259
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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
|
|
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
|
|
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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259
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25
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26 #include <config.h>
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27 #include "lisp.h"
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420
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28
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259
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29 #include "buffer.h"
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30 #include "elhash.h"
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31 #include "insdel.h"
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32 #include "lstream.h"
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33 #ifdef MULE
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34 #include "mule-ccl.h"
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396
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35 #include "chartab.h"
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259
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36 #endif
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37 #include "file-coding.h"
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38
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424
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39 Lisp_Object Qcoding_system_error;
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259
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40
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41 Lisp_Object Vkeyboard_coding_system;
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42 Lisp_Object Vterminal_coding_system;
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43 Lisp_Object Vcoding_system_for_read;
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44 Lisp_Object Vcoding_system_for_write;
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45 Lisp_Object Vfile_name_coding_system;
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46
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47 /* Table of symbols identifying each coding category. */
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48 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST + 1];
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49
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424
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50
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51
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52 struct file_coding_dump {
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53 /* Coding system currently associated with each coding category. */
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54 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
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55
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56 /* Table of all coding categories in decreasing order of priority.
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57 This describes a permutation of the possible coding categories. */
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58 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
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59
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60 Lisp_Object ucs_to_mule_table[65536];
|
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61 } *fcd;
|
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62
|
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63 static const struct lrecord_description fcd_description_1[] = {
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64 { XD_LISP_OBJECT, offsetof(struct file_coding_dump, coding_category_system), CODING_CATEGORY_LAST + 1 },
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65 { XD_LISP_OBJECT, offsetof(struct file_coding_dump, ucs_to_mule_table), 65536 },
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66 { XD_END }
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67 };
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68
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69 static const struct struct_description fcd_description = {
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70 sizeof(struct file_coding_dump),
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71 fcd_description_1
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72 };
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73
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74 Lisp_Object mule_to_ucs_table;
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75
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76 Lisp_Object Qcoding_systemp;
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412
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77
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416
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78 Lisp_Object Qraw_text, Qno_conversion, Qccl, Qiso2022;
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259
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79 /* Qinternal in general.c */
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80
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81 Lisp_Object Qmnemonic, Qeol_type;
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82 Lisp_Object Qcr, Qcrlf, Qlf;
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83 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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84 Lisp_Object Qpost_read_conversion;
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85 Lisp_Object Qpre_write_conversion;
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86
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87 #ifdef MULE
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396
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88 Lisp_Object Qucs4, Qutf8;
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259
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89 Lisp_Object Qbig5, Qshift_jis;
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90 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
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91 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
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92 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
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93 Lisp_Object Qno_iso6429;
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94 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
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412
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95 Lisp_Object Qctext, Qescape_quoted;
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259
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96 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
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263
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97 #endif
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98 Lisp_Object Qencode, Qdecode;
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259
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99
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380
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100 Lisp_Object Vcoding_system_hash_table;
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259
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101
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102 int enable_multibyte_characters;
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103
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104 #ifdef MULE
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105 /* Additional information used by the ISO2022 decoder and detector. */
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106 struct iso2022_decoder
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107 {
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108 /* CHARSET holds the character sets currently assigned to the G0
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109 through G3 variables. It is initialized from the array
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110 INITIAL_CHARSET in CODESYS. */
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111 Lisp_Object charset[4];
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112
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113 /* Which registers are currently invoked into the left (GL) and
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114 right (GR) halves of the 8-bit encoding space? */
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115 int register_left, register_right;
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116
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117 /* ISO_ESC holds a value indicating part of an escape sequence
|
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118 that has already been seen. */
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119 enum iso_esc_flag esc;
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120
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121 /* This records the bytes we've seen so far in an escape sequence,
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122 in case the sequence is invalid (we spit out the bytes unchanged). */
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123 unsigned char esc_bytes[8];
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124
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125 /* Index for next byte to store in ISO escape sequence. */
|
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126 int esc_bytes_index;
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127
|
396
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128 #ifdef ENABLE_COMPOSITE_CHARS
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259
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129 /* Stuff seen so far when composing a string. */
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130 unsigned_char_dynarr *composite_chars;
|
396
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131 #endif
|
259
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132
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133 /* If we saw an invalid designation sequence for a particular
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134 register, we flag it here and switch to ASCII. The next time we
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135 see a valid designation for this register, we turn off the flag
|
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136 and do the designation normally, but pretend the sequence was
|
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137 invalid. The effect of all this is that (most of the time) the
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138 escape sequences for both the switch to the unknown charset, and
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139 the switch back to the known charset, get inserted literally into
|
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140 the buffer and saved out as such. The hope is that we can
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141 preserve the escape sequences so that the resulting written out
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142 file makes sense. If we don't do any of this, the designation
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143 to the invalid charset will be preserved but that switch back
|
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144 to the known charset will probably get eaten because it was
|
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145 the same charset that was already present in the register. */
|
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146 unsigned char invalid_designated[4];
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147
|
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148 /* We try to do similar things as above for direction-switching
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149 sequences. If we encountered a direction switch while an
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150 invalid designation was present, or an invalid designation
|
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151 just after a direction switch (i.e. no valid designation
|
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152 encountered yet), we insert the direction-switch escape
|
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153 sequence literally into the output stream, and later on
|
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154 insert the corresponding direction-restoring escape sequence
|
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155 literally also. */
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156 unsigned int switched_dir_and_no_valid_charset_yet :1;
|
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157 unsigned int invalid_switch_dir :1;
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158
|
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159 /* Tells the decoder to output the escape sequence literally
|
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160 even though it was valid. Used in the games we play to
|
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161 avoid lossage when we encounter invalid designations. */
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162 unsigned int output_literally :1;
|
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163 /* We encountered a direction switch followed by an invalid
|
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164 designation. We didn't output the direction switch
|
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165 literally because we didn't know about the invalid designation;
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166 but we have to do so now. */
|
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167 unsigned int output_direction_sequence :1;
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168 };
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272
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169 #endif /* MULE */
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170 EXFUN (Fcopy_coding_system, 2);
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259
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171 #ifdef MULE
|
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172 struct detection_state;
|
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173 static int detect_coding_sjis (struct detection_state *st,
|
412
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174 CONST unsigned char *src,
|
259
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175 unsigned int n);
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176 static void decode_coding_sjis (Lstream *decoding,
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412
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177 CONST unsigned char *src,
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259
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178 unsigned_char_dynarr *dst,
|
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179 unsigned int n);
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180 static void encode_coding_sjis (Lstream *encoding,
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412
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181 CONST unsigned char *src,
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259
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182 unsigned_char_dynarr *dst,
|
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183 unsigned int n);
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184 static int detect_coding_big5 (struct detection_state *st,
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412
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185 CONST unsigned char *src,
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259
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186 unsigned int n);
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187 static void decode_coding_big5 (Lstream *decoding,
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412
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188 CONST unsigned char *src,
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259
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189 unsigned_char_dynarr *dst, unsigned int n);
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190 static void encode_coding_big5 (Lstream *encoding,
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412
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191 CONST unsigned char *src,
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259
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192 unsigned_char_dynarr *dst, unsigned int n);
|
396
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193 static int detect_coding_ucs4 (struct detection_state *st,
|
412
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194 CONST unsigned char *src,
|
396
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195 unsigned int n);
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196 static void decode_coding_ucs4 (Lstream *decoding,
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412
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197 CONST unsigned char *src,
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396
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198 unsigned_char_dynarr *dst, unsigned int n);
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199 static void encode_coding_ucs4 (Lstream *encoding,
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412
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200 CONST unsigned char *src,
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396
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201 unsigned_char_dynarr *dst, unsigned int n);
|
|
202 static int detect_coding_utf8 (struct detection_state *st,
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412
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203 CONST unsigned char *src,
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396
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204 unsigned int n);
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205 static void decode_coding_utf8 (Lstream *decoding,
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412
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206 CONST unsigned char *src,
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396
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207 unsigned_char_dynarr *dst, unsigned int n);
|
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208 static void encode_coding_utf8 (Lstream *encoding,
|
412
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209 CONST unsigned char *src,
|
396
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210 unsigned_char_dynarr *dst, unsigned int n);
|
259
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211 static int postprocess_iso2022_mask (int mask);
|
|
212 static void reset_iso2022 (Lisp_Object coding_system,
|
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213 struct iso2022_decoder *iso);
|
|
214 static int detect_coding_iso2022 (struct detection_state *st,
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412
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215 CONST unsigned char *src,
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259
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216 unsigned int n);
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217 static void decode_coding_iso2022 (Lstream *decoding,
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412
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218 CONST unsigned char *src,
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259
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219 unsigned_char_dynarr *dst, unsigned int n);
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220 static void encode_coding_iso2022 (Lstream *encoding,
|
412
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221 CONST unsigned char *src,
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259
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222 unsigned_char_dynarr *dst, unsigned int n);
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223 #endif /* MULE */
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224 static void decode_coding_no_conversion (Lstream *decoding,
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412
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225 CONST unsigned char *src,
|
259
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226 unsigned_char_dynarr *dst,
|
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227 unsigned int n);
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228 static void encode_coding_no_conversion (Lstream *encoding,
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412
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229 CONST unsigned char *src,
|
259
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230 unsigned_char_dynarr *dst,
|
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231 unsigned int n);
|
412
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232 static void mule_decode (Lstream *decoding, CONST unsigned char *src,
|
259
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233 unsigned_char_dynarr *dst, unsigned int n);
|
412
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234 static void mule_encode (Lstream *encoding, CONST unsigned char *src,
|
259
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235 unsigned_char_dynarr *dst, unsigned int n);
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236
|
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237 typedef struct codesys_prop codesys_prop;
|
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238 struct codesys_prop
|
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239 {
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240 Lisp_Object sym;
|
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241 int prop_type;
|
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242 };
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243
|
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244 typedef struct
|
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245 {
|
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246 Dynarr_declare (codesys_prop);
|
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247 } codesys_prop_dynarr;
|
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248
|
424
|
249 static const struct lrecord_description codesys_prop_description_1[] = {
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250 { XD_LISP_OBJECT, offsetof(codesys_prop, sym), 1 },
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251 { XD_END }
|
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252 };
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253
|
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254 static const struct struct_description codesys_prop_description = {
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255 sizeof(codesys_prop),
|
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256 codesys_prop_description_1
|
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257 };
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258
|
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259 static const struct lrecord_description codesys_prop_dynarr_description_1[] = {
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260 XD_DYNARR_DESC(codesys_prop_dynarr, &codesys_prop_description),
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261 { XD_END }
|
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262 };
|
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263
|
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264 static const struct struct_description codesys_prop_dynarr_description = {
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265 sizeof(codesys_prop_dynarr),
|
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266 codesys_prop_dynarr_description_1
|
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267 };
|
|
268
|
259
|
269 codesys_prop_dynarr *the_codesys_prop_dynarr;
|
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270
|
|
271 enum codesys_prop_enum
|
|
272 {
|
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273 CODESYS_PROP_ALL_OK,
|
|
274 CODESYS_PROP_ISO2022,
|
|
275 CODESYS_PROP_CCL
|
|
276 };
|
|
277
|
|
278
|
|
279 /************************************************************************/
|
|
280 /* Coding system functions */
|
|
281 /************************************************************************/
|
|
282
|
424
|
283 static Lisp_Object mark_coding_system (Lisp_Object);
|
259
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284 static void print_coding_system (Lisp_Object, Lisp_Object, int);
|
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285 static void finalize_coding_system (void *header, int for_disksave);
|
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286
|
420
|
287 #ifdef MULE
|
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288 static const struct lrecord_description ccs_description_1[] = {
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289 { XD_LISP_OBJECT, offsetof(charset_conversion_spec, from_charset), 2 },
|
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290 { XD_END }
|
|
291 };
|
|
292
|
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293 static const struct struct_description ccs_description = {
|
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294 sizeof(charset_conversion_spec),
|
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295 ccs_description_1
|
|
296 };
|
|
297
|
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298 static const struct lrecord_description ccsd_description_1[] = {
|
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299 XD_DYNARR_DESC(charset_conversion_spec_dynarr, &ccs_description),
|
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300 { XD_END }
|
|
301 };
|
|
302
|
|
303 static const struct struct_description ccsd_description = {
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304 sizeof(charset_conversion_spec_dynarr),
|
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305 ccsd_description_1
|
|
306 };
|
|
307 #endif
|
|
308
|
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309 static const struct lrecord_description coding_system_description[] = {
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310 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, name), 2 },
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311 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, mnemonic), 3 },
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312 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, eol_lf), 3 },
|
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313 #ifdef MULE
|
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314 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, iso2022.initial_charset), 4 },
|
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315 { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
|
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316 { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
|
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317 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, ccl.decode), 2 },
|
|
318 #endif
|
|
319 { XD_END }
|
|
320 };
|
|
321
|
259
|
322 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
|
|
323 mark_coding_system, print_coding_system,
|
|
324 finalize_coding_system,
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420
|
325 0, 0, coding_system_description,
|
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326 struct Lisp_Coding_System);
|
259
|
327
|
|
328 static Lisp_Object
|
424
|
329 mark_coding_system (Lisp_Object obj)
|
259
|
330 {
|
396
|
331 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
|
259
|
332
|
424
|
333 mark_object (CODING_SYSTEM_NAME (codesys));
|
|
334 mark_object (CODING_SYSTEM_DOC_STRING (codesys));
|
|
335 mark_object (CODING_SYSTEM_MNEMONIC (codesys));
|
|
336 mark_object (CODING_SYSTEM_EOL_LF (codesys));
|
|
337 mark_object (CODING_SYSTEM_EOL_CRLF (codesys));
|
|
338 mark_object (CODING_SYSTEM_EOL_CR (codesys));
|
259
|
339
|
|
340 switch (CODING_SYSTEM_TYPE (codesys))
|
|
341 {
|
|
342 #ifdef MULE
|
|
343 int i;
|
|
344 case CODESYS_ISO2022:
|
|
345 for (i = 0; i < 4; i++)
|
424
|
346 mark_object (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
|
259
|
347 if (codesys->iso2022.input_conv)
|
|
348 {
|
|
349 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
|
|
350 {
|
|
351 struct charset_conversion_spec *ccs =
|
|
352 Dynarr_atp (codesys->iso2022.input_conv, i);
|
424
|
353 mark_object (ccs->from_charset);
|
|
354 mark_object (ccs->to_charset);
|
259
|
355 }
|
|
356 }
|
|
357 if (codesys->iso2022.output_conv)
|
|
358 {
|
|
359 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
|
|
360 {
|
|
361 struct charset_conversion_spec *ccs =
|
|
362 Dynarr_atp (codesys->iso2022.output_conv, i);
|
424
|
363 mark_object (ccs->from_charset);
|
|
364 mark_object (ccs->to_charset);
|
259
|
365 }
|
|
366 }
|
|
367 break;
|
|
368
|
|
369 case CODESYS_CCL:
|
424
|
370 mark_object (CODING_SYSTEM_CCL_DECODE (codesys));
|
|
371 mark_object (CODING_SYSTEM_CCL_ENCODE (codesys));
|
259
|
372 break;
|
272
|
373 #endif /* MULE */
|
259
|
374 default:
|
|
375 break;
|
|
376 }
|
|
377
|
424
|
378 mark_object (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
|
259
|
379 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
|
|
380 }
|
|
381
|
|
382 static void
|
|
383 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
|
|
384 int escapeflag)
|
|
385 {
|
396
|
386 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
259
|
387 if (print_readably)
|
|
388 error ("printing unreadable object #<coding_system 0x%x>",
|
|
389 c->header.uid);
|
|
390
|
|
391 write_c_string ("#<coding_system ", printcharfun);
|
|
392 print_internal (c->name, printcharfun, 1);
|
|
393 write_c_string (">", printcharfun);
|
|
394 }
|
|
395
|
|
396 static void
|
|
397 finalize_coding_system (void *header, int for_disksave)
|
|
398 {
|
396
|
399 Lisp_Coding_System *c = (Lisp_Coding_System *) header;
|
259
|
400 /* Since coding systems never go away, this function is not
|
|
401 necessary. But it would be necessary if we changed things
|
|
402 so that coding systems could go away. */
|
|
403 if (!for_disksave) /* see comment in lstream.c */
|
|
404 {
|
|
405 switch (CODING_SYSTEM_TYPE (c))
|
|
406 {
|
|
407 #ifdef MULE
|
|
408 case CODESYS_ISO2022:
|
|
409 if (c->iso2022.input_conv)
|
|
410 {
|
|
411 Dynarr_free (c->iso2022.input_conv);
|
|
412 c->iso2022.input_conv = 0;
|
|
413 }
|
|
414 if (c->iso2022.output_conv)
|
|
415 {
|
|
416 Dynarr_free (c->iso2022.output_conv);
|
|
417 c->iso2022.output_conv = 0;
|
|
418 }
|
|
419 break;
|
272
|
420 #endif /* MULE */
|
259
|
421 default:
|
|
422 break;
|
|
423 }
|
|
424 }
|
|
425 }
|
|
426
|
412
|
427 static enum eol_type
|
259
|
428 symbol_to_eol_type (Lisp_Object symbol)
|
|
429 {
|
|
430 CHECK_SYMBOL (symbol);
|
|
431 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
432 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
433 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
434 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
435
|
|
436 signal_simple_error ("Unrecognized eol type", symbol);
|
|
437 return EOL_AUTODETECT; /* not reached */
|
|
438 }
|
|
439
|
|
440 static Lisp_Object
|
412
|
441 eol_type_to_symbol (enum eol_type type)
|
259
|
442 {
|
|
443 switch (type)
|
|
444 {
|
380
|
445 default: abort ();
|
259
|
446 case EOL_LF: return Qlf;
|
|
447 case EOL_CRLF: return Qcrlf;
|
|
448 case EOL_CR: return Qcr;
|
|
449 case EOL_AUTODETECT: return Qnil;
|
|
450 }
|
|
451 }
|
|
452
|
|
453 static void
|
396
|
454 setup_eol_coding_systems (Lisp_Coding_System *codesys)
|
259
|
455 {
|
272
|
456 Lisp_Object codesys_obj;
|
259
|
457 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
|
|
458 char *codesys_name = (char *) alloca (len + 7);
|
261
|
459 int mlen = -1;
|
265
|
460 char *codesys_mnemonic=0;
|
259
|
461
|
|
462 Lisp_Object codesys_name_sym, sub_codesys_obj;
|
|
463
|
|
464 /* kludge */
|
|
465
|
|
466 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
467
|
|
468 memcpy (codesys_name,
|
|
469 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
|
|
470
|
261
|
471 if (STRINGP (CODING_SYSTEM_MNEMONIC (codesys)))
|
|
472 {
|
272
|
473 mlen = XSTRING_LENGTH (CODING_SYSTEM_MNEMONIC (codesys));
|
261
|
474 codesys_mnemonic = (char *) alloca (mlen + 7);
|
|
475 memcpy (codesys_mnemonic,
|
|
476 XSTRING_DATA (CODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
477 }
|
259
|
478
|
272
|
479 #define DEFINE_SUB_CODESYS(op_sys, op_sys_abbr, Type) do { \
|
|
480 strcpy (codesys_name + len, "-" op_sys); \
|
|
481 if (mlen != -1) \
|
|
482 strcpy (codesys_mnemonic + mlen, op_sys_abbr); \
|
|
483 codesys_name_sym = intern (codesys_name); \
|
|
484 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
|
|
485 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
|
|
486 if (mlen != -1) \
|
|
487 XCODING_SYSTEM_MNEMONIC(sub_codesys_obj) = \
|
|
488 build_string (codesys_mnemonic); \
|
|
489 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
|
259
|
490 } while (0)
|
|
491
|
|
492 DEFINE_SUB_CODESYS("unix", "", EOL_LF);
|
263
|
493 DEFINE_SUB_CODESYS("dos", ":T", EOL_CRLF);
|
|
494 DEFINE_SUB_CODESYS("mac", ":t", EOL_CR);
|
259
|
495 }
|
|
496
|
|
497 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
272
|
498 Return t if OBJECT is a coding system.
|
259
|
499 A coding system is an object that defines how text containing multiple
|
|
500 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
501 The coding system is used to decode the stream into a series of
|
|
502 characters (which may be from multiple charsets) when the text is read
|
|
503 from a file or process, and is used to encode the text back into the
|
|
504 same format when it is written out to a file or process.
|
|
505
|
|
506 For example, many ISO2022-compliant coding systems (such as Compound
|
|
507 Text, which is used for inter-client data under the X Window System)
|
|
508 use escape sequences to switch between different charsets -- Japanese
|
|
509 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
510 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
511 `make-coding-system' for more information.
|
|
512
|
|
513 Coding systems are normally identified using a symbol, and the
|
|
514 symbol is accepted in place of the actual coding system object whenever
|
|
515 a coding system is called for. (This is similar to how faces work.)
|
|
516 */
|
|
517 (object))
|
|
518 {
|
|
519 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
520 }
|
|
521
|
|
522 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
523 Retrieve the coding system of the given name.
|
|
524
|
|
525 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
526 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
527 If there is no such coding system, nil is returned. Otherwise the
|
|
528 associated coding system object is returned.
|
|
529 */
|
|
530 (coding_system_or_name))
|
|
531 {
|
412
|
532 if (CODING_SYSTEMP (coding_system_or_name))
|
|
533 return coding_system_or_name;
|
|
534
|
259
|
535 if (NILP (coding_system_or_name))
|
|
536 coding_system_or_name = Qbinary;
|
272
|
537 else
|
|
538 CHECK_SYMBOL (coding_system_or_name);
|
259
|
539
|
412
|
540 return Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
259
|
541 }
|
|
542
|
|
543 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
544 Retrieve the coding system of the given name.
|
|
545 Same as `find-coding-system' except that if there is no such
|
|
546 coding system, an error is signaled instead of returning nil.
|
|
547 */
|
|
548 (name))
|
|
549 {
|
|
550 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
551
|
|
552 if (NILP (coding_system))
|
|
553 signal_simple_error ("No such coding system", name);
|
|
554 return coding_system;
|
|
555 }
|
|
556
|
|
557 /* We store the coding systems in hash tables with the names as the key and the
|
|
558 actual coding system object as the value. Occasionally we need to use them
|
|
559 in a list format. These routines provide us with that. */
|
|
560 struct coding_system_list_closure
|
|
561 {
|
|
562 Lisp_Object *coding_system_list;
|
|
563 };
|
|
564
|
|
565 static int
|
380
|
566 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
|
259
|
567 void *coding_system_list_closure)
|
|
568 {
|
|
569 /* This function can GC */
|
|
570 struct coding_system_list_closure *cscl =
|
|
571 (struct coding_system_list_closure *) coding_system_list_closure;
|
380
|
572 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
573
|
412
|
574 *coding_system_list = Fcons (XCODING_SYSTEM (value)->name,
|
|
575 *coding_system_list);
|
259
|
576 return 0;
|
|
577 }
|
|
578
|
|
579 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
580 Return a list of the names of all defined coding systems.
|
|
581 */
|
|
582 ())
|
|
583 {
|
|
584 Lisp_Object coding_system_list = Qnil;
|
|
585 struct gcpro gcpro1;
|
|
586 struct coding_system_list_closure coding_system_list_closure;
|
|
587
|
|
588 GCPRO1 (coding_system_list);
|
|
589 coding_system_list_closure.coding_system_list = &coding_system_list;
|
380
|
590 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
259
|
591 &coding_system_list_closure);
|
|
592 UNGCPRO;
|
|
593
|
|
594 return coding_system_list;
|
|
595 }
|
|
596
|
|
597 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
598 Return the name of the given coding system.
|
|
599 */
|
|
600 (coding_system))
|
|
601 {
|
|
602 coding_system = Fget_coding_system (coding_system);
|
|
603 return XCODING_SYSTEM_NAME (coding_system);
|
|
604 }
|
|
605
|
396
|
606 static Lisp_Coding_System *
|
259
|
607 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
|
|
608 {
|
396
|
609 Lisp_Coding_System *codesys =
|
398
|
610 alloc_lcrecord_type (Lisp_Coding_System, &lrecord_coding_system);
|
259
|
611
|
|
612 zero_lcrecord (codesys);
|
|
613 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
614 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
615 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
616 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
617 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
618 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
619 CODING_SYSTEM_TYPE (codesys) = type;
|
261
|
620 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
|
259
|
621 #ifdef MULE
|
|
622 if (type == CODESYS_ISO2022)
|
|
623 {
|
|
624 int i;
|
|
625 for (i = 0; i < 4; i++)
|
|
626 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
627 }
|
|
628 else if (type == CODESYS_CCL)
|
|
629 {
|
|
630 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
631 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
632 }
|
272
|
633 #endif /* MULE */
|
259
|
634 CODING_SYSTEM_NAME (codesys) = name;
|
|
635
|
|
636 return codesys;
|
|
637 }
|
|
638
|
|
639 #ifdef MULE
|
|
640 /* Given a list of charset conversion specs as specified in a Lisp
|
|
641 program, parse it into STORE_HERE. */
|
|
642
|
|
643 static void
|
|
644 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
645 Lisp_Object spec_list)
|
|
646 {
|
|
647 Lisp_Object rest;
|
|
648
|
|
649 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
650 {
|
|
651 Lisp_Object car = XCAR (rest);
|
|
652 Lisp_Object from, to;
|
|
653 struct charset_conversion_spec spec;
|
|
654
|
|
655 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
656 signal_simple_error ("Invalid charset conversion spec", car);
|
|
657 from = Fget_charset (XCAR (car));
|
|
658 to = Fget_charset (XCAR (XCDR (car)));
|
|
659 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
660 signal_simple_error_2
|
|
661 ("Attempted conversion between different charset types",
|
|
662 from, to);
|
|
663 spec.from_charset = from;
|
|
664 spec.to_charset = to;
|
|
665
|
|
666 Dynarr_add (store_here, spec);
|
|
667 }
|
|
668 }
|
|
669
|
|
670 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
671 specs, return the equivalent as the Lisp programmer would see it.
|
|
672
|
|
673 If LOAD_HERE is 0, return Qnil. */
|
|
674
|
|
675 static Lisp_Object
|
|
676 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
677 {
|
|
678 int i;
|
272
|
679 Lisp_Object result;
|
259
|
680
|
|
681 if (!load_here)
|
|
682 return Qnil;
|
272
|
683 for (i = 0, result = Qnil; i < Dynarr_length (load_here); i++)
|
259
|
684 {
|
272
|
685 struct charset_conversion_spec *ccs = Dynarr_atp (load_here, i);
|
259
|
686 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
687 }
|
|
688
|
|
689 return Fnreverse (result);
|
|
690 }
|
|
691
|
272
|
692 #endif /* MULE */
|
259
|
693
|
|
694 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
695 Register symbol NAME as a coding system.
|
|
696
|
|
697 TYPE describes the conversion method used and should be one of
|
|
698
|
|
699 nil or 'undecided
|
|
700 Automatic conversion. XEmacs attempts to detect the coding system
|
|
701 used in the file.
|
|
702 'no-conversion
|
|
703 No conversion. Use this for binary files and such. On output,
|
|
704 graphic characters that are not in ASCII or Latin-1 will be
|
|
705 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
706 characters will only be present if you explicitly insert them.)
|
|
707 'shift-jis
|
|
708 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
396
|
709 'ucs-4
|
|
710 ISO 10646 UCS-4 encoding.
|
|
711 'utf-8
|
|
712 ISO 10646 UTF-8 encoding.
|
259
|
713 'iso2022
|
|
714 Any ISO2022-compliant encoding. Among other things, this includes
|
|
715 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
716 standard Unix encoding for Japanese and other languages), and
|
|
717 Compound Text (the encoding used in X11). You can specify more
|
371
|
718 specific information about the conversion with the FLAGS argument.
|
259
|
719 'big5
|
|
720 Big5 (the encoding commonly used for Taiwanese).
|
|
721 'ccl
|
|
722 The conversion is performed using a user-written pseudo-code
|
|
723 program. CCL (Code Conversion Language) is the name of this
|
|
724 pseudo-code.
|
|
725 'internal
|
|
726 Write out or read in the raw contents of the memory representing
|
|
727 the buffer's text. This is primarily useful for debugging
|
|
728 purposes, and is only enabled when XEmacs has been compiled with
|
|
729 DEBUG_XEMACS defined (via the --debug configure option).
|
|
730 WARNING: Reading in a file using 'internal conversion can result
|
|
731 in an internal inconsistency in the memory representing a
|
|
732 buffer's text, which will produce unpredictable results and may
|
|
733 cause XEmacs to crash. Under normal circumstances you should
|
|
734 never use 'internal conversion.
|
|
735
|
|
736 DOC-STRING is a string describing the coding system.
|
|
737
|
|
738 PROPS is a property list, describing the specific nature of the
|
|
739 character set. Recognized properties are:
|
|
740
|
|
741 'mnemonic
|
|
742 String to be displayed in the modeline when this coding system is
|
|
743 active.
|
|
744
|
|
745 'eol-type
|
|
746 End-of-line conversion to be used. It should be one of
|
|
747
|
|
748 nil
|
|
749 Automatically detect the end-of-line type (LF, CRLF,
|
|
750 or CR). Also generate subsidiary coding systems named
|
|
751 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
752 identical to this coding system but have an EOL-TYPE
|
|
753 value of 'lf, 'crlf, and 'cr, respectively.
|
|
754 'lf
|
|
755 The end of a line is marked externally using ASCII LF.
|
|
756 Since this is also the way that XEmacs represents an
|
|
757 end-of-line internally, specifying this option results
|
|
758 in no end-of-line conversion. This is the standard
|
|
759 format for Unix text files.
|
|
760 'crlf
|
|
761 The end of a line is marked externally using ASCII
|
|
762 CRLF. This is the standard format for MS-DOS text
|
|
763 files.
|
|
764 'cr
|
|
765 The end of a line is marked externally using ASCII CR.
|
|
766 This is the standard format for Macintosh text files.
|
|
767 t
|
|
768 Automatically detect the end-of-line type but do not
|
|
769 generate subsidiary coding systems. (This value is
|
|
770 converted to nil when stored internally, and
|
|
771 `coding-system-property' will return nil.)
|
|
772
|
|
773 'post-read-conversion
|
|
774 Function called after a file has been read in, to perform the
|
|
775 decoding. Called with two arguments, BEG and END, denoting
|
|
776 a region of the current buffer to be decoded.
|
|
777
|
|
778 'pre-write-conversion
|
|
779 Function called before a file is written out, to perform the
|
|
780 encoding. Called with two arguments, BEG and END, denoting
|
|
781 a region of the current buffer to be encoded.
|
|
782
|
|
783
|
|
784 The following additional properties are recognized if TYPE is 'iso2022:
|
|
785
|
|
786 'charset-g0
|
|
787 'charset-g1
|
|
788 'charset-g2
|
|
789 'charset-g3
|
|
790 The character set initially designated to the G0 - G3 registers.
|
|
791 The value should be one of
|
|
792
|
|
793 -- A charset object (designate that character set)
|
|
794 -- nil (do not ever use this register)
|
|
795 -- t (no character set is initially designated to
|
|
796 the register, but may be later on; this automatically
|
|
797 sets the corresponding `force-g*-on-output' property)
|
|
798
|
|
799 'force-g0-on-output
|
|
800 'force-g1-on-output
|
|
801 'force-g2-on-output
|
|
802 'force-g2-on-output
|
|
803 If non-nil, send an explicit designation sequence on output before
|
|
804 using the specified register.
|
|
805
|
|
806 'short
|
|
807 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
808 "ESC $ B" on output in place of the full designation sequences
|
|
809 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
810
|
|
811 'no-ascii-eol
|
|
812 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
813 Setting this to non-nil also suppresses other state-resetting that
|
|
814 normally happens at the end of a line.
|
|
815
|
|
816 'no-ascii-cntl
|
|
817 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
818
|
|
819 'seven
|
|
820 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
821 environment.
|
|
822
|
|
823 'lock-shift
|
|
824 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
825 or designation by escape sequence.
|
|
826
|
|
827 'no-iso6429
|
|
828 If non-nil, don't use ISO6429's direction specification.
|
|
829
|
|
830 'escape-quoted
|
|
831 If non-nil, literal control characters that are the same as
|
|
832 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
833 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
834 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
835 so that they can be properly distinguished from an escape sequence.
|
|
836 (Note that doing this results in a non-portable encoding.) This
|
|
837 encoding flag is used for byte-compiled files. Note that ESC
|
|
838 is a good choice for a quoting character because there are no
|
|
839 escape sequences whose second byte is a character from the Control-0
|
|
840 or Control-1 character sets; this is explicitly disallowed by the
|
|
841 ISO2022 standard.
|
|
842
|
|
843 'input-charset-conversion
|
|
844 A list of conversion specifications, specifying conversion of
|
|
845 characters in one charset to another when decoding is performed.
|
|
846 Each specification is a list of two elements: the source charset,
|
|
847 and the destination charset.
|
|
848
|
|
849 'output-charset-conversion
|
|
850 A list of conversion specifications, specifying conversion of
|
|
851 characters in one charset to another when encoding is performed.
|
|
852 The form of each specification is the same as for
|
|
853 'input-charset-conversion.
|
|
854
|
|
855
|
|
856 The following additional properties are recognized (and required)
|
|
857 if TYPE is 'ccl:
|
|
858
|
|
859 'decode
|
|
860 CCL program used for decoding (converting to internal format).
|
|
861
|
|
862 'encode
|
|
863 CCL program used for encoding (converting to external format).
|
|
864 */
|
|
865 (name, type, doc_string, props))
|
|
866 {
|
396
|
867 Lisp_Coding_System *codesys;
|
259
|
868 Lisp_Object rest, key, value;
|
|
869 enum coding_system_type ty;
|
|
870 int need_to_setup_eol_systems = 1;
|
|
871
|
|
872 /* Convert type to constant */
|
|
873 if (NILP (type) || EQ (type, Qundecided))
|
|
874 { ty = CODESYS_AUTODETECT; }
|
|
875 #ifdef MULE
|
|
876 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
877 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
878 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
396
|
879 else if (EQ (type, Qucs4)) { ty = CODESYS_UCS4; }
|
|
880 else if (EQ (type, Qutf8)) { ty = CODESYS_UTF8; }
|
259
|
881 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
882 #endif
|
|
883 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
884 #ifdef DEBUG_XEMACS
|
|
885 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
886 #endif
|
|
887 else
|
|
888 signal_simple_error ("Invalid coding system type", type);
|
|
889
|
|
890 CHECK_SYMBOL (name);
|
|
891
|
|
892 codesys = allocate_coding_system (ty, name);
|
|
893
|
|
894 if (NILP (doc_string))
|
|
895 doc_string = build_string ("");
|
|
896 else
|
|
897 CHECK_STRING (doc_string);
|
|
898 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
899
|
|
900 EXTERNAL_PROPERTY_LIST_LOOP (rest, key, value, props)
|
|
901 {
|
|
902 if (EQ (key, Qmnemonic))
|
|
903 {
|
|
904 if (!NILP (value))
|
|
905 CHECK_STRING (value);
|
|
906 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
907 }
|
|
908
|
|
909 else if (EQ (key, Qeol_type))
|
|
910 {
|
|
911 need_to_setup_eol_systems = NILP (value);
|
|
912 if (EQ (value, Qt))
|
|
913 value = Qnil;
|
|
914 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
915 }
|
|
916
|
|
917 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
918 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
919 #ifdef MULE
|
|
920 else if (ty == CODESYS_ISO2022)
|
|
921 {
|
|
922 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
923 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
924 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
925
|
|
926 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
927 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
928 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
929 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
930
|
|
931 #define FROB_FORCE_CHARSET(charset_num) \
|
|
932 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
933
|
|
934 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
935 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
936 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
937 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
938
|
|
939 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
940 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
941
|
|
942 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
943 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
944 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
945 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
946 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
947 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
948 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
949
|
|
950 else if (EQ (key, Qinput_charset_conversion))
|
|
951 {
|
|
952 codesys->iso2022.input_conv =
|
|
953 Dynarr_new (charset_conversion_spec);
|
|
954 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
955 value);
|
|
956 }
|
|
957 else if (EQ (key, Qoutput_charset_conversion))
|
|
958 {
|
|
959 codesys->iso2022.output_conv =
|
|
960 Dynarr_new (charset_conversion_spec);
|
|
961 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
962 value);
|
|
963 }
|
|
964 else
|
|
965 signal_simple_error ("Unrecognized property", key);
|
|
966 }
|
|
967 else if (EQ (type, Qccl))
|
|
968 {
|
|
969 if (EQ (key, Qdecode))
|
|
970 {
|
|
971 CHECK_VECTOR (value);
|
|
972 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
973 }
|
|
974 else if (EQ (key, Qencode))
|
|
975 {
|
|
976 CHECK_VECTOR (value);
|
|
977 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
978 }
|
|
979 else
|
|
980 signal_simple_error ("Unrecognized property", key);
|
|
981 }
|
|
982 #endif /* MULE */
|
|
983 else
|
|
984 signal_simple_error ("Unrecognized property", key);
|
|
985 }
|
|
986
|
|
987 if (need_to_setup_eol_systems)
|
|
988 setup_eol_coding_systems (codesys);
|
|
989
|
|
990 {
|
|
991 Lisp_Object codesys_obj;
|
|
992 XSETCODING_SYSTEM (codesys_obj, codesys);
|
380
|
993 Fputhash (name, codesys_obj, Vcoding_system_hash_table);
|
259
|
994 return codesys_obj;
|
|
995 }
|
|
996 }
|
|
997
|
|
998 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
999 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
1000 If NEW-NAME does not name an existing coding system, a new one will
|
|
1001 be created.
|
|
1002 */
|
|
1003 (old_coding_system, new_name))
|
|
1004 {
|
|
1005 Lisp_Object new_coding_system;
|
|
1006 old_coding_system = Fget_coding_system (old_coding_system);
|
|
1007 new_coding_system = Ffind_coding_system (new_name);
|
|
1008 if (NILP (new_coding_system))
|
|
1009 {
|
|
1010 XSETCODING_SYSTEM (new_coding_system,
|
|
1011 allocate_coding_system
|
|
1012 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
1013 new_name));
|
380
|
1014 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
259
|
1015 }
|
|
1016
|
|
1017 {
|
396
|
1018 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
1019 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
259
|
1020 memcpy (((char *) to ) + sizeof (to->header),
|
|
1021 ((char *) from) + sizeof (from->header),
|
|
1022 sizeof (*from) - sizeof (from->header));
|
|
1023 to->name = new_name;
|
|
1024 }
|
|
1025 return new_coding_system;
|
|
1026 }
|
|
1027
|
412
|
1028 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
1029 Define symbol ALIAS as an alias for coding system CODING-SYSTEM.
|
398
|
1030 */
|
412
|
1031 (alias, coding_system))
|
398
|
1032 {
|
|
1033 CHECK_SYMBOL (alias);
|
412
|
1034 if (!NILP (Ffind_coding_system (alias)))
|
|
1035 signal_simple_error ("Symbol already names a coding system", alias);
|
|
1036 coding_system = Fget_coding_system (coding_system);
|
|
1037 Fputhash (alias, coding_system, Vcoding_system_hash_table);
|
|
1038
|
|
1039 /* Set up aliases for subsidiaries. */
|
|
1040 if (XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
398
|
1041 {
|
412
|
1042 Lisp_Object str;
|
|
1043 XSETSTRING (str, symbol_name (XSYMBOL (alias)));
|
|
1044 #define FROB(type, name) \
|
|
1045 do { \
|
|
1046 Lisp_Object subsidiary = XCODING_SYSTEM_EOL_##type (coding_system); \
|
|
1047 if (!NILP (subsidiary)) \
|
|
1048 Fdefine_coding_system_alias \
|
|
1049 (Fintern (concat2 (str, build_string (name)), Qnil), subsidiary); \
|
|
1050 } while (0)
|
|
1051 FROB (LF, "-unix");
|
|
1052 FROB (CRLF, "-dos");
|
|
1053 FROB (CR, "-mac");
|
|
1054 #undef FROB
|
398
|
1055 }
|
412
|
1056 /* FSF return value is a vector of [ALIAS-unix ALIAS-doc ALIAS-mac],
|
398
|
1057 but it doesn't look intentional, so I'd rather return something
|
|
1058 meaningful or nothing at all. */
|
|
1059 return Qnil;
|
|
1060 }
|
|
1061
|
|
1062 static Lisp_Object
|
412
|
1063 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
259
|
1064 {
|
396
|
1065 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
259
|
1066 Lisp_Object new_coding_system;
|
|
1067
|
|
1068 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
1069 return coding_system;
|
|
1070
|
|
1071 switch (type)
|
|
1072 {
|
|
1073 case EOL_AUTODETECT: return coding_system;
|
|
1074 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
1075 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
1076 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
1077 default: abort ();
|
|
1078 }
|
|
1079
|
|
1080 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
1081 }
|
|
1082
|
|
1083 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
1084 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
1085 */
|
|
1086 (coding_system, eol_type))
|
|
1087 {
|
|
1088 coding_system = Fget_coding_system (coding_system);
|
|
1089
|
|
1090 return subsidiary_coding_system (coding_system,
|
|
1091 symbol_to_eol_type (eol_type));
|
|
1092 }
|
|
1093
|
|
1094
|
|
1095 /************************************************************************/
|
|
1096 /* Coding system accessors */
|
|
1097 /************************************************************************/
|
|
1098
|
|
1099 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
1100 Return the doc string for CODING-SYSTEM.
|
|
1101 */
|
|
1102 (coding_system))
|
|
1103 {
|
|
1104 coding_system = Fget_coding_system (coding_system);
|
|
1105 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
1106 }
|
|
1107
|
|
1108 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
1109 Return the type of CODING-SYSTEM.
|
|
1110 */
|
|
1111 (coding_system))
|
|
1112 {
|
|
1113 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
1114 {
|
380
|
1115 default: abort ();
|
259
|
1116 case CODESYS_AUTODETECT: return Qundecided;
|
|
1117 #ifdef MULE
|
|
1118 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
1119 case CODESYS_ISO2022: return Qiso2022;
|
|
1120 case CODESYS_BIG5: return Qbig5;
|
396
|
1121 case CODESYS_UCS4: return Qucs4;
|
|
1122 case CODESYS_UTF8: return Qutf8;
|
259
|
1123 case CODESYS_CCL: return Qccl;
|
|
1124 #endif
|
|
1125 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
1126 #ifdef DEBUG_XEMACS
|
|
1127 case CODESYS_INTERNAL: return Qinternal;
|
|
1128 #endif
|
|
1129 }
|
|
1130 }
|
|
1131
|
|
1132 #ifdef MULE
|
|
1133 static
|
|
1134 Lisp_Object coding_system_charset (Lisp_Object coding_system, int gnum)
|
|
1135 {
|
|
1136 Lisp_Object cs
|
|
1137 = XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, gnum);
|
272
|
1138
|
|
1139 return CHARSETP (cs) ? XCHARSET_NAME (cs) : Qnil;
|
259
|
1140 }
|
|
1141
|
|
1142 DEFUN ("coding-system-charset", Fcoding_system_charset, 2, 2, 0, /*
|
|
1143 Return initial charset of CODING-SYSTEM designated to GNUM.
|
|
1144 GNUM allows 0 .. 3.
|
|
1145 */
|
|
1146 (coding_system, gnum))
|
|
1147 {
|
|
1148 coding_system = Fget_coding_system (coding_system);
|
|
1149 CHECK_INT (gnum);
|
|
1150
|
272
|
1151 return coding_system_charset (coding_system, XINT (gnum));
|
259
|
1152 }
|
272
|
1153 #endif /* MULE */
|
259
|
1154
|
|
1155 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
1156 Return the PROP property of CODING-SYSTEM.
|
|
1157 */
|
|
1158 (coding_system, prop))
|
|
1159 {
|
|
1160 int i, ok = 0;
|
|
1161 enum coding_system_type type;
|
|
1162
|
|
1163 coding_system = Fget_coding_system (coding_system);
|
|
1164 CHECK_SYMBOL (prop);
|
|
1165 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
1166
|
|
1167 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
1168 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
1169 {
|
|
1170 ok = 1;
|
|
1171 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
1172 {
|
|
1173 case CODESYS_PROP_ALL_OK:
|
|
1174 break;
|
|
1175 #ifdef MULE
|
|
1176 case CODESYS_PROP_ISO2022:
|
|
1177 if (type != CODESYS_ISO2022)
|
|
1178 signal_simple_error
|
|
1179 ("Property only valid in ISO2022 coding systems",
|
|
1180 prop);
|
|
1181 break;
|
|
1182
|
|
1183 case CODESYS_PROP_CCL:
|
|
1184 if (type != CODESYS_CCL)
|
|
1185 signal_simple_error
|
|
1186 ("Property only valid in CCL coding systems",
|
|
1187 prop);
|
|
1188 break;
|
|
1189 #endif /* MULE */
|
|
1190 default:
|
|
1191 abort ();
|
|
1192 }
|
|
1193 }
|
|
1194
|
|
1195 if (!ok)
|
|
1196 signal_simple_error ("Unrecognized property", prop);
|
|
1197
|
|
1198 if (EQ (prop, Qname))
|
|
1199 return XCODING_SYSTEM_NAME (coding_system);
|
|
1200 else if (EQ (prop, Qtype))
|
|
1201 return Fcoding_system_type (coding_system);
|
|
1202 else if (EQ (prop, Qdoc_string))
|
|
1203 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
1204 else if (EQ (prop, Qmnemonic))
|
|
1205 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
1206 else if (EQ (prop, Qeol_type))
|
|
1207 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
1208 else if (EQ (prop, Qeol_lf))
|
|
1209 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
1210 else if (EQ (prop, Qeol_crlf))
|
|
1211 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
1212 else if (EQ (prop, Qeol_cr))
|
|
1213 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
1214 else if (EQ (prop, Qpost_read_conversion))
|
|
1215 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
1216 else if (EQ (prop, Qpre_write_conversion))
|
|
1217 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
1218 #ifdef MULE
|
|
1219 else if (type == CODESYS_ISO2022)
|
|
1220 {
|
|
1221 if (EQ (prop, Qcharset_g0))
|
|
1222 return coding_system_charset (coding_system, 0);
|
|
1223 else if (EQ (prop, Qcharset_g1))
|
|
1224 return coding_system_charset (coding_system, 1);
|
|
1225 else if (EQ (prop, Qcharset_g2))
|
|
1226 return coding_system_charset (coding_system, 2);
|
|
1227 else if (EQ (prop, Qcharset_g3))
|
|
1228 return coding_system_charset (coding_system, 3);
|
|
1229
|
|
1230 #define FORCE_CHARSET(charset_num) \
|
|
1231 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
1232 (coding_system, charset_num) ? Qt : Qnil)
|
|
1233
|
|
1234 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
1235 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
1236 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
1237 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
1238
|
|
1239 #define LISP_BOOLEAN(prop) \
|
|
1240 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
1241
|
|
1242 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
1243 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
1244 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
1245 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
1246 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
1247 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
1248 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
1249
|
|
1250 else if (EQ (prop, Qinput_charset_conversion))
|
|
1251 return
|
|
1252 unparse_charset_conversion_specs
|
|
1253 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
1254 else if (EQ (prop, Qoutput_charset_conversion))
|
|
1255 return
|
|
1256 unparse_charset_conversion_specs
|
|
1257 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
1258 else
|
|
1259 abort ();
|
|
1260 }
|
|
1261 else if (type == CODESYS_CCL)
|
|
1262 {
|
|
1263 if (EQ (prop, Qdecode))
|
|
1264 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
1265 else if (EQ (prop, Qencode))
|
|
1266 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
1267 else
|
|
1268 abort ();
|
|
1269 }
|
|
1270 #endif /* MULE */
|
|
1271 else
|
|
1272 abort ();
|
|
1273
|
|
1274 return Qnil; /* not reached */
|
|
1275 }
|
|
1276
|
|
1277
|
|
1278 /************************************************************************/
|
|
1279 /* Coding category functions */
|
|
1280 /************************************************************************/
|
|
1281
|
|
1282 static int
|
|
1283 decode_coding_category (Lisp_Object symbol)
|
|
1284 {
|
|
1285 int i;
|
|
1286
|
|
1287 CHECK_SYMBOL (symbol);
|
|
1288 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
1289 if (EQ (coding_category_symbol[i], symbol))
|
|
1290 return i;
|
|
1291
|
|
1292 signal_simple_error ("Unrecognized coding category", symbol);
|
|
1293 return 0; /* not reached */
|
|
1294 }
|
|
1295
|
|
1296 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
1297 Return a list of all recognized coding categories.
|
|
1298 */
|
|
1299 ())
|
|
1300 {
|
|
1301 int i;
|
|
1302 Lisp_Object list = Qnil;
|
|
1303
|
|
1304 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
1305 list = Fcons (coding_category_symbol[i], list);
|
|
1306 return list;
|
|
1307 }
|
|
1308
|
|
1309 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
1310 Change the priority order of the coding categories.
|
|
1311 LIST should be list of coding categories, in descending order of
|
|
1312 priority. Unspecified coding categories will be lower in priority
|
|
1313 than all specified ones, in the same relative order they were in
|
|
1314 previously.
|
|
1315 */
|
|
1316 (list))
|
|
1317 {
|
|
1318 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
1319 int i, j;
|
|
1320 Lisp_Object rest;
|
|
1321
|
|
1322 /* First generate a list that maps coding categories to priorities. */
|
|
1323
|
|
1324 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
1325 category_to_priority[i] = -1;
|
|
1326
|
|
1327 /* Highest priority comes from the specified list. */
|
|
1328 i = 0;
|
|
1329 EXTERNAL_LIST_LOOP (rest, list)
|
|
1330 {
|
|
1331 int cat = decode_coding_category (XCAR (rest));
|
|
1332
|
|
1333 if (category_to_priority[cat] >= 0)
|
|
1334 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
1335 category_to_priority[cat] = i++;
|
|
1336 }
|
|
1337
|
|
1338 /* Now go through the existing categories by priority to retrieve
|
|
1339 the categories not yet specified and preserve their priority
|
|
1340 order. */
|
|
1341 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
1342 {
|
424
|
1343 int cat = fcd->coding_category_by_priority[j];
|
259
|
1344 if (category_to_priority[cat] < 0)
|
|
1345 category_to_priority[cat] = i++;
|
|
1346 }
|
|
1347
|
|
1348 /* Now we need to construct the inverse of the mapping we just
|
|
1349 constructed. */
|
|
1350
|
|
1351 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
424
|
1352 fcd->coding_category_by_priority[category_to_priority[i]] = i;
|
259
|
1353
|
|
1354 /* Phew! That was confusing. */
|
|
1355 return Qnil;
|
|
1356 }
|
|
1357
|
|
1358 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
1359 Return a list of coding categories in descending order of priority.
|
|
1360 */
|
|
1361 ())
|
|
1362 {
|
|
1363 int i;
|
|
1364 Lisp_Object list = Qnil;
|
|
1365
|
|
1366 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
424
|
1367 list = Fcons (coding_category_symbol[fcd->coding_category_by_priority[i]],
|
259
|
1368 list);
|
|
1369 return list;
|
|
1370 }
|
|
1371
|
|
1372 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
1373 Change the coding system associated with a coding category.
|
|
1374 */
|
|
1375 (coding_category, coding_system))
|
|
1376 {
|
|
1377 int cat = decode_coding_category (coding_category);
|
|
1378
|
|
1379 coding_system = Fget_coding_system (coding_system);
|
424
|
1380 fcd->coding_category_system[cat] = coding_system;
|
259
|
1381 return Qnil;
|
|
1382 }
|
|
1383
|
|
1384 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
1385 Return the coding system associated with a coding category.
|
|
1386 */
|
|
1387 (coding_category))
|
|
1388 {
|
|
1389 int cat = decode_coding_category (coding_category);
|
424
|
1390 Lisp_Object sys = fcd->coding_category_system[cat];
|
259
|
1391
|
|
1392 if (!NILP (sys))
|
|
1393 return XCODING_SYSTEM_NAME (sys);
|
|
1394 return Qnil;
|
|
1395 }
|
|
1396
|
|
1397
|
|
1398 /************************************************************************/
|
|
1399 /* Detecting the encoding of data */
|
|
1400 /************************************************************************/
|
|
1401
|
|
1402 struct detection_state
|
|
1403 {
|
412
|
1404 enum eol_type eol_type;
|
259
|
1405 int seen_non_ascii;
|
|
1406 int mask;
|
|
1407 #ifdef MULE
|
|
1408 struct
|
|
1409 {
|
|
1410 int mask;
|
|
1411 int in_second_byte;
|
|
1412 }
|
|
1413 big5;
|
|
1414
|
|
1415 struct
|
|
1416 {
|
|
1417 int mask;
|
|
1418 int in_second_byte;
|
|
1419 }
|
|
1420 shift_jis;
|
|
1421
|
|
1422 struct
|
|
1423 {
|
|
1424 int mask;
|
396
|
1425 int in_byte;
|
|
1426 }
|
|
1427 ucs4;
|
|
1428
|
|
1429 struct
|
|
1430 {
|
|
1431 int mask;
|
|
1432 int in_byte;
|
|
1433 }
|
|
1434 utf8;
|
|
1435
|
|
1436 struct
|
|
1437 {
|
|
1438 int mask;
|
259
|
1439 int initted;
|
|
1440 struct iso2022_decoder iso;
|
|
1441 unsigned int flags;
|
|
1442 int high_byte_count;
|
|
1443 unsigned int saw_single_shift:1;
|
|
1444 }
|
|
1445 iso2022;
|
|
1446 #endif
|
|
1447 struct
|
|
1448 {
|
|
1449 int seen_anything;
|
|
1450 int just_saw_cr;
|
|
1451 }
|
|
1452 eol;
|
|
1453 };
|
|
1454
|
|
1455 static int
|
|
1456 acceptable_control_char_p (int c)
|
|
1457 {
|
|
1458 switch (c)
|
|
1459 {
|
|
1460 /* Allow and ignore control characters that you might
|
|
1461 reasonably see in a text file */
|
|
1462 case '\r':
|
|
1463 case '\n':
|
|
1464 case '\t':
|
|
1465 case 7: /* bell */
|
|
1466 case 8: /* backspace */
|
|
1467 case 11: /* vertical tab */
|
|
1468 case 12: /* form feed */
|
|
1469 case 26: /* MS-DOS C-z junk */
|
|
1470 case 31: /* '^_' -- for info */
|
|
1471 return 1;
|
|
1472 default:
|
|
1473 return 0;
|
|
1474 }
|
|
1475 }
|
|
1476
|
|
1477 static int
|
|
1478 mask_has_at_most_one_bit_p (int mask)
|
|
1479 {
|
|
1480 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
1481 technical interviews */
|
|
1482 return (mask & (mask - 1)) == 0;
|
|
1483 }
|
|
1484
|
412
|
1485 static enum eol_type
|
|
1486 detect_eol_type (struct detection_state *st, CONST unsigned char *src,
|
259
|
1487 unsigned int n)
|
|
1488 {
|
|
1489 int c;
|
|
1490
|
|
1491 while (n--)
|
|
1492 {
|
|
1493 c = *src++;
|
412
|
1494 if (c == '\r')
|
259
|
1495 st->eol.just_saw_cr = 1;
|
|
1496 else
|
412
|
1497 {
|
|
1498 if (c == '\n')
|
|
1499 {
|
|
1500 if (st->eol.just_saw_cr)
|
|
1501 return EOL_CRLF;
|
|
1502 else if (st->eol.seen_anything)
|
|
1503 return EOL_LF;
|
|
1504 }
|
|
1505 else if (st->eol.just_saw_cr)
|
|
1506 return EOL_CR;
|
|
1507 st->eol.just_saw_cr = 0;
|
|
1508 }
|
259
|
1509 st->eol.seen_anything = 1;
|
|
1510 }
|
|
1511
|
|
1512 return EOL_AUTODETECT;
|
|
1513 }
|
|
1514
|
|
1515 /* Attempt to determine the encoding and EOL type of the given text.
|
|
1516 Before calling this function for the first type, you must initialize
|
|
1517 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
1518
|
|
1519 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
1520 not yet known.
|
|
1521
|
|
1522 st->mask holds the determined coding category mask, or ~0 if only
|
|
1523 ASCII has been seen so far.
|
|
1524
|
|
1525 Returns:
|
|
1526
|
|
1527 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
1528 is present in st->mask
|
|
1529 1 == definitive answers are here for both st->eol_type and st->mask
|
|
1530 */
|
|
1531
|
|
1532 static int
|
412
|
1533 detect_coding_type (struct detection_state *st, CONST unsigned char *src,
|
259
|
1534 unsigned int n, int just_do_eol)
|
|
1535 {
|
|
1536 int c;
|
|
1537
|
|
1538 if (st->eol_type == EOL_AUTODETECT)
|
|
1539 st->eol_type = detect_eol_type (st, src, n);
|
|
1540
|
|
1541 if (just_do_eol)
|
|
1542 return st->eol_type != EOL_AUTODETECT;
|
|
1543
|
|
1544 if (!st->seen_non_ascii)
|
|
1545 {
|
|
1546 for (; n; n--, src++)
|
|
1547 {
|
|
1548 c = *src;
|
|
1549 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
1550 {
|
|
1551 st->seen_non_ascii = 1;
|
|
1552 #ifdef MULE
|
|
1553 st->shift_jis.mask = ~0;
|
|
1554 st->big5.mask = ~0;
|
396
|
1555 st->ucs4.mask = ~0;
|
|
1556 st->utf8.mask = ~0;
|
259
|
1557 st->iso2022.mask = ~0;
|
|
1558 #endif
|
|
1559 break;
|
|
1560 }
|
|
1561 }
|
|
1562 }
|
|
1563
|
|
1564 if (!n)
|
|
1565 return 0;
|
|
1566 #ifdef MULE
|
|
1567 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
1568 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
1569 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
1570 st->shift_jis.mask = detect_coding_sjis (st, src, n);
|
|
1571 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
1572 st->big5.mask = detect_coding_big5 (st, src, n);
|
396
|
1573 if (!mask_has_at_most_one_bit_p (st->utf8.mask))
|
|
1574 st->utf8.mask = detect_coding_utf8 (st, src, n);
|
|
1575 if (!mask_has_at_most_one_bit_p (st->ucs4.mask))
|
|
1576 st->ucs4.mask = detect_coding_ucs4 (st, src, n);
|
|
1577
|
|
1578 st->mask
|
|
1579 = st->iso2022.mask | st->shift_jis.mask | st->big5.mask
|
|
1580 | st->utf8.mask | st->ucs4.mask;
|
259
|
1581 #endif
|
|
1582 {
|
|
1583 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
1584 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
1585 return retval && st->eol_type != EOL_AUTODETECT;
|
|
1586 }
|
|
1587 }
|
|
1588
|
|
1589 static Lisp_Object
|
|
1590 coding_system_from_mask (int mask)
|
|
1591 {
|
|
1592 if (mask == ~0)
|
|
1593 {
|
|
1594 /* If the file was entirely or basically ASCII, use the
|
|
1595 default value of `buffer-file-coding-system'. */
|
|
1596 Lisp_Object retval =
|
|
1597 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
1598 if (!NILP (retval))
|
|
1599 {
|
|
1600 retval = Ffind_coding_system (retval);
|
|
1601 if (NILP (retval))
|
|
1602 {
|
|
1603 warn_when_safe
|
|
1604 (Qbad_variable, Qwarning,
|
|
1605 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
1606 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
1607 }
|
|
1608 }
|
|
1609 if (NILP (retval))
|
416
|
1610 retval = Fget_coding_system (Qraw_text);
|
259
|
1611 return retval;
|
|
1612 }
|
|
1613 else
|
|
1614 {
|
|
1615 int i;
|
|
1616 int cat = -1;
|
|
1617 #ifdef MULE
|
|
1618 mask = postprocess_iso2022_mask (mask);
|
|
1619 #endif
|
|
1620 /* Look through the coding categories by priority and find
|
|
1621 the first one that is allowed. */
|
|
1622 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
1623 {
|
424
|
1624 cat = fcd->coding_category_by_priority[i];
|
259
|
1625 if ((mask & (1 << cat)) &&
|
424
|
1626 !NILP (fcd->coding_category_system[cat]))
|
259
|
1627 break;
|
|
1628 }
|
|
1629 if (cat >= 0)
|
424
|
1630 return fcd->coding_category_system[cat];
|
259
|
1631 else
|
416
|
1632 return Fget_coding_system (Qraw_text);
|
259
|
1633 }
|
|
1634 }
|
|
1635
|
|
1636 /* Given a seekable read stream and potential coding system and EOL type
|
|
1637 as specified, do any autodetection that is called for. If the
|
412
|
1638 coding system and/or EOL type are not autodetect, they will be left
|
259
|
1639 alone; but this function will never return an autodetect coding system
|
|
1640 or EOL type.
|
|
1641
|
|
1642 This function does not automatically fetch subsidiary coding systems;
|
|
1643 that should be unnecessary with the explicit eol-type argument. */
|
|
1644
|
|
1645 void
|
|
1646 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
412
|
1647 enum eol_type *eol_type_in_out)
|
259
|
1648 {
|
|
1649 struct detection_state decst;
|
|
1650
|
|
1651 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
1652 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
1653
|
272
|
1654 xzero (decst);
|
259
|
1655 decst.eol_type = *eol_type_in_out;
|
|
1656 decst.mask = ~0;
|
|
1657
|
|
1658 /* If autodetection is called for, do it now. */
|
412
|
1659 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT ||
|
|
1660 *eol_type_in_out == EOL_AUTODETECT)
|
259
|
1661 {
|
424
|
1662 unsigned char random_buffer[4096];
|
|
1663 int nread;
|
|
1664 Lisp_Object coding_system = Qnil;
|
|
1665
|
|
1666 nread = Lstream_read (stream, random_buffer, sizeof (random_buffer));
|
|
1667 if (nread)
|
412
|
1668 {
|
424
|
1669 unsigned char *cp = random_buffer;
|
|
1670
|
|
1671 while (cp < random_buffer + nread)
|
|
1672 {
|
|
1673 if ((*cp++ == 'c') && (cp < random_buffer + nread) &&
|
|
1674 (*cp++ == 'o') && (cp < random_buffer + nread) &&
|
|
1675 (*cp++ == 'd') && (cp < random_buffer + nread) &&
|
|
1676 (*cp++ == 'i') && (cp < random_buffer + nread) &&
|
|
1677 (*cp++ == 'n') && (cp < random_buffer + nread) &&
|
|
1678 (*cp++ == 'g') && (cp < random_buffer + nread) &&
|
|
1679 (*cp++ == ':') && (cp < random_buffer + nread))
|
|
1680 {
|
|
1681 unsigned char coding_system_name[4096 - 6];
|
|
1682 unsigned char *np = coding_system_name;
|
|
1683
|
|
1684 while ( (cp < random_buffer + nread)
|
|
1685 && ((*cp == ' ') || (*cp == '\t')) )
|
|
1686 {
|
|
1687 cp++;
|
|
1688 }
|
|
1689 while ( (cp < random_buffer + nread) &&
|
|
1690 (*cp != ' ') && (*cp != '\t') && (*cp != ';') )
|
|
1691 {
|
|
1692 *np++ = *cp++;
|
|
1693 }
|
|
1694 *np = 0;
|
|
1695 coding_system
|
|
1696 = Ffind_coding_system (intern ((char *) coding_system_name));
|
|
1697 break;
|
|
1698 }
|
|
1699 }
|
|
1700 if (EQ(coding_system, Qnil))
|
|
1701 do{
|
|
1702 if (detect_coding_type (&decst, random_buffer, nread,
|
|
1703 XCODING_SYSTEM_TYPE (*codesys_in_out)
|
|
1704 != CODESYS_AUTODETECT))
|
|
1705 break;
|
|
1706 nread = Lstream_read (stream,
|
|
1707 random_buffer, sizeof (random_buffer));
|
|
1708 if (!nread)
|
|
1709 break;
|
|
1710 } while(1);
|
412
|
1711 }
|
259
|
1712 *eol_type_in_out = decst.eol_type;
|
|
1713 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
424
|
1714 {
|
|
1715 if (EQ(coding_system, Qnil))
|
|
1716 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
1717 else
|
|
1718 *codesys_in_out = coding_system;
|
|
1719 }
|
259
|
1720 }
|
|
1721 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
1722 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
1723 *eol_type_in_out = EOL_LF;
|
|
1724
|
|
1725 Lstream_rewind (stream);
|
|
1726 }
|
|
1727
|
|
1728 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
1729 Detect coding system of the text in the region between START and END.
|
|
1730 Returned a list of possible coding systems ordered by priority.
|
|
1731 If only ASCII characters are found, it returns 'undecided or one of
|
|
1732 its subsidiary coding systems according to a detected end-of-line
|
|
1733 type. Optional arg BUFFER defaults to the current buffer.
|
|
1734 */
|
|
1735 (start, end, buffer))
|
|
1736 {
|
|
1737 Lisp_Object val = Qnil;
|
|
1738 struct buffer *buf = decode_buffer (buffer, 0);
|
|
1739 Bufpos b, e;
|
|
1740 Lisp_Object instream, lb_instream;
|
|
1741 Lstream *istr, *lb_istr;
|
|
1742 struct detection_state decst;
|
|
1743 struct gcpro gcpro1, gcpro2;
|
|
1744
|
|
1745 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
1746 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
1747 lb_istr = XLSTREAM (lb_instream);
|
|
1748 instream = make_encoding_input_stream (lb_istr, Fget_coding_system (Qbinary));
|
|
1749 istr = XLSTREAM (instream);
|
|
1750 GCPRO2 (instream, lb_instream);
|
272
|
1751 xzero (decst);
|
259
|
1752 decst.eol_type = EOL_AUTODETECT;
|
|
1753 decst.mask = ~0;
|
|
1754 while (1)
|
|
1755 {
|
|
1756 unsigned char random_buffer[4096];
|
412
|
1757 int nread = Lstream_read (istr, random_buffer, sizeof (random_buffer));
|
259
|
1758
|
|
1759 if (!nread)
|
|
1760 break;
|
|
1761 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
1762 break;
|
|
1763 }
|
|
1764
|
|
1765 if (decst.mask == ~0)
|
|
1766 val = subsidiary_coding_system (Fget_coding_system (Qundecided),
|
|
1767 decst.eol_type);
|
|
1768 else
|
|
1769 {
|
|
1770 int i;
|
|
1771
|
|
1772 val = Qnil;
|
|
1773 #ifdef MULE
|
|
1774 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
1775 #endif
|
|
1776 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
1777 {
|
424
|
1778 int sys = fcd->coding_category_by_priority[i];
|
259
|
1779 if (decst.mask & (1 << sys))
|
|
1780 {
|
424
|
1781 Lisp_Object codesys = fcd->coding_category_system[sys];
|
259
|
1782 if (!NILP (codesys))
|
|
1783 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
1784 val = Fcons (codesys, val);
|
|
1785 }
|
|
1786 }
|
|
1787 }
|
|
1788 Lstream_close (istr);
|
|
1789 UNGCPRO;
|
|
1790 Lstream_delete (istr);
|
|
1791 Lstream_delete (lb_istr);
|
|
1792 return val;
|
|
1793 }
|
|
1794
|
|
1795
|
|
1796 /************************************************************************/
|
|
1797 /* Converting to internal Mule format ("decoding") */
|
|
1798 /************************************************************************/
|
|
1799
|
|
1800 /* A decoding stream is a stream used for decoding text (i.e.
|
|
1801 converting from some external format to internal format).
|
|
1802 The decoding-stream object keeps track of the actual coding
|
|
1803 stream, the stream that is at the other end, and data that
|
|
1804 needs to be persistent across the lifetime of the stream. */
|
|
1805
|
|
1806 /* Handle the EOL stuff related to just-read-in character C.
|
|
1807 EOL_TYPE is the EOL type of the coding stream.
|
|
1808 FLAGS is the current value of FLAGS in the coding stream, and may
|
|
1809 be modified by this macro. (The macro only looks at the
|
|
1810 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
|
|
1811 bytes are to be written. You need to also define a local goto
|
|
1812 label "label_continue_loop" that is at the end of the main
|
|
1813 character-reading loop.
|
|
1814
|
|
1815 If C is a CR character, then this macro handles it entirely and
|
|
1816 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
1817 anything to DST, and continues normally. You should continue
|
|
1818 processing C normally after this macro. */
|
|
1819
|
|
1820 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
|
|
1821 do { \
|
|
1822 if (c == '\r') \
|
|
1823 { \
|
|
1824 if (eol_type == EOL_CR) \
|
|
1825 Dynarr_add (dst, '\n'); \
|
|
1826 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
1827 Dynarr_add (dst, c); \
|
|
1828 else \
|
|
1829 flags |= CODING_STATE_CR; \
|
|
1830 goto label_continue_loop; \
|
|
1831 } \
|
|
1832 else if (flags & CODING_STATE_CR) \
|
|
1833 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
|
|
1834 if (c != '\n') \
|
|
1835 Dynarr_add (dst, '\r'); \
|
|
1836 flags &= ~CODING_STATE_CR; \
|
|
1837 } \
|
|
1838 } while (0)
|
|
1839
|
|
1840 /* C should be a binary character in the range 0 - 255; convert
|
|
1841 to internal format and add to Dynarr DST. */
|
|
1842
|
|
1843 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
1844 do { \
|
|
1845 if (BYTE_ASCII_P (c)) \
|
|
1846 Dynarr_add (dst, c); \
|
|
1847 else if (BYTE_C1_P (c)) \
|
|
1848 { \
|
|
1849 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
1850 Dynarr_add (dst, c + 0x20); \
|
|
1851 } \
|
|
1852 else \
|
|
1853 { \
|
|
1854 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
|
|
1855 Dynarr_add (dst, c); \
|
|
1856 } \
|
|
1857 } while (0)
|
|
1858
|
|
1859 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
1860 do { \
|
|
1861 if (ch) \
|
|
1862 { \
|
|
1863 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
1864 ch = 0; \
|
|
1865 } \
|
|
1866 } while (0)
|
|
1867
|
|
1868 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
|
|
1869 do { \
|
398
|
1870 if (flags & CODING_STATE_END) \
|
|
1871 { \
|
|
1872 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
1873 if (flags & CODING_STATE_CR) \
|
|
1874 Dynarr_add (dst, '\r'); \
|
|
1875 } \
|
259
|
1876 } while (0)
|
|
1877
|
|
1878 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
1879
|
|
1880 struct decoding_stream
|
|
1881 {
|
|
1882 /* Coding system that governs the conversion. */
|
396
|
1883 Lisp_Coding_System *codesys;
|
259
|
1884
|
|
1885 /* Stream that we read the encoded data from or
|
|
1886 write the decoded data to. */
|
|
1887 Lstream *other_end;
|
|
1888
|
|
1889 /* If we are reading, then we can return only a fixed amount of
|
|
1890 data, so if the conversion resulted in too much data, we store it
|
|
1891 here for retrieval the next time around. */
|
|
1892 unsigned_char_dynarr *runoff;
|
|
1893
|
|
1894 /* FLAGS holds flags indicating the current state of the decoding.
|
|
1895 Some of these flags are dependent on the coding system. */
|
|
1896 unsigned int flags;
|
|
1897
|
|
1898 /* CH holds a partially built-up character. Since we only deal
|
|
1899 with one- and two-byte characters at the moment, we only use
|
|
1900 this to store the first byte of a two-byte character. */
|
|
1901 unsigned int ch;
|
|
1902
|
|
1903 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
1904 currently applies. We need to keep this separate from the
|
|
1905 EOL type stored in CODESYS because the latter might indicate
|
|
1906 automatic EOL-type detection while the former will always
|
|
1907 indicate a particular EOL type. */
|
412
|
1908 enum eol_type eol_type;
|
259
|
1909 #ifdef MULE
|
|
1910 /* Additional ISO2022 information. We define the structure above
|
|
1911 because it's also needed by the detection routines. */
|
|
1912 struct iso2022_decoder iso2022;
|
|
1913
|
|
1914 /* Additional information (the state of the running CCL program)
|
|
1915 used by the CCL decoder. */
|
|
1916 struct ccl_program ccl;
|
424
|
1917
|
|
1918 /* counter for UTF-8 or UCS-4 */
|
|
1919 unsigned char counter;
|
259
|
1920 #endif
|
|
1921 struct detection_state decst;
|
|
1922 };
|
|
1923
|
412
|
1924 static int decoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
1925 static int decoding_writer (Lstream *stream, CONST unsigned char *data, size_t size);
|
259
|
1926 static int decoding_rewinder (Lstream *stream);
|
|
1927 static int decoding_seekable_p (Lstream *stream);
|
|
1928 static int decoding_flusher (Lstream *stream);
|
|
1929 static int decoding_closer (Lstream *stream);
|
|
1930
|
424
|
1931 static Lisp_Object decoding_marker (Lisp_Object stream);
|
259
|
1932
|
|
1933 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
1934 sizeof (struct decoding_stream));
|
|
1935
|
|
1936 static Lisp_Object
|
424
|
1937 decoding_marker (Lisp_Object stream)
|
259
|
1938 {
|
|
1939 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
1940 Lisp_Object str_obj;
|
|
1941
|
|
1942 /* We do not need to mark the coding systems or charsets stored
|
|
1943 within the stream because they are stored in a global list
|
|
1944 and automatically marked. */
|
|
1945
|
|
1946 XSETLSTREAM (str_obj, str);
|
424
|
1947 mark_object (str_obj);
|
259
|
1948 if (str->imp->marker)
|
424
|
1949 return (str->imp->marker) (str_obj);
|
259
|
1950 else
|
|
1951 return Qnil;
|
|
1952 }
|
|
1953
|
|
1954 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
1955 so we read data from the other end, decode it, and store it into DATA. */
|
|
1956
|
412
|
1957 static int
|
272
|
1958 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
259
|
1959 {
|
|
1960 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
1961 unsigned char *orig_data = data;
|
412
|
1962 int read_size;
|
259
|
1963 int error_occurred = 0;
|
|
1964
|
|
1965 /* We need to interface to mule_decode(), which expects to take some
|
|
1966 amount of data and store the result into a Dynarr. We have
|
|
1967 mule_decode() store into str->runoff, and take data from there
|
|
1968 as necessary. */
|
|
1969
|
|
1970 /* We loop until we have enough data, reading chunks from the other
|
|
1971 end and decoding it. */
|
|
1972 while (1)
|
|
1973 {
|
|
1974 /* Take data from the runoff if we can. Make sure to take at
|
|
1975 most SIZE bytes, and delete the data from the runoff. */
|
|
1976 if (Dynarr_length (str->runoff) > 0)
|
|
1977 {
|
272
|
1978 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
|
259
|
1979 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
1980 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
1981 data += chunk;
|
|
1982 size -= chunk;
|
|
1983 }
|
|
1984
|
|
1985 if (size == 0)
|
|
1986 break; /* No more room for data */
|
|
1987
|
|
1988 if (str->flags & CODING_STATE_END)
|
|
1989 /* This means that on the previous iteration, we hit the EOF on
|
|
1990 the other end. We loop once more so that mule_decode() can
|
|
1991 output any final stuff it may be holding, or any "go back
|
|
1992 to a sane state" escape sequences. (This latter makes sense
|
|
1993 during encoding.) */
|
|
1994 break;
|
|
1995
|
|
1996 /* Exhausted the runoff, so get some more. DATA has at least
|
|
1997 SIZE bytes left of storage in it, so it's OK to read directly
|
|
1998 into it. (We'll be overwriting above, after we've decoded it
|
|
1999 into the runoff.) */
|
|
2000 read_size = Lstream_read (str->other_end, data, size);
|
|
2001 if (read_size < 0)
|
|
2002 {
|
|
2003 error_occurred = 1;
|
|
2004 break;
|
|
2005 }
|
|
2006 if (read_size == 0)
|
|
2007 /* There might be some more end data produced in the translation.
|
|
2008 See the comment above. */
|
|
2009 str->flags |= CODING_STATE_END;
|
|
2010 mule_decode (stream, data, str->runoff, read_size);
|
|
2011 }
|
|
2012
|
|
2013 if (data - orig_data == 0)
|
|
2014 return error_occurred ? -1 : 0;
|
|
2015 else
|
|
2016 return data - orig_data;
|
|
2017 }
|
|
2018
|
412
|
2019 static int
|
|
2020 decoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
259
|
2021 {
|
|
2022 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
412
|
2023 int retval;
|
259
|
2024
|
|
2025 /* Decode all our data into the runoff, and then attempt to write
|
|
2026 it all out to the other end. Remove whatever chunk we succeeded
|
|
2027 in writing. */
|
|
2028 mule_decode (stream, data, str->runoff, size);
|
|
2029 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
2030 Dynarr_length (str->runoff));
|
|
2031 if (retval > 0)
|
|
2032 Dynarr_delete_many (str->runoff, 0, retval);
|
|
2033 /* Do NOT return retval. The return value indicates how much
|
|
2034 of the incoming data was written, not how many bytes were
|
|
2035 written. */
|
|
2036 return size;
|
|
2037 }
|
|
2038
|
|
2039 static void
|
|
2040 reset_decoding_stream (struct decoding_stream *str)
|
|
2041 {
|
|
2042 #ifdef MULE
|
|
2043 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
2044 {
|
272
|
2045 Lisp_Object coding_system;
|
259
|
2046 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
2047 reset_iso2022 (coding_system, &str->iso2022);
|
|
2048 }
|
|
2049 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
2050 {
|
|
2051 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
|
|
2052 }
|
424
|
2053 str->counter = 0;
|
272
|
2054 #endif /* MULE */
|
259
|
2055 str->flags = str->ch = 0;
|
|
2056 }
|
|
2057
|
|
2058 static int
|
|
2059 decoding_rewinder (Lstream *stream)
|
|
2060 {
|
|
2061 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
2062 reset_decoding_stream (str);
|
|
2063 Dynarr_reset (str->runoff);
|
|
2064 return Lstream_rewind (str->other_end);
|
|
2065 }
|
|
2066
|
|
2067 static int
|
|
2068 decoding_seekable_p (Lstream *stream)
|
|
2069 {
|
|
2070 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
2071 return Lstream_seekable_p (str->other_end);
|
|
2072 }
|
|
2073
|
|
2074 static int
|
|
2075 decoding_flusher (Lstream *stream)
|
|
2076 {
|
|
2077 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
2078 return Lstream_flush (str->other_end);
|
|
2079 }
|
|
2080
|
|
2081 static int
|
|
2082 decoding_closer (Lstream *stream)
|
|
2083 {
|
|
2084 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
2085 if (stream->flags & LSTREAM_FL_WRITE)
|
|
2086 {
|
|
2087 str->flags |= CODING_STATE_END;
|
|
2088 decoding_writer (stream, 0, 0);
|
|
2089 }
|
|
2090 Dynarr_free (str->runoff);
|
|
2091 #ifdef MULE
|
396
|
2092 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
2093 if (str->iso2022.composite_chars)
|
|
2094 Dynarr_free (str->iso2022.composite_chars);
|
|
2095 #endif
|
396
|
2096 #endif
|
259
|
2097 return Lstream_close (str->other_end);
|
|
2098 }
|
|
2099
|
|
2100 Lisp_Object
|
|
2101 decoding_stream_coding_system (Lstream *stream)
|
|
2102 {
|
272
|
2103 Lisp_Object coding_system;
|
259
|
2104 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
2105
|
|
2106 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
2107 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
2108 }
|
|
2109
|
|
2110 void
|
|
2111 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
2112 {
|
396
|
2113 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
259
|
2114 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
2115 str->codesys = cs;
|
|
2116 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
2117 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
2118 reset_decoding_stream (str);
|
|
2119 }
|
|
2120
|
|
2121 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
2122 stream for writing, no automatic code detection will be performed.
|
|
2123 The reason for this is that automatic code detection requires a
|
|
2124 seekable input. Things will also fail if you open a decoding
|
|
2125 stream for reading using a non-fully-specified coding system and
|
|
2126 a non-seekable input stream. */
|
|
2127
|
|
2128 static Lisp_Object
|
|
2129 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
412
|
2130 CONST char *mode)
|
259
|
2131 {
|
|
2132 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
2133 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
2134 Lisp_Object obj;
|
|
2135
|
272
|
2136 xzero (*str);
|
259
|
2137 str->other_end = stream;
|
|
2138 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
|
|
2139 str->eol_type = EOL_AUTODETECT;
|
|
2140 if (!strcmp (mode, "r")
|
|
2141 && Lstream_seekable_p (stream))
|
|
2142 /* We can determine the coding system now. */
|
|
2143 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
2144 set_decoding_stream_coding_system (lstr, codesys);
|
|
2145 str->decst.eol_type = str->eol_type;
|
|
2146 str->decst.mask = ~0;
|
|
2147 XSETLSTREAM (obj, lstr);
|
|
2148 return obj;
|
|
2149 }
|
|
2150
|
|
2151 Lisp_Object
|
|
2152 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
2153 {
|
|
2154 return make_decoding_stream_1 (stream, codesys, "r");
|
|
2155 }
|
|
2156
|
|
2157 Lisp_Object
|
|
2158 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
2159 {
|
|
2160 return make_decoding_stream_1 (stream, codesys, "w");
|
|
2161 }
|
|
2162
|
|
2163 /* Note: the decode_coding_* functions all take the same
|
|
2164 arguments as mule_decode(), which is to say some SRC data of
|
|
2165 size N, which is to be stored into dynamic array DST.
|
|
2166 DECODING is the stream within which the decoding is
|
|
2167 taking place, but no data is actually read from or
|
|
2168 written to that stream; that is handled in decoding_reader()
|
|
2169 or decoding_writer(). This allows the same functions to
|
|
2170 be used for both reading and writing. */
|
|
2171
|
|
2172 static void
|
412
|
2173 mule_decode (Lstream *decoding, CONST unsigned char *src,
|
259
|
2174 unsigned_char_dynarr *dst, unsigned int n)
|
|
2175 {
|
|
2176 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
2177
|
|
2178 /* If necessary, do encoding-detection now. We do this when
|
|
2179 we're a writing stream or a non-seekable reading stream,
|
|
2180 meaning that we can't just process the whole input,
|
|
2181 rewind, and start over. */
|
|
2182
|
|
2183 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
2184 str->eol_type == EOL_AUTODETECT)
|
|
2185 {
|
272
|
2186 Lisp_Object codesys;
|
259
|
2187
|
|
2188 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
2189 detect_coding_type (&str->decst, src, n,
|
|
2190 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
2191 CODESYS_AUTODETECT);
|
|
2192 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
2193 str->decst.mask != ~0)
|
|
2194 /* #### This is cheesy. What we really ought to do is
|
|
2195 buffer up a certain amount of data so as to get a
|
|
2196 less random result. */
|
|
2197 codesys = coding_system_from_mask (str->decst.mask);
|
|
2198 str->eol_type = str->decst.eol_type;
|
|
2199 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
2200 {
|
|
2201 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
2202 If we erase it, bad things might happen. */
|
|
2203 int was_end = str->flags & CODING_STATE_END;
|
|
2204 set_decoding_stream_coding_system (decoding, codesys);
|
|
2205 if (was_end)
|
|
2206 str->flags |= CODING_STATE_END;
|
|
2207 }
|
|
2208 }
|
|
2209
|
|
2210 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
2211 {
|
|
2212 #ifdef DEBUG_XEMACS
|
|
2213 case CODESYS_INTERNAL:
|
|
2214 Dynarr_add_many (dst, src, n);
|
|
2215 break;
|
|
2216 #endif
|
|
2217 case CODESYS_AUTODETECT:
|
|
2218 /* If we got this far and still haven't decided on the coding
|
|
2219 system, then do no conversion. */
|
|
2220 case CODESYS_NO_CONVERSION:
|
|
2221 decode_coding_no_conversion (decoding, src, dst, n);
|
|
2222 break;
|
|
2223 #ifdef MULE
|
|
2224 case CODESYS_SHIFT_JIS:
|
|
2225 decode_coding_sjis (decoding, src, dst, n);
|
|
2226 break;
|
|
2227 case CODESYS_BIG5:
|
|
2228 decode_coding_big5 (decoding, src, dst, n);
|
|
2229 break;
|
396
|
2230 case CODESYS_UCS4:
|
|
2231 decode_coding_ucs4 (decoding, src, dst, n);
|
|
2232 break;
|
|
2233 case CODESYS_UTF8:
|
|
2234 decode_coding_utf8 (decoding, src, dst, n);
|
|
2235 break;
|
259
|
2236 case CODESYS_CCL:
|
422
|
2237 str->ccl.last_block = str->flags & CODING_STATE_END;
|
418
|
2238 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_DECODING);
|
259
|
2239 break;
|
|
2240 case CODESYS_ISO2022:
|
|
2241 decode_coding_iso2022 (decoding, src, dst, n);
|
|
2242 break;
|
272
|
2243 #endif /* MULE */
|
259
|
2244 default:
|
|
2245 abort ();
|
|
2246 }
|
|
2247 }
|
|
2248
|
|
2249 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
2250 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
2251 This is useful if you've read in encoded text from a file without decoding
|
|
2252 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
2253 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
2254 Return length of decoded text.
|
|
2255 BUFFER defaults to the current buffer if unspecified.
|
|
2256 */
|
|
2257 (start, end, coding_system, buffer))
|
|
2258 {
|
|
2259 Bufpos b, e;
|
|
2260 struct buffer *buf = decode_buffer (buffer, 0);
|
|
2261 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
2262 Lstream *istr, *ostr;
|
|
2263 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
2264
|
|
2265 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
2266
|
|
2267 barf_if_buffer_read_only (buf, b, e);
|
|
2268
|
|
2269 coding_system = Fget_coding_system (coding_system);
|
|
2270 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
2271 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
2272 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
2273 coding_system);
|
|
2274 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
2275 Fget_coding_system (Qbinary));
|
|
2276 istr = XLSTREAM (instream);
|
|
2277 ostr = XLSTREAM (outstream);
|
|
2278 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
|
|
2279
|
|
2280 /* The chain of streams looks like this:
|
|
2281
|
|
2282 [BUFFER] <----- send through
|
|
2283 ------> [ENCODE AS BINARY]
|
|
2284 ------> [DECODE AS SPECIFIED]
|
|
2285 ------> [BUFFER]
|
|
2286 */
|
|
2287
|
|
2288 while (1)
|
|
2289 {
|
|
2290 char tempbuf[1024]; /* some random amount */
|
|
2291 Bufpos newpos, even_newer_pos;
|
|
2292 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
412
|
2293 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
259
|
2294
|
|
2295 if (!size_in_bytes)
|
|
2296 break;
|
|
2297 newpos = lisp_buffer_stream_startpos (istr);
|
|
2298 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
2299 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
2300 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
2301 even_newer_pos, 0);
|
|
2302 }
|
|
2303 Lstream_close (istr);
|
|
2304 Lstream_close (ostr);
|
|
2305 UNGCPRO;
|
|
2306 Lstream_delete (istr);
|
|
2307 Lstream_delete (ostr);
|
|
2308 Lstream_delete (XLSTREAM (de_outstream));
|
|
2309 Lstream_delete (XLSTREAM (lb_outstream));
|
|
2310 return Qnil;
|
|
2311 }
|
|
2312
|
|
2313
|
|
2314 /************************************************************************/
|
|
2315 /* Converting to an external encoding ("encoding") */
|
|
2316 /************************************************************************/
|
|
2317
|
|
2318 /* An encoding stream is an output stream. When you create the
|
|
2319 stream, you specify the coding system that governs the encoding
|
|
2320 and another stream that the resulting encoded data is to be
|
|
2321 sent to, and then start sending data to it. */
|
|
2322
|
|
2323 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
2324
|
|
2325 struct encoding_stream
|
|
2326 {
|
|
2327 /* Coding system that governs the conversion. */
|
396
|
2328 Lisp_Coding_System *codesys;
|
259
|
2329
|
|
2330 /* Stream that we read the encoded data from or
|
|
2331 write the decoded data to. */
|
|
2332 Lstream *other_end;
|
|
2333
|
|
2334 /* If we are reading, then we can return only a fixed amount of
|
|
2335 data, so if the conversion resulted in too much data, we store it
|
|
2336 here for retrieval the next time around. */
|
|
2337 unsigned_char_dynarr *runoff;
|
|
2338
|
|
2339 /* FLAGS holds flags indicating the current state of the encoding.
|
|
2340 Some of these flags are dependent on the coding system. */
|
|
2341 unsigned int flags;
|
|
2342
|
|
2343 /* CH holds a partially built-up character. Since we only deal
|
|
2344 with one- and two-byte characters at the moment, we only use
|
|
2345 this to store the first byte of a two-byte character. */
|
|
2346 unsigned int ch;
|
|
2347 #ifdef MULE
|
|
2348 /* Additional information used by the ISO2022 encoder. */
|
|
2349 struct
|
|
2350 {
|
|
2351 /* CHARSET holds the character sets currently assigned to the G0
|
|
2352 through G3 registers. It is initialized from the array
|
|
2353 INITIAL_CHARSET in CODESYS. */
|
|
2354 Lisp_Object charset[4];
|
|
2355
|
|
2356 /* Which registers are currently invoked into the left (GL) and
|
|
2357 right (GR) halves of the 8-bit encoding space? */
|
|
2358 int register_left, register_right;
|
|
2359
|
|
2360 /* Whether we need to explicitly designate the charset in the
|
|
2361 G? register before using it. It is initialized from the
|
|
2362 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
2363 unsigned char force_charset_on_output[4];
|
|
2364
|
|
2365 /* Other state variables that need to be preserved across
|
|
2366 invocations. */
|
|
2367 Lisp_Object current_charset;
|
|
2368 int current_half;
|
|
2369 int current_char_boundary;
|
|
2370 } iso2022;
|
|
2371
|
|
2372 /* Additional information (the state of the running CCL program)
|
|
2373 used by the CCL encoder. */
|
|
2374 struct ccl_program ccl;
|
272
|
2375 #endif /* MULE */
|
259
|
2376 };
|
|
2377
|
412
|
2378 static int encoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
2379 static int encoding_writer (Lstream *stream, CONST unsigned char *data,
|
|
2380 size_t size);
|
259
|
2381 static int encoding_rewinder (Lstream *stream);
|
|
2382 static int encoding_seekable_p (Lstream *stream);
|
|
2383 static int encoding_flusher (Lstream *stream);
|
|
2384 static int encoding_closer (Lstream *stream);
|
|
2385
|
424
|
2386 static Lisp_Object encoding_marker (Lisp_Object stream);
|
259
|
2387
|
|
2388 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
2389 sizeof (struct encoding_stream));
|
|
2390
|
|
2391 static Lisp_Object
|
424
|
2392 encoding_marker (Lisp_Object stream)
|
259
|
2393 {
|
|
2394 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
2395 Lisp_Object str_obj;
|
|
2396
|
|
2397 /* We do not need to mark the coding systems or charsets stored
|
|
2398 within the stream because they are stored in a global list
|
|
2399 and automatically marked. */
|
|
2400
|
|
2401 XSETLSTREAM (str_obj, str);
|
424
|
2402 mark_object (str_obj);
|
259
|
2403 if (str->imp->marker)
|
424
|
2404 return (str->imp->marker) (str_obj);
|
259
|
2405 else
|
|
2406 return Qnil;
|
|
2407 }
|
|
2408
|
|
2409 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
2410 so we read data from the other end, encode it, and store it into DATA. */
|
|
2411
|
412
|
2412 static int
|
272
|
2413 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
259
|
2414 {
|
|
2415 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
2416 unsigned char *orig_data = data;
|
412
|
2417 int read_size;
|
259
|
2418 int error_occurred = 0;
|
|
2419
|
|
2420 /* We need to interface to mule_encode(), which expects to take some
|
|
2421 amount of data and store the result into a Dynarr. We have
|
|
2422 mule_encode() store into str->runoff, and take data from there
|
|
2423 as necessary. */
|
|
2424
|
|
2425 /* We loop until we have enough data, reading chunks from the other
|
|
2426 end and encoding it. */
|
|
2427 while (1)
|
|
2428 {
|
|
2429 /* Take data from the runoff if we can. Make sure to take at
|
|
2430 most SIZE bytes, and delete the data from the runoff. */
|
|
2431 if (Dynarr_length (str->runoff) > 0)
|
|
2432 {
|
272
|
2433 int chunk = min ((int) size, Dynarr_length (str->runoff));
|
259
|
2434 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
2435 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
2436 data += chunk;
|
|
2437 size -= chunk;
|
|
2438 }
|
|
2439
|
|
2440 if (size == 0)
|
|
2441 break; /* No more room for data */
|
|
2442
|
|
2443 if (str->flags & CODING_STATE_END)
|
|
2444 /* This means that on the previous iteration, we hit the EOF on
|
|
2445 the other end. We loop once more so that mule_encode() can
|
|
2446 output any final stuff it may be holding, or any "go back
|
|
2447 to a sane state" escape sequences. (This latter makes sense
|
|
2448 during encoding.) */
|
|
2449 break;
|
|
2450
|
|
2451 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
2452 left of storage in it, so it's OK to read directly into it.
|
|
2453 (We'll be overwriting above, after we've encoded it into the
|
|
2454 runoff.) */
|
|
2455 read_size = Lstream_read (str->other_end, data, size);
|
|
2456 if (read_size < 0)
|
|
2457 {
|
|
2458 error_occurred = 1;
|
|
2459 break;
|
|
2460 }
|
|
2461 if (read_size == 0)
|
|
2462 /* There might be some more end data produced in the translation.
|
|
2463 See the comment above. */
|
|
2464 str->flags |= CODING_STATE_END;
|
|
2465 mule_encode (stream, data, str->runoff, read_size);
|
|
2466 }
|
|
2467
|
|
2468 if (data == orig_data)
|
|
2469 return error_occurred ? -1 : 0;
|
|
2470 else
|
|
2471 return data - orig_data;
|
|
2472 }
|
|
2473
|
412
|
2474 static int
|
|
2475 encoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
259
|
2476 {
|
|
2477 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
412
|
2478 int retval;
|
259
|
2479
|
|
2480 /* Encode all our data into the runoff, and then attempt to write
|
|
2481 it all out to the other end. Remove whatever chunk we succeeded
|
|
2482 in writing. */
|
|
2483 mule_encode (stream, data, str->runoff, size);
|
|
2484 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
2485 Dynarr_length (str->runoff));
|
|
2486 if (retval > 0)
|
|
2487 Dynarr_delete_many (str->runoff, 0, retval);
|
|
2488 /* Do NOT return retval. The return value indicates how much
|
|
2489 of the incoming data was written, not how many bytes were
|
|
2490 written. */
|
|
2491 return size;
|
|
2492 }
|
|
2493
|
|
2494 static void
|
|
2495 reset_encoding_stream (struct encoding_stream *str)
|
|
2496 {
|
272
|
2497 #ifdef MULE
|
259
|
2498 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
2499 {
|
|
2500 case CODESYS_ISO2022:
|
|
2501 {
|
|
2502 int i;
|
|
2503
|
|
2504 for (i = 0; i < 4; i++)
|
|
2505 {
|
|
2506 str->iso2022.charset[i] =
|
|
2507 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
2508 str->iso2022.force_charset_on_output[i] =
|
|
2509 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
2510 }
|
|
2511 str->iso2022.register_left = 0;
|
|
2512 str->iso2022.register_right = 1;
|
|
2513 str->iso2022.current_charset = Qnil;
|
|
2514 str->iso2022.current_half = 0;
|
|
2515 str->iso2022.current_char_boundary = 1;
|
|
2516 break;
|
|
2517 }
|
|
2518 case CODESYS_CCL:
|
|
2519 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
|
|
2520 break;
|
|
2521 default:
|
|
2522 break;
|
|
2523 }
|
272
|
2524 #endif /* MULE */
|
259
|
2525
|
|
2526 str->flags = str->ch = 0;
|
|
2527 }
|
|
2528
|
|
2529 static int
|
|
2530 encoding_rewinder (Lstream *stream)
|
|
2531 {
|
|
2532 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
2533 reset_encoding_stream (str);
|
|
2534 Dynarr_reset (str->runoff);
|
|
2535 return Lstream_rewind (str->other_end);
|
|
2536 }
|
|
2537
|
|
2538 static int
|
|
2539 encoding_seekable_p (Lstream *stream)
|
|
2540 {
|
|
2541 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
2542 return Lstream_seekable_p (str->other_end);
|
|
2543 }
|
|
2544
|
|
2545 static int
|
|
2546 encoding_flusher (Lstream *stream)
|
|
2547 {
|
|
2548 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
2549 return Lstream_flush (str->other_end);
|
|
2550 }
|
|
2551
|
|
2552 static int
|
|
2553 encoding_closer (Lstream *stream)
|
|
2554 {
|
|
2555 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
2556 if (stream->flags & LSTREAM_FL_WRITE)
|
|
2557 {
|
|
2558 str->flags |= CODING_STATE_END;
|
|
2559 encoding_writer (stream, 0, 0);
|
|
2560 }
|
|
2561 Dynarr_free (str->runoff);
|
|
2562 return Lstream_close (str->other_end);
|
|
2563 }
|
|
2564
|
|
2565 Lisp_Object
|
|
2566 encoding_stream_coding_system (Lstream *stream)
|
|
2567 {
|
272
|
2568 Lisp_Object coding_system;
|
259
|
2569 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
2570
|
|
2571 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
2572 return coding_system;
|
|
2573 }
|
|
2574
|
|
2575 void
|
|
2576 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
2577 {
|
396
|
2578 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
259
|
2579 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
2580 str->codesys = cs;
|
|
2581 reset_encoding_stream (str);
|
|
2582 }
|
|
2583
|
|
2584 static Lisp_Object
|
|
2585 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
412
|
2586 CONST char *mode)
|
259
|
2587 {
|
|
2588 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
2589 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
2590 Lisp_Object obj;
|
|
2591
|
272
|
2592 xzero (*str);
|
259
|
2593 str->runoff = Dynarr_new (unsigned_char);
|
|
2594 str->other_end = stream;
|
|
2595 set_encoding_stream_coding_system (lstr, codesys);
|
|
2596 XSETLSTREAM (obj, lstr);
|
|
2597 return obj;
|
|
2598 }
|
|
2599
|
|
2600 Lisp_Object
|
|
2601 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
2602 {
|
|
2603 return make_encoding_stream_1 (stream, codesys, "r");
|
|
2604 }
|
|
2605
|
|
2606 Lisp_Object
|
|
2607 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
2608 {
|
|
2609 return make_encoding_stream_1 (stream, codesys, "w");
|
|
2610 }
|
|
2611
|
|
2612 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
2613 external format, according to the encoding stream ENCODING.
|
|
2614 Store the encoded data into DST. */
|
|
2615
|
|
2616 static void
|
412
|
2617 mule_encode (Lstream *encoding, CONST unsigned char *src,
|
259
|
2618 unsigned_char_dynarr *dst, unsigned int n)
|
|
2619 {
|
|
2620 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
2621
|
|
2622 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
2623 {
|
|
2624 #ifdef DEBUG_XEMACS
|
|
2625 case CODESYS_INTERNAL:
|
|
2626 Dynarr_add_many (dst, src, n);
|
|
2627 break;
|
|
2628 #endif
|
|
2629 case CODESYS_AUTODETECT:
|
|
2630 /* If we got this far and still haven't decided on the coding
|
|
2631 system, then do no conversion. */
|
|
2632 case CODESYS_NO_CONVERSION:
|
|
2633 encode_coding_no_conversion (encoding, src, dst, n);
|
|
2634 break;
|
|
2635 #ifdef MULE
|
|
2636 case CODESYS_SHIFT_JIS:
|
|
2637 encode_coding_sjis (encoding, src, dst, n);
|
|
2638 break;
|
|
2639 case CODESYS_BIG5:
|
|
2640 encode_coding_big5 (encoding, src, dst, n);
|
|
2641 break;
|
396
|
2642 case CODESYS_UCS4:
|
|
2643 encode_coding_ucs4 (encoding, src, dst, n);
|
|
2644 break;
|
|
2645 case CODESYS_UTF8:
|
|
2646 encode_coding_utf8 (encoding, src, dst, n);
|
|
2647 break;
|
259
|
2648 case CODESYS_CCL:
|
422
|
2649 str->ccl.last_block = str->flags & CODING_STATE_END;
|
418
|
2650 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_ENCODING);
|
259
|
2651 break;
|
|
2652 case CODESYS_ISO2022:
|
|
2653 encode_coding_iso2022 (encoding, src, dst, n);
|
|
2654 break;
|
|
2655 #endif /* MULE */
|
|
2656 default:
|
|
2657 abort ();
|
|
2658 }
|
|
2659 }
|
|
2660
|
|
2661 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
2662 Encode the text between START and END using CODING-SYSTEM.
|
|
2663 This will, for example, convert Japanese characters into stuff such as
|
|
2664 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
2665 text. BUFFER defaults to the current buffer if unspecified.
|
|
2666 */
|
|
2667 (start, end, coding_system, buffer))
|
|
2668 {
|
|
2669 Bufpos b, e;
|
|
2670 struct buffer *buf = decode_buffer (buffer, 0);
|
|
2671 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
2672 Lstream *istr, *ostr;
|
|
2673 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
2674
|
|
2675 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
2676
|
|
2677 barf_if_buffer_read_only (buf, b, e);
|
|
2678
|
|
2679 coding_system = Fget_coding_system (coding_system);
|
|
2680 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
2681 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
2682 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
2683 Fget_coding_system (Qbinary));
|
|
2684 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
2685 coding_system);
|
|
2686 istr = XLSTREAM (instream);
|
|
2687 ostr = XLSTREAM (outstream);
|
|
2688 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
|
|
2689 /* The chain of streams looks like this:
|
|
2690
|
|
2691 [BUFFER] <----- send through
|
|
2692 ------> [ENCODE AS SPECIFIED]
|
|
2693 ------> [DECODE AS BINARY]
|
|
2694 ------> [BUFFER]
|
|
2695 */
|
|
2696 while (1)
|
|
2697 {
|
|
2698 char tempbuf[1024]; /* some random amount */
|
|
2699 Bufpos newpos, even_newer_pos;
|
|
2700 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
412
|
2701 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
259
|
2702
|
|
2703 if (!size_in_bytes)
|
|
2704 break;
|
|
2705 newpos = lisp_buffer_stream_startpos (istr);
|
|
2706 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
2707 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
2708 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
2709 even_newer_pos, 0);
|
|
2710 }
|
|
2711
|
|
2712 {
|
|
2713 Charcount retlen =
|
|
2714 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
2715 Lstream_close (istr);
|
|
2716 Lstream_close (ostr);
|
|
2717 UNGCPRO;
|
|
2718 Lstream_delete (istr);
|
|
2719 Lstream_delete (ostr);
|
|
2720 Lstream_delete (XLSTREAM (de_outstream));
|
|
2721 Lstream_delete (XLSTREAM (lb_outstream));
|
|
2722 return make_int (retlen);
|
|
2723 }
|
|
2724 }
|
|
2725
|
|
2726 #ifdef MULE
|
|
2727
|
|
2728 /************************************************************************/
|
|
2729 /* Shift-JIS methods */
|
|
2730 /************************************************************************/
|
|
2731
|
|
2732 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
2733 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
396
|
2734 as is. A character of JISX0201-Kana (DIMENSION1_CHARS94 character set) is
|
259
|
2735 encoded by "position-code + 0x80". A character of JISX0208
|
396
|
2736 (DIMENSION2_CHARS94 character set) is encoded in 2-byte but two
|
259
|
2737 position-codes are divided and shifted so that it fit in the range
|
|
2738 below.
|
|
2739
|
|
2740 --- CODE RANGE of Shift-JIS ---
|
|
2741 (character set) (range)
|
|
2742 ASCII 0x00 .. 0x7F
|
|
2743 JISX0201-Kana 0xA0 .. 0xDF
|
|
2744 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
2745 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
2746 -------------------------------
|
|
2747
|
|
2748 */
|
|
2749
|
|
2750 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
2751
|
|
2752 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
|
|
2753 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
2754
|
|
2755 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
2756
|
|
2757 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
|
|
2758 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
2759
|
|
2760 #define BYTE_SJIS_KATAKANA_P(c) \
|
|
2761 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
2762
|
|
2763 static int
|
412
|
2764 detect_coding_sjis (struct detection_state *st, CONST unsigned char *src,
|
259
|
2765 unsigned int n)
|
|
2766 {
|
|
2767 int c;
|
|
2768
|
|
2769 while (n--)
|
|
2770 {
|
|
2771 c = *src++;
|
|
2772 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
2773 return 0;
|
|
2774 if (st->shift_jis.in_second_byte)
|
|
2775 {
|
|
2776 st->shift_jis.in_second_byte = 0;
|
|
2777 if (c < 0x40)
|
|
2778 return 0;
|
|
2779 }
|
|
2780 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
2781 st->shift_jis.in_second_byte = 1;
|
|
2782 }
|
|
2783 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
2784 }
|
|
2785
|
|
2786 /* Convert Shift-JIS data to internal format. */
|
|
2787
|
|
2788 static void
|
412
|
2789 decode_coding_sjis (Lstream *decoding, CONST unsigned char *src,
|
259
|
2790 unsigned_char_dynarr *dst, unsigned int n)
|
|
2791 {
|
|
2792 unsigned char c;
|
|
2793 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
396
|
2794 unsigned int flags = str->flags;
|
|
2795 unsigned int ch = str->ch;
|
|
2796 eol_type_t eol_type = str->eol_type;
|
259
|
2797
|
|
2798 while (n--)
|
|
2799 {
|
|
2800 c = *src++;
|
|
2801
|
|
2802 if (ch)
|
|
2803 {
|
|
2804 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
2805 if (BYTE_SJIS_TWO_BYTE_2_P (c))
|
|
2806 {
|
|
2807 unsigned char e1, e2;
|
|
2808
|
|
2809 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
2810 DECODE_SJIS (ch, c, e1, e2);
|
|
2811 Dynarr_add (dst, e1);
|
|
2812 Dynarr_add (dst, e2);
|
|
2813 }
|
|
2814 else
|
|
2815 {
|
|
2816 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
2817 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
2818 }
|
|
2819 ch = 0;
|
|
2820 }
|
|
2821 else
|
|
2822 {
|
|
2823 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
2824 if (BYTE_SJIS_TWO_BYTE_1_P (c))
|
|
2825 ch = c;
|
|
2826 else if (BYTE_SJIS_KATAKANA_P (c))
|
|
2827 {
|
|
2828 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
|
|
2829 Dynarr_add (dst, c);
|
|
2830 }
|
|
2831 else
|
|
2832 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
2833 }
|
|
2834 label_continue_loop:;
|
|
2835 }
|
|
2836
|
|
2837 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
2838
|
396
|
2839 str->flags = flags;
|
|
2840 str->ch = ch;
|
259
|
2841 }
|
|
2842
|
|
2843 /* Convert internally-formatted data to Shift-JIS. */
|
|
2844
|
|
2845 static void
|
412
|
2846 encode_coding_sjis (Lstream *encoding, CONST unsigned char *src,
|
259
|
2847 unsigned_char_dynarr *dst, unsigned int n)
|
|
2848 {
|
|
2849 unsigned char c;
|
|
2850 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
396
|
2851 unsigned int flags = str->flags;
|
|
2852 unsigned int ch = str->ch;
|
|
2853 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
259
|
2854
|
|
2855 while (n--)
|
|
2856 {
|
|
2857 c = *src++;
|
|
2858 if (c == '\n')
|
|
2859 {
|
|
2860 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
2861 Dynarr_add (dst, '\r');
|
|
2862 if (eol_type != EOL_CR)
|
|
2863 Dynarr_add (dst, '\n');
|
|
2864 ch = 0;
|
|
2865 }
|
|
2866 else if (BYTE_ASCII_P (c))
|
|
2867 {
|
|
2868 Dynarr_add (dst, c);
|
|
2869 ch = 0;
|
|
2870 }
|
|
2871 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
2872 ch = (c == LEADING_BYTE_KATAKANA_JISX0201 ||
|
|
2873 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
2874 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
2875 else if (ch)
|
|
2876 {
|
|
2877 if (ch == LEADING_BYTE_KATAKANA_JISX0201)
|
|
2878 {
|
|
2879 Dynarr_add (dst, c);
|
|
2880 ch = 0;
|
|
2881 }
|
|
2882 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
2883 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
2884 ch = c;
|
|
2885 else
|
|
2886 {
|
|
2887 unsigned char j1, j2;
|
|
2888 ENCODE_SJIS (ch, c, j1, j2);
|
|
2889 Dynarr_add (dst, j1);
|
|
2890 Dynarr_add (dst, j2);
|
|
2891 ch = 0;
|
|
2892 }
|
|
2893 }
|
|
2894 }
|
|
2895
|
396
|
2896 str->flags = flags;
|
|
2897 str->ch = ch;
|
259
|
2898 }
|
|
2899
|
|
2900 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
2901 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
2902 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
2903 Return the corresponding character.
|
|
2904 */
|
|
2905 (code))
|
|
2906 {
|
|
2907 unsigned char c1, c2, s1, s2;
|
|
2908
|
|
2909 CHECK_CONS (code);
|
|
2910 CHECK_INT (XCAR (code));
|
|
2911 CHECK_INT (XCDR (code));
|
|
2912 s1 = XINT (XCAR (code));
|
|
2913 s2 = XINT (XCDR (code));
|
|
2914 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
|
|
2915 BYTE_SJIS_TWO_BYTE_2_P (s2))
|
|
2916 {
|
|
2917 DECODE_SJIS (s1, s2, c1, c2);
|
|
2918 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
2919 c1 & 0x7F, c2 & 0x7F));
|
|
2920 }
|
|
2921 else
|
|
2922 return Qnil;
|
|
2923 }
|
|
2924
|
|
2925 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
2926 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
2927 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
2928 */
|
|
2929 (ch))
|
|
2930 {
|
|
2931 Lisp_Object charset;
|
|
2932 int c1, c2, s1, s2;
|
|
2933
|
|
2934 CHECK_CHAR_COERCE_INT (ch);
|
|
2935 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
2936 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
2937 {
|
|
2938 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
2939 return Fcons (make_int (s1), make_int (s2));
|
|
2940 }
|
|
2941 else
|
|
2942 return Qnil;
|
|
2943 }
|
|
2944
|
|
2945
|
|
2946 /************************************************************************/
|
|
2947 /* Big5 methods */
|
|
2948 /************************************************************************/
|
|
2949
|
|
2950 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
2951 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
2952 character set and is encoded in two-byte.
|
|
2953
|
|
2954 --- CODE RANGE of BIG5 ---
|
|
2955 (character set) (range)
|
|
2956 ASCII 0x00 .. 0x7F
|
|
2957 Big5 (1st byte) 0xA1 .. 0xFE
|
|
2958 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
2959 --------------------------
|
|
2960
|
|
2961 Since the number of characters in Big5 is larger than maximum
|
|
2962 characters in Emacs' charset (96x96), it can't be handled as one
|
380
|
2963 charset. So, in Emacs, Big5 is divided into two: `charset-big5-1'
|
396
|
2964 and `charset-big5-2'. Both <type>s are DIMENSION2_CHARS94. The former
|
259
|
2965 contains frequently used characters and the latter contains less
|
|
2966 frequently used characters. */
|
|
2967
|
|
2968 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
2969 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
2970
|
|
2971 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
2972
|
|
2973 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
2974 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
2975
|
|
2976 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
2977
|
|
2978 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
2979
|
|
2980 /* Code conversion macros. These are macros because they are used in
|
|
2981 inner loops during code conversion.
|
|
2982
|
|
2983 Note that temporary variables in macros introduce the classic
|
|
2984 dynamic-scoping problems with variable names. We use capital-
|
|
2985 lettered variables in the assumption that XEmacs does not use
|
|
2986 capital letters in variables except in a very formalized way
|
|
2987 (e.g. Qstring). */
|
|
2988
|
|
2989 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
2990 (lb, c1, c2). */
|
|
2991
|
|
2992 /* There is a much simpler way to split the Big5 charset into two.
|
|
2993 For the moment I'm going to leave the algorithm as-is because it
|
|
2994 claims to separate out the most-used characters into a single
|
|
2995 charset, which perhaps will lead to optimizations in various
|
|
2996 places.
|
|
2997
|
|
2998 The way the algorithm works is something like this:
|
|
2999
|
|
3000 Big5 can be viewed as a 94x157 charset, where the row is
|
|
3001 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
3002 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
3003 the split between low and high column numbers is apparently
|
|
3004 meaningless; ascending rows produce less and less frequent chars.
|
|
3005 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
3006 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
3007 second. To do the conversion, we convert the character into
|
|
3008 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
3009 is the second, etc. That way, the characters are ordered by
|
|
3010 decreasing frequency. Then we just chop the space in two
|
|
3011 and coerce the result into a 94x94 space.
|
|
3012 */
|
|
3013
|
|
3014 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
3015 { \
|
|
3016 int B1 = b1, B2 = b2; \
|
|
3017 unsigned int I \
|
|
3018 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
3019 \
|
|
3020 if (B1 < 0xC9) \
|
|
3021 { \
|
|
3022 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
3023 } \
|
|
3024 else \
|
|
3025 { \
|
|
3026 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
3027 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
3028 } \
|
|
3029 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
3030 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
3031 } while (0)
|
|
3032
|
|
3033 /* Convert the internal string representation of a Big5 character
|
|
3034 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
3035
|
|
3036 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
3037 { \
|
|
3038 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
3039 \
|
|
3040 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
3041 { \
|
|
3042 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
3043 } \
|
|
3044 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
3045 b2 = I % BIG5_SAME_ROW; \
|
|
3046 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
3047 } while (0)
|
|
3048
|
|
3049 static int
|
412
|
3050 detect_coding_big5 (struct detection_state *st, CONST unsigned char *src,
|
259
|
3051 unsigned int n)
|
|
3052 {
|
|
3053 int c;
|
|
3054
|
|
3055 while (n--)
|
|
3056 {
|
|
3057 c = *src++;
|
|
3058 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
3059 (c >= 0x80 && c <= 0xA0))
|
|
3060 return 0;
|
|
3061 if (st->big5.in_second_byte)
|
|
3062 {
|
|
3063 st->big5.in_second_byte = 0;
|
|
3064 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
3065 return 0;
|
|
3066 }
|
|
3067 else if (c >= 0xA1)
|
|
3068 st->big5.in_second_byte = 1;
|
|
3069 }
|
|
3070 return CODING_CATEGORY_BIG5_MASK;
|
|
3071 }
|
|
3072
|
|
3073 /* Convert Big5 data to internal format. */
|
|
3074
|
|
3075 static void
|
412
|
3076 decode_coding_big5 (Lstream *decoding, CONST unsigned char *src,
|
259
|
3077 unsigned_char_dynarr *dst, unsigned int n)
|
|
3078 {
|
|
3079 unsigned char c;
|
|
3080 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
396
|
3081 unsigned int flags = str->flags;
|
|
3082 unsigned int ch = str->ch;
|
|
3083 eol_type_t eol_type = str->eol_type;
|
259
|
3084
|
|
3085 while (n--)
|
|
3086 {
|
|
3087 c = *src++;
|
|
3088 if (ch)
|
|
3089 {
|
|
3090 /* Previous character was first byte of Big5 char. */
|
|
3091 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
3092 {
|
|
3093 unsigned char b1, b2, b3;
|
|
3094 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
3095 Dynarr_add (dst, b1);
|
|
3096 Dynarr_add (dst, b2);
|
|
3097 Dynarr_add (dst, b3);
|
|
3098 }
|
|
3099 else
|
|
3100 {
|
|
3101 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
3102 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
3103 }
|
|
3104 ch = 0;
|
|
3105 }
|
|
3106 else
|
|
3107 {
|
|
3108 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
3109 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
3110 ch = c;
|
|
3111 else
|
|
3112 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
3113 }
|
|
3114 label_continue_loop:;
|
|
3115 }
|
|
3116
|
|
3117 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
3118
|
396
|
3119 str->flags = flags;
|
|
3120 str->ch = ch;
|
259
|
3121 }
|
|
3122
|
|
3123 /* Convert internally-formatted data to Big5. */
|
|
3124
|
|
3125 static void
|
412
|
3126 encode_coding_big5 (Lstream *encoding, CONST unsigned char *src,
|
259
|
3127 unsigned_char_dynarr *dst, unsigned int n)
|
|
3128 {
|
|
3129 unsigned char c;
|
|
3130 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
396
|
3131 unsigned int flags = str->flags;
|
|
3132 unsigned int ch = str->ch;
|
|
3133 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
259
|
3134
|
|
3135 while (n--)
|
|
3136 {
|
|
3137 c = *src++;
|
|
3138 if (c == '\n')
|
|
3139 {
|
|
3140 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
3141 Dynarr_add (dst, '\r');
|
|
3142 if (eol_type != EOL_CR)
|
|
3143 Dynarr_add (dst, '\n');
|
|
3144 }
|
|
3145 else if (BYTE_ASCII_P (c))
|
|
3146 {
|
|
3147 /* ASCII. */
|
|
3148 Dynarr_add (dst, c);
|
|
3149 }
|
|
3150 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
3151 {
|
|
3152 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
3153 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
3154 {
|
|
3155 /* A recognized leading byte. */
|
|
3156 ch = c;
|
|
3157 continue; /* not done with this character. */
|
|
3158 }
|
|
3159 /* otherwise just ignore this character. */
|
|
3160 }
|
|
3161 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
3162 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
3163 {
|
|
3164 /* Previous char was a recognized leading byte. */
|
|
3165 ch = (ch << 8) | c;
|
|
3166 continue; /* not done with this character. */
|
|
3167 }
|
|
3168 else if (ch)
|
|
3169 {
|
|
3170 /* Encountering second byte of a Big5 character. */
|
|
3171 unsigned char b1, b2;
|
|
3172
|
|
3173 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
3174 Dynarr_add (dst, b1);
|
|
3175 Dynarr_add (dst, b2);
|
|
3176 }
|
|
3177
|
|
3178 ch = 0;
|
|
3179 }
|
|
3180
|
396
|
3181 str->flags = flags;
|
|
3182 str->ch = ch;
|
259
|
3183 }
|
|
3184
|
|
3185
|
|
3186 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
3187 Decode a Big5 character CODE of BIG5 coding-system.
|
|
3188 CODE is the character code in BIG5, a cons of two integers.
|
|
3189 Return the corresponding character.
|
|
3190 */
|
|
3191 (code))
|
|
3192 {
|
|
3193 unsigned char c1, c2, b1, b2;
|
|
3194
|
|
3195 CHECK_CONS (code);
|
|
3196 CHECK_INT (XCAR (code));
|
|
3197 CHECK_INT (XCDR (code));
|
|
3198 b1 = XINT (XCAR (code));
|
|
3199 b2 = XINT (XCDR (code));
|
|
3200 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
3201 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
3202 {
|
|
3203 int leading_byte;
|
|
3204 Lisp_Object charset;
|
|
3205 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
|
|
3206 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
|
|
3207 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
3208 }
|
|
3209 else
|
|
3210 return Qnil;
|
|
3211 }
|
|
3212
|
|
3213 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
3214 Encode the Big5 character CH to BIG5 coding-system.
|
|
3215 Return the corresponding character code in Big5.
|
|
3216 */
|
|
3217 (ch))
|
|
3218 {
|
|
3219 Lisp_Object charset;
|
|
3220 int c1, c2, b1, b2;
|
|
3221
|
|
3222 CHECK_CHAR_COERCE_INT (ch);
|
|
3223 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
3224 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
3225 EQ (charset, Vcharset_chinese_big5_2))
|
|
3226 {
|
|
3227 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
3228 b1, b2);
|
|
3229 return Fcons (make_int (b1), make_int (b2));
|
|
3230 }
|
|
3231 else
|
|
3232 return Qnil;
|
|
3233 }
|
|
3234
|
|
3235
|
|
3236 /************************************************************************/
|
396
|
3237 /* UCS-4 methods */
|
|
3238 /* */
|
|
3239 /* UCS-4 character codes are implemented as nonnegative integers. */
|
|
3240 /* */
|
|
3241 /************************************************************************/
|
|
3242
|
|
3243
|
|
3244 DEFUN ("set-ucs-char", Fset_ucs_char, 2, 2, 0, /*
|
|
3245 Map UCS-4 code CODE to Mule character CHARACTER.
|
|
3246
|
|
3247 Return T on success, NIL on failure.
|
|
3248 */
|
|
3249 (code, character))
|
|
3250 {
|
|
3251 unsigned int c;
|
|
3252
|
|
3253 CHECK_CHAR (character);
|
|
3254 CHECK_INT (code);
|
|
3255 c = XINT (code);
|
|
3256
|
424
|
3257 if (c < sizeof (fcd->ucs_to_mule_table))
|
396
|
3258 {
|
424
|
3259 fcd->ucs_to_mule_table[c] = character;
|
396
|
3260 return Qt;
|
|
3261 }
|
|
3262 else
|
|
3263 return Qnil;
|
|
3264 }
|
|
3265
|
|
3266 static Lisp_Object
|
|
3267 ucs_to_char (unsigned long code)
|
|
3268 {
|
424
|
3269 if (code < sizeof (fcd->ucs_to_mule_table))
|
396
|
3270 {
|
424
|
3271 return fcd->ucs_to_mule_table[code];
|
396
|
3272 }
|
|
3273 else if ((0xe00000 <= code) && (code <= 0xe00000 + 94 * 94 * 14))
|
|
3274 {
|
|
3275 unsigned int c;
|
|
3276
|
|
3277 code -= 0xe00000;
|
|
3278 c = code % (94 * 94);
|
|
3279 return make_char
|
|
3280 (MAKE_CHAR (CHARSET_BY_ATTRIBUTES
|
|
3281 (CHARSET_TYPE_94X94, code / (94 * 94) + '@',
|
|
3282 CHARSET_LEFT_TO_RIGHT),
|
|
3283 c / 94 + 33, c % 94 + 33));
|
|
3284 }
|
|
3285 else
|
|
3286 return Qnil;
|
|
3287 }
|
|
3288
|
|
3289 DEFUN ("ucs-char", Fucs_char, 1, 1, 0, /*
|
|
3290 Return Mule character corresponding to UCS code CODE (a positive integer).
|
|
3291 */
|
|
3292 (code))
|
|
3293 {
|
|
3294 CHECK_NATNUM (code);
|
|
3295 return ucs_to_char (XINT (code));
|
|
3296 }
|
|
3297
|
|
3298 DEFUN ("set-char-ucs", Fset_char_ucs, 2, 2, 0, /*
|
|
3299 Map Mule character CHARACTER to UCS code CODE (a positive integer).
|
|
3300 */
|
|
3301 (character, code))
|
|
3302 {
|
|
3303 /* #### Isn't this gilding the lily? Fput_char_table checks its args.
|
|
3304 Fset_char_ucs is more restrictive on index arg, but should
|
|
3305 check code arg in a char_table method. */
|
|
3306 CHECK_CHAR (character);
|
|
3307 CHECK_NATNUM (code);
|
|
3308 return Fput_char_table (character, code, mule_to_ucs_table);
|
|
3309 }
|
|
3310
|
|
3311 DEFUN ("char-ucs", Fchar_ucs, 1, 1, 0, /*
|
|
3312 Return the UCS code (a positive integer) corresponding to CHARACTER.
|
|
3313 */
|
|
3314 (character))
|
|
3315 {
|
|
3316 return Fget_char_table (character, mule_to_ucs_table);
|
|
3317 }
|
|
3318
|
|
3319 /* Decode a UCS-4 character into a buffer. If the lookup fails, use
|
398
|
3320 <GETA MARK> (U+3013) of JIS X 0208, which means correct character
|
|
3321 is not found, instead.
|
396
|
3322 #### do something more appropriate (use blob?)
|
|
3323 Danger, Will Robinson! Data loss. Should we signal user? */
|
|
3324 static void
|
|
3325 decode_ucs4 (unsigned long ch, unsigned_char_dynarr *dst)
|
|
3326 {
|
|
3327 Lisp_Object chr = ucs_to_char (ch);
|
|
3328
|
|
3329 if (! NILP (chr))
|
|
3330 {
|
|
3331 Bufbyte work[MAX_EMCHAR_LEN];
|
|
3332 int len;
|
|
3333
|
|
3334 ch = XCHAR (chr);
|
|
3335 len = (ch < 128) ?
|
|
3336 simple_set_charptr_emchar (work, ch) :
|
|
3337 non_ascii_set_charptr_emchar (work, ch);
|
|
3338 Dynarr_add_many (dst, work, len);
|
|
3339 }
|
|
3340 else
|
|
3341 {
|
|
3342 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
3343 Dynarr_add (dst, 34 + 128);
|
|
3344 Dynarr_add (dst, 46 + 128);
|
|
3345 }
|
|
3346 }
|
|
3347
|
|
3348 static unsigned long
|
|
3349 mule_char_to_ucs4 (Lisp_Object charset,
|
|
3350 unsigned char h, unsigned char l)
|
|
3351 {
|
|
3352 Lisp_Object code
|
|
3353 = Fget_char_table (make_char (MAKE_CHAR (charset, h & 127, l & 127)),
|
|
3354 mule_to_ucs_table);
|
|
3355
|
|
3356 if (INTP (code))
|
|
3357 {
|
|
3358 return XINT (code);
|
|
3359 }
|
|
3360 else if ( (XCHARSET_DIMENSION (charset) == 2) &&
|
|
3361 (XCHARSET_CHARS (charset) == 94) )
|
|
3362 {
|
|
3363 unsigned char final = XCHARSET_FINAL (charset);
|
|
3364
|
|
3365 if ( ('@' <= final) && (final < 0x7f) )
|
|
3366 {
|
|
3367 return 0xe00000 + (final - '@') * 94 * 94
|
|
3368 + ((h & 127) - 33) * 94 + (l & 127) - 33;
|
|
3369 }
|
|
3370 else
|
|
3371 {
|
|
3372 return '?';
|
|
3373 }
|
|
3374 }
|
|
3375 else
|
|
3376 {
|
|
3377 return '?';
|
|
3378 }
|
|
3379 }
|
|
3380
|
|
3381 static void
|
|
3382 encode_ucs4 (Lisp_Object charset,
|
|
3383 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
3384 {
|
|
3385 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
3386 Dynarr_add (dst, code >> 24);
|
|
3387 Dynarr_add (dst, (code >> 16) & 255);
|
|
3388 Dynarr_add (dst, (code >> 8) & 255);
|
|
3389 Dynarr_add (dst, code & 255);
|
|
3390 }
|
|
3391
|
|
3392 static int
|
412
|
3393 detect_coding_ucs4 (struct detection_state *st, CONST unsigned char *src,
|
396
|
3394 unsigned int n)
|
|
3395 {
|
|
3396 while (n--)
|
|
3397 {
|
|
3398 int c = *src++;
|
|
3399 switch (st->ucs4.in_byte)
|
|
3400 {
|
|
3401 case 0:
|
|
3402 if (c >= 128)
|
|
3403 return 0;
|
|
3404 else
|
|
3405 st->ucs4.in_byte++;
|
|
3406 break;
|
|
3407 case 3:
|
|
3408 st->ucs4.in_byte = 0;
|
|
3409 break;
|
|
3410 default:
|
|
3411 st->ucs4.in_byte++;
|
|
3412 }
|
|
3413 }
|
|
3414 return CODING_CATEGORY_UCS4_MASK;
|
|
3415 }
|
|
3416
|
|
3417 static void
|
412
|
3418 decode_coding_ucs4 (Lstream *decoding, CONST unsigned char *src,
|
396
|
3419 unsigned_char_dynarr *dst, unsigned int n)
|
|
3420 {
|
|
3421 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
3422 unsigned int flags = str->flags;
|
|
3423 unsigned int ch = str->ch;
|
424
|
3424 unsigned char counter = str->counter;
|
396
|
3425
|
|
3426 while (n--)
|
|
3427 {
|
|
3428 unsigned char c = *src++;
|
424
|
3429 switch (counter)
|
396
|
3430 {
|
|
3431 case 0:
|
|
3432 ch = c;
|
424
|
3433 counter = 3;
|
396
|
3434 break;
|
|
3435 case 1:
|
|
3436 decode_ucs4 ( ( ch << 8 ) | c, dst);
|
|
3437 ch = 0;
|
424
|
3438 counter = 0;
|
396
|
3439 break;
|
|
3440 default:
|
|
3441 ch = ( ch << 8 ) | c;
|
424
|
3442 counter--;
|
396
|
3443 }
|
|
3444 }
|
424
|
3445 if (counter & CODING_STATE_END)
|
396
|
3446 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
3447
|
|
3448 str->flags = flags;
|
|
3449 str->ch = ch;
|
424
|
3450 str->counter = counter;
|
396
|
3451 }
|
|
3452
|
|
3453 static void
|
412
|
3454 encode_coding_ucs4 (Lstream *encoding, CONST unsigned char *src,
|
396
|
3455 unsigned_char_dynarr *dst, unsigned int n)
|
|
3456 {
|
|
3457 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
3458 unsigned int flags = str->flags;
|
|
3459 unsigned int ch = str->ch;
|
|
3460 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
3461 Lisp_Object charset = str->iso2022.current_charset;
|
|
3462
|
|
3463 #ifdef ENABLE_COMPOSITE_CHARS
|
|
3464 /* flags for handling composite chars. We do a little switcharoo
|
|
3465 on the source while we're outputting the composite char. */
|
|
3466 unsigned int saved_n = 0;
|
412
|
3467 CONST unsigned char *saved_src = NULL;
|
396
|
3468 int in_composite = 0;
|
|
3469
|
|
3470 back_to_square_n:
|
|
3471 #endif
|
|
3472
|
|
3473 while (n--)
|
|
3474 {
|
|
3475 unsigned char c = *src++;
|
|
3476
|
|
3477 if (BYTE_ASCII_P (c))
|
|
3478 { /* Processing ASCII character */
|
|
3479 ch = 0;
|
|
3480 encode_ucs4 (Vcharset_ascii, c, 0, dst);
|
|
3481 char_boundary = 1;
|
|
3482 }
|
|
3483 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
3484 { /* Processing Leading Byte */
|
|
3485 ch = 0;
|
|
3486 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
3487 if (LEADING_BYTE_PREFIX_P(c))
|
|
3488 ch = c;
|
|
3489 char_boundary = 0;
|
|
3490 }
|
|
3491 else
|
|
3492 { /* Processing Non-ASCII character */
|
|
3493 char_boundary = 1;
|
|
3494 if (EQ (charset, Vcharset_control_1))
|
|
3495 {
|
|
3496 encode_ucs4 (Vcharset_control_1, c, 0, dst);
|
|
3497 }
|
|
3498 else
|
|
3499 {
|
|
3500 switch (XCHARSET_REP_BYTES (charset))
|
|
3501 {
|
|
3502 case 2:
|
|
3503 encode_ucs4 (charset, c, 0, dst);
|
|
3504 break;
|
|
3505 case 3:
|
|
3506 if (XCHARSET_PRIVATE_P (charset))
|
|
3507 {
|
|
3508 encode_ucs4 (charset, c, 0, dst);
|
|
3509 ch = 0;
|
|
3510 }
|
|
3511 else if (ch)
|
|
3512 {
|
|
3513 #ifdef ENABLE_COMPOSITE_CHARS
|
|
3514 if (EQ (charset, Vcharset_composite))
|
|
3515 {
|
|
3516 if (in_composite)
|
|
3517 {
|
|
3518 /* #### Bother! We don't know how to
|
|
3519 handle this yet. */
|
|
3520 Dynarr_add (dst, 0);
|
|
3521 Dynarr_add (dst, 0);
|
|
3522 Dynarr_add (dst, 0);
|
|
3523 Dynarr_add (dst, '~');
|
|
3524 }
|
|
3525 else
|
|
3526 {
|
|
3527 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
3528 ch & 0x7F, c & 0x7F);
|
|
3529 Lisp_Object lstr = composite_char_string (emch);
|
|
3530 saved_n = n;
|
|
3531 saved_src = src;
|
|
3532 in_composite = 1;
|
|
3533 src = XSTRING_DATA (lstr);
|
|
3534 n = XSTRING_LENGTH (lstr);
|
|
3535 }
|
|
3536 }
|
|
3537 else
|
|
3538 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
3539 {
|
|
3540 encode_ucs4(charset, ch, c, dst);
|
|
3541 }
|
|
3542 ch = 0;
|
|
3543 }
|
|
3544 else
|
|
3545 {
|
|
3546 ch = c;
|
|
3547 char_boundary = 0;
|
|
3548 }
|
|
3549 break;
|
|
3550 case 4:
|
|
3551 if (ch)
|
|
3552 {
|
|
3553 encode_ucs4 (charset, ch, c, dst);
|
|
3554 ch = 0;
|
|
3555 }
|
|
3556 else
|
|
3557 {
|
|
3558 ch = c;
|
|
3559 char_boundary = 0;
|
|
3560 }
|
|
3561 break;
|
|
3562 default:
|
|
3563 abort ();
|
|
3564 }
|
|
3565 }
|
|
3566 }
|
|
3567 }
|
|
3568
|
|
3569 #ifdef ENABLE_COMPOSITE_CHARS
|
|
3570 if (in_composite)
|
|
3571 {
|
|
3572 n = saved_n;
|
|
3573 src = saved_src;
|
|
3574 in_composite = 0;
|
|
3575 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
3576 }
|
|
3577 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
3578
|
|
3579 str->flags = flags;
|
|
3580 str->ch = ch;
|
|
3581 str->iso2022.current_char_boundary = char_boundary;
|
|
3582 str->iso2022.current_charset = charset;
|
|
3583
|
|
3584 /* Verbum caro factum est! */
|
|
3585 }
|
|
3586
|
|
3587
|
|
3588 /************************************************************************/
|
|
3589 /* UTF-8 methods */
|
|
3590 /************************************************************************/
|
|
3591
|
|
3592 static int
|
412
|
3593 detect_coding_utf8 (struct detection_state *st, CONST unsigned char *src,
|
396
|
3594 unsigned int n)
|
|
3595 {
|
|
3596 while (n--)
|
|
3597 {
|
|
3598 unsigned char c = *src++;
|
|
3599 switch (st->utf8.in_byte)
|
|
3600 {
|
|
3601 case 0:
|
|
3602 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
3603 return 0;
|
|
3604 else if (c >= 0xfc)
|
|
3605 st->utf8.in_byte = 5;
|
|
3606 else if (c >= 0xf8)
|
|
3607 st->utf8.in_byte = 4;
|
|
3608 else if (c >= 0xf0)
|
|
3609 st->utf8.in_byte = 3;
|
|
3610 else if (c >= 0xe0)
|
|
3611 st->utf8.in_byte = 2;
|
|
3612 else if (c >= 0xc0)
|
|
3613 st->utf8.in_byte = 1;
|
|
3614 else if (c >= 0x80)
|
|
3615 return 0;
|
|
3616 break;
|
|
3617 default:
|
|
3618 if ((c & 0xc0) != 0x80)
|
|
3619 return 0;
|
|
3620 else
|
|
3621 st->utf8.in_byte--;
|
|
3622 }
|
|
3623 }
|
|
3624 return CODING_CATEGORY_UTF8_MASK;
|
|
3625 }
|
|
3626
|
|
3627 static void
|
412
|
3628 decode_coding_utf8 (Lstream *decoding, CONST unsigned char *src,
|
396
|
3629 unsigned_char_dynarr *dst, unsigned int n)
|
|
3630 {
|
|
3631 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
3632 unsigned int flags = str->flags;
|
|
3633 unsigned int ch = str->ch;
|
|
3634 eol_type_t eol_type = str->eol_type;
|
424
|
3635 unsigned char counter = str->counter;
|
396
|
3636
|
|
3637 while (n--)
|
|
3638 {
|
|
3639 unsigned char c = *src++;
|
424
|
3640 switch (counter)
|
396
|
3641 {
|
|
3642 case 0:
|
|
3643 if ( c >= 0xfc )
|
|
3644 {
|
|
3645 ch = c & 0x01;
|
424
|
3646 counter = 5;
|
396
|
3647 }
|
|
3648 else if ( c >= 0xf8 )
|
|
3649 {
|
|
3650 ch = c & 0x03;
|
424
|
3651 counter = 4;
|
396
|
3652 }
|
|
3653 else if ( c >= 0xf0 )
|
|
3654 {
|
|
3655 ch = c & 0x07;
|
424
|
3656 counter = 3;
|
396
|
3657 }
|
|
3658 else if ( c >= 0xe0 )
|
|
3659 {
|
|
3660 ch = c & 0x0f;
|
424
|
3661 counter = 2;
|
396
|
3662 }
|
|
3663 else if ( c >= 0xc0 )
|
|
3664 {
|
|
3665 ch = c & 0x1f;
|
424
|
3666 counter = 1;
|
396
|
3667 }
|
|
3668 else
|
|
3669 {
|
|
3670 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
3671 decode_ucs4 (c, dst);
|
|
3672 }
|
|
3673 break;
|
|
3674 case 1:
|
|
3675 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
3676 decode_ucs4 (ch, dst);
|
|
3677 ch = 0;
|
424
|
3678 counter = 0;
|
396
|
3679 break;
|
|
3680 default:
|
|
3681 ch = ( ch << 6 ) | ( c & 0x3f );
|
424
|
3682 counter--;
|
396
|
3683 }
|
|
3684 label_continue_loop:;
|
|
3685 }
|
|
3686
|
|
3687 if (flags & CODING_STATE_END)
|
|
3688 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
3689
|
|
3690 str->flags = flags;
|
|
3691 str->ch = ch;
|
424
|
3692 str->counter = counter;
|
396
|
3693 }
|
|
3694
|
|
3695 static void
|
|
3696 encode_utf8 (Lisp_Object charset,
|
|
3697 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
3698 {
|
|
3699 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
3700 if ( code <= 0x7f )
|
|
3701 {
|
|
3702 Dynarr_add (dst, code);
|
|
3703 }
|
|
3704 else if ( code <= 0x7ff )
|
|
3705 {
|
|
3706 Dynarr_add (dst, (code >> 6) | 0xc0);
|
|
3707 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
3708 }
|
|
3709 else if ( code <= 0xffff )
|
|
3710 {
|
|
3711 Dynarr_add (dst, (code >> 12) | 0xe0);
|
|
3712 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
3713 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
3714 }
|
|
3715 else if ( code <= 0x1fffff )
|
|
3716 {
|
|
3717 Dynarr_add (dst, (code >> 18) | 0xf0);
|
|
3718 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
3719 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
3720 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
3721 }
|
|
3722 else if ( code <= 0x3ffffff )
|
|
3723 {
|
|
3724 Dynarr_add (dst, (code >> 24) | 0xf8);
|
|
3725 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
3726 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
3727 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
3728 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
3729 }
|
|
3730 else
|
|
3731 {
|
|
3732 Dynarr_add (dst, (code >> 30) | 0xfc);
|
|
3733 Dynarr_add (dst, ((code >> 24) & 0x3f) | 0x80);
|
|
3734 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
3735 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
3736 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
3737 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
3738 }
|
|
3739 }
|
|
3740
|
|
3741 static void
|
412
|
3742 encode_coding_utf8 (Lstream *encoding, CONST unsigned char *src,
|
396
|
3743 unsigned_char_dynarr *dst, unsigned int n)
|
|
3744 {
|
|
3745 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
3746 unsigned int flags = str->flags;
|
|
3747 unsigned int ch = str->ch;
|
|
3748 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
3749 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
3750 Lisp_Object charset = str->iso2022.current_charset;
|
|
3751
|
|
3752 #ifdef ENABLE_COMPOSITE_CHARS
|
|
3753 /* flags for handling composite chars. We do a little switcharoo
|
|
3754 on the source while we're outputting the composite char. */
|
|
3755 unsigned int saved_n = 0;
|
412
|
3756 CONST unsigned char *saved_src = NULL;
|
396
|
3757 int in_composite = 0;
|
|
3758
|
|
3759 back_to_square_n:
|
|
3760 #endif /* ENABLE_COMPOSITE_CHARS */
|
412
|
3761
|
396
|
3762 while (n--)
|
|
3763 {
|
|
3764 unsigned char c = *src++;
|
|
3765
|
|
3766 if (BYTE_ASCII_P (c))
|
|
3767 { /* Processing ASCII character */
|
|
3768 ch = 0;
|
|
3769 if (c == '\n')
|
|
3770 {
|
|
3771 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
3772 Dynarr_add (dst, '\r');
|
|
3773 if (eol_type != EOL_CR)
|
|
3774 Dynarr_add (dst, c);
|
|
3775 }
|
|
3776 else
|
|
3777 encode_utf8 (Vcharset_ascii, c, 0, dst);
|
|
3778 char_boundary = 1;
|
|
3779 }
|
|
3780 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
3781 { /* Processing Leading Byte */
|
|
3782 ch = 0;
|
|
3783 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
3784 if (LEADING_BYTE_PREFIX_P(c))
|
|
3785 ch = c;
|
|
3786 char_boundary = 0;
|
|
3787 }
|
|
3788 else
|
|
3789 { /* Processing Non-ASCII character */
|
|
3790 char_boundary = 1;
|
|
3791 if (EQ (charset, Vcharset_control_1))
|
|
3792 {
|
|
3793 encode_utf8 (Vcharset_control_1, c, 0, dst);
|
|
3794 }
|
|
3795 else
|
|
3796 {
|
|
3797 switch (XCHARSET_REP_BYTES (charset))
|
|
3798 {
|
|
3799 case 2:
|
|
3800 encode_utf8 (charset, c, 0, dst);
|
|
3801 break;
|
|
3802 case 3:
|
|
3803 if (XCHARSET_PRIVATE_P (charset))
|
|
3804 {
|
|
3805 encode_utf8 (charset, c, 0, dst);
|
|
3806 ch = 0;
|
|
3807 }
|
|
3808 else if (ch)
|
|
3809 {
|
|
3810 #ifdef ENABLE_COMPOSITE_CHARS
|
|
3811 if (EQ (charset, Vcharset_composite))
|
|
3812 {
|
|
3813 if (in_composite)
|
|
3814 {
|
|
3815 /* #### Bother! We don't know how to
|
|
3816 handle this yet. */
|
|
3817 encode_utf8 (Vcharset_ascii, '~', 0, dst);
|
|
3818 }
|
|
3819 else
|
|
3820 {
|
|
3821 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
3822 ch & 0x7F, c & 0x7F);
|
|
3823 Lisp_Object lstr = composite_char_string (emch);
|
|
3824 saved_n = n;
|
|
3825 saved_src = src;
|
|
3826 in_composite = 1;
|
|
3827 src = XSTRING_DATA (lstr);
|
|
3828 n = XSTRING_LENGTH (lstr);
|
|
3829 }
|
|
3830 }
|
|
3831 else
|
|
3832 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
3833 {
|
|
3834 encode_utf8 (charset, ch, c, dst);
|
|
3835 }
|
|
3836 ch = 0;
|
|
3837 }
|
|
3838 else
|
|
3839 {
|
|
3840 ch = c;
|
|
3841 char_boundary = 0;
|
|
3842 }
|
|
3843 break;
|
|
3844 case 4:
|
|
3845 if (ch)
|
|
3846 {
|
|
3847 encode_utf8 (charset, ch, c, dst);
|
|
3848 ch = 0;
|
|
3849 }
|
|
3850 else
|
|
3851 {
|
|
3852 ch = c;
|
|
3853 char_boundary = 0;
|
|
3854 }
|
|
3855 break;
|
|
3856 default:
|
|
3857 abort ();
|
|
3858 }
|
|
3859 }
|
|
3860 }
|
|
3861 }
|
|
3862
|
|
3863 #ifdef ENABLE_COMPOSITE_CHARS
|
|
3864 if (in_composite)
|
|
3865 {
|
|
3866 n = saved_n;
|
|
3867 src = saved_src;
|
|
3868 in_composite = 0;
|
|
3869 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
3870 }
|
|
3871 #endif
|
|
3872
|
|
3873 str->flags = flags;
|
|
3874 str->ch = ch;
|
|
3875 str->iso2022.current_char_boundary = char_boundary;
|
|
3876 str->iso2022.current_charset = charset;
|
|
3877
|
|
3878 /* Verbum caro factum est! */
|
|
3879 }
|
|
3880
|
|
3881
|
|
3882 /************************************************************************/
|
259
|
3883 /* ISO2022 methods */
|
|
3884 /************************************************************************/
|
|
3885
|
|
3886 /* The following note describes the coding system ISO2022 briefly.
|
396
|
3887 Since the intention of this note is to help understand the
|
|
3888 functions in this file, some parts are NOT ACCURATE or OVERLY
|
259
|
3889 SIMPLIFIED. For thorough understanding, please refer to the
|
|
3890 original document of ISO2022.
|
|
3891
|
|
3892 ISO2022 provides many mechanisms to encode several character sets
|
396
|
3893 in 7-bit and 8-bit environments. For 7-bit environments, all text
|
|
3894 is encoded using bytes less than 128. This may make the encoded
|
|
3895 text a little bit longer, but the text passes more easily through
|
|
3896 several gateways, some of which strip off MSB (Most Signigant Bit).
|
|
3897
|
|
3898 There are two kinds of character sets: control character set and
|
259
|
3899 graphic character set. The former contains control characters such
|
|
3900 as `newline' and `escape' to provide control functions (control
|
396
|
3901 functions are also provided by escape sequences). The latter
|
259
|
3902 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
3903 two control character sets and many graphic character sets.
|
|
3904
|
396
|
3905 Graphic character sets are classified into one of the following
|
|
3906 four classes, according to the number of bytes (DIMENSION) and
|
|
3907 number of characters in one dimension (CHARS) of the set:
|
|
3908 - DIMENSION1_CHARS94
|
|
3909 - DIMENSION1_CHARS96
|
|
3910 - DIMENSION2_CHARS94
|
|
3911 - DIMENSION2_CHARS96
|
|
3912
|
|
3913 In addition, each character set is assigned an identification tag,
|
|
3914 unique for each set, called "final character" (denoted as <F>
|
|
3915 hereafter). The <F> of each character set is decided by ECMA(*)
|
|
3916 when it is registered in ISO. The code range of <F> is 0x30..0x7F
|
|
3917 (0x30..0x3F are for private use only).
|
259
|
3918
|
|
3919 Note (*): ECMA = European Computer Manufacturers Association
|
|
3920
|
|
3921 Here are examples of graphic character set [NAME(<F>)]:
|
396
|
3922 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
3923 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
|
|
3924 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
|
|
3925 o DIMENSION2_CHARS96 -- none for the moment
|
|
3926
|
|
3927 A code area (1 byte = 8 bits) is divided into 4 areas, C0, GL, C1, and GR.
|
259
|
3928 C0 [0x00..0x1F] -- control character plane 0
|
|
3929 GL [0x20..0x7F] -- graphic character plane 0
|
|
3930 C1 [0x80..0x9F] -- control character plane 1
|
|
3931 GR [0xA0..0xFF] -- graphic character plane 1
|
|
3932
|
|
3933 A control character set is directly designated and invoked to C0 or
|
|
3934 C1 by an escape sequence. The most common case is that:
|
|
3935 - ISO646's control character set is designated/invoked to C0, and
|
|
3936 - ISO6429's control character set is designated/invoked to C1,
|
|
3937 and usually these designations/invocations are omitted in encoded
|
|
3938 text. In a 7-bit environment, only C0 can be used, and a control
|
|
3939 character for C1 is encoded by an appropriate escape sequence to
|
|
3940 fit into the environment. All control characters for C1 are
|
|
3941 defined to have corresponding escape sequences.
|
|
3942
|
|
3943 A graphic character set is at first designated to one of four
|
|
3944 graphic registers (G0 through G3), then these graphic registers are
|
|
3945 invoked to GL or GR. These designations and invocations can be
|
|
3946 done independently. The most common case is that G0 is invoked to
|
|
3947 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
3948 these invocations and designations are omitted in encoded text.
|
|
3949 In a 7-bit environment, only GL can be used.
|
|
3950
|
396
|
3951 When a graphic character set of CHARS94 is invoked to GL, codes
|
|
3952 0x20 and 0x7F of the GL area work as control characters SPACE and
|
|
3953 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
|
|
3954 be used.
|
259
|
3955
|
|
3956 There are two ways of invocation: locking-shift and single-shift.
|
|
3957 With locking-shift, the invocation lasts until the next different
|
396
|
3958 invocation, whereas with single-shift, the invocation affects the
|
|
3959 following character only and doesn't affect the locking-shift
|
|
3960 state. Invocations are done by the following control characters or
|
|
3961 escape sequences:
|
259
|
3962
|
|
3963 ----------------------------------------------------------------------
|
|
3964 abbrev function cntrl escape seq description
|
|
3965 ----------------------------------------------------------------------
|
|
3966 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
3967 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
3968 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
3969 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
396
|
3970 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
|
|
3971 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
|
|
3972 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
|
259
|
3973 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
3974 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
3975 ----------------------------------------------------------------------
|
396
|
3976 (*) These are not used by any known coding system.
|
|
3977
|
|
3978 Control characters for these functions are defined by macros
|
|
3979 ISO_CODE_XXX in `coding.h'.
|
|
3980
|
|
3981 Designations are done by the following escape sequences:
|
259
|
3982 ----------------------------------------------------------------------
|
|
3983 escape sequence description
|
|
3984 ----------------------------------------------------------------------
|
396
|
3985 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
|
|
3986 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
|
|
3987 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
|
|
3988 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
|
|
3989 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
|
|
3990 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
|
|
3991 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
|
|
3992 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
|
|
3993 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
|
|
3994 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
|
|
3995 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
|
|
3996 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
|
|
3997 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
|
|
3998 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
|
|
3999 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
|
|
4000 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
|
259
|
4001 ----------------------------------------------------------------------
|
396
|
4002
|
|
4003 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
|
|
4004 of dimension 1, chars 94, and final character <F>, etc...
|
259
|
4005
|
|
4006 Note (*): Although these designations are not allowed in ISO2022,
|
|
4007 Emacs accepts them on decoding, and produces them on encoding
|
396
|
4008 CHARS96 character sets in a coding system which is characterized as
|
|
4009 7-bit environment, non-locking-shift, and non-single-shift.
|
259
|
4010
|
|
4011 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
396
|
4012 '(' can be omitted. We refer to this as "short-form" hereafter.
|
259
|
4013
|
|
4014 Now you may notice that there are a lot of ways for encoding the
|
|
4015 same multilingual text in ISO2022. Actually, there exist many
|
396
|
4016 coding systems such as Compound Text (used in X11's inter client
|
259
|
4017 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
4018 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
4019 localized platforms), and all of these are variants of ISO2022.
|
|
4020
|
|
4021 In addition to the above, Emacs handles two more kinds of escape
|
|
4022 sequences: ISO6429's direction specification and Emacs' private
|
|
4023 sequence for specifying character composition.
|
|
4024
|
396
|
4025 ISO6429's direction specification takes the following form:
|
259
|
4026 o CSI ']' -- end of the current direction
|
|
4027 o CSI '0' ']' -- end of the current direction
|
|
4028 o CSI '1' ']' -- start of left-to-right text
|
|
4029 o CSI '2' ']' -- start of right-to-left text
|
|
4030 The control character CSI (0x9B: control sequence introducer) is
|
396
|
4031 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
|
|
4032
|
|
4033 Character composition specification takes the following form:
|
259
|
4034 o ESC '0' -- start character composition
|
|
4035 o ESC '1' -- end character composition
|
396
|
4036 Since these are not standard escape sequences of any ISO standard,
|
|
4037 their use with these meanings is restricted to Emacs only. */
|
259
|
4038
|
|
4039 static void
|
|
4040 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
4041 {
|
|
4042 int i;
|
|
4043
|
|
4044 for (i = 0; i < 4; i++)
|
|
4045 {
|
|
4046 if (!NILP (coding_system))
|
|
4047 iso->charset[i] =
|
|
4048 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
4049 else
|
|
4050 iso->charset[i] = Qt;
|
|
4051 iso->invalid_designated[i] = 0;
|
|
4052 }
|
|
4053 iso->esc = ISO_ESC_NOTHING;
|
|
4054 iso->esc_bytes_index = 0;
|
|
4055 iso->register_left = 0;
|
|
4056 iso->register_right = 1;
|
|
4057 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
4058 iso->invalid_switch_dir = 0;
|
|
4059 iso->output_direction_sequence = 0;
|
|
4060 iso->output_literally = 0;
|
396
|
4061 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
4062 if (iso->composite_chars)
|
|
4063 Dynarr_reset (iso->composite_chars);
|
396
|
4064 #endif
|
259
|
4065 }
|
|
4066
|
|
4067 static int
|
|
4068 fit_to_be_escape_quoted (unsigned char c)
|
|
4069 {
|
|
4070 switch (c)
|
|
4071 {
|
|
4072 case ISO_CODE_ESC:
|
|
4073 case ISO_CODE_CSI:
|
|
4074 case ISO_CODE_SS2:
|
|
4075 case ISO_CODE_SS3:
|
|
4076 case ISO_CODE_SO:
|
|
4077 case ISO_CODE_SI:
|
|
4078 return 1;
|
|
4079
|
|
4080 default:
|
|
4081 return 0;
|
|
4082 }
|
|
4083 }
|
|
4084
|
|
4085 /* Parse one byte of an ISO2022 escape sequence.
|
|
4086 If the result is an invalid escape sequence, return 0 and
|
|
4087 do not change anything in STR. Otherwise, if the result is
|
|
4088 an incomplete escape sequence, update ISO2022.ESC and
|
|
4089 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
4090 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
4091 return 1.
|
|
4092
|
|
4093 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
4094 or invocation of an invalid character set and treat that as
|
|
4095 an unrecognized escape sequence. */
|
|
4096
|
|
4097 static int
|
|
4098 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
4099 unsigned char c, unsigned int *flags,
|
|
4100 int check_invalid_charsets)
|
|
4101 {
|
|
4102 /* (1) If we're at the end of a designation sequence, CS is the
|
|
4103 charset being designated and REG is the register to designate
|
|
4104 it to.
|
|
4105
|
|
4106 (2) If we're at the end of a locking-shift sequence, REG is
|
|
4107 the register to invoke and HALF (0 == left, 1 == right) is
|
|
4108 the half to invoke it into.
|
|
4109
|
|
4110 (3) If we're at the end of a single-shift sequence, REG is
|
|
4111 the register to invoke. */
|
|
4112 Lisp_Object cs = Qnil;
|
|
4113 int reg, half;
|
|
4114
|
|
4115 /* NOTE: This code does goto's all over the fucking place.
|
|
4116 The reason for this is that we're basically implementing
|
|
4117 a state machine here, and hierarchical languages like C
|
|
4118 don't really provide a clean way of doing this. */
|
|
4119
|
|
4120 if (! (*flags & CODING_STATE_ESCAPE))
|
|
4121 /* At beginning of escape sequence; we need to reset our
|
|
4122 escape-state variables. */
|
|
4123 iso->esc = ISO_ESC_NOTHING;
|
|
4124
|
|
4125 iso->output_literally = 0;
|
|
4126 iso->output_direction_sequence = 0;
|
|
4127
|
|
4128 switch (iso->esc)
|
|
4129 {
|
|
4130 case ISO_ESC_NOTHING:
|
|
4131 iso->esc_bytes_index = 0;
|
|
4132 switch (c)
|
|
4133 {
|
|
4134 case ISO_CODE_ESC: /* Start escape sequence */
|
|
4135 *flags |= CODING_STATE_ESCAPE;
|
|
4136 iso->esc = ISO_ESC;
|
|
4137 goto not_done;
|
|
4138
|
|
4139 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
4140 *flags |= CODING_STATE_ESCAPE;
|
|
4141 iso->esc = ISO_ESC_5_11;
|
|
4142 goto not_done;
|
|
4143
|
|
4144 case ISO_CODE_SO: /* locking shift 1 */
|
|
4145 reg = 1; half = 0;
|
|
4146 goto locking_shift;
|
|
4147 case ISO_CODE_SI: /* locking shift 0 */
|
|
4148 reg = 0; half = 0;
|
|
4149 goto locking_shift;
|
|
4150
|
|
4151 case ISO_CODE_SS2: /* single shift */
|
|
4152 reg = 2;
|
|
4153 goto single_shift;
|
|
4154 case ISO_CODE_SS3: /* single shift */
|
|
4155 reg = 3;
|
|
4156 goto single_shift;
|
|
4157
|
|
4158 default: /* Other control characters */
|
|
4159 return 0;
|
|
4160 }
|
|
4161
|
|
4162 case ISO_ESC:
|
|
4163 switch (c)
|
|
4164 {
|
|
4165 /**** single shift ****/
|
|
4166
|
|
4167 case 'N': /* single shift 2 */
|
|
4168 reg = 2;
|
|
4169 goto single_shift;
|
|
4170 case 'O': /* single shift 3 */
|
|
4171 reg = 3;
|
|
4172 goto single_shift;
|
|
4173
|
|
4174 /**** locking shift ****/
|
|
4175
|
|
4176 case '~': /* locking shift 1 right */
|
|
4177 reg = 1; half = 1;
|
|
4178 goto locking_shift;
|
|
4179 case 'n': /* locking shift 2 */
|
|
4180 reg = 2; half = 0;
|
|
4181 goto locking_shift;
|
|
4182 case '}': /* locking shift 2 right */
|
|
4183 reg = 2; half = 1;
|
|
4184 goto locking_shift;
|
|
4185 case 'o': /* locking shift 3 */
|
|
4186 reg = 3; half = 0;
|
|
4187 goto locking_shift;
|
|
4188 case '|': /* locking shift 3 right */
|
|
4189 reg = 3; half = 1;
|
|
4190 goto locking_shift;
|
|
4191
|
396
|
4192 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
4193 /**** composite ****/
|
|
4194
|
|
4195 case '0':
|
|
4196 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
4197 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
4198 CODING_STATE_COMPOSITE;
|
|
4199 return 1;
|
|
4200
|
|
4201 case '1':
|
|
4202 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
4203 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
4204 ~CODING_STATE_COMPOSITE;
|
|
4205 return 1;
|
396
|
4206 #endif /* ENABLE_COMPOSITE_CHARS */
|
259
|
4207
|
|
4208 /**** directionality ****/
|
|
4209
|
|
4210 case '[':
|
|
4211 iso->esc = ISO_ESC_5_11;
|
|
4212 goto not_done;
|
|
4213
|
|
4214 /**** designation ****/
|
|
4215
|
|
4216 case '$': /* multibyte charset prefix */
|
|
4217 iso->esc = ISO_ESC_2_4;
|
|
4218 goto not_done;
|
|
4219
|
|
4220 default:
|
|
4221 if (0x28 <= c && c <= 0x2F)
|
|
4222 {
|
|
4223 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
|
|
4224 goto not_done;
|
|
4225 }
|
|
4226
|
|
4227 /* This function is called with CODESYS equal to nil when
|
|
4228 doing coding-system detection. */
|
|
4229 if (!NILP (codesys)
|
|
4230 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
4231 && fit_to_be_escape_quoted (c))
|
|
4232 {
|
|
4233 iso->esc = ISO_ESC_LITERAL;
|
|
4234 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
4235 return 1;
|
|
4236 }
|
|
4237
|
|
4238 /* bzzzt! */
|
|
4239 return 0;
|
|
4240 }
|
|
4241
|
|
4242
|
|
4243
|
|
4244 /**** directionality ****/
|
|
4245
|
|
4246 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
4247 if (c == ']')
|
|
4248 {
|
|
4249 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
4250 goto directionality;
|
|
4251 }
|
|
4252 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
4253 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
4254 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
4255 else return 0;
|
|
4256 goto not_done;
|
|
4257
|
|
4258 case ISO_ESC_5_11_0:
|
|
4259 if (c == ']')
|
|
4260 {
|
|
4261 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
4262 goto directionality;
|
|
4263 }
|
|
4264 return 0;
|
|
4265
|
|
4266 case ISO_ESC_5_11_1:
|
|
4267 if (c == ']')
|
|
4268 {
|
|
4269 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
4270 goto directionality;
|
|
4271 }
|
|
4272 return 0;
|
|
4273
|
|
4274 case ISO_ESC_5_11_2:
|
|
4275 if (c == ']')
|
|
4276 {
|
|
4277 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
4278 goto directionality;
|
|
4279 }
|
|
4280 return 0;
|
|
4281
|
|
4282 directionality:
|
|
4283 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
4284 /* Various junk here to attempt to preserve the direction sequences
|
|
4285 literally in the text if they would otherwise be swallowed due
|
|
4286 to invalid designations that don't show up as actual charset
|
|
4287 changes in the text. */
|
|
4288 if (iso->invalid_switch_dir)
|
|
4289 {
|
|
4290 /* We already inserted a direction switch literally into the
|
|
4291 text. We assume (#### this may not be right) that the
|
|
4292 next direction switch is the one going the other way,
|
|
4293 and we need to output that literally as well. */
|
|
4294 iso->output_literally = 1;
|
|
4295 iso->invalid_switch_dir = 0;
|
|
4296 }
|
|
4297 else
|
|
4298 {
|
|
4299 int jj;
|
|
4300
|
|
4301 /* If we are in the thrall of an invalid designation,
|
|
4302 then stick the directionality sequence literally into the
|
|
4303 output stream so it ends up in the original text again. */
|
|
4304 for (jj = 0; jj < 4; jj++)
|
|
4305 if (iso->invalid_designated[jj])
|
|
4306 break;
|
|
4307 if (jj < 4)
|
|
4308 {
|
|
4309 iso->output_literally = 1;
|
|
4310 iso->invalid_switch_dir = 1;
|
|
4311 }
|
|
4312 else
|
|
4313 /* Indicate that we haven't yet seen a valid designation,
|
|
4314 so that if a switch-dir is directly followed by an
|
|
4315 invalid designation, both get inserted literally. */
|
|
4316 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
4317 }
|
|
4318 return 1;
|
|
4319
|
|
4320
|
|
4321 /**** designation ****/
|
|
4322
|
|
4323 case ISO_ESC_2_4:
|
|
4324 if (0x28 <= c && c <= 0x2F)
|
|
4325 {
|
|
4326 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
|
|
4327 goto not_done;
|
|
4328 }
|
|
4329 if (0x40 <= c && c <= 0x42)
|
|
4330 {
|
|
4331 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
4332 *flags & CODING_STATE_R2L ?
|
|
4333 CHARSET_RIGHT_TO_LEFT :
|
|
4334 CHARSET_LEFT_TO_RIGHT);
|
|
4335 reg = 0;
|
|
4336 goto designated;
|
|
4337 }
|
|
4338 return 0;
|
|
4339
|
|
4340 default:
|
|
4341 {
|
|
4342 int type =-1;
|
|
4343
|
|
4344 if (c < '0' || c > '~')
|
|
4345 return 0; /* bad final byte */
|
|
4346
|
|
4347 if (iso->esc >= ISO_ESC_2_8 &&
|
|
4348 iso->esc <= ISO_ESC_2_15)
|
|
4349 {
|
|
4350 type = ((iso->esc >= ISO_ESC_2_12) ?
|
|
4351 CHARSET_TYPE_96 : CHARSET_TYPE_94);
|
|
4352 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
4353 }
|
|
4354 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
4355 iso->esc <= ISO_ESC_2_4_15)
|
|
4356 {
|
|
4357 type = ((iso->esc >= ISO_ESC_2_4_12) ?
|
|
4358 CHARSET_TYPE_96X96 : CHARSET_TYPE_94X94);
|
|
4359 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
4360 }
|
|
4361 else
|
|
4362 {
|
|
4363 /* Can this ever be reached? -slb */
|
|
4364 abort();
|
|
4365 }
|
|
4366
|
|
4367 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
4368 *flags & CODING_STATE_R2L ?
|
|
4369 CHARSET_RIGHT_TO_LEFT :
|
|
4370 CHARSET_LEFT_TO_RIGHT);
|
|
4371 goto designated;
|
|
4372 }
|
|
4373 }
|
|
4374
|
|
4375 not_done:
|
|
4376 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
4377 return -1;
|
|
4378
|
|
4379 single_shift:
|
|
4380 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
4381 /* can't invoke something that ain't there. */
|
|
4382 return 0;
|
|
4383 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
4384 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
4385 if (reg == 2)
|
|
4386 *flags |= CODING_STATE_SS2;
|
|
4387 else
|
|
4388 *flags |= CODING_STATE_SS3;
|
|
4389 return 1;
|
|
4390
|
|
4391 locking_shift:
|
|
4392 if (check_invalid_charsets &&
|
|
4393 !CHARSETP (iso->charset[reg]))
|
|
4394 /* can't invoke something that ain't there. */
|
|
4395 return 0;
|
|
4396 if (half)
|
|
4397 iso->register_right = reg;
|
|
4398 else
|
|
4399 iso->register_left = reg;
|
|
4400 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
4401 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
4402 return 1;
|
|
4403
|
|
4404 designated:
|
|
4405 if (NILP (cs) && check_invalid_charsets)
|
|
4406 {
|
|
4407 iso->invalid_designated[reg] = 1;
|
|
4408 iso->charset[reg] = Vcharset_ascii;
|
|
4409 iso->esc = ISO_ESC_DESIGNATE;
|
|
4410 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
4411 iso->output_literally = 1;
|
|
4412 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
4413 {
|
|
4414 /* We encountered a switch-direction followed by an
|
|
4415 invalid designation. Ensure that the switch-direction
|
|
4416 gets outputted; otherwise it will probably get eaten
|
|
4417 when the text is written out again. */
|
|
4418 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
4419 iso->output_direction_sequence = 1;
|
|
4420 /* And make sure that the switch-dir going the other
|
|
4421 way gets outputted, as well. */
|
|
4422 iso->invalid_switch_dir = 1;
|
|
4423 }
|
|
4424 return 1;
|
|
4425 }
|
|
4426 /* This function is called with CODESYS equal to nil when
|
|
4427 doing coding-system detection. */
|
|
4428 if (!NILP (codesys))
|
|
4429 {
|
|
4430 charset_conversion_spec_dynarr *dyn =
|
|
4431 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
4432
|
|
4433 if (dyn)
|
|
4434 {
|
|
4435 int i;
|
|
4436
|
|
4437 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
4438 {
|
|
4439 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
4440 if (EQ (cs, spec->from_charset))
|
|
4441 cs = spec->to_charset;
|
|
4442 }
|
|
4443 }
|
|
4444 }
|
|
4445
|
|
4446 iso->charset[reg] = cs;
|
|
4447 iso->esc = ISO_ESC_DESIGNATE;
|
|
4448 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
4449 if (iso->invalid_designated[reg])
|
|
4450 {
|
|
4451 iso->invalid_designated[reg] = 0;
|
|
4452 iso->output_literally = 1;
|
|
4453 }
|
|
4454 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
4455 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
4456 return 1;
|
|
4457 }
|
|
4458
|
|
4459 static int
|
412
|
4460 detect_coding_iso2022 (struct detection_state *st, CONST unsigned char *src,
|
259
|
4461 unsigned int n)
|
|
4462 {
|
|
4463 int mask;
|
|
4464
|
|
4465 /* #### There are serious deficiencies in the recognition mechanism
|
388
|
4466 here. This needs to be much smarter if it's going to cut it.
|
|
4467 The sequence "\xff\x0f" is currently detected as LOCK_SHIFT while
|
|
4468 it should be detected as Latin-1.
|
|
4469 All the ISO2022 stuff in this file should be synced up with the
|
|
4470 code from FSF Emacs-20.4, in which Mule should be more or less stable.
|
|
4471 Perhaps we should wait till R2L works in FSF Emacs? */
|
259
|
4472
|
|
4473 if (!st->iso2022.initted)
|
|
4474 {
|
|
4475 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
4476 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
4477 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
4478 CODING_CATEGORY_ISO_8_1_MASK |
|
|
4479 CODING_CATEGORY_ISO_8_2_MASK |
|
|
4480 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
4481 st->iso2022.flags = 0;
|
|
4482 st->iso2022.high_byte_count = 0;
|
|
4483 st->iso2022.saw_single_shift = 0;
|
|
4484 st->iso2022.initted = 1;
|
|
4485 }
|
|
4486
|
|
4487 mask = st->iso2022.mask;
|
|
4488
|
|
4489 while (n--)
|
|
4490 {
|
388
|
4491 int c = *src++;
|
259
|
4492 if (c >= 0xA0)
|
|
4493 {
|
|
4494 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
4495 st->iso2022.high_byte_count++;
|
|
4496 }
|
|
4497 else
|
|
4498 {
|
|
4499 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
4500 {
|
|
4501 if (st->iso2022.high_byte_count & 1)
|
|
4502 /* odd number of high bytes; assume not iso-8-2 */
|
|
4503 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
4504 }
|
|
4505 st->iso2022.high_byte_count = 0;
|
|
4506 st->iso2022.saw_single_shift = 0;
|
|
4507 if (c > 0x80)
|
|
4508 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
4509 }
|
|
4510 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
4511 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
4512 { /* control chars */
|
|
4513 switch (c)
|
|
4514 {
|
|
4515 /* Allow and ignore control characters that you might
|
|
4516 reasonably see in a text file */
|
|
4517 case '\r':
|
|
4518 case '\n':
|
|
4519 case '\t':
|
|
4520 case 7: /* bell */
|
|
4521 case 8: /* backspace */
|
|
4522 case 11: /* vertical tab */
|
|
4523 case 12: /* form feed */
|
|
4524 case 26: /* MS-DOS C-z junk */
|
|
4525 case 31: /* '^_' -- for info */
|
|
4526 goto label_continue_loop;
|
|
4527
|
|
4528 default:
|
|
4529 break;
|
|
4530 }
|
|
4531 }
|
|
4532
|
|
4533 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
4534 || BYTE_C1_P (c))
|
|
4535 {
|
|
4536 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
4537 &st->iso2022.flags, 0))
|
|
4538 {
|
|
4539 switch (st->iso2022.iso.esc)
|
|
4540 {
|
|
4541 case ISO_ESC_DESIGNATE:
|
|
4542 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
4543 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
4544 break;
|
|
4545 case ISO_ESC_LOCKING_SHIFT:
|
|
4546 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
4547 goto ran_out_of_chars;
|
|
4548 case ISO_ESC_SINGLE_SHIFT:
|
|
4549 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
4550 st->iso2022.saw_single_shift = 1;
|
|
4551 break;
|
|
4552 default:
|
|
4553 break;
|
|
4554 }
|
|
4555 }
|
|
4556 else
|
|
4557 {
|
|
4558 mask = 0;
|
|
4559 goto ran_out_of_chars;
|
|
4560 }
|
|
4561 }
|
|
4562 label_continue_loop:;
|
|
4563 }
|
|
4564
|
|
4565 ran_out_of_chars:
|
|
4566
|
|
4567 return mask;
|
|
4568 }
|
|
4569
|
|
4570 static int
|
|
4571 postprocess_iso2022_mask (int mask)
|
|
4572 {
|
|
4573 /* #### kind of cheesy */
|
|
4574 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
4575 entirely seven-bit and turn off the eight-bit ones. */
|
|
4576 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
4577 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
4578 CODING_CATEGORY_ISO_8_1_MASK |
|
|
4579 CODING_CATEGORY_ISO_8_2_MASK);
|
|
4580 return mask;
|
|
4581 }
|
|
4582
|
|
4583 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
4584 output a switch-dir-to-left-to-right sequence to DST.
|
|
4585 Also update FLAGS if it is not a null pointer.
|
|
4586 If INTERNAL_P is set, we are outputting in internal format and
|
|
4587 need to handle the CSI differently. */
|
|
4588
|
|
4589 static void
|
396
|
4590 restore_left_to_right_direction (Lisp_Coding_System *codesys,
|
259
|
4591 unsigned_char_dynarr *dst,
|
|
4592 unsigned int *flags,
|
|
4593 int internal_p)
|
|
4594 {
|
|
4595 if (!flags || (*flags & CODING_STATE_R2L))
|
|
4596 {
|
|
4597 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
4598 {
|
|
4599 Dynarr_add (dst, ISO_CODE_ESC);
|
|
4600 Dynarr_add (dst, '[');
|
|
4601 }
|
|
4602 else if (internal_p)
|
|
4603 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
4604 else
|
|
4605 Dynarr_add (dst, ISO_CODE_CSI);
|
|
4606 Dynarr_add (dst, '0');
|
|
4607 Dynarr_add (dst, ']');
|
|
4608 if (flags)
|
|
4609 *flags &= ~CODING_STATE_R2L;
|
|
4610 }
|
|
4611 }
|
|
4612
|
|
4613 /* If FLAGS is a null pointer or specifies a direction different from
|
|
4614 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
4615 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
4616 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
4617 If INTERNAL_P is set, we are outputting in internal format and
|
|
4618 need to handle the CSI differently. */
|
|
4619
|
|
4620 static void
|
396
|
4621 ensure_correct_direction (int direction, Lisp_Coding_System *codesys,
|
259
|
4622 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
4623 int internal_p)
|
|
4624 {
|
|
4625 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
4626 direction == CHARSET_LEFT_TO_RIGHT)
|
|
4627 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
4628 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
4629 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
4630 direction == CHARSET_RIGHT_TO_LEFT)
|
|
4631 {
|
|
4632 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
4633 {
|
|
4634 Dynarr_add (dst, ISO_CODE_ESC);
|
|
4635 Dynarr_add (dst, '[');
|
|
4636 }
|
|
4637 else if (internal_p)
|
|
4638 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
4639 else
|
|
4640 Dynarr_add (dst, ISO_CODE_CSI);
|
|
4641 Dynarr_add (dst, '2');
|
|
4642 Dynarr_add (dst, ']');
|
|
4643 if (flags)
|
|
4644 *flags |= CODING_STATE_R2L;
|
|
4645 }
|
|
4646 }
|
|
4647
|
|
4648 /* Convert ISO2022-format data to internal format. */
|
|
4649
|
|
4650 static void
|
412
|
4651 decode_coding_iso2022 (Lstream *decoding, CONST unsigned char *src,
|
259
|
4652 unsigned_char_dynarr *dst, unsigned int n)
|
|
4653 {
|
|
4654 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
396
|
4655 unsigned int flags = str->flags;
|
|
4656 unsigned int ch = str->ch;
|
|
4657 eol_type_t eol_type = str->eol_type;
|
|
4658 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
4659 unsigned_char_dynarr *real_dst = dst;
|
396
|
4660 #endif
|
|
4661 Lisp_Object coding_system;
|
|
4662
|
259
|
4663 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
4664
|
396
|
4665 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
4666 if (flags & CODING_STATE_COMPOSITE)
|
|
4667 dst = str->iso2022.composite_chars;
|
396
|
4668 #endif /* ENABLE_COMPOSITE_CHARS */
|
259
|
4669
|
|
4670 while (n--)
|
|
4671 {
|
388
|
4672 unsigned char c = *src++;
|
259
|
4673 if (flags & CODING_STATE_ESCAPE)
|
|
4674 { /* Within ESC sequence */
|
|
4675 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
4676 c, &flags, 1);
|
|
4677
|
|
4678 if (retval)
|
|
4679 {
|
|
4680 switch (str->iso2022.esc)
|
|
4681 {
|
396
|
4682 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
4683 case ISO_ESC_START_COMPOSITE:
|
|
4684 if (str->iso2022.composite_chars)
|
|
4685 Dynarr_reset (str->iso2022.composite_chars);
|
|
4686 else
|
|
4687 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
|
|
4688 dst = str->iso2022.composite_chars;
|
|
4689 break;
|
|
4690 case ISO_ESC_END_COMPOSITE:
|
|
4691 {
|
|
4692 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
4693 Bytecount len;
|
|
4694 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
4695 Dynarr_length (dst));
|
|
4696 dst = real_dst;
|
|
4697 len = set_charptr_emchar (comstr, emch);
|
|
4698 Dynarr_add_many (dst, comstr, len);
|
|
4699 break;
|
|
4700 }
|
396
|
4701 #endif /* ENABLE_COMPOSITE_CHARS */
|
259
|
4702
|
|
4703 case ISO_ESC_LITERAL:
|
|
4704 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
4705 break;
|
|
4706
|
|
4707 default:
|
|
4708 /* Everything else handled already */
|
|
4709 break;
|
|
4710 }
|
|
4711 }
|
|
4712
|
|
4713 /* Attempted error recovery. */
|
|
4714 if (str->iso2022.output_direction_sequence)
|
|
4715 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
4716 CHARSET_RIGHT_TO_LEFT :
|
|
4717 CHARSET_LEFT_TO_RIGHT,
|
|
4718 str->codesys, dst, 0, 1);
|
|
4719 /* More error recovery. */
|
|
4720 if (!retval || str->iso2022.output_literally)
|
|
4721 {
|
|
4722 /* Output the (possibly invalid) sequence */
|
|
4723 int i;
|
|
4724 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
4725 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
4726 flags &= CODING_STATE_ISO2022_LOCK;
|
|
4727 if (!retval)
|
|
4728 n++, src--;/* Repeat the loop with the same character. */
|
|
4729 else
|
|
4730 {
|
|
4731 /* No sense in reprocessing the final byte of the
|
|
4732 escape sequence; it could mess things up anyway.
|
|
4733 Just add it now. */
|
|
4734 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
4735 }
|
|
4736 }
|
|
4737 ch = 0;
|
|
4738 }
|
|
4739 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
4740 { /* Control characters */
|
|
4741
|
|
4742 /***** Error-handling *****/
|
|
4743
|
|
4744 /* If we were in the middle of a character, dump out the
|
|
4745 partial character. */
|
|
4746 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
4747
|
|
4748 /* If we just saw a single-shift character, dump it out.
|
|
4749 This may dump out the wrong sort of single-shift character,
|
|
4750 but least it will give an indication that something went
|
|
4751 wrong. */
|
|
4752 if (flags & CODING_STATE_SS2)
|
|
4753 {
|
|
4754 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
4755 flags &= ~CODING_STATE_SS2;
|
|
4756 }
|
|
4757 if (flags & CODING_STATE_SS3)
|
|
4758 {
|
|
4759 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
4760 flags &= ~CODING_STATE_SS3;
|
|
4761 }
|
|
4762
|
|
4763 /***** Now handle the control characters. *****/
|
|
4764
|
|
4765 /* Handle CR/LF */
|
|
4766 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
4767
|
|
4768 flags &= CODING_STATE_ISO2022_LOCK;
|
|
4769
|
|
4770 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
4771 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
4772 }
|
|
4773 else
|
|
4774 { /* Graphic characters */
|
|
4775 Lisp_Object charset;
|
|
4776 int lb;
|
|
4777 int reg;
|
|
4778
|
|
4779 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
4780
|
|
4781 /* Now determine the charset. */
|
|
4782 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
4783 : (flags & CODING_STATE_SS3) ? 3
|
|
4784 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
4785 : str->iso2022.register_left);
|
|
4786 charset = str->iso2022.charset[reg];
|
|
4787
|
|
4788 /* Error checking: */
|
388
|
4789 if (! CHARSETP (charset)
|
|
4790 || str->iso2022.invalid_designated[reg]
|
259
|
4791 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
4792 && XCHARSET_CHARS (charset) == 94))
|
|
4793 /* Mrmph. We are trying to invoke a register that has no
|
|
4794 or an invalid charset in it, or trying to add a character
|
|
4795 outside the range of the charset. Insert that char literally
|
|
4796 to preserve it for the output. */
|
|
4797 {
|
|
4798 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
4799 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
4800 }
|
|
4801
|
|
4802 else
|
|
4803 {
|
|
4804 /* Things are probably hunky-dorey. */
|
|
4805
|
|
4806 /* Fetch reverse charset, maybe. */
|
|
4807 if (((flags & CODING_STATE_R2L) &&
|
|
4808 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
4809 ||
|
|
4810 (!(flags & CODING_STATE_R2L) &&
|
|
4811 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
4812 {
|
|
4813 Lisp_Object new_charset =
|
|
4814 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
4815 if (!NILP (new_charset))
|
|
4816 charset = new_charset;
|
|
4817 }
|
|
4818
|
|
4819 lb = XCHARSET_LEADING_BYTE (charset);
|
|
4820 switch (XCHARSET_REP_BYTES (charset))
|
|
4821 {
|
|
4822 case 1: /* ASCII */
|
|
4823 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
4824 Dynarr_add (dst, c & 0x7F);
|
|
4825 break;
|
|
4826
|
|
4827 case 2: /* one-byte official */
|
|
4828 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
4829 Dynarr_add (dst, lb);
|
|
4830 Dynarr_add (dst, c | 0x80);
|
|
4831 break;
|
|
4832
|
|
4833 case 3: /* one-byte private or two-byte official */
|
|
4834 if (XCHARSET_PRIVATE_P (charset))
|
|
4835 {
|
|
4836 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
4837 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
4838 Dynarr_add (dst, lb);
|
|
4839 Dynarr_add (dst, c | 0x80);
|
|
4840 }
|
|
4841 else
|
|
4842 {
|
|
4843 if (ch)
|
|
4844 {
|
|
4845 Dynarr_add (dst, lb);
|
|
4846 Dynarr_add (dst, ch | 0x80);
|
|
4847 Dynarr_add (dst, c | 0x80);
|
|
4848 ch = 0;
|
|
4849 }
|
|
4850 else
|
|
4851 ch = c;
|
|
4852 }
|
|
4853 break;
|
|
4854
|
|
4855 default: /* two-byte private */
|
|
4856 if (ch)
|
|
4857 {
|
|
4858 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
4859 Dynarr_add (dst, lb);
|
|
4860 Dynarr_add (dst, ch | 0x80);
|
|
4861 Dynarr_add (dst, c | 0x80);
|
|
4862 ch = 0;
|
|
4863 }
|
|
4864 else
|
|
4865 ch = c;
|
|
4866 }
|
|
4867 }
|
|
4868
|
|
4869 if (!ch)
|
|
4870 flags &= CODING_STATE_ISO2022_LOCK;
|
|
4871 }
|
|
4872
|
|
4873 label_continue_loop:;
|
|
4874 }
|
|
4875
|
|
4876 if (flags & CODING_STATE_END)
|
|
4877 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
4878
|
396
|
4879 str->flags = flags;
|
|
4880 str->ch = ch;
|
259
|
4881 }
|
|
4882
|
|
4883
|
|
4884 /***** ISO2022 encoder *****/
|
|
4885
|
|
4886 /* Designate CHARSET into register REG. */
|
|
4887
|
|
4888 static void
|
|
4889 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
4890 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
4891 {
|
412
|
4892 static CONST char inter94[] = "()*+";
|
|
4893 static CONST char inter96[] = ",-./";
|
272
|
4894 unsigned int type;
|
259
|
4895 unsigned char final;
|
|
4896 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
4897
|
|
4898 str->iso2022.charset[reg] = charset;
|
|
4899 if (!CHARSETP (charset))
|
|
4900 /* charset might be an initial nil or t. */
|
|
4901 return;
|
|
4902 type = XCHARSET_TYPE (charset);
|
|
4903 final = XCHARSET_FINAL (charset);
|
|
4904 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
4905 CHARSETP (old_charset) &&
|
|
4906 XCHARSET_TYPE (old_charset) == type &&
|
|
4907 XCHARSET_FINAL (old_charset) == final)
|
|
4908 return;
|
|
4909
|
|
4910 str->iso2022.force_charset_on_output[reg] = 0;
|
|
4911
|
|
4912 {
|
|
4913 charset_conversion_spec_dynarr *dyn =
|
|
4914 str->codesys->iso2022.output_conv;
|
|
4915
|
|
4916 if (dyn)
|
|
4917 {
|
|
4918 int i;
|
|
4919
|
|
4920 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
4921 {
|
|
4922 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
4923 if (EQ (charset, spec->from_charset))
|
|
4924 charset = spec->to_charset;
|
|
4925 }
|
|
4926 }
|
|
4927 }
|
|
4928
|
|
4929 Dynarr_add (dst, ISO_CODE_ESC);
|
|
4930 switch (type)
|
|
4931 {
|
|
4932 case CHARSET_TYPE_94:
|
|
4933 Dynarr_add (dst, inter94[reg]);
|
|
4934 break;
|
|
4935 case CHARSET_TYPE_96:
|
|
4936 Dynarr_add (dst, inter96[reg]);
|
|
4937 break;
|
|
4938 case CHARSET_TYPE_94X94:
|
|
4939 Dynarr_add (dst, '$');
|
|
4940 if (reg != 0
|
|
4941 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
4942 || final < '@'
|
|
4943 || final > 'B')
|
|
4944 Dynarr_add (dst, inter94[reg]);
|
|
4945 break;
|
|
4946 case CHARSET_TYPE_96X96:
|
|
4947 Dynarr_add (dst, '$');
|
|
4948 Dynarr_add (dst, inter96[reg]);
|
|
4949 break;
|
|
4950 }
|
|
4951 Dynarr_add (dst, final);
|
|
4952 }
|
|
4953
|
|
4954 static void
|
|
4955 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
4956 {
|
|
4957 if (str->iso2022.register_left != 0)
|
|
4958 {
|
|
4959 Dynarr_add (dst, ISO_CODE_SI);
|
|
4960 str->iso2022.register_left = 0;
|
|
4961 }
|
|
4962 }
|
|
4963
|
|
4964 static void
|
|
4965 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
4966 {
|
|
4967 if (str->iso2022.register_left != 1)
|
|
4968 {
|
|
4969 Dynarr_add (dst, ISO_CODE_SO);
|
|
4970 str->iso2022.register_left = 1;
|
|
4971 }
|
|
4972 }
|
|
4973
|
|
4974 /* Convert internally-formatted data to ISO2022 format. */
|
|
4975
|
|
4976 static void
|
412
|
4977 encode_coding_iso2022 (Lstream *encoding, CONST unsigned char *src,
|
259
|
4978 unsigned_char_dynarr *dst, unsigned int n)
|
|
4979 {
|
|
4980 unsigned char charmask, c;
|
|
4981 unsigned char char_boundary;
|
|
4982 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
396
|
4983 unsigned int flags = str->flags;
|
|
4984 unsigned int ch = str->ch;
|
|
4985 Lisp_Coding_System *codesys = str->codesys;
|
|
4986 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
259
|
4987 int i;
|
|
4988 Lisp_Object charset;
|
|
4989 int half;
|
|
4990
|
396
|
4991 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
4992 /* flags for handling composite chars. We do a little switcharoo
|
|
4993 on the source while we're outputting the composite char. */
|
|
4994 unsigned int saved_n = 0;
|
412
|
4995 CONST unsigned char *saved_src = NULL;
|
259
|
4996 int in_composite = 0;
|
396
|
4997 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
4998
|
259
|
4999 char_boundary = str->iso2022.current_char_boundary;
|
|
5000 charset = str->iso2022.current_charset;
|
|
5001 half = str->iso2022.current_half;
|
|
5002
|
396
|
5003 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
5004 back_to_square_n:
|
396
|
5005 #endif
|
259
|
5006 while (n--)
|
|
5007 {
|
|
5008 c = *src++;
|
|
5009
|
|
5010 if (BYTE_ASCII_P (c))
|
|
5011 { /* Processing ASCII character */
|
|
5012 ch = 0;
|
|
5013
|
|
5014 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
5015
|
|
5016 /* Make sure G0 contains ASCII */
|
|
5017 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
5018 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
5019 {
|
|
5020 ensure_normal_shift (str, dst);
|
|
5021 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
5022 }
|
|
5023
|
|
5024 /* If necessary, restore everything to the default state
|
|
5025 at end-of-line */
|
|
5026 if (c == '\n' &&
|
|
5027 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
5028 {
|
|
5029 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
5030
|
|
5031 ensure_normal_shift (str, dst);
|
|
5032
|
|
5033 for (i = 0; i < 4; i++)
|
|
5034 {
|
|
5035 Lisp_Object initial_charset =
|
|
5036 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
5037 iso2022_designate (initial_charset, i, str, dst);
|
|
5038 }
|
|
5039 }
|
|
5040 if (c == '\n')
|
|
5041 {
|
|
5042 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
5043 Dynarr_add (dst, '\r');
|
|
5044 if (eol_type != EOL_CR)
|
|
5045 Dynarr_add (dst, c);
|
|
5046 }
|
|
5047 else
|
|
5048 {
|
|
5049 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
5050 && fit_to_be_escape_quoted (c))
|
|
5051 Dynarr_add (dst, ISO_CODE_ESC);
|
|
5052 Dynarr_add (dst, c);
|
|
5053 }
|
|
5054 char_boundary = 1;
|
|
5055 }
|
|
5056
|
|
5057 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
5058 { /* Processing Leading Byte */
|
|
5059 ch = 0;
|
|
5060 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
5061 if (LEADING_BYTE_PREFIX_P(c))
|
|
5062 ch = c;
|
|
5063 else if (!EQ (charset, Vcharset_control_1)
|
396
|
5064 #ifdef ENABLE_COMPOSITE_CHARS
|
|
5065 && !EQ (charset, Vcharset_composite)
|
|
5066 #endif
|
|
5067 )
|
259
|
5068 {
|
|
5069 int reg;
|
|
5070
|
|
5071 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
5072 codesys, dst, &flags, 0);
|
|
5073
|
|
5074 /* Now determine which register to use. */
|
|
5075 reg = -1;
|
|
5076 for (i = 0; i < 4; i++)
|
|
5077 {
|
|
5078 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
5079 EQ (charset,
|
|
5080 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
5081 {
|
|
5082 reg = i;
|
|
5083 break;
|
|
5084 }
|
|
5085 }
|
|
5086
|
|
5087 if (reg == -1)
|
|
5088 {
|
|
5089 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
5090 {
|
|
5091 if (!NILP (str->iso2022.charset[1]) &&
|
|
5092 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
5093 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
5094 reg = 1;
|
|
5095 else if (!NILP (str->iso2022.charset[2]))
|
|
5096 reg = 2;
|
|
5097 else if (!NILP (str->iso2022.charset[3]))
|
|
5098 reg = 3;
|
|
5099 else
|
|
5100 reg = 0;
|
|
5101 }
|
|
5102 else
|
|
5103 reg = 0;
|
|
5104 }
|
|
5105
|
|
5106 iso2022_designate (charset, reg, str, dst);
|
|
5107
|
|
5108 /* Now invoke that register. */
|
|
5109 switch (reg)
|
|
5110 {
|
|
5111 case 0:
|
|
5112 ensure_normal_shift (str, dst);
|
|
5113 half = 0;
|
|
5114 break;
|
|
5115
|
|
5116 case 1:
|
|
5117 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
5118 {
|
|
5119 ensure_shift_out (str, dst);
|
|
5120 half = 0;
|
|
5121 }
|
|
5122 else
|
|
5123 half = 1;
|
|
5124 break;
|
|
5125
|
|
5126 case 2:
|
|
5127 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
5128 {
|
|
5129 Dynarr_add (dst, ISO_CODE_ESC);
|
|
5130 Dynarr_add (dst, 'N');
|
|
5131 half = 0;
|
|
5132 }
|
|
5133 else
|
|
5134 {
|
|
5135 Dynarr_add (dst, ISO_CODE_SS2);
|
|
5136 half = 1;
|
|
5137 }
|
|
5138 break;
|
|
5139
|
|
5140 case 3:
|
|
5141 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
5142 {
|
|
5143 Dynarr_add (dst, ISO_CODE_ESC);
|
|
5144 Dynarr_add (dst, 'O');
|
|
5145 half = 0;
|
|
5146 }
|
|
5147 else
|
|
5148 {
|
|
5149 Dynarr_add (dst, ISO_CODE_SS3);
|
|
5150 half = 1;
|
|
5151 }
|
|
5152 break;
|
|
5153
|
|
5154 default:
|
|
5155 abort ();
|
|
5156 }
|
|
5157 }
|
|
5158 char_boundary = 0;
|
|
5159 }
|
|
5160 else
|
|
5161 { /* Processing Non-ASCII character */
|
|
5162 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
5163 char_boundary = 1;
|
|
5164 if (EQ (charset, Vcharset_control_1))
|
|
5165 {
|
|
5166 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
5167 && fit_to_be_escape_quoted (c))
|
|
5168 Dynarr_add (dst, ISO_CODE_ESC);
|
|
5169 /* you asked for it ... */
|
|
5170 Dynarr_add (dst, c - 0x20);
|
|
5171 }
|
|
5172 else
|
|
5173 {
|
|
5174 switch (XCHARSET_REP_BYTES (charset))
|
|
5175 {
|
|
5176 case 2:
|
|
5177 Dynarr_add (dst, c & charmask);
|
|
5178 break;
|
|
5179 case 3:
|
|
5180 if (XCHARSET_PRIVATE_P (charset))
|
|
5181 {
|
|
5182 Dynarr_add (dst, c & charmask);
|
|
5183 ch = 0;
|
|
5184 }
|
|
5185 else if (ch)
|
|
5186 {
|
396
|
5187 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
5188 if (EQ (charset, Vcharset_composite))
|
|
5189 {
|
|
5190 if (in_composite)
|
|
5191 {
|
|
5192 /* #### Bother! We don't know how to
|
|
5193 handle this yet. */
|
|
5194 Dynarr_add (dst, '~');
|
|
5195 }
|
|
5196 else
|
|
5197 {
|
|
5198 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
5199 ch & 0x7F, c & 0x7F);
|
|
5200 Lisp_Object lstr = composite_char_string (emch);
|
|
5201 saved_n = n;
|
|
5202 saved_src = src;
|
|
5203 in_composite = 1;
|
|
5204 src = XSTRING_DATA (lstr);
|
|
5205 n = XSTRING_LENGTH (lstr);
|
|
5206 Dynarr_add (dst, ISO_CODE_ESC);
|
|
5207 Dynarr_add (dst, '0'); /* start composing */
|
|
5208 }
|
|
5209 }
|
|
5210 else
|
396
|
5211 #endif /* ENABLE_COMPOSITE_CHARS */
|
259
|
5212 {
|
|
5213 Dynarr_add (dst, ch & charmask);
|
|
5214 Dynarr_add (dst, c & charmask);
|
|
5215 }
|
|
5216 ch = 0;
|
|
5217 }
|
|
5218 else
|
|
5219 {
|
|
5220 ch = c;
|
|
5221 char_boundary = 0;
|
|
5222 }
|
|
5223 break;
|
|
5224 case 4:
|
|
5225 if (ch)
|
|
5226 {
|
|
5227 Dynarr_add (dst, ch & charmask);
|
|
5228 Dynarr_add (dst, c & charmask);
|
|
5229 ch = 0;
|
|
5230 }
|
|
5231 else
|
|
5232 {
|
|
5233 ch = c;
|
|
5234 char_boundary = 0;
|
|
5235 }
|
|
5236 break;
|
|
5237 default:
|
|
5238 abort ();
|
|
5239 }
|
|
5240 }
|
|
5241 }
|
|
5242 }
|
|
5243
|
396
|
5244 #ifdef ENABLE_COMPOSITE_CHARS
|
259
|
5245 if (in_composite)
|
|
5246 {
|
|
5247 n = saved_n;
|
|
5248 src = saved_src;
|
|
5249 in_composite = 0;
|
|
5250 Dynarr_add (dst, ISO_CODE_ESC);
|
|
5251 Dynarr_add (dst, '1'); /* end composing */
|
|
5252 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
5253 }
|
396
|
5254 #endif /* ENABLE_COMPOSITE_CHARS */
|
259
|
5255
|
|
5256 if (char_boundary && flags & CODING_STATE_END)
|
|
5257 {
|
|
5258 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
5259 ensure_normal_shift (str, dst);
|
|
5260 for (i = 0; i < 4; i++)
|
|
5261 {
|
|
5262 Lisp_Object initial_charset =
|
|
5263 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
5264 iso2022_designate (initial_charset, i, str, dst);
|
|
5265 }
|
|
5266 }
|
|
5267
|
396
|
5268 str->flags = flags;
|
|
5269 str->ch = ch;
|
259
|
5270 str->iso2022.current_char_boundary = char_boundary;
|
|
5271 str->iso2022.current_charset = charset;
|
|
5272 str->iso2022.current_half = half;
|
|
5273
|
|
5274 /* Verbum caro factum est! */
|
|
5275 }
|
|
5276 #endif /* MULE */
|
|
5277
|
|
5278 /************************************************************************/
|
|
5279 /* No-conversion methods */
|
|
5280 /************************************************************************/
|
|
5281
|
|
5282 /* This is used when reading in "binary" files -- i.e. files that may
|
|
5283 contain all 256 possible byte values and that are not to be
|
|
5284 interpreted as being in any particular decoding. */
|
|
5285 static void
|
412
|
5286 decode_coding_no_conversion (Lstream *decoding, CONST unsigned char *src,
|
259
|
5287 unsigned_char_dynarr *dst, unsigned int n)
|
|
5288 {
|
|
5289 unsigned char c;
|
|
5290 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
396
|
5291 unsigned int flags = str->flags;
|
|
5292 unsigned int ch = str->ch;
|
|
5293 eol_type_t eol_type = str->eol_type;
|
259
|
5294
|
|
5295 while (n--)
|
|
5296 {
|
|
5297 c = *src++;
|
|
5298
|
|
5299 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
5300 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
5301 label_continue_loop:;
|
|
5302 }
|
|
5303
|
|
5304 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
5305
|
396
|
5306 str->flags = flags;
|
|
5307 str->ch = ch;
|
259
|
5308 }
|
|
5309
|
|
5310 static void
|
412
|
5311 encode_coding_no_conversion (Lstream *encoding, CONST unsigned char *src,
|
259
|
5312 unsigned_char_dynarr *dst, unsigned int n)
|
|
5313 {
|
|
5314 unsigned char c;
|
|
5315 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
396
|
5316 unsigned int flags = str->flags;
|
|
5317 unsigned int ch = str->ch;
|
|
5318 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
259
|
5319
|
|
5320 while (n--)
|
|
5321 {
|
|
5322 c = *src++;
|
|
5323 if (c == '\n')
|
|
5324 {
|
|
5325 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
5326 Dynarr_add (dst, '\r');
|
|
5327 if (eol_type != EOL_CR)
|
|
5328 Dynarr_add (dst, '\n');
|
|
5329 ch = 0;
|
|
5330 }
|
|
5331 else if (BYTE_ASCII_P (c))
|
|
5332 {
|
|
5333 assert (ch == 0);
|
|
5334 Dynarr_add (dst, c);
|
|
5335 }
|
|
5336 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
5337 {
|
|
5338 assert (ch == 0);
|
|
5339 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
5340 c == LEADING_BYTE_CONTROL_1)
|
|
5341 ch = c;
|
|
5342 else
|
|
5343 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
5344 }
|
|
5345 else
|
|
5346 {
|
|
5347 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
5348 Dynarr_add (dst, c);
|
|
5349 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
5350 {
|
|
5351 assert (c < 0xC0);
|
|
5352 Dynarr_add (dst, c - 0x20);
|
|
5353 }
|
|
5354 /* else it should be the second or third byte of an
|
|
5355 untranslatable character, so ignore it */
|
|
5356 ch = 0;
|
|
5357 }
|
|
5358 }
|
|
5359
|
396
|
5360 str->flags = flags;
|
|
5361 str->ch = ch;
|
259
|
5362 }
|
|
5363
|
|
5364
|
412
|
5365 /************************************************************************/
|
|
5366 /* Simple internal/external functions */
|
|
5367 /************************************************************************/
|
|
5368
|
|
5369 static Extbyte_dynarr *conversion_out_dynarr;
|
|
5370 static Bufbyte_dynarr *conversion_in_dynarr;
|
|
5371
|
|
5372 /* Determine coding system from coding format */
|
|
5373
|
|
5374 /* #### not correct for all values of `fmt'! */
|
|
5375 static Lisp_Object
|
|
5376 external_data_format_to_coding_system (enum external_data_format fmt)
|
|
5377 {
|
|
5378 switch (fmt)
|
|
5379 {
|
|
5380 case FORMAT_FILENAME:
|
|
5381 case FORMAT_TERMINAL:
|
|
5382 if (EQ (Vfile_name_coding_system, Qnil) ||
|
|
5383 EQ (Vfile_name_coding_system, Qbinary))
|
|
5384 return Qnil;
|
|
5385 else
|
|
5386 return Fget_coding_system (Vfile_name_coding_system);
|
|
5387 #ifdef MULE
|
|
5388 case FORMAT_CTEXT:
|
|
5389 return Fget_coding_system (Qctext);
|
|
5390 #endif
|
|
5391 default:
|
|
5392 return Qnil;
|
|
5393 }
|
|
5394 }
|
|
5395
|
|
5396 Extbyte *
|
|
5397 convert_to_external_format (CONST Bufbyte *ptr,
|
|
5398 Bytecount len,
|
|
5399 Extcount *len_out,
|
|
5400 enum external_data_format fmt)
|
|
5401 {
|
|
5402 Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
|
|
5403
|
|
5404 if (!conversion_out_dynarr)
|
|
5405 conversion_out_dynarr = Dynarr_new (Extbyte);
|
|
5406 else
|
|
5407 Dynarr_reset (conversion_out_dynarr);
|
|
5408
|
|
5409 if (NILP (coding_system))
|
|
5410 {
|
|
5411 CONST Bufbyte *end = ptr + len;
|
|
5412
|
|
5413 for (; ptr < end;)
|
|
5414 {
|
|
5415 Bufbyte c =
|
|
5416 (BYTE_ASCII_P (*ptr)) ? *ptr :
|
|
5417 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
|
|
5418 (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
|
|
5419 '~';
|
|
5420
|
|
5421 Dynarr_add (conversion_out_dynarr, (Extbyte) c);
|
|
5422 INC_CHARPTR (ptr);
|
|
5423 }
|
|
5424
|
|
5425 #ifdef ERROR_CHECK_BUFPOS
|
|
5426 assert (ptr == end);
|
|
5427 #endif
|
|
5428 }
|
|
5429 else
|
|
5430 {
|
|
5431 Lisp_Object instream, outstream, da_outstream;
|
|
5432 Lstream *istr, *ostr;
|
|
5433 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
5434 char tempbuf[1024]; /* some random amount */
|
|
5435
|
|
5436 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
5437 da_outstream = make_dynarr_output_stream
|
|
5438 ((unsigned_char_dynarr *) conversion_out_dynarr);
|
|
5439 outstream =
|
|
5440 make_encoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
5441 istr = XLSTREAM (instream);
|
|
5442 ostr = XLSTREAM (outstream);
|
|
5443 GCPRO3 (instream, outstream, da_outstream);
|
|
5444 while (1)
|
|
5445 {
|
|
5446 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
5447 if (!size_in_bytes)
|
|
5448 break;
|
|
5449 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
5450 }
|
|
5451 Lstream_close (istr);
|
|
5452 Lstream_close (ostr);
|
|
5453 UNGCPRO;
|
|
5454 Lstream_delete (istr);
|
|
5455 Lstream_delete (ostr);
|
|
5456 Lstream_delete (XLSTREAM (da_outstream));
|
|
5457 }
|
|
5458
|
|
5459 *len_out = Dynarr_length (conversion_out_dynarr);
|
|
5460 Dynarr_add (conversion_out_dynarr, 0); /* remember to zero-terminate! */
|
|
5461 return Dynarr_atp (conversion_out_dynarr, 0);
|
|
5462 }
|
|
5463
|
|
5464 Bufbyte *
|
|
5465 convert_from_external_format (CONST Extbyte *ptr,
|
|
5466 Extcount len,
|
|
5467 Bytecount *len_out,
|
|
5468 enum external_data_format fmt)
|
|
5469 {
|
|
5470 Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
|
|
5471
|
|
5472 if (!conversion_in_dynarr)
|
|
5473 conversion_in_dynarr = Dynarr_new (Bufbyte);
|
|
5474 else
|
|
5475 Dynarr_reset (conversion_in_dynarr);
|
|
5476
|
|
5477 if (NILP (coding_system))
|
|
5478 {
|
|
5479 CONST Extbyte *end = ptr + len;
|
|
5480 for (; ptr < end; ptr++)
|
|
5481 {
|
|
5482 Extbyte c = *ptr;
|
|
5483 DECODE_ADD_BINARY_CHAR (c, conversion_in_dynarr);
|
|
5484 }
|
|
5485 }
|
|
5486 else
|
|
5487 {
|
|
5488 Lisp_Object instream, outstream, da_outstream;
|
|
5489 Lstream *istr, *ostr;
|
|
5490 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
5491 char tempbuf[1024]; /* some random amount */
|
|
5492
|
|
5493 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
5494 da_outstream = make_dynarr_output_stream
|
|
5495 ((unsigned_char_dynarr *) conversion_in_dynarr);
|
|
5496 outstream =
|
|
5497 make_decoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
5498 istr = XLSTREAM (instream);
|
|
5499 ostr = XLSTREAM (outstream);
|
|
5500 GCPRO3 (instream, outstream, da_outstream);
|
|
5501 while (1)
|
|
5502 {
|
|
5503 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
5504 if (!size_in_bytes)
|
|
5505 break;
|
|
5506 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
5507 }
|
|
5508 Lstream_close (istr);
|
|
5509 Lstream_close (ostr);
|
|
5510 UNGCPRO;
|
|
5511 Lstream_delete (istr);
|
|
5512 Lstream_delete (ostr);
|
|
5513 Lstream_delete (XLSTREAM (da_outstream));
|
|
5514 }
|
|
5515
|
|
5516 *len_out = Dynarr_length (conversion_in_dynarr);
|
|
5517 Dynarr_add (conversion_in_dynarr, 0); /* remember to zero-terminate! */
|
|
5518 return Dynarr_atp (conversion_in_dynarr, 0);
|
|
5519 }
|
|
5520
|
|
5521
|
259
|
5522 /************************************************************************/
|
|
5523 /* Initialization */
|
|
5524 /************************************************************************/
|
|
5525
|
|
5526 void
|
414
|
5527 syms_of_file_coding (void)
|
259
|
5528 {
|
|
5529 deferror (&Qcoding_system_error, "coding-system-error",
|
|
5530 "Coding-system error", Qio_error);
|
|
5531
|
|
5532 DEFSUBR (Fcoding_system_p);
|
|
5533 DEFSUBR (Ffind_coding_system);
|
|
5534 DEFSUBR (Fget_coding_system);
|
|
5535 DEFSUBR (Fcoding_system_list);
|
|
5536 DEFSUBR (Fcoding_system_name);
|
|
5537 DEFSUBR (Fmake_coding_system);
|
|
5538 DEFSUBR (Fcopy_coding_system);
|
398
|
5539 DEFSUBR (Fdefine_coding_system_alias);
|
259
|
5540 DEFSUBR (Fsubsidiary_coding_system);
|
|
5541
|
|
5542 DEFSUBR (Fcoding_system_type);
|
|
5543 DEFSUBR (Fcoding_system_doc_string);
|
|
5544 #ifdef MULE
|
|
5545 DEFSUBR (Fcoding_system_charset);
|
|
5546 #endif
|
|
5547 DEFSUBR (Fcoding_system_property);
|
|
5548
|
|
5549 DEFSUBR (Fcoding_category_list);
|
|
5550 DEFSUBR (Fset_coding_priority_list);
|
|
5551 DEFSUBR (Fcoding_priority_list);
|
|
5552 DEFSUBR (Fset_coding_category_system);
|
|
5553 DEFSUBR (Fcoding_category_system);
|
|
5554
|
|
5555 DEFSUBR (Fdetect_coding_region);
|
|
5556 DEFSUBR (Fdecode_coding_region);
|
|
5557 DEFSUBR (Fencode_coding_region);
|
|
5558 #ifdef MULE
|
|
5559 DEFSUBR (Fdecode_shift_jis_char);
|
|
5560 DEFSUBR (Fencode_shift_jis_char);
|
|
5561 DEFSUBR (Fdecode_big5_char);
|
|
5562 DEFSUBR (Fencode_big5_char);
|
396
|
5563 DEFSUBR (Fset_ucs_char);
|
|
5564 DEFSUBR (Fucs_char);
|
|
5565 DEFSUBR (Fset_char_ucs);
|
|
5566 DEFSUBR (Fchar_ucs);
|
259
|
5567 #endif /* MULE */
|
424
|
5568 defsymbol (&Qcoding_systemp, "coding-system-p");
|
259
|
5569 defsymbol (&Qno_conversion, "no-conversion");
|
416
|
5570 defsymbol (&Qraw_text, "raw-text");
|
259
|
5571 #ifdef MULE
|
|
5572 defsymbol (&Qbig5, "big5");
|
|
5573 defsymbol (&Qshift_jis, "shift-jis");
|
396
|
5574 defsymbol (&Qucs4, "ucs-4");
|
|
5575 defsymbol (&Qutf8, "utf-8");
|
259
|
5576 defsymbol (&Qccl, "ccl");
|
|
5577 defsymbol (&Qiso2022, "iso2022");
|
|
5578 #endif /* MULE */
|
|
5579 defsymbol (&Qmnemonic, "mnemonic");
|
|
5580 defsymbol (&Qeol_type, "eol-type");
|
|
5581 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
5582 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
5583
|
|
5584 defsymbol (&Qcr, "cr");
|
|
5585 defsymbol (&Qlf, "lf");
|
|
5586 defsymbol (&Qcrlf, "crlf");
|
|
5587 defsymbol (&Qeol_cr, "eol-cr");
|
|
5588 defsymbol (&Qeol_lf, "eol-lf");
|
|
5589 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
5590 #ifdef MULE
|
|
5591 defsymbol (&Qcharset_g0, "charset-g0");
|
|
5592 defsymbol (&Qcharset_g1, "charset-g1");
|
|
5593 defsymbol (&Qcharset_g2, "charset-g2");
|
|
5594 defsymbol (&Qcharset_g3, "charset-g3");
|
|
5595 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
5596 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
5597 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
5598 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
5599 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
5600 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
5601 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
272
|
5602
|
259
|
5603 defsymbol (&Qshort, "short");
|
|
5604 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
5605 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
5606 defsymbol (&Qseven, "seven");
|
|
5607 defsymbol (&Qlock_shift, "lock-shift");
|
|
5608 defsymbol (&Qescape_quoted, "escape-quoted");
|
272
|
5609 #endif /* MULE */
|
259
|
5610 defsymbol (&Qencode, "encode");
|
|
5611 defsymbol (&Qdecode, "decode");
|
|
5612
|
|
5613 #ifdef MULE
|
412
|
5614 defsymbol (&Qctext, "ctext");
|
259
|
5615 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
5616 "shift-jis");
|
|
5617 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
5618 "big5");
|
396
|
5619 defsymbol (&coding_category_symbol[CODING_CATEGORY_UCS4],
|
|
5620 "ucs-4");
|
|
5621 defsymbol (&coding_category_symbol[CODING_CATEGORY_UTF8],
|
|
5622 "utf-8");
|
259
|
5623 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
5624 "iso-7");
|
|
5625 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
5626 "iso-8-designate");
|
|
5627 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
5628 "iso-8-1");
|
|
5629 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
5630 "iso-8-2");
|
|
5631 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
5632 "iso-lock-shift");
|
272
|
5633 #endif /* MULE */
|
259
|
5634 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
5635 "no-conversion");
|
|
5636 }
|
|
5637
|
|
5638 void
|
414
|
5639 lstream_type_create_file_coding (void)
|
259
|
5640 {
|
|
5641 LSTREAM_HAS_METHOD (decoding, reader);
|
|
5642 LSTREAM_HAS_METHOD (decoding, writer);
|
|
5643 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
5644 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
5645 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
5646 LSTREAM_HAS_METHOD (decoding, closer);
|
|
5647 LSTREAM_HAS_METHOD (decoding, marker);
|
|
5648
|
|
5649 LSTREAM_HAS_METHOD (encoding, reader);
|
|
5650 LSTREAM_HAS_METHOD (encoding, writer);
|
|
5651 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
5652 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
5653 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
5654 LSTREAM_HAS_METHOD (encoding, closer);
|
|
5655 LSTREAM_HAS_METHOD (encoding, marker);
|
|
5656 }
|
|
5657
|
|
5658 void
|
414
|
5659 vars_of_file_coding (void)
|
259
|
5660 {
|
|
5661 int i;
|
|
5662
|
424
|
5663 fcd = xnew (struct file_coding_dump);
|
|
5664 dumpstruct (&fcd, &fcd_description);
|
|
5665
|
259
|
5666 /* Initialize to something reasonable ... */
|
|
5667 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
5668 {
|
424
|
5669 fcd->coding_category_system[i] = Qnil;
|
|
5670 fcd->coding_category_by_priority[i] = i;
|
259
|
5671 }
|
|
5672
|
|
5673 Fprovide (intern ("file-coding"));
|
|
5674
|
|
5675 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
5676 Coding system used for TTY keyboard input.
|
|
5677 Not used under a windowing system.
|
|
5678 */ );
|
|
5679 Vkeyboard_coding_system = Qnil;
|
|
5680
|
|
5681 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
5682 Coding system used for TTY display output.
|
|
5683 Not used under a windowing system.
|
|
5684 */ );
|
|
5685 Vterminal_coding_system = Qnil;
|
|
5686
|
|
5687 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
412
|
5688 Overriding coding system used when writing a file or process.
|
|
5689 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
5690 the coding system that will be used when a file or process is read
|
|
5691 in, and overrides `buffer-file-coding-system-for-read',
|
259
|
5692 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
412
|
5693 this one for permanent changes to the environment.
|
|
5694 */ );
|
259
|
5695 Vcoding_system_for_read = Qnil;
|
|
5696
|
|
5697 DEFVAR_LISP ("coding-system-for-write",
|
|
5698 &Vcoding_system_for_write /*
|
412
|
5699 Overriding coding system used when writing a file or process.
|
|
5700 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
5701 the coding system that will be used when a file or process is wrote
|
|
5702 in, and overrides `buffer-file-coding-system',
|
|
5703 `write-region-pre-hook', etc. Use those variables instead of this one
|
|
5704 for permanent changes to the environment.
|
|
5705 */ );
|
259
|
5706 Vcoding_system_for_write = Qnil;
|
|
5707
|
|
5708 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
5709 Coding system used to convert pathnames when accessing files.
|
|
5710 */ );
|
|
5711 Vfile_name_coding_system = Qnil;
|
|
5712
|
|
5713 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
5714 Non-nil means the buffer contents are regarded as multi-byte form
|
|
5715 of characters, not a binary code. This affects the display, file I/O,
|
|
5716 and behaviors of various editing commands.
|
|
5717
|
|
5718 Setting this to nil does not do anything.
|
|
5719 */ );
|
|
5720 enable_multibyte_characters = 1;
|
|
5721 }
|
|
5722
|
|
5723 void
|
414
|
5724 complex_vars_of_file_coding (void)
|
259
|
5725 {
|
380
|
5726 staticpro (&Vcoding_system_hash_table);
|
|
5727 Vcoding_system_hash_table =
|
|
5728 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
259
|
5729
|
|
5730 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
|
424
|
5731 dumpstruct (&the_codesys_prop_dynarr, &codesys_prop_dynarr_description);
|
259
|
5732
|
|
5733 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
5734 { \
|
|
5735 struct codesys_prop csp; \
|
|
5736 csp.sym = (Sym); \
|
|
5737 csp.prop_type = (Prop_Type); \
|
|
5738 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
5739 } while (0)
|
|
5740
|
|
5741 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
5742 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
5743 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
5744 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
5745 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
5746 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
5747 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
5748 #ifdef MULE
|
|
5749 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
5750 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
5751 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
5752 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
5753 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
5754 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
5755 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
5756 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
5757 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
5758 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
5759 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
5760 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
5761 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
5762 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
5763 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
5764 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
5765 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
5766
|
|
5767 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
5768 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
5769 #endif /* MULE */
|
|
5770 /* Need to create this here or we're really screwed. */
|
416
|
5771 Fmake_coding_system
|
|
5772 (Qraw_text, Qno_conversion,
|
|
5773 build_string ("Raw text, which means it converts only line-break-codes."),
|
|
5774 list2 (Qmnemonic, build_string ("Raw")));
|
|
5775
|
|
5776 Fmake_coding_system
|
|
5777 (Qbinary, Qno_conversion,
|
|
5778 build_string ("Binary, which means it does not convert anything."),
|
|
5779 list4 (Qeol_type, Qlf,
|
|
5780 Qmnemonic, build_string ("Binary")));
|
|
5781
|
|
5782 Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
|
259
|
5783
|
|
5784 /* Need this for bootstrapping */
|
424
|
5785 fcd->coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
416
|
5786 Fget_coding_system (Qraw_text);
|
396
|
5787
|
|
5788 #ifdef MULE
|
|
5789 {
|
|
5790 unsigned int i;
|
|
5791
|
|
5792 for (i = 0; i < 65536; i++)
|
424
|
5793 fcd->ucs_to_mule_table[i] = Qnil;
|
396
|
5794 }
|
|
5795 staticpro (&mule_to_ucs_table);
|
|
5796 mule_to_ucs_table = Fmake_char_table(Qgeneric);
|
|
5797 #endif /* MULE */
|
259
|
5798 }
|