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259
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1 /* Code conversion functions.
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2 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.3. Not in FSF. */
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23
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298
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24 /* Rewritten by Ben Wing <ben@xemacs.org>. */
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259
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25
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26 #include <config.h>
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27 #include "lisp.h"
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398
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28
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259
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29 #include "buffer.h"
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30 #include "elhash.h"
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31 #include "insdel.h"
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32 #include "lstream.h"
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398
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33 #include "opaque.h"
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259
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34 #ifdef MULE
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35 #include "mule-ccl.h"
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396
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36 #include "chartab.h"
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259
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37 #endif
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38 #include "file-coding.h"
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39
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398
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40 Lisp_Object Qcoding_system_error;
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259
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41
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42 Lisp_Object Vkeyboard_coding_system;
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43 Lisp_Object Vterminal_coding_system;
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44 Lisp_Object Vcoding_system_for_read;
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45 Lisp_Object Vcoding_system_for_write;
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46 Lisp_Object Vfile_name_coding_system;
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47
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48 /* Table of symbols identifying each coding category. */
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49 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST + 1];
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50
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398
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51
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52
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53 struct file_coding_dump {
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54 /* Coding system currently associated with each coding category. */
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55 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
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56
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57 /* Table of all coding categories in decreasing order of priority.
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58 This describes a permutation of the possible coding categories. */
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59 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
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60
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61 #ifdef MULE
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62 Lisp_Object ucs_to_mule_table[65536];
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63 #endif
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64 } *fcd;
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65
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66 static const struct lrecord_description fcd_description_1[] = {
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67 { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, coding_category_system), CODING_CATEGORY_LAST + 1 },
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68 #ifdef MULE
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69 { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, ucs_to_mule_table), 65536 },
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70 #endif
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71 { XD_END }
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72 };
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73
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74 static const struct struct_description fcd_description = {
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75 sizeof (struct file_coding_dump),
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76 fcd_description_1
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77 };
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78
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79 Lisp_Object mule_to_ucs_table;
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80
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81 Lisp_Object Qcoding_systemp;
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82
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83 Lisp_Object Qraw_text, Qno_conversion, Qccl, Qiso2022;
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259
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84 /* Qinternal in general.c */
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85
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86 Lisp_Object Qmnemonic, Qeol_type;
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87 Lisp_Object Qcr, Qcrlf, Qlf;
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88 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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89 Lisp_Object Qpost_read_conversion;
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90 Lisp_Object Qpre_write_conversion;
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91
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92 #ifdef MULE
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396
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93 Lisp_Object Qucs4, Qutf8;
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259
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94 Lisp_Object Qbig5, Qshift_jis;
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95 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
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96 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
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97 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
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98 Lisp_Object Qno_iso6429;
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99 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
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398
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100 Lisp_Object Qescape_quoted;
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259
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101 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
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263
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102 #endif
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103 Lisp_Object Qencode, Qdecode;
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259
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104
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380
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105 Lisp_Object Vcoding_system_hash_table;
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259
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106
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107 int enable_multibyte_characters;
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108
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109 #ifdef MULE
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110 /* Additional information used by the ISO2022 decoder and detector. */
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111 struct iso2022_decoder
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112 {
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113 /* CHARSET holds the character sets currently assigned to the G0
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114 through G3 variables. It is initialized from the array
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115 INITIAL_CHARSET in CODESYS. */
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116 Lisp_Object charset[4];
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117
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118 /* Which registers are currently invoked into the left (GL) and
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119 right (GR) halves of the 8-bit encoding space? */
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120 int register_left, register_right;
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121
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122 /* ISO_ESC holds a value indicating part of an escape sequence
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123 that has already been seen. */
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124 enum iso_esc_flag esc;
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125
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126 /* This records the bytes we've seen so far in an escape sequence,
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127 in case the sequence is invalid (we spit out the bytes unchanged). */
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128 unsigned char esc_bytes[8];
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129
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130 /* Index for next byte to store in ISO escape sequence. */
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131 int esc_bytes_index;
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132
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396
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133 #ifdef ENABLE_COMPOSITE_CHARS
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259
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134 /* Stuff seen so far when composing a string. */
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135 unsigned_char_dynarr *composite_chars;
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396
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136 #endif
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259
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137
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138 /* If we saw an invalid designation sequence for a particular
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139 register, we flag it here and switch to ASCII. The next time we
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140 see a valid designation for this register, we turn off the flag
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141 and do the designation normally, but pretend the sequence was
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142 invalid. The effect of all this is that (most of the time) the
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143 escape sequences for both the switch to the unknown charset, and
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144 the switch back to the known charset, get inserted literally into
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145 the buffer and saved out as such. The hope is that we can
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146 preserve the escape sequences so that the resulting written out
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147 file makes sense. If we don't do any of this, the designation
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148 to the invalid charset will be preserved but that switch back
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149 to the known charset will probably get eaten because it was
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150 the same charset that was already present in the register. */
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151 unsigned char invalid_designated[4];
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152
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153 /* We try to do similar things as above for direction-switching
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154 sequences. If we encountered a direction switch while an
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155 invalid designation was present, or an invalid designation
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156 just after a direction switch (i.e. no valid designation
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157 encountered yet), we insert the direction-switch escape
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158 sequence literally into the output stream, and later on
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159 insert the corresponding direction-restoring escape sequence
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160 literally also. */
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161 unsigned int switched_dir_and_no_valid_charset_yet :1;
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162 unsigned int invalid_switch_dir :1;
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163
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164 /* Tells the decoder to output the escape sequence literally
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165 even though it was valid. Used in the games we play to
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166 avoid lossage when we encounter invalid designations. */
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167 unsigned int output_literally :1;
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168 /* We encountered a direction switch followed by an invalid
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169 designation. We didn't output the direction switch
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170 literally because we didn't know about the invalid designation;
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171 but we have to do so now. */
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172 unsigned int output_direction_sequence :1;
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173 };
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272
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174 #endif /* MULE */
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175 EXFUN (Fcopy_coding_system, 2);
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259
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176 #ifdef MULE
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177 struct detection_state;
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178 static int detect_coding_sjis (struct detection_state *st,
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398
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179 const unsigned char *src,
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259
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180 unsigned int n);
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181 static void decode_coding_sjis (Lstream *decoding,
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398
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182 const unsigned char *src,
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259
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183 unsigned_char_dynarr *dst,
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184 unsigned int n);
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185 static void encode_coding_sjis (Lstream *encoding,
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398
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186 const unsigned char *src,
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259
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187 unsigned_char_dynarr *dst,
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188 unsigned int n);
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189 static int detect_coding_big5 (struct detection_state *st,
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398
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190 const unsigned char *src,
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259
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191 unsigned int n);
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192 static void decode_coding_big5 (Lstream *decoding,
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398
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193 const unsigned char *src,
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259
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194 unsigned_char_dynarr *dst, unsigned int n);
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195 static void encode_coding_big5 (Lstream *encoding,
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398
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196 const unsigned char *src,
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259
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197 unsigned_char_dynarr *dst, unsigned int n);
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396
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198 static int detect_coding_ucs4 (struct detection_state *st,
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398
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199 const unsigned char *src,
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396
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200 unsigned int n);
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201 static void decode_coding_ucs4 (Lstream *decoding,
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398
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202 const unsigned char *src,
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396
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203 unsigned_char_dynarr *dst, unsigned int n);
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204 static void encode_coding_ucs4 (Lstream *encoding,
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398
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205 const unsigned char *src,
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396
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206 unsigned_char_dynarr *dst, unsigned int n);
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207 static int detect_coding_utf8 (struct detection_state *st,
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398
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208 const unsigned char *src,
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396
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209 unsigned int n);
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210 static void decode_coding_utf8 (Lstream *decoding,
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398
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211 const unsigned char *src,
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396
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212 unsigned_char_dynarr *dst, unsigned int n);
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213 static void encode_coding_utf8 (Lstream *encoding,
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398
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214 const unsigned char *src,
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396
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215 unsigned_char_dynarr *dst, unsigned int n);
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259
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216 static int postprocess_iso2022_mask (int mask);
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217 static void reset_iso2022 (Lisp_Object coding_system,
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218 struct iso2022_decoder *iso);
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219 static int detect_coding_iso2022 (struct detection_state *st,
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398
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220 const unsigned char *src,
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259
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221 unsigned int n);
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222 static void decode_coding_iso2022 (Lstream *decoding,
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398
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223 const unsigned char *src,
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259
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224 unsigned_char_dynarr *dst, unsigned int n);
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225 static void encode_coding_iso2022 (Lstream *encoding,
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398
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226 const unsigned char *src,
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259
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227 unsigned_char_dynarr *dst, unsigned int n);
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228 #endif /* MULE */
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229 static void decode_coding_no_conversion (Lstream *decoding,
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398
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230 const unsigned char *src,
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259
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231 unsigned_char_dynarr *dst,
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232 unsigned int n);
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233 static void encode_coding_no_conversion (Lstream *encoding,
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398
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234 const unsigned char *src,
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259
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235 unsigned_char_dynarr *dst,
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236 unsigned int n);
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398
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237 static void mule_decode (Lstream *decoding, const unsigned char *src,
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259
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238 unsigned_char_dynarr *dst, unsigned int n);
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398
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239 static void mule_encode (Lstream *encoding, const unsigned char *src,
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259
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240 unsigned_char_dynarr *dst, unsigned int n);
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241
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242 typedef struct codesys_prop codesys_prop;
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243 struct codesys_prop
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244 {
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245 Lisp_Object sym;
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246 int prop_type;
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247 };
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248
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249 typedef struct
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250 {
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251 Dynarr_declare (codesys_prop);
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252 } codesys_prop_dynarr;
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253
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398
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254 static const struct lrecord_description codesys_prop_description_1[] = {
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255 { XD_LISP_OBJECT, offsetof (codesys_prop, sym) },
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256 { XD_END }
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257 };
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258
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259 static const struct struct_description codesys_prop_description = {
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260 sizeof (codesys_prop),
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261 codesys_prop_description_1
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262 };
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263
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264 static const struct lrecord_description codesys_prop_dynarr_description_1[] = {
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265 XD_DYNARR_DESC (codesys_prop_dynarr, &codesys_prop_description),
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266 { XD_END }
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267 };
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268
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269 static const struct struct_description codesys_prop_dynarr_description = {
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270 sizeof (codesys_prop_dynarr),
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271 codesys_prop_dynarr_description_1
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272 };
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273
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259
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274 codesys_prop_dynarr *the_codesys_prop_dynarr;
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275
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276 enum codesys_prop_enum
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277 {
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278 CODESYS_PROP_ALL_OK,
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279 CODESYS_PROP_ISO2022,
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280 CODESYS_PROP_CCL
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281 };
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282
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283
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284 /************************************************************************/
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285 /* Coding system functions */
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286 /************************************************************************/
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287
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398
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288 static Lisp_Object mark_coding_system (Lisp_Object);
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259
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289 static void print_coding_system (Lisp_Object, Lisp_Object, int);
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290 static void finalize_coding_system (void *header, int for_disksave);
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291
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398
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292 #ifdef MULE
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293 static const struct lrecord_description ccs_description_1[] = {
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294 { XD_LISP_OBJECT, offsetof (charset_conversion_spec, from_charset) },
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295 { XD_LISP_OBJECT, offsetof (charset_conversion_spec, to_charset) },
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296 { XD_END }
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297 };
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298
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299 static const struct struct_description ccs_description = {
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300 sizeof (charset_conversion_spec),
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301 ccs_description_1
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302 };
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303
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304 static const struct lrecord_description ccsd_description_1[] = {
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305 XD_DYNARR_DESC (charset_conversion_spec_dynarr, &ccs_description),
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306 { XD_END }
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307 };
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308
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309 static const struct struct_description ccsd_description = {
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310 sizeof (charset_conversion_spec_dynarr),
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311 ccsd_description_1
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312 };
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313 #endif
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314
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315 static const struct lrecord_description coding_system_description[] = {
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316 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, name) },
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317 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, doc_string) },
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318 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, mnemonic) },
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319 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, post_read_conversion) },
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320 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, pre_write_conversion) },
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321 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_lf) },
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322 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_crlf) },
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323 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_cr) },
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324 #ifdef MULE
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325 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, iso2022.initial_charset), 4 },
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326 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
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327 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
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328 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.decode) },
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329 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.encode) },
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330 #endif
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331 { XD_END }
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332 };
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333
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259
|
334 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
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|
|
335 mark_coding_system, print_coding_system,
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|
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336 finalize_coding_system,
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398
|
337 0, 0, coding_system_description,
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|
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338 Lisp_Coding_System);
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259
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339
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340 static Lisp_Object
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398
|
341 mark_coding_system (Lisp_Object obj)
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|
259
|
342 {
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396
|
343 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
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|
259
|
344
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398
|
345 mark_object (CODING_SYSTEM_NAME (codesys));
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|
346 mark_object (CODING_SYSTEM_DOC_STRING (codesys));
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|
347 mark_object (CODING_SYSTEM_MNEMONIC (codesys));
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348 mark_object (CODING_SYSTEM_EOL_LF (codesys));
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349 mark_object (CODING_SYSTEM_EOL_CRLF (codesys));
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350 mark_object (CODING_SYSTEM_EOL_CR (codesys));
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259
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351
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352 switch (CODING_SYSTEM_TYPE (codesys))
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|
|
353 {
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|
354 #ifdef MULE
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|
355 int i;
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|
356 case CODESYS_ISO2022:
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|
357 for (i = 0; i < 4; i++)
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|
398
|
358 mark_object (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
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|
259
|
359 if (codesys->iso2022.input_conv)
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360 {
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|
361 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
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|
|
362 {
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|
|
363 struct charset_conversion_spec *ccs =
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|
|
364 Dynarr_atp (codesys->iso2022.input_conv, i);
|
|
398
|
365 mark_object (ccs->from_charset);
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|
|
366 mark_object (ccs->to_charset);
|
|
259
|
367 }
|
|
|
368 }
|
|
|
369 if (codesys->iso2022.output_conv)
|
|
|
370 {
|
|
|
371 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
|
|
|
372 {
|
|
|
373 struct charset_conversion_spec *ccs =
|
|
|
374 Dynarr_atp (codesys->iso2022.output_conv, i);
|
|
398
|
375 mark_object (ccs->from_charset);
|
|
|
376 mark_object (ccs->to_charset);
|
|
259
|
377 }
|
|
|
378 }
|
|
|
379 break;
|
|
|
380
|
|
|
381 case CODESYS_CCL:
|
|
398
|
382 mark_object (CODING_SYSTEM_CCL_DECODE (codesys));
|
|
|
383 mark_object (CODING_SYSTEM_CCL_ENCODE (codesys));
|
|
259
|
384 break;
|
|
272
|
385 #endif /* MULE */
|
|
259
|
386 default:
|
|
|
387 break;
|
|
|
388 }
|
|
|
389
|
|
398
|
390 mark_object (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
|
|
259
|
391 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
|
|
|
392 }
|
|
|
393
|
|
|
394 static void
|
|
|
395 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
|
|
|
396 int escapeflag)
|
|
|
397 {
|
|
396
|
398 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
259
|
399 if (print_readably)
|
|
|
400 error ("printing unreadable object #<coding_system 0x%x>",
|
|
|
401 c->header.uid);
|
|
|
402
|
|
|
403 write_c_string ("#<coding_system ", printcharfun);
|
|
|
404 print_internal (c->name, printcharfun, 1);
|
|
|
405 write_c_string (">", printcharfun);
|
|
|
406 }
|
|
|
407
|
|
|
408 static void
|
|
|
409 finalize_coding_system (void *header, int for_disksave)
|
|
|
410 {
|
|
396
|
411 Lisp_Coding_System *c = (Lisp_Coding_System *) header;
|
|
259
|
412 /* Since coding systems never go away, this function is not
|
|
|
413 necessary. But it would be necessary if we changed things
|
|
|
414 so that coding systems could go away. */
|
|
|
415 if (!for_disksave) /* see comment in lstream.c */
|
|
|
416 {
|
|
|
417 switch (CODING_SYSTEM_TYPE (c))
|
|
|
418 {
|
|
|
419 #ifdef MULE
|
|
|
420 case CODESYS_ISO2022:
|
|
|
421 if (c->iso2022.input_conv)
|
|
|
422 {
|
|
|
423 Dynarr_free (c->iso2022.input_conv);
|
|
|
424 c->iso2022.input_conv = 0;
|
|
|
425 }
|
|
|
426 if (c->iso2022.output_conv)
|
|
|
427 {
|
|
|
428 Dynarr_free (c->iso2022.output_conv);
|
|
|
429 c->iso2022.output_conv = 0;
|
|
|
430 }
|
|
|
431 break;
|
|
272
|
432 #endif /* MULE */
|
|
259
|
433 default:
|
|
|
434 break;
|
|
|
435 }
|
|
|
436 }
|
|
|
437 }
|
|
|
438
|
|
398
|
439 static eol_type_t
|
|
259
|
440 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
441 {
|
|
|
442 CHECK_SYMBOL (symbol);
|
|
|
443 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
444 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
445 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
446 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
447
|
|
|
448 signal_simple_error ("Unrecognized eol type", symbol);
|
|
|
449 return EOL_AUTODETECT; /* not reached */
|
|
|
450 }
|
|
|
451
|
|
|
452 static Lisp_Object
|
|
398
|
453 eol_type_to_symbol (eol_type_t type)
|
|
259
|
454 {
|
|
|
455 switch (type)
|
|
|
456 {
|
|
380
|
457 default: abort ();
|
|
259
|
458 case EOL_LF: return Qlf;
|
|
|
459 case EOL_CRLF: return Qcrlf;
|
|
|
460 case EOL_CR: return Qcr;
|
|
|
461 case EOL_AUTODETECT: return Qnil;
|
|
|
462 }
|
|
|
463 }
|
|
|
464
|
|
|
465 static void
|
|
396
|
466 setup_eol_coding_systems (Lisp_Coding_System *codesys)
|
|
259
|
467 {
|
|
272
|
468 Lisp_Object codesys_obj;
|
|
259
|
469 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
|
|
|
470 char *codesys_name = (char *) alloca (len + 7);
|
|
261
|
471 int mlen = -1;
|
|
265
|
472 char *codesys_mnemonic=0;
|
|
259
|
473
|
|
|
474 Lisp_Object codesys_name_sym, sub_codesys_obj;
|
|
|
475
|
|
|
476 /* kludge */
|
|
|
477
|
|
|
478 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
479
|
|
|
480 memcpy (codesys_name,
|
|
|
481 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
|
|
|
482
|
|
261
|
483 if (STRINGP (CODING_SYSTEM_MNEMONIC (codesys)))
|
|
|
484 {
|
|
272
|
485 mlen = XSTRING_LENGTH (CODING_SYSTEM_MNEMONIC (codesys));
|
|
261
|
486 codesys_mnemonic = (char *) alloca (mlen + 7);
|
|
|
487 memcpy (codesys_mnemonic,
|
|
|
488 XSTRING_DATA (CODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
|
489 }
|
|
259
|
490
|
|
272
|
491 #define DEFINE_SUB_CODESYS(op_sys, op_sys_abbr, Type) do { \
|
|
|
492 strcpy (codesys_name + len, "-" op_sys); \
|
|
|
493 if (mlen != -1) \
|
|
|
494 strcpy (codesys_mnemonic + mlen, op_sys_abbr); \
|
|
|
495 codesys_name_sym = intern (codesys_name); \
|
|
|
496 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
|
|
|
497 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
|
|
|
498 if (mlen != -1) \
|
|
|
499 XCODING_SYSTEM_MNEMONIC(sub_codesys_obj) = \
|
|
|
500 build_string (codesys_mnemonic); \
|
|
|
501 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
|
|
259
|
502 } while (0)
|
|
|
503
|
|
|
504 DEFINE_SUB_CODESYS("unix", "", EOL_LF);
|
|
263
|
505 DEFINE_SUB_CODESYS("dos", ":T", EOL_CRLF);
|
|
|
506 DEFINE_SUB_CODESYS("mac", ":t", EOL_CR);
|
|
259
|
507 }
|
|
|
508
|
|
|
509 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
272
|
510 Return t if OBJECT is a coding system.
|
|
259
|
511 A coding system is an object that defines how text containing multiple
|
|
|
512 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
513 The coding system is used to decode the stream into a series of
|
|
|
514 characters (which may be from multiple charsets) when the text is read
|
|
|
515 from a file or process, and is used to encode the text back into the
|
|
|
516 same format when it is written out to a file or process.
|
|
|
517
|
|
|
518 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
519 Text, which is used for inter-client data under the X Window System)
|
|
|
520 use escape sequences to switch between different charsets -- Japanese
|
|
|
521 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
522 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
|
523 `make-coding-system' for more information.
|
|
|
524
|
|
|
525 Coding systems are normally identified using a symbol, and the
|
|
|
526 symbol is accepted in place of the actual coding system object whenever
|
|
|
527 a coding system is called for. (This is similar to how faces work.)
|
|
|
528 */
|
|
|
529 (object))
|
|
|
530 {
|
|
|
531 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
532 }
|
|
|
533
|
|
|
534 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
535 Retrieve the coding system of the given name.
|
|
|
536
|
|
|
537 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
538 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
539 If there is no such coding system, nil is returned. Otherwise the
|
|
|
540 associated coding system object is returned.
|
|
|
541 */
|
|
|
542 (coding_system_or_name))
|
|
|
543 {
|
|
|
544 if (NILP (coding_system_or_name))
|
|
|
545 coding_system_or_name = Qbinary;
|
|
398
|
546 else if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
547 return coding_system_or_name;
|
|
272
|
548 else
|
|
|
549 CHECK_SYMBOL (coding_system_or_name);
|
|
259
|
550
|
|
398
|
551 while (1)
|
|
|
552 {
|
|
|
553 coding_system_or_name =
|
|
|
554 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
|
|
555
|
|
|
556 if (CODING_SYSTEMP (coding_system_or_name) || NILP (coding_system_or_name))
|
|
|
557 return coding_system_or_name;
|
|
|
558 }
|
|
259
|
559 }
|
|
|
560
|
|
|
561 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
562 Retrieve the coding system of the given name.
|
|
|
563 Same as `find-coding-system' except that if there is no such
|
|
|
564 coding system, an error is signaled instead of returning nil.
|
|
|
565 */
|
|
|
566 (name))
|
|
|
567 {
|
|
|
568 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
569
|
|
|
570 if (NILP (coding_system))
|
|
|
571 signal_simple_error ("No such coding system", name);
|
|
|
572 return coding_system;
|
|
|
573 }
|
|
|
574
|
|
|
575 /* We store the coding systems in hash tables with the names as the key and the
|
|
|
576 actual coding system object as the value. Occasionally we need to use them
|
|
|
577 in a list format. These routines provide us with that. */
|
|
|
578 struct coding_system_list_closure
|
|
|
579 {
|
|
|
580 Lisp_Object *coding_system_list;
|
|
|
581 };
|
|
|
582
|
|
|
583 static int
|
|
380
|
584 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
|
|
259
|
585 void *coding_system_list_closure)
|
|
|
586 {
|
|
|
587 /* This function can GC */
|
|
|
588 struct coding_system_list_closure *cscl =
|
|
|
589 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
380
|
590 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
|
591
|
|
398
|
592 *coding_system_list = Fcons (key, *coding_system_list);
|
|
259
|
593 return 0;
|
|
|
594 }
|
|
|
595
|
|
|
596 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
|
597 Return a list of the names of all defined coding systems.
|
|
|
598 */
|
|
|
599 ())
|
|
|
600 {
|
|
|
601 Lisp_Object coding_system_list = Qnil;
|
|
|
602 struct gcpro gcpro1;
|
|
|
603 struct coding_system_list_closure coding_system_list_closure;
|
|
|
604
|
|
|
605 GCPRO1 (coding_system_list);
|
|
|
606 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
380
|
607 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
|
259
|
608 &coding_system_list_closure);
|
|
|
609 UNGCPRO;
|
|
|
610
|
|
|
611 return coding_system_list;
|
|
|
612 }
|
|
|
613
|
|
|
614 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
615 Return the name of the given coding system.
|
|
|
616 */
|
|
|
617 (coding_system))
|
|
|
618 {
|
|
|
619 coding_system = Fget_coding_system (coding_system);
|
|
|
620 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
621 }
|
|
|
622
|
|
396
|
623 static Lisp_Coding_System *
|
|
259
|
624 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
|
|
|
625 {
|
|
396
|
626 Lisp_Coding_System *codesys =
|
|
398
|
627 alloc_lcrecord_type (Lisp_Coding_System, &lrecord_coding_system);
|
|
259
|
628
|
|
|
629 zero_lcrecord (codesys);
|
|
|
630 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
631 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
|
632 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
|
633 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
634 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
635 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
|
636 CODING_SYSTEM_TYPE (codesys) = type;
|
|
261
|
637 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
|
|
259
|
638 #ifdef MULE
|
|
|
639 if (type == CODESYS_ISO2022)
|
|
|
640 {
|
|
|
641 int i;
|
|
|
642 for (i = 0; i < 4; i++)
|
|
|
643 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
|
644 }
|
|
|
645 else if (type == CODESYS_CCL)
|
|
|
646 {
|
|
|
647 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
|
648 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
|
649 }
|
|
272
|
650 #endif /* MULE */
|
|
259
|
651 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
652
|
|
|
653 return codesys;
|
|
|
654 }
|
|
|
655
|
|
|
656 #ifdef MULE
|
|
|
657 /* Given a list of charset conversion specs as specified in a Lisp
|
|
|
658 program, parse it into STORE_HERE. */
|
|
|
659
|
|
|
660 static void
|
|
|
661 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
|
662 Lisp_Object spec_list)
|
|
|
663 {
|
|
|
664 Lisp_Object rest;
|
|
|
665
|
|
|
666 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
|
667 {
|
|
|
668 Lisp_Object car = XCAR (rest);
|
|
|
669 Lisp_Object from, to;
|
|
|
670 struct charset_conversion_spec spec;
|
|
|
671
|
|
|
672 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
|
673 signal_simple_error ("Invalid charset conversion spec", car);
|
|
|
674 from = Fget_charset (XCAR (car));
|
|
|
675 to = Fget_charset (XCAR (XCDR (car)));
|
|
|
676 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
|
677 signal_simple_error_2
|
|
|
678 ("Attempted conversion between different charset types",
|
|
|
679 from, to);
|
|
|
680 spec.from_charset = from;
|
|
|
681 spec.to_charset = to;
|
|
|
682
|
|
|
683 Dynarr_add (store_here, spec);
|
|
|
684 }
|
|
|
685 }
|
|
|
686
|
|
|
687 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
|
688 specs, return the equivalent as the Lisp programmer would see it.
|
|
|
689
|
|
|
690 If LOAD_HERE is 0, return Qnil. */
|
|
|
691
|
|
|
692 static Lisp_Object
|
|
|
693 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
|
694 {
|
|
|
695 int i;
|
|
272
|
696 Lisp_Object result;
|
|
259
|
697
|
|
|
698 if (!load_here)
|
|
|
699 return Qnil;
|
|
272
|
700 for (i = 0, result = Qnil; i < Dynarr_length (load_here); i++)
|
|
259
|
701 {
|
|
272
|
702 struct charset_conversion_spec *ccs = Dynarr_atp (load_here, i);
|
|
259
|
703 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
|
704 }
|
|
|
705
|
|
|
706 return Fnreverse (result);
|
|
|
707 }
|
|
|
708
|
|
272
|
709 #endif /* MULE */
|
|
259
|
710
|
|
|
711 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
712 Register symbol NAME as a coding system.
|
|
|
713
|
|
|
714 TYPE describes the conversion method used and should be one of
|
|
|
715
|
|
|
716 nil or 'undecided
|
|
|
717 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
718 used in the file.
|
|
|
719 'no-conversion
|
|
|
720 No conversion. Use this for binary files and such. On output,
|
|
|
721 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
722 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
723 characters will only be present if you explicitly insert them.)
|
|
|
724 'shift-jis
|
|
|
725 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
396
|
726 'ucs-4
|
|
|
727 ISO 10646 UCS-4 encoding.
|
|
|
728 'utf-8
|
|
|
729 ISO 10646 UTF-8 encoding.
|
|
259
|
730 'iso2022
|
|
|
731 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
732 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
733 standard Unix encoding for Japanese and other languages), and
|
|
|
734 Compound Text (the encoding used in X11). You can specify more
|
|
371
|
735 specific information about the conversion with the FLAGS argument.
|
|
259
|
736 'big5
|
|
|
737 Big5 (the encoding commonly used for Taiwanese).
|
|
|
738 'ccl
|
|
|
739 The conversion is performed using a user-written pseudo-code
|
|
|
740 program. CCL (Code Conversion Language) is the name of this
|
|
|
741 pseudo-code.
|
|
|
742 'internal
|
|
|
743 Write out or read in the raw contents of the memory representing
|
|
|
744 the buffer's text. This is primarily useful for debugging
|
|
|
745 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
746 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
747 WARNING: Reading in a file using 'internal conversion can result
|
|
|
748 in an internal inconsistency in the memory representing a
|
|
|
749 buffer's text, which will produce unpredictable results and may
|
|
|
750 cause XEmacs to crash. Under normal circumstances you should
|
|
|
751 never use 'internal conversion.
|
|
|
752
|
|
|
753 DOC-STRING is a string describing the coding system.
|
|
|
754
|
|
|
755 PROPS is a property list, describing the specific nature of the
|
|
|
756 character set. Recognized properties are:
|
|
|
757
|
|
|
758 'mnemonic
|
|
|
759 String to be displayed in the modeline when this coding system is
|
|
|
760 active.
|
|
|
761
|
|
|
762 'eol-type
|
|
|
763 End-of-line conversion to be used. It should be one of
|
|
|
764
|
|
|
765 nil
|
|
|
766 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
767 or CR). Also generate subsidiary coding systems named
|
|
|
768 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
769 identical to this coding system but have an EOL-TYPE
|
|
|
770 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
771 'lf
|
|
|
772 The end of a line is marked externally using ASCII LF.
|
|
|
773 Since this is also the way that XEmacs represents an
|
|
|
774 end-of-line internally, specifying this option results
|
|
|
775 in no end-of-line conversion. This is the standard
|
|
|
776 format for Unix text files.
|
|
|
777 'crlf
|
|
|
778 The end of a line is marked externally using ASCII
|
|
|
779 CRLF. This is the standard format for MS-DOS text
|
|
|
780 files.
|
|
|
781 'cr
|
|
|
782 The end of a line is marked externally using ASCII CR.
|
|
|
783 This is the standard format for Macintosh text files.
|
|
|
784 t
|
|
|
785 Automatically detect the end-of-line type but do not
|
|
|
786 generate subsidiary coding systems. (This value is
|
|
|
787 converted to nil when stored internally, and
|
|
|
788 `coding-system-property' will return nil.)
|
|
|
789
|
|
|
790 'post-read-conversion
|
|
|
791 Function called after a file has been read in, to perform the
|
|
|
792 decoding. Called with two arguments, BEG and END, denoting
|
|
|
793 a region of the current buffer to be decoded.
|
|
|
794
|
|
|
795 'pre-write-conversion
|
|
|
796 Function called before a file is written out, to perform the
|
|
|
797 encoding. Called with two arguments, BEG and END, denoting
|
|
|
798 a region of the current buffer to be encoded.
|
|
|
799
|
|
|
800
|
|
|
801 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
802
|
|
|
803 'charset-g0
|
|
|
804 'charset-g1
|
|
|
805 'charset-g2
|
|
|
806 'charset-g3
|
|
|
807 The character set initially designated to the G0 - G3 registers.
|
|
|
808 The value should be one of
|
|
|
809
|
|
|
810 -- A charset object (designate that character set)
|
|
|
811 -- nil (do not ever use this register)
|
|
|
812 -- t (no character set is initially designated to
|
|
|
813 the register, but may be later on; this automatically
|
|
|
814 sets the corresponding `force-g*-on-output' property)
|
|
|
815
|
|
|
816 'force-g0-on-output
|
|
|
817 'force-g1-on-output
|
|
|
818 'force-g2-on-output
|
|
|
819 'force-g2-on-output
|
|
|
820 If non-nil, send an explicit designation sequence on output before
|
|
|
821 using the specified register.
|
|
|
822
|
|
|
823 'short
|
|
|
824 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
825 "ESC $ B" on output in place of the full designation sequences
|
|
|
826 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
|
827
|
|
|
828 'no-ascii-eol
|
|
|
829 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
830 Setting this to non-nil also suppresses other state-resetting that
|
|
|
831 normally happens at the end of a line.
|
|
|
832
|
|
|
833 'no-ascii-cntl
|
|
|
834 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
835
|
|
|
836 'seven
|
|
|
837 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
838 environment.
|
|
|
839
|
|
|
840 'lock-shift
|
|
|
841 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
842 or designation by escape sequence.
|
|
|
843
|
|
|
844 'no-iso6429
|
|
|
845 If non-nil, don't use ISO6429's direction specification.
|
|
|
846
|
|
|
847 'escape-quoted
|
|
|
848 If non-nil, literal control characters that are the same as
|
|
|
849 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
850 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
851 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
|
852 so that they can be properly distinguished from an escape sequence.
|
|
|
853 (Note that doing this results in a non-portable encoding.) This
|
|
|
854 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
855 is a good choice for a quoting character because there are no
|
|
|
856 escape sequences whose second byte is a character from the Control-0
|
|
|
857 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
858 ISO2022 standard.
|
|
|
859
|
|
|
860 'input-charset-conversion
|
|
|
861 A list of conversion specifications, specifying conversion of
|
|
|
862 characters in one charset to another when decoding is performed.
|
|
|
863 Each specification is a list of two elements: the source charset,
|
|
|
864 and the destination charset.
|
|
|
865
|
|
|
866 'output-charset-conversion
|
|
|
867 A list of conversion specifications, specifying conversion of
|
|
|
868 characters in one charset to another when encoding is performed.
|
|
|
869 The form of each specification is the same as for
|
|
|
870 'input-charset-conversion.
|
|
|
871
|
|
|
872
|
|
|
873 The following additional properties are recognized (and required)
|
|
|
874 if TYPE is 'ccl:
|
|
|
875
|
|
|
876 'decode
|
|
|
877 CCL program used for decoding (converting to internal format).
|
|
|
878
|
|
|
879 'encode
|
|
|
880 CCL program used for encoding (converting to external format).
|
|
|
881 */
|
|
|
882 (name, type, doc_string, props))
|
|
|
883 {
|
|
396
|
884 Lisp_Coding_System *codesys;
|
|
259
|
885 Lisp_Object rest, key, value;
|
|
|
886 enum coding_system_type ty;
|
|
|
887 int need_to_setup_eol_systems = 1;
|
|
|
888
|
|
|
889 /* Convert type to constant */
|
|
|
890 if (NILP (type) || EQ (type, Qundecided))
|
|
|
891 { ty = CODESYS_AUTODETECT; }
|
|
|
892 #ifdef MULE
|
|
|
893 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
|
894 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
|
895 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
|
396
|
896 else if (EQ (type, Qucs4)) { ty = CODESYS_UCS4; }
|
|
|
897 else if (EQ (type, Qutf8)) { ty = CODESYS_UTF8; }
|
|
259
|
898 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
|
899 #endif
|
|
|
900 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
|
901 #ifdef DEBUG_XEMACS
|
|
|
902 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
|
903 #endif
|
|
|
904 else
|
|
|
905 signal_simple_error ("Invalid coding system type", type);
|
|
|
906
|
|
|
907 CHECK_SYMBOL (name);
|
|
|
908
|
|
|
909 codesys = allocate_coding_system (ty, name);
|
|
|
910
|
|
|
911 if (NILP (doc_string))
|
|
|
912 doc_string = build_string ("");
|
|
|
913 else
|
|
|
914 CHECK_STRING (doc_string);
|
|
|
915 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
|
916
|
|
|
917 EXTERNAL_PROPERTY_LIST_LOOP (rest, key, value, props)
|
|
|
918 {
|
|
|
919 if (EQ (key, Qmnemonic))
|
|
|
920 {
|
|
|
921 if (!NILP (value))
|
|
|
922 CHECK_STRING (value);
|
|
|
923 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
|
924 }
|
|
|
925
|
|
|
926 else if (EQ (key, Qeol_type))
|
|
|
927 {
|
|
|
928 need_to_setup_eol_systems = NILP (value);
|
|
|
929 if (EQ (value, Qt))
|
|
|
930 value = Qnil;
|
|
|
931 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
|
932 }
|
|
|
933
|
|
|
934 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
|
935 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
|
936 #ifdef MULE
|
|
|
937 else if (ty == CODESYS_ISO2022)
|
|
|
938 {
|
|
|
939 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
|
940 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
|
941 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
|
942
|
|
|
943 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
|
944 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
|
945 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
|
946 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
|
947
|
|
|
948 #define FROB_FORCE_CHARSET(charset_num) \
|
|
|
949 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
|
950
|
|
|
951 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
|
952 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
|
953 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
|
954 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
|
955
|
|
|
956 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
|
957 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
|
958
|
|
|
959 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
|
960 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
|
961 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
|
962 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
|
963 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
|
964 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
|
965 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
|
966
|
|
|
967 else if (EQ (key, Qinput_charset_conversion))
|
|
|
968 {
|
|
|
969 codesys->iso2022.input_conv =
|
|
|
970 Dynarr_new (charset_conversion_spec);
|
|
|
971 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
|
972 value);
|
|
|
973 }
|
|
|
974 else if (EQ (key, Qoutput_charset_conversion))
|
|
|
975 {
|
|
|
976 codesys->iso2022.output_conv =
|
|
|
977 Dynarr_new (charset_conversion_spec);
|
|
|
978 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
|
979 value);
|
|
|
980 }
|
|
|
981 else
|
|
|
982 signal_simple_error ("Unrecognized property", key);
|
|
|
983 }
|
|
|
984 else if (EQ (type, Qccl))
|
|
|
985 {
|
|
|
986 if (EQ (key, Qdecode))
|
|
|
987 {
|
|
|
988 CHECK_VECTOR (value);
|
|
|
989 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
|
990 }
|
|
|
991 else if (EQ (key, Qencode))
|
|
|
992 {
|
|
|
993 CHECK_VECTOR (value);
|
|
|
994 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
|
995 }
|
|
|
996 else
|
|
|
997 signal_simple_error ("Unrecognized property", key);
|
|
|
998 }
|
|
|
999 #endif /* MULE */
|
|
|
1000 else
|
|
|
1001 signal_simple_error ("Unrecognized property", key);
|
|
|
1002 }
|
|
|
1003
|
|
|
1004 if (need_to_setup_eol_systems)
|
|
|
1005 setup_eol_coding_systems (codesys);
|
|
|
1006
|
|
|
1007 {
|
|
|
1008 Lisp_Object codesys_obj;
|
|
|
1009 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
380
|
1010 Fputhash (name, codesys_obj, Vcoding_system_hash_table);
|
|
259
|
1011 return codesys_obj;
|
|
|
1012 }
|
|
|
1013 }
|
|
|
1014
|
|
|
1015 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
1016 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
1017 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
1018 be created.
|
|
|
1019 */
|
|
|
1020 (old_coding_system, new_name))
|
|
|
1021 {
|
|
|
1022 Lisp_Object new_coding_system;
|
|
|
1023 old_coding_system = Fget_coding_system (old_coding_system);
|
|
|
1024 new_coding_system = Ffind_coding_system (new_name);
|
|
|
1025 if (NILP (new_coding_system))
|
|
|
1026 {
|
|
|
1027 XSETCODING_SYSTEM (new_coding_system,
|
|
|
1028 allocate_coding_system
|
|
|
1029 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
|
1030 new_name));
|
|
380
|
1031 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
|
259
|
1032 }
|
|
|
1033
|
|
|
1034 {
|
|
396
|
1035 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
1036 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
259
|
1037 memcpy (((char *) to ) + sizeof (to->header),
|
|
|
1038 ((char *) from) + sizeof (from->header),
|
|
|
1039 sizeof (*from) - sizeof (from->header));
|
|
|
1040 to->name = new_name;
|
|
|
1041 }
|
|
|
1042 return new_coding_system;
|
|
|
1043 }
|
|
|
1044
|
|
398
|
1045 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p, 1, 1, 0, /*
|
|
|
1046 Return t if OBJECT names a coding system, and is not a coding system alias.
|
|
|
1047 */
|
|
|
1048 (object))
|
|
|
1049 {
|
|
|
1050 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil))
|
|
|
1051 ? Qt : Qnil;
|
|
|
1052 }
|
|
|
1053
|
|
|
1054 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /*
|
|
|
1055 Return t if OBJECT is a coding system alias.
|
|
|
1056 All coding system aliases are created by `define-coding-system-alias'.
|
|
|
1057 */
|
|
|
1058 (object))
|
|
|
1059 {
|
|
|
1060 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero))
|
|
|
1061 ? Qt : Qnil;
|
|
|
1062 }
|
|
|
1063
|
|
|
1064 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /*
|
|
|
1065 Return the coding-system symbol for which symbol ALIAS is an alias.
|
|
|
1066 */
|
|
|
1067 (alias))
|
|
|
1068 {
|
|
|
1069 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil);
|
|
|
1070 if (SYMBOLP (aliasee))
|
|
|
1071 return aliasee;
|
|
|
1072 else
|
|
|
1073 signal_simple_error ("Symbol is not a coding system alias", alias);
|
|
|
1074 }
|
|
|
1075
|
|
259
|
1076 static Lisp_Object
|
|
398
|
1077 append_suffix_to_symbol (Lisp_Object symbol, const char *ascii_string)
|
|
|
1078 {
|
|
|
1079 return Fintern (concat2 (Fsymbol_name (symbol), build_string (ascii_string)),
|
|
|
1080 Qnil);
|
|
|
1081 }
|
|
|
1082
|
|
|
1083 /* A maphash function, for removing dangling coding system aliases. */
|
|
|
1084 static int
|
|
|
1085 dangling_coding_system_alias_p (Lisp_Object alias,
|
|
|
1086 Lisp_Object aliasee,
|
|
|
1087 void *dangling_aliases)
|
|
|
1088 {
|
|
|
1089 if (SYMBOLP (aliasee)
|
|
|
1090 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil)))
|
|
|
1091 {
|
|
|
1092 (*(int *) dangling_aliases)++;
|
|
|
1093 return 1;
|
|
|
1094 }
|
|
|
1095 else
|
|
|
1096 return 0;
|
|
|
1097 }
|
|
|
1098
|
|
|
1099 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
|
1100 Define symbol ALIAS as an alias for coding system ALIASEE.
|
|
|
1101
|
|
|
1102 You can use this function to redefine an alias that has already been defined,
|
|
|
1103 but you cannot redefine a name which is the canonical name for a coding system.
|
|
|
1104 \(a canonical name of a coding system is what is returned when you call
|
|
|
1105 `coding-system-name' on a coding system).
|
|
|
1106
|
|
|
1107 ALIASEE itself can be an alias, which allows you to define nested aliases.
|
|
|
1108
|
|
|
1109 You are forbidden, however, from creating alias loops or `dangling' aliases.
|
|
|
1110 These will be detected, and an error will be signaled if you attempt to do so.
|
|
|
1111
|
|
|
1112 If ALIASEE is nil, then ALIAS will simply be undefined.
|
|
|
1113
|
|
|
1114 See also `coding-system-alias-p', `coding-system-aliasee',
|
|
|
1115 and `coding-system-canonical-name-p'.
|
|
|
1116 */
|
|
|
1117 (alias, aliasee))
|
|
|
1118 {
|
|
|
1119 Lisp_Object real_coding_system, probe;
|
|
|
1120
|
|
|
1121 CHECK_SYMBOL (alias);
|
|
|
1122
|
|
|
1123 if (!NILP (Fcoding_system_canonical_name_p (alias)))
|
|
|
1124 signal_simple_error
|
|
|
1125 ("Symbol is the canonical name of a coding system and cannot be redefined",
|
|
|
1126 alias);
|
|
|
1127
|
|
|
1128 if (NILP (aliasee))
|
|
|
1129 {
|
|
|
1130 Lisp_Object subsidiary_unix = append_suffix_to_symbol (alias, "-unix");
|
|
|
1131 Lisp_Object subsidiary_dos = append_suffix_to_symbol (alias, "-dos");
|
|
|
1132 Lisp_Object subsidiary_mac = append_suffix_to_symbol (alias, "-mac");
|
|
|
1133
|
|
|
1134 Fremhash (alias, Vcoding_system_hash_table);
|
|
|
1135
|
|
|
1136 /* Undefine subsidiary aliases,
|
|
|
1137 presumably created by a previous call to this function */
|
|
|
1138 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) &&
|
|
|
1139 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) &&
|
|
|
1140 ! NILP (Fcoding_system_alias_p (subsidiary_mac)))
|
|
|
1141 {
|
|
|
1142 Fdefine_coding_system_alias (subsidiary_unix, Qnil);
|
|
|
1143 Fdefine_coding_system_alias (subsidiary_dos, Qnil);
|
|
|
1144 Fdefine_coding_system_alias (subsidiary_mac, Qnil);
|
|
|
1145 }
|
|
|
1146
|
|
|
1147 /* Undefine dangling coding system aliases. */
|
|
|
1148 {
|
|
|
1149 int dangling_aliases;
|
|
|
1150
|
|
|
1151 do {
|
|
|
1152 dangling_aliases = 0;
|
|
|
1153 elisp_map_remhash (dangling_coding_system_alias_p,
|
|
|
1154 Vcoding_system_hash_table,
|
|
|
1155 &dangling_aliases);
|
|
|
1156 } while (dangling_aliases > 0);
|
|
|
1157 }
|
|
|
1158
|
|
|
1159 return Qnil;
|
|
|
1160 }
|
|
|
1161
|
|
|
1162 if (CODING_SYSTEMP (aliasee))
|
|
|
1163 aliasee = XCODING_SYSTEM_NAME (aliasee);
|
|
|
1164
|
|
|
1165 /* Checks that aliasee names a coding-system */
|
|
|
1166 real_coding_system = Fget_coding_system (aliasee);
|
|
|
1167
|
|
|
1168 /* Check for coding system alias loops */
|
|
|
1169 if (EQ (alias, aliasee))
|
|
|
1170 alias_loop: signal_simple_error_2
|
|
|
1171 ("Attempt to create a coding system alias loop", alias, aliasee);
|
|
|
1172
|
|
|
1173 for (probe = aliasee;
|
|
|
1174 SYMBOLP (probe);
|
|
|
1175 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero))
|
|
|
1176 {
|
|
|
1177 if (EQ (probe, alias))
|
|
|
1178 goto alias_loop;
|
|
|
1179 }
|
|
|
1180
|
|
|
1181 Fputhash (alias, aliasee, Vcoding_system_hash_table);
|
|
|
1182
|
|
|
1183 /* Set up aliases for subsidiaries.
|
|
|
1184 #### There must be a better way to handle subsidiary coding systems. */
|
|
|
1185 {
|
|
|
1186 static const char *suffixes[] = { "-unix", "-dos", "-mac" };
|
|
|
1187 int i;
|
|
|
1188 for (i = 0; i < countof (suffixes); i++)
|
|
|
1189 {
|
|
|
1190 Lisp_Object alias_subsidiary =
|
|
|
1191 append_suffix_to_symbol (alias, suffixes[i]);
|
|
|
1192 Lisp_Object aliasee_subsidiary =
|
|
|
1193 append_suffix_to_symbol (aliasee, suffixes[i]);
|
|
|
1194
|
|
|
1195 if (! NILP (Ffind_coding_system (aliasee_subsidiary)))
|
|
|
1196 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary);
|
|
|
1197 }
|
|
|
1198 }
|
|
|
1199 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
|
|
|
1200 but it doesn't look intentional, so I'd rather return something
|
|
|
1201 meaningful or nothing at all. */
|
|
|
1202 return Qnil;
|
|
|
1203 }
|
|
|
1204
|
|
|
1205 static Lisp_Object
|
|
|
1206 subsidiary_coding_system (Lisp_Object coding_system, eol_type_t type)
|
|
259
|
1207 {
|
|
396
|
1208 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
259
|
1209 Lisp_Object new_coding_system;
|
|
|
1210
|
|
|
1211 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
1212 return coding_system;
|
|
|
1213
|
|
|
1214 switch (type)
|
|
|
1215 {
|
|
|
1216 case EOL_AUTODETECT: return coding_system;
|
|
|
1217 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
1218 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
1219 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
|
1220 default: abort ();
|
|
|
1221 }
|
|
|
1222
|
|
|
1223 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
1224 }
|
|
|
1225
|
|
|
1226 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
1227 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
|
1228 */
|
|
|
1229 (coding_system, eol_type))
|
|
|
1230 {
|
|
|
1231 coding_system = Fget_coding_system (coding_system);
|
|
|
1232
|
|
|
1233 return subsidiary_coding_system (coding_system,
|
|
|
1234 symbol_to_eol_type (eol_type));
|
|
|
1235 }
|
|
|
1236
|
|
|
1237
|
|
|
1238 /************************************************************************/
|
|
|
1239 /* Coding system accessors */
|
|
|
1240 /************************************************************************/
|
|
|
1241
|
|
|
1242 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
|
1243 Return the doc string for CODING-SYSTEM.
|
|
|
1244 */
|
|
|
1245 (coding_system))
|
|
|
1246 {
|
|
|
1247 coding_system = Fget_coding_system (coding_system);
|
|
|
1248 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1249 }
|
|
|
1250
|
|
|
1251 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
1252 Return the type of CODING-SYSTEM.
|
|
|
1253 */
|
|
|
1254 (coding_system))
|
|
|
1255 {
|
|
|
1256 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
|
1257 {
|
|
380
|
1258 default: abort ();
|
|
259
|
1259 case CODESYS_AUTODETECT: return Qundecided;
|
|
|
1260 #ifdef MULE
|
|
|
1261 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
|
1262 case CODESYS_ISO2022: return Qiso2022;
|
|
|
1263 case CODESYS_BIG5: return Qbig5;
|
|
396
|
1264 case CODESYS_UCS4: return Qucs4;
|
|
|
1265 case CODESYS_UTF8: return Qutf8;
|
|
259
|
1266 case CODESYS_CCL: return Qccl;
|
|
|
1267 #endif
|
|
|
1268 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
|
1269 #ifdef DEBUG_XEMACS
|
|
|
1270 case CODESYS_INTERNAL: return Qinternal;
|
|
|
1271 #endif
|
|
|
1272 }
|
|
|
1273 }
|
|
|
1274
|
|
|
1275 #ifdef MULE
|
|
|
1276 static
|
|
|
1277 Lisp_Object coding_system_charset (Lisp_Object coding_system, int gnum)
|
|
|
1278 {
|
|
|
1279 Lisp_Object cs
|
|
|
1280 = XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, gnum);
|
|
272
|
1281
|
|
|
1282 return CHARSETP (cs) ? XCHARSET_NAME (cs) : Qnil;
|
|
259
|
1283 }
|
|
|
1284
|
|
|
1285 DEFUN ("coding-system-charset", Fcoding_system_charset, 2, 2, 0, /*
|
|
|
1286 Return initial charset of CODING-SYSTEM designated to GNUM.
|
|
|
1287 GNUM allows 0 .. 3.
|
|
|
1288 */
|
|
|
1289 (coding_system, gnum))
|
|
|
1290 {
|
|
|
1291 coding_system = Fget_coding_system (coding_system);
|
|
|
1292 CHECK_INT (gnum);
|
|
|
1293
|
|
272
|
1294 return coding_system_charset (coding_system, XINT (gnum));
|
|
259
|
1295 }
|
|
272
|
1296 #endif /* MULE */
|
|
259
|
1297
|
|
|
1298 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
1299 Return the PROP property of CODING-SYSTEM.
|
|
|
1300 */
|
|
|
1301 (coding_system, prop))
|
|
|
1302 {
|
|
|
1303 int i, ok = 0;
|
|
|
1304 enum coding_system_type type;
|
|
|
1305
|
|
|
1306 coding_system = Fget_coding_system (coding_system);
|
|
|
1307 CHECK_SYMBOL (prop);
|
|
|
1308 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
|
1309
|
|
|
1310 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
|
1311 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
|
1312 {
|
|
|
1313 ok = 1;
|
|
|
1314 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
|
1315 {
|
|
|
1316 case CODESYS_PROP_ALL_OK:
|
|
|
1317 break;
|
|
|
1318 #ifdef MULE
|
|
|
1319 case CODESYS_PROP_ISO2022:
|
|
|
1320 if (type != CODESYS_ISO2022)
|
|
|
1321 signal_simple_error
|
|
|
1322 ("Property only valid in ISO2022 coding systems",
|
|
|
1323 prop);
|
|
|
1324 break;
|
|
|
1325
|
|
|
1326 case CODESYS_PROP_CCL:
|
|
|
1327 if (type != CODESYS_CCL)
|
|
|
1328 signal_simple_error
|
|
|
1329 ("Property only valid in CCL coding systems",
|
|
|
1330 prop);
|
|
|
1331 break;
|
|
|
1332 #endif /* MULE */
|
|
|
1333 default:
|
|
|
1334 abort ();
|
|
|
1335 }
|
|
|
1336 }
|
|
|
1337
|
|
|
1338 if (!ok)
|
|
|
1339 signal_simple_error ("Unrecognized property", prop);
|
|
|
1340
|
|
|
1341 if (EQ (prop, Qname))
|
|
|
1342 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1343 else if (EQ (prop, Qtype))
|
|
|
1344 return Fcoding_system_type (coding_system);
|
|
|
1345 else if (EQ (prop, Qdoc_string))
|
|
|
1346 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1347 else if (EQ (prop, Qmnemonic))
|
|
|
1348 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
|
1349 else if (EQ (prop, Qeol_type))
|
|
|
1350 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
|
1351 else if (EQ (prop, Qeol_lf))
|
|
|
1352 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1353 else if (EQ (prop, Qeol_crlf))
|
|
|
1354 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1355 else if (EQ (prop, Qeol_cr))
|
|
|
1356 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1357 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1358 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1359 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1360 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
|
1361 #ifdef MULE
|
|
|
1362 else if (type == CODESYS_ISO2022)
|
|
|
1363 {
|
|
|
1364 if (EQ (prop, Qcharset_g0))
|
|
|
1365 return coding_system_charset (coding_system, 0);
|
|
|
1366 else if (EQ (prop, Qcharset_g1))
|
|
|
1367 return coding_system_charset (coding_system, 1);
|
|
|
1368 else if (EQ (prop, Qcharset_g2))
|
|
|
1369 return coding_system_charset (coding_system, 2);
|
|
|
1370 else if (EQ (prop, Qcharset_g3))
|
|
|
1371 return coding_system_charset (coding_system, 3);
|
|
|
1372
|
|
|
1373 #define FORCE_CHARSET(charset_num) \
|
|
|
1374 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
|
1375 (coding_system, charset_num) ? Qt : Qnil)
|
|
|
1376
|
|
|
1377 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
|
1378 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
|
1379 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
|
1380 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
|
1381
|
|
|
1382 #define LISP_BOOLEAN(prop) \
|
|
|
1383 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
|
1384
|
|
|
1385 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
|
1386 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
|
1387 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
|
1388 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
|
1389 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
|
1390 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
|
1391 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
|
1392
|
|
|
1393 else if (EQ (prop, Qinput_charset_conversion))
|
|
|
1394 return
|
|
|
1395 unparse_charset_conversion_specs
|
|
|
1396 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
|
1397 else if (EQ (prop, Qoutput_charset_conversion))
|
|
|
1398 return
|
|
|
1399 unparse_charset_conversion_specs
|
|
|
1400 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
|
1401 else
|
|
|
1402 abort ();
|
|
|
1403 }
|
|
|
1404 else if (type == CODESYS_CCL)
|
|
|
1405 {
|
|
|
1406 if (EQ (prop, Qdecode))
|
|
|
1407 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
|
1408 else if (EQ (prop, Qencode))
|
|
|
1409 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
|
1410 else
|
|
|
1411 abort ();
|
|
|
1412 }
|
|
|
1413 #endif /* MULE */
|
|
|
1414 else
|
|
|
1415 abort ();
|
|
|
1416
|
|
|
1417 return Qnil; /* not reached */
|
|
|
1418 }
|
|
|
1419
|
|
|
1420
|
|
|
1421 /************************************************************************/
|
|
|
1422 /* Coding category functions */
|
|
|
1423 /************************************************************************/
|
|
|
1424
|
|
|
1425 static int
|
|
|
1426 decode_coding_category (Lisp_Object symbol)
|
|
|
1427 {
|
|
|
1428 int i;
|
|
|
1429
|
|
|
1430 CHECK_SYMBOL (symbol);
|
|
|
1431 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1432 if (EQ (coding_category_symbol[i], symbol))
|
|
|
1433 return i;
|
|
|
1434
|
|
|
1435 signal_simple_error ("Unrecognized coding category", symbol);
|
|
|
1436 return 0; /* not reached */
|
|
|
1437 }
|
|
|
1438
|
|
|
1439 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
1440 Return a list of all recognized coding categories.
|
|
|
1441 */
|
|
|
1442 ())
|
|
|
1443 {
|
|
|
1444 int i;
|
|
|
1445 Lisp_Object list = Qnil;
|
|
|
1446
|
|
|
1447 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1448 list = Fcons (coding_category_symbol[i], list);
|
|
|
1449 return list;
|
|
|
1450 }
|
|
|
1451
|
|
|
1452 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
1453 Change the priority order of the coding categories.
|
|
|
1454 LIST should be list of coding categories, in descending order of
|
|
|
1455 priority. Unspecified coding categories will be lower in priority
|
|
|
1456 than all specified ones, in the same relative order they were in
|
|
|
1457 previously.
|
|
|
1458 */
|
|
|
1459 (list))
|
|
|
1460 {
|
|
|
1461 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
|
1462 int i, j;
|
|
|
1463 Lisp_Object rest;
|
|
|
1464
|
|
|
1465 /* First generate a list that maps coding categories to priorities. */
|
|
|
1466
|
|
|
1467 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1468 category_to_priority[i] = -1;
|
|
|
1469
|
|
|
1470 /* Highest priority comes from the specified list. */
|
|
|
1471 i = 0;
|
|
|
1472 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
1473 {
|
|
|
1474 int cat = decode_coding_category (XCAR (rest));
|
|
|
1475
|
|
|
1476 if (category_to_priority[cat] >= 0)
|
|
|
1477 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
|
1478 category_to_priority[cat] = i++;
|
|
|
1479 }
|
|
|
1480
|
|
|
1481 /* Now go through the existing categories by priority to retrieve
|
|
|
1482 the categories not yet specified and preserve their priority
|
|
|
1483 order. */
|
|
|
1484 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
|
1485 {
|
|
398
|
1486 int cat = fcd->coding_category_by_priority[j];
|
|
259
|
1487 if (category_to_priority[cat] < 0)
|
|
|
1488 category_to_priority[cat] = i++;
|
|
|
1489 }
|
|
|
1490
|
|
|
1491 /* Now we need to construct the inverse of the mapping we just
|
|
|
1492 constructed. */
|
|
|
1493
|
|
|
1494 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
398
|
1495 fcd->coding_category_by_priority[category_to_priority[i]] = i;
|
|
259
|
1496
|
|
|
1497 /* Phew! That was confusing. */
|
|
|
1498 return Qnil;
|
|
|
1499 }
|
|
|
1500
|
|
|
1501 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
1502 Return a list of coding categories in descending order of priority.
|
|
|
1503 */
|
|
|
1504 ())
|
|
|
1505 {
|
|
|
1506 int i;
|
|
|
1507 Lisp_Object list = Qnil;
|
|
|
1508
|
|
|
1509 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
398
|
1510 list = Fcons (coding_category_symbol[fcd->coding_category_by_priority[i]],
|
|
259
|
1511 list);
|
|
|
1512 return list;
|
|
|
1513 }
|
|
|
1514
|
|
|
1515 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
1516 Change the coding system associated with a coding category.
|
|
|
1517 */
|
|
|
1518 (coding_category, coding_system))
|
|
|
1519 {
|
|
|
1520 int cat = decode_coding_category (coding_category);
|
|
|
1521
|
|
|
1522 coding_system = Fget_coding_system (coding_system);
|
|
398
|
1523 fcd->coding_category_system[cat] = coding_system;
|
|
259
|
1524 return Qnil;
|
|
|
1525 }
|
|
|
1526
|
|
|
1527 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
1528 Return the coding system associated with a coding category.
|
|
|
1529 */
|
|
|
1530 (coding_category))
|
|
|
1531 {
|
|
|
1532 int cat = decode_coding_category (coding_category);
|
|
398
|
1533 Lisp_Object sys = fcd->coding_category_system[cat];
|
|
259
|
1534
|
|
|
1535 if (!NILP (sys))
|
|
|
1536 return XCODING_SYSTEM_NAME (sys);
|
|
|
1537 return Qnil;
|
|
|
1538 }
|
|
|
1539
|
|
|
1540
|
|
|
1541 /************************************************************************/
|
|
|
1542 /* Detecting the encoding of data */
|
|
|
1543 /************************************************************************/
|
|
|
1544
|
|
|
1545 struct detection_state
|
|
|
1546 {
|
|
398
|
1547 eol_type_t eol_type;
|
|
259
|
1548 int seen_non_ascii;
|
|
|
1549 int mask;
|
|
|
1550 #ifdef MULE
|
|
|
1551 struct
|
|
|
1552 {
|
|
|
1553 int mask;
|
|
|
1554 int in_second_byte;
|
|
|
1555 }
|
|
|
1556 big5;
|
|
|
1557
|
|
|
1558 struct
|
|
|
1559 {
|
|
|
1560 int mask;
|
|
|
1561 int in_second_byte;
|
|
|
1562 }
|
|
|
1563 shift_jis;
|
|
|
1564
|
|
|
1565 struct
|
|
|
1566 {
|
|
|
1567 int mask;
|
|
396
|
1568 int in_byte;
|
|
|
1569 }
|
|
|
1570 ucs4;
|
|
|
1571
|
|
|
1572 struct
|
|
|
1573 {
|
|
|
1574 int mask;
|
|
|
1575 int in_byte;
|
|
|
1576 }
|
|
|
1577 utf8;
|
|
|
1578
|
|
|
1579 struct
|
|
|
1580 {
|
|
|
1581 int mask;
|
|
259
|
1582 int initted;
|
|
|
1583 struct iso2022_decoder iso;
|
|
|
1584 unsigned int flags;
|
|
|
1585 int high_byte_count;
|
|
|
1586 unsigned int saw_single_shift:1;
|
|
|
1587 }
|
|
|
1588 iso2022;
|
|
|
1589 #endif
|
|
|
1590 struct
|
|
|
1591 {
|
|
|
1592 int seen_anything;
|
|
|
1593 int just_saw_cr;
|
|
|
1594 }
|
|
|
1595 eol;
|
|
|
1596 };
|
|
|
1597
|
|
|
1598 static int
|
|
|
1599 acceptable_control_char_p (int c)
|
|
|
1600 {
|
|
|
1601 switch (c)
|
|
|
1602 {
|
|
|
1603 /* Allow and ignore control characters that you might
|
|
|
1604 reasonably see in a text file */
|
|
|
1605 case '\r':
|
|
|
1606 case '\n':
|
|
|
1607 case '\t':
|
|
|
1608 case 7: /* bell */
|
|
|
1609 case 8: /* backspace */
|
|
|
1610 case 11: /* vertical tab */
|
|
|
1611 case 12: /* form feed */
|
|
|
1612 case 26: /* MS-DOS C-z junk */
|
|
|
1613 case 31: /* '^_' -- for info */
|
|
|
1614 return 1;
|
|
|
1615 default:
|
|
|
1616 return 0;
|
|
|
1617 }
|
|
|
1618 }
|
|
|
1619
|
|
|
1620 static int
|
|
|
1621 mask_has_at_most_one_bit_p (int mask)
|
|
|
1622 {
|
|
|
1623 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
|
1624 technical interviews */
|
|
|
1625 return (mask & (mask - 1)) == 0;
|
|
|
1626 }
|
|
|
1627
|
|
398
|
1628 static eol_type_t
|
|
|
1629 detect_eol_type (struct detection_state *st, const unsigned char *src,
|
|
259
|
1630 unsigned int n)
|
|
|
1631 {
|
|
|
1632 int c;
|
|
|
1633
|
|
|
1634 while (n--)
|
|
|
1635 {
|
|
|
1636 c = *src++;
|
|
398
|
1637 if (c == '\n')
|
|
|
1638 {
|
|
|
1639 if (st->eol.just_saw_cr)
|
|
|
1640 return EOL_CRLF;
|
|
|
1641 else if (st->eol.seen_anything)
|
|
|
1642 return EOL_LF;
|
|
|
1643 }
|
|
|
1644 else if (st->eol.just_saw_cr)
|
|
|
1645 return EOL_CR;
|
|
|
1646 else if (c == '\r')
|
|
259
|
1647 st->eol.just_saw_cr = 1;
|
|
|
1648 else
|
|
398
|
1649 st->eol.just_saw_cr = 0;
|
|
259
|
1650 st->eol.seen_anything = 1;
|
|
|
1651 }
|
|
|
1652
|
|
|
1653 return EOL_AUTODETECT;
|
|
|
1654 }
|
|
|
1655
|
|
|
1656 /* Attempt to determine the encoding and EOL type of the given text.
|
|
|
1657 Before calling this function for the first type, you must initialize
|
|
|
1658 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
|
1659
|
|
|
1660 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
|
1661 not yet known.
|
|
|
1662
|
|
|
1663 st->mask holds the determined coding category mask, or ~0 if only
|
|
|
1664 ASCII has been seen so far.
|
|
|
1665
|
|
|
1666 Returns:
|
|
|
1667
|
|
|
1668 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
|
1669 is present in st->mask
|
|
|
1670 1 == definitive answers are here for both st->eol_type and st->mask
|
|
|
1671 */
|
|
|
1672
|
|
|
1673 static int
|
|
398
|
1674 detect_coding_type (struct detection_state *st, const Extbyte *src,
|
|
259
|
1675 unsigned int n, int just_do_eol)
|
|
|
1676 {
|
|
|
1677 int c;
|
|
|
1678
|
|
|
1679 if (st->eol_type == EOL_AUTODETECT)
|
|
|
1680 st->eol_type = detect_eol_type (st, src, n);
|
|
|
1681
|
|
|
1682 if (just_do_eol)
|
|
|
1683 return st->eol_type != EOL_AUTODETECT;
|
|
|
1684
|
|
|
1685 if (!st->seen_non_ascii)
|
|
|
1686 {
|
|
|
1687 for (; n; n--, src++)
|
|
|
1688 {
|
|
|
1689 c = *src;
|
|
|
1690 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
1691 {
|
|
|
1692 st->seen_non_ascii = 1;
|
|
|
1693 #ifdef MULE
|
|
|
1694 st->shift_jis.mask = ~0;
|
|
|
1695 st->big5.mask = ~0;
|
|
396
|
1696 st->ucs4.mask = ~0;
|
|
|
1697 st->utf8.mask = ~0;
|
|
259
|
1698 st->iso2022.mask = ~0;
|
|
|
1699 #endif
|
|
|
1700 break;
|
|
|
1701 }
|
|
|
1702 }
|
|
|
1703 }
|
|
|
1704
|
|
|
1705 if (!n)
|
|
|
1706 return 0;
|
|
|
1707 #ifdef MULE
|
|
|
1708 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
|
1709 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
|
1710 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
|
1711 st->shift_jis.mask = detect_coding_sjis (st, src, n);
|
|
|
1712 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
|
1713 st->big5.mask = detect_coding_big5 (st, src, n);
|
|
396
|
1714 if (!mask_has_at_most_one_bit_p (st->utf8.mask))
|
|
|
1715 st->utf8.mask = detect_coding_utf8 (st, src, n);
|
|
|
1716 if (!mask_has_at_most_one_bit_p (st->ucs4.mask))
|
|
|
1717 st->ucs4.mask = detect_coding_ucs4 (st, src, n);
|
|
|
1718
|
|
|
1719 st->mask
|
|
|
1720 = st->iso2022.mask | st->shift_jis.mask | st->big5.mask
|
|
|
1721 | st->utf8.mask | st->ucs4.mask;
|
|
259
|
1722 #endif
|
|
|
1723 {
|
|
|
1724 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
|
1725 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
|
1726 return retval && st->eol_type != EOL_AUTODETECT;
|
|
|
1727 }
|
|
|
1728 }
|
|
|
1729
|
|
|
1730 static Lisp_Object
|
|
|
1731 coding_system_from_mask (int mask)
|
|
|
1732 {
|
|
|
1733 if (mask == ~0)
|
|
|
1734 {
|
|
|
1735 /* If the file was entirely or basically ASCII, use the
|
|
|
1736 default value of `buffer-file-coding-system'. */
|
|
|
1737 Lisp_Object retval =
|
|
|
1738 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
|
1739 if (!NILP (retval))
|
|
|
1740 {
|
|
|
1741 retval = Ffind_coding_system (retval);
|
|
|
1742 if (NILP (retval))
|
|
|
1743 {
|
|
|
1744 warn_when_safe
|
|
|
1745 (Qbad_variable, Qwarning,
|
|
|
1746 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
1747 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
|
1748 }
|
|
|
1749 }
|
|
|
1750 if (NILP (retval))
|
|
398
|
1751 retval = Fget_coding_system (Qraw_text);
|
|
259
|
1752 return retval;
|
|
|
1753 }
|
|
|
1754 else
|
|
|
1755 {
|
|
|
1756 int i;
|
|
|
1757 int cat = -1;
|
|
|
1758 #ifdef MULE
|
|
|
1759 mask = postprocess_iso2022_mask (mask);
|
|
|
1760 #endif
|
|
|
1761 /* Look through the coding categories by priority and find
|
|
|
1762 the first one that is allowed. */
|
|
|
1763 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1764 {
|
|
398
|
1765 cat = fcd->coding_category_by_priority[i];
|
|
259
|
1766 if ((mask & (1 << cat)) &&
|
|
398
|
1767 !NILP (fcd->coding_category_system[cat]))
|
|
259
|
1768 break;
|
|
|
1769 }
|
|
|
1770 if (cat >= 0)
|
|
398
|
1771 return fcd->coding_category_system[cat];
|
|
259
|
1772 else
|
|
398
|
1773 return Fget_coding_system (Qraw_text);
|
|
259
|
1774 }
|
|
|
1775 }
|
|
|
1776
|
|
|
1777 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
1778 as specified, do any autodetection that is called for. If the
|
|
398
|
1779 coding system and/or EOL type are not `autodetect', they will be left
|
|
259
|
1780 alone; but this function will never return an autodetect coding system
|
|
|
1781 or EOL type.
|
|
|
1782
|
|
|
1783 This function does not automatically fetch subsidiary coding systems;
|
|
|
1784 that should be unnecessary with the explicit eol-type argument. */
|
|
|
1785
|
|
398
|
1786 #define LENGTH(string_constant) (sizeof (string_constant) - 1)
|
|
|
1787
|
|
259
|
1788 void
|
|
|
1789 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
|
398
|
1790 eol_type_t *eol_type_in_out)
|
|
259
|
1791 {
|
|
|
1792 struct detection_state decst;
|
|
|
1793
|
|
|
1794 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1795 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
|
1796
|
|
272
|
1797 xzero (decst);
|
|
259
|
1798 decst.eol_type = *eol_type_in_out;
|
|
|
1799 decst.mask = ~0;
|
|
|
1800
|
|
|
1801 /* If autodetection is called for, do it now. */
|
|
398
|
1802 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
|
|
|
1803 || *eol_type_in_out == EOL_AUTODETECT)
|
|
259
|
1804 {
|
|
398
|
1805 Extbyte buf[4096];
|
|
|
1806 Lisp_Object coding_system = Qnil;
|
|
|
1807 Extbyte *p;
|
|
|
1808 ssize_t nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1809 Extbyte *scan_end;
|
|
|
1810
|
|
|
1811 /* Look for initial "-*-"; mode line prefix */
|
|
|
1812 for (p = buf,
|
|
|
1813 scan_end = buf + nread - LENGTH ("-*-coding:?-*-");
|
|
|
1814 p <= scan_end
|
|
|
1815 && *p != '\n'
|
|
|
1816 && *p != '\r';
|
|
|
1817 p++)
|
|
|
1818 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
1819 {
|
|
|
1820 Extbyte *local_vars_beg = p + 3;
|
|
|
1821 /* Look for final "-*-"; mode line suffix */
|
|
|
1822 for (p = local_vars_beg,
|
|
|
1823 scan_end = buf + nread - LENGTH ("-*-");
|
|
|
1824 p <= scan_end
|
|
|
1825 && *p != '\n'
|
|
|
1826 && *p != '\r';
|
|
|
1827 p++)
|
|
|
1828 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
1829 {
|
|
|
1830 Extbyte *suffix = p;
|
|
|
1831 /* Look for "coding:" */
|
|
|
1832 for (p = local_vars_beg,
|
|
|
1833 scan_end = suffix - LENGTH ("coding:?");
|
|
|
1834 p <= scan_end;
|
|
|
1835 p++)
|
|
|
1836 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0
|
|
|
1837 && (p == local_vars_beg
|
|
|
1838 || (*(p-1) == ' ' ||
|
|
|
1839 *(p-1) == '\t' ||
|
|
|
1840 *(p-1) == ';')))
|
|
|
1841 {
|
|
|
1842 Extbyte save;
|
|
|
1843 int n;
|
|
|
1844 p += LENGTH ("coding:");
|
|
|
1845 while (*p == ' ' || *p == '\t') p++;
|
|
|
1846
|
|
|
1847 /* Get coding system name */
|
|
|
1848 save = *suffix; *suffix = '\0';
|
|
|
1849 /* Characters valid in a MIME charset name (rfc 1521),
|
|
|
1850 and in a Lisp symbol name. */
|
|
|
1851 n = strspn ( (char *) p,
|
|
|
1852 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
1853 "abcdefghijklmnopqrstuvwxyz"
|
|
|
1854 "0123456789"
|
|
|
1855 "!$%&*+-.^_{|}~");
|
|
|
1856 *suffix = save;
|
|
|
1857 if (n > 0)
|
|
|
1858 {
|
|
|
1859 save = p[n]; p[n] = '\0';
|
|
|
1860 coding_system =
|
|
|
1861 Ffind_coding_system (intern ((char *) p));
|
|
|
1862 p[n] = save;
|
|
|
1863 }
|
|
|
1864 break;
|
|
|
1865 }
|
|
|
1866 break;
|
|
|
1867 }
|
|
259
|
1868 break;
|
|
398
|
1869 }
|
|
|
1870
|
|
|
1871 if (NILP (coding_system))
|
|
|
1872 do
|
|
|
1873 {
|
|
|
1874 if (detect_coding_type (&decst, buf, nread,
|
|
|
1875 XCODING_SYSTEM_TYPE (*codesys_in_out)
|
|
|
1876 != CODESYS_AUTODETECT))
|
|
|
1877 break;
|
|
|
1878 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1879 if (nread == 0)
|
|
|
1880 break;
|
|
|
1881 }
|
|
|
1882 while (1);
|
|
|
1883
|
|
|
1884 else if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
|
|
|
1885 && XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
|
1886 do
|
|
|
1887 {
|
|
|
1888 if (detect_coding_type (&decst, buf, nread, 1))
|
|
|
1889 break;
|
|
|
1890 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1891 if (!nread)
|
|
|
1892 break;
|
|
|
1893 }
|
|
|
1894 while (1);
|
|
259
|
1895
|
|
|
1896 *eol_type_in_out = decst.eol_type;
|
|
|
1897 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
|
398
|
1898 {
|
|
|
1899 if (NILP (coding_system))
|
|
|
1900 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
|
1901 else
|
|
|
1902 *codesys_in_out = coding_system;
|
|
|
1903 }
|
|
259
|
1904 }
|
|
|
1905
|
|
|
1906 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
|
1907 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1908 *eol_type_in_out = EOL_LF;
|
|
|
1909
|
|
|
1910 Lstream_rewind (stream);
|
|
|
1911 }
|
|
|
1912
|
|
|
1913 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
1914 Detect coding system of the text in the region between START and END.
|
|
|
1915 Returned a list of possible coding systems ordered by priority.
|
|
|
1916 If only ASCII characters are found, it returns 'undecided or one of
|
|
|
1917 its subsidiary coding systems according to a detected end-of-line
|
|
|
1918 type. Optional arg BUFFER defaults to the current buffer.
|
|
|
1919 */
|
|
|
1920 (start, end, buffer))
|
|
|
1921 {
|
|
|
1922 Lisp_Object val = Qnil;
|
|
|
1923 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1924 Bufpos b, e;
|
|
|
1925 Lisp_Object instream, lb_instream;
|
|
|
1926 Lstream *istr, *lb_istr;
|
|
|
1927 struct detection_state decst;
|
|
|
1928 struct gcpro gcpro1, gcpro2;
|
|
|
1929
|
|
|
1930 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
1931 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1932 lb_istr = XLSTREAM (lb_instream);
|
|
|
1933 instream = make_encoding_input_stream (lb_istr, Fget_coding_system (Qbinary));
|
|
|
1934 istr = XLSTREAM (instream);
|
|
|
1935 GCPRO2 (instream, lb_instream);
|
|
272
|
1936 xzero (decst);
|
|
259
|
1937 decst.eol_type = EOL_AUTODETECT;
|
|
|
1938 decst.mask = ~0;
|
|
|
1939 while (1)
|
|
|
1940 {
|
|
|
1941 unsigned char random_buffer[4096];
|
|
398
|
1942 ssize_t nread = Lstream_read (istr, random_buffer, sizeof (random_buffer));
|
|
259
|
1943
|
|
|
1944 if (!nread)
|
|
|
1945 break;
|
|
|
1946 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
|
1947 break;
|
|
|
1948 }
|
|
|
1949
|
|
|
1950 if (decst.mask == ~0)
|
|
|
1951 val = subsidiary_coding_system (Fget_coding_system (Qundecided),
|
|
|
1952 decst.eol_type);
|
|
|
1953 else
|
|
|
1954 {
|
|
|
1955 int i;
|
|
|
1956
|
|
|
1957 val = Qnil;
|
|
|
1958 #ifdef MULE
|
|
|
1959 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
|
1960 #endif
|
|
|
1961 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1962 {
|
|
398
|
1963 int sys = fcd->coding_category_by_priority[i];
|
|
259
|
1964 if (decst.mask & (1 << sys))
|
|
|
1965 {
|
|
398
|
1966 Lisp_Object codesys = fcd->coding_category_system[sys];
|
|
259
|
1967 if (!NILP (codesys))
|
|
|
1968 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
|
1969 val = Fcons (codesys, val);
|
|
|
1970 }
|
|
|
1971 }
|
|
|
1972 }
|
|
|
1973 Lstream_close (istr);
|
|
|
1974 UNGCPRO;
|
|
|
1975 Lstream_delete (istr);
|
|
|
1976 Lstream_delete (lb_istr);
|
|
|
1977 return val;
|
|
|
1978 }
|
|
|
1979
|
|
|
1980
|
|
|
1981 /************************************************************************/
|
|
|
1982 /* Converting to internal Mule format ("decoding") */
|
|
|
1983 /************************************************************************/
|
|
|
1984
|
|
|
1985 /* A decoding stream is a stream used for decoding text (i.e.
|
|
|
1986 converting from some external format to internal format).
|
|
|
1987 The decoding-stream object keeps track of the actual coding
|
|
|
1988 stream, the stream that is at the other end, and data that
|
|
|
1989 needs to be persistent across the lifetime of the stream. */
|
|
|
1990
|
|
|
1991 /* Handle the EOL stuff related to just-read-in character C.
|
|
|
1992 EOL_TYPE is the EOL type of the coding stream.
|
|
|
1993 FLAGS is the current value of FLAGS in the coding stream, and may
|
|
|
1994 be modified by this macro. (The macro only looks at the
|
|
|
1995 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
|
|
|
1996 bytes are to be written. You need to also define a local goto
|
|
|
1997 label "label_continue_loop" that is at the end of the main
|
|
|
1998 character-reading loop.
|
|
|
1999
|
|
|
2000 If C is a CR character, then this macro handles it entirely and
|
|
|
2001 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
|
2002 anything to DST, and continues normally. You should continue
|
|
|
2003 processing C normally after this macro. */
|
|
|
2004
|
|
|
2005 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
|
|
|
2006 do { \
|
|
|
2007 if (c == '\r') \
|
|
|
2008 { \
|
|
|
2009 if (eol_type == EOL_CR) \
|
|
|
2010 Dynarr_add (dst, '\n'); \
|
|
|
2011 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
|
2012 Dynarr_add (dst, c); \
|
|
|
2013 else \
|
|
|
2014 flags |= CODING_STATE_CR; \
|
|
|
2015 goto label_continue_loop; \
|
|
|
2016 } \
|
|
|
2017 else if (flags & CODING_STATE_CR) \
|
|
|
2018 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
|
|
|
2019 if (c != '\n') \
|
|
|
2020 Dynarr_add (dst, '\r'); \
|
|
|
2021 flags &= ~CODING_STATE_CR; \
|
|
|
2022 } \
|
|
|
2023 } while (0)
|
|
|
2024
|
|
|
2025 /* C should be a binary character in the range 0 - 255; convert
|
|
|
2026 to internal format and add to Dynarr DST. */
|
|
|
2027
|
|
|
2028 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
|
2029 do { \
|
|
|
2030 if (BYTE_ASCII_P (c)) \
|
|
|
2031 Dynarr_add (dst, c); \
|
|
|
2032 else if (BYTE_C1_P (c)) \
|
|
|
2033 { \
|
|
|
2034 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
|
2035 Dynarr_add (dst, c + 0x20); \
|
|
|
2036 } \
|
|
|
2037 else \
|
|
|
2038 { \
|
|
|
2039 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
|
|
|
2040 Dynarr_add (dst, c); \
|
|
|
2041 } \
|
|
|
2042 } while (0)
|
|
|
2043
|
|
|
2044 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
|
2045 do { \
|
|
|
2046 if (ch) \
|
|
|
2047 { \
|
|
|
2048 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
|
2049 ch = 0; \
|
|
|
2050 } \
|
|
|
2051 } while (0)
|
|
|
2052
|
|
|
2053 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
|
|
|
2054 do { \
|
|
398
|
2055 if (flags & CODING_STATE_END) \
|
|
|
2056 { \
|
|
|
2057 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
|
2058 if (flags & CODING_STATE_CR) \
|
|
|
2059 Dynarr_add (dst, '\r'); \
|
|
|
2060 } \
|
|
259
|
2061 } while (0)
|
|
|
2062
|
|
|
2063 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
|
2064
|
|
|
2065 struct decoding_stream
|
|
|
2066 {
|
|
|
2067 /* Coding system that governs the conversion. */
|
|
396
|
2068 Lisp_Coding_System *codesys;
|
|
259
|
2069
|
|
|
2070 /* Stream that we read the encoded data from or
|
|
|
2071 write the decoded data to. */
|
|
|
2072 Lstream *other_end;
|
|
|
2073
|
|
|
2074 /* If we are reading, then we can return only a fixed amount of
|
|
|
2075 data, so if the conversion resulted in too much data, we store it
|
|
|
2076 here for retrieval the next time around. */
|
|
|
2077 unsigned_char_dynarr *runoff;
|
|
|
2078
|
|
|
2079 /* FLAGS holds flags indicating the current state of the decoding.
|
|
|
2080 Some of these flags are dependent on the coding system. */
|
|
|
2081 unsigned int flags;
|
|
|
2082
|
|
|
2083 /* CH holds a partially built-up character. Since we only deal
|
|
|
2084 with one- and two-byte characters at the moment, we only use
|
|
|
2085 this to store the first byte of a two-byte character. */
|
|
|
2086 unsigned int ch;
|
|
|
2087
|
|
|
2088 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
|
2089 currently applies. We need to keep this separate from the
|
|
|
2090 EOL type stored in CODESYS because the latter might indicate
|
|
|
2091 automatic EOL-type detection while the former will always
|
|
|
2092 indicate a particular EOL type. */
|
|
398
|
2093 eol_type_t eol_type;
|
|
259
|
2094 #ifdef MULE
|
|
|
2095 /* Additional ISO2022 information. We define the structure above
|
|
|
2096 because it's also needed by the detection routines. */
|
|
|
2097 struct iso2022_decoder iso2022;
|
|
|
2098
|
|
|
2099 /* Additional information (the state of the running CCL program)
|
|
|
2100 used by the CCL decoder. */
|
|
|
2101 struct ccl_program ccl;
|
|
398
|
2102
|
|
|
2103 /* counter for UTF-8 or UCS-4 */
|
|
|
2104 unsigned char counter;
|
|
259
|
2105 #endif
|
|
|
2106 struct detection_state decst;
|
|
|
2107 };
|
|
|
2108
|
|
398
|
2109 static ssize_t decoding_reader (Lstream *stream,
|
|
|
2110 unsigned char *data, size_t size);
|
|
|
2111 static ssize_t decoding_writer (Lstream *stream,
|
|
|
2112 const unsigned char *data, size_t size);
|
|
259
|
2113 static int decoding_rewinder (Lstream *stream);
|
|
|
2114 static int decoding_seekable_p (Lstream *stream);
|
|
|
2115 static int decoding_flusher (Lstream *stream);
|
|
|
2116 static int decoding_closer (Lstream *stream);
|
|
|
2117
|
|
398
|
2118 static Lisp_Object decoding_marker (Lisp_Object stream);
|
|
259
|
2119
|
|
|
2120 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
|
2121 sizeof (struct decoding_stream));
|
|
|
2122
|
|
|
2123 static Lisp_Object
|
|
398
|
2124 decoding_marker (Lisp_Object stream)
|
|
259
|
2125 {
|
|
|
2126 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2127 Lisp_Object str_obj;
|
|
|
2128
|
|
|
2129 /* We do not need to mark the coding systems or charsets stored
|
|
|
2130 within the stream because they are stored in a global list
|
|
|
2131 and automatically marked. */
|
|
|
2132
|
|
|
2133 XSETLSTREAM (str_obj, str);
|
|
398
|
2134 mark_object (str_obj);
|
|
259
|
2135 if (str->imp->marker)
|
|
398
|
2136 return (str->imp->marker) (str_obj);
|
|
259
|
2137 else
|
|
|
2138 return Qnil;
|
|
|
2139 }
|
|
|
2140
|
|
|
2141 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
|
2142 so we read data from the other end, decode it, and store it into DATA. */
|
|
|
2143
|
|
398
|
2144 static ssize_t
|
|
272
|
2145 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
259
|
2146 {
|
|
|
2147 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2148 unsigned char *orig_data = data;
|
|
398
|
2149 ssize_t read_size;
|
|
259
|
2150 int error_occurred = 0;
|
|
|
2151
|
|
|
2152 /* We need to interface to mule_decode(), which expects to take some
|
|
|
2153 amount of data and store the result into a Dynarr. We have
|
|
|
2154 mule_decode() store into str->runoff, and take data from there
|
|
|
2155 as necessary. */
|
|
|
2156
|
|
|
2157 /* We loop until we have enough data, reading chunks from the other
|
|
|
2158 end and decoding it. */
|
|
|
2159 while (1)
|
|
|
2160 {
|
|
|
2161 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2162 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2163 if (Dynarr_length (str->runoff) > 0)
|
|
|
2164 {
|
|
272
|
2165 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
|
|
259
|
2166 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2167 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2168 data += chunk;
|
|
|
2169 size -= chunk;
|
|
|
2170 }
|
|
|
2171
|
|
|
2172 if (size == 0)
|
|
|
2173 break; /* No more room for data */
|
|
|
2174
|
|
|
2175 if (str->flags & CODING_STATE_END)
|
|
|
2176 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2177 the other end. We loop once more so that mule_decode() can
|
|
|
2178 output any final stuff it may be holding, or any "go back
|
|
|
2179 to a sane state" escape sequences. (This latter makes sense
|
|
|
2180 during encoding.) */
|
|
|
2181 break;
|
|
|
2182
|
|
|
2183 /* Exhausted the runoff, so get some more. DATA has at least
|
|
|
2184 SIZE bytes left of storage in it, so it's OK to read directly
|
|
|
2185 into it. (We'll be overwriting above, after we've decoded it
|
|
|
2186 into the runoff.) */
|
|
|
2187 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2188 if (read_size < 0)
|
|
|
2189 {
|
|
|
2190 error_occurred = 1;
|
|
|
2191 break;
|
|
|
2192 }
|
|
|
2193 if (read_size == 0)
|
|
|
2194 /* There might be some more end data produced in the translation.
|
|
|
2195 See the comment above. */
|
|
|
2196 str->flags |= CODING_STATE_END;
|
|
|
2197 mule_decode (stream, data, str->runoff, read_size);
|
|
|
2198 }
|
|
|
2199
|
|
|
2200 if (data - orig_data == 0)
|
|
|
2201 return error_occurred ? -1 : 0;
|
|
|
2202 else
|
|
|
2203 return data - orig_data;
|
|
|
2204 }
|
|
|
2205
|
|
398
|
2206 static ssize_t
|
|
|
2207 decoding_writer (Lstream *stream, const unsigned char *data, size_t size)
|
|
259
|
2208 {
|
|
|
2209 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
398
|
2210 ssize_t retval;
|
|
259
|
2211
|
|
|
2212 /* Decode all our data into the runoff, and then attempt to write
|
|
|
2213 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2214 in writing. */
|
|
|
2215 mule_decode (stream, data, str->runoff, size);
|
|
|
2216 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2217 Dynarr_length (str->runoff));
|
|
|
2218 if (retval > 0)
|
|
|
2219 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2220 /* Do NOT return retval. The return value indicates how much
|
|
|
2221 of the incoming data was written, not how many bytes were
|
|
|
2222 written. */
|
|
|
2223 return size;
|
|
|
2224 }
|
|
|
2225
|
|
|
2226 static void
|
|
|
2227 reset_decoding_stream (struct decoding_stream *str)
|
|
|
2228 {
|
|
|
2229 #ifdef MULE
|
|
|
2230 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
2231 {
|
|
272
|
2232 Lisp_Object coding_system;
|
|
259
|
2233 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2234 reset_iso2022 (coding_system, &str->iso2022);
|
|
|
2235 }
|
|
|
2236 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
2237 {
|
|
|
2238 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
|
|
|
2239 }
|
|
398
|
2240 str->counter = 0;
|
|
272
|
2241 #endif /* MULE */
|
|
404
|
2242 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT
|
|
|
2243 || CODING_SYSTEM_EOL_TYPE (str->codesys) == EOL_AUTODETECT)
|
|
|
2244 {
|
|
|
2245 xzero (str->decst);
|
|
|
2246 str->decst.eol_type = EOL_AUTODETECT;
|
|
|
2247 str->decst.mask = ~0;
|
|
|
2248 }
|
|
259
|
2249 str->flags = str->ch = 0;
|
|
|
2250 }
|
|
|
2251
|
|
|
2252 static int
|
|
|
2253 decoding_rewinder (Lstream *stream)
|
|
|
2254 {
|
|
|
2255 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2256 reset_decoding_stream (str);
|
|
|
2257 Dynarr_reset (str->runoff);
|
|
|
2258 return Lstream_rewind (str->other_end);
|
|
|
2259 }
|
|
|
2260
|
|
|
2261 static int
|
|
|
2262 decoding_seekable_p (Lstream *stream)
|
|
|
2263 {
|
|
|
2264 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2265 return Lstream_seekable_p (str->other_end);
|
|
|
2266 }
|
|
|
2267
|
|
|
2268 static int
|
|
|
2269 decoding_flusher (Lstream *stream)
|
|
|
2270 {
|
|
|
2271 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2272 return Lstream_flush (str->other_end);
|
|
|
2273 }
|
|
|
2274
|
|
|
2275 static int
|
|
|
2276 decoding_closer (Lstream *stream)
|
|
|
2277 {
|
|
|
2278 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2279 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2280 {
|
|
|
2281 str->flags |= CODING_STATE_END;
|
|
|
2282 decoding_writer (stream, 0, 0);
|
|
|
2283 }
|
|
|
2284 Dynarr_free (str->runoff);
|
|
|
2285 #ifdef MULE
|
|
396
|
2286 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
2287 if (str->iso2022.composite_chars)
|
|
|
2288 Dynarr_free (str->iso2022.composite_chars);
|
|
|
2289 #endif
|
|
396
|
2290 #endif
|
|
259
|
2291 return Lstream_close (str->other_end);
|
|
|
2292 }
|
|
|
2293
|
|
|
2294 Lisp_Object
|
|
|
2295 decoding_stream_coding_system (Lstream *stream)
|
|
|
2296 {
|
|
272
|
2297 Lisp_Object coding_system;
|
|
259
|
2298 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2299
|
|
|
2300 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2301 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
|
2302 }
|
|
|
2303
|
|
|
2304 void
|
|
|
2305 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2306 {
|
|
396
|
2307 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
259
|
2308 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2309 str->codesys = cs;
|
|
|
2310 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
2311 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
|
2312 reset_decoding_stream (str);
|
|
|
2313 }
|
|
|
2314
|
|
|
2315 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
|
2316 stream for writing, no automatic code detection will be performed.
|
|
|
2317 The reason for this is that automatic code detection requires a
|
|
|
2318 seekable input. Things will also fail if you open a decoding
|
|
|
2319 stream for reading using a non-fully-specified coding system and
|
|
|
2320 a non-seekable input stream. */
|
|
|
2321
|
|
|
2322 static Lisp_Object
|
|
|
2323 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
398
|
2324 const char *mode)
|
|
259
|
2325 {
|
|
|
2326 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
|
2327 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2328 Lisp_Object obj;
|
|
|
2329
|
|
272
|
2330 xzero (*str);
|
|
259
|
2331 str->other_end = stream;
|
|
|
2332 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
|
|
|
2333 str->eol_type = EOL_AUTODETECT;
|
|
|
2334 if (!strcmp (mode, "r")
|
|
|
2335 && Lstream_seekable_p (stream))
|
|
|
2336 /* We can determine the coding system now. */
|
|
|
2337 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
|
2338 set_decoding_stream_coding_system (lstr, codesys);
|
|
|
2339 str->decst.eol_type = str->eol_type;
|
|
|
2340 str->decst.mask = ~0;
|
|
|
2341 XSETLSTREAM (obj, lstr);
|
|
|
2342 return obj;
|
|
|
2343 }
|
|
|
2344
|
|
|
2345 Lisp_Object
|
|
|
2346 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2347 {
|
|
|
2348 return make_decoding_stream_1 (stream, codesys, "r");
|
|
|
2349 }
|
|
|
2350
|
|
|
2351 Lisp_Object
|
|
|
2352 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2353 {
|
|
|
2354 return make_decoding_stream_1 (stream, codesys, "w");
|
|
|
2355 }
|
|
|
2356
|
|
|
2357 /* Note: the decode_coding_* functions all take the same
|
|
|
2358 arguments as mule_decode(), which is to say some SRC data of
|
|
|
2359 size N, which is to be stored into dynamic array DST.
|
|
|
2360 DECODING is the stream within which the decoding is
|
|
|
2361 taking place, but no data is actually read from or
|
|
|
2362 written to that stream; that is handled in decoding_reader()
|
|
|
2363 or decoding_writer(). This allows the same functions to
|
|
|
2364 be used for both reading and writing. */
|
|
|
2365
|
|
|
2366 static void
|
|
398
|
2367 mule_decode (Lstream *decoding, const unsigned char *src,
|
|
259
|
2368 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2369 {
|
|
|
2370 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2371
|
|
|
2372 /* If necessary, do encoding-detection now. We do this when
|
|
|
2373 we're a writing stream or a non-seekable reading stream,
|
|
|
2374 meaning that we can't just process the whole input,
|
|
|
2375 rewind, and start over. */
|
|
|
2376
|
|
|
2377 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
|
2378 str->eol_type == EOL_AUTODETECT)
|
|
|
2379 {
|
|
272
|
2380 Lisp_Object codesys;
|
|
259
|
2381
|
|
|
2382 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
|
2383 detect_coding_type (&str->decst, src, n,
|
|
|
2384 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
|
2385 CODESYS_AUTODETECT);
|
|
|
2386 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
|
2387 str->decst.mask != ~0)
|
|
|
2388 /* #### This is cheesy. What we really ought to do is
|
|
|
2389 buffer up a certain amount of data so as to get a
|
|
|
2390 less random result. */
|
|
|
2391 codesys = coding_system_from_mask (str->decst.mask);
|
|
|
2392 str->eol_type = str->decst.eol_type;
|
|
|
2393 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
|
2394 {
|
|
|
2395 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
|
2396 If we erase it, bad things might happen. */
|
|
|
2397 int was_end = str->flags & CODING_STATE_END;
|
|
|
2398 set_decoding_stream_coding_system (decoding, codesys);
|
|
|
2399 if (was_end)
|
|
|
2400 str->flags |= CODING_STATE_END;
|
|
|
2401 }
|
|
|
2402 }
|
|
|
2403
|
|
|
2404 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2405 {
|
|
|
2406 #ifdef DEBUG_XEMACS
|
|
|
2407 case CODESYS_INTERNAL:
|
|
|
2408 Dynarr_add_many (dst, src, n);
|
|
|
2409 break;
|
|
|
2410 #endif
|
|
|
2411 case CODESYS_AUTODETECT:
|
|
|
2412 /* If we got this far and still haven't decided on the coding
|
|
|
2413 system, then do no conversion. */
|
|
|
2414 case CODESYS_NO_CONVERSION:
|
|
|
2415 decode_coding_no_conversion (decoding, src, dst, n);
|
|
|
2416 break;
|
|
|
2417 #ifdef MULE
|
|
|
2418 case CODESYS_SHIFT_JIS:
|
|
|
2419 decode_coding_sjis (decoding, src, dst, n);
|
|
|
2420 break;
|
|
|
2421 case CODESYS_BIG5:
|
|
|
2422 decode_coding_big5 (decoding, src, dst, n);
|
|
|
2423 break;
|
|
396
|
2424 case CODESYS_UCS4:
|
|
|
2425 decode_coding_ucs4 (decoding, src, dst, n);
|
|
|
2426 break;
|
|
|
2427 case CODESYS_UTF8:
|
|
|
2428 decode_coding_utf8 (decoding, src, dst, n);
|
|
|
2429 break;
|
|
259
|
2430 case CODESYS_CCL:
|
|
398
|
2431 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
|
2432 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_DECODING);
|
|
259
|
2433 break;
|
|
|
2434 case CODESYS_ISO2022:
|
|
|
2435 decode_coding_iso2022 (decoding, src, dst, n);
|
|
|
2436 break;
|
|
272
|
2437 #endif /* MULE */
|
|
259
|
2438 default:
|
|
|
2439 abort ();
|
|
|
2440 }
|
|
|
2441 }
|
|
|
2442
|
|
|
2443 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
2444 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
2445 This is useful if you've read in encoded text from a file without decoding
|
|
|
2446 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
2447 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
|
2448 Return length of decoded text.
|
|
|
2449 BUFFER defaults to the current buffer if unspecified.
|
|
|
2450 */
|
|
|
2451 (start, end, coding_system, buffer))
|
|
|
2452 {
|
|
|
2453 Bufpos b, e;
|
|
|
2454 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2455 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2456 Lstream *istr, *ostr;
|
|
|
2457 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2458
|
|
|
2459 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2460
|
|
|
2461 barf_if_buffer_read_only (buf, b, e);
|
|
|
2462
|
|
|
2463 coding_system = Fget_coding_system (coding_system);
|
|
|
2464 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2465 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2466 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2467 coding_system);
|
|
|
2468 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2469 Fget_coding_system (Qbinary));
|
|
|
2470 istr = XLSTREAM (instream);
|
|
|
2471 ostr = XLSTREAM (outstream);
|
|
|
2472 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
|
|
|
2473
|
|
|
2474 /* The chain of streams looks like this:
|
|
|
2475
|
|
|
2476 [BUFFER] <----- send through
|
|
|
2477 ------> [ENCODE AS BINARY]
|
|
|
2478 ------> [DECODE AS SPECIFIED]
|
|
|
2479 ------> [BUFFER]
|
|
|
2480 */
|
|
|
2481
|
|
|
2482 while (1)
|
|
|
2483 {
|
|
|
2484 char tempbuf[1024]; /* some random amount */
|
|
|
2485 Bufpos newpos, even_newer_pos;
|
|
|
2486 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
398
|
2487 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
259
|
2488
|
|
|
2489 if (!size_in_bytes)
|
|
|
2490 break;
|
|
|
2491 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2492 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2493 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2494 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2495 even_newer_pos, 0);
|
|
|
2496 }
|
|
|
2497 Lstream_close (istr);
|
|
|
2498 Lstream_close (ostr);
|
|
|
2499 UNGCPRO;
|
|
|
2500 Lstream_delete (istr);
|
|
|
2501 Lstream_delete (ostr);
|
|
|
2502 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2503 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2504 return Qnil;
|
|
|
2505 }
|
|
|
2506
|
|
|
2507
|
|
|
2508 /************************************************************************/
|
|
|
2509 /* Converting to an external encoding ("encoding") */
|
|
|
2510 /************************************************************************/
|
|
|
2511
|
|
|
2512 /* An encoding stream is an output stream. When you create the
|
|
|
2513 stream, you specify the coding system that governs the encoding
|
|
|
2514 and another stream that the resulting encoded data is to be
|
|
|
2515 sent to, and then start sending data to it. */
|
|
|
2516
|
|
|
2517 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
|
2518
|
|
|
2519 struct encoding_stream
|
|
|
2520 {
|
|
|
2521 /* Coding system that governs the conversion. */
|
|
396
|
2522 Lisp_Coding_System *codesys;
|
|
259
|
2523
|
|
|
2524 /* Stream that we read the encoded data from or
|
|
|
2525 write the decoded data to. */
|
|
|
2526 Lstream *other_end;
|
|
|
2527
|
|
|
2528 /* If we are reading, then we can return only a fixed amount of
|
|
|
2529 data, so if the conversion resulted in too much data, we store it
|
|
|
2530 here for retrieval the next time around. */
|
|
|
2531 unsigned_char_dynarr *runoff;
|
|
|
2532
|
|
|
2533 /* FLAGS holds flags indicating the current state of the encoding.
|
|
|
2534 Some of these flags are dependent on the coding system. */
|
|
|
2535 unsigned int flags;
|
|
|
2536
|
|
|
2537 /* CH holds a partially built-up character. Since we only deal
|
|
|
2538 with one- and two-byte characters at the moment, we only use
|
|
|
2539 this to store the first byte of a two-byte character. */
|
|
|
2540 unsigned int ch;
|
|
|
2541 #ifdef MULE
|
|
|
2542 /* Additional information used by the ISO2022 encoder. */
|
|
|
2543 struct
|
|
|
2544 {
|
|
|
2545 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
2546 through G3 registers. It is initialized from the array
|
|
|
2547 INITIAL_CHARSET in CODESYS. */
|
|
|
2548 Lisp_Object charset[4];
|
|
|
2549
|
|
|
2550 /* Which registers are currently invoked into the left (GL) and
|
|
|
2551 right (GR) halves of the 8-bit encoding space? */
|
|
|
2552 int register_left, register_right;
|
|
|
2553
|
|
|
2554 /* Whether we need to explicitly designate the charset in the
|
|
|
2555 G? register before using it. It is initialized from the
|
|
|
2556 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
|
2557 unsigned char force_charset_on_output[4];
|
|
|
2558
|
|
|
2559 /* Other state variables that need to be preserved across
|
|
|
2560 invocations. */
|
|
|
2561 Lisp_Object current_charset;
|
|
|
2562 int current_half;
|
|
|
2563 int current_char_boundary;
|
|
|
2564 } iso2022;
|
|
|
2565
|
|
|
2566 /* Additional information (the state of the running CCL program)
|
|
|
2567 used by the CCL encoder. */
|
|
|
2568 struct ccl_program ccl;
|
|
272
|
2569 #endif /* MULE */
|
|
259
|
2570 };
|
|
|
2571
|
|
398
|
2572 static ssize_t encoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
|
2573 static ssize_t encoding_writer (Lstream *stream, const unsigned char *data,
|
|
|
2574 size_t size);
|
|
259
|
2575 static int encoding_rewinder (Lstream *stream);
|
|
|
2576 static int encoding_seekable_p (Lstream *stream);
|
|
|
2577 static int encoding_flusher (Lstream *stream);
|
|
|
2578 static int encoding_closer (Lstream *stream);
|
|
|
2579
|
|
398
|
2580 static Lisp_Object encoding_marker (Lisp_Object stream);
|
|
259
|
2581
|
|
|
2582 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
|
2583 sizeof (struct encoding_stream));
|
|
|
2584
|
|
|
2585 static Lisp_Object
|
|
398
|
2586 encoding_marker (Lisp_Object stream)
|
|
259
|
2587 {
|
|
|
2588 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2589 Lisp_Object str_obj;
|
|
|
2590
|
|
|
2591 /* We do not need to mark the coding systems or charsets stored
|
|
|
2592 within the stream because they are stored in a global list
|
|
|
2593 and automatically marked. */
|
|
|
2594
|
|
|
2595 XSETLSTREAM (str_obj, str);
|
|
398
|
2596 mark_object (str_obj);
|
|
259
|
2597 if (str->imp->marker)
|
|
398
|
2598 return (str->imp->marker) (str_obj);
|
|
259
|
2599 else
|
|
|
2600 return Qnil;
|
|
|
2601 }
|
|
|
2602
|
|
|
2603 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
|
2604 so we read data from the other end, encode it, and store it into DATA. */
|
|
|
2605
|
|
398
|
2606 static ssize_t
|
|
272
|
2607 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
259
|
2608 {
|
|
|
2609 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2610 unsigned char *orig_data = data;
|
|
398
|
2611 ssize_t read_size;
|
|
259
|
2612 int error_occurred = 0;
|
|
|
2613
|
|
|
2614 /* We need to interface to mule_encode(), which expects to take some
|
|
|
2615 amount of data and store the result into a Dynarr. We have
|
|
|
2616 mule_encode() store into str->runoff, and take data from there
|
|
|
2617 as necessary. */
|
|
|
2618
|
|
|
2619 /* We loop until we have enough data, reading chunks from the other
|
|
|
2620 end and encoding it. */
|
|
|
2621 while (1)
|
|
|
2622 {
|
|
|
2623 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2624 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2625 if (Dynarr_length (str->runoff) > 0)
|
|
|
2626 {
|
|
272
|
2627 int chunk = min ((int) size, Dynarr_length (str->runoff));
|
|
259
|
2628 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2629 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2630 data += chunk;
|
|
|
2631 size -= chunk;
|
|
|
2632 }
|
|
|
2633
|
|
|
2634 if (size == 0)
|
|
|
2635 break; /* No more room for data */
|
|
|
2636
|
|
|
2637 if (str->flags & CODING_STATE_END)
|
|
|
2638 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2639 the other end. We loop once more so that mule_encode() can
|
|
|
2640 output any final stuff it may be holding, or any "go back
|
|
|
2641 to a sane state" escape sequences. (This latter makes sense
|
|
|
2642 during encoding.) */
|
|
|
2643 break;
|
|
|
2644
|
|
|
2645 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
|
2646 left of storage in it, so it's OK to read directly into it.
|
|
|
2647 (We'll be overwriting above, after we've encoded it into the
|
|
|
2648 runoff.) */
|
|
|
2649 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2650 if (read_size < 0)
|
|
|
2651 {
|
|
|
2652 error_occurred = 1;
|
|
|
2653 break;
|
|
|
2654 }
|
|
|
2655 if (read_size == 0)
|
|
|
2656 /* There might be some more end data produced in the translation.
|
|
|
2657 See the comment above. */
|
|
|
2658 str->flags |= CODING_STATE_END;
|
|
|
2659 mule_encode (stream, data, str->runoff, read_size);
|
|
|
2660 }
|
|
|
2661
|
|
|
2662 if (data == orig_data)
|
|
|
2663 return error_occurred ? -1 : 0;
|
|
|
2664 else
|
|
|
2665 return data - orig_data;
|
|
|
2666 }
|
|
|
2667
|
|
398
|
2668 static ssize_t
|
|
|
2669 encoding_writer (Lstream *stream, const unsigned char *data, size_t size)
|
|
259
|
2670 {
|
|
|
2671 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
398
|
2672 ssize_t retval;
|
|
259
|
2673
|
|
|
2674 /* Encode all our data into the runoff, and then attempt to write
|
|
|
2675 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2676 in writing. */
|
|
|
2677 mule_encode (stream, data, str->runoff, size);
|
|
|
2678 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2679 Dynarr_length (str->runoff));
|
|
|
2680 if (retval > 0)
|
|
|
2681 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2682 /* Do NOT return retval. The return value indicates how much
|
|
|
2683 of the incoming data was written, not how many bytes were
|
|
|
2684 written. */
|
|
|
2685 return size;
|
|
|
2686 }
|
|
|
2687
|
|
|
2688 static void
|
|
|
2689 reset_encoding_stream (struct encoding_stream *str)
|
|
|
2690 {
|
|
272
|
2691 #ifdef MULE
|
|
259
|
2692 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2693 {
|
|
|
2694 case CODESYS_ISO2022:
|
|
|
2695 {
|
|
|
2696 int i;
|
|
|
2697
|
|
|
2698 for (i = 0; i < 4; i++)
|
|
|
2699 {
|
|
|
2700 str->iso2022.charset[i] =
|
|
|
2701 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
|
2702 str->iso2022.force_charset_on_output[i] =
|
|
|
2703 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
|
2704 }
|
|
|
2705 str->iso2022.register_left = 0;
|
|
|
2706 str->iso2022.register_right = 1;
|
|
|
2707 str->iso2022.current_charset = Qnil;
|
|
|
2708 str->iso2022.current_half = 0;
|
|
|
2709 str->iso2022.current_char_boundary = 1;
|
|
|
2710 break;
|
|
|
2711 }
|
|
|
2712 case CODESYS_CCL:
|
|
|
2713 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
|
|
|
2714 break;
|
|
|
2715 default:
|
|
|
2716 break;
|
|
|
2717 }
|
|
272
|
2718 #endif /* MULE */
|
|
259
|
2719
|
|
|
2720 str->flags = str->ch = 0;
|
|
|
2721 }
|
|
|
2722
|
|
|
2723 static int
|
|
|
2724 encoding_rewinder (Lstream *stream)
|
|
|
2725 {
|
|
|
2726 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2727 reset_encoding_stream (str);
|
|
|
2728 Dynarr_reset (str->runoff);
|
|
|
2729 return Lstream_rewind (str->other_end);
|
|
|
2730 }
|
|
|
2731
|
|
|
2732 static int
|
|
|
2733 encoding_seekable_p (Lstream *stream)
|
|
|
2734 {
|
|
|
2735 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2736 return Lstream_seekable_p (str->other_end);
|
|
|
2737 }
|
|
|
2738
|
|
|
2739 static int
|
|
|
2740 encoding_flusher (Lstream *stream)
|
|
|
2741 {
|
|
|
2742 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2743 return Lstream_flush (str->other_end);
|
|
|
2744 }
|
|
|
2745
|
|
|
2746 static int
|
|
|
2747 encoding_closer (Lstream *stream)
|
|
|
2748 {
|
|
|
2749 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2750 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2751 {
|
|
|
2752 str->flags |= CODING_STATE_END;
|
|
|
2753 encoding_writer (stream, 0, 0);
|
|
|
2754 }
|
|
|
2755 Dynarr_free (str->runoff);
|
|
|
2756 return Lstream_close (str->other_end);
|
|
|
2757 }
|
|
|
2758
|
|
|
2759 Lisp_Object
|
|
|
2760 encoding_stream_coding_system (Lstream *stream)
|
|
|
2761 {
|
|
272
|
2762 Lisp_Object coding_system;
|
|
259
|
2763 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2764
|
|
|
2765 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2766 return coding_system;
|
|
|
2767 }
|
|
|
2768
|
|
|
2769 void
|
|
|
2770 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2771 {
|
|
396
|
2772 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
259
|
2773 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2774 str->codesys = cs;
|
|
|
2775 reset_encoding_stream (str);
|
|
|
2776 }
|
|
|
2777
|
|
|
2778 static Lisp_Object
|
|
|
2779 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
398
|
2780 const char *mode)
|
|
259
|
2781 {
|
|
|
2782 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
|
2783 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2784 Lisp_Object obj;
|
|
|
2785
|
|
272
|
2786 xzero (*str);
|
|
259
|
2787 str->runoff = Dynarr_new (unsigned_char);
|
|
|
2788 str->other_end = stream;
|
|
|
2789 set_encoding_stream_coding_system (lstr, codesys);
|
|
|
2790 XSETLSTREAM (obj, lstr);
|
|
|
2791 return obj;
|
|
|
2792 }
|
|
|
2793
|
|
|
2794 Lisp_Object
|
|
|
2795 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2796 {
|
|
|
2797 return make_encoding_stream_1 (stream, codesys, "r");
|
|
|
2798 }
|
|
|
2799
|
|
|
2800 Lisp_Object
|
|
|
2801 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2802 {
|
|
|
2803 return make_encoding_stream_1 (stream, codesys, "w");
|
|
|
2804 }
|
|
|
2805
|
|
|
2806 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
|
2807 external format, according to the encoding stream ENCODING.
|
|
|
2808 Store the encoded data into DST. */
|
|
|
2809
|
|
|
2810 static void
|
|
398
|
2811 mule_encode (Lstream *encoding, const unsigned char *src,
|
|
259
|
2812 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2813 {
|
|
|
2814 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2815
|
|
|
2816 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2817 {
|
|
|
2818 #ifdef DEBUG_XEMACS
|
|
|
2819 case CODESYS_INTERNAL:
|
|
|
2820 Dynarr_add_many (dst, src, n);
|
|
|
2821 break;
|
|
|
2822 #endif
|
|
|
2823 case CODESYS_AUTODETECT:
|
|
|
2824 /* If we got this far and still haven't decided on the coding
|
|
|
2825 system, then do no conversion. */
|
|
|
2826 case CODESYS_NO_CONVERSION:
|
|
|
2827 encode_coding_no_conversion (encoding, src, dst, n);
|
|
|
2828 break;
|
|
|
2829 #ifdef MULE
|
|
|
2830 case CODESYS_SHIFT_JIS:
|
|
|
2831 encode_coding_sjis (encoding, src, dst, n);
|
|
|
2832 break;
|
|
|
2833 case CODESYS_BIG5:
|
|
|
2834 encode_coding_big5 (encoding, src, dst, n);
|
|
|
2835 break;
|
|
396
|
2836 case CODESYS_UCS4:
|
|
|
2837 encode_coding_ucs4 (encoding, src, dst, n);
|
|
|
2838 break;
|
|
|
2839 case CODESYS_UTF8:
|
|
|
2840 encode_coding_utf8 (encoding, src, dst, n);
|
|
|
2841 break;
|
|
259
|
2842 case CODESYS_CCL:
|
|
398
|
2843 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
|
2844 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_ENCODING);
|
|
259
|
2845 break;
|
|
|
2846 case CODESYS_ISO2022:
|
|
|
2847 encode_coding_iso2022 (encoding, src, dst, n);
|
|
|
2848 break;
|
|
|
2849 #endif /* MULE */
|
|
|
2850 default:
|
|
|
2851 abort ();
|
|
|
2852 }
|
|
|
2853 }
|
|
|
2854
|
|
|
2855 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2856 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2857 This will, for example, convert Japanese characters into stuff such as
|
|
|
2858 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
|
2859 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2860 */
|
|
|
2861 (start, end, coding_system, buffer))
|
|
|
2862 {
|
|
|
2863 Bufpos b, e;
|
|
|
2864 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2865 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2866 Lstream *istr, *ostr;
|
|
|
2867 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2868
|
|
|
2869 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2870
|
|
|
2871 barf_if_buffer_read_only (buf, b, e);
|
|
|
2872
|
|
|
2873 coding_system = Fget_coding_system (coding_system);
|
|
|
2874 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2875 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2876 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2877 Fget_coding_system (Qbinary));
|
|
|
2878 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2879 coding_system);
|
|
|
2880 istr = XLSTREAM (instream);
|
|
|
2881 ostr = XLSTREAM (outstream);
|
|
|
2882 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
|
|
|
2883 /* The chain of streams looks like this:
|
|
|
2884
|
|
|
2885 [BUFFER] <----- send through
|
|
|
2886 ------> [ENCODE AS SPECIFIED]
|
|
|
2887 ------> [DECODE AS BINARY]
|
|
|
2888 ------> [BUFFER]
|
|
|
2889 */
|
|
|
2890 while (1)
|
|
|
2891 {
|
|
|
2892 char tempbuf[1024]; /* some random amount */
|
|
|
2893 Bufpos newpos, even_newer_pos;
|
|
|
2894 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
398
|
2895 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
259
|
2896
|
|
|
2897 if (!size_in_bytes)
|
|
|
2898 break;
|
|
|
2899 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2900 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2901 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2902 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2903 even_newer_pos, 0);
|
|
|
2904 }
|
|
|
2905
|
|
|
2906 {
|
|
|
2907 Charcount retlen =
|
|
|
2908 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2909 Lstream_close (istr);
|
|
|
2910 Lstream_close (ostr);
|
|
|
2911 UNGCPRO;
|
|
|
2912 Lstream_delete (istr);
|
|
|
2913 Lstream_delete (ostr);
|
|
|
2914 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2915 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2916 return make_int (retlen);
|
|
|
2917 }
|
|
|
2918 }
|
|
|
2919
|
|
|
2920 #ifdef MULE
|
|
|
2921
|
|
|
2922 /************************************************************************/
|
|
|
2923 /* Shift-JIS methods */
|
|
|
2924 /************************************************************************/
|
|
|
2925
|
|
|
2926 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
|
2927 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
|
396
|
2928 as is. A character of JISX0201-Kana (DIMENSION1_CHARS94 character set) is
|
|
259
|
2929 encoded by "position-code + 0x80". A character of JISX0208
|
|
396
|
2930 (DIMENSION2_CHARS94 character set) is encoded in 2-byte but two
|
|
259
|
2931 position-codes are divided and shifted so that it fit in the range
|
|
|
2932 below.
|
|
|
2933
|
|
|
2934 --- CODE RANGE of Shift-JIS ---
|
|
|
2935 (character set) (range)
|
|
|
2936 ASCII 0x00 .. 0x7F
|
|
|
2937 JISX0201-Kana 0xA0 .. 0xDF
|
|
|
2938 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
|
2939 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
|
2940 -------------------------------
|
|
|
2941
|
|
|
2942 */
|
|
|
2943
|
|
|
2944 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
|
2945
|
|
|
2946 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
|
|
|
2947 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
|
2948
|
|
|
2949 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2950
|
|
|
2951 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
|
|
|
2952 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
|
2953
|
|
|
2954 #define BYTE_SJIS_KATAKANA_P(c) \
|
|
|
2955 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
|
2956
|
|
|
2957 static int
|
|
398
|
2958 detect_coding_sjis (struct detection_state *st, const unsigned char *src,
|
|
259
|
2959 unsigned int n)
|
|
|
2960 {
|
|
|
2961 int c;
|
|
|
2962
|
|
|
2963 while (n--)
|
|
|
2964 {
|
|
|
2965 c = *src++;
|
|
|
2966 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
2967 return 0;
|
|
|
2968 if (st->shift_jis.in_second_byte)
|
|
|
2969 {
|
|
|
2970 st->shift_jis.in_second_byte = 0;
|
|
|
2971 if (c < 0x40)
|
|
|
2972 return 0;
|
|
|
2973 }
|
|
|
2974 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
|
2975 st->shift_jis.in_second_byte = 1;
|
|
|
2976 }
|
|
|
2977 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
|
2978 }
|
|
|
2979
|
|
|
2980 /* Convert Shift-JIS data to internal format. */
|
|
|
2981
|
|
|
2982 static void
|
|
398
|
2983 decode_coding_sjis (Lstream *decoding, const unsigned char *src,
|
|
259
|
2984 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2985 {
|
|
|
2986 unsigned char c;
|
|
|
2987 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
2988 unsigned int flags = str->flags;
|
|
|
2989 unsigned int ch = str->ch;
|
|
|
2990 eol_type_t eol_type = str->eol_type;
|
|
259
|
2991
|
|
|
2992 while (n--)
|
|
|
2993 {
|
|
|
2994 c = *src++;
|
|
|
2995
|
|
|
2996 if (ch)
|
|
|
2997 {
|
|
|
2998 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
|
2999 if (BYTE_SJIS_TWO_BYTE_2_P (c))
|
|
|
3000 {
|
|
|
3001 unsigned char e1, e2;
|
|
|
3002
|
|
|
3003 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
3004 DECODE_SJIS (ch, c, e1, e2);
|
|
|
3005 Dynarr_add (dst, e1);
|
|
|
3006 Dynarr_add (dst, e2);
|
|
|
3007 }
|
|
|
3008 else
|
|
|
3009 {
|
|
|
3010 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
3011 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3012 }
|
|
|
3013 ch = 0;
|
|
|
3014 }
|
|
|
3015 else
|
|
|
3016 {
|
|
|
3017 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3018 if (BYTE_SJIS_TWO_BYTE_1_P (c))
|
|
|
3019 ch = c;
|
|
|
3020 else if (BYTE_SJIS_KATAKANA_P (c))
|
|
|
3021 {
|
|
|
3022 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
|
|
|
3023 Dynarr_add (dst, c);
|
|
|
3024 }
|
|
|
3025 else
|
|
|
3026 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3027 }
|
|
|
3028 label_continue_loop:;
|
|
|
3029 }
|
|
|
3030
|
|
|
3031 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
3032
|
|
396
|
3033 str->flags = flags;
|
|
|
3034 str->ch = ch;
|
|
259
|
3035 }
|
|
|
3036
|
|
|
3037 /* Convert internally-formatted data to Shift-JIS. */
|
|
|
3038
|
|
|
3039 static void
|
|
398
|
3040 encode_coding_sjis (Lstream *encoding, const unsigned char *src,
|
|
259
|
3041 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3042 {
|
|
|
3043 unsigned char c;
|
|
|
3044 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
3045 unsigned int flags = str->flags;
|
|
|
3046 unsigned int ch = str->ch;
|
|
|
3047 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
3048
|
|
|
3049 while (n--)
|
|
|
3050 {
|
|
|
3051 c = *src++;
|
|
|
3052 if (c == '\n')
|
|
|
3053 {
|
|
|
3054 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3055 Dynarr_add (dst, '\r');
|
|
|
3056 if (eol_type != EOL_CR)
|
|
|
3057 Dynarr_add (dst, '\n');
|
|
|
3058 ch = 0;
|
|
|
3059 }
|
|
|
3060 else if (BYTE_ASCII_P (c))
|
|
|
3061 {
|
|
|
3062 Dynarr_add (dst, c);
|
|
|
3063 ch = 0;
|
|
|
3064 }
|
|
|
3065 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
3066 ch = (c == LEADING_BYTE_KATAKANA_JISX0201 ||
|
|
|
3067 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
3068 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
|
3069 else if (ch)
|
|
|
3070 {
|
|
|
3071 if (ch == LEADING_BYTE_KATAKANA_JISX0201)
|
|
|
3072 {
|
|
|
3073 Dynarr_add (dst, c);
|
|
|
3074 ch = 0;
|
|
|
3075 }
|
|
|
3076 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
3077 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
|
3078 ch = c;
|
|
|
3079 else
|
|
|
3080 {
|
|
|
3081 unsigned char j1, j2;
|
|
|
3082 ENCODE_SJIS (ch, c, j1, j2);
|
|
|
3083 Dynarr_add (dst, j1);
|
|
|
3084 Dynarr_add (dst, j2);
|
|
|
3085 ch = 0;
|
|
|
3086 }
|
|
|
3087 }
|
|
|
3088 }
|
|
|
3089
|
|
396
|
3090 str->flags = flags;
|
|
|
3091 str->ch = ch;
|
|
259
|
3092 }
|
|
|
3093
|
|
|
3094 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
|
3095 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
|
3096 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
|
3097 Return the corresponding character.
|
|
|
3098 */
|
|
|
3099 (code))
|
|
|
3100 {
|
|
|
3101 unsigned char c1, c2, s1, s2;
|
|
|
3102
|
|
|
3103 CHECK_CONS (code);
|
|
|
3104 CHECK_INT (XCAR (code));
|
|
|
3105 CHECK_INT (XCDR (code));
|
|
|
3106 s1 = XINT (XCAR (code));
|
|
|
3107 s2 = XINT (XCDR (code));
|
|
|
3108 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
|
|
|
3109 BYTE_SJIS_TWO_BYTE_2_P (s2))
|
|
|
3110 {
|
|
|
3111 DECODE_SJIS (s1, s2, c1, c2);
|
|
|
3112 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
|
3113 c1 & 0x7F, c2 & 0x7F));
|
|
|
3114 }
|
|
|
3115 else
|
|
|
3116 return Qnil;
|
|
|
3117 }
|
|
|
3118
|
|
|
3119 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
|
3120 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
|
3121 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
|
3122 */
|
|
|
3123 (ch))
|
|
|
3124 {
|
|
|
3125 Lisp_Object charset;
|
|
|
3126 int c1, c2, s1, s2;
|
|
|
3127
|
|
|
3128 CHECK_CHAR_COERCE_INT (ch);
|
|
|
3129 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
3130 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
|
3131 {
|
|
|
3132 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
|
3133 return Fcons (make_int (s1), make_int (s2));
|
|
|
3134 }
|
|
|
3135 else
|
|
|
3136 return Qnil;
|
|
|
3137 }
|
|
|
3138
|
|
|
3139
|
|
|
3140 /************************************************************************/
|
|
|
3141 /* Big5 methods */
|
|
|
3142 /************************************************************************/
|
|
|
3143
|
|
|
3144 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
|
3145 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
|
3146 character set and is encoded in two-byte.
|
|
|
3147
|
|
|
3148 --- CODE RANGE of BIG5 ---
|
|
|
3149 (character set) (range)
|
|
|
3150 ASCII 0x00 .. 0x7F
|
|
|
3151 Big5 (1st byte) 0xA1 .. 0xFE
|
|
|
3152 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
|
3153 --------------------------
|
|
|
3154
|
|
|
3155 Since the number of characters in Big5 is larger than maximum
|
|
|
3156 characters in Emacs' charset (96x96), it can't be handled as one
|
|
380
|
3157 charset. So, in Emacs, Big5 is divided into two: `charset-big5-1'
|
|
396
|
3158 and `charset-big5-2'. Both <type>s are DIMENSION2_CHARS94. The former
|
|
259
|
3159 contains frequently used characters and the latter contains less
|
|
|
3160 frequently used characters. */
|
|
|
3161
|
|
|
3162 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
|
3163 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
|
3164
|
|
|
3165 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
3166
|
|
|
3167 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
|
3168 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
|
3169
|
|
|
3170 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
|
3171
|
|
|
3172 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
|
3173
|
|
|
3174 /* Code conversion macros. These are macros because they are used in
|
|
|
3175 inner loops during code conversion.
|
|
|
3176
|
|
|
3177 Note that temporary variables in macros introduce the classic
|
|
|
3178 dynamic-scoping problems with variable names. We use capital-
|
|
|
3179 lettered variables in the assumption that XEmacs does not use
|
|
|
3180 capital letters in variables except in a very formalized way
|
|
|
3181 (e.g. Qstring). */
|
|
|
3182
|
|
|
3183 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
|
3184 (lb, c1, c2). */
|
|
|
3185
|
|
|
3186 /* There is a much simpler way to split the Big5 charset into two.
|
|
|
3187 For the moment I'm going to leave the algorithm as-is because it
|
|
|
3188 claims to separate out the most-used characters into a single
|
|
|
3189 charset, which perhaps will lead to optimizations in various
|
|
|
3190 places.
|
|
|
3191
|
|
|
3192 The way the algorithm works is something like this:
|
|
|
3193
|
|
|
3194 Big5 can be viewed as a 94x157 charset, where the row is
|
|
|
3195 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
|
3196 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
|
3197 the split between low and high column numbers is apparently
|
|
|
3198 meaningless; ascending rows produce less and less frequent chars.
|
|
|
3199 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
|
3200 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
|
3201 second. To do the conversion, we convert the character into
|
|
|
3202 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
|
3203 is the second, etc. That way, the characters are ordered by
|
|
|
3204 decreasing frequency. Then we just chop the space in two
|
|
|
3205 and coerce the result into a 94x94 space.
|
|
|
3206 */
|
|
|
3207
|
|
|
3208 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
|
3209 { \
|
|
|
3210 int B1 = b1, B2 = b2; \
|
|
|
3211 unsigned int I \
|
|
|
3212 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
|
3213 \
|
|
|
3214 if (B1 < 0xC9) \
|
|
|
3215 { \
|
|
|
3216 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
|
3217 } \
|
|
|
3218 else \
|
|
|
3219 { \
|
|
|
3220 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
|
3221 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
|
3222 } \
|
|
|
3223 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
|
3224 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
|
3225 } while (0)
|
|
|
3226
|
|
|
3227 /* Convert the internal string representation of a Big5 character
|
|
|
3228 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
|
3229
|
|
|
3230 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
|
3231 { \
|
|
|
3232 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
|
3233 \
|
|
|
3234 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
|
3235 { \
|
|
|
3236 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
|
3237 } \
|
|
|
3238 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
|
3239 b2 = I % BIG5_SAME_ROW; \
|
|
|
3240 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
|
3241 } while (0)
|
|
|
3242
|
|
|
3243 static int
|
|
398
|
3244 detect_coding_big5 (struct detection_state *st, const unsigned char *src,
|
|
259
|
3245 unsigned int n)
|
|
|
3246 {
|
|
|
3247 int c;
|
|
|
3248
|
|
|
3249 while (n--)
|
|
|
3250 {
|
|
|
3251 c = *src++;
|
|
|
3252 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
|
3253 (c >= 0x80 && c <= 0xA0))
|
|
|
3254 return 0;
|
|
|
3255 if (st->big5.in_second_byte)
|
|
|
3256 {
|
|
|
3257 st->big5.in_second_byte = 0;
|
|
|
3258 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
|
3259 return 0;
|
|
|
3260 }
|
|
|
3261 else if (c >= 0xA1)
|
|
|
3262 st->big5.in_second_byte = 1;
|
|
|
3263 }
|
|
|
3264 return CODING_CATEGORY_BIG5_MASK;
|
|
|
3265 }
|
|
|
3266
|
|
|
3267 /* Convert Big5 data to internal format. */
|
|
|
3268
|
|
|
3269 static void
|
|
398
|
3270 decode_coding_big5 (Lstream *decoding, const unsigned char *src,
|
|
259
|
3271 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3272 {
|
|
|
3273 unsigned char c;
|
|
|
3274 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
3275 unsigned int flags = str->flags;
|
|
|
3276 unsigned int ch = str->ch;
|
|
|
3277 eol_type_t eol_type = str->eol_type;
|
|
259
|
3278
|
|
|
3279 while (n--)
|
|
|
3280 {
|
|
|
3281 c = *src++;
|
|
|
3282 if (ch)
|
|
|
3283 {
|
|
|
3284 /* Previous character was first byte of Big5 char. */
|
|
|
3285 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
|
3286 {
|
|
|
3287 unsigned char b1, b2, b3;
|
|
|
3288 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
|
3289 Dynarr_add (dst, b1);
|
|
|
3290 Dynarr_add (dst, b2);
|
|
|
3291 Dynarr_add (dst, b3);
|
|
|
3292 }
|
|
|
3293 else
|
|
|
3294 {
|
|
|
3295 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
3296 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3297 }
|
|
|
3298 ch = 0;
|
|
|
3299 }
|
|
|
3300 else
|
|
|
3301 {
|
|
|
3302 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3303 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
|
3304 ch = c;
|
|
|
3305 else
|
|
|
3306 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3307 }
|
|
|
3308 label_continue_loop:;
|
|
|
3309 }
|
|
|
3310
|
|
|
3311 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
3312
|
|
396
|
3313 str->flags = flags;
|
|
|
3314 str->ch = ch;
|
|
259
|
3315 }
|
|
|
3316
|
|
|
3317 /* Convert internally-formatted data to Big5. */
|
|
|
3318
|
|
|
3319 static void
|
|
398
|
3320 encode_coding_big5 (Lstream *encoding, const unsigned char *src,
|
|
259
|
3321 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3322 {
|
|
|
3323 unsigned char c;
|
|
|
3324 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
3325 unsigned int flags = str->flags;
|
|
|
3326 unsigned int ch = str->ch;
|
|
|
3327 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
3328
|
|
|
3329 while (n--)
|
|
|
3330 {
|
|
|
3331 c = *src++;
|
|
|
3332 if (c == '\n')
|
|
|
3333 {
|
|
|
3334 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3335 Dynarr_add (dst, '\r');
|
|
|
3336 if (eol_type != EOL_CR)
|
|
|
3337 Dynarr_add (dst, '\n');
|
|
|
3338 }
|
|
|
3339 else if (BYTE_ASCII_P (c))
|
|
|
3340 {
|
|
|
3341 /* ASCII. */
|
|
|
3342 Dynarr_add (dst, c);
|
|
|
3343 }
|
|
|
3344 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
3345 {
|
|
|
3346 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3347 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3348 {
|
|
|
3349 /* A recognized leading byte. */
|
|
|
3350 ch = c;
|
|
|
3351 continue; /* not done with this character. */
|
|
|
3352 }
|
|
|
3353 /* otherwise just ignore this character. */
|
|
|
3354 }
|
|
|
3355 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3356 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3357 {
|
|
|
3358 /* Previous char was a recognized leading byte. */
|
|
|
3359 ch = (ch << 8) | c;
|
|
|
3360 continue; /* not done with this character. */
|
|
|
3361 }
|
|
|
3362 else if (ch)
|
|
|
3363 {
|
|
|
3364 /* Encountering second byte of a Big5 character. */
|
|
|
3365 unsigned char b1, b2;
|
|
|
3366
|
|
|
3367 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
|
3368 Dynarr_add (dst, b1);
|
|
|
3369 Dynarr_add (dst, b2);
|
|
|
3370 }
|
|
|
3371
|
|
|
3372 ch = 0;
|
|
|
3373 }
|
|
|
3374
|
|
396
|
3375 str->flags = flags;
|
|
|
3376 str->ch = ch;
|
|
259
|
3377 }
|
|
|
3378
|
|
|
3379
|
|
|
3380 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
|
3381 Decode a Big5 character CODE of BIG5 coding-system.
|
|
|
3382 CODE is the character code in BIG5, a cons of two integers.
|
|
|
3383 Return the corresponding character.
|
|
|
3384 */
|
|
|
3385 (code))
|
|
|
3386 {
|
|
|
3387 unsigned char c1, c2, b1, b2;
|
|
|
3388
|
|
|
3389 CHECK_CONS (code);
|
|
|
3390 CHECK_INT (XCAR (code));
|
|
|
3391 CHECK_INT (XCDR (code));
|
|
|
3392 b1 = XINT (XCAR (code));
|
|
|
3393 b2 = XINT (XCDR (code));
|
|
|
3394 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
|
3395 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
|
3396 {
|
|
|
3397 int leading_byte;
|
|
|
3398 Lisp_Object charset;
|
|
|
3399 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
|
|
|
3400 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
|
|
|
3401 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
|
3402 }
|
|
|
3403 else
|
|
|
3404 return Qnil;
|
|
|
3405 }
|
|
|
3406
|
|
|
3407 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
|
3408 Encode the Big5 character CH to BIG5 coding-system.
|
|
|
3409 Return the corresponding character code in Big5.
|
|
|
3410 */
|
|
|
3411 (ch))
|
|
|
3412 {
|
|
|
3413 Lisp_Object charset;
|
|
|
3414 int c1, c2, b1, b2;
|
|
|
3415
|
|
|
3416 CHECK_CHAR_COERCE_INT (ch);
|
|
|
3417 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
3418 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
|
3419 EQ (charset, Vcharset_chinese_big5_2))
|
|
|
3420 {
|
|
|
3421 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
|
3422 b1, b2);
|
|
|
3423 return Fcons (make_int (b1), make_int (b2));
|
|
|
3424 }
|
|
|
3425 else
|
|
|
3426 return Qnil;
|
|
|
3427 }
|
|
|
3428
|
|
|
3429
|
|
|
3430 /************************************************************************/
|
|
396
|
3431 /* UCS-4 methods */
|
|
|
3432 /* */
|
|
|
3433 /* UCS-4 character codes are implemented as nonnegative integers. */
|
|
|
3434 /* */
|
|
|
3435 /************************************************************************/
|
|
|
3436
|
|
|
3437
|
|
|
3438 DEFUN ("set-ucs-char", Fset_ucs_char, 2, 2, 0, /*
|
|
|
3439 Map UCS-4 code CODE to Mule character CHARACTER.
|
|
|
3440
|
|
|
3441 Return T on success, NIL on failure.
|
|
|
3442 */
|
|
|
3443 (code, character))
|
|
|
3444 {
|
|
|
3445 unsigned int c;
|
|
|
3446
|
|
|
3447 CHECK_CHAR (character);
|
|
|
3448 CHECK_INT (code);
|
|
|
3449 c = XINT (code);
|
|
|
3450
|
|
398
|
3451 if (c < sizeof (fcd->ucs_to_mule_table))
|
|
396
|
3452 {
|
|
398
|
3453 fcd->ucs_to_mule_table[c] = character;
|
|
396
|
3454 return Qt;
|
|
|
3455 }
|
|
|
3456 else
|
|
|
3457 return Qnil;
|
|
|
3458 }
|
|
|
3459
|
|
|
3460 static Lisp_Object
|
|
|
3461 ucs_to_char (unsigned long code)
|
|
|
3462 {
|
|
398
|
3463 if (code < sizeof (fcd->ucs_to_mule_table))
|
|
396
|
3464 {
|
|
398
|
3465 return fcd->ucs_to_mule_table[code];
|
|
396
|
3466 }
|
|
|
3467 else if ((0xe00000 <= code) && (code <= 0xe00000 + 94 * 94 * 14))
|
|
|
3468 {
|
|
|
3469 unsigned int c;
|
|
|
3470
|
|
|
3471 code -= 0xe00000;
|
|
|
3472 c = code % (94 * 94);
|
|
|
3473 return make_char
|
|
|
3474 (MAKE_CHAR (CHARSET_BY_ATTRIBUTES
|
|
|
3475 (CHARSET_TYPE_94X94, code / (94 * 94) + '@',
|
|
|
3476 CHARSET_LEFT_TO_RIGHT),
|
|
|
3477 c / 94 + 33, c % 94 + 33));
|
|
|
3478 }
|
|
|
3479 else
|
|
|
3480 return Qnil;
|
|
|
3481 }
|
|
|
3482
|
|
|
3483 DEFUN ("ucs-char", Fucs_char, 1, 1, 0, /*
|
|
|
3484 Return Mule character corresponding to UCS code CODE (a positive integer).
|
|
|
3485 */
|
|
|
3486 (code))
|
|
|
3487 {
|
|
|
3488 CHECK_NATNUM (code);
|
|
|
3489 return ucs_to_char (XINT (code));
|
|
|
3490 }
|
|
|
3491
|
|
|
3492 DEFUN ("set-char-ucs", Fset_char_ucs, 2, 2, 0, /*
|
|
|
3493 Map Mule character CHARACTER to UCS code CODE (a positive integer).
|
|
|
3494 */
|
|
|
3495 (character, code))
|
|
|
3496 {
|
|
|
3497 /* #### Isn't this gilding the lily? Fput_char_table checks its args.
|
|
|
3498 Fset_char_ucs is more restrictive on index arg, but should
|
|
|
3499 check code arg in a char_table method. */
|
|
|
3500 CHECK_CHAR (character);
|
|
|
3501 CHECK_NATNUM (code);
|
|
|
3502 return Fput_char_table (character, code, mule_to_ucs_table);
|
|
|
3503 }
|
|
|
3504
|
|
|
3505 DEFUN ("char-ucs", Fchar_ucs, 1, 1, 0, /*
|
|
|
3506 Return the UCS code (a positive integer) corresponding to CHARACTER.
|
|
|
3507 */
|
|
|
3508 (character))
|
|
|
3509 {
|
|
|
3510 return Fget_char_table (character, mule_to_ucs_table);
|
|
|
3511 }
|
|
|
3512
|
|
|
3513 /* Decode a UCS-4 character into a buffer. If the lookup fails, use
|
|
398
|
3514 <GETA MARK> (U+3013) of JIS X 0208, which means correct character
|
|
|
3515 is not found, instead.
|
|
396
|
3516 #### do something more appropriate (use blob?)
|
|
|
3517 Danger, Will Robinson! Data loss. Should we signal user? */
|
|
|
3518 static void
|
|
|
3519 decode_ucs4 (unsigned long ch, unsigned_char_dynarr *dst)
|
|
|
3520 {
|
|
|
3521 Lisp_Object chr = ucs_to_char (ch);
|
|
|
3522
|
|
|
3523 if (! NILP (chr))
|
|
|
3524 {
|
|
|
3525 Bufbyte work[MAX_EMCHAR_LEN];
|
|
|
3526 int len;
|
|
|
3527
|
|
|
3528 ch = XCHAR (chr);
|
|
|
3529 len = (ch < 128) ?
|
|
|
3530 simple_set_charptr_emchar (work, ch) :
|
|
|
3531 non_ascii_set_charptr_emchar (work, ch);
|
|
|
3532 Dynarr_add_many (dst, work, len);
|
|
|
3533 }
|
|
|
3534 else
|
|
|
3535 {
|
|
|
3536 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
3537 Dynarr_add (dst, 34 + 128);
|
|
|
3538 Dynarr_add (dst, 46 + 128);
|
|
|
3539 }
|
|
|
3540 }
|
|
|
3541
|
|
|
3542 static unsigned long
|
|
|
3543 mule_char_to_ucs4 (Lisp_Object charset,
|
|
|
3544 unsigned char h, unsigned char l)
|
|
|
3545 {
|
|
|
3546 Lisp_Object code
|
|
|
3547 = Fget_char_table (make_char (MAKE_CHAR (charset, h & 127, l & 127)),
|
|
|
3548 mule_to_ucs_table);
|
|
|
3549
|
|
|
3550 if (INTP (code))
|
|
|
3551 {
|
|
|
3552 return XINT (code);
|
|
|
3553 }
|
|
|
3554 else if ( (XCHARSET_DIMENSION (charset) == 2) &&
|
|
|
3555 (XCHARSET_CHARS (charset) == 94) )
|
|
|
3556 {
|
|
|
3557 unsigned char final = XCHARSET_FINAL (charset);
|
|
|
3558
|
|
|
3559 if ( ('@' <= final) && (final < 0x7f) )
|
|
|
3560 {
|
|
|
3561 return 0xe00000 + (final - '@') * 94 * 94
|
|
|
3562 + ((h & 127) - 33) * 94 + (l & 127) - 33;
|
|
|
3563 }
|
|
|
3564 else
|
|
|
3565 {
|
|
|
3566 return '?';
|
|
|
3567 }
|
|
|
3568 }
|
|
|
3569 else
|
|
|
3570 {
|
|
|
3571 return '?';
|
|
|
3572 }
|
|
|
3573 }
|
|
|
3574
|
|
|
3575 static void
|
|
|
3576 encode_ucs4 (Lisp_Object charset,
|
|
|
3577 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3578 {
|
|
|
3579 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3580 Dynarr_add (dst, code >> 24);
|
|
|
3581 Dynarr_add (dst, (code >> 16) & 255);
|
|
|
3582 Dynarr_add (dst, (code >> 8) & 255);
|
|
|
3583 Dynarr_add (dst, code & 255);
|
|
|
3584 }
|
|
|
3585
|
|
|
3586 static int
|
|
398
|
3587 detect_coding_ucs4 (struct detection_state *st, const unsigned char *src,
|
|
396
|
3588 unsigned int n)
|
|
|
3589 {
|
|
|
3590 while (n--)
|
|
|
3591 {
|
|
|
3592 int c = *src++;
|
|
|
3593 switch (st->ucs4.in_byte)
|
|
|
3594 {
|
|
|
3595 case 0:
|
|
|
3596 if (c >= 128)
|
|
|
3597 return 0;
|
|
|
3598 else
|
|
|
3599 st->ucs4.in_byte++;
|
|
|
3600 break;
|
|
|
3601 case 3:
|
|
|
3602 st->ucs4.in_byte = 0;
|
|
|
3603 break;
|
|
|
3604 default:
|
|
|
3605 st->ucs4.in_byte++;
|
|
|
3606 }
|
|
|
3607 }
|
|
|
3608 return CODING_CATEGORY_UCS4_MASK;
|
|
|
3609 }
|
|
|
3610
|
|
|
3611 static void
|
|
398
|
3612 decode_coding_ucs4 (Lstream *decoding, const unsigned char *src,
|
|
396
|
3613 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3614 {
|
|
|
3615 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3616 unsigned int flags = str->flags;
|
|
|
3617 unsigned int ch = str->ch;
|
|
398
|
3618 unsigned char counter = str->counter;
|
|
396
|
3619
|
|
|
3620 while (n--)
|
|
|
3621 {
|
|
|
3622 unsigned char c = *src++;
|
|
398
|
3623 switch (counter)
|
|
396
|
3624 {
|
|
|
3625 case 0:
|
|
|
3626 ch = c;
|
|
398
|
3627 counter = 3;
|
|
396
|
3628 break;
|
|
|
3629 case 1:
|
|
|
3630 decode_ucs4 ( ( ch << 8 ) | c, dst);
|
|
|
3631 ch = 0;
|
|
398
|
3632 counter = 0;
|
|
396
|
3633 break;
|
|
|
3634 default:
|
|
|
3635 ch = ( ch << 8 ) | c;
|
|
398
|
3636 counter--;
|
|
396
|
3637 }
|
|
|
3638 }
|
|
398
|
3639 if (counter & CODING_STATE_END)
|
|
396
|
3640 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3641
|
|
|
3642 str->flags = flags;
|
|
|
3643 str->ch = ch;
|
|
398
|
3644 str->counter = counter;
|
|
396
|
3645 }
|
|
|
3646
|
|
|
3647 static void
|
|
398
|
3648 encode_coding_ucs4 (Lstream *encoding, const unsigned char *src,
|
|
396
|
3649 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3650 {
|
|
|
3651 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3652 unsigned int flags = str->flags;
|
|
|
3653 unsigned int ch = str->ch;
|
|
|
3654 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3655 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3656
|
|
|
3657 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3658 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3659 on the source while we're outputting the composite char. */
|
|
|
3660 unsigned int saved_n = 0;
|
|
398
|
3661 const unsigned char *saved_src = NULL;
|
|
396
|
3662 int in_composite = 0;
|
|
|
3663
|
|
|
3664 back_to_square_n:
|
|
|
3665 #endif
|
|
|
3666
|
|
|
3667 while (n--)
|
|
|
3668 {
|
|
|
3669 unsigned char c = *src++;
|
|
|
3670
|
|
|
3671 if (BYTE_ASCII_P (c))
|
|
|
3672 { /* Processing ASCII character */
|
|
|
3673 ch = 0;
|
|
|
3674 encode_ucs4 (Vcharset_ascii, c, 0, dst);
|
|
|
3675 char_boundary = 1;
|
|
|
3676 }
|
|
|
3677 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3678 { /* Processing Leading Byte */
|
|
|
3679 ch = 0;
|
|
|
3680 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3681 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3682 ch = c;
|
|
|
3683 char_boundary = 0;
|
|
|
3684 }
|
|
|
3685 else
|
|
|
3686 { /* Processing Non-ASCII character */
|
|
|
3687 char_boundary = 1;
|
|
|
3688 if (EQ (charset, Vcharset_control_1))
|
|
|
3689 {
|
|
|
3690 encode_ucs4 (Vcharset_control_1, c, 0, dst);
|
|
|
3691 }
|
|
|
3692 else
|
|
|
3693 {
|
|
|
3694 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3695 {
|
|
|
3696 case 2:
|
|
|
3697 encode_ucs4 (charset, c, 0, dst);
|
|
|
3698 break;
|
|
|
3699 case 3:
|
|
|
3700 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3701 {
|
|
|
3702 encode_ucs4 (charset, c, 0, dst);
|
|
|
3703 ch = 0;
|
|
|
3704 }
|
|
|
3705 else if (ch)
|
|
|
3706 {
|
|
|
3707 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3708 if (EQ (charset, Vcharset_composite))
|
|
|
3709 {
|
|
|
3710 if (in_composite)
|
|
|
3711 {
|
|
|
3712 /* #### Bother! We don't know how to
|
|
|
3713 handle this yet. */
|
|
|
3714 Dynarr_add (dst, 0);
|
|
|
3715 Dynarr_add (dst, 0);
|
|
|
3716 Dynarr_add (dst, 0);
|
|
|
3717 Dynarr_add (dst, '~');
|
|
|
3718 }
|
|
|
3719 else
|
|
|
3720 {
|
|
|
3721 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
3722 ch & 0x7F, c & 0x7F);
|
|
|
3723 Lisp_Object lstr = composite_char_string (emch);
|
|
|
3724 saved_n = n;
|
|
|
3725 saved_src = src;
|
|
|
3726 in_composite = 1;
|
|
|
3727 src = XSTRING_DATA (lstr);
|
|
|
3728 n = XSTRING_LENGTH (lstr);
|
|
|
3729 }
|
|
|
3730 }
|
|
|
3731 else
|
|
|
3732 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3733 {
|
|
|
3734 encode_ucs4(charset, ch, c, dst);
|
|
|
3735 }
|
|
|
3736 ch = 0;
|
|
|
3737 }
|
|
|
3738 else
|
|
|
3739 {
|
|
|
3740 ch = c;
|
|
|
3741 char_boundary = 0;
|
|
|
3742 }
|
|
|
3743 break;
|
|
|
3744 case 4:
|
|
|
3745 if (ch)
|
|
|
3746 {
|
|
|
3747 encode_ucs4 (charset, ch, c, dst);
|
|
|
3748 ch = 0;
|
|
|
3749 }
|
|
|
3750 else
|
|
|
3751 {
|
|
|
3752 ch = c;
|
|
|
3753 char_boundary = 0;
|
|
|
3754 }
|
|
|
3755 break;
|
|
|
3756 default:
|
|
|
3757 abort ();
|
|
|
3758 }
|
|
|
3759 }
|
|
|
3760 }
|
|
|
3761 }
|
|
|
3762
|
|
|
3763 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3764 if (in_composite)
|
|
|
3765 {
|
|
|
3766 n = saved_n;
|
|
|
3767 src = saved_src;
|
|
|
3768 in_composite = 0;
|
|
|
3769 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
3770 }
|
|
|
3771 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3772
|
|
|
3773 str->flags = flags;
|
|
|
3774 str->ch = ch;
|
|
|
3775 str->iso2022.current_char_boundary = char_boundary;
|
|
|
3776 str->iso2022.current_charset = charset;
|
|
|
3777
|
|
|
3778 /* Verbum caro factum est! */
|
|
|
3779 }
|
|
|
3780
|
|
|
3781
|
|
|
3782 /************************************************************************/
|
|
|
3783 /* UTF-8 methods */
|
|
|
3784 /************************************************************************/
|
|
|
3785
|
|
|
3786 static int
|
|
398
|
3787 detect_coding_utf8 (struct detection_state *st, const unsigned char *src,
|
|
396
|
3788 unsigned int n)
|
|
|
3789 {
|
|
|
3790 while (n--)
|
|
|
3791 {
|
|
|
3792 unsigned char c = *src++;
|
|
|
3793 switch (st->utf8.in_byte)
|
|
|
3794 {
|
|
|
3795 case 0:
|
|
|
3796 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
3797 return 0;
|
|
|
3798 else if (c >= 0xfc)
|
|
|
3799 st->utf8.in_byte = 5;
|
|
|
3800 else if (c >= 0xf8)
|
|
|
3801 st->utf8.in_byte = 4;
|
|
|
3802 else if (c >= 0xf0)
|
|
|
3803 st->utf8.in_byte = 3;
|
|
|
3804 else if (c >= 0xe0)
|
|
|
3805 st->utf8.in_byte = 2;
|
|
|
3806 else if (c >= 0xc0)
|
|
|
3807 st->utf8.in_byte = 1;
|
|
|
3808 else if (c >= 0x80)
|
|
|
3809 return 0;
|
|
|
3810 break;
|
|
|
3811 default:
|
|
|
3812 if ((c & 0xc0) != 0x80)
|
|
|
3813 return 0;
|
|
|
3814 else
|
|
|
3815 st->utf8.in_byte--;
|
|
|
3816 }
|
|
|
3817 }
|
|
|
3818 return CODING_CATEGORY_UTF8_MASK;
|
|
|
3819 }
|
|
|
3820
|
|
|
3821 static void
|
|
398
|
3822 decode_coding_utf8 (Lstream *decoding, const unsigned char *src,
|
|
396
|
3823 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3824 {
|
|
|
3825 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3826 unsigned int flags = str->flags;
|
|
|
3827 unsigned int ch = str->ch;
|
|
|
3828 eol_type_t eol_type = str->eol_type;
|
|
398
|
3829 unsigned char counter = str->counter;
|
|
396
|
3830
|
|
|
3831 while (n--)
|
|
|
3832 {
|
|
|
3833 unsigned char c = *src++;
|
|
398
|
3834 switch (counter)
|
|
396
|
3835 {
|
|
|
3836 case 0:
|
|
|
3837 if ( c >= 0xfc )
|
|
|
3838 {
|
|
|
3839 ch = c & 0x01;
|
|
398
|
3840 counter = 5;
|
|
396
|
3841 }
|
|
|
3842 else if ( c >= 0xf8 )
|
|
|
3843 {
|
|
|
3844 ch = c & 0x03;
|
|
398
|
3845 counter = 4;
|
|
396
|
3846 }
|
|
|
3847 else if ( c >= 0xf0 )
|
|
|
3848 {
|
|
|
3849 ch = c & 0x07;
|
|
398
|
3850 counter = 3;
|
|
396
|
3851 }
|
|
|
3852 else if ( c >= 0xe0 )
|
|
|
3853 {
|
|
|
3854 ch = c & 0x0f;
|
|
398
|
3855 counter = 2;
|
|
396
|
3856 }
|
|
|
3857 else if ( c >= 0xc0 )
|
|
|
3858 {
|
|
|
3859 ch = c & 0x1f;
|
|
398
|
3860 counter = 1;
|
|
396
|
3861 }
|
|
|
3862 else
|
|
|
3863 {
|
|
|
3864 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3865 decode_ucs4 (c, dst);
|
|
|
3866 }
|
|
|
3867 break;
|
|
|
3868 case 1:
|
|
|
3869 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
|
3870 decode_ucs4 (ch, dst);
|
|
|
3871 ch = 0;
|
|
398
|
3872 counter = 0;
|
|
396
|
3873 break;
|
|
|
3874 default:
|
|
|
3875 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
398
|
3876 counter--;
|
|
396
|
3877 }
|
|
|
3878 label_continue_loop:;
|
|
|
3879 }
|
|
|
3880
|
|
|
3881 if (flags & CODING_STATE_END)
|
|
|
3882 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3883
|
|
|
3884 str->flags = flags;
|
|
|
3885 str->ch = ch;
|
|
398
|
3886 str->counter = counter;
|
|
396
|
3887 }
|
|
|
3888
|
|
|
3889 static void
|
|
|
3890 encode_utf8 (Lisp_Object charset,
|
|
|
3891 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3892 {
|
|
|
3893 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3894 if ( code <= 0x7f )
|
|
|
3895 {
|
|
|
3896 Dynarr_add (dst, code);
|
|
|
3897 }
|
|
|
3898 else if ( code <= 0x7ff )
|
|
|
3899 {
|
|
|
3900 Dynarr_add (dst, (code >> 6) | 0xc0);
|
|
|
3901 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3902 }
|
|
|
3903 else if ( code <= 0xffff )
|
|
|
3904 {
|
|
|
3905 Dynarr_add (dst, (code >> 12) | 0xe0);
|
|
|
3906 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3907 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3908 }
|
|
|
3909 else if ( code <= 0x1fffff )
|
|
|
3910 {
|
|
|
3911 Dynarr_add (dst, (code >> 18) | 0xf0);
|
|
|
3912 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3913 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3914 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3915 }
|
|
|
3916 else if ( code <= 0x3ffffff )
|
|
|
3917 {
|
|
|
3918 Dynarr_add (dst, (code >> 24) | 0xf8);
|
|
|
3919 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3920 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3921 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3922 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3923 }
|
|
|
3924 else
|
|
|
3925 {
|
|
|
3926 Dynarr_add (dst, (code >> 30) | 0xfc);
|
|
|
3927 Dynarr_add (dst, ((code >> 24) & 0x3f) | 0x80);
|
|
|
3928 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3929 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3930 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3931 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3932 }
|
|
|
3933 }
|
|
|
3934
|
|
|
3935 static void
|
|
398
|
3936 encode_coding_utf8 (Lstream *encoding, const unsigned char *src,
|
|
396
|
3937 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3938 {
|
|
|
3939 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3940 unsigned int flags = str->flags;
|
|
|
3941 unsigned int ch = str->ch;
|
|
|
3942 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3943 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3944 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3945
|
|
|
3946 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3947 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3948 on the source while we're outputting the composite char. */
|
|
|
3949 unsigned int saved_n = 0;
|
|
398
|
3950 const unsigned char *saved_src = NULL;
|
|
396
|
3951 int in_composite = 0;
|
|
|
3952
|
|
|
3953 back_to_square_n:
|
|
|
3954 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
398
|
3955
|
|
396
|
3956 while (n--)
|
|
|
3957 {
|
|
|
3958 unsigned char c = *src++;
|
|
|
3959
|
|
|
3960 if (BYTE_ASCII_P (c))
|
|
|
3961 { /* Processing ASCII character */
|
|
|
3962 ch = 0;
|
|
|
3963 if (c == '\n')
|
|
|
3964 {
|
|
|
3965 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3966 Dynarr_add (dst, '\r');
|
|
|
3967 if (eol_type != EOL_CR)
|
|
|
3968 Dynarr_add (dst, c);
|
|
|
3969 }
|
|
|
3970 else
|
|
|
3971 encode_utf8 (Vcharset_ascii, c, 0, dst);
|
|
|
3972 char_boundary = 1;
|
|
|
3973 }
|
|
|
3974 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3975 { /* Processing Leading Byte */
|
|
|
3976 ch = 0;
|
|
|
3977 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3978 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3979 ch = c;
|
|
|
3980 char_boundary = 0;
|
|
|
3981 }
|
|
|
3982 else
|
|
|
3983 { /* Processing Non-ASCII character */
|
|
|
3984 char_boundary = 1;
|
|
|
3985 if (EQ (charset, Vcharset_control_1))
|
|
|
3986 {
|
|
|
3987 encode_utf8 (Vcharset_control_1, c, 0, dst);
|
|
|
3988 }
|
|
|
3989 else
|
|
|
3990 {
|
|
|
3991 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3992 {
|
|
|
3993 case 2:
|
|
|
3994 encode_utf8 (charset, c, 0, dst);
|
|
|
3995 break;
|
|
|
3996 case 3:
|
|
|
3997 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3998 {
|
|
|
3999 encode_utf8 (charset, c, 0, dst);
|
|
|
4000 ch = 0;
|
|
|
4001 }
|
|
|
4002 else if (ch)
|
|
|
4003 {
|
|
|
4004 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4005 if (EQ (charset, Vcharset_composite))
|
|
|
4006 {
|
|
|
4007 if (in_composite)
|
|
|
4008 {
|
|
|
4009 /* #### Bother! We don't know how to
|
|
|
4010 handle this yet. */
|
|
|
4011 encode_utf8 (Vcharset_ascii, '~', 0, dst);
|
|
|
4012 }
|
|
|
4013 else
|
|
|
4014 {
|
|
|
4015 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
4016 ch & 0x7F, c & 0x7F);
|
|
|
4017 Lisp_Object lstr = composite_char_string (emch);
|
|
|
4018 saved_n = n;
|
|
|
4019 saved_src = src;
|
|
|
4020 in_composite = 1;
|
|
|
4021 src = XSTRING_DATA (lstr);
|
|
|
4022 n = XSTRING_LENGTH (lstr);
|
|
|
4023 }
|
|
|
4024 }
|
|
|
4025 else
|
|
|
4026 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4027 {
|
|
|
4028 encode_utf8 (charset, ch, c, dst);
|
|
|
4029 }
|
|
|
4030 ch = 0;
|
|
|
4031 }
|
|
|
4032 else
|
|
|
4033 {
|
|
|
4034 ch = c;
|
|
|
4035 char_boundary = 0;
|
|
|
4036 }
|
|
|
4037 break;
|
|
|
4038 case 4:
|
|
|
4039 if (ch)
|
|
|
4040 {
|
|
|
4041 encode_utf8 (charset, ch, c, dst);
|
|
|
4042 ch = 0;
|
|
|
4043 }
|
|
|
4044 else
|
|
|
4045 {
|
|
|
4046 ch = c;
|
|
|
4047 char_boundary = 0;
|
|
|
4048 }
|
|
|
4049 break;
|
|
|
4050 default:
|
|
|
4051 abort ();
|
|
|
4052 }
|
|
|
4053 }
|
|
|
4054 }
|
|
|
4055 }
|
|
|
4056
|
|
|
4057 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4058 if (in_composite)
|
|
|
4059 {
|
|
|
4060 n = saved_n;
|
|
|
4061 src = saved_src;
|
|
|
4062 in_composite = 0;
|
|
|
4063 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
4064 }
|
|
|
4065 #endif
|
|
|
4066
|
|
|
4067 str->flags = flags;
|
|
|
4068 str->ch = ch;
|
|
|
4069 str->iso2022.current_char_boundary = char_boundary;
|
|
|
4070 str->iso2022.current_charset = charset;
|
|
|
4071
|
|
|
4072 /* Verbum caro factum est! */
|
|
|
4073 }
|
|
|
4074
|
|
|
4075
|
|
|
4076 /************************************************************************/
|
|
259
|
4077 /* ISO2022 methods */
|
|
|
4078 /************************************************************************/
|
|
|
4079
|
|
|
4080 /* The following note describes the coding system ISO2022 briefly.
|
|
396
|
4081 Since the intention of this note is to help understand the
|
|
|
4082 functions in this file, some parts are NOT ACCURATE or OVERLY
|
|
259
|
4083 SIMPLIFIED. For thorough understanding, please refer to the
|
|
|
4084 original document of ISO2022.
|
|
|
4085
|
|
|
4086 ISO2022 provides many mechanisms to encode several character sets
|
|
396
|
4087 in 7-bit and 8-bit environments. For 7-bit environments, all text
|
|
|
4088 is encoded using bytes less than 128. This may make the encoded
|
|
|
4089 text a little bit longer, but the text passes more easily through
|
|
|
4090 several gateways, some of which strip off MSB (Most Signigant Bit).
|
|
|
4091
|
|
|
4092 There are two kinds of character sets: control character set and
|
|
259
|
4093 graphic character set. The former contains control characters such
|
|
|
4094 as `newline' and `escape' to provide control functions (control
|
|
396
|
4095 functions are also provided by escape sequences). The latter
|
|
259
|
4096 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
|
4097 two control character sets and many graphic character sets.
|
|
|
4098
|
|
396
|
4099 Graphic character sets are classified into one of the following
|
|
|
4100 four classes, according to the number of bytes (DIMENSION) and
|
|
|
4101 number of characters in one dimension (CHARS) of the set:
|
|
|
4102 - DIMENSION1_CHARS94
|
|
|
4103 - DIMENSION1_CHARS96
|
|
|
4104 - DIMENSION2_CHARS94
|
|
|
4105 - DIMENSION2_CHARS96
|
|
|
4106
|
|
|
4107 In addition, each character set is assigned an identification tag,
|
|
|
4108 unique for each set, called "final character" (denoted as <F>
|
|
|
4109 hereafter). The <F> of each character set is decided by ECMA(*)
|
|
|
4110 when it is registered in ISO. The code range of <F> is 0x30..0x7F
|
|
|
4111 (0x30..0x3F are for private use only).
|
|
259
|
4112
|
|
|
4113 Note (*): ECMA = European Computer Manufacturers Association
|
|
|
4114
|
|
|
4115 Here are examples of graphic character set [NAME(<F>)]:
|
|
396
|
4116 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
|
4117 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
|
|
|
4118 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
|
|
|
4119 o DIMENSION2_CHARS96 -- none for the moment
|
|
|
4120
|
|
|
4121 A code area (1 byte = 8 bits) is divided into 4 areas, C0, GL, C1, and GR.
|
|
259
|
4122 C0 [0x00..0x1F] -- control character plane 0
|
|
|
4123 GL [0x20..0x7F] -- graphic character plane 0
|
|
|
4124 C1 [0x80..0x9F] -- control character plane 1
|
|
|
4125 GR [0xA0..0xFF] -- graphic character plane 1
|
|
|
4126
|
|
|
4127 A control character set is directly designated and invoked to C0 or
|
|
|
4128 C1 by an escape sequence. The most common case is that:
|
|
|
4129 - ISO646's control character set is designated/invoked to C0, and
|
|
|
4130 - ISO6429's control character set is designated/invoked to C1,
|
|
|
4131 and usually these designations/invocations are omitted in encoded
|
|
|
4132 text. In a 7-bit environment, only C0 can be used, and a control
|
|
|
4133 character for C1 is encoded by an appropriate escape sequence to
|
|
|
4134 fit into the environment. All control characters for C1 are
|
|
|
4135 defined to have corresponding escape sequences.
|
|
|
4136
|
|
|
4137 A graphic character set is at first designated to one of four
|
|
|
4138 graphic registers (G0 through G3), then these graphic registers are
|
|
|
4139 invoked to GL or GR. These designations and invocations can be
|
|
|
4140 done independently. The most common case is that G0 is invoked to
|
|
|
4141 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
|
4142 these invocations and designations are omitted in encoded text.
|
|
|
4143 In a 7-bit environment, only GL can be used.
|
|
|
4144
|
|
396
|
4145 When a graphic character set of CHARS94 is invoked to GL, codes
|
|
|
4146 0x20 and 0x7F of the GL area work as control characters SPACE and
|
|
|
4147 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
|
|
|
4148 be used.
|
|
259
|
4149
|
|
|
4150 There are two ways of invocation: locking-shift and single-shift.
|
|
|
4151 With locking-shift, the invocation lasts until the next different
|
|
396
|
4152 invocation, whereas with single-shift, the invocation affects the
|
|
|
4153 following character only and doesn't affect the locking-shift
|
|
|
4154 state. Invocations are done by the following control characters or
|
|
|
4155 escape sequences:
|
|
259
|
4156
|
|
|
4157 ----------------------------------------------------------------------
|
|
|
4158 abbrev function cntrl escape seq description
|
|
|
4159 ----------------------------------------------------------------------
|
|
|
4160 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
|
4161 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
|
4162 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
|
4163 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
|
396
|
4164 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
|
|
|
4165 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
|
|
|
4166 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
|
|
259
|
4167 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
|
4168 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
|
4169 ----------------------------------------------------------------------
|
|
396
|
4170 (*) These are not used by any known coding system.
|
|
|
4171
|
|
|
4172 Control characters for these functions are defined by macros
|
|
|
4173 ISO_CODE_XXX in `coding.h'.
|
|
|
4174
|
|
|
4175 Designations are done by the following escape sequences:
|
|
259
|
4176 ----------------------------------------------------------------------
|
|
|
4177 escape sequence description
|
|
|
4178 ----------------------------------------------------------------------
|
|
396
|
4179 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
|
|
|
4180 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
|
|
|
4181 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
|
|
|
4182 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
|
|
|
4183 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
|
|
|
4184 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
|
|
|
4185 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
|
|
|
4186 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
|
|
|
4187 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
|
|
|
4188 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
|
|
|
4189 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
|
|
|
4190 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
|
|
|
4191 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
|
|
|
4192 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
|
|
|
4193 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
|
|
|
4194 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
|
|
259
|
4195 ----------------------------------------------------------------------
|
|
396
|
4196
|
|
|
4197 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
|
|
|
4198 of dimension 1, chars 94, and final character <F>, etc...
|
|
259
|
4199
|
|
|
4200 Note (*): Although these designations are not allowed in ISO2022,
|
|
|
4201 Emacs accepts them on decoding, and produces them on encoding
|
|
396
|
4202 CHARS96 character sets in a coding system which is characterized as
|
|
|
4203 7-bit environment, non-locking-shift, and non-single-shift.
|
|
259
|
4204
|
|
|
4205 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
|
396
|
4206 '(' can be omitted. We refer to this as "short-form" hereafter.
|
|
259
|
4207
|
|
|
4208 Now you may notice that there are a lot of ways for encoding the
|
|
|
4209 same multilingual text in ISO2022. Actually, there exist many
|
|
396
|
4210 coding systems such as Compound Text (used in X11's inter client
|
|
259
|
4211 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
|
4212 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
|
4213 localized platforms), and all of these are variants of ISO2022.
|
|
|
4214
|
|
|
4215 In addition to the above, Emacs handles two more kinds of escape
|
|
|
4216 sequences: ISO6429's direction specification and Emacs' private
|
|
|
4217 sequence for specifying character composition.
|
|
|
4218
|
|
396
|
4219 ISO6429's direction specification takes the following form:
|
|
259
|
4220 o CSI ']' -- end of the current direction
|
|
|
4221 o CSI '0' ']' -- end of the current direction
|
|
|
4222 o CSI '1' ']' -- start of left-to-right text
|
|
|
4223 o CSI '2' ']' -- start of right-to-left text
|
|
|
4224 The control character CSI (0x9B: control sequence introducer) is
|
|
396
|
4225 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
|
|
|
4226
|
|
|
4227 Character composition specification takes the following form:
|
|
259
|
4228 o ESC '0' -- start character composition
|
|
|
4229 o ESC '1' -- end character composition
|
|
396
|
4230 Since these are not standard escape sequences of any ISO standard,
|
|
|
4231 their use with these meanings is restricted to Emacs only. */
|
|
259
|
4232
|
|
|
4233 static void
|
|
|
4234 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
|
4235 {
|
|
|
4236 int i;
|
|
|
4237
|
|
|
4238 for (i = 0; i < 4; i++)
|
|
|
4239 {
|
|
|
4240 if (!NILP (coding_system))
|
|
|
4241 iso->charset[i] =
|
|
|
4242 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
|
4243 else
|
|
|
4244 iso->charset[i] = Qt;
|
|
|
4245 iso->invalid_designated[i] = 0;
|
|
|
4246 }
|
|
|
4247 iso->esc = ISO_ESC_NOTHING;
|
|
|
4248 iso->esc_bytes_index = 0;
|
|
|
4249 iso->register_left = 0;
|
|
|
4250 iso->register_right = 1;
|
|
|
4251 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4252 iso->invalid_switch_dir = 0;
|
|
|
4253 iso->output_direction_sequence = 0;
|
|
|
4254 iso->output_literally = 0;
|
|
396
|
4255 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4256 if (iso->composite_chars)
|
|
|
4257 Dynarr_reset (iso->composite_chars);
|
|
396
|
4258 #endif
|
|
259
|
4259 }
|
|
|
4260
|
|
|
4261 static int
|
|
|
4262 fit_to_be_escape_quoted (unsigned char c)
|
|
|
4263 {
|
|
|
4264 switch (c)
|
|
|
4265 {
|
|
|
4266 case ISO_CODE_ESC:
|
|
|
4267 case ISO_CODE_CSI:
|
|
|
4268 case ISO_CODE_SS2:
|
|
|
4269 case ISO_CODE_SS3:
|
|
|
4270 case ISO_CODE_SO:
|
|
|
4271 case ISO_CODE_SI:
|
|
|
4272 return 1;
|
|
|
4273
|
|
|
4274 default:
|
|
|
4275 return 0;
|
|
|
4276 }
|
|
|
4277 }
|
|
|
4278
|
|
|
4279 /* Parse one byte of an ISO2022 escape sequence.
|
|
|
4280 If the result is an invalid escape sequence, return 0 and
|
|
|
4281 do not change anything in STR. Otherwise, if the result is
|
|
|
4282 an incomplete escape sequence, update ISO2022.ESC and
|
|
|
4283 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
|
4284 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
|
4285 return 1.
|
|
|
4286
|
|
|
4287 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
|
4288 or invocation of an invalid character set and treat that as
|
|
|
4289 an unrecognized escape sequence. */
|
|
|
4290
|
|
|
4291 static int
|
|
|
4292 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
|
4293 unsigned char c, unsigned int *flags,
|
|
|
4294 int check_invalid_charsets)
|
|
|
4295 {
|
|
|
4296 /* (1) If we're at the end of a designation sequence, CS is the
|
|
|
4297 charset being designated and REG is the register to designate
|
|
|
4298 it to.
|
|
|
4299
|
|
|
4300 (2) If we're at the end of a locking-shift sequence, REG is
|
|
|
4301 the register to invoke and HALF (0 == left, 1 == right) is
|
|
|
4302 the half to invoke it into.
|
|
|
4303
|
|
|
4304 (3) If we're at the end of a single-shift sequence, REG is
|
|
|
4305 the register to invoke. */
|
|
|
4306 Lisp_Object cs = Qnil;
|
|
|
4307 int reg, half;
|
|
|
4308
|
|
|
4309 /* NOTE: This code does goto's all over the fucking place.
|
|
|
4310 The reason for this is that we're basically implementing
|
|
|
4311 a state machine here, and hierarchical languages like C
|
|
|
4312 don't really provide a clean way of doing this. */
|
|
|
4313
|
|
|
4314 if (! (*flags & CODING_STATE_ESCAPE))
|
|
|
4315 /* At beginning of escape sequence; we need to reset our
|
|
|
4316 escape-state variables. */
|
|
|
4317 iso->esc = ISO_ESC_NOTHING;
|
|
|
4318
|
|
|
4319 iso->output_literally = 0;
|
|
|
4320 iso->output_direction_sequence = 0;
|
|
|
4321
|
|
|
4322 switch (iso->esc)
|
|
|
4323 {
|
|
|
4324 case ISO_ESC_NOTHING:
|
|
|
4325 iso->esc_bytes_index = 0;
|
|
|
4326 switch (c)
|
|
|
4327 {
|
|
|
4328 case ISO_CODE_ESC: /* Start escape sequence */
|
|
|
4329 *flags |= CODING_STATE_ESCAPE;
|
|
|
4330 iso->esc = ISO_ESC;
|
|
|
4331 goto not_done;
|
|
|
4332
|
|
|
4333 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
|
4334 *flags |= CODING_STATE_ESCAPE;
|
|
|
4335 iso->esc = ISO_ESC_5_11;
|
|
|
4336 goto not_done;
|
|
|
4337
|
|
|
4338 case ISO_CODE_SO: /* locking shift 1 */
|
|
|
4339 reg = 1; half = 0;
|
|
|
4340 goto locking_shift;
|
|
|
4341 case ISO_CODE_SI: /* locking shift 0 */
|
|
|
4342 reg = 0; half = 0;
|
|
|
4343 goto locking_shift;
|
|
|
4344
|
|
|
4345 case ISO_CODE_SS2: /* single shift */
|
|
|
4346 reg = 2;
|
|
|
4347 goto single_shift;
|
|
|
4348 case ISO_CODE_SS3: /* single shift */
|
|
|
4349 reg = 3;
|
|
|
4350 goto single_shift;
|
|
|
4351
|
|
|
4352 default: /* Other control characters */
|
|
|
4353 return 0;
|
|
|
4354 }
|
|
|
4355
|
|
|
4356 case ISO_ESC:
|
|
|
4357 switch (c)
|
|
|
4358 {
|
|
|
4359 /**** single shift ****/
|
|
|
4360
|
|
|
4361 case 'N': /* single shift 2 */
|
|
|
4362 reg = 2;
|
|
|
4363 goto single_shift;
|
|
|
4364 case 'O': /* single shift 3 */
|
|
|
4365 reg = 3;
|
|
|
4366 goto single_shift;
|
|
|
4367
|
|
|
4368 /**** locking shift ****/
|
|
|
4369
|
|
|
4370 case '~': /* locking shift 1 right */
|
|
|
4371 reg = 1; half = 1;
|
|
|
4372 goto locking_shift;
|
|
|
4373 case 'n': /* locking shift 2 */
|
|
|
4374 reg = 2; half = 0;
|
|
|
4375 goto locking_shift;
|
|
|
4376 case '}': /* locking shift 2 right */
|
|
|
4377 reg = 2; half = 1;
|
|
|
4378 goto locking_shift;
|
|
|
4379 case 'o': /* locking shift 3 */
|
|
|
4380 reg = 3; half = 0;
|
|
|
4381 goto locking_shift;
|
|
|
4382 case '|': /* locking shift 3 right */
|
|
|
4383 reg = 3; half = 1;
|
|
|
4384 goto locking_shift;
|
|
|
4385
|
|
396
|
4386 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4387 /**** composite ****/
|
|
|
4388
|
|
|
4389 case '0':
|
|
|
4390 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
|
4391 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
|
4392 CODING_STATE_COMPOSITE;
|
|
|
4393 return 1;
|
|
|
4394
|
|
|
4395 case '1':
|
|
|
4396 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
|
4397 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
|
4398 ~CODING_STATE_COMPOSITE;
|
|
|
4399 return 1;
|
|
396
|
4400 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
4401
|
|
|
4402 /**** directionality ****/
|
|
|
4403
|
|
|
4404 case '[':
|
|
|
4405 iso->esc = ISO_ESC_5_11;
|
|
|
4406 goto not_done;
|
|
|
4407
|
|
|
4408 /**** designation ****/
|
|
|
4409
|
|
|
4410 case '$': /* multibyte charset prefix */
|
|
|
4411 iso->esc = ISO_ESC_2_4;
|
|
|
4412 goto not_done;
|
|
|
4413
|
|
|
4414 default:
|
|
|
4415 if (0x28 <= c && c <= 0x2F)
|
|
|
4416 {
|
|
|
4417 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
|
|
|
4418 goto not_done;
|
|
|
4419 }
|
|
|
4420
|
|
|
4421 /* This function is called with CODESYS equal to nil when
|
|
|
4422 doing coding-system detection. */
|
|
|
4423 if (!NILP (codesys)
|
|
|
4424 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4425 && fit_to_be_escape_quoted (c))
|
|
|
4426 {
|
|
|
4427 iso->esc = ISO_ESC_LITERAL;
|
|
|
4428 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4429 return 1;
|
|
|
4430 }
|
|
|
4431
|
|
|
4432 /* bzzzt! */
|
|
|
4433 return 0;
|
|
|
4434 }
|
|
|
4435
|
|
|
4436
|
|
|
4437
|
|
|
4438 /**** directionality ****/
|
|
|
4439
|
|
|
4440 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
|
4441 if (c == ']')
|
|
|
4442 {
|
|
|
4443 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4444 goto directionality;
|
|
|
4445 }
|
|
|
4446 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
|
4447 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
|
4448 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
|
4449 else return 0;
|
|
|
4450 goto not_done;
|
|
|
4451
|
|
|
4452 case ISO_ESC_5_11_0:
|
|
|
4453 if (c == ']')
|
|
|
4454 {
|
|
|
4455 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4456 goto directionality;
|
|
|
4457 }
|
|
|
4458 return 0;
|
|
|
4459
|
|
|
4460 case ISO_ESC_5_11_1:
|
|
|
4461 if (c == ']')
|
|
|
4462 {
|
|
|
4463 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4464 goto directionality;
|
|
|
4465 }
|
|
|
4466 return 0;
|
|
|
4467
|
|
|
4468 case ISO_ESC_5_11_2:
|
|
|
4469 if (c == ']')
|
|
|
4470 {
|
|
|
4471 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
|
4472 goto directionality;
|
|
|
4473 }
|
|
|
4474 return 0;
|
|
|
4475
|
|
|
4476 directionality:
|
|
|
4477 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
|
4478 /* Various junk here to attempt to preserve the direction sequences
|
|
|
4479 literally in the text if they would otherwise be swallowed due
|
|
|
4480 to invalid designations that don't show up as actual charset
|
|
|
4481 changes in the text. */
|
|
|
4482 if (iso->invalid_switch_dir)
|
|
|
4483 {
|
|
|
4484 /* We already inserted a direction switch literally into the
|
|
|
4485 text. We assume (#### this may not be right) that the
|
|
|
4486 next direction switch is the one going the other way,
|
|
|
4487 and we need to output that literally as well. */
|
|
|
4488 iso->output_literally = 1;
|
|
|
4489 iso->invalid_switch_dir = 0;
|
|
|
4490 }
|
|
|
4491 else
|
|
|
4492 {
|
|
|
4493 int jj;
|
|
|
4494
|
|
|
4495 /* If we are in the thrall of an invalid designation,
|
|
|
4496 then stick the directionality sequence literally into the
|
|
|
4497 output stream so it ends up in the original text again. */
|
|
|
4498 for (jj = 0; jj < 4; jj++)
|
|
|
4499 if (iso->invalid_designated[jj])
|
|
|
4500 break;
|
|
|
4501 if (jj < 4)
|
|
|
4502 {
|
|
|
4503 iso->output_literally = 1;
|
|
|
4504 iso->invalid_switch_dir = 1;
|
|
|
4505 }
|
|
|
4506 else
|
|
|
4507 /* Indicate that we haven't yet seen a valid designation,
|
|
|
4508 so that if a switch-dir is directly followed by an
|
|
|
4509 invalid designation, both get inserted literally. */
|
|
|
4510 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
|
4511 }
|
|
|
4512 return 1;
|
|
|
4513
|
|
|
4514
|
|
|
4515 /**** designation ****/
|
|
|
4516
|
|
|
4517 case ISO_ESC_2_4:
|
|
|
4518 if (0x28 <= c && c <= 0x2F)
|
|
|
4519 {
|
|
|
4520 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
|
|
|
4521 goto not_done;
|
|
|
4522 }
|
|
|
4523 if (0x40 <= c && c <= 0x42)
|
|
|
4524 {
|
|
|
4525 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
|
4526 *flags & CODING_STATE_R2L ?
|
|
|
4527 CHARSET_RIGHT_TO_LEFT :
|
|
|
4528 CHARSET_LEFT_TO_RIGHT);
|
|
|
4529 reg = 0;
|
|
|
4530 goto designated;
|
|
|
4531 }
|
|
|
4532 return 0;
|
|
|
4533
|
|
|
4534 default:
|
|
|
4535 {
|
|
|
4536 int type =-1;
|
|
|
4537
|
|
|
4538 if (c < '0' || c > '~')
|
|
|
4539 return 0; /* bad final byte */
|
|
|
4540
|
|
|
4541 if (iso->esc >= ISO_ESC_2_8 &&
|
|
|
4542 iso->esc <= ISO_ESC_2_15)
|
|
|
4543 {
|
|
|
4544 type = ((iso->esc >= ISO_ESC_2_12) ?
|
|
|
4545 CHARSET_TYPE_96 : CHARSET_TYPE_94);
|
|
|
4546 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
|
4547 }
|
|
|
4548 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
|
4549 iso->esc <= ISO_ESC_2_4_15)
|
|
|
4550 {
|
|
|
4551 type = ((iso->esc >= ISO_ESC_2_4_12) ?
|
|
|
4552 CHARSET_TYPE_96X96 : CHARSET_TYPE_94X94);
|
|
|
4553 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
|
4554 }
|
|
|
4555 else
|
|
|
4556 {
|
|
|
4557 /* Can this ever be reached? -slb */
|
|
|
4558 abort();
|
|
|
4559 }
|
|
|
4560
|
|
|
4561 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
|
4562 *flags & CODING_STATE_R2L ?
|
|
|
4563 CHARSET_RIGHT_TO_LEFT :
|
|
|
4564 CHARSET_LEFT_TO_RIGHT);
|
|
|
4565 goto designated;
|
|
|
4566 }
|
|
|
4567 }
|
|
|
4568
|
|
|
4569 not_done:
|
|
|
4570 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
|
4571 return -1;
|
|
|
4572
|
|
|
4573 single_shift:
|
|
|
4574 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
|
4575 /* can't invoke something that ain't there. */
|
|
|
4576 return 0;
|
|
|
4577 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
|
4578 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4579 if (reg == 2)
|
|
|
4580 *flags |= CODING_STATE_SS2;
|
|
|
4581 else
|
|
|
4582 *flags |= CODING_STATE_SS3;
|
|
|
4583 return 1;
|
|
|
4584
|
|
|
4585 locking_shift:
|
|
|
4586 if (check_invalid_charsets &&
|
|
|
4587 !CHARSETP (iso->charset[reg]))
|
|
|
4588 /* can't invoke something that ain't there. */
|
|
|
4589 return 0;
|
|
|
4590 if (half)
|
|
|
4591 iso->register_right = reg;
|
|
|
4592 else
|
|
|
4593 iso->register_left = reg;
|
|
|
4594 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4595 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
|
4596 return 1;
|
|
|
4597
|
|
|
4598 designated:
|
|
|
4599 if (NILP (cs) && check_invalid_charsets)
|
|
|
4600 {
|
|
|
4601 iso->invalid_designated[reg] = 1;
|
|
|
4602 iso->charset[reg] = Vcharset_ascii;
|
|
|
4603 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4604 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4605 iso->output_literally = 1;
|
|
|
4606 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4607 {
|
|
|
4608 /* We encountered a switch-direction followed by an
|
|
|
4609 invalid designation. Ensure that the switch-direction
|
|
|
4610 gets outputted; otherwise it will probably get eaten
|
|
|
4611 when the text is written out again. */
|
|
|
4612 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4613 iso->output_direction_sequence = 1;
|
|
|
4614 /* And make sure that the switch-dir going the other
|
|
|
4615 way gets outputted, as well. */
|
|
|
4616 iso->invalid_switch_dir = 1;
|
|
|
4617 }
|
|
|
4618 return 1;
|
|
|
4619 }
|
|
|
4620 /* This function is called with CODESYS equal to nil when
|
|
|
4621 doing coding-system detection. */
|
|
|
4622 if (!NILP (codesys))
|
|
|
4623 {
|
|
|
4624 charset_conversion_spec_dynarr *dyn =
|
|
|
4625 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
|
4626
|
|
|
4627 if (dyn)
|
|
|
4628 {
|
|
|
4629 int i;
|
|
|
4630
|
|
|
4631 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4632 {
|
|
|
4633 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4634 if (EQ (cs, spec->from_charset))
|
|
|
4635 cs = spec->to_charset;
|
|
|
4636 }
|
|
|
4637 }
|
|
|
4638 }
|
|
|
4639
|
|
|
4640 iso->charset[reg] = cs;
|
|
|
4641 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4642 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4643 if (iso->invalid_designated[reg])
|
|
|
4644 {
|
|
|
4645 iso->invalid_designated[reg] = 0;
|
|
|
4646 iso->output_literally = 1;
|
|
|
4647 }
|
|
|
4648 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4649 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4650 return 1;
|
|
|
4651 }
|
|
|
4652
|
|
|
4653 static int
|
|
398
|
4654 detect_coding_iso2022 (struct detection_state *st, const unsigned char *src,
|
|
259
|
4655 unsigned int n)
|
|
|
4656 {
|
|
|
4657 int mask;
|
|
|
4658
|
|
|
4659 /* #### There are serious deficiencies in the recognition mechanism
|
|
388
|
4660 here. This needs to be much smarter if it's going to cut it.
|
|
|
4661 The sequence "\xff\x0f" is currently detected as LOCK_SHIFT while
|
|
|
4662 it should be detected as Latin-1.
|
|
|
4663 All the ISO2022 stuff in this file should be synced up with the
|
|
|
4664 code from FSF Emacs-20.4, in which Mule should be more or less stable.
|
|
|
4665 Perhaps we should wait till R2L works in FSF Emacs? */
|
|
259
|
4666
|
|
|
4667 if (!st->iso2022.initted)
|
|
|
4668 {
|
|
|
4669 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
|
4670 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
|
4671 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4672 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4673 CODING_CATEGORY_ISO_8_2_MASK |
|
|
|
4674 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
|
4675 st->iso2022.flags = 0;
|
|
|
4676 st->iso2022.high_byte_count = 0;
|
|
|
4677 st->iso2022.saw_single_shift = 0;
|
|
|
4678 st->iso2022.initted = 1;
|
|
|
4679 }
|
|
|
4680
|
|
|
4681 mask = st->iso2022.mask;
|
|
|
4682
|
|
|
4683 while (n--)
|
|
|
4684 {
|
|
388
|
4685 int c = *src++;
|
|
259
|
4686 if (c >= 0xA0)
|
|
|
4687 {
|
|
|
4688 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4689 st->iso2022.high_byte_count++;
|
|
|
4690 }
|
|
|
4691 else
|
|
|
4692 {
|
|
|
4693 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
|
4694 {
|
|
|
4695 if (st->iso2022.high_byte_count & 1)
|
|
|
4696 /* odd number of high bytes; assume not iso-8-2 */
|
|
|
4697 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4698 }
|
|
|
4699 st->iso2022.high_byte_count = 0;
|
|
|
4700 st->iso2022.saw_single_shift = 0;
|
|
|
4701 if (c > 0x80)
|
|
|
4702 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4703 }
|
|
|
4704 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
|
4705 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
|
4706 { /* control chars */
|
|
|
4707 switch (c)
|
|
|
4708 {
|
|
|
4709 /* Allow and ignore control characters that you might
|
|
|
4710 reasonably see in a text file */
|
|
|
4711 case '\r':
|
|
|
4712 case '\n':
|
|
|
4713 case '\t':
|
|
|
4714 case 7: /* bell */
|
|
|
4715 case 8: /* backspace */
|
|
|
4716 case 11: /* vertical tab */
|
|
|
4717 case 12: /* form feed */
|
|
|
4718 case 26: /* MS-DOS C-z junk */
|
|
|
4719 case 31: /* '^_' -- for info */
|
|
|
4720 goto label_continue_loop;
|
|
|
4721
|
|
|
4722 default:
|
|
|
4723 break;
|
|
|
4724 }
|
|
|
4725 }
|
|
|
4726
|
|
|
4727 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
|
4728 || BYTE_C1_P (c))
|
|
|
4729 {
|
|
|
4730 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
|
4731 &st->iso2022.flags, 0))
|
|
|
4732 {
|
|
|
4733 switch (st->iso2022.iso.esc)
|
|
|
4734 {
|
|
|
4735 case ISO_ESC_DESIGNATE:
|
|
|
4736 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
|
4737 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4738 break;
|
|
|
4739 case ISO_ESC_LOCKING_SHIFT:
|
|
|
4740 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
|
4741 goto ran_out_of_chars;
|
|
|
4742 case ISO_ESC_SINGLE_SHIFT:
|
|
|
4743 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
|
4744 st->iso2022.saw_single_shift = 1;
|
|
|
4745 break;
|
|
|
4746 default:
|
|
|
4747 break;
|
|
|
4748 }
|
|
|
4749 }
|
|
|
4750 else
|
|
|
4751 {
|
|
|
4752 mask = 0;
|
|
|
4753 goto ran_out_of_chars;
|
|
|
4754 }
|
|
|
4755 }
|
|
|
4756 label_continue_loop:;
|
|
|
4757 }
|
|
|
4758
|
|
|
4759 ran_out_of_chars:
|
|
|
4760
|
|
|
4761 return mask;
|
|
|
4762 }
|
|
|
4763
|
|
|
4764 static int
|
|
|
4765 postprocess_iso2022_mask (int mask)
|
|
|
4766 {
|
|
|
4767 /* #### kind of cheesy */
|
|
|
4768 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
|
4769 entirely seven-bit and turn off the eight-bit ones. */
|
|
|
4770 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
|
4771 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4772 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4773 CODING_CATEGORY_ISO_8_2_MASK);
|
|
|
4774 return mask;
|
|
|
4775 }
|
|
|
4776
|
|
|
4777 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
|
4778 output a switch-dir-to-left-to-right sequence to DST.
|
|
|
4779 Also update FLAGS if it is not a null pointer.
|
|
|
4780 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4781 need to handle the CSI differently. */
|
|
|
4782
|
|
|
4783 static void
|
|
396
|
4784 restore_left_to_right_direction (Lisp_Coding_System *codesys,
|
|
259
|
4785 unsigned_char_dynarr *dst,
|
|
|
4786 unsigned int *flags,
|
|
|
4787 int internal_p)
|
|
|
4788 {
|
|
|
4789 if (!flags || (*flags & CODING_STATE_R2L))
|
|
|
4790 {
|
|
|
4791 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4792 {
|
|
|
4793 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4794 Dynarr_add (dst, '[');
|
|
|
4795 }
|
|
|
4796 else if (internal_p)
|
|
|
4797 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4798 else
|
|
|
4799 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4800 Dynarr_add (dst, '0');
|
|
|
4801 Dynarr_add (dst, ']');
|
|
|
4802 if (flags)
|
|
|
4803 *flags &= ~CODING_STATE_R2L;
|
|
|
4804 }
|
|
|
4805 }
|
|
|
4806
|
|
|
4807 /* If FLAGS is a null pointer or specifies a direction different from
|
|
|
4808 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
|
4809 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
|
4810 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
|
4811 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4812 need to handle the CSI differently. */
|
|
|
4813
|
|
|
4814 static void
|
|
396
|
4815 ensure_correct_direction (int direction, Lisp_Coding_System *codesys,
|
|
259
|
4816 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
|
4817 int internal_p)
|
|
|
4818 {
|
|
|
4819 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
|
4820 direction == CHARSET_LEFT_TO_RIGHT)
|
|
|
4821 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
|
4822 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
|
4823 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
|
4824 direction == CHARSET_RIGHT_TO_LEFT)
|
|
|
4825 {
|
|
|
4826 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4827 {
|
|
|
4828 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4829 Dynarr_add (dst, '[');
|
|
|
4830 }
|
|
|
4831 else if (internal_p)
|
|
|
4832 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4833 else
|
|
|
4834 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4835 Dynarr_add (dst, '2');
|
|
|
4836 Dynarr_add (dst, ']');
|
|
|
4837 if (flags)
|
|
|
4838 *flags |= CODING_STATE_R2L;
|
|
|
4839 }
|
|
|
4840 }
|
|
|
4841
|
|
|
4842 /* Convert ISO2022-format data to internal format. */
|
|
|
4843
|
|
|
4844 static void
|
|
398
|
4845 decode_coding_iso2022 (Lstream *decoding, const unsigned char *src,
|
|
259
|
4846 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4847 {
|
|
|
4848 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
4849 unsigned int flags = str->flags;
|
|
|
4850 unsigned int ch = str->ch;
|
|
|
4851 eol_type_t eol_type = str->eol_type;
|
|
|
4852 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4853 unsigned_char_dynarr *real_dst = dst;
|
|
396
|
4854 #endif
|
|
|
4855 Lisp_Object coding_system;
|
|
|
4856
|
|
259
|
4857 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
4858
|
|
396
|
4859 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4860 if (flags & CODING_STATE_COMPOSITE)
|
|
|
4861 dst = str->iso2022.composite_chars;
|
|
396
|
4862 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
4863
|
|
|
4864 while (n--)
|
|
|
4865 {
|
|
388
|
4866 unsigned char c = *src++;
|
|
259
|
4867 if (flags & CODING_STATE_ESCAPE)
|
|
|
4868 { /* Within ESC sequence */
|
|
|
4869 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
|
4870 c, &flags, 1);
|
|
|
4871
|
|
|
4872 if (retval)
|
|
|
4873 {
|
|
|
4874 switch (str->iso2022.esc)
|
|
|
4875 {
|
|
396
|
4876 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
4877 case ISO_ESC_START_COMPOSITE:
|
|
|
4878 if (str->iso2022.composite_chars)
|
|
|
4879 Dynarr_reset (str->iso2022.composite_chars);
|
|
|
4880 else
|
|
|
4881 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
|
|
|
4882 dst = str->iso2022.composite_chars;
|
|
|
4883 break;
|
|
|
4884 case ISO_ESC_END_COMPOSITE:
|
|
|
4885 {
|
|
|
4886 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
|
4887 Bytecount len;
|
|
|
4888 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
|
4889 Dynarr_length (dst));
|
|
|
4890 dst = real_dst;
|
|
|
4891 len = set_charptr_emchar (comstr, emch);
|
|
|
4892 Dynarr_add_many (dst, comstr, len);
|
|
|
4893 break;
|
|
|
4894 }
|
|
396
|
4895 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
4896
|
|
|
4897 case ISO_ESC_LITERAL:
|
|
|
4898 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4899 break;
|
|
|
4900
|
|
|
4901 default:
|
|
|
4902 /* Everything else handled already */
|
|
|
4903 break;
|
|
|
4904 }
|
|
|
4905 }
|
|
|
4906
|
|
|
4907 /* Attempted error recovery. */
|
|
|
4908 if (str->iso2022.output_direction_sequence)
|
|
|
4909 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
|
4910 CHARSET_RIGHT_TO_LEFT :
|
|
|
4911 CHARSET_LEFT_TO_RIGHT,
|
|
|
4912 str->codesys, dst, 0, 1);
|
|
|
4913 /* More error recovery. */
|
|
|
4914 if (!retval || str->iso2022.output_literally)
|
|
|
4915 {
|
|
|
4916 /* Output the (possibly invalid) sequence */
|
|
|
4917 int i;
|
|
|
4918 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
|
4919 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
|
4920 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4921 if (!retval)
|
|
|
4922 n++, src--;/* Repeat the loop with the same character. */
|
|
|
4923 else
|
|
|
4924 {
|
|
|
4925 /* No sense in reprocessing the final byte of the
|
|
|
4926 escape sequence; it could mess things up anyway.
|
|
|
4927 Just add it now. */
|
|
|
4928 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4929 }
|
|
|
4930 }
|
|
|
4931 ch = 0;
|
|
|
4932 }
|
|
|
4933 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
|
4934 { /* Control characters */
|
|
|
4935
|
|
|
4936 /***** Error-handling *****/
|
|
|
4937
|
|
|
4938 /* If we were in the middle of a character, dump out the
|
|
|
4939 partial character. */
|
|
|
4940 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4941
|
|
|
4942 /* If we just saw a single-shift character, dump it out.
|
|
|
4943 This may dump out the wrong sort of single-shift character,
|
|
|
4944 but least it will give an indication that something went
|
|
|
4945 wrong. */
|
|
|
4946 if (flags & CODING_STATE_SS2)
|
|
|
4947 {
|
|
|
4948 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
|
4949 flags &= ~CODING_STATE_SS2;
|
|
|
4950 }
|
|
|
4951 if (flags & CODING_STATE_SS3)
|
|
|
4952 {
|
|
|
4953 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
|
4954 flags &= ~CODING_STATE_SS3;
|
|
|
4955 }
|
|
|
4956
|
|
|
4957 /***** Now handle the control characters. *****/
|
|
|
4958
|
|
|
4959 /* Handle CR/LF */
|
|
|
4960 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4961
|
|
|
4962 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4963
|
|
|
4964 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
|
4965 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4966 }
|
|
|
4967 else
|
|
|
4968 { /* Graphic characters */
|
|
|
4969 Lisp_Object charset;
|
|
|
4970 int lb;
|
|
|
4971 int reg;
|
|
|
4972
|
|
|
4973 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4974
|
|
|
4975 /* Now determine the charset. */
|
|
|
4976 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
|
4977 : (flags & CODING_STATE_SS3) ? 3
|
|
|
4978 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
|
4979 : str->iso2022.register_left);
|
|
|
4980 charset = str->iso2022.charset[reg];
|
|
|
4981
|
|
|
4982 /* Error checking: */
|
|
388
|
4983 if (! CHARSETP (charset)
|
|
|
4984 || str->iso2022.invalid_designated[reg]
|
|
259
|
4985 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
|
4986 && XCHARSET_CHARS (charset) == 94))
|
|
|
4987 /* Mrmph. We are trying to invoke a register that has no
|
|
|
4988 or an invalid charset in it, or trying to add a character
|
|
|
4989 outside the range of the charset. Insert that char literally
|
|
|
4990 to preserve it for the output. */
|
|
|
4991 {
|
|
|
4992 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4993 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4994 }
|
|
|
4995
|
|
|
4996 else
|
|
|
4997 {
|
|
|
4998 /* Things are probably hunky-dorey. */
|
|
|
4999
|
|
|
5000 /* Fetch reverse charset, maybe. */
|
|
|
5001 if (((flags & CODING_STATE_R2L) &&
|
|
|
5002 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
|
5003 ||
|
|
|
5004 (!(flags & CODING_STATE_R2L) &&
|
|
|
5005 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
|
5006 {
|
|
|
5007 Lisp_Object new_charset =
|
|
|
5008 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
|
5009 if (!NILP (new_charset))
|
|
|
5010 charset = new_charset;
|
|
|
5011 }
|
|
|
5012
|
|
|
5013 lb = XCHARSET_LEADING_BYTE (charset);
|
|
|
5014 switch (XCHARSET_REP_BYTES (charset))
|
|
|
5015 {
|
|
|
5016 case 1: /* ASCII */
|
|
|
5017 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5018 Dynarr_add (dst, c & 0x7F);
|
|
|
5019 break;
|
|
|
5020
|
|
|
5021 case 2: /* one-byte official */
|
|
|
5022 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5023 Dynarr_add (dst, lb);
|
|
|
5024 Dynarr_add (dst, c | 0x80);
|
|
|
5025 break;
|
|
|
5026
|
|
|
5027 case 3: /* one-byte private or two-byte official */
|
|
|
5028 if (XCHARSET_PRIVATE_P (charset))
|
|
|
5029 {
|
|
|
5030 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5031 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
|
5032 Dynarr_add (dst, lb);
|
|
|
5033 Dynarr_add (dst, c | 0x80);
|
|
|
5034 }
|
|
|
5035 else
|
|
|
5036 {
|
|
|
5037 if (ch)
|
|
|
5038 {
|
|
|
5039 Dynarr_add (dst, lb);
|
|
|
5040 Dynarr_add (dst, ch | 0x80);
|
|
|
5041 Dynarr_add (dst, c | 0x80);
|
|
|
5042 ch = 0;
|
|
|
5043 }
|
|
|
5044 else
|
|
|
5045 ch = c;
|
|
|
5046 }
|
|
|
5047 break;
|
|
|
5048
|
|
|
5049 default: /* two-byte private */
|
|
|
5050 if (ch)
|
|
|
5051 {
|
|
|
5052 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
|
5053 Dynarr_add (dst, lb);
|
|
|
5054 Dynarr_add (dst, ch | 0x80);
|
|
|
5055 Dynarr_add (dst, c | 0x80);
|
|
|
5056 ch = 0;
|
|
|
5057 }
|
|
|
5058 else
|
|
|
5059 ch = c;
|
|
|
5060 }
|
|
|
5061 }
|
|
|
5062
|
|
|
5063 if (!ch)
|
|
|
5064 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
5065 }
|
|
|
5066
|
|
|
5067 label_continue_loop:;
|
|
|
5068 }
|
|
|
5069
|
|
|
5070 if (flags & CODING_STATE_END)
|
|
|
5071 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5072
|
|
396
|
5073 str->flags = flags;
|
|
|
5074 str->ch = ch;
|
|
259
|
5075 }
|
|
|
5076
|
|
|
5077
|
|
|
5078 /***** ISO2022 encoder *****/
|
|
|
5079
|
|
|
5080 /* Designate CHARSET into register REG. */
|
|
|
5081
|
|
|
5082 static void
|
|
|
5083 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
|
5084 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5085 {
|
|
398
|
5086 static const char inter94[] = "()*+";
|
|
|
5087 static const char inter96[] = ",-./";
|
|
272
|
5088 unsigned int type;
|
|
259
|
5089 unsigned char final;
|
|
|
5090 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
|
5091
|
|
|
5092 str->iso2022.charset[reg] = charset;
|
|
|
5093 if (!CHARSETP (charset))
|
|
|
5094 /* charset might be an initial nil or t. */
|
|
|
5095 return;
|
|
|
5096 type = XCHARSET_TYPE (charset);
|
|
|
5097 final = XCHARSET_FINAL (charset);
|
|
|
5098 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
|
5099 CHARSETP (old_charset) &&
|
|
|
5100 XCHARSET_TYPE (old_charset) == type &&
|
|
|
5101 XCHARSET_FINAL (old_charset) == final)
|
|
|
5102 return;
|
|
|
5103
|
|
|
5104 str->iso2022.force_charset_on_output[reg] = 0;
|
|
|
5105
|
|
|
5106 {
|
|
|
5107 charset_conversion_spec_dynarr *dyn =
|
|
|
5108 str->codesys->iso2022.output_conv;
|
|
|
5109
|
|
|
5110 if (dyn)
|
|
|
5111 {
|
|
|
5112 int i;
|
|
|
5113
|
|
|
5114 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
5115 {
|
|
|
5116 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
5117 if (EQ (charset, spec->from_charset))
|
|
|
5118 charset = spec->to_charset;
|
|
|
5119 }
|
|
|
5120 }
|
|
|
5121 }
|
|
|
5122
|
|
|
5123 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5124 switch (type)
|
|
|
5125 {
|
|
|
5126 case CHARSET_TYPE_94:
|
|
|
5127 Dynarr_add (dst, inter94[reg]);
|
|
|
5128 break;
|
|
|
5129 case CHARSET_TYPE_96:
|
|
|
5130 Dynarr_add (dst, inter96[reg]);
|
|
|
5131 break;
|
|
|
5132 case CHARSET_TYPE_94X94:
|
|
|
5133 Dynarr_add (dst, '$');
|
|
|
5134 if (reg != 0
|
|
|
5135 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
|
5136 || final < '@'
|
|
|
5137 || final > 'B')
|
|
|
5138 Dynarr_add (dst, inter94[reg]);
|
|
|
5139 break;
|
|
|
5140 case CHARSET_TYPE_96X96:
|
|
|
5141 Dynarr_add (dst, '$');
|
|
|
5142 Dynarr_add (dst, inter96[reg]);
|
|
|
5143 break;
|
|
|
5144 }
|
|
|
5145 Dynarr_add (dst, final);
|
|
|
5146 }
|
|
|
5147
|
|
|
5148 static void
|
|
|
5149 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5150 {
|
|
|
5151 if (str->iso2022.register_left != 0)
|
|
|
5152 {
|
|
|
5153 Dynarr_add (dst, ISO_CODE_SI);
|
|
|
5154 str->iso2022.register_left = 0;
|
|
|
5155 }
|
|
|
5156 }
|
|
|
5157
|
|
|
5158 static void
|
|
|
5159 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5160 {
|
|
|
5161 if (str->iso2022.register_left != 1)
|
|
|
5162 {
|
|
|
5163 Dynarr_add (dst, ISO_CODE_SO);
|
|
|
5164 str->iso2022.register_left = 1;
|
|
|
5165 }
|
|
|
5166 }
|
|
|
5167
|
|
|
5168 /* Convert internally-formatted data to ISO2022 format. */
|
|
|
5169
|
|
|
5170 static void
|
|
398
|
5171 encode_coding_iso2022 (Lstream *encoding, const unsigned char *src,
|
|
259
|
5172 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5173 {
|
|
|
5174 unsigned char charmask, c;
|
|
|
5175 unsigned char char_boundary;
|
|
|
5176 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
5177 unsigned int flags = str->flags;
|
|
|
5178 unsigned int ch = str->ch;
|
|
|
5179 Lisp_Coding_System *codesys = str->codesys;
|
|
|
5180 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
5181 int i;
|
|
|
5182 Lisp_Object charset;
|
|
|
5183 int half;
|
|
|
5184
|
|
396
|
5185 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
5186 /* flags for handling composite chars. We do a little switcharoo
|
|
|
5187 on the source while we're outputting the composite char. */
|
|
|
5188 unsigned int saved_n = 0;
|
|
398
|
5189 const unsigned char *saved_src = NULL;
|
|
259
|
5190 int in_composite = 0;
|
|
396
|
5191 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5192
|
|
259
|
5193 char_boundary = str->iso2022.current_char_boundary;
|
|
|
5194 charset = str->iso2022.current_charset;
|
|
|
5195 half = str->iso2022.current_half;
|
|
|
5196
|
|
396
|
5197 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
5198 back_to_square_n:
|
|
396
|
5199 #endif
|
|
259
|
5200 while (n--)
|
|
|
5201 {
|
|
|
5202 c = *src++;
|
|
|
5203
|
|
|
5204 if (BYTE_ASCII_P (c))
|
|
|
5205 { /* Processing ASCII character */
|
|
|
5206 ch = 0;
|
|
|
5207
|
|
|
5208 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5209
|
|
|
5210 /* Make sure G0 contains ASCII */
|
|
|
5211 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
|
5212 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
|
5213 {
|
|
|
5214 ensure_normal_shift (str, dst);
|
|
|
5215 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
|
5216 }
|
|
|
5217
|
|
|
5218 /* If necessary, restore everything to the default state
|
|
|
5219 at end-of-line */
|
|
|
5220 if (c == '\n' &&
|
|
|
5221 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
|
5222 {
|
|
|
5223 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5224
|
|
|
5225 ensure_normal_shift (str, dst);
|
|
|
5226
|
|
|
5227 for (i = 0; i < 4; i++)
|
|
|
5228 {
|
|
|
5229 Lisp_Object initial_charset =
|
|
|
5230 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
5231 iso2022_designate (initial_charset, i, str, dst);
|
|
|
5232 }
|
|
|
5233 }
|
|
|
5234 if (c == '\n')
|
|
|
5235 {
|
|
|
5236 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
5237 Dynarr_add (dst, '\r');
|
|
|
5238 if (eol_type != EOL_CR)
|
|
|
5239 Dynarr_add (dst, c);
|
|
|
5240 }
|
|
|
5241 else
|
|
|
5242 {
|
|
|
5243 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
5244 && fit_to_be_escape_quoted (c))
|
|
|
5245 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5246 Dynarr_add (dst, c);
|
|
|
5247 }
|
|
|
5248 char_boundary = 1;
|
|
|
5249 }
|
|
|
5250
|
|
|
5251 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
5252 { /* Processing Leading Byte */
|
|
|
5253 ch = 0;
|
|
|
5254 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
5255 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
5256 ch = c;
|
|
|
5257 else if (!EQ (charset, Vcharset_control_1)
|
|
396
|
5258 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5259 && !EQ (charset, Vcharset_composite)
|
|
|
5260 #endif
|
|
|
5261 )
|
|
259
|
5262 {
|
|
|
5263 int reg;
|
|
|
5264
|
|
|
5265 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
|
5266 codesys, dst, &flags, 0);
|
|
|
5267
|
|
|
5268 /* Now determine which register to use. */
|
|
|
5269 reg = -1;
|
|
|
5270 for (i = 0; i < 4; i++)
|
|
|
5271 {
|
|
|
5272 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
|
5273 EQ (charset,
|
|
|
5274 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
|
5275 {
|
|
|
5276 reg = i;
|
|
|
5277 break;
|
|
|
5278 }
|
|
|
5279 }
|
|
|
5280
|
|
|
5281 if (reg == -1)
|
|
|
5282 {
|
|
|
5283 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
|
5284 {
|
|
|
5285 if (!NILP (str->iso2022.charset[1]) &&
|
|
|
5286 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
|
5287 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
|
5288 reg = 1;
|
|
|
5289 else if (!NILP (str->iso2022.charset[2]))
|
|
|
5290 reg = 2;
|
|
|
5291 else if (!NILP (str->iso2022.charset[3]))
|
|
|
5292 reg = 3;
|
|
|
5293 else
|
|
|
5294 reg = 0;
|
|
|
5295 }
|
|
|
5296 else
|
|
|
5297 reg = 0;
|
|
|
5298 }
|
|
|
5299
|
|
|
5300 iso2022_designate (charset, reg, str, dst);
|
|
|
5301
|
|
|
5302 /* Now invoke that register. */
|
|
|
5303 switch (reg)
|
|
|
5304 {
|
|
|
5305 case 0:
|
|
|
5306 ensure_normal_shift (str, dst);
|
|
|
5307 half = 0;
|
|
|
5308 break;
|
|
|
5309
|
|
|
5310 case 1:
|
|
|
5311 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
5312 {
|
|
|
5313 ensure_shift_out (str, dst);
|
|
|
5314 half = 0;
|
|
|
5315 }
|
|
|
5316 else
|
|
|
5317 half = 1;
|
|
|
5318 break;
|
|
|
5319
|
|
|
5320 case 2:
|
|
|
5321 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5322 {
|
|
|
5323 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5324 Dynarr_add (dst, 'N');
|
|
|
5325 half = 0;
|
|
|
5326 }
|
|
|
5327 else
|
|
|
5328 {
|
|
|
5329 Dynarr_add (dst, ISO_CODE_SS2);
|
|
|
5330 half = 1;
|
|
|
5331 }
|
|
|
5332 break;
|
|
|
5333
|
|
|
5334 case 3:
|
|
|
5335 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5336 {
|
|
|
5337 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5338 Dynarr_add (dst, 'O');
|
|
|
5339 half = 0;
|
|
|
5340 }
|
|
|
5341 else
|
|
|
5342 {
|
|
|
5343 Dynarr_add (dst, ISO_CODE_SS3);
|
|
|
5344 half = 1;
|
|
|
5345 }
|
|
|
5346 break;
|
|
|
5347
|
|
|
5348 default:
|
|
|
5349 abort ();
|
|
|
5350 }
|
|
|
5351 }
|
|
|
5352 char_boundary = 0;
|
|
|
5353 }
|
|
|
5354 else
|
|
|
5355 { /* Processing Non-ASCII character */
|
|
|
5356 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
|
5357 char_boundary = 1;
|
|
|
5358 if (EQ (charset, Vcharset_control_1))
|
|
|
5359 {
|
|
|
5360 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
5361 && fit_to_be_escape_quoted (c))
|
|
|
5362 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5363 /* you asked for it ... */
|
|
|
5364 Dynarr_add (dst, c - 0x20);
|
|
|
5365 }
|
|
|
5366 else
|
|
|
5367 {
|
|
|
5368 switch (XCHARSET_REP_BYTES (charset))
|
|
|
5369 {
|
|
|
5370 case 2:
|
|
|
5371 Dynarr_add (dst, c & charmask);
|
|
|
5372 break;
|
|
|
5373 case 3:
|
|
|
5374 if (XCHARSET_PRIVATE_P (charset))
|
|
|
5375 {
|
|
|
5376 Dynarr_add (dst, c & charmask);
|
|
|
5377 ch = 0;
|
|
|
5378 }
|
|
|
5379 else if (ch)
|
|
|
5380 {
|
|
396
|
5381 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
5382 if (EQ (charset, Vcharset_composite))
|
|
|
5383 {
|
|
|
5384 if (in_composite)
|
|
|
5385 {
|
|
|
5386 /* #### Bother! We don't know how to
|
|
|
5387 handle this yet. */
|
|
|
5388 Dynarr_add (dst, '~');
|
|
|
5389 }
|
|
|
5390 else
|
|
|
5391 {
|
|
|
5392 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
5393 ch & 0x7F, c & 0x7F);
|
|
|
5394 Lisp_Object lstr = composite_char_string (emch);
|
|
|
5395 saved_n = n;
|
|
|
5396 saved_src = src;
|
|
|
5397 in_composite = 1;
|
|
|
5398 src = XSTRING_DATA (lstr);
|
|
|
5399 n = XSTRING_LENGTH (lstr);
|
|
|
5400 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5401 Dynarr_add (dst, '0'); /* start composing */
|
|
|
5402 }
|
|
|
5403 }
|
|
|
5404 else
|
|
396
|
5405 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
5406 {
|
|
|
5407 Dynarr_add (dst, ch & charmask);
|
|
|
5408 Dynarr_add (dst, c & charmask);
|
|
|
5409 }
|
|
|
5410 ch = 0;
|
|
|
5411 }
|
|
|
5412 else
|
|
|
5413 {
|
|
|
5414 ch = c;
|
|
|
5415 char_boundary = 0;
|
|
|
5416 }
|
|
|
5417 break;
|
|
|
5418 case 4:
|
|
|
5419 if (ch)
|
|
|
5420 {
|
|
|
5421 Dynarr_add (dst, ch & charmask);
|
|
|
5422 Dynarr_add (dst, c & charmask);
|
|
|
5423 ch = 0;
|
|
|
5424 }
|
|
|
5425 else
|
|
|
5426 {
|
|
|
5427 ch = c;
|
|
|
5428 char_boundary = 0;
|
|
|
5429 }
|
|
|
5430 break;
|
|
|
5431 default:
|
|
|
5432 abort ();
|
|
|
5433 }
|
|
|
5434 }
|
|
|
5435 }
|
|
|
5436 }
|
|
|
5437
|
|
396
|
5438 #ifdef ENABLE_COMPOSITE_CHARS
|
|
259
|
5439 if (in_composite)
|
|
|
5440 {
|
|
|
5441 n = saved_n;
|
|
|
5442 src = saved_src;
|
|
|
5443 in_composite = 0;
|
|
|
5444 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5445 Dynarr_add (dst, '1'); /* end composing */
|
|
|
5446 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
5447 }
|
|
396
|
5448 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
259
|
5449
|
|
|
5450 if (char_boundary && flags & CODING_STATE_END)
|
|
|
5451 {
|
|
|
5452 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5453 ensure_normal_shift (str, dst);
|
|
|
5454 for (i = 0; i < 4; i++)
|
|
|
5455 {
|
|
|
5456 Lisp_Object initial_charset =
|
|
|
5457 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
5458 iso2022_designate (initial_charset, i, str, dst);
|
|
|
5459 }
|
|
|
5460 }
|
|
|
5461
|
|
396
|
5462 str->flags = flags;
|
|
|
5463 str->ch = ch;
|
|
259
|
5464 str->iso2022.current_char_boundary = char_boundary;
|
|
|
5465 str->iso2022.current_charset = charset;
|
|
|
5466 str->iso2022.current_half = half;
|
|
|
5467
|
|
|
5468 /* Verbum caro factum est! */
|
|
|
5469 }
|
|
|
5470 #endif /* MULE */
|
|
|
5471
|
|
|
5472 /************************************************************************/
|
|
|
5473 /* No-conversion methods */
|
|
|
5474 /************************************************************************/
|
|
|
5475
|
|
|
5476 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
5477 contain all 256 possible byte values and that are not to be
|
|
|
5478 interpreted as being in any particular decoding. */
|
|
|
5479 static void
|
|
398
|
5480 decode_coding_no_conversion (Lstream *decoding, const unsigned char *src,
|
|
259
|
5481 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5482 {
|
|
|
5483 unsigned char c;
|
|
|
5484 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
396
|
5485 unsigned int flags = str->flags;
|
|
|
5486 unsigned int ch = str->ch;
|
|
|
5487 eol_type_t eol_type = str->eol_type;
|
|
259
|
5488
|
|
|
5489 while (n--)
|
|
|
5490 {
|
|
|
5491 c = *src++;
|
|
|
5492
|
|
|
5493 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
5494 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
5495 label_continue_loop:;
|
|
|
5496 }
|
|
|
5497
|
|
|
5498 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
5499
|
|
396
|
5500 str->flags = flags;
|
|
|
5501 str->ch = ch;
|
|
259
|
5502 }
|
|
|
5503
|
|
|
5504 static void
|
|
398
|
5505 encode_coding_no_conversion (Lstream *encoding, const unsigned char *src,
|
|
259
|
5506 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5507 {
|
|
|
5508 unsigned char c;
|
|
|
5509 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
396
|
5510 unsigned int flags = str->flags;
|
|
|
5511 unsigned int ch = str->ch;
|
|
|
5512 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
259
|
5513
|
|
|
5514 while (n--)
|
|
|
5515 {
|
|
|
5516 c = *src++;
|
|
|
5517 if (c == '\n')
|
|
|
5518 {
|
|
|
5519 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
5520 Dynarr_add (dst, '\r');
|
|
|
5521 if (eol_type != EOL_CR)
|
|
|
5522 Dynarr_add (dst, '\n');
|
|
|
5523 ch = 0;
|
|
|
5524 }
|
|
|
5525 else if (BYTE_ASCII_P (c))
|
|
|
5526 {
|
|
|
5527 assert (ch == 0);
|
|
|
5528 Dynarr_add (dst, c);
|
|
|
5529 }
|
|
|
5530 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
5531 {
|
|
|
5532 assert (ch == 0);
|
|
|
5533 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
5534 c == LEADING_BYTE_CONTROL_1)
|
|
|
5535 ch = c;
|
|
|
5536 else
|
|
|
5537 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
5538 }
|
|
|
5539 else
|
|
|
5540 {
|
|
|
5541 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
|
5542 Dynarr_add (dst, c);
|
|
|
5543 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
5544 {
|
|
|
5545 assert (c < 0xC0);
|
|
|
5546 Dynarr_add (dst, c - 0x20);
|
|
|
5547 }
|
|
|
5548 /* else it should be the second or third byte of an
|
|
|
5549 untranslatable character, so ignore it */
|
|
|
5550 ch = 0;
|
|
|
5551 }
|
|
|
5552 }
|
|
|
5553
|
|
396
|
5554 str->flags = flags;
|
|
|
5555 str->ch = ch;
|
|
259
|
5556 }
|
|
|
5557
|
|
|
5558
|
|
398
|
5559
|
|
259
|
5560 /************************************************************************/
|
|
|
5561 /* Initialization */
|
|
|
5562 /************************************************************************/
|
|
|
5563
|
|
|
5564 void
|
|
398
|
5565 syms_of_file_coding (void)
|
|
259
|
5566 {
|
|
400
|
5567 INIT_LRECORD_IMPLEMENTATION (coding_system);
|
|
|
5568
|
|
259
|
5569 deferror (&Qcoding_system_error, "coding-system-error",
|
|
|
5570 "Coding-system error", Qio_error);
|
|
|
5571
|
|
|
5572 DEFSUBR (Fcoding_system_p);
|
|
|
5573 DEFSUBR (Ffind_coding_system);
|
|
|
5574 DEFSUBR (Fget_coding_system);
|
|
|
5575 DEFSUBR (Fcoding_system_list);
|
|
|
5576 DEFSUBR (Fcoding_system_name);
|
|
|
5577 DEFSUBR (Fmake_coding_system);
|
|
|
5578 DEFSUBR (Fcopy_coding_system);
|
|
398
|
5579 DEFSUBR (Fcoding_system_canonical_name_p);
|
|
|
5580 DEFSUBR (Fcoding_system_alias_p);
|
|
|
5581 DEFSUBR (Fcoding_system_aliasee);
|
|
|
5582 DEFSUBR (Fdefine_coding_system_alias);
|
|
259
|
5583 DEFSUBR (Fsubsidiary_coding_system);
|
|
|
5584
|
|
|
5585 DEFSUBR (Fcoding_system_type);
|
|
|
5586 DEFSUBR (Fcoding_system_doc_string);
|
|
|
5587 #ifdef MULE
|
|
|
5588 DEFSUBR (Fcoding_system_charset);
|
|
|
5589 #endif
|
|
|
5590 DEFSUBR (Fcoding_system_property);
|
|
|
5591
|
|
|
5592 DEFSUBR (Fcoding_category_list);
|
|
|
5593 DEFSUBR (Fset_coding_priority_list);
|
|
|
5594 DEFSUBR (Fcoding_priority_list);
|
|
|
5595 DEFSUBR (Fset_coding_category_system);
|
|
|
5596 DEFSUBR (Fcoding_category_system);
|
|
|
5597
|
|
|
5598 DEFSUBR (Fdetect_coding_region);
|
|
|
5599 DEFSUBR (Fdecode_coding_region);
|
|
|
5600 DEFSUBR (Fencode_coding_region);
|
|
|
5601 #ifdef MULE
|
|
|
5602 DEFSUBR (Fdecode_shift_jis_char);
|
|
|
5603 DEFSUBR (Fencode_shift_jis_char);
|
|
|
5604 DEFSUBR (Fdecode_big5_char);
|
|
|
5605 DEFSUBR (Fencode_big5_char);
|
|
396
|
5606 DEFSUBR (Fset_ucs_char);
|
|
|
5607 DEFSUBR (Fucs_char);
|
|
|
5608 DEFSUBR (Fset_char_ucs);
|
|
|
5609 DEFSUBR (Fchar_ucs);
|
|
259
|
5610 #endif /* MULE */
|
|
398
|
5611 defsymbol (&Qcoding_systemp, "coding-system-p");
|
|
259
|
5612 defsymbol (&Qno_conversion, "no-conversion");
|
|
398
|
5613 defsymbol (&Qraw_text, "raw-text");
|
|
259
|
5614 #ifdef MULE
|
|
|
5615 defsymbol (&Qbig5, "big5");
|
|
|
5616 defsymbol (&Qshift_jis, "shift-jis");
|
|
396
|
5617 defsymbol (&Qucs4, "ucs-4");
|
|
|
5618 defsymbol (&Qutf8, "utf-8");
|
|
259
|
5619 defsymbol (&Qccl, "ccl");
|
|
|
5620 defsymbol (&Qiso2022, "iso2022");
|
|
|
5621 #endif /* MULE */
|
|
|
5622 defsymbol (&Qmnemonic, "mnemonic");
|
|
|
5623 defsymbol (&Qeol_type, "eol-type");
|
|
|
5624 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
|
5625 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
|
5626
|
|
|
5627 defsymbol (&Qcr, "cr");
|
|
|
5628 defsymbol (&Qlf, "lf");
|
|
|
5629 defsymbol (&Qcrlf, "crlf");
|
|
|
5630 defsymbol (&Qeol_cr, "eol-cr");
|
|
|
5631 defsymbol (&Qeol_lf, "eol-lf");
|
|
|
5632 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
|
5633 #ifdef MULE
|
|
|
5634 defsymbol (&Qcharset_g0, "charset-g0");
|
|
|
5635 defsymbol (&Qcharset_g1, "charset-g1");
|
|
|
5636 defsymbol (&Qcharset_g2, "charset-g2");
|
|
|
5637 defsymbol (&Qcharset_g3, "charset-g3");
|
|
|
5638 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
|
5639 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
|
5640 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
|
5641 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
|
5642 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
|
5643 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
|
5644 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
|
272
|
5645
|
|
259
|
5646 defsymbol (&Qshort, "short");
|
|
|
5647 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
|
5648 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
|
5649 defsymbol (&Qseven, "seven");
|
|
|
5650 defsymbol (&Qlock_shift, "lock-shift");
|
|
|
5651 defsymbol (&Qescape_quoted, "escape-quoted");
|
|
272
|
5652 #endif /* MULE */
|
|
259
|
5653 defsymbol (&Qencode, "encode");
|
|
|
5654 defsymbol (&Qdecode, "decode");
|
|
|
5655
|
|
|
5656 #ifdef MULE
|
|
|
5657 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
|
5658 "shift-jis");
|
|
|
5659 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
|
5660 "big5");
|
|
396
|
5661 defsymbol (&coding_category_symbol[CODING_CATEGORY_UCS4],
|
|
|
5662 "ucs-4");
|
|
|
5663 defsymbol (&coding_category_symbol[CODING_CATEGORY_UTF8],
|
|
|
5664 "utf-8");
|
|
259
|
5665 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
|
5666 "iso-7");
|
|
|
5667 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
|
5668 "iso-8-designate");
|
|
|
5669 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
|
5670 "iso-8-1");
|
|
|
5671 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
|
5672 "iso-8-2");
|
|
|
5673 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
|
5674 "iso-lock-shift");
|
|
272
|
5675 #endif /* MULE */
|
|
259
|
5676 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
|
5677 "no-conversion");
|
|
|
5678 }
|
|
|
5679
|
|
|
5680 void
|
|
398
|
5681 lstream_type_create_file_coding (void)
|
|
259
|
5682 {
|
|
|
5683 LSTREAM_HAS_METHOD (decoding, reader);
|
|
|
5684 LSTREAM_HAS_METHOD (decoding, writer);
|
|
|
5685 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
|
5686 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
|
5687 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
|
5688 LSTREAM_HAS_METHOD (decoding, closer);
|
|
|
5689 LSTREAM_HAS_METHOD (decoding, marker);
|
|
|
5690
|
|
|
5691 LSTREAM_HAS_METHOD (encoding, reader);
|
|
|
5692 LSTREAM_HAS_METHOD (encoding, writer);
|
|
|
5693 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
|
5694 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
|
5695 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
|
5696 LSTREAM_HAS_METHOD (encoding, closer);
|
|
|
5697 LSTREAM_HAS_METHOD (encoding, marker);
|
|
|
5698 }
|
|
|
5699
|
|
|
5700 void
|
|
398
|
5701 vars_of_file_coding (void)
|
|
259
|
5702 {
|
|
|
5703 int i;
|
|
|
5704
|
|
398
|
5705 fcd = xnew (struct file_coding_dump);
|
|
|
5706 dumpstruct (&fcd, &fcd_description);
|
|
|
5707
|
|
259
|
5708 /* Initialize to something reasonable ... */
|
|
|
5709 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
5710 {
|
|
398
|
5711 fcd->coding_category_system[i] = Qnil;
|
|
|
5712 fcd->coding_category_by_priority[i] = i;
|
|
259
|
5713 }
|
|
|
5714
|
|
|
5715 Fprovide (intern ("file-coding"));
|
|
|
5716
|
|
|
5717 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
5718 Coding system used for TTY keyboard input.
|
|
|
5719 Not used under a windowing system.
|
|
|
5720 */ );
|
|
|
5721 Vkeyboard_coding_system = Qnil;
|
|
|
5722
|
|
|
5723 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
5724 Coding system used for TTY display output.
|
|
|
5725 Not used under a windowing system.
|
|
|
5726 */ );
|
|
|
5727 Vterminal_coding_system = Qnil;
|
|
|
5728
|
|
|
5729 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
398
|
5730 Overriding coding system used when reading from a file or process.
|
|
|
5731 You should bind this variable with `let', but do not set it globally.
|
|
|
5732 If this is non-nil, it specifies the coding system that will be used
|
|
|
5733 to decode input on read operations, such as from a file or process.
|
|
|
5734 It overrides `buffer-file-coding-system-for-read',
|
|
259
|
5735 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
398
|
5736 this one for permanent changes to the environment. */ );
|
|
259
|
5737 Vcoding_system_for_read = Qnil;
|
|
|
5738
|
|
|
5739 DEFVAR_LISP ("coding-system-for-write",
|
|
|
5740 &Vcoding_system_for_write /*
|
|
398
|
5741 Overriding coding system used when writing to a file or process.
|
|
|
5742 You should bind this variable with `let', but do not set it globally.
|
|
|
5743 If this is non-nil, it specifies the coding system that will be used
|
|
|
5744 to encode output for write operations, such as to a file or process.
|
|
|
5745 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
|
|
|
5746 Use those variables instead of this one for permanent changes to the
|
|
|
5747 environment. */ );
|
|
259
|
5748 Vcoding_system_for_write = Qnil;
|
|
|
5749
|
|
|
5750 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
|
5751 Coding system used to convert pathnames when accessing files.
|
|
|
5752 */ );
|
|
|
5753 Vfile_name_coding_system = Qnil;
|
|
|
5754
|
|
|
5755 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
|
5756 Non-nil means the buffer contents are regarded as multi-byte form
|
|
|
5757 of characters, not a binary code. This affects the display, file I/O,
|
|
|
5758 and behaviors of various editing commands.
|
|
|
5759
|
|
|
5760 Setting this to nil does not do anything.
|
|
|
5761 */ );
|
|
|
5762 enable_multibyte_characters = 1;
|
|
|
5763 }
|
|
|
5764
|
|
|
5765 void
|
|
398
|
5766 complex_vars_of_file_coding (void)
|
|
259
|
5767 {
|
|
380
|
5768 staticpro (&Vcoding_system_hash_table);
|
|
|
5769 Vcoding_system_hash_table =
|
|
|
5770 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
259
|
5771
|
|
|
5772 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
|
|
398
|
5773 dumpstruct (&the_codesys_prop_dynarr, &codesys_prop_dynarr_description);
|
|
259
|
5774
|
|
|
5775 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
|
5776 { \
|
|
|
5777 struct codesys_prop csp; \
|
|
|
5778 csp.sym = (Sym); \
|
|
|
5779 csp.prop_type = (Prop_Type); \
|
|
|
5780 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
|
5781 } while (0)
|
|
|
5782
|
|
|
5783 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
|
5784 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
|
5785 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
|
5786 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
|
5787 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
|
5788 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
|
5789 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
|
5790 #ifdef MULE
|
|
|
5791 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
|
5792 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
|
5793 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
|
5794 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
|
5795 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
|
5796 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
|
5797 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
|
5798 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
|
5799 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
|
5800 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
|
5801 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
|
5802 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
|
5803 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
|
5804 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
|
5805 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
|
5806 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
|
5807 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
|
5808
|
|
|
5809 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
|
5810 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
|
5811 #endif /* MULE */
|
|
|
5812 /* Need to create this here or we're really screwed. */
|
|
398
|
5813 Fmake_coding_system
|
|
|
5814 (Qraw_text, Qno_conversion,
|
|
|
5815 build_string ("Raw text, which means it converts only line-break-codes."),
|
|
|
5816 list2 (Qmnemonic, build_string ("Raw")));
|
|
|
5817
|
|
|
5818 Fmake_coding_system
|
|
|
5819 (Qbinary, Qno_conversion,
|
|
|
5820 build_string ("Binary, which means it does not convert anything."),
|
|
|
5821 list4 (Qeol_type, Qlf,
|
|
|
5822 Qmnemonic, build_string ("Binary")));
|
|
|
5823
|
|
|
5824 Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
|
|
|
5825
|
|
|
5826 Fdefine_coding_system_alias (Qfile_name, Qbinary);
|
|
|
5827
|
|
|
5828 Fdefine_coding_system_alias (Qterminal, Qbinary);
|
|
|
5829 Fdefine_coding_system_alias (Qkeyboard, Qbinary);
|
|
259
|
5830
|
|
|
5831 /* Need this for bootstrapping */
|
|
398
|
5832 fcd->coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
|
|
5833 Fget_coding_system (Qraw_text);
|
|
396
|
5834
|
|
|
5835 #ifdef MULE
|
|
|
5836 {
|
|
|
5837 unsigned int i;
|
|
|
5838
|
|
|
5839 for (i = 0; i < 65536; i++)
|
|
398
|
5840 fcd->ucs_to_mule_table[i] = Qnil;
|
|
396
|
5841 }
|
|
|
5842 staticpro (&mule_to_ucs_table);
|
|
|
5843 mule_to_ucs_table = Fmake_char_table(Qgeneric);
|
|
|
5844 #endif /* MULE */
|
|
259
|
5845 }
|
