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70
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1 /* Code conversion functions.
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2 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.3. Not in FSF. */
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23
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24 /* Rewritten by Ben Wing <wing@666.com>. */
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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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28
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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 #include "mule-coding.h"
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34
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110
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35 Lisp_Object Qbuffer_file_coding_system, Qcoding_system_error;
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70
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36
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37 Lisp_Object Vkeyboard_coding_system;
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38 Lisp_Object Vterminal_coding_system;
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120
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39 Lisp_Object Vcoding_system_for_read;
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40 Lisp_Object Vcoding_system_for_write;
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70
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41 Lisp_Object Vpathname_coding_system;
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42
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43 /* Table of symbols identifying each coding category. */
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44 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST + 1];
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45
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46 /* Coding system currently associated with each coding category. */
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47 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
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48
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49 /* Table of all coding categories in decreasing order of priority.
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50 This describes a permutation of the possible coding categories. */
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51 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
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52
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53 Lisp_Object Qcoding_system_p;
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54
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55 Lisp_Object Qbig5, Qshift_jis, Qno_conversion, Qccl, Qiso2022;
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56 /* Qinternal in general.c */
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57
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58 Lisp_Object Qmnemonic, Qeol_type;
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59 Lisp_Object Qcr, Qcrlf, Qlf;
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60 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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61 Lisp_Object Qpost_read_conversion;
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62 Lisp_Object Qpre_write_conversion;
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63
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64 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
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65 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
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66 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
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67 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
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68 Lisp_Object Qno_iso6429, Qescape_quoted;
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69 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
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70
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71 Lisp_Object Qencode, Qdecode;
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72
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73 Lisp_Object Qctext;
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74
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75 Lisp_Object Vcoding_system_hashtable;
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76
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114
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77 int enable_multibyte_characters;
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78
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70
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79 /* Additional information used by the ISO2022 decoder and detector. */
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80 struct iso2022_decoder
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81 {
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82 /* CHARSET holds the character sets currently assigned to the G0
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83 through G3 variables. It is initialized from the array
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84 INITIAL_CHARSET in CODESYS. */
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85 Lisp_Object charset[4];
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86
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87 /* Which registers are currently invoked into the left (GL) and
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88 right (GR) halves of the 8-bit encoding space? */
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89 int register_left, register_right;
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183
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90
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70
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91 /* ISO_ESC holds a value indicating part of an escape sequence
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92 that has already been seen. */
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93 enum iso_esc_flag esc;
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183
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94
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70
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95 /* This records the bytes we've seen so far in an escape sequence,
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96 in case the sequence is invalid (we spit out the bytes unchanged). */
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97 unsigned char esc_bytes[8];
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183
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98
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70
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99 /* Index for next byte to store in ISO escape sequence. */
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100 int esc_bytes_index;
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101
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102 /* Stuff seen so far when composing a string. */
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103 unsigned_char_dynarr *composite_chars;
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104
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105 /* If we saw an invalid designation sequence for a particular
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106 register, we flag it here and switch to ASCII. The next time we
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107 see a valid designation for this register, we turn off the flag
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108 and do the designation normally, but pretend the sequence was
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109 invalid. The effect of all this is that (most of the time) the
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110 escape sequences for both the switch to the unknown charset, and
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111 the switch back to the known charset, get inserted literally into
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112 the buffer and saved out as such. The hope is that we can
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113 preserve the escape sequences so that the resulting written out
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114 file makes sense. If we don't do any of this, the designation
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115 to the invalid charset will be preserved but that switch back
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116 to the known charset will probably get eaten because it was
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117 the same charset that was already present in the register. */
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118 unsigned char invalid_designated[4];
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119
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120 /* We try to do similar things as above for direction-switching
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121 sequences. If we encountered a direction switch while an
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122 invalid designation was present, or an invalid designation
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123 just after a direction switch (i.e. no valid designation
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124 encountered yet), we insert the direction-switch escape
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125 sequence literally into the output stream, and later on
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126 insert the corresponding direction-restoring escape sequence
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127 literally also. */
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74
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128 unsigned int switched_dir_and_no_valid_charset_yet :1;
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129 unsigned int invalid_switch_dir :1;
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70
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130
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131 /* Tells the decoder to output the escape sequence literally
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132 even though it was valid. Used in the games we play to
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133 avoid lossage when we encounter invalid designations. */
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74
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134 unsigned int output_literally :1;
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70
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135 /* We encountered a direction switch followed by an invalid
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136 designation. We didn't output the direction switch
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137 literally because we didn't know about the invalid designation;
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138 but we have to do so now. */
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74
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139 unsigned int output_direction_sequence :1;
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70
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140 };
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141
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142 Lisp_Object Fcopy_coding_system (Lisp_Object old_coding_system,
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143 Lisp_Object new_name);
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144 struct detection_state;
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74
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145 static int detect_coding_sjis (struct detection_state *st,
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146 CONST unsigned char *src,
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147 unsigned int n);
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148 static void decode_coding_sjis (Lstream *decoding,
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149 CONST unsigned char *src,
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150 unsigned_char_dynarr *dst,
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151 unsigned int n);
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152 static void encode_coding_sjis (Lstream *encoding,
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153 CONST unsigned char *src,
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154 unsigned_char_dynarr *dst,
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155 unsigned int n);
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70
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156 static int detect_coding_big5 (struct detection_state *st,
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157 CONST unsigned char *src,
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158 unsigned int n);
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159 static void decode_coding_big5 (Lstream *decoding,
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160 CONST unsigned char *src,
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161 unsigned_char_dynarr *dst, unsigned int n);
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162 static void encode_coding_big5 (Lstream *encoding,
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163 CONST unsigned char *src,
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164 unsigned_char_dynarr *dst, unsigned int n);
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165 static int postprocess_iso2022_mask (int mask);
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166 static void reset_iso2022 (Lisp_Object coding_system,
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167 struct iso2022_decoder *iso);
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168 static int detect_coding_iso2022 (struct detection_state *st,
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169 CONST unsigned char *src,
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170 unsigned int n);
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171 static void decode_coding_iso2022 (Lstream *decoding,
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172 CONST unsigned char *src,
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173 unsigned_char_dynarr *dst, unsigned int n);
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174 static void encode_coding_iso2022 (Lstream *encoding,
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175 CONST unsigned char *src,
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176 unsigned_char_dynarr *dst, unsigned int n);
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177 static void decode_coding_no_conversion (Lstream *decoding,
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178 CONST unsigned char *src,
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179 unsigned_char_dynarr *dst,
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180 unsigned int n);
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181 static void encode_coding_no_conversion (Lstream *encoding,
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182 CONST unsigned char *src,
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183 unsigned_char_dynarr *dst,
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184 unsigned int n);
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185 static void mule_decode (Lstream *decoding, CONST unsigned char *src,
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186 unsigned_char_dynarr *dst, unsigned int n);
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187 static void mule_encode (Lstream *encoding, CONST unsigned char *src,
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188 unsigned_char_dynarr *dst, unsigned int n);
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189
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190 struct codesys_prop
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191 {
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192 Lisp_Object sym;
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193 int prop_type;
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194 };
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195
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196 typedef struct codesys_prop_dynarr_type
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197 {
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198 Dynarr_declare (struct codesys_prop);
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199 } codesys_prop_dynarr;
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200
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201 codesys_prop_dynarr *the_codesys_prop_dynarr;
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202
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203 enum codesys_prop_enum
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204 {
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205 CODESYS_PROP_ALL_OK,
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206 CODESYS_PROP_ISO2022,
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207 CODESYS_PROP_CCL
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208 };
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209
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210
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211 /************************************************************************/
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212 /* Coding system functions */
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213 /************************************************************************/
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214
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215 static Lisp_Object mark_coding_system (Lisp_Object, void (*) (Lisp_Object));
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216 static void print_coding_system (Lisp_Object, Lisp_Object, int);
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217 static void finalize_coding_system (void *header, int for_disksave);
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218
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219 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
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220 mark_coding_system, print_coding_system,
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221 finalize_coding_system,
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222 0, 0, struct Lisp_Coding_System);
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223
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224 static Lisp_Object
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225 mark_coding_system (Lisp_Object obj, void (*markobj) (Lisp_Object))
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226 {
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227 struct Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
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228
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229 (markobj) (CODING_SYSTEM_NAME (codesys));
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230 (markobj) (CODING_SYSTEM_DOC_STRING (codesys));
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231 (markobj) (CODING_SYSTEM_MNEMONIC (codesys));
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232 (markobj) (CODING_SYSTEM_EOL_LF (codesys));
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233 (markobj) (CODING_SYSTEM_EOL_CRLF (codesys));
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234 (markobj) (CODING_SYSTEM_EOL_CR (codesys));
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183
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235
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70
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236 switch (CODING_SYSTEM_TYPE (codesys))
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237 {
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181
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238 int i;
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70
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239 case CODESYS_ISO2022:
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240 for (i = 0; i < 4; i++)
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241 (markobj) (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
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242 if (codesys->iso2022.input_conv)
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243 {
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244 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
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245 {
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246 struct charset_conversion_spec *ccs =
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247 Dynarr_atp (codesys->iso2022.input_conv, i);
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248 (markobj) (ccs->from_charset);
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249 (markobj) (ccs->to_charset);
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250 }
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251 }
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252 if (codesys->iso2022.output_conv)
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253 {
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254 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
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255 {
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256 struct charset_conversion_spec *ccs =
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257 Dynarr_atp (codesys->iso2022.output_conv, i);
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258 (markobj) (ccs->from_charset);
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259 (markobj) (ccs->to_charset);
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260 }
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261 }
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262 break;
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263
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264 case CODESYS_CCL:
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265 (markobj) (CODING_SYSTEM_CCL_DECODE (codesys));
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266 (markobj) (CODING_SYSTEM_CCL_ENCODE (codesys));
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267 break;
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268 default:
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269 break;
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270 }
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271
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272 (markobj) (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
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273 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
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274 }
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275
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276 static void
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277 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
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278 int escapeflag)
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279 {
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280 struct Lisp_Coding_System *c = XCODING_SYSTEM (obj);
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281 if (print_readably)
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282 error ("printing unreadable object #<coding_system 0x%x>",
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283 c->header.uid);
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284
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285 write_c_string ("#<coding_system ", printcharfun);
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286 print_internal (c->name, printcharfun, 1);
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287 write_c_string (">", printcharfun);
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288 }
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289
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290 static void
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291 finalize_coding_system (void *header, int for_disksave)
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292 {
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293 struct Lisp_Coding_System *c = (struct Lisp_Coding_System *) header;
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294 /* Since coding systems never go away, this function is not
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295 necessary. But it would be necessary if we changed things
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296 so that coding systems could go away. */
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297 if (!for_disksave) /* see comment in lstream.c */
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298 {
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299 switch (CODING_SYSTEM_TYPE (c))
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300 {
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301 case CODESYS_ISO2022:
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302 if (c->iso2022.input_conv)
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303 {
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304 Dynarr_free (c->iso2022.input_conv);
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305 c->iso2022.input_conv = 0;
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306 }
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307 if (c->iso2022.output_conv)
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308 {
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309 Dynarr_free (c->iso2022.output_conv);
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310 c->iso2022.output_conv = 0;
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311 }
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312 break;
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313
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314 default:
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315 break;
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316 }
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317 }
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318 }
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319
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179
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320 static enum eol_type
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70
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321 symbol_to_eol_type (Lisp_Object symbol)
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322 {
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323 CHECK_SYMBOL (symbol);
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179
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324 if (NILP (symbol)) return EOL_AUTODETECT;
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325 if (EQ (symbol, Qlf)) return EOL_LF;
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326 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
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327 if (EQ (symbol, Qcr)) return EOL_CR;
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328
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329 signal_simple_error ("Unrecognized eol type", symbol);
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330 return EOL_AUTODETECT; /* not reached */
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70
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331 }
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332
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333 static Lisp_Object
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179
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334 eol_type_to_symbol (enum eol_type type)
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70
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335 {
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179
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336 switch (type)
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70
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337 {
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338 case EOL_LF: return Qlf;
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339 case EOL_CRLF: return Qcrlf;
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340 case EOL_CR: return Qcr;
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341 case EOL_AUTODETECT: return Qnil;
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179
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342 default: abort (); return Qnil; /* not reached */
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70
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343 }
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344 }
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345
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346 static void
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347 setup_eol_coding_systems (struct Lisp_Coding_System *codesys)
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348 {
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349 Lisp_Object codesys_obj = Qnil;
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350 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
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351 char *codesys_name = (char *) alloca (len + 7);
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352 Lisp_Object codesys_name_sym, sub_codesys_obj;
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183
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353
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70
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354 /* kludge */
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355
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356 XSETCODING_SYSTEM (codesys_obj, codesys);
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357
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358 memcpy (codesys_name,
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359 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
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183
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360
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70
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361 #define DEFINE_SUB_CODESYS(op_sys, Type) do { \
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362 strcpy (codesys_name + len, "-" op_sys); \
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363 codesys_name_sym = intern (codesys_name); \
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364 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
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365 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
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366 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
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367 } while (0)
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368
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369 DEFINE_SUB_CODESYS("unix", EOL_LF);
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370 DEFINE_SUB_CODESYS("dos", EOL_CRLF);
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371 DEFINE_SUB_CODESYS("mac", EOL_CR);
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372 }
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373
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374 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
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375 T if OBJECT is a coding system.
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376 A coding system is an object that defines how text containing multiple
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377 character sets is encoded into a stream of (typically 8-bit) bytes.
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378 The coding system is used to decode the stream into a series of
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|
|
379 characters (which may be from multiple charsets) when the text is read
|
|
|
380 from a file or process, and is used to encode the text back into the
|
|
|
381 same format when it is written out to a file or process.
|
|
|
382
|
|
|
383 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
384 Text, which is used for inter-client data under the X Window System)
|
|
|
385 use escape sequences to switch between different charsets -- Japanese
|
|
|
386 Kanji, for example, is invoked with \"ESC $ ( B\"; ASCII is invoked
|
|
|
387 with \"ESC ( B\"; and Cyrillic is invoked with \"ESC - L\". See
|
|
|
388 `make-coding-system' for more information.
|
|
|
389
|
|
|
390 Coding systems are normally identified using a symbol, and the
|
|
|
391 symbol is accepted in place of the actual coding system object whenever
|
|
|
392 a coding system is called for. (This is similar to how faces work.)
|
|
|
393 */
|
|
|
394 (object))
|
|
|
395 {
|
|
|
396 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
397 }
|
|
|
398
|
|
|
399 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
400 Retrieve the coding system of the given name.
|
|
|
401
|
|
|
402 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
403 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
404 If there is no such coding system, nil is returned. Otherwise the
|
|
|
405 associated coding system object is returned.
|
|
|
406 */
|
|
|
407 (coding_system_or_name))
|
|
|
408 {
|
|
|
409 if (NILP (coding_system_or_name))
|
|
|
410 coding_system_or_name = Qbinary;
|
|
|
411 if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
412 return coding_system_or_name;
|
|
|
413 CHECK_SYMBOL (coding_system_or_name);
|
|
|
414
|
|
|
415 return Fgethash (coding_system_or_name, Vcoding_system_hashtable, Qnil);
|
|
|
416 }
|
|
|
417
|
|
|
418 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
419 Retrieve the coding system of the given name.
|
|
|
420 Same as `find-coding-system' except that if there is no such
|
|
|
421 coding system, an error is signaled instead of returning nil.
|
|
|
422 */
|
|
|
423 (name))
|
|
|
424 {
|
|
|
425 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
426
|
|
|
427 if (NILP (coding_system))
|
|
|
428 signal_simple_error ("No such coding system", name);
|
|
|
429 return coding_system;
|
|
|
430 }
|
|
|
431
|
|
|
432 /* We store the coding systems in hash tables with the names as the key and the
|
|
|
433 actual coding system object as the value. Occasionally we need to use them
|
|
|
434 in a list format. These routines provide us with that. */
|
|
|
435 struct coding_system_list_closure
|
|
|
436 {
|
|
|
437 Lisp_Object *coding_system_list;
|
|
|
438 };
|
|
|
439
|
|
|
440 static void
|
|
|
441 add_coding_system_to_list_mapper (CONST void *hash_key, void *hash_contents,
|
|
|
442 void *coding_system_list_closure)
|
|
|
443 {
|
|
|
444 /* This function can GC */
|
|
|
445 Lisp_Object key, contents;
|
|
|
446 Lisp_Object *coding_system_list;
|
|
|
447 struct coding_system_list_closure *chcl = coding_system_list_closure;
|
|
|
448 CVOID_TO_LISP (key, hash_key);
|
|
|
449 VOID_TO_LISP (contents, hash_contents);
|
|
|
450 coding_system_list = chcl->coding_system_list;
|
|
|
451
|
|
|
452 *coding_system_list = Fcons (XCODING_SYSTEM (contents)->name,
|
|
|
453 *coding_system_list);
|
|
|
454 }
|
|
|
455
|
|
|
456 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
|
457 Return a list of the names of all defined coding systems.
|
|
|
458 */
|
|
|
459 ())
|
|
|
460 {
|
|
|
461 Lisp_Object coding_system_list = Qnil;
|
|
|
462 struct gcpro gcpro1;
|
|
|
463 struct coding_system_list_closure coding_system_list_closure;
|
|
|
464
|
|
|
465 GCPRO1 (coding_system_list);
|
|
|
466 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
|
467 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hashtable,
|
|
|
468 &coding_system_list_closure);
|
|
|
469 UNGCPRO;
|
|
|
470
|
|
|
471 return coding_system_list;
|
|
|
472 }
|
|
|
473
|
|
|
474 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
475 Return the name of the given coding system.
|
|
|
476 */
|
|
|
477 (coding_system))
|
|
|
478 {
|
|
|
479 coding_system = Fget_coding_system (coding_system);
|
|
173
|
480 return XCODING_SYSTEM_NAME (coding_system);
|
|
70
|
481 }
|
|
|
482
|
|
|
483 static struct Lisp_Coding_System *
|
|
179
|
484 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
|
|
70
|
485 {
|
|
|
486 struct Lisp_Coding_System *codesys;
|
|
|
487
|
|
|
488 codesys = (struct Lisp_Coding_System *)
|
|
|
489 alloc_lcrecord (sizeof (struct Lisp_Coding_System), lrecord_coding_system);
|
|
|
490
|
|
|
491 zero_lcrecord (codesys);
|
|
|
492 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
493 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
|
494 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
|
495 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
496 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
497 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
|
498 CODING_SYSTEM_TYPE (codesys) = type;
|
|
|
499
|
|
|
500 if (type == CODESYS_ISO2022)
|
|
|
501 {
|
|
|
502 int i;
|
|
|
503 for (i = 0; i < 4; i++)
|
|
|
504 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
|
505 }
|
|
|
506 else if (type == CODESYS_CCL)
|
|
|
507 {
|
|
|
508 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
|
509 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
|
510 }
|
|
|
511
|
|
|
512 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
513
|
|
|
514 return codesys;
|
|
|
515 }
|
|
|
516
|
|
|
517 /* Given a list of charset conversion specs as specified in a Lisp
|
|
|
518 program, parse it into STORE_HERE. */
|
|
|
519
|
|
|
520 static void
|
|
|
521 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
|
522 Lisp_Object spec_list)
|
|
|
523 {
|
|
|
524 Lisp_Object rest;
|
|
|
525
|
|
|
526 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
|
527 {
|
|
|
528 Lisp_Object car = XCAR (rest);
|
|
|
529 Lisp_Object from, to;
|
|
|
530 struct charset_conversion_spec spec;
|
|
|
531
|
|
|
532 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
|
533 signal_simple_error ("Invalid charset conversion spec", car);
|
|
|
534 from = Fget_charset (XCAR (car));
|
|
|
535 to = Fget_charset (XCAR (XCDR (car)));
|
|
|
536 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
|
537 signal_simple_error_2
|
|
|
538 ("Attempted conversion between different charset types",
|
|
|
539 from, to);
|
|
|
540 spec.from_charset = from;
|
|
|
541 spec.to_charset = to;
|
|
|
542
|
|
|
543 Dynarr_add (store_here, spec);
|
|
|
544 }
|
|
|
545 }
|
|
|
546
|
|
|
547 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
|
548 specs, return the equivalent as the Lisp programmer would see it.
|
|
|
549
|
|
|
550 If LOAD_HERE is 0, return Qnil. */
|
|
|
551
|
|
|
552 static Lisp_Object
|
|
|
553 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
|
554 {
|
|
|
555 int i;
|
|
|
556 Lisp_Object result = Qnil;
|
|
|
557
|
|
|
558 if (!load_here)
|
|
183
|
559 return Qnil;
|
|
70
|
560 for (i = 0; i < Dynarr_length (load_here); i++)
|
|
|
561 {
|
|
|
562 struct charset_conversion_spec *ccs =
|
|
|
563 Dynarr_atp (load_here, i);
|
|
|
564 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
|
565 }
|
|
|
566
|
|
|
567 return Fnreverse (result);
|
|
|
568 }
|
|
|
569
|
|
|
570 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
571 Register symbol NAME as a coding system.
|
|
|
572
|
|
|
573 TYPE describes the conversion method used and should be one of
|
|
|
574
|
|
120
|
575 nil or 'automatic-conversion
|
|
70
|
576 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
577 used in the file.
|
|
|
578 'no-conversion
|
|
|
579 No conversion. Use this for binary files and such. On output,
|
|
|
580 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
581 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
582 characters will only be present if you explicitly insert them.)
|
|
|
583 'shift-jis
|
|
|
584 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
|
585 'iso2022
|
|
|
586 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
587 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
588 standard Unix encoding for Japanese and other languages), and
|
|
|
589 Compound Text (the encoding used in X11). You can specify more
|
|
|
590 specific information about the conversion with the FLAGS argument.
|
|
|
591 'big5
|
|
|
592 Big5 (the encoding commonly used for Taiwanese).
|
|
|
593 'ccl
|
|
|
594 The conversion is performed using a user-written pseudo-code
|
|
|
595 program. CCL (Code Conversion Language) is the name of this
|
|
|
596 pseudo-code.
|
|
|
597 'internal
|
|
|
598 Write out or read in the raw contents of the memory representing
|
|
|
599 the buffer's text. This is primarily useful for debugging
|
|
|
600 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
601 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
602 WARNING: Reading in a file using 'internal conversion can result
|
|
|
603 in an internal inconsistency in the memory representing a
|
|
|
604 buffer's text, which will produce unpredictable results and may
|
|
|
605 cause XEmacs to crash. Under normal circumstances you should
|
|
|
606 never use 'internal conversion.
|
|
|
607
|
|
|
608 DOC-STRING is a string describing the coding system.
|
|
|
609
|
|
|
610 PROPS is a property list, describing the specific nature of the
|
|
|
611 character set. Recognized properties are:
|
|
|
612
|
|
|
613 'mnemonic
|
|
|
614 String to be displayed in the modeline when this coding system is
|
|
|
615 active.
|
|
|
616
|
|
|
617 'eol-type
|
|
|
618 End-of-line conversion to be used. It should be one of
|
|
|
619
|
|
|
620 nil
|
|
|
621 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
622 or CR). Also generate subsidiary coding systems named
|
|
|
623 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
624 identical to this coding system but have an EOL-TYPE
|
|
|
625 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
626 'lf
|
|
|
627 The end of a line is marked externally using ASCII LF.
|
|
|
628 Since this is also the way that XEmacs represents an
|
|
|
629 end-of-line internally, specifying this option results
|
|
|
630 in no end-of-line conversion. This is the standard
|
|
|
631 format for Unix text files.
|
|
|
632 'crlf
|
|
|
633 The end of a line is marked externally using ASCII
|
|
|
634 CRLF. This is the standard format for MS-DOS text
|
|
|
635 files.
|
|
|
636 'cr
|
|
|
637 The end of a line is marked externally using ASCII CR.
|
|
|
638 This is the standard format for Macintosh text files.
|
|
|
639 t
|
|
|
640 Automatically detect the end-of-line type but do not
|
|
|
641 generate subsidiary coding systems. (This value is
|
|
|
642 converted to nil when stored internally, and
|
|
|
643 `coding-system-property' will return nil.)
|
|
|
644
|
|
|
645 'post-read-conversion
|
|
|
646 Function called after a file has been read in, to perform the
|
|
|
647 decoding. Called with two arguments, BEG and END, denoting
|
|
|
648 a region of the current buffer to be decoded.
|
|
|
649
|
|
|
650 'pre-write-conversion
|
|
|
651 Function called before a file is written out, to perform the
|
|
|
652 encoding. Called with two arguments, BEG and END, denoting
|
|
|
653 a region of the current buffer to be encoded.
|
|
|
654
|
|
|
655
|
|
|
656 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
657
|
|
|
658 'charset-g0
|
|
|
659 'charset-g1
|
|
|
660 'charset-g2
|
|
|
661 'charset-g3
|
|
|
662 The character set initially designated to the G0 - G3 registers.
|
|
|
663 The value should be one of
|
|
|
664
|
|
|
665 -- A charset object (designate that character set)
|
|
|
666 -- nil (do not ever use this register)
|
|
|
667 -- t (no character set is initially designated to
|
|
|
668 the register, but may be later on; this automatically
|
|
|
669 sets the corresponding `force-g*-on-output' property)
|
|
|
670
|
|
|
671 'force-g0-on-output
|
|
|
672 'force-g1-on-output
|
|
|
673 'force-g2-on-output
|
|
|
674 'force-g2-on-output
|
|
|
675 If non-nil, send an explicit designation sequence on output before
|
|
|
676 using the specified register.
|
|
|
677
|
|
|
678 'short
|
|
|
679 If non-nil, use the short forms \"ESC $ @\", \"ESC $ A\", and
|
|
|
680 \"ESC $ B\" on output in place of the full designation sequences
|
|
|
681 \"ESC $ ( @\", \"ESC $ ( A\", and \"ESC $ ( B\".
|
|
|
682
|
|
|
683 'no-ascii-eol
|
|
|
684 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
685 Setting this to non-nil also suppresses other state-resetting that
|
|
|
686 normally happens at the end of a line.
|
|
|
687
|
|
|
688 'no-ascii-cntl
|
|
|
689 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
690
|
|
|
691 'seven
|
|
|
692 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
693 environment.
|
|
|
694
|
|
|
695 'lock-shift
|
|
|
696 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
697 or designation by escape sequence.
|
|
|
698
|
|
|
699 'no-iso6429
|
|
|
700 If non-nil, don't use ISO6429's direction specification.
|
|
|
701
|
|
|
702 'escape-quoted
|
|
|
703 If non-nil, literal control characters that are the same as
|
|
|
704 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
705 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
706 SS3 (0x8F), and CSI (0x9B)) are \"quoted\" with an escape character
|
|
|
707 so that they can be properly distinguished from an escape sequence.
|
|
|
708 (Note that doing this results in a non-portable encoding.) This
|
|
|
709 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
710 is a good choice for a quoting character because there are no
|
|
|
711 escape sequences whose second byte is a character from the Control-0
|
|
|
712 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
713 ISO2022 standard.
|
|
|
714
|
|
|
715 'input-charset-conversion
|
|
|
716 A list of conversion specifications, specifying conversion of
|
|
|
717 characters in one charset to another when decoding is performed.
|
|
|
718 Each specification is a list of two elements: the source charset,
|
|
|
719 and the destination charset.
|
|
|
720
|
|
|
721 'output-charset-conversion
|
|
|
722 A list of conversion specifications, specifying conversion of
|
|
|
723 characters in one charset to another when encoding is performed.
|
|
|
724 The form of each specification is the same as for
|
|
|
725 'input-charset-conversion.
|
|
|
726
|
|
|
727
|
|
|
728 The following additional properties are recognized (and required)
|
|
|
729 if TYPE is 'ccl:
|
|
|
730
|
|
|
731 'decode
|
|
|
732 CCL program used for decoding (converting to internal format).
|
|
|
733
|
|
|
734 'encode
|
|
|
735 CCL program used for encoding (converting to external format).
|
|
|
736 */
|
|
|
737 (name, type, doc_string, props))
|
|
|
738 {
|
|
|
739 struct Lisp_Coding_System *codesys;
|
|
|
740 Lisp_Object rest, key, value;
|
|
|
741 int ty;
|
|
|
742 int need_to_setup_eol_systems = 1;
|
|
|
743
|
|
183
|
744 /* Convert type to constant */
|
|
120
|
745 if (NILP (type) || EQ (type, Qautomatic_conversion))
|
|
|
746 { ty = CODESYS_AUTODETECT; }
|
|
|
747 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
|
748 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
|
749 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
|
|
750 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
|
751 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
70
|
752 #ifdef DEBUG_XEMACS
|
|
120
|
753 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
70
|
754 #endif
|
|
|
755 else
|
|
|
756 signal_simple_error ("Invalid coding system type", type);
|
|
|
757
|
|
|
758 CHECK_SYMBOL (name);
|
|
|
759
|
|
|
760 codesys = allocate_coding_system (ty, name);
|
|
|
761
|
|
|
762 if (NILP (doc_string))
|
|
|
763 doc_string = build_string ("");
|
|
|
764 else
|
|
|
765 CHECK_STRING (doc_string);
|
|
|
766 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
|
767
|
|
|
768 EXTERNAL_PROPERTY_LIST_LOOP (rest, key, value, props)
|
|
|
769 {
|
|
|
770 if (EQ (key, Qmnemonic))
|
|
|
771 {
|
|
|
772 if (!NILP (value))
|
|
|
773 CHECK_STRING (value);
|
|
|
774 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
|
775 }
|
|
|
776
|
|
|
777 else if (EQ (key, Qeol_type))
|
|
|
778 {
|
|
|
779 need_to_setup_eol_systems = NILP (value);
|
|
|
780 if (EQ (value, Qt))
|
|
|
781 value = Qnil;
|
|
|
782 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
|
783 }
|
|
|
784
|
|
|
785 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
|
786 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
|
787 else if (ty == CODESYS_ISO2022)
|
|
|
788 {
|
|
|
789 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
|
790 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
|
791 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
|
792
|
|
|
793 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
|
794 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
|
795 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
|
796 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
183
|
797
|
|
70
|
798 #define FROB_FORCE_CHARSET(charset_num) \
|
|
|
799 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
|
800
|
|
|
801 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
|
802 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
|
803 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
|
804 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
|
805
|
|
|
806 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
|
807 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
183
|
808
|
|
70
|
809 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
|
810 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
|
811 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
|
812 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
|
813 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
|
814 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
|
815 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
183
|
816
|
|
70
|
817 else if (EQ (key, Qinput_charset_conversion))
|
|
|
818 {
|
|
|
819 codesys->iso2022.input_conv =
|
|
|
820 Dynarr_new (struct charset_conversion_spec);
|
|
|
821 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
|
822 value);
|
|
|
823 }
|
|
|
824 else if (EQ (key, Qoutput_charset_conversion))
|
|
|
825 {
|
|
|
826 codesys->iso2022.output_conv =
|
|
|
827 Dynarr_new (struct charset_conversion_spec);
|
|
|
828 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
|
829 value);
|
|
|
830 }
|
|
|
831 else
|
|
|
832 signal_simple_error ("Unrecognized property", key);
|
|
|
833 }
|
|
|
834 else if (EQ (type, Qccl))
|
|
|
835 {
|
|
|
836 if (EQ (key, Qdecode))
|
|
|
837 {
|
|
|
838 CHECK_VECTOR (value);
|
|
|
839 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
|
840 }
|
|
|
841 else if (EQ (key, Qencode))
|
|
|
842 {
|
|
|
843 CHECK_VECTOR (value);
|
|
|
844 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
|
845 }
|
|
|
846 else
|
|
|
847 signal_simple_error ("Unrecognized property", key);
|
|
|
848 }
|
|
|
849 else
|
|
|
850 signal_simple_error ("Unrecognized property", key);
|
|
|
851 }
|
|
|
852
|
|
|
853 if (need_to_setup_eol_systems)
|
|
|
854 setup_eol_coding_systems (codesys);
|
|
183
|
855
|
|
70
|
856 {
|
|
|
857 Lisp_Object codesys_obj;
|
|
|
858 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
859 Fputhash (name, codesys_obj, Vcoding_system_hashtable);
|
|
|
860 return codesys_obj;
|
|
|
861 }
|
|
|
862 }
|
|
|
863
|
|
|
864 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
865 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
866 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
867 be created.
|
|
|
868 */
|
|
|
869 (old_coding_system, new_name))
|
|
|
870 {
|
|
|
871 Lisp_Object new_coding_system;
|
|
|
872 old_coding_system = Fget_coding_system (old_coding_system);
|
|
|
873 new_coding_system = Ffind_coding_system (new_name);
|
|
|
874 if (NILP (new_coding_system))
|
|
|
875 {
|
|
|
876 XSETCODING_SYSTEM (new_coding_system,
|
|
|
877 allocate_coding_system
|
|
|
878 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
|
879 new_name));
|
|
|
880 Fputhash (new_name, new_coding_system, Vcoding_system_hashtable);
|
|
|
881 }
|
|
|
882
|
|
|
883 {
|
|
|
884 struct Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
885 struct Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
|
886 memcpy (((char *) to ) + sizeof (to->header),
|
|
|
887 ((char *) from) + sizeof (from->header),
|
|
|
888 sizeof (*from) - sizeof (from->header));
|
|
|
889 to->name = new_name;
|
|
|
890 }
|
|
|
891 return new_coding_system;
|
|
|
892 }
|
|
|
893
|
|
|
894 static Lisp_Object
|
|
179
|
895 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
|
70
|
896 {
|
|
|
897 struct Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
898 Lisp_Object new_coding_system;
|
|
|
899
|
|
|
900 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
901 return coding_system;
|
|
179
|
902
|
|
|
903 switch (type)
|
|
70
|
904 {
|
|
179
|
905 case EOL_AUTODETECT: return coding_system;
|
|
70
|
906 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
907 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
908 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
|
909 default: abort ();
|
|
|
910 }
|
|
|
911
|
|
|
912 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
913 }
|
|
|
914
|
|
|
915 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
916 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
|
917 */
|
|
|
918 (coding_system, eol_type))
|
|
|
919 {
|
|
|
920 coding_system = Fget_coding_system (coding_system);
|
|
|
921
|
|
|
922 return subsidiary_coding_system (coding_system,
|
|
|
923 symbol_to_eol_type (eol_type));
|
|
|
924 }
|
|
|
925
|
|
|
926
|
|
|
927 /************************************************************************/
|
|
|
928 /* Coding system accessors */
|
|
|
929 /************************************************************************/
|
|
|
930
|
|
|
931 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
|
932 Return the doc string for CODING-SYSTEM.
|
|
|
933 */
|
|
|
934 (coding_system))
|
|
|
935 {
|
|
|
936 coding_system = Fget_coding_system (coding_system);
|
|
|
937 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
938 }
|
|
|
939
|
|
|
940 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
941 Return the type of CODING-SYSTEM.
|
|
|
942 */
|
|
|
943 (coding_system))
|
|
|
944 {
|
|
|
945 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
|
946 {
|
|
120
|
947 case CODESYS_AUTODETECT: return Qautomatic_conversion;
|
|
70
|
948 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
|
949 case CODESYS_ISO2022: return Qiso2022;
|
|
|
950 case CODESYS_BIG5: return Qbig5;
|
|
|
951 case CODESYS_CCL: return Qccl;
|
|
|
952 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
|
953 #ifdef DEBUG_XEMACS
|
|
|
954 case CODESYS_INTERNAL: return Qinternal;
|
|
|
955 #endif
|
|
|
956 default:
|
|
|
957 abort ();
|
|
|
958 }
|
|
|
959
|
|
|
960 return Qnil; /* not reached */
|
|
|
961 }
|
|
|
962
|
|
|
963 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
964 Return the PROP property of CODING-SYSTEM.
|
|
|
965 */
|
|
|
966 (coding_system, prop))
|
|
|
967 {
|
|
|
968 int i, ok = 0;
|
|
|
969 enum coding_system_type type;
|
|
|
970
|
|
|
971 coding_system = Fget_coding_system (coding_system);
|
|
|
972 CHECK_SYMBOL (prop);
|
|
|
973 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
|
974
|
|
|
975 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
|
976 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
|
977 {
|
|
|
978 ok = 1;
|
|
|
979 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
|
980 {
|
|
|
981 case CODESYS_PROP_ALL_OK:
|
|
|
982 break;
|
|
|
983
|
|
|
984 case CODESYS_PROP_ISO2022:
|
|
|
985 if (type != CODESYS_ISO2022)
|
|
|
986 signal_simple_error
|
|
|
987 ("Property only valid in ISO2022 coding systems",
|
|
|
988 prop);
|
|
|
989 break;
|
|
|
990
|
|
|
991 case CODESYS_PROP_CCL:
|
|
|
992 if (type != CODESYS_CCL)
|
|
|
993 signal_simple_error
|
|
|
994 ("Property only valid in CCL coding systems",
|
|
|
995 prop);
|
|
|
996 break;
|
|
|
997
|
|
|
998 default:
|
|
|
999 abort ();
|
|
|
1000 }
|
|
|
1001 }
|
|
|
1002
|
|
|
1003 if (!ok)
|
|
|
1004 signal_simple_error ("Unrecognized property", prop);
|
|
|
1005
|
|
|
1006 if (EQ (prop, Qname))
|
|
|
1007 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1008 else if (EQ (prop, Qtype))
|
|
|
1009 return Fcoding_system_type (coding_system);
|
|
|
1010 else if (EQ (prop, Qdoc_string))
|
|
|
1011 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1012 else if (EQ (prop, Qmnemonic))
|
|
|
1013 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
|
1014 else if (EQ (prop, Qeol_type))
|
|
|
1015 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
|
1016 else if (EQ (prop, Qeol_lf))
|
|
|
1017 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1018 else if (EQ (prop, Qeol_crlf))
|
|
|
1019 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1020 else if (EQ (prop, Qeol_cr))
|
|
|
1021 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1022 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1023 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1024 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1025 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
|
1026 else if (type == CODESYS_ISO2022)
|
|
|
1027 {
|
|
|
1028 #define INITIAL_CHARSET(charset_num) \
|
|
|
1029 (XCHARSET_NAME (XCODING_SYSTEM_ISO2022_INITIAL_CHARSET \
|
|
|
1030 (coding_system, charset_num)))
|
|
183
|
1031
|
|
70
|
1032 if (EQ (prop, Qcharset_g0)) return INITIAL_CHARSET (0);
|
|
|
1033 else if (EQ (prop, Qcharset_g1)) return INITIAL_CHARSET (1);
|
|
|
1034 else if (EQ (prop, Qcharset_g2)) return INITIAL_CHARSET (2);
|
|
|
1035 else if (EQ (prop, Qcharset_g3)) return INITIAL_CHARSET (3);
|
|
|
1036
|
|
|
1037 #define FORCE_CHARSET(charset_num) \
|
|
|
1038 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
|
1039 (coding_system, charset_num) ? Qt : Qnil)
|
|
|
1040
|
|
|
1041 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
|
1042 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
|
1043 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
|
1044 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
|
1045
|
|
|
1046 #define LISP_BOOLEAN(prop) \
|
|
|
1047 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
183
|
1048
|
|
70
|
1049 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
|
1050 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
|
1051 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
|
1052 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
|
1053 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
|
1054 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
|
1055 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
183
|
1056
|
|
70
|
1057 else if (EQ (prop, Qinput_charset_conversion))
|
|
|
1058 return
|
|
|
1059 unparse_charset_conversion_specs
|
|
|
1060 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
|
1061 else if (EQ (prop, Qoutput_charset_conversion))
|
|
|
1062 return
|
|
|
1063 unparse_charset_conversion_specs
|
|
|
1064 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
|
1065 else
|
|
|
1066 abort ();
|
|
|
1067 }
|
|
|
1068 else if (type == CODESYS_CCL)
|
|
|
1069 {
|
|
|
1070 if (EQ (prop, Qdecode))
|
|
|
1071 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
|
1072 else if (EQ (prop, Qencode))
|
|
|
1073 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
|
1074 else
|
|
|
1075 abort ();
|
|
|
1076 }
|
|
|
1077 else
|
|
|
1078 abort ();
|
|
|
1079
|
|
|
1080 return Qnil; /* not reached */
|
|
|
1081 }
|
|
|
1082
|
|
|
1083
|
|
|
1084 /************************************************************************/
|
|
|
1085 /* Coding category functions */
|
|
|
1086 /************************************************************************/
|
|
|
1087
|
|
|
1088 static int
|
|
|
1089 decode_coding_category (Lisp_Object symbol)
|
|
|
1090 {
|
|
|
1091 int i;
|
|
|
1092
|
|
|
1093 CHECK_SYMBOL (symbol);
|
|
|
1094 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1095 if (EQ (coding_category_symbol[i], symbol))
|
|
|
1096 return i;
|
|
|
1097
|
|
|
1098 signal_simple_error ("Unrecognized coding category", symbol);
|
|
|
1099 return 0; /* not reached */
|
|
|
1100 }
|
|
|
1101
|
|
|
1102 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
1103 Return a list of all recognized coding categories.
|
|
|
1104 */
|
|
|
1105 ())
|
|
|
1106 {
|
|
|
1107 int i;
|
|
|
1108 Lisp_Object list = Qnil;
|
|
|
1109
|
|
|
1110 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1111 list = Fcons (coding_category_symbol[i], list);
|
|
|
1112 return list;
|
|
|
1113 }
|
|
|
1114
|
|
|
1115 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
1116 Change the priority order of the coding categories.
|
|
|
1117 LIST should be list of coding categories, in descending order of
|
|
|
1118 priority. Unspecified coding categories will be lower in priority
|
|
|
1119 than all specified ones, in the same relative order they were in
|
|
|
1120 previously.
|
|
|
1121 */
|
|
|
1122 (list))
|
|
|
1123 {
|
|
|
1124 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
|
1125 int i, j;
|
|
|
1126 Lisp_Object rest;
|
|
|
1127
|
|
|
1128 /* First generate a list that maps coding categories to priorities. */
|
|
|
1129
|
|
|
1130 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1131 category_to_priority[i] = -1;
|
|
|
1132
|
|
|
1133 /* Highest priority comes from the specified list. */
|
|
|
1134 i = 0;
|
|
|
1135 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
1136 {
|
|
|
1137 int cat = decode_coding_category (XCAR (rest));
|
|
|
1138
|
|
|
1139 if (category_to_priority[cat] >= 0)
|
|
|
1140 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
|
1141 category_to_priority[cat] = i++;
|
|
|
1142 }
|
|
|
1143
|
|
|
1144 /* Now go through the existing categories by priority to retrieve
|
|
|
1145 the categories not yet specified and preserve their priority
|
|
|
1146 order. */
|
|
|
1147 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
|
1148 {
|
|
|
1149 int cat = coding_category_by_priority[j];
|
|
|
1150 if (category_to_priority[cat] < 0)
|
|
|
1151 category_to_priority[cat] = i++;
|
|
|
1152 }
|
|
|
1153
|
|
|
1154 /* Now we need to construct the inverse of the mapping we just
|
|
|
1155 constructed. */
|
|
|
1156
|
|
|
1157 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1158 coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
1159
|
|
|
1160 /* Phew! That was confusing. */
|
|
|
1161 return Qnil;
|
|
|
1162 }
|
|
|
1163
|
|
|
1164 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
1165 Return a list of coding categories in descending order of priority.
|
|
|
1166 */
|
|
|
1167 ())
|
|
|
1168 {
|
|
|
1169 int i;
|
|
|
1170 Lisp_Object list = Qnil;
|
|
|
1171
|
|
|
1172 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1173 list = Fcons (coding_category_symbol[coding_category_by_priority[i]],
|
|
|
1174 list);
|
|
|
1175 return list;
|
|
|
1176 }
|
|
|
1177
|
|
|
1178 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
1179 Change the coding system associated with a coding category.
|
|
|
1180 */
|
|
|
1181 (coding_category, coding_system))
|
|
|
1182 {
|
|
|
1183 int cat = decode_coding_category (coding_category);
|
|
|
1184
|
|
|
1185 coding_system = Fget_coding_system (coding_system);
|
|
|
1186 coding_category_system[cat] = coding_system;
|
|
|
1187 return Qnil;
|
|
|
1188 }
|
|
|
1189
|
|
|
1190 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
1191 Return the coding system associated with a coding category.
|
|
|
1192 */
|
|
|
1193 (coding_category))
|
|
|
1194 {
|
|
|
1195 int cat = decode_coding_category (coding_category);
|
|
|
1196 Lisp_Object sys = coding_category_system[cat];
|
|
|
1197
|
|
|
1198 if (!NILP (sys))
|
|
|
1199 return XCODING_SYSTEM_NAME (sys);
|
|
|
1200 return Qnil;
|
|
|
1201 }
|
|
|
1202
|
|
|
1203
|
|
|
1204 /************************************************************************/
|
|
|
1205 /* Detecting the encoding of data */
|
|
|
1206 /************************************************************************/
|
|
|
1207
|
|
|
1208 struct detection_state
|
|
|
1209 {
|
|
179
|
1210 enum eol_type eol_type;
|
|
70
|
1211 int seen_non_ascii;
|
|
|
1212 int mask;
|
|
183
|
1213
|
|
70
|
1214 struct
|
|
|
1215 {
|
|
|
1216 int mask;
|
|
|
1217 int in_second_byte;
|
|
|
1218 }
|
|
|
1219 big5;
|
|
183
|
1220
|
|
70
|
1221 struct
|
|
|
1222 {
|
|
|
1223 int mask;
|
|
|
1224 int in_second_byte;
|
|
|
1225 }
|
|
|
1226 shift_jis;
|
|
183
|
1227
|
|
70
|
1228 struct
|
|
|
1229 {
|
|
|
1230 int mask;
|
|
|
1231 int initted;
|
|
|
1232 struct iso2022_decoder iso;
|
|
|
1233 unsigned int flags;
|
|
|
1234 int high_byte_count;
|
|
74
|
1235 unsigned int saw_single_shift:1;
|
|
70
|
1236 }
|
|
|
1237 iso2022;
|
|
74
|
1238
|
|
70
|
1239 struct
|
|
|
1240 {
|
|
|
1241 int seen_anything;
|
|
|
1242 int just_saw_cr;
|
|
|
1243 }
|
|
|
1244 eol;
|
|
|
1245 };
|
|
|
1246
|
|
|
1247 static int
|
|
|
1248 acceptable_control_char_p (int c)
|
|
|
1249 {
|
|
|
1250 switch (c)
|
|
|
1251 {
|
|
|
1252 /* Allow and ignore control characters that you might
|
|
|
1253 reasonably see in a text file */
|
|
|
1254 case '\r':
|
|
|
1255 case '\n':
|
|
|
1256 case '\t':
|
|
|
1257 case 7: /* bell */
|
|
|
1258 case 8: /* backspace */
|
|
|
1259 case 11: /* vertical tab */
|
|
|
1260 case 12: /* form feed */
|
|
|
1261 case 26: /* MS-DOS C-z junk */
|
|
|
1262 return 1;
|
|
|
1263 default:
|
|
|
1264 return 0;
|
|
|
1265 }
|
|
|
1266 }
|
|
|
1267
|
|
|
1268 static int
|
|
|
1269 mask_has_at_most_one_bit_p (int mask)
|
|
|
1270 {
|
|
|
1271 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
|
1272 technical interviews */
|
|
|
1273 return (mask & (mask - 1)) == 0;
|
|
|
1274 }
|
|
|
1275
|
|
179
|
1276 static enum eol_type
|
|
70
|
1277 detect_eol_type (struct detection_state *st, CONST unsigned char *src,
|
|
|
1278 unsigned int n)
|
|
|
1279 {
|
|
|
1280 int c;
|
|
|
1281
|
|
|
1282 while (n--)
|
|
|
1283 {
|
|
|
1284 c = *src++;
|
|
|
1285 if (c == '\r')
|
|
|
1286 st->eol.just_saw_cr = 1;
|
|
|
1287 else
|
|
|
1288 {
|
|
|
1289 if (c == '\n')
|
|
|
1290 {
|
|
|
1291 if (st->eol.just_saw_cr)
|
|
|
1292 return EOL_CRLF;
|
|
|
1293 else if (st->eol.seen_anything)
|
|
|
1294 return EOL_LF;
|
|
|
1295 }
|
|
|
1296 else if (st->eol.just_saw_cr)
|
|
|
1297 return EOL_CR;
|
|
|
1298 st->eol.just_saw_cr = 0;
|
|
|
1299 }
|
|
|
1300 st->eol.seen_anything = 1;
|
|
|
1301 }
|
|
|
1302
|
|
|
1303 return EOL_AUTODETECT;
|
|
|
1304 }
|
|
|
1305
|
|
|
1306 /* Attempt to determine the encoding and EOL type of the given text.
|
|
|
1307 Before calling this function for the first type, you must initialize
|
|
|
1308 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
|
1309
|
|
|
1310 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
|
1311 not yet known.
|
|
|
1312
|
|
|
1313 st->mask holds the determined coding category mask, or ~0 if only
|
|
|
1314 ASCII has been seen so far.
|
|
183
|
1315
|
|
70
|
1316 Returns:
|
|
|
1317
|
|
|
1318 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
|
1319 is present in st->mask
|
|
|
1320 1 == definitive answers are here for both st->eol_type and st->mask
|
|
|
1321 */
|
|
|
1322
|
|
|
1323 static int
|
|
|
1324 detect_coding_type (struct detection_state *st, CONST unsigned char *src,
|
|
|
1325 unsigned int n, int just_do_eol)
|
|
|
1326 {
|
|
|
1327 int c;
|
|
|
1328
|
|
|
1329 if (st->eol_type == EOL_AUTODETECT)
|
|
|
1330 st->eol_type = detect_eol_type (st, src, n);
|
|
|
1331
|
|
|
1332 if (just_do_eol)
|
|
|
1333 return st->eol_type != EOL_AUTODETECT;
|
|
183
|
1334
|
|
70
|
1335 if (!st->seen_non_ascii)
|
|
|
1336 {
|
|
|
1337 for (; n; n--, src++)
|
|
|
1338 {
|
|
|
1339 c = *src;
|
|
|
1340 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
1341 {
|
|
|
1342 st->seen_non_ascii = 1;
|
|
|
1343 st->shift_jis.mask = ~0;
|
|
|
1344 st->big5.mask = ~0;
|
|
|
1345 st->iso2022.mask = ~0;
|
|
|
1346 break;
|
|
|
1347 }
|
|
|
1348 }
|
|
|
1349 }
|
|
|
1350
|
|
|
1351 if (!n)
|
|
|
1352 return 0;
|
|
|
1353
|
|
|
1354 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
|
1355 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
|
1356 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
74
|
1357 st->shift_jis.mask = detect_coding_sjis (st, src, n);
|
|
70
|
1358 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
|
1359 st->big5.mask = detect_coding_big5 (st, src, n);
|
|
|
1360
|
|
|
1361 st->mask = st->iso2022.mask | st->shift_jis.mask | st->big5.mask;
|
|
|
1362
|
|
|
1363 {
|
|
|
1364 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
|
1365 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
|
1366 return retval && st->eol_type != EOL_AUTODETECT;
|
|
|
1367 }
|
|
|
1368 }
|
|
|
1369
|
|
|
1370 static Lisp_Object
|
|
|
1371 coding_system_from_mask (int mask)
|
|
|
1372 {
|
|
|
1373 if (mask == ~0)
|
|
|
1374 {
|
|
|
1375 /* If the file was entirely or basically ASCII, use the
|
|
110
|
1376 default value of `buffer-file-coding-system'. */
|
|
70
|
1377 Lisp_Object retval =
|
|
110
|
1378 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
70
|
1379 if (!NILP (retval))
|
|
|
1380 {
|
|
|
1381 retval = Ffind_coding_system (retval);
|
|
|
1382 if (NILP (retval))
|
|
|
1383 {
|
|
|
1384 warn_when_safe
|
|
|
1385 (Qbad_variable, Qwarning,
|
|
110
|
1386 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
1387 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
70
|
1388 }
|
|
|
1389 }
|
|
|
1390 if (NILP (retval))
|
|
|
1391 retval = Fget_coding_system (Qno_conversion);
|
|
|
1392 return retval;
|
|
|
1393 }
|
|
|
1394 else
|
|
|
1395 {
|
|
|
1396 int i;
|
|
|
1397 int cat = -1;
|
|
|
1398
|
|
|
1399 mask = postprocess_iso2022_mask (mask);
|
|
183
|
1400
|
|
70
|
1401 /* Look through the coding categories by priority and find
|
|
|
1402 the first one that is allowed. */
|
|
|
1403 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1404 {
|
|
|
1405 cat = coding_category_by_priority[i];
|
|
|
1406 if ((mask & (1 << cat)) &&
|
|
|
1407 !NILP (coding_category_system[cat]))
|
|
|
1408 break;
|
|
|
1409 }
|
|
|
1410 if (cat >= 0)
|
|
|
1411 return coding_category_system[cat];
|
|
|
1412 else
|
|
|
1413 return Fget_coding_system (Qno_conversion);
|
|
|
1414 }
|
|
|
1415 }
|
|
|
1416
|
|
|
1417 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
1418 as specified, do any autodetection that is called for. If the
|
|
|
1419 coding system and/or EOL type are not autodetect, they will be left
|
|
|
1420 alone; but this function will never return an autodetect coding system
|
|
|
1421 or EOL type.
|
|
|
1422
|
|
|
1423 This function does not automatically fetch subsidiary coding systems;
|
|
|
1424 that should be unnecessary with the explicit eol-type argument. */
|
|
|
1425
|
|
|
1426 static void
|
|
|
1427 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
|
179
|
1428 enum eol_type *eol_type_in_out)
|
|
70
|
1429 {
|
|
|
1430 struct detection_state decst;
|
|
|
1431
|
|
|
1432 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1433 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
|
1434
|
|
|
1435 memset (&decst, 0, sizeof (decst));
|
|
|
1436 decst.eol_type = *eol_type_in_out;
|
|
|
1437 decst.mask = ~0;
|
|
183
|
1438
|
|
70
|
1439 /* If autodetection is called for, do it now. */
|
|
|
1440 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT ||
|
|
|
1441 *eol_type_in_out == EOL_AUTODETECT)
|
|
|
1442 {
|
|
|
1443
|
|
|
1444 while (1)
|
|
|
1445 {
|
|
|
1446 unsigned char random_buffer[4096];
|
|
|
1447 int nread;
|
|
183
|
1448
|
|
70
|
1449 nread = Lstream_read (stream, random_buffer, sizeof (random_buffer));
|
|
|
1450 if (!nread)
|
|
|
1451 break;
|
|
|
1452 if (detect_coding_type (&decst, random_buffer, nread,
|
|
|
1453 XCODING_SYSTEM_TYPE (*codesys_in_out) !=
|
|
|
1454 CODESYS_AUTODETECT))
|
|
|
1455 break;
|
|
|
1456 }
|
|
|
1457
|
|
|
1458 *eol_type_in_out = decst.eol_type;
|
|
|
1459 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
|
|
1460 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
|
1461 }
|
|
|
1462
|
|
|
1463 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
|
1464 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1465 *eol_type_in_out = EOL_LF;
|
|
|
1466
|
|
|
1467 Lstream_rewind (stream);
|
|
|
1468 }
|
|
|
1469
|
|
|
1470 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
1471 Detect coding system of the text in the region between START and END.
|
|
120
|
1472 Returned value is a list of possible coding systems ordered by
|
|
|
1473 priority. If only ASCII characters are found, it returns
|
|
|
1474 'automatic-conversion or one of its subsidiary coding systems
|
|
|
1475 according to a detected end-of-line type. Optional arg BUFFER
|
|
|
1476 defaults to the current buffer.
|
|
70
|
1477 */
|
|
|
1478 (start, end, buffer))
|
|
|
1479 {
|
|
|
1480 Lisp_Object val = Qnil;
|
|
|
1481 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1482 Bufpos b, e;
|
|
|
1483 Lisp_Object instream;
|
|
|
1484 struct detection_state decst;
|
|
|
1485
|
|
|
1486 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
1487 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1488 instream = make_encoding_input_stream (XLSTREAM (instream),
|
|
|
1489 Fget_coding_system (Qbinary));
|
|
|
1490 memset (&decst, 0, sizeof (decst));
|
|
|
1491 decst.eol_type = EOL_AUTODETECT;
|
|
|
1492 decst.mask = ~0;
|
|
|
1493 while (1)
|
|
|
1494 {
|
|
|
1495 unsigned char random_buffer[4096];
|
|
|
1496 int nread;
|
|
183
|
1497
|
|
70
|
1498 nread = Lstream_read (XLSTREAM (instream), random_buffer,
|
|
|
1499 sizeof (random_buffer));
|
|
|
1500 if (!nread)
|
|
|
1501 break;
|
|
|
1502 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
|
1503 break;
|
|
|
1504 }
|
|
|
1505
|
|
|
1506 if (decst.mask == ~0)
|
|
179
|
1507 val = subsidiary_coding_system (Fget_coding_system (Qautomatic_conversion),
|
|
|
1508 decst.eol_type);
|
|
70
|
1509 else
|
|
|
1510 {
|
|
|
1511 int i;
|
|
183
|
1512
|
|
70
|
1513 val = Qnil;
|
|
|
1514
|
|
|
1515 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
183
|
1516
|
|
70
|
1517 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1518 {
|
|
|
1519 int sys = coding_category_by_priority[i];
|
|
|
1520 if (decst.mask & (1 << sys))
|
|
|
1521 {
|
|
|
1522 Lisp_Object codesys = coding_category_system[sys];
|
|
|
1523 if (!NILP (codesys))
|
|
|
1524 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
|
1525 val = Fcons (codesys, val);
|
|
|
1526 }
|
|
|
1527 }
|
|
|
1528 }
|
|
|
1529 return val;
|
|
|
1530 }
|
|
|
1531
|
|
|
1532
|
|
|
1533 /************************************************************************/
|
|
|
1534 /* Converting to internal Mule format ("decoding") */
|
|
|
1535 /************************************************************************/
|
|
|
1536
|
|
|
1537 /* A decoding stream is a stream used for decoding text (i.e.
|
|
|
1538 converting from some external format to internal format).
|
|
|
1539 The decoding-stream object keeps track of the actual coding
|
|
|
1540 stream, the stream that is at the other end, and data that
|
|
|
1541 needs to be persistent across the lifetime of the stream. */
|
|
|
1542
|
|
181
|
1543 /* Handle the EOL stuff related to just-read-in character C.
|
|
|
1544 EOL_TYPE is the EOL type of the coding stream.
|
|
|
1545 FLAGS is the current value of FLAGS in the coding stream, and may
|
|
|
1546 be modified by this macro. (The macro only looks at the
|
|
|
1547 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
|
|
|
1548 bytes are to be written. You need to also define a local goto
|
|
|
1549 label "label_continue_loop" that is at the end of the main
|
|
|
1550 character-reading loop.
|
|
70
|
1551
|
|
|
1552 If C is a CR character, then this macro handles it entirely and
|
|
|
1553 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
|
1554 anything to DST, and continues normally. You should continue
|
|
|
1555 processing C normally after this macro. */
|
|
|
1556
|
|
181
|
1557 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
|
|
70
|
1558 do { \
|
|
|
1559 if (c == '\r') \
|
|
|
1560 { \
|
|
181
|
1561 if (eol_type == EOL_CR) \
|
|
70
|
1562 Dynarr_add (dst, '\n'); \
|
|
181
|
1563 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
70
|
1564 Dynarr_add (dst, c); \
|
|
|
1565 else \
|
|
|
1566 flags |= CODING_STATE_CR; \
|
|
|
1567 goto label_continue_loop; \
|
|
|
1568 } \
|
|
|
1569 else if (flags & CODING_STATE_CR) \
|
|
181
|
1570 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
|
|
70
|
1571 if (c != '\n') \
|
|
|
1572 Dynarr_add (dst, '\r'); \
|
|
|
1573 flags &= ~CODING_STATE_CR; \
|
|
|
1574 } \
|
|
|
1575 } while (0)
|
|
|
1576
|
|
|
1577 /* C should be a binary character in the range 0 - 255; convert
|
|
|
1578 to internal format and add to Dynarr DST. */
|
|
|
1579
|
|
|
1580 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
|
1581 do { \
|
|
|
1582 if (BYTE_ASCII_P (c)) \
|
|
|
1583 Dynarr_add (dst, c); \
|
|
|
1584 else if (BYTE_C1_P (c)) \
|
|
|
1585 { \
|
|
|
1586 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
|
1587 Dynarr_add (dst, c + 0x20); \
|
|
|
1588 } \
|
|
|
1589 else \
|
|
|
1590 { \
|
|
74
|
1591 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
|
|
70
|
1592 Dynarr_add (dst, c); \
|
|
|
1593 } \
|
|
|
1594 } while (0)
|
|
|
1595
|
|
|
1596 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
|
1597 do { \
|
|
|
1598 if (ch) \
|
|
|
1599 { \
|
|
|
1600 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
|
1601 ch = 0; \
|
|
|
1602 } \
|
|
|
1603 } while (0)
|
|
|
1604
|
|
74
|
1605 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
|
|
|
1606 do { \
|
|
|
1607 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
|
1608 if ((flags & CODING_STATE_END) && \
|
|
|
1609 (flags & CODING_STATE_CR)) \
|
|
|
1610 Dynarr_add (dst, '\r'); \
|
|
70
|
1611 } while (0)
|
|
|
1612
|
|
|
1613 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
|
1614
|
|
|
1615 struct decoding_stream
|
|
|
1616 {
|
|
|
1617 /* Coding system that governs the conversion. */
|
|
|
1618 struct Lisp_Coding_System *codesys;
|
|
|
1619
|
|
|
1620 /* Stream that we read the encoded data from or
|
|
|
1621 write the decoded data to. */
|
|
|
1622 Lstream *other_end;
|
|
|
1623
|
|
|
1624 /* If we are reading, then we can return only a fixed amount of
|
|
|
1625 data, so if the conversion resulted in too much data, we store it
|
|
|
1626 here for retrieval the next time around. */
|
|
|
1627 unsigned_char_dynarr *runoff;
|
|
|
1628
|
|
|
1629 /* FLAGS holds flags indicating the current state of the decoding.
|
|
|
1630 Some of these flags are dependent on the coding system. */
|
|
|
1631 unsigned int flags;
|
|
|
1632
|
|
|
1633 /* CH holds a partially built-up character. Since we only deal
|
|
|
1634 with one- and two-byte characters at the moment, we only use
|
|
|
1635 this to store the first byte of a two-byte character. */
|
|
|
1636 unsigned int ch;
|
|
|
1637
|
|
|
1638 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
|
1639 currently applies. We need to keep this separate from the
|
|
|
1640 EOL type stored in CODESYS because the latter might indicate
|
|
|
1641 automatic EOL-type detection while the former will always
|
|
|
1642 indicate a particular EOL type. */
|
|
179
|
1643 enum eol_type eol_type;
|
|
70
|
1644
|
|
|
1645 /* Additional ISO2022 information. We define the structure above
|
|
|
1646 because it's also needed by the detection routines. */
|
|
|
1647 struct iso2022_decoder iso2022;
|
|
183
|
1648
|
|
70
|
1649 /* Additional information (the state of the running CCL program)
|
|
|
1650 used by the CCL decoder. */
|
|
|
1651 struct ccl_program ccl;
|
|
|
1652
|
|
|
1653 struct detection_state decst;
|
|
|
1654 };
|
|
|
1655
|
|
|
1656 static int decoding_reader (Lstream *stream, unsigned char *data, int size);
|
|
|
1657 static int decoding_writer (Lstream *stream, CONST unsigned char *data, int size);
|
|
|
1658 static int decoding_rewinder (Lstream *stream);
|
|
|
1659 static int decoding_seekable_p (Lstream *stream);
|
|
|
1660 static int decoding_flusher (Lstream *stream);
|
|
|
1661 static int decoding_closer (Lstream *stream);
|
|
|
1662 static Lisp_Object decoding_marker (Lisp_Object stream,
|
|
|
1663 void (*markobj) (Lisp_Object));
|
|
|
1664
|
|
|
1665 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
|
1666 sizeof (struct decoding_stream));
|
|
|
1667
|
|
|
1668 static Lisp_Object
|
|
|
1669 decoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
|
1670 {
|
|
|
1671 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
1672 Lisp_Object str_obj;
|
|
|
1673
|
|
|
1674 /* We do not need to mark the coding systems or charsets stored
|
|
|
1675 within the stream because they are stored in a global list
|
|
|
1676 and automatically marked. */
|
|
|
1677
|
|
|
1678 XSETLSTREAM (str_obj, str);
|
|
|
1679 (markobj) (str_obj);
|
|
|
1680 if (str->imp->marker)
|
|
|
1681 return (str->imp->marker) (str_obj, markobj);
|
|
|
1682 else
|
|
|
1683 return Qnil;
|
|
|
1684 }
|
|
|
1685
|
|
|
1686 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
|
1687 so we read data from the other end, decode it, and store it into DATA. */
|
|
|
1688
|
|
|
1689 static int
|
|
|
1690 decoding_reader (Lstream *stream, unsigned char *data, int size)
|
|
|
1691 {
|
|
|
1692 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1693 unsigned char *orig_data = data;
|
|
|
1694 int read_size;
|
|
|
1695 int error_occurred = 0;
|
|
|
1696
|
|
|
1697 /* We need to interface to mule_decode(), which expects to take some
|
|
|
1698 amount of data and store the result into a Dynarr. We have
|
|
|
1699 mule_decode() store into str->runoff, and take data from there
|
|
|
1700 as necessary. */
|
|
|
1701
|
|
|
1702 /* We loop until we have enough data, reading chunks from the other
|
|
|
1703 end and decoding it. */
|
|
|
1704 while (1)
|
|
|
1705 {
|
|
|
1706 /* Take data from the runoff if we can. Make sure to take at
|
|
|
1707 most SIZE bytes, and delete the data from the runoff. */
|
|
|
1708 if (Dynarr_length (str->runoff) > 0)
|
|
|
1709 {
|
|
|
1710 int chunk = min (size, Dynarr_length (str->runoff));
|
|
|
1711 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
1712 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
1713 data += chunk;
|
|
|
1714 size -= chunk;
|
|
|
1715 }
|
|
|
1716
|
|
|
1717 if (size == 0)
|
|
|
1718 break; /* No more room for data */
|
|
|
1719
|
|
|
1720 if (str->flags & CODING_STATE_END)
|
|
|
1721 /* This means that on the previous iteration, we hit the EOF on
|
|
|
1722 the other end. We loop once more so that mule_decode() can
|
|
|
1723 output any final stuff it may be holding, or any "go back
|
|
|
1724 to a sane state" escape sequences. (This latter makes sense
|
|
|
1725 during encoding.) */
|
|
|
1726 break;
|
|
|
1727
|
|
|
1728 /* Exhausted the runoff, so get some more. DATA has at least
|
|
|
1729 SIZE bytes left of storage in it, so it's OK to read directly
|
|
|
1730 into it. (We'll be overwriting above, after we've decoded it
|
|
|
1731 into the runoff.) */
|
|
|
1732 read_size = Lstream_read (str->other_end, data, size);
|
|
|
1733 if (read_size < 0)
|
|
|
1734 {
|
|
|
1735 error_occurred = 1;
|
|
|
1736 break;
|
|
|
1737 }
|
|
|
1738 if (read_size == 0)
|
|
|
1739 /* There might be some more end data produced in the translation.
|
|
|
1740 See the comment above. */
|
|
|
1741 str->flags |= CODING_STATE_END;
|
|
|
1742 mule_decode (stream, data, str->runoff, read_size);
|
|
|
1743 }
|
|
|
1744
|
|
|
1745 if (data - orig_data == 0)
|
|
|
1746 return error_occurred ? -1 : 0;
|
|
|
1747 else
|
|
|
1748 return data - orig_data;
|
|
|
1749 }
|
|
|
1750
|
|
|
1751 static int
|
|
|
1752 decoding_writer (Lstream *stream, CONST unsigned char *data, int size)
|
|
|
1753 {
|
|
|
1754 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1755 int retval;
|
|
|
1756
|
|
|
1757 /* Decode all our data into the runoff, and then attempt to write
|
|
|
1758 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
1759 in writing. */
|
|
|
1760 mule_decode (stream, data, str->runoff, size);
|
|
|
1761 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
1762 Dynarr_length (str->runoff));
|
|
|
1763 if (retval > 0)
|
|
|
1764 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
1765 /* Do NOT return retval. The return value indicates how much
|
|
|
1766 of the incoming data was written, not how many bytes were
|
|
|
1767 written. */
|
|
|
1768 return size;
|
|
|
1769 }
|
|
|
1770
|
|
|
1771 static void
|
|
|
1772 reset_decoding_stream (struct decoding_stream *str)
|
|
|
1773 {
|
|
|
1774 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
1775 {
|
|
|
1776 Lisp_Object coding_system = Qnil;
|
|
|
1777 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
1778 reset_iso2022 (coding_system, &str->iso2022);
|
|
|
1779 }
|
|
|
1780 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
1781 {
|
|
|
1782 set_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys),
|
|
|
1783 0, 0, 0);
|
|
|
1784 }
|
|
183
|
1785
|
|
70
|
1786 str->flags = str->ch = 0;
|
|
|
1787 }
|
|
|
1788
|
|
|
1789 static int
|
|
|
1790 decoding_rewinder (Lstream *stream)
|
|
|
1791 {
|
|
|
1792 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1793 reset_decoding_stream (str);
|
|
|
1794 Dynarr_reset (str->runoff);
|
|
|
1795 return Lstream_rewind (str->other_end);
|
|
|
1796 }
|
|
|
1797
|
|
|
1798 static int
|
|
|
1799 decoding_seekable_p (Lstream *stream)
|
|
|
1800 {
|
|
|
1801 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1802 return Lstream_seekable_p (str->other_end);
|
|
|
1803 }
|
|
|
1804
|
|
|
1805 static int
|
|
|
1806 decoding_flusher (Lstream *stream)
|
|
|
1807 {
|
|
|
1808 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1809 return Lstream_flush (str->other_end);
|
|
|
1810 }
|
|
|
1811
|
|
|
1812 static int
|
|
|
1813 decoding_closer (Lstream *stream)
|
|
|
1814 {
|
|
|
1815 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1816 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
1817 {
|
|
|
1818 str->flags |= CODING_STATE_END;
|
|
|
1819 decoding_writer (stream, 0, 0);
|
|
|
1820 }
|
|
|
1821 Dynarr_free (str->runoff);
|
|
|
1822 if (str->iso2022.composite_chars)
|
|
|
1823 Dynarr_free (str->iso2022.composite_chars);
|
|
|
1824 return Lstream_close (str->other_end);
|
|
|
1825 }
|
|
|
1826
|
|
|
1827 Lisp_Object
|
|
|
1828 decoding_stream_coding_system (Lstream *stream)
|
|
|
1829 {
|
|
|
1830 Lisp_Object coding_system = Qnil;
|
|
|
1831 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
1832
|
|
|
1833 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
1834 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
|
1835 }
|
|
|
1836
|
|
|
1837 void
|
|
|
1838 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
1839 {
|
|
|
1840 struct Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
1841 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
1842 str->codesys = cs;
|
|
|
1843 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
1844 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
|
1845 reset_decoding_stream (str);
|
|
|
1846 }
|
|
|
1847
|
|
|
1848 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
|
1849 stream for writing, no automatic code detection will be performed.
|
|
|
1850 The reason for this is that automatic code detection requires a
|
|
|
1851 seekable input. Things will also fail if you open a decoding
|
|
|
1852 stream for reading using a non-fully-specified coding system and
|
|
|
1853 a non-seekable input stream. */
|
|
|
1854
|
|
|
1855 static Lisp_Object
|
|
|
1856 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
1857 CONST char *mode)
|
|
|
1858 {
|
|
|
1859 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
|
1860 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
1861 Lisp_Object obj;
|
|
|
1862
|
|
|
1863 memset (str, 0, sizeof (*str));
|
|
|
1864 str->other_end = stream;
|
|
|
1865 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned char);
|
|
|
1866 str->eol_type = EOL_AUTODETECT;
|
|
|
1867 if (!strcmp (mode, "r")
|
|
|
1868 && Lstream_seekable_p (stream))
|
|
|
1869 /* We can determine the coding system now. */
|
|
|
1870 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
|
1871 set_decoding_stream_coding_system (lstr, codesys);
|
|
|
1872 str->decst.eol_type = str->eol_type;
|
|
|
1873 str->decst.mask = ~0;
|
|
|
1874 XSETLSTREAM (obj, lstr);
|
|
|
1875 return obj;
|
|
|
1876 }
|
|
|
1877
|
|
|
1878 Lisp_Object
|
|
|
1879 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
1880 {
|
|
|
1881 return make_decoding_stream_1 (stream, codesys, "r");
|
|
|
1882 }
|
|
|
1883
|
|
|
1884 Lisp_Object
|
|
|
1885 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
1886 {
|
|
|
1887 return make_decoding_stream_1 (stream, codesys, "w");
|
|
|
1888 }
|
|
|
1889
|
|
181
|
1890 /* Note: the decode_coding_* functions all take the same
|
|
70
|
1891 arguments as mule_decode(), which is to say some SRC data of
|
|
|
1892 size N, which is to be stored into dynamic array DST.
|
|
|
1893 DECODING is the stream within which the decoding is
|
|
|
1894 taking place, but no data is actually read from or
|
|
|
1895 written to that stream; that is handled in decoding_reader()
|
|
|
1896 or decoding_writer(). This allows the same functions to
|
|
|
1897 be used for both reading and writing. */
|
|
|
1898
|
|
|
1899 static void
|
|
|
1900 mule_decode (Lstream *decoding, CONST unsigned char *src,
|
|
|
1901 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
1902 {
|
|
|
1903 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
1904
|
|
|
1905 /* If necessary, do encoding-detection now. We do this when
|
|
|
1906 we're a writing stream or a non-seekable reading stream,
|
|
|
1907 meaning that we can't just process the whole input,
|
|
|
1908 rewind, and start over. */
|
|
183
|
1909
|
|
70
|
1910 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
|
1911 str->eol_type == EOL_AUTODETECT)
|
|
|
1912 {
|
|
|
1913 Lisp_Object codesys = Qnil;
|
|
|
1914
|
|
|
1915 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
|
1916 detect_coding_type (&str->decst, src, n,
|
|
|
1917 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
|
1918 CODESYS_AUTODETECT);
|
|
|
1919 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
|
1920 str->decst.mask != ~0)
|
|
|
1921 /* #### This is cheesy. What we really ought to do is
|
|
|
1922 buffer up a certain amount of data so as to get a
|
|
|
1923 less random result. */
|
|
|
1924 codesys = coding_system_from_mask (str->decst.mask);
|
|
|
1925 str->eol_type = str->decst.eol_type;
|
|
|
1926 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
|
1927 {
|
|
|
1928 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
|
1929 If we erase it, bad things might happen. */
|
|
|
1930 int was_end = str->flags & CODING_STATE_END;
|
|
|
1931 set_decoding_stream_coding_system (decoding, codesys);
|
|
|
1932 if (was_end)
|
|
|
1933 str->flags |= CODING_STATE_END;
|
|
|
1934 }
|
|
|
1935 }
|
|
183
|
1936
|
|
70
|
1937 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
1938 {
|
|
|
1939 #ifdef DEBUG_XEMACS
|
|
|
1940 case CODESYS_INTERNAL:
|
|
|
1941 Dynarr_add_many (dst, src, n);
|
|
|
1942 break;
|
|
|
1943 #endif
|
|
|
1944 case CODESYS_AUTODETECT:
|
|
|
1945 /* If we got this far and still haven't decided on the coding
|
|
|
1946 system, then do no conversion. */
|
|
|
1947 case CODESYS_NO_CONVERSION:
|
|
|
1948 decode_coding_no_conversion (decoding, src, dst, n);
|
|
|
1949 break;
|
|
|
1950 case CODESYS_SHIFT_JIS:
|
|
74
|
1951 decode_coding_sjis (decoding, src, dst, n);
|
|
70
|
1952 break;
|
|
|
1953 case CODESYS_BIG5:
|
|
|
1954 decode_coding_big5 (decoding, src, dst, n);
|
|
|
1955 break;
|
|
|
1956 case CODESYS_CCL:
|
|
|
1957 ccl_driver (&str->ccl, src, dst, n, (str->flags) & CODING_STATE_END);
|
|
|
1958 break;
|
|
|
1959 case CODESYS_ISO2022:
|
|
|
1960 decode_coding_iso2022 (decoding, src, dst, n);
|
|
|
1961 break;
|
|
|
1962 default:
|
|
|
1963 abort ();
|
|
|
1964 }
|
|
|
1965 }
|
|
|
1966
|
|
|
1967 static Lisp_Object
|
|
|
1968 close_both_streams (Lisp_Object cons)
|
|
|
1969 {
|
|
|
1970 Lisp_Object instream = XCAR (cons);
|
|
|
1971 Lisp_Object outstream = XCDR (cons);
|
|
|
1972 Lstream_close (XLSTREAM (outstream));
|
|
|
1973 Lstream_close (XLSTREAM (instream));
|
|
|
1974 return Qnil;
|
|
|
1975 }
|
|
|
1976
|
|
|
1977 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
1978 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
1979 This is useful if you've read in encoded text from a file without decoding
|
|
|
1980 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
1981 `no-conversion' coding system, so that it shows up as \"^[$B!<!+^[(B\").
|
|
|
1982 Return length of decoded text.
|
|
|
1983 BUFFER defaults to the current buffer if unspecified.
|
|
|
1984 */
|
|
|
1985 (start, end, coding_system, buffer))
|
|
|
1986 {
|
|
|
1987 Bufpos b, e;
|
|
|
1988 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1989 Lisp_Object instream, outstream;
|
|
|
1990 int speccount = specpdl_depth ();
|
|
|
1991 struct gcpro gcpro1, gcpro2;
|
|
|
1992
|
|
|
1993 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
96
|
1994
|
|
|
1995 barf_if_buffer_read_only (buf, b, e);
|
|
|
1996
|
|
70
|
1997 coding_system = Fget_coding_system (coding_system);
|
|
74
|
1998 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
70
|
1999 outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2000 outstream = make_decoding_output_stream (XLSTREAM (outstream),
|
|
|
2001 coding_system);
|
|
|
2002 outstream = make_encoding_output_stream (XLSTREAM (outstream),
|
|
|
2003 Fget_coding_system (Qbinary));
|
|
|
2004 GCPRO2 (instream, outstream);
|
|
|
2005 record_unwind_protect (close_both_streams, Fcons (instream, outstream));
|
|
|
2006
|
|
|
2007 /* The chain of streams looks like this:
|
|
|
2008
|
|
|
2009 [BUFFER] <----- send through
|
|
|
2010 ------> [ENCODE AS BINARY]
|
|
|
2011 ------> [DECODE AS SPECIFIED]
|
|
|
2012 ------> [BUFFER]
|
|
|
2013 */
|
|
|
2014
|
|
|
2015 {
|
|
|
2016 char tempbuf[1024]; /* some random amount */
|
|
|
2017 Lstream *in = XLSTREAM(instream);
|
|
|
2018 Lstream *out = XLSTREAM(outstream);
|
|
|
2019 Bufpos newpos, even_newer_pos;
|
|
183
|
2020
|
|
70
|
2021 while (1)
|
|
|
2022 {
|
|
|
2023 Bufpos oldpos = lisp_buffer_stream_startpos (in);
|
|
|
2024 int size_in_bytes = Lstream_read (in, tempbuf, sizeof (tempbuf));
|
|
|
2025 if (!size_in_bytes)
|
|
|
2026 break;
|
|
|
2027 newpos = lisp_buffer_stream_startpos (in);
|
|
|
2028 Lstream_write (out, tempbuf, size_in_bytes);
|
|
|
2029 even_newer_pos = lisp_buffer_stream_startpos (in);
|
|
|
2030 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2031 even_newer_pos, 0);
|
|
|
2032 }
|
|
|
2033 }
|
|
|
2034
|
|
|
2035 unbind_to (speccount, Qnil);
|
|
|
2036 UNGCPRO;
|
|
|
2037 return Qnil;
|
|
|
2038 }
|
|
|
2039
|
|
|
2040
|
|
|
2041 /************************************************************************/
|
|
|
2042 /* Converting to an external encoding ("encoding") */
|
|
|
2043 /************************************************************************/
|
|
|
2044
|
|
|
2045 /* An encoding stream is an output stream. When you create the
|
|
|
2046 stream, you specify the coding system that governs the encoding
|
|
|
2047 and another stream that the resulting encoded data is to be
|
|
|
2048 sent to, and then start sending data to it. */
|
|
|
2049
|
|
|
2050 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
|
2051
|
|
|
2052 struct encoding_stream
|
|
|
2053 {
|
|
|
2054 /* Coding system that governs the conversion. */
|
|
|
2055 struct Lisp_Coding_System *codesys;
|
|
|
2056
|
|
|
2057 /* Stream that we read the encoded data from or
|
|
|
2058 write the decoded data to. */
|
|
|
2059 Lstream *other_end;
|
|
|
2060
|
|
|
2061 /* If we are reading, then we can return only a fixed amount of
|
|
|
2062 data, so if the conversion resulted in too much data, we store it
|
|
|
2063 here for retrieval the next time around. */
|
|
|
2064 unsigned_char_dynarr *runoff;
|
|
|
2065
|
|
|
2066 /* FLAGS holds flags indicating the current state of the encoding.
|
|
|
2067 Some of these flags are dependent on the coding system. */
|
|
|
2068 unsigned int flags;
|
|
|
2069
|
|
|
2070 /* CH holds a partially built-up character. Since we only deal
|
|
|
2071 with one- and two-byte characters at the moment, we only use
|
|
|
2072 this to store the first byte of a two-byte character. */
|
|
|
2073 unsigned int ch;
|
|
|
2074
|
|
|
2075 /* Additional information used by the ISO2022 encoder. */
|
|
|
2076 struct
|
|
|
2077 {
|
|
|
2078 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
2079 through G3 registers. It is initialized from the array
|
|
|
2080 INITIAL_CHARSET in CODESYS. */
|
|
|
2081 Lisp_Object charset[4];
|
|
|
2082
|
|
|
2083 /* Which registers are currently invoked into the left (GL) and
|
|
|
2084 right (GR) halves of the 8-bit encoding space? */
|
|
|
2085 int register_left, register_right;
|
|
|
2086
|
|
|
2087 /* Whether we need to explicitly designate the charset in the
|
|
|
2088 G? register before using it. It is initialized from the
|
|
|
2089 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
|
2090 unsigned char force_charset_on_output[4];
|
|
|
2091
|
|
|
2092 /* Other state variables that need to be preserved across
|
|
|
2093 invocations. */
|
|
|
2094 Lisp_Object current_charset;
|
|
|
2095 int current_half;
|
|
|
2096 int current_char_boundary;
|
|
|
2097 } iso2022;
|
|
|
2098
|
|
|
2099 /* Additional information (the state of the running CCL program)
|
|
|
2100 used by the CCL encoder. */
|
|
|
2101 struct ccl_program ccl;
|
|
|
2102 };
|
|
|
2103
|
|
|
2104 static int encoding_reader (Lstream *stream, unsigned char *data, int size);
|
|
|
2105 static int encoding_writer (Lstream *stream, CONST unsigned char *data,
|
|
|
2106 int size);
|
|
|
2107 static int encoding_rewinder (Lstream *stream);
|
|
|
2108 static int encoding_seekable_p (Lstream *stream);
|
|
|
2109 static int encoding_flusher (Lstream *stream);
|
|
|
2110 static int encoding_closer (Lstream *stream);
|
|
|
2111 static Lisp_Object encoding_marker (Lisp_Object stream,
|
|
|
2112 void (*markobj) (Lisp_Object));
|
|
|
2113
|
|
|
2114 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
|
2115 sizeof (struct encoding_stream));
|
|
|
2116
|
|
|
2117 static Lisp_Object
|
|
|
2118 encoding_marker (Lisp_Object stream, void (*markobj) (Lisp_Object))
|
|
|
2119 {
|
|
|
2120 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2121 Lisp_Object str_obj;
|
|
|
2122
|
|
|
2123 /* We do not need to mark the coding systems or charsets stored
|
|
|
2124 within the stream because they are stored in a global list
|
|
|
2125 and automatically marked. */
|
|
|
2126
|
|
|
2127 XSETLSTREAM (str_obj, str);
|
|
|
2128 (markobj) (str_obj);
|
|
|
2129 if (str->imp->marker)
|
|
|
2130 return (str->imp->marker) (str_obj, markobj);
|
|
|
2131 else
|
|
|
2132 return Qnil;
|
|
|
2133 }
|
|
|
2134
|
|
|
2135 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
|
2136 so we read data from the other end, encode it, and store it into DATA. */
|
|
|
2137
|
|
|
2138 static int
|
|
|
2139 encoding_reader (Lstream *stream, unsigned char *data, int size)
|
|
|
2140 {
|
|
|
2141 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2142 unsigned char *orig_data = data;
|
|
|
2143 int read_size;
|
|
|
2144 int error_occurred = 0;
|
|
|
2145
|
|
|
2146 /* We need to interface to mule_encode(), which expects to take some
|
|
|
2147 amount of data and store the result into a Dynarr. We have
|
|
|
2148 mule_encode() store into str->runoff, and take data from there
|
|
|
2149 as necessary. */
|
|
|
2150
|
|
|
2151 /* We loop until we have enough data, reading chunks from the other
|
|
|
2152 end and encoding it. */
|
|
|
2153 while (1)
|
|
|
2154 {
|
|
|
2155 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2156 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2157 if (Dynarr_length (str->runoff) > 0)
|
|
|
2158 {
|
|
|
2159 int chunk = min (size, Dynarr_length (str->runoff));
|
|
|
2160 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2161 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2162 data += chunk;
|
|
|
2163 size -= chunk;
|
|
|
2164 }
|
|
|
2165
|
|
|
2166 if (size == 0)
|
|
|
2167 break; /* No more room for data */
|
|
|
2168
|
|
|
2169 if (str->flags & CODING_STATE_END)
|
|
|
2170 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2171 the other end. We loop once more so that mule_encode() can
|
|
|
2172 output any final stuff it may be holding, or any "go back
|
|
|
2173 to a sane state" escape sequences. (This latter makes sense
|
|
|
2174 during encoding.) */
|
|
|
2175 break;
|
|
|
2176
|
|
|
2177 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
|
2178 left of storage in it, so it's OK to read directly into it.
|
|
|
2179 (We'll be overwriting above, after we've encoded it into the
|
|
|
2180 runoff.) */
|
|
|
2181 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2182 if (read_size < 0)
|
|
|
2183 {
|
|
|
2184 error_occurred = 1;
|
|
|
2185 break;
|
|
|
2186 }
|
|
|
2187 if (read_size == 0)
|
|
|
2188 /* There might be some more end data produced in the translation.
|
|
|
2189 See the comment above. */
|
|
|
2190 str->flags |= CODING_STATE_END;
|
|
|
2191 mule_encode (stream, data, str->runoff, read_size);
|
|
|
2192 }
|
|
|
2193
|
|
181
|
2194 if (data == orig_data)
|
|
70
|
2195 return error_occurred ? -1 : 0;
|
|
|
2196 else
|
|
|
2197 return data - orig_data;
|
|
|
2198 }
|
|
|
2199
|
|
|
2200 static int
|
|
|
2201 encoding_writer (Lstream *stream, CONST unsigned char *data, int size)
|
|
|
2202 {
|
|
|
2203 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2204 int retval;
|
|
|
2205
|
|
|
2206 /* Encode all our data into the runoff, and then attempt to write
|
|
|
2207 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2208 in writing. */
|
|
|
2209 mule_encode (stream, data, str->runoff, size);
|
|
|
2210 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2211 Dynarr_length (str->runoff));
|
|
|
2212 if (retval > 0)
|
|
|
2213 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2214 /* Do NOT return retval. The return value indicates how much
|
|
|
2215 of the incoming data was written, not how many bytes were
|
|
|
2216 written. */
|
|
|
2217 return size;
|
|
|
2218 }
|
|
|
2219
|
|
|
2220 static void
|
|
|
2221 reset_encoding_stream (struct encoding_stream *str)
|
|
|
2222 {
|
|
181
|
2223 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
70
|
2224 {
|
|
181
|
2225 case CODESYS_ISO2022:
|
|
|
2226 {
|
|
|
2227 int i;
|
|
|
2228
|
|
|
2229 for (i = 0; i < 4; i++)
|
|
|
2230 {
|
|
|
2231 str->iso2022.charset[i] =
|
|
|
2232 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
|
2233 str->iso2022.force_charset_on_output[i] =
|
|
|
2234 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
|
2235 }
|
|
|
2236 str->iso2022.register_left = 0;
|
|
|
2237 str->iso2022.register_right = 1;
|
|
|
2238 str->iso2022.current_charset = Qnil;
|
|
|
2239 str->iso2022.current_half = 0;
|
|
|
2240 str->iso2022.current_char_boundary = 1;
|
|
|
2241 break;
|
|
|
2242 }
|
|
|
2243 case CODESYS_CCL:
|
|
|
2244 set_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys), 0, 0, 0);
|
|
|
2245 break;
|
|
|
2246 default:
|
|
|
2247 break;
|
|
70
|
2248 }
|
|
183
|
2249
|
|
70
|
2250 str->flags = str->ch = 0;
|
|
|
2251 }
|
|
|
2252
|
|
|
2253 static int
|
|
|
2254 encoding_rewinder (Lstream *stream)
|
|
|
2255 {
|
|
|
2256 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2257 reset_encoding_stream (str);
|
|
|
2258 Dynarr_reset (str->runoff);
|
|
|
2259 return Lstream_rewind (str->other_end);
|
|
|
2260 }
|
|
|
2261
|
|
|
2262 static int
|
|
|
2263 encoding_seekable_p (Lstream *stream)
|
|
|
2264 {
|
|
|
2265 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2266 return Lstream_seekable_p (str->other_end);
|
|
|
2267 }
|
|
|
2268
|
|
|
2269 static int
|
|
|
2270 encoding_flusher (Lstream *stream)
|
|
|
2271 {
|
|
|
2272 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2273 return Lstream_flush (str->other_end);
|
|
|
2274 }
|
|
|
2275
|
|
|
2276 static int
|
|
|
2277 encoding_closer (Lstream *stream)
|
|
|
2278 {
|
|
|
2279 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2280 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2281 {
|
|
|
2282 str->flags |= CODING_STATE_END;
|
|
|
2283 encoding_writer (stream, 0, 0);
|
|
|
2284 }
|
|
|
2285 Dynarr_free (str->runoff);
|
|
|
2286 return Lstream_close (str->other_end);
|
|
|
2287 }
|
|
|
2288
|
|
|
2289 Lisp_Object
|
|
|
2290 encoding_stream_coding_system (Lstream *stream)
|
|
|
2291 {
|
|
|
2292 Lisp_Object coding_system = Qnil;
|
|
|
2293 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2294
|
|
|
2295 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2296 return coding_system;
|
|
|
2297 }
|
|
|
2298
|
|
|
2299 void
|
|
|
2300 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2301 {
|
|
|
2302 struct Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
2303 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2304 str->codesys = cs;
|
|
|
2305 reset_encoding_stream (str);
|
|
|
2306 }
|
|
|
2307
|
|
|
2308 static Lisp_Object
|
|
|
2309 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
2310 CONST char *mode)
|
|
|
2311 {
|
|
|
2312 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
|
2313 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2314 Lisp_Object obj;
|
|
|
2315
|
|
|
2316 memset (str, 0, sizeof (*str));
|
|
|
2317 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned char);
|
|
|
2318 str->other_end = stream;
|
|
|
2319 set_encoding_stream_coding_system (lstr, codesys);
|
|
|
2320 XSETLSTREAM (obj, lstr);
|
|
|
2321 return obj;
|
|
|
2322 }
|
|
|
2323
|
|
|
2324 Lisp_Object
|
|
|
2325 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2326 {
|
|
|
2327 return make_encoding_stream_1 (stream, codesys, "r");
|
|
|
2328 }
|
|
|
2329
|
|
|
2330 Lisp_Object
|
|
|
2331 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2332 {
|
|
|
2333 return make_encoding_stream_1 (stream, codesys, "w");
|
|
|
2334 }
|
|
|
2335
|
|
|
2336 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
|
2337 external format, according to the encoding stream ENCODING.
|
|
|
2338 Store the encoded data into DST. */
|
|
|
2339
|
|
|
2340 static void
|
|
|
2341 mule_encode (Lstream *encoding, CONST unsigned char *src,
|
|
|
2342 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2343 {
|
|
|
2344 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2345
|
|
|
2346 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2347 {
|
|
|
2348 #ifdef DEBUG_XEMACS
|
|
|
2349 case CODESYS_INTERNAL:
|
|
|
2350 Dynarr_add_many (dst, src, n);
|
|
|
2351 break;
|
|
|
2352 #endif
|
|
|
2353 case CODESYS_AUTODETECT:
|
|
|
2354 /* If we got this far and still haven't decided on the coding
|
|
|
2355 system, then do no conversion. */
|
|
|
2356 case CODESYS_NO_CONVERSION:
|
|
|
2357 encode_coding_no_conversion (encoding, src, dst, n);
|
|
|
2358 break;
|
|
|
2359 case CODESYS_SHIFT_JIS:
|
|
74
|
2360 encode_coding_sjis (encoding, src, dst, n);
|
|
70
|
2361 break;
|
|
|
2362 case CODESYS_BIG5:
|
|
|
2363 encode_coding_big5 (encoding, src, dst, n);
|
|
|
2364 break;
|
|
|
2365 case CODESYS_CCL:
|
|
|
2366 ccl_driver (&str->ccl, src, dst, n, (str->flags) & CODING_STATE_END);
|
|
|
2367 break;
|
|
|
2368 case CODESYS_ISO2022:
|
|
|
2369 encode_coding_iso2022 (encoding, src, dst, n);
|
|
|
2370 break;
|
|
|
2371 default:
|
|
|
2372 abort ();
|
|
|
2373 }
|
|
|
2374 }
|
|
|
2375
|
|
|
2376 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2377 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2378 This will, for example, convert Japanese characters into stuff such as
|
|
|
2379 \"^[$B!<!+^[(B\" if you use the JIS encoding. Return length of encoded
|
|
|
2380 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2381 */
|
|
|
2382 (start, end, coding_system, buffer))
|
|
|
2383 {
|
|
|
2384 Bufpos b, e;
|
|
|
2385 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2386 Lisp_Object instream, outstream;
|
|
|
2387 char tempbuf[1024]; /* some random amount */
|
|
|
2388 int speccount = specpdl_depth ();
|
|
|
2389 struct gcpro gcpro1, gcpro2;
|
|
|
2390
|
|
|
2391 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
96
|
2392
|
|
|
2393 barf_if_buffer_read_only (buf, b, e);
|
|
|
2394
|
|
70
|
2395 coding_system = Fget_coding_system (coding_system);
|
|
74
|
2396 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
70
|
2397 outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2398 outstream = make_decoding_output_stream (XLSTREAM (outstream),
|
|
|
2399 Fget_coding_system (Qbinary));
|
|
|
2400 outstream = make_encoding_output_stream (XLSTREAM (outstream),
|
|
|
2401 coding_system);
|
|
|
2402 GCPRO2 (instream, outstream);
|
|
|
2403 record_unwind_protect (close_both_streams, Fcons (instream, outstream));
|
|
|
2404 /* The chain of streams looks like this:
|
|
|
2405
|
|
|
2406 [BUFFER] <----- send through
|
|
|
2407 ------> [ENCODE AS SPECIFIED]
|
|
|
2408 ------> [DECODE AS BINARY]
|
|
|
2409 ------> [BUFFER]
|
|
|
2410 */
|
|
|
2411 while (1)
|
|
|
2412 {
|
|
|
2413 int size_in_bytes;
|
|
|
2414 Bufpos oldpos, newpos, even_newer_pos;
|
|
|
2415
|
|
|
2416 oldpos = lisp_buffer_stream_startpos (XLSTREAM (instream));
|
|
|
2417 size_in_bytes = Lstream_read (XLSTREAM (instream), tempbuf,
|
|
|
2418 sizeof (tempbuf));
|
|
|
2419 if (!size_in_bytes)
|
|
|
2420 break;
|
|
|
2421 newpos = lisp_buffer_stream_startpos (XLSTREAM (instream));
|
|
|
2422 Lstream_write (XLSTREAM (outstream), tempbuf, size_in_bytes);
|
|
|
2423 even_newer_pos = lisp_buffer_stream_startpos (XLSTREAM (instream));
|
|
|
2424 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2425 even_newer_pos, 0);
|
|
|
2426 }
|
|
|
2427
|
|
|
2428 {
|
|
|
2429 Charcount retlen =
|
|
|
2430 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2431 unbind_to (speccount, Qnil);
|
|
|
2432 UNGCPRO;
|
|
|
2433 return make_int (retlen);
|
|
|
2434 }
|
|
|
2435 }
|
|
|
2436
|
|
|
2437
|
|
|
2438 /************************************************************************/
|
|
|
2439 /* Shift-JIS methods */
|
|
|
2440 /************************************************************************/
|
|
|
2441
|
|
|
2442 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
|
2443 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
|
|
2444 as is. A character of JISX0201-Kana (TYPE94 character set) is
|
|
|
2445 encoded by "position-code + 0x80". A character of JISX0208
|
|
|
2446 (TYPE94x94 character set) is encoded in 2-byte but two
|
|
|
2447 position-codes are divided and shifted so that it fit in the range
|
|
|
2448 below.
|
|
|
2449
|
|
|
2450 --- CODE RANGE of Shift-JIS ---
|
|
|
2451 (character set) (range)
|
|
|
2452 ASCII 0x00 .. 0x7F
|
|
|
2453 JISX0201-Kana 0xA0 .. 0xDF
|
|
|
2454 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
|
2455 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
|
2456 -------------------------------
|
|
|
2457
|
|
|
2458 */
|
|
|
2459
|
|
|
2460 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
|
2461
|
|
74
|
2462 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
|
|
70
|
2463 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
|
2464
|
|
|
2465 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2466
|
|
74
|
2467 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
|
|
70
|
2468 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
|
2469
|
|
74
|
2470 #define BYTE_SJIS_KATAKANA_P(c) \
|
|
70
|
2471 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
|
2472
|
|
|
2473 /* Code conversion macros. These are macros because they are used in
|
|
|
2474 inner loops during code conversion.
|
|
|
2475
|
|
|
2476 Note that temporary variables in macros introduce the classic
|
|
|
2477 dynamic-scoping problems with variable names. We use capital-
|
|
|
2478 lettered variables in the assumption that XEmacs does not use
|
|
|
2479 capital letters in variables except in a very formalized way
|
|
|
2480 (e.g. Qstring). */
|
|
|
2481
|
|
|
2482 /* Convert shift-JIS code (sj1, sj2) into internal string
|
|
|
2483 representation (c1, c2). (The leading byte is assumed.) */
|
|
|
2484
|
|
74
|
2485 #define DECODE_SJIS(sj1, sj2, c1, c2) \
|
|
|
2486 do { \
|
|
|
2487 int I1 = sj1, I2 = sj2; \
|
|
|
2488 if (I2 >= 0x9f) \
|
|
|
2489 c1 = (I1 << 1) - ((I1 >= 0xe0) ? 0xe0 : 0x60), \
|
|
|
2490 c2 = I2 + 2; \
|
|
|
2491 else \
|
|
|
2492 c1 = (I1 << 1) - ((I1 >= 0xe0) ? 0xe1 : 0x61), \
|
|
|
2493 c2 = I2 + ((I2 >= 0x7f) ? 0x60 : 0x61); \
|
|
70
|
2494 } while (0)
|
|
|
2495
|
|
|
2496 /* Convert the internal string representation of a Shift-JIS character
|
|
|
2497 (c1, c2) into Shift-JIS code (sj1, sj2). The leading byte is
|
|
|
2498 assumed. */
|
|
|
2499
|
|
74
|
2500 #define ENCODE_SJIS(c1, c2, sj1, sj2) \
|
|
|
2501 do { \
|
|
96
|
2502 int I1 = c1, I2 = c2; \
|
|
74
|
2503 if (I1 & 1) \
|
|
|
2504 sj1 = (I1 >> 1) + ((I1 < 0xdf) ? 0x31 : 0x71), \
|
|
|
2505 sj2 = I2 - ((I2 >= 0xe0) ? 0x60 : 0x61); \
|
|
|
2506 else \
|
|
|
2507 sj1 = (I1 >> 1) + ((I1 < 0xdf) ? 0x30 : 0x70), \
|
|
|
2508 sj2 = I2 - 2; \
|
|
70
|
2509 } while (0)
|
|
|
2510
|
|
|
2511 static int
|
|
74
|
2512 detect_coding_sjis (struct detection_state *st, CONST unsigned char *src,
|
|
|
2513 unsigned int n)
|
|
70
|
2514 {
|
|
|
2515 int c;
|
|
|
2516
|
|
|
2517 while (n--)
|
|
|
2518 {
|
|
|
2519 c = *src++;
|
|
|
2520 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
2521 return 0;
|
|
|
2522 if (st->shift_jis.in_second_byte)
|
|
|
2523 {
|
|
|
2524 st->shift_jis.in_second_byte = 0;
|
|
|
2525 if (c < 0x40)
|
|
|
2526 return 0;
|
|
|
2527 }
|
|
|
2528 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
|
2529 st->shift_jis.in_second_byte = 1;
|
|
|
2530 }
|
|
|
2531 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
|
2532 }
|
|
|
2533
|
|
|
2534 /* Convert Shift-JIS data to internal format. */
|
|
|
2535
|
|
|
2536 static void
|
|
74
|
2537 decode_coding_sjis (Lstream *decoding, CONST unsigned char *src,
|
|
|
2538 unsigned_char_dynarr *dst, unsigned int n)
|
|
70
|
2539 {
|
|
|
2540 unsigned char c;
|
|
|
2541 unsigned int flags, ch;
|
|
181
|
2542 enum eol_type eol_type;
|
|
70
|
2543 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2544
|
|
|
2545 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2546 eol_type = str->eol_type;
|
|
70
|
2547
|
|
|
2548 while (n--)
|
|
|
2549 {
|
|
|
2550 c = *src++;
|
|
183
|
2551
|
|
70
|
2552 if (ch)
|
|
|
2553 {
|
|
|
2554 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
74
|
2555 if (BYTE_SJIS_TWO_BYTE_2_P (c))
|
|
70
|
2556 {
|
|
|
2557 unsigned char e1, e2;
|
|
|
2558
|
|
|
2559 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
74
|
2560 DECODE_SJIS (ch, c, e1, e2);
|
|
70
|
2561 Dynarr_add (dst, e1);
|
|
|
2562 Dynarr_add (dst, e2);
|
|
|
2563 }
|
|
|
2564 else
|
|
|
2565 {
|
|
|
2566 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2567 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2568 }
|
|
|
2569 ch = 0;
|
|
|
2570 }
|
|
|
2571 else
|
|
|
2572 {
|
|
181
|
2573 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
74
|
2574 if (BYTE_SJIS_TWO_BYTE_1_P (c))
|
|
70
|
2575 ch = c;
|
|
74
|
2576 else if (BYTE_SJIS_KATAKANA_P (c))
|
|
70
|
2577 {
|
|
74
|
2578 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
|
|
70
|
2579 Dynarr_add (dst, c);
|
|
|
2580 }
|
|
|
2581 else
|
|
|
2582 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2583 }
|
|
|
2584 label_continue_loop:;
|
|
|
2585 }
|
|
|
2586
|
|
|
2587 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2588
|
|
|
2589 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2590 }
|
|
|
2591
|
|
|
2592 /* Convert internally-formatted data to Shift-JIS. */
|
|
|
2593
|
|
|
2594 static void
|
|
74
|
2595 encode_coding_sjis (Lstream *encoding, CONST unsigned char *src,
|
|
|
2596 unsigned_char_dynarr *dst, unsigned int n)
|
|
70
|
2597 {
|
|
|
2598 unsigned char c;
|
|
|
2599 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2600 unsigned int flags, ch;
|
|
181
|
2601 enum eol_type eol_type;
|
|
70
|
2602
|
|
|
2603 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2604 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
2605
|
|
|
2606 while (n--)
|
|
|
2607 {
|
|
|
2608 c = *src++;
|
|
|
2609 if (c == '\n')
|
|
|
2610 {
|
|
181
|
2611 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
2612 Dynarr_add (dst, '\r');
|
|
181
|
2613 if (eol_type != EOL_CR)
|
|
70
|
2614 Dynarr_add (dst, '\n');
|
|
|
2615 ch = 0;
|
|
|
2616 }
|
|
|
2617 else if (BYTE_ASCII_P (c))
|
|
|
2618 {
|
|
|
2619 Dynarr_add (dst, c);
|
|
|
2620 ch = 0;
|
|
|
2621 }
|
|
|
2622 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
74
|
2623 ch = (c == LEADING_BYTE_KATAKANA_JISX0201 ||
|
|
70
|
2624 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2625 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
|
2626 else if (ch)
|
|
|
2627 {
|
|
74
|
2628 if (ch == LEADING_BYTE_KATAKANA_JISX0201)
|
|
70
|
2629 {
|
|
|
2630 Dynarr_add (dst, c);
|
|
|
2631 ch = 0;
|
|
|
2632 }
|
|
|
2633 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2634 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
|
2635 ch = c;
|
|
|
2636 else
|
|
|
2637 {
|
|
|
2638 unsigned char j1, j2;
|
|
74
|
2639 ENCODE_SJIS (ch, c, j1, j2);
|
|
70
|
2640 Dynarr_add (dst, j1);
|
|
|
2641 Dynarr_add (dst, j2);
|
|
|
2642 ch = 0;
|
|
|
2643 }
|
|
|
2644 }
|
|
|
2645 }
|
|
|
2646
|
|
|
2647 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2648 }
|
|
|
2649
|
|
|
2650 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
|
2651 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
|
2652 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
|
2653 Return the corresponding character.
|
|
|
2654 */
|
|
|
2655 (code))
|
|
|
2656 {
|
|
|
2657 unsigned char c1, c2, s1, s2;
|
|
183
|
2658
|
|
70
|
2659 CHECK_CONS (code);
|
|
|
2660 CHECK_INT (XCAR (code));
|
|
|
2661 CHECK_INT (XCDR (code));
|
|
|
2662 s1 = XINT (XCAR (code));
|
|
|
2663 s2 = XINT (XCDR (code));
|
|
74
|
2664 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
|
|
|
2665 BYTE_SJIS_TWO_BYTE_2_P (s2))
|
|
70
|
2666 {
|
|
74
|
2667 DECODE_SJIS (s1, s2, c1, c2);
|
|
70
|
2668 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
|
2669 c1 & 0x7F, c2 & 0x7F));
|
|
|
2670 }
|
|
|
2671 else
|
|
|
2672 return Qnil;
|
|
|
2673 }
|
|
|
2674
|
|
|
2675 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
|
2676 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
|
2677 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
|
2678 */
|
|
|
2679 (ch))
|
|
|
2680 {
|
|
|
2681 Lisp_Object charset;
|
|
|
2682 int c1, c2, s1, s2;
|
|
183
|
2683
|
|
70
|
2684 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2685 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2686 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
|
2687 {
|
|
74
|
2688 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
70
|
2689 return Fcons (make_int (s1), make_int (s2));
|
|
|
2690 }
|
|
|
2691 else
|
|
|
2692 return Qnil;
|
|
|
2693 }
|
|
|
2694
|
|
|
2695
|
|
|
2696 /************************************************************************/
|
|
|
2697 /* Big5 methods */
|
|
|
2698 /************************************************************************/
|
|
|
2699
|
|
|
2700 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
|
2701 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
|
2702 character set and is encoded in two-byte.
|
|
|
2703
|
|
|
2704 --- CODE RANGE of BIG5 ---
|
|
|
2705 (character set) (range)
|
|
|
2706 ASCII 0x00 .. 0x7F
|
|
|
2707 Big5 (1st byte) 0xA1 .. 0xFE
|
|
|
2708 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
|
2709 --------------------------
|
|
|
2710
|
|
|
2711 Since the number of characters in Big5 is larger than maximum
|
|
|
2712 characters in Emacs' charset (96x96), it can't be handled as one
|
|
|
2713 charset. So, in Emacs, Big5 is devided into two: `charset-big5-1'
|
|
|
2714 and `charset-big5-2'. Both <type>s are TYPE94x94. The former
|
|
|
2715 contains frequently used characters and the latter contains less
|
|
|
2716 frequently used characters. */
|
|
|
2717
|
|
|
2718 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
|
2719 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
|
2720
|
|
|
2721 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2722
|
|
|
2723 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
|
2724 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
|
2725
|
|
|
2726 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
|
2727
|
|
|
2728 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
|
2729
|
|
|
2730 /* Code conversion macros. These are macros because they are used in
|
|
|
2731 inner loops during code conversion.
|
|
|
2732
|
|
|
2733 Note that temporary variables in macros introduce the classic
|
|
|
2734 dynamic-scoping problems with variable names. We use capital-
|
|
|
2735 lettered variables in the assumption that XEmacs does not use
|
|
|
2736 capital letters in variables except in a very formalized way
|
|
|
2737 (e.g. Qstring). */
|
|
|
2738
|
|
|
2739 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
|
2740 (lb, c1, c2). */
|
|
|
2741
|
|
|
2742 /* There is a much simpler way to split the Big5 charset into two.
|
|
|
2743 For the moment I'm going to leave the algorithm as-is because it
|
|
|
2744 claims to separate out the most-used characters into a single
|
|
|
2745 charset, which perhaps will lead to optimizations in various
|
|
|
2746 places.
|
|
|
2747
|
|
|
2748 The way the algorithm works is something like this:
|
|
|
2749
|
|
|
2750 Big5 can be viewed as a 94x157 charset, where the row is
|
|
|
2751 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
|
2752 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
|
2753 the split between low and high column numbers is apparently
|
|
|
2754 meaningless; ascending rows produce less and less frequent chars.
|
|
|
2755 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
|
2756 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
|
2757 second. To do the conversion, we convert the character into
|
|
|
2758 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
|
2759 is the second, etc. That way, the characters are ordered by
|
|
|
2760 decreasing frequency. Then we just chop the space in two
|
|
|
2761 and coerce the result into a 94x94 space.
|
|
|
2762 */
|
|
|
2763
|
|
|
2764 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
|
2765 { \
|
|
|
2766 int B1 = b1, B2 = b2; \
|
|
|
2767 unsigned int I \
|
|
|
2768 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
|
2769 \
|
|
|
2770 if (B1 < 0xC9) \
|
|
|
2771 { \
|
|
|
2772 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
|
2773 } \
|
|
|
2774 else \
|
|
|
2775 { \
|
|
|
2776 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
|
2777 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
|
2778 } \
|
|
|
2779 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
|
2780 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
|
2781 } while (0)
|
|
|
2782
|
|
|
2783 /* Convert the internal string representation of a Big5 character
|
|
|
2784 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
|
2785
|
|
|
2786 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
|
2787 { \
|
|
|
2788 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
|
2789 \
|
|
|
2790 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
|
2791 { \
|
|
|
2792 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
|
2793 } \
|
|
|
2794 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
|
2795 b2 = I % BIG5_SAME_ROW; \
|
|
|
2796 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
|
2797 } while (0)
|
|
|
2798
|
|
|
2799 static int
|
|
|
2800 detect_coding_big5 (struct detection_state *st, CONST unsigned char *src,
|
|
|
2801 unsigned int n)
|
|
|
2802 {
|
|
|
2803 int c;
|
|
|
2804
|
|
|
2805 while (n--)
|
|
|
2806 {
|
|
|
2807 c = *src++;
|
|
|
2808 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
|
2809 (c >= 0x80 && c <= 0xA0))
|
|
|
2810 return 0;
|
|
|
2811 if (st->big5.in_second_byte)
|
|
|
2812 {
|
|
|
2813 st->big5.in_second_byte = 0;
|
|
|
2814 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
|
2815 return 0;
|
|
|
2816 }
|
|
|
2817 else if (c >= 0xA1)
|
|
|
2818 st->big5.in_second_byte = 1;
|
|
|
2819 }
|
|
|
2820 return CODING_CATEGORY_BIG5_MASK;
|
|
|
2821 }
|
|
|
2822
|
|
|
2823 /* Convert Big5 data to internal format. */
|
|
|
2824
|
|
|
2825 static void
|
|
|
2826 decode_coding_big5 (Lstream *decoding, CONST unsigned char *src,
|
|
|
2827 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2828 {
|
|
|
2829 unsigned char c;
|
|
181
|
2830 unsigned int flags, ch;
|
|
|
2831 enum eol_type eol_type;
|
|
70
|
2832 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2833
|
|
|
2834 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2835 eol_type = str->eol_type;
|
|
70
|
2836
|
|
|
2837 while (n--)
|
|
|
2838 {
|
|
|
2839 c = *src++;
|
|
|
2840 if (ch)
|
|
|
2841 {
|
|
|
2842 /* Previous character was first byte of Big5 char. */
|
|
|
2843 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
|
2844 {
|
|
|
2845 unsigned char b1, b2, b3;
|
|
|
2846 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
|
2847 Dynarr_add (dst, b1);
|
|
|
2848 Dynarr_add (dst, b2);
|
|
|
2849 Dynarr_add (dst, b3);
|
|
|
2850 }
|
|
|
2851 else
|
|
|
2852 {
|
|
|
2853 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2854 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2855 }
|
|
|
2856 ch = 0;
|
|
|
2857 }
|
|
|
2858 else
|
|
|
2859 {
|
|
181
|
2860 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
2861 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
|
2862 ch = c;
|
|
|
2863 else
|
|
|
2864 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2865 }
|
|
|
2866 label_continue_loop:;
|
|
|
2867 }
|
|
183
|
2868
|
|
70
|
2869 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2870
|
|
|
2871 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2872 }
|
|
|
2873
|
|
|
2874 /* Convert internally-formatted data to Big5. */
|
|
|
2875
|
|
|
2876 static void
|
|
|
2877 encode_coding_big5 (Lstream *encoding, CONST unsigned char *src,
|
|
|
2878 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2879 {
|
|
|
2880 unsigned char c;
|
|
|
2881 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
181
|
2882 unsigned int flags, ch;
|
|
|
2883 enum eol_type eol_type;
|
|
70
|
2884
|
|
|
2885 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
2886 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
2887
|
|
|
2888 while (n--)
|
|
|
2889 {
|
|
|
2890 c = *src++;
|
|
|
2891 if (c == '\n')
|
|
183
|
2892 {
|
|
181
|
2893 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
2894 Dynarr_add (dst, '\r');
|
|
181
|
2895 if (eol_type != EOL_CR)
|
|
70
|
2896 Dynarr_add (dst, '\n');
|
|
|
2897 }
|
|
|
2898 else if (BYTE_ASCII_P (c))
|
|
|
2899 {
|
|
|
2900 /* ASCII. */
|
|
|
2901 Dynarr_add (dst, c);
|
|
|
2902 }
|
|
|
2903 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
2904 {
|
|
|
2905 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
2906 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
2907 {
|
|
|
2908 /* A recognized leading byte. */
|
|
|
2909 ch = c;
|
|
|
2910 continue; /* not done with this character. */
|
|
|
2911 }
|
|
|
2912 /* otherwise just ignore this character. */
|
|
|
2913 }
|
|
|
2914 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
2915 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
2916 {
|
|
|
2917 /* Previous char was a recognized leading byte. */
|
|
|
2918 ch = (ch << 8) | c;
|
|
|
2919 continue; /* not done with this character. */
|
|
|
2920 }
|
|
|
2921 else if (ch)
|
|
|
2922 {
|
|
|
2923 /* Encountering second byte of a Big5 character. */
|
|
|
2924 unsigned char b1, b2;
|
|
|
2925
|
|
|
2926 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
|
2927 Dynarr_add (dst, b1);
|
|
|
2928 Dynarr_add (dst, b2);
|
|
|
2929 }
|
|
|
2930
|
|
|
2931 ch = 0;
|
|
|
2932 }
|
|
|
2933
|
|
|
2934 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
2935 }
|
|
|
2936
|
|
|
2937
|
|
|
2938 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
|
2939 Decode a Big5 character CODE of BIG5 coding-system.
|
|
173
|
2940 CODE is the character code in BIG5, a cons of two integers.
|
|
70
|
2941 Return the corresponding character.
|
|
|
2942 */
|
|
|
2943 (code))
|
|
|
2944 {
|
|
|
2945 unsigned char c1, c2, b1, b2;
|
|
183
|
2946
|
|
70
|
2947 CHECK_CONS (code);
|
|
|
2948 CHECK_INT (XCAR (code));
|
|
|
2949 CHECK_INT (XCDR (code));
|
|
|
2950 b1 = XINT (XCAR (code));
|
|
|
2951 b2 = XINT (XCDR (code));
|
|
|
2952 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
|
2953 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
|
2954 {
|
|
173
|
2955 int leading_byte;
|
|
|
2956 Lisp_Object charset;
|
|
|
2957 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
|
|
|
2958 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
|
|
70
|
2959 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
|
2960 }
|
|
|
2961 else
|
|
|
2962 return Qnil;
|
|
|
2963 }
|
|
|
2964
|
|
|
2965 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
|
2966 Encode the Big5 character CH to BIG5 coding-system.
|
|
|
2967 Return the corresponding character code in Big5.
|
|
|
2968 */
|
|
|
2969 (ch))
|
|
|
2970 {
|
|
|
2971 Lisp_Object charset;
|
|
|
2972 int c1, c2, b1, b2;
|
|
183
|
2973
|
|
70
|
2974 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2975 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2976 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
|
2977 EQ (charset, Vcharset_chinese_big5_2))
|
|
|
2978 {
|
|
|
2979 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
|
2980 b1, b2);
|
|
|
2981 return Fcons (make_int (b1), make_int (b2));
|
|
|
2982 }
|
|
|
2983 else
|
|
|
2984 return Qnil;
|
|
|
2985 }
|
|
|
2986
|
|
|
2987
|
|
|
2988 /************************************************************************/
|
|
|
2989 /* ISO2022 methods */
|
|
|
2990 /************************************************************************/
|
|
|
2991
|
|
|
2992 /* The following note describes the coding system ISO2022 briefly.
|
|
|
2993 Since the intention of this note is to help understanding of the
|
|
|
2994 programs in this file, some parts are NOT ACCURATE or OVERLY
|
|
|
2995 SIMPLIFIED. For thorough understanding, please refer to the
|
|
|
2996 original document of ISO2022.
|
|
|
2997
|
|
|
2998 ISO2022 provides many mechanisms to encode several character sets
|
|
|
2999 in 7-bit and 8-bit environments. If one chooses 7-bit environment,
|
|
|
3000 all text is encoded by codes of less than 128. This may make the
|
|
|
3001 encoded text a little bit longer, but the text get more stability
|
|
|
3002 to pass through several gateways (some of them strip off MSB).
|
|
|
3003
|
|
|
3004 There are two kind of character sets: control character set and
|
|
|
3005 graphic character set. The former contains control characters such
|
|
|
3006 as `newline' and `escape' to provide control functions (control
|
|
|
3007 functions are provided also by escape sequence). The latter
|
|
|
3008 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
|
3009 two control character sets and many graphic character sets.
|
|
|
3010
|
|
|
3011 Graphic character sets are classified into one of four types,
|
|
|
3012 according to the dimension and number of characters in the set:
|
|
|
3013 TYPE94, TYPE96, TYPE94x94, and TYPE96x96. In addition, each
|
|
|
3014 character set is assigned an identification byte, unique for each
|
|
|
3015 type, called "final character" (denoted as <F> hereafter). The <F>
|
|
|
3016 of each character set is decided by ECMA(*) when it is registered
|
|
|
3017 in ISO. Code range of <F> is 0x30..0x7F (0x30..0x3F are for
|
|
|
3018 private use only).
|
|
|
3019
|
|
|
3020 Note (*): ECMA = European Computer Manufacturers Association
|
|
|
3021
|
|
|
3022 Here are examples of graphic character set [NAME(<F>)]:
|
|
|
3023 o TYPE94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
|
3024 o TYPE96 -- right-half-of-ISO8859-1('A'), ...
|
|
|
3025 o TYPE94x94 -- GB2312('A'), JISX0208('B'), ...
|
|
|
3026 o TYPE96x96 -- none for the moment
|
|
|
3027
|
|
|
3028 A code area (1byte=8bits) is divided into 4 areas, C0, GL, C1, and GR.
|
|
|
3029 C0 [0x00..0x1F] -- control character plane 0
|
|
|
3030 GL [0x20..0x7F] -- graphic character plane 0
|
|
|
3031 C1 [0x80..0x9F] -- control character plane 1
|
|
|
3032 GR [0xA0..0xFF] -- graphic character plane 1
|
|
|
3033
|
|
|
3034 A control character set is directly designated and invoked to C0 or
|
|
|
3035 C1 by an escape sequence. The most common case is that:
|
|
|
3036 - ISO646's control character set is designated/invoked to C0, and
|
|
|
3037 - ISO6429's control character set is designated/invoked to C1,
|
|
|
3038 and usually these designations/invocations are omitted in encoded
|
|
|
3039 text. In a 7-bit environment, only C0 can be used, and a control
|
|
|
3040 character for C1 is encoded by an appropriate escape sequence to
|
|
|
3041 fit into the environment. All control characters for C1 are
|
|
|
3042 defined to have corresponding escape sequences.
|
|
|
3043
|
|
|
3044 A graphic character set is at first designated to one of four
|
|
|
3045 graphic registers (G0 through G3), then these graphic registers are
|
|
|
3046 invoked to GL or GR. These designations and invocations can be
|
|
|
3047 done independently. The most common case is that G0 is invoked to
|
|
|
3048 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
|
3049 these invocations and designations are omitted in encoded text.
|
|
|
3050 In a 7-bit environment, only GL can be used.
|
|
|
3051
|
|
|
3052 When a graphic character set of TYPE94 or TYPE94x94 is invoked to
|
|
|
3053 GL, codes 0x20 and 0x7F of the GL area work as control characters
|
|
|
3054 SPACE and DEL respectively, and code 0xA0 and 0xFF of GR area
|
|
|
3055 should not be used.
|
|
|
3056
|
|
|
3057 There are two ways of invocation: locking-shift and single-shift.
|
|
|
3058 With locking-shift, the invocation lasts until the next different
|
|
|
3059 invocation, whereas with single-shift, the invocation works only
|
|
|
3060 for the following character and doesn't affect locking-shift.
|
|
|
3061 Invocations are done by the following control characters or escape
|
|
|
3062 sequences.
|
|
|
3063
|
|
|
3064 ----------------------------------------------------------------------
|
|
|
3065 abbrev function cntrl escape seq description
|
|
|
3066 ----------------------------------------------------------------------
|
|
|
3067 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
|
3068 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
|
3069 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR
|
|
|
3070 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
|
3071 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR
|
|
|
3072 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
|
|
3073 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR
|
|
|
3074 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
|
3075 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
|
3076 ----------------------------------------------------------------------
|
|
|
3077 The first four are for locking-shift. Control characters for these
|
|
|
3078 functions are defined by macros ISO_CODE_XXX in `coding.h'.
|
|
|
3079
|
|
|
3080 Designations are done by the following escape sequences.
|
|
|
3081 ----------------------------------------------------------------------
|
|
|
3082 escape sequence description
|
|
|
3083 ----------------------------------------------------------------------
|
|
|
3084 ESC '(' <F> designate TYPE94<F> to G0
|
|
|
3085 ESC ')' <F> designate TYPE94<F> to G1
|
|
|
3086 ESC '*' <F> designate TYPE94<F> to G2
|
|
|
3087 ESC '+' <F> designate TYPE94<F> to G3
|
|
|
3088 ESC ',' <F> designate TYPE96<F> to G0 (*)
|
|
|
3089 ESC '-' <F> designate TYPE96<F> to G1
|
|
|
3090 ESC '.' <F> designate TYPE96<F> to G2
|
|
|
3091 ESC '/' <F> designate TYPE96<F> to G3
|
|
|
3092 ESC '$' '(' <F> designate TYPE94x94<F> to G0 (**)
|
|
|
3093 ESC '$' ')' <F> designate TYPE94x94<F> to G1
|
|
|
3094 ESC '$' '*' <F> designate TYPE94x94<F> to G2
|
|
|
3095 ESC '$' '+' <F> designate TYPE94x94<F> to G3
|
|
|
3096 ESC '$' ',' <F> designate TYPE96x96<F> to G0 (*)
|
|
|
3097 ESC '$' '-' <F> designate TYPE96x96<F> to G1
|
|
|
3098 ESC '$' '.' <F> designate TYPE96x96<F> to G2
|
|
|
3099 ESC '$' '/' <F> designate TYPE96x96<F> to G3
|
|
|
3100 ----------------------------------------------------------------------
|
|
|
3101 In this list, "TYPE94<F>" means a graphic character set of type TYPE94
|
|
|
3102 and final character <F>, and etc.
|
|
|
3103
|
|
|
3104 Note (*): Although these designations are not allowed in ISO2022,
|
|
|
3105 Emacs accepts them on decoding, and produces them on encoding
|
|
|
3106 TYPE96 or TYPE96x96 character set in a coding system which is
|
|
|
3107 characterized as 7-bit environment, non-locking-shift, and
|
|
|
3108 non-single-shift.
|
|
|
3109
|
|
|
3110 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
|
|
3111 '(' can be omitted. We call this as "short-form" here after.
|
|
|
3112
|
|
|
3113 Now you may notice that there are a lot of ways for encoding the
|
|
|
3114 same multilingual text in ISO2022. Actually, there exist many
|
|
|
3115 coding systems such as Compound Text (used in X's inter client
|
|
|
3116 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
|
3117 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
|
3118 localized platforms), and all of these are variants of ISO2022.
|
|
|
3119
|
|
|
3120 In addition to the above, Emacs handles two more kinds of escape
|
|
|
3121 sequences: ISO6429's direction specification and Emacs' private
|
|
|
3122 sequence for specifying character composition.
|
|
|
3123
|
|
|
3124 ISO6429's direction specification takes the following format:
|
|
|
3125 o CSI ']' -- end of the current direction
|
|
|
3126 o CSI '0' ']' -- end of the current direction
|
|
|
3127 o CSI '1' ']' -- start of left-to-right text
|
|
|
3128 o CSI '2' ']' -- start of right-to-left text
|
|
|
3129 The control character CSI (0x9B: control sequence introducer) is
|
|
|
3130 abbreviated to the escape sequence ESC '[' in 7-bit environment.
|
|
183
|
3131
|
|
70
|
3132 Character composition specification takes the following format:
|
|
|
3133 o ESC '0' -- start character composition
|
|
|
3134 o ESC '1' -- end character composition
|
|
|
3135 Since these are not standard escape sequences of any ISO, the use
|
|
|
3136 of them for these meanings is restricted to Emacs only. */
|
|
|
3137
|
|
|
3138 static void
|
|
|
3139 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
|
3140 {
|
|
|
3141 int i;
|
|
183
|
3142
|
|
70
|
3143 for (i = 0; i < 4; i++)
|
|
|
3144 {
|
|
|
3145 if (!NILP (coding_system))
|
|
|
3146 iso->charset[i] =
|
|
|
3147 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
|
3148 else
|
|
|
3149 iso->charset[i] = Qt;
|
|
|
3150 iso->invalid_designated[i] = 0;
|
|
|
3151 }
|
|
|
3152 iso->esc = ISO_ESC_NOTHING;
|
|
|
3153 iso->esc_bytes_index = 0;
|
|
|
3154 iso->register_left = 0;
|
|
|
3155 iso->register_right = 1;
|
|
|
3156 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3157 iso->invalid_switch_dir = 0;
|
|
|
3158 iso->output_direction_sequence = 0;
|
|
|
3159 iso->output_literally = 0;
|
|
|
3160 if (iso->composite_chars)
|
|
|
3161 Dynarr_reset (iso->composite_chars);
|
|
|
3162 }
|
|
|
3163
|
|
|
3164 static int
|
|
|
3165 fit_to_be_escape_quoted (unsigned char c)
|
|
|
3166 {
|
|
|
3167 switch (c)
|
|
|
3168 {
|
|
|
3169 case ISO_CODE_ESC:
|
|
|
3170 case ISO_CODE_CSI:
|
|
|
3171 case ISO_CODE_SS2:
|
|
|
3172 case ISO_CODE_SS3:
|
|
|
3173 case ISO_CODE_SO:
|
|
|
3174 case ISO_CODE_SI:
|
|
|
3175 return 1;
|
|
|
3176
|
|
|
3177 default:
|
|
|
3178 return 0;
|
|
|
3179 }
|
|
|
3180 }
|
|
|
3181
|
|
|
3182 /* Parse one byte of an ISO2022 escape sequence.
|
|
|
3183 If the result is an invalid escape sequence, return 0 and
|
|
|
3184 do not change anything in STR. Otherwise, if the result is
|
|
|
3185 an incomplete escape sequence, update ISO2022.ESC and
|
|
|
3186 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
|
3187 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
|
3188 return 1.
|
|
|
3189
|
|
|
3190 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
|
3191 or invocation of an invalid character set and treat that as
|
|
|
3192 an unrecognized escape sequence. */
|
|
|
3193
|
|
|
3194 static int
|
|
|
3195 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
|
3196 unsigned char c, unsigned int *flags,
|
|
|
3197 int check_invalid_charsets)
|
|
|
3198 {
|
|
|
3199 /* (1) If we're at the end of a designation sequence, CS is the
|
|
|
3200 charset being designated and REG is the register to designate
|
|
|
3201 it to.
|
|
|
3202
|
|
|
3203 (2) If we're at the end of a locking-shift sequence, REG is
|
|
|
3204 the register to invoke and HALF (0 == left, 1 == right) is
|
|
|
3205 the half to invoke it into.
|
|
|
3206
|
|
|
3207 (3) If we're at the end of a single-shift sequence, REG is
|
|
|
3208 the register to invoke. */
|
|
|
3209 Lisp_Object cs = Qnil;
|
|
|
3210 int reg, half;
|
|
|
3211
|
|
|
3212 /* NOTE: This code does goto's all over the fucking place.
|
|
|
3213 The reason for this is that we're basically implementing
|
|
|
3214 a state machine here, and hierarchical languages like C
|
|
|
3215 don't really provide a clean way of doing this. */
|
|
|
3216
|
|
|
3217 if (! (*flags & CODING_STATE_ESCAPE))
|
|
|
3218 /* At beginning of escape sequence; we need to reset our
|
|
|
3219 escape-state variables. */
|
|
|
3220 iso->esc = ISO_ESC_NOTHING;
|
|
|
3221
|
|
|
3222 iso->output_literally = 0;
|
|
|
3223 iso->output_direction_sequence = 0;
|
|
|
3224
|
|
|
3225 switch (iso->esc)
|
|
|
3226 {
|
|
|
3227 case ISO_ESC_NOTHING:
|
|
|
3228 iso->esc_bytes_index = 0;
|
|
|
3229 switch (c)
|
|
|
3230 {
|
|
|
3231 case ISO_CODE_ESC: /* Start escape sequence */
|
|
|
3232 *flags |= CODING_STATE_ESCAPE;
|
|
|
3233 iso->esc = ISO_ESC;
|
|
|
3234 goto not_done;
|
|
183
|
3235
|
|
70
|
3236 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
|
3237 *flags |= CODING_STATE_ESCAPE;
|
|
|
3238 iso->esc = ISO_ESC_5_11;
|
|
|
3239 goto not_done;
|
|
|
3240
|
|
|
3241 case ISO_CODE_SO: /* locking shift 1 */
|
|
|
3242 reg = 1; half = 0;
|
|
|
3243 goto locking_shift;
|
|
|
3244 case ISO_CODE_SI: /* locking shift 0 */
|
|
|
3245 reg = 0; half = 0;
|
|
|
3246 goto locking_shift;
|
|
|
3247
|
|
|
3248 case ISO_CODE_SS2: /* single shift */
|
|
|
3249 reg = 2;
|
|
|
3250 goto single_shift;
|
|
|
3251 case ISO_CODE_SS3: /* single shift */
|
|
|
3252 reg = 3;
|
|
|
3253 goto single_shift;
|
|
|
3254
|
|
|
3255 default: /* Other control characters */
|
|
|
3256 return 0;
|
|
|
3257 }
|
|
|
3258
|
|
|
3259 case ISO_ESC:
|
|
|
3260 switch (c)
|
|
|
3261 {
|
|
|
3262 /**** single shift ****/
|
|
|
3263
|
|
|
3264 case 'N': /* single shift 2 */
|
|
|
3265 reg = 2;
|
|
|
3266 goto single_shift;
|
|
|
3267 case 'O': /* single shift 3 */
|
|
|
3268 reg = 3;
|
|
|
3269 goto single_shift;
|
|
|
3270
|
|
|
3271 /**** locking shift ****/
|
|
|
3272
|
|
|
3273 case '~': /* locking shift 1 right */
|
|
|
3274 reg = 1; half = 1;
|
|
|
3275 goto locking_shift;
|
|
|
3276 case 'n': /* locking shift 2 */
|
|
|
3277 reg = 2; half = 0;
|
|
|
3278 goto locking_shift;
|
|
|
3279 case '}': /* locking shift 2 right */
|
|
|
3280 reg = 2; half = 1;
|
|
|
3281 goto locking_shift;
|
|
|
3282 case 'o': /* locking shift 3 */
|
|
|
3283 reg = 3; half = 0;
|
|
|
3284 goto locking_shift;
|
|
|
3285 case '|': /* locking shift 3 right */
|
|
|
3286 reg = 3; half = 1;
|
|
|
3287 goto locking_shift;
|
|
|
3288
|
|
|
3289 /**** composite ****/
|
|
|
3290
|
|
|
3291 case '0':
|
|
|
3292 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
|
3293 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
|
3294 CODING_STATE_COMPOSITE;
|
|
|
3295 return 1;
|
|
183
|
3296
|
|
70
|
3297 case '1':
|
|
|
3298 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
|
3299 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
|
3300 ~CODING_STATE_COMPOSITE;
|
|
|
3301 return 1;
|
|
|
3302
|
|
|
3303 /**** directionality ****/
|
|
|
3304
|
|
|
3305 case '[':
|
|
|
3306 iso->esc = ISO_ESC_5_11;
|
|
|
3307 goto not_done;
|
|
|
3308
|
|
|
3309 /**** designation ****/
|
|
|
3310
|
|
|
3311 case '$': /* multibyte charset prefix */
|
|
|
3312 iso->esc = ISO_ESC_2_4;
|
|
|
3313 goto not_done;
|
|
|
3314
|
|
|
3315 default:
|
|
|
3316 if (0x28 <= c && c <= 0x2F)
|
|
|
3317 {
|
|
179
|
3318 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
|
|
70
|
3319 goto not_done;
|
|
|
3320 }
|
|
|
3321
|
|
|
3322 /* This function is called with CODESYS equal to nil when
|
|
|
3323 doing coding-system detection. */
|
|
|
3324 if (!NILP (codesys)
|
|
|
3325 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
3326 && fit_to_be_escape_quoted (c))
|
|
|
3327 {
|
|
|
3328 iso->esc = ISO_ESC_LITERAL;
|
|
|
3329 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3330 return 1;
|
|
|
3331 }
|
|
|
3332
|
|
|
3333 /* bzzzt! */
|
|
|
3334 return 0;
|
|
|
3335 }
|
|
|
3336
|
|
|
3337
|
|
|
3338
|
|
|
3339 /**** directionality ****/
|
|
|
3340
|
|
|
3341 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
|
3342 if (c == ']')
|
|
|
3343 {
|
|
|
3344 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3345 goto directionality;
|
|
|
3346 }
|
|
|
3347 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
|
3348 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
|
3349 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
|
3350 else return 0;
|
|
|
3351 goto not_done;
|
|
|
3352
|
|
|
3353 case ISO_ESC_5_11_0:
|
|
|
3354 if (c == ']')
|
|
|
3355 {
|
|
|
3356 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3357 goto directionality;
|
|
|
3358 }
|
|
|
3359 return 0;
|
|
|
3360
|
|
|
3361 case ISO_ESC_5_11_1:
|
|
|
3362 if (c == ']')
|
|
|
3363 {
|
|
|
3364 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
3365 goto directionality;
|
|
|
3366 }
|
|
|
3367 return 0;
|
|
|
3368
|
|
|
3369 case ISO_ESC_5_11_2:
|
|
|
3370 if (c == ']')
|
|
|
3371 {
|
|
|
3372 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
|
3373 goto directionality;
|
|
|
3374 }
|
|
|
3375 return 0;
|
|
|
3376
|
|
|
3377 directionality:
|
|
|
3378 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
|
3379 /* Various junk here to attempt to preserve the direction sequences
|
|
|
3380 literally in the text if they would otherwise be swallowed due
|
|
|
3381 to invalid designations that don't show up as actual charset
|
|
|
3382 changes in the text. */
|
|
|
3383 if (iso->invalid_switch_dir)
|
|
|
3384 {
|
|
|
3385 /* We already inserted a direction switch literally into the
|
|
|
3386 text. We assume (#### this may not be right) that the
|
|
|
3387 next direction switch is the one going the other way,
|
|
|
3388 and we need to output that literally as well. */
|
|
|
3389 iso->output_literally = 1;
|
|
|
3390 iso->invalid_switch_dir = 0;
|
|
|
3391 }
|
|
|
3392 else
|
|
|
3393 {
|
|
|
3394 int jj;
|
|
|
3395
|
|
74
|
3396 /* If we are in the thrall of an invalid designation,
|
|
70
|
3397 then stick the directionality sequence literally into the
|
|
|
3398 output stream so it ends up in the original text again. */
|
|
|
3399 for (jj = 0; jj < 4; jj++)
|
|
|
3400 if (iso->invalid_designated[jj])
|
|
|
3401 break;
|
|
|
3402 if (jj < 4)
|
|
|
3403 {
|
|
|
3404 iso->output_literally = 1;
|
|
|
3405 iso->invalid_switch_dir = 1;
|
|
|
3406 }
|
|
|
3407 else
|
|
|
3408 /* Indicate that we haven't yet seen a valid designation,
|
|
|
3409 so that if a switch-dir is directly followed by an
|
|
|
3410 invalid designation, both get inserted literally. */
|
|
|
3411 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
|
3412 }
|
|
|
3413 return 1;
|
|
|
3414
|
|
|
3415
|
|
|
3416 /**** designation ****/
|
|
|
3417
|
|
|
3418 case ISO_ESC_2_4:
|
|
|
3419 if (0x28 <= c && c <= 0x2F)
|
|
|
3420 {
|
|
179
|
3421 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
|
|
70
|
3422 goto not_done;
|
|
|
3423 }
|
|
|
3424 if (0x40 <= c && c <= 0x42)
|
|
|
3425 {
|
|
|
3426 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
|
3427 *flags & CODING_STATE_R2L ?
|
|
|
3428 CHARSET_RIGHT_TO_LEFT :
|
|
|
3429 CHARSET_LEFT_TO_RIGHT);
|
|
|
3430 reg = 0;
|
|
|
3431 goto designated;
|
|
|
3432 }
|
|
|
3433 return 0;
|
|
|
3434
|
|
|
3435 default:
|
|
|
3436 {
|
|
179
|
3437 int type =-1;
|
|
70
|
3438
|
|
|
3439 if (c < '0' || c > '~')
|
|
|
3440 return 0; /* bad final byte */
|
|
|
3441
|
|
|
3442 if (iso->esc >= ISO_ESC_2_8 &&
|
|
|
3443 iso->esc <= ISO_ESC_2_15)
|
|
|
3444 {
|
|
173
|
3445 type = ((iso->esc >= ISO_ESC_2_12) ?
|
|
|
3446 CHARSET_TYPE_96 : CHARSET_TYPE_94);
|
|
70
|
3447 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
|
3448 }
|
|
|
3449 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
|
3450 iso->esc <= ISO_ESC_2_4_15)
|
|
|
3451 {
|
|
173
|
3452 type = ((iso->esc >= ISO_ESC_2_4_12) ?
|
|
|
3453 CHARSET_TYPE_96X96 : CHARSET_TYPE_94X94);
|
|
70
|
3454 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
|
3455 }
|
|
179
|
3456 else
|
|
|
3457 {
|
|
|
3458 /* Can this ever be reached? -slb */
|
|
|
3459 abort();
|
|
|
3460 }
|
|
183
|
3461
|
|
70
|
3462 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
|
3463 *flags & CODING_STATE_R2L ?
|
|
|
3464 CHARSET_RIGHT_TO_LEFT :
|
|
|
3465 CHARSET_LEFT_TO_RIGHT);
|
|
|
3466 goto designated;
|
|
|
3467 }
|
|
|
3468 }
|
|
|
3469
|
|
|
3470 not_done:
|
|
|
3471 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
|
3472 return -1;
|
|
|
3473
|
|
|
3474 single_shift:
|
|
|
3475 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
|
3476 /* can't invoke something that ain't there. */
|
|
|
3477 return 0;
|
|
|
3478 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
|
3479 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3480 if (reg == 2)
|
|
|
3481 *flags |= CODING_STATE_SS2;
|
|
|
3482 else
|
|
|
3483 *flags |= CODING_STATE_SS3;
|
|
|
3484 return 1;
|
|
|
3485
|
|
|
3486 locking_shift:
|
|
|
3487 if (check_invalid_charsets &&
|
|
|
3488 !CHARSETP (iso->charset[reg]))
|
|
|
3489 /* can't invoke something that ain't there. */
|
|
|
3490 return 0;
|
|
|
3491 if (half)
|
|
|
3492 iso->register_right = reg;
|
|
|
3493 else
|
|
|
3494 iso->register_left = reg;
|
|
|
3495 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3496 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
|
3497 return 1;
|
|
|
3498
|
|
|
3499 designated:
|
|
|
3500 if (NILP (cs) && check_invalid_charsets)
|
|
|
3501 {
|
|
|
3502 iso->invalid_designated[reg] = 1;
|
|
|
3503 iso->charset[reg] = Vcharset_ascii;
|
|
|
3504 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
3505 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3506 iso->output_literally = 1;
|
|
|
3507 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
3508 {
|
|
|
3509 /* We encountered a switch-direction followed by an
|
|
|
3510 invalid designation. Ensure that the switch-direction
|
|
|
3511 gets outputted; otherwise it will probably get eaten
|
|
|
3512 when the text is written out again. */
|
|
|
3513 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3514 iso->output_direction_sequence = 1;
|
|
|
3515 /* And make sure that the switch-dir going the other
|
|
|
3516 way gets outputted, as well. */
|
|
|
3517 iso->invalid_switch_dir = 1;
|
|
|
3518 }
|
|
|
3519 return 1;
|
|
|
3520 }
|
|
|
3521 /* This function is called with CODESYS equal to nil when
|
|
|
3522 doing coding-system detection. */
|
|
|
3523 if (!NILP (codesys))
|
|
|
3524 {
|
|
|
3525 charset_conversion_spec_dynarr *dyn =
|
|
|
3526 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
|
3527
|
|
|
3528 if (dyn)
|
|
|
3529 {
|
|
|
3530 int i;
|
|
|
3531
|
|
|
3532 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
3533 {
|
|
|
3534 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
3535 if (EQ (cs, spec->from_charset))
|
|
|
3536 cs = spec->to_charset;
|
|
|
3537 }
|
|
|
3538 }
|
|
|
3539 }
|
|
|
3540
|
|
|
3541 iso->charset[reg] = cs;
|
|
|
3542 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
3543 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3544 if (iso->invalid_designated[reg])
|
|
|
3545 {
|
|
|
3546 iso->invalid_designated[reg] = 0;
|
|
|
3547 iso->output_literally = 1;
|
|
|
3548 }
|
|
|
3549 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
3550 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
3551 return 1;
|
|
|
3552 }
|
|
|
3553
|
|
|
3554 static int
|
|
74
|
3555 detect_coding_iso2022 (struct detection_state *st, CONST unsigned char *src,
|
|
70
|
3556 unsigned int n)
|
|
|
3557 {
|
|
|
3558 int c;
|
|
|
3559 int mask;
|
|
|
3560
|
|
|
3561 /* #### There are serious deficiencies in the recognition mechanism
|
|
|
3562 here. This needs to be much smarter if it's going to cut it. */
|
|
|
3563
|
|
|
3564 if (!st->iso2022.initted)
|
|
|
3565 {
|
|
|
3566 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
|
3567 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
|
3568 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
3569 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
3570 CODING_CATEGORY_ISO_8_2_MASK |
|
|
|
3571 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
|
3572 st->iso2022.flags = 0;
|
|
|
3573 st->iso2022.high_byte_count = 0;
|
|
|
3574 st->iso2022.saw_single_shift = 0;
|
|
|
3575 st->iso2022.initted = 1;
|
|
|
3576 }
|
|
|
3577
|
|
|
3578 mask = st->iso2022.mask;
|
|
|
3579
|
|
|
3580 while (n--)
|
|
|
3581 {
|
|
|
3582 c = *src++;
|
|
|
3583 if (c >= 0xA0)
|
|
|
3584 {
|
|
|
3585 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
3586 st->iso2022.high_byte_count++;
|
|
|
3587 }
|
|
|
3588 else
|
|
|
3589 {
|
|
|
3590 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
|
3591 {
|
|
|
3592 if (st->iso2022.high_byte_count & 1)
|
|
|
3593 /* odd number of high bytes; assume not iso-8-2 */
|
|
|
3594 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
3595 }
|
|
|
3596 st->iso2022.high_byte_count = 0;
|
|
|
3597 st->iso2022.saw_single_shift = 0;
|
|
|
3598 if (c > 0x80)
|
|
|
3599 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
3600 }
|
|
|
3601 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
|
3602 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
|
3603 { /* control chars */
|
|
|
3604 switch (c)
|
|
|
3605 {
|
|
|
3606 /* Allow and ignore control characters that you might
|
|
|
3607 reasonably see in a text file */
|
|
|
3608 case '\r':
|
|
|
3609 case '\n':
|
|
|
3610 case '\t':
|
|
|
3611 case 7: /* bell */
|
|
|
3612 case 8: /* backspace */
|
|
|
3613 case 11: /* vertical tab */
|
|
|
3614 case 12: /* form feed */
|
|
|
3615 case 26: /* MS-DOS C-z junk */
|
|
|
3616 goto label_continue_loop;
|
|
|
3617
|
|
|
3618 default:
|
|
|
3619 break;
|
|
|
3620 }
|
|
|
3621 }
|
|
|
3622
|
|
|
3623 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
|
3624 || BYTE_C1_P (c))
|
|
|
3625 {
|
|
|
3626 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
|
3627 &st->iso2022.flags, 0))
|
|
|
3628 {
|
|
|
3629 switch (st->iso2022.iso.esc)
|
|
|
3630 {
|
|
|
3631 case ISO_ESC_DESIGNATE:
|
|
|
3632 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
|
3633 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
3634 break;
|
|
|
3635 case ISO_ESC_LOCKING_SHIFT:
|
|
|
3636 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
|
3637 goto ran_out_of_chars;
|
|
|
3638 case ISO_ESC_SINGLE_SHIFT:
|
|
|
3639 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
|
3640 st->iso2022.saw_single_shift = 1;
|
|
|
3641 break;
|
|
|
3642 default:
|
|
|
3643 break;
|
|
|
3644 }
|
|
|
3645 }
|
|
|
3646 else
|
|
|
3647 {
|
|
|
3648 mask = 0;
|
|
|
3649 goto ran_out_of_chars;
|
|
|
3650 }
|
|
|
3651 }
|
|
|
3652 label_continue_loop:;
|
|
|
3653 }
|
|
|
3654
|
|
|
3655 ran_out_of_chars:
|
|
|
3656
|
|
|
3657 return mask;
|
|
|
3658 }
|
|
|
3659
|
|
|
3660 static int
|
|
|
3661 postprocess_iso2022_mask (int mask)
|
|
|
3662 {
|
|
|
3663 /* #### kind of cheesy */
|
|
|
3664 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
|
3665 entirely seven-bit and turn off the eight-bit ones. */
|
|
|
3666 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
|
3667 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
3668 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
3669 CODING_CATEGORY_ISO_8_2_MASK);
|
|
|
3670 return mask;
|
|
|
3671 }
|
|
|
3672
|
|
|
3673 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
|
3674 output a switch-dir-to-left-to-right sequence to DST.
|
|
|
3675 Also update FLAGS if it is not a null pointer.
|
|
|
3676 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
3677 need to handle the CSI differently. */
|
|
|
3678
|
|
|
3679 static void
|
|
|
3680 restore_left_to_right_direction (struct Lisp_Coding_System *codesys,
|
|
|
3681 unsigned_char_dynarr *dst,
|
|
|
3682 unsigned int *flags,
|
|
|
3683 int internal_p)
|
|
|
3684 {
|
|
|
3685 if (!flags || (*flags & CODING_STATE_R2L))
|
|
|
3686 {
|
|
|
3687 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
3688 {
|
|
|
3689 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
3690 Dynarr_add (dst, '[');
|
|
|
3691 }
|
|
|
3692 else if (internal_p)
|
|
|
3693 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
3694 else
|
|
|
3695 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
3696 Dynarr_add (dst, '0');
|
|
|
3697 Dynarr_add (dst, ']');
|
|
|
3698 if (flags)
|
|
|
3699 *flags &= ~CODING_STATE_R2L;
|
|
|
3700 }
|
|
|
3701 }
|
|
|
3702
|
|
|
3703 /* If FLAGS is a null pointer or specifies a direction different from
|
|
|
3704 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
|
3705 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
|
3706 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
|
3707 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
3708 need to handle the CSI differently. */
|
|
|
3709
|
|
|
3710 static void
|
|
|
3711 ensure_correct_direction (int direction, struct Lisp_Coding_System *codesys,
|
|
|
3712 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
|
3713 int internal_p)
|
|
|
3714 {
|
|
|
3715 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
|
3716 direction == CHARSET_LEFT_TO_RIGHT)
|
|
|
3717 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
|
3718 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
|
3719 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
|
3720 direction == CHARSET_RIGHT_TO_LEFT)
|
|
|
3721 {
|
|
|
3722 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
3723 {
|
|
|
3724 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
3725 Dynarr_add (dst, '[');
|
|
|
3726 }
|
|
|
3727 else if (internal_p)
|
|
|
3728 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
3729 else
|
|
|
3730 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
3731 Dynarr_add (dst, '2');
|
|
|
3732 Dynarr_add (dst, ']');
|
|
|
3733 if (flags)
|
|
|
3734 *flags |= CODING_STATE_R2L;
|
|
|
3735 }
|
|
|
3736 }
|
|
|
3737
|
|
|
3738 /* Convert ISO2022-format data to internal format. */
|
|
|
3739
|
|
|
3740 static void
|
|
|
3741 decode_coding_iso2022 (Lstream *decoding, CONST unsigned char *src,
|
|
|
3742 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3743 {
|
|
|
3744 unsigned char c;
|
|
|
3745 unsigned int flags, ch;
|
|
181
|
3746 enum eol_type eol_type;
|
|
70
|
3747 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3748 Lisp_Object coding_system = Qnil;
|
|
|
3749 unsigned_char_dynarr *real_dst = dst;
|
|
|
3750
|
|
|
3751 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
3752 eol_type = str->eol_type;
|
|
70
|
3753 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
3754
|
|
|
3755 if (flags & CODING_STATE_COMPOSITE)
|
|
|
3756 dst = str->iso2022.composite_chars;
|
|
|
3757
|
|
|
3758 while (n--)
|
|
|
3759 {
|
|
|
3760 c = *src++;
|
|
|
3761 if (flags & CODING_STATE_ESCAPE)
|
|
|
3762 { /* Within ESC sequence */
|
|
181
|
3763 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
|
3764 c, &flags, 1);
|
|
70
|
3765
|
|
|
3766 if (retval)
|
|
|
3767 {
|
|
|
3768 switch (str->iso2022.esc)
|
|
|
3769 {
|
|
|
3770 case ISO_ESC_START_COMPOSITE:
|
|
|
3771 if (str->iso2022.composite_chars)
|
|
|
3772 Dynarr_reset (str->iso2022.composite_chars);
|
|
|
3773 else
|
|
|
3774 str->iso2022.composite_chars = Dynarr_new (unsigned char);
|
|
|
3775 dst = str->iso2022.composite_chars;
|
|
|
3776 break;
|
|
|
3777 case ISO_ESC_END_COMPOSITE:
|
|
|
3778 {
|
|
|
3779 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
|
3780 Bytecount len;
|
|
|
3781 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
|
3782 Dynarr_length (dst));
|
|
|
3783 dst = real_dst;
|
|
|
3784 len = set_charptr_emchar (comstr, emch);
|
|
|
3785 Dynarr_add_many (dst, comstr, len);
|
|
|
3786 break;
|
|
|
3787 }
|
|
183
|
3788
|
|
70
|
3789 case ISO_ESC_LITERAL:
|
|
|
3790 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3791 break;
|
|
|
3792
|
|
|
3793 default:
|
|
|
3794 /* Everything else handled already */
|
|
|
3795 break;
|
|
|
3796 }
|
|
|
3797 }
|
|
|
3798
|
|
|
3799 /* Attempted error recovery. */
|
|
|
3800 if (str->iso2022.output_direction_sequence)
|
|
|
3801 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
|
3802 CHARSET_RIGHT_TO_LEFT :
|
|
|
3803 CHARSET_LEFT_TO_RIGHT,
|
|
|
3804 str->codesys, dst, 0, 1);
|
|
|
3805 /* More error recovery. */
|
|
|
3806 if (!retval || str->iso2022.output_literally)
|
|
|
3807 {
|
|
|
3808 /* Output the (possibly invalid) sequence */
|
|
|
3809 int i;
|
|
|
3810 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
|
3811 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
|
3812 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3813 if (!retval)
|
|
|
3814 n++, src--;/* Repeat the loop with the same character. */
|
|
|
3815 else
|
|
|
3816 {
|
|
|
3817 /* No sense in reprocessing the final byte of the
|
|
|
3818 escape sequence; it could mess things up anyway.
|
|
|
3819 Just add it now. */
|
|
|
3820 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3821 }
|
|
|
3822 }
|
|
|
3823 ch = 0;
|
|
|
3824 }
|
|
|
3825 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
|
3826 { /* Control characters */
|
|
|
3827
|
|
|
3828 /***** Error-handling *****/
|
|
|
3829
|
|
|
3830 /* If we were in the middle of a character, dump out the
|
|
|
3831 partial character. */
|
|
|
3832 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3833
|
|
|
3834 /* If we just saw a single-shift character, dump it out.
|
|
|
3835 This may dump out the wrong sort of single-shift character,
|
|
|
3836 but least it will give an indication that something went
|
|
|
3837 wrong. */
|
|
|
3838 if (flags & CODING_STATE_SS2)
|
|
|
3839 {
|
|
|
3840 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
|
3841 flags &= ~CODING_STATE_SS2;
|
|
|
3842 }
|
|
|
3843 if (flags & CODING_STATE_SS3)
|
|
|
3844 {
|
|
|
3845 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
|
3846 flags &= ~CODING_STATE_SS3;
|
|
|
3847 }
|
|
|
3848
|
|
|
3849 /***** Now handle the control characters. *****/
|
|
|
3850
|
|
|
3851 /* Handle CR/LF */
|
|
181
|
3852 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
3853
|
|
|
3854 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3855
|
|
|
3856 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
|
3857 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3858 }
|
|
|
3859 else
|
|
|
3860 { /* Graphic characters */
|
|
|
3861 Lisp_Object charset;
|
|
|
3862 int lb;
|
|
|
3863 int reg;
|
|
|
3864
|
|
181
|
3865 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
3866
|
|
|
3867 /* Now determine the charset. */
|
|
|
3868 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
|
3869 : (flags & CODING_STATE_SS3) ? 3
|
|
|
3870 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
|
3871 : str->iso2022.register_left);
|
|
|
3872 charset = str->iso2022.charset[reg];
|
|
|
3873
|
|
|
3874 /* Error checking: */
|
|
|
3875 if (NILP (charset) || str->iso2022.invalid_designated[reg]
|
|
|
3876 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
|
3877 && XCHARSET_CHARS (charset) == 94))
|
|
|
3878 /* Mrmph. We are trying to invoke a register that has no
|
|
|
3879 or an invalid charset in it, or trying to add a character
|
|
|
3880 outside the range of the charset. Insert that char literally
|
|
|
3881 to preserve it for the output. */
|
|
|
3882 {
|
|
|
3883 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3884 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3885 }
|
|
|
3886
|
|
|
3887 else
|
|
|
3888 {
|
|
|
3889 /* Things are probably hunky-dorey. */
|
|
|
3890
|
|
|
3891 /* Fetch reverse charset, maybe. */
|
|
|
3892 if (((flags & CODING_STATE_R2L) &&
|
|
|
3893 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
|
3894 ||
|
|
|
3895 (!(flags & CODING_STATE_R2L) &&
|
|
|
3896 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
|
3897 {
|
|
183
|
3898 Lisp_Object new_charset =
|
|
70
|
3899 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
|
3900 if (!NILP (new_charset))
|
|
|
3901 charset = new_charset;
|
|
|
3902 }
|
|
|
3903
|
|
|
3904 lb = XCHARSET_LEADING_BYTE (charset);
|
|
|
3905 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3906 {
|
|
|
3907 case 1: /* ASCII */
|
|
|
3908 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3909 Dynarr_add (dst, c & 0x7F);
|
|
|
3910 break;
|
|
183
|
3911
|
|
70
|
3912 case 2: /* one-byte official */
|
|
|
3913 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3914 Dynarr_add (dst, lb);
|
|
|
3915 Dynarr_add (dst, c | 0x80);
|
|
|
3916 break;
|
|
183
|
3917
|
|
70
|
3918 case 3: /* one-byte private or two-byte official */
|
|
|
3919 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3920 {
|
|
|
3921 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3922 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
|
3923 Dynarr_add (dst, lb);
|
|
|
3924 Dynarr_add (dst, c | 0x80);
|
|
|
3925 }
|
|
|
3926 else
|
|
|
3927 {
|
|
|
3928 if (ch)
|
|
|
3929 {
|
|
|
3930 Dynarr_add (dst, lb);
|
|
|
3931 Dynarr_add (dst, ch | 0x80);
|
|
|
3932 Dynarr_add (dst, c | 0x80);
|
|
|
3933 ch = 0;
|
|
|
3934 }
|
|
|
3935 else
|
|
|
3936 ch = c;
|
|
|
3937 }
|
|
|
3938 break;
|
|
183
|
3939
|
|
70
|
3940 default: /* two-byte private */
|
|
|
3941 if (ch)
|
|
|
3942 {
|
|
|
3943 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
|
3944 Dynarr_add (dst, lb);
|
|
|
3945 Dynarr_add (dst, ch | 0x80);
|
|
|
3946 Dynarr_add (dst, c | 0x80);
|
|
|
3947 ch = 0;
|
|
|
3948 }
|
|
|
3949 else
|
|
|
3950 ch = c;
|
|
|
3951 }
|
|
|
3952 }
|
|
|
3953
|
|
|
3954 if (!ch)
|
|
|
3955 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
3956 }
|
|
|
3957
|
|
|
3958 label_continue_loop:;
|
|
|
3959 }
|
|
|
3960
|
|
|
3961 if (flags & CODING_STATE_END)
|
|
|
3962 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3963
|
|
|
3964 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
3965 }
|
|
|
3966
|
|
|
3967
|
|
|
3968 /***** ISO2022 encoder *****/
|
|
|
3969
|
|
|
3970 /* Designate CHARSET into register REG. */
|
|
|
3971
|
|
|
3972 static void
|
|
|
3973 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
|
3974 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
3975 {
|
|
|
3976 CONST char *inter94 = "()*+", *inter96= ",-./";
|
|
|
3977 int type;
|
|
|
3978 unsigned char final;
|
|
|
3979 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
|
3980
|
|
|
3981 str->iso2022.charset[reg] = charset;
|
|
|
3982 if (!CHARSETP (charset))
|
|
|
3983 /* charset might be an initial nil or t. */
|
|
|
3984 return;
|
|
|
3985 type = XCHARSET_TYPE (charset);
|
|
|
3986 final = XCHARSET_FINAL (charset);
|
|
|
3987 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
|
3988 CHARSETP (old_charset) &&
|
|
|
3989 XCHARSET_TYPE (old_charset) == type &&
|
|
|
3990 XCHARSET_FINAL (old_charset) == final)
|
|
|
3991 return;
|
|
|
3992
|
|
|
3993 str->iso2022.force_charset_on_output[reg] = 0;
|
|
|
3994
|
|
|
3995 {
|
|
|
3996 charset_conversion_spec_dynarr *dyn =
|
|
|
3997 str->codesys->iso2022.output_conv;
|
|
|
3998
|
|
|
3999 if (dyn)
|
|
|
4000 {
|
|
|
4001 int i;
|
|
183
|
4002
|
|
70
|
4003 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4004 {
|
|
|
4005 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4006 if (EQ (charset, spec->from_charset))
|
|
|
4007 charset = spec->to_charset;
|
|
|
4008 }
|
|
|
4009 }
|
|
|
4010 }
|
|
|
4011
|
|
|
4012 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4013 switch (type)
|
|
|
4014 {
|
|
|
4015 case CHARSET_TYPE_94:
|
|
|
4016 Dynarr_add (dst, inter94[reg]);
|
|
|
4017 break;
|
|
|
4018 case CHARSET_TYPE_96:
|
|
|
4019 Dynarr_add (dst, inter96[reg]);
|
|
|
4020 break;
|
|
|
4021 case CHARSET_TYPE_94X94:
|
|
|
4022 Dynarr_add (dst, '$');
|
|
|
4023 if (reg != 0
|
|
|
4024 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
|
4025 || final < '@'
|
|
|
4026 || final > 'B')
|
|
|
4027 Dynarr_add (dst, inter94[reg]);
|
|
|
4028 break;
|
|
|
4029 case CHARSET_TYPE_96X96:
|
|
|
4030 Dynarr_add (dst, '$');
|
|
|
4031 Dynarr_add (dst, inter96[reg]);
|
|
|
4032 break;
|
|
|
4033 }
|
|
|
4034 Dynarr_add (dst, final);
|
|
|
4035 }
|
|
|
4036
|
|
|
4037 static void
|
|
|
4038 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4039 {
|
|
|
4040 if (str->iso2022.register_left != 0)
|
|
|
4041 {
|
|
|
4042 Dynarr_add (dst, ISO_CODE_SI);
|
|
|
4043 str->iso2022.register_left = 0;
|
|
|
4044 }
|
|
|
4045 }
|
|
|
4046
|
|
|
4047 static void
|
|
|
4048 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4049 {
|
|
|
4050 if (str->iso2022.register_left != 1)
|
|
|
4051 {
|
|
|
4052 Dynarr_add (dst, ISO_CODE_SO);
|
|
|
4053 str->iso2022.register_left = 1;
|
|
|
4054 }
|
|
|
4055 }
|
|
|
4056
|
|
|
4057 /* Convert internally-formatted data to ISO2022 format. */
|
|
|
4058
|
|
|
4059 static void
|
|
|
4060 encode_coding_iso2022 (Lstream *encoding, CONST unsigned char *src,
|
|
|
4061 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4062 {
|
|
|
4063 unsigned char charmask, c;
|
|
181
|
4064 unsigned int flags, ch;
|
|
|
4065 enum eol_type eol_type;
|
|
70
|
4066 unsigned char char_boundary;
|
|
|
4067 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
4068 struct Lisp_Coding_System *codesys = str->codesys;
|
|
|
4069 int i;
|
|
|
4070 Lisp_Object charset;
|
|
|
4071 int half;
|
|
|
4072
|
|
|
4073 /* flags for handling composite chars. We do a little switcharoo
|
|
|
4074 on the source while we're outputting the composite char. */
|
|
173
|
4075 unsigned int saved_n = 0;
|
|
|
4076 CONST unsigned char *saved_src = NULL;
|
|
70
|
4077 int in_composite = 0;
|
|
|
4078
|
|
|
4079 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
4080 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
4081 char_boundary = str->iso2022.current_char_boundary;
|
|
|
4082 charset = str->iso2022.current_charset;
|
|
|
4083 half = str->iso2022.current_half;
|
|
|
4084
|
|
|
4085 back_to_square_n:
|
|
|
4086 while (n--)
|
|
|
4087 {
|
|
|
4088 c = *src++;
|
|
|
4089
|
|
|
4090 if (BYTE_ASCII_P (c))
|
|
|
4091 { /* Processing ASCII character */
|
|
|
4092 ch = 0;
|
|
|
4093
|
|
|
4094 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4095
|
|
|
4096 /* Make sure G0 contains ASCII */
|
|
|
4097 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
|
4098 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
|
4099 {
|
|
|
4100 ensure_normal_shift (str, dst);
|
|
|
4101 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
|
4102 }
|
|
|
4103
|
|
|
4104 /* If necessary, restore everything to the default state
|
|
|
4105 at end-of-line */
|
|
|
4106 if (c == '\n' &&
|
|
|
4107 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
|
4108 {
|
|
|
4109 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4110
|
|
|
4111 ensure_normal_shift (str, dst);
|
|
|
4112
|
|
|
4113 for (i = 0; i < 4; i++)
|
|
|
4114 {
|
|
|
4115 Lisp_Object initial_charset =
|
|
|
4116 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
4117 iso2022_designate (initial_charset, i, str, dst);
|
|
|
4118 }
|
|
|
4119 }
|
|
|
4120 if (c == '\n')
|
|
|
4121 {
|
|
181
|
4122 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
4123 Dynarr_add (dst, '\r');
|
|
181
|
4124 if (eol_type != EOL_CR)
|
|
70
|
4125 Dynarr_add (dst, c);
|
|
|
4126 }
|
|
|
4127 else
|
|
|
4128 {
|
|
|
4129 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4130 && fit_to_be_escape_quoted (c))
|
|
|
4131 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4132 Dynarr_add (dst, c);
|
|
|
4133 }
|
|
|
4134 char_boundary = 1;
|
|
|
4135 }
|
|
|
4136
|
|
|
4137 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
4138 { /* Processing Leading Byte */
|
|
|
4139 ch = 0;
|
|
|
4140 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
183
|
4141 if (LEADING_BYTE_PREFIX_P(c))
|
|
70
|
4142 ch = c;
|
|
|
4143 else if (!EQ (charset, Vcharset_control_1)
|
|
|
4144 && !EQ (charset, Vcharset_composite))
|
|
|
4145 {
|
|
|
4146 int reg;
|
|
|
4147
|
|
|
4148 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
|
4149 codesys, dst, &flags, 0);
|
|
|
4150
|
|
|
4151 /* Now determine which register to use. */
|
|
|
4152 reg = -1;
|
|
|
4153 for (i = 0; i < 4; i++)
|
|
|
4154 {
|
|
|
4155 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
|
4156 EQ (charset,
|
|
|
4157 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
|
4158 {
|
|
|
4159 reg = i;
|
|
|
4160 break;
|
|
|
4161 }
|
|
|
4162 }
|
|
|
4163
|
|
|
4164 if (reg == -1)
|
|
|
4165 {
|
|
|
4166 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
|
4167 {
|
|
|
4168 if (!NILP (str->iso2022.charset[1]) &&
|
|
|
4169 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
|
4170 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
|
4171 reg = 1;
|
|
|
4172 else if (!NILP (str->iso2022.charset[2]))
|
|
|
4173 reg = 2;
|
|
|
4174 else if (!NILP (str->iso2022.charset[3]))
|
|
|
4175 reg = 3;
|
|
|
4176 else
|
|
|
4177 reg = 0;
|
|
|
4178 }
|
|
|
4179 else
|
|
|
4180 reg = 0;
|
|
|
4181 }
|
|
|
4182
|
|
|
4183 iso2022_designate (charset, reg, str, dst);
|
|
|
4184
|
|
|
4185 /* Now invoke that register. */
|
|
|
4186 switch (reg)
|
|
|
4187 {
|
|
|
4188 case 0:
|
|
|
4189 ensure_normal_shift (str, dst);
|
|
|
4190 half = 0;
|
|
|
4191 break;
|
|
|
4192
|
|
|
4193 case 1:
|
|
|
4194 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4195 {
|
|
|
4196 ensure_shift_out (str, dst);
|
|
|
4197 half = 0;
|
|
|
4198 }
|
|
|
4199 else
|
|
|
4200 half = 1;
|
|
|
4201 break;
|
|
|
4202
|
|
|
4203 case 2:
|
|
|
4204 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
4205 {
|
|
|
4206 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4207 Dynarr_add (dst, 'N');
|
|
|
4208 half = 0;
|
|
|
4209 }
|
|
|
4210 else
|
|
|
4211 {
|
|
|
4212 Dynarr_add (dst, ISO_CODE_SS2);
|
|
|
4213 half = 1;
|
|
|
4214 }
|
|
|
4215 break;
|
|
|
4216
|
|
|
4217 case 3:
|
|
|
4218 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
4219 {
|
|
|
4220 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4221 Dynarr_add (dst, 'O');
|
|
|
4222 half = 0;
|
|
|
4223 }
|
|
|
4224 else
|
|
|
4225 {
|
|
|
4226 Dynarr_add (dst, ISO_CODE_SS3);
|
|
|
4227 half = 1;
|
|
|
4228 }
|
|
|
4229 break;
|
|
|
4230
|
|
|
4231 default:
|
|
|
4232 abort ();
|
|
|
4233 }
|
|
|
4234 }
|
|
|
4235 char_boundary = 0;
|
|
|
4236 }
|
|
|
4237 else
|
|
|
4238 { /* Processing Non-ASCII character */
|
|
|
4239 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
|
4240 char_boundary = 1;
|
|
|
4241 if (EQ (charset, Vcharset_control_1))
|
|
|
4242 {
|
|
|
4243 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4244 && fit_to_be_escape_quoted (c))
|
|
|
4245 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4246 /* you asked for it ... */
|
|
|
4247 Dynarr_add (dst, c - 0x20);
|
|
|
4248 }
|
|
|
4249 else
|
|
|
4250 {
|
|
|
4251 switch (XCHARSET_REP_BYTES (charset))
|
|
|
4252 {
|
|
|
4253 case 2:
|
|
|
4254 Dynarr_add (dst, c & charmask);
|
|
|
4255 break;
|
|
|
4256 case 3:
|
|
|
4257 if (XCHARSET_PRIVATE_P (charset))
|
|
|
4258 {
|
|
|
4259 Dynarr_add (dst, c & charmask);
|
|
|
4260 ch = 0;
|
|
|
4261 }
|
|
|
4262 else if (ch)
|
|
|
4263 {
|
|
|
4264 if (EQ (charset, Vcharset_composite))
|
|
|
4265 {
|
|
|
4266 if (in_composite)
|
|
|
4267 {
|
|
|
4268 /* #### Bother! We don't know how to
|
|
|
4269 handle this yet. */
|
|
|
4270 Dynarr_add (dst, '~');
|
|
|
4271 }
|
|
|
4272 else
|
|
|
4273 {
|
|
|
4274 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
4275 ch & 0x7F, c & 0x7F);
|
|
|
4276 Lisp_Object lstr = composite_char_string (emch);
|
|
|
4277 saved_n = n;
|
|
|
4278 saved_src = src;
|
|
|
4279 in_composite = 1;
|
|
|
4280 src = XSTRING_DATA (lstr);
|
|
|
4281 n = XSTRING_LENGTH (lstr);
|
|
|
4282 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4283 Dynarr_add (dst, '0'); /* start composing */
|
|
|
4284 }
|
|
|
4285 }
|
|
|
4286 else
|
|
|
4287 {
|
|
|
4288 Dynarr_add (dst, ch & charmask);
|
|
|
4289 Dynarr_add (dst, c & charmask);
|
|
|
4290 }
|
|
|
4291 ch = 0;
|
|
|
4292 }
|
|
|
4293 else
|
|
|
4294 {
|
|
|
4295 ch = c;
|
|
|
4296 char_boundary = 0;
|
|
|
4297 }
|
|
|
4298 break;
|
|
|
4299 case 4:
|
|
|
4300 if (ch)
|
|
|
4301 {
|
|
|
4302 Dynarr_add (dst, ch & charmask);
|
|
|
4303 Dynarr_add (dst, c & charmask);
|
|
|
4304 ch = 0;
|
|
|
4305 }
|
|
|
4306 else
|
|
|
4307 {
|
|
|
4308 ch = c;
|
|
|
4309 char_boundary = 0;
|
|
|
4310 }
|
|
|
4311 break;
|
|
|
4312 default:
|
|
|
4313 abort ();
|
|
|
4314 }
|
|
|
4315 }
|
|
|
4316 }
|
|
|
4317 }
|
|
|
4318
|
|
|
4319 if (in_composite)
|
|
|
4320 {
|
|
|
4321 n = saved_n;
|
|
|
4322 src = saved_src;
|
|
|
4323 in_composite = 0;
|
|
|
4324 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4325 Dynarr_add (dst, '1'); /* end composing */
|
|
|
4326 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
4327 }
|
|
|
4328
|
|
|
4329 if (char_boundary && flags & CODING_STATE_END)
|
|
|
4330 {
|
|
|
4331 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
4332 ensure_normal_shift (str, dst);
|
|
|
4333 for (i = 0; i < 4; i++)
|
|
|
4334 {
|
|
|
4335 Lisp_Object initial_charset =
|
|
|
4336 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
4337 iso2022_designate (initial_charset, i, str, dst);
|
|
|
4338 }
|
|
|
4339 }
|
|
183
|
4340
|
|
70
|
4341 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4342 str->iso2022.current_char_boundary = char_boundary;
|
|
|
4343 str->iso2022.current_charset = charset;
|
|
|
4344 str->iso2022.current_half = half;
|
|
|
4345
|
|
|
4346 /* Verbum caro factum est! */
|
|
|
4347 }
|
|
|
4348
|
|
|
4349
|
|
|
4350 /************************************************************************/
|
|
|
4351 /* No-conversion methods */
|
|
|
4352 /************************************************************************/
|
|
|
4353
|
|
|
4354 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
4355 contain all 256 possible byte values and that are not to be
|
|
|
4356 interpreted as being in any particular decoding. */
|
|
|
4357 static void
|
|
|
4358 decode_coding_no_conversion (Lstream *decoding, CONST unsigned char *src,
|
|
|
4359 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4360 {
|
|
|
4361 unsigned char c;
|
|
|
4362 unsigned int flags, ch;
|
|
181
|
4363 enum eol_type eol_type;
|
|
70
|
4364 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
4365
|
|
|
4366 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
4367 eol_type = str->eol_type;
|
|
70
|
4368
|
|
|
4369 while (n--)
|
|
|
4370 {
|
|
|
4371 c = *src++;
|
|
183
|
4372
|
|
181
|
4373 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
70
|
4374 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4375 label_continue_loop:;
|
|
|
4376 }
|
|
|
4377
|
|
|
4378 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
4379
|
|
|
4380 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4381 }
|
|
|
4382
|
|
|
4383 static void
|
|
|
4384 encode_coding_no_conversion (Lstream *encoding, CONST unsigned char *src,
|
|
|
4385 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4386 {
|
|
|
4387 unsigned char c;
|
|
|
4388 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
181
|
4389 unsigned int flags, ch;
|
|
|
4390 enum eol_type eol_type;
|
|
70
|
4391
|
|
|
4392 CODING_STREAM_DECOMPOSE (str, flags, ch);
|
|
181
|
4393 eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
70
|
4394
|
|
|
4395 while (n--)
|
|
|
4396 {
|
|
|
4397 c = *src++;
|
|
|
4398 if (c == '\n')
|
|
|
4399 {
|
|
181
|
4400 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
70
|
4401 Dynarr_add (dst, '\r');
|
|
181
|
4402 if (eol_type != EOL_CR)
|
|
70
|
4403 Dynarr_add (dst, '\n');
|
|
|
4404 ch = 0;
|
|
|
4405 }
|
|
|
4406 else if (BYTE_ASCII_P (c))
|
|
|
4407 {
|
|
|
4408 assert (ch == 0);
|
|
|
4409 Dynarr_add (dst, c);
|
|
|
4410 }
|
|
|
4411 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
4412 {
|
|
|
4413 assert (ch == 0);
|
|
74
|
4414 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
4415 c == LEADING_BYTE_CONTROL_1)
|
|
70
|
4416 ch = c;
|
|
|
4417 else
|
|
|
4418 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
4419 }
|
|
|
4420 else
|
|
|
4421 {
|
|
74
|
4422 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
70
|
4423 Dynarr_add (dst, c);
|
|
|
4424 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
4425 {
|
|
|
4426 assert (c < 0xC0);
|
|
|
4427 Dynarr_add (dst, c - 0x20);
|
|
|
4428 }
|
|
|
4429 /* else it should be the second or third byte of an
|
|
|
4430 untranslatable character, so ignore it */
|
|
|
4431 ch = 0;
|
|
|
4432 }
|
|
|
4433 }
|
|
|
4434
|
|
|
4435 CODING_STREAM_COMPOSE (str, flags, ch);
|
|
|
4436 }
|
|
|
4437
|
|
|
4438
|
|
|
4439 /************************************************************************/
|
|
|
4440 /* Simple internal/external functions */
|
|
|
4441 /************************************************************************/
|
|
|
4442
|
|
|
4443 static extbyte_dynarr *conversion_out_dynarr;
|
|
|
4444 static bufbyte_dynarr *conversion_in_dynarr;
|
|
|
4445
|
|
|
4446 /* Determine coding system from coding format */
|
|
|
4447
|
|
|
4448 #define PATHNAME_CODING_SYSTEM \
|
|
|
4449 ((NILP (Vpathname_coding_system) || \
|
|
|
4450 (EQ ((Vpathname_coding_system), Qbinary))) ? \
|
|
|
4451 Qnil : Fget_coding_system (Vpathname_coding_system))
|
|
183
|
4452
|
|
70
|
4453 /* #### not correct for all values of `fmt'! */
|
|
|
4454 #define FMT_CODING_SYSTEM(fmt) \
|
|
|
4455 (((fmt) == FORMAT_FILENAME) ? PATHNAME_CODING_SYSTEM : \
|
|
|
4456 ((fmt) == FORMAT_CTEXT ) ? Fget_coding_system (Qctext) : \
|
|
|
4457 ((fmt) == FORMAT_TERMINAL) ? PATHNAME_CODING_SYSTEM : \
|
|
|
4458 Qnil)
|
|
|
4459
|
|
|
4460 extern CONST Extbyte *
|
|
|
4461 convert_to_external_format (CONST Bufbyte *ptr,
|
|
|
4462 Bytecount len,
|
|
|
4463 Extcount *len_out,
|
|
|
4464 enum external_data_format fmt)
|
|
|
4465 {
|
|
|
4466 Lisp_Object coding_system = FMT_CODING_SYSTEM (fmt);
|
|
|
4467
|
|
|
4468 if (!conversion_out_dynarr)
|
|
|
4469 conversion_out_dynarr = Dynarr_new (Extbyte);
|
|
|
4470 else
|
|
|
4471 Dynarr_reset (conversion_out_dynarr);
|
|
|
4472
|
|
|
4473 if (NILP (coding_system))
|
|
183
|
4474 {
|
|
70
|
4475 CONST Bufbyte *end = ptr + len;
|
|
|
4476
|
|
|
4477 for (; ptr < end;)
|
|
|
4478 {
|
|
|
4479 Bufbyte c =
|
|
74
|
4480 (BYTE_ASCII_P (*ptr)) ? *ptr :
|
|
|
4481 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
|
|
|
4482 (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
|
|
70
|
4483 '~';
|
|
|
4484
|
|
|
4485 Dynarr_add (conversion_out_dynarr, (Extbyte) c);
|
|
|
4486 INC_CHARPTR (ptr);
|
|
|
4487 }
|
|
183
|
4488
|
|
70
|
4489 #ifdef ERROR_CHECK_BUFPOS
|
|
|
4490 assert (ptr == end);
|
|
|
4491 #endif
|
|
|
4492 }
|
|
|
4493 else
|
|
|
4494 {
|
|
|
4495 Lisp_Object instream =
|
|
|
4496 make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
4497 Lisp_Object outstream = make_dynarr_output_stream
|
|
|
4498 ((unsigned_char_dynarr *) conversion_out_dynarr);
|
|
|
4499 struct gcpro gcpro1, gcpro2;
|
|
|
4500 char tempbuf[1024]; /* some random amount */
|
|
|
4501
|
|
|
4502 outstream =
|
|
|
4503 make_encoding_output_stream (XLSTREAM (outstream), coding_system);
|
|
|
4504 GCPRO2 (instream, outstream); /* Necessary?? */
|
|
|
4505 while (1)
|
|
|
4506 {
|
|
|
4507 int size_in_bytes = Lstream_read (XLSTREAM (instream),
|
|
|
4508 tempbuf, sizeof (tempbuf));
|
|
|
4509 if (!size_in_bytes)
|
|
|
4510 break;
|
|
|
4511 Lstream_write (XLSTREAM (outstream), tempbuf, size_in_bytes);
|
|
|
4512 }
|
|
|
4513 Lstream_close (XLSTREAM (instream));
|
|
|
4514 Lstream_close (XLSTREAM (outstream));
|
|
|
4515 UNGCPRO;
|
|
|
4516 }
|
|
|
4517
|
|
|
4518 *len_out = Dynarr_length (conversion_out_dynarr);
|
|
|
4519 Dynarr_add (conversion_out_dynarr, 0); /* remember to zero-terminate! */
|
|
|
4520 return Dynarr_atp (conversion_out_dynarr, 0);
|
|
|
4521 }
|
|
|
4522
|
|
|
4523 extern CONST Bufbyte *
|
|
|
4524 convert_from_external_format (CONST Extbyte *ptr,
|
|
|
4525 Extcount len,
|
|
|
4526 Bytecount *len_out,
|
|
|
4527 enum external_data_format fmt)
|
|
|
4528 {
|
|
|
4529 Lisp_Object coding_system = FMT_CODING_SYSTEM (fmt);
|
|
183
|
4530
|
|
70
|
4531 if (!conversion_in_dynarr)
|
|
|
4532 conversion_in_dynarr = Dynarr_new (Bufbyte);
|
|
|
4533 else
|
|
|
4534 Dynarr_reset (conversion_in_dynarr);
|
|
|
4535
|
|
|
4536 if (NILP (coding_system))
|
|
|
4537 {
|
|
|
4538 CONST Extbyte *end = ptr + len;
|
|
|
4539 for (; ptr < end; ptr++)
|
|
|
4540 {
|
|
|
4541 Extbyte c = *ptr;
|
|
|
4542 DECODE_ADD_BINARY_CHAR (c, conversion_in_dynarr);
|
|
|
4543 }
|
|
|
4544 }
|
|
|
4545 else
|
|
|
4546 {
|
|
|
4547 Lisp_Object instream =
|
|
|
4548 make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
4549 Lisp_Object outstream = make_dynarr_output_stream
|
|
|
4550 ((unsigned_char_dynarr *) conversion_in_dynarr);
|
|
|
4551 struct gcpro gcpro1, gcpro2;
|
|
|
4552 char tempbuf[1024]; /* some random amount */
|
|
183
|
4553
|
|
70
|
4554 outstream =
|
|
|
4555 make_decoding_output_stream (XLSTREAM (outstream), coding_system);
|
|
|
4556 GCPRO2 (instream, outstream); /* Necessary?? */
|
|
|
4557 while (1)
|
|
|
4558 {
|
|
|
4559 int size_in_bytes = Lstream_read (XLSTREAM (instream),
|
|
|
4560 tempbuf, sizeof (tempbuf));
|
|
|
4561 if (!size_in_bytes)
|
|
|
4562 break;
|
|
|
4563 Lstream_write (XLSTREAM (outstream), tempbuf, size_in_bytes);
|
|
|
4564 }
|
|
|
4565 Lstream_close (XLSTREAM (instream));
|
|
|
4566 Lstream_close (XLSTREAM (outstream));
|
|
|
4567 UNGCPRO;
|
|
|
4568 }
|
|
|
4569
|
|
|
4570 *len_out = Dynarr_length (conversion_in_dynarr);
|
|
|
4571 Dynarr_add (conversion_in_dynarr, 0); /* remember to zero-terminate! */
|
|
|
4572 return Dynarr_atp (conversion_in_dynarr, 0);
|
|
|
4573 }
|
|
|
4574
|
|
|
4575
|
|
|
4576 /************************************************************************/
|
|
|
4577 /* Initialization */
|
|
|
4578 /************************************************************************/
|
|
|
4579
|
|
|
4580 void
|
|
|
4581 syms_of_mule_coding (void)
|
|
|
4582 {
|
|
110
|
4583 defsymbol (&Qbuffer_file_coding_system, "buffer-file-coding-system");
|
|
70
|
4584 deferror (&Qcoding_system_error, "coding-system-error",
|
|
|
4585 "Coding-system error", Qio_error);
|
|
|
4586
|
|
|
4587 DEFSUBR (Fcoding_system_p);
|
|
|
4588 DEFSUBR (Ffind_coding_system);
|
|
|
4589 DEFSUBR (Fget_coding_system);
|
|
|
4590 DEFSUBR (Fcoding_system_list);
|
|
|
4591 DEFSUBR (Fcoding_system_name);
|
|
|
4592 DEFSUBR (Fmake_coding_system);
|
|
|
4593 DEFSUBR (Fcopy_coding_system);
|
|
|
4594 DEFSUBR (Fsubsidiary_coding_system);
|
|
|
4595
|
|
|
4596 DEFSUBR (Fcoding_system_type);
|
|
|
4597 DEFSUBR (Fcoding_system_doc_string);
|
|
|
4598 DEFSUBR (Fcoding_system_property);
|
|
|
4599
|
|
|
4600 DEFSUBR (Fcoding_category_list);
|
|
|
4601 DEFSUBR (Fset_coding_priority_list);
|
|
|
4602 DEFSUBR (Fcoding_priority_list);
|
|
|
4603 DEFSUBR (Fset_coding_category_system);
|
|
|
4604 DEFSUBR (Fcoding_category_system);
|
|
183
|
4605
|
|
70
|
4606 DEFSUBR (Fdetect_coding_region);
|
|
|
4607 DEFSUBR (Fdecode_coding_region);
|
|
|
4608 DEFSUBR (Fencode_coding_region);
|
|
|
4609 DEFSUBR (Fdecode_shift_jis_char);
|
|
|
4610 DEFSUBR (Fencode_shift_jis_char);
|
|
|
4611 DEFSUBR (Fdecode_big5_char);
|
|
|
4612 DEFSUBR (Fencode_big5_char);
|
|
|
4613
|
|
|
4614 defsymbol (&Qcoding_system_p, "coding-system-p");
|
|
|
4615
|
|
|
4616 defsymbol (&Qbig5, "big5");
|
|
|
4617 defsymbol (&Qshift_jis, "shift-jis");
|
|
|
4618 defsymbol (&Qno_conversion, "no-conversion");
|
|
|
4619 defsymbol (&Qccl, "ccl");
|
|
|
4620 defsymbol (&Qiso2022, "iso2022");
|
|
|
4621
|
|
|
4622 defsymbol (&Qmnemonic, "mnemonic");
|
|
|
4623 defsymbol (&Qeol_type, "eol-type");
|
|
|
4624 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
|
4625 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
|
4626
|
|
|
4627 defsymbol (&Qcr, "cr");
|
|
|
4628 defsymbol (&Qlf, "lf");
|
|
|
4629 defsymbol (&Qcrlf, "crlf");
|
|
|
4630 defsymbol (&Qeol_cr, "eol-cr");
|
|
|
4631 defsymbol (&Qeol_lf, "eol-lf");
|
|
|
4632 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
|
4633
|
|
|
4634 defsymbol (&Qcharset_g0, "charset-g0");
|
|
|
4635 defsymbol (&Qcharset_g1, "charset-g1");
|
|
|
4636 defsymbol (&Qcharset_g2, "charset-g2");
|
|
|
4637 defsymbol (&Qcharset_g3, "charset-g3");
|
|
|
4638 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
|
4639 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
|
4640 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
|
4641 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
|
4642 defsymbol (&Qshort, "short");
|
|
|
4643 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
|
4644 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
|
4645 defsymbol (&Qseven, "seven");
|
|
|
4646 defsymbol (&Qlock_shift, "lock-shift");
|
|
|
4647 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
|
4648 defsymbol (&Qescape_quoted, "escape-quoted");
|
|
|
4649 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
|
4650 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
|
|
4651
|
|
|
4652 defsymbol (&Qencode, "encode");
|
|
|
4653 defsymbol (&Qdecode, "decode");
|
|
|
4654
|
|
|
4655 defsymbol (&Qctext, "ctext");
|
|
|
4656
|
|
|
4657 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
|
4658 "shift-jis");
|
|
|
4659 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
|
4660 "iso-7");
|
|
|
4661 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
|
4662 "iso-8-designate");
|
|
|
4663 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
|
4664 "iso-8-1");
|
|
|
4665 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
|
4666 "iso-8-2");
|
|
|
4667 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
|
4668 "iso-lock-shift");
|
|
|
4669 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
|
4670 "big5");
|
|
|
4671 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
|
4672 "no-conversion");
|
|
|
4673 }
|
|
|
4674
|
|
|
4675 void
|
|
|
4676 lstream_type_create_mule_coding (void)
|
|
|
4677 {
|
|
|
4678 LSTREAM_HAS_METHOD (decoding, reader);
|
|
|
4679 LSTREAM_HAS_METHOD (decoding, writer);
|
|
|
4680 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
|
4681 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
|
4682 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
|
4683 LSTREAM_HAS_METHOD (decoding, closer);
|
|
|
4684 LSTREAM_HAS_METHOD (decoding, marker);
|
|
|
4685
|
|
|
4686 LSTREAM_HAS_METHOD (encoding, reader);
|
|
|
4687 LSTREAM_HAS_METHOD (encoding, writer);
|
|
|
4688 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
|
4689 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
|
4690 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
|
4691 LSTREAM_HAS_METHOD (encoding, closer);
|
|
|
4692 LSTREAM_HAS_METHOD (encoding, marker);
|
|
|
4693 }
|
|
|
4694
|
|
|
4695 void
|
|
|
4696 vars_of_mule_coding (void)
|
|
|
4697 {
|
|
|
4698 int i;
|
|
|
4699
|
|
|
4700 /* Initialize to something reasonable ... */
|
|
|
4701 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
4702 {
|
|
|
4703 coding_category_system[i] = Qnil;
|
|
|
4704 coding_category_by_priority[i] = i;
|
|
|
4705 }
|
|
183
|
4706
|
|
70
|
4707 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
4708 Coding system used for TTY keyboard input.
|
|
|
4709 Not used under a windowing system.
|
|
|
4710 */ );
|
|
|
4711 Vkeyboard_coding_system = Qnil;
|
|
|
4712
|
|
|
4713 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
4714 Coding system used for TTY display output.
|
|
|
4715 Not used under a windowing system.
|
|
|
4716 */ );
|
|
|
4717 Vterminal_coding_system = Qnil;
|
|
|
4718
|
|
120
|
4719 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
|
4720 Overriding coding system used when writing a file or process.
|
|
|
4721 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
4722 the coding system that will be used when a file or process is read
|
|
|
4723 in, and overrides `buffer-file-coding-system-for-read',
|
|
|
4724 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
|
4725 this one for permanent changes to the environment.
|
|
70
|
4726 */ );
|
|
120
|
4727 Vcoding_system_for_read = Qnil;
|
|
|
4728
|
|
|
4729 DEFVAR_LISP ("coding-system-for-write",
|
|
|
4730 &Vcoding_system_for_write /*
|
|
|
4731 Overriding coding system used when writing a file or process.
|
|
|
4732 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
4733 the coding system that will be used when a file or process is wrote
|
|
|
4734 in, and overrides `buffer-file-coding-system',
|
|
|
4735 `write-region-pre-hook', etc. Use those variables instead of this one
|
|
|
4736 for permanent changes to the environment.
|
|
70
|
4737 */ );
|
|
120
|
4738 Vcoding_system_for_write = Qnil;
|
|
70
|
4739
|
|
|
4740 DEFVAR_LISP ("pathname-coding-system", &Vpathname_coding_system /*
|
|
|
4741 Coding system used to convert pathnames when accessing files.
|
|
|
4742 */ );
|
|
|
4743 Vpathname_coding_system = Qnil;
|
|
114
|
4744
|
|
|
4745 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
|
4746 Non-nil means the buffer contents are regarded as multi-byte form
|
|
|
4747 of characters, not a binary code. This affects the display, file I/O,
|
|
|
4748 and behaviors of various editing commands.
|
|
|
4749
|
|
|
4750 Setting this to nil does not do anything.
|
|
|
4751 */ );
|
|
|
4752 enable_multibyte_characters = 1;
|
|
70
|
4753 }
|
|
|
4754
|
|
|
4755 void
|
|
|
4756 complex_vars_of_mule_coding (void)
|
|
|
4757 {
|
|
|
4758 staticpro (&Vcoding_system_hashtable);
|
|
|
4759 Vcoding_system_hashtable = make_lisp_hashtable (50, HASHTABLE_NONWEAK,
|
|
|
4760 HASHTABLE_EQ);
|
|
|
4761
|
|
|
4762 the_codesys_prop_dynarr = Dynarr_new (struct codesys_prop);
|
|
|
4763
|
|
|
4764 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
|
4765 { \
|
|
|
4766 struct codesys_prop csp; \
|
|
|
4767 csp.sym = (Sym); \
|
|
|
4768 csp.prop_type = (Prop_Type); \
|
|
|
4769 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
|
4770 } while (0)
|
|
|
4771
|
|
|
4772 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
|
4773 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
|
4774 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
|
4775 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
|
4776 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
|
4777 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
|
4778 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
|
4779
|
|
|
4780 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
|
4781 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
|
4782 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
|
4783 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
|
4784 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
|
4785 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
|
4786 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
|
4787 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
|
4788 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
|
4789 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
|
4790 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
|
4791 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
|
4792 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
|
4793 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
|
4794 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
|
4795 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
|
4796 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
|
4797
|
|
|
4798 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
|
4799 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
|
4800
|
|
|
4801 /* Need to create this here or we're really screwed. */
|
|
|
4802 Fmake_coding_system (Qno_conversion, Qno_conversion, build_string ("No conversion"),
|
|
|
4803 list2 (Qmnemonic, build_string ("Noconv")));
|
|
|
4804
|
|
|
4805 Fcopy_coding_system (Fcoding_system_property (Qno_conversion, Qeol_lf),
|
|
|
4806 Qbinary);
|
|
|
4807
|
|
|
4808 /* Need this for bootstrapping */
|
|
|
4809 coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
|
|
4810 Fget_coding_system (Qno_conversion);
|
|
|
4811 }
|
