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