (Lstream *stream);
|
|
|
1687 static int decoding_closer (Lstream *stream);
|
|
|
1688 static Lisp_Object decoding_marker (Lisp_Object stream,
|
|
|
1689 void (*markobj) (Lisp_Object));
|
|
|
1690
|
|
|
1691 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
|
1692 sizeof (struct decoding_stream));
|
|
|
1693
|
|
|
1694 static Lisp_Object
|
|
|
1695 decoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
|
1696 {
|
|
|
1697 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
1698 Lisp_Object str_obj;
|
|
|
1699
|
|
|
1700 /* We do not need to mark the coding systems or charsets stored
|
|
|
1701 within the stream because they are stored in a global list
|
|
|
1702 and automatically marked. */
|
|
|
1703
|
|
|
1704 XSETLSTREAM (str_obj, str);
|
|
|
1705 (markobj) (str_obj);
|
|
|
1706 if (str->imp->marker)
|
|
|
1707 return (str->imp->marker) (str_obj, markobj);
|
|
|
1708 else
|
|
|
1709 return Qnil;
|
|
|
1710 }
|
|
|
1711
|
|
|
1712 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
|
1713 so we read data from the other end, decode it, and store it into DATA. */
|
|
|
1714
|
|
|
1715 static int
|
|
272
|
1716 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
70
|
1717 {
|
|
|
1718 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1719 unsigned char *orig_data = data;
|
|
|
1720 int read_size;
|
|
|
1721 int error_occurred = 0;
|
|
|
1722
|
|
|
1723 /* We need to interface to mule_decode(), which expects to take some
|
|
|
1724 amount of data and store the result into a Dynarr. We have
|
|
|
1725 mule_decode() store into str->runoff, and take data from there
|
|
|
1726 as necessary. */
|
|
|
1727
|
|
|
1728 /* We loop until we have enough data, reading chunks from the other
|
|
|
1729 end and decoding it. */
|
|
|
1730 while (1)
|
|
|
1731 {
|
|
|
1732 /* Take data from the runoff if we can. Make sure to take at
|
|
|
1733 most SIZE bytes, and delete the data from the runoff. */
|
|
|
1734 if (Dynarr_length (str->runoff) > 0)
|
|
|
1735 {
|
|
272
|
1736 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
|
|
70
|
1737 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
1738 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
1739 data += chunk;
|
|
|
1740 size -= chunk;
|
|
|
1741 }
|
|
|
1742
|
|
|
1743 if (size == 0)
|
|
|
1744 break; /* No more room for data */
|
|
|
1745
|
|
|
1746 if (str->flags & CODING_STATE_END)
|
|
|
1747 /* This means that on the previous iteration, we hit the EOF on
|
|
|
1748 the other end. We loop once more so that mule_decode() can
|
|
|
1749 output any final stuff it may be holding, or any "go back
|
|
|
1750 to a sane state" escape sequences. (This latter makes sense
|
|
|
1751 during encoding.) */
|
|
|
1752 break;
|
|
|
1753
|
|
|
1754 /* Exhausted the runoff, so get some more. DATA has at least
|
|
|
1755 SIZE bytes left of storage in it, so it's OK to read directly
|
|
|
1756 into it. (We'll be overwriting above, after we've decoded it
|
|
|
1757 into the runoff.) */
|
|
|
1758 read_size = Lstream_read (str->other_end, data, size);
|
|
|
1759 if (read_size < 0)
|
|
|
1760 {
|
|
|
1761 error_occurred = 1;
|
|
|
1762 break;
|
|
|
1763 }
|
|
|
1764 if (read_size == 0)
|
|
|
1765 /* There might be some more end data produced in the translation.
|
|
|
1766 See the comment above. */
|
|
|
1767 str->flags |= CODING_STATE_END;
|
|
|
1768 mule_decode (stream, data, str->runoff, read_size);
|
|
|
1769 }
|
|
|
1770
|
|
|
1771 if (data - orig_data == 0)
|
|
|
1772 return error_occurred ? -1 : 0;
|
|
|
1773 else
|
|
|
1774 return data - orig_data;
|
|
|
1775 }
|
|
|
1776
|
|
|
1777 static int
|
|
272
|
1778 decoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
|
70
|
1779 {
|
|
|
1780 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1781 int retval;
|
|
|
1782
|
|
|
1783 /* Decode all our data into the runoff, and then attempt to write
|
|
|
1784 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
1785 in writing. */
|
|
|
1786 mule_decode (stream, data, str->runoff, size);
|
|
|
1787 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
1788 Dynarr_length (str->runoff));
|
|
|
1789 if (retval > 0)
|
|
|
1790 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
1791 /* Do NOT return retval. The return value indicates how much
|
|
|
1792 of the incoming data was written, not how many bytes were
|
|
|
1793 written. */
|
|
|
1794 return size;
|
|
|
1795 }
|
|
|
1796
|
|
|
1797 static void
|
|
|
1798 reset_decoding_stream (struct decoding_stream *str)
|
|
|
1799 {
|
|
|
1800 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
1801 {
|
|
272
|
1802 Lisp_Object coding_system;
|
|
70
|
1803 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
1804 reset_iso2022 (coding_system, &str->iso2022);
|
|
|
1805 }
|
|
|
1806 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
1807 {
|
|
213
|
1808 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
|
|
70
|
1809 }
|
|
183
|
1810
|
|
70
|
1811 str->flags = str->ch = 0;
|
|
|
1812 }
|
|
|
1813
|
|
|
1814 static int
|
|
|
1815 decoding_rewinder (Lstream *stream)
|
|
|
1816 {
|
|
|
1817 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1818 reset_decoding_stream (str);
|
|
|
1819 Dynarr_reset (str->runoff);
|
|
|
1820 return Lstream_rewind (str->other_end);
|
|
|
1821 }
|
|
|
1822
|
|
|
1823 static int
|
|
|
1824 decoding_seekable_p (Lstream *stream)
|
|
|
1825 {
|
|
|
1826 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1827 return Lstream_seekable_p (str->other_end);
|
|
|
1828 }
|
|
|
1829
|
|
|
1830 static int
|
|
|
1831 decoding_flusher (Lstream *stream)
|
|
|
1832 {
|
|
|
1833 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1834 return Lstream_flush (str->other_end);
|
|
|
1835 }
|
|
|
1836
|
|
|
1837 static int
|
|
|
1838 decoding_closer (Lstream *stream)
|
|
|
1839 {
|
|
|
1840 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1841 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
1842 {
|
|
|
1843 str->flags |= CODING_STATE_END;
|
|
|
1844 decoding_writer (stream, 0, 0);
|
|
|
1845 }
|
|
|
1846 Dynarr_free (str->runoff);
|
|
|
1847 if (str->iso2022.composite_chars)
|
|
|
1848 Dynarr_free (str->iso2022.composite_chars);
|
|
|
1849 return Lstream_close (str->other_end);
|
|
|
1850 }
|
|
|
1851
|
|
|
1852 Lisp_Object
|
|
|
1853 decoding_stream_coding_system (Lstream *stream)
|
|
|
1854 {
|
|
272
|
1855 Lisp_Object coding_system;
|
|
70
|
1856 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1857
|
|
|
1858 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
1859 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
|
1860 }
|
|
|
1861
|
|
|
1862 void
|
|
|
1863 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
1864 {
|
|
|
1865 struct Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
1866 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
1867 str->codesys = cs;
|
|
|
1868 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
1869 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
|
1870 reset_decoding_stream (str);
|
|
|
1871 }
|
|
|
1872
|
|
|
1873 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
|
1874 stream for writing, no automatic code detection will be performed.
|
|
|
1875 The reason for this is that automatic code detection requires a
|
|
|
1876 seekable input. Things will also fail if you open a decoding
|
|
|
1877 stream for reading using a non-fully-specified coding system and
|
|
|
1878 a non-seekable input stream. */
|
|
|
1879
|
|
|
1880 static Lisp_Object
|
|
|
1881 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
1882 CONST char *mode)
|
|
|
1883 {
|
|
|
1884 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
|
1885 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
1886 Lisp_Object obj;
|
|
|
1887
|
|
272
|
1888 xzero (*str);
|
|
70
|
1889 str->other_end = stream;
|
|
185
|
1890 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
|
|
70
|
1891 str->eol_type = EOL_AUTODETECT;
|
|
|
1892 if (!strcmp (mode, "r")
|
|
|
1893 && Lstream_seekable_p (stream))
|
|
|
1894 /* We can determine the coding system now. */
|
|
|
1895 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
|
1896 set_decoding_stream_coding_system (lstr, codesys);
|
|
|
1897 str->decst.eol_type = str->eol_type;
|
|
|
1898 str->decst.mask = ~0;
|
|
|
1899 XSETLSTREAM (obj, lstr);
|
|
|
1900 return obj;
|
|
|
1901 }
|
|
|
1902
|
|
|
1903 Lisp_Object
|
|
|
1904 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
1905 {
|
|
|
1906 return make_decoding_stream_1 (stream, codesys, "r");
|
|
|
1907 }
|
|
|
1908
|
|
|
1909 Lisp_Object
|
|
|
1910 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
1911 {
|
|
|
1912 return make_decoding_stream_1 (stream, codesys, "w");
|
|
|
1913 }
|
|
|
1914
|
|
181
|
1915 /* Note: the decode_coding_* functions all take the same
|
|
70
|
1916 arguments as mule_decode(), which is to say some SRC data of
|
|
|
1917 size N, which is to be stored into dynamic array DST.
|
|
|
1918 DECODING is the stream within which the decoding is
|
|
|
1919 taking place, but no data is actually read from or
|
|
|
1920 written to that stream; that is handled in decoding_reader()
|
|
|
1921 or decoding_writer(). This allows the same functions to
|
|
|
1922 be used for both reading and writing. */
|
|
|
1923
|
|
|
1924 static void
|
|
|
1925 mule_decode (Lstream *decoding, CONST unsigned char *src,
|
|
|
1926 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
1927 {
|
|
|
1928 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
1929
|
|
|
1930 /* If necessary, do encoding-detection now. We do this when
|
|
|
1931 we're a writing stream or a non-seekable reading stream,
|
|
|
1932 meaning that we can't just process the whole input,
|
|
|
1933 rewind, and start over. */
|
|
183
|
1934
|
|
70
|
1935 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
|
1936 str->eol_type == EOL_AUTODETECT)
|
|
|
1937 {
|
|
272
|
1938 Lisp_Object codesys;
|
|
70
|
1939
|
|
|
1940 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
|
1941 detect_coding_type (&str->decst, src, n,
|
|
|
1942 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
|
1943 CODESYS_AUTODETECT);
|
|
|
1944 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
|
1945 str->decst.mask != ~0)
|
|
|
1946 /* #### This is cheesy. What we really ought to do is
|
|
|
1947 buffer up a certain amount of data so as to get a
|
|
|
1948 less random result. */
|
|
|
1949 codesys = coding_system_from_mask (str->decst.mask);
|
|
|
1950 str->eol_type = str->decst.eol_type;
|
|
|
1951 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
|
1952 {
|
|
|
1953 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
|
1954 If we erase it, bad things might happen. */
|
|
|
1955 int was_end = str->flags & CODING_STATE_END;
|
|
|
1956 set_decoding_stream_coding_system (decoding, codesys);
|
|
|
1957 if (was_end)
|
|
|
1958 str->flags |= CODING_STATE_END;
|
|
|
1959 }
|
|
|
1960 }
|
|
183
|
1961
|
|
70
|
1962 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
1963 {
|
|
|
1964 #ifdef DEBUG_XEMACS
|
|
|
1965 case CODESYS_INTERNAL:
|
|
|
1966 Dynarr_add_many (dst, src, n);
|
|
|
1967 break;
|
|
|
1968 #endif
|
|
|
1969 case CODESYS_AUTODETECT:
|
|
|
1970 /* If we got this far and still haven't decided on the coding
|
|
|
1971 system, then do no conversion. */
|
|
|
1972 case CODESYS_NO_CONVERSION:
|
|
|
1973 decode_coding_no_conversion (decoding, src, dst, n);
|
|
|
1974 break;
|
|
|
1975 case CODESYS_SHIFT_JIS:
|
|
74
|
1976 decode_coding_sjis (decoding, src, dst, n);
|
|
70
|
1977 break;
|
|
|
1978 case CODESYS_BIG5:
|
|
|
1979 decode_coding_big5 (decoding, src, dst, n);
|
|
|
1980 break;
|
|
|
1981 case CODESYS_CCL:
|
|
213
|
1982 ccl_driver (&str->ccl, src, dst, n, 0);
|
|
70
|
1983 break;
|
|
|
1984 case CODESYS_ISO2022:
|
|
|
1985 decode_coding_iso2022 (decoding, src, dst, n);
|
|
|
1986 break;
|
|
|
1987 default:
|
|
|
1988 abort ();
|
|
|
1989 }
|
|
|
1990 }
|
|
|
1991
|
|
|
1992 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
1993 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
1994 This is useful if you've read in encoded text from a file without decoding
|
|
|
1995 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
185
|
1996 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
70
|
1997 Return length of decoded text.
|
|
|
1998 BUFFER defaults to the current buffer if unspecified.
|
|
|
1999 */
|
|
|
2000 (start, end, coding_system, buffer))
|
|
|
2001 {
|
|
|
2002 Bufpos b, e;
|
|
|
2003 struct buffer *buf = decode_buffer (buffer, 0);
|
|
185
|
2004 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2005 Lstream *istr, *ostr;
|
|
|
2006 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
70
|
2007
|
|
|
2008 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
96
|
2009
|
|
|
2010 barf_if_buffer_read_only (buf, b, e);
|
|
|
2011
|
|
70
|
2012 coding_system = Fget_coding_system (coding_system);
|
|
185
|
2013 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2014 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2015 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2016 coding_system);
|
|
|
2017 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
70
|
2018 Fget_coding_system (Qbinary));
|
|
185
|
2019 istr = XLSTREAM (instream);
|
|
|
2020 ostr = XLSTREAM (outstream);
|
|
|
2021 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
|
|
70
|
2022
|
|
|
2023 /* The chain of streams looks like this:
|
|
|
2024
|
|
|
2025 [BUFFER] <----- send through
|
|
|
2026 ------> [ENCODE AS BINARY]
|
|
|
2027 ------> [DECODE AS SPECIFIED]
|
|
|
2028 ------> [BUFFER]
|
|
|
2029 */
|
|
|
2030
|
|
185
|
2031 while (1)
|
|
|
2032 {
|
|
|
2033 char tempbuf[1024]; /* some random amount */
|
|
|
2034 Bufpos newpos, even_newer_pos;
|
|
|
2035 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2036 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2037
|
|
|
2038 if (!size_in_bytes)
|
|
|
2039 break;
|
|
|
2040 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2041 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2042 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2043 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2044 even_newer_pos, 0);
|
|
|
2045 }
|
|
|
2046 Lstream_close (istr);
|
|
|
2047 Lstream_close (ostr);
|
|
70
|
2048 UNGCPRO;
|
|
185
|
2049 Lstream_delete (istr);
|
|
|
2050 Lstream_delete (ostr);
|
|
|
2051 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2052 Lstream_delete (XLSTREAM (lb_outstream));
|
|
70
|
2053 return Qnil;
|
|
|
2054 }
|
|
|
2055
|
|
|
2056
|
|
|
2057 /************************************************************************/
|
|
|
2058 /* Converting to an external encoding ("encoding") */
|
|
|
2059 /************************************************************************/
|
|
|
2060
|
|
|
2061 /* An encoding stream is an output stream. When you create the
|
|
|
2062 stream, you specify the coding system that governs the encoding
|
|
|
2063 and another stream that the resulting encoded data is to be
|
|
|
2064 sent to, and then start sending data to it. */
|
|
|
2065
|
|
|
2066 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
|
2067
|
|
|
2068 struct encoding_stream
|
|
|
2069 {
|
|
|
2070 /* Coding system that governs the conversion. */
|
|
|
2071 struct Lisp_Coding_System *codesys;
|
|
|
2072
|
|
|
2073 /* Stream that we read the encoded data from or
|
|
|
2074 write the decoded data to. */
|
|
|
2075 Lstream *other_end;
|
|
|
2076
|
|
|
2077 /* If we are reading, then we can return only a fixed amount of
|
|
|
2078 data, so if the conversion resulted in too much data, we store it
|
|
|
2079 here for retrieval the next time around. */
|
|
|
2080 unsigned_char_dynarr *runoff;
|
|
|
2081
|
|
|
2082 /* FLAGS holds flags indicating the current state of the encoding.
|
|
|
2083 Some of these flags are dependent on the coding system. */
|
|
|
2084 unsigned int flags;
|
|
|
2085
|
|
|
2086 /* CH holds a partially built-up character. Since we only deal
|
|
|
2087 with one- and two-byte characters at the moment, we only use
|
|
|
2088 this to store the first byte of a two-byte character. */
|
|
|
2089 unsigned int ch;
|
|
|
2090
|
|
|
2091 /* Additional information used by the ISO2022 encoder. */
|
|
|
2092 struct
|
|
|
2093 {
|
|
|
2094 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
2095 through G3 registers. It is initialized from the array
|
|
|
2096 INITIAL_CHARSET in CODESYS. */
|
|
|
2097 Lisp_Object charset[4];
|
|
|
2098
|
|
|
2099 /* Which registers are currently invoked into the left (GL) and
|
|
|
2100 right (GR) halves of the 8-bit encoding space? */
|
|
|
2101 int register_left, register_right;
|
|
|
2102
|
|
|
2103 /* Whether we need to explicitly designate the charset in the
|
|
|
2104 G? register before using it. It is initialized from the
|
|
|
2105 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
|
2106 unsigned char force_charset_on_output[4];
|
|
|
2107
|
|
|
2108 /* Other state variables that need to be preserved across
|
|
|
2109 invocations. */
|
|
|
2110 Lisp_Object current_charset;
|
|
|
2111 int current_half;
|
|
|
2112 int current_char_boundary;
|
|
|
2113 } iso2022;
|
|
|
2114
|
|
|
2115 /* Additional information (the state of the running CCL program)
|
|
|
2116 used by the CCL encoder. */
|
|
|
2117 struct ccl_program ccl;
|
|
|
2118 };
|
|
|
2119
|
|
272
|
2120 static int encoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
70
|
2121 static int encoding_writer (Lstream *stream, CONST unsigned char *data,
|
|
272
|
2122 size_t size);
|
|
70
|
2123 static int encoding_rewinder (Lstream *stream);
|
|
|
2124 static int encoding_seekable_p (Lstream *stream);
|
|
|
2125 static int encoding_flusher (Lstream *stream);
|
|
|
2126 static int encoding_closer (Lstream *stream);
|
|
|
2127 static Lisp_Object encoding_marker (Lisp_Object stream,
|
|
|
2128 void (*markobj) (Lisp_Object));
|
|
|
2129
|
|
|
2130 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
|
2131 sizeof (struct encoding_stream));
|
|
|
2132
|
|
|
2133 static Lisp_Object
|
|
|
2134 encoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
|
2135 {
|
|
|
2136 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2137 Lisp_Object str_obj;
|
|
|
2138
|
|
|
2139 /* We do not need to mark the coding systems or charsets stored
|
|
|
2140 within the stream because they are stored in a global list
|
|
|
2141 and automatically marked. */
|
|
|
2142
|
|
|
2143 XSETLSTREAM (str_obj, str);
|
|
|
2144 (markobj) (str_obj);
|
|
|
2145 if (str->imp->marker)
|
|
|
2146 return (str->imp->marker) (str_obj, markobj);
|
|
|
2147 else
|
|
|
2148 return Qnil;
|
|
|
2149 }
|
|
|
2150
|
|
|
2151 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
|
2152 so we read data from the other end, encode it, and store it into DATA. */
|
|
|
2153
|
|
|
2154 static int
|
|
272
|
2155 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
70
|
2156 {
|
|
|
2157 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2158 unsigned char *orig_data = data;
|
|
|
2159 int read_size;
|
|
|
2160 int error_occurred = 0;
|
|
|
2161
|
|
|
2162 /* We need to interface to mule_encode(), which expects to take some
|
|
|
2163 amount of data and store the result into a Dynarr. We have
|
|
|
2164 mule_encode() store into str->runoff, and take data from there
|
|
|
2165 as necessary. */
|
|
|
2166
|
|
|
2167 /* We loop until we have enough data, reading chunks from the other
|
|
|
2168 end and encoding it. */
|
|
|
2169 while (1)
|
|
|
2170 {
|
|
|
2171 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2172 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2173 if (Dynarr_length (str->runoff) > 0)
|
|
|
2174 {
|
|
272
|
2175 int chunk = min ((int) size, Dynarr_length (str->runoff));
|
|
70
|
2176 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2177 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2178 data += chunk;
|
|
|
2179 size -= chunk;
|
|
|
2180 }
|
|
|
2181
|
|
|
2182 if (size == 0)
|
|
|
2183 break; /* No more room for data */
|
|
|
2184
|
|
|
2185 if (str->flags & CODING_STATE_END)
|
|
|
2186 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2187 the other end. We loop once more so that mule_encode() can
|
|
|
2188 output any final stuff it may be holding, or any "go back
|
|
|
2189 to a sane state" escape sequences. (This latter makes sense
|
|
|
2190 during encoding.) */
|
|
|
2191 break;
|
|
|
2192
|
|
|
2193 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
|
2194 left of storage in it, so it's OK to read directly into it.
|
|
|
2195 (We'll be overwriting above, after we've encoded it into the
|
|
|
2196 runoff.) */
|
|
|
2197 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2198 if (read_size < 0)
|
|
|
2199 {
|
|
|
2200 error_occurred = 1;
|
|
|
2201 break;
|
|
|
2202 }
|
|
|
2203 if (read_size == 0)
|
|
|
2204 /* There might be some more end data produced in the translation.
|
|
|
2205 See the comment above. */
|
|
|
2206 str->flags |= CODING_STATE_END;
|
|
|
2207 mule_encode (stream, data, str->runoff, read_size);
|
|
|
2208 }
|
|
|
2209
|
|
181
|
2210 if (data == orig_data)
|
|
70
|
2211 return error_occurred ? -1 : 0;
|
|
|
2212 else
|
|
|
2213 return data - orig_data;
|
|
|
2214 }
|
|
|
2215
|
|
|
2216 static int
|
|
272
|
2217 encoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
|
70
|
2218 {
|
|
|
2219 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2220 int retval;
|
|
|
2221
|
|
|
2222 /* Encode all our data into the runoff, and then attempt to write
|
|
|
2223 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2224 in writing. */
|
|
|
2225 mule_encode (stream, data, str->runoff, size);
|
|
|
2226 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2227 Dynarr_length (str->runoff));
|
|
|
2228 if (retval > 0)
|
|
|
2229 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2230 /* Do NOT return retval. The return value indicates how much
|
|
|
2231 of the incoming data was written, not how many bytes were
|
|
|
2232 written. */
|
|
|
2233 return size;
|
|
|
2234 }
|
|
|
2235
|
|
|
2236 static void
|
|
|
2237 reset_encoding_stream (struct encoding_stream *str)
|
|
|
2238 {
|
|
181
|
2239 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
70
|
2240 {
|
|
181
|
2241 case CODESYS_ISO2022:
|
|
|
2242 {
|
|
|
2243 int i;
|
|
|
2244
|
|
|
2245 for (i = 0; i < 4; i++)
|
|
|
2246 {
|
|
|
2247 str->iso2022.charset[i] =
|
|
|
2248 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
|
2249 str->iso2022.force_charset_on_output[i] =
|
|
|
2250 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
|
2251 }
|
|
|
2252 str->iso2022.register_left = 0;
|
|
|
2253 str->iso2022.register_right = 1;
|
|
|
2254 str->iso2022.current_charset = Qnil;
|
|
|
2255 str->iso2022.current_half = 0;
|
|
|
2256 str->iso2022.current_char_boundary = 1;
|
|
|
2257 break;
|
|
|
2258 }
|
|
|
2259 case CODESYS_CCL:
|
|
213
|
2260 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
|
|
181
|
2261 break;
|
|
|
2262 default:
|
|
|
2263 break;
|
|
70
|
2264 }
|
|
183
|
2265
|
|
70
|
2266 str->flags = str->ch = 0;
|
|
|
2267 }
|
|
|
2268
|
|
|
2269 static int
|
|
|
2270 encoding_rewinder (Lstream *stream)
|
|
|
2271 {
|
|
|
2272 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2273 reset_encoding_stream (str);
|
|
|
2274 Dynarr_reset (str->runoff);
|
|
|
2275 return Lstream_rewind (str->other_end);
|
|
|
2276 }
|
|
|
2277
|
|
|
2278 static int
|
|
|
2279 encoding_seekable_p (Lstream *stream)
|
|
|
2280 {
|
|
|
2281 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2282 return Lstream_seekable_p (str->other_end);
|
|
|
2283 }
|
|
|
2284
|
|
|
2285 static int
|
|
|
2286 encoding_flusher (Lstream *stream)
|
|
|
2287 {
|
|
|
2288 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2289 return Lstream_flush (str->other_end);
|
|
|
2290 }
|
|
|
2291
|
|
|
2292 static int
|
|
|
2293 encoding_closer (Lstream *stream)
|
|
|
2294 {
|
|
|
2295 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2296 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2297 {
|
|
|
2298 str->flags |= CODING_STATE_END;
|
|
|
2299 encoding_writer (stream, 0, 0);
|
|
|
2300 }
|
|
|
2301 Dynarr_free (str->runoff);
|
|
|
2302 return Lstream_close (str->other_end);
|
|
|
2303 }
|
|
|
2304
|
|
|
2305 Lisp_Object
|
|
|
2306 encoding_stream_coding_system (Lstream *stream)
|
|
|
2307 {
|
|
272
|
2308 Lisp_Object coding_system;
|
|
70
|
2309 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2310
|
|
|
2311 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2312 return coding_system;
|
|
|
2313 }
|
|
|
2314
|
|
|
2315 void
|
|
|
2316 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2317 {
|
|
|
2318 struct Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
2319 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2320 str->codesys = cs;
|
|
|
2321 reset_encoding_stream (str);
|
|
|
2322 }
|
|
|
2323
|
|
|
2324 static Lisp_Object
|
|
|
2325 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
2326 CONST char *mode)
|
|
|
2327 {
|
|
|
2328 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
|
2329 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2330 Lisp_Object obj;
|
|
|
2331
|
|
272
|
2332 xzero (*str);
|
|
185
|
2333 str->runoff = Dynarr_new (unsigned_char);
|
|
70
|
2334 str->other_end = stream;
|
|
|
2335 set_encoding_stream_coding_system (lstr, codesys);
|
|
|
2336 XSETLSTREAM (obj, lstr);
|
|
|
2337 return obj;
|
|
|
2338 }
|
|
|
2339
|
|
|
2340 Lisp_Object
|
|
|
2341 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2342 {
|
|
|
2343 return make_encoding_stream_1 (stream, codesys, "r");
|
|
|
2344 }
|
|
|
2345
|
|
|
2346 Lisp_Object
|
|
|
2347 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2348 {
|
|
|
2349 return make_encoding_stream_1 (stream, codesys, "w");
|
|
|
2350 }
|
|
|
2351
|
|
|
2352 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
|
2353 external format, according to the encoding stream ENCODING.
|
|
|
2354 Store the encoded data into DST. */
|
|
|
2355
|
|
|
2356 static void
|
|
|
2357 mule_encode (Lstream *encoding, CONST unsigned char *src,
|
|
|
2358 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2359 {
|
|
|
2360 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2361
|
|
|
2362 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2363 {
|
|
|
2364 #ifdef DEBUG_XEMACS
|
|
|
2365 case CODESYS_INTERNAL:
|
|
|
2366 Dynarr_add_many (dst, src, n);
|
|
|
2367 break;
|
|
|
2368 #endif
|
|
|
2369 case CODESYS_AUTODETECT:
|
|
|
2370 /* If we got this far and still haven't decided on the coding
|
|
|
2371 system, then do no conversion. */
|
|
|
2372 case CODESYS_NO_CONVERSION:
|
|
|
2373 encode_coding_no_conversion (encoding, src, dst, n);
|
|
|
2374 break;
|
|
|
2375 case CODESYS_SHIFT_JIS:
|
|
74
|
2376 encode_coding_sjis (encoding, src, dst, n);
|
|
70
|
2377 break;
|
|
|
2378 case CODESYS_BIG5:
|
|
|
2379 encode_coding_big5 (encoding, src, dst, n);
|
|
|
2380 break;
|
|
|
2381 case CODESYS_CCL:
|
|
213
|
2382 ccl_driver (&str->ccl, src, dst, n, 0);
|
|
70
|
2383 break;
|
|
|
2384 case CODESYS_ISO2022:
|
|
|
2385 encode_coding_iso2022 (encoding, src, dst, n);
|
|
|
2386 break;
|
|
|
2387 default:
|
|
|
2388 abort ();
|
|
|
2389 }
|
|
|
2390 }
|
|
|
2391
|
|
|
2392 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2393 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2394 This will, for example, convert Japanese characters into stuff such as
|
|
185
|
2395 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
70
|
2396 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2397 */
|
|
|
2398 (start, end, coding_system, buffer))
|
|
|
2399 {
|
|
|
2400 Bufpos b, e;
|
|
|
2401 struct buffer *buf = decode_buffer (buffer, 0);
|
|
185
|
2402 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2403 Lstream *istr, *ostr;
|
|
|
2404 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
70
|
2405
|
|
|
2406 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
96
|
2407
|
|
|
2408 barf_if_buffer_read_only (buf, b, e);
|
|
|
2409
|
|
70
|
2410 coding_system = Fget_coding_system (coding_system);
|
|
74
|
2411 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
185
|
2412 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2413 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2414 Fget_coding_system (Qbinary));
|
|
|
2415 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
70
|
2416 coding_system);
|
|
185
|
2417 istr = XLSTREAM (instream);
|
|
|
2418 ostr = XLSTREAM (outstream);
|
|
|
2419 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
|
|
70
|
2420 /* The chain of streams looks like this:
|
|
|
2421
|
|
|
2422 [BUFFER] <----- send through
|
|
|
2423 ------> [ENCODE AS SPECIFIED]
|
|
|
2424 ------> [DECODE AS BINARY]
|
|
|
2425 ------> [BUFFER]
|
|
|
2426 */
|
|
|
2427 while (1)
|
|
|
2428 {
|
|
185
|
2429 char tempbuf[1024]; /* some random amount */
|
|
|
2430 Bufpos newpos, even_newer_pos;
|
|
|
2431 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2432 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2433
|
|
70
|
2434 if (!size_in_bytes)
|
|
|
2435 break;
|
|
185
|
2436 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2437 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2438 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
70
|
2439 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2440 even_newer_pos, 0);
|
|
|
2441 }
|
|
|
2442
|
|
|
2443 {
|
|
|
2444 Charcount retlen =
|
|
|
2445 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
185
|
2446 Lstream_close (istr);
|
|
|
2447 Lstream_close (ostr);
|
|
70
|
2448 UNGCPRO;
|
|
185
|
2449 Lstream_delete (istr);
|
|
|
2450 Lstream_delete (ostr);
|
|
|
2451 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2452 Lstream_delete (XLSTREAM (lb_outstream));
|
|
70
|
2453 return make_int (retlen);
|
|
|
2454 }
|
|
|
2455 }
|
|
|
2456
|
|
|
2457
|
|
|
2458 /************************************************************************/
|
|
|
2459 /* Shift-JIS methods */
|
|
|
2460 /************************************************************************/
|
|
|
2461
|
|
|
2462 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
|
2463 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
|
|
2464 as is. A character of JISX0201-Kana (TYPE94 character set) is
|
|
|
2465 encoded by "position-code + 0x80". A character of JISX0208
|
|
|
2466 (TYPE94x94 character set) is encoded in 2-byte but two
|
|
|
2467 position-codes are divided and shifted so that it fit in the range
|
|
|
2468 below.
|
|
|
2469
|
|
|
2470 --- CODE RANGE of Shift-JIS ---
|
|
|
2471 (character set) (range)
|
|
|
2472 ASCII 0x00 .. 0x7F
|
|
|
2473 JISX0201-Kana 0xA0 .. 0xDF
|
|
|
2474 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
|
2475 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
|
2476 -------------------------------
|
|
|
2477
|
|
|
2478 */
|
|
|
2479
|
|
|
2480 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
|
2481
|
|
74
|
2482 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
|
|
70
|
2483 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
|
2484
|
|
|
2485 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2486
|
|
74
|
2487 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
|
|
70
|
2488 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
|
2489
|
|
74
|
2490 #define BYTE_SJIS_KATAKANA_P(c) \
|
|
70
|
2491 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
|
2492
|
|
|
2493 static int
|
|
74
|
2494 detect_coding_sjis (struct detection_state *st, CONST unsigned char *src,
|
|
|
2495 unsigned int n)
|
|
70
|
2496 {
|
|
|
2497 int c;
|
|
|
2498
|
|
|
2499 while (n--)
|
|
|
2500 {
|
|
|
2501 c = *src++;
|
|
|
2502 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
2503 return 0;
|
|
|
2504 if (st->shift_jis.in_second_byte)
|
|
|
2505 {
|
|
|
2506 st->shift_jis.in_second_byte = 0;
|
|
|
2507 if (c < 0x40)
|
|
|
2508 return 0;
|
|
|
2509 }
|
|
|
2510 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
|
2511 st->shift_jis.in_second_byte = 1;
|
|
|
2512 }
|
|
|
2513 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
|
2514 }
|
|
|
2515
|
|
|
2516 /* Convert Shift-JIS data to internal format. */
|
|
|
2517
|
|
|
2518 static void
|
|
74
|
2519 decode_coding_sjis (Lstream *decoding, CONST unsigned char *src,
|
|
|
2520 unsigned_char_dynarr *dst, unsigned int n)
|
|
70
|
2521 {
|
|
|
2522 unsigned char c;
|
|
|
2523 unsigned int flags, ch;
|
|
181
|
2524 enum eol_type eol_type;
|
|
70
|
2525 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2526
|
|
|
2527 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2528 eol_type = str->eol_type;
|
|
70
|
2529
|
|
|
2530 while (n--)
|
|
|
2531 {
|
|
|
2532 c = *src++;
|
|
183
|
2533
|
|
70
|
2534 if (ch)
|
|
|
2535 {
|
|
|
2536 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
74
|
2537 if (BYTE_SJIS_TWO_BYTE_2_P (c))
|
|
70
|
2538 {
|
|
|
2539 unsigned char e1, e2;
|
|
|
2540
|
|
|
2541 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
74
|
2542 DECODE_SJIS (ch, c, e1, e2);
|
|
70
|
2543 Dynarr_add (dst, e1);
|
|
|
2544 Dynarr_add (dst, e2);
|
|
|
2545 }
|
|
|
2546 else
|
|
|
2547 {
|
|
|
2548 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2549 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2550 }
|
|
|
2551 ch = 0;
|
|
|
2552 }
|
|
|
2553 else
|
|
|
2554 {
|
|
181
|
2555 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
74
|
2556 if (BYTE_SJIS_TWO_BYTE_1_P (c))
|
|
70
|
2557 ch = c;
|
|
74
|
2558 else if (BYTE_SJIS_KATAKANA_P (c))
|
|
70
|
2559 {
|
|
74
|
2560 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
|
|
70
|
2561 Dynarr_add (dst, c);
|
|
|
2562 }
|
|
|
2563 else
|
|
|
2564 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2565 }
|
|
|
2566 label_continue_loop:;
|
|
|
2567 }
|
|
|
2568
|
|
|
2569 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2570
|
|
|
2571 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2572 }
|
|
|
2573
|
|
|
2574 /* Convert internally-formatted data to Shift-JIS. */
|
|
|
2575
|
|
|
2576 static void
|
|
74
|
2577 encode_coding_sjis (Lstream *encoding, CONST unsigned char *src,
|
|
|
2578 unsigned_char_dynarr *dst, unsigned int n)
|
|
70
|
2579 {
|
|
|
2580 unsigned char c;
|
|
|
2581 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2582 unsigned int flags, ch;
|
|
181
|
2583 enum eol_type eol_type;
|
|
70
|
2584
|
|
|
2585 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2586 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
2587
|
|
|
2588 while (n--)
|
|
|
2589 {
|
|
|
2590 c = *src++;
|
|
|
2591 if (c == '\n')
|
|
|
2592 {
|
|
181
|
2593 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
2594 Dynarr_add (dst, '\r');
|
|
181
|
2595 if (eol_type != EOL_CR)
|
|
70
|
2596 Dynarr_add (dst, '\n');
|
|
|
2597 ch = 0;
|
|
|
2598 }
|
|
|
2599 else if (BYTE_ASCII_P (c))
|
|
|
2600 {
|
|
|
2601 Dynarr_add (dst, c);
|
|
|
2602 ch = 0;
|
|
|
2603 }
|
|
|
2604 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
74
|
2605 ch = (c == LEADING_BYTE_KATAKANA_JISX0201 ||
|
|
70
|
2606 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2607 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
|
2608 else if (ch)
|
|
|
2609 {
|
|
74
|
2610 if (ch == LEADING_BYTE_KATAKANA_JISX0201)
|
|
70
|
2611 {
|
|
|
2612 Dynarr_add (dst, c);
|
|
|
2613 ch = 0;
|
|
|
2614 }
|
|
|
2615 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2616 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
|
2617 ch = c;
|
|
|
2618 else
|
|
|
2619 {
|
|
|
2620 unsigned char j1, j2;
|
|
74
|
2621 ENCODE_SJIS (ch, c, j1, j2);
|
|
70
|
2622 Dynarr_add (dst, j1);
|
|
|
2623 Dynarr_add (dst, j2);
|
|
|
2624 ch = 0;
|
|
|
2625 }
|
|
|
2626 }
|
|
|
2627 }
|
|
|
2628
|
|
|
2629 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2630 }
|
|
|
2631
|
|
|
2632 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
|
2633 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
|
2634 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
|
2635 Return the corresponding character.
|
|
|
2636 */
|
|
|
2637 (code))
|
|
|
2638 {
|
|
|
2639 unsigned char c1, c2, s1, s2;
|
|
183
|
2640
|
|
70
|
2641 CHECK_CONS (code);
|
|
|
2642 CHECK_INT (XCAR (code));
|
|
|
2643 CHECK_INT (XCDR (code));
|
|
|
2644 s1 = XINT (XCAR (code));
|
|
|
2645 s2 = XINT (XCDR (code));
|
|
74
|
2646 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
|
|
|
2647 BYTE_SJIS_TWO_BYTE_2_P (s2))
|
|
70
|
2648 {
|
|
74
|
2649 DECODE_SJIS (s1, s2, c1, c2);
|
|
70
|
2650 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
|
2651 c1 & 0x7F, c2 & 0x7F));
|
|
|
2652 }
|
|
|
2653 else
|
|
|
2654 return Qnil;
|
|
|
2655 }
|
|
|
2656
|
|
|
2657 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
|
2658 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
|
2659 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
|
2660 */
|
|
|
2661 (ch))
|
|
|
2662 {
|
|
|
2663 Lisp_Object charset;
|
|
|
2664 int c1, c2, s1, s2;
|
|
183
|
2665
|
|
70
|
2666 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2667 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2668 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
|
2669 {
|
|
74
|
2670 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
70
|
2671 return Fcons (make_int (s1), make_int (s2));
|
|
|
2672 }
|
|
|
2673 else
|
|
|
2674 return Qnil;
|
|
|
2675 }
|
|
|
2676
|
|
|
2677
|
|
|
2678 /************************************************************************/
|
|
|
2679 /* Big5 methods */
|
|
|
2680 /************************************************************************/
|
|
|
2681
|
|
|
2682 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
|
2683 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
|
2684 character set and is encoded in two-byte.
|
|
|
2685
|
|
|
2686 --- CODE RANGE of BIG5 ---
|
|
|
2687 (character set) (range)
|
|
|
2688 ASCII 0x00 .. 0x7F
|
|
|
2689 Big5 (1st byte) 0xA1 .. 0xFE
|
|
|
2690 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
|
2691 --------------------------
|
|
|
2692
|
|
|
2693 Since the number of characters in Big5 is larger than maximum
|
|
|
2694 characters in Emacs' charset (96x96), it can't be handled as one
|
|
|
2695 charset. So, in Emacs, Big5 is devided into two: `charset-big5-1'
|
|
|
2696 and `charset-big5-2'. Both <type>s are TYPE94x94. The former
|
|
|
2697 contains frequently used characters and the latter contains less
|
|
|
2698 frequently used characters. */
|
|
|
2699
|
|
|
2700 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
|
2701 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
|
2702
|
|
|
2703 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2704
|
|
|
2705 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
|
2706 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
|
2707
|
|
|
2708 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
|
2709
|
|
|
2710 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
|
2711
|
|
|
2712 /* Code conversion macros. These are macros because they are used in
|
|
|
2713 inner loops during code conversion.
|
|
|
2714
|
|
|
2715 Note that temporary variables in macros introduce the classic
|
|
|
2716 dynamic-scoping problems with variable names. We use capital-
|
|
|
2717 lettered variables in the assumption that XEmacs does not use
|
|
|
2718 capital letters in variables except in a very formalized way
|
|
|
2719 (e.g. Qstring). */
|
|
|
2720
|
|
|
2721 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
|
2722 (lb, c1, c2). */
|
|
|
2723
|
|
|
2724 /* There is a much simpler way to split the Big5 charset into two.
|
|
|
2725 For the moment I'm going to leave the algorithm as-is because it
|
|
|
2726 claims to separate out the most-used characters into a single
|
|
|
2727 charset, which perhaps will lead to optimizations in various
|
|
|
2728 places.
|
|
|
2729
|
|
|
2730 The way the algorithm works is something like this:
|
|
|
2731
|
|
|
2732 Big5 can be viewed as a 94x157 charset, where the row is
|
|
|
2733 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
|
2734 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
|
2735 the split between low and high column numbers is apparently
|
|
|
2736 meaningless; ascending rows produce less and less frequent chars.
|
|
|
2737 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
|
2738 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
|
2739 second. To do the conversion, we convert the character into
|
|
|
2740 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
|
2741 is the second, etc. That way, the characters are ordered by
|
|
|
2742 decreasing frequency. Then we just chop the space in two
|
|
|
2743 and coerce the result into a 94x94 space.
|
|
|
2744 */
|
|
|
2745
|
|
|
2746 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
|
2747 { \
|
|
|
2748 int B1 = b1, B2 = b2; \
|
|
|
2749 unsigned int I \
|
|
|
2750 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
|
2751 \
|
|
|
2752 if (B1 < 0xC9) \
|
|
|
2753 { \
|
|
|
2754 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
|
2755 } \
|
|
|
2756 else \
|
|
|
2757 { \
|
|
|
2758 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
|
2759 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
|
2760 } \
|
|
|
2761 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
|
2762 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
|
2763 } while (0)
|
|
|
2764
|
|
|
2765 /* Convert the internal string representation of a Big5 character
|
|
|
2766 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
|
2767
|
|
|
2768 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
|
2769 { \
|
|
|
2770 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
|
2771 \
|
|
|
2772 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
|
2773 { \
|
|
|
2774 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
|
2775 } \
|
|
|
2776 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
|
2777 b2 = I % BIG5_SAME_ROW; \
|
|
|
2778 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
|
2779 } while (0)
|
|
|
2780
|
|
|
2781 static int
|
|
|
2782 detect_coding_big5 (struct detection_state *st, CONST unsigned char *src,
|
|
|
2783 unsigned int n)
|
|
|
2784 {
|
|
|
2785 int c;
|
|
|
2786
|
|
|
2787 while (n--)
|
|
|
2788 {
|
|
|
2789 c = *src++;
|
|
|
2790 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
|
2791 (c >= 0x80 && c <= 0xA0))
|
|
|
2792 return 0;
|
|
|
2793 if (st->big5.in_second_byte)
|
|
|
2794 {
|
|
|
2795 st->big5.in_second_byte = 0;
|
|
|
2796 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
|
2797 return 0;
|
|
|
2798 }
|
|
|
2799 else if (c >= 0xA1)
|
|
|
2800 st->big5.in_second_byte = 1;
|
|
|
2801 }
|
|
|
2802 return CODING_CATEGORY_BIG5_MASK;
|
|
|
2803 }
|
|
|
2804
|
|
|
2805 /* Convert Big5 data to internal format. */
|
|
|
2806
|
|
|
2807 static void
|
|
|
2808 decode_coding_big5 (Lstream *decoding, CONST unsigned char *src,
|
|
|
2809 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2810 {
|
|
|
2811 unsigned char c;
|
|
181
|
2812 unsigned int flags, ch;
|
|
|
2813 enum eol_type eol_type;
|
|
70
|
2814 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2815
|
|
|
2816 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2817 eol_type = str->eol_type;
|
|
70
|
2818
|
|
|
2819 while (n--)
|
|
|
2820 {
|
|
|
2821 c = *src++;
|
|
|
2822 if (ch)
|
|
|
2823 {
|
|
|
2824 /* Previous character was first byte of Big5 char. */
|
|
|
2825 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
|
2826 {
|
|
|
2827 unsigned char b1, b2, b3;
|
|
|
2828 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
|
2829 Dynarr_add (dst, b1);
|
|
|
2830 Dynarr_add (dst, b2);
|
|
|
2831 Dynarr_add (dst, b3);
|
|
|
2832 }
|
|
|
2833 else
|
|
|
2834 {
|
|
|
2835 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2836 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2837 }
|
|
|
2838 ch = 0;
|
|
|
2839 }
|
|
|
2840 else
|
|
|
2841 {
|
|
181
|
2842 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
2843 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
|
2844 ch = c;
|
|
|
2845 else
|
|
|
2846 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2847 }
|
|
|
2848 label_continue_loop:;
|
|
|
2849 }
|
|
183
|
2850
|
|
70
|
2851 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2852
|
|
|
2853 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2854 }
|
|
|
2855
|
|
|
2856 /* Convert internally-formatted data to Big5. */
|
|
|
2857
|
|
|
2858 static void
|
|
|
2859 encode_coding_big5 (Lstream *encoding, CONST unsigned char *src,
|
|
|
2860 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2861 {
|
|
|
2862 unsigned char c;
|
|
|
2863 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
181
|
2864 unsigned int flags, ch;
|
|
|
2865 enum eol_type eol_type;
|
|
70
|
2866
|
|
|
2867 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2868 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
2869
|
|
|
2870 while (n--)
|
|
|
2871 {
|
|
|
2872 c = *src++;
|
|
|
2873 if (c == '\n')
|
|
183
|
2874 {
|
|
181
|
2875 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
2876 Dynarr_add (dst, '\r');
|
|
181
|
2877 if (eol_type != EOL_CR)
|
|
70
|
2878 Dynarr_add (dst, '\n');
|
|
|
2879 }
|
|
|
2880 else if (BYTE_ASCII_P (c))
|
|
|
2881 {
|
|
|
2882 /* ASCII. */
|
|
|
2883 Dynarr_add (dst, c);
|
|
|
2884 }
|
|
|
2885 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
2886 {
|
|
|
2887 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
2888 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
2889 {
|
|
|
2890 /* A recognized leading byte. */
|
|
|
2891 ch = c;
|
|
|
2892 continue; /* not done with this character. */
|
|
|
2893 }
|
|
|
2894 /* otherwise just ignore this character. */
|
|
|
2895 }
|
|
|
2896 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
2897 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
2898 {
|
|
|
2899 /* Previous char was a recognized leading byte. */
|
|
|
2900 ch = (ch << 8) | c;
|
|
|
2901 continue; /* not done with this character. */
|
|
|
2902 }
|
|
|
2903 else if (ch)
|
|
|
2904 {
|
|
|
2905 /* Encountering second byte of a Big5 character. */
|
|
|
2906 unsigned char b1, b2;
|
|
|
2907
|
|
|
2908 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
|
2909 Dynarr_add (dst, b1);
|
|
|
2910 Dynarr_add (dst, b2);
|
|
|
2911 }
|
|
|
2912
|
|
|
2913 ch = 0;
|
|
|
2914 }
|
|
|
2915
|
|
|
2916 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2917 }
|
|
|
2918
|
|
|
2919
|
|
|
2920 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
|
2921 Decode a Big5 character CODE of BIG5 coding-system.
|
|
173
|
2922 CODE is the character code in BIG5, a cons of two integers.
|
|
70
|
2923 Return the corresponding character.
|
|
|
2924 */
|
|
|
2925 (code))
|
|
|
2926 {
|
|
|
2927 unsigned char c1, c2, b1, b2;
|
|
183
|
2928
|
|
70
|
2929 CHECK_CONS (code);
|
|
|
2930 CHECK_INT (XCAR (code));
|
|
|
2931 CHECK_INT (XCDR (code));
|
|
|
2932 b1 = XINT (XCAR (code));
|
|
|
2933 b2 = XINT (XCDR (code));
|
|
|
2934 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
|
2935 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
|
2936 {
|
|
173
|
2937 int leading_byte;
|
|
|
2938 Lisp_Object charset;
|
|
|
2939 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
|
|
|
2940 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
|
|
70
|
2941 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
|
2942 }
|
|
|
2943 else
|
|
|
2944 return Qnil;
|
|
|
2945 }
|
|
|
2946
|
|
|
2947 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
|
2948 Encode the Big5 character CH to BIG5 coding-system.
|
|
|
2949 Return the corresponding character code in Big5.
|
|
|
2950 */
|
|
|
2951 (ch))
|
|
|
2952 {
|
|
|
2953 Lisp_Object charset;
|
|
|
2954 int c1, c2, b1, b2;
|
|
183
|
2955
|
|
70
|
2956 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2957 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2958 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
|
2959 EQ (charset, Vcharset_chinese_big5_2))
|
|
|
2960 {
|
|
|
2961 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
|
2962 b1, b2);
|
|
|
2963 return Fcons (make_int (b1), make_int (b2));
|
|
|
2964 }
|
|
|
2965 else
|
|
|
2966 return Qnil;
|
|
|
2967 }
|
|
|
2968
|
|
|
2969
|
|
|
2970 /************************************************************************/
|
|
|
2971 /* ISO2022 methods */
|
|
|
2972 /************************************************************************/
|
|
|
2973
|
|
|
2974 /* The following note describes the coding system ISO2022 briefly.
|
|
|
2975 Since the intention of this note is to help understanding of the
|
|
|
2976 programs in this file, some parts are NOT ACCURATE or OVERLY
|
|
|
2977 SIMPLIFIED. For thorough understanding, please refer to the
|
|
|
2978 original document of ISO2022.
|
|
|
2979
|
|
|
2980 ISO2022 provides many mechanisms to encode several character sets
|
|
|
2981 in 7-bit and 8-bit environments. If one chooses 7-bit environment,
|
|
|
2982 all text is encoded by codes of less than 128. This may make the
|
|
|
2983 encoded text a little bit longer, but the text get more stability
|
|
|
2984 to pass through several gateways (some of them strip off MSB).
|
|
|
2985
|
|
|
2986 There are two kind of character sets: control character set and
|
|
|
2987 graphic character set. The former contains control characters such
|
|
|
2988 as `newline' and `escape' to provide control functions (control
|
|
|
2989 functions are provided also by escape sequence). The latter
|
|
|
2990 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
|
2991 two control character sets and many graphic character sets.
|
|
|
2992
|
|
|
2993 Graphic character sets are classified into one of four types,
|
|
|
2994 according to the dimension and number of characters in the set:
|
|
|
2995 TYPE94, TYPE96, TYPE94x94, and TYPE96x96. In addition, each
|
|
|
2996 character set is assigned an identification byte, unique for each
|
|
|
2997 type, called "final character" (denoted as <F> hereafter). The <F>
|
|
|
2998 of each character set is decided by ECMA(*) when it is registered
|
|
|
2999 in ISO. Code range of <F> is 0x30..0x7F (0x30..0x3F are for
|
|
|
3000 private use only).
|
|
|
3001
|
|
|
3002 Note (*): ECMA = European Computer Manufacturers Association
|
|
|
3003
|
|
|
3004 Here are examples of graphic character set [NAME(<F>)]:
|
|
|
3005 o TYPE94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
|
3006 o TYPE96 -- right-half-of-ISO8859-1('A'), ...
|
|
|
3007 o TYPE94x94 -- GB2312('A'), JISX0208('B'), ...
|
|
|
3008 o TYPE96x96 -- none for the moment
|
|
|
3009
|
|
|
3010 A code area (1byte=8bits) is divided into 4 areas, C0, GL, C1, and GR.
|
|
|
3011 C0 [0x00..0x1F] -- control character plane 0
|
|
|
3012 GL [0x20..0x7F] -- graphic character plane 0
|
|
|
3013 C1 [0x80..0x9F] -- control character plane 1
|
|
|
3014 GR [0xA0..0xFF] -- graphic character plane 1
|
|
|
3015
|
|
|
3016 A control character set is directly designated and invoked to C0 or
|
|
|
3017 C1 by an escape sequence. The most common case is that:
|
|
|
3018 - ISO646's control character set is designated/invoked to C0, and
|
|
|
3019 - ISO6429's control character set is designated/invoked to C1,
|
|
|
3020 and usually these designations/invocations are omitted in encoded
|
|
|
3021 text. In a 7-bit environment, only C0 can be used, and a control
|
|
|
3022 character for C1 is encoded by an appropriate escape sequence to
|
|
|
3023 fit into the environment. All control characters for C1 are
|
|
|
3024 defined to have corresponding escape sequences.
|
|
|
3025
|
|
|
3026 A graphic character set is at first designated to one of four
|
|
|
3027 graphic registers (G0 through G3), then these graphic registers are
|
|
|
3028 invoked to GL or GR. These designations and invocations can be
|
|
|
3029 done independently. The most common case is that G0 is invoked to
|
|
|
3030 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
|
3031 these invocations and designations are omitted in encoded text.
|
|
|
3032 In a 7-bit environment, only GL can be used.
|
|
|
3033
|
|
|
3034 When a graphic character set of TYPE94 or TYPE94x94 is invoked to
|
|
|
3035 GL, codes 0x20 and 0x7F of the GL area work as control characters
|
|
|
3036 SPACE and DEL respectively, and code 0xA0 and 0xFF of GR area
|
|
|
3037 should not be used.
|
|
|
3038
|
|
|
3039 There are two ways of invocation: locking-shift and single-shift.
|
|
|
3040 With locking-shift, the invocation lasts until the next different
|
|
|
3041 invocation, whereas with single-shift, the invocation works only
|
|
|
3042 for the following character and doesn't affect locking-shift.
|
|
|
3043 Invocations are done by the following control characters or escape
|
|
|
3044 sequences.
|
|
|
3045
|
|
|
3046 ----------------------------------------------------------------------
|
|
|
3047 abbrev function cntrl escape seq description
|
|
|
3048 ----------------------------------------------------------------------
|
|
|
3049 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
|
3050 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
|
3051 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR
|
|
|
3052 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
|
3053 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR
|
|
|
3054 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
|
|
3055 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR
|
|
|
3056 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
|
3057 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
|
3058 ----------------------------------------------------------------------
|
|
|
3059 The first four are for locking-shift. Control characters for these
|
|
|
3060 functions are defined by macros ISO_CODE_XXX in `coding.h'.
|
|
|
3061
|
|
|
3062 Designations are done by the following escape sequences.
|
|
|
3063 ----------------------------------------------------------------------
|
|
|
3064 escape sequence description
|
|
|
3065 ----------------------------------------------------------------------
|
|
|
3066 ESC '(' <F> designate TYPE94<F> to G0
|
|
|
3067 ESC ')' <F> designate TYPE94<F> to G1
|
|
|
3068 ESC '*' <F> designate TYPE94<F> to G2
|
|
|
3069 ESC '+' <F> designate TYPE94<F> to G3
|
|
|
3070 ESC ',' <F> designate TYPE96<F> to G0 (*)
|
|
|
3071 ESC '-' <F> designate TYPE96<F> to G1
|
|
|
3072 ESC '.' <F> designate TYPE96<F> to G2
|
|
|
3073 ESC '/' <F> designate TYPE96<F> to G3
|
|
|
3074 ESC '$' '(' <F> designate TYPE94x94<F> to G0 (**)
|
|
|
3075 ESC '$' ')' <F> designate TYPE94x94<F> to G1
|
|
|
3076 ESC '$' '*' <F> designate TYPE94x94<F> to G2
|
|
|
3077 ESC '$' '+' <F> designate TYPE94x94<F> to G3
|
|
|
3078 ESC '$' ',' <F> designate TYPE96x96<F> to G0 (*)
|
|
|
3079 ESC '$' '-' <F> designate TYPE96x96<F> to G1
|
|
|
3080 ESC '$' '.' <F> designate TYPE96x96<F> to G2
|
|
|
3081 ESC '$' '/' <F> designate TYPE96x96<F> to G3
|
|
|
3082 ----------------------------------------------------------------------
|
|
|
3083 In this list, "TYPE94<F>" means a graphic character set of type TYPE94
|
|
|
3084 and final character <F>, and etc.
|
|
|
3085
|
|
|
3086 Note (*): Although these designations are not allowed in ISO2022,
|
|
|
3087 Emacs accepts them on decoding, and produces them on encoding
|
|
|
3088 TYPE96 or TYPE96x96 character set in a coding system which is
|
|
|
3089 characterized as 7-bit environment, non-locking-shift, and
|
|
|
3090 non-single-shift.
|
|
|
3091
|
|
|
3092 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
|
|
3093 '(' can be omitted. We call this as "short-form" here after.
|
|
|
3094
|
|
|
3095 Now you may notice that there are a lot of ways for encoding the
|
|
|
3096 same multilingual text in ISO2022. Actually, there exist many
|
|
|
3097 coding systems such as Compound Text (used in X's inter client
|
|
|
3098 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
|
3099 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
|
3100 localized platforms), and all of these are variants of ISO2022.
|
|
|
3101
|
|
|
3102 In addition to the above, Emacs handles two more kinds of escape
|
|
|
3103 sequences: ISO6429's direction specification and Emacs' private
|
|
|
3104 sequence for specifying character composition.
|
|
|
3105
|
|
|
3106 ISO6429's direction specification takes the following format:
|
|
|
3107 o CSI ']' -- end of the current direction
|
|
|
3108 o CSI '0' ']' -- end of the current direction
|
|
|
3109 o CSI '1' ']' -- start of left-to-right text
|
|
|
3110 o CSI '2' ']' -- start of right-to-left text
|
|
|
3111 The control character CSI (0x9B: control sequence introducer) is
|
|
|
3112 abbreviated to the escape sequence ESC '[' in 7-bit environment.
|
|
183
|
3113
|
|
70
|
3114 Character composition specification takes the following format:
|
|
|
3115 o ESC '0' -- start character composition
|
|
|
3116 o ESC '1' -- end character composition
|
|
|
3117 Since these are not standard escape sequences of any ISO, the use
|
|
|
3118 of them for these meanings is restricted to Emacs only. */
|
|
|
3119
|
|
|
3120 static void
|
|
|
3121 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
|
3122 {
|
|
|
3123 int i;
|
|
183
|
3124
|
|
70
|
3125 for (i = 0; i < 4; i++)
|
|
|
3126 {
|
|
|
3127 if (!NILP (coding_system))
|
|
|
3128 iso->charset[i] =
|
|
|
3129 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
|
3130 else
|
|
|
3131 iso->charset[i] = Qt;
|
|
|
3132 iso->invalid_designated[i] = 0;
|
|
|
3133 }
|
|
|
3134 iso->esc = ISO_ESC_NOTHING;
|
|
|
3135 iso->esc_bytes_index = 0;
|
|
|
3136 iso->register_left = 0;
|
|
|
3137 iso->register_right = 1;
|
|
|
3138 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3139 iso->invalid_switch_dir = 0;
|
|
|
3140 iso->output_direction_sequence = 0;
|
|
|
3141 iso->output_literally = 0;
|
|
|
3142 if (iso->composite_chars)
|
|
|
3143 Dynarr_reset (iso->composite_chars);
|
|
|
3144 }
|
|
|
3145
|
|
|
3146 static int
|
|
|
3147 fit_to_be_escape_quoted (unsigned char c)
|
|
|
3148 {
|
|
|
3149 switch (c)
|
|
|
3150 {
|
|
|
3151 case ISO_CODE_ESC:
|
|
|
3152 case ISO_CODE_CSI:
|
|
|
3153 case ISO_CODE_SS2:
|
|
|
3154 case ISO_CODE_SS3:
|
|
|
3155 case ISO_CODE_SO:
|
|
|
3156 case ISO_CODE_SI:
|
|
|
3157 return 1;
|
|
|
3158
|
|
|
3159 default:
|
|
|
3160 return 0;
|
|
|
3161 }
|
|
|
3162 }
|
|
|
3163
|
|
|
3164 /* Parse one byte of an ISO2022 escape sequence.
|
|
|
3165 If the result is an invalid escape sequence, return 0 and
|
|
|
3166 do not change anything in STR. Otherwise, if the result is
|
|
|
3167 an incomplete escape sequence, update ISO2022.ESC and
|
|
|
3168 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
|
3169 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
|
3170 return 1.
|
|
|
3171
|
|
|
3172 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
|
3173 or invocation of an invalid character set and treat that as
|
|
|
3174 an unrecognized escape sequence. */
|
|
|
3175
|
|
|
3176 static int
|
|
|
3177 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
|
3178 unsigned char c, unsigned int *flags,
|
|
|
3179 int check_invalid_charsets)
|
|
|
3180 {
|
|
|
3181 /* (1) If we're at the end of a designation sequence, CS is the
|
|
|
3182 charset being designated and REG is the register to designate
|
|
|
3183 it to.
|
|
|
3184
|
|
|
3185 (2) If we're at the end of a locking-shift sequence, REG is
|
|
|
3186 the register to invoke and HALF (0 == left, 1 == right) is
|
|
|
3187 the half to invoke it into.
|
|
|
3188
|
|
|
3189 (3) If we're at the end of a single-shift sequence, REG is
|
|
|
3190 the register to invoke. */
|
|
|
3191 Lisp_Object cs = Qnil;
|
|
|
3192 int reg, half;
|
|
|
3193
|
|
|
3194 /* NOTE: This code does goto's all over the fucking place.
|
|
|
3195 The reason for this is that we're basically implementing
|
|
|
3196 a state machine here, and hierarchical languages like C
|
|
|
3197 don't really provide a clean way of doing this. */
|
|
|
3198
|
|
|
3199 if (! (*flags & CODING_STATE_ESCAPE))
|
|
|
3200 /* At beginning of escape sequence; we need to reset our
|
|
|
3201 escape-state variables. */
|
|
|
3202 iso->esc = ISO_ESC_NOTHING;
|
|
|
3203
|
|
|
3204 iso->output_literally = 0;
|
|
|
3205 iso->output_direction_sequence = 0;
|
|
|
3206
|
|
|
3207 switch (iso->esc)
|
|
|
3208 {
|
|
|
3209 case ISO_ESC_NOTHING:
|
|
|
3210 iso->esc_bytes_index = 0;
|
|
|
3211 switch (c)
|
|
|
3212 {
|
|
|
3213 case ISO_CODE_ESC: /* Start escape sequence */
|
|
|
3214 *flags |= CODING_STATE_ESCAPE;
|
|
|
3215 iso->esc = ISO_ESC;
|
|
|
3216 goto not_done;
|
|
183
|
3217
|
|
70
|
3218 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
|
3219 *flags |= CODING_STATE_ESCAPE;
|
|
|
3220 iso->esc = ISO_ESC_5_11;
|
|
|
3221 goto not_done;
|
|
|
3222
|
|
|
3223 case ISO_CODE_SO: /* locking shift 1 */
|
|
|
3224 reg = 1; half = 0;
|
|
|
3225 goto locking_shift;
|
|
|
3226 case ISO_CODE_SI: /* locking shift 0 */
|
|
|
3227 reg = 0; half = 0;
|
|
|
3228 goto locking_shift;
|
|
|
3229
|
|
|
3230 case ISO_CODE_SS2: /* single shift */
|
|
|
3231 reg = 2;
|
|
|
3232 goto single_shift;
|
|
|
3233 case ISO_CODE_SS3: /* single shift */
|
|
|
3234 reg = 3;
|
|
|
3235 goto single_shift;
|
|
|
3236
|
|
|
3237 default: /* Other control characters */
|
|
|
3238 return 0;
|
|
|
3239 }
|
|
|
3240
|
|
|
3241 case ISO_ESC:
|
|
|
3242 switch (c)
|
|
|
3243 {
|
|
|
3244 /**** single shift ****/
|
|
|
3245
|
|
|
3246 case 'N': /* single shift 2 */
|
|
|
3247 reg = 2;
|
|
|
3248 goto single_shift;
|
|
|
3249 case 'O': /* single shift 3 */
|
|
|
3250 reg = 3;
|
|
|
3251 goto single_shift;
|
|
|
3252
|
|
|
3253 /**** locking shift ****/
|
|
|
3254
|
|
|
3255 case '~': /* locking shift 1 right */
|
|
|
3256 reg = 1; half = 1;
|
|
|
3257 goto locking_shift;
|
|
|
3258 case 'n': /* locking shift 2 */
|
|
|
3259 reg = 2; half = 0;
|
|
|
3260 goto locking_shift;
|
|
|
3261 case '}': /* locking shift 2 right */
|
|
|
3262 reg = 2; half = 1;
|
|
|
3263 goto locking_shift;
|
|
|
3264 case 'o': /* locking shift 3 */
|
|
|
3265 reg = 3; half = 0;
|
|
|
3266 goto locking_shift;
|
|
|
3267 case '|': /* locking shift 3 right */
|
|
|
3268 reg = 3; half = 1;
|
|
|
3269 goto locking_shift;
|
|
|
3270
|
|
|
3271 /**** composite ****/
|
|
|
3272
|
|
|
3273 case '0':
|
|
|
3274 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
|
3275 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
|
3276 CODING_STATE_COMPOSITE;
|
|
|
3277 return 1;
|
|
183
|
3278
|
|
70
|
3279 case '1':
|
|
|
3280 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
|
3281 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
|
3282 ~CODING_STATE_COMPOSITE;
|
|
|
3283 return 1;
|
|
|
3284
|
|
|
3285 /**** directionality ****/
|
|
|
3286
|
|
|
3287 case '[':
|
|
|
3288 iso->esc = ISO_ESC_5_11;
|
|
|
3289 goto not_done;
|
|
|
3290
|
|
|
3291 /**** designation ****/
|
|
|
3292
|
|
|
3293 case '$': /* multibyte charset prefix */
|
|
|
3294 iso->esc = ISO_ESC_2_4;
|
|
|
3295 goto not_done;
|
|
|
3296
|
|
|
3297 default:
|
|
|
3298 if (0x28 <= c && c <= 0x2F)
|
|
|
3299 {
|
|
179
|
3300 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
|
|
70
|
3301 goto not_done;
|
|
|
3302 }
|
|
|
3303
|
|
|
3304 /* This function is called with CODESYS equal to nil when
|
|
|
3305 doing coding-system detection. */
|
|
|
3306 if (!NILP (codesys)
|
|
|
3307 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
3308 && fit_to_be_escape_quoted (c))
|
|
|
3309 {
|
|
|
3310 iso->esc = ISO_ESC_LITERAL;
|
|
|
3311 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3312 return 1;
|
|
|
3313 }
|
|
|
3314
|
|
|
3315 /* bzzzt! */
|
|
|
3316 return 0;
|
|
|
3317 }
|
|
|
3318
|
|
|
3319
|
|
|
3320
|
|
|
3321 /**** directionality ****/
|
|
|
3322
|
|
|
3323 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
|
3324 if (c == ']')
|
|
|
3325 {
|
|
|
3326 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3327 goto directionality;
|
|
|
3328 }
|
|
|
3329 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
|
3330 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
|
3331 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
|
3332 else return 0;
|
|
|
3333 goto not_done;
|
|
|
3334
|
|
|
3335 case ISO_ESC_5_11_0:
|
|
|
3336 if (c == ']')
|
|
|
3337 {
|
|
|
3338 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3339 goto directionality;
|
|
|
3340 }
|
|
|
3341 return 0;
|
|
|
3342
|
|
|
3343 case ISO_ESC_5_11_1:
|
|
|
3344 if (c == ']')
|
|
|
3345 {
|
|
|
3346 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3347 goto directionality;
|
|
|
3348 }
|
|
|
3349 return 0;
|
|
|
3350
|
|
|
3351 case ISO_ESC_5_11_2:
|
|
|
3352 if (c == ']')
|
|
|
3353 {
|
|
|
3354 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
|
3355 goto directionality;
|
|
|
3356 }
|
|
|
3357 return 0;
|
|
|
3358
|
|
|
3359 directionality:
|
|
|
3360 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
|
3361 /* Various junk here to attempt to preserve the direction sequences
|
|
|
3362 literally in the text if they would otherwise be swallowed due
|
|
|
3363 to invalid designations that don't show up as actual charset
|
|
|
3364 changes in the text. */
|
|
|
3365 if (iso->invalid_switch_dir)
|
|
|
3366 {
|
|
|
3367 /* We already inserted a direction switch literally into the
|
|
|
3368 text. We assume (#### this may not be right) that the
|
|
|
3369 next direction switch is the one going the other way,
|
|
|
3370 and we need to output that literally as well. */
|
|
|
3371 iso->output_literally = 1;
|
|
|
3372 iso->invalid_switch_dir = 0;
|
|
|
3373 }
|
|
|
3374 else
|
|
|
3375 {
|
|
|
3376 int jj;
|
|
|
3377
|
|
74
|
3378 /* If we are in the thrall of an invalid designation,
|
|
70
|
3379 then stick the directionality sequence literally into the
|
|
|
3380 output stream so it ends up in the original text again. */
|
|
|
3381 for (jj = 0; jj < 4; jj++)
|
|
|
3382 if (iso->invalid_designated[jj])
|
|
|
3383 break;
|
|
|
3384 if (jj < 4)
|
|
|
3385 {
|
|
|
3386 iso->output_literally = 1;
|
|
|
3387 iso->invalid_switch_dir = 1;
|
|
|
3388 }
|
|
|
3389 else
|
|
|
3390 /* Indicate that we haven't yet seen a valid designation,
|
|
|
3391 so that if a switch-dir is directly followed by an
|
|
|
3392 invalid designation, both get inserted literally. */
|
|
|
3393 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
|
3394 }
|
|
|
3395 return 1;
|
|
|
3396
|
|
|
3397
|
|
|
3398 /**** designation ****/
|
|
|
3399
|
|
|
3400 case ISO_ESC_2_4:
|
|
|
3401 if (0x28 <= c && c <= 0x2F)
|
|
|
3402 {
|
|
179
|
3403 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
|
|
70
|
3404 goto not_done;
|
|
|
3405 }
|
|
|
3406 if (0x40 <= c && c <= 0x42)
|
|
|
3407 {
|
|
|
3408 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
|
3409 *flags & CODING_STATE_R2L ?
|
|
|
3410 CHARSET_RIGHT_TO_LEFT :
|
|
|
3411 CHARSET_LEFT_TO_RIGHT);
|
|
|
3412 reg = 0;
|
|
|
3413 goto designated;
|
|
|
3414 }
|
|
|
3415 return 0;
|
|
|
3416
|
|
|
3417 default:
|
|
|
3418 {
|
|
179
|
3419 int type =-1;
|
|
70
|
3420
|
|
|
3421 if (c < '0' || c > '~')
|
|
|
3422 return 0; /* bad final byte */
|
|
|
3423
|
|
|
3424 if (iso->esc >= ISO_ESC_2_8 &&
|
|
|
3425 iso->esc <= ISO_ESC_2_15)
|
|
|
3426 {
|
|
173
|
3427 type = ((iso->esc >= ISO_ESC_2_12) ?
|
|
|
3428 CHARSET_TYPE_96 : CHARSET_TYPE_94);
|
|
70
|
3429 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
|
3430 }
|
|
|
3431 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
|
3432 iso->esc <= ISO_ESC_2_4_15)
|
|
|
3433 {
|
|
173
|
3434 type = ((iso->esc >= ISO_ESC_2_4_12) ?
|
|
|
3435 CHARSET_TYPE_96X96 : CHARSET_TYPE_94X94);
|
|
70
|
3436 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
|
3437 }
|
|
179
|
3438 else
|
|
|
3439 {
|
|
|
3440 /* Can this ever be reached? -slb */
|
|
|
3441 abort();
|
|
|
3442 }
|
|
183
|
3443
|
|
70
|
3444 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
|
3445 *flags & CODING_STATE_R2L ?
|
|
|
3446 CHARSET_RIGHT_TO_LEFT :
|
|
|
3447 CHARSET_LEFT_TO_RIGHT);
|
|
|
3448 goto designated;
|
|
|
3449 }
|
|
|
3450 }
|
|
|
3451
|
|
|
3452 not_done:
|
|
|
3453 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
|
3454 return -1;
|
|
|
3455
|
|
|
3456 single_shift:
|
|
|
3457 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
|
3458 /* can't invoke something that ain't there. */
|
|
|
3459 return 0;
|
|
|
3460 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
|
3461 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3462 if (reg == 2)
|
|
|
3463 *flags |= CODING_STATE_SS2;
|
|
|
3464 else
|
|
|
3465 *flags |= CODING_STATE_SS3;
|
|
|
3466 return 1;
|
|
|
3467
|
|
|
3468 locking_shift:
|
|
|
3469 if (check_invalid_charsets &&
|
|
|
3470 !CHARSETP (iso->charset[reg]))
|
|
|
3471 /* can't invoke something that ain't there. */
|
|
|
3472 return 0;
|
|
|
3473 if (half)
|
|
|
3474 iso->register_right = reg;
|
|
|
3475 else
|
|
|
3476 iso->register_left = reg;
|
|
|
3477 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3478 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
|
3479 return 1;
|
|
|
3480
|
|
|
3481 designated:
|
|
|
3482 if (NILP (cs) && check_invalid_charsets)
|
|
|
3483 {
|
|
|
3484 iso->invalid_designated[reg] = 1;
|
|
|
3485 iso->charset[reg] = Vcharset_ascii;
|
|
|
3486 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
3487 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3488 iso->output_literally = 1;
|
|
|
3489 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
3490 {
|
|
|
3491 /* We encountered a switch-direction followed by an
|
|
|
3492 invalid designation. Ensure that the switch-direction
|
|
|
3493 gets outputted; otherwise it will probably get eaten
|
|
|
3494 when the text is written out again. */
|
|
|
3495 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3496 iso->output_direction_sequence = 1;
|
|
|
3497 /* And make sure that the switch-dir going the other
|
|
|
3498 way gets outputted, as well. */
|
|
|
3499 iso->invalid_switch_dir = 1;
|
|
|
3500 }
|
|
|
3501 return 1;
|
|
|
3502 }
|
|
|
3503 /* This function is called with CODESYS equal to nil when
|
|
|
3504 doing coding-system detection. */
|
|
|
3505 if (!NILP (codesys))
|
|
|
3506 {
|
|
|
3507 charset_conversion_spec_dynarr *dyn =
|
|
|
3508 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
|
3509
|
|
|
3510 if (dyn)
|
|
|
3511 {
|
|
|
3512 int i;
|
|
|
3513
|
|
|
3514 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
3515 {
|
|
|
3516 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
3517 if (EQ (cs, spec->from_charset))
|
|
|
3518 cs = spec->to_charset;
|
|
|
3519 }
|
|
|
3520 }
|
|
|
3521 }
|
|
|
3522
|
|
|
3523 iso->charset[reg] = cs;
|
|
|
3524 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
3525 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3526 if (iso->invalid_designated[reg])
|
|
|
3527 {
|
|
|
3528 iso->invalid_designated[reg] = 0;
|
|
|
3529 iso->output_literally = 1;
|
|
|
3530 }
|
|
|
3531 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
3532 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3533 return 1;
|
|
|
3534 }
|
|
|
3535
|
|
|
3536 static int
|
|
74
|
3537 detect_coding_iso2022 (struct detection_state *st, CONST unsigned char *src,
|
|
70
|
3538 unsigned int n)
|
|
|
3539 {
|
|
|
3540 int c;
|
|
|
3541 int mask;
|
|
|
3542
|
|
|
3543 /* #### There are serious deficiencies in the recognition mechanism
|
|
|
3544 here. This needs to be much smarter if it's going to cut it. */
|
|
|
3545
|
|
|
3546 if (!st->iso2022.initted)
|
|
|
3547 {
|
|
|
3548 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
|
3549 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
|
3550 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
3551 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
3552 CODING_CATEGORY_ISO_8_2_MASK |
|
|
|
3553 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
|
3554 st->iso2022.flags = 0;
|
|
|
3555 st->iso2022.high_byte_count = 0;
|
|
|
3556 st->iso2022.saw_single_shift = 0;
|
|
|
3557 st->iso2022.initted = 1;
|
|
|
3558 }
|
|
|
3559
|
|
|
3560 mask = st->iso2022.mask;
|
|
|
3561
|
|
|
3562 while (n--)
|
|
|
3563 {
|
|
|
3564 c = *src++;
|
|
|
3565 if (c >= 0xA0)
|
|
|
3566 {
|
|
|
3567 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
3568 st->iso2022.high_byte_count++;
|
|
|
3569 }
|
|
|
3570 else
|
|
|
3571 {
|
|
|
3572 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
|
3573 {
|
|
|
3574 if (st->iso2022.high_byte_count & 1)
|
|
|
3575 /* odd number of high bytes; assume not iso-8-2 */
|
|
|
3576 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
3577 }
|
|
|
3578 st->iso2022.high_byte_count = 0;
|
|
|
3579 st->iso2022.saw_single_shift = 0;
|
|
|
3580 if (c > 0x80)
|
|
|
3581 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
3582 }
|
|
|
3583 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
|
3584 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
|
3585 { /* control chars */
|
|
|
3586 switch (c)
|
|
|
3587 {
|
|
|
3588 /* Allow and ignore control characters that you might
|
|
|
3589 reasonably see in a text file */
|
|
|
3590 case '\r':
|
|
|
3591 case '\n':
|
|
|
3592 case '\t':
|
|
|
3593 case 7: /* bell */
|
|
|
3594 case 8: /* backspace */
|
|
|
3595 case 11: /* vertical tab */
|
|
|
3596 case 12: /* form feed */
|
|
|
3597 case 26: /* MS-DOS C-z junk */
|
|
207
|
3598 case 31: /* '^_' -- for info */
|
|
70
|
3599 goto label_continue_loop;
|
|
|
3600
|
|
|
3601 default:
|
|
|
3602 break;
|
|
|
3603 }
|
|
|
3604 }
|
|
|
3605
|
|
|
3606 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
|
3607 || BYTE_C1_P (c))
|
|
|
3608 {
|
|
|
3609 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
|
3610 &st->iso2022.flags, 0))
|
|
|
3611 {
|
|
|
3612 switch (st->iso2022.iso.esc)
|
|
|
3613 {
|
|
|
3614 case ISO_ESC_DESIGNATE:
|
|
|
3615 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
|
3616 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
3617 break;
|
|
|
3618 case ISO_ESC_LOCKING_SHIFT:
|
|
|
3619 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
|
3620 goto ran_out_of_chars;
|
|
|
3621 case ISO_ESC_SINGLE_SHIFT:
|
|
|
3622 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
|
3623 st->iso2022.saw_single_shift = 1;
|
|
|
3624 break;
|
|
|
3625 default:
|
|
|
3626 break;
|
|
|
3627 }
|
|
|
3628 }
|
|
|
3629 else
|
|
|
3630 {
|
|
|
3631 mask = 0;
|
|
|
3632 goto ran_out_of_chars;
|
|
|
3633 }
|
|
|
3634 }
|
|
|
3635 label_continue_loop:;
|
|
|
3636 }
|
|
|
3637
|
|
|
3638 ran_out_of_chars:
|
|
|
3639
|
|
|
3640 return mask;
|
|
|
3641 }
|
|
|
3642
|
|
|
3643 static int
|
|
|
3644 postprocess_iso2022_mask (int mask)
|
|
|
3645 {
|
|
|
3646 /* #### kind of cheesy */
|
|
|
3647 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
|
3648 entirely seven-bit and turn off the eight-bit ones. */
|
|
|
3649 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
|
3650 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
3651 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
3652 CODING_CATEGORY_ISO_8_2_MASK);
|
|
|
3653 return mask;
|
|
|
3654 }
|
|
|
3655
|
|
|
3656 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
|
3657 output a switch-dir-to-left-to-right sequence to DST.
|
|
|
3658 Also update FLAGS if it is not a null pointer.
|
|
|
3659 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
3660 need to handle the CSI differently. */
|
|
|
3661
|
|
|
3662 static void
|
|
|
3663 restore_left_to_right_direction (struct Lisp_Coding_System *codesys,
|
|
|
3664 unsigned_char_dynarr *dst,
|
|
|
3665 unsigned int *flags,
|
|
|
3666 int internal_p)
|
|
|
3667 {
|
|
|
3668 if (!flags || (*flags & CODING_STATE_R2L))
|
|
|
3669 {
|
|
|
3670 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
3671 {
|
|
|
3672 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
3673 Dynarr_add (dst, '[');
|
|
|
3674 }
|
|
|
3675 else if (internal_p)
|
|
|
3676 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
3677 else
|
|
|
3678 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
3679 Dynarr_add (dst, '0');
|
|
|
3680 Dynarr_add (dst, ']');
|
|
|
3681 if (flags)
|
|
|
3682 *flags &= ~CODING_STATE_R2L;
|
|
|
3683 }
|
|
|
3684 }
|
|
|
3685
|
|
|
3686 /* If FLAGS is a null pointer or specifies a direction different from
|
|
|
3687 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
|
3688 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
|
3689 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
|
3690 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
3691 need to handle the CSI differently. */
|
|
|
3692
|
|
|
3693 static void
|
|
|
3694 ensure_correct_direction (int direction, struct Lisp_Coding_System *codesys,
|
|
|
3695 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
|
3696 int internal_p)
|
|
|
3697 {
|
|
|
3698 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
|
3699 direction == CHARSET_LEFT_TO_RIGHT)
|
|
|
3700 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
|
3701 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
|
3702 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
|
3703 direction == CHARSET_RIGHT_TO_LEFT)
|
|
|
3704 {
|
|
|
3705 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
3706 {
|
|
|
3707 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
3708 Dynarr_add (dst, '[');
|
|
|
3709 }
|
|
|
3710 else if (internal_p)
|
|
|
3711 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
3712 else
|
|
|
3713 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
3714 Dynarr_add (dst, '2');
|
|
|
3715 Dynarr_add (dst, ']');
|
|
|
3716 if (flags)
|
|
|
3717 *flags |= CODING_STATE_R2L;
|
|
|
3718 }
|
|
|
3719 }
|
|
|
3720
|
|
|
3721 /* Convert ISO2022-format data to internal format. */
|
|
|
3722
|
|
|
3723 static void
|
|
|
3724 decode_coding_iso2022 (Lstream *decoding, CONST unsigned char *src,
|
|
|
3725 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3726 {
|
|
|
3727 unsigned char c;
|
|
|
3728 unsigned int flags, ch;
|
|
181
|
3729 enum eol_type eol_type;
|
|
70
|
3730 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
272
|
3731 Lisp_Object coding_system;
|
|
70
|
3732 unsigned_char_dynarr *real_dst = dst;
|
|
|
3733
|
|
|
3734 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
3735 eol_type = str->eol_type;
|
|
70
|
3736 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
3737
|
|
|
3738 if (flags & CODING_STATE_COMPOSITE)
|
|
|
3739 dst = str->iso2022.composite_chars;
|
|
|
3740
|
|
|
3741 while (n--)
|
|
|
3742 {
|
|
|
3743 c = *src++;
|
|
|
3744 if (flags & CODING_STATE_ESCAPE)
|
|
|
3745 { /* Within ESC sequence */
|
|
181
|
3746 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
|
3747 c, &flags, 1);
|
|
70
|
3748
|
|
|
3749 if (retval)
|
|
|
3750 {
|
|
|
3751 switch (str->iso2022.esc)
|
|
|
3752 {
|
|
|
3753 case ISO_ESC_START_COMPOSITE:
|
|
|
3754 if (str->iso2022.composite_chars)
|
|
|
3755 Dynarr_reset (str->iso2022.composite_chars);
|
|
|
3756 else
|
|
185
|
3757 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
|
|
70
|
3758 dst = str->iso2022.composite_chars;
|
|
|
3759 break;
|
|
|
3760 case ISO_ESC_END_COMPOSITE:
|
|
|
3761 {
|
|
|
3762 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
|
3763 Bytecount len;
|
|
|
3764 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
|
3765 Dynarr_length (dst));
|
|
|
3766 dst = real_dst;
|
|
|
3767 len = set_charptr_emchar (comstr, emch);
|
|
|
3768 Dynarr_add_many (dst, comstr, len);
|
|
|
3769 break;
|
|
|
3770 }
|
|
183
|
3771
|
|
70
|
3772 case ISO_ESC_LITERAL:
|
|
|
3773 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3774 break;
|
|
|
3775
|
|
|
3776 default:
|
|
|
3777 /* Everything else handled already */
|
|
|
3778 break;
|
|
|
3779 }
|
|
|
3780 }
|
|
|
3781
|
|
|
3782 /* Attempted error recovery. */
|
|
|
3783 if (str->iso2022.output_direction_sequence)
|
|
|
3784 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
|
3785 CHARSET_RIGHT_TO_LEFT :
|
|
|
3786 CHARSET_LEFT_TO_RIGHT,
|
|
|
3787 str->codesys, dst, 0, 1);
|
|
|
3788 /* More error recovery. */
|
|
|
3789 if (!retval || str->iso2022.output_literally)
|
|
|
3790 {
|
|
|
3791 /* Output the (possibly invalid) sequence */
|
|
|
3792 int i;
|
|
|
3793 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
|
3794 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
|
3795 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3796 if (!retval)
|
|
|
3797 n++, src--;/* Repeat the loop with the same character. */
|
|
|
3798 else
|
|
|
3799 {
|
|
|
3800 /* No sense in reprocessing the final byte of the
|
|
|
3801 escape sequence; it could mess things up anyway.
|
|
|
3802 Just add it now. */
|
|
|
3803 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3804 }
|
|
|
3805 }
|
|
|
3806 ch = 0;
|
|
|
3807 }
|
|
|
3808 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
|
3809 { /* Control characters */
|
|
|
3810
|
|
|
3811 /***** Error-handling *****/
|
|
|
3812
|
|
|
3813 /* If we were in the middle of a character, dump out the
|
|
|
3814 partial character. */
|
|
|
3815 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3816
|
|
|
3817 /* If we just saw a single-shift character, dump it out.
|
|
|
3818 This may dump out the wrong sort of single-shift character,
|
|
|
3819 but least it will give an indication that something went
|
|
|
3820 wrong. */
|
|
|
3821 if (flags & CODING_STATE_SS2)
|
|
|
3822 {
|
|
|
3823 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
|
3824 flags &= ~CODING_STATE_SS2;
|
|
|
3825 }
|
|
|
3826 if (flags & CODING_STATE_SS3)
|
|
|
3827 {
|
|
|
3828 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
|
3829 flags &= ~CODING_STATE_SS3;
|
|
|
3830 }
|
|
|
3831
|
|
|
3832 /***** Now handle the control characters. *****/
|
|
|
3833
|
|
|
3834 /* Handle CR/LF */
|
|
181
|
3835 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
3836
|
|
|
3837 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3838
|
|
|
3839 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
|
3840 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3841 }
|
|
|
3842 else
|
|
|
3843 { /* Graphic characters */
|
|
|
3844 Lisp_Object charset;
|
|
|
3845 int lb;
|
|
|
3846 int reg;
|
|
|
3847
|
|
181
|
3848 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
3849
|
|
|
3850 /* Now determine the charset. */
|
|
|
3851 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
|
3852 : (flags & CODING_STATE_SS3) ? 3
|
|
|
3853 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
|
3854 : str->iso2022.register_left);
|
|
|
3855 charset = str->iso2022.charset[reg];
|
|
|
3856
|
|
|
3857 /* Error checking: */
|
|
367
|
3858 if (! CHARSETP (charset)
|
|
|
3859 || str->iso2022.invalid_designated[reg]
|
|
70
|
3860 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
|
3861 && XCHARSET_CHARS (charset) == 94))
|
|
|
3862 /* Mrmph. We are trying to invoke a register that has no
|
|
|
3863 or an invalid charset in it, or trying to add a character
|
|
|
3864 outside the range of the charset. Insert that char literally
|
|
|
3865 to preserve it for the output. */
|
|
|
3866 {
|
|
|
3867 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3868 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3869 }
|
|
|
3870
|
|
|
3871 else
|
|
|
3872 {
|
|
|
3873 /* Things are probably hunky-dorey. */
|
|
|
3874
|
|
|
3875 /* Fetch reverse charset, maybe. */
|
|
|
3876 if (((flags & CODING_STATE_R2L) &&
|
|
|
3877 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
|
3878 ||
|
|
|
3879 (!(flags & CODING_STATE_R2L) &&
|
|
|
3880 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
|
3881 {
|
|
183
|
3882 Lisp_Object new_charset =
|
|
70
|
3883 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
|
3884 if (!NILP (new_charset))
|
|
|
3885 charset = new_charset;
|
|
|
3886 }
|
|
|
3887
|
|
|
3888 lb = XCHARSET_LEADING_BYTE (charset);
|
|
|
3889 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3890 {
|
|
|
3891 case 1: /* ASCII */
|
|
|
3892 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3893 Dynarr_add (dst, c & 0x7F);
|
|
|
3894 break;
|
|
183
|
3895
|
|
70
|
3896 case 2: /* one-byte official */
|
|
|
3897 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3898 Dynarr_add (dst, lb);
|
|
|
3899 Dynarr_add (dst, c | 0x80);
|
|
|
3900 break;
|
|
183
|
3901
|
|
70
|
3902 case 3: /* one-byte private or two-byte official */
|
|
|
3903 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3904 {
|
|
|
3905 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3906 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
|
3907 Dynarr_add (dst, lb);
|
|
|
3908 Dynarr_add (dst, c | 0x80);
|
|
|
3909 }
|
|
|
3910 else
|
|
|
3911 {
|
|
|
3912 if (ch)
|
|
|
3913 {
|
|
|
3914 Dynarr_add (dst, lb);
|
|
|
3915 Dynarr_add (dst, ch | 0x80);
|
|
|
3916 Dynarr_add (dst, c | 0x80);
|
|
|
3917 ch = 0;
|
|
|
3918 }
|
|
|
3919 else
|
|
|
3920 ch = c;
|
|
|
3921 }
|
|
|
3922 break;
|
|
183
|
3923
|
|
70
|
3924 default: /* two-byte private */
|
|
|
3925 if (ch)
|
|
|
3926 {
|
|
|
3927 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
|
3928 Dynarr_add (dst, lb);
|
|
|
3929 Dynarr_add (dst, ch | 0x80);
|
|
|
3930 Dynarr_add (dst, c | 0x80);
|
|
|
3931 ch = 0;
|
|
|
3932 }
|
|
|
3933 else
|
|
|
3934 ch = c;
|
|
|
3935 }
|
|
|
3936 }
|
|
|
3937
|
|
|
3938 if (!ch)
|
|
|
3939 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3940 }
|
|
|
3941
|
|
|
3942 label_continue_loop:;
|
|
|
3943 }
|
|
|
3944
|
|
|
3945 if (flags & CODING_STATE_END)
|
|
|
3946 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3947
|
|
|
3948 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
3949 }
|
|
|
3950
|
|
|
3951
|
|
|
3952 /***** ISO2022 encoder *****/
|
|
|
3953
|
|
|
3954 /* Designate CHARSET into register REG. */
|
|
|
3955
|
|
|
3956 static void
|
|
|
3957 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
|
3958 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
3959 {
|
|
|
3960 CONST char *inter94 = "()*+", *inter96= ",-./";
|
|
272
|
3961 unsigned int type;
|
|
70
|
3962 unsigned char final;
|
|
|
3963 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
|
3964
|
|
|
3965 str->iso2022.charset[reg] = charset;
|
|
|
3966 if (!CHARSETP (charset))
|
|
|
3967 /* charset might be an initial nil or t. */
|
|
|
3968 return;
|
|
|
3969 type = XCHARSET_TYPE (charset);
|
|
|
3970 final = XCHARSET_FINAL (charset);
|
|
|
3971 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
|
3972 CHARSETP (old_charset) &&
|
|
|
3973 XCHARSET_TYPE (old_charset) == type &&
|
|
|
3974 XCHARSET_FINAL (old_charset) == final)
|
|
|
3975 return;
|
|
|
3976
|
|
|
3977 str->iso2022.force_charset_on_output[reg] = 0;
|
|
|
3978
|
|
|
3979 {
|
|
|
3980 charset_conversion_spec_dynarr *dyn =
|
|
|
3981 str->codesys->iso2022.output_conv;
|
|
|
3982
|
|
|
3983 if (dyn)
|
|
|
3984 {
|
|
|
3985 int i;
|
|
183
|
3986
|
|
70
|
3987 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
3988 {
|
|
|
3989 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
3990 if (EQ (charset, spec->from_charset))
|
|
|
3991 charset = spec->to_charset;
|
|
|
3992 }
|
|
|
3993 }
|
|
|
3994 }
|
|
|
3995
|
|
|
3996 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
3997 switch (type)
|
|
|
3998 {
|
|
|
3999 case CHARSET_TYPE_94:
|
|
|
4000 Dynarr_add (dst, inter94[reg]);
|
|
|
4001 break;
|
|
|
4002 case CHARSET_TYPE_96:
|
|
|
4003 Dynarr_add (dst, inter96[reg]);
|
|
|
4004 break;
|
|
|
4005 case CHARSET_TYPE_94X94:
|
|
|
4006 Dynarr_add (dst, '$');
|
|
|
4007 if (reg != 0
|
|
|
4008 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
|
4009 || final < '@'
|
|
|
4010 || final > 'B')
|
|
|
4011 Dynarr_add (dst, inter94[reg]);
|
|
|
4012 break;
|
|
|
4013 case CHARSET_TYPE_96X96:
|
|
|
4014 Dynarr_add (dst, '$');
|
|
|
4015 Dynarr_add (dst, inter96[reg]);
|
|
|
4016 break;
|
|
|
4017 }
|
|
|
4018 Dynarr_add (dst, final);
|
|
|
4019 }
|
|
|
4020
|
|
|
4021 static void
|
|
|
4022 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4023 {
|
|
|
4024 if (str->iso2022.register_left != 0)
|
|
|
4025 {
|
|
|
4026 Dynarr_add (dst, ISO_CODE_SI);
|
|
|
4027 str->iso2022.register_left = 0;
|
|
|
4028 }
|
|
|
4029 }
|
|
|
4030
|
|
|
4031 static void
|
|
|
4032 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4033 {
|
|
|
4034 if (str->iso2022.register_left != 1)
|
|
|
4035 {
|
|
|
4036 Dynarr_add (dst, ISO_CODE_SO);
|
|
|
4037 str->iso2022.register_left = 1;
|
|
|
4038 }
|
|
|
4039 }
|
|
|
4040
|
|
|
4041 /* Convert internally-formatted data to ISO2022 format. */
|
|
|
4042
|
|
|
4043 static void
|
|
|
4044 encode_coding_iso2022 (Lstream *encoding, CONST unsigned char *src,
|
|
|
4045 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4046 {
|
|
|
4047 unsigned char charmask, c;
|
|
181
|
4048 unsigned int flags, ch;
|
|
|
4049 enum eol_type eol_type;
|
|
70
|
4050 unsigned char char_boundary;
|
|
|
4051 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
4052 struct Lisp_Coding_System *codesys = str->codesys;
|
|
|
4053 int i;
|
|
|
4054 Lisp_Object charset;
|
|
|
4055 int half;
|
|
|
4056
|
|
|
4057 /* flags for handling composite chars. We do a little switcharoo
|
|
|
4058 on the source while we're outputting the composite char. */
|
|
173
|
4059 unsigned int saved_n = 0;
|
|
|
4060 CONST unsigned char *saved_src = NULL;
|
|
70
|
4061 int in_composite = 0;
|
|
|
4062
|
|
|
4063 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
4064 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
4065 char_boundary = str->iso2022.current_char_boundary;
|
|
|
4066 charset = str->iso2022.current_charset;
|
|
|
4067 half = str->iso2022.current_half;
|
|
|
4068
|
|
|
4069 back_to_square_n:
|
|
|
4070 while (n--)
|
|
|
4071 {
|
|
|
4072 c = *src++;
|
|
|
4073
|
|
|
4074 if (BYTE_ASCII_P (c))
|
|
|
4075 { /* Processing ASCII character */
|
|
|
4076 ch = 0;
|
|
|
4077
|
|
|
4078 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4079
|
|
|
4080 /* Make sure G0 contains ASCII */
|
|
|
4081 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
|
4082 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
|
4083 {
|
|
|
4084 ensure_normal_shift (str, dst);
|
|
|
4085 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
|
4086 }
|
|
|
4087
|
|
|
4088 /* If necessary, restore everything to the default state
|
|
|
4089 at end-of-line */
|
|
|
4090 if (c == '\n' &&
|
|
|
4091 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
|
4092 {
|
|
|
4093 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4094
|
|
|
4095 ensure_normal_shift (str, dst);
|
|
|
4096
|
|
|
4097 for (i = 0; i < 4; i++)
|
|
|
4098 {
|
|
|
4099 Lisp_Object initial_charset =
|
|
|
4100 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
4101 iso2022_designate (initial_charset, i, str, dst);
|
|
|
4102 }
|
|
|
4103 }
|
|
|
4104 if (c == '\n')
|
|
|
4105 {
|
|
181
|
4106 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
4107 Dynarr_add (dst, '\r');
|
|
181
|
4108 if (eol_type != EOL_CR)
|
|
70
|
4109 Dynarr_add (dst, c);
|
|
|
4110 }
|
|
|
4111 else
|
|
|
4112 {
|
|
|
4113 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4114 && fit_to_be_escape_quoted (c))
|
|
|
4115 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4116 Dynarr_add (dst, c);
|
|
|
4117 }
|
|
|
4118 char_boundary = 1;
|
|
|
4119 }
|
|
|
4120
|
|
|
4121 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
4122 { /* Processing Leading Byte */
|
|
|
4123 ch = 0;
|
|
|
4124 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
183
|
4125 if (LEADING_BYTE_PREFIX_P(c))
|
|
70
|
4126 ch = c;
|
|
|
4127 else if (!EQ (charset, Vcharset_control_1)
|
|
|
4128 && !EQ (charset, Vcharset_composite))
|
|
|
4129 {
|
|
|
4130 int reg;
|
|
|
4131
|
|
|
4132 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
|
4133 codesys, dst, &flags, 0);
|
|
|
4134
|
|
|
4135 /* Now determine which register to use. */
|
|
|
4136 reg = -1;
|
|
|
4137 for (i = 0; i < 4; i++)
|
|
|
4138 {
|
|
|
4139 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
|
4140 EQ (charset,
|
|
|
4141 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
|
4142 {
|
|
|
4143 reg = i;
|
|
|
4144 break;
|
|
|
4145 }
|
|
|
4146 }
|
|
|
4147
|
|
|
4148 if (reg == -1)
|
|
|
4149 {
|
|
|
4150 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
|
4151 {
|
|
|
4152 if (!NILP (str->iso2022.charset[1]) &&
|
|
|
4153 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
|
4154 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
|
4155 reg = 1;
|
|
|
4156 else if (!NILP (str->iso2022.charset[2]))
|
|
|
4157 reg = 2;
|
|
|
4158 else if (!NILP (str->iso2022.charset[3]))
|
|
|
4159 reg = 3;
|
|
|
4160 else
|
|
|
4161 reg = 0;
|
|
|
4162 }
|
|
|
4163 else
|
|
|
4164 reg = 0;
|
|
|
4165 }
|
|
|
4166
|
|
|
4167 iso2022_designate (charset, reg, str, dst);
|
|
|
4168
|
|
|
4169 /* Now invoke that register. */
|
|
|
4170 switch (reg)
|
|
|
4171 {
|
|
|
4172 case 0:
|
|
|
4173 ensure_normal_shift (str, dst);
|
|
|
4174 half = 0;
|
|
|
4175 break;
|
|
|
4176
|
|
|
4177 case 1:
|
|
|
4178 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4179 {
|
|
|
4180 ensure_shift_out (str, dst);
|
|
|
4181 half = 0;
|
|
|
4182 }
|
|
|
4183 else
|
|
|
4184 half = 1;
|
|
|
4185 break;
|
|
|
4186
|
|
|
4187 case 2:
|
|
|
4188 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
4189 {
|
|
|
4190 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4191 Dynarr_add (dst, 'N');
|
|
|
4192 half = 0;
|
|
|
4193 }
|
|
|
4194 else
|
|
|
4195 {
|
|
|
4196 Dynarr_add (dst, ISO_CODE_SS2);
|
|
|
4197 half = 1;
|
|
|
4198 }
|
|
|
4199 break;
|
|
|
4200
|
|
|
4201 case 3:
|
|
|
4202 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
4203 {
|
|
|
4204 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4205 Dynarr_add (dst, 'O');
|
|
|
4206 half = 0;
|
|
|
4207 }
|
|
|
4208 else
|
|
|
4209 {
|
|
|
4210 Dynarr_add (dst, ISO_CODE_SS3);
|
|
|
4211 half = 1;
|
|
|
4212 }
|
|
|
4213 break;
|
|
|
4214
|
|
|
4215 default:
|
|
|
4216 abort ();
|
|
|
4217 }
|
|
|
4218 }
|
|
|
4219 char_boundary = 0;
|
|
|
4220 }
|
|
|
4221 else
|
|
|
4222 { /* Processing Non-ASCII character */
|
|
|
4223 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
|
4224 char_boundary = 1;
|
|
|
4225 if (EQ (charset, Vcharset_control_1))
|
|
|
4226 {
|
|
|
4227 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4228 && fit_to_be_escape_quoted (c))
|
|
|
4229 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4230 /* you asked for it ... */
|
|
|
4231 Dynarr_add (dst, c - 0x20);
|
|
|
4232 }
|
|
|
4233 else
|
|
|
4234 {
|
|
|
4235 switch (XCHARSET_REP_BYTES (charset))
|
|
|
4236 {
|
|
|
4237 case 2:
|
|
|
4238 Dynarr_add (dst, c & charmask);
|
|
|
4239 break;
|
|
|
4240 case 3:
|
|
|
4241 if (XCHARSET_PRIVATE_P (charset))
|
|
|
4242 {
|
|
|
4243 Dynarr_add (dst, c & charmask);
|
|
|
4244 ch = 0;
|
|
|
4245 }
|
|
|
4246 else if (ch)
|
|
|
4247 {
|
|
|
4248 if (EQ (charset, Vcharset_composite))
|
|
|
4249 {
|
|
|
4250 if (in_composite)
|
|
|
4251 {
|
|
|
4252 /* #### Bother! We don't know how to
|
|
|
4253 handle this yet. */
|
|
|
4254 Dynarr_add (dst, '~');
|
|
|
4255 }
|
|
|
4256 else
|
|
|
4257 {
|
|
|
4258 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
4259 ch & 0x7F, c & 0x7F);
|
|
|
4260 Lisp_Object lstr = composite_char_string (emch);
|
|
|
4261 saved_n = n;
|
|
|
4262 saved_src = src;
|
|
|
4263 in_composite = 1;
|
|
|
4264 src = XSTRING_DATA (lstr);
|
|
|
4265 n = XSTRING_LENGTH (lstr);
|
|
|
4266 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4267 Dynarr_add (dst, '0'); /* start composing */
|
|
|
4268 }
|
|
|
4269 }
|
|
|
4270 else
|
|
|
4271 {
|
|
|
4272 Dynarr_add (dst, ch & charmask);
|
|
|
4273 Dynarr_add (dst, c & charmask);
|
|
|
4274 }
|
|
|
4275 ch = 0;
|
|
|
4276 }
|
|
|
4277 else
|
|
|
4278 {
|
|
|
4279 ch = c;
|
|
|
4280 char_boundary = 0;
|
|
|
4281 }
|
|
|
4282 break;
|
|
|
4283 case 4:
|
|
|
4284 if (ch)
|
|
|
4285 {
|
|
|
4286 Dynarr_add (dst, ch & charmask);
|
|
|
4287 Dynarr_add (dst, c & charmask);
|
|
|
4288 ch = 0;
|
|
|
4289 }
|
|
|
4290 else
|
|
|
4291 {
|
|
|
4292 ch = c;
|
|
|
4293 char_boundary = 0;
|
|
|
4294 }
|
|
|
4295 break;
|
|
|
4296 default:
|
|
|
4297 abort ();
|
|
|
4298 }
|
|
|
4299 }
|
|
|
4300 }
|
|
|
4301 }
|
|
|
4302
|
|
|
4303 if (in_composite)
|
|
|
4304 {
|
|
|
4305 n = saved_n;
|
|
|
4306 src = saved_src;
|
|
|
4307 in_composite = 0;
|
|
|
4308 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4309 Dynarr_add (dst, '1'); /* end composing */
|
|
|
4310 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
4311 }
|
|
|
4312
|
|
|
4313 if (char_boundary && flags & CODING_STATE_END)
|
|
|
4314 {
|
|
|
4315 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4316 ensure_normal_shift (str, dst);
|
|
|
4317 for (i = 0; i < 4; i++)
|
|
|
4318 {
|
|
|
4319 Lisp_Object initial_charset =
|
|
|
4320 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
4321 iso2022_designate (initial_charset, i, str, dst);
|
|
|
4322 }
|
|
|
4323 }
|
|
183
|
4324
|
|
70
|
4325 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4326 str->iso2022.current_char_boundary = char_boundary;
|
|
|
4327 str->iso2022.current_charset = charset;
|
|
|
4328 str->iso2022.current_half = half;
|
|
|
4329
|
|
|
4330 /* Verbum caro factum est! */
|
|
|
4331 }
|
|
|
4332
|
|
|
4333
|
|
|
4334 /************************************************************************/
|
|
|
4335 /* No-conversion methods */
|
|
|
4336 /************************************************************************/
|
|
|
4337
|
|
|
4338 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
4339 contain all 256 possible byte values and that are not to be
|
|
|
4340 interpreted as being in any particular decoding. */
|
|
|
4341 static void
|
|
|
4342 decode_coding_no_conversion (Lstream *decoding, CONST unsigned char *src,
|
|
|
4343 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4344 {
|
|
|
4345 unsigned char c;
|
|
|
4346 unsigned int flags, ch;
|
|
181
|
4347 enum eol_type eol_type;
|
|
70
|
4348 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
4349
|
|
|
4350 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
4351 eol_type = str->eol_type;
|
|
70
|
4352
|
|
|
4353 while (n--)
|
|
|
4354 {
|
|
|
4355 c = *src++;
|
|
183
|
4356
|
|
181
|
4357 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
4358 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4359 label_continue_loop:;
|
|
|
4360 }
|
|
|
4361
|
|
|
4362 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
4363
|
|
|
4364 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4365 }
|
|
|
4366
|
|
|
4367 static void
|
|
|
4368 encode_coding_no_conversion (Lstream *encoding, CONST unsigned char *src,
|
|
|
4369 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4370 {
|
|
|
4371 unsigned char c;
|
|
|
4372 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
181
|
4373 unsigned int flags, ch;
|
|
|
4374 enum eol_type eol_type;
|
|
70
|
4375
|
|
|
4376 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
4377 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
4378
|
|
|
4379 while (n--)
|
|
|
4380 {
|
|
|
4381 c = *src++;
|
|
|
4382 if (c == '\n')
|
|
|
4383 {
|
|
181
|
4384 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
4385 Dynarr_add (dst, '\r');
|
|
181
|
4386 if (eol_type != EOL_CR)
|
|
70
|
4387 Dynarr_add (dst, '\n');
|
|
|
4388 ch = 0;
|
|
|
4389 }
|
|
|
4390 else if (BYTE_ASCII_P (c))
|
|
|
4391 {
|
|
|
4392 assert (ch == 0);
|
|
|
4393 Dynarr_add (dst, c);
|
|
|
4394 }
|
|
|
4395 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
4396 {
|
|
|
4397 assert (ch == 0);
|
|
74
|
4398 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
4399 c == LEADING_BYTE_CONTROL_1)
|
|
70
|
4400 ch = c;
|
|
|
4401 else
|
|
|
4402 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
4403 }
|
|
|
4404 else
|
|
|
4405 {
|
|
74
|
4406 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
70
|
4407 Dynarr_add (dst, c);
|
|
|
4408 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
4409 {
|
|
|
4410 assert (c < 0xC0);
|
|
|
4411 Dynarr_add (dst, c - 0x20);
|
|
|
4412 }
|
|
|
4413 /* else it should be the second or third byte of an
|
|
|
4414 untranslatable character, so ignore it */
|
|
|
4415 ch = 0;
|
|
|
4416 }
|
|
|
4417 }
|
|
|
4418
|
|
|
4419 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4420 }
|
|
|
4421
|
|
|
4422
|
|
|
4423 /************************************************************************/
|
|
|
4424 /* Simple internal/external functions */
|
|
|
4425 /************************************************************************/
|
|
|
4426
|
|
185
|
4427 static Extbyte_dynarr *conversion_out_dynarr;
|
|
|
4428 static Bufbyte_dynarr *conversion_in_dynarr;
|
|
70
|
4429
|
|
|
4430 /* Determine coding system from coding format */
|
|
|
4431
|
|
197
|
4432 #define FILE_NAME_CODING_SYSTEM \
|
|
|
4433 ((NILP (Vfile_name_coding_system) || \
|
|
|
4434 (EQ ((Vfile_name_coding_system), Qbinary))) ? \
|
|
|
4435 Qnil : Fget_coding_system (Vfile_name_coding_system))
|
|
183
|
4436
|
|
70
|
4437 /* #### not correct for all values of `fmt'! */
|
|
|
4438 #define FMT_CODING_SYSTEM(fmt) \
|
|
197
|
4439 (((fmt) == FORMAT_FILENAME) ? FILE_NAME_CODING_SYSTEM : \
|
|
70
|
4440 ((fmt) == FORMAT_CTEXT ) ? Fget_coding_system (Qctext) : \
|
|
197
|
4441 ((fmt) == FORMAT_TERMINAL) ? FILE_NAME_CODING_SYSTEM : \
|
|
70
|
4442 Qnil)
|
|
|
4443
|
|
272
|
4444 CONST Extbyte *
|
|
70
|
4445 convert_to_external_format (CONST Bufbyte *ptr,
|
|
|
4446 Bytecount len,
|
|
|
4447 Extcount *len_out,
|
|
|
4448 enum external_data_format fmt)
|
|
|
4449 {
|
|
|
4450 Lisp_Object coding_system = FMT_CODING_SYSTEM (fmt);
|
|
|
4451
|
|
|
4452 if (!conversion_out_dynarr)
|
|
|
4453 conversion_out_dynarr = Dynarr_new (Extbyte);
|
|
|
4454 else
|
|
|
4455 Dynarr_reset (conversion_out_dynarr);
|
|
|
4456
|
|
|
4457 if (NILP (coding_system))
|
|
183
|
4458 {
|
|
70
|
4459 CONST Bufbyte *end = ptr + len;
|
|
|
4460
|
|
|
4461 for (; ptr < end;)
|
|
|
4462 {
|
|
|
4463 Bufbyte c =
|
|
74
|
4464 (BYTE_ASCII_P (*ptr)) ? *ptr :
|
|
|
4465 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
|
|
|
4466 (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
|
|
70
|
4467 '~';
|
|
|
4468
|
|
|
4469 Dynarr_add (conversion_out_dynarr, (Extbyte) c);
|
|
|
4470 INC_CHARPTR (ptr);
|
|
|
4471 }
|
|
183
|
4472
|
|
70
|
4473 #ifdef ERROR_CHECK_BUFPOS
|
|
|
4474 assert (ptr == end);
|
|
|
4475 #endif
|
|
|
4476 }
|
|
|
4477 else
|
|
|
4478 {
|
|
185
|
4479 Lisp_Object instream, outstream, da_outstream;
|
|
|
4480 Lstream *istr, *ostr;
|
|
|
4481 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4482 char tempbuf[1024]; /* some random amount */
|
|
|
4483
|
|
|
4484 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
4485 da_outstream = make_dynarr_output_stream
|
|
70
|
4486 ((unsigned_char_dynarr *) conversion_out_dynarr);
|
|
|
4487 outstream =
|
|
185
|
4488 make_encoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
|
4489 istr = XLSTREAM (instream);
|
|
|
4490 ostr = XLSTREAM (outstream);
|
|
|
4491 GCPRO3 (instream, outstream, da_outstream);
|
|
70
|
4492 while (1)
|
|
|
4493 {
|
|
185
|
4494 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
70
|
4495 if (!size_in_bytes)
|
|
|
4496 break;
|
|
185
|
4497 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
70
|
4498 }
|
|
185
|
4499 Lstream_close (istr);
|
|
|
4500 Lstream_close (ostr);
|
|
70
|
4501 UNGCPRO;
|
|
185
|
4502 Lstream_delete (istr);
|
|
|
4503 Lstream_delete (ostr);
|
|
|
4504 Lstream_delete (XLSTREAM (da_outstream));
|
|
70
|
4505 }
|
|
|
4506
|
|
|
4507 *len_out = Dynarr_length (conversion_out_dynarr);
|
|
|
4508 Dynarr_add (conversion_out_dynarr, 0); /* remember to zero-terminate! */
|
|
|
4509 return Dynarr_atp (conversion_out_dynarr, 0);
|
|
|
4510 }
|
|
|
4511
|
|
272
|
4512 CONST Bufbyte *
|
|
70
|
4513 convert_from_external_format (CONST Extbyte *ptr,
|
|
|
4514 Extcount len,
|
|
|
4515 Bytecount *len_out,
|
|
|
4516 enum external_data_format fmt)
|
|
|
4517 {
|
|
|
4518 Lisp_Object coding_system = FMT_CODING_SYSTEM (fmt);
|
|
183
|
4519
|
|
70
|
4520 if (!conversion_in_dynarr)
|
|
|
4521 conversion_in_dynarr = Dynarr_new (Bufbyte);
|
|
|
4522 else
|
|
|
4523 Dynarr_reset (conversion_in_dynarr);
|
|
|
4524
|
|
|
4525 if (NILP (coding_system))
|
|
|
4526 {
|
|
|
4527 CONST Extbyte *end = ptr + len;
|
|
|
4528 for (; ptr < end; ptr++)
|
|
|
4529 {
|
|
|
4530 Extbyte c = *ptr;
|
|
|
4531 DECODE_ADD_BINARY_CHAR (c, conversion_in_dynarr);
|
|
|
4532 }
|
|
|
4533 }
|
|
|
4534 else
|
|
|
4535 {
|
|
185
|
4536 Lisp_Object instream, outstream, da_outstream;
|
|
|
4537 Lstream *istr, *ostr;
|
|
|
4538 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4539 char tempbuf[1024]; /* some random amount */
|
|
|
4540
|
|
|
4541 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
4542 da_outstream = make_dynarr_output_stream
|
|
70
|
4543 ((unsigned_char_dynarr *) conversion_in_dynarr);
|
|
|
4544 outstream =
|
|
185
|
4545 make_decoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
|
4546 istr = XLSTREAM (instream);
|
|
|
4547 ostr = XLSTREAM (outstream);
|
|
|
4548 GCPRO3 (instream, outstream, da_outstream);
|
|
70
|
4549 while (1)
|
|
|
4550 {
|
|
185
|
4551 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
70
|
4552 if (!size_in_bytes)
|
|
|
4553 break;
|
|
185
|
4554 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
70
|
4555 }
|
|
185
|
4556 Lstream_close (istr);
|
|
|
4557 Lstream_close (ostr);
|
|
70
|
4558 UNGCPRO;
|
|
185
|
4559 Lstream_delete (istr);
|
|
|
4560 Lstream_delete (ostr);
|
|
|
4561 Lstream_delete (XLSTREAM (da_outstream));
|
|
70
|
4562 }
|
|
|
4563
|
|
|
4564 *len_out = Dynarr_length (conversion_in_dynarr);
|
|
|
4565 Dynarr_add (conversion_in_dynarr, 0); /* remember to zero-terminate! */
|
|
|
4566 return Dynarr_atp (conversion_in_dynarr, 0);
|
|
|
4567 }
|
|
|
4568
|
|
|
4569
|
|
|
4570 /************************************************************************/
|
|
|
4571 /* Initialization */
|
|
|
4572 /************************************************************************/
|
|
|
4573
|
|
|
4574 void
|
|
|
4575 syms_of_mule_coding (void)
|
|
|
4576 {
|
|
110
|
4577 defsymbol (&Qbuffer_file_coding_system, "buffer-file-coding-system");
|
|
70
|
4578 deferror (&Qcoding_system_error, "coding-system-error",
|
|
|
4579 "Coding-system error", Qio_error);
|
|
|
4580
|
|
|
4581 DEFSUBR (Fcoding_system_p);
|
|
|
4582 DEFSUBR (Ffind_coding_system);
|
|
|
4583 DEFSUBR (Fget_coding_system);
|
|
|
4584 DEFSUBR (Fcoding_system_list);
|
|
|
4585 DEFSUBR (Fcoding_system_name);
|
|
|
4586 DEFSUBR (Fmake_coding_system);
|
|
|
4587 DEFSUBR (Fcopy_coding_system);
|
|
|
4588 DEFSUBR (Fsubsidiary_coding_system);
|
|
|
4589
|
|
|
4590 DEFSUBR (Fcoding_system_type);
|
|
|
4591 DEFSUBR (Fcoding_system_doc_string);
|
|
207
|
4592 DEFSUBR (Fcoding_system_charset);
|
|
70
|
4593 DEFSUBR (Fcoding_system_property);
|
|
|
4594
|
|
|
4595 DEFSUBR (Fcoding_category_list);
|
|
|
4596 DEFSUBR (Fset_coding_priority_list);
|
|
|
4597 DEFSUBR (Fcoding_priority_list);
|
|
|
4598 DEFSUBR (Fset_coding_category_system);
|
|
|
4599 DEFSUBR (Fcoding_category_system);
|
|
183
|
4600
|
|
70
|
4601 DEFSUBR (Fdetect_coding_region);
|
|
|
4602 DEFSUBR (Fdecode_coding_region);
|
|
|
4603 DEFSUBR (Fencode_coding_region);
|
|
|
4604 DEFSUBR (Fdecode_shift_jis_char);
|
|
|
4605 DEFSUBR (Fencode_shift_jis_char);
|
|
|
4606 DEFSUBR (Fdecode_big5_char);
|
|
|
4607 DEFSUBR (Fencode_big5_char);
|
|
|
4608
|
|
|
4609 defsymbol (&Qcoding_system_p, "coding-system-p");
|
|
|
4610
|
|
|
4611 defsymbol (&Qbig5, "big5");
|
|
|
4612 defsymbol (&Qshift_jis, "shift-jis");
|
|
|
4613 defsymbol (&Qno_conversion, "no-conversion");
|
|
|
4614 defsymbol (&Qccl, "ccl");
|
|
|
4615 defsymbol (&Qiso2022, "iso2022");
|
|
|
4616
|
|
|
4617 defsymbol (&Qmnemonic, "mnemonic");
|
|
|
4618 defsymbol (&Qeol_type, "eol-type");
|
|
|
4619 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
|
4620 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
|
4621
|
|
|
4622 defsymbol (&Qcr, "cr");
|
|
|
4623 defsymbol (&Qlf, "lf");
|
|
|
4624 defsymbol (&Qcrlf, "crlf");
|
|
|
4625 defsymbol (&Qeol_cr, "eol-cr");
|
|
|
4626 defsymbol (&Qeol_lf, "eol-lf");
|
|
|
4627 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
|
4628
|
|
|
4629 defsymbol (&Qcharset_g0, "charset-g0");
|
|
|
4630 defsymbol (&Qcharset_g1, "charset-g1");
|
|
|
4631 defsymbol (&Qcharset_g2, "charset-g2");
|
|
|
4632 defsymbol (&Qcharset_g3, "charset-g3");
|
|
|
4633 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
|
4634 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
|
4635 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
|
4636 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
|
4637 defsymbol (&Qshort, "short");
|
|
|
4638 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
|
4639 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
|
4640 defsymbol (&Qseven, "seven");
|
|
|
4641 defsymbol (&Qlock_shift, "lock-shift");
|
|
|
4642 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
|
4643 defsymbol (&Qescape_quoted, "escape-quoted");
|
|
|
4644 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
|
4645 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
|
|
4646
|
|
|
4647 defsymbol (&Qencode, "encode");
|
|
|
4648 defsymbol (&Qdecode, "decode");
|
|
|
4649
|
|
|
4650 defsymbol (&Qctext, "ctext");
|
|
|
4651
|
|
|
4652 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
|
4653 "shift-jis");
|
|
|
4654 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
|
4655 "iso-7");
|
|
|
4656 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
|
4657 "iso-8-designate");
|
|
|
4658 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
|
4659 "iso-8-1");
|
|
|
4660 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
|
4661 "iso-8-2");
|
|
|
4662 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
|
4663 "iso-lock-shift");
|
|
|
4664 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
|
4665 "big5");
|
|
|
4666 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
|
4667 "no-conversion");
|
|
|
4668 }
|
|
|
4669
|
|
|
4670 void
|
|
|
4671 lstream_type_create_mule_coding (void)
|
|
|
4672 {
|
|
|
4673 LSTREAM_HAS_METHOD (decoding, reader);
|
|
|
4674 LSTREAM_HAS_METHOD (decoding, writer);
|
|
|
4675 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
|
4676 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
|
4677 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
|
4678 LSTREAM_HAS_METHOD (decoding, closer);
|
|
|
4679 LSTREAM_HAS_METHOD (decoding, marker);
|
|
|
4680
|
|
|
4681 LSTREAM_HAS_METHOD (encoding, reader);
|
|
|
4682 LSTREAM_HAS_METHOD (encoding, writer);
|
|
|
4683 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
|
4684 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
|
4685 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
|
4686 LSTREAM_HAS_METHOD (encoding, closer);
|
|
|
4687 LSTREAM_HAS_METHOD (encoding, marker);
|
|
|
4688 }
|
|
|
4689
|
|
|
4690 void
|
|
|
4691 vars_of_mule_coding (void)
|
|
|
4692 {
|
|
|
4693 int i;
|
|
|
4694
|
|
|
4695 /* Initialize to something reasonable ... */
|
|
|
4696 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
4697 {
|
|
|
4698 coding_category_system[i] = Qnil;
|
|
|
4699 coding_category_by_priority[i] = i;
|
|
|
4700 }
|
|
183
|
4701
|
|
70
|
4702 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
4703 Coding system used for TTY keyboard input.
|
|
|
4704 Not used under a windowing system.
|
|
|
4705 */ );
|
|
|
4706 Vkeyboard_coding_system = Qnil;
|
|
|
4707
|
|
|
4708 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
4709 Coding system used for TTY display output.
|
|
|
4710 Not used under a windowing system.
|
|
|
4711 */ );
|
|
|
4712 Vterminal_coding_system = Qnil;
|
|
|
4713
|
|
120
|
4714 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
|
4715 Overriding coding system used when writing a file or process.
|
|
|
4716 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
4717 the coding system that will be used when a file or process is read
|
|
|
4718 in, and overrides `buffer-file-coding-system-for-read',
|
|
|
4719 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
|
4720 this one for permanent changes to the environment.
|
|
70
|
4721 */ );
|
|
120
|
4722 Vcoding_system_for_read = Qnil;
|
|
|
4723
|
|
|
4724 DEFVAR_LISP ("coding-system-for-write",
|
|
|
4725 &Vcoding_system_for_write /*
|
|
|
4726 Overriding coding system used when writing a file or process.
|
|
|
4727 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
4728 the coding system that will be used when a file or process is wrote
|
|
|
4729 in, and overrides `buffer-file-coding-system',
|
|
|
4730 `write-region-pre-hook', etc. Use those variables instead of this one
|
|
|
4731 for permanent changes to the environment.
|
|
70
|
4732 */ );
|
|
120
|
4733 Vcoding_system_for_write = Qnil;
|
|
70
|
4734
|
|
197
|
4735 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
70
|
4736 Coding system used to convert pathnames when accessing files.
|
|
|
4737 */ );
|
|
197
|
4738 Vfile_name_coding_system = Qnil;
|
|
114
|
4739
|
|
|
4740 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
|
4741 Non-nil means the buffer contents are regarded as multi-byte form
|
|
|
4742 of characters, not a binary code. This affects the display, file I/O,
|
|
|
4743 and behaviors of various editing commands.
|
|
|
4744
|
|
|
4745 Setting this to nil does not do anything.
|
|
|
4746 */ );
|
|
|
4747 enable_multibyte_characters = 1;
|
|
70
|
4748 }
|
|
|
4749
|
|
|
4750 void
|
|
|
4751 complex_vars_of_mule_coding (void)
|
|
|
4752 {
|
|
|
4753 staticpro (&Vcoding_system_hashtable);
|
|
|
4754 Vcoding_system_hashtable = make_lisp_hashtable (50, HASHTABLE_NONWEAK,
|
|
|
4755 HASHTABLE_EQ);
|
|
|
4756
|
|
185
|
4757 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
|
|
70
|
4758
|
|
|
4759 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
|
4760 { \
|
|
|
4761 struct codesys_prop csp; \
|
|
|
4762 csp.sym = (Sym); \
|
|
|
4763 csp.prop_type = (Prop_Type); \
|
|
|
4764 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
|
4765 } while (0)
|
|
|
4766
|
|
|
4767 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
|
4768 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
|
4769 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
|
4770 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
|
4771 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
|
4772 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
|
4773 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
|
4774
|
|
|
4775 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
|
4776 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
|
4777 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
|
4778 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
|
4779 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
|
4780 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
|
4781 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
|
4782 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
|
4783 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
|
4784 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
|
4785 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
|
4786 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
|
4787 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
|
4788 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
|
4789 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
|
4790 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
|
4791 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
|
4792
|
|
|
4793 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
|
4794 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
|
4795
|
|
|
4796 /* Need to create this here or we're really screwed. */
|
|
|
4797 Fmake_coding_system (Qno_conversion, Qno_conversion, build_string ("No conversion"),
|
|
|
4798 list2 (Qmnemonic, build_string ("Noconv")));
|
|
|
4799
|
|
|
4800 Fcopy_coding_system (Fcoding_system_property (Qno_conversion, Qeol_lf),
|
|
|
4801 Qbinary);
|
|
|
4802
|
|
|
4803 /* Need this for bootstrapping */
|
|
|
4804 coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
|
|
4805 Fget_coding_system (Qno_conversion);
|
|
|
4806 }
|
|
259
|
4807
|
|
|
4808 #endif
|
