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428
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1 /* Code conversion functions.
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2 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.3. Not in FSF. */
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23
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24 /* Rewritten by Ben Wing <ben@xemacs.org>. */
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25
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26 #include <config.h>
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27 #include "lisp.h"
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28
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29 #include "buffer.h"
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30 #include "elhash.h"
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31 #include "insdel.h"
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32 #include "lstream.h"
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33 #ifdef MULE
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34 #include "mule-ccl.h"
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35 #include "chartab.h"
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36 #endif
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37 #include "file-coding.h"
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38
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39 Lisp_Object Qcoding_system_error;
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40
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41 Lisp_Object Vkeyboard_coding_system;
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42 Lisp_Object Vterminal_coding_system;
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43 Lisp_Object Vcoding_system_for_read;
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44 Lisp_Object Vcoding_system_for_write;
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45 Lisp_Object Vfile_name_coding_system;
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46
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47 /* Table of symbols identifying each coding category. */
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48 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST + 1];
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49
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50
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51
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52 struct file_coding_dump {
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53 /* Coding system currently associated with each coding category. */
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54 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
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55
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56 /* Table of all coding categories in decreasing order of priority.
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57 This describes a permutation of the possible coding categories. */
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58 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
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59
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60 Lisp_Object ucs_to_mule_table[65536];
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61 } *fcd;
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62
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63 static const struct lrecord_description fcd_description_1[] = {
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64 { XD_LISP_OBJECT, offsetof(struct file_coding_dump, coding_category_system), CODING_CATEGORY_LAST + 1 },
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65 { XD_LISP_OBJECT, offsetof(struct file_coding_dump, ucs_to_mule_table), 65536 },
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66 { XD_END }
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67 };
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68
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69 static const struct struct_description fcd_description = {
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70 sizeof(struct file_coding_dump),
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71 fcd_description_1
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72 };
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73
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74 Lisp_Object mule_to_ucs_table;
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75
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76 Lisp_Object Qcoding_systemp;
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77
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78 Lisp_Object Qraw_text, Qno_conversion, Qccl, Qiso2022;
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79 /* Qinternal in general.c */
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80
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81 Lisp_Object Qmnemonic, Qeol_type;
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82 Lisp_Object Qcr, Qcrlf, Qlf;
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83 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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84 Lisp_Object Qpost_read_conversion;
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85 Lisp_Object Qpre_write_conversion;
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86
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87 #ifdef MULE
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88 Lisp_Object Qucs4, Qutf8;
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89 Lisp_Object Qbig5, Qshift_jis;
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90 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
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91 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
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92 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
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93 Lisp_Object Qno_iso6429;
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94 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
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95 Lisp_Object Qctext, Qescape_quoted;
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96 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
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97 #endif
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98 Lisp_Object Qencode, Qdecode;
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99
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100 Lisp_Object Vcoding_system_hash_table;
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101
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102 int enable_multibyte_characters;
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103
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104 #ifdef MULE
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105 /* Additional information used by the ISO2022 decoder and detector. */
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106 struct iso2022_decoder
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107 {
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108 /* CHARSET holds the character sets currently assigned to the G0
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109 through G3 variables. It is initialized from the array
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110 INITIAL_CHARSET in CODESYS. */
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111 Lisp_Object charset[4];
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112
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113 /* Which registers are currently invoked into the left (GL) and
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114 right (GR) halves of the 8-bit encoding space? */
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115 int register_left, register_right;
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116
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117 /* ISO_ESC holds a value indicating part of an escape sequence
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118 that has already been seen. */
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119 enum iso_esc_flag esc;
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120
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121 /* This records the bytes we've seen so far in an escape sequence,
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122 in case the sequence is invalid (we spit out the bytes unchanged). */
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123 unsigned char esc_bytes[8];
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124
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125 /* Index for next byte to store in ISO escape sequence. */
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126 int esc_bytes_index;
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127
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128 #ifdef ENABLE_COMPOSITE_CHARS
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129 /* Stuff seen so far when composing a string. */
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130 unsigned_char_dynarr *composite_chars;
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131 #endif
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132
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133 /* If we saw an invalid designation sequence for a particular
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134 register, we flag it here and switch to ASCII. The next time we
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135 see a valid designation for this register, we turn off the flag
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136 and do the designation normally, but pretend the sequence was
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137 invalid. The effect of all this is that (most of the time) the
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138 escape sequences for both the switch to the unknown charset, and
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139 the switch back to the known charset, get inserted literally into
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140 the buffer and saved out as such. The hope is that we can
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141 preserve the escape sequences so that the resulting written out
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142 file makes sense. If we don't do any of this, the designation
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143 to the invalid charset will be preserved but that switch back
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144 to the known charset will probably get eaten because it was
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145 the same charset that was already present in the register. */
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146 unsigned char invalid_designated[4];
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147
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148 /* We try to do similar things as above for direction-switching
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149 sequences. If we encountered a direction switch while an
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150 invalid designation was present, or an invalid designation
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151 just after a direction switch (i.e. no valid designation
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152 encountered yet), we insert the direction-switch escape
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153 sequence literally into the output stream, and later on
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154 insert the corresponding direction-restoring escape sequence
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155 literally also. */
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156 unsigned int switched_dir_and_no_valid_charset_yet :1;
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157 unsigned int invalid_switch_dir :1;
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158
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159 /* Tells the decoder to output the escape sequence literally
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160 even though it was valid. Used in the games we play to
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161 avoid lossage when we encounter invalid designations. */
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162 unsigned int output_literally :1;
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163 /* We encountered a direction switch followed by an invalid
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164 designation. We didn't output the direction switch
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165 literally because we didn't know about the invalid designation;
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166 but we have to do so now. */
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167 unsigned int output_direction_sequence :1;
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168 };
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169 #endif /* MULE */
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170 EXFUN (Fcopy_coding_system, 2);
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171 #ifdef MULE
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172 struct detection_state;
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173 static int detect_coding_sjis (struct detection_state *st,
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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_sjis (Lstream *decoding,
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177 CONST unsigned char *src,
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178 unsigned_char_dynarr *dst,
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179 unsigned int n);
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180 static void encode_coding_sjis (Lstream *encoding,
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181 CONST unsigned char *src,
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182 unsigned_char_dynarr *dst,
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183 unsigned int n);
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184 static int detect_coding_big5 (struct detection_state *st,
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185 CONST unsigned char *src,
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186 unsigned int n);
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187 static void decode_coding_big5 (Lstream *decoding,
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188 CONST unsigned char *src,
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189 unsigned_char_dynarr *dst, unsigned int n);
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190 static void encode_coding_big5 (Lstream *encoding,
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191 CONST unsigned char *src,
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192 unsigned_char_dynarr *dst, unsigned int n);
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193 static int detect_coding_ucs4 (struct detection_state *st,
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194 CONST unsigned char *src,
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195 unsigned int n);
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196 static void decode_coding_ucs4 (Lstream *decoding,
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197 CONST unsigned char *src,
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198 unsigned_char_dynarr *dst, unsigned int n);
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199 static void encode_coding_ucs4 (Lstream *encoding,
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200 CONST unsigned char *src,
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201 unsigned_char_dynarr *dst, unsigned int n);
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202 static int detect_coding_utf8 (struct detection_state *st,
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203 CONST unsigned char *src,
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204 unsigned int n);
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205 static void decode_coding_utf8 (Lstream *decoding,
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206 CONST unsigned char *src,
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207 unsigned_char_dynarr *dst, unsigned int n);
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208 static void encode_coding_utf8 (Lstream *encoding,
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209 CONST unsigned char *src,
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210 unsigned_char_dynarr *dst, unsigned int n);
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211 static int postprocess_iso2022_mask (int mask);
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212 static void reset_iso2022 (Lisp_Object coding_system,
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213 struct iso2022_decoder *iso);
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214 static int detect_coding_iso2022 (struct detection_state *st,
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215 CONST unsigned char *src,
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216 unsigned int n);
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217 static void decode_coding_iso2022 (Lstream *decoding,
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218 CONST unsigned char *src,
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219 unsigned_char_dynarr *dst, unsigned int n);
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220 static void encode_coding_iso2022 (Lstream *encoding,
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221 CONST unsigned char *src,
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222 unsigned_char_dynarr *dst, unsigned int n);
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223 #endif /* MULE */
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224 static void decode_coding_no_conversion (Lstream *decoding,
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225 CONST unsigned char *src,
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226 unsigned_char_dynarr *dst,
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227 unsigned int n);
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228 static void encode_coding_no_conversion (Lstream *encoding,
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229 CONST unsigned char *src,
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230 unsigned_char_dynarr *dst,
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231 unsigned int n);
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232 static void mule_decode (Lstream *decoding, CONST unsigned char *src,
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233 unsigned_char_dynarr *dst, unsigned int n);
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234 static void mule_encode (Lstream *encoding, CONST unsigned char *src,
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235 unsigned_char_dynarr *dst, unsigned int n);
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236
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237 typedef struct codesys_prop codesys_prop;
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238 struct codesys_prop
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239 {
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240 Lisp_Object sym;
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241 int prop_type;
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242 };
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243
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244 typedef struct
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245 {
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246 Dynarr_declare (codesys_prop);
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247 } codesys_prop_dynarr;
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248
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249 static const struct lrecord_description codesys_prop_description_1[] = {
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250 { XD_LISP_OBJECT, offsetof(codesys_prop, sym), 1 },
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251 { XD_END }
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252 };
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253
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254 static const struct struct_description codesys_prop_description = {
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255 sizeof(codesys_prop),
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256 codesys_prop_description_1
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257 };
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258
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259 static const struct lrecord_description codesys_prop_dynarr_description_1[] = {
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260 XD_DYNARR_DESC(codesys_prop_dynarr, &codesys_prop_description),
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261 { XD_END }
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262 };
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263
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264 static const struct struct_description codesys_prop_dynarr_description = {
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265 sizeof(codesys_prop_dynarr),
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266 codesys_prop_dynarr_description_1
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267 };
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268
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269 codesys_prop_dynarr *the_codesys_prop_dynarr;
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270
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271 enum codesys_prop_enum
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272 {
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273 CODESYS_PROP_ALL_OK,
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274 CODESYS_PROP_ISO2022,
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275 CODESYS_PROP_CCL
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276 };
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277
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278
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279 /************************************************************************/
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280 /* Coding system functions */
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281 /************************************************************************/
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282
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283 static Lisp_Object mark_coding_system (Lisp_Object);
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284 static void print_coding_system (Lisp_Object, Lisp_Object, int);
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285 static void finalize_coding_system (void *header, int for_disksave);
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286
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287 #ifdef MULE
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288 static const struct lrecord_description ccs_description_1[] = {
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289 { XD_LISP_OBJECT, offsetof(charset_conversion_spec, from_charset), 2 },
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290 { XD_END }
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291 };
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292
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293 static const struct struct_description ccs_description = {
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294 sizeof(charset_conversion_spec),
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295 ccs_description_1
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296 };
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297
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298 static const struct lrecord_description ccsd_description_1[] = {
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299 XD_DYNARR_DESC(charset_conversion_spec_dynarr, &ccs_description),
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300 { XD_END }
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301 };
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302
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303 static const struct struct_description ccsd_description = {
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304 sizeof(charset_conversion_spec_dynarr),
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305 ccsd_description_1
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306 };
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307 #endif
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308
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309 static const struct lrecord_description coding_system_description[] = {
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310 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, name), 2 },
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311 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, mnemonic), 3 },
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312 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, eol_lf), 3 },
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313 #ifdef MULE
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314 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, iso2022.initial_charset), 4 },
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315 { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
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316 { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
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317 { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, ccl.decode), 2 },
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318 #endif
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319 { XD_END }
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320 };
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321
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322 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
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323 mark_coding_system, print_coding_system,
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324 finalize_coding_system,
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325 0, 0, coding_system_description,
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326 struct Lisp_Coding_System);
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327
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328 static Lisp_Object
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329 mark_coding_system (Lisp_Object obj)
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330 {
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331 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
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332
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333 mark_object (CODING_SYSTEM_NAME (codesys));
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334 mark_object (CODING_SYSTEM_DOC_STRING (codesys));
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335 mark_object (CODING_SYSTEM_MNEMONIC (codesys));
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336 mark_object (CODING_SYSTEM_EOL_LF (codesys));
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337 mark_object (CODING_SYSTEM_EOL_CRLF (codesys));
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338 mark_object (CODING_SYSTEM_EOL_CR (codesys));
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339
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340 switch (CODING_SYSTEM_TYPE (codesys))
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341 {
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342 #ifdef MULE
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343 int i;
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344 case CODESYS_ISO2022:
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345 for (i = 0; i < 4; i++)
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346 mark_object (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
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347 if (codesys->iso2022.input_conv)
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348 {
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349 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
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350 {
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351 struct charset_conversion_spec *ccs =
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352 Dynarr_atp (codesys->iso2022.input_conv, i);
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353 mark_object (ccs->from_charset);
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354 mark_object (ccs->to_charset);
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355 }
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356 }
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357 if (codesys->iso2022.output_conv)
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358 {
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359 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
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360 {
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361 struct charset_conversion_spec *ccs =
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362 Dynarr_atp (codesys->iso2022.output_conv, i);
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363 mark_object (ccs->from_charset);
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364 mark_object (ccs->to_charset);
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365 }
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366 }
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367 break;
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368
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369 case CODESYS_CCL:
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370 mark_object (CODING_SYSTEM_CCL_DECODE (codesys));
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371 mark_object (CODING_SYSTEM_CCL_ENCODE (codesys));
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372 break;
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373 #endif /* MULE */
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374 default:
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375 break;
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376 }
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377
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378 mark_object (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
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379 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
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380 }
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381
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382 static void
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383 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
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|
|
384 int escapeflag)
|
|
|
385 {
|
|
|
386 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
|
387 if (print_readably)
|
|
|
388 error ("printing unreadable object #<coding_system 0x%x>",
|
|
|
389 c->header.uid);
|
|
|
390
|
|
|
391 write_c_string ("#<coding_system ", printcharfun);
|
|
|
392 print_internal (c->name, printcharfun, 1);
|
|
|
393 write_c_string (">", printcharfun);
|
|
|
394 }
|
|
|
395
|
|
|
396 static void
|
|
|
397 finalize_coding_system (void *header, int for_disksave)
|
|
|
398 {
|
|
|
399 Lisp_Coding_System *c = (Lisp_Coding_System *) header;
|
|
|
400 /* Since coding systems never go away, this function is not
|
|
|
401 necessary. But it would be necessary if we changed things
|
|
|
402 so that coding systems could go away. */
|
|
|
403 if (!for_disksave) /* see comment in lstream.c */
|
|
|
404 {
|
|
|
405 switch (CODING_SYSTEM_TYPE (c))
|
|
|
406 {
|
|
|
407 #ifdef MULE
|
|
|
408 case CODESYS_ISO2022:
|
|
|
409 if (c->iso2022.input_conv)
|
|
|
410 {
|
|
|
411 Dynarr_free (c->iso2022.input_conv);
|
|
|
412 c->iso2022.input_conv = 0;
|
|
|
413 }
|
|
|
414 if (c->iso2022.output_conv)
|
|
|
415 {
|
|
|
416 Dynarr_free (c->iso2022.output_conv);
|
|
|
417 c->iso2022.output_conv = 0;
|
|
|
418 }
|
|
|
419 break;
|
|
|
420 #endif /* MULE */
|
|
|
421 default:
|
|
|
422 break;
|
|
|
423 }
|
|
|
424 }
|
|
|
425 }
|
|
|
426
|
|
|
427 static enum eol_type
|
|
|
428 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
429 {
|
|
|
430 CHECK_SYMBOL (symbol);
|
|
|
431 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
432 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
433 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
434 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
435
|
|
|
436 signal_simple_error ("Unrecognized eol type", symbol);
|
|
|
437 return EOL_AUTODETECT; /* not reached */
|
|
|
438 }
|
|
|
439
|
|
|
440 static Lisp_Object
|
|
|
441 eol_type_to_symbol (enum eol_type type)
|
|
|
442 {
|
|
|
443 switch (type)
|
|
|
444 {
|
|
|
445 default: abort ();
|
|
|
446 case EOL_LF: return Qlf;
|
|
|
447 case EOL_CRLF: return Qcrlf;
|
|
|
448 case EOL_CR: return Qcr;
|
|
|
449 case EOL_AUTODETECT: return Qnil;
|
|
|
450 }
|
|
|
451 }
|
|
|
452
|
|
|
453 static void
|
|
|
454 setup_eol_coding_systems (Lisp_Coding_System *codesys)
|
|
|
455 {
|
|
|
456 Lisp_Object codesys_obj;
|
|
|
457 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
|
|
|
458 char *codesys_name = (char *) alloca (len + 7);
|
|
|
459 int mlen = -1;
|
|
|
460 char *codesys_mnemonic=0;
|
|
|
461
|
|
|
462 Lisp_Object codesys_name_sym, sub_codesys_obj;
|
|
|
463
|
|
|
464 /* kludge */
|
|
|
465
|
|
|
466 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
467
|
|
|
468 memcpy (codesys_name,
|
|
|
469 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
|
|
|
470
|
|
|
471 if (STRINGP (CODING_SYSTEM_MNEMONIC (codesys)))
|
|
|
472 {
|
|
|
473 mlen = XSTRING_LENGTH (CODING_SYSTEM_MNEMONIC (codesys));
|
|
|
474 codesys_mnemonic = (char *) alloca (mlen + 7);
|
|
|
475 memcpy (codesys_mnemonic,
|
|
|
476 XSTRING_DATA (CODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
|
477 }
|
|
|
478
|
|
|
479 #define DEFINE_SUB_CODESYS(op_sys, op_sys_abbr, Type) do { \
|
|
|
480 strcpy (codesys_name + len, "-" op_sys); \
|
|
|
481 if (mlen != -1) \
|
|
|
482 strcpy (codesys_mnemonic + mlen, op_sys_abbr); \
|
|
|
483 codesys_name_sym = intern (codesys_name); \
|
|
|
484 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
|
|
|
485 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
|
|
|
486 if (mlen != -1) \
|
|
|
487 XCODING_SYSTEM_MNEMONIC(sub_codesys_obj) = \
|
|
|
488 build_string (codesys_mnemonic); \
|
|
|
489 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
|
|
|
490 } while (0)
|
|
|
491
|
|
|
492 DEFINE_SUB_CODESYS("unix", "", EOL_LF);
|
|
|
493 DEFINE_SUB_CODESYS("dos", ":T", EOL_CRLF);
|
|
|
494 DEFINE_SUB_CODESYS("mac", ":t", EOL_CR);
|
|
|
495 }
|
|
|
496
|
|
|
497 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
|
498 Return t if OBJECT is a coding system.
|
|
|
499 A coding system is an object that defines how text containing multiple
|
|
|
500 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
501 The coding system is used to decode the stream into a series of
|
|
|
502 characters (which may be from multiple charsets) when the text is read
|
|
|
503 from a file or process, and is used to encode the text back into the
|
|
|
504 same format when it is written out to a file or process.
|
|
|
505
|
|
|
506 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
507 Text, which is used for inter-client data under the X Window System)
|
|
|
508 use escape sequences to switch between different charsets -- Japanese
|
|
|
509 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
510 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
|
511 `make-coding-system' for more information.
|
|
|
512
|
|
|
513 Coding systems are normally identified using a symbol, and the
|
|
|
514 symbol is accepted in place of the actual coding system object whenever
|
|
|
515 a coding system is called for. (This is similar to how faces work.)
|
|
|
516 */
|
|
|
517 (object))
|
|
|
518 {
|
|
|
519 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
520 }
|
|
|
521
|
|
|
522 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
523 Retrieve the coding system of the given name.
|
|
|
524
|
|
|
525 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
526 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
527 If there is no such coding system, nil is returned. Otherwise the
|
|
|
528 associated coding system object is returned.
|
|
|
529 */
|
|
|
530 (coding_system_or_name))
|
|
|
531 {
|
|
|
532 if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
533 return coding_system_or_name;
|
|
|
534
|
|
|
535 if (NILP (coding_system_or_name))
|
|
|
536 coding_system_or_name = Qbinary;
|
|
|
537 else
|
|
|
538 CHECK_SYMBOL (coding_system_or_name);
|
|
|
539
|
|
|
540 return Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
|
|
541 }
|
|
|
542
|
|
|
543 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
544 Retrieve the coding system of the given name.
|
|
|
545 Same as `find-coding-system' except that if there is no such
|
|
|
546 coding system, an error is signaled instead of returning nil.
|
|
|
547 */
|
|
|
548 (name))
|
|
|
549 {
|
|
|
550 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
551
|
|
|
552 if (NILP (coding_system))
|
|
|
553 signal_simple_error ("No such coding system", name);
|
|
|
554 return coding_system;
|
|
|
555 }
|
|
|
556
|
|
|
557 /* We store the coding systems in hash tables with the names as the key and the
|
|
|
558 actual coding system object as the value. Occasionally we need to use them
|
|
|
559 in a list format. These routines provide us with that. */
|
|
|
560 struct coding_system_list_closure
|
|
|
561 {
|
|
|
562 Lisp_Object *coding_system_list;
|
|
|
563 };
|
|
|
564
|
|
|
565 static int
|
|
|
566 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
|
|
|
567 void *coding_system_list_closure)
|
|
|
568 {
|
|
|
569 /* This function can GC */
|
|
|
570 struct coding_system_list_closure *cscl =
|
|
|
571 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
|
572 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
|
573
|
|
|
574 *coding_system_list = Fcons (XCODING_SYSTEM (value)->name,
|
|
|
575 *coding_system_list);
|
|
|
576 return 0;
|
|
|
577 }
|
|
|
578
|
|
|
579 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
|
580 Return a list of the names of all defined coding systems.
|
|
|
581 */
|
|
|
582 ())
|
|
|
583 {
|
|
|
584 Lisp_Object coding_system_list = Qnil;
|
|
|
585 struct gcpro gcpro1;
|
|
|
586 struct coding_system_list_closure coding_system_list_closure;
|
|
|
587
|
|
|
588 GCPRO1 (coding_system_list);
|
|
|
589 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
|
590 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
|
|
591 &coding_system_list_closure);
|
|
|
592 UNGCPRO;
|
|
|
593
|
|
|
594 return coding_system_list;
|
|
|
595 }
|
|
|
596
|
|
|
597 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
598 Return the name of the given coding system.
|
|
|
599 */
|
|
|
600 (coding_system))
|
|
|
601 {
|
|
|
602 coding_system = Fget_coding_system (coding_system);
|
|
|
603 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
604 }
|
|
|
605
|
|
|
606 static Lisp_Coding_System *
|
|
|
607 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
|
|
|
608 {
|
|
|
609 Lisp_Coding_System *codesys =
|
|
|
610 alloc_lcrecord_type (Lisp_Coding_System, &lrecord_coding_system);
|
|
|
611
|
|
|
612 zero_lcrecord (codesys);
|
|
|
613 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
614 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
|
615 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
|
616 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
617 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
618 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
|
619 CODING_SYSTEM_TYPE (codesys) = type;
|
|
|
620 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
|
|
|
621 #ifdef MULE
|
|
|
622 if (type == CODESYS_ISO2022)
|
|
|
623 {
|
|
|
624 int i;
|
|
|
625 for (i = 0; i < 4; i++)
|
|
|
626 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
|
627 }
|
|
|
628 else if (type == CODESYS_CCL)
|
|
|
629 {
|
|
|
630 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
|
631 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
|
632 }
|
|
|
633 #endif /* MULE */
|
|
|
634 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
635
|
|
|
636 return codesys;
|
|
|
637 }
|
|
|
638
|
|
|
639 #ifdef MULE
|
|
|
640 /* Given a list of charset conversion specs as specified in a Lisp
|
|
|
641 program, parse it into STORE_HERE. */
|
|
|
642
|
|
|
643 static void
|
|
|
644 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
|
645 Lisp_Object spec_list)
|
|
|
646 {
|
|
|
647 Lisp_Object rest;
|
|
|
648
|
|
|
649 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
|
650 {
|
|
|
651 Lisp_Object car = XCAR (rest);
|
|
|
652 Lisp_Object from, to;
|
|
|
653 struct charset_conversion_spec spec;
|
|
|
654
|
|
|
655 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
|
656 signal_simple_error ("Invalid charset conversion spec", car);
|
|
|
657 from = Fget_charset (XCAR (car));
|
|
|
658 to = Fget_charset (XCAR (XCDR (car)));
|
|
|
659 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
|
660 signal_simple_error_2
|
|
|
661 ("Attempted conversion between different charset types",
|
|
|
662 from, to);
|
|
|
663 spec.from_charset = from;
|
|
|
664 spec.to_charset = to;
|
|
|
665
|
|
|
666 Dynarr_add (store_here, spec);
|
|
|
667 }
|
|
|
668 }
|
|
|
669
|
|
|
670 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
|
671 specs, return the equivalent as the Lisp programmer would see it.
|
|
|
672
|
|
|
673 If LOAD_HERE is 0, return Qnil. */
|
|
|
674
|
|
|
675 static Lisp_Object
|
|
|
676 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
|
677 {
|
|
|
678 int i;
|
|
|
679 Lisp_Object result;
|
|
|
680
|
|
|
681 if (!load_here)
|
|
|
682 return Qnil;
|
|
|
683 for (i = 0, result = Qnil; i < Dynarr_length (load_here); i++)
|
|
|
684 {
|
|
|
685 struct charset_conversion_spec *ccs = Dynarr_atp (load_here, i);
|
|
|
686 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
|
687 }
|
|
|
688
|
|
|
689 return Fnreverse (result);
|
|
|
690 }
|
|
|
691
|
|
|
692 #endif /* MULE */
|
|
|
693
|
|
|
694 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
695 Register symbol NAME as a coding system.
|
|
|
696
|
|
|
697 TYPE describes the conversion method used and should be one of
|
|
|
698
|
|
|
699 nil or 'undecided
|
|
|
700 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
701 used in the file.
|
|
|
702 'no-conversion
|
|
|
703 No conversion. Use this for binary files and such. On output,
|
|
|
704 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
705 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
706 characters will only be present if you explicitly insert them.)
|
|
|
707 'shift-jis
|
|
|
708 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
|
709 'ucs-4
|
|
|
710 ISO 10646 UCS-4 encoding.
|
|
|
711 'utf-8
|
|
|
712 ISO 10646 UTF-8 encoding.
|
|
|
713 'iso2022
|
|
|
714 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
715 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
716 standard Unix encoding for Japanese and other languages), and
|
|
|
717 Compound Text (the encoding used in X11). You can specify more
|
|
|
718 specific information about the conversion with the FLAGS argument.
|
|
|
719 'big5
|
|
|
720 Big5 (the encoding commonly used for Taiwanese).
|
|
|
721 'ccl
|
|
|
722 The conversion is performed using a user-written pseudo-code
|
|
|
723 program. CCL (Code Conversion Language) is the name of this
|
|
|
724 pseudo-code.
|
|
|
725 'internal
|
|
|
726 Write out or read in the raw contents of the memory representing
|
|
|
727 the buffer's text. This is primarily useful for debugging
|
|
|
728 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
729 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
730 WARNING: Reading in a file using 'internal conversion can result
|
|
|
731 in an internal inconsistency in the memory representing a
|
|
|
732 buffer's text, which will produce unpredictable results and may
|
|
|
733 cause XEmacs to crash. Under normal circumstances you should
|
|
|
734 never use 'internal conversion.
|
|
|
735
|
|
|
736 DOC-STRING is a string describing the coding system.
|
|
|
737
|
|
|
738 PROPS is a property list, describing the specific nature of the
|
|
|
739 character set. Recognized properties are:
|
|
|
740
|
|
|
741 'mnemonic
|
|
|
742 String to be displayed in the modeline when this coding system is
|
|
|
743 active.
|
|
|
744
|
|
|
745 'eol-type
|
|
|
746 End-of-line conversion to be used. It should be one of
|
|
|
747
|
|
|
748 nil
|
|
|
749 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
750 or CR). Also generate subsidiary coding systems named
|
|
|
751 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
752 identical to this coding system but have an EOL-TYPE
|
|
|
753 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
754 'lf
|
|
|
755 The end of a line is marked externally using ASCII LF.
|
|
|
756 Since this is also the way that XEmacs represents an
|
|
|
757 end-of-line internally, specifying this option results
|
|
|
758 in no end-of-line conversion. This is the standard
|
|
|
759 format for Unix text files.
|
|
|
760 'crlf
|
|
|
761 The end of a line is marked externally using ASCII
|
|
|
762 CRLF. This is the standard format for MS-DOS text
|
|
|
763 files.
|
|
|
764 'cr
|
|
|
765 The end of a line is marked externally using ASCII CR.
|
|
|
766 This is the standard format for Macintosh text files.
|
|
|
767 t
|
|
|
768 Automatically detect the end-of-line type but do not
|
|
|
769 generate subsidiary coding systems. (This value is
|
|
|
770 converted to nil when stored internally, and
|
|
|
771 `coding-system-property' will return nil.)
|
|
|
772
|
|
|
773 'post-read-conversion
|
|
|
774 Function called after a file has been read in, to perform the
|
|
|
775 decoding. Called with two arguments, BEG and END, denoting
|
|
|
776 a region of the current buffer to be decoded.
|
|
|
777
|
|
|
778 'pre-write-conversion
|
|
|
779 Function called before a file is written out, to perform the
|
|
|
780 encoding. Called with two arguments, BEG and END, denoting
|
|
|
781 a region of the current buffer to be encoded.
|
|
|
782
|
|
|
783
|
|
|
784 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
785
|
|
|
786 'charset-g0
|
|
|
787 'charset-g1
|
|
|
788 'charset-g2
|
|
|
789 'charset-g3
|
|
|
790 The character set initially designated to the G0 - G3 registers.
|
|
|
791 The value should be one of
|
|
|
792
|
|
|
793 -- A charset object (designate that character set)
|
|
|
794 -- nil (do not ever use this register)
|
|
|
795 -- t (no character set is initially designated to
|
|
|
796 the register, but may be later on; this automatically
|
|
|
797 sets the corresponding `force-g*-on-output' property)
|
|
|
798
|
|
|
799 'force-g0-on-output
|
|
|
800 'force-g1-on-output
|
|
|
801 'force-g2-on-output
|
|
|
802 'force-g2-on-output
|
|
|
803 If non-nil, send an explicit designation sequence on output before
|
|
|
804 using the specified register.
|
|
|
805
|
|
|
806 'short
|
|
|
807 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
808 "ESC $ B" on output in place of the full designation sequences
|
|
|
809 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
|
810
|
|
|
811 'no-ascii-eol
|
|
|
812 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
813 Setting this to non-nil also suppresses other state-resetting that
|
|
|
814 normally happens at the end of a line.
|
|
|
815
|
|
|
816 'no-ascii-cntl
|
|
|
817 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
818
|
|
|
819 'seven
|
|
|
820 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
821 environment.
|
|
|
822
|
|
|
823 'lock-shift
|
|
|
824 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
825 or designation by escape sequence.
|
|
|
826
|
|
|
827 'no-iso6429
|
|
|
828 If non-nil, don't use ISO6429's direction specification.
|
|
|
829
|
|
|
830 'escape-quoted
|
|
|
831 If non-nil, literal control characters that are the same as
|
|
|
832 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
833 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
834 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
|
835 so that they can be properly distinguished from an escape sequence.
|
|
|
836 (Note that doing this results in a non-portable encoding.) This
|
|
|
837 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
838 is a good choice for a quoting character because there are no
|
|
|
839 escape sequences whose second byte is a character from the Control-0
|
|
|
840 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
841 ISO2022 standard.
|
|
|
842
|
|
|
843 'input-charset-conversion
|
|
|
844 A list of conversion specifications, specifying conversion of
|
|
|
845 characters in one charset to another when decoding is performed.
|
|
|
846 Each specification is a list of two elements: the source charset,
|
|
|
847 and the destination charset.
|
|
|
848
|
|
|
849 'output-charset-conversion
|
|
|
850 A list of conversion specifications, specifying conversion of
|
|
|
851 characters in one charset to another when encoding is performed.
|
|
|
852 The form of each specification is the same as for
|
|
|
853 'input-charset-conversion.
|
|
|
854
|
|
|
855
|
|
|
856 The following additional properties are recognized (and required)
|
|
|
857 if TYPE is 'ccl:
|
|
|
858
|
|
|
859 'decode
|
|
|
860 CCL program used for decoding (converting to internal format).
|
|
|
861
|
|
|
862 'encode
|
|
|
863 CCL program used for encoding (converting to external format).
|
|
|
864 */
|
|
|
865 (name, type, doc_string, props))
|
|
|
866 {
|
|
|
867 Lisp_Coding_System *codesys;
|
|
|
868 Lisp_Object rest, key, value;
|
|
|
869 enum coding_system_type ty;
|
|
|
870 int need_to_setup_eol_systems = 1;
|
|
|
871
|
|
|
872 /* Convert type to constant */
|
|
|
873 if (NILP (type) || EQ (type, Qundecided))
|
|
|
874 { ty = CODESYS_AUTODETECT; }
|
|
|
875 #ifdef MULE
|
|
|
876 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
|
877 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
|
878 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
|
|
879 else if (EQ (type, Qucs4)) { ty = CODESYS_UCS4; }
|
|
|
880 else if (EQ (type, Qutf8)) { ty = CODESYS_UTF8; }
|
|
|
881 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
|
882 #endif
|
|
|
883 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
|
884 #ifdef DEBUG_XEMACS
|
|
|
885 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
|
886 #endif
|
|
|
887 else
|
|
|
888 signal_simple_error ("Invalid coding system type", type);
|
|
|
889
|
|
|
890 CHECK_SYMBOL (name);
|
|
|
891
|
|
|
892 codesys = allocate_coding_system (ty, name);
|
|
|
893
|
|
|
894 if (NILP (doc_string))
|
|
|
895 doc_string = build_string ("");
|
|
|
896 else
|
|
|
897 CHECK_STRING (doc_string);
|
|
|
898 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
|
899
|
|
|
900 EXTERNAL_PROPERTY_LIST_LOOP (rest, key, value, props)
|
|
|
901 {
|
|
|
902 if (EQ (key, Qmnemonic))
|
|
|
903 {
|
|
|
904 if (!NILP (value))
|
|
|
905 CHECK_STRING (value);
|
|
|
906 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
|
907 }
|
|
|
908
|
|
|
909 else if (EQ (key, Qeol_type))
|
|
|
910 {
|
|
|
911 need_to_setup_eol_systems = NILP (value);
|
|
|
912 if (EQ (value, Qt))
|
|
|
913 value = Qnil;
|
|
|
914 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
|
915 }
|
|
|
916
|
|
|
917 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
|
918 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
|
919 #ifdef MULE
|
|
|
920 else if (ty == CODESYS_ISO2022)
|
|
|
921 {
|
|
|
922 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
|
923 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
|
924 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
|
925
|
|
|
926 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
|
927 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
|
928 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
|
929 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
|
930
|
|
|
931 #define FROB_FORCE_CHARSET(charset_num) \
|
|
|
932 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
|
933
|
|
|
934 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
|
935 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
|
936 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
|
937 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
|
938
|
|
|
939 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
|
940 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
|
941
|
|
|
942 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
|
943 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
|
944 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
|
945 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
|
946 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
|
947 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
|
948 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
|
949
|
|
|
950 else if (EQ (key, Qinput_charset_conversion))
|
|
|
951 {
|
|
|
952 codesys->iso2022.input_conv =
|
|
|
953 Dynarr_new (charset_conversion_spec);
|
|
|
954 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
|
955 value);
|
|
|
956 }
|
|
|
957 else if (EQ (key, Qoutput_charset_conversion))
|
|
|
958 {
|
|
|
959 codesys->iso2022.output_conv =
|
|
|
960 Dynarr_new (charset_conversion_spec);
|
|
|
961 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
|
962 value);
|
|
|
963 }
|
|
|
964 else
|
|
|
965 signal_simple_error ("Unrecognized property", key);
|
|
|
966 }
|
|
|
967 else if (EQ (type, Qccl))
|
|
|
968 {
|
|
|
969 if (EQ (key, Qdecode))
|
|
|
970 {
|
|
|
971 CHECK_VECTOR (value);
|
|
|
972 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
|
973 }
|
|
|
974 else if (EQ (key, Qencode))
|
|
|
975 {
|
|
|
976 CHECK_VECTOR (value);
|
|
|
977 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
|
978 }
|
|
|
979 else
|
|
|
980 signal_simple_error ("Unrecognized property", key);
|
|
|
981 }
|
|
|
982 #endif /* MULE */
|
|
|
983 else
|
|
|
984 signal_simple_error ("Unrecognized property", key);
|
|
|
985 }
|
|
|
986
|
|
|
987 if (need_to_setup_eol_systems)
|
|
|
988 setup_eol_coding_systems (codesys);
|
|
|
989
|
|
|
990 {
|
|
|
991 Lisp_Object codesys_obj;
|
|
|
992 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
993 Fputhash (name, codesys_obj, Vcoding_system_hash_table);
|
|
|
994 return codesys_obj;
|
|
|
995 }
|
|
|
996 }
|
|
|
997
|
|
|
998 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
999 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
1000 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
1001 be created.
|
|
|
1002 */
|
|
|
1003 (old_coding_system, new_name))
|
|
|
1004 {
|
|
|
1005 Lisp_Object new_coding_system;
|
|
|
1006 old_coding_system = Fget_coding_system (old_coding_system);
|
|
|
1007 new_coding_system = Ffind_coding_system (new_name);
|
|
|
1008 if (NILP (new_coding_system))
|
|
|
1009 {
|
|
|
1010 XSETCODING_SYSTEM (new_coding_system,
|
|
|
1011 allocate_coding_system
|
|
|
1012 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
|
1013 new_name));
|
|
|
1014 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
|
|
1015 }
|
|
|
1016
|
|
|
1017 {
|
|
|
1018 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
1019 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
|
1020 memcpy (((char *) to ) + sizeof (to->header),
|
|
|
1021 ((char *) from) + sizeof (from->header),
|
|
|
1022 sizeof (*from) - sizeof (from->header));
|
|
|
1023 to->name = new_name;
|
|
|
1024 }
|
|
|
1025 return new_coding_system;
|
|
|
1026 }
|
|
|
1027
|
|
|
1028 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
|
1029 Define symbol ALIAS as an alias for coding system CODING-SYSTEM.
|
|
|
1030 */
|
|
|
1031 (alias, coding_system))
|
|
|
1032 {
|
|
|
1033 CHECK_SYMBOL (alias);
|
|
|
1034 if (!NILP (Ffind_coding_system (alias)))
|
|
|
1035 signal_simple_error ("Symbol already names a coding system", alias);
|
|
|
1036 coding_system = Fget_coding_system (coding_system);
|
|
|
1037 Fputhash (alias, coding_system, Vcoding_system_hash_table);
|
|
|
1038
|
|
|
1039 /* Set up aliases for subsidiaries. */
|
|
|
1040 if (XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
|
1041 {
|
|
|
1042 Lisp_Object str;
|
|
|
1043 XSETSTRING (str, symbol_name (XSYMBOL (alias)));
|
|
|
1044 #define FROB(type, name) \
|
|
|
1045 do { \
|
|
|
1046 Lisp_Object subsidiary = XCODING_SYSTEM_EOL_##type (coding_system); \
|
|
|
1047 if (!NILP (subsidiary)) \
|
|
|
1048 Fdefine_coding_system_alias \
|
|
|
1049 (Fintern (concat2 (str, build_string (name)), Qnil), subsidiary); \
|
|
|
1050 } while (0)
|
|
|
1051 FROB (LF, "-unix");
|
|
|
1052 FROB (CRLF, "-dos");
|
|
|
1053 FROB (CR, "-mac");
|
|
|
1054 #undef FROB
|
|
|
1055 }
|
|
|
1056 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
|
|
|
1057 but it doesn't look intentional, so I'd rather return something
|
|
|
1058 meaningful or nothing at all. */
|
|
|
1059 return Qnil;
|
|
|
1060 }
|
|
|
1061
|
|
|
1062 static Lisp_Object
|
|
|
1063 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
|
|
1064 {
|
|
|
1065 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
1066 Lisp_Object new_coding_system;
|
|
|
1067
|
|
|
1068 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
1069 return coding_system;
|
|
|
1070
|
|
|
1071 switch (type)
|
|
|
1072 {
|
|
|
1073 case EOL_AUTODETECT: return coding_system;
|
|
|
1074 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
1075 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
1076 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
|
1077 default: abort ();
|
|
|
1078 }
|
|
|
1079
|
|
|
1080 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
1081 }
|
|
|
1082
|
|
|
1083 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
1084 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
|
1085 */
|
|
|
1086 (coding_system, eol_type))
|
|
|
1087 {
|
|
|
1088 coding_system = Fget_coding_system (coding_system);
|
|
|
1089
|
|
|
1090 return subsidiary_coding_system (coding_system,
|
|
|
1091 symbol_to_eol_type (eol_type));
|
|
|
1092 }
|
|
|
1093
|
|
|
1094
|
|
|
1095 /************************************************************************/
|
|
|
1096 /* Coding system accessors */
|
|
|
1097 /************************************************************************/
|
|
|
1098
|
|
|
1099 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
|
1100 Return the doc string for CODING-SYSTEM.
|
|
|
1101 */
|
|
|
1102 (coding_system))
|
|
|
1103 {
|
|
|
1104 coding_system = Fget_coding_system (coding_system);
|
|
|
1105 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1106 }
|
|
|
1107
|
|
|
1108 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
1109 Return the type of CODING-SYSTEM.
|
|
|
1110 */
|
|
|
1111 (coding_system))
|
|
|
1112 {
|
|
|
1113 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
|
1114 {
|
|
|
1115 default: abort ();
|
|
|
1116 case CODESYS_AUTODETECT: return Qundecided;
|
|
|
1117 #ifdef MULE
|
|
|
1118 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
|
1119 case CODESYS_ISO2022: return Qiso2022;
|
|
|
1120 case CODESYS_BIG5: return Qbig5;
|
|
|
1121 case CODESYS_UCS4: return Qucs4;
|
|
|
1122 case CODESYS_UTF8: return Qutf8;
|
|
|
1123 case CODESYS_CCL: return Qccl;
|
|
|
1124 #endif
|
|
|
1125 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
|
1126 #ifdef DEBUG_XEMACS
|
|
|
1127 case CODESYS_INTERNAL: return Qinternal;
|
|
|
1128 #endif
|
|
|
1129 }
|
|
|
1130 }
|
|
|
1131
|
|
|
1132 #ifdef MULE
|
|
|
1133 static
|
|
|
1134 Lisp_Object coding_system_charset (Lisp_Object coding_system, int gnum)
|
|
|
1135 {
|
|
|
1136 Lisp_Object cs
|
|
|
1137 = XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, gnum);
|
|
|
1138
|
|
|
1139 return CHARSETP (cs) ? XCHARSET_NAME (cs) : Qnil;
|
|
|
1140 }
|
|
|
1141
|
|
|
1142 DEFUN ("coding-system-charset", Fcoding_system_charset, 2, 2, 0, /*
|
|
|
1143 Return initial charset of CODING-SYSTEM designated to GNUM.
|
|
|
1144 GNUM allows 0 .. 3.
|
|
|
1145 */
|
|
|
1146 (coding_system, gnum))
|
|
|
1147 {
|
|
|
1148 coding_system = Fget_coding_system (coding_system);
|
|
|
1149 CHECK_INT (gnum);
|
|
|
1150
|
|
|
1151 return coding_system_charset (coding_system, XINT (gnum));
|
|
|
1152 }
|
|
|
1153 #endif /* MULE */
|
|
|
1154
|
|
|
1155 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
1156 Return the PROP property of CODING-SYSTEM.
|
|
|
1157 */
|
|
|
1158 (coding_system, prop))
|
|
|
1159 {
|
|
|
1160 int i, ok = 0;
|
|
|
1161 enum coding_system_type type;
|
|
|
1162
|
|
|
1163 coding_system = Fget_coding_system (coding_system);
|
|
|
1164 CHECK_SYMBOL (prop);
|
|
|
1165 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
|
1166
|
|
|
1167 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
|
1168 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
|
1169 {
|
|
|
1170 ok = 1;
|
|
|
1171 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
|
1172 {
|
|
|
1173 case CODESYS_PROP_ALL_OK:
|
|
|
1174 break;
|
|
|
1175 #ifdef MULE
|
|
|
1176 case CODESYS_PROP_ISO2022:
|
|
|
1177 if (type != CODESYS_ISO2022)
|
|
|
1178 signal_simple_error
|
|
|
1179 ("Property only valid in ISO2022 coding systems",
|
|
|
1180 prop);
|
|
|
1181 break;
|
|
|
1182
|
|
|
1183 case CODESYS_PROP_CCL:
|
|
|
1184 if (type != CODESYS_CCL)
|
|
|
1185 signal_simple_error
|
|
|
1186 ("Property only valid in CCL coding systems",
|
|
|
1187 prop);
|
|
|
1188 break;
|
|
|
1189 #endif /* MULE */
|
|
|
1190 default:
|
|
|
1191 abort ();
|
|
|
1192 }
|
|
|
1193 }
|
|
|
1194
|
|
|
1195 if (!ok)
|
|
|
1196 signal_simple_error ("Unrecognized property", prop);
|
|
|
1197
|
|
|
1198 if (EQ (prop, Qname))
|
|
|
1199 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1200 else if (EQ (prop, Qtype))
|
|
|
1201 return Fcoding_system_type (coding_system);
|
|
|
1202 else if (EQ (prop, Qdoc_string))
|
|
|
1203 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1204 else if (EQ (prop, Qmnemonic))
|
|
|
1205 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
|
1206 else if (EQ (prop, Qeol_type))
|
|
|
1207 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
|
1208 else if (EQ (prop, Qeol_lf))
|
|
|
1209 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1210 else if (EQ (prop, Qeol_crlf))
|
|
|
1211 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1212 else if (EQ (prop, Qeol_cr))
|
|
|
1213 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1214 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1215 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1216 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1217 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
|
1218 #ifdef MULE
|
|
|
1219 else if (type == CODESYS_ISO2022)
|
|
|
1220 {
|
|
|
1221 if (EQ (prop, Qcharset_g0))
|
|
|
1222 return coding_system_charset (coding_system, 0);
|
|
|
1223 else if (EQ (prop, Qcharset_g1))
|
|
|
1224 return coding_system_charset (coding_system, 1);
|
|
|
1225 else if (EQ (prop, Qcharset_g2))
|
|
|
1226 return coding_system_charset (coding_system, 2);
|
|
|
1227 else if (EQ (prop, Qcharset_g3))
|
|
|
1228 return coding_system_charset (coding_system, 3);
|
|
|
1229
|
|
|
1230 #define FORCE_CHARSET(charset_num) \
|
|
|
1231 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
|
1232 (coding_system, charset_num) ? Qt : Qnil)
|
|
|
1233
|
|
|
1234 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
|
1235 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
|
1236 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
|
1237 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
|
1238
|
|
|
1239 #define LISP_BOOLEAN(prop) \
|
|
|
1240 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
|
1241
|
|
|
1242 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
|
1243 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
|
1244 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
|
1245 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
|
1246 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
|
1247 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
|
1248 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
|
1249
|
|
|
1250 else if (EQ (prop, Qinput_charset_conversion))
|
|
|
1251 return
|
|
|
1252 unparse_charset_conversion_specs
|
|
|
1253 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
|
1254 else if (EQ (prop, Qoutput_charset_conversion))
|
|
|
1255 return
|
|
|
1256 unparse_charset_conversion_specs
|
|
|
1257 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
|
1258 else
|
|
|
1259 abort ();
|
|
|
1260 }
|
|
|
1261 else if (type == CODESYS_CCL)
|
|
|
1262 {
|
|
|
1263 if (EQ (prop, Qdecode))
|
|
|
1264 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
|
1265 else if (EQ (prop, Qencode))
|
|
|
1266 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
|
1267 else
|
|
|
1268 abort ();
|
|
|
1269 }
|
|
|
1270 #endif /* MULE */
|
|
|
1271 else
|
|
|
1272 abort ();
|
|
|
1273
|
|
|
1274 return Qnil; /* not reached */
|
|
|
1275 }
|
|
|
1276
|
|
|
1277
|
|
|
1278 /************************************************************************/
|
|
|
1279 /* Coding category functions */
|
|
|
1280 /************************************************************************/
|
|
|
1281
|
|
|
1282 static int
|
|
|
1283 decode_coding_category (Lisp_Object symbol)
|
|
|
1284 {
|
|
|
1285 int i;
|
|
|
1286
|
|
|
1287 CHECK_SYMBOL (symbol);
|
|
|
1288 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1289 if (EQ (coding_category_symbol[i], symbol))
|
|
|
1290 return i;
|
|
|
1291
|
|
|
1292 signal_simple_error ("Unrecognized coding category", symbol);
|
|
|
1293 return 0; /* not reached */
|
|
|
1294 }
|
|
|
1295
|
|
|
1296 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
1297 Return a list of all recognized coding categories.
|
|
|
1298 */
|
|
|
1299 ())
|
|
|
1300 {
|
|
|
1301 int i;
|
|
|
1302 Lisp_Object list = Qnil;
|
|
|
1303
|
|
|
1304 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1305 list = Fcons (coding_category_symbol[i], list);
|
|
|
1306 return list;
|
|
|
1307 }
|
|
|
1308
|
|
|
1309 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
1310 Change the priority order of the coding categories.
|
|
|
1311 LIST should be list of coding categories, in descending order of
|
|
|
1312 priority. Unspecified coding categories will be lower in priority
|
|
|
1313 than all specified ones, in the same relative order they were in
|
|
|
1314 previously.
|
|
|
1315 */
|
|
|
1316 (list))
|
|
|
1317 {
|
|
|
1318 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
|
1319 int i, j;
|
|
|
1320 Lisp_Object rest;
|
|
|
1321
|
|
|
1322 /* First generate a list that maps coding categories to priorities. */
|
|
|
1323
|
|
|
1324 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1325 category_to_priority[i] = -1;
|
|
|
1326
|
|
|
1327 /* Highest priority comes from the specified list. */
|
|
|
1328 i = 0;
|
|
|
1329 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
1330 {
|
|
|
1331 int cat = decode_coding_category (XCAR (rest));
|
|
|
1332
|
|
|
1333 if (category_to_priority[cat] >= 0)
|
|
|
1334 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
|
1335 category_to_priority[cat] = i++;
|
|
|
1336 }
|
|
|
1337
|
|
|
1338 /* Now go through the existing categories by priority to retrieve
|
|
|
1339 the categories not yet specified and preserve their priority
|
|
|
1340 order. */
|
|
|
1341 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
|
1342 {
|
|
|
1343 int cat = fcd->coding_category_by_priority[j];
|
|
|
1344 if (category_to_priority[cat] < 0)
|
|
|
1345 category_to_priority[cat] = i++;
|
|
|
1346 }
|
|
|
1347
|
|
|
1348 /* Now we need to construct the inverse of the mapping we just
|
|
|
1349 constructed. */
|
|
|
1350
|
|
|
1351 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1352 fcd->coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
1353
|
|
|
1354 /* Phew! That was confusing. */
|
|
|
1355 return Qnil;
|
|
|
1356 }
|
|
|
1357
|
|
|
1358 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
1359 Return a list of coding categories in descending order of priority.
|
|
|
1360 */
|
|
|
1361 ())
|
|
|
1362 {
|
|
|
1363 int i;
|
|
|
1364 Lisp_Object list = Qnil;
|
|
|
1365
|
|
|
1366 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1367 list = Fcons (coding_category_symbol[fcd->coding_category_by_priority[i]],
|
|
|
1368 list);
|
|
|
1369 return list;
|
|
|
1370 }
|
|
|
1371
|
|
|
1372 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
1373 Change the coding system associated with a coding category.
|
|
|
1374 */
|
|
|
1375 (coding_category, coding_system))
|
|
|
1376 {
|
|
|
1377 int cat = decode_coding_category (coding_category);
|
|
|
1378
|
|
|
1379 coding_system = Fget_coding_system (coding_system);
|
|
|
1380 fcd->coding_category_system[cat] = coding_system;
|
|
|
1381 return Qnil;
|
|
|
1382 }
|
|
|
1383
|
|
|
1384 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
1385 Return the coding system associated with a coding category.
|
|
|
1386 */
|
|
|
1387 (coding_category))
|
|
|
1388 {
|
|
|
1389 int cat = decode_coding_category (coding_category);
|
|
|
1390 Lisp_Object sys = fcd->coding_category_system[cat];
|
|
|
1391
|
|
|
1392 if (!NILP (sys))
|
|
|
1393 return XCODING_SYSTEM_NAME (sys);
|
|
|
1394 return Qnil;
|
|
|
1395 }
|
|
|
1396
|
|
|
1397
|
|
|
1398 /************************************************************************/
|
|
|
1399 /* Detecting the encoding of data */
|
|
|
1400 /************************************************************************/
|
|
|
1401
|
|
|
1402 struct detection_state
|
|
|
1403 {
|
|
|
1404 enum eol_type eol_type;
|
|
|
1405 int seen_non_ascii;
|
|
|
1406 int mask;
|
|
|
1407 #ifdef MULE
|
|
|
1408 struct
|
|
|
1409 {
|
|
|
1410 int mask;
|
|
|
1411 int in_second_byte;
|
|
|
1412 }
|
|
|
1413 big5;
|
|
|
1414
|
|
|
1415 struct
|
|
|
1416 {
|
|
|
1417 int mask;
|
|
|
1418 int in_second_byte;
|
|
|
1419 }
|
|
|
1420 shift_jis;
|
|
|
1421
|
|
|
1422 struct
|
|
|
1423 {
|
|
|
1424 int mask;
|
|
|
1425 int in_byte;
|
|
|
1426 }
|
|
|
1427 ucs4;
|
|
|
1428
|
|
|
1429 struct
|
|
|
1430 {
|
|
|
1431 int mask;
|
|
|
1432 int in_byte;
|
|
|
1433 }
|
|
|
1434 utf8;
|
|
|
1435
|
|
|
1436 struct
|
|
|
1437 {
|
|
|
1438 int mask;
|
|
|
1439 int initted;
|
|
|
1440 struct iso2022_decoder iso;
|
|
|
1441 unsigned int flags;
|
|
|
1442 int high_byte_count;
|
|
|
1443 unsigned int saw_single_shift:1;
|
|
|
1444 }
|
|
|
1445 iso2022;
|
|
|
1446 #endif
|
|
|
1447 struct
|
|
|
1448 {
|
|
|
1449 int seen_anything;
|
|
|
1450 int just_saw_cr;
|
|
|
1451 }
|
|
|
1452 eol;
|
|
|
1453 };
|
|
|
1454
|
|
|
1455 static int
|
|
|
1456 acceptable_control_char_p (int c)
|
|
|
1457 {
|
|
|
1458 switch (c)
|
|
|
1459 {
|
|
|
1460 /* Allow and ignore control characters that you might
|
|
|
1461 reasonably see in a text file */
|
|
|
1462 case '\r':
|
|
|
1463 case '\n':
|
|
|
1464 case '\t':
|
|
|
1465 case 7: /* bell */
|
|
|
1466 case 8: /* backspace */
|
|
|
1467 case 11: /* vertical tab */
|
|
|
1468 case 12: /* form feed */
|
|
|
1469 case 26: /* MS-DOS C-z junk */
|
|
|
1470 case 31: /* '^_' -- for info */
|
|
|
1471 return 1;
|
|
|
1472 default:
|
|
|
1473 return 0;
|
|
|
1474 }
|
|
|
1475 }
|
|
|
1476
|
|
|
1477 static int
|
|
|
1478 mask_has_at_most_one_bit_p (int mask)
|
|
|
1479 {
|
|
|
1480 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
|
1481 technical interviews */
|
|
|
1482 return (mask & (mask - 1)) == 0;
|
|
|
1483 }
|
|
|
1484
|
|
|
1485 static enum eol_type
|
|
|
1486 detect_eol_type (struct detection_state *st, CONST unsigned char *src,
|
|
|
1487 unsigned int n)
|
|
|
1488 {
|
|
|
1489 int c;
|
|
|
1490
|
|
|
1491 while (n--)
|
|
|
1492 {
|
|
|
1493 c = *src++;
|
|
|
1494 if (c == '\n')
|
|
|
1495 {
|
|
|
1496 if (st->eol.just_saw_cr)
|
|
|
1497 return EOL_CRLF;
|
|
|
1498 else if (st->eol.seen_anything)
|
|
|
1499 return EOL_LF;
|
|
|
1500 }
|
|
|
1501 else if (st->eol.just_saw_cr)
|
|
|
1502 return EOL_CR;
|
|
|
1503 else if (c == '\r')
|
|
|
1504 st->eol.just_saw_cr = 1;
|
|
|
1505 else
|
|
|
1506 st->eol.just_saw_cr = 0;
|
|
|
1507 st->eol.seen_anything = 1;
|
|
|
1508 }
|
|
|
1509
|
|
|
1510 return EOL_AUTODETECT;
|
|
|
1511 }
|
|
|
1512
|
|
|
1513 /* Attempt to determine the encoding and EOL type of the given text.
|
|
|
1514 Before calling this function for the first type, you must initialize
|
|
|
1515 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
|
1516
|
|
|
1517 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
|
1518 not yet known.
|
|
|
1519
|
|
|
1520 st->mask holds the determined coding category mask, or ~0 if only
|
|
|
1521 ASCII has been seen so far.
|
|
|
1522
|
|
|
1523 Returns:
|
|
|
1524
|
|
|
1525 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
|
1526 is present in st->mask
|
|
|
1527 1 == definitive answers are here for both st->eol_type and st->mask
|
|
|
1528 */
|
|
|
1529
|
|
|
1530 static int
|
|
|
1531 detect_coding_type (struct detection_state *st, CONST Extbyte *src,
|
|
|
1532 unsigned int n, int just_do_eol)
|
|
|
1533 {
|
|
|
1534 int c;
|
|
|
1535
|
|
|
1536 if (st->eol_type == EOL_AUTODETECT)
|
|
|
1537 st->eol_type = detect_eol_type (st, src, n);
|
|
|
1538
|
|
|
1539 if (just_do_eol)
|
|
|
1540 return st->eol_type != EOL_AUTODETECT;
|
|
|
1541
|
|
|
1542 if (!st->seen_non_ascii)
|
|
|
1543 {
|
|
|
1544 for (; n; n--, src++)
|
|
|
1545 {
|
|
|
1546 c = *src;
|
|
|
1547 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
1548 {
|
|
|
1549 st->seen_non_ascii = 1;
|
|
|
1550 #ifdef MULE
|
|
|
1551 st->shift_jis.mask = ~0;
|
|
|
1552 st->big5.mask = ~0;
|
|
|
1553 st->ucs4.mask = ~0;
|
|
|
1554 st->utf8.mask = ~0;
|
|
|
1555 st->iso2022.mask = ~0;
|
|
|
1556 #endif
|
|
|
1557 break;
|
|
|
1558 }
|
|
|
1559 }
|
|
|
1560 }
|
|
|
1561
|
|
|
1562 if (!n)
|
|
|
1563 return 0;
|
|
|
1564 #ifdef MULE
|
|
|
1565 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
|
1566 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
|
1567 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
|
1568 st->shift_jis.mask = detect_coding_sjis (st, src, n);
|
|
|
1569 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
|
1570 st->big5.mask = detect_coding_big5 (st, src, n);
|
|
|
1571 if (!mask_has_at_most_one_bit_p (st->utf8.mask))
|
|
|
1572 st->utf8.mask = detect_coding_utf8 (st, src, n);
|
|
|
1573 if (!mask_has_at_most_one_bit_p (st->ucs4.mask))
|
|
|
1574 st->ucs4.mask = detect_coding_ucs4 (st, src, n);
|
|
|
1575
|
|
|
1576 st->mask
|
|
|
1577 = st->iso2022.mask | st->shift_jis.mask | st->big5.mask
|
|
|
1578 | st->utf8.mask | st->ucs4.mask;
|
|
|
1579 #endif
|
|
|
1580 {
|
|
|
1581 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
|
1582 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
|
1583 return retval && st->eol_type != EOL_AUTODETECT;
|
|
|
1584 }
|
|
|
1585 }
|
|
|
1586
|
|
|
1587 static Lisp_Object
|
|
|
1588 coding_system_from_mask (int mask)
|
|
|
1589 {
|
|
|
1590 if (mask == ~0)
|
|
|
1591 {
|
|
|
1592 /* If the file was entirely or basically ASCII, use the
|
|
|
1593 default value of `buffer-file-coding-system'. */
|
|
|
1594 Lisp_Object retval =
|
|
|
1595 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
|
1596 if (!NILP (retval))
|
|
|
1597 {
|
|
|
1598 retval = Ffind_coding_system (retval);
|
|
|
1599 if (NILP (retval))
|
|
|
1600 {
|
|
|
1601 warn_when_safe
|
|
|
1602 (Qbad_variable, Qwarning,
|
|
|
1603 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
1604 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
|
1605 }
|
|
|
1606 }
|
|
|
1607 if (NILP (retval))
|
|
|
1608 retval = Fget_coding_system (Qraw_text);
|
|
|
1609 return retval;
|
|
|
1610 }
|
|
|
1611 else
|
|
|
1612 {
|
|
|
1613 int i;
|
|
|
1614 int cat = -1;
|
|
|
1615 #ifdef MULE
|
|
|
1616 mask = postprocess_iso2022_mask (mask);
|
|
|
1617 #endif
|
|
|
1618 /* Look through the coding categories by priority and find
|
|
|
1619 the first one that is allowed. */
|
|
|
1620 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1621 {
|
|
|
1622 cat = fcd->coding_category_by_priority[i];
|
|
|
1623 if ((mask & (1 << cat)) &&
|
|
|
1624 !NILP (fcd->coding_category_system[cat]))
|
|
|
1625 break;
|
|
|
1626 }
|
|
|
1627 if (cat >= 0)
|
|
|
1628 return fcd->coding_category_system[cat];
|
|
|
1629 else
|
|
|
1630 return Fget_coding_system (Qraw_text);
|
|
|
1631 }
|
|
|
1632 }
|
|
|
1633
|
|
|
1634 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
1635 as specified, do any autodetection that is called for. If the
|
|
|
1636 coding system and/or EOL type are not `autodetect', they will be left
|
|
|
1637 alone; but this function will never return an autodetect coding system
|
|
|
1638 or EOL type.
|
|
|
1639
|
|
|
1640 This function does not automatically fetch subsidiary coding systems;
|
|
|
1641 that should be unnecessary with the explicit eol-type argument. */
|
|
|
1642
|
|
|
1643 #define LENGTH(string_constant) (sizeof (string_constant) - 1)
|
|
|
1644
|
|
|
1645 void
|
|
|
1646 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
|
|
1647 enum eol_type *eol_type_in_out)
|
|
|
1648 {
|
|
|
1649 struct detection_state decst;
|
|
|
1650
|
|
|
1651 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1652 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
|
1653
|
|
|
1654 xzero (decst);
|
|
|
1655 decst.eol_type = *eol_type_in_out;
|
|
|
1656 decst.mask = ~0;
|
|
|
1657
|
|
|
1658 /* If autodetection is called for, do it now. */
|
|
|
1659 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
|
|
|
1660 || *eol_type_in_out == EOL_AUTODETECT)
|
|
|
1661 {
|
|
|
1662 Extbyte buf[4096];
|
|
|
1663 Lisp_Object coding_system = Qnil;
|
|
|
1664 Extbyte *p;
|
|
|
1665 ssize_t nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1666 Extbyte *scan_end;
|
|
|
1667
|
|
|
1668 /* Look for initial "-*-"; mode line prefix */
|
|
|
1669 for (p = buf,
|
|
|
1670 scan_end = buf + nread - LENGTH ("-*-coding:?-*-");
|
|
|
1671 p <= scan_end
|
|
|
1672 && *p != '\n'
|
|
|
1673 && *p != '\r';
|
|
|
1674 p++)
|
|
|
1675 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
1676 {
|
|
|
1677 Extbyte *local_vars_beg = p + 3;
|
|
|
1678 /* Look for final "-*-"; mode line suffix */
|
|
|
1679 for (p = local_vars_beg,
|
|
|
1680 scan_end = buf + nread - LENGTH ("-*-");
|
|
|
1681 p <= scan_end
|
|
|
1682 && *p != '\n'
|
|
|
1683 && *p != '\r';
|
|
|
1684 p++)
|
|
|
1685 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
1686 {
|
|
|
1687 Extbyte *suffix = p;
|
|
|
1688 /* Look for "coding:" */
|
|
|
1689 for (p = local_vars_beg,
|
|
|
1690 scan_end = suffix - LENGTH ("coding:?");
|
|
|
1691 p <= scan_end;
|
|
|
1692 p++)
|
|
|
1693 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0
|
|
|
1694 && (p == local_vars_beg
|
|
|
1695 || (*(p-1) == ' ' ||
|
|
|
1696 *(p-1) == '\t' ||
|
|
|
1697 *(p-1) == ';')))
|
|
|
1698 {
|
|
|
1699 Extbyte save;
|
|
|
1700 int n;
|
|
|
1701 p += LENGTH ("coding:");
|
|
|
1702 while (*p == ' ' || *p == '\t') p++;
|
|
|
1703
|
|
|
1704 /* Get coding system name */
|
|
|
1705 save = *suffix; *suffix = '\0';
|
|
|
1706 /* Characters valid in a MIME charset name (rfc 1521),
|
|
|
1707 and in a Lisp symbol name. */
|
|
|
1708 n = strspn ( (char *) p,
|
|
|
1709 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
1710 "abcdefghijklmnopqrstuvwxyz"
|
|
|
1711 "0123456789"
|
|
|
1712 "!$%&*+-.^_{|}~");
|
|
|
1713 *suffix = save;
|
|
|
1714 if (n > 0)
|
|
|
1715 {
|
|
|
1716 save = p[n]; p[n] = '\0';
|
|
|
1717 coding_system =
|
|
|
1718 Ffind_coding_system (intern ((char *) p));
|
|
|
1719 p[n] = save;
|
|
|
1720 }
|
|
|
1721 break;
|
|
|
1722 }
|
|
|
1723 break;
|
|
|
1724 }
|
|
|
1725 break;
|
|
|
1726 }
|
|
|
1727
|
|
|
1728 if (NILP (coding_system))
|
|
|
1729 do
|
|
|
1730 {
|
|
|
1731 if (detect_coding_type (&decst, buf, nread,
|
|
|
1732 XCODING_SYSTEM_TYPE (*codesys_in_out)
|
|
|
1733 != CODESYS_AUTODETECT))
|
|
|
1734 break;
|
|
|
1735 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1736 if (nread == 0)
|
|
|
1737 break;
|
|
|
1738 }
|
|
|
1739 while (1);
|
|
|
1740
|
|
|
1741 else if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
|
|
|
1742 && XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
|
1743 do
|
|
|
1744 {
|
|
|
1745 if (detect_coding_type (&decst, buf, nread, 1))
|
|
|
1746 break;
|
|
|
1747 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1748 if (!nread)
|
|
|
1749 break;
|
|
|
1750 }
|
|
|
1751 while (1);
|
|
|
1752
|
|
|
1753 *eol_type_in_out = decst.eol_type;
|
|
|
1754 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
|
|
1755 {
|
|
|
1756 if (NILP (coding_system))
|
|
|
1757 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
|
1758 else
|
|
|
1759 *codesys_in_out = coding_system;
|
|
|
1760 }
|
|
|
1761 }
|
|
|
1762
|
|
|
1763 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
|
1764 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1765 *eol_type_in_out = EOL_LF;
|
|
|
1766
|
|
|
1767 Lstream_rewind (stream);
|
|
|
1768 }
|
|
|
1769
|
|
|
1770 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
1771 Detect coding system of the text in the region between START and END.
|
|
|
1772 Returned a list of possible coding systems ordered by priority.
|
|
|
1773 If only ASCII characters are found, it returns 'undecided or one of
|
|
|
1774 its subsidiary coding systems according to a detected end-of-line
|
|
|
1775 type. Optional arg BUFFER defaults to the current buffer.
|
|
|
1776 */
|
|
|
1777 (start, end, buffer))
|
|
|
1778 {
|
|
|
1779 Lisp_Object val = Qnil;
|
|
|
1780 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1781 Bufpos b, e;
|
|
|
1782 Lisp_Object instream, lb_instream;
|
|
|
1783 Lstream *istr, *lb_istr;
|
|
|
1784 struct detection_state decst;
|
|
|
1785 struct gcpro gcpro1, gcpro2;
|
|
|
1786
|
|
|
1787 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
1788 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1789 lb_istr = XLSTREAM (lb_instream);
|
|
|
1790 instream = make_encoding_input_stream (lb_istr, Fget_coding_system (Qbinary));
|
|
|
1791 istr = XLSTREAM (instream);
|
|
|
1792 GCPRO2 (instream, lb_instream);
|
|
|
1793 xzero (decst);
|
|
|
1794 decst.eol_type = EOL_AUTODETECT;
|
|
|
1795 decst.mask = ~0;
|
|
|
1796 while (1)
|
|
|
1797 {
|
|
|
1798 unsigned char random_buffer[4096];
|
|
|
1799 ssize_t nread = Lstream_read (istr, random_buffer, sizeof (random_buffer));
|
|
|
1800
|
|
|
1801 if (!nread)
|
|
|
1802 break;
|
|
|
1803 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
|
1804 break;
|
|
|
1805 }
|
|
|
1806
|
|
|
1807 if (decst.mask == ~0)
|
|
|
1808 val = subsidiary_coding_system (Fget_coding_system (Qundecided),
|
|
|
1809 decst.eol_type);
|
|
|
1810 else
|
|
|
1811 {
|
|
|
1812 int i;
|
|
|
1813
|
|
|
1814 val = Qnil;
|
|
|
1815 #ifdef MULE
|
|
|
1816 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
|
1817 #endif
|
|
|
1818 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1819 {
|
|
|
1820 int sys = fcd->coding_category_by_priority[i];
|
|
|
1821 if (decst.mask & (1 << sys))
|
|
|
1822 {
|
|
|
1823 Lisp_Object codesys = fcd->coding_category_system[sys];
|
|
|
1824 if (!NILP (codesys))
|
|
|
1825 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
|
1826 val = Fcons (codesys, val);
|
|
|
1827 }
|
|
|
1828 }
|
|
|
1829 }
|
|
|
1830 Lstream_close (istr);
|
|
|
1831 UNGCPRO;
|
|
|
1832 Lstream_delete (istr);
|
|
|
1833 Lstream_delete (lb_istr);
|
|
|
1834 return val;
|
|
|
1835 }
|
|
|
1836
|
|
|
1837
|
|
|
1838 /************************************************************************/
|
|
|
1839 /* Converting to internal Mule format ("decoding") */
|
|
|
1840 /************************************************************************/
|
|
|
1841
|
|
|
1842 /* A decoding stream is a stream used for decoding text (i.e.
|
|
|
1843 converting from some external format to internal format).
|
|
|
1844 The decoding-stream object keeps track of the actual coding
|
|
|
1845 stream, the stream that is at the other end, and data that
|
|
|
1846 needs to be persistent across the lifetime of the stream. */
|
|
|
1847
|
|
|
1848 /* Handle the EOL stuff related to just-read-in character C.
|
|
|
1849 EOL_TYPE is the EOL type of the coding stream.
|
|
|
1850 FLAGS is the current value of FLAGS in the coding stream, and may
|
|
|
1851 be modified by this macro. (The macro only looks at the
|
|
|
1852 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
|
|
|
1853 bytes are to be written. You need to also define a local goto
|
|
|
1854 label "label_continue_loop" that is at the end of the main
|
|
|
1855 character-reading loop.
|
|
|
1856
|
|
|
1857 If C is a CR character, then this macro handles it entirely and
|
|
|
1858 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
|
1859 anything to DST, and continues normally. You should continue
|
|
|
1860 processing C normally after this macro. */
|
|
|
1861
|
|
|
1862 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
|
|
|
1863 do { \
|
|
|
1864 if (c == '\r') \
|
|
|
1865 { \
|
|
|
1866 if (eol_type == EOL_CR) \
|
|
|
1867 Dynarr_add (dst, '\n'); \
|
|
|
1868 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
|
1869 Dynarr_add (dst, c); \
|
|
|
1870 else \
|
|
|
1871 flags |= CODING_STATE_CR; \
|
|
|
1872 goto label_continue_loop; \
|
|
|
1873 } \
|
|
|
1874 else if (flags & CODING_STATE_CR) \
|
|
|
1875 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
|
|
|
1876 if (c != '\n') \
|
|
|
1877 Dynarr_add (dst, '\r'); \
|
|
|
1878 flags &= ~CODING_STATE_CR; \
|
|
|
1879 } \
|
|
|
1880 } while (0)
|
|
|
1881
|
|
|
1882 /* C should be a binary character in the range 0 - 255; convert
|
|
|
1883 to internal format and add to Dynarr DST. */
|
|
|
1884
|
|
|
1885 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
|
1886 do { \
|
|
|
1887 if (BYTE_ASCII_P (c)) \
|
|
|
1888 Dynarr_add (dst, c); \
|
|
|
1889 else if (BYTE_C1_P (c)) \
|
|
|
1890 { \
|
|
|
1891 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
|
1892 Dynarr_add (dst, c + 0x20); \
|
|
|
1893 } \
|
|
|
1894 else \
|
|
|
1895 { \
|
|
|
1896 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
|
|
|
1897 Dynarr_add (dst, c); \
|
|
|
1898 } \
|
|
|
1899 } while (0)
|
|
|
1900
|
|
|
1901 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
|
1902 do { \
|
|
|
1903 if (ch) \
|
|
|
1904 { \
|
|
|
1905 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
|
1906 ch = 0; \
|
|
|
1907 } \
|
|
|
1908 } while (0)
|
|
|
1909
|
|
|
1910 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
|
|
|
1911 do { \
|
|
|
1912 if (flags & CODING_STATE_END) \
|
|
|
1913 { \
|
|
|
1914 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
|
1915 if (flags & CODING_STATE_CR) \
|
|
|
1916 Dynarr_add (dst, '\r'); \
|
|
|
1917 } \
|
|
|
1918 } while (0)
|
|
|
1919
|
|
|
1920 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
|
1921
|
|
|
1922 struct decoding_stream
|
|
|
1923 {
|
|
|
1924 /* Coding system that governs the conversion. */
|
|
|
1925 Lisp_Coding_System *codesys;
|
|
|
1926
|
|
|
1927 /* Stream that we read the encoded data from or
|
|
|
1928 write the decoded data to. */
|
|
|
1929 Lstream *other_end;
|
|
|
1930
|
|
|
1931 /* If we are reading, then we can return only a fixed amount of
|
|
|
1932 data, so if the conversion resulted in too much data, we store it
|
|
|
1933 here for retrieval the next time around. */
|
|
|
1934 unsigned_char_dynarr *runoff;
|
|
|
1935
|
|
|
1936 /* FLAGS holds flags indicating the current state of the decoding.
|
|
|
1937 Some of these flags are dependent on the coding system. */
|
|
|
1938 unsigned int flags;
|
|
|
1939
|
|
|
1940 /* CH holds a partially built-up character. Since we only deal
|
|
|
1941 with one- and two-byte characters at the moment, we only use
|
|
|
1942 this to store the first byte of a two-byte character. */
|
|
|
1943 unsigned int ch;
|
|
|
1944
|
|
|
1945 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
|
1946 currently applies. We need to keep this separate from the
|
|
|
1947 EOL type stored in CODESYS because the latter might indicate
|
|
|
1948 automatic EOL-type detection while the former will always
|
|
|
1949 indicate a particular EOL type. */
|
|
|
1950 enum eol_type eol_type;
|
|
|
1951 #ifdef MULE
|
|
|
1952 /* Additional ISO2022 information. We define the structure above
|
|
|
1953 because it's also needed by the detection routines. */
|
|
|
1954 struct iso2022_decoder iso2022;
|
|
|
1955
|
|
|
1956 /* Additional information (the state of the running CCL program)
|
|
|
1957 used by the CCL decoder. */
|
|
|
1958 struct ccl_program ccl;
|
|
|
1959
|
|
|
1960 /* counter for UTF-8 or UCS-4 */
|
|
|
1961 unsigned char counter;
|
|
|
1962 #endif
|
|
|
1963 struct detection_state decst;
|
|
|
1964 };
|
|
|
1965
|
|
|
1966 static ssize_t decoding_reader (Lstream *stream,
|
|
|
1967 unsigned char *data, size_t size);
|
|
|
1968 static ssize_t decoding_writer (Lstream *stream,
|
|
|
1969 CONST unsigned char *data, size_t size);
|
|
|
1970 static int decoding_rewinder (Lstream *stream);
|
|
|
1971 static int decoding_seekable_p (Lstream *stream);
|
|
|
1972 static int decoding_flusher (Lstream *stream);
|
|
|
1973 static int decoding_closer (Lstream *stream);
|
|
|
1974
|
|
|
1975 static Lisp_Object decoding_marker (Lisp_Object stream);
|
|
|
1976
|
|
|
1977 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
|
1978 sizeof (struct decoding_stream));
|
|
|
1979
|
|
|
1980 static Lisp_Object
|
|
|
1981 decoding_marker (Lisp_Object stream)
|
|
|
1982 {
|
|
|
1983 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
1984 Lisp_Object str_obj;
|
|
|
1985
|
|
|
1986 /* We do not need to mark the coding systems or charsets stored
|
|
|
1987 within the stream because they are stored in a global list
|
|
|
1988 and automatically marked. */
|
|
|
1989
|
|
|
1990 XSETLSTREAM (str_obj, str);
|
|
|
1991 mark_object (str_obj);
|
|
|
1992 if (str->imp->marker)
|
|
|
1993 return (str->imp->marker) (str_obj);
|
|
|
1994 else
|
|
|
1995 return Qnil;
|
|
|
1996 }
|
|
|
1997
|
|
|
1998 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
|
1999 so we read data from the other end, decode it, and store it into DATA. */
|
|
|
2000
|
|
|
2001 static ssize_t
|
|
|
2002 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
|
2003 {
|
|
|
2004 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2005 unsigned char *orig_data = data;
|
|
|
2006 ssize_t read_size;
|
|
|
2007 int error_occurred = 0;
|
|
|
2008
|
|
|
2009 /* We need to interface to mule_decode(), which expects to take some
|
|
|
2010 amount of data and store the result into a Dynarr. We have
|
|
|
2011 mule_decode() store into str->runoff, and take data from there
|
|
|
2012 as necessary. */
|
|
|
2013
|
|
|
2014 /* We loop until we have enough data, reading chunks from the other
|
|
|
2015 end and decoding it. */
|
|
|
2016 while (1)
|
|
|
2017 {
|
|
|
2018 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2019 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2020 if (Dynarr_length (str->runoff) > 0)
|
|
|
2021 {
|
|
|
2022 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
|
|
|
2023 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2024 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2025 data += chunk;
|
|
|
2026 size -= chunk;
|
|
|
2027 }
|
|
|
2028
|
|
|
2029 if (size == 0)
|
|
|
2030 break; /* No more room for data */
|
|
|
2031
|
|
|
2032 if (str->flags & CODING_STATE_END)
|
|
|
2033 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2034 the other end. We loop once more so that mule_decode() can
|
|
|
2035 output any final stuff it may be holding, or any "go back
|
|
|
2036 to a sane state" escape sequences. (This latter makes sense
|
|
|
2037 during encoding.) */
|
|
|
2038 break;
|
|
|
2039
|
|
|
2040 /* Exhausted the runoff, so get some more. DATA has at least
|
|
|
2041 SIZE bytes left of storage in it, so it's OK to read directly
|
|
|
2042 into it. (We'll be overwriting above, after we've decoded it
|
|
|
2043 into the runoff.) */
|
|
|
2044 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2045 if (read_size < 0)
|
|
|
2046 {
|
|
|
2047 error_occurred = 1;
|
|
|
2048 break;
|
|
|
2049 }
|
|
|
2050 if (read_size == 0)
|
|
|
2051 /* There might be some more end data produced in the translation.
|
|
|
2052 See the comment above. */
|
|
|
2053 str->flags |= CODING_STATE_END;
|
|
|
2054 mule_decode (stream, data, str->runoff, read_size);
|
|
|
2055 }
|
|
|
2056
|
|
|
2057 if (data - orig_data == 0)
|
|
|
2058 return error_occurred ? -1 : 0;
|
|
|
2059 else
|
|
|
2060 return data - orig_data;
|
|
|
2061 }
|
|
|
2062
|
|
|
2063 static ssize_t
|
|
|
2064 decoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
|
|
2065 {
|
|
|
2066 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2067 ssize_t retval;
|
|
|
2068
|
|
|
2069 /* Decode all our data into the runoff, and then attempt to write
|
|
|
2070 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2071 in writing. */
|
|
|
2072 mule_decode (stream, data, str->runoff, size);
|
|
|
2073 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2074 Dynarr_length (str->runoff));
|
|
|
2075 if (retval > 0)
|
|
|
2076 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2077 /* Do NOT return retval. The return value indicates how much
|
|
|
2078 of the incoming data was written, not how many bytes were
|
|
|
2079 written. */
|
|
|
2080 return size;
|
|
|
2081 }
|
|
|
2082
|
|
|
2083 static void
|
|
|
2084 reset_decoding_stream (struct decoding_stream *str)
|
|
|
2085 {
|
|
|
2086 #ifdef MULE
|
|
|
2087 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
2088 {
|
|
|
2089 Lisp_Object coding_system;
|
|
|
2090 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2091 reset_iso2022 (coding_system, &str->iso2022);
|
|
|
2092 }
|
|
|
2093 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
2094 {
|
|
|
2095 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
|
|
|
2096 }
|
|
|
2097 str->counter = 0;
|
|
|
2098 #endif /* MULE */
|
|
|
2099 str->flags = str->ch = 0;
|
|
|
2100 }
|
|
|
2101
|
|
|
2102 static int
|
|
|
2103 decoding_rewinder (Lstream *stream)
|
|
|
2104 {
|
|
|
2105 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2106 reset_decoding_stream (str);
|
|
|
2107 Dynarr_reset (str->runoff);
|
|
|
2108 return Lstream_rewind (str->other_end);
|
|
|
2109 }
|
|
|
2110
|
|
|
2111 static int
|
|
|
2112 decoding_seekable_p (Lstream *stream)
|
|
|
2113 {
|
|
|
2114 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2115 return Lstream_seekable_p (str->other_end);
|
|
|
2116 }
|
|
|
2117
|
|
|
2118 static int
|
|
|
2119 decoding_flusher (Lstream *stream)
|
|
|
2120 {
|
|
|
2121 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2122 return Lstream_flush (str->other_end);
|
|
|
2123 }
|
|
|
2124
|
|
|
2125 static int
|
|
|
2126 decoding_closer (Lstream *stream)
|
|
|
2127 {
|
|
|
2128 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2129 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2130 {
|
|
|
2131 str->flags |= CODING_STATE_END;
|
|
|
2132 decoding_writer (stream, 0, 0);
|
|
|
2133 }
|
|
|
2134 Dynarr_free (str->runoff);
|
|
|
2135 #ifdef MULE
|
|
|
2136 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
2137 if (str->iso2022.composite_chars)
|
|
|
2138 Dynarr_free (str->iso2022.composite_chars);
|
|
|
2139 #endif
|
|
|
2140 #endif
|
|
|
2141 return Lstream_close (str->other_end);
|
|
|
2142 }
|
|
|
2143
|
|
|
2144 Lisp_Object
|
|
|
2145 decoding_stream_coding_system (Lstream *stream)
|
|
|
2146 {
|
|
|
2147 Lisp_Object coding_system;
|
|
|
2148 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2149
|
|
|
2150 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2151 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
|
2152 }
|
|
|
2153
|
|
|
2154 void
|
|
|
2155 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2156 {
|
|
|
2157 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
2158 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2159 str->codesys = cs;
|
|
|
2160 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
2161 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
|
2162 reset_decoding_stream (str);
|
|
|
2163 }
|
|
|
2164
|
|
|
2165 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
|
2166 stream for writing, no automatic code detection will be performed.
|
|
|
2167 The reason for this is that automatic code detection requires a
|
|
|
2168 seekable input. Things will also fail if you open a decoding
|
|
|
2169 stream for reading using a non-fully-specified coding system and
|
|
|
2170 a non-seekable input stream. */
|
|
|
2171
|
|
|
2172 static Lisp_Object
|
|
|
2173 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
2174 CONST char *mode)
|
|
|
2175 {
|
|
|
2176 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
|
2177 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2178 Lisp_Object obj;
|
|
|
2179
|
|
|
2180 xzero (*str);
|
|
|
2181 str->other_end = stream;
|
|
|
2182 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
|
|
|
2183 str->eol_type = EOL_AUTODETECT;
|
|
|
2184 if (!strcmp (mode, "r")
|
|
|
2185 && Lstream_seekable_p (stream))
|
|
|
2186 /* We can determine the coding system now. */
|
|
|
2187 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
|
2188 set_decoding_stream_coding_system (lstr, codesys);
|
|
|
2189 str->decst.eol_type = str->eol_type;
|
|
|
2190 str->decst.mask = ~0;
|
|
|
2191 XSETLSTREAM (obj, lstr);
|
|
|
2192 return obj;
|
|
|
2193 }
|
|
|
2194
|
|
|
2195 Lisp_Object
|
|
|
2196 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2197 {
|
|
|
2198 return make_decoding_stream_1 (stream, codesys, "r");
|
|
|
2199 }
|
|
|
2200
|
|
|
2201 Lisp_Object
|
|
|
2202 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2203 {
|
|
|
2204 return make_decoding_stream_1 (stream, codesys, "w");
|
|
|
2205 }
|
|
|
2206
|
|
|
2207 /* Note: the decode_coding_* functions all take the same
|
|
|
2208 arguments as mule_decode(), which is to say some SRC data of
|
|
|
2209 size N, which is to be stored into dynamic array DST.
|
|
|
2210 DECODING is the stream within which the decoding is
|
|
|
2211 taking place, but no data is actually read from or
|
|
|
2212 written to that stream; that is handled in decoding_reader()
|
|
|
2213 or decoding_writer(). This allows the same functions to
|
|
|
2214 be used for both reading and writing. */
|
|
|
2215
|
|
|
2216 static void
|
|
|
2217 mule_decode (Lstream *decoding, CONST unsigned char *src,
|
|
|
2218 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2219 {
|
|
|
2220 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2221
|
|
|
2222 /* If necessary, do encoding-detection now. We do this when
|
|
|
2223 we're a writing stream or a non-seekable reading stream,
|
|
|
2224 meaning that we can't just process the whole input,
|
|
|
2225 rewind, and start over. */
|
|
|
2226
|
|
|
2227 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
|
2228 str->eol_type == EOL_AUTODETECT)
|
|
|
2229 {
|
|
|
2230 Lisp_Object codesys;
|
|
|
2231
|
|
|
2232 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
|
2233 detect_coding_type (&str->decst, src, n,
|
|
|
2234 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
|
2235 CODESYS_AUTODETECT);
|
|
|
2236 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
|
2237 str->decst.mask != ~0)
|
|
|
2238 /* #### This is cheesy. What we really ought to do is
|
|
|
2239 buffer up a certain amount of data so as to get a
|
|
|
2240 less random result. */
|
|
|
2241 codesys = coding_system_from_mask (str->decst.mask);
|
|
|
2242 str->eol_type = str->decst.eol_type;
|
|
|
2243 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
|
2244 {
|
|
|
2245 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
|
2246 If we erase it, bad things might happen. */
|
|
|
2247 int was_end = str->flags & CODING_STATE_END;
|
|
|
2248 set_decoding_stream_coding_system (decoding, codesys);
|
|
|
2249 if (was_end)
|
|
|
2250 str->flags |= CODING_STATE_END;
|
|
|
2251 }
|
|
|
2252 }
|
|
|
2253
|
|
|
2254 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2255 {
|
|
|
2256 #ifdef DEBUG_XEMACS
|
|
|
2257 case CODESYS_INTERNAL:
|
|
|
2258 Dynarr_add_many (dst, src, n);
|
|
|
2259 break;
|
|
|
2260 #endif
|
|
|
2261 case CODESYS_AUTODETECT:
|
|
|
2262 /* If we got this far and still haven't decided on the coding
|
|
|
2263 system, then do no conversion. */
|
|
|
2264 case CODESYS_NO_CONVERSION:
|
|
|
2265 decode_coding_no_conversion (decoding, src, dst, n);
|
|
|
2266 break;
|
|
|
2267 #ifdef MULE
|
|
|
2268 case CODESYS_SHIFT_JIS:
|
|
|
2269 decode_coding_sjis (decoding, src, dst, n);
|
|
|
2270 break;
|
|
|
2271 case CODESYS_BIG5:
|
|
|
2272 decode_coding_big5 (decoding, src, dst, n);
|
|
|
2273 break;
|
|
|
2274 case CODESYS_UCS4:
|
|
|
2275 decode_coding_ucs4 (decoding, src, dst, n);
|
|
|
2276 break;
|
|
|
2277 case CODESYS_UTF8:
|
|
|
2278 decode_coding_utf8 (decoding, src, dst, n);
|
|
|
2279 break;
|
|
|
2280 case CODESYS_CCL:
|
|
|
2281 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
|
2282 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_DECODING);
|
|
|
2283 break;
|
|
|
2284 case CODESYS_ISO2022:
|
|
|
2285 decode_coding_iso2022 (decoding, src, dst, n);
|
|
|
2286 break;
|
|
|
2287 #endif /* MULE */
|
|
|
2288 default:
|
|
|
2289 abort ();
|
|
|
2290 }
|
|
|
2291 }
|
|
|
2292
|
|
|
2293 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
2294 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
2295 This is useful if you've read in encoded text from a file without decoding
|
|
|
2296 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
2297 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
|
2298 Return length of decoded text.
|
|
|
2299 BUFFER defaults to the current buffer if unspecified.
|
|
|
2300 */
|
|
|
2301 (start, end, coding_system, buffer))
|
|
|
2302 {
|
|
|
2303 Bufpos b, e;
|
|
|
2304 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2305 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2306 Lstream *istr, *ostr;
|
|
|
2307 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2308
|
|
|
2309 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2310
|
|
|
2311 barf_if_buffer_read_only (buf, b, e);
|
|
|
2312
|
|
|
2313 coding_system = Fget_coding_system (coding_system);
|
|
|
2314 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2315 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2316 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2317 coding_system);
|
|
|
2318 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2319 Fget_coding_system (Qbinary));
|
|
|
2320 istr = XLSTREAM (instream);
|
|
|
2321 ostr = XLSTREAM (outstream);
|
|
|
2322 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
|
|
|
2323
|
|
|
2324 /* The chain of streams looks like this:
|
|
|
2325
|
|
|
2326 [BUFFER] <----- send through
|
|
|
2327 ------> [ENCODE AS BINARY]
|
|
|
2328 ------> [DECODE AS SPECIFIED]
|
|
|
2329 ------> [BUFFER]
|
|
|
2330 */
|
|
|
2331
|
|
|
2332 while (1)
|
|
|
2333 {
|
|
|
2334 char tempbuf[1024]; /* some random amount */
|
|
|
2335 Bufpos newpos, even_newer_pos;
|
|
|
2336 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2337 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2338
|
|
|
2339 if (!size_in_bytes)
|
|
|
2340 break;
|
|
|
2341 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2342 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2343 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2344 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2345 even_newer_pos, 0);
|
|
|
2346 }
|
|
|
2347 Lstream_close (istr);
|
|
|
2348 Lstream_close (ostr);
|
|
|
2349 UNGCPRO;
|
|
|
2350 Lstream_delete (istr);
|
|
|
2351 Lstream_delete (ostr);
|
|
|
2352 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2353 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2354 return Qnil;
|
|
|
2355 }
|
|
|
2356
|
|
|
2357
|
|
|
2358 /************************************************************************/
|
|
|
2359 /* Converting to an external encoding ("encoding") */
|
|
|
2360 /************************************************************************/
|
|
|
2361
|
|
|
2362 /* An encoding stream is an output stream. When you create the
|
|
|
2363 stream, you specify the coding system that governs the encoding
|
|
|
2364 and another stream that the resulting encoded data is to be
|
|
|
2365 sent to, and then start sending data to it. */
|
|
|
2366
|
|
|
2367 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
|
2368
|
|
|
2369 struct encoding_stream
|
|
|
2370 {
|
|
|
2371 /* Coding system that governs the conversion. */
|
|
|
2372 Lisp_Coding_System *codesys;
|
|
|
2373
|
|
|
2374 /* Stream that we read the encoded data from or
|
|
|
2375 write the decoded data to. */
|
|
|
2376 Lstream *other_end;
|
|
|
2377
|
|
|
2378 /* If we are reading, then we can return only a fixed amount of
|
|
|
2379 data, so if the conversion resulted in too much data, we store it
|
|
|
2380 here for retrieval the next time around. */
|
|
|
2381 unsigned_char_dynarr *runoff;
|
|
|
2382
|
|
|
2383 /* FLAGS holds flags indicating the current state of the encoding.
|
|
|
2384 Some of these flags are dependent on the coding system. */
|
|
|
2385 unsigned int flags;
|
|
|
2386
|
|
|
2387 /* CH holds a partially built-up character. Since we only deal
|
|
|
2388 with one- and two-byte characters at the moment, we only use
|
|
|
2389 this to store the first byte of a two-byte character. */
|
|
|
2390 unsigned int ch;
|
|
|
2391 #ifdef MULE
|
|
|
2392 /* Additional information used by the ISO2022 encoder. */
|
|
|
2393 struct
|
|
|
2394 {
|
|
|
2395 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
2396 through G3 registers. It is initialized from the array
|
|
|
2397 INITIAL_CHARSET in CODESYS. */
|
|
|
2398 Lisp_Object charset[4];
|
|
|
2399
|
|
|
2400 /* Which registers are currently invoked into the left (GL) and
|
|
|
2401 right (GR) halves of the 8-bit encoding space? */
|
|
|
2402 int register_left, register_right;
|
|
|
2403
|
|
|
2404 /* Whether we need to explicitly designate the charset in the
|
|
|
2405 G? register before using it. It is initialized from the
|
|
|
2406 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
|
2407 unsigned char force_charset_on_output[4];
|
|
|
2408
|
|
|
2409 /* Other state variables that need to be preserved across
|
|
|
2410 invocations. */
|
|
|
2411 Lisp_Object current_charset;
|
|
|
2412 int current_half;
|
|
|
2413 int current_char_boundary;
|
|
|
2414 } iso2022;
|
|
|
2415
|
|
|
2416 /* Additional information (the state of the running CCL program)
|
|
|
2417 used by the CCL encoder. */
|
|
|
2418 struct ccl_program ccl;
|
|
|
2419 #endif /* MULE */
|
|
|
2420 };
|
|
|
2421
|
|
|
2422 static ssize_t encoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
|
2423 static ssize_t encoding_writer (Lstream *stream, CONST unsigned char *data,
|
|
|
2424 size_t size);
|
|
|
2425 static int encoding_rewinder (Lstream *stream);
|
|
|
2426 static int encoding_seekable_p (Lstream *stream);
|
|
|
2427 static int encoding_flusher (Lstream *stream);
|
|
|
2428 static int encoding_closer (Lstream *stream);
|
|
|
2429
|
|
|
2430 static Lisp_Object encoding_marker (Lisp_Object stream);
|
|
|
2431
|
|
|
2432 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
|
2433 sizeof (struct encoding_stream));
|
|
|
2434
|
|
|
2435 static Lisp_Object
|
|
|
2436 encoding_marker (Lisp_Object stream)
|
|
|
2437 {
|
|
|
2438 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2439 Lisp_Object str_obj;
|
|
|
2440
|
|
|
2441 /* We do not need to mark the coding systems or charsets stored
|
|
|
2442 within the stream because they are stored in a global list
|
|
|
2443 and automatically marked. */
|
|
|
2444
|
|
|
2445 XSETLSTREAM (str_obj, str);
|
|
|
2446 mark_object (str_obj);
|
|
|
2447 if (str->imp->marker)
|
|
|
2448 return (str->imp->marker) (str_obj);
|
|
|
2449 else
|
|
|
2450 return Qnil;
|
|
|
2451 }
|
|
|
2452
|
|
|
2453 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
|
2454 so we read data from the other end, encode it, and store it into DATA. */
|
|
|
2455
|
|
|
2456 static ssize_t
|
|
|
2457 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
|
2458 {
|
|
|
2459 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2460 unsigned char *orig_data = data;
|
|
|
2461 ssize_t read_size;
|
|
|
2462 int error_occurred = 0;
|
|
|
2463
|
|
|
2464 /* We need to interface to mule_encode(), which expects to take some
|
|
|
2465 amount of data and store the result into a Dynarr. We have
|
|
|
2466 mule_encode() store into str->runoff, and take data from there
|
|
|
2467 as necessary. */
|
|
|
2468
|
|
|
2469 /* We loop until we have enough data, reading chunks from the other
|
|
|
2470 end and encoding it. */
|
|
|
2471 while (1)
|
|
|
2472 {
|
|
|
2473 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2474 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2475 if (Dynarr_length (str->runoff) > 0)
|
|
|
2476 {
|
|
|
2477 int chunk = min ((int) size, Dynarr_length (str->runoff));
|
|
|
2478 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2479 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2480 data += chunk;
|
|
|
2481 size -= chunk;
|
|
|
2482 }
|
|
|
2483
|
|
|
2484 if (size == 0)
|
|
|
2485 break; /* No more room for data */
|
|
|
2486
|
|
|
2487 if (str->flags & CODING_STATE_END)
|
|
|
2488 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2489 the other end. We loop once more so that mule_encode() can
|
|
|
2490 output any final stuff it may be holding, or any "go back
|
|
|
2491 to a sane state" escape sequences. (This latter makes sense
|
|
|
2492 during encoding.) */
|
|
|
2493 break;
|
|
|
2494
|
|
|
2495 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
|
2496 left of storage in it, so it's OK to read directly into it.
|
|
|
2497 (We'll be overwriting above, after we've encoded it into the
|
|
|
2498 runoff.) */
|
|
|
2499 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2500 if (read_size < 0)
|
|
|
2501 {
|
|
|
2502 error_occurred = 1;
|
|
|
2503 break;
|
|
|
2504 }
|
|
|
2505 if (read_size == 0)
|
|
|
2506 /* There might be some more end data produced in the translation.
|
|
|
2507 See the comment above. */
|
|
|
2508 str->flags |= CODING_STATE_END;
|
|
|
2509 mule_encode (stream, data, str->runoff, read_size);
|
|
|
2510 }
|
|
|
2511
|
|
|
2512 if (data == orig_data)
|
|
|
2513 return error_occurred ? -1 : 0;
|
|
|
2514 else
|
|
|
2515 return data - orig_data;
|
|
|
2516 }
|
|
|
2517
|
|
|
2518 static ssize_t
|
|
|
2519 encoding_writer (Lstream *stream, CONST unsigned char *data, size_t size)
|
|
|
2520 {
|
|
|
2521 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2522 ssize_t retval;
|
|
|
2523
|
|
|
2524 /* Encode all our data into the runoff, and then attempt to write
|
|
|
2525 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2526 in writing. */
|
|
|
2527 mule_encode (stream, data, str->runoff, size);
|
|
|
2528 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2529 Dynarr_length (str->runoff));
|
|
|
2530 if (retval > 0)
|
|
|
2531 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2532 /* Do NOT return retval. The return value indicates how much
|
|
|
2533 of the incoming data was written, not how many bytes were
|
|
|
2534 written. */
|
|
|
2535 return size;
|
|
|
2536 }
|
|
|
2537
|
|
|
2538 static void
|
|
|
2539 reset_encoding_stream (struct encoding_stream *str)
|
|
|
2540 {
|
|
|
2541 #ifdef MULE
|
|
|
2542 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2543 {
|
|
|
2544 case CODESYS_ISO2022:
|
|
|
2545 {
|
|
|
2546 int i;
|
|
|
2547
|
|
|
2548 for (i = 0; i < 4; i++)
|
|
|
2549 {
|
|
|
2550 str->iso2022.charset[i] =
|
|
|
2551 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
|
2552 str->iso2022.force_charset_on_output[i] =
|
|
|
2553 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
|
2554 }
|
|
|
2555 str->iso2022.register_left = 0;
|
|
|
2556 str->iso2022.register_right = 1;
|
|
|
2557 str->iso2022.current_charset = Qnil;
|
|
|
2558 str->iso2022.current_half = 0;
|
|
|
2559 str->iso2022.current_char_boundary = 1;
|
|
|
2560 break;
|
|
|
2561 }
|
|
|
2562 case CODESYS_CCL:
|
|
|
2563 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
|
|
|
2564 break;
|
|
|
2565 default:
|
|
|
2566 break;
|
|
|
2567 }
|
|
|
2568 #endif /* MULE */
|
|
|
2569
|
|
|
2570 str->flags = str->ch = 0;
|
|
|
2571 }
|
|
|
2572
|
|
|
2573 static int
|
|
|
2574 encoding_rewinder (Lstream *stream)
|
|
|
2575 {
|
|
|
2576 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2577 reset_encoding_stream (str);
|
|
|
2578 Dynarr_reset (str->runoff);
|
|
|
2579 return Lstream_rewind (str->other_end);
|
|
|
2580 }
|
|
|
2581
|
|
|
2582 static int
|
|
|
2583 encoding_seekable_p (Lstream *stream)
|
|
|
2584 {
|
|
|
2585 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2586 return Lstream_seekable_p (str->other_end);
|
|
|
2587 }
|
|
|
2588
|
|
|
2589 static int
|
|
|
2590 encoding_flusher (Lstream *stream)
|
|
|
2591 {
|
|
|
2592 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2593 return Lstream_flush (str->other_end);
|
|
|
2594 }
|
|
|
2595
|
|
|
2596 static int
|
|
|
2597 encoding_closer (Lstream *stream)
|
|
|
2598 {
|
|
|
2599 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2600 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2601 {
|
|
|
2602 str->flags |= CODING_STATE_END;
|
|
|
2603 encoding_writer (stream, 0, 0);
|
|
|
2604 }
|
|
|
2605 Dynarr_free (str->runoff);
|
|
|
2606 return Lstream_close (str->other_end);
|
|
|
2607 }
|
|
|
2608
|
|
|
2609 Lisp_Object
|
|
|
2610 encoding_stream_coding_system (Lstream *stream)
|
|
|
2611 {
|
|
|
2612 Lisp_Object coding_system;
|
|
|
2613 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2614
|
|
|
2615 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2616 return coding_system;
|
|
|
2617 }
|
|
|
2618
|
|
|
2619 void
|
|
|
2620 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2621 {
|
|
|
2622 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
2623 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2624 str->codesys = cs;
|
|
|
2625 reset_encoding_stream (str);
|
|
|
2626 }
|
|
|
2627
|
|
|
2628 static Lisp_Object
|
|
|
2629 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
|
2630 CONST char *mode)
|
|
|
2631 {
|
|
|
2632 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
|
2633 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2634 Lisp_Object obj;
|
|
|
2635
|
|
|
2636 xzero (*str);
|
|
|
2637 str->runoff = Dynarr_new (unsigned_char);
|
|
|
2638 str->other_end = stream;
|
|
|
2639 set_encoding_stream_coding_system (lstr, codesys);
|
|
|
2640 XSETLSTREAM (obj, lstr);
|
|
|
2641 return obj;
|
|
|
2642 }
|
|
|
2643
|
|
|
2644 Lisp_Object
|
|
|
2645 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2646 {
|
|
|
2647 return make_encoding_stream_1 (stream, codesys, "r");
|
|
|
2648 }
|
|
|
2649
|
|
|
2650 Lisp_Object
|
|
|
2651 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2652 {
|
|
|
2653 return make_encoding_stream_1 (stream, codesys, "w");
|
|
|
2654 }
|
|
|
2655
|
|
|
2656 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
|
2657 external format, according to the encoding stream ENCODING.
|
|
|
2658 Store the encoded data into DST. */
|
|
|
2659
|
|
|
2660 static void
|
|
|
2661 mule_encode (Lstream *encoding, CONST unsigned char *src,
|
|
|
2662 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2663 {
|
|
|
2664 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2665
|
|
|
2666 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2667 {
|
|
|
2668 #ifdef DEBUG_XEMACS
|
|
|
2669 case CODESYS_INTERNAL:
|
|
|
2670 Dynarr_add_many (dst, src, n);
|
|
|
2671 break;
|
|
|
2672 #endif
|
|
|
2673 case CODESYS_AUTODETECT:
|
|
|
2674 /* If we got this far and still haven't decided on the coding
|
|
|
2675 system, then do no conversion. */
|
|
|
2676 case CODESYS_NO_CONVERSION:
|
|
|
2677 encode_coding_no_conversion (encoding, src, dst, n);
|
|
|
2678 break;
|
|
|
2679 #ifdef MULE
|
|
|
2680 case CODESYS_SHIFT_JIS:
|
|
|
2681 encode_coding_sjis (encoding, src, dst, n);
|
|
|
2682 break;
|
|
|
2683 case CODESYS_BIG5:
|
|
|
2684 encode_coding_big5 (encoding, src, dst, n);
|
|
|
2685 break;
|
|
|
2686 case CODESYS_UCS4:
|
|
|
2687 encode_coding_ucs4 (encoding, src, dst, n);
|
|
|
2688 break;
|
|
|
2689 case CODESYS_UTF8:
|
|
|
2690 encode_coding_utf8 (encoding, src, dst, n);
|
|
|
2691 break;
|
|
|
2692 case CODESYS_CCL:
|
|
|
2693 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
|
2694 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_ENCODING);
|
|
|
2695 break;
|
|
|
2696 case CODESYS_ISO2022:
|
|
|
2697 encode_coding_iso2022 (encoding, src, dst, n);
|
|
|
2698 break;
|
|
|
2699 #endif /* MULE */
|
|
|
2700 default:
|
|
|
2701 abort ();
|
|
|
2702 }
|
|
|
2703 }
|
|
|
2704
|
|
|
2705 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2706 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2707 This will, for example, convert Japanese characters into stuff such as
|
|
|
2708 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
|
2709 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2710 */
|
|
|
2711 (start, end, coding_system, buffer))
|
|
|
2712 {
|
|
|
2713 Bufpos b, e;
|
|
|
2714 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2715 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2716 Lstream *istr, *ostr;
|
|
|
2717 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2718
|
|
|
2719 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2720
|
|
|
2721 barf_if_buffer_read_only (buf, b, e);
|
|
|
2722
|
|
|
2723 coding_system = Fget_coding_system (coding_system);
|
|
|
2724 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2725 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2726 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2727 Fget_coding_system (Qbinary));
|
|
|
2728 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2729 coding_system);
|
|
|
2730 istr = XLSTREAM (instream);
|
|
|
2731 ostr = XLSTREAM (outstream);
|
|
|
2732 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
|
|
|
2733 /* The chain of streams looks like this:
|
|
|
2734
|
|
|
2735 [BUFFER] <----- send through
|
|
|
2736 ------> [ENCODE AS SPECIFIED]
|
|
|
2737 ------> [DECODE AS BINARY]
|
|
|
2738 ------> [BUFFER]
|
|
|
2739 */
|
|
|
2740 while (1)
|
|
|
2741 {
|
|
|
2742 char tempbuf[1024]; /* some random amount */
|
|
|
2743 Bufpos newpos, even_newer_pos;
|
|
|
2744 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2745 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2746
|
|
|
2747 if (!size_in_bytes)
|
|
|
2748 break;
|
|
|
2749 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2750 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2751 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2752 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2753 even_newer_pos, 0);
|
|
|
2754 }
|
|
|
2755
|
|
|
2756 {
|
|
|
2757 Charcount retlen =
|
|
|
2758 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2759 Lstream_close (istr);
|
|
|
2760 Lstream_close (ostr);
|
|
|
2761 UNGCPRO;
|
|
|
2762 Lstream_delete (istr);
|
|
|
2763 Lstream_delete (ostr);
|
|
|
2764 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2765 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2766 return make_int (retlen);
|
|
|
2767 }
|
|
|
2768 }
|
|
|
2769
|
|
|
2770 #ifdef MULE
|
|
|
2771
|
|
|
2772 /************************************************************************/
|
|
|
2773 /* Shift-JIS methods */
|
|
|
2774 /************************************************************************/
|
|
|
2775
|
|
|
2776 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
|
2777 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
|
|
2778 as is. A character of JISX0201-Kana (DIMENSION1_CHARS94 character set) is
|
|
|
2779 encoded by "position-code + 0x80". A character of JISX0208
|
|
|
2780 (DIMENSION2_CHARS94 character set) is encoded in 2-byte but two
|
|
|
2781 position-codes are divided and shifted so that it fit in the range
|
|
|
2782 below.
|
|
|
2783
|
|
|
2784 --- CODE RANGE of Shift-JIS ---
|
|
|
2785 (character set) (range)
|
|
|
2786 ASCII 0x00 .. 0x7F
|
|
|
2787 JISX0201-Kana 0xA0 .. 0xDF
|
|
|
2788 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
|
2789 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
|
2790 -------------------------------
|
|
|
2791
|
|
|
2792 */
|
|
|
2793
|
|
|
2794 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
|
2795
|
|
|
2796 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
|
|
|
2797 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
|
2798
|
|
|
2799 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2800
|
|
|
2801 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
|
|
|
2802 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
|
2803
|
|
|
2804 #define BYTE_SJIS_KATAKANA_P(c) \
|
|
|
2805 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
|
2806
|
|
|
2807 static int
|
|
|
2808 detect_coding_sjis (struct detection_state *st, CONST unsigned char *src,
|
|
|
2809 unsigned int n)
|
|
|
2810 {
|
|
|
2811 int c;
|
|
|
2812
|
|
|
2813 while (n--)
|
|
|
2814 {
|
|
|
2815 c = *src++;
|
|
|
2816 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
2817 return 0;
|
|
|
2818 if (st->shift_jis.in_second_byte)
|
|
|
2819 {
|
|
|
2820 st->shift_jis.in_second_byte = 0;
|
|
|
2821 if (c < 0x40)
|
|
|
2822 return 0;
|
|
|
2823 }
|
|
|
2824 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
|
2825 st->shift_jis.in_second_byte = 1;
|
|
|
2826 }
|
|
|
2827 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
|
2828 }
|
|
|
2829
|
|
|
2830 /* Convert Shift-JIS data to internal format. */
|
|
|
2831
|
|
|
2832 static void
|
|
|
2833 decode_coding_sjis (Lstream *decoding, CONST unsigned char *src,
|
|
|
2834 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2835 {
|
|
|
2836 unsigned char c;
|
|
|
2837 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2838 unsigned int flags = str->flags;
|
|
|
2839 unsigned int ch = str->ch;
|
|
|
2840 eol_type_t eol_type = str->eol_type;
|
|
|
2841
|
|
|
2842 while (n--)
|
|
|
2843 {
|
|
|
2844 c = *src++;
|
|
|
2845
|
|
|
2846 if (ch)
|
|
|
2847 {
|
|
|
2848 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
|
2849 if (BYTE_SJIS_TWO_BYTE_2_P (c))
|
|
|
2850 {
|
|
|
2851 unsigned char e1, e2;
|
|
|
2852
|
|
|
2853 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
2854 DECODE_SJIS (ch, c, e1, e2);
|
|
|
2855 Dynarr_add (dst, e1);
|
|
|
2856 Dynarr_add (dst, e2);
|
|
|
2857 }
|
|
|
2858 else
|
|
|
2859 {
|
|
|
2860 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
2861 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2862 }
|
|
|
2863 ch = 0;
|
|
|
2864 }
|
|
|
2865 else
|
|
|
2866 {
|
|
|
2867 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
2868 if (BYTE_SJIS_TWO_BYTE_1_P (c))
|
|
|
2869 ch = c;
|
|
|
2870 else if (BYTE_SJIS_KATAKANA_P (c))
|
|
|
2871 {
|
|
|
2872 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
|
|
|
2873 Dynarr_add (dst, c);
|
|
|
2874 }
|
|
|
2875 else
|
|
|
2876 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2877 }
|
|
|
2878 label_continue_loop:;
|
|
|
2879 }
|
|
|
2880
|
|
|
2881 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
2882
|
|
|
2883 str->flags = flags;
|
|
|
2884 str->ch = ch;
|
|
|
2885 }
|
|
|
2886
|
|
|
2887 /* Convert internally-formatted data to Shift-JIS. */
|
|
|
2888
|
|
|
2889 static void
|
|
|
2890 encode_coding_sjis (Lstream *encoding, CONST unsigned char *src,
|
|
|
2891 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2892 {
|
|
|
2893 unsigned char c;
|
|
|
2894 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2895 unsigned int flags = str->flags;
|
|
|
2896 unsigned int ch = str->ch;
|
|
|
2897 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
2898
|
|
|
2899 while (n--)
|
|
|
2900 {
|
|
|
2901 c = *src++;
|
|
|
2902 if (c == '\n')
|
|
|
2903 {
|
|
|
2904 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
2905 Dynarr_add (dst, '\r');
|
|
|
2906 if (eol_type != EOL_CR)
|
|
|
2907 Dynarr_add (dst, '\n');
|
|
|
2908 ch = 0;
|
|
|
2909 }
|
|
|
2910 else if (BYTE_ASCII_P (c))
|
|
|
2911 {
|
|
|
2912 Dynarr_add (dst, c);
|
|
|
2913 ch = 0;
|
|
|
2914 }
|
|
|
2915 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
2916 ch = (c == LEADING_BYTE_KATAKANA_JISX0201 ||
|
|
|
2917 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2918 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
|
2919 else if (ch)
|
|
|
2920 {
|
|
|
2921 if (ch == LEADING_BYTE_KATAKANA_JISX0201)
|
|
|
2922 {
|
|
|
2923 Dynarr_add (dst, c);
|
|
|
2924 ch = 0;
|
|
|
2925 }
|
|
|
2926 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
2927 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
|
2928 ch = c;
|
|
|
2929 else
|
|
|
2930 {
|
|
|
2931 unsigned char j1, j2;
|
|
|
2932 ENCODE_SJIS (ch, c, j1, j2);
|
|
|
2933 Dynarr_add (dst, j1);
|
|
|
2934 Dynarr_add (dst, j2);
|
|
|
2935 ch = 0;
|
|
|
2936 }
|
|
|
2937 }
|
|
|
2938 }
|
|
|
2939
|
|
|
2940 str->flags = flags;
|
|
|
2941 str->ch = ch;
|
|
|
2942 }
|
|
|
2943
|
|
|
2944 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
|
2945 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
|
2946 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
|
2947 Return the corresponding character.
|
|
|
2948 */
|
|
|
2949 (code))
|
|
|
2950 {
|
|
|
2951 unsigned char c1, c2, s1, s2;
|
|
|
2952
|
|
|
2953 CHECK_CONS (code);
|
|
|
2954 CHECK_INT (XCAR (code));
|
|
|
2955 CHECK_INT (XCDR (code));
|
|
|
2956 s1 = XINT (XCAR (code));
|
|
|
2957 s2 = XINT (XCDR (code));
|
|
|
2958 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
|
|
|
2959 BYTE_SJIS_TWO_BYTE_2_P (s2))
|
|
|
2960 {
|
|
|
2961 DECODE_SJIS (s1, s2, c1, c2);
|
|
|
2962 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
|
2963 c1 & 0x7F, c2 & 0x7F));
|
|
|
2964 }
|
|
|
2965 else
|
|
|
2966 return Qnil;
|
|
|
2967 }
|
|
|
2968
|
|
|
2969 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
|
2970 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
|
2971 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
|
2972 */
|
|
|
2973 (ch))
|
|
|
2974 {
|
|
|
2975 Lisp_Object charset;
|
|
|
2976 int c1, c2, s1, s2;
|
|
|
2977
|
|
|
2978 CHECK_CHAR_COERCE_INT (ch);
|
|
|
2979 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
2980 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
|
2981 {
|
|
|
2982 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
|
2983 return Fcons (make_int (s1), make_int (s2));
|
|
|
2984 }
|
|
|
2985 else
|
|
|
2986 return Qnil;
|
|
|
2987 }
|
|
|
2988
|
|
|
2989
|
|
|
2990 /************************************************************************/
|
|
|
2991 /* Big5 methods */
|
|
|
2992 /************************************************************************/
|
|
|
2993
|
|
|
2994 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
|
2995 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
|
2996 character set and is encoded in two-byte.
|
|
|
2997
|
|
|
2998 --- CODE RANGE of BIG5 ---
|
|
|
2999 (character set) (range)
|
|
|
3000 ASCII 0x00 .. 0x7F
|
|
|
3001 Big5 (1st byte) 0xA1 .. 0xFE
|
|
|
3002 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
|
3003 --------------------------
|
|
|
3004
|
|
|
3005 Since the number of characters in Big5 is larger than maximum
|
|
|
3006 characters in Emacs' charset (96x96), it can't be handled as one
|
|
|
3007 charset. So, in Emacs, Big5 is divided into two: `charset-big5-1'
|
|
|
3008 and `charset-big5-2'. Both <type>s are DIMENSION2_CHARS94. The former
|
|
|
3009 contains frequently used characters and the latter contains less
|
|
|
3010 frequently used characters. */
|
|
|
3011
|
|
|
3012 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
|
3013 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
|
3014
|
|
|
3015 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
3016
|
|
|
3017 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
|
3018 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
|
3019
|
|
|
3020 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
|
3021
|
|
|
3022 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
|
3023
|
|
|
3024 /* Code conversion macros. These are macros because they are used in
|
|
|
3025 inner loops during code conversion.
|
|
|
3026
|
|
|
3027 Note that temporary variables in macros introduce the classic
|
|
|
3028 dynamic-scoping problems with variable names. We use capital-
|
|
|
3029 lettered variables in the assumption that XEmacs does not use
|
|
|
3030 capital letters in variables except in a very formalized way
|
|
|
3031 (e.g. Qstring). */
|
|
|
3032
|
|
|
3033 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
|
3034 (lb, c1, c2). */
|
|
|
3035
|
|
|
3036 /* There is a much simpler way to split the Big5 charset into two.
|
|
|
3037 For the moment I'm going to leave the algorithm as-is because it
|
|
|
3038 claims to separate out the most-used characters into a single
|
|
|
3039 charset, which perhaps will lead to optimizations in various
|
|
|
3040 places.
|
|
|
3041
|
|
|
3042 The way the algorithm works is something like this:
|
|
|
3043
|
|
|
3044 Big5 can be viewed as a 94x157 charset, where the row is
|
|
|
3045 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
|
3046 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
|
3047 the split between low and high column numbers is apparently
|
|
|
3048 meaningless; ascending rows produce less and less frequent chars.
|
|
|
3049 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
|
3050 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
|
3051 second. To do the conversion, we convert the character into
|
|
|
3052 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
|
3053 is the second, etc. That way, the characters are ordered by
|
|
|
3054 decreasing frequency. Then we just chop the space in two
|
|
|
3055 and coerce the result into a 94x94 space.
|
|
|
3056 */
|
|
|
3057
|
|
|
3058 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
|
3059 { \
|
|
|
3060 int B1 = b1, B2 = b2; \
|
|
|
3061 unsigned int I \
|
|
|
3062 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
|
3063 \
|
|
|
3064 if (B1 < 0xC9) \
|
|
|
3065 { \
|
|
|
3066 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
|
3067 } \
|
|
|
3068 else \
|
|
|
3069 { \
|
|
|
3070 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
|
3071 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
|
3072 } \
|
|
|
3073 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
|
3074 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
|
3075 } while (0)
|
|
|
3076
|
|
|
3077 /* Convert the internal string representation of a Big5 character
|
|
|
3078 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
|
3079
|
|
|
3080 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
|
3081 { \
|
|
|
3082 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
|
3083 \
|
|
|
3084 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
|
3085 { \
|
|
|
3086 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
|
3087 } \
|
|
|
3088 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
|
3089 b2 = I % BIG5_SAME_ROW; \
|
|
|
3090 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
|
3091 } while (0)
|
|
|
3092
|
|
|
3093 static int
|
|
|
3094 detect_coding_big5 (struct detection_state *st, CONST unsigned char *src,
|
|
|
3095 unsigned int n)
|
|
|
3096 {
|
|
|
3097 int c;
|
|
|
3098
|
|
|
3099 while (n--)
|
|
|
3100 {
|
|
|
3101 c = *src++;
|
|
|
3102 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
|
3103 (c >= 0x80 && c <= 0xA0))
|
|
|
3104 return 0;
|
|
|
3105 if (st->big5.in_second_byte)
|
|
|
3106 {
|
|
|
3107 st->big5.in_second_byte = 0;
|
|
|
3108 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
|
3109 return 0;
|
|
|
3110 }
|
|
|
3111 else if (c >= 0xA1)
|
|
|
3112 st->big5.in_second_byte = 1;
|
|
|
3113 }
|
|
|
3114 return CODING_CATEGORY_BIG5_MASK;
|
|
|
3115 }
|
|
|
3116
|
|
|
3117 /* Convert Big5 data to internal format. */
|
|
|
3118
|
|
|
3119 static void
|
|
|
3120 decode_coding_big5 (Lstream *decoding, CONST unsigned char *src,
|
|
|
3121 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3122 {
|
|
|
3123 unsigned char c;
|
|
|
3124 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3125 unsigned int flags = str->flags;
|
|
|
3126 unsigned int ch = str->ch;
|
|
|
3127 eol_type_t eol_type = str->eol_type;
|
|
|
3128
|
|
|
3129 while (n--)
|
|
|
3130 {
|
|
|
3131 c = *src++;
|
|
|
3132 if (ch)
|
|
|
3133 {
|
|
|
3134 /* Previous character was first byte of Big5 char. */
|
|
|
3135 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
|
3136 {
|
|
|
3137 unsigned char b1, b2, b3;
|
|
|
3138 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
|
3139 Dynarr_add (dst, b1);
|
|
|
3140 Dynarr_add (dst, b2);
|
|
|
3141 Dynarr_add (dst, b3);
|
|
|
3142 }
|
|
|
3143 else
|
|
|
3144 {
|
|
|
3145 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
3146 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3147 }
|
|
|
3148 ch = 0;
|
|
|
3149 }
|
|
|
3150 else
|
|
|
3151 {
|
|
|
3152 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3153 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
|
3154 ch = c;
|
|
|
3155 else
|
|
|
3156 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3157 }
|
|
|
3158 label_continue_loop:;
|
|
|
3159 }
|
|
|
3160
|
|
|
3161 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
3162
|
|
|
3163 str->flags = flags;
|
|
|
3164 str->ch = ch;
|
|
|
3165 }
|
|
|
3166
|
|
|
3167 /* Convert internally-formatted data to Big5. */
|
|
|
3168
|
|
|
3169 static void
|
|
|
3170 encode_coding_big5 (Lstream *encoding, CONST unsigned char *src,
|
|
|
3171 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3172 {
|
|
|
3173 unsigned char c;
|
|
|
3174 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3175 unsigned int flags = str->flags;
|
|
|
3176 unsigned int ch = str->ch;
|
|
|
3177 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3178
|
|
|
3179 while (n--)
|
|
|
3180 {
|
|
|
3181 c = *src++;
|
|
|
3182 if (c == '\n')
|
|
|
3183 {
|
|
|
3184 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3185 Dynarr_add (dst, '\r');
|
|
|
3186 if (eol_type != EOL_CR)
|
|
|
3187 Dynarr_add (dst, '\n');
|
|
|
3188 }
|
|
|
3189 else if (BYTE_ASCII_P (c))
|
|
|
3190 {
|
|
|
3191 /* ASCII. */
|
|
|
3192 Dynarr_add (dst, c);
|
|
|
3193 }
|
|
|
3194 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
3195 {
|
|
|
3196 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3197 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3198 {
|
|
|
3199 /* A recognized leading byte. */
|
|
|
3200 ch = c;
|
|
|
3201 continue; /* not done with this character. */
|
|
|
3202 }
|
|
|
3203 /* otherwise just ignore this character. */
|
|
|
3204 }
|
|
|
3205 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3206 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3207 {
|
|
|
3208 /* Previous char was a recognized leading byte. */
|
|
|
3209 ch = (ch << 8) | c;
|
|
|
3210 continue; /* not done with this character. */
|
|
|
3211 }
|
|
|
3212 else if (ch)
|
|
|
3213 {
|
|
|
3214 /* Encountering second byte of a Big5 character. */
|
|
|
3215 unsigned char b1, b2;
|
|
|
3216
|
|
|
3217 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
|
3218 Dynarr_add (dst, b1);
|
|
|
3219 Dynarr_add (dst, b2);
|
|
|
3220 }
|
|
|
3221
|
|
|
3222 ch = 0;
|
|
|
3223 }
|
|
|
3224
|
|
|
3225 str->flags = flags;
|
|
|
3226 str->ch = ch;
|
|
|
3227 }
|
|
|
3228
|
|
|
3229
|
|
|
3230 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
|
3231 Decode a Big5 character CODE of BIG5 coding-system.
|
|
|
3232 CODE is the character code in BIG5, a cons of two integers.
|
|
|
3233 Return the corresponding character.
|
|
|
3234 */
|
|
|
3235 (code))
|
|
|
3236 {
|
|
|
3237 unsigned char c1, c2, b1, b2;
|
|
|
3238
|
|
|
3239 CHECK_CONS (code);
|
|
|
3240 CHECK_INT (XCAR (code));
|
|
|
3241 CHECK_INT (XCDR (code));
|
|
|
3242 b1 = XINT (XCAR (code));
|
|
|
3243 b2 = XINT (XCDR (code));
|
|
|
3244 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
|
3245 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
|
3246 {
|
|
|
3247 int leading_byte;
|
|
|
3248 Lisp_Object charset;
|
|
|
3249 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
|
|
|
3250 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
|
|
|
3251 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
|
3252 }
|
|
|
3253 else
|
|
|
3254 return Qnil;
|
|
|
3255 }
|
|
|
3256
|
|
|
3257 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
|
3258 Encode the Big5 character CH to BIG5 coding-system.
|
|
|
3259 Return the corresponding character code in Big5.
|
|
|
3260 */
|
|
|
3261 (ch))
|
|
|
3262 {
|
|
|
3263 Lisp_Object charset;
|
|
|
3264 int c1, c2, b1, b2;
|
|
|
3265
|
|
|
3266 CHECK_CHAR_COERCE_INT (ch);
|
|
|
3267 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
3268 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
|
3269 EQ (charset, Vcharset_chinese_big5_2))
|
|
|
3270 {
|
|
|
3271 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
|
3272 b1, b2);
|
|
|
3273 return Fcons (make_int (b1), make_int (b2));
|
|
|
3274 }
|
|
|
3275 else
|
|
|
3276 return Qnil;
|
|
|
3277 }
|
|
|
3278
|
|
|
3279
|
|
|
3280 /************************************************************************/
|
|
|
3281 /* UCS-4 methods */
|
|
|
3282 /* */
|
|
|
3283 /* UCS-4 character codes are implemented as nonnegative integers. */
|
|
|
3284 /* */
|
|
|
3285 /************************************************************************/
|
|
|
3286
|
|
|
3287
|
|
|
3288 DEFUN ("set-ucs-char", Fset_ucs_char, 2, 2, 0, /*
|
|
|
3289 Map UCS-4 code CODE to Mule character CHARACTER.
|
|
|
3290
|
|
|
3291 Return T on success, NIL on failure.
|
|
|
3292 */
|
|
|
3293 (code, character))
|
|
|
3294 {
|
|
|
3295 unsigned int c;
|
|
|
3296
|
|
|
3297 CHECK_CHAR (character);
|
|
|
3298 CHECK_INT (code);
|
|
|
3299 c = XINT (code);
|
|
|
3300
|
|
|
3301 if (c < sizeof (fcd->ucs_to_mule_table))
|
|
|
3302 {
|
|
|
3303 fcd->ucs_to_mule_table[c] = character;
|
|
|
3304 return Qt;
|
|
|
3305 }
|
|
|
3306 else
|
|
|
3307 return Qnil;
|
|
|
3308 }
|
|
|
3309
|
|
|
3310 static Lisp_Object
|
|
|
3311 ucs_to_char (unsigned long code)
|
|
|
3312 {
|
|
|
3313 if (code < sizeof (fcd->ucs_to_mule_table))
|
|
|
3314 {
|
|
|
3315 return fcd->ucs_to_mule_table[code];
|
|
|
3316 }
|
|
|
3317 else if ((0xe00000 <= code) && (code <= 0xe00000 + 94 * 94 * 14))
|
|
|
3318 {
|
|
|
3319 unsigned int c;
|
|
|
3320
|
|
|
3321 code -= 0xe00000;
|
|
|
3322 c = code % (94 * 94);
|
|
|
3323 return make_char
|
|
|
3324 (MAKE_CHAR (CHARSET_BY_ATTRIBUTES
|
|
|
3325 (CHARSET_TYPE_94X94, code / (94 * 94) + '@',
|
|
|
3326 CHARSET_LEFT_TO_RIGHT),
|
|
|
3327 c / 94 + 33, c % 94 + 33));
|
|
|
3328 }
|
|
|
3329 else
|
|
|
3330 return Qnil;
|
|
|
3331 }
|
|
|
3332
|
|
|
3333 DEFUN ("ucs-char", Fucs_char, 1, 1, 0, /*
|
|
|
3334 Return Mule character corresponding to UCS code CODE (a positive integer).
|
|
|
3335 */
|
|
|
3336 (code))
|
|
|
3337 {
|
|
|
3338 CHECK_NATNUM (code);
|
|
|
3339 return ucs_to_char (XINT (code));
|
|
|
3340 }
|
|
|
3341
|
|
|
3342 DEFUN ("set-char-ucs", Fset_char_ucs, 2, 2, 0, /*
|
|
|
3343 Map Mule character CHARACTER to UCS code CODE (a positive integer).
|
|
|
3344 */
|
|
|
3345 (character, code))
|
|
|
3346 {
|
|
|
3347 /* #### Isn't this gilding the lily? Fput_char_table checks its args.
|
|
|
3348 Fset_char_ucs is more restrictive on index arg, but should
|
|
|
3349 check code arg in a char_table method. */
|
|
|
3350 CHECK_CHAR (character);
|
|
|
3351 CHECK_NATNUM (code);
|
|
|
3352 return Fput_char_table (character, code, mule_to_ucs_table);
|
|
|
3353 }
|
|
|
3354
|
|
|
3355 DEFUN ("char-ucs", Fchar_ucs, 1, 1, 0, /*
|
|
|
3356 Return the UCS code (a positive integer) corresponding to CHARACTER.
|
|
|
3357 */
|
|
|
3358 (character))
|
|
|
3359 {
|
|
|
3360 return Fget_char_table (character, mule_to_ucs_table);
|
|
|
3361 }
|
|
|
3362
|
|
|
3363 /* Decode a UCS-4 character into a buffer. If the lookup fails, use
|
|
|
3364 <GETA MARK> (U+3013) of JIS X 0208, which means correct character
|
|
|
3365 is not found, instead.
|
|
|
3366 #### do something more appropriate (use blob?)
|
|
|
3367 Danger, Will Robinson! Data loss. Should we signal user? */
|
|
|
3368 static void
|
|
|
3369 decode_ucs4 (unsigned long ch, unsigned_char_dynarr *dst)
|
|
|
3370 {
|
|
|
3371 Lisp_Object chr = ucs_to_char (ch);
|
|
|
3372
|
|
|
3373 if (! NILP (chr))
|
|
|
3374 {
|
|
|
3375 Bufbyte work[MAX_EMCHAR_LEN];
|
|
|
3376 int len;
|
|
|
3377
|
|
|
3378 ch = XCHAR (chr);
|
|
|
3379 len = (ch < 128) ?
|
|
|
3380 simple_set_charptr_emchar (work, ch) :
|
|
|
3381 non_ascii_set_charptr_emchar (work, ch);
|
|
|
3382 Dynarr_add_many (dst, work, len);
|
|
|
3383 }
|
|
|
3384 else
|
|
|
3385 {
|
|
|
3386 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
3387 Dynarr_add (dst, 34 + 128);
|
|
|
3388 Dynarr_add (dst, 46 + 128);
|
|
|
3389 }
|
|
|
3390 }
|
|
|
3391
|
|
|
3392 static unsigned long
|
|
|
3393 mule_char_to_ucs4 (Lisp_Object charset,
|
|
|
3394 unsigned char h, unsigned char l)
|
|
|
3395 {
|
|
|
3396 Lisp_Object code
|
|
|
3397 = Fget_char_table (make_char (MAKE_CHAR (charset, h & 127, l & 127)),
|
|
|
3398 mule_to_ucs_table);
|
|
|
3399
|
|
|
3400 if (INTP (code))
|
|
|
3401 {
|
|
|
3402 return XINT (code);
|
|
|
3403 }
|
|
|
3404 else if ( (XCHARSET_DIMENSION (charset) == 2) &&
|
|
|
3405 (XCHARSET_CHARS (charset) == 94) )
|
|
|
3406 {
|
|
|
3407 unsigned char final = XCHARSET_FINAL (charset);
|
|
|
3408
|
|
|
3409 if ( ('@' <= final) && (final < 0x7f) )
|
|
|
3410 {
|
|
|
3411 return 0xe00000 + (final - '@') * 94 * 94
|
|
|
3412 + ((h & 127) - 33) * 94 + (l & 127) - 33;
|
|
|
3413 }
|
|
|
3414 else
|
|
|
3415 {
|
|
|
3416 return '?';
|
|
|
3417 }
|
|
|
3418 }
|
|
|
3419 else
|
|
|
3420 {
|
|
|
3421 return '?';
|
|
|
3422 }
|
|
|
3423 }
|
|
|
3424
|
|
|
3425 static void
|
|
|
3426 encode_ucs4 (Lisp_Object charset,
|
|
|
3427 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3428 {
|
|
|
3429 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3430 Dynarr_add (dst, code >> 24);
|
|
|
3431 Dynarr_add (dst, (code >> 16) & 255);
|
|
|
3432 Dynarr_add (dst, (code >> 8) & 255);
|
|
|
3433 Dynarr_add (dst, code & 255);
|
|
|
3434 }
|
|
|
3435
|
|
|
3436 static int
|
|
|
3437 detect_coding_ucs4 (struct detection_state *st, CONST unsigned char *src,
|
|
|
3438 unsigned int n)
|
|
|
3439 {
|
|
|
3440 while (n--)
|
|
|
3441 {
|
|
|
3442 int c = *src++;
|
|
|
3443 switch (st->ucs4.in_byte)
|
|
|
3444 {
|
|
|
3445 case 0:
|
|
|
3446 if (c >= 128)
|
|
|
3447 return 0;
|
|
|
3448 else
|
|
|
3449 st->ucs4.in_byte++;
|
|
|
3450 break;
|
|
|
3451 case 3:
|
|
|
3452 st->ucs4.in_byte = 0;
|
|
|
3453 break;
|
|
|
3454 default:
|
|
|
3455 st->ucs4.in_byte++;
|
|
|
3456 }
|
|
|
3457 }
|
|
|
3458 return CODING_CATEGORY_UCS4_MASK;
|
|
|
3459 }
|
|
|
3460
|
|
|
3461 static void
|
|
|
3462 decode_coding_ucs4 (Lstream *decoding, CONST unsigned char *src,
|
|
|
3463 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3464 {
|
|
|
3465 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3466 unsigned int flags = str->flags;
|
|
|
3467 unsigned int ch = str->ch;
|
|
|
3468 unsigned char counter = str->counter;
|
|
|
3469
|
|
|
3470 while (n--)
|
|
|
3471 {
|
|
|
3472 unsigned char c = *src++;
|
|
|
3473 switch (counter)
|
|
|
3474 {
|
|
|
3475 case 0:
|
|
|
3476 ch = c;
|
|
|
3477 counter = 3;
|
|
|
3478 break;
|
|
|
3479 case 1:
|
|
|
3480 decode_ucs4 ( ( ch << 8 ) | c, dst);
|
|
|
3481 ch = 0;
|
|
|
3482 counter = 0;
|
|
|
3483 break;
|
|
|
3484 default:
|
|
|
3485 ch = ( ch << 8 ) | c;
|
|
|
3486 counter--;
|
|
|
3487 }
|
|
|
3488 }
|
|
|
3489 if (counter & CODING_STATE_END)
|
|
|
3490 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3491
|
|
|
3492 str->flags = flags;
|
|
|
3493 str->ch = ch;
|
|
|
3494 str->counter = counter;
|
|
|
3495 }
|
|
|
3496
|
|
|
3497 static void
|
|
|
3498 encode_coding_ucs4 (Lstream *encoding, CONST unsigned char *src,
|
|
|
3499 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3500 {
|
|
|
3501 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3502 unsigned int flags = str->flags;
|
|
|
3503 unsigned int ch = str->ch;
|
|
|
3504 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3505 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3506
|
|
|
3507 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3508 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3509 on the source while we're outputting the composite char. */
|
|
|
3510 unsigned int saved_n = 0;
|
|
|
3511 CONST unsigned char *saved_src = NULL;
|
|
|
3512 int in_composite = 0;
|
|
|
3513
|
|
|
3514 back_to_square_n:
|
|
|
3515 #endif
|
|
|
3516
|
|
|
3517 while (n--)
|
|
|
3518 {
|
|
|
3519 unsigned char c = *src++;
|
|
|
3520
|
|
|
3521 if (BYTE_ASCII_P (c))
|
|
|
3522 { /* Processing ASCII character */
|
|
|
3523 ch = 0;
|
|
|
3524 encode_ucs4 (Vcharset_ascii, c, 0, dst);
|
|
|
3525 char_boundary = 1;
|
|
|
3526 }
|
|
|
3527 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3528 { /* Processing Leading Byte */
|
|
|
3529 ch = 0;
|
|
|
3530 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3531 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3532 ch = c;
|
|
|
3533 char_boundary = 0;
|
|
|
3534 }
|
|
|
3535 else
|
|
|
3536 { /* Processing Non-ASCII character */
|
|
|
3537 char_boundary = 1;
|
|
|
3538 if (EQ (charset, Vcharset_control_1))
|
|
|
3539 {
|
|
|
3540 encode_ucs4 (Vcharset_control_1, c, 0, dst);
|
|
|
3541 }
|
|
|
3542 else
|
|
|
3543 {
|
|
|
3544 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3545 {
|
|
|
3546 case 2:
|
|
|
3547 encode_ucs4 (charset, c, 0, dst);
|
|
|
3548 break;
|
|
|
3549 case 3:
|
|
|
3550 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3551 {
|
|
|
3552 encode_ucs4 (charset, c, 0, dst);
|
|
|
3553 ch = 0;
|
|
|
3554 }
|
|
|
3555 else if (ch)
|
|
|
3556 {
|
|
|
3557 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3558 if (EQ (charset, Vcharset_composite))
|
|
|
3559 {
|
|
|
3560 if (in_composite)
|
|
|
3561 {
|
|
|
3562 /* #### Bother! We don't know how to
|
|
|
3563 handle this yet. */
|
|
|
3564 Dynarr_add (dst, 0);
|
|
|
3565 Dynarr_add (dst, 0);
|
|
|
3566 Dynarr_add (dst, 0);
|
|
|
3567 Dynarr_add (dst, '~');
|
|
|
3568 }
|
|
|
3569 else
|
|
|
3570 {
|
|
|
3571 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
3572 ch & 0x7F, c & 0x7F);
|
|
|
3573 Lisp_Object lstr = composite_char_string (emch);
|
|
|
3574 saved_n = n;
|
|
|
3575 saved_src = src;
|
|
|
3576 in_composite = 1;
|
|
|
3577 src = XSTRING_DATA (lstr);
|
|
|
3578 n = XSTRING_LENGTH (lstr);
|
|
|
3579 }
|
|
|
3580 }
|
|
|
3581 else
|
|
|
3582 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3583 {
|
|
|
3584 encode_ucs4(charset, ch, c, dst);
|
|
|
3585 }
|
|
|
3586 ch = 0;
|
|
|
3587 }
|
|
|
3588 else
|
|
|
3589 {
|
|
|
3590 ch = c;
|
|
|
3591 char_boundary = 0;
|
|
|
3592 }
|
|
|
3593 break;
|
|
|
3594 case 4:
|
|
|
3595 if (ch)
|
|
|
3596 {
|
|
|
3597 encode_ucs4 (charset, ch, c, dst);
|
|
|
3598 ch = 0;
|
|
|
3599 }
|
|
|
3600 else
|
|
|
3601 {
|
|
|
3602 ch = c;
|
|
|
3603 char_boundary = 0;
|
|
|
3604 }
|
|
|
3605 break;
|
|
|
3606 default:
|
|
|
3607 abort ();
|
|
|
3608 }
|
|
|
3609 }
|
|
|
3610 }
|
|
|
3611 }
|
|
|
3612
|
|
|
3613 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3614 if (in_composite)
|
|
|
3615 {
|
|
|
3616 n = saved_n;
|
|
|
3617 src = saved_src;
|
|
|
3618 in_composite = 0;
|
|
|
3619 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
3620 }
|
|
|
3621 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3622
|
|
|
3623 str->flags = flags;
|
|
|
3624 str->ch = ch;
|
|
|
3625 str->iso2022.current_char_boundary = char_boundary;
|
|
|
3626 str->iso2022.current_charset = charset;
|
|
|
3627
|
|
|
3628 /* Verbum caro factum est! */
|
|
|
3629 }
|
|
|
3630
|
|
|
3631
|
|
|
3632 /************************************************************************/
|
|
|
3633 /* UTF-8 methods */
|
|
|
3634 /************************************************************************/
|
|
|
3635
|
|
|
3636 static int
|
|
|
3637 detect_coding_utf8 (struct detection_state *st, CONST unsigned char *src,
|
|
|
3638 unsigned int n)
|
|
|
3639 {
|
|
|
3640 while (n--)
|
|
|
3641 {
|
|
|
3642 unsigned char c = *src++;
|
|
|
3643 switch (st->utf8.in_byte)
|
|
|
3644 {
|
|
|
3645 case 0:
|
|
|
3646 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
3647 return 0;
|
|
|
3648 else if (c >= 0xfc)
|
|
|
3649 st->utf8.in_byte = 5;
|
|
|
3650 else if (c >= 0xf8)
|
|
|
3651 st->utf8.in_byte = 4;
|
|
|
3652 else if (c >= 0xf0)
|
|
|
3653 st->utf8.in_byte = 3;
|
|
|
3654 else if (c >= 0xe0)
|
|
|
3655 st->utf8.in_byte = 2;
|
|
|
3656 else if (c >= 0xc0)
|
|
|
3657 st->utf8.in_byte = 1;
|
|
|
3658 else if (c >= 0x80)
|
|
|
3659 return 0;
|
|
|
3660 break;
|
|
|
3661 default:
|
|
|
3662 if ((c & 0xc0) != 0x80)
|
|
|
3663 return 0;
|
|
|
3664 else
|
|
|
3665 st->utf8.in_byte--;
|
|
|
3666 }
|
|
|
3667 }
|
|
|
3668 return CODING_CATEGORY_UTF8_MASK;
|
|
|
3669 }
|
|
|
3670
|
|
|
3671 static void
|
|
|
3672 decode_coding_utf8 (Lstream *decoding, CONST unsigned char *src,
|
|
|
3673 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3674 {
|
|
|
3675 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3676 unsigned int flags = str->flags;
|
|
|
3677 unsigned int ch = str->ch;
|
|
|
3678 eol_type_t eol_type = str->eol_type;
|
|
|
3679 unsigned char counter = str->counter;
|
|
|
3680
|
|
|
3681 while (n--)
|
|
|
3682 {
|
|
|
3683 unsigned char c = *src++;
|
|
|
3684 switch (counter)
|
|
|
3685 {
|
|
|
3686 case 0:
|
|
|
3687 if ( c >= 0xfc )
|
|
|
3688 {
|
|
|
3689 ch = c & 0x01;
|
|
|
3690 counter = 5;
|
|
|
3691 }
|
|
|
3692 else if ( c >= 0xf8 )
|
|
|
3693 {
|
|
|
3694 ch = c & 0x03;
|
|
|
3695 counter = 4;
|
|
|
3696 }
|
|
|
3697 else if ( c >= 0xf0 )
|
|
|
3698 {
|
|
|
3699 ch = c & 0x07;
|
|
|
3700 counter = 3;
|
|
|
3701 }
|
|
|
3702 else if ( c >= 0xe0 )
|
|
|
3703 {
|
|
|
3704 ch = c & 0x0f;
|
|
|
3705 counter = 2;
|
|
|
3706 }
|
|
|
3707 else if ( c >= 0xc0 )
|
|
|
3708 {
|
|
|
3709 ch = c & 0x1f;
|
|
|
3710 counter = 1;
|
|
|
3711 }
|
|
|
3712 else
|
|
|
3713 {
|
|
|
3714 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3715 decode_ucs4 (c, dst);
|
|
|
3716 }
|
|
|
3717 break;
|
|
|
3718 case 1:
|
|
|
3719 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
|
3720 decode_ucs4 (ch, dst);
|
|
|
3721 ch = 0;
|
|
|
3722 counter = 0;
|
|
|
3723 break;
|
|
|
3724 default:
|
|
|
3725 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
|
3726 counter--;
|
|
|
3727 }
|
|
|
3728 label_continue_loop:;
|
|
|
3729 }
|
|
|
3730
|
|
|
3731 if (flags & CODING_STATE_END)
|
|
|
3732 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3733
|
|
|
3734 str->flags = flags;
|
|
|
3735 str->ch = ch;
|
|
|
3736 str->counter = counter;
|
|
|
3737 }
|
|
|
3738
|
|
|
3739 static void
|
|
|
3740 encode_utf8 (Lisp_Object charset,
|
|
|
3741 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3742 {
|
|
|
3743 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3744 if ( code <= 0x7f )
|
|
|
3745 {
|
|
|
3746 Dynarr_add (dst, code);
|
|
|
3747 }
|
|
|
3748 else if ( code <= 0x7ff )
|
|
|
3749 {
|
|
|
3750 Dynarr_add (dst, (code >> 6) | 0xc0);
|
|
|
3751 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3752 }
|
|
|
3753 else if ( code <= 0xffff )
|
|
|
3754 {
|
|
|
3755 Dynarr_add (dst, (code >> 12) | 0xe0);
|
|
|
3756 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3757 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3758 }
|
|
|
3759 else if ( code <= 0x1fffff )
|
|
|
3760 {
|
|
|
3761 Dynarr_add (dst, (code >> 18) | 0xf0);
|
|
|
3762 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3763 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3764 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3765 }
|
|
|
3766 else if ( code <= 0x3ffffff )
|
|
|
3767 {
|
|
|
3768 Dynarr_add (dst, (code >> 24) | 0xf8);
|
|
|
3769 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3770 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3771 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3772 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3773 }
|
|
|
3774 else
|
|
|
3775 {
|
|
|
3776 Dynarr_add (dst, (code >> 30) | 0xfc);
|
|
|
3777 Dynarr_add (dst, ((code >> 24) & 0x3f) | 0x80);
|
|
|
3778 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3779 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3780 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3781 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3782 }
|
|
|
3783 }
|
|
|
3784
|
|
|
3785 static void
|
|
|
3786 encode_coding_utf8 (Lstream *encoding, CONST unsigned char *src,
|
|
|
3787 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3788 {
|
|
|
3789 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3790 unsigned int flags = str->flags;
|
|
|
3791 unsigned int ch = str->ch;
|
|
|
3792 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3793 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3794 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3795
|
|
|
3796 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3797 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3798 on the source while we're outputting the composite char. */
|
|
|
3799 unsigned int saved_n = 0;
|
|
|
3800 CONST unsigned char *saved_src = NULL;
|
|
|
3801 int in_composite = 0;
|
|
|
3802
|
|
|
3803 back_to_square_n:
|
|
|
3804 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3805
|
|
|
3806 while (n--)
|
|
|
3807 {
|
|
|
3808 unsigned char c = *src++;
|
|
|
3809
|
|
|
3810 if (BYTE_ASCII_P (c))
|
|
|
3811 { /* Processing ASCII character */
|
|
|
3812 ch = 0;
|
|
|
3813 if (c == '\n')
|
|
|
3814 {
|
|
|
3815 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3816 Dynarr_add (dst, '\r');
|
|
|
3817 if (eol_type != EOL_CR)
|
|
|
3818 Dynarr_add (dst, c);
|
|
|
3819 }
|
|
|
3820 else
|
|
|
3821 encode_utf8 (Vcharset_ascii, c, 0, dst);
|
|
|
3822 char_boundary = 1;
|
|
|
3823 }
|
|
|
3824 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3825 { /* Processing Leading Byte */
|
|
|
3826 ch = 0;
|
|
|
3827 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3828 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3829 ch = c;
|
|
|
3830 char_boundary = 0;
|
|
|
3831 }
|
|
|
3832 else
|
|
|
3833 { /* Processing Non-ASCII character */
|
|
|
3834 char_boundary = 1;
|
|
|
3835 if (EQ (charset, Vcharset_control_1))
|
|
|
3836 {
|
|
|
3837 encode_utf8 (Vcharset_control_1, c, 0, dst);
|
|
|
3838 }
|
|
|
3839 else
|
|
|
3840 {
|
|
|
3841 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3842 {
|
|
|
3843 case 2:
|
|
|
3844 encode_utf8 (charset, c, 0, dst);
|
|
|
3845 break;
|
|
|
3846 case 3:
|
|
|
3847 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3848 {
|
|
|
3849 encode_utf8 (charset, c, 0, dst);
|
|
|
3850 ch = 0;
|
|
|
3851 }
|
|
|
3852 else if (ch)
|
|
|
3853 {
|
|
|
3854 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3855 if (EQ (charset, Vcharset_composite))
|
|
|
3856 {
|
|
|
3857 if (in_composite)
|
|
|
3858 {
|
|
|
3859 /* #### Bother! We don't know how to
|
|
|
3860 handle this yet. */
|
|
|
3861 encode_utf8 (Vcharset_ascii, '~', 0, dst);
|
|
|
3862 }
|
|
|
3863 else
|
|
|
3864 {
|
|
|
3865 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
3866 ch & 0x7F, c & 0x7F);
|
|
|
3867 Lisp_Object lstr = composite_char_string (emch);
|
|
|
3868 saved_n = n;
|
|
|
3869 saved_src = src;
|
|
|
3870 in_composite = 1;
|
|
|
3871 src = XSTRING_DATA (lstr);
|
|
|
3872 n = XSTRING_LENGTH (lstr);
|
|
|
3873 }
|
|
|
3874 }
|
|
|
3875 else
|
|
|
3876 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3877 {
|
|
|
3878 encode_utf8 (charset, ch, c, dst);
|
|
|
3879 }
|
|
|
3880 ch = 0;
|
|
|
3881 }
|
|
|
3882 else
|
|
|
3883 {
|
|
|
3884 ch = c;
|
|
|
3885 char_boundary = 0;
|
|
|
3886 }
|
|
|
3887 break;
|
|
|
3888 case 4:
|
|
|
3889 if (ch)
|
|
|
3890 {
|
|
|
3891 encode_utf8 (charset, ch, c, dst);
|
|
|
3892 ch = 0;
|
|
|
3893 }
|
|
|
3894 else
|
|
|
3895 {
|
|
|
3896 ch = c;
|
|
|
3897 char_boundary = 0;
|
|
|
3898 }
|
|
|
3899 break;
|
|
|
3900 default:
|
|
|
3901 abort ();
|
|
|
3902 }
|
|
|
3903 }
|
|
|
3904 }
|
|
|
3905 }
|
|
|
3906
|
|
|
3907 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3908 if (in_composite)
|
|
|
3909 {
|
|
|
3910 n = saved_n;
|
|
|
3911 src = saved_src;
|
|
|
3912 in_composite = 0;
|
|
|
3913 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
3914 }
|
|
|
3915 #endif
|
|
|
3916
|
|
|
3917 str->flags = flags;
|
|
|
3918 str->ch = ch;
|
|
|
3919 str->iso2022.current_char_boundary = char_boundary;
|
|
|
3920 str->iso2022.current_charset = charset;
|
|
|
3921
|
|
|
3922 /* Verbum caro factum est! */
|
|
|
3923 }
|
|
|
3924
|
|
|
3925
|
|
|
3926 /************************************************************************/
|
|
|
3927 /* ISO2022 methods */
|
|
|
3928 /************************************************************************/
|
|
|
3929
|
|
|
3930 /* The following note describes the coding system ISO2022 briefly.
|
|
|
3931 Since the intention of this note is to help understand the
|
|
|
3932 functions in this file, some parts are NOT ACCURATE or OVERLY
|
|
|
3933 SIMPLIFIED. For thorough understanding, please refer to the
|
|
|
3934 original document of ISO2022.
|
|
|
3935
|
|
|
3936 ISO2022 provides many mechanisms to encode several character sets
|
|
|
3937 in 7-bit and 8-bit environments. For 7-bit environments, all text
|
|
|
3938 is encoded using bytes less than 128. This may make the encoded
|
|
|
3939 text a little bit longer, but the text passes more easily through
|
|
|
3940 several gateways, some of which strip off MSB (Most Signigant Bit).
|
|
|
3941
|
|
|
3942 There are two kinds of character sets: control character set and
|
|
|
3943 graphic character set. The former contains control characters such
|
|
|
3944 as `newline' and `escape' to provide control functions (control
|
|
|
3945 functions are also provided by escape sequences). The latter
|
|
|
3946 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
|
3947 two control character sets and many graphic character sets.
|
|
|
3948
|
|
|
3949 Graphic character sets are classified into one of the following
|
|
|
3950 four classes, according to the number of bytes (DIMENSION) and
|
|
|
3951 number of characters in one dimension (CHARS) of the set:
|
|
|
3952 - DIMENSION1_CHARS94
|
|
|
3953 - DIMENSION1_CHARS96
|
|
|
3954 - DIMENSION2_CHARS94
|
|
|
3955 - DIMENSION2_CHARS96
|
|
|
3956
|
|
|
3957 In addition, each character set is assigned an identification tag,
|
|
|
3958 unique for each set, called "final character" (denoted as <F>
|
|
|
3959 hereafter). The <F> of each character set is decided by ECMA(*)
|
|
|
3960 when it is registered in ISO. The code range of <F> is 0x30..0x7F
|
|
|
3961 (0x30..0x3F are for private use only).
|
|
|
3962
|
|
|
3963 Note (*): ECMA = European Computer Manufacturers Association
|
|
|
3964
|
|
|
3965 Here are examples of graphic character set [NAME(<F>)]:
|
|
|
3966 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
|
3967 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
|
|
|
3968 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
|
|
|
3969 o DIMENSION2_CHARS96 -- none for the moment
|
|
|
3970
|
|
|
3971 A code area (1 byte = 8 bits) is divided into 4 areas, C0, GL, C1, and GR.
|
|
|
3972 C0 [0x00..0x1F] -- control character plane 0
|
|
|
3973 GL [0x20..0x7F] -- graphic character plane 0
|
|
|
3974 C1 [0x80..0x9F] -- control character plane 1
|
|
|
3975 GR [0xA0..0xFF] -- graphic character plane 1
|
|
|
3976
|
|
|
3977 A control character set is directly designated and invoked to C0 or
|
|
|
3978 C1 by an escape sequence. The most common case is that:
|
|
|
3979 - ISO646's control character set is designated/invoked to C0, and
|
|
|
3980 - ISO6429's control character set is designated/invoked to C1,
|
|
|
3981 and usually these designations/invocations are omitted in encoded
|
|
|
3982 text. In a 7-bit environment, only C0 can be used, and a control
|
|
|
3983 character for C1 is encoded by an appropriate escape sequence to
|
|
|
3984 fit into the environment. All control characters for C1 are
|
|
|
3985 defined to have corresponding escape sequences.
|
|
|
3986
|
|
|
3987 A graphic character set is at first designated to one of four
|
|
|
3988 graphic registers (G0 through G3), then these graphic registers are
|
|
|
3989 invoked to GL or GR. These designations and invocations can be
|
|
|
3990 done independently. The most common case is that G0 is invoked to
|
|
|
3991 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
|
3992 these invocations and designations are omitted in encoded text.
|
|
|
3993 In a 7-bit environment, only GL can be used.
|
|
|
3994
|
|
|
3995 When a graphic character set of CHARS94 is invoked to GL, codes
|
|
|
3996 0x20 and 0x7F of the GL area work as control characters SPACE and
|
|
|
3997 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
|
|
|
3998 be used.
|
|
|
3999
|
|
|
4000 There are two ways of invocation: locking-shift and single-shift.
|
|
|
4001 With locking-shift, the invocation lasts until the next different
|
|
|
4002 invocation, whereas with single-shift, the invocation affects the
|
|
|
4003 following character only and doesn't affect the locking-shift
|
|
|
4004 state. Invocations are done by the following control characters or
|
|
|
4005 escape sequences:
|
|
|
4006
|
|
|
4007 ----------------------------------------------------------------------
|
|
|
4008 abbrev function cntrl escape seq description
|
|
|
4009 ----------------------------------------------------------------------
|
|
|
4010 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
|
4011 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
|
4012 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
|
4013 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
|
|
4014 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
|
|
|
4015 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
|
|
|
4016 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
|
|
|
4017 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
|
4018 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
|
4019 ----------------------------------------------------------------------
|
|
|
4020 (*) These are not used by any known coding system.
|
|
|
4021
|
|
|
4022 Control characters for these functions are defined by macros
|
|
|
4023 ISO_CODE_XXX in `coding.h'.
|
|
|
4024
|
|
|
4025 Designations are done by the following escape sequences:
|
|
|
4026 ----------------------------------------------------------------------
|
|
|
4027 escape sequence description
|
|
|
4028 ----------------------------------------------------------------------
|
|
|
4029 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
|
|
|
4030 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
|
|
|
4031 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
|
|
|
4032 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
|
|
|
4033 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
|
|
|
4034 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
|
|
|
4035 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
|
|
|
4036 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
|
|
|
4037 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
|
|
|
4038 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
|
|
|
4039 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
|
|
|
4040 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
|
|
|
4041 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
|
|
|
4042 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
|
|
|
4043 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
|
|
|
4044 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
|
|
|
4045 ----------------------------------------------------------------------
|
|
|
4046
|
|
|
4047 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
|
|
|
4048 of dimension 1, chars 94, and final character <F>, etc...
|
|
|
4049
|
|
|
4050 Note (*): Although these designations are not allowed in ISO2022,
|
|
|
4051 Emacs accepts them on decoding, and produces them on encoding
|
|
|
4052 CHARS96 character sets in a coding system which is characterized as
|
|
|
4053 7-bit environment, non-locking-shift, and non-single-shift.
|
|
|
4054
|
|
|
4055 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
|
|
4056 '(' can be omitted. We refer to this as "short-form" hereafter.
|
|
|
4057
|
|
|
4058 Now you may notice that there are a lot of ways for encoding the
|
|
|
4059 same multilingual text in ISO2022. Actually, there exist many
|
|
|
4060 coding systems such as Compound Text (used in X11's inter client
|
|
|
4061 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
|
4062 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
|
4063 localized platforms), and all of these are variants of ISO2022.
|
|
|
4064
|
|
|
4065 In addition to the above, Emacs handles two more kinds of escape
|
|
|
4066 sequences: ISO6429's direction specification and Emacs' private
|
|
|
4067 sequence for specifying character composition.
|
|
|
4068
|
|
|
4069 ISO6429's direction specification takes the following form:
|
|
|
4070 o CSI ']' -- end of the current direction
|
|
|
4071 o CSI '0' ']' -- end of the current direction
|
|
|
4072 o CSI '1' ']' -- start of left-to-right text
|
|
|
4073 o CSI '2' ']' -- start of right-to-left text
|
|
|
4074 The control character CSI (0x9B: control sequence introducer) is
|
|
|
4075 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
|
|
|
4076
|
|
|
4077 Character composition specification takes the following form:
|
|
|
4078 o ESC '0' -- start character composition
|
|
|
4079 o ESC '1' -- end character composition
|
|
|
4080 Since these are not standard escape sequences of any ISO standard,
|
|
|
4081 their use with these meanings is restricted to Emacs only. */
|
|
|
4082
|
|
|
4083 static void
|
|
|
4084 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
|
4085 {
|
|
|
4086 int i;
|
|
|
4087
|
|
|
4088 for (i = 0; i < 4; i++)
|
|
|
4089 {
|
|
|
4090 if (!NILP (coding_system))
|
|
|
4091 iso->charset[i] =
|
|
|
4092 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
|
4093 else
|
|
|
4094 iso->charset[i] = Qt;
|
|
|
4095 iso->invalid_designated[i] = 0;
|
|
|
4096 }
|
|
|
4097 iso->esc = ISO_ESC_NOTHING;
|
|
|
4098 iso->esc_bytes_index = 0;
|
|
|
4099 iso->register_left = 0;
|
|
|
4100 iso->register_right = 1;
|
|
|
4101 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4102 iso->invalid_switch_dir = 0;
|
|
|
4103 iso->output_direction_sequence = 0;
|
|
|
4104 iso->output_literally = 0;
|
|
|
4105 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4106 if (iso->composite_chars)
|
|
|
4107 Dynarr_reset (iso->composite_chars);
|
|
|
4108 #endif
|
|
|
4109 }
|
|
|
4110
|
|
|
4111 static int
|
|
|
4112 fit_to_be_escape_quoted (unsigned char c)
|
|
|
4113 {
|
|
|
4114 switch (c)
|
|
|
4115 {
|
|
|
4116 case ISO_CODE_ESC:
|
|
|
4117 case ISO_CODE_CSI:
|
|
|
4118 case ISO_CODE_SS2:
|
|
|
4119 case ISO_CODE_SS3:
|
|
|
4120 case ISO_CODE_SO:
|
|
|
4121 case ISO_CODE_SI:
|
|
|
4122 return 1;
|
|
|
4123
|
|
|
4124 default:
|
|
|
4125 return 0;
|
|
|
4126 }
|
|
|
4127 }
|
|
|
4128
|
|
|
4129 /* Parse one byte of an ISO2022 escape sequence.
|
|
|
4130 If the result is an invalid escape sequence, return 0 and
|
|
|
4131 do not change anything in STR. Otherwise, if the result is
|
|
|
4132 an incomplete escape sequence, update ISO2022.ESC and
|
|
|
4133 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
|
4134 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
|
4135 return 1.
|
|
|
4136
|
|
|
4137 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
|
4138 or invocation of an invalid character set and treat that as
|
|
|
4139 an unrecognized escape sequence. */
|
|
|
4140
|
|
|
4141 static int
|
|
|
4142 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
|
4143 unsigned char c, unsigned int *flags,
|
|
|
4144 int check_invalid_charsets)
|
|
|
4145 {
|
|
|
4146 /* (1) If we're at the end of a designation sequence, CS is the
|
|
|
4147 charset being designated and REG is the register to designate
|
|
|
4148 it to.
|
|
|
4149
|
|
|
4150 (2) If we're at the end of a locking-shift sequence, REG is
|
|
|
4151 the register to invoke and HALF (0 == left, 1 == right) is
|
|
|
4152 the half to invoke it into.
|
|
|
4153
|
|
|
4154 (3) If we're at the end of a single-shift sequence, REG is
|
|
|
4155 the register to invoke. */
|
|
|
4156 Lisp_Object cs = Qnil;
|
|
|
4157 int reg, half;
|
|
|
4158
|
|
|
4159 /* NOTE: This code does goto's all over the fucking place.
|
|
|
4160 The reason for this is that we're basically implementing
|
|
|
4161 a state machine here, and hierarchical languages like C
|
|
|
4162 don't really provide a clean way of doing this. */
|
|
|
4163
|
|
|
4164 if (! (*flags & CODING_STATE_ESCAPE))
|
|
|
4165 /* At beginning of escape sequence; we need to reset our
|
|
|
4166 escape-state variables. */
|
|
|
4167 iso->esc = ISO_ESC_NOTHING;
|
|
|
4168
|
|
|
4169 iso->output_literally = 0;
|
|
|
4170 iso->output_direction_sequence = 0;
|
|
|
4171
|
|
|
4172 switch (iso->esc)
|
|
|
4173 {
|
|
|
4174 case ISO_ESC_NOTHING:
|
|
|
4175 iso->esc_bytes_index = 0;
|
|
|
4176 switch (c)
|
|
|
4177 {
|
|
|
4178 case ISO_CODE_ESC: /* Start escape sequence */
|
|
|
4179 *flags |= CODING_STATE_ESCAPE;
|
|
|
4180 iso->esc = ISO_ESC;
|
|
|
4181 goto not_done;
|
|
|
4182
|
|
|
4183 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
|
4184 *flags |= CODING_STATE_ESCAPE;
|
|
|
4185 iso->esc = ISO_ESC_5_11;
|
|
|
4186 goto not_done;
|
|
|
4187
|
|
|
4188 case ISO_CODE_SO: /* locking shift 1 */
|
|
|
4189 reg = 1; half = 0;
|
|
|
4190 goto locking_shift;
|
|
|
4191 case ISO_CODE_SI: /* locking shift 0 */
|
|
|
4192 reg = 0; half = 0;
|
|
|
4193 goto locking_shift;
|
|
|
4194
|
|
|
4195 case ISO_CODE_SS2: /* single shift */
|
|
|
4196 reg = 2;
|
|
|
4197 goto single_shift;
|
|
|
4198 case ISO_CODE_SS3: /* single shift */
|
|
|
4199 reg = 3;
|
|
|
4200 goto single_shift;
|
|
|
4201
|
|
|
4202 default: /* Other control characters */
|
|
|
4203 return 0;
|
|
|
4204 }
|
|
|
4205
|
|
|
4206 case ISO_ESC:
|
|
|
4207 switch (c)
|
|
|
4208 {
|
|
|
4209 /**** single shift ****/
|
|
|
4210
|
|
|
4211 case 'N': /* single shift 2 */
|
|
|
4212 reg = 2;
|
|
|
4213 goto single_shift;
|
|
|
4214 case 'O': /* single shift 3 */
|
|
|
4215 reg = 3;
|
|
|
4216 goto single_shift;
|
|
|
4217
|
|
|
4218 /**** locking shift ****/
|
|
|
4219
|
|
|
4220 case '~': /* locking shift 1 right */
|
|
|
4221 reg = 1; half = 1;
|
|
|
4222 goto locking_shift;
|
|
|
4223 case 'n': /* locking shift 2 */
|
|
|
4224 reg = 2; half = 0;
|
|
|
4225 goto locking_shift;
|
|
|
4226 case '}': /* locking shift 2 right */
|
|
|
4227 reg = 2; half = 1;
|
|
|
4228 goto locking_shift;
|
|
|
4229 case 'o': /* locking shift 3 */
|
|
|
4230 reg = 3; half = 0;
|
|
|
4231 goto locking_shift;
|
|
|
4232 case '|': /* locking shift 3 right */
|
|
|
4233 reg = 3; half = 1;
|
|
|
4234 goto locking_shift;
|
|
|
4235
|
|
|
4236 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4237 /**** composite ****/
|
|
|
4238
|
|
|
4239 case '0':
|
|
|
4240 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
|
4241 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
|
4242 CODING_STATE_COMPOSITE;
|
|
|
4243 return 1;
|
|
|
4244
|
|
|
4245 case '1':
|
|
|
4246 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
|
4247 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
|
4248 ~CODING_STATE_COMPOSITE;
|
|
|
4249 return 1;
|
|
|
4250 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4251
|
|
|
4252 /**** directionality ****/
|
|
|
4253
|
|
|
4254 case '[':
|
|
|
4255 iso->esc = ISO_ESC_5_11;
|
|
|
4256 goto not_done;
|
|
|
4257
|
|
|
4258 /**** designation ****/
|
|
|
4259
|
|
|
4260 case '$': /* multibyte charset prefix */
|
|
|
4261 iso->esc = ISO_ESC_2_4;
|
|
|
4262 goto not_done;
|
|
|
4263
|
|
|
4264 default:
|
|
|
4265 if (0x28 <= c && c <= 0x2F)
|
|
|
4266 {
|
|
|
4267 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
|
|
|
4268 goto not_done;
|
|
|
4269 }
|
|
|
4270
|
|
|
4271 /* This function is called with CODESYS equal to nil when
|
|
|
4272 doing coding-system detection. */
|
|
|
4273 if (!NILP (codesys)
|
|
|
4274 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4275 && fit_to_be_escape_quoted (c))
|
|
|
4276 {
|
|
|
4277 iso->esc = ISO_ESC_LITERAL;
|
|
|
4278 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4279 return 1;
|
|
|
4280 }
|
|
|
4281
|
|
|
4282 /* bzzzt! */
|
|
|
4283 return 0;
|
|
|
4284 }
|
|
|
4285
|
|
|
4286
|
|
|
4287
|
|
|
4288 /**** directionality ****/
|
|
|
4289
|
|
|
4290 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
|
4291 if (c == ']')
|
|
|
4292 {
|
|
|
4293 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4294 goto directionality;
|
|
|
4295 }
|
|
|
4296 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
|
4297 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
|
4298 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
|
4299 else return 0;
|
|
|
4300 goto not_done;
|
|
|
4301
|
|
|
4302 case ISO_ESC_5_11_0:
|
|
|
4303 if (c == ']')
|
|
|
4304 {
|
|
|
4305 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4306 goto directionality;
|
|
|
4307 }
|
|
|
4308 return 0;
|
|
|
4309
|
|
|
4310 case ISO_ESC_5_11_1:
|
|
|
4311 if (c == ']')
|
|
|
4312 {
|
|
|
4313 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4314 goto directionality;
|
|
|
4315 }
|
|
|
4316 return 0;
|
|
|
4317
|
|
|
4318 case ISO_ESC_5_11_2:
|
|
|
4319 if (c == ']')
|
|
|
4320 {
|
|
|
4321 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
|
4322 goto directionality;
|
|
|
4323 }
|
|
|
4324 return 0;
|
|
|
4325
|
|
|
4326 directionality:
|
|
|
4327 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
|
4328 /* Various junk here to attempt to preserve the direction sequences
|
|
|
4329 literally in the text if they would otherwise be swallowed due
|
|
|
4330 to invalid designations that don't show up as actual charset
|
|
|
4331 changes in the text. */
|
|
|
4332 if (iso->invalid_switch_dir)
|
|
|
4333 {
|
|
|
4334 /* We already inserted a direction switch literally into the
|
|
|
4335 text. We assume (#### this may not be right) that the
|
|
|
4336 next direction switch is the one going the other way,
|
|
|
4337 and we need to output that literally as well. */
|
|
|
4338 iso->output_literally = 1;
|
|
|
4339 iso->invalid_switch_dir = 0;
|
|
|
4340 }
|
|
|
4341 else
|
|
|
4342 {
|
|
|
4343 int jj;
|
|
|
4344
|
|
|
4345 /* If we are in the thrall of an invalid designation,
|
|
|
4346 then stick the directionality sequence literally into the
|
|
|
4347 output stream so it ends up in the original text again. */
|
|
|
4348 for (jj = 0; jj < 4; jj++)
|
|
|
4349 if (iso->invalid_designated[jj])
|
|
|
4350 break;
|
|
|
4351 if (jj < 4)
|
|
|
4352 {
|
|
|
4353 iso->output_literally = 1;
|
|
|
4354 iso->invalid_switch_dir = 1;
|
|
|
4355 }
|
|
|
4356 else
|
|
|
4357 /* Indicate that we haven't yet seen a valid designation,
|
|
|
4358 so that if a switch-dir is directly followed by an
|
|
|
4359 invalid designation, both get inserted literally. */
|
|
|
4360 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
|
4361 }
|
|
|
4362 return 1;
|
|
|
4363
|
|
|
4364
|
|
|
4365 /**** designation ****/
|
|
|
4366
|
|
|
4367 case ISO_ESC_2_4:
|
|
|
4368 if (0x28 <= c && c <= 0x2F)
|
|
|
4369 {
|
|
|
4370 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
|
|
|
4371 goto not_done;
|
|
|
4372 }
|
|
|
4373 if (0x40 <= c && c <= 0x42)
|
|
|
4374 {
|
|
|
4375 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
|
4376 *flags & CODING_STATE_R2L ?
|
|
|
4377 CHARSET_RIGHT_TO_LEFT :
|
|
|
4378 CHARSET_LEFT_TO_RIGHT);
|
|
|
4379 reg = 0;
|
|
|
4380 goto designated;
|
|
|
4381 }
|
|
|
4382 return 0;
|
|
|
4383
|
|
|
4384 default:
|
|
|
4385 {
|
|
|
4386 int type =-1;
|
|
|
4387
|
|
|
4388 if (c < '0' || c > '~')
|
|
|
4389 return 0; /* bad final byte */
|
|
|
4390
|
|
|
4391 if (iso->esc >= ISO_ESC_2_8 &&
|
|
|
4392 iso->esc <= ISO_ESC_2_15)
|
|
|
4393 {
|
|
|
4394 type = ((iso->esc >= ISO_ESC_2_12) ?
|
|
|
4395 CHARSET_TYPE_96 : CHARSET_TYPE_94);
|
|
|
4396 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
|
4397 }
|
|
|
4398 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
|
4399 iso->esc <= ISO_ESC_2_4_15)
|
|
|
4400 {
|
|
|
4401 type = ((iso->esc >= ISO_ESC_2_4_12) ?
|
|
|
4402 CHARSET_TYPE_96X96 : CHARSET_TYPE_94X94);
|
|
|
4403 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
|
4404 }
|
|
|
4405 else
|
|
|
4406 {
|
|
|
4407 /* Can this ever be reached? -slb */
|
|
|
4408 abort();
|
|
|
4409 }
|
|
|
4410
|
|
|
4411 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
|
4412 *flags & CODING_STATE_R2L ?
|
|
|
4413 CHARSET_RIGHT_TO_LEFT :
|
|
|
4414 CHARSET_LEFT_TO_RIGHT);
|
|
|
4415 goto designated;
|
|
|
4416 }
|
|
|
4417 }
|
|
|
4418
|
|
|
4419 not_done:
|
|
|
4420 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
|
4421 return -1;
|
|
|
4422
|
|
|
4423 single_shift:
|
|
|
4424 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
|
4425 /* can't invoke something that ain't there. */
|
|
|
4426 return 0;
|
|
|
4427 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
|
4428 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4429 if (reg == 2)
|
|
|
4430 *flags |= CODING_STATE_SS2;
|
|
|
4431 else
|
|
|
4432 *flags |= CODING_STATE_SS3;
|
|
|
4433 return 1;
|
|
|
4434
|
|
|
4435 locking_shift:
|
|
|
4436 if (check_invalid_charsets &&
|
|
|
4437 !CHARSETP (iso->charset[reg]))
|
|
|
4438 /* can't invoke something that ain't there. */
|
|
|
4439 return 0;
|
|
|
4440 if (half)
|
|
|
4441 iso->register_right = reg;
|
|
|
4442 else
|
|
|
4443 iso->register_left = reg;
|
|
|
4444 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4445 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
|
4446 return 1;
|
|
|
4447
|
|
|
4448 designated:
|
|
|
4449 if (NILP (cs) && check_invalid_charsets)
|
|
|
4450 {
|
|
|
4451 iso->invalid_designated[reg] = 1;
|
|
|
4452 iso->charset[reg] = Vcharset_ascii;
|
|
|
4453 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4454 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4455 iso->output_literally = 1;
|
|
|
4456 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4457 {
|
|
|
4458 /* We encountered a switch-direction followed by an
|
|
|
4459 invalid designation. Ensure that the switch-direction
|
|
|
4460 gets outputted; otherwise it will probably get eaten
|
|
|
4461 when the text is written out again. */
|
|
|
4462 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4463 iso->output_direction_sequence = 1;
|
|
|
4464 /* And make sure that the switch-dir going the other
|
|
|
4465 way gets outputted, as well. */
|
|
|
4466 iso->invalid_switch_dir = 1;
|
|
|
4467 }
|
|
|
4468 return 1;
|
|
|
4469 }
|
|
|
4470 /* This function is called with CODESYS equal to nil when
|
|
|
4471 doing coding-system detection. */
|
|
|
4472 if (!NILP (codesys))
|
|
|
4473 {
|
|
|
4474 charset_conversion_spec_dynarr *dyn =
|
|
|
4475 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
|
4476
|
|
|
4477 if (dyn)
|
|
|
4478 {
|
|
|
4479 int i;
|
|
|
4480
|
|
|
4481 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4482 {
|
|
|
4483 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4484 if (EQ (cs, spec->from_charset))
|
|
|
4485 cs = spec->to_charset;
|
|
|
4486 }
|
|
|
4487 }
|
|
|
4488 }
|
|
|
4489
|
|
|
4490 iso->charset[reg] = cs;
|
|
|
4491 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4492 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4493 if (iso->invalid_designated[reg])
|
|
|
4494 {
|
|
|
4495 iso->invalid_designated[reg] = 0;
|
|
|
4496 iso->output_literally = 1;
|
|
|
4497 }
|
|
|
4498 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4499 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4500 return 1;
|
|
|
4501 }
|
|
|
4502
|
|
|
4503 static int
|
|
|
4504 detect_coding_iso2022 (struct detection_state *st, CONST unsigned char *src,
|
|
|
4505 unsigned int n)
|
|
|
4506 {
|
|
|
4507 int mask;
|
|
|
4508
|
|
|
4509 /* #### There are serious deficiencies in the recognition mechanism
|
|
|
4510 here. This needs to be much smarter if it's going to cut it.
|
|
|
4511 The sequence "\xff\x0f" is currently detected as LOCK_SHIFT while
|
|
|
4512 it should be detected as Latin-1.
|
|
|
4513 All the ISO2022 stuff in this file should be synced up with the
|
|
|
4514 code from FSF Emacs-20.4, in which Mule should be more or less stable.
|
|
|
4515 Perhaps we should wait till R2L works in FSF Emacs? */
|
|
|
4516
|
|
|
4517 if (!st->iso2022.initted)
|
|
|
4518 {
|
|
|
4519 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
|
4520 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
|
4521 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4522 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4523 CODING_CATEGORY_ISO_8_2_MASK |
|
|
|
4524 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
|
4525 st->iso2022.flags = 0;
|
|
|
4526 st->iso2022.high_byte_count = 0;
|
|
|
4527 st->iso2022.saw_single_shift = 0;
|
|
|
4528 st->iso2022.initted = 1;
|
|
|
4529 }
|
|
|
4530
|
|
|
4531 mask = st->iso2022.mask;
|
|
|
4532
|
|
|
4533 while (n--)
|
|
|
4534 {
|
|
|
4535 int c = *src++;
|
|
|
4536 if (c >= 0xA0)
|
|
|
4537 {
|
|
|
4538 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4539 st->iso2022.high_byte_count++;
|
|
|
4540 }
|
|
|
4541 else
|
|
|
4542 {
|
|
|
4543 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
|
4544 {
|
|
|
4545 if (st->iso2022.high_byte_count & 1)
|
|
|
4546 /* odd number of high bytes; assume not iso-8-2 */
|
|
|
4547 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4548 }
|
|
|
4549 st->iso2022.high_byte_count = 0;
|
|
|
4550 st->iso2022.saw_single_shift = 0;
|
|
|
4551 if (c > 0x80)
|
|
|
4552 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4553 }
|
|
|
4554 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
|
4555 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
|
4556 { /* control chars */
|
|
|
4557 switch (c)
|
|
|
4558 {
|
|
|
4559 /* Allow and ignore control characters that you might
|
|
|
4560 reasonably see in a text file */
|
|
|
4561 case '\r':
|
|
|
4562 case '\n':
|
|
|
4563 case '\t':
|
|
|
4564 case 7: /* bell */
|
|
|
4565 case 8: /* backspace */
|
|
|
4566 case 11: /* vertical tab */
|
|
|
4567 case 12: /* form feed */
|
|
|
4568 case 26: /* MS-DOS C-z junk */
|
|
|
4569 case 31: /* '^_' -- for info */
|
|
|
4570 goto label_continue_loop;
|
|
|
4571
|
|
|
4572 default:
|
|
|
4573 break;
|
|
|
4574 }
|
|
|
4575 }
|
|
|
4576
|
|
|
4577 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
|
4578 || BYTE_C1_P (c))
|
|
|
4579 {
|
|
|
4580 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
|
4581 &st->iso2022.flags, 0))
|
|
|
4582 {
|
|
|
4583 switch (st->iso2022.iso.esc)
|
|
|
4584 {
|
|
|
4585 case ISO_ESC_DESIGNATE:
|
|
|
4586 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
|
4587 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4588 break;
|
|
|
4589 case ISO_ESC_LOCKING_SHIFT:
|
|
|
4590 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
|
4591 goto ran_out_of_chars;
|
|
|
4592 case ISO_ESC_SINGLE_SHIFT:
|
|
|
4593 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
|
4594 st->iso2022.saw_single_shift = 1;
|
|
|
4595 break;
|
|
|
4596 default:
|
|
|
4597 break;
|
|
|
4598 }
|
|
|
4599 }
|
|
|
4600 else
|
|
|
4601 {
|
|
|
4602 mask = 0;
|
|
|
4603 goto ran_out_of_chars;
|
|
|
4604 }
|
|
|
4605 }
|
|
|
4606 label_continue_loop:;
|
|
|
4607 }
|
|
|
4608
|
|
|
4609 ran_out_of_chars:
|
|
|
4610
|
|
|
4611 return mask;
|
|
|
4612 }
|
|
|
4613
|
|
|
4614 static int
|
|
|
4615 postprocess_iso2022_mask (int mask)
|
|
|
4616 {
|
|
|
4617 /* #### kind of cheesy */
|
|
|
4618 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
|
4619 entirely seven-bit and turn off the eight-bit ones. */
|
|
|
4620 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
|
4621 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4622 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4623 CODING_CATEGORY_ISO_8_2_MASK);
|
|
|
4624 return mask;
|
|
|
4625 }
|
|
|
4626
|
|
|
4627 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
|
4628 output a switch-dir-to-left-to-right sequence to DST.
|
|
|
4629 Also update FLAGS if it is not a null pointer.
|
|
|
4630 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4631 need to handle the CSI differently. */
|
|
|
4632
|
|
|
4633 static void
|
|
|
4634 restore_left_to_right_direction (Lisp_Coding_System *codesys,
|
|
|
4635 unsigned_char_dynarr *dst,
|
|
|
4636 unsigned int *flags,
|
|
|
4637 int internal_p)
|
|
|
4638 {
|
|
|
4639 if (!flags || (*flags & CODING_STATE_R2L))
|
|
|
4640 {
|
|
|
4641 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4642 {
|
|
|
4643 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4644 Dynarr_add (dst, '[');
|
|
|
4645 }
|
|
|
4646 else if (internal_p)
|
|
|
4647 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4648 else
|
|
|
4649 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4650 Dynarr_add (dst, '0');
|
|
|
4651 Dynarr_add (dst, ']');
|
|
|
4652 if (flags)
|
|
|
4653 *flags &= ~CODING_STATE_R2L;
|
|
|
4654 }
|
|
|
4655 }
|
|
|
4656
|
|
|
4657 /* If FLAGS is a null pointer or specifies a direction different from
|
|
|
4658 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
|
4659 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
|
4660 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
|
4661 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4662 need to handle the CSI differently. */
|
|
|
4663
|
|
|
4664 static void
|
|
|
4665 ensure_correct_direction (int direction, Lisp_Coding_System *codesys,
|
|
|
4666 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
|
4667 int internal_p)
|
|
|
4668 {
|
|
|
4669 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
|
4670 direction == CHARSET_LEFT_TO_RIGHT)
|
|
|
4671 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
|
4672 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
|
4673 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
|
4674 direction == CHARSET_RIGHT_TO_LEFT)
|
|
|
4675 {
|
|
|
4676 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4677 {
|
|
|
4678 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4679 Dynarr_add (dst, '[');
|
|
|
4680 }
|
|
|
4681 else if (internal_p)
|
|
|
4682 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4683 else
|
|
|
4684 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4685 Dynarr_add (dst, '2');
|
|
|
4686 Dynarr_add (dst, ']');
|
|
|
4687 if (flags)
|
|
|
4688 *flags |= CODING_STATE_R2L;
|
|
|
4689 }
|
|
|
4690 }
|
|
|
4691
|
|
|
4692 /* Convert ISO2022-format data to internal format. */
|
|
|
4693
|
|
|
4694 static void
|
|
|
4695 decode_coding_iso2022 (Lstream *decoding, CONST unsigned char *src,
|
|
|
4696 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4697 {
|
|
|
4698 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
4699 unsigned int flags = str->flags;
|
|
|
4700 unsigned int ch = str->ch;
|
|
|
4701 eol_type_t eol_type = str->eol_type;
|
|
|
4702 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4703 unsigned_char_dynarr *real_dst = dst;
|
|
|
4704 #endif
|
|
|
4705 Lisp_Object coding_system;
|
|
|
4706
|
|
|
4707 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
4708
|
|
|
4709 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4710 if (flags & CODING_STATE_COMPOSITE)
|
|
|
4711 dst = str->iso2022.composite_chars;
|
|
|
4712 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4713
|
|
|
4714 while (n--)
|
|
|
4715 {
|
|
|
4716 unsigned char c = *src++;
|
|
|
4717 if (flags & CODING_STATE_ESCAPE)
|
|
|
4718 { /* Within ESC sequence */
|
|
|
4719 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
|
4720 c, &flags, 1);
|
|
|
4721
|
|
|
4722 if (retval)
|
|
|
4723 {
|
|
|
4724 switch (str->iso2022.esc)
|
|
|
4725 {
|
|
|
4726 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4727 case ISO_ESC_START_COMPOSITE:
|
|
|
4728 if (str->iso2022.composite_chars)
|
|
|
4729 Dynarr_reset (str->iso2022.composite_chars);
|
|
|
4730 else
|
|
|
4731 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
|
|
|
4732 dst = str->iso2022.composite_chars;
|
|
|
4733 break;
|
|
|
4734 case ISO_ESC_END_COMPOSITE:
|
|
|
4735 {
|
|
|
4736 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
|
4737 Bytecount len;
|
|
|
4738 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
|
4739 Dynarr_length (dst));
|
|
|
4740 dst = real_dst;
|
|
|
4741 len = set_charptr_emchar (comstr, emch);
|
|
|
4742 Dynarr_add_many (dst, comstr, len);
|
|
|
4743 break;
|
|
|
4744 }
|
|
|
4745 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4746
|
|
|
4747 case ISO_ESC_LITERAL:
|
|
|
4748 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4749 break;
|
|
|
4750
|
|
|
4751 default:
|
|
|
4752 /* Everything else handled already */
|
|
|
4753 break;
|
|
|
4754 }
|
|
|
4755 }
|
|
|
4756
|
|
|
4757 /* Attempted error recovery. */
|
|
|
4758 if (str->iso2022.output_direction_sequence)
|
|
|
4759 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
|
4760 CHARSET_RIGHT_TO_LEFT :
|
|
|
4761 CHARSET_LEFT_TO_RIGHT,
|
|
|
4762 str->codesys, dst, 0, 1);
|
|
|
4763 /* More error recovery. */
|
|
|
4764 if (!retval || str->iso2022.output_literally)
|
|
|
4765 {
|
|
|
4766 /* Output the (possibly invalid) sequence */
|
|
|
4767 int i;
|
|
|
4768 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
|
4769 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
|
4770 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4771 if (!retval)
|
|
|
4772 n++, src--;/* Repeat the loop with the same character. */
|
|
|
4773 else
|
|
|
4774 {
|
|
|
4775 /* No sense in reprocessing the final byte of the
|
|
|
4776 escape sequence; it could mess things up anyway.
|
|
|
4777 Just add it now. */
|
|
|
4778 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4779 }
|
|
|
4780 }
|
|
|
4781 ch = 0;
|
|
|
4782 }
|
|
|
4783 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
|
4784 { /* Control characters */
|
|
|
4785
|
|
|
4786 /***** Error-handling *****/
|
|
|
4787
|
|
|
4788 /* If we were in the middle of a character, dump out the
|
|
|
4789 partial character. */
|
|
|
4790 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4791
|
|
|
4792 /* If we just saw a single-shift character, dump it out.
|
|
|
4793 This may dump out the wrong sort of single-shift character,
|
|
|
4794 but least it will give an indication that something went
|
|
|
4795 wrong. */
|
|
|
4796 if (flags & CODING_STATE_SS2)
|
|
|
4797 {
|
|
|
4798 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
|
4799 flags &= ~CODING_STATE_SS2;
|
|
|
4800 }
|
|
|
4801 if (flags & CODING_STATE_SS3)
|
|
|
4802 {
|
|
|
4803 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
|
4804 flags &= ~CODING_STATE_SS3;
|
|
|
4805 }
|
|
|
4806
|
|
|
4807 /***** Now handle the control characters. *****/
|
|
|
4808
|
|
|
4809 /* Handle CR/LF */
|
|
|
4810 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4811
|
|
|
4812 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4813
|
|
|
4814 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
|
4815 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4816 }
|
|
|
4817 else
|
|
|
4818 { /* Graphic characters */
|
|
|
4819 Lisp_Object charset;
|
|
|
4820 int lb;
|
|
|
4821 int reg;
|
|
|
4822
|
|
|
4823 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4824
|
|
|
4825 /* Now determine the charset. */
|
|
|
4826 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
|
4827 : (flags & CODING_STATE_SS3) ? 3
|
|
|
4828 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
|
4829 : str->iso2022.register_left);
|
|
|
4830 charset = str->iso2022.charset[reg];
|
|
|
4831
|
|
|
4832 /* Error checking: */
|
|
|
4833 if (! CHARSETP (charset)
|
|
|
4834 || str->iso2022.invalid_designated[reg]
|
|
|
4835 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
|
4836 && XCHARSET_CHARS (charset) == 94))
|
|
|
4837 /* Mrmph. We are trying to invoke a register that has no
|
|
|
4838 or an invalid charset in it, or trying to add a character
|
|
|
4839 outside the range of the charset. Insert that char literally
|
|
|
4840 to preserve it for the output. */
|
|
|
4841 {
|
|
|
4842 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4843 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4844 }
|
|
|
4845
|
|
|
4846 else
|
|
|
4847 {
|
|
|
4848 /* Things are probably hunky-dorey. */
|
|
|
4849
|
|
|
4850 /* Fetch reverse charset, maybe. */
|
|
|
4851 if (((flags & CODING_STATE_R2L) &&
|
|
|
4852 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
|
4853 ||
|
|
|
4854 (!(flags & CODING_STATE_R2L) &&
|
|
|
4855 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
|
4856 {
|
|
|
4857 Lisp_Object new_charset =
|
|
|
4858 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
|
4859 if (!NILP (new_charset))
|
|
|
4860 charset = new_charset;
|
|
|
4861 }
|
|
|
4862
|
|
|
4863 lb = XCHARSET_LEADING_BYTE (charset);
|
|
|
4864 switch (XCHARSET_REP_BYTES (charset))
|
|
|
4865 {
|
|
|
4866 case 1: /* ASCII */
|
|
|
4867 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4868 Dynarr_add (dst, c & 0x7F);
|
|
|
4869 break;
|
|
|
4870
|
|
|
4871 case 2: /* one-byte official */
|
|
|
4872 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4873 Dynarr_add (dst, lb);
|
|
|
4874 Dynarr_add (dst, c | 0x80);
|
|
|
4875 break;
|
|
|
4876
|
|
|
4877 case 3: /* one-byte private or two-byte official */
|
|
|
4878 if (XCHARSET_PRIVATE_P (charset))
|
|
|
4879 {
|
|
|
4880 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4881 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
|
4882 Dynarr_add (dst, lb);
|
|
|
4883 Dynarr_add (dst, c | 0x80);
|
|
|
4884 }
|
|
|
4885 else
|
|
|
4886 {
|
|
|
4887 if (ch)
|
|
|
4888 {
|
|
|
4889 Dynarr_add (dst, lb);
|
|
|
4890 Dynarr_add (dst, ch | 0x80);
|
|
|
4891 Dynarr_add (dst, c | 0x80);
|
|
|
4892 ch = 0;
|
|
|
4893 }
|
|
|
4894 else
|
|
|
4895 ch = c;
|
|
|
4896 }
|
|
|
4897 break;
|
|
|
4898
|
|
|
4899 default: /* two-byte private */
|
|
|
4900 if (ch)
|
|
|
4901 {
|
|
|
4902 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
|
4903 Dynarr_add (dst, lb);
|
|
|
4904 Dynarr_add (dst, ch | 0x80);
|
|
|
4905 Dynarr_add (dst, c | 0x80);
|
|
|
4906 ch = 0;
|
|
|
4907 }
|
|
|
4908 else
|
|
|
4909 ch = c;
|
|
|
4910 }
|
|
|
4911 }
|
|
|
4912
|
|
|
4913 if (!ch)
|
|
|
4914 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4915 }
|
|
|
4916
|
|
|
4917 label_continue_loop:;
|
|
|
4918 }
|
|
|
4919
|
|
|
4920 if (flags & CODING_STATE_END)
|
|
|
4921 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4922
|
|
|
4923 str->flags = flags;
|
|
|
4924 str->ch = ch;
|
|
|
4925 }
|
|
|
4926
|
|
|
4927
|
|
|
4928 /***** ISO2022 encoder *****/
|
|
|
4929
|
|
|
4930 /* Designate CHARSET into register REG. */
|
|
|
4931
|
|
|
4932 static void
|
|
|
4933 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
|
4934 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
4935 {
|
|
|
4936 static CONST char inter94[] = "()*+";
|
|
|
4937 static CONST char inter96[] = ",-./";
|
|
|
4938 unsigned int type;
|
|
|
4939 unsigned char final;
|
|
|
4940 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
|
4941
|
|
|
4942 str->iso2022.charset[reg] = charset;
|
|
|
4943 if (!CHARSETP (charset))
|
|
|
4944 /* charset might be an initial nil or t. */
|
|
|
4945 return;
|
|
|
4946 type = XCHARSET_TYPE (charset);
|
|
|
4947 final = XCHARSET_FINAL (charset);
|
|
|
4948 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
|
4949 CHARSETP (old_charset) &&
|
|
|
4950 XCHARSET_TYPE (old_charset) == type &&
|
|
|
4951 XCHARSET_FINAL (old_charset) == final)
|
|
|
4952 return;
|
|
|
4953
|
|
|
4954 str->iso2022.force_charset_on_output[reg] = 0;
|
|
|
4955
|
|
|
4956 {
|
|
|
4957 charset_conversion_spec_dynarr *dyn =
|
|
|
4958 str->codesys->iso2022.output_conv;
|
|
|
4959
|
|
|
4960 if (dyn)
|
|
|
4961 {
|
|
|
4962 int i;
|
|
|
4963
|
|
|
4964 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4965 {
|
|
|
4966 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4967 if (EQ (charset, spec->from_charset))
|
|
|
4968 charset = spec->to_charset;
|
|
|
4969 }
|
|
|
4970 }
|
|
|
4971 }
|
|
|
4972
|
|
|
4973 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4974 switch (type)
|
|
|
4975 {
|
|
|
4976 case CHARSET_TYPE_94:
|
|
|
4977 Dynarr_add (dst, inter94[reg]);
|
|
|
4978 break;
|
|
|
4979 case CHARSET_TYPE_96:
|
|
|
4980 Dynarr_add (dst, inter96[reg]);
|
|
|
4981 break;
|
|
|
4982 case CHARSET_TYPE_94X94:
|
|
|
4983 Dynarr_add (dst, '$');
|
|
|
4984 if (reg != 0
|
|
|
4985 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
|
4986 || final < '@'
|
|
|
4987 || final > 'B')
|
|
|
4988 Dynarr_add (dst, inter94[reg]);
|
|
|
4989 break;
|
|
|
4990 case CHARSET_TYPE_96X96:
|
|
|
4991 Dynarr_add (dst, '$');
|
|
|
4992 Dynarr_add (dst, inter96[reg]);
|
|
|
4993 break;
|
|
|
4994 }
|
|
|
4995 Dynarr_add (dst, final);
|
|
|
4996 }
|
|
|
4997
|
|
|
4998 static void
|
|
|
4999 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5000 {
|
|
|
5001 if (str->iso2022.register_left != 0)
|
|
|
5002 {
|
|
|
5003 Dynarr_add (dst, ISO_CODE_SI);
|
|
|
5004 str->iso2022.register_left = 0;
|
|
|
5005 }
|
|
|
5006 }
|
|
|
5007
|
|
|
5008 static void
|
|
|
5009 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5010 {
|
|
|
5011 if (str->iso2022.register_left != 1)
|
|
|
5012 {
|
|
|
5013 Dynarr_add (dst, ISO_CODE_SO);
|
|
|
5014 str->iso2022.register_left = 1;
|
|
|
5015 }
|
|
|
5016 }
|
|
|
5017
|
|
|
5018 /* Convert internally-formatted data to ISO2022 format. */
|
|
|
5019
|
|
|
5020 static void
|
|
|
5021 encode_coding_iso2022 (Lstream *encoding, CONST unsigned char *src,
|
|
|
5022 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5023 {
|
|
|
5024 unsigned char charmask, c;
|
|
|
5025 unsigned char char_boundary;
|
|
|
5026 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
5027 unsigned int flags = str->flags;
|
|
|
5028 unsigned int ch = str->ch;
|
|
|
5029 Lisp_Coding_System *codesys = str->codesys;
|
|
|
5030 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
5031 int i;
|
|
|
5032 Lisp_Object charset;
|
|
|
5033 int half;
|
|
|
5034
|
|
|
5035 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5036 /* flags for handling composite chars. We do a little switcharoo
|
|
|
5037 on the source while we're outputting the composite char. */
|
|
|
5038 unsigned int saved_n = 0;
|
|
|
5039 CONST unsigned char *saved_src = NULL;
|
|
|
5040 int in_composite = 0;
|
|
|
5041 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5042
|
|
|
5043 char_boundary = str->iso2022.current_char_boundary;
|
|
|
5044 charset = str->iso2022.current_charset;
|
|
|
5045 half = str->iso2022.current_half;
|
|
|
5046
|
|
|
5047 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5048 back_to_square_n:
|
|
|
5049 #endif
|
|
|
5050 while (n--)
|
|
|
5051 {
|
|
|
5052 c = *src++;
|
|
|
5053
|
|
|
5054 if (BYTE_ASCII_P (c))
|
|
|
5055 { /* Processing ASCII character */
|
|
|
5056 ch = 0;
|
|
|
5057
|
|
|
5058 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5059
|
|
|
5060 /* Make sure G0 contains ASCII */
|
|
|
5061 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
|
5062 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
|
5063 {
|
|
|
5064 ensure_normal_shift (str, dst);
|
|
|
5065 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
|
5066 }
|
|
|
5067
|
|
|
5068 /* If necessary, restore everything to the default state
|
|
|
5069 at end-of-line */
|
|
|
5070 if (c == '\n' &&
|
|
|
5071 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
|
5072 {
|
|
|
5073 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5074
|
|
|
5075 ensure_normal_shift (str, dst);
|
|
|
5076
|
|
|
5077 for (i = 0; i < 4; i++)
|
|
|
5078 {
|
|
|
5079 Lisp_Object initial_charset =
|
|
|
5080 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
5081 iso2022_designate (initial_charset, i, str, dst);
|
|
|
5082 }
|
|
|
5083 }
|
|
|
5084 if (c == '\n')
|
|
|
5085 {
|
|
|
5086 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
5087 Dynarr_add (dst, '\r');
|
|
|
5088 if (eol_type != EOL_CR)
|
|
|
5089 Dynarr_add (dst, c);
|
|
|
5090 }
|
|
|
5091 else
|
|
|
5092 {
|
|
|
5093 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
5094 && fit_to_be_escape_quoted (c))
|
|
|
5095 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5096 Dynarr_add (dst, c);
|
|
|
5097 }
|
|
|
5098 char_boundary = 1;
|
|
|
5099 }
|
|
|
5100
|
|
|
5101 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
5102 { /* Processing Leading Byte */
|
|
|
5103 ch = 0;
|
|
|
5104 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
5105 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
5106 ch = c;
|
|
|
5107 else if (!EQ (charset, Vcharset_control_1)
|
|
|
5108 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5109 && !EQ (charset, Vcharset_composite)
|
|
|
5110 #endif
|
|
|
5111 )
|
|
|
5112 {
|
|
|
5113 int reg;
|
|
|
5114
|
|
|
5115 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
|
5116 codesys, dst, &flags, 0);
|
|
|
5117
|
|
|
5118 /* Now determine which register to use. */
|
|
|
5119 reg = -1;
|
|
|
5120 for (i = 0; i < 4; i++)
|
|
|
5121 {
|
|
|
5122 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
|
5123 EQ (charset,
|
|
|
5124 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
|
5125 {
|
|
|
5126 reg = i;
|
|
|
5127 break;
|
|
|
5128 }
|
|
|
5129 }
|
|
|
5130
|
|
|
5131 if (reg == -1)
|
|
|
5132 {
|
|
|
5133 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
|
5134 {
|
|
|
5135 if (!NILP (str->iso2022.charset[1]) &&
|
|
|
5136 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
|
5137 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
|
5138 reg = 1;
|
|
|
5139 else if (!NILP (str->iso2022.charset[2]))
|
|
|
5140 reg = 2;
|
|
|
5141 else if (!NILP (str->iso2022.charset[3]))
|
|
|
5142 reg = 3;
|
|
|
5143 else
|
|
|
5144 reg = 0;
|
|
|
5145 }
|
|
|
5146 else
|
|
|
5147 reg = 0;
|
|
|
5148 }
|
|
|
5149
|
|
|
5150 iso2022_designate (charset, reg, str, dst);
|
|
|
5151
|
|
|
5152 /* Now invoke that register. */
|
|
|
5153 switch (reg)
|
|
|
5154 {
|
|
|
5155 case 0:
|
|
|
5156 ensure_normal_shift (str, dst);
|
|
|
5157 half = 0;
|
|
|
5158 break;
|
|
|
5159
|
|
|
5160 case 1:
|
|
|
5161 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
5162 {
|
|
|
5163 ensure_shift_out (str, dst);
|
|
|
5164 half = 0;
|
|
|
5165 }
|
|
|
5166 else
|
|
|
5167 half = 1;
|
|
|
5168 break;
|
|
|
5169
|
|
|
5170 case 2:
|
|
|
5171 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5172 {
|
|
|
5173 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5174 Dynarr_add (dst, 'N');
|
|
|
5175 half = 0;
|
|
|
5176 }
|
|
|
5177 else
|
|
|
5178 {
|
|
|
5179 Dynarr_add (dst, ISO_CODE_SS2);
|
|
|
5180 half = 1;
|
|
|
5181 }
|
|
|
5182 break;
|
|
|
5183
|
|
|
5184 case 3:
|
|
|
5185 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5186 {
|
|
|
5187 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5188 Dynarr_add (dst, 'O');
|
|
|
5189 half = 0;
|
|
|
5190 }
|
|
|
5191 else
|
|
|
5192 {
|
|
|
5193 Dynarr_add (dst, ISO_CODE_SS3);
|
|
|
5194 half = 1;
|
|
|
5195 }
|
|
|
5196 break;
|
|
|
5197
|
|
|
5198 default:
|
|
|
5199 abort ();
|
|
|
5200 }
|
|
|
5201 }
|
|
|
5202 char_boundary = 0;
|
|
|
5203 }
|
|
|
5204 else
|
|
|
5205 { /* Processing Non-ASCII character */
|
|
|
5206 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
|
5207 char_boundary = 1;
|
|
|
5208 if (EQ (charset, Vcharset_control_1))
|
|
|
5209 {
|
|
|
5210 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
5211 && fit_to_be_escape_quoted (c))
|
|
|
5212 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5213 /* you asked for it ... */
|
|
|
5214 Dynarr_add (dst, c - 0x20);
|
|
|
5215 }
|
|
|
5216 else
|
|
|
5217 {
|
|
|
5218 switch (XCHARSET_REP_BYTES (charset))
|
|
|
5219 {
|
|
|
5220 case 2:
|
|
|
5221 Dynarr_add (dst, c & charmask);
|
|
|
5222 break;
|
|
|
5223 case 3:
|
|
|
5224 if (XCHARSET_PRIVATE_P (charset))
|
|
|
5225 {
|
|
|
5226 Dynarr_add (dst, c & charmask);
|
|
|
5227 ch = 0;
|
|
|
5228 }
|
|
|
5229 else if (ch)
|
|
|
5230 {
|
|
|
5231 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5232 if (EQ (charset, Vcharset_composite))
|
|
|
5233 {
|
|
|
5234 if (in_composite)
|
|
|
5235 {
|
|
|
5236 /* #### Bother! We don't know how to
|
|
|
5237 handle this yet. */
|
|
|
5238 Dynarr_add (dst, '~');
|
|
|
5239 }
|
|
|
5240 else
|
|
|
5241 {
|
|
|
5242 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
5243 ch & 0x7F, c & 0x7F);
|
|
|
5244 Lisp_Object lstr = composite_char_string (emch);
|
|
|
5245 saved_n = n;
|
|
|
5246 saved_src = src;
|
|
|
5247 in_composite = 1;
|
|
|
5248 src = XSTRING_DATA (lstr);
|
|
|
5249 n = XSTRING_LENGTH (lstr);
|
|
|
5250 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5251 Dynarr_add (dst, '0'); /* start composing */
|
|
|
5252 }
|
|
|
5253 }
|
|
|
5254 else
|
|
|
5255 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5256 {
|
|
|
5257 Dynarr_add (dst, ch & charmask);
|
|
|
5258 Dynarr_add (dst, c & charmask);
|
|
|
5259 }
|
|
|
5260 ch = 0;
|
|
|
5261 }
|
|
|
5262 else
|
|
|
5263 {
|
|
|
5264 ch = c;
|
|
|
5265 char_boundary = 0;
|
|
|
5266 }
|
|
|
5267 break;
|
|
|
5268 case 4:
|
|
|
5269 if (ch)
|
|
|
5270 {
|
|
|
5271 Dynarr_add (dst, ch & charmask);
|
|
|
5272 Dynarr_add (dst, c & charmask);
|
|
|
5273 ch = 0;
|
|
|
5274 }
|
|
|
5275 else
|
|
|
5276 {
|
|
|
5277 ch = c;
|
|
|
5278 char_boundary = 0;
|
|
|
5279 }
|
|
|
5280 break;
|
|
|
5281 default:
|
|
|
5282 abort ();
|
|
|
5283 }
|
|
|
5284 }
|
|
|
5285 }
|
|
|
5286 }
|
|
|
5287
|
|
|
5288 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5289 if (in_composite)
|
|
|
5290 {
|
|
|
5291 n = saved_n;
|
|
|
5292 src = saved_src;
|
|
|
5293 in_composite = 0;
|
|
|
5294 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5295 Dynarr_add (dst, '1'); /* end composing */
|
|
|
5296 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
5297 }
|
|
|
5298 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5299
|
|
|
5300 if (char_boundary && flags & CODING_STATE_END)
|
|
|
5301 {
|
|
|
5302 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5303 ensure_normal_shift (str, dst);
|
|
|
5304 for (i = 0; i < 4; i++)
|
|
|
5305 {
|
|
|
5306 Lisp_Object initial_charset =
|
|
|
5307 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
5308 iso2022_designate (initial_charset, i, str, dst);
|
|
|
5309 }
|
|
|
5310 }
|
|
|
5311
|
|
|
5312 str->flags = flags;
|
|
|
5313 str->ch = ch;
|
|
|
5314 str->iso2022.current_char_boundary = char_boundary;
|
|
|
5315 str->iso2022.current_charset = charset;
|
|
|
5316 str->iso2022.current_half = half;
|
|
|
5317
|
|
|
5318 /* Verbum caro factum est! */
|
|
|
5319 }
|
|
|
5320 #endif /* MULE */
|
|
|
5321
|
|
|
5322 /************************************************************************/
|
|
|
5323 /* No-conversion methods */
|
|
|
5324 /************************************************************************/
|
|
|
5325
|
|
|
5326 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
5327 contain all 256 possible byte values and that are not to be
|
|
|
5328 interpreted as being in any particular decoding. */
|
|
|
5329 static void
|
|
|
5330 decode_coding_no_conversion (Lstream *decoding, CONST unsigned char *src,
|
|
|
5331 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5332 {
|
|
|
5333 unsigned char c;
|
|
|
5334 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
5335 unsigned int flags = str->flags;
|
|
|
5336 unsigned int ch = str->ch;
|
|
|
5337 eol_type_t eol_type = str->eol_type;
|
|
|
5338
|
|
|
5339 while (n--)
|
|
|
5340 {
|
|
|
5341 c = *src++;
|
|
|
5342
|
|
|
5343 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
5344 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
5345 label_continue_loop:;
|
|
|
5346 }
|
|
|
5347
|
|
|
5348 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
5349
|
|
|
5350 str->flags = flags;
|
|
|
5351 str->ch = ch;
|
|
|
5352 }
|
|
|
5353
|
|
|
5354 static void
|
|
|
5355 encode_coding_no_conversion (Lstream *encoding, CONST unsigned char *src,
|
|
|
5356 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5357 {
|
|
|
5358 unsigned char c;
|
|
|
5359 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
5360 unsigned int flags = str->flags;
|
|
|
5361 unsigned int ch = str->ch;
|
|
|
5362 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
5363
|
|
|
5364 while (n--)
|
|
|
5365 {
|
|
|
5366 c = *src++;
|
|
|
5367 if (c == '\n')
|
|
|
5368 {
|
|
|
5369 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
5370 Dynarr_add (dst, '\r');
|
|
|
5371 if (eol_type != EOL_CR)
|
|
|
5372 Dynarr_add (dst, '\n');
|
|
|
5373 ch = 0;
|
|
|
5374 }
|
|
|
5375 else if (BYTE_ASCII_P (c))
|
|
|
5376 {
|
|
|
5377 assert (ch == 0);
|
|
|
5378 Dynarr_add (dst, c);
|
|
|
5379 }
|
|
|
5380 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
5381 {
|
|
|
5382 assert (ch == 0);
|
|
|
5383 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
5384 c == LEADING_BYTE_CONTROL_1)
|
|
|
5385 ch = c;
|
|
|
5386 else
|
|
|
5387 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
5388 }
|
|
|
5389 else
|
|
|
5390 {
|
|
|
5391 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
|
5392 Dynarr_add (dst, c);
|
|
|
5393 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
5394 {
|
|
|
5395 assert (c < 0xC0);
|
|
|
5396 Dynarr_add (dst, c - 0x20);
|
|
|
5397 }
|
|
|
5398 /* else it should be the second or third byte of an
|
|
|
5399 untranslatable character, so ignore it */
|
|
|
5400 ch = 0;
|
|
|
5401 }
|
|
|
5402 }
|
|
|
5403
|
|
|
5404 str->flags = flags;
|
|
|
5405 str->ch = ch;
|
|
|
5406 }
|
|
|
5407
|
|
|
5408
|
|
|
5409 /************************************************************************/
|
|
|
5410 /* Simple internal/external functions */
|
|
|
5411 /************************************************************************/
|
|
|
5412
|
|
|
5413 static Extbyte_dynarr *conversion_out_dynarr;
|
|
|
5414 static Bufbyte_dynarr *conversion_in_dynarr;
|
|
|
5415
|
|
|
5416 /* Determine coding system from coding format */
|
|
|
5417
|
|
|
5418 /* #### not correct for all values of `fmt'! */
|
|
|
5419 static Lisp_Object
|
|
|
5420 external_data_format_to_coding_system (enum external_data_format fmt)
|
|
|
5421 {
|
|
|
5422 switch (fmt)
|
|
|
5423 {
|
|
|
5424 case FORMAT_FILENAME:
|
|
|
5425 case FORMAT_TERMINAL:
|
|
|
5426 if (EQ (Vfile_name_coding_system, Qnil) ||
|
|
|
5427 EQ (Vfile_name_coding_system, Qbinary))
|
|
|
5428 return Qnil;
|
|
|
5429 else
|
|
|
5430 return Fget_coding_system (Vfile_name_coding_system);
|
|
|
5431 #ifdef MULE
|
|
|
5432 case FORMAT_CTEXT:
|
|
|
5433 return Fget_coding_system (Qctext);
|
|
|
5434 #endif
|
|
|
5435 default:
|
|
|
5436 return Qnil;
|
|
|
5437 }
|
|
|
5438 }
|
|
|
5439
|
|
|
5440 Extbyte *
|
|
|
5441 convert_to_external_format (CONST Bufbyte *ptr,
|
|
|
5442 Bytecount len,
|
|
|
5443 Extcount *len_out,
|
|
|
5444 enum external_data_format fmt)
|
|
|
5445 {
|
|
|
5446 Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
|
|
|
5447
|
|
|
5448 if (!conversion_out_dynarr)
|
|
|
5449 conversion_out_dynarr = Dynarr_new (Extbyte);
|
|
|
5450 else
|
|
|
5451 Dynarr_reset (conversion_out_dynarr);
|
|
|
5452
|
|
|
5453 if (NILP (coding_system))
|
|
|
5454 {
|
|
|
5455 CONST Bufbyte *end = ptr + len;
|
|
|
5456
|
|
|
5457 for (; ptr < end;)
|
|
|
5458 {
|
|
|
5459 Bufbyte c =
|
|
|
5460 (BYTE_ASCII_P (*ptr)) ? *ptr :
|
|
|
5461 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
|
|
|
5462 (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
|
|
|
5463 '~';
|
|
|
5464
|
|
|
5465 Dynarr_add (conversion_out_dynarr, (Extbyte) c);
|
|
|
5466 INC_CHARPTR (ptr);
|
|
|
5467 }
|
|
|
5468
|
|
|
5469 #ifdef ERROR_CHECK_BUFPOS
|
|
|
5470 assert (ptr == end);
|
|
|
5471 #endif
|
|
|
5472 }
|
|
|
5473 else
|
|
|
5474 {
|
|
|
5475 Lisp_Object instream, outstream, da_outstream;
|
|
|
5476 Lstream *istr, *ostr;
|
|
|
5477 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
5478 char tempbuf[1024]; /* some random amount */
|
|
|
5479
|
|
|
5480 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
5481 da_outstream = make_dynarr_output_stream
|
|
|
5482 ((unsigned_char_dynarr *) conversion_out_dynarr);
|
|
|
5483 outstream =
|
|
|
5484 make_encoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
|
5485 istr = XLSTREAM (instream);
|
|
|
5486 ostr = XLSTREAM (outstream);
|
|
|
5487 GCPRO3 (instream, outstream, da_outstream);
|
|
|
5488 while (1)
|
|
|
5489 {
|
|
|
5490 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
5491 if (!size_in_bytes)
|
|
|
5492 break;
|
|
|
5493 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
5494 }
|
|
|
5495 Lstream_close (istr);
|
|
|
5496 Lstream_close (ostr);
|
|
|
5497 UNGCPRO;
|
|
|
5498 Lstream_delete (istr);
|
|
|
5499 Lstream_delete (ostr);
|
|
|
5500 Lstream_delete (XLSTREAM (da_outstream));
|
|
|
5501 }
|
|
|
5502
|
|
|
5503 *len_out = Dynarr_length (conversion_out_dynarr);
|
|
|
5504 Dynarr_add (conversion_out_dynarr, 0); /* remember to zero-terminate! */
|
|
|
5505 return Dynarr_atp (conversion_out_dynarr, 0);
|
|
|
5506 }
|
|
|
5507
|
|
|
5508 Bufbyte *
|
|
|
5509 convert_from_external_format (CONST Extbyte *ptr,
|
|
|
5510 Extcount len,
|
|
|
5511 Bytecount *len_out,
|
|
|
5512 enum external_data_format fmt)
|
|
|
5513 {
|
|
|
5514 Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
|
|
|
5515
|
|
|
5516 if (!conversion_in_dynarr)
|
|
|
5517 conversion_in_dynarr = Dynarr_new (Bufbyte);
|
|
|
5518 else
|
|
|
5519 Dynarr_reset (conversion_in_dynarr);
|
|
|
5520
|
|
|
5521 if (NILP (coding_system))
|
|
|
5522 {
|
|
|
5523 CONST Extbyte *end = ptr + len;
|
|
|
5524 for (; ptr < end; ptr++)
|
|
|
5525 {
|
|
|
5526 Extbyte c = *ptr;
|
|
|
5527 DECODE_ADD_BINARY_CHAR (c, conversion_in_dynarr);
|
|
|
5528 }
|
|
|
5529 }
|
|
|
5530 else
|
|
|
5531 {
|
|
|
5532 Lisp_Object instream, outstream, da_outstream;
|
|
|
5533 Lstream *istr, *ostr;
|
|
|
5534 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
5535 char tempbuf[1024]; /* some random amount */
|
|
|
5536
|
|
|
5537 instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
|
|
|
5538 da_outstream = make_dynarr_output_stream
|
|
|
5539 ((unsigned_char_dynarr *) conversion_in_dynarr);
|
|
|
5540 outstream =
|
|
|
5541 make_decoding_output_stream (XLSTREAM (da_outstream), coding_system);
|
|
|
5542 istr = XLSTREAM (instream);
|
|
|
5543 ostr = XLSTREAM (outstream);
|
|
|
5544 GCPRO3 (instream, outstream, da_outstream);
|
|
|
5545 while (1)
|
|
|
5546 {
|
|
|
5547 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
5548 if (!size_in_bytes)
|
|
|
5549 break;
|
|
|
5550 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
5551 }
|
|
|
5552 Lstream_close (istr);
|
|
|
5553 Lstream_close (ostr);
|
|
|
5554 UNGCPRO;
|
|
|
5555 Lstream_delete (istr);
|
|
|
5556 Lstream_delete (ostr);
|
|
|
5557 Lstream_delete (XLSTREAM (da_outstream));
|
|
|
5558 }
|
|
|
5559
|
|
|
5560 *len_out = Dynarr_length (conversion_in_dynarr);
|
|
|
5561 Dynarr_add (conversion_in_dynarr, 0); /* remember to zero-terminate! */
|
|
|
5562 return Dynarr_atp (conversion_in_dynarr, 0);
|
|
|
5563 }
|
|
|
5564
|
|
|
5565
|
|
|
5566 /************************************************************************/
|
|
|
5567 /* Initialization */
|
|
|
5568 /************************************************************************/
|
|
|
5569
|
|
|
5570 void
|
|
|
5571 syms_of_file_coding (void)
|
|
|
5572 {
|
|
|
5573 deferror (&Qcoding_system_error, "coding-system-error",
|
|
|
5574 "Coding-system error", Qio_error);
|
|
|
5575
|
|
|
5576 DEFSUBR (Fcoding_system_p);
|
|
|
5577 DEFSUBR (Ffind_coding_system);
|
|
|
5578 DEFSUBR (Fget_coding_system);
|
|
|
5579 DEFSUBR (Fcoding_system_list);
|
|
|
5580 DEFSUBR (Fcoding_system_name);
|
|
|
5581 DEFSUBR (Fmake_coding_system);
|
|
|
5582 DEFSUBR (Fcopy_coding_system);
|
|
|
5583 DEFSUBR (Fdefine_coding_system_alias);
|
|
|
5584 DEFSUBR (Fsubsidiary_coding_system);
|
|
|
5585
|
|
|
5586 DEFSUBR (Fcoding_system_type);
|
|
|
5587 DEFSUBR (Fcoding_system_doc_string);
|
|
|
5588 #ifdef MULE
|
|
|
5589 DEFSUBR (Fcoding_system_charset);
|
|
|
5590 #endif
|
|
|
5591 DEFSUBR (Fcoding_system_property);
|
|
|
5592
|
|
|
5593 DEFSUBR (Fcoding_category_list);
|
|
|
5594 DEFSUBR (Fset_coding_priority_list);
|
|
|
5595 DEFSUBR (Fcoding_priority_list);
|
|
|
5596 DEFSUBR (Fset_coding_category_system);
|
|
|
5597 DEFSUBR (Fcoding_category_system);
|
|
|
5598
|
|
|
5599 DEFSUBR (Fdetect_coding_region);
|
|
|
5600 DEFSUBR (Fdecode_coding_region);
|
|
|
5601 DEFSUBR (Fencode_coding_region);
|
|
|
5602 #ifdef MULE
|
|
|
5603 DEFSUBR (Fdecode_shift_jis_char);
|
|
|
5604 DEFSUBR (Fencode_shift_jis_char);
|
|
|
5605 DEFSUBR (Fdecode_big5_char);
|
|
|
5606 DEFSUBR (Fencode_big5_char);
|
|
|
5607 DEFSUBR (Fset_ucs_char);
|
|
|
5608 DEFSUBR (Fucs_char);
|
|
|
5609 DEFSUBR (Fset_char_ucs);
|
|
|
5610 DEFSUBR (Fchar_ucs);
|
|
|
5611 #endif /* MULE */
|
|
|
5612 defsymbol (&Qcoding_systemp, "coding-system-p");
|
|
|
5613 defsymbol (&Qno_conversion, "no-conversion");
|
|
|
5614 defsymbol (&Qraw_text, "raw-text");
|
|
|
5615 #ifdef MULE
|
|
|
5616 defsymbol (&Qbig5, "big5");
|
|
|
5617 defsymbol (&Qshift_jis, "shift-jis");
|
|
|
5618 defsymbol (&Qucs4, "ucs-4");
|
|
|
5619 defsymbol (&Qutf8, "utf-8");
|
|
|
5620 defsymbol (&Qccl, "ccl");
|
|
|
5621 defsymbol (&Qiso2022, "iso2022");
|
|
|
5622 #endif /* MULE */
|
|
|
5623 defsymbol (&Qmnemonic, "mnemonic");
|
|
|
5624 defsymbol (&Qeol_type, "eol-type");
|
|
|
5625 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
|
5626 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
|
5627
|
|
|
5628 defsymbol (&Qcr, "cr");
|
|
|
5629 defsymbol (&Qlf, "lf");
|
|
|
5630 defsymbol (&Qcrlf, "crlf");
|
|
|
5631 defsymbol (&Qeol_cr, "eol-cr");
|
|
|
5632 defsymbol (&Qeol_lf, "eol-lf");
|
|
|
5633 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
|
5634 #ifdef MULE
|
|
|
5635 defsymbol (&Qcharset_g0, "charset-g0");
|
|
|
5636 defsymbol (&Qcharset_g1, "charset-g1");
|
|
|
5637 defsymbol (&Qcharset_g2, "charset-g2");
|
|
|
5638 defsymbol (&Qcharset_g3, "charset-g3");
|
|
|
5639 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
|
5640 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
|
5641 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
|
5642 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
|
5643 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
|
5644 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
|
5645 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
|
|
5646
|
|
|
5647 defsymbol (&Qshort, "short");
|
|
|
5648 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
|
5649 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
|
5650 defsymbol (&Qseven, "seven");
|
|
|
5651 defsymbol (&Qlock_shift, "lock-shift");
|
|
|
5652 defsymbol (&Qescape_quoted, "escape-quoted");
|
|
|
5653 #endif /* MULE */
|
|
|
5654 defsymbol (&Qencode, "encode");
|
|
|
5655 defsymbol (&Qdecode, "decode");
|
|
|
5656
|
|
|
5657 #ifdef MULE
|
|
|
5658 defsymbol (&Qctext, "ctext");
|
|
|
5659 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
|
5660 "shift-jis");
|
|
|
5661 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
|
5662 "big5");
|
|
|
5663 defsymbol (&coding_category_symbol[CODING_CATEGORY_UCS4],
|
|
|
5664 "ucs-4");
|
|
|
5665 defsymbol (&coding_category_symbol[CODING_CATEGORY_UTF8],
|
|
|
5666 "utf-8");
|
|
|
5667 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
|
5668 "iso-7");
|
|
|
5669 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
|
5670 "iso-8-designate");
|
|
|
5671 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
|
5672 "iso-8-1");
|
|
|
5673 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
|
5674 "iso-8-2");
|
|
|
5675 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
|
5676 "iso-lock-shift");
|
|
|
5677 #endif /* MULE */
|
|
|
5678 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
|
5679 "no-conversion");
|
|
|
5680 }
|
|
|
5681
|
|
|
5682 void
|
|
|
5683 lstream_type_create_file_coding (void)
|
|
|
5684 {
|
|
|
5685 LSTREAM_HAS_METHOD (decoding, reader);
|
|
|
5686 LSTREAM_HAS_METHOD (decoding, writer);
|
|
|
5687 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
|
5688 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
|
5689 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
|
5690 LSTREAM_HAS_METHOD (decoding, closer);
|
|
|
5691 LSTREAM_HAS_METHOD (decoding, marker);
|
|
|
5692
|
|
|
5693 LSTREAM_HAS_METHOD (encoding, reader);
|
|
|
5694 LSTREAM_HAS_METHOD (encoding, writer);
|
|
|
5695 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
|
5696 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
|
5697 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
|
5698 LSTREAM_HAS_METHOD (encoding, closer);
|
|
|
5699 LSTREAM_HAS_METHOD (encoding, marker);
|
|
|
5700 }
|
|
|
5701
|
|
|
5702 void
|
|
|
5703 vars_of_file_coding (void)
|
|
|
5704 {
|
|
|
5705 int i;
|
|
|
5706
|
|
|
5707 fcd = xnew (struct file_coding_dump);
|
|
|
5708 dumpstruct (&fcd, &fcd_description);
|
|
|
5709
|
|
|
5710 /* Initialize to something reasonable ... */
|
|
|
5711 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
5712 {
|
|
|
5713 fcd->coding_category_system[i] = Qnil;
|
|
|
5714 fcd->coding_category_by_priority[i] = i;
|
|
|
5715 }
|
|
|
5716
|
|
|
5717 Fprovide (intern ("file-coding"));
|
|
|
5718
|
|
|
5719 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
5720 Coding system used for TTY keyboard input.
|
|
|
5721 Not used under a windowing system.
|
|
|
5722 */ );
|
|
|
5723 Vkeyboard_coding_system = Qnil;
|
|
|
5724
|
|
|
5725 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
5726 Coding system used for TTY display output.
|
|
|
5727 Not used under a windowing system.
|
|
|
5728 */ );
|
|
|
5729 Vterminal_coding_system = Qnil;
|
|
|
5730
|
|
|
5731 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
|
5732 Overriding coding system used when writing a file or process.
|
|
|
5733 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
5734 the coding system that will be used when a file or process is read
|
|
|
5735 in, and overrides `buffer-file-coding-system-for-read',
|
|
|
5736 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
|
5737 this one for permanent changes to the environment.
|
|
|
5738 */ );
|
|
|
5739 Vcoding_system_for_read = Qnil;
|
|
|
5740
|
|
|
5741 DEFVAR_LISP ("coding-system-for-write",
|
|
|
5742 &Vcoding_system_for_write /*
|
|
|
5743 Overriding coding system used when writing a file or process.
|
|
|
5744 You should *bind* this, not set it. If this is non-nil, it specifies
|
|
|
5745 the coding system that will be used when a file or process is wrote
|
|
|
5746 in, and overrides `buffer-file-coding-system',
|
|
|
5747 `write-region-pre-hook', etc. Use those variables instead of this one
|
|
|
5748 for permanent changes to the environment.
|
|
|
5749 */ );
|
|
|
5750 Vcoding_system_for_write = Qnil;
|
|
|
5751
|
|
|
5752 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
|
5753 Coding system used to convert pathnames when accessing files.
|
|
|
5754 */ );
|
|
|
5755 Vfile_name_coding_system = Qnil;
|
|
|
5756
|
|
|
5757 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
|
5758 Non-nil means the buffer contents are regarded as multi-byte form
|
|
|
5759 of characters, not a binary code. This affects the display, file I/O,
|
|
|
5760 and behaviors of various editing commands.
|
|
|
5761
|
|
|
5762 Setting this to nil does not do anything.
|
|
|
5763 */ );
|
|
|
5764 enable_multibyte_characters = 1;
|
|
|
5765 }
|
|
|
5766
|
|
|
5767 void
|
|
|
5768 complex_vars_of_file_coding (void)
|
|
|
5769 {
|
|
|
5770 staticpro (&Vcoding_system_hash_table);
|
|
|
5771 Vcoding_system_hash_table =
|
|
|
5772 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
5773
|
|
|
5774 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
|
|
|
5775 dumpstruct (&the_codesys_prop_dynarr, &codesys_prop_dynarr_description);
|
|
|
5776
|
|
|
5777 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
|
5778 { \
|
|
|
5779 struct codesys_prop csp; \
|
|
|
5780 csp.sym = (Sym); \
|
|
|
5781 csp.prop_type = (Prop_Type); \
|
|
|
5782 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
|
5783 } while (0)
|
|
|
5784
|
|
|
5785 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
|
5786 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
|
5787 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
|
5788 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
|
5789 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
|
5790 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
|
5791 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
|
5792 #ifdef MULE
|
|
|
5793 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
|
5794 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
|
5795 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
|
5796 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
|
5797 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
|
5798 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
|
5799 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
|
5800 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
|
5801 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
|
5802 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
|
5803 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
|
5804 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
|
5805 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
|
5806 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
|
5807 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
|
5808 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
|
5809 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
|
5810
|
|
|
5811 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
|
5812 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
|
5813 #endif /* MULE */
|
|
|
5814 /* Need to create this here or we're really screwed. */
|
|
|
5815 Fmake_coding_system
|
|
|
5816 (Qraw_text, Qno_conversion,
|
|
|
5817 build_string ("Raw text, which means it converts only line-break-codes."),
|
|
|
5818 list2 (Qmnemonic, build_string ("Raw")));
|
|
|
5819
|
|
|
5820 Fmake_coding_system
|
|
|
5821 (Qbinary, Qno_conversion,
|
|
|
5822 build_string ("Binary, which means it does not convert anything."),
|
|
|
5823 list4 (Qeol_type, Qlf,
|
|
|
5824 Qmnemonic, build_string ("Binary")));
|
|
|
5825
|
|
|
5826 Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
|
|
|
5827
|
|
|
5828 /* Need this for bootstrapping */
|
|
|
5829 fcd->coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
|
|
5830 Fget_coding_system (Qraw_text);
|
|
|
5831
|
|
|
5832 #ifdef MULE
|
|
|
5833 {
|
|
|
5834 unsigned int i;
|
|
|
5835
|
|
|
5836 for (i = 0; i < 65536; i++)
|
|
|
5837 fcd->ucs_to_mule_table[i] = Qnil;
|
|
|
5838 }
|
|
|
5839 staticpro (&mule_to_ucs_table);
|
|
|
5840 mule_to_ucs_table = Fmake_char_table(Qgeneric);
|
|
|
5841 #endif /* MULE */
|
|
|
5842 }
|
