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