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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
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.3. Not in FSF. */
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23
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298
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24 /* Rewritten by Ben Wing <ben@xemacs.org>. */
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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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412
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39 Lisp_Object Qbuffer_file_coding_system, 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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412
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50 /* Coding system currently associated with each coding category. */
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51 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
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52
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53 /* Table of all coding categories in decreasing order of priority.
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54 This describes a permutation of the possible coding categories. */
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55 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
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56
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57 Lisp_Object Qcoding_system_p;
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58
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416
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59 Lisp_Object Qraw_text, Qno_conversion, Qccl, Qiso2022;
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259
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60 /* Qinternal in general.c */
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61
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62 Lisp_Object Qmnemonic, Qeol_type;
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63 Lisp_Object Qcr, Qcrlf, Qlf;
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64 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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65 Lisp_Object Qpost_read_conversion;
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66 Lisp_Object Qpre_write_conversion;
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67
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68 #ifdef MULE
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396
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69 Lisp_Object Qucs4, Qutf8;
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259
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70 Lisp_Object Qbig5, Qshift_jis;
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71 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
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72 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
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73 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
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74 Lisp_Object Qno_iso6429;
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75 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
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412
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76 Lisp_Object Qctext, Qescape_quoted;
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259
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77 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
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263
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78 #endif
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79 Lisp_Object Qencode, Qdecode;
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259
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80
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380
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81 Lisp_Object Vcoding_system_hash_table;
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259
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82
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83 int enable_multibyte_characters;
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84
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85 #ifdef MULE
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86 /* Additional information used by the ISO2022 decoder and detector. */
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87 struct iso2022_decoder
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88 {
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89 /* CHARSET holds the character sets currently assigned to the G0
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90 through G3 variables. It is initialized from the array
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91 INITIAL_CHARSET in CODESYS. */
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92 Lisp_Object charset[4];
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93
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94 /* Which registers are currently invoked into the left (GL) and
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95 right (GR) halves of the 8-bit encoding space? */
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96 int register_left, register_right;
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97
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98 /* ISO_ESC holds a value indicating part of an escape sequence
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99 that has already been seen. */
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100 enum iso_esc_flag esc;
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101
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102 /* This records the bytes we've seen so far in an escape sequence,
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103 in case the sequence is invalid (we spit out the bytes unchanged). */
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104 unsigned char esc_bytes[8];
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105
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106 /* Index for next byte to store in ISO escape sequence. */
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107 int esc_bytes_index;
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108
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396
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109 #ifdef ENABLE_COMPOSITE_CHARS
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259
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110 /* Stuff seen so far when composing a string. */
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111 unsigned_char_dynarr *composite_chars;
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396
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112 #endif
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259
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113
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114 /* If we saw an invalid designation sequence for a particular
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115 register, we flag it here and switch to ASCII. The next time we
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116 see a valid designation for this register, we turn off the flag
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117 and do the designation normally, but pretend the sequence was
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118 invalid. The effect of all this is that (most of the time) the
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119 escape sequences for both the switch to the unknown charset, and
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120 the switch back to the known charset, get inserted literally into
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121 the buffer and saved out as such. The hope is that we can
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122 preserve the escape sequences so that the resulting written out
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123 file makes sense. If we don't do any of this, the designation
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124 to the invalid charset will be preserved but that switch back
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125 to the known charset will probably get eaten because it was
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126 the same charset that was already present in the register. */
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127 unsigned char invalid_designated[4];
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128
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129 /* We try to do similar things as above for direction-switching
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130 sequences. If we encountered a direction switch while an
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131 invalid designation was present, or an invalid designation
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132 just after a direction switch (i.e. no valid designation
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133 encountered yet), we insert the direction-switch escape
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134 sequence literally into the output stream, and later on
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135 insert the corresponding direction-restoring escape sequence
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136 literally also. */
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137 unsigned int switched_dir_and_no_valid_charset_yet :1;
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138 unsigned int invalid_switch_dir :1;
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139
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140 /* Tells the decoder to output the escape sequence literally
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141 even though it was valid. Used in the games we play to
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142 avoid lossage when we encounter invalid designations. */
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143 unsigned int output_literally :1;
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144 /* We encountered a direction switch followed by an invalid
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145 designation. We didn't output the direction switch
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146 literally because we didn't know about the invalid designation;
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147 but we have to do so now. */
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148 unsigned int output_direction_sequence :1;
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149 };
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272
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150 #endif /* MULE */
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151 EXFUN (Fcopy_coding_system, 2);
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259
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152 #ifdef MULE
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153 struct detection_state;
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154 static int detect_coding_sjis (struct detection_state *st,
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412
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155 CONST unsigned char *src,
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259
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156 unsigned int n);
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157 static void decode_coding_sjis (Lstream *decoding,
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412
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158 CONST unsigned char *src,
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259
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159 unsigned_char_dynarr *dst,
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160 unsigned int n);
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161 static void encode_coding_sjis (Lstream *encoding,
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412
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162 CONST unsigned char *src,
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259
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163 unsigned_char_dynarr *dst,
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164 unsigned int n);
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165 static int detect_coding_big5 (struct detection_state *st,
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412
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166 CONST unsigned char *src,
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259
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167 unsigned int n);
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168 static void decode_coding_big5 (Lstream *decoding,
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412
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169 CONST unsigned char *src,
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259
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170 unsigned_char_dynarr *dst, unsigned int n);
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171 static void encode_coding_big5 (Lstream *encoding,
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412
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172 CONST unsigned char *src,
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259
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173 unsigned_char_dynarr *dst, unsigned int n);
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396
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174 static int detect_coding_ucs4 (struct detection_state *st,
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412
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175 CONST unsigned char *src,
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396
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176 unsigned int n);
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177 static void decode_coding_ucs4 (Lstream *decoding,
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412
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178 CONST unsigned char *src,
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396
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179 unsigned_char_dynarr *dst, unsigned int n);
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180 static void encode_coding_ucs4 (Lstream *encoding,
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412
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181 CONST unsigned char *src,
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396
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182 unsigned_char_dynarr *dst, unsigned int n);
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183 static int detect_coding_utf8 (struct detection_state *st,
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412
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184 CONST unsigned char *src,
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396
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185 unsigned int n);
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186 static void decode_coding_utf8 (Lstream *decoding,
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412
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187 CONST unsigned char *src,
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396
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188 unsigned_char_dynarr *dst, unsigned int n);
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189 static void encode_coding_utf8 (Lstream *encoding,
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412
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190 CONST unsigned char *src,
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396
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191 unsigned_char_dynarr *dst, unsigned int n);
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259
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192 static int postprocess_iso2022_mask (int mask);
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193 static void reset_iso2022 (Lisp_Object coding_system,
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194 struct iso2022_decoder *iso);
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195 static int detect_coding_iso2022 (struct detection_state *st,
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412
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196 CONST unsigned char *src,
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259
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197 unsigned int n);
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198 static void decode_coding_iso2022 (Lstream *decoding,
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412
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199 CONST unsigned char *src,
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259
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200 unsigned_char_dynarr *dst, unsigned int n);
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201 static void encode_coding_iso2022 (Lstream *encoding,
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412
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202 CONST unsigned char *src,
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259
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203 unsigned_char_dynarr *dst, unsigned int n);
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204 #endif /* MULE */
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205 static void decode_coding_no_conversion (Lstream *decoding,
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412
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206 CONST unsigned char *src,
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259
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207 unsigned_char_dynarr *dst,
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208 unsigned int n);
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209 static void encode_coding_no_conversion (Lstream *encoding,
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412
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210 CONST unsigned char *src,
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259
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211 unsigned_char_dynarr *dst,
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212 unsigned int n);
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412
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213 static void mule_decode (Lstream *decoding, CONST unsigned char *src,
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259
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214 unsigned_char_dynarr *dst, unsigned int n);
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412
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215 static void mule_encode (Lstream *encoding, CONST unsigned char *src,
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259
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216 unsigned_char_dynarr *dst, unsigned int n);
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217
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218 typedef struct codesys_prop codesys_prop;
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219 struct codesys_prop
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220 {
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221 Lisp_Object sym;
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222 int prop_type;
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223 };
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224
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225 typedef struct
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226 {
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227 Dynarr_declare (codesys_prop);
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228 } codesys_prop_dynarr;
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229
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230 codesys_prop_dynarr *the_codesys_prop_dynarr;
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231
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232 enum codesys_prop_enum
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233 {
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234 CODESYS_PROP_ALL_OK,
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235 CODESYS_PROP_ISO2022,
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236 CODESYS_PROP_CCL
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237 };
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238
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239
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240 /************************************************************************/
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241 /* Coding system functions */
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242 /************************************************************************/
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243
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412
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244 static Lisp_Object mark_coding_system (Lisp_Object, void (*) (Lisp_Object));
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259
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245 static void print_coding_system (Lisp_Object, Lisp_Object, int);
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246 static void finalize_coding_system (void *header, int for_disksave);
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247
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420
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248 #ifdef MULE
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249 static const struct lrecord_description ccs_description_1[] = {
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250 { XD_LISP_OBJECT, offsetof(charset_conversion_spec, from_charset), 2 },
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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 ccs_description = {
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255 sizeof(charset_conversion_spec),
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256 ccs_description_1
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257 };
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258
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259 static const struct lrecord_description ccsd_description_1[] = {
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260 XD_DYNARR_DESC(charset_conversion_spec_dynarr, &ccs_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 ccsd_description = {
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265 sizeof(charset_conversion_spec_dynarr),
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266 ccsd_description_1
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267 };
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268 #endif
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269
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270 static const struct lrecord_description coding_system_description[] = {
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271 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, name), 2 },
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272 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, mnemonic), 3 },
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273 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, eol_lf), 3 },
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274 #ifdef MULE
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275 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, iso2022.initial_charset), 4 },
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276 { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
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277 { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
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278 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, ccl.decode), 2 },
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279 #endif
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280 { XD_END }
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281 };
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282
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259
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283 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
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284 mark_coding_system, print_coding_system,
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285 finalize_coding_system,
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420
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286 0, 0, coding_system_description,
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287 struct Lisp_Coding_System);
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259
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288
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289 static Lisp_Object
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412
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290 mark_coding_system (Lisp_Object obj, void (*markobj) (Lisp_Object))
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259
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291 {
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396
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292 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
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259
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293
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412
|
294 markobj (CODING_SYSTEM_NAME (codesys));
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295 markobj (CODING_SYSTEM_DOC_STRING (codesys));
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296 markobj (CODING_SYSTEM_MNEMONIC (codesys));
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297 markobj (CODING_SYSTEM_EOL_LF (codesys));
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298 markobj (CODING_SYSTEM_EOL_CRLF (codesys));
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299 markobj (CODING_SYSTEM_EOL_CR (codesys));
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259
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300
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301 switch (CODING_SYSTEM_TYPE (codesys))
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302 {
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303 #ifdef MULE
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304 int i;
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305 case CODESYS_ISO2022:
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306 for (i = 0; i < 4; i++)
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412
|
307 markobj (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
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259
|
308 if (codesys->iso2022.input_conv)
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309 {
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310 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
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311 {
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312 struct charset_conversion_spec *ccs =
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313 Dynarr_atp (codesys->iso2022.input_conv, i);
|
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412
|
314 markobj (ccs->from_charset);
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315 markobj (ccs->to_charset);
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259
|
316 }
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317 }
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318 if (codesys->iso2022.output_conv)
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319 {
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320 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
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321 {
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322 struct charset_conversion_spec *ccs =
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323 Dynarr_atp (codesys->iso2022.output_conv, i);
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|
412
|
324 markobj (ccs->from_charset);
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|
325 markobj (ccs->to_charset);
|
|
259
|
326 }
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|
|
327 }
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|
328 break;
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329
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|
|
330 case CODESYS_CCL:
|
|
412
|
331 markobj (CODING_SYSTEM_CCL_DECODE (codesys));
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|
|
332 markobj (CODING_SYSTEM_CCL_ENCODE (codesys));
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|
259
|
333 break;
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272
|
334 #endif /* MULE */
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259
|
335 default:
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|
336 break;
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|
|
337 }
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|
|
338
|
|
412
|
339 markobj (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
|
|
259
|
340 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
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|
|
341 }
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|
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342
|
|
|
343 static void
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|
|
344 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
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|
|
345 int escapeflag)
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|
|
346 {
|
|
396
|
347 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
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|
259
|
348 if (print_readably)
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|
|
349 error ("printing unreadable object #<coding_system 0x%x>",
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|
|
350 c->header.uid);
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|
351
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|
|
352 write_c_string ("#<coding_system ", printcharfun);
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|
|
353 print_internal (c->name, printcharfun, 1);
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|
|
354 write_c_string (">", printcharfun);
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|
|
355 }
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|
|
356
|
|
|
357 static void
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|
|
358 finalize_coding_system (void *header, int for_disksave)
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|
|
359 {
|
|
396
|
360 Lisp_Coding_System *c = (Lisp_Coding_System *) header;
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|
259
|
361 /* Since coding systems never go away, this function is not
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|
|
362 necessary. But it would be necessary if we changed things
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|
|
363 so that coding systems could go away. */
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|
|
364 if (!for_disksave) /* see comment in lstream.c */
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|
|
365 {
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|
|
366 switch (CODING_SYSTEM_TYPE (c))
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|
|
367 {
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|
|
368 #ifdef MULE
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|
|
369 case CODESYS_ISO2022:
|
|
|
370 if (c->iso2022.input_conv)
|
|
|
371 {
|
|
|
372 Dynarr_free (c->iso2022.input_conv);
|
|
|
373 c->iso2022.input_conv = 0;
|
|
|
374 }
|
|
|
375 if (c->iso2022.output_conv)
|
|
|
376 {
|
|
|
377 Dynarr_free (c->iso2022.output_conv);
|
|
|
378 c->iso2022.output_conv = 0;
|
|
|
379 }
|
|
|
380 break;
|
|
272
|
381 #endif /* MULE */
|
|
259
|
382 default:
|
|
|
383 break;
|
|
|
384 }
|
|
|
385 }
|
|
|
386 }
|
|
|
387
|
|
412
|
388 static enum eol_type
|
|
259
|
389 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
390 {
|
|
|
391 CHECK_SYMBOL (symbol);
|
|
|
392 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
393 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
394 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
395 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
396
|
|
|
397 signal_simple_error ("Unrecognized eol type", symbol);
|
|
|
398 return EOL_AUTODETECT; /* not reached */
|
|
|
399 }
|
|
|
400
|
|
|
401 static Lisp_Object
|
|
412
|
402 eol_type_to_symbol (enum eol_type type)
|
|
259
|
403 {
|
|
|
404 switch (type)
|
|
|
405 {
|
|
380
|
406 default: abort ();
|
|
259
|
407 case EOL_LF: return Qlf;
|
|
|
408 case EOL_CRLF: return Qcrlf;
|
|
|
409 case EOL_CR: return Qcr;
|
|
|
410 case EOL_AUTODETECT: return Qnil;
|
|
|
411 }
|
|
|
412 }
|
|
|
413
|
|
|
414 static void
|
|
396
|
415 setup_eol_coding_systems (Lisp_Coding_System *codesys)
|
|
259
|
416 {
|
|
272
|
417 Lisp_Object codesys_obj;
|
|
259
|
418 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
|
|
|
419 char *codesys_name = (char *) alloca (len + 7);
|
|
261
|
420 int mlen = -1;
|
|
265
|
421 char *codesys_mnemonic=0;
|
|
259
|
422
|
|
|
423 Lisp_Object codesys_name_sym, sub_codesys_obj;
|
|
|
424
|
|
|
425 /* kludge */
|
|
|
426
|
|
|
427 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
428
|
|
|
429 memcpy (codesys_name,
|
|
|
430 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
|
|
|
431
|
|
261
|
432 if (STRINGP (CODING_SYSTEM_MNEMONIC (codesys)))
|
|
|
433 {
|
|
272
|
434 mlen = XSTRING_LENGTH (CODING_SYSTEM_MNEMONIC (codesys));
|
|
261
|
435 codesys_mnemonic = (char *) alloca (mlen + 7);
|
|
|
436 memcpy (codesys_mnemonic,
|
|
|
437 XSTRING_DATA (CODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
|
438 }
|
|
259
|
439
|
|
272
|
440 #define DEFINE_SUB_CODESYS(op_sys, op_sys_abbr, Type) do { \
|
|
|
441 strcpy (codesys_name + len, "-" op_sys); \
|
|
|
442 if (mlen != -1) \
|
|
|
443 strcpy (codesys_mnemonic + mlen, op_sys_abbr); \
|
|
|
444 codesys_name_sym = intern (codesys_name); \
|
|
|
445 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
|
|
|
446 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
|
|
|
447 if (mlen != -1) \
|
|
|
448 XCODING_SYSTEM_MNEMONIC(sub_codesys_obj) = \
|
|
|
449 build_string (codesys_mnemonic); \
|
|
|
450 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
|
|
259
|
451 } while (0)
|
|
|
452
|
|
|
453 DEFINE_SUB_CODESYS("unix", "", EOL_LF);
|
|
263
|
454 DEFINE_SUB_CODESYS("dos", ":T", EOL_CRLF);
|
|
|
455 DEFINE_SUB_CODESYS("mac", ":t", EOL_CR);
|
|
259
|
456 }
|
|
|
457
|
|
|
458 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
272
|
459 Return t if OBJECT is a coding system.
|
|
259
|
460 A coding system is an object that defines how text containing multiple
|
|
|
461 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
462 The coding system is used to decode the stream into a series of
|
|
|
463 characters (which may be from multiple charsets) when the text is read
|
|
|
464 from a file or process, and is used to encode the text back into the
|
|
|
465 same format when it is written out to a file or process.
|
|
|
466
|
|
|
467 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
468 Text, which is used for inter-client data under the X Window System)
|
|
|
469 use escape sequences to switch between different charsets -- Japanese
|
|
|
470 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
471 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
|
472 `make-coding-system' for more information.
|
|
|
473
|
|
|
474 Coding systems are normally identified using a symbol, and the
|
|
|
475 symbol is accepted in place of the actual coding system object whenever
|
|
|
476 a coding system is called for. (This is similar to how faces work.)
|
|
|
477 */
|
|
|
478 (object))
|
|
|
479 {
|
|
|
480 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
481 }
|
|
|
482
|
|
|
483 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
484 Retrieve the coding system of the given name.
|
|
|
485
|
|
|
486 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
487 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
488 If there is no such coding system, nil is returned. Otherwise the
|
|
|
489 associated coding system object is returned.
|
|
|
490 */
|
|
|
491 (coding_system_or_name))
|
|
|
492 {
|
|
412
|
493 if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
494 return coding_system_or_name;
|
|
|
495
|
|
259
|
496 if (NILP (coding_system_or_name))
|
|
|
497 coding_system_or_name = Qbinary;
|
|
272
|
498 else
|
|
|
499 CHECK_SYMBOL (coding_system_or_name);
|
|
259
|
500
|
|
412
|
501 return Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
|
259
|
502 }
|
|
|
503
|
|
|
504 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
505 Retrieve the coding system of the given name.
|
|
|
506 Same as `find-coding-system' except that if there is no such
|
|
|
507 coding system, an error is signaled instead of returning nil.
|
|
|
508 */
|
|
|
509 (name))
|
|
|
510 {
|
|
|
511 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
512
|
|
|
513 if (NILP (coding_system))
|
|
|
514 signal_simple_error ("No such coding system", name);
|
|
|
515 return coding_system;
|
|
|
516 }
|
|
|
517
|
|
|
518 /* We store the coding systems in hash tables with the names as the key and the
|
|
|
519 actual coding system object as the value. Occasionally we need to use them
|
|
|
520 in a list format. These routines provide us with that. */
|
|
|
521 struct coding_system_list_closure
|
|
|
522 {
|
|
|
523 Lisp_Object *coding_system_list;
|
|
|
524 };
|
|
|
525
|
|
|
526 static int
|
|
380
|
527 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
|
|
259
|
528 void *coding_system_list_closure)
|
|
|
529 {
|
|
|
530 /* This function can GC */
|
|
|
531 struct coding_system_list_closure *cscl =
|
|
|
532 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
380
|
533 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
|
534
|
|
412
|
535 *coding_system_list = Fcons (XCODING_SYSTEM (value)->name,
|
|
|
536 *coding_system_list);
|
|
259
|
537 return 0;
|
|
|
538 }
|
|
|
539
|
|
|
540 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
|
541 Return a list of the names of all defined coding systems.
|
|
|
542 */
|
|
|
543 ())
|
|
|
544 {
|
|
|
545 Lisp_Object coding_system_list = Qnil;
|
|
|
546 struct gcpro gcpro1;
|
|
|
547 struct coding_system_list_closure coding_system_list_closure;
|
|
|
548
|
|
|
549 GCPRO1 (coding_system_list);
|
|
|
550 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
380
|
551 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
|
259
|
552 &coding_system_list_closure);
|
|
|
553 UNGCPRO;
|
|
|
554
|
|
|
555 return coding_system_list;
|
|
|
556 }
|
|
|
557
|
|
|
558 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
559 Return the name of the given coding system.
|
|
|
560 */
|
|
|
561 (coding_system))
|
|
|
562 {
|
|
|
563 coding_system = Fget_coding_system (coding_system);
|
|
|
564 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
565 }
|
|
|
566
|
|
396
|
567 static Lisp_Coding_System *
|
|
259
|
568 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
|
|
|
569 {
|
|
396
|
570 Lisp_Coding_System *codesys =
|
|
398
|
571 alloc_lcrecord_type (Lisp_Coding_System, &lrecord_coding_system);
|
|
259
|
572
|
|
|
573 zero_lcrecord (codesys);
|
|
|
574 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
575 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
|
576 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
|
577 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
578 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
579 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
|
580 CODING_SYSTEM_TYPE (codesys) = type;
|
|
261
|
581 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
|
|
259
|
582 #ifdef MULE
|
|
|
583 if (type == CODESYS_ISO2022)
|
|
|
584 {
|
|
|
585 int i;
|
|
|
586 for (i = 0; i < 4; i++)
|
|
|
587 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
|
588 }
|
|
|
589 else if (type == CODESYS_CCL)
|
|
|
590 {
|
|
|
591 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
|
592 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
|
593 }
|
|
272
|
594 #endif /* MULE */
|
|
259
|
595 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
596
|
|
|
597 return codesys;
|
|
|
598 }
|
|
|
599
|
|
|
600 #ifdef MULE
|
|
|
601 /* Given a list of charset conversion specs as specified in a Lisp
|
|
|
602 program, parse it into STORE_HERE. */
|
|
|
603
|
|
|
604 static void
|
|
|
605 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
|
606 Lisp_Object spec_list)
|
|
|
607 {
|
|
|
608 Lisp_Object rest;
|
|
|
609
|
|
|
610 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
|
611 {
|
|
|
612 Lisp_Object car = XCAR (rest);
|
|
|
613 Lisp_Object from, to;
|
|
|
614 struct charset_conversion_spec spec;
|
|
|
615
|
|
|
616 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
|
617 signal_simple_error ("Invalid charset conversion spec", car);
|
|
|
618 from = Fget_charset (XCAR (car));
|
|
|
619 to = Fget_charset (XCAR (XCDR (car)));
|
|
|
620 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
|
621 signal_simple_error_2
|
|
|
622 ("Attempted conversion between different charset types",
|
|
|
623 from, to);
|
|
|
624 spec.from_charset = from;
|
|
|
625 spec.to_charset = to;
|
|
|
626
|
|
|
627 Dynarr_add (store_here, spec);
|
|
|
628 }
|
|
|
629 }
|
|
|
630
|
|
|
631 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
|
632 specs, return the equivalent as the Lisp programmer would see it.
|
|
|
633
|
|
|
634 If LOAD_HERE is 0, return Qnil. */
|
|
|
635
|
|
|
636 static Lisp_Object
|
|
|
637 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
|
638 {
|
|
|
639 int i;
|
|
272
|
640 Lisp_Object result;
|
|
259
|
641
|
|
|
642 if (!load_here)
|
|
|
643 return Qnil;
|
|
272
|
644 for (i = 0, result = Qnil; i < Dynarr_length (load_here); i++)
|
|
259
|
645 {
|
|
272
|
646 struct charset_conversion_spec *ccs = Dynarr_atp (load_here, i);
|
|
259
|
647 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
|
648 }
|
|
|
649
|
|
|
650 return Fnreverse (result);
|
|
|
651 }
|
|
|
652
|
|
272
|
653 #endif /* MULE */
|
|
259
|
654
|
|
|
655 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
656 Register symbol NAME as a coding system.
|
|
|
657
|
|
|
658 TYPE describes the conversion method used and should be one of
|
|
|
659
|
|
|
660 nil or 'undecided
|
|
|
661 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
662 used in the file.
|
|
|
663 'no-conversion
|
|
|
664 No conversion. Use this for binary files and such. On output,
|
|
|
665 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
666 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
667 characters will only be present if you explicitly insert them.)
|
|
|
668 'shift-jis
|
|
|
669 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
396
|
670 'ucs-4
|
|
|
671 ISO 10646 UCS-4 encoding.
|
|
|
672 'utf-8
|
|
|
673 ISO 10646 UTF-8 encoding.
|
|
259
|
674 'iso2022
|
|
|
675 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
676 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
677 standard Unix encoding for Japanese and other languages), and
|
|
|
678 Compound Text (the encoding used in X11). You can specify more
|
|
371
|
679 specific information about the conversion with the FLAGS argument.
|
|
259
|
680 'big5
|
|
|
681 Big5 (the encoding commonly used for Taiwanese).
|
|
|
682 'ccl
|
|
|
683 The conversion is performed using a user-written pseudo-code
|
|
|
684 program. CCL (Code Conversion Language) is the name of this
|
|
|
685 pseudo-code.
|
|
|
686 'internal
|
|
|
687 Write out or read in the raw contents of the memory representing
|
|
|
688 the buffer's text. This is primarily useful for debugging
|
|
|
689 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
690 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
691 WARNING: Reading in a file using 'internal conversion can result
|
|
|
692 in an internal inconsistency in the memory representing a
|
|
|
693 buffer's text, which will produce unpredictable results and may
|
|
|
694 cause XEmacs to crash. Under normal circumstances you should
|
|
|
695 never use 'internal conversion.
|
|
|
696
|
|
|
697 DOC-STRING is a string describing the coding system.
|
|
|
698
|
|
|
699 PROPS is a property list, describing the specific nature of the
|
|
|
700 character set. Recognized properties are:
|
|
|
701
|
|
|
702 'mnemonic
|
|
|
703 String to be displayed in the modeline when this coding system is
|
|
|
704 active.
|
|
|
705
|
|
|
706 'eol-type
|
|
|
707 End-of-line conversion to be used. It should be one of
|
|
|
708
|
|
|
709 nil
|
|
|
710 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
711 or CR). Also generate subsidiary coding systems named
|
|
|
712 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
713 identical to this coding system but have an EOL-TYPE
|
|
|
714 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
715 'lf
|
|
|
716 The end of a line is marked externally using ASCII LF.
|
|
|
717 Since this is also the way that XEmacs represents an
|
|
|
718 end-of-line internally, specifying this option results
|
|
|
719 in no end-of-line conversion. This is the standard
|
|
|
720 format for Unix text files.
|
|
|
721 'crlf
|
|
|
722 The end of a line is marked externally using ASCII
|
|
|
723 CRLF. This is the standard format for MS-DOS text
|
|
|
724 files.
|
|
|
725 'cr
|
|
|
726 The end of a line is marked externally using ASCII CR.
|
|
|
727 This is the standard format for Macintosh text files.
|
|
|
728 t
|
|
|
729 Automatically detect the end-of-line type but do not
|
|
|
730 generate subsidiary coding systems. (This value is
|
|
|
731 converted to nil when stored internally, and
|
|
|
732 `coding-system-property' will return nil.)
|
|
|
733
|
|
|
734 'post-read-conversion
|
|
|
735 Function called after a file has been read in, to perform the
|
|
|
736 decoding. Called with two arguments, BEG and END, denoting
|
|
|
737 a region of the current buffer to be decoded.
|
|
|
738
|
|
|
739 'pre-write-conversion
|
|
|
740 Function called before a file is written out, to perform the
|
|
|
741 encoding. Called with two arguments, BEG and END, denoting
|
|
|
742 a region of the current buffer to be encoded.
|
|
|
743
|
|
|
744
|
|
|
745 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
746
|
|
|
747 'charset-g0
|
|
|
748 'charset-g1
|
|
|
749 'charset-g2
|
|
|
750 'charset-g3
|
|
|
751 The character set initially designated to the G0 - G3 registers.
|
|
|
752 The value should be one of
|
|
|
753
|
|
|
754 -- A charset object (designate that character set)
|
|
|
755 -- nil (do not ever use this register)
|
|
|
756 -- t (no character set is initially designated to
|
|
|
757 the register, but may be later on; this automatically
|
|
|
758 sets the corresponding `force-g*-on-output' property)
|
|
|
759
|
|
|
760 'force-g0-on-output
|
|
|
761 'force-g1-on-output
|
|
|
762 'force-g2-on-output
|
|
|
763 'force-g2-on-output
|
|
|
764 If non-nil, send an explicit designation sequence on output before
|
|
|
765 using the specified register.
|
|
|
766
|
|
|
767 'short
|
|
|
768 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
769 "ESC $ B" on output in place of the full designation sequences
|
|
|
770 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
|
771
|
|
|
772 'no-ascii-eol
|
|
|
773 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
774 Setting this to non-nil also suppresses other state-resetting that
|
|
|
775 normally happens at the end of a line.
|
|
|
776
|
|
|
777 'no-ascii-cntl
|
|
|
778 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
779
|
|
|
780 'seven
|
|
|
781 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
782 environment.
|
|
|
783
|
|
|
784 'lock-shift
|
|
|
785 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
786 or designation by escape sequence.
|
|
|
787
|
|
|
788 'no-iso6429
|
|
|
789 If non-nil, don't use ISO6429's direction specification.
|
|
|
790
|
|
|
791 'escape-quoted
|
|
|
792 If non-nil, literal control characters that are the same as
|
|
|
793 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
794 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
795 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
|
796 so that they can be properly distinguished from an escape sequence.
|
|
|
797 (Note that doing this results in a non-portable encoding.) This
|
|
|
798 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
799 is a good choice for a quoting character because there are no
|
|
|
800 escape sequences whose second byte is a character from the Control-0
|
|
|
801 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
802 ISO2022 standard.
|
|
|
803
|
|
|
804 'input-charset-conversion
|
|
|
805 A list of conversion specifications, specifying conversion of
|
|
|
806 characters in one charset to another when decoding is performed.
|
|
|
807 Each specification is a list of two elements: the source charset,
|
|
|
808 and the destination charset.
|
|
|
809
|
|
|
810 'output-charset-conversion
|
|
|
811 A list of conversion specifications, specifying conversion of
|
|
|
812 characters in one charset to another when encoding is performed.
|
|
|
813 The form of each specification is the same as for
|
|
|
814 'input-charset-conversion.
|
|
|
815
|
|
|
816
|
|
|
817 The following additional properties are recognized (and required)
|
|
|
818 if TYPE is 'ccl:
|
|
|
819
|
|
|
820 'decode
|
|
|
821 CCL program used for decoding (converting to internal format).
|
|
|
822
|
|
|
823 'encode
|
|
|
824 CCL program used for encoding (converting to external format).
|
|
|
825 */
|
|
|
826 (name, type, doc_string, props))
|
|
|
827 {
|
|
396
|
828 Lisp_Coding_System *codesys;
|
|
259
|
829 Lisp_Object rest, key, value;
|
|
|
830 enum coding_system_type ty;
|
|
|
831 int need_to_setup_eol_systems = 1;
|
|
|
832
|
|
|
833 /* Convert type to constant */
|
|
|
834 if (NILP (type) || EQ (type, Qundecided))
|
|
|
835 { ty = CODESYS_AUTODETECT; }
|
|
|
836 #ifdef MULE
|
|
|
837 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
|
838 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
|
839 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
|
396
|
840 else if (EQ (type, Qucs4)) { ty = CODESYS_UCS4; }
|
|
|
841 else if (EQ (type, Qutf8)) { ty = CODESYS_UTF8; }
|
|
259
|
842 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
|
843 #endif
|
|
|
844 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
|
845 #ifdef DEBUG_XEMACS
|
|
|
846 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
|
847 #endif
|
|
|
848 else
|
|
|
849 signal_simple_error ("Invalid coding system type", type);
|
|
|
850
|
|
|
851 CHECK_SYMBOL (name);
|
|
|
852
|
|
|
853 codesys = allocate_coding_system (ty, name);
|
|
|
854
|
|
|
855 if (NILP (doc_string))
|
|
|
856 doc_string = build_string ("");
|
|
|
857 else
|
|
|
858 CHECK_STRING (doc_string);
|
|
|
859 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
|
860
|
|
|
861 EXTERNAL_PROPERTY_LIST_LOOP (rest, key, value, props)
|
|
|
862 {
|
|
|
863 if (EQ (key, Qmnemonic))
|
|
|
864 {
|
|
|
865 if (!NILP (value))
|
|
|
866 CHECK_STRING (value);
|
|
|
867 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
|
868 }
|
|
|
869
|
|
|
870 else if (EQ (key, Qeol_type))
|
|
|
871 {
|
|
|
872 need_to_setup_eol_systems = NILP (value);
|
|
|
873 if (EQ (value, Qt))
|
|
|
874 value = Qnil;
|
|
|
875 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
|
876 }
|
|
|
877
|
|
|
878 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
|
879 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
|
880 #ifdef MULE
|
|
|
881 else if (ty == CODESYS_ISO2022)
|
|
|
882 {
|
|
|
883 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
|
884 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
|
885 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
|
886
|
|
|
887 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
|
888 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
|
889 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
|
890 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
|
891
|
|
|
892 #define FROB_FORCE_CHARSET(charset_num) \
|
|
|
893 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
|
894
|
|
|
895 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
|
896 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
|
897 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
|
898 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
|
899
|
|
|
900 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
|
901 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
|
902
|
|
|
903 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
|
904 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
|
905 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
|
906 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
|
907 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
|
908 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
|
909 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
|
910
|
|
|
911 else if (EQ (key, Qinput_charset_conversion))
|
|
|
912 {
|
|
|
913 codesys->iso2022.input_conv =
|
|
|
914 Dynarr_new (charset_conversion_spec);
|
|
|
915 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
|
916 value);
|
|
|
917 }
|
|
|
918 else if (EQ (key, Qoutput_charset_conversion))
|
|
|
919 {
|
|
|
920 codesys->iso2022.output_conv =
|
|
|
921 Dynarr_new (charset_conversion_spec);
|
|
|
922 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
|
923 value);
|
|
|
924 }
|
|
|
925 else
|
|
|
926 signal_simple_error ("Unrecognized property", key);
|
|
|
927 }
|
|
|
928 else if (EQ (type, Qccl))
|
|
|
929 {
|
|
|
930 if (EQ (key, Qdecode))
|
|
|
931 {
|
|
|
932 CHECK_VECTOR (value);
|
|
|
933 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
|
934 }
|
|
|
935 else if (EQ (key, Qencode))
|
|
|
936 {
|
|
|
937 CHECK_VECTOR (value);
|
|
|
938 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
|
939 }
|
|
|
940 else
|
|
|
941 signal_simple_error ("Unrecognized property", key);
|
|
|
942 }
|
|
|
943 #endif /* MULE */
|
|
|
944 else
|
|
|
945 signal_simple_error ("Unrecognized property", key);
|
|
|
946 }
|
|
|
947
|
|
|
948 if (need_to_setup_eol_systems)
|
|
|
949 setup_eol_coding_systems (codesys);
|
|
|
950
|
|
|
951 {
|
|
|
952 Lisp_Object codesys_obj;
|
|
|
953 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
380
|
954 Fputhash (name, codesys_obj, Vcoding_system_hash_table);
|
|
259
|
955 return codesys_obj;
|
|
|
956 }
|
|
|
957 }
|
|
|
958
|
|
|
959 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
960 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
961 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
962 be created.
|
|
|
963 */
|
|
|
964 (old_coding_system, new_name))
|
|
|
965 {
|
|
|
966 Lisp_Object new_coding_system;
|
|
|
967 old_coding_system = Fget_coding_system (old_coding_system);
|
|
|
968 new_coding_system = Ffind_coding_system (new_name);
|
|
|
969 if (NILP (new_coding_system))
|
|
|
970 {
|
|
|
971 XSETCODING_SYSTEM (new_coding_system,
|
|
|
972 allocate_coding_system
|
|
|
973 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
|
974 new_name));
|
|
380
|
975 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
|
259
|
976 }
|
|
|
977
|
|
|
978 {
|
|
396
|
979 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
980 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
259
|
981 memcpy (((char *) to ) + sizeof (to->header),
|
|
|
982 ((char *) from) + sizeof (from->header),
|
|
|
983 sizeof (*from) - sizeof (from->header));
|
|
|
984 to->name = new_name;
|
|
|
985 }
|
|
|
986 return new_coding_system;
|
|
|
987 }
|
|
|
988
|
|
412
|
989 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
|
990 Define symbol ALIAS as an alias for coding system CODING-SYSTEM.
|
|
398
|
991 */
|
|
412
|
992 (alias, coding_system))
|
|
398
|
993 {
|
|
|
994 CHECK_SYMBOL (alias);
|
|
412
|
995 if (!NILP (Ffind_coding_system (alias)))
|
|
|
996 signal_simple_error ("Symbol already names a coding system", alias);
|
|
|
997 coding_system = Fget_coding_system (coding_system);
|
|
|
998 Fputhash (alias, coding_system, Vcoding_system_hash_table);
|
|
|
999
|
|
|
1000 /* Set up aliases for subsidiaries. */
|
|
|
1001 if (XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
398
|
1002 {
|
|
412
|
1003 Lisp_Object str;
|
|
|
1004 XSETSTRING (str, symbol_name (XSYMBOL (alias)));
|
|
|
1005 #define FROB(type, name) \
|
|
|
1006 do { \
|
|
|
1007 Lisp_Object subsidiary = XCODING_SYSTEM_EOL_##type (coding_system); \
|
|
|
1008 if (!NILP (subsidiary)) \
|
|
|
1009 Fdefine_coding_system_alias \
|
|
|
1010 (Fintern (concat2 (str, build_string (name)), Qnil), subsidiary); \
|
|
|
1011 } while (0)
|
|
|
1012 FROB (LF, "-unix");
|
|
|
1013 FROB (CRLF, "-dos");
|
|
|
1014 FROB (CR, "-mac");
|
|
|
1015 #undef FROB
|
|
398
|
1016 }
|
|
412
|
1017 /* FSF return value is a vector of [ALIAS-unix ALIAS-doc ALIAS-mac],
|
|
398
|
1018 but it doesn't look intentional, so I'd rather return something
|
|
|
1019 meaningful or nothing at all. */
|
|
|
1020 return Qnil;
|
|
|
1021 }
|
|
|
1022
|
|
|
1023 static Lisp_Object
|
|
412
|
1024 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
|
259
|
1025 {
|
|
396
|
1026 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
259
|
1027 Lisp_Object new_coding_system;
|
|
|
1028
|
|
|
1029 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
1030 return coding_system;
|
|
|
1031
|
|
|
1032 switch (type)
|
|
|
1033 {
|
|
|
1034 case EOL_AUTODETECT: return coding_system;
|
|
|
1035 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
1036 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
1037 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
|
1038 default: abort ();
|
|
|
1039 }
|
|
|
1040
|
|
|
1041 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
1042 }
|
|
|
1043
|
|
|
1044 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
1045 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
|
1046 */
|
|
|
1047 (coding_system, eol_type))
|
|
|
1048 {
|
|
|
1049 coding_system = Fget_coding_system (coding_system);
|
|
|
1050
|
|
|
1051 return subsidiary_coding_system (coding_system,
|
|
|
1052 symbol_to_eol_type (eol_type));
|
|
|
1053 }
|
|
|
1054
|
|
|
1055
|
|
|
1056 /************************************************************************/
|
|
|
1057 /* Coding system accessors */
|
|
|
1058 /************************************************************************/
|
|
|
1059
|
|
|
1060 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
|
1061 Return the doc string for CODING-SYSTEM.
|
|
|
1062 */
|
|
|
1063 (coding_system))
|
|
|
1064 {
|
|
|
1065 coding_system = Fget_coding_system (coding_system);
|
|
|
1066 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
1070 Return the type of CODING-SYSTEM.
|
|
|
1071 */
|
|
|
1072 (coding_system))
|
|
|
1073 {
|
|
|
1074 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
|
1075 {
|
|
380
|
1076 default: abort ();
|
|
259
|
1077 case CODESYS_AUTODETECT: return Qundecided;
|
|
|
1078 #ifdef MULE
|
|
|
1079 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
|
1080 case CODESYS_ISO2022: return Qiso2022;
|
|
|
1081 case CODESYS_BIG5: return Qbig5;
|
|
396
|
1082 case CODESYS_UCS4: return Qucs4;
|
|
|
1083 case CODESYS_UTF8: return Qutf8;
|
|
259
|
1084 case CODESYS_CCL: return Qccl;
|
|
|
1085 #endif
|
|
|
1086 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
|
1087 #ifdef DEBUG_XEMACS
|
|
|
1088 case CODESYS_INTERNAL: return Qinternal;
|
|
|
1089 #endif
|
|
|
1090 }
|
|
|
1091 }
|
|
|
1092
|
|
|
1093 #ifdef MULE
|
|
|
1094 static
|
|
|
1095 Lisp_Object coding_system_charset (Lisp_Object coding_system, int gnum)
|
|
|
1096 {
|
|
|
1097 Lisp_Object cs
|
|
|
1098 = XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, gnum);
|
|
272
|
1099
|
|
|
1100 return CHARSETP (cs) ? XCHARSET_NAME (cs) : Qnil;
|
|
259
|
1101 }
|
|
|
1102
|
|
|
1103 DEFUN ("coding-system-charset", Fcoding_system_charset, 2, 2, 0, /*
|
|
|
1104 Return initial charset of CODING-SYSTEM designated to GNUM.
|
|
|
1105 GNUM allows 0 .. 3.
|
|
|
1106 */
|
|
|
1107 (coding_system, gnum))
|
|
|
1108 {
|
|
|
1109 coding_system = Fget_coding_system (coding_system);
|
|
|
1110 CHECK_INT (gnum);
|
|
|
1111
|
|
272
|
1112 return coding_system_charset (coding_system, XINT (gnum));
|
|
259
|
1113 }
|
|
272
|
1114 #endif /* MULE */
|
|
259
|
1115
|
|
|
1116 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
1117 Return the PROP property of CODING-SYSTEM.
|
|
|
1118 */
|
|
|
1119 (coding_system, prop))
|
|
|
1120 {
|
|
|
1121 int i, ok = 0;
|
|
|
1122 enum coding_system_type type;
|
|
|
1123
|
|
|
1124 coding_system = Fget_coding_system (coding_system);
|
|
|
1125 CHECK_SYMBOL (prop);
|
|
|
1126 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
|
1127
|
|
|
1128 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
|
1129 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
|
1130 {
|
|
|
1131 ok = 1;
|
|
|
1132 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
|
1133 {
|
|
|
1134 case CODESYS_PROP_ALL_OK:
|
|
|
1135 break;
|
|
|
1136 #ifdef MULE
|
|
|
1137 case CODESYS_PROP_ISO2022:
|
|
|
1138 if (type != CODESYS_ISO2022)
|
|
|
1139 signal_simple_error
|
|
|
1140 ("Property only valid in ISO2022 coding systems",
|
|
|
1141 prop);
|
|
|
1142 break;
|
|
|
1143
|
|
|
1144 case CODESYS_PROP_CCL:
|
|
|
1145 if (type != CODESYS_CCL)
|
|
|
1146 signal_simple_error
|
|
|
1147 ("Property only valid in CCL coding systems",
|
|
|
1148 prop);
|
|
|
1149 break;
|
|
|
1150 #endif /* MULE */
|
|
|
1151 default:
|
|
|
1152 abort ();
|
|
|
1153 }
|
|
|
1154 }
|
|
|
1155
|
|
|
1156 if (!ok)
|
|
|
1157 signal_simple_error ("Unrecognized property", prop);
|
|
|
1158
|
|
|
1159 if (EQ (prop, Qname))
|
|
|
1160 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1161 else if (EQ (prop, Qtype))
|
|
|
1162 return Fcoding_system_type (coding_system);
|
|
|
1163 else if (EQ (prop, Qdoc_string))
|
|
|
1164 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1165 else if (EQ (prop, Qmnemonic))
|
|
|
1166 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
|
1167 else if (EQ (prop, Qeol_type))
|
|
|
1168 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
|
1169 else if (EQ (prop, Qeol_lf))
|
|
|
1170 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1171 else if (EQ (prop, Qeol_crlf))
|
|
|
1172 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1173 else if (EQ (prop, Qeol_cr))
|
|
|
1174 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1175 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1176 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1177 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1178 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
|
1179 #ifdef MULE
|
|
|
1180 else if (type == CODESYS_ISO2022)
|
|
|
1181 {
|
|
|
1182 if (EQ (prop, Qcharset_g0))
|
|
|
1183 return coding_system_charset (coding_system, 0);
|
|
|
1184 else if (EQ (prop, Qcharset_g1))
|
|
|
1185 return coding_system_charset (coding_system, 1);
|
|
|
1186 else if (EQ (prop, Qcharset_g2))
|
|
|
1187 return coding_system_charset (coding_system, 2);
|
|
|
1188 else if (EQ (prop, Qcharset_g3))
|
|
|
1189 return coding_system_charset (coding_system, 3);
|
|
|
1190
|
|
|
1191 #define FORCE_CHARSET(charset_num) \
|
|
|
1192 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
|
1193 (coding_system, charset_num) ? Qt : Qnil)
|
|
|
1194
|
|
|
1195 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
|
1196 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
|
1197 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
|
1198 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
|
1199
|
|
|
1200 #define LISP_BOOLEAN(prop) \
|
|
|
1201 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
|
1202
|
|
|
1203 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
|
1204 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
|
1205 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
|
1206 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
|
1207 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
|
1208 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
|
1209 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
|
1210
|
|
|
1211 else if (EQ (prop, Qinput_charset_conversion))
|
|
|
1212 return
|
|
|
1213 unparse_charset_conversion_specs
|
|
|
1214 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
|
1215 else if (EQ (prop, Qoutput_charset_conversion))
|
|
|
1216 return
|
|
|
1217 unparse_charset_conversion_specs
|
|
|
1218 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
|
1219 else
|
|
|
1220 abort ();
|
|
|
1221 }
|
|
|
1222 else if (type == CODESYS_CCL)
|
|
|
1223 {
|
|
|
1224 if (EQ (prop, Qdecode))
|
|
|
1225 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
|
1226 else if (EQ (prop, Qencode))
|
|
|
1227 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
|
1228 else
|
|
|
1229 abort ();
|
|
|
1230 }
|
|
|
1231 #endif /* MULE */
|
|
|
1232 else
|
|
|
1233 abort ();
|
|
|
1234
|
|
|
1235 return Qnil; /* not reached */
|
|
|
1236 }
|
|
|
1237
|
|
|
1238
|
|
|
1239 /************************************************************************/
|
|
|
1240 /* Coding category functions */
|
|
|
1241 /************************************************************************/
|
|
|
1242
|
|
|
1243 static int
|
|
|
1244 decode_coding_category (Lisp_Object symbol)
|
|
|
1245 {
|
|
|
1246 int i;
|
|
|
1247
|
|
|
1248 CHECK_SYMBOL (symbol);
|
|
|
1249 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1250 if (EQ (coding_category_symbol[i], symbol))
|
|
|
1251 return i;
|
|
|
1252
|
|
|
1253 signal_simple_error ("Unrecognized coding category", symbol);
|
|
|
1254 return 0; /* not reached */
|
|
|
1255 }
|
|
|
1256
|
|
|
1257 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
1258 Return a list of all recognized coding categories.
|
|
|
1259 */
|
|
|
1260 ())
|
|
|
1261 {
|
|
|
1262 int i;
|
|
|
1263 Lisp_Object list = Qnil;
|
|
|
1264
|
|
|
1265 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1266 list = Fcons (coding_category_symbol[i], list);
|
|
|
1267 return list;
|
|
|
1268 }
|
|
|
1269
|
|
|
1270 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
1271 Change the priority order of the coding categories.
|
|
|
1272 LIST should be list of coding categories, in descending order of
|
|
|
1273 priority. Unspecified coding categories will be lower in priority
|
|
|
1274 than all specified ones, in the same relative order they were in
|
|
|
1275 previously.
|
|
|
1276 */
|
|
|
1277 (list))
|
|
|
1278 {
|
|
|
1279 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
|
1280 int i, j;
|
|
|
1281 Lisp_Object rest;
|
|
|
1282
|
|
|
1283 /* First generate a list that maps coding categories to priorities. */
|
|
|
1284
|
|
|
1285 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1286 category_to_priority[i] = -1;
|
|
|
1287
|
|
|
1288 /* Highest priority comes from the specified list. */
|
|
|
1289 i = 0;
|
|
|
1290 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
1291 {
|
|
|
1292 int cat = decode_coding_category (XCAR (rest));
|
|
|
1293
|
|
|
1294 if (category_to_priority[cat] >= 0)
|
|
|
1295 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
|
1296 category_to_priority[cat] = i++;
|
|
|
1297 }
|
|
|
1298
|
|
|
1299 /* Now go through the existing categories by priority to retrieve
|
|
|
1300 the categories not yet specified and preserve their priority
|
|
|
1301 order. */
|
|
|
1302 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
|
1303 {
|
|
412
|
1304 int cat = coding_category_by_priority[j];
|
|
259
|
1305 if (category_to_priority[cat] < 0)
|
|
|
1306 category_to_priority[cat] = i++;
|
|
|
1307 }
|
|
|
1308
|
|
|
1309 /* Now we need to construct the inverse of the mapping we just
|
|
|
1310 constructed. */
|
|
|
1311
|
|
|
1312 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
412
|
1313 coding_category_by_priority[category_to_priority[i]] = i;
|
|
259
|
1314
|
|
|
1315 /* Phew! That was confusing. */
|
|
|
1316 return Qnil;
|
|
|
1317 }
|
|
|
1318
|
|
|
1319 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
1320 Return a list of coding categories in descending order of priority.
|
|
|
1321 */
|
|
|
1322 ())
|
|
|
1323 {
|
|
|
1324 int i;
|
|
|
1325 Lisp_Object list = Qnil;
|
|
|
1326
|
|
|
1327 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
412
|
1328 list = Fcons (coding_category_symbol[coding_category_by_priority[i]],
|
|
259
|
1329 list);
|
|
|
1330 return list;
|
|
|
1331 }
|
|
|
1332
|
|
|
1333 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
1334 Change the coding system associated with a coding category.
|
|
|
1335 */
|
|
|
1336 (coding_category, coding_system))
|
|
|
1337 {
|
|
|
1338 int cat = decode_coding_category (coding_category);
|
|
|
1339
|
|
|
1340 coding_system = Fget_coding_system (coding_system);
|
|
412
|
1341 coding_category_system[cat] = coding_system;
|
|
259
|
1342 return Qnil;
|
|
|
1343 }
|
|
|
1344
|
|
|
1345 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
1346 Return the coding system associated with a coding category.
|
|
|
1347 */
|
|
|
1348 (coding_category))
|
|
|
1349 {
|
|
|
1350 int cat = decode_coding_category (coding_category);
|
|
412
|
1351 Lisp_Object sys = coding_category_system[cat];
|
|
259
|
1352
|
|
|
1353 if (!NILP (sys))
|
|
|
1354 return XCODING_SYSTEM_NAME (sys);
|
|
|
1355 return Qnil;
|
|
|
1356 }
|
|
|
1357
|
|
|
1358
|
|
|
1359 /************************************************************************/
|
|
|
1360 /* Detecting the encoding of data */
|
|
|
1361 /************************************************************************/
|
|
|
1362
|
|
|
1363 struct detection_state
|
|
|
1364 {
|
|
412
|
1365 enum eol_type eol_type;
|
|
259
|
1366 int seen_non_ascii;
|
|
|
1367 int mask;
|
|
|
1368 #ifdef MULE
|
|
|
1369 struct
|
|
|
1370 {
|
|
|
1371 int mask;
|
|
|
1372 int in_second_byte;
|
|
|
1373 }
|
|
|
1374 big5;
|
|
|
1375
|
|
|
1376 struct
|
|
|
1377 {
|
|
|
1378 int mask;
|
|
|
1379 int in_second_byte;
|
|
|
1380 }
|
|
|
1381 shift_jis;
|
|
|
1382
|
|
|
1383 struct
|
|
|
1384 {
|
|
|
1385 int mask;
|
|
396
|
1386 int in_byte;
|
|
|
1387 }
|
|
|
1388 ucs4;
|
|
|
1389
|
|
|
1390 struct
|
|
|
1391 {
|
|
|
1392 int mask;
|
|
|
1393 int in_byte;
|
|
|
1394 }
|
|
|
1395 utf8;
|
|
|
1396
|
|
|
1397 struct
|
|
|
1398 {
|
|
|
1399 int mask;
|
|
259
|
1400 int initted;
|
|
|
1401 struct iso2022_decoder iso;
|
|
|
1402 unsigned int flags;
|
|
|
1403 int high_byte_count;
|
|
|
1404 unsigned int saw_single_shift:1;
|
|
|
1405 }
|
|
|
1406 iso2022;
|
|
|
1407 #endif
|
|
|
1408 struct
|
|
|
1409 {
|
|
|
1410 int seen_anything;
|
|
|
1411 int just_saw_cr;
|
|
|
1412 }
|
|
|
1413 eol;
|
|
|
1414 };
|
|
|
1415
|
|
|
1416 static int
|
|
|
1417 acceptable_control_char_p (int c)
|
|
|
1418 {
|
|
|
1419 switch (c)
|
|
|
1420 {
|
|
|
1421 /* Allow and ignore control characters that you might
|
|
|
1422 reasonably see in a text file */
|
|
|
1423 case '\r':
|
|
|
1424 case '\n':
|
|
|
1425 case '\t':
|
|
|
1426 case 7: /* bell */
|
|
|
1427 case 8: /* backspace */
|
|
|
1428 case 11: /* vertical tab */
|
|
|
1429 case 12: /* form feed */
|
|
|
1430 case 26: /* MS-DOS C-z junk */
|
|
|
1431 case 31: /* '^_' -- for info */
|
|
|
1432 return 1;
|
|
|
1433 default:
|
|
|
1434 return 0;
|
|
|
1435 }
|
|
|
1436 }
|
|
|
1437
|
|
|
1438 static int
|
|
|
1439 mask_has_at_most_one_bit_p (int mask)
|
|
|
1440 {
|
|
|
1441 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
|
1442 technical interviews */
|
|
|
1443 return (mask & (mask - 1)) == 0;
|
|
|
1444 }
|
|
|
1445
|
|
412
|
1446 static enum eol_type
|
|
|
1447 detect_eol_type (struct detection_state *st, CONST unsigned char *src,
|
|
259
|
1448 unsigned int n)
|
|
|
1449 {
|
|
|
1450 int c;
|
|
|
1451
|
|
|
1452 while (n--)
|
|
|
1453 {
|
|
|
1454 c = *src++;
|
|
412
|
1455 if (c == '\r')
|
|
259
|
1456 st->eol.just_saw_cr = 1;
|
|
|
1457 else
|
|
412
|
1458 {
|
|
|
1459 if (c == '\n')
|
|
|
1460 {
|
|
|
1461 if (st->eol.just_saw_cr)
|
|
|
1462 return EOL_CRLF;
|
|
|
1463 else if (st->eol.seen_anything)
|
|
|
1464 return EOL_LF;
|
|
|
1465 }
|
|
|
1466 else if (st->eol.just_saw_cr)
|
|
|
1467 return EOL_CR;
|
|
|
1468 st->eol.just_saw_cr = 0;
|
|
|
1469 }
|
|
259
|
1470 st->eol.seen_anything = 1;
|
|
|
1471 }
|
|
|
1472
|
|
|
1473 return EOL_AUTODETECT;
|
|
|
1474 }
|
|
|
1475
|
|
|
1476 /* Attempt to determine the encoding and EOL type of the given text.
|
|
|
1477 Before calling this function for the first type, you must initialize
|
|
|
1478 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
|
1479
|
|
|
1480 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
|
1481 not yet known.
|
|
|
1482
|
|
|
1483 st->mask holds the determined coding category mask, or ~0 if only
|
|
|
1484 ASCII has been seen so far.
|
|
|
1485
|
|
|
1486 Returns:
|
|
|
1487
|
|
|
1488 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
|
1489 is present in st->mask
|
|
|
1490 1 == definitive answers are here for both st->eol_type and st->mask
|
|
|
1491 */
|
|
|
1492
|
|
|
1493 static int
|
|
412
|
1494 detect_coding_type (struct detection_state *st, CONST unsigned char *src,
|
|
259
|
1495 unsigned int n, int just_do_eol)
|
|
|
1496 {
|
|
|
1497 int c;
|
|
|
1498
|
|
|
1499 if (st->eol_type == EOL_AUTODETECT)
|
|
|
1500 st->eol_type = detect_eol_type (st, src, n);
|
|
|
1501
|
|
|
1502 if (just_do_eol)
|
|
|
1503 return st->eol_type != EOL_AUTODETECT;
|
|
|
1504
|
|
|
1505 if (!st->seen_non_ascii)
|
|
|
1506 {
|
|
|
1507 for (; n; n--, src++)
|
|
|
1508 {
|
|
|
1509 c = *src;
|
|
|
1510 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
1511 {
|
|
|
1512 st->seen_non_ascii = 1;
|
|
|
1513 #ifdef MULE
|
|
|
1514 st->shift_jis.mask = ~0;
|
|
|
1515 st->big5.mask = ~0;
|
|
396
|
1516 st->ucs4.mask = ~0;
|
|
|
1517 st->utf8.mask = ~0;
|
|
259
|
1518 st->iso2022.mask = ~0;
|
|
|
1519 #endif
|
|
|
1520 break;
|
|
|
1521 }
|
|
|
1522 }
|
|
|
1523 }
|
|
|
1524
|
|
|
1525 if (!n)
|
|
|
1526 return 0;
|
|
|
1527 #ifdef MULE
|
|
|
1528 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
|
1529 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
|
1530 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
|
1531 st->shift_jis.mask = detect_coding_sjis (st, src, n);
|
|
|
1532 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
|
1533 st->big5.mask = detect_coding_big5 (st, src, n);
|
|
396
|
1534 if (!mask_has_at_most_one_bit_p (st->utf8.mask))
|
|
|
1535 st->utf8.mask = detect_coding_utf8 (st, src, n);
|
|
|
1536 if (!mask_has_at_most_one_bit_p (st->ucs4.mask))
|
|
|
1537 st->ucs4.mask = detect_coding_ucs4 (st, src, n);
|
|
|
1538
|
|
|
1539 st->mask
|
|
|
1540 = st->iso2022.mask | st->shift_jis.mask | st->big5.mask
|
|
|
1541 | st->utf8.mask | st->ucs4.mask;
|
|
259
|
1542 #endif
|
|
|
1543 {
|
|
|
1544 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
|
1545 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
|
1546 return retval && st->eol_type != EOL_AUTODETECT;
|
|
|
1547 }
|
|
|
1548 }
|
|
|
1549
|
|
|
1550 static Lisp_Object
|
|
|
1551 coding_system_from_mask (int mask)
|
|
|
1552 {
|
|
|
1553 if (mask == ~0)
|
|
|
1554 {
|
|
|
1555 /* If the file was entirely or basically ASCII, use the
|
|
|
1556 default value of `buffer-file-coding-system'. */
|
|
|
1557 Lisp_Object retval =
|
|
|
1558 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
|
1559 if (!NILP (retval))
|
|
|
1560 {
|
|
|
1561 retval = Ffind_coding_system (retval);
|
|
|
1562 if (NILP (retval))
|
|
|
1563 {
|
|
|
1564 warn_when_safe
|
|
|
1565 (Qbad_variable, Qwarning,
|
|
|
1566 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
1567 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
|
1568 }
|
|
|
1569 }
|
|
|
1570 if (NILP (retval))
|
|
416
|
1571 retval = Fget_coding_system (Qraw_text);
|
|
259
|
1572 return retval;
|
|
|
1573 }
|
|
|
1574 else
|
|
|
1575 {
|
|
|
1576 int i;
|
|
|
1577 int cat = -1;
|
|
|
1578 #ifdef MULE
|
|
|
1579 mask = postprocess_iso2022_mask (mask);
|
|
|
1580 #endif
|
|
|
1581 /* Look through the coding categories by priority and find
|
|
|
1582 the first one that is allowed. */
|
|
|
1583 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1584 {
|
|
412
|
1585 cat = coding_category_by_priority[i];
|
|
259
|
1586 if ((mask & (1 << cat)) &&
|
|
412
|
1587 !NILP (coding_category_system[cat]))
|
|
259
|
1588 break;
|
|
|
1589 }
|
|
|
1590 if (cat >= 0)
|
|
412
|
1591 return coding_category_system[cat];
|
|
259
|
1592 else
|
|
416
|
1593 return Fget_coding_system (Qraw_text);
|
|
259
|
1594 }
|
|
|
1595 }
|
|
|
1596
|
|
|
1597 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
1598 as specified, do any autodetection that is called for. If the
|
|
412
|
1599 coding system and/or EOL type are not autodetect, they will be left
|
|
259
|
1600 alone; but this function will never return an autodetect coding system
|
|
|
1601 or EOL type.
|
|
|
1602
|
|
|
1603 This function does not automatically fetch subsidiary coding systems;
|
|
|
1604 that should be unnecessary with the explicit eol-type argument. */
|
|
|
1605
|
|
|
1606 void
|
|
|
1607 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
|
412
|
1608 enum eol_type *eol_type_in_out)
|
|
259
|
1609 {
|
|
|
1610 struct detection_state decst;
|
|
|
1611
|
|
|
1612 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1613 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
|
1614
|
|
272
|
1615 xzero (decst);
|
|
259
|
1616 decst.eol_type = *eol_type_in_out;
|
|
|
1617 decst.mask = ~0;
|
|
|
1618
|
|
|
1619 /* If autodetection is called for, do it now. */
|
|
412
|
1620 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT ||
|
|
|
1621 *eol_type_in_out == EOL_AUTODETECT)
|
|
259
|
1622 {
|
|
412
|
1623
|
|
|
1624 while (1)
|
|
|
1625 {
|
|
|
1626 unsigned char random_buffer[4096];
|
|
|
1627 int nread;
|
|
|
1628
|
|
|
1629 nread = Lstream_read (stream, random_buffer, sizeof (random_buffer));
|
|
|
1630 if (!nread)
|
|
259
|
1631 break;
|
|
412
|
1632 if (detect_coding_type (&decst, random_buffer, nread,
|
|
|
1633 XCODING_SYSTEM_TYPE (*codesys_in_out) !=
|
|
|
1634 CODESYS_AUTODETECT))
|
|
|
1635 break;
|
|
|
1636 }
|
|
259
|
1637
|
|
|
1638 *eol_type_in_out = decst.eol_type;
|
|
|
1639 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
|
412
|
1640 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
259
|
1641 }
|
|
|
1642
|
|
|
1643 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
|
1644 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1645 *eol_type_in_out = EOL_LF;
|
|
|
1646
|
|
|
1647 Lstream_rewind (stream);
|
|
|
1648 }
|
|
|
1649
|
|
|
1650 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
1651 Detect coding system of the text in the region between START and END.
|
|
|
1652 Returned a list of possible coding systems ordered by priority.
|
|
|
1653 If only ASCII characters are found, it returns 'undecided or one of
|
|
|
1654 its subsidiary coding systems according to a detected end-of-line
|
|
|
1655 type. Optional arg BUFFER defaults to the current buffer.
|
|
|
1656 */
|
|
|
1657 (start, end, buffer))
|
|
|
1658 {
|
|
|
1659 Lisp_Object val = Qnil;
|
|
|
1660 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1661 Bufpos b, e;
|
|
|
1662 Lisp_Object instream, lb_instream;
|
|
|
1663 Lstream *istr, *lb_istr;
|
|
|
1664 struct detection_state decst;
|
|
|
1665 struct gcpro gcpro1, gcpro2;
|
|
|
1666
|
|
|
1667 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
1668 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1669 lb_istr = XLSTREAM (lb_instream);
|
|
|
1670 instream = make_encoding_input_stream (lb_istr, Fget_coding_system (Qbinary));
|
|
|
1671 istr = XLSTREAM (instream);
|
|
|
1672 GCPRO2 (instream, lb_instream);
|
|
272
|
1673 xzero (decst);
|
|
259
|
1674 decst.eol_type = EOL_AUTODETECT;
|
|
|
1675 decst.mask = ~0;
|
|
|
1676 while (1)
|
|
|
1677 {
|
|
|
1678 unsigned char random_buffer[4096];
|
|
412
|
1679 int nread = Lstream_read (istr, random_buffer, sizeof (random_buffer));
|
|
259
|
1680
|
|
|
1681 if (!nread)
|
|
|
1682 break;
|
|
|
1683 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
|
1684 break;
|
|
|
1685 }
|
|
|
1686
|
|
|
1687 if (decst.mask == ~0)
|
|
|
1688 val = subsidiary_coding_system (Fget_coding_system (Qundecided),
|
|
|
1689 decst.eol_type);
|
|
|
1690 else
|
|
|
1691 {
|
|
|
1692 int i;
|
|
|
1693
|
|
|
1694 val = Qnil;
|
|
|
1695 #ifdef MULE
|
|
|
1696 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
|
1697 #endif
|
|
|
1698 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1699 {
|
|
412
|
1700 int sys = coding_category_by_priority[i];
|
|
259
|
1701 if (decst.mask & (1 << sys))
|
|
|
1702 {
|
|
412
|
1703 Lisp_Object codesys = coding_category_system[sys];
|
|
259
|
1704 if (!NILP (codesys))
|
|
|
1705 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
|
1706 val = Fcons (codesys, val);
|
|
|
1707 }
|
|
|
1708 }
|
|
|
1709 }
|
|
|
1710 Lstream_close (istr);
|
|
|
1711 UNGCPRO;
|
|
|
1712 Lstream_delete (istr);
|
|
|
1713 Lstream_delete (lb_istr);
|
|
|
1714 return val;
|
|
|
1715 }
|
|
|
1716
|
|
|
1717
|
|
|
1718 /************************************************************************/
|
|
|
1719 /* Converting to internal Mule format ("decoding") */
|
|
|
1720 /************************************************************************/
|
|
|
1721
|
|
|
1722 /* A decoding stream is a stream used for decoding text (i.e.
|
|
|
1723 converting from some external format to internal format).
|
|
|
1724 The decoding-stream object keeps track of the actual coding
|
|
|
1725 stream, the stream that is at the other end, and data that
|
|
|
1726 needs to be persistent across the lifetime of the stream. */
|
|
|
1727
|
|
|
1728 /* Handle the EOL stuff related to just-read-in character C.
|
|
|
1729 EOL_TYPE is the EOL type of the coding stream.
|
|
|
1730 FLAGS is the current value of FLAGS in the coding stream, and may
|
|
|
1731 be modified by this macro. (The macro only looks at the
|
|
|
1732 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
|
|
|
1733 bytes are to be written. You need to also define a local goto
|
|
|
1734 label "label_continue_loop" that is at the end of the main
|
|
|
1735 character-reading loop.
|
|
|
1736
|
|
|
1737 If C is a CR character, then this macro handles it entirely and
|
|
|
1738 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
|
1739 anything to DST, and continues normally. You should continue
|
|
|
1740 processing C normally after this macro. */
|
|
|
1741
|
|
|
1742 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
|
|
|
1743 do { \
|
|
|
1744 if (c == '\r') \
|
|
|
1745 { \
|
|
|
1746 if (eol_type == EOL_CR) \
|
|
|
1747 Dynarr_add (dst, '\n'); \
|
|
|
1748 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
|
1749 Dynarr_add (dst, c); \
|
|
|
1750 else \
|
|
|
1751 flags |= CODING_STATE_CR; \
|
|
|
1752 goto label_continue_loop; \
|
|
|
1753 } \
|
|
|
1754 else if (flags & CODING_STATE_CR) \
|
|
|
1755 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
|
|
|
1756 if (c != '\n') \
|
|
|
1757 Dynarr_add (dst, '\r'); \
|
|
|
1758 flags &= ~CODING_STATE_CR; \
|
|
|
1759 } \
|
|
|
1760 } while (0)
|
|
|
1761
|
|
|
1762 /* C should be a binary character in the range 0 - 255; convert
|
|
|
1763 to internal format and add to Dynarr DST. */
|
|
|
1764
|
|
|
1765 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
|
1766 do { \
|
|
|
1767 if (BYTE_ASCII_P (c)) \
|
|
|
1768 Dynarr_add (dst, c); \
|
|
|
1769 else if (BYTE_C1_P (c)) \
|
|
|
1770 { \
|
|
|
1771 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
|
1772 Dynarr_add (dst, c + 0x20); \
|
|
|
1773 } \
|
|
|
1774 else \
|
|
|
1775 { \
|
|
|
1776 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
|
|
|
1777 Dynarr_add (dst, c); \
|
|
|
1778 } \
|
|
|
1779 } while (0)
|
|
|
1780
|
|
|
1781 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
|
1782 do { \
|
|
|
1783 if (ch) \
|
|
|
1784 { \
|
|
|
1785 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
|
1786 ch = 0; \
|
|
|
1787 } \
|
|
|
1788 } while (0)
|
|
|
1789
|
|
|
1790 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
|
|
|
1791 do { \
|
|
398
|
1792 if (flags & CODING_STATE_END) \
|
|
|
1793 { \
|
|
|
1794 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
|
1795 if (flags & CODING_STATE_CR) \
|
|
|
1796 Dynarr_add (dst, '\r'); \
|
|
|
1797 } \
|
|
259
|
1798 } while (0)
|
|
|
1799
|
|
|
1800 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
|
1801
|
|
|
1802 struct decoding_stream
|
|
|
1803 {
|
|
|
1804 /* Coding system that governs the conversion. */
|
|
396
|
1805 Lisp_Coding_System *codesys;
|
|
259
|
1806
|
|
|
1807 /* Stream that we read the encoded data from or
|
|
|
1808 write the decoded data to. */
|
|
|
1809 Lstream *other_end;
|
|
|
1810
|
|
|
1811 /* If we are reading, then we can return only a fixed amount of
|
|
|
1812 data, so if the conversion resulted in too much data, we store it
|
|
|
1813 here for retrieval the next time around. */
|
|
|
1814 unsigned_char_dynarr *runoff;
|
|
|
1815
|
|
|
1816 /* FLAGS holds flags indicating the current state of the decoding.
|
|
|
1817 Some of these flags are dependent on the coding system. */
|
|
|
1818 unsigned int flags;
|
|
|
1819
|
|
|
1820 /* CH holds a partially built-up character. Since we only deal
|
|
|
1821 with one- and two-byte characters at the moment, we only use
|
|
|
1822 this to store the first byte of a two-byte character. */
|
|
|
1823 unsigned int ch;
|
|
|
1824
|
|
|
1825 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
|
1826 currently applies. We need to keep this separate from the
|
|
|
1827 EOL type stored in CODESYS because the latter might indicate
|
|
|
1828 automatic EOL-type detection while the former will always
|
|
|
1829 indicate a particular EOL type. */
|
|
412
|
1830 enum eol_type eol_type;
|
|
259
|
1831 #ifdef MULE
|
|
|
1832 /* Additional ISO2022 information. We define the structure above
|
|
|
1833 because it's also needed by the detection routines. */
|
|
|
1834 struct iso2022_decoder iso2022;
|
|
|
1835
|
|
|
1836 /* Additional information (the state of the running CCL program)
|
|
|
1837 used by the CCL decoder. */
|
|
|
1838 struct ccl_program ccl;
|
|
|
1839 #endif
|
|
|
1840 struct detection_state decst;
|
|
|
1841 };
|
|
|
1842
|
|
412
|
1843 static int decoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
|
1844 static int decoding_writer (Lstream *stream, CONST unsigned char *data, size_t size);
|
|
259
|
1845 static int decoding_rewinder (Lstream *stream);
|
|
|
1846 static int decoding_seekable_p (Lstream *stream);
|
|
|
1847 static int decoding_flusher (Lstream *stream);
|
|
|
1848 static int decoding_closer (Lstream *stream);
|
|
|
1849
|
|
412
|
1850 static Lisp_Object decoding_marker (Lisp_Object stream,
|
|
|
1851 void (*markobj) (Lisp_Object));
|
|
259
|
1852
|
|
|
1853 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
|
1854 sizeof (struct decoding_stream));
|
|
|
1855
|
|
|
1856 static Lisp_Object
|
|
412
|
1857 decoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
259
|
1858 {
|
|
|
1859 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
1860 Lisp_Object str_obj;
|
|
|
1861
|
|
|
1862 /* We do not need to mark the coding systems or charsets stored
|
|
|
1863 within the stream because they are stored in a global list
|
|
|
1864 and automatically marked. */
|
|
|
1865
|
|
|
1866 XSETLSTREAM (str_obj, str);
|
|
412
|
1867 markobj (str_obj);
|
|
259
|
1868 if (str->imp->marker)
|
|
412
|
1869 return (str->imp->marker) (str_obj, markobj);
|
|
259
|
1870 else
|
|
|
1871 return Qnil;
|
|
|
1872 }
|
|
|
1873
|
|
|
1874 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
|
1875 so we read data from the other end, decode it, and store it into DATA. */
|
|
|
1876
|
|
412
|
1877 static int
|
|
272
|
1878 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
259
|
1879 {
|
|
|
1880 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1881 unsigned char *orig_data = data;
|
|
412
|
1882 int read_size;
|
|
259
|
1883 int error_occurred = 0;
|
|
|
1884
|
|
|
1885 /* We need to interface to mule_decode(), which expects to take some
|
|
|
1886 amount of data and store the result into a Dynarr. We have
|
|
|
1887 mule_decode() store into str->runoff, and take data from there
|
|
|
1888 as necessary. */
|
|
|
1889
|
|
|
1890 /* We loop until we have enough data, reading chunks from the other
|
|
|
1891 end and decoding it. */
|
|
|
1892 while (1)
|
|
|
1893 {
|
|
|
1894 /* Take data from the runoff if we can. Make sure to take at
|
|
|
1895 most SIZE bytes, and delete the data from the runoff. */
|
|
|
1896 if (Dynarr_length (str->runoff) > 0)
|
|
|
1897 {
|
|
272
|
1898 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
|
|
259
|
1899 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
1900 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
1901 data += chunk;
|
|
|
1902 size -= chunk;
|
|
|
1903 }
|
|
|
1904
|
|
|
1905 if (size == 0)
|
|
|
1906 break; /* No more room for data */
|
|
|
1907
|
|
|
1908 if (str->flags & CODING_STATE_END)
|
|
|
1909 /* This means that on the previous iteration, we hit the EOF on
|
|
|
1910 the other end. We loop once more so that mule_decode() can
|
|
|
1911 output any final stuff it may be holding, or any "go back
|
|
|
1912 to a sane state" escape sequences. (This latter makes sense
|
|
|
1913 during encoding.) */
|
|
|
1914 break;
|
|
|
1915
|
|
|
1916 /* Exhausted the runoff, so get some more. DATA has at least
|
|
|
1917 SIZE bytes left of storage in it, so it's OK to read directly
|
|
|
1918 into it. (We'll be overwriting above, after we've decoded it
|
|
|
1919 into the runoff.) */
|
|
|
1920 read_size = Lstream_read (str->other_end, data, size);
|
|
|
1921 if (read_size < 0)
|
|
|
1922 {
|
|
|
1923 error_occurred = 1;
|
|
|
1924 break;
|
|
|
1925 }
|
|
|
1926 if (read_size == 0)
|
|
|
1927 /* There might be some more end data produced in the translation.
|
|
|
1928 See the comment above. */
|
|
|
1929 str->flags |= CODING_STATE_END;
|
|
|
1930 mule_decode (stream, data, str->runoff, read_size);
|
|
|
1931 }
|
|
|
1932
|
|
|
1933 if (data - orig_data == 0)
|
|
|
1934 return error_occurred ? -1 : 0;
|
|
|
1935 else
|
|
|
1936 return data - orig_data;
|
|
|
1937 }
|
|
|
1938
|
|
412
|
1939 static int
|
|
|
1940 decoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
|
259
|
1941 {
|
|
|
1942 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
412
|
1943 int retval;
|
|
259
|
1944
|
|
|
1945 /* Decode all our data into the runoff, and then attempt to write
|
|
|
1946 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
1947 in writing. */
|
|
|
1948 mule_decode (stream, data, str->runoff, size);
|
|
|
1949 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
1950 Dynarr_length (str->runoff));
|
|
|
1951 if (retval > 0)
|
|
|
1952 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
1953 /* Do NOT return retval. The return value indicates how much
|
|
|
1954 of the incoming data was written, not how many bytes were
|
|
|
1955 written. */
|
|
|
1956 return size;
|
|
|
1957 }
|
|
|
1958
|
|
|
1959 static void
|
|
|
1960 reset_decoding_stream (struct decoding_stream *str)
|
|
|
1961 {
|
|
|
1962 #ifdef MULE
|
|
|
1963 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
1964 {
|
|
272
|
1965 Lisp_Object coding_system;
|
|
259
|
1966 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
1967 reset_iso2022 (coding_system, &str->iso2022);
|
|
|
1968 }
|
|
|
1969 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
1970 {
|
|
|
1971 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
|
|
|
1972 }
|
|
272
|
1973 #endif /* MULE */
|
|
259
|
1974 str->flags = str->ch = 0;
|
|
|
1975 }
|
|
|
1976
|
|
|
1977 static int
|
|
|
1978 decoding_rewinder (Lstream *stream)
|
|
|
1979 {
|
|
|
1980 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1981 reset_decoding_stream (str);
|
|
|
1982 Dynarr_reset (str->runoff);
|
|
|
1983 return Lstream_rewind (str->other_end);
|
|
|
1984 }
|
|
|
1985
|
|
|
1986 static int
|
|
|
1987 decoding_seekable_p (Lstream *stream)
|
|
|
1988 {
|
|
|
1989 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1990 return Lstream_seekable_p (str->other_end);
|
|
|
1991 }
|
|
|
1992
|
|
|
1993 static int
|
|
|
1994 decoding_flusher (Lstream *stream)
|
|
|
1995 {
|
|
|
1996 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1997 return Lstream_flush (str->other_end);
|
|
|
1998 }
|
|
|
1999
|
|
|
2000 static int
|
|
|
2001 decoding_closer (Lstream *stream)
|
|
|
2002 {
|
|
|
2003 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2004 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2005 {
|
|
|
2006 str->flags |= CODING_STATE_END;
|
|
|
2007 decoding_writer (stream, 0, 0);
|
|
|
2008 }
|
|
|
2009 Dynarr_free (str->runoff);
|
|
|
2010 #ifdef MULE
|
|
396
|
2011 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
2012 if (str->iso2022.composite_chars)
|
|
|
2013 Dynarr_free (str->iso2022.composite_chars);
|
|
|
2014 #endif
|
|
396
|
2015 #endif
|
|
259
|
2016 return Lstream_close (str->other_end);
|
|
|
2017 }
|
|
|
2018
|
|
|
2019 Lisp_Object
|
|
|
2020 decoding_stream_coding_system (Lstream *stream)
|
|
|
2021 {
|
|
272
|
2022 Lisp_Object coding_system;
|
|
259
|
2023 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2024
|
|
|
2025 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2026 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
|
2027 }
|
|
|
2028
|
|
|
2029 void
|
|
|
2030 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2031 {
|
|
396
|
2032 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
259
|
2033 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2034 str->codesys = cs;
|
|
|
2035 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
2036 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
|
2037 reset_decoding_stream (str);
|
|
|
2038 }
|
|
|
2039
|
|
|
2040 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
|
2041 stream for writing, no automatic code detection will be performed.
|
|
|
2042 The reason for this is that automatic code detection requires a
|
|
|
2043 seekable input. Things will also fail if you open a decoding
|
|
|
2044 stream for reading using a non-fully-specified coding system and
|
|
|
2045 a non-seekable input stream. */
|
|
|
2046
|
|
|
2047 static Lisp_Object
|
|
|
2048 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
412
|
2049 CONST char *mode)
|
|
259
|
2050 {
|
|
|
2051 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
|
2052 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2053 Lisp_Object obj;
|
|
|
2054
|
|
272
|
2055 xzero (*str);
|
|
259
|
2056 str->other_end = stream;
|
|
|
2057 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
|
|
|
2058 str->eol_type = EOL_AUTODETECT;
|
|
|
2059 if (!strcmp (mode, "r")
|
|
|
2060 && Lstream_seekable_p (stream))
|
|
|
2061 /* We can determine the coding system now. */
|
|
|
2062 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
|
2063 set_decoding_stream_coding_system (lstr, codesys);
|
|
|
2064 str->decst.eol_type = str->eol_type;
|
|
|
2065 str->decst.mask = ~0;
|
|
|
2066 XSETLSTREAM (obj, lstr);
|
|
|
2067 return obj;
|
|
|
2068 }
|
|
|
2069
|
|
|
2070 Lisp_Object
|
|
|
2071 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2072 {
|
|
|
2073 return make_decoding_stream_1 (stream, codesys, "r");
|
|
|
2074 }
|
|
|
2075
|
|
|
2076 Lisp_Object
|
|
|
2077 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2078 {
|
|
|
2079 return make_decoding_stream_1 (stream, codesys, "w");
|
|
|
2080 }
|
|
|
2081
|
|
|
2082 /* Note: the decode_coding_* functions all take the same
|
|
|
2083 arguments as mule_decode(), which is to say some SRC data of
|
|
|
2084 size N, which is to be stored into dynamic array DST.
|
|
|
2085 DECODING is the stream within which the decoding is
|
|
|
2086 taking place, but no data is actually read from or
|
|
|
2087 written to that stream; that is handled in decoding_reader()
|
|
|
2088 or decoding_writer(). This allows the same functions to
|
|
|
2089 be used for both reading and writing. */
|
|
|
2090
|
|
|
2091 static void
|
|
412
|
2092 mule_decode (Lstream *decoding, CONST unsigned char *src,
|
|
259
|
2093 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2094 {
|
|
|
2095 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2096
|
|
|
2097 /* If necessary, do encoding-detection now. We do this when
|
|
|
2098 we're a writing stream or a non-seekable reading stream,
|
|
|
2099 meaning that we can't just process the whole input,
|
|
|
2100 rewind, and start over. */
|
|
|
2101
|
|
|
2102 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
|
2103 str->eol_type == EOL_AUTODETECT)
|
|
|
2104 {
|
|
272
|
2105 Lisp_Object codesys;
|
|
259
|
2106
|
|
|
2107 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
|
2108 detect_coding_type (&str->decst, src, n,
|
|
|
2109 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
|
2110 CODESYS_AUTODETECT);
|
|
|
2111 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
|
2112 str->decst.mask != ~0)
|
|
|
2113 /* #### This is cheesy. What we really ought to do is
|
|
|
2114 buffer up a certain amount of data so as to get a
|
|
|
2115 less random result. */
|
|
|
2116 codesys = coding_system_from_mask (str->decst.mask);
|
|
|
2117 str->eol_type = str->decst.eol_type;
|
|
|
2118 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
|
2119 {
|
|
|
2120 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
|
2121 If we erase it, bad things might happen. */
|
|
|
2122 int was_end = str->flags & CODING_STATE_END;
|
|
|
2123 set_decoding_stream_coding_system (decoding, codesys);
|
|
|
2124 if (was_end)
|
|
|
2125 str->flags |= CODING_STATE_END;
|
|
|
2126 }
|
|
|
2127 }
|
|
|
2128
|
|
|
2129 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2130 {
|
|
|
2131 #ifdef DEBUG_XEMACS
|
|
|
2132 case CODESYS_INTERNAL:
|
|
|
2133 Dynarr_add_many (dst, src, n);
|
|
|
2134 break;
|
|
|
2135 #endif
|
|
|
2136 case CODESYS_AUTODETECT:
|
|
|
2137 /* If we got this far and still haven't decided on the coding
|
|
|
2138 system, then do no conversion. */
|
|
|
2139 case CODESYS_NO_CONVERSION:
|
|
|
2140 decode_coding_no_conversion (decoding, src, dst, n);
|
|
|
2141 break;
|
|
|
2142 #ifdef MULE
|
|
|
2143 case CODESYS_SHIFT_JIS:
|
|
|
2144 decode_coding_sjis (decoding, src, dst, n);
|
|
|
2145 break;
|
|
|
2146 case CODESYS_BIG5:
|
|
|
2147 decode_coding_big5 (decoding, src, dst, n);
|
|
|
2148 break;
|
|
396
|
2149 case CODESYS_UCS4:
|
|
|
2150 decode_coding_ucs4 (decoding, src, dst, n);
|
|
|
2151 break;
|
|
|
2152 case CODESYS_UTF8:
|
|
|
2153 decode_coding_utf8 (decoding, src, dst, n);
|
|
|
2154 break;
|
|
259
|
2155 case CODESYS_CCL:
|
|
422
|
2156 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
418
|
2157 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_DECODING);
|
|
259
|
2158 break;
|
|
|
2159 case CODESYS_ISO2022:
|
|
|
2160 decode_coding_iso2022 (decoding, src, dst, n);
|
|
|
2161 break;
|
|
272
|
2162 #endif /* MULE */
|
|
259
|
2163 default:
|
|
|
2164 abort ();
|
|
|
2165 }
|
|
|
2166 }
|
|
|
2167
|
|
|
2168 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
2169 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
2170 This is useful if you've read in encoded text from a file without decoding
|
|
|
2171 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
2172 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
|
2173 Return length of decoded text.
|
|
|
2174 BUFFER defaults to the current buffer if unspecified.
|
|
|
2175 */
|
|
|
2176 (start, end, coding_system, buffer))
|
|
|
2177 {
|
|
|
2178 Bufpos b, e;
|
|
|
2179 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2180 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2181 Lstream *istr, *ostr;
|
|
|
2182 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2183
|
|
|
2184 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2185
|
|
|
2186 barf_if_buffer_read_only (buf, b, e);
|
|
|
2187
|
|
|
2188 coding_system = Fget_coding_system (coding_system);
|
|
|
2189 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2190 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2191 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2192 coding_system);
|
|
|
2193 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2194 Fget_coding_system (Qbinary));
|
|
|
2195 istr = XLSTREAM (instream);
|
|
|
2196 ostr = XLSTREAM (outstream);
|
|
|
2197 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
|
|
|
2198
|
|
|
2199 /* The chain of streams looks like this:
|
|
|
2200
|
|
|
2201 [BUFFER] <----- send through
|
|
|
2202 ------> [ENCODE AS BINARY]
|
|
|
2203 ------> [DECODE AS SPECIFIED]
|
|
|
2204 ------> [BUFFER]
|
|
|
2205 */
|
|
|
2206
|
|
|
2207 while (1)
|
|
|
2208 {
|
|
|
2209 char tempbuf[1024]; /* some random amount */
|
|
|
2210 Bufpos newpos, even_newer_pos;
|
|
|
2211 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
412
|
2212 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
259
|
2213
|
|
|
2214 if (!size_in_bytes)
|
|
|
2215 break;
|
|
|
2216 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2217 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2218 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2219 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2220 even_newer_pos, 0);
|
|
|
2221 }
|
|
|
2222 Lstream_close (istr);
|
|
|
2223 Lstream_close (ostr);
|
|
|
2224 UNGCPRO;
|
|
|
2225 Lstream_delete (istr);
|
|
|
2226 Lstream_delete (ostr);
|
|
|
2227 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2228 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2229 return Qnil;
|
|
|
2230 }
|
|
|
2231
|
|
|
2232
|
|
|
2233 /************************************************************************/
|
|
|
2234 /* Converting to an external encoding ("encoding") */
|
|
|
2235 /************************************************************************/
|
|
|
2236
|
|
|
2237 /* An encoding stream is an output stream. When you create the
|
|
|
2238 stream, you specify the coding system that governs the encoding
|
|
|
2239 and another stream that the resulting encoded data is to be
|
|
|
2240 sent to, and then start sending data to it. */
|
|
|
2241
|
|
|
2242 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
|
2243
|
|
|
2244 struct encoding_stream
|
|
|
2245 {
|
|
|
2246 /* Coding system that governs the conversion. */
|
|
396
|
2247 Lisp_Coding_System *codesys;
|
|
259
|
2248
|
|
|
2249 /* Stream that we read the encoded data from or
|
|
|
2250 write the decoded data to. */
|
|
|
2251 Lstream *other_end;
|
|
|
2252
|
|
|
2253 /* If we are reading, then we can return only a fixed amount of
|
|
|
2254 data, so if the conversion resulted in too much data, we store it
|
|
|
2255 here for retrieval the next time around. */
|
|
|
2256 unsigned_char_dynarr *runoff;
|
|
|
2257
|
|
|
2258 /* FLAGS holds flags indicating the current state of the encoding.
|
|
|
2259 Some of these flags are dependent on the coding system. */
|
|
|
2260 unsigned int flags;
|
|
|
2261
|
|
|
2262 /* CH holds a partially built-up character. Since we only deal
|
|
|
2263 with one- and two-byte characters at the moment, we only use
|
|
|
2264 this to store the first byte of a two-byte character. */
|
|
|
2265 unsigned int ch;
|
|
|
2266 #ifdef MULE
|
|
|
2267 /* Additional information used by the ISO2022 encoder. */
|
|
|
2268 struct
|
|
|
2269 {
|
|
|
2270 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
2271 through G3 registers. It is initialized from the array
|
|
|
2272 INITIAL_CHARSET in CODESYS. */
|
|
|
2273 Lisp_Object charset[4];
|
|
|
2274
|
|
|
2275 /* Which registers are currently invoked into the left (GL) and
|
|
|
2276 right (GR) halves of the 8-bit encoding space? */
|
|
|
2277 int register_left, register_right;
|
|
|
2278
|
|
|
2279 /* Whether we need to explicitly designate the charset in the
|
|
|
2280 G? register before using it. It is initialized from the
|
|
|
2281 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
|
2282 unsigned char force_charset_on_output[4];
|
|
|
2283
|
|
|
2284 /* Other state variables that need to be preserved across
|
|
|
2285 invocations. */
|
|
|
2286 Lisp_Object current_charset;
|
|
|
2287 int current_half;
|
|
|
2288 int current_char_boundary;
|
|
|
2289 } iso2022;
|
|
|
2290
|
|
|
2291 /* Additional information (the state of the running CCL program)
|
|
|
2292 used by the CCL encoder. */
|
|
|
2293 struct ccl_program ccl;
|
|
272
|
2294 #endif /* MULE */
|
|
259
|
2295 };
|
|
|
2296
|
|
412
|
2297 static int encoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
|
2298 static int encoding_writer (Lstream *stream, CONST unsigned char *data,
|
|
|
2299 size_t size);
|
|
259
|
2300 static int encoding_rewinder (Lstream *stream);
|
|
|
2301 static int encoding_seekable_p (Lstream *stream);
|
|
|
2302 static int encoding_flusher (Lstream *stream);
|
|
|
2303 static int encoding_closer (Lstream *stream);
|
|
|
2304
|
|
412
|
2305 static Lisp_Object encoding_marker (Lisp_Object stream,
|
|
|
2306 void (*markobj) (Lisp_Object));
|
|
259
|
2307
|
|
|
2308 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
|
2309 sizeof (struct encoding_stream));
|
|
|
2310
|
|
|
2311 static Lisp_Object
|
|
412
|
2312 encoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
259
|
2313 {
|
|
|
2314 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2315 Lisp_Object str_obj;
|
|
|
2316
|
|
|
2317 /* We do not need to mark the coding systems or charsets stored
|
|
|
2318 within the stream because they are stored in a global list
|
|
|
2319 and automatically marked. */
|
|
|
2320
|
|
|
2321 XSETLSTREAM (str_obj, str);
|
|
412
|
2322 markobj (str_obj);
|
|
259
|
2323 if (str->imp->marker)
|
|
412
|
2324 return (str->imp->marker) (str_obj, markobj);
|
|
259
|
2325 else
|
|
|
2326 return Qnil;
|
|
|
2327 }
|
|
|
2328
|
|
|
2329 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
|
2330 so we read data from the other end, encode it, and store it into DATA. */
|
|
|
2331
|
|
412
|
2332 static int
|
|
272
|
2333 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
259
|
2334 {
|
|
|
2335 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2336 unsigned char *orig_data = data;
|
|
412
|
2337 int read_size;
|
|
259
|
2338 int error_occurred = 0;
|
|
|
2339
|
|
|
2340 /* We need to interface to mule_encode(), which expects to take some
|
|
|
2341 amount of data and store the result into a Dynarr. We have
|
|
|
2342 mule_encode() store into str->runoff, and take data from there
|
|
|
2343 as necessary. */
|
|
|
2344
|
|
|
2345 /* We loop until we have enough data, reading chunks from the other
|
|
|
2346 end and encoding it. */
|
|
|
2347 while (1)
|
|
|
2348 {
|
|
|
2349 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2350 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2351 if (Dynarr_length (str->runoff) > 0)
|
|
|
2352 {
|
|
272
|
2353 int chunk = min ((int) size, Dynarr_length (str->runoff));
|
|
259
|
2354 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2355 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2356 data += chunk;
|
|
|
2357 size -= chunk;
|
|
|
2358 }
|
|
|
2359
|
|
|
2360 if (size == 0)
|
|
|
2361 break; /* No more room for data */
|
|
|
2362
|
|
|
2363 if (str->flags & CODING_STATE_END)
|
|
|
2364 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2365 the other end. We loop once more so that mule_encode() can
|
|
|
2366 output any final stuff it may be holding, or any "go back
|
|
|
2367 to a sane state" escape sequences. (This latter makes sense
|
|
|
2368 during encoding.) */
|
|
|
2369 break;
|
|
|
2370
|
|
|
2371 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
|
2372 left of storage in it, so it's OK to read directly into it.
|
|
|
2373 (We'll be overwriting above, after we've encoded it into the
|
|
|
2374 runoff.) */
|
|
|
2375 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2376 if (read_size < 0)
|
|
|
2377 {
|
|
|
2378 error_occurred = 1;
|
|
|
2379 break;
|
|
|
2380 }
|
|
|
2381 if (read_size == 0)
|
|
|
2382 /* There might be some more end data produced in the translation.
|
|
|
2383 See the comment above. */
|
|
|
2384 str->flags |= CODING_STATE_END;
|
|
|
2385 mule_encode (stream, data, str->runoff, read_size);
|
|
|
2386 }
|
|
|
2387
|
|
|
2388 if (data == orig_data)
|
|
|
2389 return error_occurred ? -1 : 0;
|
|
|
2390 else
|
|
|
2391 return data - orig_data;
|
|
|
2392 }
|
|
|
2393
|
|
412
|
2394 static int
|
|
|
2395 encoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
|
259
|
2396 {
|
|
|
2397 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
412
|
2398 int retval;
|
|
259
|
2399
|
|
|
2400 /* Encode all our data into the runoff, and then attempt to write
|
|
|
2401 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2402 in writing. */
|
|
|
2403 mule_encode (stream, data, str->runoff, size);
|
|
|
2404 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2405 Dynarr_length (str->runoff));
|
|
|
2406 if (retval > 0)
|
|
|
2407 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2408 /* Do NOT return retval. The return value indicates how much
|
|
|
2409 of the incoming data was written, not how many bytes were
|
|
|
2410 written. */
|
|
|
2411 return size;
|
|
|
2412 }
|
|
|
2413
|
|
|
2414 static void
|
|
|
2415 reset_encoding_stream (struct encoding_stream *str)
|
|
|
2416 {
|
|
272
|
2417 #ifdef MULE
|
|
259
|
2418 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2419 {
|
|
|
2420 case CODESYS_ISO2022:
|
|
|
2421 {
|
|
|
2422 int i;
|
|
|
2423
|
|
|
2424 for (i = 0; i < 4; i++)
|
|
|
2425 {
|
|
|
2426 str->iso2022.charset[i] =
|
|
|
2427 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
|
2428 str->iso2022.force_charset_on_output[i] =
|
|
|
2429 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
|
2430 }
|
|
|
2431 str->iso2022.register_left = 0;
|
|
|
2432 str->iso2022.register_right = 1;
|
|
|
2433 str->iso2022.current_charset = Qnil;
|
|
|
2434 str->iso2022.current_half = 0;
|
|
|
2435 str->iso2022.current_char_boundary = 1;
|
|
|
2436 break;
|
|
|
2437 }
|
|
|
2438 case CODESYS_CCL:
|
|
|
2439 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
|
|
|
2440 break;
|
|
|
2441 default:
|
|
|
2442 break;
|
|
|
2443 }
|
|
272
|
2444 #endif /* MULE */
|
|
259
|
2445
|
|
|
2446 str->flags = str->ch = 0;
|
|
|
2447 }
|
|
|
2448
|
|
|
2449 static int
|
|
|
2450 encoding_rewinder (Lstream *stream)
|
|
|
2451 {
|
|
|
2452 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2453 reset_encoding_stream (str);
|
|
|
2454 Dynarr_reset (str->runoff);
|
|
|
2455 return Lstream_rewind (str->other_end);
|
|
|
2456 }
|
|
|
2457
|
|
|
2458 static int
|
|
|
2459 encoding_seekable_p (Lstream *stream)
|
|
|
2460 {
|
|
|
2461 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2462 return Lstream_seekable_p (str->other_end);
|
|
|
2463 }
|
|
|
2464
|
|
|
2465 static int
|
|
|
2466 encoding_flusher (Lstream *stream)
|
|
|
2467 {
|
|
|
2468 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2469 return Lstream_flush (str->other_end);
|
|
|
2470 }
|
|
|
2471
|
|
|
2472 static int
|
|
|
2473 encoding_closer (Lstream *stream)
|
|
|
2474 {
|
|
|
2475 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2476 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2477 {
|
|
|
2478 str->flags |= CODING_STATE_END;
|
|
|
2479 encoding_writer (stream, 0, 0);
|
|
|
2480 }
|
|
|
2481 Dynarr_free (str->runoff);
|
|
|
2482 return Lstream_close (str->other_end);
|
|
|
2483 }
|
|
|
2484
|
|
|
2485 Lisp_Object
|
|
|
2486 encoding_stream_coding_system (Lstream *stream)
|
|
|
2487 {
|
|
272
|
2488 Lisp_Object coding_system;
|
|
259
|
2489 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2490
|
|
|
2491 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2492 return coding_system;
|
|
|
2493 }
|
|
|
2494
|
|
|
2495 void
|
|
|
2496 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2497 {
|
|
396
|
2498 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
259
|
2499 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2500 str->codesys = cs;
|
|
|
2501 reset_encoding_stream (str);
|
|
|
2502 }
|
|
|
2503
|
|
|
2504 static Lisp_Object
|
|
|
2505 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
412
|
2506 CONST char *mode)
|
|
259
|
2507 {
|
|
|
2508 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
|
2509 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2510 Lisp_Object obj;
|
|
|
2511
|
|
272
|
2512 xzero (*str);
|
|
259
|
2513 str->runoff = Dynarr_new (unsigned_char);
|
|
|
2514 str->other_end = stream;
|
|
|
2515 set_encoding_stream_coding_system (lstr, codesys);
|
|
|
2516 XSETLSTREAM (obj, lstr);
|
|
|
2517 return obj;
|
|
|
2518 }
|
|
|
2519
|
|
|
2520 Lisp_Object
|
|
|
2521 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2522 {
|
|
|
2523 return make_encoding_stream_1 (stream, codesys, "r");
|
|
|
2524 }
|
|
|
2525
|
|
|
2526 Lisp_Object
|
|
|
2527 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2528 {
|
|
|
2529 return make_encoding_stream_1 (stream, codesys, "w");
|
|
|
2530 }
|
|
|
2531
|
|
|
2532 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
|
2533 external format, according to the encoding stream ENCODING.
|
|
|
2534 Store the encoded data into DST. */
|
|
|
2535
|
|
|
2536 static void
|
|
412
|
2537 mule_encode (Lstream *encoding, CONST unsigned char *src,
|
|
259
|
2538 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2539 {
|
|
|
2540 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2541
|
|
|
2542 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2543 {
|
|
|
2544 #ifdef DEBUG_XEMACS
|
|
|
2545 case CODESYS_INTERNAL:
|
|
|
2546 Dynarr_add_many (dst, src, n);
|
|
|
2547 break;
|
|
|
2548 #endif
|
|
|
2549 case CODESYS_AUTODETECT:
|
|
|
2550 /* If we got this far and still haven't decided on the coding
|
|
|
2551 system, then do no conversion. */
|
|
|
2552 case CODESYS_NO_CONVERSION:
|
|
|
2553 encode_coding_no_conversion (encoding, src, dst, n);
|
|
|
2554 break;
|
|
|
2555 #ifdef MULE
|
|
|
2556 case CODESYS_SHIFT_JIS:
|
|
|
2557 encode_coding_sjis (encoding, src, dst, n);
|
|
|
2558 break;
|
|
|
2559 case CODESYS_BIG5:
|
|
|
2560 encode_coding_big5 (encoding, src, dst, n);
|
|
|
2561 break;
|
|
396
|
2562 case CODESYS_UCS4:
|
|
|
2563 encode_coding_ucs4 (encoding, src, dst, n);
|
|
|
2564 break;
|
|
|
2565 case CODESYS_UTF8:
|
|
|
2566 encode_coding_utf8 (encoding, src, dst, n);
|
|
|
2567 break;
|
|
259
|
2568 case CODESYS_CCL:
|
|
422
|
2569 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
418
|
2570 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_ENCODING);
|
|
259
|
2571 break;
|
|
|
2572 case CODESYS_ISO2022:
|
|
|
2573 encode_coding_iso2022 (encoding, src, dst, n);
|
|
|
2574 break;
|
|
|
2575 #endif /* MULE */
|
|
|
2576 default:
|
|
|
2577 abort ();
|
|
|
2578 }
|
|
|
2579 }
|
|
|
2580
|
|
|
2581 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2582 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2583 This will, for example, convert Japanese characters into stuff such as
|
|
|
2584 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
|
2585 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2586 */
|
|
|
2587 (start, end, coding_system, buffer))
|
|
|
2588 {
|
|
|
2589 Bufpos b, e;
|
|
|
2590 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2591 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2592 Lstream *istr, *ostr;
|
|
|
2593 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2594
|
|
|
2595 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2596
|
|
|
2597 barf_if_buffer_read_only (buf, b, e);
|
|
|
2598
|
|
|
2599 coding_system = Fget_coding_system (coding_system);
|
|
|
2600 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2601 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2602 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2603 Fget_coding_system (Qbinary));
|
|
|
2604 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2605 coding_system);
|
|
|
2606 istr = XLSTREAM (instream);
|
|
|
2607 ostr = XLSTREAM (outstream);
|
|
|
2608 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
|
|
|
2609 /* The chain of streams looks like this:
|
|
|
2610
|
|
|
2611 [BUFFER] <----- send through
|
|
|
2612 ------> [ENCODE AS SPECIFIED]
|
|
|
2613 ------> [DECODE AS BINARY]
|
|
|
2614 ------> [BUFFER]
|
|
|
2615 */
|
|
|
2616 while (1)
|
|
|
2617 {
|
|
|
2618 char tempbuf[1024]; /* some random amount */
|
|
|
2619 Bufpos newpos, even_newer_pos;
|
|
|
2620 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
412
|
2621 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
259
|
2622
|
|
|
2623 if (!size_in_bytes)
|
|
|
2624 break;
|
|
|
2625 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2626 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2627 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2628 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2629 even_newer_pos, 0);
|
|
|
2630 }
|
|
|
2631
|
|
|
2632 {
|
|
|
2633 Charcount retlen =
|
|
|
2634 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2635 Lstream_close (istr);
|
|
|
2636 Lstream_close (ostr);
|
|
|
2637 UNGCPRO;
|
|
|
2638 Lstream_delete (istr);
|
|
|
2639 Lstream_delete (ostr);
|
|
|
2640 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2641 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2642 return make_int (retlen);
|
|
|
2643 }
|
|
|
2644 }
|
|
|
2645
|
|
|
2646 #ifdef MULE
|
|
|
2647
|
|
|
2648 /************************************************************************/
|
|
|
2649 /* Shift-JIS methods */
|
|
|
2650 /************************************************************************/
|
|
|
2651
|
|
|
2652 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
|
2653 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
|
396
|
2654 as is. A character of JISX0201-Kana (DIMENSION1_CHARS94 character set) is
|
|
259
|
2655 encoded by "position-code + 0x80". A character of JISX0208
|
|
396
|
2656 (DIMENSION2_CHARS94 character set) is encoded in 2-byte but two
|
|
259
|
2657 position-codes are divided and shifted so that it fit in the range
|
|
|
2658 below.
|
|
|
2659
|
|
|
2660 --- CODE RANGE of Shift-JIS ---
|
|
|
2661 (character set) (range)
|
|
|
2662 ASCII 0x00 .. 0x7F
|
|
|
2663 JISX0201-Kana 0xA0 .. 0xDF
|
|
|
2664 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
|
2665 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
|
2666 -------------------------------
|
|
|
2667
|
|
|
2668 */
|
|
|
2669
|
|
|
2670 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
|
2671
|
|
|
2672 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
|
|
|
2673 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
|
2674
|
|
|
2675 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2676
|
|
|
2677 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
|
|
|
2678 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
|
2679
|
|
|
2680 #define BYTE_SJIS_KATAKANA_P(c) \
|
|
|
2681 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
|
2682
|
|
|
2683 static int
|
|
412
|
2684 detect_coding_sjis (struct detection_state *st, CONST unsigned char *src,
|
|
259
|
2685 unsigned int n)
|
|
|
2686 {
|
|
|
2687 int c;
|
|
|
2688
|
|
|
2689 while (n--)
|
|
|
2690 {
|
|
|
2691 c = *src++;
|
|
|
2692 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
2693 return 0;
|
|
|
2694 if (st->shift_jis.in_second_byte)
|
|
|
2695 {
|
|
|
2696 st->shift_jis.in_second_byte = 0;
|
|
|
2697 if (c < 0x40)
|
|
|
2698 return 0;
|
|
|
2699 }
|
|
|
2700 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
|
2701 st->shift_jis.in_second_byte = 1;
|
|
|
2702 }
|
|
|
2703 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
|
2704 }
|
|
|
2705
|
|
|
2706 /* Convert Shift-JIS data to internal format. */
|
|
|
2707
|
|
|
2708 static void
|
|
412
|
2709 decode_coding_sjis (Lstream *decoding, CONST unsigned char *src,
|
|
259
|
2710 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2711 {
|
|
|
2712 unsigned char c;
|
|
|
2713 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
2714 unsigned int flags = str->flags;
|
|
|
2715 unsigned int ch = str->ch;
|
|
|
2716 eol_type_t eol_type = str->eol_type;
|
|
259
|
2717
|
|
|
2718 while (n--)
|
|
|
2719 {
|
|
|
2720 c = *src++;
|
|
|
2721
|
|
|
2722 if (ch)
|
|
|
2723 {
|
|
|
2724 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
|
2725 if (BYTE_SJIS_TWO_BYTE_2_P (c))
|
|
|
2726 {
|
|
|
2727 unsigned char e1, e2;
|
|
|
2728
|
|
|
2729 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
2730 DECODE_SJIS (ch, c, e1, e2);
|
|
|
2731 Dynarr_add (dst, e1);
|
|
|
2732 Dynarr_add (dst, e2);
|
|
|
2733 }
|
|
|
2734 else
|
|
|
2735 {
|
|
|
2736 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2737 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2738 }
|
|
|
2739 ch = 0;
|
|
|
2740 }
|
|
|
2741 else
|
|
|
2742 {
|
|
|
2743 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
2744 if (BYTE_SJIS_TWO_BYTE_1_P (c))
|
|
|
2745 ch = c;
|
|
|
2746 else if (BYTE_SJIS_KATAKANA_P (c))
|
|
|
2747 {
|
|
|
2748 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
|
|
|
2749 Dynarr_add (dst, c);
|
|
|
2750 }
|
|
|
2751 else
|
|
|
2752 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2753 }
|
|
|
2754 label_continue_loop:;
|
|
|
2755 }
|
|
|
2756
|
|
|
2757 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2758
|
|
396
|
2759 str->flags = flags;
|
|
|
2760 str->ch = ch;
|
|
259
|
2761 }
|
|
|
2762
|
|
|
2763 /* Convert internally-formatted data to Shift-JIS. */
|
|
|
2764
|
|
|
2765 static void
|
|
412
|
2766 encode_coding_sjis (Lstream *encoding, CONST unsigned char *src,
|
|
259
|
2767 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2768 {
|
|
|
2769 unsigned char c;
|
|
|
2770 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
2771 unsigned int flags = str->flags;
|
|
|
2772 unsigned int ch = str->ch;
|
|
|
2773 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
2774
|
|
|
2775 while (n--)
|
|
|
2776 {
|
|
|
2777 c = *src++;
|
|
|
2778 if (c == '\n')
|
|
|
2779 {
|
|
|
2780 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
2781 Dynarr_add (dst, '\r');
|
|
|
2782 if (eol_type != EOL_CR)
|
|
|
2783 Dynarr_add (dst, '\n');
|
|
|
2784 ch = 0;
|
|
|
2785 }
|
|
|
2786 else if (BYTE_ASCII_P (c))
|
|
|
2787 {
|
|
|
2788 Dynarr_add (dst, c);
|
|
|
2789 ch = 0;
|
|
|
2790 }
|
|
|
2791 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
2792 ch = (c == LEADING_BYTE_KATAKANA_JISX0201 ||
|
|
|
2793 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2794 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
|
2795 else if (ch)
|
|
|
2796 {
|
|
|
2797 if (ch == LEADING_BYTE_KATAKANA_JISX0201)
|
|
|
2798 {
|
|
|
2799 Dynarr_add (dst, c);
|
|
|
2800 ch = 0;
|
|
|
2801 }
|
|
|
2802 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2803 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
|
2804 ch = c;
|
|
|
2805 else
|
|
|
2806 {
|
|
|
2807 unsigned char j1, j2;
|
|
|
2808 ENCODE_SJIS (ch, c, j1, j2);
|
|
|
2809 Dynarr_add (dst, j1);
|
|
|
2810 Dynarr_add (dst, j2);
|
|
|
2811 ch = 0;
|
|
|
2812 }
|
|
|
2813 }
|
|
|
2814 }
|
|
|
2815
|
|
396
|
2816 str->flags = flags;
|
|
|
2817 str->ch = ch;
|
|
259
|
2818 }
|
|
|
2819
|
|
|
2820 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
|
2821 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
|
2822 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
|
2823 Return the corresponding character.
|
|
|
2824 */
|
|
|
2825 (code))
|
|
|
2826 {
|
|
|
2827 unsigned char c1, c2, s1, s2;
|
|
|
2828
|
|
|
2829 CHECK_CONS (code);
|
|
|
2830 CHECK_INT (XCAR (code));
|
|
|
2831 CHECK_INT (XCDR (code));
|
|
|
2832 s1 = XINT (XCAR (code));
|
|
|
2833 s2 = XINT (XCDR (code));
|
|
|
2834 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
|
|
|
2835 BYTE_SJIS_TWO_BYTE_2_P (s2))
|
|
|
2836 {
|
|
|
2837 DECODE_SJIS (s1, s2, c1, c2);
|
|
|
2838 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
|
2839 c1 & 0x7F, c2 & 0x7F));
|
|
|
2840 }
|
|
|
2841 else
|
|
|
2842 return Qnil;
|
|
|
2843 }
|
|
|
2844
|
|
|
2845 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
|
2846 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
|
2847 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
|
2848 */
|
|
|
2849 (ch))
|
|
|
2850 {
|
|
|
2851 Lisp_Object charset;
|
|
|
2852 int c1, c2, s1, s2;
|
|
|
2853
|
|
|
2854 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2855 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2856 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
|
2857 {
|
|
|
2858 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
|
2859 return Fcons (make_int (s1), make_int (s2));
|
|
|
2860 }
|
|
|
2861 else
|
|
|
2862 return Qnil;
|
|
|
2863 }
|
|
|
2864
|
|
|
2865
|
|
|
2866 /************************************************************************/
|
|
|
2867 /* Big5 methods */
|
|
|
2868 /************************************************************************/
|
|
|
2869
|
|
|
2870 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
|
2871 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
|
2872 character set and is encoded in two-byte.
|
|
|
2873
|
|
|
2874 --- CODE RANGE of BIG5 ---
|
|
|
2875 (character set) (range)
|
|
|
2876 ASCII 0x00 .. 0x7F
|
|
|
2877 Big5 (1st byte) 0xA1 .. 0xFE
|
|
|
2878 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
|
2879 --------------------------
|
|
|
2880
|
|
|
2881 Since the number of characters in Big5 is larger than maximum
|
|
|
2882 characters in Emacs' charset (96x96), it can't be handled as one
|
|
380
|
2883 charset. So, in Emacs, Big5 is divided into two: `charset-big5-1'
|
|
396
|
2884 and `charset-big5-2'. Both <type>s are DIMENSION2_CHARS94. The former
|
|
259
|
2885 contains frequently used characters and the latter contains less
|
|
|
2886 frequently used characters. */
|
|
|
2887
|
|
|
2888 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
|
2889 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
|
2890
|
|
|
2891 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2892
|
|
|
2893 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
|
2894 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
|
2895
|
|
|
2896 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
|
2897
|
|
|
2898 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
|
2899
|
|
|
2900 /* Code conversion macros. These are macros because they are used in
|
|
|
2901 inner loops during code conversion.
|
|
|
2902
|
|
|
2903 Note that temporary variables in macros introduce the classic
|
|
|
2904 dynamic-scoping problems with variable names. We use capital-
|
|
|
2905 lettered variables in the assumption that XEmacs does not use
|
|
|
2906 capital letters in variables except in a very formalized way
|
|
|
2907 (e.g. Qstring). */
|
|
|
2908
|
|
|
2909 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
|
2910 (lb, c1, c2). */
|
|
|
2911
|
|
|
2912 /* There is a much simpler way to split the Big5 charset into two.
|
|
|
2913 For the moment I'm going to leave the algorithm as-is because it
|
|
|
2914 claims to separate out the most-used characters into a single
|
|
|
2915 charset, which perhaps will lead to optimizations in various
|
|
|
2916 places.
|
|
|
2917
|
|
|
2918 The way the algorithm works is something like this:
|
|
|
2919
|
|
|
2920 Big5 can be viewed as a 94x157 charset, where the row is
|
|
|
2921 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
|
2922 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
|
2923 the split between low and high column numbers is apparently
|
|
|
2924 meaningless; ascending rows produce less and less frequent chars.
|
|
|
2925 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
|
2926 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
|
2927 second. To do the conversion, we convert the character into
|
|
|
2928 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
|
2929 is the second, etc. That way, the characters are ordered by
|
|
|
2930 decreasing frequency. Then we just chop the space in two
|
|
|
2931 and coerce the result into a 94x94 space.
|
|
|
2932 */
|
|
|
2933
|
|
|
2934 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
|
2935 { \
|
|
|
2936 int B1 = b1, B2 = b2; \
|
|
|
2937 unsigned int I \
|
|
|
2938 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
|
2939 \
|
|
|
2940 if (B1 < 0xC9) \
|
|
|
2941 { \
|
|
|
2942 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
|
2943 } \
|
|
|
2944 else \
|
|
|
2945 { \
|
|
|
2946 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
|
2947 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
|
2948 } \
|
|
|
2949 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
|
2950 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
|
2951 } while (0)
|
|
|
2952
|
|
|
2953 /* Convert the internal string representation of a Big5 character
|
|
|
2954 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
|
2955
|
|
|
2956 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
|
2957 { \
|
|
|
2958 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
|
2959 \
|
|
|
2960 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
|
2961 { \
|
|
|
2962 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
|
2963 } \
|
|
|
2964 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
|
2965 b2 = I % BIG5_SAME_ROW; \
|
|
|
2966 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
|
2967 } while (0)
|
|
|
2968
|
|
|
2969 static int
|
|
412
|
2970 detect_coding_big5 (struct detection_state *st, CONST unsigned char *src,
|
|
259
|
2971 unsigned int n)
|
|
|
2972 {
|
|
|
2973 int c;
|
|
|
2974
|
|
|
2975 while (n--)
|
|
|
2976 {
|
|
|
2977 c = *src++;
|
|
|
2978 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
|
2979 (c >= 0x80 && c <= 0xA0))
|
|
|
2980 return 0;
|
|
|
2981 if (st->big5.in_second_byte)
|
|
|
2982 {
|
|
|
2983 st->big5.in_second_byte = 0;
|
|
|
2984 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
|
2985 return 0;
|
|
|
2986 }
|
|
|
2987 else if (c >= 0xA1)
|
|
|
2988 st->big5.in_second_byte = 1;
|
|
|
2989 }
|
|
|
2990 return CODING_CATEGORY_BIG5_MASK;
|
|
|
2991 }
|
|
|
2992
|
|
|
2993 /* Convert Big5 data to internal format. */
|
|
|
2994
|
|
|
2995 static void
|
|
412
|
2996 decode_coding_big5 (Lstream *decoding, CONST unsigned char *src,
|
|
259
|
2997 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2998 {
|
|
|
2999 unsigned char c;
|
|
|
3000 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
3001 unsigned int flags = str->flags;
|
|
|
3002 unsigned int ch = str->ch;
|
|
|
3003 eol_type_t eol_type = str->eol_type;
|
|
259
|
3004
|
|
|
3005 while (n--)
|
|
|
3006 {
|
|
|
3007 c = *src++;
|
|
|
3008 if (ch)
|
|
|
3009 {
|
|
|
3010 /* Previous character was first byte of Big5 char. */
|
|
|
3011 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
|
3012 {
|
|
|
3013 unsigned char b1, b2, b3;
|
|
|
3014 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
|
3015 Dynarr_add (dst, b1);
|
|
|
3016 Dynarr_add (dst, b2);
|
|
|
3017 Dynarr_add (dst, b3);
|
|
|
3018 }
|
|
|
3019 else
|
|
|
3020 {
|
|
|
3021 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
3022 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3023 }
|
|
|
3024 ch = 0;
|
|
|
3025 }
|
|
|
3026 else
|
|
|
3027 {
|
|
|
3028 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3029 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
|
3030 ch = c;
|
|
|
3031 else
|
|
|
3032 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3033 }
|
|
|
3034 label_continue_loop:;
|
|
|
3035 }
|
|
|
3036
|
|
|
3037 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
3038
|
|
396
|
3039 str->flags = flags;
|
|
|
3040 str->ch = ch;
|
|
259
|
3041 }
|
|
|
3042
|
|
|
3043 /* Convert internally-formatted data to Big5. */
|
|
|
3044
|
|
|
3045 static void
|
|
412
|
3046 encode_coding_big5 (Lstream *encoding, CONST unsigned char *src,
|
|
259
|
3047 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3048 {
|
|
|
3049 unsigned char c;
|
|
|
3050 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
3051 unsigned int flags = str->flags;
|
|
|
3052 unsigned int ch = str->ch;
|
|
|
3053 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
3054
|
|
|
3055 while (n--)
|
|
|
3056 {
|
|
|
3057 c = *src++;
|
|
|
3058 if (c == '\n')
|
|
|
3059 {
|
|
|
3060 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3061 Dynarr_add (dst, '\r');
|
|
|
3062 if (eol_type != EOL_CR)
|
|
|
3063 Dynarr_add (dst, '\n');
|
|
|
3064 }
|
|
|
3065 else if (BYTE_ASCII_P (c))
|
|
|
3066 {
|
|
|
3067 /* ASCII. */
|
|
|
3068 Dynarr_add (dst, c);
|
|
|
3069 }
|
|
|
3070 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
3071 {
|
|
|
3072 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3073 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3074 {
|
|
|
3075 /* A recognized leading byte. */
|
|
|
3076 ch = c;
|
|
|
3077 continue; /* not done with this character. */
|
|
|
3078 }
|
|
|
3079 /* otherwise just ignore this character. */
|
|
|
3080 }
|
|
|
3081 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3082 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3083 {
|
|
|
3084 /* Previous char was a recognized leading byte. */
|
|
|
3085 ch = (ch << 8) | c;
|
|
|
3086 continue; /* not done with this character. */
|
|
|
3087 }
|
|
|
3088 else if (ch)
|
|
|
3089 {
|
|
|
3090 /* Encountering second byte of a Big5 character. */
|
|
|
3091 unsigned char b1, b2;
|
|
|
3092
|
|
|
3093 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
|
3094 Dynarr_add (dst, b1);
|
|
|
3095 Dynarr_add (dst, b2);
|
|
|
3096 }
|
|
|
3097
|
|
|
3098 ch = 0;
|
|
|
3099 }
|
|
|
3100
|
|
396
|
3101 str->flags = flags;
|
|
|
3102 str->ch = ch;
|
|
259
|
3103 }
|
|
|
3104
|
|
|
3105
|
|
|
3106 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
|
3107 Decode a Big5 character CODE of BIG5 coding-system.
|
|
|
3108 CODE is the character code in BIG5, a cons of two integers.
|
|
|
3109 Return the corresponding character.
|
|
|
3110 */
|
|
|
3111 (code))
|
|
|
3112 {
|
|
|
3113 unsigned char c1, c2, b1, b2;
|
|
|
3114
|
|
|
3115 CHECK_CONS (code);
|
|
|
3116 CHECK_INT (XCAR (code));
|
|
|
3117 CHECK_INT (XCDR (code));
|
|
|
3118 b1 = XINT (XCAR (code));
|
|
|
3119 b2 = XINT (XCDR (code));
|
|
|
3120 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
|
3121 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
|
3122 {
|
|
|
3123 int leading_byte;
|
|
|
3124 Lisp_Object charset;
|
|
|
3125 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
|
|
|
3126 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
|
|
|
3127 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
|
3128 }
|
|
|
3129 else
|
|
|
3130 return Qnil;
|
|
|
3131 }
|
|
|
3132
|
|
|
3133 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
|
3134 Encode the Big5 character CH to BIG5 coding-system.
|
|
|
3135 Return the corresponding character code in Big5.
|
|
|
3136 */
|
|
|
3137 (ch))
|
|
|
3138 {
|
|
|
3139 Lisp_Object charset;
|
|
|
3140 int c1, c2, b1, b2;
|
|
|
3141
|
|
|
3142 CHECK_CHAR_COERCE_INT (ch);
|
|
|
3143 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
3144 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
|
3145 EQ (charset, Vcharset_chinese_big5_2))
|
|
|
3146 {
|
|
|
3147 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
|
3148 b1, b2);
|
|
|
3149 return Fcons (make_int (b1), make_int (b2));
|
|
|
3150 }
|
|
|
3151 else
|
|
|
3152 return Qnil;
|
|
|
3153 }
|
|
|
3154
|
|
|
3155
|
|
|
3156 /************************************************************************/
|
|
396
|
3157 /* UCS-4 methods */
|
|
|
3158 /* */
|
|
|
3159 /* UCS-4 character codes are implemented as nonnegative integers. */
|
|
|
3160 /* */
|
|
|
3161 /************************************************************************/
|
|
|
3162
|
|
412
|
3163 Lisp_Object ucs_to_mule_table[65536];
|
|
|
3164 Lisp_Object mule_to_ucs_table;
|
|
396
|
3165
|
|
|
3166 DEFUN ("set-ucs-char", Fset_ucs_char, 2, 2, 0, /*
|
|
|
3167 Map UCS-4 code CODE to Mule character CHARACTER.
|
|
|
3168
|
|
|
3169 Return T on success, NIL on failure.
|
|
|
3170 */
|
|
|
3171 (code, character))
|
|
|
3172 {
|
|
|
3173 unsigned int c;
|
|
|
3174
|
|
|
3175 CHECK_CHAR (character);
|
|
|
3176 CHECK_INT (code);
|
|
|
3177 c = XINT (code);
|
|
|
3178
|
|
412
|
3179 if (c < sizeof (ucs_to_mule_table))
|
|
396
|
3180 {
|
|
412
|
3181 ucs_to_mule_table[c] = character;
|
|
396
|
3182 return Qt;
|
|
|
3183 }
|
|
|
3184 else
|
|
|
3185 return Qnil;
|
|
|
3186 }
|
|
|
3187
|
|
|
3188 static Lisp_Object
|
|
|
3189 ucs_to_char (unsigned long code)
|
|
|
3190 {
|
|
412
|
3191 if (code < sizeof (ucs_to_mule_table))
|
|
396
|
3192 {
|
|
412
|
3193 return ucs_to_mule_table[code];
|
|
396
|
3194 }
|
|
|
3195 else if ((0xe00000 <= code) && (code <= 0xe00000 + 94 * 94 * 14))
|
|
|
3196 {
|
|
|
3197 unsigned int c;
|
|
|
3198
|
|
|
3199 code -= 0xe00000;
|
|
|
3200 c = code % (94 * 94);
|
|
|
3201 return make_char
|
|
|
3202 (MAKE_CHAR (CHARSET_BY_ATTRIBUTES
|
|
|
3203 (CHARSET_TYPE_94X94, code / (94 * 94) + '@',
|
|
|
3204 CHARSET_LEFT_TO_RIGHT),
|
|
|
3205 c / 94 + 33, c % 94 + 33));
|
|
|
3206 }
|
|
|
3207 else
|
|
|
3208 return Qnil;
|
|
|
3209 }
|
|
|
3210
|
|
|
3211 DEFUN ("ucs-char", Fucs_char, 1, 1, 0, /*
|
|
|
3212 Return Mule character corresponding to UCS code CODE (a positive integer).
|
|
|
3213 */
|
|
|
3214 (code))
|
|
|
3215 {
|
|
|
3216 CHECK_NATNUM (code);
|
|
|
3217 return ucs_to_char (XINT (code));
|
|
|
3218 }
|
|
|
3219
|
|
|
3220 DEFUN ("set-char-ucs", Fset_char_ucs, 2, 2, 0, /*
|
|
|
3221 Map Mule character CHARACTER to UCS code CODE (a positive integer).
|
|
|
3222 */
|
|
|
3223 (character, code))
|
|
|
3224 {
|
|
|
3225 /* #### Isn't this gilding the lily? Fput_char_table checks its args.
|
|
|
3226 Fset_char_ucs is more restrictive on index arg, but should
|
|
|
3227 check code arg in a char_table method. */
|
|
|
3228 CHECK_CHAR (character);
|
|
|
3229 CHECK_NATNUM (code);
|
|
|
3230 return Fput_char_table (character, code, mule_to_ucs_table);
|
|
|
3231 }
|
|
|
3232
|
|
|
3233 DEFUN ("char-ucs", Fchar_ucs, 1, 1, 0, /*
|
|
|
3234 Return the UCS code (a positive integer) corresponding to CHARACTER.
|
|
|
3235 */
|
|
|
3236 (character))
|
|
|
3237 {
|
|
|
3238 return Fget_char_table (character, mule_to_ucs_table);
|
|
|
3239 }
|
|
|
3240
|
|
|
3241 /* Decode a UCS-4 character into a buffer. If the lookup fails, use
|
|
398
|
3242 <GETA MARK> (U+3013) of JIS X 0208, which means correct character
|
|
|
3243 is not found, instead.
|
|
396
|
3244 #### do something more appropriate (use blob?)
|
|
|
3245 Danger, Will Robinson! Data loss. Should we signal user? */
|
|
|
3246 static void
|
|
|
3247 decode_ucs4 (unsigned long ch, unsigned_char_dynarr *dst)
|
|
|
3248 {
|
|
|
3249 Lisp_Object chr = ucs_to_char (ch);
|
|
|
3250
|
|
|
3251 if (! NILP (chr))
|
|
|
3252 {
|
|
|
3253 Bufbyte work[MAX_EMCHAR_LEN];
|
|
|
3254 int len;
|
|
|
3255
|
|
|
3256 ch = XCHAR (chr);
|
|
|
3257 len = (ch < 128) ?
|
|
|
3258 simple_set_charptr_emchar (work, ch) :
|
|
|
3259 non_ascii_set_charptr_emchar (work, ch);
|
|
|
3260 Dynarr_add_many (dst, work, len);
|
|
|
3261 }
|
|
|
3262 else
|
|
|
3263 {
|
|
|
3264 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
3265 Dynarr_add (dst, 34 + 128);
|
|
|
3266 Dynarr_add (dst, 46 + 128);
|
|
|
3267 }
|
|
|
3268 }
|
|
|
3269
|
|
|
3270 static unsigned long
|
|
|
3271 mule_char_to_ucs4 (Lisp_Object charset,
|
|
|
3272 unsigned char h, unsigned char l)
|
|
|
3273 {
|
|
|
3274 Lisp_Object code
|
|
|
3275 = Fget_char_table (make_char (MAKE_CHAR (charset, h & 127, l & 127)),
|
|
|
3276 mule_to_ucs_table);
|
|
|
3277
|
|
|
3278 if (INTP (code))
|
|
|
3279 {
|
|
|
3280 return XINT (code);
|
|
|
3281 }
|
|
|
3282 else if ( (XCHARSET_DIMENSION (charset) == 2) &&
|
|
|
3283 (XCHARSET_CHARS (charset) == 94) )
|
|
|
3284 {
|
|
|
3285 unsigned char final = XCHARSET_FINAL (charset);
|
|
|
3286
|
|
|
3287 if ( ('@' <= final) && (final < 0x7f) )
|
|
|
3288 {
|
|
|
3289 return 0xe00000 + (final - '@') * 94 * 94
|
|
|
3290 + ((h & 127) - 33) * 94 + (l & 127) - 33;
|
|
|
3291 }
|
|
|
3292 else
|
|
|
3293 {
|
|
|
3294 return '?';
|
|
|
3295 }
|
|
|
3296 }
|
|
|
3297 else
|
|
|
3298 {
|
|
|
3299 return '?';
|
|
|
3300 }
|
|
|
3301 }
|
|
|
3302
|
|
|
3303 static void
|
|
|
3304 encode_ucs4 (Lisp_Object charset,
|
|
|
3305 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3306 {
|
|
|
3307 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3308 Dynarr_add (dst, code >> 24);
|
|
|
3309 Dynarr_add (dst, (code >> 16) & 255);
|
|
|
3310 Dynarr_add (dst, (code >> 8) & 255);
|
|
|
3311 Dynarr_add (dst, code & 255);
|
|
|
3312 }
|
|
|
3313
|
|
|
3314 static int
|
|
412
|
3315 detect_coding_ucs4 (struct detection_state *st, CONST unsigned char *src,
|
|
396
|
3316 unsigned int n)
|
|
|
3317 {
|
|
|
3318 while (n--)
|
|
|
3319 {
|
|
|
3320 int c = *src++;
|
|
|
3321 switch (st->ucs4.in_byte)
|
|
|
3322 {
|
|
|
3323 case 0:
|
|
|
3324 if (c >= 128)
|
|
|
3325 return 0;
|
|
|
3326 else
|
|
|
3327 st->ucs4.in_byte++;
|
|
|
3328 break;
|
|
|
3329 case 3:
|
|
|
3330 st->ucs4.in_byte = 0;
|
|
|
3331 break;
|
|
|
3332 default:
|
|
|
3333 st->ucs4.in_byte++;
|
|
|
3334 }
|
|
|
3335 }
|
|
|
3336 return CODING_CATEGORY_UCS4_MASK;
|
|
|
3337 }
|
|
|
3338
|
|
|
3339 static void
|
|
412
|
3340 decode_coding_ucs4 (Lstream *decoding, CONST unsigned char *src,
|
|
396
|
3341 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3342 {
|
|
|
3343 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3344 unsigned int flags = str->flags;
|
|
|
3345 unsigned int ch = str->ch;
|
|
|
3346
|
|
|
3347 while (n--)
|
|
|
3348 {
|
|
|
3349 unsigned char c = *src++;
|
|
412
|
3350 switch (flags)
|
|
396
|
3351 {
|
|
|
3352 case 0:
|
|
|
3353 ch = c;
|
|
412
|
3354 flags = 3;
|
|
396
|
3355 break;
|
|
|
3356 case 1:
|
|
|
3357 decode_ucs4 ( ( ch << 8 ) | c, dst);
|
|
|
3358 ch = 0;
|
|
412
|
3359 flags = 0;
|
|
396
|
3360 break;
|
|
|
3361 default:
|
|
|
3362 ch = ( ch << 8 ) | c;
|
|
412
|
3363 flags--;
|
|
396
|
3364 }
|
|
|
3365 }
|
|
412
|
3366 if (flags & CODING_STATE_END)
|
|
396
|
3367 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3368
|
|
|
3369 str->flags = flags;
|
|
|
3370 str->ch = ch;
|
|
|
3371 }
|
|
|
3372
|
|
|
3373 static void
|
|
412
|
3374 encode_coding_ucs4 (Lstream *encoding, CONST unsigned char *src,
|
|
396
|
3375 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3376 {
|
|
|
3377 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3378 unsigned int flags = str->flags;
|
|
|
3379 unsigned int ch = str->ch;
|
|
|
3380 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3381 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3382
|
|
|
3383 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3384 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3385 on the source while we're outputting the composite char. */
|
|
|
3386 unsigned int saved_n = 0;
|
|
412
|
3387 CONST unsigned char *saved_src = NULL;
|
|
396
|
3388 int in_composite = 0;
|
|
|
3389
|
|
|
3390 back_to_square_n:
|
|
|
3391 #endif
|
|
|
3392
|
|
|
3393 while (n--)
|
|
|
3394 {
|
|
|
3395 unsigned char c = *src++;
|
|
|
3396
|
|
|
3397 if (BYTE_ASCII_P (c))
|
|
|
3398 { /* Processing ASCII character */
|
|
|
3399 ch = 0;
|
|
|
3400 encode_ucs4 (Vcharset_ascii, c, 0, dst);
|
|
|
3401 char_boundary = 1;
|
|
|
3402 }
|
|
|
3403 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3404 { /* Processing Leading Byte */
|
|
|
3405 ch = 0;
|
|
|
3406 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3407 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3408 ch = c;
|
|
|
3409 char_boundary = 0;
|
|
|
3410 }
|
|
|
3411 else
|
|
|
3412 { /* Processing Non-ASCII character */
|
|
|
3413 char_boundary = 1;
|
|
|
3414 if (EQ (charset, Vcharset_control_1))
|
|
|
3415 {
|
|
|
3416 encode_ucs4 (Vcharset_control_1, c, 0, dst);
|
|
|
3417 }
|
|
|
3418 else
|
|
|
3419 {
|
|
|
3420 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3421 {
|
|
|
3422 case 2:
|
|
|
3423 encode_ucs4 (charset, c, 0, dst);
|
|
|
3424 break;
|
|
|
3425 case 3:
|
|
|
3426 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3427 {
|
|
|
3428 encode_ucs4 (charset, c, 0, dst);
|
|
|
3429 ch = 0;
|
|
|
3430 }
|
|
|
3431 else if (ch)
|
|
|
3432 {
|
|
|
3433 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3434 if (EQ (charset, Vcharset_composite))
|
|
|
3435 {
|
|
|
3436 if (in_composite)
|
|
|
3437 {
|
|
|
3438 /* #### Bother! We don't know how to
|
|
|
3439 handle this yet. */
|
|
|
3440 Dynarr_add (dst, 0);
|
|
|
3441 Dynarr_add (dst, 0);
|
|
|
3442 Dynarr_add (dst, 0);
|
|
|
3443 Dynarr_add (dst, '~');
|
|
|
3444 }
|
|
|
3445 else
|
|
|
3446 {
|
|
|
3447 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
3448 ch & 0x7F, c & 0x7F);
|
|
|
3449 Lisp_Object lstr = composite_char_string (emch);
|
|
|
3450 saved_n = n;
|
|
|
3451 saved_src = src;
|
|
|
3452 in_composite = 1;
|
|
|
3453 src = XSTRING_DATA (lstr);
|
|
|
3454 n = XSTRING_LENGTH (lstr);
|
|
|
3455 }
|
|
|
3456 }
|
|
|
3457 else
|
|
|
3458 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3459 {
|
|
|
3460 encode_ucs4(charset, ch, c, dst);
|
|
|
3461 }
|
|
|
3462 ch = 0;
|
|
|
3463 }
|
|
|
3464 else
|
|
|
3465 {
|
|
|
3466 ch = c;
|
|
|
3467 char_boundary = 0;
|
|
|
3468 }
|
|
|
3469 break;
|
|
|
3470 case 4:
|
|
|
3471 if (ch)
|
|
|
3472 {
|
|
|
3473 encode_ucs4 (charset, ch, c, dst);
|
|
|
3474 ch = 0;
|
|
|
3475 }
|
|
|
3476 else
|
|
|
3477 {
|
|
|
3478 ch = c;
|
|
|
3479 char_boundary = 0;
|
|
|
3480 }
|
|
|
3481 break;
|
|
|
3482 default:
|
|
|
3483 abort ();
|
|
|
3484 }
|
|
|
3485 }
|
|
|
3486 }
|
|
|
3487 }
|
|
|
3488
|
|
|
3489 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3490 if (in_composite)
|
|
|
3491 {
|
|
|
3492 n = saved_n;
|
|
|
3493 src = saved_src;
|
|
|
3494 in_composite = 0;
|
|
|
3495 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
3496 }
|
|
|
3497 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3498
|
|
|
3499 str->flags = flags;
|
|
|
3500 str->ch = ch;
|
|
|
3501 str->iso2022.current_char_boundary = char_boundary;
|
|
|
3502 str->iso2022.current_charset = charset;
|
|
|
3503
|
|
|
3504 /* Verbum caro factum est! */
|
|
|
3505 }
|
|
|
3506
|
|
|
3507
|
|
|
3508 /************************************************************************/
|
|
|
3509 /* UTF-8 methods */
|
|
|
3510 /************************************************************************/
|
|
|
3511
|
|
|
3512 static int
|
|
412
|
3513 detect_coding_utf8 (struct detection_state *st, CONST unsigned char *src,
|
|
396
|
3514 unsigned int n)
|
|
|
3515 {
|
|
|
3516 while (n--)
|
|
|
3517 {
|
|
|
3518 unsigned char c = *src++;
|
|
|
3519 switch (st->utf8.in_byte)
|
|
|
3520 {
|
|
|
3521 case 0:
|
|
|
3522 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
3523 return 0;
|
|
|
3524 else if (c >= 0xfc)
|
|
|
3525 st->utf8.in_byte = 5;
|
|
|
3526 else if (c >= 0xf8)
|
|
|
3527 st->utf8.in_byte = 4;
|
|
|
3528 else if (c >= 0xf0)
|
|
|
3529 st->utf8.in_byte = 3;
|
|
|
3530 else if (c >= 0xe0)
|
|
|
3531 st->utf8.in_byte = 2;
|
|
|
3532 else if (c >= 0xc0)
|
|
|
3533 st->utf8.in_byte = 1;
|
|
|
3534 else if (c >= 0x80)
|
|
|
3535 return 0;
|
|
|
3536 break;
|
|
|
3537 default:
|
|
|
3538 if ((c & 0xc0) != 0x80)
|
|
|
3539 return 0;
|
|
|
3540 else
|
|
|
3541 st->utf8.in_byte--;
|
|
|
3542 }
|
|
|
3543 }
|
|
|
3544 return CODING_CATEGORY_UTF8_MASK;
|
|
|
3545 }
|
|
|
3546
|
|
|
3547 static void
|
|
412
|
3548 decode_coding_utf8 (Lstream *decoding, CONST unsigned char *src,
|
|
396
|
3549 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3550 {
|
|
|
3551 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3552 unsigned int flags = str->flags;
|
|
|
3553 unsigned int ch = str->ch;
|
|
|
3554 eol_type_t eol_type = str->eol_type;
|
|
|
3555
|
|
|
3556 while (n--)
|
|
|
3557 {
|
|
|
3558 unsigned char c = *src++;
|
|
412
|
3559 switch (flags)
|
|
396
|
3560 {
|
|
|
3561 case 0:
|
|
|
3562 if ( c >= 0xfc )
|
|
|
3563 {
|
|
|
3564 ch = c & 0x01;
|
|
412
|
3565 flags = 5;
|
|
396
|
3566 }
|
|
|
3567 else if ( c >= 0xf8 )
|
|
|
3568 {
|
|
|
3569 ch = c & 0x03;
|
|
412
|
3570 flags = 4;
|
|
396
|
3571 }
|
|
|
3572 else if ( c >= 0xf0 )
|
|
|
3573 {
|
|
|
3574 ch = c & 0x07;
|
|
412
|
3575 flags = 3;
|
|
396
|
3576 }
|
|
|
3577 else if ( c >= 0xe0 )
|
|
|
3578 {
|
|
|
3579 ch = c & 0x0f;
|
|
412
|
3580 flags = 2;
|
|
396
|
3581 }
|
|
|
3582 else if ( c >= 0xc0 )
|
|
|
3583 {
|
|
|
3584 ch = c & 0x1f;
|
|
412
|
3585 flags = 1;
|
|
396
|
3586 }
|
|
|
3587 else
|
|
|
3588 {
|
|
|
3589 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3590 decode_ucs4 (c, dst);
|
|
|
3591 }
|
|
|
3592 break;
|
|
|
3593 case 1:
|
|
|
3594 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
|
3595 decode_ucs4 (ch, dst);
|
|
|
3596 ch = 0;
|
|
412
|
3597 flags = 0;
|
|
396
|
3598 break;
|
|
|
3599 default:
|
|
|
3600 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
412
|
3601 flags--;
|
|
396
|
3602 }
|
|
|
3603 label_continue_loop:;
|
|
|
3604 }
|
|
|
3605
|
|
|
3606 if (flags & CODING_STATE_END)
|
|
|
3607 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3608
|
|
|
3609 str->flags = flags;
|
|
|
3610 str->ch = ch;
|
|
|
3611 }
|
|
|
3612
|
|
|
3613 static void
|
|
|
3614 encode_utf8 (Lisp_Object charset,
|
|
|
3615 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3616 {
|
|
|
3617 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3618 if ( code <= 0x7f )
|
|
|
3619 {
|
|
|
3620 Dynarr_add (dst, code);
|
|
|
3621 }
|
|
|
3622 else if ( code <= 0x7ff )
|
|
|
3623 {
|
|
|
3624 Dynarr_add (dst, (code >> 6) | 0xc0);
|
|
|
3625 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3626 }
|
|
|
3627 else if ( code <= 0xffff )
|
|
|
3628 {
|
|
|
3629 Dynarr_add (dst, (code >> 12) | 0xe0);
|
|
|
3630 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3631 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3632 }
|
|
|
3633 else if ( code <= 0x1fffff )
|
|
|
3634 {
|
|
|
3635 Dynarr_add (dst, (code >> 18) | 0xf0);
|
|
|
3636 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3637 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3638 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3639 }
|
|
|
3640 else if ( code <= 0x3ffffff )
|
|
|
3641 {
|
|
|
3642 Dynarr_add (dst, (code >> 24) | 0xf8);
|
|
|
3643 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3644 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3645 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3646 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3647 }
|
|
|
3648 else
|
|
|
3649 {
|
|
|
3650 Dynarr_add (dst, (code >> 30) | 0xfc);
|
|
|
3651 Dynarr_add (dst, ((code >> 24) & 0x3f) | 0x80);
|
|
|
3652 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3653 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3654 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3655 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3656 }
|
|
|
3657 }
|
|
|
3658
|
|
|
3659 static void
|
|
412
|
3660 encode_coding_utf8 (Lstream *encoding, CONST unsigned char *src,
|
|
396
|
3661 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3662 {
|
|
|
3663 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3664 unsigned int flags = str->flags;
|
|
|
3665 unsigned int ch = str->ch;
|
|
|
3666 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3667 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3668 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3669
|
|
|
3670 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3671 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3672 on the source while we're outputting the composite char. */
|
|
|
3673 unsigned int saved_n = 0;
|
|
412
|
3674 CONST unsigned char *saved_src = NULL;
|
|
396
|
3675 int in_composite = 0;
|
|
|
3676
|
|
|
3677 back_to_square_n:
|
|
|
3678 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
412
|
3679
|
|
396
|
3680 while (n--)
|
|
|
3681 {
|
|
|
3682 unsigned char c = *src++;
|
|
|
3683
|
|
|
3684 if (BYTE_ASCII_P (c))
|
|
|
3685 { /* Processing ASCII character */
|
|
|
3686 ch = 0;
|
|
|
3687 if (c == '\n')
|
|
|
3688 {
|
|
|
3689 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3690 Dynarr_add (dst, '\r');
|
|
|
3691 if (eol_type != EOL_CR)
|
|
|
3692 Dynarr_add (dst, c);
|
|
|
3693 }
|
|
|
3694 else
|
|
|
3695 encode_utf8 (Vcharset_ascii, c, 0, dst);
|
|
|
3696 char_boundary = 1;
|
|
|
3697 }
|
|
|
3698 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3699 { /* Processing Leading Byte */
|
|
|
3700 ch = 0;
|
|
|
3701 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3702 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3703 ch = c;
|
|
|
3704 char_boundary = 0;
|
|
|
3705 }
|
|
|
3706 else
|
|
|
3707 { /* Processing Non-ASCII character */
|
|
|
3708 char_boundary = 1;
|
|
|
3709 if (EQ (charset, Vcharset_control_1))
|
|
|
3710 {
|
|
|
3711 encode_utf8 (Vcharset_control_1, c, 0, dst);
|
|
|
3712 }
|
|
|
3713 else
|
|
|
3714 {
|
|
|
3715 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3716 {
|
|
|
3717 case 2:
|
|
|
3718 encode_utf8 (charset, c, 0, dst);
|
|
|
3719 break;
|
|
|
3720 case 3:
|
|
|
3721 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3722 {
|
|
|
3723 encode_utf8 (charset, c, 0, dst);
|
|
|
3724 ch = 0;
|
|
|
3725 }
|
|
|
3726 else if (ch)
|
|
|
3727 {
|
|
|
3728 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3729 if (EQ (charset, Vcharset_composite))
|
|
|
3730 {
|
|
|
3731 if (in_composite)
|
|
|
3732 {
|
|
|
3733 /* #### Bother! We don't know how to
|
|
|
3734 handle this yet. */
|
|
|
3735 encode_utf8 (Vcharset_ascii, '~', 0, dst);
|
|
|
3736 }
|
|
|
3737 else
|
|
|
3738 {
|
|
|
3739 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
3740 ch & 0x7F, c & 0x7F);
|
|
|
3741 Lisp_Object lstr = composite_char_string (emch);
|
|
|
3742 saved_n = n;
|
|
|
3743 saved_src = src;
|
|
|
3744 in_composite = 1;
|
|
|
3745 src = XSTRING_DATA (lstr);
|
|
|
3746 n = XSTRING_LENGTH (lstr);
|
|
|
3747 }
|
|
|
3748 }
|
|
|
3749 else
|
|
|
3750 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3751 {
|
|
|
3752 encode_utf8 (charset, ch, c, dst);
|
|
|
3753 }
|
|
|
3754 ch = 0;
|
|
|
3755 }
|
|
|
3756 else
|
|
|
3757 {
|
|
|
3758 ch = c;
|
|
|
3759 char_boundary = 0;
|
|
|
3760 }
|
|
|
3761 break;
|
|
|
3762 case 4:
|
|
|
3763 if (ch)
|
|
|
3764 {
|
|
|
3765 encode_utf8 (charset, ch, c, dst);
|
|
|
3766 ch = 0;
|
|
|
3767 }
|
|
|
3768 else
|
|
|
3769 {
|
|
|
3770 ch = c;
|
|
|
3771 char_boundary = 0;
|
|
|
3772 }
|
|
|
3773 break;
|
|
|
3774 default:
|
|
|
3775 abort ();
|
|
|
3776 }
|
|
|
3777 }
|
|
|
3778 }
|
|
|
3779 }
|
|
|
3780
|
|
|
3781 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3782 if (in_composite)
|
|
|
3783 {
|
|
|
3784 n = saved_n;
|
|
|
3785 src = saved_src;
|
|
|
3786 in_composite = 0;
|
|
|
3787 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
3788 }
|
|
|
3789 #endif
|
|
|
3790
|
|
|
3791 str->flags = flags;
|
|
|
3792 str->ch = ch;
|
|
|
3793 str->iso2022.current_char_boundary = char_boundary;
|
|
|
3794 str->iso2022.current_charset = charset;
|
|
|
3795
|
|
|
3796 /* Verbum caro factum est! */
|
|
|
3797 }
|
|
|
3798
|
|
|
3799
|
|
|
3800 /************************************************************************/
|
|
259
|
3801 /* ISO2022 methods */
|
|
|
3802 /************************************************************************/
|
|
|
3803
|
|
|
3804 /* The following note describes the coding system ISO2022 briefly.
|
|
396
|
3805 Since the intention of this note is to help understand the
|
|
|
3806 functions in this file, some parts are NOT ACCURATE or OVERLY
|
|
259
|
3807 SIMPLIFIED. For thorough understanding, please refer to the
|
|
|
3808 original document of ISO2022.
|
|
|
3809
|
|
|
3810 ISO2022 provides many mechanisms to encode several character sets
|
|
396
|
3811 in 7-bit and 8-bit environments. For 7-bit environments, all text
|
|
|
3812 is encoded using bytes less than 128. This may make the encoded
|
|
|
3813 text a little bit longer, but the text passes more easily through
|
|
|
3814 several gateways, some of which strip off MSB (Most Signigant Bit).
|
|
|
3815
|
|
|
3816 There are two kinds of character sets: control character set and
|
|
259
|
3817 graphic character set. The former contains control characters such
|
|
|
3818 as `newline' and `escape' to provide control functions (control
|
|
396
|
3819 functions are also provided by escape sequences). The latter
|
|
259
|
3820 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
|
3821 two control character sets and many graphic character sets.
|
|
|
3822
|
|
396
|
3823 Graphic character sets are classified into one of the following
|
|
|
3824 four classes, according to the number of bytes (DIMENSION) and
|
|
|
3825 number of characters in one dimension (CHARS) of the set:
|
|
|
3826 - DIMENSION1_CHARS94
|
|
|
3827 - DIMENSION1_CHARS96
|
|
|
3828 - DIMENSION2_CHARS94
|
|
|
3829 - DIMENSION2_CHARS96
|
|
|
3830
|
|
|
3831 In addition, each character set is assigned an identification tag,
|
|
|
3832 unique for each set, called "final character" (denoted as <F>
|
|
|
3833 hereafter). The <F> of each character set is decided by ECMA(*)
|
|
|
3834 when it is registered in ISO. The code range of <F> is 0x30..0x7F
|
|
|
3835 (0x30..0x3F are for private use only).
|
|
259
|
3836
|
|
|
3837 Note (*): ECMA = European Computer Manufacturers Association
|
|
|
3838
|
|
|
3839 Here are examples of graphic character set [NAME(<F>)]:
|
|
396
|
3840 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
|
3841 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
|
|
|
3842 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
|
|
|
3843 o DIMENSION2_CHARS96 -- none for the moment
|
|
|
3844
|
|
|
3845 A code area (1 byte = 8 bits) is divided into 4 areas, C0, GL, C1, and GR.
|
|
259
|
3846 C0 [0x00..0x1F] -- control character plane 0
|
|
|
3847 GL [0x20..0x7F] -- graphic character plane 0
|
|
|
3848 C1 [0x80..0x9F] -- control character plane 1
|
|
|
3849 GR [0xA0..0xFF] -- graphic character plane 1
|
|
|
3850
|
|
|
3851 A control character set is directly designated and invoked to C0 or
|
|
|
3852 C1 by an escape sequence. The most common case is that:
|
|
|
3853 - ISO646's control character set is designated/invoked to C0, and
|
|
|
3854 - ISO6429's control character set is designated/invoked to C1,
|
|
|
3855 and usually these designations/invocations are omitted in encoded
|
|
|
3856 text. In a 7-bit environment, only C0 can be used, and a control
|
|
|
3857 character for C1 is encoded by an appropriate escape sequence to
|
|
|
3858 fit into the environment. All control characters for C1 are
|
|
|
3859 defined to have corresponding escape sequences.
|
|
|
3860
|
|
|
3861 A graphic character set is at first designated to one of four
|
|
|
3862 graphic registers (G0 through G3), then these graphic registers are
|
|
|
3863 invoked to GL or GR. These designations and invocations can be
|
|
|
3864 done independently. The most common case is that G0 is invoked to
|
|
|
3865 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
|
3866 these invocations and designations are omitted in encoded text.
|
|
|
3867 In a 7-bit environment, only GL can be used.
|
|
|
3868
|
|
396
|
3869 When a graphic character set of CHARS94 is invoked to GL, codes
|
|
|
3870 0x20 and 0x7F of the GL area work as control characters SPACE and
|
|
|
3871 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
|
|
|
3872 be used.
|
|
259
|
3873
|
|
|
3874 There are two ways of invocation: locking-shift and single-shift.
|
|
|
3875 With locking-shift, the invocation lasts until the next different
|
|
396
|
3876 invocation, whereas with single-shift, the invocation affects the
|
|
|
3877 following character only and doesn't affect the locking-shift
|
|
|
3878 state. Invocations are done by the following control characters or
|
|
|
3879 escape sequences:
|
|
259
|
3880
|
|
|
3881 ----------------------------------------------------------------------
|
|
|
3882 abbrev function cntrl escape seq description
|
|
|
3883 ----------------------------------------------------------------------
|
|
|
3884 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
|
3885 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
|
3886 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
|
3887 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
|
396
|
3888 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
|
|
|
3889 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
|
|
|
3890 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
|
|
259
|
3891 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
|
3892 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
|
3893 ----------------------------------------------------------------------
|
|
396
|
3894 (*) These are not used by any known coding system.
|
|
|
3895
|
|
|
3896 Control characters for these functions are defined by macros
|
|
|
3897 ISO_CODE_XXX in `coding.h'.
|
|
|
3898
|
|
|
3899 Designations are done by the following escape sequences:
|
|
259
|
3900 ----------------------------------------------------------------------
|
|
|
3901 escape sequence description
|
|
|
3902 ----------------------------------------------------------------------
|
|
396
|
3903 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
|
|
|
3904 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
|
|
|
3905 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
|
|
|
3906 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
|
|
|
3907 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
|
|
|
3908 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
|
|
|
3909 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
|
|
|
3910 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
|
|
|
3911 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
|
|
|
3912 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
|
|
|
3913 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
|
|
|
3914 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
|
|
|
3915 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
|
|
|
3916 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
|
|
|
3917 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
|
|
|
3918 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
|
|
259
|
3919 ----------------------------------------------------------------------
|
|
396
|
3920
|
|
|
3921 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
|
|
|
3922 of dimension 1, chars 94, and final character <F>, etc...
|
|
259
|
3923
|
|
|
3924 Note (*): Although these designations are not allowed in ISO2022,
|
|
|
3925 Emacs accepts them on decoding, and produces them on encoding
|
|
396
|
3926 CHARS96 character sets in a coding system which is characterized as
|
|
|
3927 7-bit environment, non-locking-shift, and non-single-shift.
|
|
259
|
3928
|
|
|
3929 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
|
396
|
3930 '(' can be omitted. We refer to this as "short-form" hereafter.
|
|
259
|
3931
|
|
|
3932 Now you may notice that there are a lot of ways for encoding the
|
|
|
3933 same multilingual text in ISO2022. Actually, there exist many
|
|
396
|
3934 coding systems such as Compound Text (used in X11's inter client
|
|
259
|
3935 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
|
3936 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
|
3937 localized platforms), and all of these are variants of ISO2022.
|
|
|
3938
|
|
|
3939 In addition to the above, Emacs handles two more kinds of escape
|
|
|
3940 sequences: ISO6429's direction specification and Emacs' private
|
|
|
3941 sequence for specifying character composition.
|
|
|
3942
|
|
396
|
3943 ISO6429's direction specification takes the following form:
|
|
259
|
3944 o CSI ']' -- end of the current direction
|
|
|
3945 o CSI '0' ']' -- end of the current direction
|
|
|
3946 o CSI '1' ']' -- start of left-to-right text
|
|
|
3947 o CSI '2' ']' -- start of right-to-left text
|
|
|
3948 The control character CSI (0x9B: control sequence introducer) is
|
|
396
|
3949 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
|
|
|
3950
|
|
|
3951 Character composition specification takes the following form:
|
|
259
|
3952 o ESC '0' -- start character composition
|
|
|
3953 o ESC '1' -- end character composition
|
|
396
|
3954 Since these are not standard escape sequences of any ISO standard,
|
|
|
3955 their use with these meanings is restricted to Emacs only. */
|
|
259
|
3956
|
|
|
3957 static void
|
|
|
3958 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
|
3959 {
|
|
|
3960 int i;
|
|
|
3961
|
|
|
3962 for (i = 0; i < 4; i++)
|
|
|
3963 {
|
|
|
3964 if (!NILP (coding_system))
|
|
|
3965 iso->charset[i] =
|
|
|
3966 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
|
3967 else
|
|
|
3968 iso->charset[i] = Qt;
|
|
|
3969 iso->invalid_designated[i] = 0;
|
|
|
3970 }
|
|
|
3971 iso->esc = ISO_ESC_NOTHING;
|
|
|
3972 iso->esc_bytes_index = 0;
|
|
|
3973 iso->register_left = 0;
|
|
|
3974 iso->register_right = 1;
|
|
|
3975 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3976 iso->invalid_switch_dir = 0;
|
|
|
3977 iso->output_direction_sequence = 0;
|
|
|
3978 iso->output_literally = 0;
|
|
396
|
3979 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
3980 if (iso->composite_chars)
|
|
|
3981 Dynarr_reset (iso->composite_chars);
|
|
396
|
3982 #endif
|
|
259
|
3983 }
|
|
|
3984
|
|
|
3985 static int
|
|
|
3986 fit_to_be_escape_quoted (unsigned char c)
|
|
|
3987 {
|
|
|
3988 switch (c)
|
|
|
3989 {
|
|
|
3990 case ISO_CODE_ESC:
|
|
|
3991 case ISO_CODE_CSI:
|
|
|
3992 case ISO_CODE_SS2:
|
|
|
3993 case ISO_CODE_SS3:
|
|
|
3994 case ISO_CODE_SO:
|
|
|
3995 case ISO_CODE_SI:
|
|
|
3996 return 1;
|
|
|
3997
|
|
|
3998 default:
|
|
|
3999 return 0;
|
|
|
4000 }
|
|
|
4001 }
|
|
|
4002
|
|
|
4003 /* Parse one byte of an ISO2022 escape sequence.
|
|
|
4004 If the result is an invalid escape sequence, return 0 and
|
|
|
4005 do not change anything in STR. Otherwise, if the result is
|
|
|
4006 an incomplete escape sequence, update ISO2022.ESC and
|
|
|
4007 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
|
4008 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
|
4009 return 1.
|
|
|
4010
|
|
|
4011 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
|
4012 or invocation of an invalid character set and treat that as
|
|
|
4013 an unrecognized escape sequence. */
|
|
|
4014
|
|
|
4015 static int
|
|
|
4016 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
|
4017 unsigned char c, unsigned int *flags,
|
|
|
4018 int check_invalid_charsets)
|
|
|
4019 {
|
|
|
4020 /* (1) If we're at the end of a designation sequence, CS is the
|
|
|
4021 charset being designated and REG is the register to designate
|
|
|
4022 it to.
|
|
|
4023
|
|
|
4024 (2) If we're at the end of a locking-shift sequence, REG is
|
|
|
4025 the register to invoke and HALF (0 == left, 1 == right) is
|
|
|
4026 the half to invoke it into.
|
|
|
4027
|
|
|
4028 (3) If we're at the end of a single-shift sequence, REG is
|
|
|
4029 the register to invoke. */
|
|
|
4030 Lisp_Object cs = Qnil;
|
|
|
4031 int reg, half;
|
|
|
4032
|
|
|
4033 /* NOTE: This code does goto's all over the fucking place.
|
|
|
4034 The reason for this is that we're basically implementing
|
|
|
4035 a state machine here, and hierarchical languages like C
|
|
|
4036 don't really provide a clean way of doing this. */
|
|
|
4037
|
|
|
4038 if (! (*flags & CODING_STATE_ESCAPE))
|
|
|
4039 /* At beginning of escape sequence; we need to reset our
|
|
|
4040 escape-state variables. */
|
|
|
4041 iso->esc = ISO_ESC_NOTHING;
|
|
|
4042
|
|
|
4043 iso->output_literally = 0;
|
|
|
4044 iso->output_direction_sequence = 0;
|
|
|
4045
|
|
|
4046 switch (iso->esc)
|
|
|
4047 {
|
|
|
4048 case ISO_ESC_NOTHING:
|
|
|
4049 iso->esc_bytes_index = 0;
|
|
|
4050 switch (c)
|
|
|
4051 {
|
|
|
4052 case ISO_CODE_ESC: /* Start escape sequence */
|
|
|
4053 *flags |= CODING_STATE_ESCAPE;
|
|
|
4054 iso->esc = ISO_ESC;
|
|
|
4055 goto not_done;
|
|
|
4056
|
|
|
4057 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
|
4058 *flags |= CODING_STATE_ESCAPE;
|
|
|
4059 iso->esc = ISO_ESC_5_11;
|
|
|
4060 goto not_done;
|
|
|
4061
|
|
|
4062 case ISO_CODE_SO: /* locking shift 1 */
|
|
|
4063 reg = 1; half = 0;
|
|
|
4064 goto locking_shift;
|
|
|
4065 case ISO_CODE_SI: /* locking shift 0 */
|
|
|
4066 reg = 0; half = 0;
|
|
|
4067 goto locking_shift;
|
|
|
4068
|
|
|
4069 case ISO_CODE_SS2: /* single shift */
|
|
|
4070 reg = 2;
|
|
|
4071 goto single_shift;
|
|
|
4072 case ISO_CODE_SS3: /* single shift */
|
|
|
4073 reg = 3;
|
|
|
4074 goto single_shift;
|
|
|
4075
|
|
|
4076 default: /* Other control characters */
|
|
|
4077 return 0;
|
|
|
4078 }
|
|
|
4079
|
|
|
4080 case ISO_ESC:
|
|
|
4081 switch (c)
|
|
|
4082 {
|
|
|
4083 /**** single shift ****/
|
|
|
4084
|
|
|
4085 case 'N': /* single shift 2 */
|
|
|
4086 reg = 2;
|
|
|
4087 goto single_shift;
|
|
|
4088 case 'O': /* single shift 3 */
|
|
|
4089 reg = 3;
|
|
|
4090 goto single_shift;
|
|
|
4091
|
|
|
4092 /**** locking shift ****/
|
|
|
4093
|
|
|
4094 case '~': /* locking shift 1 right */
|
|
|
4095 reg = 1; half = 1;
|
|
|
4096 goto locking_shift;
|
|
|
4097 case 'n': /* locking shift 2 */
|
|
|
4098 reg = 2; half = 0;
|
|
|
4099 goto locking_shift;
|
|
|
4100 case '}': /* locking shift 2 right */
|
|
|
4101 reg = 2; half = 1;
|
|
|
4102 goto locking_shift;
|
|
|
4103 case 'o': /* locking shift 3 */
|
|
|
4104 reg = 3; half = 0;
|
|
|
4105 goto locking_shift;
|
|
|
4106 case '|': /* locking shift 3 right */
|
|
|
4107 reg = 3; half = 1;
|
|
|
4108 goto locking_shift;
|
|
|
4109
|
|
396
|
4110 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4111 /**** composite ****/
|
|
|
4112
|
|
|
4113 case '0':
|
|
|
4114 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
|
4115 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
|
4116 CODING_STATE_COMPOSITE;
|
|
|
4117 return 1;
|
|
|
4118
|
|
|
4119 case '1':
|
|
|
4120 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
|
4121 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
|
4122 ~CODING_STATE_COMPOSITE;
|
|
|
4123 return 1;
|
|
396
|
4124 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
4125
|
|
|
4126 /**** directionality ****/
|
|
|
4127
|
|
|
4128 case '[':
|
|
|
4129 iso->esc = ISO_ESC_5_11;
|
|
|
4130 goto not_done;
|
|
|
4131
|
|
|
4132 /**** designation ****/
|
|
|
4133
|
|
|
4134 case '$': /* multibyte charset prefix */
|
|
|
4135 iso->esc = ISO_ESC_2_4;
|
|
|
4136 goto not_done;
|
|
|
4137
|
|
|
4138 default:
|
|
|
4139 if (0x28 <= c && c <= 0x2F)
|
|
|
4140 {
|
|
|
4141 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
|
|
|
4142 goto not_done;
|
|
|
4143 }
|
|
|
4144
|
|
|
4145 /* This function is called with CODESYS equal to nil when
|
|
|
4146 doing coding-system detection. */
|
|
|
4147 if (!NILP (codesys)
|
|
|
4148 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4149 && fit_to_be_escape_quoted (c))
|
|
|
4150 {
|
|
|
4151 iso->esc = ISO_ESC_LITERAL;
|
|
|
4152 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4153 return 1;
|
|
|
4154 }
|
|
|
4155
|
|
|
4156 /* bzzzt! */
|
|
|
4157 return 0;
|
|
|
4158 }
|
|
|
4159
|
|
|
4160
|
|
|
4161
|
|
|
4162 /**** directionality ****/
|
|
|
4163
|
|
|
4164 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
|
4165 if (c == ']')
|
|
|
4166 {
|
|
|
4167 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4168 goto directionality;
|
|
|
4169 }
|
|
|
4170 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
|
4171 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
|
4172 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
|
4173 else return 0;
|
|
|
4174 goto not_done;
|
|
|
4175
|
|
|
4176 case ISO_ESC_5_11_0:
|
|
|
4177 if (c == ']')
|
|
|
4178 {
|
|
|
4179 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4180 goto directionality;
|
|
|
4181 }
|
|
|
4182 return 0;
|
|
|
4183
|
|
|
4184 case ISO_ESC_5_11_1:
|
|
|
4185 if (c == ']')
|
|
|
4186 {
|
|
|
4187 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4188 goto directionality;
|
|
|
4189 }
|
|
|
4190 return 0;
|
|
|
4191
|
|
|
4192 case ISO_ESC_5_11_2:
|
|
|
4193 if (c == ']')
|
|
|
4194 {
|
|
|
4195 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
|
4196 goto directionality;
|
|
|
4197 }
|
|
|
4198 return 0;
|
|
|
4199
|
|
|
4200 directionality:
|
|
|
4201 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
|
4202 /* Various junk here to attempt to preserve the direction sequences
|
|
|
4203 literally in the text if they would otherwise be swallowed due
|
|
|
4204 to invalid designations that don't show up as actual charset
|
|
|
4205 changes in the text. */
|
|
|
4206 if (iso->invalid_switch_dir)
|
|
|
4207 {
|
|
|
4208 /* We already inserted a direction switch literally into the
|
|
|
4209 text. We assume (#### this may not be right) that the
|
|
|
4210 next direction switch is the one going the other way,
|
|
|
4211 and we need to output that literally as well. */
|
|
|
4212 iso->output_literally = 1;
|
|
|
4213 iso->invalid_switch_dir = 0;
|
|
|
4214 }
|
|
|
4215 else
|
|
|
4216 {
|
|
|
4217 int jj;
|
|
|
4218
|
|
|
4219 /* If we are in the thrall of an invalid designation,
|
|
|
4220 then stick the directionality sequence literally into the
|
|
|
4221 output stream so it ends up in the original text again. */
|
|
|
4222 for (jj = 0; jj < 4; jj++)
|
|
|
4223 if (iso->invalid_designated[jj])
|
|
|
4224 break;
|
|
|
4225 if (jj < 4)
|
|
|
4226 {
|
|
|
4227 iso->output_literally = 1;
|
|
|
4228 iso->invalid_switch_dir = 1;
|
|
|
4229 }
|
|
|
4230 else
|
|
|
4231 /* Indicate that we haven't yet seen a valid designation,
|
|
|
4232 so that if a switch-dir is directly followed by an
|
|
|
4233 invalid designation, both get inserted literally. */
|
|
|
4234 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
|
4235 }
|
|
|
4236 return 1;
|
|
|
4237
|
|
|
4238
|
|
|
4239 /**** designation ****/
|
|
|
4240
|
|
|
4241 case ISO_ESC_2_4:
|
|
|
4242 if (0x28 <= c && c <= 0x2F)
|
|
|
4243 {
|
|
|
4244 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
|
|
|
4245 goto not_done;
|
|
|
4246 }
|
|
|
4247 if (0x40 <= c && c <= 0x42)
|
|
|
4248 {
|
|
|
4249 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
|
4250 *flags & CODING_STATE_R2L ?
|
|
|
4251 CHARSET_RIGHT_TO_LEFT :
|
|
|
4252 CHARSET_LEFT_TO_RIGHT);
|
|
|
4253 reg = 0;
|
|
|
4254 goto designated;
|
|
|
4255 }
|
|
|
4256 return 0;
|
|
|
4257
|
|
|
4258 default:
|
|
|
4259 {
|
|
|
4260 int type =-1;
|
|
|
4261
|
|
|
4262 if (c < '0' || c > '~')
|
|
|
4263 return 0; /* bad final byte */
|
|
|
4264
|
|
|
4265 if (iso->esc >= ISO_ESC_2_8 &&
|
|
|
4266 iso->esc <= ISO_ESC_2_15)
|
|
|
4267 {
|
|
|
4268 type = ((iso->esc >= ISO_ESC_2_12) ?
|
|
|
4269 CHARSET_TYPE_96 : CHARSET_TYPE_94);
|
|
|
4270 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
|
4271 }
|
|
|
4272 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
|
4273 iso->esc <= ISO_ESC_2_4_15)
|
|
|
4274 {
|
|
|
4275 type = ((iso->esc >= ISO_ESC_2_4_12) ?
|
|
|
4276 CHARSET_TYPE_96X96 : CHARSET_TYPE_94X94);
|
|
|
4277 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
|
4278 }
|
|
|
4279 else
|
|
|
4280 {
|
|
|
4281 /* Can this ever be reached? -slb */
|
|
|
4282 abort();
|
|
|
4283 }
|
|
|
4284
|
|
|
4285 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
|
4286 *flags & CODING_STATE_R2L ?
|
|
|
4287 CHARSET_RIGHT_TO_LEFT :
|
|
|
4288 CHARSET_LEFT_TO_RIGHT);
|
|
|
4289 goto designated;
|
|
|
4290 }
|
|
|
4291 }
|
|
|
4292
|
|
|
4293 not_done:
|
|
|
4294 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
|
4295 return -1;
|
|
|
4296
|
|
|
4297 single_shift:
|
|
|
4298 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
|
4299 /* can't invoke something that ain't there. */
|
|
|
4300 return 0;
|
|
|
4301 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
|
4302 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4303 if (reg == 2)
|
|
|
4304 *flags |= CODING_STATE_SS2;
|
|
|
4305 else
|
|
|
4306 *flags |= CODING_STATE_SS3;
|
|
|
4307 return 1;
|
|
|
4308
|
|
|
4309 locking_shift:
|
|
|
4310 if (check_invalid_charsets &&
|
|
|
4311 !CHARSETP (iso->charset[reg]))
|
|
|
4312 /* can't invoke something that ain't there. */
|
|
|
4313 return 0;
|
|
|
4314 if (half)
|
|
|
4315 iso->register_right = reg;
|
|
|
4316 else
|
|
|
4317 iso->register_left = reg;
|
|
|
4318 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4319 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
|
4320 return 1;
|
|
|
4321
|
|
|
4322 designated:
|
|
|
4323 if (NILP (cs) && check_invalid_charsets)
|
|
|
4324 {
|
|
|
4325 iso->invalid_designated[reg] = 1;
|
|
|
4326 iso->charset[reg] = Vcharset_ascii;
|
|
|
4327 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4328 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4329 iso->output_literally = 1;
|
|
|
4330 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4331 {
|
|
|
4332 /* We encountered a switch-direction followed by an
|
|
|
4333 invalid designation. Ensure that the switch-direction
|
|
|
4334 gets outputted; otherwise it will probably get eaten
|
|
|
4335 when the text is written out again. */
|
|
|
4336 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4337 iso->output_direction_sequence = 1;
|
|
|
4338 /* And make sure that the switch-dir going the other
|
|
|
4339 way gets outputted, as well. */
|
|
|
4340 iso->invalid_switch_dir = 1;
|
|
|
4341 }
|
|
|
4342 return 1;
|
|
|
4343 }
|
|
|
4344 /* This function is called with CODESYS equal to nil when
|
|
|
4345 doing coding-system detection. */
|
|
|
4346 if (!NILP (codesys))
|
|
|
4347 {
|
|
|
4348 charset_conversion_spec_dynarr *dyn =
|
|
|
4349 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
|
4350
|
|
|
4351 if (dyn)
|
|
|
4352 {
|
|
|
4353 int i;
|
|
|
4354
|
|
|
4355 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4356 {
|
|
|
4357 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4358 if (EQ (cs, spec->from_charset))
|
|
|
4359 cs = spec->to_charset;
|
|
|
4360 }
|
|
|
4361 }
|
|
|
4362 }
|
|
|
4363
|
|
|
4364 iso->charset[reg] = cs;
|
|
|
4365 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4366 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4367 if (iso->invalid_designated[reg])
|
|
|
4368 {
|
|
|
4369 iso->invalid_designated[reg] = 0;
|
|
|
4370 iso->output_literally = 1;
|
|
|
4371 }
|
|
|
4372 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4373 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4374 return 1;
|
|
|
4375 }
|
|
|
4376
|
|
|
4377 static int
|
|
412
|
4378 detect_coding_iso2022 (struct detection_state *st, CONST unsigned char *src,
|
|
259
|
4379 unsigned int n)
|
|
|
4380 {
|
|
|
4381 int mask;
|
|
|
4382
|
|
|
4383 /* #### There are serious deficiencies in the recognition mechanism
|
|
388
|
4384 here. This needs to be much smarter if it's going to cut it.
|
|
|
4385 The sequence "\xff\x0f" is currently detected as LOCK_SHIFT while
|
|
|
4386 it should be detected as Latin-1.
|
|
|
4387 All the ISO2022 stuff in this file should be synced up with the
|
|
|
4388 code from FSF Emacs-20.4, in which Mule should be more or less stable.
|
|
|
4389 Perhaps we should wait till R2L works in FSF Emacs? */
|
|
259
|
4390
|
|
|
4391 if (!st->iso2022.initted)
|
|
|
4392 {
|
|
|
4393 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
|
4394 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
|
4395 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4396 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4397 CODING_CATEGORY_ISO_8_2_MASK |
|
|
|
4398 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
|
4399 st->iso2022.flags = 0;
|
|
|
4400 st->iso2022.high_byte_count = 0;
|
|
|
4401 st->iso2022.saw_single_shift = 0;
|
|
|
4402 st->iso2022.initted = 1;
|
|
|
4403 }
|
|
|
4404
|
|
|
4405 mask = st->iso2022.mask;
|
|
|
4406
|
|
|
4407 while (n--)
|
|
|
4408 {
|
|
388
|
4409 int c = *src++;
|
|
259
|
4410 if (c >= 0xA0)
|
|
|
4411 {
|
|
|
4412 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4413 st->iso2022.high_byte_count++;
|
|
|
4414 }
|
|
|
4415 else
|
|
|
4416 {
|
|
|
4417 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
|
4418 {
|
|
|
4419 if (st->iso2022.high_byte_count & 1)
|
|
|
4420 /* odd number of high bytes; assume not iso-8-2 */
|
|
|
4421 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4422 }
|
|
|
4423 st->iso2022.high_byte_count = 0;
|
|
|
4424 st->iso2022.saw_single_shift = 0;
|
|
|
4425 if (c > 0x80)
|
|
|
4426 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4427 }
|
|
|
4428 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
|
4429 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
|
4430 { /* control chars */
|
|
|
4431 switch (c)
|
|
|
4432 {
|
|
|
4433 /* Allow and ignore control characters that you might
|
|
|
4434 reasonably see in a text file */
|
|
|
4435 case '\r':
|
|
|
4436 case '\n':
|
|
|
4437 case '\t':
|
|
|
4438 case 7: /* bell */
|
|
|
4439 case 8: /* backspace */
|
|
|
4440 case 11: /* vertical tab */
|
|
|
4441 case 12: /* form feed */
|
|
|
4442 case 26: /* MS-DOS C-z junk */
|
|
|
4443 case 31: /* '^_' -- for info */
|
|
|
4444 goto label_continue_loop;
|
|
|
4445
|
|
|
4446 default:
|
|
|
4447 break;
|
|
|
4448 }
|
|
|
4449 }
|
|
|
4450
|
|
|
4451 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
|
4452 || BYTE_C1_P (c))
|
|
|
4453 {
|
|
|
4454 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
|
4455 &st->iso2022.flags, 0))
|
|
|
4456 {
|
|
|
4457 switch (st->iso2022.iso.esc)
|
|
|
4458 {
|
|
|
4459 case ISO_ESC_DESIGNATE:
|
|
|
4460 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
|
4461 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4462 break;
|
|
|
4463 case ISO_ESC_LOCKING_SHIFT:
|
|
|
4464 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
|
4465 goto ran_out_of_chars;
|
|
|
4466 case ISO_ESC_SINGLE_SHIFT:
|
|
|
4467 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
|
4468 st->iso2022.saw_single_shift = 1;
|
|
|
4469 break;
|
|
|
4470 default:
|
|
|
4471 break;
|
|
|
4472 }
|
|
|
4473 }
|
|
|
4474 else
|
|
|
4475 {
|
|
|
4476 mask = 0;
|
|
|
4477 goto ran_out_of_chars;
|
|
|
4478 }
|
|
|
4479 }
|
|
|
4480 label_continue_loop:;
|
|
|
4481 }
|
|
|
4482
|
|
|
4483 ran_out_of_chars:
|
|
|
4484
|
|
|
4485 return mask;
|
|
|
4486 }
|
|
|
4487
|
|
|
4488 static int
|
|
|
4489 postprocess_iso2022_mask (int mask)
|
|
|
4490 {
|
|
|
4491 /* #### kind of cheesy */
|
|
|
4492 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
|
4493 entirely seven-bit and turn off the eight-bit ones. */
|
|
|
4494 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
|
4495 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4496 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4497 CODING_CATEGORY_ISO_8_2_MASK);
|
|
|
4498 return mask;
|
|
|
4499 }
|
|
|
4500
|
|
|
4501 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
|
4502 output a switch-dir-to-left-to-right sequence to DST.
|
|
|
4503 Also update FLAGS if it is not a null pointer.
|
|
|
4504 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4505 need to handle the CSI differently. */
|
|
|
4506
|
|
|
4507 static void
|
|
396
|
4508 restore_left_to_right_direction (Lisp_Coding_System *codesys,
|
|
259
|
4509 unsigned_char_dynarr *dst,
|
|
|
4510 unsigned int *flags,
|
|
|
4511 int internal_p)
|
|
|
4512 {
|
|
|
4513 if (!flags || (*flags & CODING_STATE_R2L))
|
|
|
4514 {
|
|
|
4515 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4516 {
|
|
|
4517 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4518 Dynarr_add (dst, '[');
|
|
|
4519 }
|
|
|
4520 else if (internal_p)
|
|
|
4521 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4522 else
|
|
|
4523 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4524 Dynarr_add (dst, '0');
|
|
|
4525 Dynarr_add (dst, ']');
|
|
|
4526 if (flags)
|
|
|
4527 *flags &= ~CODING_STATE_R2L;
|
|
|
4528 }
|
|
|
4529 }
|
|
|
4530
|
|
|
4531 /* If FLAGS is a null pointer or specifies a direction different from
|
|
|
4532 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
|
4533 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
|
4534 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
|
4535 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4536 need to handle the CSI differently. */
|
|
|
4537
|
|
|
4538 static void
|
|
396
|
4539 ensure_correct_direction (int direction, Lisp_Coding_System *codesys,
|
|
259
|
4540 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
|
4541 int internal_p)
|
|
|
4542 {
|
|
|
4543 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
|
4544 direction == CHARSET_LEFT_TO_RIGHT)
|
|
|
4545 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
|
4546 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
|
4547 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
|
4548 direction == CHARSET_RIGHT_TO_LEFT)
|
|
|
4549 {
|
|
|
4550 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4551 {
|
|
|
4552 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4553 Dynarr_add (dst, '[');
|
|
|
4554 }
|
|
|
4555 else if (internal_p)
|
|
|
4556 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4557 else
|
|
|
4558 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4559 Dynarr_add (dst, '2');
|
|
|
4560 Dynarr_add (dst, ']');
|
|
|
4561 if (flags)
|
|
|
4562 *flags |= CODING_STATE_R2L;
|
|
|
4563 }
|
|
|
4564 }
|
|
|
4565
|
|
|
4566 /* Convert ISO2022-format data to internal format. */
|
|
|
4567
|
|
|
4568 static void
|
|
412
|
4569 decode_coding_iso2022 (Lstream *decoding, CONST unsigned char *src,
|
|
259
|
4570 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4571 {
|
|
|
4572 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
4573 unsigned int flags = str->flags;
|
|
|
4574 unsigned int ch = str->ch;
|
|
|
4575 eol_type_t eol_type = str->eol_type;
|
|
|
4576 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4577 unsigned_char_dynarr *real_dst = dst;
|
|
396
|
4578 #endif
|
|
|
4579 Lisp_Object coding_system;
|
|
|
4580
|
|
259
|
4581 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
4582
|
|
396
|
4583 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4584 if (flags & CODING_STATE_COMPOSITE)
|
|
|
4585 dst = str->iso2022.composite_chars;
|
|
396
|
4586 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
4587
|
|
|
4588 while (n--)
|
|
|
4589 {
|
|
388
|
4590 unsigned char c = *src++;
|
|
259
|
4591 if (flags & CODING_STATE_ESCAPE)
|
|
|
4592 { /* Within ESC sequence */
|
|
|
4593 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
|
4594 c, &flags, 1);
|
|
|
4595
|
|
|
4596 if (retval)
|
|
|
4597 {
|
|
|
4598 switch (str->iso2022.esc)
|
|
|
4599 {
|
|
396
|
4600 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4601 case ISO_ESC_START_COMPOSITE:
|
|
|
4602 if (str->iso2022.composite_chars)
|
|
|
4603 Dynarr_reset (str->iso2022.composite_chars);
|
|
|
4604 else
|
|
|
4605 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
|
|
|
4606 dst = str->iso2022.composite_chars;
|
|
|
4607 break;
|
|
|
4608 case ISO_ESC_END_COMPOSITE:
|
|
|
4609 {
|
|
|
4610 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
|
4611 Bytecount len;
|
|
|
4612 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
|
4613 Dynarr_length (dst));
|
|
|
4614 dst = real_dst;
|
|
|
4615 len = set_charptr_emchar (comstr, emch);
|
|
|
4616 Dynarr_add_many (dst, comstr, len);
|
|
|
4617 break;
|
|
|
4618 }
|
|
396
|
4619 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
4620
|
|
|
4621 case ISO_ESC_LITERAL:
|
|
|
4622 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4623 break;
|
|
|
4624
|
|
|
4625 default:
|
|
|
4626 /* Everything else handled already */
|
|
|
4627 break;
|
|
|
4628 }
|
|
|
4629 }
|
|
|
4630
|
|
|
4631 /* Attempted error recovery. */
|
|
|
4632 if (str->iso2022.output_direction_sequence)
|
|
|
4633 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
|
4634 CHARSET_RIGHT_TO_LEFT :
|
|
|
4635 CHARSET_LEFT_TO_RIGHT,
|
|
|
4636 str->codesys, dst, 0, 1);
|
|
|
4637 /* More error recovery. */
|
|
|
4638 if (!retval || str->iso2022.output_literally)
|
|
|
4639 {
|
|
|
4640 /* Output the (possibly invalid) sequence */
|
|
|
4641 int i;
|
|
|
4642 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
|
4643 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
|
4644 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4645 if (!retval)
|
|
|
4646 n++, src--;/* Repeat the loop with the same character. */
|
|
|
4647 else
|
|
|
4648 {
|
|
|
4649 /* No sense in reprocessing the final byte of the
|
|
|
4650 escape sequence; it could mess things up anyway.
|
|
|
4651 Just add it now. */
|
|
|
4652 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4653 }
|
|
|
4654 }
|
|
|
4655 ch = 0;
|
|
|
4656 }
|
|
|
4657 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
|
4658 { /* Control characters */
|
|
|
4659
|
|
|
4660 /***** Error-handling *****/
|
|
|
4661
|
|
|
4662 /* If we were in the middle of a character, dump out the
|
|
|
4663 partial character. */
|
|
|
4664 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4665
|
|
|
4666 /* If we just saw a single-shift character, dump it out.
|
|
|
4667 This may dump out the wrong sort of single-shift character,
|
|
|
4668 but least it will give an indication that something went
|
|
|
4669 wrong. */
|
|
|
4670 if (flags & CODING_STATE_SS2)
|
|
|
4671 {
|
|
|
4672 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
|
4673 flags &= ~CODING_STATE_SS2;
|
|
|
4674 }
|
|
|
4675 if (flags & CODING_STATE_SS3)
|
|
|
4676 {
|
|
|
4677 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
|
4678 flags &= ~CODING_STATE_SS3;
|
|
|
4679 }
|
|
|
4680
|
|
|
4681 /***** Now handle the control characters. *****/
|
|
|
4682
|
|
|
4683 /* Handle CR/LF */
|
|
|
4684 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4685
|
|
|
4686 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4687
|
|
|
4688 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
|
4689 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4690 }
|
|
|
4691 else
|
|
|
4692 { /* Graphic characters */
|
|
|
4693 Lisp_Object charset;
|
|
|
4694 int lb;
|
|
|
4695 int reg;
|
|
|
4696
|
|
|
4697 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4698
|
|
|
4699 /* Now determine the charset. */
|
|
|
4700 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
|
4701 : (flags & CODING_STATE_SS3) ? 3
|
|
|
4702 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
|
4703 : str->iso2022.register_left);
|
|
|
4704 charset = str->iso2022.charset[reg];
|
|
|
4705
|
|
|
4706 /* Error checking: */
|
|
388
|
4707 if (! CHARSETP (charset)
|
|
|
4708 || str->iso2022.invalid_designated[reg]
|
|
259
|
4709 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
|
4710 && XCHARSET_CHARS (charset) == 94))
|
|
|
4711 /* Mrmph. We are trying to invoke a register that has no
|
|
|
4712 or an invalid charset in it, or trying to add a character
|
|
|
4713 outside the range of the charset. Insert that char literally
|
|
|
4714 to preserve it for the output. */
|
|
|
4715 {
|
|
|
4716 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4717 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4718 }
|
|
|
4719
|
|
|
4720 else
|
|
|
4721 {
|
|
|
4722 /* Things are probably hunky-dorey. */
|
|
|
4723
|
|
|
4724 /* Fetch reverse charset, maybe. */
|
|
|
4725 if (((flags & CODING_STATE_R2L) &&
|
|
|
4726 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
|
4727 ||
|
|
|
4728 (!(flags & CODING_STATE_R2L) &&
|
|
|
4729 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
|
4730 {
|
|
|
4731 Lisp_Object new_charset =
|
|
|
4732 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
|
4733 if (!NILP (new_charset))
|
|
|
4734 charset = new_charset;
|
|
|
4735 }
|
|
|
4736
|
|
|
4737 lb = XCHARSET_LEADING_BYTE (charset);
|
|
|
4738 switch (XCHARSET_REP_BYTES (charset))
|
|
|
4739 {
|
|
|
4740 case 1: /* ASCII */
|
|
|
4741 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4742 Dynarr_add (dst, c & 0x7F);
|
|
|
4743 break;
|
|
|
4744
|
|
|
4745 case 2: /* one-byte official */
|
|
|
4746 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4747 Dynarr_add (dst, lb);
|
|
|
4748 Dynarr_add (dst, c | 0x80);
|
|
|
4749 break;
|
|
|
4750
|
|
|
4751 case 3: /* one-byte private or two-byte official */
|
|
|
4752 if (XCHARSET_PRIVATE_P (charset))
|
|
|
4753 {
|
|
|
4754 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4755 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
|
4756 Dynarr_add (dst, lb);
|
|
|
4757 Dynarr_add (dst, c | 0x80);
|
|
|
4758 }
|
|
|
4759 else
|
|
|
4760 {
|
|
|
4761 if (ch)
|
|
|
4762 {
|
|
|
4763 Dynarr_add (dst, lb);
|
|
|
4764 Dynarr_add (dst, ch | 0x80);
|
|
|
4765 Dynarr_add (dst, c | 0x80);
|
|
|
4766 ch = 0;
|
|
|
4767 }
|
|
|
4768 else
|
|
|
4769 ch = c;
|
|
|
4770 }
|
|
|
4771 break;
|
|
|
4772
|
|
|
4773 default: /* two-byte private */
|
|
|
4774 if (ch)
|
|
|
4775 {
|
|
|
4776 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
|
4777 Dynarr_add (dst, lb);
|
|
|
4778 Dynarr_add (dst, ch | 0x80);
|
|
|
4779 Dynarr_add (dst, c | 0x80);
|
|
|
4780 ch = 0;
|
|
|
4781 }
|
|
|
4782 else
|
|
|
4783 ch = c;
|
|
|
4784 }
|
|
|
4785 }
|
|
|
4786
|
|
|
4787 if (!ch)
|
|
|
4788 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4789 }
|
|
|
4790
|
|
|
4791 label_continue_loop:;
|
|
|
4792 }
|
|
|
4793
|
|
|
4794 if (flags & CODING_STATE_END)
|
|
|
4795 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4796
|
|
396
|
4797 str->flags = flags;
|
|
|
4798 str->ch = ch;
|
|
259
|
4799 }
|
|
|
4800
|
|
|
4801
|
|
|
4802 /***** ISO2022 encoder *****/
|
|
|
4803
|
|
|
4804 /* Designate CHARSET into register REG. */
|
|
|
4805
|
|
|
4806 static void
|
|
|
4807 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
|
4808 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4809 {
|
|
412
|
4810 static CONST char inter94[] = "()*+";
|
|
|
4811 static CONST char inter96[] = ",-./";
|
|
272
|
4812 unsigned int type;
|
|
259
|
4813 unsigned char final;
|
|
|
4814 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
|
4815
|
|
|
4816 str->iso2022.charset[reg] = charset;
|
|
|
4817 if (!CHARSETP (charset))
|
|
|
4818 /* charset might be an initial nil or t. */
|
|
|
4819 return;
|
|
|
4820 type = XCHARSET_TYPE (charset);
|
|
|
4821 final = XCHARSET_FINAL (charset);
|
|
|
4822 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
|
4823 CHARSETP (old_charset) &&
|
|
|
4824 XCHARSET_TYPE (old_charset) == type &&
|
|
|
4825 XCHARSET_FINAL (old_charset) == final)
|
|
|
4826 return;
|
|
|
4827
|
|
|
4828 str->iso2022.force_charset_on_output[reg] = 0;
|
|
|
4829
|
|
|
4830 {
|
|
|
4831 charset_conversion_spec_dynarr *dyn =
|
|
|
4832 str->codesys->iso2022.output_conv;
|
|
|
4833
|
|
|
4834 if (dyn)
|
|
|
4835 {
|
|
|
4836 int i;
|
|
|
4837
|
|
|
4838 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4839 {
|
|
|
4840 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4841 if (EQ (charset, spec->from_charset))
|
|
|
4842 charset = spec->to_charset;
|
|
|
4843 }
|
|
|
4844 }
|
|
|
4845 }
|
|
|
4846
|
|
|
4847 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4848 switch (type)
|
|
|
4849 {
|
|
|
4850 case CHARSET_TYPE_94:
|
|
|
4851 Dynarr_add (dst, inter94[reg]);
|
|
|
4852 break;
|
|
|
4853 case CHARSET_TYPE_96:
|
|
|
4854 Dynarr_add (dst, inter96[reg]);
|
|
|
4855 break;
|
|
|
4856 case CHARSET_TYPE_94X94:
|
|
|
4857 Dynarr_add (dst, '$');
|
|
|
4858 if (reg != 0
|
|
|
4859 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
|
4860 || final < '@'
|
|
|
4861 || final > 'B')
|
|
|
4862 Dynarr_add (dst, inter94[reg]);
|
|
|
4863 break;
|
|
|
4864 case CHARSET_TYPE_96X96:
|
|
|
4865 Dynarr_add (dst, '$');
|
|
|
4866 Dynarr_add (dst, inter96[reg]);
|
|
|
4867 break;
|
|
|
4868 }
|
|
|
4869 Dynarr_add (dst, final);
|
|
|
4870 }
|
|
|
4871
|
|
|
4872 static void
|
|
|
4873 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4874 {
|
|
|
4875 if (str->iso2022.register_left != 0)
|
|
|
4876 {
|
|
|
4877 Dynarr_add (dst, ISO_CODE_SI);
|
|
|
4878 str->iso2022.register_left = 0;
|
|
|
4879 }
|
|
|
4880 }
|
|
|
4881
|
|
|
4882 static void
|
|
|
4883 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4884 {
|
|
|
4885 if (str->iso2022.register_left != 1)
|
|
|
4886 {
|
|
|
4887 Dynarr_add (dst, ISO_CODE_SO);
|
|
|
4888 str->iso2022.register_left = 1;
|
|
|
4889 }
|
|
|
4890 }
|
|
|
4891
|
|
|
4892 /* Convert internally-formatted data to ISO2022 format. */
|
|
|
4893
|
|
|
4894 static void
|
|
412
|
4895 encode_coding_iso2022 (Lstream *encoding, CONST unsigned char *src,
|
|
259
|
4896 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4897 {
|
|
|
4898 unsigned char charmask, c;
|
|
|
4899 unsigned char char_boundary;
|
|
|
4900 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
4901 unsigned int flags = str->flags;
|
|
|
4902 unsigned int ch = str->ch;
|
|
|
4903 Lisp_Coding_System *codesys = str->codesys;
|
|
|
4904 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
4905 int i;
|
|
|
4906 Lisp_Object charset;
|
|
|
4907 int half;
|
|
|
4908
|
|
396
|
4909 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4910 /* flags for handling composite chars. We do a little switcharoo
|
|
|
4911 on the source while we're outputting the composite char. */
|
|
|
4912 unsigned int saved_n = 0;
|
|
412
|
4913 CONST unsigned char *saved_src = NULL;
|
|
259
|
4914 int in_composite = 0;
|
|
396
|
4915 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4916
|
|
259
|
4917 char_boundary = str->iso2022.current_char_boundary;
|
|
|
4918 charset = str->iso2022.current_charset;
|
|
|
4919 half = str->iso2022.current_half;
|
|
|
4920
|
|
396
|
4921 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4922 back_to_square_n:
|
|
396
|
4923 #endif
|
|
259
|
4924 while (n--)
|
|
|
4925 {
|
|
|
4926 c = *src++;
|
|
|
4927
|
|
|
4928 if (BYTE_ASCII_P (c))
|
|
|
4929 { /* Processing ASCII character */
|
|
|
4930 ch = 0;
|
|
|
4931
|
|
|
4932 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4933
|
|
|
4934 /* Make sure G0 contains ASCII */
|
|
|
4935 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
|
4936 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
|
4937 {
|
|
|
4938 ensure_normal_shift (str, dst);
|
|
|
4939 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
|
4940 }
|
|
|
4941
|
|
|
4942 /* If necessary, restore everything to the default state
|
|
|
4943 at end-of-line */
|
|
|
4944 if (c == '\n' &&
|
|
|
4945 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
|
4946 {
|
|
|
4947 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4948
|
|
|
4949 ensure_normal_shift (str, dst);
|
|
|
4950
|
|
|
4951 for (i = 0; i < 4; i++)
|
|
|
4952 {
|
|
|
4953 Lisp_Object initial_charset =
|
|
|
4954 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
4955 iso2022_designate (initial_charset, i, str, dst);
|
|
|
4956 }
|
|
|
4957 }
|
|
|
4958 if (c == '\n')
|
|
|
4959 {
|
|
|
4960 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
4961 Dynarr_add (dst, '\r');
|
|
|
4962 if (eol_type != EOL_CR)
|
|
|
4963 Dynarr_add (dst, c);
|
|
|
4964 }
|
|
|
4965 else
|
|
|
4966 {
|
|
|
4967 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4968 && fit_to_be_escape_quoted (c))
|
|
|
4969 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4970 Dynarr_add (dst, c);
|
|
|
4971 }
|
|
|
4972 char_boundary = 1;
|
|
|
4973 }
|
|
|
4974
|
|
|
4975 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
4976 { /* Processing Leading Byte */
|
|
|
4977 ch = 0;
|
|
|
4978 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
4979 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
4980 ch = c;
|
|
|
4981 else if (!EQ (charset, Vcharset_control_1)
|
|
396
|
4982 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4983 && !EQ (charset, Vcharset_composite)
|
|
|
4984 #endif
|
|
|
4985 )
|
|
259
|
4986 {
|
|
|
4987 int reg;
|
|
|
4988
|
|
|
4989 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
|
4990 codesys, dst, &flags, 0);
|
|
|
4991
|
|
|
4992 /* Now determine which register to use. */
|
|
|
4993 reg = -1;
|
|
|
4994 for (i = 0; i < 4; i++)
|
|
|
4995 {
|
|
|
4996 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
|
4997 EQ (charset,
|
|
|
4998 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
|
4999 {
|
|
|
5000 reg = i;
|
|
|
5001 break;
|
|
|
5002 }
|
|
|
5003 }
|
|
|
5004
|
|
|
5005 if (reg == -1)
|
|
|
5006 {
|
|
|
5007 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
|
5008 {
|
|
|
5009 if (!NILP (str->iso2022.charset[1]) &&
|
|
|
5010 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
|
5011 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
|
5012 reg = 1;
|
|
|
5013 else if (!NILP (str->iso2022.charset[2]))
|
|
|
5014 reg = 2;
|
|
|
5015 else if (!NILP (str->iso2022.charset[3]))
|
|
|
5016 reg = 3;
|
|
|
5017 else
|
|
|
5018 reg = 0;
|
|
|
5019 }
|
|
|
5020 else
|
|
|
5021 reg = 0;
|
|
|
5022 }
|
|
|
5023
|
|
|
5024 iso2022_designate (charset, reg, str, dst);
|
|
|
5025
|
|
|
5026 /* Now invoke that register. */
|
|
|
5027 switch (reg)
|
|
|
5028 {
|
|
|
5029 case 0:
|
|
|
5030 ensure_normal_shift (str, dst);
|
|
|
5031 half = 0;
|
|
|
5032 break;
|
|
|
5033
|
|
|
5034 case 1:
|
|
|
5035 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
5036 {
|
|
|
5037 ensure_shift_out (str, dst);
|
|
|
5038 half = 0;
|
|
|
5039 }
|
|
|
5040 else
|
|
|
5041 half = 1;
|
|
|
5042 break;
|
|
|
5043
|
|
|
5044 case 2:
|
|
|
5045 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5046 {
|
|
|
5047 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5048 Dynarr_add (dst, 'N');
|
|
|
5049 half = 0;
|
|
|
5050 }
|
|
|
5051 else
|
|
|
5052 {
|
|
|
5053 Dynarr_add (dst, ISO_CODE_SS2);
|
|
|
5054 half = 1;
|
|
|
5055 }
|
|
|
5056 break;
|
|
|
5057
|
|
|
5058 case 3:
|
|
|
5059 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5060 {
|
|
|
5061 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5062 Dynarr_add (dst, 'O');
|
|
|
5063 half = 0;
|
|
|
5064 }
|
|
|
5065 else
|
|
|
5066 {
|
|
|
5067 Dynarr_add (dst, ISO_CODE_SS3);
|
|
|
5068 half = 1;
|
|
|
5069 }
|
|
|
5070 break;
|
|
|
5071
|
|
|
5072 default:
|
|
|
5073 abort ();
|
|
|
5074 }
|
|
|
5075 }
|
|
|
5076 char_boundary = 0;
|
|
|
5077 }
|
|
|
5078 else
|
|
|
5079 { /* Processing Non-ASCII character */
|
|
|
5080 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
|
5081 char_boundary = 1;
|
|
|
5082 if (EQ (charset, Vcharset_control_1))
|
|
|
5083 {
|
|
|
5084 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
5085 && fit_to_be_escape_quoted (c))
|
|
|
5086 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5087 /* you asked for it ... */
|
|
|
5088 Dynarr_add (dst, c - 0x20);
|
|
|
5089 }
|
|
|
5090 else
|
|
|
5091 {
|
|
|
5092 switch (XCHARSET_REP_BYTES (charset))
|
|
|
5093 {
|
|
|
5094 case 2:
|
|
|
5095 Dynarr_add (dst, c & charmask);
|
|
|
5096 break;
|
|
|
5097 case 3:
|
|
|
5098 if (XCHARSET_PRIVATE_P (charset))
|
|
|
5099 {
|
|
|
5100 Dynarr_add (dst, c & charmask);
|
|
|
5101 ch = 0;
|
|
|
5102 }
|
|
|
5103 else if (ch)
|
|
|
5104 {
|
|
396
|
5105 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
5106 if (EQ (charset, Vcharset_composite))
|
|
|
5107 {
|
|
|
5108 if (in_composite)
|
|
|
5109 {
|
|
|
5110 /* #### Bother! We don't know how to
|
|
|
5111 handle this yet. */
|
|
|
5112 Dynarr_add (dst, '~');
|
|
|
5113 }
|
|
|
5114 else
|
|
|
5115 {
|
|
|
5116 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
5117 ch & 0x7F, c & 0x7F);
|
|
|
5118 Lisp_Object lstr = composite_char_string (emch);
|
|
|
5119 saved_n = n;
|
|
|
5120 saved_src = src;
|
|
|
5121 in_composite = 1;
|
|
|
5122 src = XSTRING_DATA (lstr);
|
|
|
5123 n = XSTRING_LENGTH (lstr);
|
|
|
5124 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5125 Dynarr_add (dst, '0'); /* start composing */
|
|
|
5126 }
|
|
|
5127 }
|
|
|
5128 else
|
|
396
|
5129 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
5130 {
|
|
|
5131 Dynarr_add (dst, ch & charmask);
|
|
|
5132 Dynarr_add (dst, c & charmask);
|
|
|
5133 }
|
|
|
5134 ch = 0;
|
|
|
5135 }
|
|
|
5136 else
|
|
|
5137 {
|
|
|
5138 ch = c;
|
|
|
5139 char_boundary = 0;
|
|
|
5140 }
|
|
|
5141 break;
|
|
|
5142 case 4:
|
|
|
5143 if (ch)
|
|
|
5144 {
|
|
|
5145 Dynarr_add (dst, ch & charmask);
|
|
|
5146 Dynarr_add (dst, c & charmask);
|
|
|
5147 ch = 0;
|
|
|
5148 }
|
|
|
5149 else
|
|
|
5150 {
|
|
|
5151 ch = c;
|
|
|
5152 char_boundary = 0;
|
|
|
5153 }
|
|
|
5154 break;
|
|
|
5155 default:
|
|
|
5156 abort ();
|
|
|
5157 }
|
|
|
5158 }
|
|
|
5159 }
|
|
|
5160 }
|
|
|
5161
|
|
396
|
5162 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
5163 if (in_composite)
|
|
|
5164 {
|
|
|
5165 n = saved_n;
|
|
|
5166 src = saved_src;
|
|
|
5167 in_composite = 0;
|
|
|
5168 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5169 Dynarr_add (dst, '1'); /* end composing */
|
|
|
5170 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
5171 }
|
|
396
|
5172 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
5173
|
|
|
5174 if (char_boundary && flags & CODING_STATE_END)
|
|
|
5175 {
|
|
|
5176 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5177 ensure_normal_shift (str, dst);
|
|
|
5178 for (i = 0; i < 4; i++)
|
|
|
5179 {
|
|
|
5180 Lisp_Object initial_charset =
|
|
|
5181 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
5182 iso2022_designate (initial_charset, i, str, dst);
|
|
|
5183 }
|
|
|
5184 }
|
|
|
5185
|
|
396
|
5186 str->flags = flags;
|
|
|
5187 str->ch = ch;
|
|
259
|
5188 str->iso2022.current_char_boundary = char_boundary;
|
|
|
5189 str->iso2022.current_charset = charset;
|
|
|
5190 str->iso2022.current_half = half;
|
|
|
5191
|
|
|
5192 /* Verbum caro factum est! */
|
|
|
5193 }
|
|
|
5194 #endif /* MULE */
|
|
|
5195
|
|
|
5196 /************************************************************************/
|
|
|
5197 /* No-conversion methods */
|
|
|
5198 /************************************************************************/
|
|
|
5199
|
|
|
5200 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
5201 contain all 256 possible byte values and that are not to be
|
|
|
5202 interpreted as being in any particular decoding. */
|
|
|
5203 static void
|
|
412
|
5204 decode_coding_no_conversion (Lstream *decoding, CONST unsigned char *src,
|
|
259
|
5205 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5206 {
|
|
|
5207 unsigned char c;
|
|
|
5208 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
5209 unsigned int flags = str->flags;
|
|
|
5210 unsigned int ch = str->ch;
|
|
|
5211 eol_type_t eol_type = str->eol_type;
|
|
259
|
5212
|
|
|
5213 while (n--)
|
|
|
5214 {
|
|
|
5215 c = *src++;
|
|
|
5216
|
|
|
5217 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
5218 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
5219 label_continue_loop:;
|
|
|
5220 }
|
|
|
5221
|
|
|
5222 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
5223
|
|
396
|
5224 str->flags = flags;
|
|
|
5225 str->ch = ch;
|
|
259
|
5226 }
|
|
|
5227
|
|
|
5228 static void
|
|
412
|
5229 encode_coding_no_conversion (Lstream *encoding, CONST unsigned char *src,
|
|
259
|
5230 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5231 {
|
|
|
5232 unsigned char c;
|
|
|
5233 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
5234 unsigned int flags = str->flags;
|
|
|
5235 unsigned int ch = str->ch;
|
|
|
5236 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
5237
|
|
|
5238 while (n--)
|
|
|
5239 {
|
|
|
5240 c = *src++;
|
|
|
5241 if (c == '\n')
|
|
|
5242 {
|
|
|
5243 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
5244 Dynarr_add (dst, '\r');
|
|
|
5245 if (eol_type != EOL_CR)
|
|
|
5246 Dynarr_add (dst, '\n');
|
|
|
5247 ch = 0;
|
|
|
5248 }
|
|
|
5249 else if (BYTE_ASCII_P (c))
|
|
|
5250 {
|
|
|
5251 assert (ch == 0);
|
|
|
5252 Dynarr_add (dst, c);
|
|
|
5253 }
|
|
|
5254 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
5255 {
|
|
|
5256 assert (ch == 0);
|
|
|
5257 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
5258 c == LEADING_BYTE_CONTROL_1)
|
|
|
5259 ch = c;
|
|
|
5260 else
|
|
|
5261 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
5262 }
|
|
|
5263 else
|
|
|
5264 {
|
|
|
5265 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
|
5266 Dynarr_add (dst, c);
|
|
|
5267 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
5268 {
|
|
|
5269 assert (c < 0xC0);
|
|
|
5270 Dynarr_add (dst, c - 0x20);
|
|
|
5271 }
|
|
|
5272 /* else it should be the second or third byte of an
|
|
|
5273 untranslatable character, so ignore it */
|
|
|
5274 ch = 0;
|
|
|
5275 }
|
|
|
5276 }
|
|
|
5277
|
|
396
|
5278 str->flags = flags;
|
|
|
5279 str->ch = ch;
|
|
259
|
5280 }
|
|
|
5281
|
|
|
5282
|
|
412
|
5283 /************************************************************************/
|
|
|
5284 /* Simple internal/external functions */
|
|
|
5285 /************************************************************************/
|
|
|
5286
|
|
|
5287 static Extbyte_dynarr *conversion_out_dynarr;
|
|
|
5288 static Bufbyte_dynarr *conversion_in_dynarr;
|
|
|
5289
|
|
|
5290 /* Determine coding system from coding format */
|
|
|
5291
|
|
|
5292 /* #### not correct for all values of `fmt'! */
|
|
|
5293 static Lisp_Object
|
|
|
5294 external_data_format_to_coding_system (enum external_data_format fmt)
|
|
|
5295 {
|
|
|
5296 switch (fmt)
|
|
|
5297 {
|
|
|
5298 case FORMAT_FILENAME:
|
|
|
5299 case FORMAT_TERMINAL:
|
|
|
5300 if (EQ (Vfile_name_coding_system, Qnil) ||
|
|
|
5301 EQ (Vfile_name_coding_system, Qbinary))
|
|
|
5302 return Qnil;
|
|
|
5303 else
|
|
|
5304 return Fget_coding_system (Vfile_name_coding_system);
|
|
|
5305 #ifdef MULE
|
|
|
5306 case FORMAT_CTEXT:
|
|
|
5307 return Fget_coding_system (Qctext);
|
|
|
5308 #endif
|
|
|
5309 default:
|
|
|
5310 return Qnil;
|
|
|
5311 }
|
|
|
5312 }
|
|
|
5313
|
|
|
5314 Extbyte *
|
|
|
5315 convert_to_external_format (CONST Bufbyte *ptr,
|
|
|
5316 Bytecount len,
|
|
|
5317 Extcount *len_out,
|
|
|
5318 enum external_data_format fmt)
|
|
|
5319 {
|
|
|
5320 Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
|
|
|
5321
|
|
|
5322 if (!conversion_out_dynarr)
|
|
|
5323 conversion_out_dynarr = Dynarr_new (Extbyte);
|
|
|
5324 else
|
|
|
5325 Dynarr_reset (conversion_out_dynarr);
|
|
|
5326
|
|
|
5327 if (NILP (coding_system))
|
|
|
5328 {
|
|
|
5329 CONST Bufbyte *end = ptr + len;
|
|
|
5330
|
|
|
5331 for (; ptr < end;)
|
|
|
5332 {
|
|
|
5333 Bufbyte c =
|
|
|
5334 (BYTE_ASCII_P (*ptr)) ? *ptr :
|
|
|
5335 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
|
|
|
5336 (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
|
|
|
5337 '~';
|
|
|
5338
|
|
|
5339 Dynarr_add (conversion_out_dynarr, (Extbyte) c);
|
|
|
5340 INC_CHARPTR (ptr);
|
|
|
5341 }
|
|
|
5342
|
|
|
5343 #ifdef ERROR_CHECK_BUFPOS
|
|
|
5344 assert (ptr == end);
|
|
|
5345 #endif
|
|
|
5346 }
|
|
|
5347 else
|
|
|
5348 {
|
|
|
5349 Lisp_Object instream, outstream, da_outstream;
|
|
|
5350 Lstream *istr, *ostr;
|
|
|
5351 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
5352 char tempbuf[1024]; /* some random amount */
|
|
|
5353
|
|
|
5354 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
5355 da_outstream = make_dynarr_output_stream
|
|
|
5356 ((unsigned_char_dynarr *) conversion_out_dynarr);
|
|
|
5357 outstream =
|
|
|
5358 make_encoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
|
5359 istr = XLSTREAM (instream);
|
|
|
5360 ostr = XLSTREAM (outstream);
|
|
|
5361 GCPRO3 (instream, outstream, da_outstream);
|
|
|
5362 while (1)
|
|
|
5363 {
|
|
|
5364 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
5365 if (!size_in_bytes)
|
|
|
5366 break;
|
|
|
5367 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
5368 }
|
|
|
5369 Lstream_close (istr);
|
|
|
5370 Lstream_close (ostr);
|
|
|
5371 UNGCPRO;
|
|
|
5372 Lstream_delete (istr);
|
|
|
5373 Lstream_delete (ostr);
|
|
|
5374 Lstream_delete (XLSTREAM (da_outstream));
|
|
|
5375 }
|
|
|
5376
|
|
|
5377 *len_out = Dynarr_length (conversion_out_dynarr);
|
|
|
5378 Dynarr_add (conversion_out_dynarr, 0); /* remember to zero-terminate! */
|
|
|
5379 return Dynarr_atp (conversion_out_dynarr, 0);
|
|
|
5380 }
|
|
|
5381
|
|
|
5382 Bufbyte *
|
|
|
5383 convert_from_external_format (CONST Extbyte *ptr,
|
|
|
5384 Extcount len,
|
|
|
5385 Bytecount *len_out,
|
|
|
5386 enum external_data_format fmt)
|
|
|
5387 {
|
|
|
5388 Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
|
|
|
5389
|
|
|
5390 if (!conversion_in_dynarr)
|
|
|
5391 conversion_in_dynarr = Dynarr_new (Bufbyte);
|
|
|
5392 else
|
|
|
5393 Dynarr_reset (conversion_in_dynarr);
|
|
|
5394
|
|
|
5395 if (NILP (coding_system))
|
|
|
5396 {
|
|
|
5397 CONST Extbyte *end = ptr + len;
|
|
|
5398 for (; ptr < end; ptr++)
|
|
|
5399 {
|
|
|
5400 Extbyte c = *ptr;
|
|
|
5401 DECODE_ADD_BINARY_CHAR (c, conversion_in_dynarr);
|
|
|
5402 }
|
|
|
5403 }
|
|
|
5404 else
|
|
|
5405 {
|
|
|
5406 Lisp_Object instream, outstream, da_outstream;
|
|
|
5407 Lstream *istr, *ostr;
|
|
|
5408 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
5409 char tempbuf[1024]; /* some random amount */
|
|
|
5410
|
|
|
5411 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
5412 da_outstream = make_dynarr_output_stream
|
|
|
5413 ((unsigned_char_dynarr *) conversion_in_dynarr);
|
|
|
5414 outstream =
|
|
|
5415 make_decoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
|
5416 istr = XLSTREAM (instream);
|
|
|
5417 ostr = XLSTREAM (outstream);
|
|
|
5418 GCPRO3 (instream, outstream, da_outstream);
|
|
|
5419 while (1)
|
|
|
5420 {
|
|
|
5421 int size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
5422 if (!size_in_bytes)
|
|
|
5423 break;
|
|
|
5424 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
5425 }
|
|
|
5426 Lstream_close (istr);
|
|
|
5427 Lstream_close (ostr);
|
|
|
5428 UNGCPRO;
|
|
|
5429 Lstream_delete (istr);
|
|
|
5430 Lstream_delete (ostr);
|
|
|
5431 Lstream_delete (XLSTREAM (da_outstream));
|
|
|
5432 }
|
|
|
5433
|
|
|
5434 *len_out = Dynarr_length (conversion_in_dynarr);
|
|
|
5435 Dynarr_add (conversion_in_dynarr, 0); /* remember to zero-terminate! */
|
|
|
5436 return Dynarr_atp (conversion_in_dynarr, 0);
|
|
|
5437 }
|
|
|
5438
|
|
|
5439
|
|
259
|
5440 /************************************************************************/
|
|
|
5441 /* Initialization */
|
|
|
5442 /************************************************************************/
|
|
|
5443
|
|
|
5444 void
|
|
414
|
5445 syms_of_file_coding (void)
|
|
259
|
5446 {
|
|
412
|
5447 defsymbol (&Qbuffer_file_coding_system, "buffer-file-coding-system");
|
|
259
|
5448 deferror (&Qcoding_system_error, "coding-system-error",
|
|
|
5449 "Coding-system error", Qio_error);
|
|
|
5450
|
|
|
5451 DEFSUBR (Fcoding_system_p);
|
|
|
5452 DEFSUBR (Ffind_coding_system);
|
|
|
5453 DEFSUBR (Fget_coding_system);
|
|
|
5454 DEFSUBR (Fcoding_system_list);
|
|
|
5455 DEFSUBR (Fcoding_system_name);
|
|
|
5456 DEFSUBR (Fmake_coding_system);
|
|
|
5457 DEFSUBR (Fcopy_coding_system);
|
|
398
|
5458 DEFSUBR (Fdefine_coding_system_alias);
|
|
259
|
5459 DEFSUBR (Fsubsidiary_coding_system);
|
|
|
5460
|
|
|
5461 DEFSUBR (Fcoding_system_type);
|
|
|
5462 DEFSUBR (Fcoding_system_doc_string);
|
|
|
5463 #ifdef MULE
|
|
|
5464 DEFSUBR (Fcoding_system_charset);
|
|
|
5465 #endif
|
|
|
5466 DEFSUBR (Fcoding_system_property);
|
|
|
5467
|
|
|
5468 DEFSUBR (Fcoding_category_list);
|
|
|
5469 DEFSUBR (Fset_coding_priority_list);
|
|
|
5470 DEFSUBR (Fcoding_priority_list);
|
|
|
5471 DEFSUBR (Fset_coding_category_system);
|
|
|
5472 DEFSUBR (Fcoding_category_system);
|
|
|
5473
|
|
|
5474 DEFSUBR (Fdetect_coding_region);
|
|
|
5475 DEFSUBR (Fdecode_coding_region);
|
|
|
5476 DEFSUBR (Fencode_coding_region);
|
|
|
5477 #ifdef MULE
|
|
|
5478 DEFSUBR (Fdecode_shift_jis_char);
|
|
|
5479 DEFSUBR (Fencode_shift_jis_char);
|
|
|
5480 DEFSUBR (Fdecode_big5_char);
|
|
|
5481 DEFSUBR (Fencode_big5_char);
|
|
396
|
5482 DEFSUBR (Fset_ucs_char);
|
|
|
5483 DEFSUBR (Fucs_char);
|
|
|
5484 DEFSUBR (Fset_char_ucs);
|
|
|
5485 DEFSUBR (Fchar_ucs);
|
|
259
|
5486 #endif /* MULE */
|
|
412
|
5487 defsymbol (&Qcoding_system_p, "coding-system-p");
|
|
259
|
5488 defsymbol (&Qno_conversion, "no-conversion");
|
|
416
|
5489 defsymbol (&Qraw_text, "raw-text");
|
|
259
|
5490 #ifdef MULE
|
|
|
5491 defsymbol (&Qbig5, "big5");
|
|
|
5492 defsymbol (&Qshift_jis, "shift-jis");
|
|
396
|
5493 defsymbol (&Qucs4, "ucs-4");
|
|
|
5494 defsymbol (&Qutf8, "utf-8");
|
|
259
|
5495 defsymbol (&Qccl, "ccl");
|
|
|
5496 defsymbol (&Qiso2022, "iso2022");
|
|
|
5497 #endif /* MULE */
|
|
|
5498 defsymbol (&Qmnemonic, "mnemonic");
|
|
|
5499 defsymbol (&Qeol_type, "eol-type");
|
|
|
5500 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
|
5501 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
|
5502
|
|
|
5503 defsymbol (&Qcr, "cr");
|
|
|
5504 defsymbol (&Qlf, "lf");
|
|
|
5505 defsymbol (&Qcrlf, "crlf");
|
|
|
5506 defsymbol (&Qeol_cr, "eol-cr");
|
|
|
5507 defsymbol (&Qeol_lf, "eol-lf");
|
|
|
5508 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
|
5509 #ifdef MULE
|
|
|
5510 defsymbol (&Qcharset_g0, "charset-g0");
|
|
|
5511 defsymbol (&Qcharset_g1, "charset-g1");
|
|
|
5512 defsymbol (&Qcharset_g2, "charset-g2");
|
|
|
5513 defsymbol (&Qcharset_g3, "charset-g3");
|
|
|
5514 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
|
5515 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
|
5516 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
|
5517 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
|
5518 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
|
5519 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
|
5520 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
|
272
|
5521
|
|
259
|
5522 defsymbol (&Qshort, "short");
|
|
|
5523 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
|
5524 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
|
5525 defsymbol (&Qseven, "seven");
|
|
|
5526 defsymbol (&Qlock_shift, "lock-shift");
|
|
|
5527 defsymbol (&Qescape_quoted, "escape-quoted");
|
|
272
|
5528 #endif /* MULE */
|
|
259
|
5529 defsymbol (&Qencode, "encode");
|
|
|
5530 defsymbol (&Qdecode, "decode");
|
|
|
5531
|
|
|
5532 #ifdef MULE
|
|
412
|
5533 defsymbol (&Qctext, "ctext");
|
|
259
|
5534 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
|
5535 "shift-jis");
|
|
|
5536 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
|
5537 "big5");
|
|
396
|
5538 defsymbol (&coding_category_symbol[CODING_CATEGORY_UCS4],
|
|
|
5539 "ucs-4");
|
|
|
5540 defsymbol (&coding_category_symbol[CODING_CATEGORY_UTF8],
|
|
|
5541 "utf-8");
|
|
259
|
5542 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
|
5543 "iso-7");
|
|
|
5544 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
|
5545 "iso-8-designate");
|
|
|
5546 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
|
5547 "iso-8-1");
|
|
|
5548 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
|
5549 "iso-8-2");
|
|
|
5550 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
|
5551 "iso-lock-shift");
|
|
272
|
5552 #endif /* MULE */
|
|
259
|
5553 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
|
5554 "no-conversion");
|
|
|
5555 }
|
|
|
5556
|
|
|
5557 void
|
|
414
|
5558 lstream_type_create_file_coding (void)
|
|
259
|
5559 {
|
|
|
5560 LSTREAM_HAS_METHOD (decoding, reader);
|
|
|
5561 LSTREAM_HAS_METHOD (decoding, writer);
|
|
|
5562 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
|
5563 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
|
5564 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
|
5565 LSTREAM_HAS_METHOD (decoding, closer);
|
|
|
5566 LSTREAM_HAS_METHOD (decoding, marker);
|
|
|
5567
|
|
|
5568 LSTREAM_HAS_METHOD (encoding, reader);
|
|
|
5569 LSTREAM_HAS_METHOD (encoding, writer);
|
|
|
5570 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
|
5571 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
|
5572 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
|
5573 LSTREAM_HAS_METHOD (encoding, closer);
|
|
|
5574 LSTREAM_HAS_METHOD (encoding, marker);
|
|
|
5575 }
|
|
|
5576
|
|
|
5577 void
|
|
414
|
5578 vars_of_file_coding (void)
|
|
259
|
5579 {
|
|
|
5580 int i;
|
|
|
5581
|
|
|
5582 /* Initialize to something reasonable ... */
|
|
|
5583 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
5584 {
|
|
412
|
5585 coding_category_system[i] = Qnil;
|
|
|
5586 coding_category_by_priority[i] = i;
|
|
259
|
5587 }
|
|
|
5588
|
|
|
5589 Fprovide (intern ("file-coding"));
|
|
|
5590
|
|
|
5591 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
5592 Coding system used for TTY keyboard input.
|
|
|
5593 Not used under a windowing system.
|
|
|
5594 */ );
|
|
|
5595 Vkeyboard_coding_system = Qnil;
|
|
|
5596
|
|
|
5597 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
5598 Coding system used for TTY display output.
|
|
|
5599 Not used under a windowing system.
|
|
|
5600 */ );
|
|
|
5601 Vterminal_coding_system = Qnil;
|
|
|
5602
|
|
|
5603 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
412
|
5604 Overriding coding system used when writing a file or process.
|
|
|
5605 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
5606 the coding system that will be used when a file or process is read
|
|
|
5607 in, and overrides `buffer-file-coding-system-for-read',
|
|
259
|
5608 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
412
|
5609 this one for permanent changes to the environment.
|
|
|
5610 */ );
|
|
259
|
5611 Vcoding_system_for_read = Qnil;
|
|
|
5612
|
|
|
5613 DEFVAR_LISP ("coding-system-for-write",
|
|
|
5614 &Vcoding_system_for_write /*
|
|
412
|
5615 Overriding coding system used when writing a file or process.
|
|
|
5616 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
5617 the coding system that will be used when a file or process is wrote
|
|
|
5618 in, and overrides `buffer-file-coding-system',
|
|
|
5619 `write-region-pre-hook', etc. Use those variables instead of this one
|
|
|
5620 for permanent changes to the environment.
|
|
|
5621 */ );
|
|
259
|
5622 Vcoding_system_for_write = Qnil;
|
|
|
5623
|
|
|
5624 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
|
5625 Coding system used to convert pathnames when accessing files.
|
|
|
5626 */ );
|
|
|
5627 Vfile_name_coding_system = Qnil;
|
|
|
5628
|
|
|
5629 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
|
5630 Non-nil means the buffer contents are regarded as multi-byte form
|
|
|
5631 of characters, not a binary code. This affects the display, file I/O,
|
|
|
5632 and behaviors of various editing commands.
|
|
|
5633
|
|
|
5634 Setting this to nil does not do anything.
|
|
|
5635 */ );
|
|
|
5636 enable_multibyte_characters = 1;
|
|
|
5637 }
|
|
|
5638
|
|
|
5639 void
|
|
414
|
5640 complex_vars_of_file_coding (void)
|
|
259
|
5641 {
|
|
380
|
5642 staticpro (&Vcoding_system_hash_table);
|
|
|
5643 Vcoding_system_hash_table =
|
|
|
5644 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
259
|
5645
|
|
|
5646 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
|
|
|
5647
|
|
|
5648 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
|
5649 { \
|
|
|
5650 struct codesys_prop csp; \
|
|
|
5651 csp.sym = (Sym); \
|
|
|
5652 csp.prop_type = (Prop_Type); \
|
|
|
5653 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
|
5654 } while (0)
|
|
|
5655
|
|
|
5656 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
|
5657 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
|
5658 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
|
5659 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
|
5660 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
|
5661 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
|
5662 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
|
5663 #ifdef MULE
|
|
|
5664 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
|
5665 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
|
5666 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
|
5667 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
|
5668 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
|
5669 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
|
5670 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
|
5671 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
|
5672 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
|
5673 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
|
5674 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
|
5675 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
|
5676 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
|
5677 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
|
5678 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
|
5679 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
|
5680 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
|
5681
|
|
|
5682 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
|
5683 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
|
5684 #endif /* MULE */
|
|
|
5685 /* Need to create this here or we're really screwed. */
|
|
416
|
5686 Fmake_coding_system
|
|
|
5687 (Qraw_text, Qno_conversion,
|
|
|
5688 build_string ("Raw text, which means it converts only line-break-codes."),
|
|
|
5689 list2 (Qmnemonic, build_string ("Raw")));
|
|
|
5690
|
|
|
5691 Fmake_coding_system
|
|
|
5692 (Qbinary, Qno_conversion,
|
|
|
5693 build_string ("Binary, which means it does not convert anything."),
|
|
|
5694 list4 (Qeol_type, Qlf,
|
|
|
5695 Qmnemonic, build_string ("Binary")));
|
|
|
5696
|
|
|
5697 Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
|
|
259
|
5698
|
|
|
5699 /* Need this for bootstrapping */
|
|
412
|
5700 coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
|
416
|
5701 Fget_coding_system (Qraw_text);
|
|
396
|
5702
|
|
|
5703 #ifdef MULE
|
|
|
5704 {
|
|
|
5705 unsigned int i;
|
|
|
5706
|
|
|
5707 for (i = 0; i < 65536; i++)
|
|
412
|
5708 ucs_to_mule_table[i] = Qnil;
|
|
396
|
5709 }
|
|
|
5710 staticpro (&mule_to_ucs_table);
|
|
|
5711 mule_to_ucs_table = Fmake_char_table(Qgeneric);
|
|
|
5712 #endif /* MULE */
|
|
259
|
5713 }
|
