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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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440
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33 #include "opaque.h"
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428
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34 #ifdef MULE
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35 #include "mule-ccl.h"
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36 #include "chartab.h"
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37 #endif
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38 #include "file-coding.h"
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39
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40 Lisp_Object Qcoding_system_error;
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41
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42 Lisp_Object Vkeyboard_coding_system;
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43 Lisp_Object Vterminal_coding_system;
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44 Lisp_Object Vcoding_system_for_read;
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45 Lisp_Object Vcoding_system_for_write;
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46 Lisp_Object Vfile_name_coding_system;
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47
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48 /* Table of symbols identifying each coding category. */
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49 Lisp_Object coding_category_symbol[CODING_CATEGORY_LAST + 1];
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50
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51
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52
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53 struct file_coding_dump {
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54 /* Coding system currently associated with each coding category. */
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55 Lisp_Object coding_category_system[CODING_CATEGORY_LAST + 1];
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56
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57 /* Table of all coding categories in decreasing order of priority.
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58 This describes a permutation of the possible coding categories. */
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59 int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
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60
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440
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61 #ifdef MULE
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428
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62 Lisp_Object ucs_to_mule_table[65536];
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440
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63 #endif
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428
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64 } *fcd;
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65
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66 static const struct lrecord_description fcd_description_1[] = {
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440
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67 { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, coding_category_system), CODING_CATEGORY_LAST + 1 },
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68 #ifdef MULE
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442
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69 { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, ucs_to_mule_table), countof (fcd->ucs_to_mule_table) },
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440
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70 #endif
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428
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71 { XD_END }
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72 };
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73
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74 static const struct struct_description fcd_description = {
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440
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75 sizeof (struct file_coding_dump),
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428
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76 fcd_description_1
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77 };
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78
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79 Lisp_Object mule_to_ucs_table;
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80
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81 Lisp_Object Qcoding_systemp;
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82
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83 Lisp_Object Qraw_text, Qno_conversion, Qccl, Qiso2022;
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84 /* Qinternal in general.c */
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85
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86 Lisp_Object Qmnemonic, Qeol_type;
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87 Lisp_Object Qcr, Qcrlf, Qlf;
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88 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
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89 Lisp_Object Qpost_read_conversion;
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90 Lisp_Object Qpre_write_conversion;
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91
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92 #ifdef MULE
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93 Lisp_Object Qucs4, Qutf8;
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94 Lisp_Object Qbig5, Qshift_jis;
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95 Lisp_Object Qcharset_g0, Qcharset_g1, Qcharset_g2, Qcharset_g3;
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96 Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
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97 Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
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98 Lisp_Object Qno_iso6429;
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99 Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
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440
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100 Lisp_Object Qescape_quoted;
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428
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101 Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
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102 #endif
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103 Lisp_Object Qencode, Qdecode;
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104
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105 Lisp_Object Vcoding_system_hash_table;
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106
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107 int enable_multibyte_characters;
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108
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109 #ifdef MULE
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110 /* Additional information used by the ISO2022 decoder and detector. */
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111 struct iso2022_decoder
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112 {
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113 /* CHARSET holds the character sets currently assigned to the G0
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114 through G3 variables. It is initialized from the array
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115 INITIAL_CHARSET in CODESYS. */
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116 Lisp_Object charset[4];
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117
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118 /* Which registers are currently invoked into the left (GL) and
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119 right (GR) halves of the 8-bit encoding space? */
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120 int register_left, register_right;
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121
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122 /* ISO_ESC holds a value indicating part of an escape sequence
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123 that has already been seen. */
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124 enum iso_esc_flag esc;
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125
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126 /* This records the bytes we've seen so far in an escape sequence,
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127 in case the sequence is invalid (we spit out the bytes unchanged). */
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128 unsigned char esc_bytes[8];
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129
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130 /* Index for next byte to store in ISO escape sequence. */
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131 int esc_bytes_index;
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132
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133 #ifdef ENABLE_COMPOSITE_CHARS
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134 /* Stuff seen so far when composing a string. */
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135 unsigned_char_dynarr *composite_chars;
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136 #endif
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137
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138 /* If we saw an invalid designation sequence for a particular
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139 register, we flag it here and switch to ASCII. The next time we
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140 see a valid designation for this register, we turn off the flag
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141 and do the designation normally, but pretend the sequence was
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142 invalid. The effect of all this is that (most of the time) the
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143 escape sequences for both the switch to the unknown charset, and
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144 the switch back to the known charset, get inserted literally into
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145 the buffer and saved out as such. The hope is that we can
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146 preserve the escape sequences so that the resulting written out
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147 file makes sense. If we don't do any of this, the designation
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148 to the invalid charset will be preserved but that switch back
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149 to the known charset will probably get eaten because it was
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150 the same charset that was already present in the register. */
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151 unsigned char invalid_designated[4];
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152
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153 /* We try to do similar things as above for direction-switching
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154 sequences. If we encountered a direction switch while an
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155 invalid designation was present, or an invalid designation
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156 just after a direction switch (i.e. no valid designation
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157 encountered yet), we insert the direction-switch escape
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158 sequence literally into the output stream, and later on
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159 insert the corresponding direction-restoring escape sequence
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160 literally also. */
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161 unsigned int switched_dir_and_no_valid_charset_yet :1;
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162 unsigned int invalid_switch_dir :1;
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163
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164 /* Tells the decoder to output the escape sequence literally
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165 even though it was valid. Used in the games we play to
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166 avoid lossage when we encounter invalid designations. */
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167 unsigned int output_literally :1;
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168 /* We encountered a direction switch followed by an invalid
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169 designation. We didn't output the direction switch
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170 literally because we didn't know about the invalid designation;
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171 but we have to do so now. */
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172 unsigned int output_direction_sequence :1;
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173 };
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174 #endif /* MULE */
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175 EXFUN (Fcopy_coding_system, 2);
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176 #ifdef MULE
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177 struct detection_state;
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178 static int detect_coding_sjis (struct detection_state *st,
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442
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179 const unsigned char *src,
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428
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180 unsigned int n);
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181 static void decode_coding_sjis (Lstream *decoding,
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442
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182 const unsigned char *src,
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428
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183 unsigned_char_dynarr *dst,
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184 unsigned int n);
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185 static void encode_coding_sjis (Lstream *encoding,
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442
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186 const unsigned char *src,
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428
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187 unsigned_char_dynarr *dst,
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188 unsigned int n);
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189 static int detect_coding_big5 (struct detection_state *st,
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442
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190 const unsigned char *src,
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428
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191 unsigned int n);
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192 static void decode_coding_big5 (Lstream *decoding,
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442
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193 const unsigned char *src,
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428
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194 unsigned_char_dynarr *dst, unsigned int n);
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195 static void encode_coding_big5 (Lstream *encoding,
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442
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196 const unsigned char *src,
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428
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197 unsigned_char_dynarr *dst, unsigned int n);
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198 static int detect_coding_ucs4 (struct detection_state *st,
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442
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199 const unsigned char *src,
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428
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200 unsigned int n);
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201 static void decode_coding_ucs4 (Lstream *decoding,
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442
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202 const unsigned char *src,
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428
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203 unsigned_char_dynarr *dst, unsigned int n);
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204 static void encode_coding_ucs4 (Lstream *encoding,
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442
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205 const unsigned char *src,
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428
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206 unsigned_char_dynarr *dst, unsigned int n);
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207 static int detect_coding_utf8 (struct detection_state *st,
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442
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208 const unsigned char *src,
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428
|
209 unsigned int n);
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210 static void decode_coding_utf8 (Lstream *decoding,
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442
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211 const unsigned char *src,
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428
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212 unsigned_char_dynarr *dst, unsigned int n);
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213 static void encode_coding_utf8 (Lstream *encoding,
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442
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214 const unsigned char *src,
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428
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215 unsigned_char_dynarr *dst, unsigned int n);
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216 static int postprocess_iso2022_mask (int mask);
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217 static void reset_iso2022 (Lisp_Object coding_system,
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218 struct iso2022_decoder *iso);
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219 static int detect_coding_iso2022 (struct detection_state *st,
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442
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220 const unsigned char *src,
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428
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221 unsigned int n);
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222 static void decode_coding_iso2022 (Lstream *decoding,
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442
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223 const unsigned char *src,
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428
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224 unsigned_char_dynarr *dst, unsigned int n);
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225 static void encode_coding_iso2022 (Lstream *encoding,
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442
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226 const unsigned char *src,
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428
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227 unsigned_char_dynarr *dst, unsigned int n);
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228 #endif /* MULE */
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229 static void decode_coding_no_conversion (Lstream *decoding,
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442
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230 const unsigned char *src,
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428
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231 unsigned_char_dynarr *dst,
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232 unsigned int n);
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233 static void encode_coding_no_conversion (Lstream *encoding,
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442
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234 const unsigned char *src,
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428
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235 unsigned_char_dynarr *dst,
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236 unsigned int n);
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442
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237 static void mule_decode (Lstream *decoding, const unsigned char *src,
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428
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238 unsigned_char_dynarr *dst, unsigned int n);
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442
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239 static void mule_encode (Lstream *encoding, const unsigned char *src,
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428
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240 unsigned_char_dynarr *dst, unsigned int n);
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241
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242 typedef struct codesys_prop codesys_prop;
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243 struct codesys_prop
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244 {
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245 Lisp_Object sym;
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246 int prop_type;
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247 };
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248
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249 typedef struct
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250 {
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251 Dynarr_declare (codesys_prop);
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252 } codesys_prop_dynarr;
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253
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254 static const struct lrecord_description codesys_prop_description_1[] = {
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440
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255 { XD_LISP_OBJECT, offsetof (codesys_prop, sym) },
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428
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256 { XD_END }
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257 };
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258
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259 static const struct struct_description codesys_prop_description = {
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440
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260 sizeof (codesys_prop),
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428
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261 codesys_prop_description_1
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262 };
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263
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264 static const struct lrecord_description codesys_prop_dynarr_description_1[] = {
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440
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265 XD_DYNARR_DESC (codesys_prop_dynarr, &codesys_prop_description),
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428
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266 { XD_END }
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267 };
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268
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269 static const struct struct_description codesys_prop_dynarr_description = {
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440
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270 sizeof (codesys_prop_dynarr),
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428
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271 codesys_prop_dynarr_description_1
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272 };
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273
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274 codesys_prop_dynarr *the_codesys_prop_dynarr;
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275
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276 enum codesys_prop_enum
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277 {
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278 CODESYS_PROP_ALL_OK,
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279 CODESYS_PROP_ISO2022,
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280 CODESYS_PROP_CCL
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281 };
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282
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283
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284 /************************************************************************/
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285 /* Coding system functions */
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286 /************************************************************************/
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287
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288 static Lisp_Object mark_coding_system (Lisp_Object);
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289 static void print_coding_system (Lisp_Object, Lisp_Object, int);
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290 static void finalize_coding_system (void *header, int for_disksave);
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291
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292 #ifdef MULE
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293 static const struct lrecord_description ccs_description_1[] = {
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440
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294 { XD_LISP_OBJECT, offsetof (charset_conversion_spec, from_charset) },
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295 { XD_LISP_OBJECT, offsetof (charset_conversion_spec, to_charset) },
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428
|
296 { XD_END }
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297 };
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|
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298
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|
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299 static const struct struct_description ccs_description = {
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440
|
300 sizeof (charset_conversion_spec),
|
|
428
|
301 ccs_description_1
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|
|
302 };
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|
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303
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|
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304 static const struct lrecord_description ccsd_description_1[] = {
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440
|
305 XD_DYNARR_DESC (charset_conversion_spec_dynarr, &ccs_description),
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428
|
306 { XD_END }
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|
|
307 };
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308
|
|
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309 static const struct struct_description ccsd_description = {
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440
|
310 sizeof (charset_conversion_spec_dynarr),
|
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428
|
311 ccsd_description_1
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|
|
312 };
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|
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313 #endif
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314
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|
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315 static const struct lrecord_description coding_system_description[] = {
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440
|
316 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, name) },
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317 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, doc_string) },
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318 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, mnemonic) },
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319 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, post_read_conversion) },
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320 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, pre_write_conversion) },
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321 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_lf) },
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322 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_crlf) },
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323 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_cr) },
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428
|
324 #ifdef MULE
|
|
440
|
325 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, iso2022.initial_charset), 4 },
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|
|
326 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
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327 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
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328 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.decode) },
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|
329 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.encode) },
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428
|
330 #endif
|
|
|
331 { XD_END }
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|
|
332 };
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|
|
333
|
|
|
334 DEFINE_LRECORD_IMPLEMENTATION ("coding-system", coding_system,
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|
|
335 mark_coding_system, print_coding_system,
|
|
|
336 finalize_coding_system,
|
|
|
337 0, 0, coding_system_description,
|
|
440
|
338 Lisp_Coding_System);
|
|
428
|
339
|
|
|
340 static Lisp_Object
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|
|
341 mark_coding_system (Lisp_Object obj)
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|
|
342 {
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|
|
343 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
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|
|
344
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|
|
345 mark_object (CODING_SYSTEM_NAME (codesys));
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|
|
346 mark_object (CODING_SYSTEM_DOC_STRING (codesys));
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|
|
347 mark_object (CODING_SYSTEM_MNEMONIC (codesys));
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|
|
348 mark_object (CODING_SYSTEM_EOL_LF (codesys));
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|
|
349 mark_object (CODING_SYSTEM_EOL_CRLF (codesys));
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|
|
350 mark_object (CODING_SYSTEM_EOL_CR (codesys));
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|
|
351
|
|
|
352 switch (CODING_SYSTEM_TYPE (codesys))
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|
|
353 {
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|
|
354 #ifdef MULE
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|
|
355 int i;
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|
|
356 case CODESYS_ISO2022:
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|
|
357 for (i = 0; i < 4; i++)
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|
|
358 mark_object (CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i));
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|
|
359 if (codesys->iso2022.input_conv)
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|
|
360 {
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|
|
361 for (i = 0; i < Dynarr_length (codesys->iso2022.input_conv); i++)
|
|
|
362 {
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|
|
363 struct charset_conversion_spec *ccs =
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|
|
364 Dynarr_atp (codesys->iso2022.input_conv, i);
|
|
|
365 mark_object (ccs->from_charset);
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|
|
366 mark_object (ccs->to_charset);
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|
|
367 }
|
|
|
368 }
|
|
|
369 if (codesys->iso2022.output_conv)
|
|
|
370 {
|
|
|
371 for (i = 0; i < Dynarr_length (codesys->iso2022.output_conv); i++)
|
|
|
372 {
|
|
|
373 struct charset_conversion_spec *ccs =
|
|
|
374 Dynarr_atp (codesys->iso2022.output_conv, i);
|
|
|
375 mark_object (ccs->from_charset);
|
|
|
376 mark_object (ccs->to_charset);
|
|
|
377 }
|
|
|
378 }
|
|
|
379 break;
|
|
|
380
|
|
|
381 case CODESYS_CCL:
|
|
|
382 mark_object (CODING_SYSTEM_CCL_DECODE (codesys));
|
|
|
383 mark_object (CODING_SYSTEM_CCL_ENCODE (codesys));
|
|
|
384 break;
|
|
|
385 #endif /* MULE */
|
|
|
386 default:
|
|
|
387 break;
|
|
|
388 }
|
|
|
389
|
|
|
390 mark_object (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
|
|
|
391 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
|
|
|
392 }
|
|
|
393
|
|
|
394 static void
|
|
|
395 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
|
|
|
396 int escapeflag)
|
|
|
397 {
|
|
|
398 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
|
399 if (print_readably)
|
|
|
400 error ("printing unreadable object #<coding_system 0x%x>",
|
|
|
401 c->header.uid);
|
|
|
402
|
|
|
403 write_c_string ("#<coding_system ", printcharfun);
|
|
|
404 print_internal (c->name, printcharfun, 1);
|
|
|
405 write_c_string (">", printcharfun);
|
|
|
406 }
|
|
|
407
|
|
|
408 static void
|
|
|
409 finalize_coding_system (void *header, int for_disksave)
|
|
|
410 {
|
|
|
411 Lisp_Coding_System *c = (Lisp_Coding_System *) header;
|
|
|
412 /* Since coding systems never go away, this function is not
|
|
|
413 necessary. But it would be necessary if we changed things
|
|
|
414 so that coding systems could go away. */
|
|
|
415 if (!for_disksave) /* see comment in lstream.c */
|
|
|
416 {
|
|
|
417 switch (CODING_SYSTEM_TYPE (c))
|
|
|
418 {
|
|
|
419 #ifdef MULE
|
|
|
420 case CODESYS_ISO2022:
|
|
|
421 if (c->iso2022.input_conv)
|
|
|
422 {
|
|
|
423 Dynarr_free (c->iso2022.input_conv);
|
|
|
424 c->iso2022.input_conv = 0;
|
|
|
425 }
|
|
|
426 if (c->iso2022.output_conv)
|
|
|
427 {
|
|
|
428 Dynarr_free (c->iso2022.output_conv);
|
|
|
429 c->iso2022.output_conv = 0;
|
|
|
430 }
|
|
|
431 break;
|
|
|
432 #endif /* MULE */
|
|
|
433 default:
|
|
|
434 break;
|
|
|
435 }
|
|
|
436 }
|
|
|
437 }
|
|
|
438
|
|
438
|
439 static eol_type_t
|
|
428
|
440 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
441 {
|
|
|
442 CHECK_SYMBOL (symbol);
|
|
|
443 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
444 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
445 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
446 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
447
|
|
|
448 signal_simple_error ("Unrecognized eol type", symbol);
|
|
|
449 return EOL_AUTODETECT; /* not reached */
|
|
|
450 }
|
|
|
451
|
|
|
452 static Lisp_Object
|
|
438
|
453 eol_type_to_symbol (eol_type_t type)
|
|
428
|
454 {
|
|
|
455 switch (type)
|
|
|
456 {
|
|
|
457 default: abort ();
|
|
|
458 case EOL_LF: return Qlf;
|
|
|
459 case EOL_CRLF: return Qcrlf;
|
|
|
460 case EOL_CR: return Qcr;
|
|
|
461 case EOL_AUTODETECT: return Qnil;
|
|
|
462 }
|
|
|
463 }
|
|
|
464
|
|
|
465 static void
|
|
|
466 setup_eol_coding_systems (Lisp_Coding_System *codesys)
|
|
|
467 {
|
|
|
468 Lisp_Object codesys_obj;
|
|
|
469 int len = string_length (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name);
|
|
|
470 char *codesys_name = (char *) alloca (len + 7);
|
|
|
471 int mlen = -1;
|
|
|
472 char *codesys_mnemonic=0;
|
|
|
473
|
|
|
474 Lisp_Object codesys_name_sym, sub_codesys_obj;
|
|
|
475
|
|
|
476 /* kludge */
|
|
|
477
|
|
|
478 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
479
|
|
|
480 memcpy (codesys_name,
|
|
|
481 string_data (XSYMBOL (CODING_SYSTEM_NAME (codesys))->name), len);
|
|
|
482
|
|
|
483 if (STRINGP (CODING_SYSTEM_MNEMONIC (codesys)))
|
|
|
484 {
|
|
|
485 mlen = XSTRING_LENGTH (CODING_SYSTEM_MNEMONIC (codesys));
|
|
|
486 codesys_mnemonic = (char *) alloca (mlen + 7);
|
|
|
487 memcpy (codesys_mnemonic,
|
|
|
488 XSTRING_DATA (CODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
|
489 }
|
|
|
490
|
|
|
491 #define DEFINE_SUB_CODESYS(op_sys, op_sys_abbr, Type) do { \
|
|
|
492 strcpy (codesys_name + len, "-" op_sys); \
|
|
|
493 if (mlen != -1) \
|
|
|
494 strcpy (codesys_mnemonic + mlen, op_sys_abbr); \
|
|
|
495 codesys_name_sym = intern (codesys_name); \
|
|
|
496 sub_codesys_obj = Fcopy_coding_system (codesys_obj, codesys_name_sym); \
|
|
|
497 XCODING_SYSTEM_EOL_TYPE (sub_codesys_obj) = Type; \
|
|
|
498 if (mlen != -1) \
|
|
|
499 XCODING_SYSTEM_MNEMONIC(sub_codesys_obj) = \
|
|
|
500 build_string (codesys_mnemonic); \
|
|
|
501 CODING_SYSTEM_##Type (codesys) = sub_codesys_obj; \
|
|
|
502 } while (0)
|
|
|
503
|
|
|
504 DEFINE_SUB_CODESYS("unix", "", EOL_LF);
|
|
|
505 DEFINE_SUB_CODESYS("dos", ":T", EOL_CRLF);
|
|
|
506 DEFINE_SUB_CODESYS("mac", ":t", EOL_CR);
|
|
|
507 }
|
|
|
508
|
|
|
509 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
|
510 Return t if OBJECT is a coding system.
|
|
|
511 A coding system is an object that defines how text containing multiple
|
|
|
512 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
513 The coding system is used to decode the stream into a series of
|
|
|
514 characters (which may be from multiple charsets) when the text is read
|
|
|
515 from a file or process, and is used to encode the text back into the
|
|
|
516 same format when it is written out to a file or process.
|
|
|
517
|
|
|
518 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
519 Text, which is used for inter-client data under the X Window System)
|
|
|
520 use escape sequences to switch between different charsets -- Japanese
|
|
|
521 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
522 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
|
523 `make-coding-system' for more information.
|
|
|
524
|
|
|
525 Coding systems are normally identified using a symbol, and the
|
|
|
526 symbol is accepted in place of the actual coding system object whenever
|
|
|
527 a coding system is called for. (This is similar to how faces work.)
|
|
|
528 */
|
|
|
529 (object))
|
|
|
530 {
|
|
|
531 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
532 }
|
|
|
533
|
|
|
534 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
535 Retrieve the coding system of the given name.
|
|
|
536
|
|
|
537 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
538 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
539 If there is no such coding system, nil is returned. Otherwise the
|
|
|
540 associated coding system object is returned.
|
|
|
541 */
|
|
|
542 (coding_system_or_name))
|
|
|
543 {
|
|
|
544 if (NILP (coding_system_or_name))
|
|
|
545 coding_system_or_name = Qbinary;
|
|
440
|
546 else if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
547 return coding_system_or_name;
|
|
428
|
548 else
|
|
|
549 CHECK_SYMBOL (coding_system_or_name);
|
|
|
550
|
|
440
|
551 while (1)
|
|
|
552 {
|
|
|
553 coding_system_or_name =
|
|
|
554 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
|
|
555
|
|
|
556 if (CODING_SYSTEMP (coding_system_or_name) || NILP (coding_system_or_name))
|
|
|
557 return coding_system_or_name;
|
|
|
558 }
|
|
428
|
559 }
|
|
|
560
|
|
|
561 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
562 Retrieve the coding system of the given name.
|
|
|
563 Same as `find-coding-system' except that if there is no such
|
|
|
564 coding system, an error is signaled instead of returning nil.
|
|
|
565 */
|
|
|
566 (name))
|
|
|
567 {
|
|
|
568 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
569
|
|
|
570 if (NILP (coding_system))
|
|
|
571 signal_simple_error ("No such coding system", name);
|
|
|
572 return coding_system;
|
|
|
573 }
|
|
|
574
|
|
|
575 /* We store the coding systems in hash tables with the names as the key and the
|
|
|
576 actual coding system object as the value. Occasionally we need to use them
|
|
|
577 in a list format. These routines provide us with that. */
|
|
|
578 struct coding_system_list_closure
|
|
|
579 {
|
|
|
580 Lisp_Object *coding_system_list;
|
|
|
581 };
|
|
|
582
|
|
|
583 static int
|
|
|
584 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
|
|
|
585 void *coding_system_list_closure)
|
|
|
586 {
|
|
|
587 /* This function can GC */
|
|
|
588 struct coding_system_list_closure *cscl =
|
|
|
589 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
|
590 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
|
591
|
|
432
|
592 *coding_system_list = Fcons (key, *coding_system_list);
|
|
428
|
593 return 0;
|
|
|
594 }
|
|
|
595
|
|
|
596 DEFUN ("coding-system-list", Fcoding_system_list, 0, 0, 0, /*
|
|
|
597 Return a list of the names of all defined coding systems.
|
|
|
598 */
|
|
|
599 ())
|
|
|
600 {
|
|
|
601 Lisp_Object coding_system_list = Qnil;
|
|
|
602 struct gcpro gcpro1;
|
|
|
603 struct coding_system_list_closure coding_system_list_closure;
|
|
|
604
|
|
|
605 GCPRO1 (coding_system_list);
|
|
|
606 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
|
607 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
|
|
608 &coding_system_list_closure);
|
|
|
609 UNGCPRO;
|
|
|
610
|
|
|
611 return coding_system_list;
|
|
|
612 }
|
|
|
613
|
|
|
614 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
615 Return the name of the given coding system.
|
|
|
616 */
|
|
|
617 (coding_system))
|
|
|
618 {
|
|
|
619 coding_system = Fget_coding_system (coding_system);
|
|
|
620 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
621 }
|
|
|
622
|
|
|
623 static Lisp_Coding_System *
|
|
|
624 allocate_coding_system (enum coding_system_type type, Lisp_Object name)
|
|
|
625 {
|
|
|
626 Lisp_Coding_System *codesys =
|
|
|
627 alloc_lcrecord_type (Lisp_Coding_System, &lrecord_coding_system);
|
|
|
628
|
|
|
629 zero_lcrecord (codesys);
|
|
|
630 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
631 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
|
632 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_AUTODETECT;
|
|
|
633 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
634 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
635 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
|
636 CODING_SYSTEM_TYPE (codesys) = type;
|
|
|
637 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
|
|
|
638 #ifdef MULE
|
|
|
639 if (type == CODESYS_ISO2022)
|
|
|
640 {
|
|
|
641 int i;
|
|
|
642 for (i = 0; i < 4; i++)
|
|
|
643 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i) = Qnil;
|
|
|
644 }
|
|
|
645 else if (type == CODESYS_CCL)
|
|
|
646 {
|
|
|
647 CODING_SYSTEM_CCL_DECODE (codesys) = Qnil;
|
|
|
648 CODING_SYSTEM_CCL_ENCODE (codesys) = Qnil;
|
|
|
649 }
|
|
|
650 #endif /* MULE */
|
|
|
651 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
652
|
|
|
653 return codesys;
|
|
|
654 }
|
|
|
655
|
|
|
656 #ifdef MULE
|
|
|
657 /* Given a list of charset conversion specs as specified in a Lisp
|
|
|
658 program, parse it into STORE_HERE. */
|
|
|
659
|
|
|
660 static void
|
|
|
661 parse_charset_conversion_specs (charset_conversion_spec_dynarr *store_here,
|
|
|
662 Lisp_Object spec_list)
|
|
|
663 {
|
|
|
664 Lisp_Object rest;
|
|
|
665
|
|
|
666 EXTERNAL_LIST_LOOP (rest, spec_list)
|
|
|
667 {
|
|
|
668 Lisp_Object car = XCAR (rest);
|
|
|
669 Lisp_Object from, to;
|
|
|
670 struct charset_conversion_spec spec;
|
|
|
671
|
|
|
672 if (!CONSP (car) || !CONSP (XCDR (car)) || !NILP (XCDR (XCDR (car))))
|
|
|
673 signal_simple_error ("Invalid charset conversion spec", car);
|
|
|
674 from = Fget_charset (XCAR (car));
|
|
|
675 to = Fget_charset (XCAR (XCDR (car)));
|
|
|
676 if (XCHARSET_TYPE (from) != XCHARSET_TYPE (to))
|
|
|
677 signal_simple_error_2
|
|
|
678 ("Attempted conversion between different charset types",
|
|
|
679 from, to);
|
|
|
680 spec.from_charset = from;
|
|
|
681 spec.to_charset = to;
|
|
|
682
|
|
|
683 Dynarr_add (store_here, spec);
|
|
|
684 }
|
|
|
685 }
|
|
|
686
|
|
|
687 /* Given a dynarr LOAD_HERE of internally-stored charset conversion
|
|
|
688 specs, return the equivalent as the Lisp programmer would see it.
|
|
|
689
|
|
|
690 If LOAD_HERE is 0, return Qnil. */
|
|
|
691
|
|
|
692 static Lisp_Object
|
|
|
693 unparse_charset_conversion_specs (charset_conversion_spec_dynarr *load_here)
|
|
|
694 {
|
|
|
695 int i;
|
|
|
696 Lisp_Object result;
|
|
|
697
|
|
|
698 if (!load_here)
|
|
|
699 return Qnil;
|
|
|
700 for (i = 0, result = Qnil; i < Dynarr_length (load_here); i++)
|
|
|
701 {
|
|
|
702 struct charset_conversion_spec *ccs = Dynarr_atp (load_here, i);
|
|
|
703 result = Fcons (list2 (ccs->from_charset, ccs->to_charset), result);
|
|
|
704 }
|
|
|
705
|
|
|
706 return Fnreverse (result);
|
|
|
707 }
|
|
|
708
|
|
|
709 #endif /* MULE */
|
|
|
710
|
|
|
711 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
712 Register symbol NAME as a coding system.
|
|
|
713
|
|
|
714 TYPE describes the conversion method used and should be one of
|
|
|
715
|
|
|
716 nil or 'undecided
|
|
|
717 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
718 used in the file.
|
|
|
719 'no-conversion
|
|
|
720 No conversion. Use this for binary files and such. On output,
|
|
|
721 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
722 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
723 characters will only be present if you explicitly insert them.)
|
|
|
724 'shift-jis
|
|
|
725 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
|
726 'ucs-4
|
|
|
727 ISO 10646 UCS-4 encoding.
|
|
|
728 'utf-8
|
|
|
729 ISO 10646 UTF-8 encoding.
|
|
|
730 'iso2022
|
|
|
731 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
732 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
733 standard Unix encoding for Japanese and other languages), and
|
|
|
734 Compound Text (the encoding used in X11). You can specify more
|
|
442
|
735 specific information about the conversion with the PROPS argument.
|
|
428
|
736 'big5
|
|
|
737 Big5 (the encoding commonly used for Taiwanese).
|
|
|
738 'ccl
|
|
|
739 The conversion is performed using a user-written pseudo-code
|
|
|
740 program. CCL (Code Conversion Language) is the name of this
|
|
|
741 pseudo-code.
|
|
|
742 'internal
|
|
|
743 Write out or read in the raw contents of the memory representing
|
|
|
744 the buffer's text. This is primarily useful for debugging
|
|
|
745 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
746 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
747 WARNING: Reading in a file using 'internal conversion can result
|
|
|
748 in an internal inconsistency in the memory representing a
|
|
|
749 buffer's text, which will produce unpredictable results and may
|
|
|
750 cause XEmacs to crash. Under normal circumstances you should
|
|
|
751 never use 'internal conversion.
|
|
|
752
|
|
|
753 DOC-STRING is a string describing the coding system.
|
|
|
754
|
|
|
755 PROPS is a property list, describing the specific nature of the
|
|
|
756 character set. Recognized properties are:
|
|
|
757
|
|
|
758 'mnemonic
|
|
|
759 String to be displayed in the modeline when this coding system is
|
|
|
760 active.
|
|
|
761
|
|
|
762 'eol-type
|
|
|
763 End-of-line conversion to be used. It should be one of
|
|
|
764
|
|
|
765 nil
|
|
|
766 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
767 or CR). Also generate subsidiary coding systems named
|
|
|
768 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
769 identical to this coding system but have an EOL-TYPE
|
|
|
770 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
771 'lf
|
|
|
772 The end of a line is marked externally using ASCII LF.
|
|
|
773 Since this is also the way that XEmacs represents an
|
|
|
774 end-of-line internally, specifying this option results
|
|
|
775 in no end-of-line conversion. This is the standard
|
|
|
776 format for Unix text files.
|
|
|
777 'crlf
|
|
|
778 The end of a line is marked externally using ASCII
|
|
|
779 CRLF. This is the standard format for MS-DOS text
|
|
|
780 files.
|
|
|
781 'cr
|
|
|
782 The end of a line is marked externally using ASCII CR.
|
|
|
783 This is the standard format for Macintosh text files.
|
|
|
784 t
|
|
|
785 Automatically detect the end-of-line type but do not
|
|
|
786 generate subsidiary coding systems. (This value is
|
|
|
787 converted to nil when stored internally, and
|
|
|
788 `coding-system-property' will return nil.)
|
|
|
789
|
|
|
790 'post-read-conversion
|
|
|
791 Function called after a file has been read in, to perform the
|
|
|
792 decoding. Called with two arguments, BEG and END, denoting
|
|
|
793 a region of the current buffer to be decoded.
|
|
|
794
|
|
|
795 'pre-write-conversion
|
|
|
796 Function called before a file is written out, to perform the
|
|
|
797 encoding. Called with two arguments, BEG and END, denoting
|
|
|
798 a region of the current buffer to be encoded.
|
|
|
799
|
|
|
800
|
|
|
801 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
802
|
|
|
803 'charset-g0
|
|
|
804 'charset-g1
|
|
|
805 'charset-g2
|
|
|
806 'charset-g3
|
|
|
807 The character set initially designated to the G0 - G3 registers.
|
|
|
808 The value should be one of
|
|
|
809
|
|
|
810 -- A charset object (designate that character set)
|
|
|
811 -- nil (do not ever use this register)
|
|
|
812 -- t (no character set is initially designated to
|
|
|
813 the register, but may be later on; this automatically
|
|
|
814 sets the corresponding `force-g*-on-output' property)
|
|
|
815
|
|
|
816 'force-g0-on-output
|
|
|
817 'force-g1-on-output
|
|
|
818 'force-g2-on-output
|
|
|
819 'force-g2-on-output
|
|
|
820 If non-nil, send an explicit designation sequence on output before
|
|
|
821 using the specified register.
|
|
|
822
|
|
|
823 'short
|
|
|
824 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
825 "ESC $ B" on output in place of the full designation sequences
|
|
|
826 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
|
827
|
|
|
828 'no-ascii-eol
|
|
|
829 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
830 Setting this to non-nil also suppresses other state-resetting that
|
|
|
831 normally happens at the end of a line.
|
|
|
832
|
|
|
833 'no-ascii-cntl
|
|
|
834 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
835
|
|
|
836 'seven
|
|
|
837 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
838 environment.
|
|
|
839
|
|
|
840 'lock-shift
|
|
|
841 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
842 or designation by escape sequence.
|
|
|
843
|
|
|
844 'no-iso6429
|
|
|
845 If non-nil, don't use ISO6429's direction specification.
|
|
|
846
|
|
|
847 'escape-quoted
|
|
|
848 If non-nil, literal control characters that are the same as
|
|
|
849 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
850 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
851 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
|
852 so that they can be properly distinguished from an escape sequence.
|
|
|
853 (Note that doing this results in a non-portable encoding.) This
|
|
|
854 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
855 is a good choice for a quoting character because there are no
|
|
|
856 escape sequences whose second byte is a character from the Control-0
|
|
|
857 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
858 ISO2022 standard.
|
|
|
859
|
|
|
860 'input-charset-conversion
|
|
|
861 A list of conversion specifications, specifying conversion of
|
|
|
862 characters in one charset to another when decoding is performed.
|
|
|
863 Each specification is a list of two elements: the source charset,
|
|
|
864 and the destination charset.
|
|
|
865
|
|
|
866 'output-charset-conversion
|
|
|
867 A list of conversion specifications, specifying conversion of
|
|
|
868 characters in one charset to another when encoding is performed.
|
|
|
869 The form of each specification is the same as for
|
|
|
870 'input-charset-conversion.
|
|
|
871
|
|
|
872
|
|
|
873 The following additional properties are recognized (and required)
|
|
|
874 if TYPE is 'ccl:
|
|
|
875
|
|
|
876 'decode
|
|
|
877 CCL program used for decoding (converting to internal format).
|
|
|
878
|
|
|
879 'encode
|
|
|
880 CCL program used for encoding (converting to external format).
|
|
|
881 */
|
|
|
882 (name, type, doc_string, props))
|
|
|
883 {
|
|
|
884 Lisp_Coding_System *codesys;
|
|
|
885 enum coding_system_type ty;
|
|
|
886 int need_to_setup_eol_systems = 1;
|
|
|
887
|
|
|
888 /* Convert type to constant */
|
|
|
889 if (NILP (type) || EQ (type, Qundecided))
|
|
|
890 { ty = CODESYS_AUTODETECT; }
|
|
|
891 #ifdef MULE
|
|
|
892 else if (EQ (type, Qshift_jis)) { ty = CODESYS_SHIFT_JIS; }
|
|
|
893 else if (EQ (type, Qiso2022)) { ty = CODESYS_ISO2022; }
|
|
|
894 else if (EQ (type, Qbig5)) { ty = CODESYS_BIG5; }
|
|
|
895 else if (EQ (type, Qucs4)) { ty = CODESYS_UCS4; }
|
|
|
896 else if (EQ (type, Qutf8)) { ty = CODESYS_UTF8; }
|
|
|
897 else if (EQ (type, Qccl)) { ty = CODESYS_CCL; }
|
|
|
898 #endif
|
|
|
899 else if (EQ (type, Qno_conversion)) { ty = CODESYS_NO_CONVERSION; }
|
|
|
900 #ifdef DEBUG_XEMACS
|
|
|
901 else if (EQ (type, Qinternal)) { ty = CODESYS_INTERNAL; }
|
|
|
902 #endif
|
|
|
903 else
|
|
|
904 signal_simple_error ("Invalid coding system type", type);
|
|
|
905
|
|
|
906 CHECK_SYMBOL (name);
|
|
|
907
|
|
|
908 codesys = allocate_coding_system (ty, name);
|
|
|
909
|
|
|
910 if (NILP (doc_string))
|
|
|
911 doc_string = build_string ("");
|
|
|
912 else
|
|
|
913 CHECK_STRING (doc_string);
|
|
|
914 CODING_SYSTEM_DOC_STRING (codesys) = doc_string;
|
|
|
915
|
|
442
|
916 {
|
|
|
917 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props)
|
|
|
918 {
|
|
|
919 if (EQ (key, Qmnemonic))
|
|
|
920 {
|
|
|
921 if (!NILP (value))
|
|
|
922 CHECK_STRING (value);
|
|
|
923 CODING_SYSTEM_MNEMONIC (codesys) = value;
|
|
|
924 }
|
|
|
925
|
|
|
926 else if (EQ (key, Qeol_type))
|
|
|
927 {
|
|
|
928 need_to_setup_eol_systems = NILP (value);
|
|
|
929 if (EQ (value, Qt))
|
|
|
930 value = Qnil;
|
|
|
931 CODING_SYSTEM_EOL_TYPE (codesys) = symbol_to_eol_type (value);
|
|
|
932 }
|
|
|
933
|
|
|
934 else if (EQ (key, Qpost_read_conversion)) CODING_SYSTEM_POST_READ_CONVERSION (codesys) = value;
|
|
|
935 else if (EQ (key, Qpre_write_conversion)) CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = value;
|
|
428
|
936 #ifdef MULE
|
|
442
|
937 else if (ty == CODESYS_ISO2022)
|
|
|
938 {
|
|
428
|
939 #define FROB_INITIAL_CHARSET(charset_num) \
|
|
|
940 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, charset_num) = \
|
|
|
941 ((EQ (value, Qt) || EQ (value, Qnil)) ? value : Fget_charset (value))
|
|
|
942
|
|
442
|
943 if (EQ (key, Qcharset_g0)) FROB_INITIAL_CHARSET (0);
|
|
|
944 else if (EQ (key, Qcharset_g1)) FROB_INITIAL_CHARSET (1);
|
|
|
945 else if (EQ (key, Qcharset_g2)) FROB_INITIAL_CHARSET (2);
|
|
|
946 else if (EQ (key, Qcharset_g3)) FROB_INITIAL_CHARSET (3);
|
|
428
|
947
|
|
|
948 #define FROB_FORCE_CHARSET(charset_num) \
|
|
|
949 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (codesys, charset_num) = !NILP (value)
|
|
|
950
|
|
442
|
951 else if (EQ (key, Qforce_g0_on_output)) FROB_FORCE_CHARSET (0);
|
|
|
952 else if (EQ (key, Qforce_g1_on_output)) FROB_FORCE_CHARSET (1);
|
|
|
953 else if (EQ (key, Qforce_g2_on_output)) FROB_FORCE_CHARSET (2);
|
|
|
954 else if (EQ (key, Qforce_g3_on_output)) FROB_FORCE_CHARSET (3);
|
|
428
|
955
|
|
|
956 #define FROB_BOOLEAN_PROPERTY(prop) \
|
|
|
957 CODING_SYSTEM_ISO2022_##prop (codesys) = !NILP (value)
|
|
|
958
|
|
442
|
959 else if (EQ (key, Qshort)) FROB_BOOLEAN_PROPERTY (SHORT);
|
|
|
960 else if (EQ (key, Qno_ascii_eol)) FROB_BOOLEAN_PROPERTY (NO_ASCII_EOL);
|
|
|
961 else if (EQ (key, Qno_ascii_cntl)) FROB_BOOLEAN_PROPERTY (NO_ASCII_CNTL);
|
|
|
962 else if (EQ (key, Qseven)) FROB_BOOLEAN_PROPERTY (SEVEN);
|
|
|
963 else if (EQ (key, Qlock_shift)) FROB_BOOLEAN_PROPERTY (LOCK_SHIFT);
|
|
|
964 else if (EQ (key, Qno_iso6429)) FROB_BOOLEAN_PROPERTY (NO_ISO6429);
|
|
|
965 else if (EQ (key, Qescape_quoted)) FROB_BOOLEAN_PROPERTY (ESCAPE_QUOTED);
|
|
|
966
|
|
|
967 else if (EQ (key, Qinput_charset_conversion))
|
|
|
968 {
|
|
|
969 codesys->iso2022.input_conv =
|
|
|
970 Dynarr_new (charset_conversion_spec);
|
|
|
971 parse_charset_conversion_specs (codesys->iso2022.input_conv,
|
|
|
972 value);
|
|
|
973 }
|
|
|
974 else if (EQ (key, Qoutput_charset_conversion))
|
|
|
975 {
|
|
|
976 codesys->iso2022.output_conv =
|
|
|
977 Dynarr_new (charset_conversion_spec);
|
|
|
978 parse_charset_conversion_specs (codesys->iso2022.output_conv,
|
|
|
979 value);
|
|
|
980 }
|
|
|
981 else
|
|
|
982 signal_simple_error ("Unrecognized property", key);
|
|
|
983 }
|
|
|
984 else if (EQ (type, Qccl))
|
|
|
985 {
|
|
|
986 if (EQ (key, Qdecode))
|
|
|
987 {
|
|
|
988 CHECK_VECTOR (value);
|
|
|
989 CODING_SYSTEM_CCL_DECODE (codesys) = value;
|
|
|
990 }
|
|
|
991 else if (EQ (key, Qencode))
|
|
|
992 {
|
|
|
993 CHECK_VECTOR (value);
|
|
|
994 CODING_SYSTEM_CCL_ENCODE (codesys) = value;
|
|
|
995 }
|
|
|
996 else
|
|
|
997 signal_simple_error ("Unrecognized property", key);
|
|
|
998 }
|
|
428
|
999 #endif /* MULE */
|
|
442
|
1000 else
|
|
|
1001 signal_simple_error ("Unrecognized property", key);
|
|
|
1002 }
|
|
|
1003 }
|
|
428
|
1004
|
|
|
1005 if (need_to_setup_eol_systems)
|
|
|
1006 setup_eol_coding_systems (codesys);
|
|
|
1007
|
|
|
1008 {
|
|
|
1009 Lisp_Object codesys_obj;
|
|
|
1010 XSETCODING_SYSTEM (codesys_obj, codesys);
|
|
|
1011 Fputhash (name, codesys_obj, Vcoding_system_hash_table);
|
|
|
1012 return codesys_obj;
|
|
|
1013 }
|
|
|
1014 }
|
|
|
1015
|
|
|
1016 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
1017 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
1018 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
1019 be created.
|
|
|
1020 */
|
|
|
1021 (old_coding_system, new_name))
|
|
|
1022 {
|
|
|
1023 Lisp_Object new_coding_system;
|
|
|
1024 old_coding_system = Fget_coding_system (old_coding_system);
|
|
|
1025 new_coding_system = Ffind_coding_system (new_name);
|
|
|
1026 if (NILP (new_coding_system))
|
|
|
1027 {
|
|
|
1028 XSETCODING_SYSTEM (new_coding_system,
|
|
|
1029 allocate_coding_system
|
|
|
1030 (XCODING_SYSTEM_TYPE (old_coding_system),
|
|
|
1031 new_name));
|
|
|
1032 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
|
|
1033 }
|
|
|
1034
|
|
|
1035 {
|
|
|
1036 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
1037 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
|
1038 memcpy (((char *) to ) + sizeof (to->header),
|
|
|
1039 ((char *) from) + sizeof (from->header),
|
|
|
1040 sizeof (*from) - sizeof (from->header));
|
|
|
1041 to->name = new_name;
|
|
|
1042 }
|
|
|
1043 return new_coding_system;
|
|
|
1044 }
|
|
|
1045
|
|
440
|
1046 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p, 1, 1, 0, /*
|
|
|
1047 Return t if OBJECT names a coding system, and is not a coding system alias.
|
|
428
|
1048 */
|
|
440
|
1049 (object))
|
|
|
1050 {
|
|
|
1051 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil))
|
|
|
1052 ? Qt : Qnil;
|
|
|
1053 }
|
|
|
1054
|
|
|
1055 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /*
|
|
|
1056 Return t if OBJECT is a coding system alias.
|
|
|
1057 All coding system aliases are created by `define-coding-system-alias'.
|
|
|
1058 */
|
|
|
1059 (object))
|
|
428
|
1060 {
|
|
440
|
1061 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero))
|
|
|
1062 ? Qt : Qnil;
|
|
|
1063 }
|
|
|
1064
|
|
|
1065 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /*
|
|
|
1066 Return the coding-system symbol for which symbol ALIAS is an alias.
|
|
|
1067 */
|
|
|
1068 (alias))
|
|
|
1069 {
|
|
|
1070 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil);
|
|
|
1071 if (SYMBOLP (aliasee))
|
|
|
1072 return aliasee;
|
|
|
1073 else
|
|
|
1074 signal_simple_error ("Symbol is not a coding system alias", alias);
|
|
442
|
1075 return Qnil; /* To keep the compiler happy */
|
|
440
|
1076 }
|
|
|
1077
|
|
|
1078 static Lisp_Object
|
|
|
1079 append_suffix_to_symbol (Lisp_Object symbol, const char *ascii_string)
|
|
|
1080 {
|
|
|
1081 return Fintern (concat2 (Fsymbol_name (symbol), build_string (ascii_string)),
|
|
|
1082 Qnil);
|
|
|
1083 }
|
|
|
1084
|
|
|
1085 /* A maphash function, for removing dangling coding system aliases. */
|
|
|
1086 static int
|
|
|
1087 dangling_coding_system_alias_p (Lisp_Object alias,
|
|
|
1088 Lisp_Object aliasee,
|
|
|
1089 void *dangling_aliases)
|
|
|
1090 {
|
|
|
1091 if (SYMBOLP (aliasee)
|
|
|
1092 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil)))
|
|
428
|
1093 {
|
|
440
|
1094 (*(int *) dangling_aliases)++;
|
|
|
1095 return 1;
|
|
428
|
1096 }
|
|
440
|
1097 else
|
|
|
1098 return 0;
|
|
|
1099 }
|
|
|
1100
|
|
|
1101 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
|
1102 Define symbol ALIAS as an alias for coding system ALIASEE.
|
|
|
1103
|
|
|
1104 You can use this function to redefine an alias that has already been defined,
|
|
|
1105 but you cannot redefine a name which is the canonical name for a coding system.
|
|
|
1106 \(a canonical name of a coding system is what is returned when you call
|
|
|
1107 `coding-system-name' on a coding system).
|
|
|
1108
|
|
|
1109 ALIASEE itself can be an alias, which allows you to define nested aliases.
|
|
|
1110
|
|
|
1111 You are forbidden, however, from creating alias loops or `dangling' aliases.
|
|
|
1112 These will be detected, and an error will be signaled if you attempt to do so.
|
|
|
1113
|
|
|
1114 If ALIASEE is nil, then ALIAS will simply be undefined.
|
|
|
1115
|
|
|
1116 See also `coding-system-alias-p', `coding-system-aliasee',
|
|
|
1117 and `coding-system-canonical-name-p'.
|
|
|
1118 */
|
|
|
1119 (alias, aliasee))
|
|
|
1120 {
|
|
|
1121 Lisp_Object real_coding_system, probe;
|
|
|
1122
|
|
|
1123 CHECK_SYMBOL (alias);
|
|
|
1124
|
|
|
1125 if (!NILP (Fcoding_system_canonical_name_p (alias)))
|
|
|
1126 signal_simple_error
|
|
|
1127 ("Symbol is the canonical name of a coding system and cannot be redefined",
|
|
|
1128 alias);
|
|
|
1129
|
|
|
1130 if (NILP (aliasee))
|
|
|
1131 {
|
|
|
1132 Lisp_Object subsidiary_unix = append_suffix_to_symbol (alias, "-unix");
|
|
|
1133 Lisp_Object subsidiary_dos = append_suffix_to_symbol (alias, "-dos");
|
|
|
1134 Lisp_Object subsidiary_mac = append_suffix_to_symbol (alias, "-mac");
|
|
|
1135
|
|
|
1136 Fremhash (alias, Vcoding_system_hash_table);
|
|
|
1137
|
|
|
1138 /* Undefine subsidiary aliases,
|
|
|
1139 presumably created by a previous call to this function */
|
|
|
1140 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) &&
|
|
|
1141 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) &&
|
|
|
1142 ! NILP (Fcoding_system_alias_p (subsidiary_mac)))
|
|
|
1143 {
|
|
|
1144 Fdefine_coding_system_alias (subsidiary_unix, Qnil);
|
|
|
1145 Fdefine_coding_system_alias (subsidiary_dos, Qnil);
|
|
|
1146 Fdefine_coding_system_alias (subsidiary_mac, Qnil);
|
|
|
1147 }
|
|
|
1148
|
|
|
1149 /* Undefine dangling coding system aliases. */
|
|
|
1150 {
|
|
|
1151 int dangling_aliases;
|
|
|
1152
|
|
|
1153 do {
|
|
|
1154 dangling_aliases = 0;
|
|
|
1155 elisp_map_remhash (dangling_coding_system_alias_p,
|
|
|
1156 Vcoding_system_hash_table,
|
|
|
1157 &dangling_aliases);
|
|
|
1158 } while (dangling_aliases > 0);
|
|
|
1159 }
|
|
|
1160
|
|
|
1161 return Qnil;
|
|
|
1162 }
|
|
|
1163
|
|
|
1164 if (CODING_SYSTEMP (aliasee))
|
|
|
1165 aliasee = XCODING_SYSTEM_NAME (aliasee);
|
|
|
1166
|
|
|
1167 /* Checks that aliasee names a coding-system */
|
|
|
1168 real_coding_system = Fget_coding_system (aliasee);
|
|
|
1169
|
|
|
1170 /* Check for coding system alias loops */
|
|
|
1171 if (EQ (alias, aliasee))
|
|
|
1172 alias_loop: signal_simple_error_2
|
|
|
1173 ("Attempt to create a coding system alias loop", alias, aliasee);
|
|
|
1174
|
|
|
1175 for (probe = aliasee;
|
|
|
1176 SYMBOLP (probe);
|
|
|
1177 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero))
|
|
|
1178 {
|
|
|
1179 if (EQ (probe, alias))
|
|
|
1180 goto alias_loop;
|
|
|
1181 }
|
|
|
1182
|
|
|
1183 Fputhash (alias, aliasee, Vcoding_system_hash_table);
|
|
|
1184
|
|
|
1185 /* Set up aliases for subsidiaries.
|
|
|
1186 #### There must be a better way to handle subsidiary coding systems. */
|
|
|
1187 {
|
|
|
1188 static const char *suffixes[] = { "-unix", "-dos", "-mac" };
|
|
|
1189 int i;
|
|
|
1190 for (i = 0; i < countof (suffixes); i++)
|
|
|
1191 {
|
|
|
1192 Lisp_Object alias_subsidiary =
|
|
|
1193 append_suffix_to_symbol (alias, suffixes[i]);
|
|
|
1194 Lisp_Object aliasee_subsidiary =
|
|
|
1195 append_suffix_to_symbol (aliasee, suffixes[i]);
|
|
|
1196
|
|
|
1197 if (! NILP (Ffind_coding_system (aliasee_subsidiary)))
|
|
|
1198 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary);
|
|
|
1199 }
|
|
|
1200 }
|
|
428
|
1201 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
|
|
|
1202 but it doesn't look intentional, so I'd rather return something
|
|
|
1203 meaningful or nothing at all. */
|
|
|
1204 return Qnil;
|
|
|
1205 }
|
|
|
1206
|
|
|
1207 static Lisp_Object
|
|
438
|
1208 subsidiary_coding_system (Lisp_Object coding_system, eol_type_t type)
|
|
428
|
1209 {
|
|
|
1210 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
1211 Lisp_Object new_coding_system;
|
|
|
1212
|
|
|
1213 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
1214 return coding_system;
|
|
|
1215
|
|
|
1216 switch (type)
|
|
|
1217 {
|
|
|
1218 case EOL_AUTODETECT: return coding_system;
|
|
|
1219 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
1220 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
1221 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
442
|
1222 default: abort (); return Qnil;
|
|
428
|
1223 }
|
|
|
1224
|
|
|
1225 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
1226 }
|
|
|
1227
|
|
|
1228 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
1229 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
|
1230 */
|
|
|
1231 (coding_system, eol_type))
|
|
|
1232 {
|
|
|
1233 coding_system = Fget_coding_system (coding_system);
|
|
|
1234
|
|
|
1235 return subsidiary_coding_system (coding_system,
|
|
|
1236 symbol_to_eol_type (eol_type));
|
|
|
1237 }
|
|
|
1238
|
|
|
1239
|
|
|
1240 /************************************************************************/
|
|
|
1241 /* Coding system accessors */
|
|
|
1242 /************************************************************************/
|
|
|
1243
|
|
|
1244 DEFUN ("coding-system-doc-string", Fcoding_system_doc_string, 1, 1, 0, /*
|
|
|
1245 Return the doc string for CODING-SYSTEM.
|
|
|
1246 */
|
|
|
1247 (coding_system))
|
|
|
1248 {
|
|
|
1249 coding_system = Fget_coding_system (coding_system);
|
|
|
1250 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1251 }
|
|
|
1252
|
|
|
1253 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
1254 Return the type of CODING-SYSTEM.
|
|
|
1255 */
|
|
|
1256 (coding_system))
|
|
|
1257 {
|
|
|
1258 switch (XCODING_SYSTEM_TYPE (Fget_coding_system (coding_system)))
|
|
|
1259 {
|
|
|
1260 default: abort ();
|
|
|
1261 case CODESYS_AUTODETECT: return Qundecided;
|
|
|
1262 #ifdef MULE
|
|
|
1263 case CODESYS_SHIFT_JIS: return Qshift_jis;
|
|
|
1264 case CODESYS_ISO2022: return Qiso2022;
|
|
|
1265 case CODESYS_BIG5: return Qbig5;
|
|
|
1266 case CODESYS_UCS4: return Qucs4;
|
|
|
1267 case CODESYS_UTF8: return Qutf8;
|
|
|
1268 case CODESYS_CCL: return Qccl;
|
|
|
1269 #endif
|
|
|
1270 case CODESYS_NO_CONVERSION: return Qno_conversion;
|
|
|
1271 #ifdef DEBUG_XEMACS
|
|
|
1272 case CODESYS_INTERNAL: return Qinternal;
|
|
|
1273 #endif
|
|
|
1274 }
|
|
|
1275 }
|
|
|
1276
|
|
|
1277 #ifdef MULE
|
|
|
1278 static
|
|
|
1279 Lisp_Object coding_system_charset (Lisp_Object coding_system, int gnum)
|
|
|
1280 {
|
|
|
1281 Lisp_Object cs
|
|
|
1282 = XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, gnum);
|
|
|
1283
|
|
|
1284 return CHARSETP (cs) ? XCHARSET_NAME (cs) : Qnil;
|
|
|
1285 }
|
|
|
1286
|
|
|
1287 DEFUN ("coding-system-charset", Fcoding_system_charset, 2, 2, 0, /*
|
|
|
1288 Return initial charset of CODING-SYSTEM designated to GNUM.
|
|
|
1289 GNUM allows 0 .. 3.
|
|
|
1290 */
|
|
|
1291 (coding_system, gnum))
|
|
|
1292 {
|
|
|
1293 coding_system = Fget_coding_system (coding_system);
|
|
|
1294 CHECK_INT (gnum);
|
|
|
1295
|
|
|
1296 return coding_system_charset (coding_system, XINT (gnum));
|
|
|
1297 }
|
|
|
1298 #endif /* MULE */
|
|
|
1299
|
|
|
1300 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
1301 Return the PROP property of CODING-SYSTEM.
|
|
|
1302 */
|
|
|
1303 (coding_system, prop))
|
|
|
1304 {
|
|
|
1305 int i, ok = 0;
|
|
|
1306 enum coding_system_type type;
|
|
|
1307
|
|
|
1308 coding_system = Fget_coding_system (coding_system);
|
|
|
1309 CHECK_SYMBOL (prop);
|
|
|
1310 type = XCODING_SYSTEM_TYPE (coding_system);
|
|
|
1311
|
|
|
1312 for (i = 0; !ok && i < Dynarr_length (the_codesys_prop_dynarr); i++)
|
|
|
1313 if (EQ (Dynarr_at (the_codesys_prop_dynarr, i).sym, prop))
|
|
|
1314 {
|
|
|
1315 ok = 1;
|
|
|
1316 switch (Dynarr_at (the_codesys_prop_dynarr, i).prop_type)
|
|
|
1317 {
|
|
|
1318 case CODESYS_PROP_ALL_OK:
|
|
|
1319 break;
|
|
|
1320 #ifdef MULE
|
|
|
1321 case CODESYS_PROP_ISO2022:
|
|
|
1322 if (type != CODESYS_ISO2022)
|
|
|
1323 signal_simple_error
|
|
|
1324 ("Property only valid in ISO2022 coding systems",
|
|
|
1325 prop);
|
|
|
1326 break;
|
|
|
1327
|
|
|
1328 case CODESYS_PROP_CCL:
|
|
|
1329 if (type != CODESYS_CCL)
|
|
|
1330 signal_simple_error
|
|
|
1331 ("Property only valid in CCL coding systems",
|
|
|
1332 prop);
|
|
|
1333 break;
|
|
|
1334 #endif /* MULE */
|
|
|
1335 default:
|
|
|
1336 abort ();
|
|
|
1337 }
|
|
|
1338 }
|
|
|
1339
|
|
|
1340 if (!ok)
|
|
|
1341 signal_simple_error ("Unrecognized property", prop);
|
|
|
1342
|
|
|
1343 if (EQ (prop, Qname))
|
|
|
1344 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1345 else if (EQ (prop, Qtype))
|
|
|
1346 return Fcoding_system_type (coding_system);
|
|
|
1347 else if (EQ (prop, Qdoc_string))
|
|
|
1348 return XCODING_SYSTEM_DOC_STRING (coding_system);
|
|
|
1349 else if (EQ (prop, Qmnemonic))
|
|
|
1350 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
|
1351 else if (EQ (prop, Qeol_type))
|
|
|
1352 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE (coding_system));
|
|
|
1353 else if (EQ (prop, Qeol_lf))
|
|
|
1354 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1355 else if (EQ (prop, Qeol_crlf))
|
|
|
1356 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1357 else if (EQ (prop, Qeol_cr))
|
|
|
1358 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1359 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1360 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1361 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1362 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
|
1363 #ifdef MULE
|
|
|
1364 else if (type == CODESYS_ISO2022)
|
|
|
1365 {
|
|
|
1366 if (EQ (prop, Qcharset_g0))
|
|
|
1367 return coding_system_charset (coding_system, 0);
|
|
|
1368 else if (EQ (prop, Qcharset_g1))
|
|
|
1369 return coding_system_charset (coding_system, 1);
|
|
|
1370 else if (EQ (prop, Qcharset_g2))
|
|
|
1371 return coding_system_charset (coding_system, 2);
|
|
|
1372 else if (EQ (prop, Qcharset_g3))
|
|
|
1373 return coding_system_charset (coding_system, 3);
|
|
|
1374
|
|
|
1375 #define FORCE_CHARSET(charset_num) \
|
|
|
1376 (XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT \
|
|
|
1377 (coding_system, charset_num) ? Qt : Qnil)
|
|
|
1378
|
|
|
1379 else if (EQ (prop, Qforce_g0_on_output)) return FORCE_CHARSET (0);
|
|
|
1380 else if (EQ (prop, Qforce_g1_on_output)) return FORCE_CHARSET (1);
|
|
|
1381 else if (EQ (prop, Qforce_g2_on_output)) return FORCE_CHARSET (2);
|
|
|
1382 else if (EQ (prop, Qforce_g3_on_output)) return FORCE_CHARSET (3);
|
|
|
1383
|
|
|
1384 #define LISP_BOOLEAN(prop) \
|
|
|
1385 (XCODING_SYSTEM_ISO2022_##prop (coding_system) ? Qt : Qnil)
|
|
|
1386
|
|
|
1387 else if (EQ (prop, Qshort)) return LISP_BOOLEAN (SHORT);
|
|
|
1388 else if (EQ (prop, Qno_ascii_eol)) return LISP_BOOLEAN (NO_ASCII_EOL);
|
|
|
1389 else if (EQ (prop, Qno_ascii_cntl)) return LISP_BOOLEAN (NO_ASCII_CNTL);
|
|
|
1390 else if (EQ (prop, Qseven)) return LISP_BOOLEAN (SEVEN);
|
|
|
1391 else if (EQ (prop, Qlock_shift)) return LISP_BOOLEAN (LOCK_SHIFT);
|
|
|
1392 else if (EQ (prop, Qno_iso6429)) return LISP_BOOLEAN (NO_ISO6429);
|
|
|
1393 else if (EQ (prop, Qescape_quoted)) return LISP_BOOLEAN (ESCAPE_QUOTED);
|
|
|
1394
|
|
|
1395 else if (EQ (prop, Qinput_charset_conversion))
|
|
|
1396 return
|
|
|
1397 unparse_charset_conversion_specs
|
|
|
1398 (XCODING_SYSTEM (coding_system)->iso2022.input_conv);
|
|
|
1399 else if (EQ (prop, Qoutput_charset_conversion))
|
|
|
1400 return
|
|
|
1401 unparse_charset_conversion_specs
|
|
|
1402 (XCODING_SYSTEM (coding_system)->iso2022.output_conv);
|
|
|
1403 else
|
|
|
1404 abort ();
|
|
|
1405 }
|
|
|
1406 else if (type == CODESYS_CCL)
|
|
|
1407 {
|
|
|
1408 if (EQ (prop, Qdecode))
|
|
|
1409 return XCODING_SYSTEM_CCL_DECODE (coding_system);
|
|
|
1410 else if (EQ (prop, Qencode))
|
|
|
1411 return XCODING_SYSTEM_CCL_ENCODE (coding_system);
|
|
|
1412 else
|
|
|
1413 abort ();
|
|
|
1414 }
|
|
|
1415 #endif /* MULE */
|
|
|
1416 else
|
|
|
1417 abort ();
|
|
|
1418
|
|
|
1419 return Qnil; /* not reached */
|
|
|
1420 }
|
|
|
1421
|
|
|
1422
|
|
|
1423 /************************************************************************/
|
|
|
1424 /* Coding category functions */
|
|
|
1425 /************************************************************************/
|
|
|
1426
|
|
|
1427 static int
|
|
|
1428 decode_coding_category (Lisp_Object symbol)
|
|
|
1429 {
|
|
|
1430 int i;
|
|
|
1431
|
|
|
1432 CHECK_SYMBOL (symbol);
|
|
|
1433 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1434 if (EQ (coding_category_symbol[i], symbol))
|
|
|
1435 return i;
|
|
|
1436
|
|
|
1437 signal_simple_error ("Unrecognized coding category", symbol);
|
|
|
1438 return 0; /* not reached */
|
|
|
1439 }
|
|
|
1440
|
|
|
1441 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
1442 Return a list of all recognized coding categories.
|
|
|
1443 */
|
|
|
1444 ())
|
|
|
1445 {
|
|
|
1446 int i;
|
|
|
1447 Lisp_Object list = Qnil;
|
|
|
1448
|
|
|
1449 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1450 list = Fcons (coding_category_symbol[i], list);
|
|
|
1451 return list;
|
|
|
1452 }
|
|
|
1453
|
|
|
1454 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
1455 Change the priority order of the coding categories.
|
|
|
1456 LIST should be list of coding categories, in descending order of
|
|
|
1457 priority. Unspecified coding categories will be lower in priority
|
|
|
1458 than all specified ones, in the same relative order they were in
|
|
|
1459 previously.
|
|
|
1460 */
|
|
|
1461 (list))
|
|
|
1462 {
|
|
|
1463 int category_to_priority[CODING_CATEGORY_LAST + 1];
|
|
|
1464 int i, j;
|
|
|
1465 Lisp_Object rest;
|
|
|
1466
|
|
|
1467 /* First generate a list that maps coding categories to priorities. */
|
|
|
1468
|
|
|
1469 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1470 category_to_priority[i] = -1;
|
|
|
1471
|
|
|
1472 /* Highest priority comes from the specified list. */
|
|
|
1473 i = 0;
|
|
|
1474 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
1475 {
|
|
|
1476 int cat = decode_coding_category (XCAR (rest));
|
|
|
1477
|
|
|
1478 if (category_to_priority[cat] >= 0)
|
|
|
1479 signal_simple_error ("Duplicate coding category in list", XCAR (rest));
|
|
|
1480 category_to_priority[cat] = i++;
|
|
|
1481 }
|
|
|
1482
|
|
|
1483 /* Now go through the existing categories by priority to retrieve
|
|
|
1484 the categories not yet specified and preserve their priority
|
|
|
1485 order. */
|
|
|
1486 for (j = 0; j <= CODING_CATEGORY_LAST; j++)
|
|
|
1487 {
|
|
|
1488 int cat = fcd->coding_category_by_priority[j];
|
|
|
1489 if (category_to_priority[cat] < 0)
|
|
|
1490 category_to_priority[cat] = i++;
|
|
|
1491 }
|
|
|
1492
|
|
|
1493 /* Now we need to construct the inverse of the mapping we just
|
|
|
1494 constructed. */
|
|
|
1495
|
|
|
1496 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1497 fcd->coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
1498
|
|
|
1499 /* Phew! That was confusing. */
|
|
|
1500 return Qnil;
|
|
|
1501 }
|
|
|
1502
|
|
|
1503 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
1504 Return a list of coding categories in descending order of priority.
|
|
|
1505 */
|
|
|
1506 ())
|
|
|
1507 {
|
|
|
1508 int i;
|
|
|
1509 Lisp_Object list = Qnil;
|
|
|
1510
|
|
|
1511 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1512 list = Fcons (coding_category_symbol[fcd->coding_category_by_priority[i]],
|
|
|
1513 list);
|
|
|
1514 return list;
|
|
|
1515 }
|
|
|
1516
|
|
|
1517 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
1518 Change the coding system associated with a coding category.
|
|
|
1519 */
|
|
|
1520 (coding_category, coding_system))
|
|
|
1521 {
|
|
|
1522 int cat = decode_coding_category (coding_category);
|
|
|
1523
|
|
|
1524 coding_system = Fget_coding_system (coding_system);
|
|
|
1525 fcd->coding_category_system[cat] = coding_system;
|
|
|
1526 return Qnil;
|
|
|
1527 }
|
|
|
1528
|
|
|
1529 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
1530 Return the coding system associated with a coding category.
|
|
|
1531 */
|
|
|
1532 (coding_category))
|
|
|
1533 {
|
|
|
1534 int cat = decode_coding_category (coding_category);
|
|
|
1535 Lisp_Object sys = fcd->coding_category_system[cat];
|
|
|
1536
|
|
|
1537 if (!NILP (sys))
|
|
|
1538 return XCODING_SYSTEM_NAME (sys);
|
|
|
1539 return Qnil;
|
|
|
1540 }
|
|
|
1541
|
|
|
1542
|
|
|
1543 /************************************************************************/
|
|
|
1544 /* Detecting the encoding of data */
|
|
|
1545 /************************************************************************/
|
|
|
1546
|
|
|
1547 struct detection_state
|
|
|
1548 {
|
|
438
|
1549 eol_type_t eol_type;
|
|
428
|
1550 int seen_non_ascii;
|
|
|
1551 int mask;
|
|
|
1552 #ifdef MULE
|
|
|
1553 struct
|
|
|
1554 {
|
|
|
1555 int mask;
|
|
|
1556 int in_second_byte;
|
|
|
1557 }
|
|
|
1558 big5;
|
|
|
1559
|
|
|
1560 struct
|
|
|
1561 {
|
|
|
1562 int mask;
|
|
|
1563 int in_second_byte;
|
|
|
1564 }
|
|
|
1565 shift_jis;
|
|
|
1566
|
|
|
1567 struct
|
|
|
1568 {
|
|
|
1569 int mask;
|
|
|
1570 int in_byte;
|
|
|
1571 }
|
|
|
1572 ucs4;
|
|
|
1573
|
|
|
1574 struct
|
|
|
1575 {
|
|
|
1576 int mask;
|
|
|
1577 int in_byte;
|
|
|
1578 }
|
|
|
1579 utf8;
|
|
|
1580
|
|
|
1581 struct
|
|
|
1582 {
|
|
|
1583 int mask;
|
|
|
1584 int initted;
|
|
|
1585 struct iso2022_decoder iso;
|
|
|
1586 unsigned int flags;
|
|
|
1587 int high_byte_count;
|
|
|
1588 unsigned int saw_single_shift:1;
|
|
|
1589 }
|
|
|
1590 iso2022;
|
|
|
1591 #endif
|
|
|
1592 struct
|
|
|
1593 {
|
|
|
1594 int seen_anything;
|
|
|
1595 int just_saw_cr;
|
|
|
1596 }
|
|
|
1597 eol;
|
|
|
1598 };
|
|
|
1599
|
|
|
1600 static int
|
|
|
1601 acceptable_control_char_p (int c)
|
|
|
1602 {
|
|
|
1603 switch (c)
|
|
|
1604 {
|
|
|
1605 /* Allow and ignore control characters that you might
|
|
|
1606 reasonably see in a text file */
|
|
|
1607 case '\r':
|
|
|
1608 case '\n':
|
|
|
1609 case '\t':
|
|
|
1610 case 7: /* bell */
|
|
|
1611 case 8: /* backspace */
|
|
|
1612 case 11: /* vertical tab */
|
|
|
1613 case 12: /* form feed */
|
|
|
1614 case 26: /* MS-DOS C-z junk */
|
|
|
1615 case 31: /* '^_' -- for info */
|
|
|
1616 return 1;
|
|
|
1617 default:
|
|
|
1618 return 0;
|
|
|
1619 }
|
|
|
1620 }
|
|
|
1621
|
|
|
1622 static int
|
|
|
1623 mask_has_at_most_one_bit_p (int mask)
|
|
|
1624 {
|
|
|
1625 /* Perhaps the only thing useful you learn from intensive Microsoft
|
|
|
1626 technical interviews */
|
|
|
1627 return (mask & (mask - 1)) == 0;
|
|
|
1628 }
|
|
|
1629
|
|
438
|
1630 static eol_type_t
|
|
442
|
1631 detect_eol_type (struct detection_state *st, const unsigned char *src,
|
|
428
|
1632 unsigned int n)
|
|
|
1633 {
|
|
|
1634 int c;
|
|
|
1635
|
|
|
1636 while (n--)
|
|
|
1637 {
|
|
|
1638 c = *src++;
|
|
|
1639 if (c == '\n')
|
|
|
1640 {
|
|
|
1641 if (st->eol.just_saw_cr)
|
|
|
1642 return EOL_CRLF;
|
|
|
1643 else if (st->eol.seen_anything)
|
|
|
1644 return EOL_LF;
|
|
|
1645 }
|
|
|
1646 else if (st->eol.just_saw_cr)
|
|
|
1647 return EOL_CR;
|
|
|
1648 else if (c == '\r')
|
|
|
1649 st->eol.just_saw_cr = 1;
|
|
|
1650 else
|
|
|
1651 st->eol.just_saw_cr = 0;
|
|
|
1652 st->eol.seen_anything = 1;
|
|
|
1653 }
|
|
|
1654
|
|
|
1655 return EOL_AUTODETECT;
|
|
|
1656 }
|
|
|
1657
|
|
|
1658 /* Attempt to determine the encoding and EOL type of the given text.
|
|
|
1659 Before calling this function for the first type, you must initialize
|
|
|
1660 st->eol_type as appropriate and initialize st->mask to ~0.
|
|
|
1661
|
|
|
1662 st->eol_type holds the determined EOL type, or EOL_AUTODETECT if
|
|
|
1663 not yet known.
|
|
|
1664
|
|
|
1665 st->mask holds the determined coding category mask, or ~0 if only
|
|
|
1666 ASCII has been seen so far.
|
|
|
1667
|
|
|
1668 Returns:
|
|
|
1669
|
|
|
1670 0 == st->eol_type is EOL_AUTODETECT and/or more than coding category
|
|
|
1671 is present in st->mask
|
|
|
1672 1 == definitive answers are here for both st->eol_type and st->mask
|
|
|
1673 */
|
|
|
1674
|
|
|
1675 static int
|
|
442
|
1676 detect_coding_type (struct detection_state *st, const Extbyte *src,
|
|
428
|
1677 unsigned int n, int just_do_eol)
|
|
|
1678 {
|
|
|
1679 int c;
|
|
|
1680
|
|
|
1681 if (st->eol_type == EOL_AUTODETECT)
|
|
|
1682 st->eol_type = detect_eol_type (st, src, n);
|
|
|
1683
|
|
|
1684 if (just_do_eol)
|
|
|
1685 return st->eol_type != EOL_AUTODETECT;
|
|
|
1686
|
|
|
1687 if (!st->seen_non_ascii)
|
|
|
1688 {
|
|
|
1689 for (; n; n--, src++)
|
|
|
1690 {
|
|
|
1691 c = *src;
|
|
|
1692 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
1693 {
|
|
|
1694 st->seen_non_ascii = 1;
|
|
|
1695 #ifdef MULE
|
|
|
1696 st->shift_jis.mask = ~0;
|
|
|
1697 st->big5.mask = ~0;
|
|
|
1698 st->ucs4.mask = ~0;
|
|
|
1699 st->utf8.mask = ~0;
|
|
|
1700 st->iso2022.mask = ~0;
|
|
|
1701 #endif
|
|
|
1702 break;
|
|
|
1703 }
|
|
|
1704 }
|
|
|
1705 }
|
|
|
1706
|
|
|
1707 if (!n)
|
|
|
1708 return 0;
|
|
|
1709 #ifdef MULE
|
|
|
1710 if (!mask_has_at_most_one_bit_p (st->iso2022.mask))
|
|
|
1711 st->iso2022.mask = detect_coding_iso2022 (st, src, n);
|
|
|
1712 if (!mask_has_at_most_one_bit_p (st->shift_jis.mask))
|
|
|
1713 st->shift_jis.mask = detect_coding_sjis (st, src, n);
|
|
|
1714 if (!mask_has_at_most_one_bit_p (st->big5.mask))
|
|
|
1715 st->big5.mask = detect_coding_big5 (st, src, n);
|
|
|
1716 if (!mask_has_at_most_one_bit_p (st->utf8.mask))
|
|
|
1717 st->utf8.mask = detect_coding_utf8 (st, src, n);
|
|
|
1718 if (!mask_has_at_most_one_bit_p (st->ucs4.mask))
|
|
|
1719 st->ucs4.mask = detect_coding_ucs4 (st, src, n);
|
|
|
1720
|
|
|
1721 st->mask
|
|
|
1722 = st->iso2022.mask | st->shift_jis.mask | st->big5.mask
|
|
|
1723 | st->utf8.mask | st->ucs4.mask;
|
|
|
1724 #endif
|
|
|
1725 {
|
|
|
1726 int retval = mask_has_at_most_one_bit_p (st->mask);
|
|
|
1727 st->mask |= CODING_CATEGORY_NO_CONVERSION_MASK;
|
|
|
1728 return retval && st->eol_type != EOL_AUTODETECT;
|
|
|
1729 }
|
|
|
1730 }
|
|
|
1731
|
|
|
1732 static Lisp_Object
|
|
|
1733 coding_system_from_mask (int mask)
|
|
|
1734 {
|
|
|
1735 if (mask == ~0)
|
|
|
1736 {
|
|
|
1737 /* If the file was entirely or basically ASCII, use the
|
|
|
1738 default value of `buffer-file-coding-system'. */
|
|
|
1739 Lisp_Object retval =
|
|
|
1740 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
|
1741 if (!NILP (retval))
|
|
|
1742 {
|
|
|
1743 retval = Ffind_coding_system (retval);
|
|
|
1744 if (NILP (retval))
|
|
|
1745 {
|
|
|
1746 warn_when_safe
|
|
|
1747 (Qbad_variable, Qwarning,
|
|
|
1748 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
1749 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
|
1750 }
|
|
|
1751 }
|
|
|
1752 if (NILP (retval))
|
|
|
1753 retval = Fget_coding_system (Qraw_text);
|
|
|
1754 return retval;
|
|
|
1755 }
|
|
|
1756 else
|
|
|
1757 {
|
|
|
1758 int i;
|
|
|
1759 int cat = -1;
|
|
|
1760 #ifdef MULE
|
|
|
1761 mask = postprocess_iso2022_mask (mask);
|
|
|
1762 #endif
|
|
|
1763 /* Look through the coding categories by priority and find
|
|
|
1764 the first one that is allowed. */
|
|
|
1765 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
1766 {
|
|
|
1767 cat = fcd->coding_category_by_priority[i];
|
|
|
1768 if ((mask & (1 << cat)) &&
|
|
|
1769 !NILP (fcd->coding_category_system[cat]))
|
|
|
1770 break;
|
|
|
1771 }
|
|
|
1772 if (cat >= 0)
|
|
|
1773 return fcd->coding_category_system[cat];
|
|
|
1774 else
|
|
|
1775 return Fget_coding_system (Qraw_text);
|
|
|
1776 }
|
|
|
1777 }
|
|
|
1778
|
|
|
1779 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
1780 as specified, do any autodetection that is called for. If the
|
|
|
1781 coding system and/or EOL type are not `autodetect', they will be left
|
|
|
1782 alone; but this function will never return an autodetect coding system
|
|
|
1783 or EOL type.
|
|
|
1784
|
|
|
1785 This function does not automatically fetch subsidiary coding systems;
|
|
|
1786 that should be unnecessary with the explicit eol-type argument. */
|
|
|
1787
|
|
|
1788 #define LENGTH(string_constant) (sizeof (string_constant) - 1)
|
|
|
1789
|
|
|
1790 void
|
|
|
1791 determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
|
|
438
|
1792 eol_type_t *eol_type_in_out)
|
|
428
|
1793 {
|
|
|
1794 struct detection_state decst;
|
|
|
1795
|
|
|
1796 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1797 *eol_type_in_out = XCODING_SYSTEM_EOL_TYPE (*codesys_in_out);
|
|
|
1798
|
|
|
1799 xzero (decst);
|
|
|
1800 decst.eol_type = *eol_type_in_out;
|
|
|
1801 decst.mask = ~0;
|
|
|
1802
|
|
|
1803 /* If autodetection is called for, do it now. */
|
|
|
1804 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
|
|
|
1805 || *eol_type_in_out == EOL_AUTODETECT)
|
|
|
1806 {
|
|
|
1807 Extbyte buf[4096];
|
|
|
1808 Lisp_Object coding_system = Qnil;
|
|
|
1809 Extbyte *p;
|
|
|
1810 ssize_t nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1811 Extbyte *scan_end;
|
|
|
1812
|
|
|
1813 /* Look for initial "-*-"; mode line prefix */
|
|
|
1814 for (p = buf,
|
|
|
1815 scan_end = buf + nread - LENGTH ("-*-coding:?-*-");
|
|
|
1816 p <= scan_end
|
|
|
1817 && *p != '\n'
|
|
|
1818 && *p != '\r';
|
|
|
1819 p++)
|
|
|
1820 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
1821 {
|
|
|
1822 Extbyte *local_vars_beg = p + 3;
|
|
|
1823 /* Look for final "-*-"; mode line suffix */
|
|
|
1824 for (p = local_vars_beg,
|
|
|
1825 scan_end = buf + nread - LENGTH ("-*-");
|
|
|
1826 p <= scan_end
|
|
|
1827 && *p != '\n'
|
|
|
1828 && *p != '\r';
|
|
|
1829 p++)
|
|
|
1830 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
1831 {
|
|
|
1832 Extbyte *suffix = p;
|
|
|
1833 /* Look for "coding:" */
|
|
|
1834 for (p = local_vars_beg,
|
|
|
1835 scan_end = suffix - LENGTH ("coding:?");
|
|
|
1836 p <= scan_end;
|
|
|
1837 p++)
|
|
|
1838 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0
|
|
|
1839 && (p == local_vars_beg
|
|
|
1840 || (*(p-1) == ' ' ||
|
|
|
1841 *(p-1) == '\t' ||
|
|
|
1842 *(p-1) == ';')))
|
|
|
1843 {
|
|
|
1844 Extbyte save;
|
|
|
1845 int n;
|
|
|
1846 p += LENGTH ("coding:");
|
|
|
1847 while (*p == ' ' || *p == '\t') p++;
|
|
|
1848
|
|
|
1849 /* Get coding system name */
|
|
|
1850 save = *suffix; *suffix = '\0';
|
|
|
1851 /* Characters valid in a MIME charset name (rfc 1521),
|
|
|
1852 and in a Lisp symbol name. */
|
|
|
1853 n = strspn ( (char *) p,
|
|
|
1854 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
1855 "abcdefghijklmnopqrstuvwxyz"
|
|
|
1856 "0123456789"
|
|
|
1857 "!$%&*+-.^_{|}~");
|
|
|
1858 *suffix = save;
|
|
|
1859 if (n > 0)
|
|
|
1860 {
|
|
|
1861 save = p[n]; p[n] = '\0';
|
|
|
1862 coding_system =
|
|
|
1863 Ffind_coding_system (intern ((char *) p));
|
|
|
1864 p[n] = save;
|
|
|
1865 }
|
|
|
1866 break;
|
|
|
1867 }
|
|
|
1868 break;
|
|
|
1869 }
|
|
|
1870 break;
|
|
|
1871 }
|
|
|
1872
|
|
|
1873 if (NILP (coding_system))
|
|
|
1874 do
|
|
|
1875 {
|
|
|
1876 if (detect_coding_type (&decst, buf, nread,
|
|
|
1877 XCODING_SYSTEM_TYPE (*codesys_in_out)
|
|
|
1878 != CODESYS_AUTODETECT))
|
|
|
1879 break;
|
|
|
1880 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1881 if (nread == 0)
|
|
|
1882 break;
|
|
|
1883 }
|
|
|
1884 while (1);
|
|
|
1885
|
|
|
1886 else if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT
|
|
|
1887 && XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
|
1888 do
|
|
|
1889 {
|
|
|
1890 if (detect_coding_type (&decst, buf, nread, 1))
|
|
|
1891 break;
|
|
|
1892 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
1893 if (!nread)
|
|
|
1894 break;
|
|
|
1895 }
|
|
|
1896 while (1);
|
|
|
1897
|
|
|
1898 *eol_type_in_out = decst.eol_type;
|
|
|
1899 if (XCODING_SYSTEM_TYPE (*codesys_in_out) == CODESYS_AUTODETECT)
|
|
|
1900 {
|
|
|
1901 if (NILP (coding_system))
|
|
|
1902 *codesys_in_out = coding_system_from_mask (decst.mask);
|
|
|
1903 else
|
|
|
1904 *codesys_in_out = coding_system;
|
|
|
1905 }
|
|
|
1906 }
|
|
|
1907
|
|
|
1908 /* If we absolutely can't determine the EOL type, just assume LF. */
|
|
|
1909 if (*eol_type_in_out == EOL_AUTODETECT)
|
|
|
1910 *eol_type_in_out = EOL_LF;
|
|
|
1911
|
|
|
1912 Lstream_rewind (stream);
|
|
|
1913 }
|
|
|
1914
|
|
|
1915 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
1916 Detect coding system of the text in the region between START and END.
|
|
|
1917 Returned a list of possible coding systems ordered by priority.
|
|
|
1918 If only ASCII characters are found, it returns 'undecided or one of
|
|
|
1919 its subsidiary coding systems according to a detected end-of-line
|
|
|
1920 type. Optional arg BUFFER defaults to the current buffer.
|
|
|
1921 */
|
|
|
1922 (start, end, buffer))
|
|
|
1923 {
|
|
|
1924 Lisp_Object val = Qnil;
|
|
|
1925 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
1926 Bufpos b, e;
|
|
|
1927 Lisp_Object instream, lb_instream;
|
|
|
1928 Lstream *istr, *lb_istr;
|
|
|
1929 struct detection_state decst;
|
|
|
1930 struct gcpro gcpro1, gcpro2;
|
|
|
1931
|
|
|
1932 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
1933 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
1934 lb_istr = XLSTREAM (lb_instream);
|
|
|
1935 instream = make_encoding_input_stream (lb_istr, Fget_coding_system (Qbinary));
|
|
|
1936 istr = XLSTREAM (instream);
|
|
|
1937 GCPRO2 (instream, lb_instream);
|
|
|
1938 xzero (decst);
|
|
|
1939 decst.eol_type = EOL_AUTODETECT;
|
|
|
1940 decst.mask = ~0;
|
|
|
1941 while (1)
|
|
|
1942 {
|
|
|
1943 unsigned char random_buffer[4096];
|
|
|
1944 ssize_t nread = Lstream_read (istr, random_buffer, sizeof (random_buffer));
|
|
|
1945
|
|
|
1946 if (!nread)
|
|
|
1947 break;
|
|
|
1948 if (detect_coding_type (&decst, random_buffer, nread, 0))
|
|
|
1949 break;
|
|
|
1950 }
|
|
|
1951
|
|
|
1952 if (decst.mask == ~0)
|
|
|
1953 val = subsidiary_coding_system (Fget_coding_system (Qundecided),
|
|
|
1954 decst.eol_type);
|
|
|
1955 else
|
|
|
1956 {
|
|
|
1957 int i;
|
|
|
1958
|
|
|
1959 val = Qnil;
|
|
|
1960 #ifdef MULE
|
|
|
1961 decst.mask = postprocess_iso2022_mask (decst.mask);
|
|
|
1962 #endif
|
|
|
1963 for (i = CODING_CATEGORY_LAST; i >= 0; i--)
|
|
|
1964 {
|
|
|
1965 int sys = fcd->coding_category_by_priority[i];
|
|
|
1966 if (decst.mask & (1 << sys))
|
|
|
1967 {
|
|
|
1968 Lisp_Object codesys = fcd->coding_category_system[sys];
|
|
|
1969 if (!NILP (codesys))
|
|
|
1970 codesys = subsidiary_coding_system (codesys, decst.eol_type);
|
|
|
1971 val = Fcons (codesys, val);
|
|
|
1972 }
|
|
|
1973 }
|
|
|
1974 }
|
|
|
1975 Lstream_close (istr);
|
|
|
1976 UNGCPRO;
|
|
|
1977 Lstream_delete (istr);
|
|
|
1978 Lstream_delete (lb_istr);
|
|
|
1979 return val;
|
|
|
1980 }
|
|
|
1981
|
|
|
1982
|
|
|
1983 /************************************************************************/
|
|
|
1984 /* Converting to internal Mule format ("decoding") */
|
|
|
1985 /************************************************************************/
|
|
|
1986
|
|
|
1987 /* A decoding stream is a stream used for decoding text (i.e.
|
|
|
1988 converting from some external format to internal format).
|
|
|
1989 The decoding-stream object keeps track of the actual coding
|
|
|
1990 stream, the stream that is at the other end, and data that
|
|
|
1991 needs to be persistent across the lifetime of the stream. */
|
|
|
1992
|
|
|
1993 /* Handle the EOL stuff related to just-read-in character C.
|
|
|
1994 EOL_TYPE is the EOL type of the coding stream.
|
|
|
1995 FLAGS is the current value of FLAGS in the coding stream, and may
|
|
|
1996 be modified by this macro. (The macro only looks at the
|
|
|
1997 CODING_STATE_CR flag.) DST is the Dynarr to which the decoded
|
|
|
1998 bytes are to be written. You need to also define a local goto
|
|
|
1999 label "label_continue_loop" that is at the end of the main
|
|
|
2000 character-reading loop.
|
|
|
2001
|
|
|
2002 If C is a CR character, then this macro handles it entirely and
|
|
|
2003 jumps to label_continue_loop. Otherwise, this macro does not add
|
|
|
2004 anything to DST, and continues normally. You should continue
|
|
|
2005 processing C normally after this macro. */
|
|
|
2006
|
|
|
2007 #define DECODE_HANDLE_EOL_TYPE(eol_type, c, flags, dst) \
|
|
|
2008 do { \
|
|
|
2009 if (c == '\r') \
|
|
|
2010 { \
|
|
|
2011 if (eol_type == EOL_CR) \
|
|
|
2012 Dynarr_add (dst, '\n'); \
|
|
|
2013 else if (eol_type != EOL_CRLF || flags & CODING_STATE_CR) \
|
|
|
2014 Dynarr_add (dst, c); \
|
|
|
2015 else \
|
|
|
2016 flags |= CODING_STATE_CR; \
|
|
|
2017 goto label_continue_loop; \
|
|
|
2018 } \
|
|
|
2019 else if (flags & CODING_STATE_CR) \
|
|
|
2020 { /* eol_type == CODING_SYSTEM_EOL_CRLF */ \
|
|
|
2021 if (c != '\n') \
|
|
|
2022 Dynarr_add (dst, '\r'); \
|
|
|
2023 flags &= ~CODING_STATE_CR; \
|
|
|
2024 } \
|
|
|
2025 } while (0)
|
|
|
2026
|
|
|
2027 /* C should be a binary character in the range 0 - 255; convert
|
|
|
2028 to internal format and add to Dynarr DST. */
|
|
|
2029
|
|
|
2030 #define DECODE_ADD_BINARY_CHAR(c, dst) \
|
|
|
2031 do { \
|
|
|
2032 if (BYTE_ASCII_P (c)) \
|
|
|
2033 Dynarr_add (dst, c); \
|
|
|
2034 else if (BYTE_C1_P (c)) \
|
|
|
2035 { \
|
|
|
2036 Dynarr_add (dst, LEADING_BYTE_CONTROL_1); \
|
|
|
2037 Dynarr_add (dst, c + 0x20); \
|
|
|
2038 } \
|
|
|
2039 else \
|
|
|
2040 { \
|
|
|
2041 Dynarr_add (dst, LEADING_BYTE_LATIN_ISO8859_1); \
|
|
|
2042 Dynarr_add (dst, c); \
|
|
|
2043 } \
|
|
|
2044 } while (0)
|
|
|
2045
|
|
|
2046 #define DECODE_OUTPUT_PARTIAL_CHAR(ch) \
|
|
|
2047 do { \
|
|
|
2048 if (ch) \
|
|
|
2049 { \
|
|
|
2050 DECODE_ADD_BINARY_CHAR (ch, dst); \
|
|
|
2051 ch = 0; \
|
|
|
2052 } \
|
|
|
2053 } while (0)
|
|
|
2054
|
|
|
2055 #define DECODE_HANDLE_END_OF_CONVERSION(flags, ch, dst) \
|
|
|
2056 do { \
|
|
|
2057 if (flags & CODING_STATE_END) \
|
|
|
2058 { \
|
|
|
2059 DECODE_OUTPUT_PARTIAL_CHAR (ch); \
|
|
|
2060 if (flags & CODING_STATE_CR) \
|
|
|
2061 Dynarr_add (dst, '\r'); \
|
|
|
2062 } \
|
|
|
2063 } while (0)
|
|
|
2064
|
|
|
2065 #define DECODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, decoding)
|
|
|
2066
|
|
|
2067 struct decoding_stream
|
|
|
2068 {
|
|
|
2069 /* Coding system that governs the conversion. */
|
|
|
2070 Lisp_Coding_System *codesys;
|
|
|
2071
|
|
|
2072 /* Stream that we read the encoded data from or
|
|
|
2073 write the decoded data to. */
|
|
|
2074 Lstream *other_end;
|
|
|
2075
|
|
|
2076 /* If we are reading, then we can return only a fixed amount of
|
|
|
2077 data, so if the conversion resulted in too much data, we store it
|
|
|
2078 here for retrieval the next time around. */
|
|
|
2079 unsigned_char_dynarr *runoff;
|
|
|
2080
|
|
|
2081 /* FLAGS holds flags indicating the current state of the decoding.
|
|
|
2082 Some of these flags are dependent on the coding system. */
|
|
|
2083 unsigned int flags;
|
|
|
2084
|
|
|
2085 /* CH holds a partially built-up character. Since we only deal
|
|
|
2086 with one- and two-byte characters at the moment, we only use
|
|
|
2087 this to store the first byte of a two-byte character. */
|
|
|
2088 unsigned int ch;
|
|
|
2089
|
|
|
2090 /* EOL_TYPE specifies the type of end-of-line conversion that
|
|
|
2091 currently applies. We need to keep this separate from the
|
|
|
2092 EOL type stored in CODESYS because the latter might indicate
|
|
|
2093 automatic EOL-type detection while the former will always
|
|
|
2094 indicate a particular EOL type. */
|
|
438
|
2095 eol_type_t eol_type;
|
|
428
|
2096 #ifdef MULE
|
|
|
2097 /* Additional ISO2022 information. We define the structure above
|
|
|
2098 because it's also needed by the detection routines. */
|
|
|
2099 struct iso2022_decoder iso2022;
|
|
|
2100
|
|
|
2101 /* Additional information (the state of the running CCL program)
|
|
|
2102 used by the CCL decoder. */
|
|
|
2103 struct ccl_program ccl;
|
|
|
2104
|
|
|
2105 /* counter for UTF-8 or UCS-4 */
|
|
|
2106 unsigned char counter;
|
|
|
2107 #endif
|
|
|
2108 struct detection_state decst;
|
|
|
2109 };
|
|
|
2110
|
|
|
2111 static ssize_t decoding_reader (Lstream *stream,
|
|
|
2112 unsigned char *data, size_t size);
|
|
|
2113 static ssize_t decoding_writer (Lstream *stream,
|
|
442
|
2114 const unsigned char *data, size_t size);
|
|
428
|
2115 static int decoding_rewinder (Lstream *stream);
|
|
|
2116 static int decoding_seekable_p (Lstream *stream);
|
|
|
2117 static int decoding_flusher (Lstream *stream);
|
|
|
2118 static int decoding_closer (Lstream *stream);
|
|
|
2119
|
|
|
2120 static Lisp_Object decoding_marker (Lisp_Object stream);
|
|
|
2121
|
|
|
2122 DEFINE_LSTREAM_IMPLEMENTATION ("decoding", lstream_decoding,
|
|
|
2123 sizeof (struct decoding_stream));
|
|
|
2124
|
|
|
2125 static Lisp_Object
|
|
|
2126 decoding_marker (Lisp_Object stream)
|
|
|
2127 {
|
|
|
2128 Lstream *str = DECODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2129 Lisp_Object str_obj;
|
|
|
2130
|
|
|
2131 /* We do not need to mark the coding systems or charsets stored
|
|
|
2132 within the stream because they are stored in a global list
|
|
|
2133 and automatically marked. */
|
|
|
2134
|
|
|
2135 XSETLSTREAM (str_obj, str);
|
|
|
2136 mark_object (str_obj);
|
|
|
2137 if (str->imp->marker)
|
|
|
2138 return (str->imp->marker) (str_obj);
|
|
|
2139 else
|
|
|
2140 return Qnil;
|
|
|
2141 }
|
|
|
2142
|
|
|
2143 /* Read SIZE bytes of data and store it into DATA. We are a decoding stream
|
|
|
2144 so we read data from the other end, decode it, and store it into DATA. */
|
|
|
2145
|
|
|
2146 static ssize_t
|
|
|
2147 decoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
|
2148 {
|
|
|
2149 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2150 unsigned char *orig_data = data;
|
|
|
2151 ssize_t read_size;
|
|
|
2152 int error_occurred = 0;
|
|
|
2153
|
|
|
2154 /* We need to interface to mule_decode(), which expects to take some
|
|
|
2155 amount of data and store the result into a Dynarr. We have
|
|
|
2156 mule_decode() store into str->runoff, and take data from there
|
|
|
2157 as necessary. */
|
|
|
2158
|
|
|
2159 /* We loop until we have enough data, reading chunks from the other
|
|
|
2160 end and decoding it. */
|
|
|
2161 while (1)
|
|
|
2162 {
|
|
|
2163 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2164 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2165 if (Dynarr_length (str->runoff) > 0)
|
|
|
2166 {
|
|
|
2167 size_t chunk = min (size, (size_t) Dynarr_length (str->runoff));
|
|
|
2168 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2169 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2170 data += chunk;
|
|
|
2171 size -= chunk;
|
|
|
2172 }
|
|
|
2173
|
|
|
2174 if (size == 0)
|
|
|
2175 break; /* No more room for data */
|
|
|
2176
|
|
|
2177 if (str->flags & CODING_STATE_END)
|
|
|
2178 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2179 the other end. We loop once more so that mule_decode() can
|
|
|
2180 output any final stuff it may be holding, or any "go back
|
|
|
2181 to a sane state" escape sequences. (This latter makes sense
|
|
|
2182 during encoding.) */
|
|
|
2183 break;
|
|
|
2184
|
|
|
2185 /* Exhausted the runoff, so get some more. DATA has at least
|
|
|
2186 SIZE bytes left of storage in it, so it's OK to read directly
|
|
|
2187 into it. (We'll be overwriting above, after we've decoded it
|
|
|
2188 into the runoff.) */
|
|
|
2189 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2190 if (read_size < 0)
|
|
|
2191 {
|
|
|
2192 error_occurred = 1;
|
|
|
2193 break;
|
|
|
2194 }
|
|
|
2195 if (read_size == 0)
|
|
|
2196 /* There might be some more end data produced in the translation.
|
|
|
2197 See the comment above. */
|
|
|
2198 str->flags |= CODING_STATE_END;
|
|
|
2199 mule_decode (stream, data, str->runoff, read_size);
|
|
|
2200 }
|
|
|
2201
|
|
|
2202 if (data - orig_data == 0)
|
|
|
2203 return error_occurred ? -1 : 0;
|
|
|
2204 else
|
|
|
2205 return data - orig_data;
|
|
|
2206 }
|
|
|
2207
|
|
|
2208 static ssize_t
|
|
442
|
2209 decoding_writer (Lstream *stream, const unsigned char *data, size_t size)
|
|
428
|
2210 {
|
|
|
2211 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2212 ssize_t retval;
|
|
|
2213
|
|
|
2214 /* Decode all our data into the runoff, and then attempt to write
|
|
|
2215 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2216 in writing. */
|
|
|
2217 mule_decode (stream, data, str->runoff, size);
|
|
|
2218 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2219 Dynarr_length (str->runoff));
|
|
|
2220 if (retval > 0)
|
|
|
2221 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2222 /* Do NOT return retval. The return value indicates how much
|
|
|
2223 of the incoming data was written, not how many bytes were
|
|
|
2224 written. */
|
|
|
2225 return size;
|
|
|
2226 }
|
|
|
2227
|
|
|
2228 static void
|
|
|
2229 reset_decoding_stream (struct decoding_stream *str)
|
|
|
2230 {
|
|
|
2231 #ifdef MULE
|
|
|
2232 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_ISO2022)
|
|
|
2233 {
|
|
|
2234 Lisp_Object coding_system;
|
|
|
2235 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2236 reset_iso2022 (coding_system, &str->iso2022);
|
|
|
2237 }
|
|
|
2238 else if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_CCL)
|
|
|
2239 {
|
|
|
2240 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_DECODE (str->codesys));
|
|
|
2241 }
|
|
|
2242 str->counter = 0;
|
|
|
2243 #endif /* MULE */
|
|
442
|
2244 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT
|
|
|
2245 || CODING_SYSTEM_EOL_TYPE (str->codesys) == EOL_AUTODETECT)
|
|
|
2246 {
|
|
|
2247 xzero (str->decst);
|
|
|
2248 str->decst.eol_type = EOL_AUTODETECT;
|
|
|
2249 str->decst.mask = ~0;
|
|
|
2250 }
|
|
428
|
2251 str->flags = str->ch = 0;
|
|
|
2252 }
|
|
|
2253
|
|
|
2254 static int
|
|
|
2255 decoding_rewinder (Lstream *stream)
|
|
|
2256 {
|
|
|
2257 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2258 reset_decoding_stream (str);
|
|
|
2259 Dynarr_reset (str->runoff);
|
|
|
2260 return Lstream_rewind (str->other_end);
|
|
|
2261 }
|
|
|
2262
|
|
|
2263 static int
|
|
|
2264 decoding_seekable_p (Lstream *stream)
|
|
|
2265 {
|
|
|
2266 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2267 return Lstream_seekable_p (str->other_end);
|
|
|
2268 }
|
|
|
2269
|
|
|
2270 static int
|
|
|
2271 decoding_flusher (Lstream *stream)
|
|
|
2272 {
|
|
|
2273 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2274 return Lstream_flush (str->other_end);
|
|
|
2275 }
|
|
|
2276
|
|
|
2277 static int
|
|
|
2278 decoding_closer (Lstream *stream)
|
|
|
2279 {
|
|
|
2280 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2281 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2282 {
|
|
|
2283 str->flags |= CODING_STATE_END;
|
|
|
2284 decoding_writer (stream, 0, 0);
|
|
|
2285 }
|
|
|
2286 Dynarr_free (str->runoff);
|
|
|
2287 #ifdef MULE
|
|
|
2288 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
2289 if (str->iso2022.composite_chars)
|
|
|
2290 Dynarr_free (str->iso2022.composite_chars);
|
|
|
2291 #endif
|
|
|
2292 #endif
|
|
|
2293 return Lstream_close (str->other_end);
|
|
|
2294 }
|
|
|
2295
|
|
|
2296 Lisp_Object
|
|
|
2297 decoding_stream_coding_system (Lstream *stream)
|
|
|
2298 {
|
|
|
2299 Lisp_Object coding_system;
|
|
|
2300 struct decoding_stream *str = DECODING_STREAM_DATA (stream);
|
|
|
2301
|
|
|
2302 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2303 return subsidiary_coding_system (coding_system, str->eol_type);
|
|
|
2304 }
|
|
|
2305
|
|
|
2306 void
|
|
|
2307 set_decoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2308 {
|
|
|
2309 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
2310 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2311 str->codesys = cs;
|
|
|
2312 if (CODING_SYSTEM_EOL_TYPE (cs) != EOL_AUTODETECT)
|
|
|
2313 str->eol_type = CODING_SYSTEM_EOL_TYPE (cs);
|
|
|
2314 reset_decoding_stream (str);
|
|
|
2315 }
|
|
|
2316
|
|
|
2317 /* WARNING WARNING WARNING WARNING!!!!! If you open up a decoding
|
|
|
2318 stream for writing, no automatic code detection will be performed.
|
|
|
2319 The reason for this is that automatic code detection requires a
|
|
|
2320 seekable input. Things will also fail if you open a decoding
|
|
|
2321 stream for reading using a non-fully-specified coding system and
|
|
|
2322 a non-seekable input stream. */
|
|
|
2323
|
|
|
2324 static Lisp_Object
|
|
|
2325 make_decoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
442
|
2326 const char *mode)
|
|
428
|
2327 {
|
|
|
2328 Lstream *lstr = Lstream_new (lstream_decoding, mode);
|
|
|
2329 struct decoding_stream *str = DECODING_STREAM_DATA (lstr);
|
|
|
2330 Lisp_Object obj;
|
|
|
2331
|
|
|
2332 xzero (*str);
|
|
|
2333 str->other_end = stream;
|
|
|
2334 str->runoff = (unsigned_char_dynarr *) Dynarr_new (unsigned_char);
|
|
|
2335 str->eol_type = EOL_AUTODETECT;
|
|
|
2336 if (!strcmp (mode, "r")
|
|
|
2337 && Lstream_seekable_p (stream))
|
|
|
2338 /* We can determine the coding system now. */
|
|
|
2339 determine_real_coding_system (stream, &codesys, &str->eol_type);
|
|
|
2340 set_decoding_stream_coding_system (lstr, codesys);
|
|
|
2341 str->decst.eol_type = str->eol_type;
|
|
|
2342 str->decst.mask = ~0;
|
|
|
2343 XSETLSTREAM (obj, lstr);
|
|
|
2344 return obj;
|
|
|
2345 }
|
|
|
2346
|
|
|
2347 Lisp_Object
|
|
|
2348 make_decoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2349 {
|
|
|
2350 return make_decoding_stream_1 (stream, codesys, "r");
|
|
|
2351 }
|
|
|
2352
|
|
|
2353 Lisp_Object
|
|
|
2354 make_decoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2355 {
|
|
|
2356 return make_decoding_stream_1 (stream, codesys, "w");
|
|
|
2357 }
|
|
|
2358
|
|
|
2359 /* Note: the decode_coding_* functions all take the same
|
|
|
2360 arguments as mule_decode(), which is to say some SRC data of
|
|
|
2361 size N, which is to be stored into dynamic array DST.
|
|
|
2362 DECODING is the stream within which the decoding is
|
|
|
2363 taking place, but no data is actually read from or
|
|
|
2364 written to that stream; that is handled in decoding_reader()
|
|
|
2365 or decoding_writer(). This allows the same functions to
|
|
|
2366 be used for both reading and writing. */
|
|
|
2367
|
|
|
2368 static void
|
|
442
|
2369 mule_decode (Lstream *decoding, const unsigned char *src,
|
|
428
|
2370 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2371 {
|
|
|
2372 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2373
|
|
|
2374 /* If necessary, do encoding-detection now. We do this when
|
|
|
2375 we're a writing stream or a non-seekable reading stream,
|
|
|
2376 meaning that we can't just process the whole input,
|
|
|
2377 rewind, and start over. */
|
|
|
2378
|
|
|
2379 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT ||
|
|
|
2380 str->eol_type == EOL_AUTODETECT)
|
|
|
2381 {
|
|
|
2382 Lisp_Object codesys;
|
|
|
2383
|
|
|
2384 XSETCODING_SYSTEM (codesys, str->codesys);
|
|
|
2385 detect_coding_type (&str->decst, src, n,
|
|
|
2386 CODING_SYSTEM_TYPE (str->codesys) !=
|
|
|
2387 CODESYS_AUTODETECT);
|
|
|
2388 if (CODING_SYSTEM_TYPE (str->codesys) == CODESYS_AUTODETECT &&
|
|
|
2389 str->decst.mask != ~0)
|
|
|
2390 /* #### This is cheesy. What we really ought to do is
|
|
|
2391 buffer up a certain amount of data so as to get a
|
|
|
2392 less random result. */
|
|
|
2393 codesys = coding_system_from_mask (str->decst.mask);
|
|
|
2394 str->eol_type = str->decst.eol_type;
|
|
|
2395 if (XCODING_SYSTEM (codesys) != str->codesys)
|
|
|
2396 {
|
|
|
2397 /* Preserve the CODING_STATE_END flag in case it was set.
|
|
|
2398 If we erase it, bad things might happen. */
|
|
|
2399 int was_end = str->flags & CODING_STATE_END;
|
|
|
2400 set_decoding_stream_coding_system (decoding, codesys);
|
|
|
2401 if (was_end)
|
|
|
2402 str->flags |= CODING_STATE_END;
|
|
|
2403 }
|
|
|
2404 }
|
|
|
2405
|
|
|
2406 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2407 {
|
|
|
2408 #ifdef DEBUG_XEMACS
|
|
|
2409 case CODESYS_INTERNAL:
|
|
|
2410 Dynarr_add_many (dst, src, n);
|
|
|
2411 break;
|
|
|
2412 #endif
|
|
|
2413 case CODESYS_AUTODETECT:
|
|
|
2414 /* If we got this far and still haven't decided on the coding
|
|
|
2415 system, then do no conversion. */
|
|
|
2416 case CODESYS_NO_CONVERSION:
|
|
|
2417 decode_coding_no_conversion (decoding, src, dst, n);
|
|
|
2418 break;
|
|
|
2419 #ifdef MULE
|
|
|
2420 case CODESYS_SHIFT_JIS:
|
|
|
2421 decode_coding_sjis (decoding, src, dst, n);
|
|
|
2422 break;
|
|
|
2423 case CODESYS_BIG5:
|
|
|
2424 decode_coding_big5 (decoding, src, dst, n);
|
|
|
2425 break;
|
|
|
2426 case CODESYS_UCS4:
|
|
|
2427 decode_coding_ucs4 (decoding, src, dst, n);
|
|
|
2428 break;
|
|
|
2429 case CODESYS_UTF8:
|
|
|
2430 decode_coding_utf8 (decoding, src, dst, n);
|
|
|
2431 break;
|
|
|
2432 case CODESYS_CCL:
|
|
|
2433 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
|
2434 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_DECODING);
|
|
|
2435 break;
|
|
|
2436 case CODESYS_ISO2022:
|
|
|
2437 decode_coding_iso2022 (decoding, src, dst, n);
|
|
|
2438 break;
|
|
|
2439 #endif /* MULE */
|
|
|
2440 default:
|
|
|
2441 abort ();
|
|
|
2442 }
|
|
|
2443 }
|
|
|
2444
|
|
|
2445 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
2446 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
2447 This is useful if you've read in encoded text from a file without decoding
|
|
|
2448 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
2449 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
|
2450 Return length of decoded text.
|
|
|
2451 BUFFER defaults to the current buffer if unspecified.
|
|
|
2452 */
|
|
|
2453 (start, end, coding_system, buffer))
|
|
|
2454 {
|
|
|
2455 Bufpos b, e;
|
|
|
2456 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2457 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2458 Lstream *istr, *ostr;
|
|
|
2459 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2460
|
|
|
2461 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2462
|
|
|
2463 barf_if_buffer_read_only (buf, b, e);
|
|
|
2464
|
|
|
2465 coding_system = Fget_coding_system (coding_system);
|
|
|
2466 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2467 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2468 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2469 coding_system);
|
|
|
2470 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2471 Fget_coding_system (Qbinary));
|
|
|
2472 istr = XLSTREAM (instream);
|
|
|
2473 ostr = XLSTREAM (outstream);
|
|
|
2474 GCPRO4 (instream, lb_outstream, de_outstream, outstream);
|
|
|
2475
|
|
|
2476 /* The chain of streams looks like this:
|
|
|
2477
|
|
|
2478 [BUFFER] <----- send through
|
|
|
2479 ------> [ENCODE AS BINARY]
|
|
|
2480 ------> [DECODE AS SPECIFIED]
|
|
|
2481 ------> [BUFFER]
|
|
|
2482 */
|
|
|
2483
|
|
|
2484 while (1)
|
|
|
2485 {
|
|
|
2486 char tempbuf[1024]; /* some random amount */
|
|
|
2487 Bufpos newpos, even_newer_pos;
|
|
|
2488 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2489 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2490
|
|
|
2491 if (!size_in_bytes)
|
|
|
2492 break;
|
|
|
2493 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2494 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2495 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2496 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2497 even_newer_pos, 0);
|
|
|
2498 }
|
|
|
2499 Lstream_close (istr);
|
|
|
2500 Lstream_close (ostr);
|
|
|
2501 UNGCPRO;
|
|
|
2502 Lstream_delete (istr);
|
|
|
2503 Lstream_delete (ostr);
|
|
|
2504 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2505 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2506 return Qnil;
|
|
|
2507 }
|
|
|
2508
|
|
|
2509
|
|
|
2510 /************************************************************************/
|
|
|
2511 /* Converting to an external encoding ("encoding") */
|
|
|
2512 /************************************************************************/
|
|
|
2513
|
|
|
2514 /* An encoding stream is an output stream. When you create the
|
|
|
2515 stream, you specify the coding system that governs the encoding
|
|
|
2516 and another stream that the resulting encoded data is to be
|
|
|
2517 sent to, and then start sending data to it. */
|
|
|
2518
|
|
|
2519 #define ENCODING_STREAM_DATA(stream) LSTREAM_TYPE_DATA (stream, encoding)
|
|
|
2520
|
|
|
2521 struct encoding_stream
|
|
|
2522 {
|
|
|
2523 /* Coding system that governs the conversion. */
|
|
|
2524 Lisp_Coding_System *codesys;
|
|
|
2525
|
|
|
2526 /* Stream that we read the encoded data from or
|
|
|
2527 write the decoded data to. */
|
|
|
2528 Lstream *other_end;
|
|
|
2529
|
|
|
2530 /* If we are reading, then we can return only a fixed amount of
|
|
|
2531 data, so if the conversion resulted in too much data, we store it
|
|
|
2532 here for retrieval the next time around. */
|
|
|
2533 unsigned_char_dynarr *runoff;
|
|
|
2534
|
|
|
2535 /* FLAGS holds flags indicating the current state of the encoding.
|
|
|
2536 Some of these flags are dependent on the coding system. */
|
|
|
2537 unsigned int flags;
|
|
|
2538
|
|
|
2539 /* CH holds a partially built-up character. Since we only deal
|
|
|
2540 with one- and two-byte characters at the moment, we only use
|
|
|
2541 this to store the first byte of a two-byte character. */
|
|
|
2542 unsigned int ch;
|
|
|
2543 #ifdef MULE
|
|
|
2544 /* Additional information used by the ISO2022 encoder. */
|
|
|
2545 struct
|
|
|
2546 {
|
|
|
2547 /* CHARSET holds the character sets currently assigned to the G0
|
|
|
2548 through G3 registers. It is initialized from the array
|
|
|
2549 INITIAL_CHARSET in CODESYS. */
|
|
|
2550 Lisp_Object charset[4];
|
|
|
2551
|
|
|
2552 /* Which registers are currently invoked into the left (GL) and
|
|
|
2553 right (GR) halves of the 8-bit encoding space? */
|
|
|
2554 int register_left, register_right;
|
|
|
2555
|
|
|
2556 /* Whether we need to explicitly designate the charset in the
|
|
|
2557 G? register before using it. It is initialized from the
|
|
|
2558 array FORCE_CHARSET_ON_OUTPUT in CODESYS. */
|
|
|
2559 unsigned char force_charset_on_output[4];
|
|
|
2560
|
|
|
2561 /* Other state variables that need to be preserved across
|
|
|
2562 invocations. */
|
|
|
2563 Lisp_Object current_charset;
|
|
|
2564 int current_half;
|
|
|
2565 int current_char_boundary;
|
|
|
2566 } iso2022;
|
|
|
2567
|
|
|
2568 /* Additional information (the state of the running CCL program)
|
|
|
2569 used by the CCL encoder. */
|
|
|
2570 struct ccl_program ccl;
|
|
|
2571 #endif /* MULE */
|
|
|
2572 };
|
|
|
2573
|
|
|
2574 static ssize_t encoding_reader (Lstream *stream, unsigned char *data, size_t size);
|
|
442
|
2575 static ssize_t encoding_writer (Lstream *stream, const unsigned char *data,
|
|
428
|
2576 size_t size);
|
|
|
2577 static int encoding_rewinder (Lstream *stream);
|
|
|
2578 static int encoding_seekable_p (Lstream *stream);
|
|
|
2579 static int encoding_flusher (Lstream *stream);
|
|
|
2580 static int encoding_closer (Lstream *stream);
|
|
|
2581
|
|
|
2582 static Lisp_Object encoding_marker (Lisp_Object stream);
|
|
|
2583
|
|
|
2584 DEFINE_LSTREAM_IMPLEMENTATION ("encoding", lstream_encoding,
|
|
|
2585 sizeof (struct encoding_stream));
|
|
|
2586
|
|
|
2587 static Lisp_Object
|
|
|
2588 encoding_marker (Lisp_Object stream)
|
|
|
2589 {
|
|
|
2590 Lstream *str = ENCODING_STREAM_DATA (XLSTREAM (stream))->other_end;
|
|
|
2591 Lisp_Object str_obj;
|
|
|
2592
|
|
|
2593 /* We do not need to mark the coding systems or charsets stored
|
|
|
2594 within the stream because they are stored in a global list
|
|
|
2595 and automatically marked. */
|
|
|
2596
|
|
|
2597 XSETLSTREAM (str_obj, str);
|
|
|
2598 mark_object (str_obj);
|
|
|
2599 if (str->imp->marker)
|
|
|
2600 return (str->imp->marker) (str_obj);
|
|
|
2601 else
|
|
|
2602 return Qnil;
|
|
|
2603 }
|
|
|
2604
|
|
|
2605 /* Read SIZE bytes of data and store it into DATA. We are a encoding stream
|
|
|
2606 so we read data from the other end, encode it, and store it into DATA. */
|
|
|
2607
|
|
|
2608 static ssize_t
|
|
|
2609 encoding_reader (Lstream *stream, unsigned char *data, size_t size)
|
|
|
2610 {
|
|
|
2611 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2612 unsigned char *orig_data = data;
|
|
|
2613 ssize_t read_size;
|
|
|
2614 int error_occurred = 0;
|
|
|
2615
|
|
|
2616 /* We need to interface to mule_encode(), which expects to take some
|
|
|
2617 amount of data and store the result into a Dynarr. We have
|
|
|
2618 mule_encode() store into str->runoff, and take data from there
|
|
|
2619 as necessary. */
|
|
|
2620
|
|
|
2621 /* We loop until we have enough data, reading chunks from the other
|
|
|
2622 end and encoding it. */
|
|
|
2623 while (1)
|
|
|
2624 {
|
|
|
2625 /* Take data from the runoff if we can. Make sure to take at
|
|
|
2626 most SIZE bytes, and delete the data from the runoff. */
|
|
|
2627 if (Dynarr_length (str->runoff) > 0)
|
|
|
2628 {
|
|
|
2629 int chunk = min ((int) size, Dynarr_length (str->runoff));
|
|
|
2630 memcpy (data, Dynarr_atp (str->runoff, 0), chunk);
|
|
|
2631 Dynarr_delete_many (str->runoff, 0, chunk);
|
|
|
2632 data += chunk;
|
|
|
2633 size -= chunk;
|
|
|
2634 }
|
|
|
2635
|
|
|
2636 if (size == 0)
|
|
|
2637 break; /* No more room for data */
|
|
|
2638
|
|
|
2639 if (str->flags & CODING_STATE_END)
|
|
|
2640 /* This means that on the previous iteration, we hit the EOF on
|
|
|
2641 the other end. We loop once more so that mule_encode() can
|
|
|
2642 output any final stuff it may be holding, or any "go back
|
|
|
2643 to a sane state" escape sequences. (This latter makes sense
|
|
|
2644 during encoding.) */
|
|
|
2645 break;
|
|
|
2646
|
|
|
2647 /* Exhausted the runoff, so get some more. DATA at least SIZE bytes
|
|
|
2648 left of storage in it, so it's OK to read directly into it.
|
|
|
2649 (We'll be overwriting above, after we've encoded it into the
|
|
|
2650 runoff.) */
|
|
|
2651 read_size = Lstream_read (str->other_end, data, size);
|
|
|
2652 if (read_size < 0)
|
|
|
2653 {
|
|
|
2654 error_occurred = 1;
|
|
|
2655 break;
|
|
|
2656 }
|
|
|
2657 if (read_size == 0)
|
|
|
2658 /* There might be some more end data produced in the translation.
|
|
|
2659 See the comment above. */
|
|
|
2660 str->flags |= CODING_STATE_END;
|
|
|
2661 mule_encode (stream, data, str->runoff, read_size);
|
|
|
2662 }
|
|
|
2663
|
|
|
2664 if (data == orig_data)
|
|
|
2665 return error_occurred ? -1 : 0;
|
|
|
2666 else
|
|
|
2667 return data - orig_data;
|
|
|
2668 }
|
|
|
2669
|
|
|
2670 static ssize_t
|
|
442
|
2671 encoding_writer (Lstream *stream, const unsigned char *data, size_t size)
|
|
428
|
2672 {
|
|
|
2673 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2674 ssize_t retval;
|
|
|
2675
|
|
|
2676 /* Encode all our data into the runoff, and then attempt to write
|
|
|
2677 it all out to the other end. Remove whatever chunk we succeeded
|
|
|
2678 in writing. */
|
|
|
2679 mule_encode (stream, data, str->runoff, size);
|
|
|
2680 retval = Lstream_write (str->other_end, Dynarr_atp (str->runoff, 0),
|
|
|
2681 Dynarr_length (str->runoff));
|
|
|
2682 if (retval > 0)
|
|
|
2683 Dynarr_delete_many (str->runoff, 0, retval);
|
|
|
2684 /* Do NOT return retval. The return value indicates how much
|
|
|
2685 of the incoming data was written, not how many bytes were
|
|
|
2686 written. */
|
|
|
2687 return size;
|
|
|
2688 }
|
|
|
2689
|
|
|
2690 static void
|
|
|
2691 reset_encoding_stream (struct encoding_stream *str)
|
|
|
2692 {
|
|
|
2693 #ifdef MULE
|
|
|
2694 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2695 {
|
|
|
2696 case CODESYS_ISO2022:
|
|
|
2697 {
|
|
|
2698 int i;
|
|
|
2699
|
|
|
2700 for (i = 0; i < 4; i++)
|
|
|
2701 {
|
|
|
2702 str->iso2022.charset[i] =
|
|
|
2703 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (str->codesys, i);
|
|
|
2704 str->iso2022.force_charset_on_output[i] =
|
|
|
2705 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (str->codesys, i);
|
|
|
2706 }
|
|
|
2707 str->iso2022.register_left = 0;
|
|
|
2708 str->iso2022.register_right = 1;
|
|
|
2709 str->iso2022.current_charset = Qnil;
|
|
|
2710 str->iso2022.current_half = 0;
|
|
|
2711 str->iso2022.current_char_boundary = 1;
|
|
|
2712 break;
|
|
|
2713 }
|
|
|
2714 case CODESYS_CCL:
|
|
|
2715 setup_ccl_program (&str->ccl, CODING_SYSTEM_CCL_ENCODE (str->codesys));
|
|
|
2716 break;
|
|
|
2717 default:
|
|
|
2718 break;
|
|
|
2719 }
|
|
|
2720 #endif /* MULE */
|
|
|
2721
|
|
|
2722 str->flags = str->ch = 0;
|
|
|
2723 }
|
|
|
2724
|
|
|
2725 static int
|
|
|
2726 encoding_rewinder (Lstream *stream)
|
|
|
2727 {
|
|
|
2728 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2729 reset_encoding_stream (str);
|
|
|
2730 Dynarr_reset (str->runoff);
|
|
|
2731 return Lstream_rewind (str->other_end);
|
|
|
2732 }
|
|
|
2733
|
|
|
2734 static int
|
|
|
2735 encoding_seekable_p (Lstream *stream)
|
|
|
2736 {
|
|
|
2737 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2738 return Lstream_seekable_p (str->other_end);
|
|
|
2739 }
|
|
|
2740
|
|
|
2741 static int
|
|
|
2742 encoding_flusher (Lstream *stream)
|
|
|
2743 {
|
|
|
2744 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2745 return Lstream_flush (str->other_end);
|
|
|
2746 }
|
|
|
2747
|
|
|
2748 static int
|
|
|
2749 encoding_closer (Lstream *stream)
|
|
|
2750 {
|
|
|
2751 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2752 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2753 {
|
|
|
2754 str->flags |= CODING_STATE_END;
|
|
|
2755 encoding_writer (stream, 0, 0);
|
|
|
2756 }
|
|
|
2757 Dynarr_free (str->runoff);
|
|
|
2758 return Lstream_close (str->other_end);
|
|
|
2759 }
|
|
|
2760
|
|
|
2761 Lisp_Object
|
|
|
2762 encoding_stream_coding_system (Lstream *stream)
|
|
|
2763 {
|
|
|
2764 Lisp_Object coding_system;
|
|
|
2765 struct encoding_stream *str = ENCODING_STREAM_DATA (stream);
|
|
|
2766
|
|
|
2767 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
2768 return coding_system;
|
|
|
2769 }
|
|
|
2770
|
|
|
2771 void
|
|
|
2772 set_encoding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2773 {
|
|
|
2774 Lisp_Coding_System *cs = XCODING_SYSTEM (codesys);
|
|
|
2775 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2776 str->codesys = cs;
|
|
|
2777 reset_encoding_stream (str);
|
|
|
2778 }
|
|
|
2779
|
|
|
2780 static Lisp_Object
|
|
|
2781 make_encoding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
442
|
2782 const char *mode)
|
|
428
|
2783 {
|
|
|
2784 Lstream *lstr = Lstream_new (lstream_encoding, mode);
|
|
|
2785 struct encoding_stream *str = ENCODING_STREAM_DATA (lstr);
|
|
|
2786 Lisp_Object obj;
|
|
|
2787
|
|
|
2788 xzero (*str);
|
|
|
2789 str->runoff = Dynarr_new (unsigned_char);
|
|
|
2790 str->other_end = stream;
|
|
|
2791 set_encoding_stream_coding_system (lstr, codesys);
|
|
|
2792 XSETLSTREAM (obj, lstr);
|
|
|
2793 return obj;
|
|
|
2794 }
|
|
|
2795
|
|
|
2796 Lisp_Object
|
|
|
2797 make_encoding_input_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2798 {
|
|
|
2799 return make_encoding_stream_1 (stream, codesys, "r");
|
|
|
2800 }
|
|
|
2801
|
|
|
2802 Lisp_Object
|
|
|
2803 make_encoding_output_stream (Lstream *stream, Lisp_Object codesys)
|
|
|
2804 {
|
|
|
2805 return make_encoding_stream_1 (stream, codesys, "w");
|
|
|
2806 }
|
|
|
2807
|
|
|
2808 /* Convert N bytes of internally-formatted data stored in SRC to an
|
|
|
2809 external format, according to the encoding stream ENCODING.
|
|
|
2810 Store the encoded data into DST. */
|
|
|
2811
|
|
|
2812 static void
|
|
442
|
2813 mule_encode (Lstream *encoding, const unsigned char *src,
|
|
428
|
2814 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2815 {
|
|
|
2816 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
2817
|
|
|
2818 switch (CODING_SYSTEM_TYPE (str->codesys))
|
|
|
2819 {
|
|
|
2820 #ifdef DEBUG_XEMACS
|
|
|
2821 case CODESYS_INTERNAL:
|
|
|
2822 Dynarr_add_many (dst, src, n);
|
|
|
2823 break;
|
|
|
2824 #endif
|
|
|
2825 case CODESYS_AUTODETECT:
|
|
|
2826 /* If we got this far and still haven't decided on the coding
|
|
|
2827 system, then do no conversion. */
|
|
|
2828 case CODESYS_NO_CONVERSION:
|
|
|
2829 encode_coding_no_conversion (encoding, src, dst, n);
|
|
|
2830 break;
|
|
|
2831 #ifdef MULE
|
|
|
2832 case CODESYS_SHIFT_JIS:
|
|
|
2833 encode_coding_sjis (encoding, src, dst, n);
|
|
|
2834 break;
|
|
|
2835 case CODESYS_BIG5:
|
|
|
2836 encode_coding_big5 (encoding, src, dst, n);
|
|
|
2837 break;
|
|
|
2838 case CODESYS_UCS4:
|
|
|
2839 encode_coding_ucs4 (encoding, src, dst, n);
|
|
|
2840 break;
|
|
|
2841 case CODESYS_UTF8:
|
|
|
2842 encode_coding_utf8 (encoding, src, dst, n);
|
|
|
2843 break;
|
|
|
2844 case CODESYS_CCL:
|
|
|
2845 str->ccl.last_block = str->flags & CODING_STATE_END;
|
|
|
2846 ccl_driver (&str->ccl, src, dst, n, 0, CCL_MODE_ENCODING);
|
|
|
2847 break;
|
|
|
2848 case CODESYS_ISO2022:
|
|
|
2849 encode_coding_iso2022 (encoding, src, dst, n);
|
|
|
2850 break;
|
|
|
2851 #endif /* MULE */
|
|
|
2852 default:
|
|
|
2853 abort ();
|
|
|
2854 }
|
|
|
2855 }
|
|
|
2856
|
|
|
2857 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2858 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2859 This will, for example, convert Japanese characters into stuff such as
|
|
|
2860 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
|
2861 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2862 */
|
|
|
2863 (start, end, coding_system, buffer))
|
|
|
2864 {
|
|
|
2865 Bufpos b, e;
|
|
|
2866 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2867 Lisp_Object instream, lb_outstream, de_outstream, outstream;
|
|
|
2868 Lstream *istr, *ostr;
|
|
|
2869 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2870
|
|
|
2871 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2872
|
|
|
2873 barf_if_buffer_read_only (buf, b, e);
|
|
|
2874
|
|
|
2875 coding_system = Fget_coding_system (coding_system);
|
|
|
2876 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2877 lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2878 de_outstream = make_decoding_output_stream (XLSTREAM (lb_outstream),
|
|
|
2879 Fget_coding_system (Qbinary));
|
|
|
2880 outstream = make_encoding_output_stream (XLSTREAM (de_outstream),
|
|
|
2881 coding_system);
|
|
|
2882 istr = XLSTREAM (instream);
|
|
|
2883 ostr = XLSTREAM (outstream);
|
|
|
2884 GCPRO4 (instream, outstream, de_outstream, lb_outstream);
|
|
|
2885 /* The chain of streams looks like this:
|
|
|
2886
|
|
|
2887 [BUFFER] <----- send through
|
|
|
2888 ------> [ENCODE AS SPECIFIED]
|
|
|
2889 ------> [DECODE AS BINARY]
|
|
|
2890 ------> [BUFFER]
|
|
|
2891 */
|
|
|
2892 while (1)
|
|
|
2893 {
|
|
|
2894 char tempbuf[1024]; /* some random amount */
|
|
|
2895 Bufpos newpos, even_newer_pos;
|
|
|
2896 Bufpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2897 ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2898
|
|
|
2899 if (!size_in_bytes)
|
|
|
2900 break;
|
|
|
2901 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2902 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2903 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2904 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2905 even_newer_pos, 0);
|
|
|
2906 }
|
|
|
2907
|
|
|
2908 {
|
|
|
2909 Charcount retlen =
|
|
|
2910 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2911 Lstream_close (istr);
|
|
|
2912 Lstream_close (ostr);
|
|
|
2913 UNGCPRO;
|
|
|
2914 Lstream_delete (istr);
|
|
|
2915 Lstream_delete (ostr);
|
|
|
2916 Lstream_delete (XLSTREAM (de_outstream));
|
|
|
2917 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2918 return make_int (retlen);
|
|
|
2919 }
|
|
|
2920 }
|
|
|
2921
|
|
|
2922 #ifdef MULE
|
|
|
2923
|
|
|
2924 /************************************************************************/
|
|
|
2925 /* Shift-JIS methods */
|
|
|
2926 /************************************************************************/
|
|
|
2927
|
|
|
2928 /* Shift-JIS is a coding system encoding three character sets: ASCII, right
|
|
|
2929 half of JISX0201-Kana, and JISX0208. An ASCII character is encoded
|
|
|
2930 as is. A character of JISX0201-Kana (DIMENSION1_CHARS94 character set) is
|
|
|
2931 encoded by "position-code + 0x80". A character of JISX0208
|
|
|
2932 (DIMENSION2_CHARS94 character set) is encoded in 2-byte but two
|
|
|
2933 position-codes are divided and shifted so that it fit in the range
|
|
|
2934 below.
|
|
|
2935
|
|
|
2936 --- CODE RANGE of Shift-JIS ---
|
|
|
2937 (character set) (range)
|
|
|
2938 ASCII 0x00 .. 0x7F
|
|
|
2939 JISX0201-Kana 0xA0 .. 0xDF
|
|
|
2940 JISX0208 (1st byte) 0x80 .. 0x9F and 0xE0 .. 0xEF
|
|
|
2941 (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC
|
|
|
2942 -------------------------------
|
|
|
2943
|
|
|
2944 */
|
|
|
2945
|
|
|
2946 /* Is this the first byte of a Shift-JIS two-byte char? */
|
|
|
2947
|
|
|
2948 #define BYTE_SJIS_TWO_BYTE_1_P(c) \
|
|
|
2949 (((c) >= 0x81 && (c) <= 0x9F) || ((c) >= 0xE0 && (c) <= 0xEF))
|
|
|
2950
|
|
|
2951 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
2952
|
|
|
2953 #define BYTE_SJIS_TWO_BYTE_2_P(c) \
|
|
|
2954 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0x80 && (c) <= 0xFC))
|
|
|
2955
|
|
|
2956 #define BYTE_SJIS_KATAKANA_P(c) \
|
|
|
2957 ((c) >= 0xA1 && (c) <= 0xDF)
|
|
|
2958
|
|
|
2959 static int
|
|
442
|
2960 detect_coding_sjis (struct detection_state *st, const unsigned char *src,
|
|
428
|
2961 unsigned int n)
|
|
|
2962 {
|
|
|
2963 int c;
|
|
|
2964
|
|
|
2965 while (n--)
|
|
|
2966 {
|
|
|
2967 c = *src++;
|
|
|
2968 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
2969 return 0;
|
|
|
2970 if (st->shift_jis.in_second_byte)
|
|
|
2971 {
|
|
|
2972 st->shift_jis.in_second_byte = 0;
|
|
|
2973 if (c < 0x40)
|
|
|
2974 return 0;
|
|
|
2975 }
|
|
|
2976 else if ((c >= 0x80 && c < 0xA0) || c >= 0xE0)
|
|
|
2977 st->shift_jis.in_second_byte = 1;
|
|
|
2978 }
|
|
|
2979 return CODING_CATEGORY_SHIFT_JIS_MASK;
|
|
|
2980 }
|
|
|
2981
|
|
|
2982 /* Convert Shift-JIS data to internal format. */
|
|
|
2983
|
|
|
2984 static void
|
|
442
|
2985 decode_coding_sjis (Lstream *decoding, const unsigned char *src,
|
|
428
|
2986 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
2987 {
|
|
|
2988 unsigned char c;
|
|
|
2989 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
2990 unsigned int flags = str->flags;
|
|
|
2991 unsigned int ch = str->ch;
|
|
|
2992 eol_type_t eol_type = str->eol_type;
|
|
|
2993
|
|
|
2994 while (n--)
|
|
|
2995 {
|
|
|
2996 c = *src++;
|
|
|
2997
|
|
|
2998 if (ch)
|
|
|
2999 {
|
|
|
3000 /* Previous character was first byte of Shift-JIS Kanji char. */
|
|
|
3001 if (BYTE_SJIS_TWO_BYTE_2_P (c))
|
|
|
3002 {
|
|
|
3003 unsigned char e1, e2;
|
|
|
3004
|
|
|
3005 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
3006 DECODE_SJIS (ch, c, e1, e2);
|
|
|
3007 Dynarr_add (dst, e1);
|
|
|
3008 Dynarr_add (dst, e2);
|
|
|
3009 }
|
|
|
3010 else
|
|
|
3011 {
|
|
|
3012 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
3013 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3014 }
|
|
|
3015 ch = 0;
|
|
|
3016 }
|
|
|
3017 else
|
|
|
3018 {
|
|
|
3019 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3020 if (BYTE_SJIS_TWO_BYTE_1_P (c))
|
|
|
3021 ch = c;
|
|
|
3022 else if (BYTE_SJIS_KATAKANA_P (c))
|
|
|
3023 {
|
|
|
3024 Dynarr_add (dst, LEADING_BYTE_KATAKANA_JISX0201);
|
|
|
3025 Dynarr_add (dst, c);
|
|
|
3026 }
|
|
|
3027 else
|
|
|
3028 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3029 }
|
|
|
3030 label_continue_loop:;
|
|
|
3031 }
|
|
|
3032
|
|
|
3033 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
3034
|
|
|
3035 str->flags = flags;
|
|
|
3036 str->ch = ch;
|
|
|
3037 }
|
|
|
3038
|
|
|
3039 /* Convert internally-formatted data to Shift-JIS. */
|
|
|
3040
|
|
|
3041 static void
|
|
442
|
3042 encode_coding_sjis (Lstream *encoding, const unsigned char *src,
|
|
428
|
3043 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3044 {
|
|
|
3045 unsigned char c;
|
|
|
3046 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3047 unsigned int flags = str->flags;
|
|
|
3048 unsigned int ch = str->ch;
|
|
|
3049 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3050
|
|
|
3051 while (n--)
|
|
|
3052 {
|
|
|
3053 c = *src++;
|
|
|
3054 if (c == '\n')
|
|
|
3055 {
|
|
|
3056 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3057 Dynarr_add (dst, '\r');
|
|
|
3058 if (eol_type != EOL_CR)
|
|
|
3059 Dynarr_add (dst, '\n');
|
|
|
3060 ch = 0;
|
|
|
3061 }
|
|
|
3062 else if (BYTE_ASCII_P (c))
|
|
|
3063 {
|
|
|
3064 Dynarr_add (dst, c);
|
|
|
3065 ch = 0;
|
|
|
3066 }
|
|
|
3067 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
3068 ch = (c == LEADING_BYTE_KATAKANA_JISX0201 ||
|
|
|
3069 c == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
3070 c == LEADING_BYTE_JAPANESE_JISX0208) ? c : 0;
|
|
|
3071 else if (ch)
|
|
|
3072 {
|
|
|
3073 if (ch == LEADING_BYTE_KATAKANA_JISX0201)
|
|
|
3074 {
|
|
|
3075 Dynarr_add (dst, c);
|
|
|
3076 ch = 0;
|
|
|
3077 }
|
|
|
3078 else if (ch == LEADING_BYTE_JAPANESE_JISX0208_1978 ||
|
|
|
3079 ch == LEADING_BYTE_JAPANESE_JISX0208)
|
|
|
3080 ch = c;
|
|
|
3081 else
|
|
|
3082 {
|
|
|
3083 unsigned char j1, j2;
|
|
|
3084 ENCODE_SJIS (ch, c, j1, j2);
|
|
|
3085 Dynarr_add (dst, j1);
|
|
|
3086 Dynarr_add (dst, j2);
|
|
|
3087 ch = 0;
|
|
|
3088 }
|
|
|
3089 }
|
|
|
3090 }
|
|
|
3091
|
|
|
3092 str->flags = flags;
|
|
|
3093 str->ch = ch;
|
|
|
3094 }
|
|
|
3095
|
|
|
3096 DEFUN ("decode-shift-jis-char", Fdecode_shift_jis_char, 1, 1, 0, /*
|
|
|
3097 Decode a JISX0208 character of Shift-JIS coding-system.
|
|
|
3098 CODE is the character code in Shift-JIS as a cons of type bytes.
|
|
|
3099 Return the corresponding character.
|
|
|
3100 */
|
|
|
3101 (code))
|
|
|
3102 {
|
|
|
3103 unsigned char c1, c2, s1, s2;
|
|
|
3104
|
|
|
3105 CHECK_CONS (code);
|
|
|
3106 CHECK_INT (XCAR (code));
|
|
|
3107 CHECK_INT (XCDR (code));
|
|
|
3108 s1 = XINT (XCAR (code));
|
|
|
3109 s2 = XINT (XCDR (code));
|
|
|
3110 if (BYTE_SJIS_TWO_BYTE_1_P (s1) &&
|
|
|
3111 BYTE_SJIS_TWO_BYTE_2_P (s2))
|
|
|
3112 {
|
|
|
3113 DECODE_SJIS (s1, s2, c1, c2);
|
|
|
3114 return make_char (MAKE_CHAR (Vcharset_japanese_jisx0208,
|
|
|
3115 c1 & 0x7F, c2 & 0x7F));
|
|
|
3116 }
|
|
|
3117 else
|
|
|
3118 return Qnil;
|
|
|
3119 }
|
|
|
3120
|
|
|
3121 DEFUN ("encode-shift-jis-char", Fencode_shift_jis_char, 1, 1, 0, /*
|
|
|
3122 Encode a JISX0208 character CHAR to SHIFT-JIS coding-system.
|
|
|
3123 Return the corresponding character code in SHIFT-JIS as a cons of two bytes.
|
|
|
3124 */
|
|
|
3125 (ch))
|
|
|
3126 {
|
|
|
3127 Lisp_Object charset;
|
|
|
3128 int c1, c2, s1, s2;
|
|
|
3129
|
|
|
3130 CHECK_CHAR_COERCE_INT (ch);
|
|
|
3131 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
3132 if (EQ (charset, Vcharset_japanese_jisx0208))
|
|
|
3133 {
|
|
|
3134 ENCODE_SJIS (c1 | 0x80, c2 | 0x80, s1, s2);
|
|
|
3135 return Fcons (make_int (s1), make_int (s2));
|
|
|
3136 }
|
|
|
3137 else
|
|
|
3138 return Qnil;
|
|
|
3139 }
|
|
|
3140
|
|
|
3141
|
|
|
3142 /************************************************************************/
|
|
|
3143 /* Big5 methods */
|
|
|
3144 /************************************************************************/
|
|
|
3145
|
|
|
3146 /* BIG5 is a coding system encoding two character sets: ASCII and
|
|
|
3147 Big5. An ASCII character is encoded as is. Big5 is a two-byte
|
|
|
3148 character set and is encoded in two-byte.
|
|
|
3149
|
|
|
3150 --- CODE RANGE of BIG5 ---
|
|
|
3151 (character set) (range)
|
|
|
3152 ASCII 0x00 .. 0x7F
|
|
|
3153 Big5 (1st byte) 0xA1 .. 0xFE
|
|
|
3154 (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE
|
|
|
3155 --------------------------
|
|
|
3156
|
|
|
3157 Since the number of characters in Big5 is larger than maximum
|
|
|
3158 characters in Emacs' charset (96x96), it can't be handled as one
|
|
|
3159 charset. So, in Emacs, Big5 is divided into two: `charset-big5-1'
|
|
|
3160 and `charset-big5-2'. Both <type>s are DIMENSION2_CHARS94. The former
|
|
|
3161 contains frequently used characters and the latter contains less
|
|
|
3162 frequently used characters. */
|
|
|
3163
|
|
|
3164 #define BYTE_BIG5_TWO_BYTE_1_P(c) \
|
|
|
3165 ((c) >= 0xA1 && (c) <= 0xFE)
|
|
|
3166
|
|
|
3167 /* Is this the second byte of a Shift-JIS two-byte char? */
|
|
|
3168
|
|
|
3169 #define BYTE_BIG5_TWO_BYTE_2_P(c) \
|
|
|
3170 (((c) >= 0x40 && (c) <= 0x7E) || ((c) >= 0xA1 && (c) <= 0xFE))
|
|
|
3171
|
|
|
3172 /* Number of Big5 characters which have the same code in 1st byte. */
|
|
|
3173
|
|
|
3174 #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40)
|
|
|
3175
|
|
|
3176 /* Code conversion macros. These are macros because they are used in
|
|
|
3177 inner loops during code conversion.
|
|
|
3178
|
|
|
3179 Note that temporary variables in macros introduce the classic
|
|
|
3180 dynamic-scoping problems with variable names. We use capital-
|
|
|
3181 lettered variables in the assumption that XEmacs does not use
|
|
|
3182 capital letters in variables except in a very formalized way
|
|
|
3183 (e.g. Qstring). */
|
|
|
3184
|
|
|
3185 /* Convert Big5 code (b1, b2) into its internal string representation
|
|
|
3186 (lb, c1, c2). */
|
|
|
3187
|
|
|
3188 /* There is a much simpler way to split the Big5 charset into two.
|
|
|
3189 For the moment I'm going to leave the algorithm as-is because it
|
|
|
3190 claims to separate out the most-used characters into a single
|
|
|
3191 charset, which perhaps will lead to optimizations in various
|
|
|
3192 places.
|
|
|
3193
|
|
|
3194 The way the algorithm works is something like this:
|
|
|
3195
|
|
|
3196 Big5 can be viewed as a 94x157 charset, where the row is
|
|
|
3197 encoded into the bytes 0xA1 .. 0xFE and the column is encoded
|
|
|
3198 into the bytes 0x40 .. 0x7E and 0xA1 .. 0xFE. As for frequency,
|
|
|
3199 the split between low and high column numbers is apparently
|
|
|
3200 meaningless; ascending rows produce less and less frequent chars.
|
|
|
3201 Therefore, we assign the lower half of rows (0xA1 .. 0xC8) to
|
|
|
3202 the first charset, and the upper half (0xC9 .. 0xFE) to the
|
|
|
3203 second. To do the conversion, we convert the character into
|
|
|
3204 a single number where 0 .. 156 is the first row, 157 .. 313
|
|
|
3205 is the second, etc. That way, the characters are ordered by
|
|
|
3206 decreasing frequency. Then we just chop the space in two
|
|
|
3207 and coerce the result into a 94x94 space.
|
|
|
3208 */
|
|
|
3209
|
|
|
3210 #define DECODE_BIG5(b1, b2, lb, c1, c2) do \
|
|
|
3211 { \
|
|
|
3212 int B1 = b1, B2 = b2; \
|
|
|
3213 unsigned int I \
|
|
|
3214 = (B1 - 0xA1) * BIG5_SAME_ROW + B2 - (B2 < 0x7F ? 0x40 : 0x62); \
|
|
|
3215 \
|
|
|
3216 if (B1 < 0xC9) \
|
|
|
3217 { \
|
|
|
3218 lb = LEADING_BYTE_CHINESE_BIG5_1; \
|
|
|
3219 } \
|
|
|
3220 else \
|
|
|
3221 { \
|
|
|
3222 lb = LEADING_BYTE_CHINESE_BIG5_2; \
|
|
|
3223 I -= (BIG5_SAME_ROW) * (0xC9 - 0xA1); \
|
|
|
3224 } \
|
|
|
3225 c1 = I / (0xFF - 0xA1) + 0xA1; \
|
|
|
3226 c2 = I % (0xFF - 0xA1) + 0xA1; \
|
|
|
3227 } while (0)
|
|
|
3228
|
|
|
3229 /* Convert the internal string representation of a Big5 character
|
|
|
3230 (lb, c1, c2) into Big5 code (b1, b2). */
|
|
|
3231
|
|
|
3232 #define ENCODE_BIG5(lb, c1, c2, b1, b2) do \
|
|
|
3233 { \
|
|
|
3234 unsigned int I = ((c1) - 0xA1) * (0xFF - 0xA1) + ((c2) - 0xA1); \
|
|
|
3235 \
|
|
|
3236 if (lb == LEADING_BYTE_CHINESE_BIG5_2) \
|
|
|
3237 { \
|
|
|
3238 I += BIG5_SAME_ROW * (0xC9 - 0xA1); \
|
|
|
3239 } \
|
|
|
3240 b1 = I / BIG5_SAME_ROW + 0xA1; \
|
|
|
3241 b2 = I % BIG5_SAME_ROW; \
|
|
|
3242 b2 += b2 < 0x3F ? 0x40 : 0x62; \
|
|
|
3243 } while (0)
|
|
|
3244
|
|
|
3245 static int
|
|
442
|
3246 detect_coding_big5 (struct detection_state *st, const unsigned char *src,
|
|
428
|
3247 unsigned int n)
|
|
|
3248 {
|
|
|
3249 int c;
|
|
|
3250
|
|
|
3251 while (n--)
|
|
|
3252 {
|
|
|
3253 c = *src++;
|
|
|
3254 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO ||
|
|
|
3255 (c >= 0x80 && c <= 0xA0))
|
|
|
3256 return 0;
|
|
|
3257 if (st->big5.in_second_byte)
|
|
|
3258 {
|
|
|
3259 st->big5.in_second_byte = 0;
|
|
|
3260 if (c < 0x40 || (c >= 0x80 && c <= 0xA0))
|
|
|
3261 return 0;
|
|
|
3262 }
|
|
|
3263 else if (c >= 0xA1)
|
|
|
3264 st->big5.in_second_byte = 1;
|
|
|
3265 }
|
|
|
3266 return CODING_CATEGORY_BIG5_MASK;
|
|
|
3267 }
|
|
|
3268
|
|
|
3269 /* Convert Big5 data to internal format. */
|
|
|
3270
|
|
|
3271 static void
|
|
442
|
3272 decode_coding_big5 (Lstream *decoding, const unsigned char *src,
|
|
428
|
3273 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3274 {
|
|
|
3275 unsigned char c;
|
|
|
3276 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3277 unsigned int flags = str->flags;
|
|
|
3278 unsigned int ch = str->ch;
|
|
|
3279 eol_type_t eol_type = str->eol_type;
|
|
|
3280
|
|
|
3281 while (n--)
|
|
|
3282 {
|
|
|
3283 c = *src++;
|
|
|
3284 if (ch)
|
|
|
3285 {
|
|
|
3286 /* Previous character was first byte of Big5 char. */
|
|
|
3287 if (BYTE_BIG5_TWO_BYTE_2_P (c))
|
|
|
3288 {
|
|
|
3289 unsigned char b1, b2, b3;
|
|
|
3290 DECODE_BIG5 (ch, c, b1, b2, b3);
|
|
|
3291 Dynarr_add (dst, b1);
|
|
|
3292 Dynarr_add (dst, b2);
|
|
|
3293 Dynarr_add (dst, b3);
|
|
|
3294 }
|
|
|
3295 else
|
|
|
3296 {
|
|
|
3297 DECODE_ADD_BINARY_CHAR (ch, dst);
|
|
|
3298 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3299 }
|
|
|
3300 ch = 0;
|
|
|
3301 }
|
|
|
3302 else
|
|
|
3303 {
|
|
|
3304 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3305 if (BYTE_BIG5_TWO_BYTE_1_P (c))
|
|
|
3306 ch = c;
|
|
|
3307 else
|
|
|
3308 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
3309 }
|
|
|
3310 label_continue_loop:;
|
|
|
3311 }
|
|
|
3312
|
|
|
3313 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
3314
|
|
|
3315 str->flags = flags;
|
|
|
3316 str->ch = ch;
|
|
|
3317 }
|
|
|
3318
|
|
|
3319 /* Convert internally-formatted data to Big5. */
|
|
|
3320
|
|
|
3321 static void
|
|
442
|
3322 encode_coding_big5 (Lstream *encoding, const unsigned char *src,
|
|
428
|
3323 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3324 {
|
|
|
3325 unsigned char c;
|
|
|
3326 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3327 unsigned int flags = str->flags;
|
|
|
3328 unsigned int ch = str->ch;
|
|
|
3329 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3330
|
|
|
3331 while (n--)
|
|
|
3332 {
|
|
|
3333 c = *src++;
|
|
|
3334 if (c == '\n')
|
|
|
3335 {
|
|
|
3336 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3337 Dynarr_add (dst, '\r');
|
|
|
3338 if (eol_type != EOL_CR)
|
|
|
3339 Dynarr_add (dst, '\n');
|
|
|
3340 }
|
|
|
3341 else if (BYTE_ASCII_P (c))
|
|
|
3342 {
|
|
|
3343 /* ASCII. */
|
|
|
3344 Dynarr_add (dst, c);
|
|
|
3345 }
|
|
|
3346 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
3347 {
|
|
|
3348 if (c == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3349 c == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3350 {
|
|
|
3351 /* A recognized leading byte. */
|
|
|
3352 ch = c;
|
|
|
3353 continue; /* not done with this character. */
|
|
|
3354 }
|
|
|
3355 /* otherwise just ignore this character. */
|
|
|
3356 }
|
|
|
3357 else if (ch == LEADING_BYTE_CHINESE_BIG5_1 ||
|
|
|
3358 ch == LEADING_BYTE_CHINESE_BIG5_2)
|
|
|
3359 {
|
|
|
3360 /* Previous char was a recognized leading byte. */
|
|
|
3361 ch = (ch << 8) | c;
|
|
|
3362 continue; /* not done with this character. */
|
|
|
3363 }
|
|
|
3364 else if (ch)
|
|
|
3365 {
|
|
|
3366 /* Encountering second byte of a Big5 character. */
|
|
|
3367 unsigned char b1, b2;
|
|
|
3368
|
|
|
3369 ENCODE_BIG5 (ch >> 8, ch & 0xFF, c, b1, b2);
|
|
|
3370 Dynarr_add (dst, b1);
|
|
|
3371 Dynarr_add (dst, b2);
|
|
|
3372 }
|
|
|
3373
|
|
|
3374 ch = 0;
|
|
|
3375 }
|
|
|
3376
|
|
|
3377 str->flags = flags;
|
|
|
3378 str->ch = ch;
|
|
|
3379 }
|
|
|
3380
|
|
|
3381
|
|
|
3382 DEFUN ("decode-big5-char", Fdecode_big5_char, 1, 1, 0, /*
|
|
|
3383 Decode a Big5 character CODE of BIG5 coding-system.
|
|
|
3384 CODE is the character code in BIG5, a cons of two integers.
|
|
|
3385 Return the corresponding character.
|
|
|
3386 */
|
|
|
3387 (code))
|
|
|
3388 {
|
|
|
3389 unsigned char c1, c2, b1, b2;
|
|
|
3390
|
|
|
3391 CHECK_CONS (code);
|
|
|
3392 CHECK_INT (XCAR (code));
|
|
|
3393 CHECK_INT (XCDR (code));
|
|
|
3394 b1 = XINT (XCAR (code));
|
|
|
3395 b2 = XINT (XCDR (code));
|
|
|
3396 if (BYTE_BIG5_TWO_BYTE_1_P (b1) &&
|
|
|
3397 BYTE_BIG5_TWO_BYTE_2_P (b2))
|
|
|
3398 {
|
|
|
3399 int leading_byte;
|
|
|
3400 Lisp_Object charset;
|
|
|
3401 DECODE_BIG5 (b1, b2, leading_byte, c1, c2);
|
|
|
3402 charset = CHARSET_BY_LEADING_BYTE (leading_byte);
|
|
|
3403 return make_char (MAKE_CHAR (charset, c1 & 0x7F, c2 & 0x7F));
|
|
|
3404 }
|
|
|
3405 else
|
|
|
3406 return Qnil;
|
|
|
3407 }
|
|
|
3408
|
|
|
3409 DEFUN ("encode-big5-char", Fencode_big5_char, 1, 1, 0, /*
|
|
|
3410 Encode the Big5 character CH to BIG5 coding-system.
|
|
|
3411 Return the corresponding character code in Big5.
|
|
|
3412 */
|
|
|
3413 (ch))
|
|
|
3414 {
|
|
|
3415 Lisp_Object charset;
|
|
|
3416 int c1, c2, b1, b2;
|
|
|
3417
|
|
|
3418 CHECK_CHAR_COERCE_INT (ch);
|
|
|
3419 BREAKUP_CHAR (XCHAR (ch), charset, c1, c2);
|
|
|
3420 if (EQ (charset, Vcharset_chinese_big5_1) ||
|
|
|
3421 EQ (charset, Vcharset_chinese_big5_2))
|
|
|
3422 {
|
|
|
3423 ENCODE_BIG5 (XCHARSET_LEADING_BYTE (charset), c1 | 0x80, c2 | 0x80,
|
|
|
3424 b1, b2);
|
|
|
3425 return Fcons (make_int (b1), make_int (b2));
|
|
|
3426 }
|
|
|
3427 else
|
|
|
3428 return Qnil;
|
|
|
3429 }
|
|
|
3430
|
|
|
3431
|
|
|
3432 /************************************************************************/
|
|
|
3433 /* UCS-4 methods */
|
|
|
3434 /* */
|
|
|
3435 /* UCS-4 character codes are implemented as nonnegative integers. */
|
|
|
3436 /* */
|
|
|
3437 /************************************************************************/
|
|
|
3438
|
|
|
3439
|
|
|
3440 DEFUN ("set-ucs-char", Fset_ucs_char, 2, 2, 0, /*
|
|
|
3441 Map UCS-4 code CODE to Mule character CHARACTER.
|
|
|
3442
|
|
|
3443 Return T on success, NIL on failure.
|
|
|
3444 */
|
|
|
3445 (code, character))
|
|
|
3446 {
|
|
442
|
3447 size_t c;
|
|
428
|
3448
|
|
|
3449 CHECK_CHAR (character);
|
|
442
|
3450 CHECK_NATNUM (code);
|
|
428
|
3451 c = XINT (code);
|
|
|
3452
|
|
442
|
3453 if (c < countof (fcd->ucs_to_mule_table))
|
|
428
|
3454 {
|
|
|
3455 fcd->ucs_to_mule_table[c] = character;
|
|
|
3456 return Qt;
|
|
|
3457 }
|
|
|
3458 else
|
|
|
3459 return Qnil;
|
|
|
3460 }
|
|
|
3461
|
|
|
3462 static Lisp_Object
|
|
|
3463 ucs_to_char (unsigned long code)
|
|
|
3464 {
|
|
442
|
3465 if (code < countof (fcd->ucs_to_mule_table))
|
|
428
|
3466 {
|
|
|
3467 return fcd->ucs_to_mule_table[code];
|
|
|
3468 }
|
|
|
3469 else if ((0xe00000 <= code) && (code <= 0xe00000 + 94 * 94 * 14))
|
|
|
3470 {
|
|
|
3471 unsigned int c;
|
|
|
3472
|
|
|
3473 code -= 0xe00000;
|
|
|
3474 c = code % (94 * 94);
|
|
|
3475 return make_char
|
|
|
3476 (MAKE_CHAR (CHARSET_BY_ATTRIBUTES
|
|
|
3477 (CHARSET_TYPE_94X94, code / (94 * 94) + '@',
|
|
|
3478 CHARSET_LEFT_TO_RIGHT),
|
|
|
3479 c / 94 + 33, c % 94 + 33));
|
|
|
3480 }
|
|
|
3481 else
|
|
|
3482 return Qnil;
|
|
|
3483 }
|
|
|
3484
|
|
|
3485 DEFUN ("ucs-char", Fucs_char, 1, 1, 0, /*
|
|
|
3486 Return Mule character corresponding to UCS code CODE (a positive integer).
|
|
|
3487 */
|
|
|
3488 (code))
|
|
|
3489 {
|
|
|
3490 CHECK_NATNUM (code);
|
|
|
3491 return ucs_to_char (XINT (code));
|
|
|
3492 }
|
|
|
3493
|
|
|
3494 DEFUN ("set-char-ucs", Fset_char_ucs, 2, 2, 0, /*
|
|
|
3495 Map Mule character CHARACTER to UCS code CODE (a positive integer).
|
|
|
3496 */
|
|
|
3497 (character, code))
|
|
|
3498 {
|
|
|
3499 /* #### Isn't this gilding the lily? Fput_char_table checks its args.
|
|
|
3500 Fset_char_ucs is more restrictive on index arg, but should
|
|
|
3501 check code arg in a char_table method. */
|
|
|
3502 CHECK_CHAR (character);
|
|
|
3503 CHECK_NATNUM (code);
|
|
|
3504 return Fput_char_table (character, code, mule_to_ucs_table);
|
|
|
3505 }
|
|
|
3506
|
|
|
3507 DEFUN ("char-ucs", Fchar_ucs, 1, 1, 0, /*
|
|
|
3508 Return the UCS code (a positive integer) corresponding to CHARACTER.
|
|
|
3509 */
|
|
|
3510 (character))
|
|
|
3511 {
|
|
|
3512 return Fget_char_table (character, mule_to_ucs_table);
|
|
|
3513 }
|
|
|
3514
|
|
|
3515 /* Decode a UCS-4 character into a buffer. If the lookup fails, use
|
|
|
3516 <GETA MARK> (U+3013) of JIS X 0208, which means correct character
|
|
|
3517 is not found, instead.
|
|
|
3518 #### do something more appropriate (use blob?)
|
|
|
3519 Danger, Will Robinson! Data loss. Should we signal user? */
|
|
|
3520 static void
|
|
|
3521 decode_ucs4 (unsigned long ch, unsigned_char_dynarr *dst)
|
|
|
3522 {
|
|
|
3523 Lisp_Object chr = ucs_to_char (ch);
|
|
|
3524
|
|
|
3525 if (! NILP (chr))
|
|
|
3526 {
|
|
|
3527 Bufbyte work[MAX_EMCHAR_LEN];
|
|
|
3528 int len;
|
|
|
3529
|
|
|
3530 ch = XCHAR (chr);
|
|
|
3531 len = (ch < 128) ?
|
|
|
3532 simple_set_charptr_emchar (work, ch) :
|
|
|
3533 non_ascii_set_charptr_emchar (work, ch);
|
|
|
3534 Dynarr_add_many (dst, work, len);
|
|
|
3535 }
|
|
|
3536 else
|
|
|
3537 {
|
|
|
3538 Dynarr_add (dst, LEADING_BYTE_JAPANESE_JISX0208);
|
|
|
3539 Dynarr_add (dst, 34 + 128);
|
|
|
3540 Dynarr_add (dst, 46 + 128);
|
|
|
3541 }
|
|
|
3542 }
|
|
|
3543
|
|
|
3544 static unsigned long
|
|
|
3545 mule_char_to_ucs4 (Lisp_Object charset,
|
|
|
3546 unsigned char h, unsigned char l)
|
|
|
3547 {
|
|
|
3548 Lisp_Object code
|
|
|
3549 = Fget_char_table (make_char (MAKE_CHAR (charset, h & 127, l & 127)),
|
|
|
3550 mule_to_ucs_table);
|
|
|
3551
|
|
|
3552 if (INTP (code))
|
|
|
3553 {
|
|
|
3554 return XINT (code);
|
|
|
3555 }
|
|
|
3556 else if ( (XCHARSET_DIMENSION (charset) == 2) &&
|
|
|
3557 (XCHARSET_CHARS (charset) == 94) )
|
|
|
3558 {
|
|
|
3559 unsigned char final = XCHARSET_FINAL (charset);
|
|
|
3560
|
|
|
3561 if ( ('@' <= final) && (final < 0x7f) )
|
|
|
3562 {
|
|
|
3563 return 0xe00000 + (final - '@') * 94 * 94
|
|
|
3564 + ((h & 127) - 33) * 94 + (l & 127) - 33;
|
|
|
3565 }
|
|
|
3566 else
|
|
|
3567 {
|
|
|
3568 return '?';
|
|
|
3569 }
|
|
|
3570 }
|
|
|
3571 else
|
|
|
3572 {
|
|
|
3573 return '?';
|
|
|
3574 }
|
|
|
3575 }
|
|
|
3576
|
|
|
3577 static void
|
|
|
3578 encode_ucs4 (Lisp_Object charset,
|
|
|
3579 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3580 {
|
|
|
3581 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3582 Dynarr_add (dst, code >> 24);
|
|
|
3583 Dynarr_add (dst, (code >> 16) & 255);
|
|
|
3584 Dynarr_add (dst, (code >> 8) & 255);
|
|
|
3585 Dynarr_add (dst, code & 255);
|
|
|
3586 }
|
|
|
3587
|
|
|
3588 static int
|
|
442
|
3589 detect_coding_ucs4 (struct detection_state *st, const unsigned char *src,
|
|
428
|
3590 unsigned int n)
|
|
|
3591 {
|
|
|
3592 while (n--)
|
|
|
3593 {
|
|
|
3594 int c = *src++;
|
|
|
3595 switch (st->ucs4.in_byte)
|
|
|
3596 {
|
|
|
3597 case 0:
|
|
|
3598 if (c >= 128)
|
|
|
3599 return 0;
|
|
|
3600 else
|
|
|
3601 st->ucs4.in_byte++;
|
|
|
3602 break;
|
|
|
3603 case 3:
|
|
|
3604 st->ucs4.in_byte = 0;
|
|
|
3605 break;
|
|
|
3606 default:
|
|
|
3607 st->ucs4.in_byte++;
|
|
|
3608 }
|
|
|
3609 }
|
|
|
3610 return CODING_CATEGORY_UCS4_MASK;
|
|
|
3611 }
|
|
|
3612
|
|
|
3613 static void
|
|
442
|
3614 decode_coding_ucs4 (Lstream *decoding, const unsigned char *src,
|
|
428
|
3615 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3616 {
|
|
|
3617 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3618 unsigned int flags = str->flags;
|
|
|
3619 unsigned int ch = str->ch;
|
|
|
3620 unsigned char counter = str->counter;
|
|
|
3621
|
|
|
3622 while (n--)
|
|
|
3623 {
|
|
|
3624 unsigned char c = *src++;
|
|
|
3625 switch (counter)
|
|
|
3626 {
|
|
|
3627 case 0:
|
|
|
3628 ch = c;
|
|
|
3629 counter = 3;
|
|
|
3630 break;
|
|
|
3631 case 1:
|
|
|
3632 decode_ucs4 ( ( ch << 8 ) | c, dst);
|
|
|
3633 ch = 0;
|
|
|
3634 counter = 0;
|
|
|
3635 break;
|
|
|
3636 default:
|
|
|
3637 ch = ( ch << 8 ) | c;
|
|
|
3638 counter--;
|
|
|
3639 }
|
|
|
3640 }
|
|
|
3641 if (counter & CODING_STATE_END)
|
|
|
3642 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3643
|
|
|
3644 str->flags = flags;
|
|
|
3645 str->ch = ch;
|
|
|
3646 str->counter = counter;
|
|
|
3647 }
|
|
|
3648
|
|
|
3649 static void
|
|
442
|
3650 encode_coding_ucs4 (Lstream *encoding, const unsigned char *src,
|
|
428
|
3651 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3652 {
|
|
|
3653 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3654 unsigned int flags = str->flags;
|
|
|
3655 unsigned int ch = str->ch;
|
|
|
3656 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3657 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3658
|
|
|
3659 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3660 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3661 on the source while we're outputting the composite char. */
|
|
|
3662 unsigned int saved_n = 0;
|
|
442
|
3663 const unsigned char *saved_src = NULL;
|
|
428
|
3664 int in_composite = 0;
|
|
|
3665
|
|
|
3666 back_to_square_n:
|
|
|
3667 #endif
|
|
|
3668
|
|
|
3669 while (n--)
|
|
|
3670 {
|
|
|
3671 unsigned char c = *src++;
|
|
|
3672
|
|
|
3673 if (BYTE_ASCII_P (c))
|
|
|
3674 { /* Processing ASCII character */
|
|
|
3675 ch = 0;
|
|
|
3676 encode_ucs4 (Vcharset_ascii, c, 0, dst);
|
|
|
3677 char_boundary = 1;
|
|
|
3678 }
|
|
|
3679 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3680 { /* Processing Leading Byte */
|
|
|
3681 ch = 0;
|
|
|
3682 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3683 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3684 ch = c;
|
|
|
3685 char_boundary = 0;
|
|
|
3686 }
|
|
|
3687 else
|
|
|
3688 { /* Processing Non-ASCII character */
|
|
|
3689 char_boundary = 1;
|
|
|
3690 if (EQ (charset, Vcharset_control_1))
|
|
|
3691 {
|
|
|
3692 encode_ucs4 (Vcharset_control_1, c, 0, dst);
|
|
|
3693 }
|
|
|
3694 else
|
|
|
3695 {
|
|
|
3696 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3697 {
|
|
|
3698 case 2:
|
|
|
3699 encode_ucs4 (charset, c, 0, dst);
|
|
|
3700 break;
|
|
|
3701 case 3:
|
|
|
3702 if (XCHARSET_PRIVATE_P (charset))
|
|
|
3703 {
|
|
|
3704 encode_ucs4 (charset, c, 0, dst);
|
|
|
3705 ch = 0;
|
|
|
3706 }
|
|
|
3707 else if (ch)
|
|
|
3708 {
|
|
|
3709 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3710 if (EQ (charset, Vcharset_composite))
|
|
|
3711 {
|
|
|
3712 if (in_composite)
|
|
|
3713 {
|
|
|
3714 /* #### Bother! We don't know how to
|
|
|
3715 handle this yet. */
|
|
|
3716 Dynarr_add (dst, 0);
|
|
|
3717 Dynarr_add (dst, 0);
|
|
|
3718 Dynarr_add (dst, 0);
|
|
|
3719 Dynarr_add (dst, '~');
|
|
|
3720 }
|
|
|
3721 else
|
|
|
3722 {
|
|
|
3723 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
3724 ch & 0x7F, c & 0x7F);
|
|
|
3725 Lisp_Object lstr = composite_char_string (emch);
|
|
|
3726 saved_n = n;
|
|
|
3727 saved_src = src;
|
|
|
3728 in_composite = 1;
|
|
|
3729 src = XSTRING_DATA (lstr);
|
|
|
3730 n = XSTRING_LENGTH (lstr);
|
|
|
3731 }
|
|
|
3732 }
|
|
|
3733 else
|
|
|
3734 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3735 {
|
|
|
3736 encode_ucs4(charset, ch, c, dst);
|
|
|
3737 }
|
|
|
3738 ch = 0;
|
|
|
3739 }
|
|
|
3740 else
|
|
|
3741 {
|
|
|
3742 ch = c;
|
|
|
3743 char_boundary = 0;
|
|
|
3744 }
|
|
|
3745 break;
|
|
|
3746 case 4:
|
|
|
3747 if (ch)
|
|
|
3748 {
|
|
|
3749 encode_ucs4 (charset, ch, c, dst);
|
|
|
3750 ch = 0;
|
|
|
3751 }
|
|
|
3752 else
|
|
|
3753 {
|
|
|
3754 ch = c;
|
|
|
3755 char_boundary = 0;
|
|
|
3756 }
|
|
|
3757 break;
|
|
|
3758 default:
|
|
|
3759 abort ();
|
|
|
3760 }
|
|
|
3761 }
|
|
|
3762 }
|
|
|
3763 }
|
|
|
3764
|
|
|
3765 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3766 if (in_composite)
|
|
|
3767 {
|
|
|
3768 n = saved_n;
|
|
|
3769 src = saved_src;
|
|
|
3770 in_composite = 0;
|
|
|
3771 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
3772 }
|
|
|
3773 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3774
|
|
|
3775 str->flags = flags;
|
|
|
3776 str->ch = ch;
|
|
|
3777 str->iso2022.current_char_boundary = char_boundary;
|
|
|
3778 str->iso2022.current_charset = charset;
|
|
|
3779
|
|
|
3780 /* Verbum caro factum est! */
|
|
|
3781 }
|
|
|
3782
|
|
|
3783
|
|
|
3784 /************************************************************************/
|
|
|
3785 /* UTF-8 methods */
|
|
|
3786 /************************************************************************/
|
|
|
3787
|
|
|
3788 static int
|
|
442
|
3789 detect_coding_utf8 (struct detection_state *st, const unsigned char *src,
|
|
428
|
3790 unsigned int n)
|
|
|
3791 {
|
|
|
3792 while (n--)
|
|
|
3793 {
|
|
|
3794 unsigned char c = *src++;
|
|
|
3795 switch (st->utf8.in_byte)
|
|
|
3796 {
|
|
|
3797 case 0:
|
|
|
3798 if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)
|
|
|
3799 return 0;
|
|
|
3800 else if (c >= 0xfc)
|
|
|
3801 st->utf8.in_byte = 5;
|
|
|
3802 else if (c >= 0xf8)
|
|
|
3803 st->utf8.in_byte = 4;
|
|
|
3804 else if (c >= 0xf0)
|
|
|
3805 st->utf8.in_byte = 3;
|
|
|
3806 else if (c >= 0xe0)
|
|
|
3807 st->utf8.in_byte = 2;
|
|
|
3808 else if (c >= 0xc0)
|
|
|
3809 st->utf8.in_byte = 1;
|
|
|
3810 else if (c >= 0x80)
|
|
|
3811 return 0;
|
|
|
3812 break;
|
|
|
3813 default:
|
|
|
3814 if ((c & 0xc0) != 0x80)
|
|
|
3815 return 0;
|
|
|
3816 else
|
|
|
3817 st->utf8.in_byte--;
|
|
|
3818 }
|
|
|
3819 }
|
|
|
3820 return CODING_CATEGORY_UTF8_MASK;
|
|
|
3821 }
|
|
|
3822
|
|
|
3823 static void
|
|
442
|
3824 decode_coding_utf8 (Lstream *decoding, const unsigned char *src,
|
|
428
|
3825 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3826 {
|
|
|
3827 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
3828 unsigned int flags = str->flags;
|
|
|
3829 unsigned int ch = str->ch;
|
|
|
3830 eol_type_t eol_type = str->eol_type;
|
|
|
3831 unsigned char counter = str->counter;
|
|
|
3832
|
|
|
3833 while (n--)
|
|
|
3834 {
|
|
|
3835 unsigned char c = *src++;
|
|
|
3836 switch (counter)
|
|
|
3837 {
|
|
|
3838 case 0:
|
|
|
3839 if ( c >= 0xfc )
|
|
|
3840 {
|
|
|
3841 ch = c & 0x01;
|
|
|
3842 counter = 5;
|
|
|
3843 }
|
|
|
3844 else if ( c >= 0xf8 )
|
|
|
3845 {
|
|
|
3846 ch = c & 0x03;
|
|
|
3847 counter = 4;
|
|
|
3848 }
|
|
|
3849 else if ( c >= 0xf0 )
|
|
|
3850 {
|
|
|
3851 ch = c & 0x07;
|
|
|
3852 counter = 3;
|
|
|
3853 }
|
|
|
3854 else if ( c >= 0xe0 )
|
|
|
3855 {
|
|
|
3856 ch = c & 0x0f;
|
|
|
3857 counter = 2;
|
|
|
3858 }
|
|
|
3859 else if ( c >= 0xc0 )
|
|
|
3860 {
|
|
|
3861 ch = c & 0x1f;
|
|
|
3862 counter = 1;
|
|
|
3863 }
|
|
|
3864 else
|
|
|
3865 {
|
|
|
3866 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
3867 decode_ucs4 (c, dst);
|
|
|
3868 }
|
|
|
3869 break;
|
|
|
3870 case 1:
|
|
|
3871 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
|
3872 decode_ucs4 (ch, dst);
|
|
|
3873 ch = 0;
|
|
|
3874 counter = 0;
|
|
|
3875 break;
|
|
|
3876 default:
|
|
|
3877 ch = ( ch << 6 ) | ( c & 0x3f );
|
|
|
3878 counter--;
|
|
|
3879 }
|
|
|
3880 label_continue_loop:;
|
|
|
3881 }
|
|
|
3882
|
|
|
3883 if (flags & CODING_STATE_END)
|
|
|
3884 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
3885
|
|
|
3886 str->flags = flags;
|
|
|
3887 str->ch = ch;
|
|
|
3888 str->counter = counter;
|
|
|
3889 }
|
|
|
3890
|
|
|
3891 static void
|
|
|
3892 encode_utf8 (Lisp_Object charset,
|
|
|
3893 unsigned char h, unsigned char l, unsigned_char_dynarr *dst)
|
|
|
3894 {
|
|
|
3895 unsigned long code = mule_char_to_ucs4 (charset, h, l);
|
|
|
3896 if ( code <= 0x7f )
|
|
|
3897 {
|
|
|
3898 Dynarr_add (dst, code);
|
|
|
3899 }
|
|
|
3900 else if ( code <= 0x7ff )
|
|
|
3901 {
|
|
|
3902 Dynarr_add (dst, (code >> 6) | 0xc0);
|
|
|
3903 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3904 }
|
|
|
3905 else if ( code <= 0xffff )
|
|
|
3906 {
|
|
|
3907 Dynarr_add (dst, (code >> 12) | 0xe0);
|
|
|
3908 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3909 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3910 }
|
|
|
3911 else if ( code <= 0x1fffff )
|
|
|
3912 {
|
|
|
3913 Dynarr_add (dst, (code >> 18) | 0xf0);
|
|
|
3914 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3915 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3916 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3917 }
|
|
|
3918 else if ( code <= 0x3ffffff )
|
|
|
3919 {
|
|
|
3920 Dynarr_add (dst, (code >> 24) | 0xf8);
|
|
|
3921 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3922 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3923 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3924 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3925 }
|
|
|
3926 else
|
|
|
3927 {
|
|
|
3928 Dynarr_add (dst, (code >> 30) | 0xfc);
|
|
|
3929 Dynarr_add (dst, ((code >> 24) & 0x3f) | 0x80);
|
|
|
3930 Dynarr_add (dst, ((code >> 18) & 0x3f) | 0x80);
|
|
|
3931 Dynarr_add (dst, ((code >> 12) & 0x3f) | 0x80);
|
|
|
3932 Dynarr_add (dst, ((code >> 6) & 0x3f) | 0x80);
|
|
|
3933 Dynarr_add (dst, (code & 0x3f) | 0x80);
|
|
|
3934 }
|
|
|
3935 }
|
|
|
3936
|
|
|
3937 static void
|
|
442
|
3938 encode_coding_utf8 (Lstream *encoding, const unsigned char *src,
|
|
428
|
3939 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
3940 {
|
|
|
3941 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
3942 unsigned int flags = str->flags;
|
|
|
3943 unsigned int ch = str->ch;
|
|
|
3944 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
3945 unsigned char char_boundary = str->iso2022.current_char_boundary;
|
|
|
3946 Lisp_Object charset = str->iso2022.current_charset;
|
|
|
3947
|
|
|
3948 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
3949 /* flags for handling composite chars. We do a little switcharoo
|
|
|
3950 on the source while we're outputting the composite char. */
|
|
|
3951 unsigned int saved_n = 0;
|
|
442
|
3952 const unsigned char *saved_src = NULL;
|
|
428
|
3953 int in_composite = 0;
|
|
|
3954
|
|
|
3955 back_to_square_n:
|
|
|
3956 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
3957
|
|
|
3958 while (n--)
|
|
|
3959 {
|
|
|
3960 unsigned char c = *src++;
|
|
|
3961
|
|
|
3962 if (BYTE_ASCII_P (c))
|
|
|
3963 { /* Processing ASCII character */
|
|
|
3964 ch = 0;
|
|
|
3965 if (c == '\n')
|
|
|
3966 {
|
|
|
3967 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
3968 Dynarr_add (dst, '\r');
|
|
|
3969 if (eol_type != EOL_CR)
|
|
|
3970 Dynarr_add (dst, c);
|
|
|
3971 }
|
|
|
3972 else
|
|
|
3973 encode_utf8 (Vcharset_ascii, c, 0, dst);
|
|
|
3974 char_boundary = 1;
|
|
|
3975 }
|
|
|
3976 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
3977 { /* Processing Leading Byte */
|
|
|
3978 ch = 0;
|
|
|
3979 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
3980 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
3981 ch = c;
|
|
|
3982 char_boundary = 0;
|
|
|
3983 }
|
|
|
3984 else
|
|
|
3985 { /* Processing Non-ASCII character */
|
|
|
3986 char_boundary = 1;
|
|
|
3987 if (EQ (charset, Vcharset_control_1))
|
|
|
3988 {
|
|
|
3989 encode_utf8 (Vcharset_control_1, c, 0, dst);
|
|
|
3990 }
|
|
|
3991 else
|
|
|
3992 {
|
|
|
3993 switch (XCHARSET_REP_BYTES (charset))
|
|
|
3994 {
|
|
|
3995 case 2:
|
|
|
3996 encode_utf8 (charset, c, 0, dst);
|
|
|
3997 break;
|
|
|
3998 case 3:
|
|
|
3999 if (XCHARSET_PRIVATE_P (charset))
|
|
|
4000 {
|
|
|
4001 encode_utf8 (charset, c, 0, dst);
|
|
|
4002 ch = 0;
|
|
|
4003 }
|
|
|
4004 else if (ch)
|
|
|
4005 {
|
|
|
4006 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4007 if (EQ (charset, Vcharset_composite))
|
|
|
4008 {
|
|
|
4009 if (in_composite)
|
|
|
4010 {
|
|
|
4011 /* #### Bother! We don't know how to
|
|
|
4012 handle this yet. */
|
|
|
4013 encode_utf8 (Vcharset_ascii, '~', 0, dst);
|
|
|
4014 }
|
|
|
4015 else
|
|
|
4016 {
|
|
|
4017 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
4018 ch & 0x7F, c & 0x7F);
|
|
|
4019 Lisp_Object lstr = composite_char_string (emch);
|
|
|
4020 saved_n = n;
|
|
|
4021 saved_src = src;
|
|
|
4022 in_composite = 1;
|
|
|
4023 src = XSTRING_DATA (lstr);
|
|
|
4024 n = XSTRING_LENGTH (lstr);
|
|
|
4025 }
|
|
|
4026 }
|
|
|
4027 else
|
|
|
4028 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4029 {
|
|
|
4030 encode_utf8 (charset, ch, c, dst);
|
|
|
4031 }
|
|
|
4032 ch = 0;
|
|
|
4033 }
|
|
|
4034 else
|
|
|
4035 {
|
|
|
4036 ch = c;
|
|
|
4037 char_boundary = 0;
|
|
|
4038 }
|
|
|
4039 break;
|
|
|
4040 case 4:
|
|
|
4041 if (ch)
|
|
|
4042 {
|
|
|
4043 encode_utf8 (charset, ch, c, dst);
|
|
|
4044 ch = 0;
|
|
|
4045 }
|
|
|
4046 else
|
|
|
4047 {
|
|
|
4048 ch = c;
|
|
|
4049 char_boundary = 0;
|
|
|
4050 }
|
|
|
4051 break;
|
|
|
4052 default:
|
|
|
4053 abort ();
|
|
|
4054 }
|
|
|
4055 }
|
|
|
4056 }
|
|
|
4057 }
|
|
|
4058
|
|
|
4059 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4060 if (in_composite)
|
|
|
4061 {
|
|
|
4062 n = saved_n;
|
|
|
4063 src = saved_src;
|
|
|
4064 in_composite = 0;
|
|
|
4065 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
4066 }
|
|
|
4067 #endif
|
|
|
4068
|
|
|
4069 str->flags = flags;
|
|
|
4070 str->ch = ch;
|
|
|
4071 str->iso2022.current_char_boundary = char_boundary;
|
|
|
4072 str->iso2022.current_charset = charset;
|
|
|
4073
|
|
|
4074 /* Verbum caro factum est! */
|
|
|
4075 }
|
|
|
4076
|
|
|
4077
|
|
|
4078 /************************************************************************/
|
|
|
4079 /* ISO2022 methods */
|
|
|
4080 /************************************************************************/
|
|
|
4081
|
|
|
4082 /* The following note describes the coding system ISO2022 briefly.
|
|
|
4083 Since the intention of this note is to help understand the
|
|
|
4084 functions in this file, some parts are NOT ACCURATE or OVERLY
|
|
|
4085 SIMPLIFIED. For thorough understanding, please refer to the
|
|
|
4086 original document of ISO2022.
|
|
|
4087
|
|
|
4088 ISO2022 provides many mechanisms to encode several character sets
|
|
|
4089 in 7-bit and 8-bit environments. For 7-bit environments, all text
|
|
|
4090 is encoded using bytes less than 128. This may make the encoded
|
|
|
4091 text a little bit longer, but the text passes more easily through
|
|
|
4092 several gateways, some of which strip off MSB (Most Signigant Bit).
|
|
|
4093
|
|
|
4094 There are two kinds of character sets: control character set and
|
|
|
4095 graphic character set. The former contains control characters such
|
|
|
4096 as `newline' and `escape' to provide control functions (control
|
|
|
4097 functions are also provided by escape sequences). The latter
|
|
|
4098 contains graphic characters such as 'A' and '-'. Emacs recognizes
|
|
|
4099 two control character sets and many graphic character sets.
|
|
|
4100
|
|
|
4101 Graphic character sets are classified into one of the following
|
|
|
4102 four classes, according to the number of bytes (DIMENSION) and
|
|
|
4103 number of characters in one dimension (CHARS) of the set:
|
|
|
4104 - DIMENSION1_CHARS94
|
|
|
4105 - DIMENSION1_CHARS96
|
|
|
4106 - DIMENSION2_CHARS94
|
|
|
4107 - DIMENSION2_CHARS96
|
|
|
4108
|
|
|
4109 In addition, each character set is assigned an identification tag,
|
|
|
4110 unique for each set, called "final character" (denoted as <F>
|
|
|
4111 hereafter). The <F> of each character set is decided by ECMA(*)
|
|
|
4112 when it is registered in ISO. The code range of <F> is 0x30..0x7F
|
|
|
4113 (0x30..0x3F are for private use only).
|
|
|
4114
|
|
|
4115 Note (*): ECMA = European Computer Manufacturers Association
|
|
|
4116
|
|
|
4117 Here are examples of graphic character set [NAME(<F>)]:
|
|
|
4118 o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ...
|
|
|
4119 o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ...
|
|
|
4120 o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ...
|
|
|
4121 o DIMENSION2_CHARS96 -- none for the moment
|
|
|
4122
|
|
|
4123 A code area (1 byte = 8 bits) is divided into 4 areas, C0, GL, C1, and GR.
|
|
|
4124 C0 [0x00..0x1F] -- control character plane 0
|
|
|
4125 GL [0x20..0x7F] -- graphic character plane 0
|
|
|
4126 C1 [0x80..0x9F] -- control character plane 1
|
|
|
4127 GR [0xA0..0xFF] -- graphic character plane 1
|
|
|
4128
|
|
|
4129 A control character set is directly designated and invoked to C0 or
|
|
|
4130 C1 by an escape sequence. The most common case is that:
|
|
|
4131 - ISO646's control character set is designated/invoked to C0, and
|
|
|
4132 - ISO6429's control character set is designated/invoked to C1,
|
|
|
4133 and usually these designations/invocations are omitted in encoded
|
|
|
4134 text. In a 7-bit environment, only C0 can be used, and a control
|
|
|
4135 character for C1 is encoded by an appropriate escape sequence to
|
|
|
4136 fit into the environment. All control characters for C1 are
|
|
|
4137 defined to have corresponding escape sequences.
|
|
|
4138
|
|
|
4139 A graphic character set is at first designated to one of four
|
|
|
4140 graphic registers (G0 through G3), then these graphic registers are
|
|
|
4141 invoked to GL or GR. These designations and invocations can be
|
|
|
4142 done independently. The most common case is that G0 is invoked to
|
|
|
4143 GL, G1 is invoked to GR, and ASCII is designated to G0. Usually
|
|
|
4144 these invocations and designations are omitted in encoded text.
|
|
|
4145 In a 7-bit environment, only GL can be used.
|
|
|
4146
|
|
|
4147 When a graphic character set of CHARS94 is invoked to GL, codes
|
|
|
4148 0x20 and 0x7F of the GL area work as control characters SPACE and
|
|
|
4149 DEL respectively, and codes 0xA0 and 0xFF of the GR area should not
|
|
|
4150 be used.
|
|
|
4151
|
|
|
4152 There are two ways of invocation: locking-shift and single-shift.
|
|
|
4153 With locking-shift, the invocation lasts until the next different
|
|
|
4154 invocation, whereas with single-shift, the invocation affects the
|
|
|
4155 following character only and doesn't affect the locking-shift
|
|
|
4156 state. Invocations are done by the following control characters or
|
|
|
4157 escape sequences:
|
|
|
4158
|
|
|
4159 ----------------------------------------------------------------------
|
|
|
4160 abbrev function cntrl escape seq description
|
|
|
4161 ----------------------------------------------------------------------
|
|
|
4162 SI/LS0 (shift-in) 0x0F none invoke G0 into GL
|
|
|
4163 SO/LS1 (shift-out) 0x0E none invoke G1 into GL
|
|
|
4164 LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL
|
|
|
4165 LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL
|
|
|
4166 LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*)
|
|
|
4167 LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*)
|
|
|
4168 LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*)
|
|
|
4169 SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char
|
|
|
4170 SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char
|
|
|
4171 ----------------------------------------------------------------------
|
|
|
4172 (*) These are not used by any known coding system.
|
|
|
4173
|
|
|
4174 Control characters for these functions are defined by macros
|
|
|
4175 ISO_CODE_XXX in `coding.h'.
|
|
|
4176
|
|
|
4177 Designations are done by the following escape sequences:
|
|
|
4178 ----------------------------------------------------------------------
|
|
|
4179 escape sequence description
|
|
|
4180 ----------------------------------------------------------------------
|
|
|
4181 ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0
|
|
|
4182 ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1
|
|
|
4183 ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2
|
|
|
4184 ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3
|
|
|
4185 ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*)
|
|
|
4186 ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1
|
|
|
4187 ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2
|
|
|
4188 ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3
|
|
|
4189 ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**)
|
|
|
4190 ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1
|
|
|
4191 ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2
|
|
|
4192 ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3
|
|
|
4193 ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*)
|
|
|
4194 ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1
|
|
|
4195 ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2
|
|
|
4196 ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3
|
|
|
4197 ----------------------------------------------------------------------
|
|
|
4198
|
|
|
4199 In this list, "DIMENSION1_CHARS94<F>" means a graphic character set
|
|
|
4200 of dimension 1, chars 94, and final character <F>, etc...
|
|
|
4201
|
|
|
4202 Note (*): Although these designations are not allowed in ISO2022,
|
|
|
4203 Emacs accepts them on decoding, and produces them on encoding
|
|
|
4204 CHARS96 character sets in a coding system which is characterized as
|
|
|
4205 7-bit environment, non-locking-shift, and non-single-shift.
|
|
|
4206
|
|
|
4207 Note (**): If <F> is '@', 'A', or 'B', the intermediate character
|
|
|
4208 '(' can be omitted. We refer to this as "short-form" hereafter.
|
|
|
4209
|
|
|
4210 Now you may notice that there are a lot of ways for encoding the
|
|
|
4211 same multilingual text in ISO2022. Actually, there exist many
|
|
|
4212 coding systems such as Compound Text (used in X11's inter client
|
|
|
4213 communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR
|
|
|
4214 (used in Korean internet), EUC (Extended UNIX Code, used in Asian
|
|
|
4215 localized platforms), and all of these are variants of ISO2022.
|
|
|
4216
|
|
|
4217 In addition to the above, Emacs handles two more kinds of escape
|
|
|
4218 sequences: ISO6429's direction specification and Emacs' private
|
|
|
4219 sequence for specifying character composition.
|
|
|
4220
|
|
|
4221 ISO6429's direction specification takes the following form:
|
|
|
4222 o CSI ']' -- end of the current direction
|
|
|
4223 o CSI '0' ']' -- end of the current direction
|
|
|
4224 o CSI '1' ']' -- start of left-to-right text
|
|
|
4225 o CSI '2' ']' -- start of right-to-left text
|
|
|
4226 The control character CSI (0x9B: control sequence introducer) is
|
|
|
4227 abbreviated to the escape sequence ESC '[' in a 7-bit environment.
|
|
|
4228
|
|
|
4229 Character composition specification takes the following form:
|
|
|
4230 o ESC '0' -- start character composition
|
|
|
4231 o ESC '1' -- end character composition
|
|
|
4232 Since these are not standard escape sequences of any ISO standard,
|
|
|
4233 their use with these meanings is restricted to Emacs only. */
|
|
|
4234
|
|
|
4235 static void
|
|
|
4236 reset_iso2022 (Lisp_Object coding_system, struct iso2022_decoder *iso)
|
|
|
4237 {
|
|
|
4238 int i;
|
|
|
4239
|
|
|
4240 for (i = 0; i < 4; i++)
|
|
|
4241 {
|
|
|
4242 if (!NILP (coding_system))
|
|
|
4243 iso->charset[i] =
|
|
|
4244 XCODING_SYSTEM_ISO2022_INITIAL_CHARSET (coding_system, i);
|
|
|
4245 else
|
|
|
4246 iso->charset[i] = Qt;
|
|
|
4247 iso->invalid_designated[i] = 0;
|
|
|
4248 }
|
|
|
4249 iso->esc = ISO_ESC_NOTHING;
|
|
|
4250 iso->esc_bytes_index = 0;
|
|
|
4251 iso->register_left = 0;
|
|
|
4252 iso->register_right = 1;
|
|
|
4253 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4254 iso->invalid_switch_dir = 0;
|
|
|
4255 iso->output_direction_sequence = 0;
|
|
|
4256 iso->output_literally = 0;
|
|
|
4257 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4258 if (iso->composite_chars)
|
|
|
4259 Dynarr_reset (iso->composite_chars);
|
|
|
4260 #endif
|
|
|
4261 }
|
|
|
4262
|
|
|
4263 static int
|
|
|
4264 fit_to_be_escape_quoted (unsigned char c)
|
|
|
4265 {
|
|
|
4266 switch (c)
|
|
|
4267 {
|
|
|
4268 case ISO_CODE_ESC:
|
|
|
4269 case ISO_CODE_CSI:
|
|
|
4270 case ISO_CODE_SS2:
|
|
|
4271 case ISO_CODE_SS3:
|
|
|
4272 case ISO_CODE_SO:
|
|
|
4273 case ISO_CODE_SI:
|
|
|
4274 return 1;
|
|
|
4275
|
|
|
4276 default:
|
|
|
4277 return 0;
|
|
|
4278 }
|
|
|
4279 }
|
|
|
4280
|
|
|
4281 /* Parse one byte of an ISO2022 escape sequence.
|
|
|
4282 If the result is an invalid escape sequence, return 0 and
|
|
|
4283 do not change anything in STR. Otherwise, if the result is
|
|
|
4284 an incomplete escape sequence, update ISO2022.ESC and
|
|
|
4285 ISO2022.ESC_BYTES and return -1. Otherwise, update
|
|
|
4286 all the state variables (but not ISO2022.ESC_BYTES) and
|
|
|
4287 return 1.
|
|
|
4288
|
|
|
4289 If CHECK_INVALID_CHARSETS is non-zero, check for designation
|
|
|
4290 or invocation of an invalid character set and treat that as
|
|
|
4291 an unrecognized escape sequence. */
|
|
|
4292
|
|
|
4293 static int
|
|
|
4294 parse_iso2022_esc (Lisp_Object codesys, struct iso2022_decoder *iso,
|
|
|
4295 unsigned char c, unsigned int *flags,
|
|
|
4296 int check_invalid_charsets)
|
|
|
4297 {
|
|
|
4298 /* (1) If we're at the end of a designation sequence, CS is the
|
|
|
4299 charset being designated and REG is the register to designate
|
|
|
4300 it to.
|
|
|
4301
|
|
|
4302 (2) If we're at the end of a locking-shift sequence, REG is
|
|
|
4303 the register to invoke and HALF (0 == left, 1 == right) is
|
|
|
4304 the half to invoke it into.
|
|
|
4305
|
|
|
4306 (3) If we're at the end of a single-shift sequence, REG is
|
|
|
4307 the register to invoke. */
|
|
|
4308 Lisp_Object cs = Qnil;
|
|
|
4309 int reg, half;
|
|
|
4310
|
|
|
4311 /* NOTE: This code does goto's all over the fucking place.
|
|
|
4312 The reason for this is that we're basically implementing
|
|
|
4313 a state machine here, and hierarchical languages like C
|
|
|
4314 don't really provide a clean way of doing this. */
|
|
|
4315
|
|
|
4316 if (! (*flags & CODING_STATE_ESCAPE))
|
|
|
4317 /* At beginning of escape sequence; we need to reset our
|
|
|
4318 escape-state variables. */
|
|
|
4319 iso->esc = ISO_ESC_NOTHING;
|
|
|
4320
|
|
|
4321 iso->output_literally = 0;
|
|
|
4322 iso->output_direction_sequence = 0;
|
|
|
4323
|
|
|
4324 switch (iso->esc)
|
|
|
4325 {
|
|
|
4326 case ISO_ESC_NOTHING:
|
|
|
4327 iso->esc_bytes_index = 0;
|
|
|
4328 switch (c)
|
|
|
4329 {
|
|
|
4330 case ISO_CODE_ESC: /* Start escape sequence */
|
|
|
4331 *flags |= CODING_STATE_ESCAPE;
|
|
|
4332 iso->esc = ISO_ESC;
|
|
|
4333 goto not_done;
|
|
|
4334
|
|
|
4335 case ISO_CODE_CSI: /* ISO6429 (specifying directionality) */
|
|
|
4336 *flags |= CODING_STATE_ESCAPE;
|
|
|
4337 iso->esc = ISO_ESC_5_11;
|
|
|
4338 goto not_done;
|
|
|
4339
|
|
|
4340 case ISO_CODE_SO: /* locking shift 1 */
|
|
|
4341 reg = 1; half = 0;
|
|
|
4342 goto locking_shift;
|
|
|
4343 case ISO_CODE_SI: /* locking shift 0 */
|
|
|
4344 reg = 0; half = 0;
|
|
|
4345 goto locking_shift;
|
|
|
4346
|
|
|
4347 case ISO_CODE_SS2: /* single shift */
|
|
|
4348 reg = 2;
|
|
|
4349 goto single_shift;
|
|
|
4350 case ISO_CODE_SS3: /* single shift */
|
|
|
4351 reg = 3;
|
|
|
4352 goto single_shift;
|
|
|
4353
|
|
|
4354 default: /* Other control characters */
|
|
|
4355 return 0;
|
|
|
4356 }
|
|
|
4357
|
|
|
4358 case ISO_ESC:
|
|
|
4359 switch (c)
|
|
|
4360 {
|
|
|
4361 /**** single shift ****/
|
|
|
4362
|
|
|
4363 case 'N': /* single shift 2 */
|
|
|
4364 reg = 2;
|
|
|
4365 goto single_shift;
|
|
|
4366 case 'O': /* single shift 3 */
|
|
|
4367 reg = 3;
|
|
|
4368 goto single_shift;
|
|
|
4369
|
|
|
4370 /**** locking shift ****/
|
|
|
4371
|
|
|
4372 case '~': /* locking shift 1 right */
|
|
|
4373 reg = 1; half = 1;
|
|
|
4374 goto locking_shift;
|
|
|
4375 case 'n': /* locking shift 2 */
|
|
|
4376 reg = 2; half = 0;
|
|
|
4377 goto locking_shift;
|
|
|
4378 case '}': /* locking shift 2 right */
|
|
|
4379 reg = 2; half = 1;
|
|
|
4380 goto locking_shift;
|
|
|
4381 case 'o': /* locking shift 3 */
|
|
|
4382 reg = 3; half = 0;
|
|
|
4383 goto locking_shift;
|
|
|
4384 case '|': /* locking shift 3 right */
|
|
|
4385 reg = 3; half = 1;
|
|
|
4386 goto locking_shift;
|
|
|
4387
|
|
|
4388 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4389 /**** composite ****/
|
|
|
4390
|
|
|
4391 case '0':
|
|
|
4392 iso->esc = ISO_ESC_START_COMPOSITE;
|
|
|
4393 *flags = (*flags & CODING_STATE_ISO2022_LOCK) |
|
|
|
4394 CODING_STATE_COMPOSITE;
|
|
|
4395 return 1;
|
|
|
4396
|
|
|
4397 case '1':
|
|
|
4398 iso->esc = ISO_ESC_END_COMPOSITE;
|
|
|
4399 *flags = (*flags & CODING_STATE_ISO2022_LOCK) &
|
|
|
4400 ~CODING_STATE_COMPOSITE;
|
|
|
4401 return 1;
|
|
|
4402 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4403
|
|
|
4404 /**** directionality ****/
|
|
|
4405
|
|
|
4406 case '[':
|
|
|
4407 iso->esc = ISO_ESC_5_11;
|
|
|
4408 goto not_done;
|
|
|
4409
|
|
|
4410 /**** designation ****/
|
|
|
4411
|
|
|
4412 case '$': /* multibyte charset prefix */
|
|
|
4413 iso->esc = ISO_ESC_2_4;
|
|
|
4414 goto not_done;
|
|
|
4415
|
|
|
4416 default:
|
|
|
4417 if (0x28 <= c && c <= 0x2F)
|
|
|
4418 {
|
|
|
4419 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_8);
|
|
|
4420 goto not_done;
|
|
|
4421 }
|
|
|
4422
|
|
|
4423 /* This function is called with CODESYS equal to nil when
|
|
|
4424 doing coding-system detection. */
|
|
|
4425 if (!NILP (codesys)
|
|
|
4426 && XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
4427 && fit_to_be_escape_quoted (c))
|
|
|
4428 {
|
|
|
4429 iso->esc = ISO_ESC_LITERAL;
|
|
|
4430 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4431 return 1;
|
|
|
4432 }
|
|
|
4433
|
|
|
4434 /* bzzzt! */
|
|
|
4435 return 0;
|
|
|
4436 }
|
|
|
4437
|
|
|
4438
|
|
|
4439
|
|
|
4440 /**** directionality ****/
|
|
|
4441
|
|
|
4442 case ISO_ESC_5_11: /* ISO6429 direction control */
|
|
|
4443 if (c == ']')
|
|
|
4444 {
|
|
|
4445 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4446 goto directionality;
|
|
|
4447 }
|
|
|
4448 if (c == '0') iso->esc = ISO_ESC_5_11_0;
|
|
|
4449 else if (c == '1') iso->esc = ISO_ESC_5_11_1;
|
|
|
4450 else if (c == '2') iso->esc = ISO_ESC_5_11_2;
|
|
|
4451 else return 0;
|
|
|
4452 goto not_done;
|
|
|
4453
|
|
|
4454 case ISO_ESC_5_11_0:
|
|
|
4455 if (c == ']')
|
|
|
4456 {
|
|
|
4457 *flags &= (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4458 goto directionality;
|
|
|
4459 }
|
|
|
4460 return 0;
|
|
|
4461
|
|
|
4462 case ISO_ESC_5_11_1:
|
|
|
4463 if (c == ']')
|
|
|
4464 {
|
|
|
4465 *flags = (CODING_STATE_ISO2022_LOCK & ~CODING_STATE_R2L);
|
|
|
4466 goto directionality;
|
|
|
4467 }
|
|
|
4468 return 0;
|
|
|
4469
|
|
|
4470 case ISO_ESC_5_11_2:
|
|
|
4471 if (c == ']')
|
|
|
4472 {
|
|
|
4473 *flags = (*flags & CODING_STATE_ISO2022_LOCK) | CODING_STATE_R2L;
|
|
|
4474 goto directionality;
|
|
|
4475 }
|
|
|
4476 return 0;
|
|
|
4477
|
|
|
4478 directionality:
|
|
|
4479 iso->esc = ISO_ESC_DIRECTIONALITY;
|
|
|
4480 /* Various junk here to attempt to preserve the direction sequences
|
|
|
4481 literally in the text if they would otherwise be swallowed due
|
|
|
4482 to invalid designations that don't show up as actual charset
|
|
|
4483 changes in the text. */
|
|
|
4484 if (iso->invalid_switch_dir)
|
|
|
4485 {
|
|
|
4486 /* We already inserted a direction switch literally into the
|
|
|
4487 text. We assume (#### this may not be right) that the
|
|
|
4488 next direction switch is the one going the other way,
|
|
|
4489 and we need to output that literally as well. */
|
|
|
4490 iso->output_literally = 1;
|
|
|
4491 iso->invalid_switch_dir = 0;
|
|
|
4492 }
|
|
|
4493 else
|
|
|
4494 {
|
|
|
4495 int jj;
|
|
|
4496
|
|
|
4497 /* If we are in the thrall of an invalid designation,
|
|
|
4498 then stick the directionality sequence literally into the
|
|
|
4499 output stream so it ends up in the original text again. */
|
|
|
4500 for (jj = 0; jj < 4; jj++)
|
|
|
4501 if (iso->invalid_designated[jj])
|
|
|
4502 break;
|
|
|
4503 if (jj < 4)
|
|
|
4504 {
|
|
|
4505 iso->output_literally = 1;
|
|
|
4506 iso->invalid_switch_dir = 1;
|
|
|
4507 }
|
|
|
4508 else
|
|
|
4509 /* Indicate that we haven't yet seen a valid designation,
|
|
|
4510 so that if a switch-dir is directly followed by an
|
|
|
4511 invalid designation, both get inserted literally. */
|
|
|
4512 iso->switched_dir_and_no_valid_charset_yet = 1;
|
|
|
4513 }
|
|
|
4514 return 1;
|
|
|
4515
|
|
|
4516
|
|
|
4517 /**** designation ****/
|
|
|
4518
|
|
|
4519 case ISO_ESC_2_4:
|
|
|
4520 if (0x28 <= c && c <= 0x2F)
|
|
|
4521 {
|
|
|
4522 iso->esc = (enum iso_esc_flag) (c - 0x28 + ISO_ESC_2_4_8);
|
|
|
4523 goto not_done;
|
|
|
4524 }
|
|
|
4525 if (0x40 <= c && c <= 0x42)
|
|
|
4526 {
|
|
|
4527 cs = CHARSET_BY_ATTRIBUTES (CHARSET_TYPE_94X94, c,
|
|
|
4528 *flags & CODING_STATE_R2L ?
|
|
|
4529 CHARSET_RIGHT_TO_LEFT :
|
|
|
4530 CHARSET_LEFT_TO_RIGHT);
|
|
|
4531 reg = 0;
|
|
|
4532 goto designated;
|
|
|
4533 }
|
|
|
4534 return 0;
|
|
|
4535
|
|
|
4536 default:
|
|
|
4537 {
|
|
|
4538 int type =-1;
|
|
|
4539
|
|
|
4540 if (c < '0' || c > '~')
|
|
|
4541 return 0; /* bad final byte */
|
|
|
4542
|
|
|
4543 if (iso->esc >= ISO_ESC_2_8 &&
|
|
|
4544 iso->esc <= ISO_ESC_2_15)
|
|
|
4545 {
|
|
|
4546 type = ((iso->esc >= ISO_ESC_2_12) ?
|
|
|
4547 CHARSET_TYPE_96 : CHARSET_TYPE_94);
|
|
|
4548 reg = (iso->esc - ISO_ESC_2_8) & 3;
|
|
|
4549 }
|
|
|
4550 else if (iso->esc >= ISO_ESC_2_4_8 &&
|
|
|
4551 iso->esc <= ISO_ESC_2_4_15)
|
|
|
4552 {
|
|
|
4553 type = ((iso->esc >= ISO_ESC_2_4_12) ?
|
|
|
4554 CHARSET_TYPE_96X96 : CHARSET_TYPE_94X94);
|
|
|
4555 reg = (iso->esc - ISO_ESC_2_4_8) & 3;
|
|
|
4556 }
|
|
|
4557 else
|
|
|
4558 {
|
|
|
4559 /* Can this ever be reached? -slb */
|
|
|
4560 abort();
|
|
442
|
4561 return 0;
|
|
428
|
4562 }
|
|
|
4563
|
|
|
4564 cs = CHARSET_BY_ATTRIBUTES (type, c,
|
|
|
4565 *flags & CODING_STATE_R2L ?
|
|
|
4566 CHARSET_RIGHT_TO_LEFT :
|
|
|
4567 CHARSET_LEFT_TO_RIGHT);
|
|
|
4568 goto designated;
|
|
|
4569 }
|
|
|
4570 }
|
|
|
4571
|
|
|
4572 not_done:
|
|
|
4573 iso->esc_bytes[iso->esc_bytes_index++] = (unsigned char) c;
|
|
|
4574 return -1;
|
|
|
4575
|
|
|
4576 single_shift:
|
|
|
4577 if (check_invalid_charsets && !CHARSETP (iso->charset[reg]))
|
|
|
4578 /* can't invoke something that ain't there. */
|
|
|
4579 return 0;
|
|
|
4580 iso->esc = ISO_ESC_SINGLE_SHIFT;
|
|
|
4581 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4582 if (reg == 2)
|
|
|
4583 *flags |= CODING_STATE_SS2;
|
|
|
4584 else
|
|
|
4585 *flags |= CODING_STATE_SS3;
|
|
|
4586 return 1;
|
|
|
4587
|
|
|
4588 locking_shift:
|
|
|
4589 if (check_invalid_charsets &&
|
|
|
4590 !CHARSETP (iso->charset[reg]))
|
|
|
4591 /* can't invoke something that ain't there. */
|
|
|
4592 return 0;
|
|
|
4593 if (half)
|
|
|
4594 iso->register_right = reg;
|
|
|
4595 else
|
|
|
4596 iso->register_left = reg;
|
|
|
4597 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4598 iso->esc = ISO_ESC_LOCKING_SHIFT;
|
|
|
4599 return 1;
|
|
|
4600
|
|
|
4601 designated:
|
|
|
4602 if (NILP (cs) && check_invalid_charsets)
|
|
|
4603 {
|
|
|
4604 iso->invalid_designated[reg] = 1;
|
|
|
4605 iso->charset[reg] = Vcharset_ascii;
|
|
|
4606 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4607 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4608 iso->output_literally = 1;
|
|
|
4609 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4610 {
|
|
|
4611 /* We encountered a switch-direction followed by an
|
|
|
4612 invalid designation. Ensure that the switch-direction
|
|
|
4613 gets outputted; otherwise it will probably get eaten
|
|
|
4614 when the text is written out again. */
|
|
|
4615 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4616 iso->output_direction_sequence = 1;
|
|
|
4617 /* And make sure that the switch-dir going the other
|
|
|
4618 way gets outputted, as well. */
|
|
|
4619 iso->invalid_switch_dir = 1;
|
|
|
4620 }
|
|
|
4621 return 1;
|
|
|
4622 }
|
|
|
4623 /* This function is called with CODESYS equal to nil when
|
|
|
4624 doing coding-system detection. */
|
|
|
4625 if (!NILP (codesys))
|
|
|
4626 {
|
|
|
4627 charset_conversion_spec_dynarr *dyn =
|
|
|
4628 XCODING_SYSTEM (codesys)->iso2022.input_conv;
|
|
|
4629
|
|
|
4630 if (dyn)
|
|
|
4631 {
|
|
|
4632 int i;
|
|
|
4633
|
|
|
4634 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
4635 {
|
|
|
4636 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
4637 if (EQ (cs, spec->from_charset))
|
|
|
4638 cs = spec->to_charset;
|
|
|
4639 }
|
|
|
4640 }
|
|
|
4641 }
|
|
|
4642
|
|
|
4643 iso->charset[reg] = cs;
|
|
|
4644 iso->esc = ISO_ESC_DESIGNATE;
|
|
|
4645 *flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4646 if (iso->invalid_designated[reg])
|
|
|
4647 {
|
|
|
4648 iso->invalid_designated[reg] = 0;
|
|
|
4649 iso->output_literally = 1;
|
|
|
4650 }
|
|
|
4651 if (iso->switched_dir_and_no_valid_charset_yet)
|
|
|
4652 iso->switched_dir_and_no_valid_charset_yet = 0;
|
|
|
4653 return 1;
|
|
|
4654 }
|
|
|
4655
|
|
|
4656 static int
|
|
442
|
4657 detect_coding_iso2022 (struct detection_state *st, const unsigned char *src,
|
|
428
|
4658 unsigned int n)
|
|
|
4659 {
|
|
|
4660 int mask;
|
|
|
4661
|
|
|
4662 /* #### There are serious deficiencies in the recognition mechanism
|
|
|
4663 here. This needs to be much smarter if it's going to cut it.
|
|
|
4664 The sequence "\xff\x0f" is currently detected as LOCK_SHIFT while
|
|
|
4665 it should be detected as Latin-1.
|
|
|
4666 All the ISO2022 stuff in this file should be synced up with the
|
|
|
4667 code from FSF Emacs-20.4, in which Mule should be more or less stable.
|
|
|
4668 Perhaps we should wait till R2L works in FSF Emacs? */
|
|
|
4669
|
|
|
4670 if (!st->iso2022.initted)
|
|
|
4671 {
|
|
|
4672 reset_iso2022 (Qnil, &st->iso2022.iso);
|
|
|
4673 st->iso2022.mask = (CODING_CATEGORY_ISO_7_MASK |
|
|
|
4674 CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4675 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4676 CODING_CATEGORY_ISO_8_2_MASK |
|
|
|
4677 CODING_CATEGORY_ISO_LOCK_SHIFT_MASK);
|
|
|
4678 st->iso2022.flags = 0;
|
|
|
4679 st->iso2022.high_byte_count = 0;
|
|
|
4680 st->iso2022.saw_single_shift = 0;
|
|
|
4681 st->iso2022.initted = 1;
|
|
|
4682 }
|
|
|
4683
|
|
|
4684 mask = st->iso2022.mask;
|
|
|
4685
|
|
|
4686 while (n--)
|
|
|
4687 {
|
|
|
4688 int c = *src++;
|
|
|
4689 if (c >= 0xA0)
|
|
|
4690 {
|
|
|
4691 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4692 st->iso2022.high_byte_count++;
|
|
|
4693 }
|
|
|
4694 else
|
|
|
4695 {
|
|
|
4696 if (st->iso2022.high_byte_count && !st->iso2022.saw_single_shift)
|
|
|
4697 {
|
|
|
4698 if (st->iso2022.high_byte_count & 1)
|
|
|
4699 /* odd number of high bytes; assume not iso-8-2 */
|
|
|
4700 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4701 }
|
|
|
4702 st->iso2022.high_byte_count = 0;
|
|
|
4703 st->iso2022.saw_single_shift = 0;
|
|
|
4704 if (c > 0x80)
|
|
|
4705 mask &= ~CODING_CATEGORY_ISO_7_MASK;
|
|
|
4706 }
|
|
|
4707 if (!(st->iso2022.flags & CODING_STATE_ESCAPE)
|
|
|
4708 && (BYTE_C0_P (c) || BYTE_C1_P (c)))
|
|
|
4709 { /* control chars */
|
|
|
4710 switch (c)
|
|
|
4711 {
|
|
|
4712 /* Allow and ignore control characters that you might
|
|
|
4713 reasonably see in a text file */
|
|
|
4714 case '\r':
|
|
|
4715 case '\n':
|
|
|
4716 case '\t':
|
|
|
4717 case 7: /* bell */
|
|
|
4718 case 8: /* backspace */
|
|
|
4719 case 11: /* vertical tab */
|
|
|
4720 case 12: /* form feed */
|
|
|
4721 case 26: /* MS-DOS C-z junk */
|
|
|
4722 case 31: /* '^_' -- for info */
|
|
|
4723 goto label_continue_loop;
|
|
|
4724
|
|
|
4725 default:
|
|
|
4726 break;
|
|
|
4727 }
|
|
|
4728 }
|
|
|
4729
|
|
|
4730 if ((st->iso2022.flags & CODING_STATE_ESCAPE) || BYTE_C0_P (c)
|
|
|
4731 || BYTE_C1_P (c))
|
|
|
4732 {
|
|
|
4733 if (parse_iso2022_esc (Qnil, &st->iso2022.iso, c,
|
|
|
4734 &st->iso2022.flags, 0))
|
|
|
4735 {
|
|
|
4736 switch (st->iso2022.iso.esc)
|
|
|
4737 {
|
|
|
4738 case ISO_ESC_DESIGNATE:
|
|
|
4739 mask &= ~CODING_CATEGORY_ISO_8_1_MASK;
|
|
|
4740 mask &= ~CODING_CATEGORY_ISO_8_2_MASK;
|
|
|
4741 break;
|
|
|
4742 case ISO_ESC_LOCKING_SHIFT:
|
|
|
4743 mask = CODING_CATEGORY_ISO_LOCK_SHIFT_MASK;
|
|
|
4744 goto ran_out_of_chars;
|
|
|
4745 case ISO_ESC_SINGLE_SHIFT:
|
|
|
4746 mask &= ~CODING_CATEGORY_ISO_8_DESIGNATE_MASK;
|
|
|
4747 st->iso2022.saw_single_shift = 1;
|
|
|
4748 break;
|
|
|
4749 default:
|
|
|
4750 break;
|
|
|
4751 }
|
|
|
4752 }
|
|
|
4753 else
|
|
|
4754 {
|
|
|
4755 mask = 0;
|
|
|
4756 goto ran_out_of_chars;
|
|
|
4757 }
|
|
|
4758 }
|
|
|
4759 label_continue_loop:;
|
|
|
4760 }
|
|
|
4761
|
|
|
4762 ran_out_of_chars:
|
|
|
4763
|
|
|
4764 return mask;
|
|
|
4765 }
|
|
|
4766
|
|
|
4767 static int
|
|
|
4768 postprocess_iso2022_mask (int mask)
|
|
|
4769 {
|
|
|
4770 /* #### kind of cheesy */
|
|
|
4771 /* If seven-bit ISO is allowed, then assume that the encoding is
|
|
|
4772 entirely seven-bit and turn off the eight-bit ones. */
|
|
|
4773 if (mask & CODING_CATEGORY_ISO_7_MASK)
|
|
|
4774 mask &= ~ (CODING_CATEGORY_ISO_8_DESIGNATE_MASK |
|
|
|
4775 CODING_CATEGORY_ISO_8_1_MASK |
|
|
|
4776 CODING_CATEGORY_ISO_8_2_MASK);
|
|
|
4777 return mask;
|
|
|
4778 }
|
|
|
4779
|
|
|
4780 /* If FLAGS is a null pointer or specifies right-to-left motion,
|
|
|
4781 output a switch-dir-to-left-to-right sequence to DST.
|
|
|
4782 Also update FLAGS if it is not a null pointer.
|
|
|
4783 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4784 need to handle the CSI differently. */
|
|
|
4785
|
|
|
4786 static void
|
|
|
4787 restore_left_to_right_direction (Lisp_Coding_System *codesys,
|
|
|
4788 unsigned_char_dynarr *dst,
|
|
|
4789 unsigned int *flags,
|
|
|
4790 int internal_p)
|
|
|
4791 {
|
|
|
4792 if (!flags || (*flags & CODING_STATE_R2L))
|
|
|
4793 {
|
|
|
4794 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4795 {
|
|
|
4796 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4797 Dynarr_add (dst, '[');
|
|
|
4798 }
|
|
|
4799 else if (internal_p)
|
|
|
4800 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4801 else
|
|
|
4802 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4803 Dynarr_add (dst, '0');
|
|
|
4804 Dynarr_add (dst, ']');
|
|
|
4805 if (flags)
|
|
|
4806 *flags &= ~CODING_STATE_R2L;
|
|
|
4807 }
|
|
|
4808 }
|
|
|
4809
|
|
|
4810 /* If FLAGS is a null pointer or specifies a direction different from
|
|
|
4811 DIRECTION (which should be either CHARSET_RIGHT_TO_LEFT or
|
|
|
4812 CHARSET_LEFT_TO_RIGHT), output the appropriate switch-dir escape
|
|
|
4813 sequence to DST. Also update FLAGS if it is not a null pointer.
|
|
|
4814 If INTERNAL_P is set, we are outputting in internal format and
|
|
|
4815 need to handle the CSI differently. */
|
|
|
4816
|
|
|
4817 static void
|
|
|
4818 ensure_correct_direction (int direction, Lisp_Coding_System *codesys,
|
|
|
4819 unsigned_char_dynarr *dst, unsigned int *flags,
|
|
|
4820 int internal_p)
|
|
|
4821 {
|
|
|
4822 if ((!flags || (*flags & CODING_STATE_R2L)) &&
|
|
|
4823 direction == CHARSET_LEFT_TO_RIGHT)
|
|
|
4824 restore_left_to_right_direction (codesys, dst, flags, internal_p);
|
|
|
4825 else if (!CODING_SYSTEM_ISO2022_NO_ISO6429 (codesys)
|
|
|
4826 && (!flags || !(*flags & CODING_STATE_R2L)) &&
|
|
|
4827 direction == CHARSET_RIGHT_TO_LEFT)
|
|
|
4828 {
|
|
|
4829 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
4830 {
|
|
|
4831 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
4832 Dynarr_add (dst, '[');
|
|
|
4833 }
|
|
|
4834 else if (internal_p)
|
|
|
4835 DECODE_ADD_BINARY_CHAR (ISO_CODE_CSI, dst);
|
|
|
4836 else
|
|
|
4837 Dynarr_add (dst, ISO_CODE_CSI);
|
|
|
4838 Dynarr_add (dst, '2');
|
|
|
4839 Dynarr_add (dst, ']');
|
|
|
4840 if (flags)
|
|
|
4841 *flags |= CODING_STATE_R2L;
|
|
|
4842 }
|
|
|
4843 }
|
|
|
4844
|
|
|
4845 /* Convert ISO2022-format data to internal format. */
|
|
|
4846
|
|
|
4847 static void
|
|
442
|
4848 decode_coding_iso2022 (Lstream *decoding, const unsigned char *src,
|
|
428
|
4849 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
4850 {
|
|
|
4851 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
4852 unsigned int flags = str->flags;
|
|
|
4853 unsigned int ch = str->ch;
|
|
|
4854 eol_type_t eol_type = str->eol_type;
|
|
|
4855 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4856 unsigned_char_dynarr *real_dst = dst;
|
|
|
4857 #endif
|
|
|
4858 Lisp_Object coding_system;
|
|
|
4859
|
|
|
4860 XSETCODING_SYSTEM (coding_system, str->codesys);
|
|
|
4861
|
|
|
4862 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4863 if (flags & CODING_STATE_COMPOSITE)
|
|
|
4864 dst = str->iso2022.composite_chars;
|
|
|
4865 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4866
|
|
|
4867 while (n--)
|
|
|
4868 {
|
|
|
4869 unsigned char c = *src++;
|
|
|
4870 if (flags & CODING_STATE_ESCAPE)
|
|
|
4871 { /* Within ESC sequence */
|
|
|
4872 int retval = parse_iso2022_esc (coding_system, &str->iso2022,
|
|
|
4873 c, &flags, 1);
|
|
|
4874
|
|
|
4875 if (retval)
|
|
|
4876 {
|
|
|
4877 switch (str->iso2022.esc)
|
|
|
4878 {
|
|
|
4879 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4880 case ISO_ESC_START_COMPOSITE:
|
|
|
4881 if (str->iso2022.composite_chars)
|
|
|
4882 Dynarr_reset (str->iso2022.composite_chars);
|
|
|
4883 else
|
|
|
4884 str->iso2022.composite_chars = Dynarr_new (unsigned_char);
|
|
|
4885 dst = str->iso2022.composite_chars;
|
|
|
4886 break;
|
|
|
4887 case ISO_ESC_END_COMPOSITE:
|
|
|
4888 {
|
|
|
4889 Bufbyte comstr[MAX_EMCHAR_LEN];
|
|
|
4890 Bytecount len;
|
|
|
4891 Emchar emch = lookup_composite_char (Dynarr_atp (dst, 0),
|
|
|
4892 Dynarr_length (dst));
|
|
|
4893 dst = real_dst;
|
|
|
4894 len = set_charptr_emchar (comstr, emch);
|
|
|
4895 Dynarr_add_many (dst, comstr, len);
|
|
|
4896 break;
|
|
|
4897 }
|
|
|
4898 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4899
|
|
|
4900 case ISO_ESC_LITERAL:
|
|
|
4901 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4902 break;
|
|
|
4903
|
|
|
4904 default:
|
|
|
4905 /* Everything else handled already */
|
|
|
4906 break;
|
|
|
4907 }
|
|
|
4908 }
|
|
|
4909
|
|
|
4910 /* Attempted error recovery. */
|
|
|
4911 if (str->iso2022.output_direction_sequence)
|
|
|
4912 ensure_correct_direction (flags & CODING_STATE_R2L ?
|
|
|
4913 CHARSET_RIGHT_TO_LEFT :
|
|
|
4914 CHARSET_LEFT_TO_RIGHT,
|
|
|
4915 str->codesys, dst, 0, 1);
|
|
|
4916 /* More error recovery. */
|
|
|
4917 if (!retval || str->iso2022.output_literally)
|
|
|
4918 {
|
|
|
4919 /* Output the (possibly invalid) sequence */
|
|
|
4920 int i;
|
|
|
4921 for (i = 0; i < str->iso2022.esc_bytes_index; i++)
|
|
|
4922 DECODE_ADD_BINARY_CHAR (str->iso2022.esc_bytes[i], dst);
|
|
|
4923 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4924 if (!retval)
|
|
|
4925 n++, src--;/* Repeat the loop with the same character. */
|
|
|
4926 else
|
|
|
4927 {
|
|
|
4928 /* No sense in reprocessing the final byte of the
|
|
|
4929 escape sequence; it could mess things up anyway.
|
|
|
4930 Just add it now. */
|
|
|
4931 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4932 }
|
|
|
4933 }
|
|
|
4934 ch = 0;
|
|
|
4935 }
|
|
|
4936 else if (BYTE_C0_P (c) || BYTE_C1_P (c))
|
|
|
4937 { /* Control characters */
|
|
|
4938
|
|
|
4939 /***** Error-handling *****/
|
|
|
4940
|
|
|
4941 /* If we were in the middle of a character, dump out the
|
|
|
4942 partial character. */
|
|
|
4943 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4944
|
|
|
4945 /* If we just saw a single-shift character, dump it out.
|
|
|
4946 This may dump out the wrong sort of single-shift character,
|
|
|
4947 but least it will give an indication that something went
|
|
|
4948 wrong. */
|
|
|
4949 if (flags & CODING_STATE_SS2)
|
|
|
4950 {
|
|
|
4951 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS2, dst);
|
|
|
4952 flags &= ~CODING_STATE_SS2;
|
|
|
4953 }
|
|
|
4954 if (flags & CODING_STATE_SS3)
|
|
|
4955 {
|
|
|
4956 DECODE_ADD_BINARY_CHAR (ISO_CODE_SS3, dst);
|
|
|
4957 flags &= ~CODING_STATE_SS3;
|
|
|
4958 }
|
|
|
4959
|
|
|
4960 /***** Now handle the control characters. *****/
|
|
|
4961
|
|
|
4962 /* Handle CR/LF */
|
|
|
4963 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4964
|
|
|
4965 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
4966
|
|
|
4967 if (!parse_iso2022_esc (coding_system, &str->iso2022, c, &flags, 1))
|
|
|
4968 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4969 }
|
|
|
4970 else
|
|
|
4971 { /* Graphic characters */
|
|
|
4972 Lisp_Object charset;
|
|
|
4973 int lb;
|
|
|
4974 int reg;
|
|
|
4975
|
|
|
4976 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
4977
|
|
|
4978 /* Now determine the charset. */
|
|
|
4979 reg = ((flags & CODING_STATE_SS2) ? 2
|
|
|
4980 : (flags & CODING_STATE_SS3) ? 3
|
|
|
4981 : !BYTE_ASCII_P (c) ? str->iso2022.register_right
|
|
|
4982 : str->iso2022.register_left);
|
|
|
4983 charset = str->iso2022.charset[reg];
|
|
|
4984
|
|
|
4985 /* Error checking: */
|
|
|
4986 if (! CHARSETP (charset)
|
|
|
4987 || str->iso2022.invalid_designated[reg]
|
|
|
4988 || (((c & 0x7F) == ' ' || (c & 0x7F) == ISO_CODE_DEL)
|
|
|
4989 && XCHARSET_CHARS (charset) == 94))
|
|
|
4990 /* Mrmph. We are trying to invoke a register that has no
|
|
|
4991 or an invalid charset in it, or trying to add a character
|
|
|
4992 outside the range of the charset. Insert that char literally
|
|
|
4993 to preserve it for the output. */
|
|
|
4994 {
|
|
|
4995 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
4996 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
4997 }
|
|
|
4998
|
|
|
4999 else
|
|
|
5000 {
|
|
|
5001 /* Things are probably hunky-dorey. */
|
|
|
5002
|
|
|
5003 /* Fetch reverse charset, maybe. */
|
|
|
5004 if (((flags & CODING_STATE_R2L) &&
|
|
|
5005 XCHARSET_DIRECTION (charset) == CHARSET_LEFT_TO_RIGHT)
|
|
|
5006 ||
|
|
|
5007 (!(flags & CODING_STATE_R2L) &&
|
|
|
5008 XCHARSET_DIRECTION (charset) == CHARSET_RIGHT_TO_LEFT))
|
|
|
5009 {
|
|
|
5010 Lisp_Object new_charset =
|
|
|
5011 XCHARSET_REVERSE_DIRECTION_CHARSET (charset);
|
|
|
5012 if (!NILP (new_charset))
|
|
|
5013 charset = new_charset;
|
|
|
5014 }
|
|
|
5015
|
|
|
5016 lb = XCHARSET_LEADING_BYTE (charset);
|
|
|
5017 switch (XCHARSET_REP_BYTES (charset))
|
|
|
5018 {
|
|
|
5019 case 1: /* ASCII */
|
|
|
5020 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5021 Dynarr_add (dst, c & 0x7F);
|
|
|
5022 break;
|
|
|
5023
|
|
|
5024 case 2: /* one-byte official */
|
|
|
5025 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5026 Dynarr_add (dst, lb);
|
|
|
5027 Dynarr_add (dst, c | 0x80);
|
|
|
5028 break;
|
|
|
5029
|
|
|
5030 case 3: /* one-byte private or two-byte official */
|
|
|
5031 if (XCHARSET_PRIVATE_P (charset))
|
|
|
5032 {
|
|
|
5033 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5034 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_1);
|
|
|
5035 Dynarr_add (dst, lb);
|
|
|
5036 Dynarr_add (dst, c | 0x80);
|
|
|
5037 }
|
|
|
5038 else
|
|
|
5039 {
|
|
|
5040 if (ch)
|
|
|
5041 {
|
|
|
5042 Dynarr_add (dst, lb);
|
|
|
5043 Dynarr_add (dst, ch | 0x80);
|
|
|
5044 Dynarr_add (dst, c | 0x80);
|
|
|
5045 ch = 0;
|
|
|
5046 }
|
|
|
5047 else
|
|
|
5048 ch = c;
|
|
|
5049 }
|
|
|
5050 break;
|
|
|
5051
|
|
|
5052 default: /* two-byte private */
|
|
|
5053 if (ch)
|
|
|
5054 {
|
|
|
5055 Dynarr_add (dst, PRE_LEADING_BYTE_PRIVATE_2);
|
|
|
5056 Dynarr_add (dst, lb);
|
|
|
5057 Dynarr_add (dst, ch | 0x80);
|
|
|
5058 Dynarr_add (dst, c | 0x80);
|
|
|
5059 ch = 0;
|
|
|
5060 }
|
|
|
5061 else
|
|
|
5062 ch = c;
|
|
|
5063 }
|
|
|
5064 }
|
|
|
5065
|
|
|
5066 if (!ch)
|
|
|
5067 flags &= CODING_STATE_ISO2022_LOCK;
|
|
|
5068 }
|
|
|
5069
|
|
|
5070 label_continue_loop:;
|
|
|
5071 }
|
|
|
5072
|
|
|
5073 if (flags & CODING_STATE_END)
|
|
|
5074 DECODE_OUTPUT_PARTIAL_CHAR (ch);
|
|
|
5075
|
|
|
5076 str->flags = flags;
|
|
|
5077 str->ch = ch;
|
|
|
5078 }
|
|
|
5079
|
|
|
5080
|
|
|
5081 /***** ISO2022 encoder *****/
|
|
|
5082
|
|
|
5083 /* Designate CHARSET into register REG. */
|
|
|
5084
|
|
|
5085 static void
|
|
|
5086 iso2022_designate (Lisp_Object charset, unsigned char reg,
|
|
|
5087 struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5088 {
|
|
442
|
5089 static const char inter94[] = "()*+";
|
|
|
5090 static const char inter96[] = ",-./";
|
|
428
|
5091 unsigned int type;
|
|
|
5092 unsigned char final;
|
|
|
5093 Lisp_Object old_charset = str->iso2022.charset[reg];
|
|
|
5094
|
|
|
5095 str->iso2022.charset[reg] = charset;
|
|
|
5096 if (!CHARSETP (charset))
|
|
|
5097 /* charset might be an initial nil or t. */
|
|
|
5098 return;
|
|
|
5099 type = XCHARSET_TYPE (charset);
|
|
|
5100 final = XCHARSET_FINAL (charset);
|
|
|
5101 if (!str->iso2022.force_charset_on_output[reg] &&
|
|
|
5102 CHARSETP (old_charset) &&
|
|
|
5103 XCHARSET_TYPE (old_charset) == type &&
|
|
|
5104 XCHARSET_FINAL (old_charset) == final)
|
|
|
5105 return;
|
|
|
5106
|
|
|
5107 str->iso2022.force_charset_on_output[reg] = 0;
|
|
|
5108
|
|
|
5109 {
|
|
|
5110 charset_conversion_spec_dynarr *dyn =
|
|
|
5111 str->codesys->iso2022.output_conv;
|
|
|
5112
|
|
|
5113 if (dyn)
|
|
|
5114 {
|
|
|
5115 int i;
|
|
|
5116
|
|
|
5117 for (i = 0; i < Dynarr_length (dyn); i++)
|
|
|
5118 {
|
|
|
5119 struct charset_conversion_spec *spec = Dynarr_atp (dyn, i);
|
|
|
5120 if (EQ (charset, spec->from_charset))
|
|
|
5121 charset = spec->to_charset;
|
|
|
5122 }
|
|
|
5123 }
|
|
|
5124 }
|
|
|
5125
|
|
|
5126 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5127 switch (type)
|
|
|
5128 {
|
|
|
5129 case CHARSET_TYPE_94:
|
|
|
5130 Dynarr_add (dst, inter94[reg]);
|
|
|
5131 break;
|
|
|
5132 case CHARSET_TYPE_96:
|
|
|
5133 Dynarr_add (dst, inter96[reg]);
|
|
|
5134 break;
|
|
|
5135 case CHARSET_TYPE_94X94:
|
|
|
5136 Dynarr_add (dst, '$');
|
|
|
5137 if (reg != 0
|
|
|
5138 || !(CODING_SYSTEM_ISO2022_SHORT (str->codesys))
|
|
|
5139 || final < '@'
|
|
|
5140 || final > 'B')
|
|
|
5141 Dynarr_add (dst, inter94[reg]);
|
|
|
5142 break;
|
|
|
5143 case CHARSET_TYPE_96X96:
|
|
|
5144 Dynarr_add (dst, '$');
|
|
|
5145 Dynarr_add (dst, inter96[reg]);
|
|
|
5146 break;
|
|
|
5147 }
|
|
|
5148 Dynarr_add (dst, final);
|
|
|
5149 }
|
|
|
5150
|
|
|
5151 static void
|
|
|
5152 ensure_normal_shift (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5153 {
|
|
|
5154 if (str->iso2022.register_left != 0)
|
|
|
5155 {
|
|
|
5156 Dynarr_add (dst, ISO_CODE_SI);
|
|
|
5157 str->iso2022.register_left = 0;
|
|
|
5158 }
|
|
|
5159 }
|
|
|
5160
|
|
|
5161 static void
|
|
|
5162 ensure_shift_out (struct encoding_stream *str, unsigned_char_dynarr *dst)
|
|
|
5163 {
|
|
|
5164 if (str->iso2022.register_left != 1)
|
|
|
5165 {
|
|
|
5166 Dynarr_add (dst, ISO_CODE_SO);
|
|
|
5167 str->iso2022.register_left = 1;
|
|
|
5168 }
|
|
|
5169 }
|
|
|
5170
|
|
|
5171 /* Convert internally-formatted data to ISO2022 format. */
|
|
|
5172
|
|
|
5173 static void
|
|
442
|
5174 encode_coding_iso2022 (Lstream *encoding, const unsigned char *src,
|
|
428
|
5175 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5176 {
|
|
|
5177 unsigned char charmask, c;
|
|
|
5178 unsigned char char_boundary;
|
|
|
5179 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
5180 unsigned int flags = str->flags;
|
|
|
5181 unsigned int ch = str->ch;
|
|
|
5182 Lisp_Coding_System *codesys = str->codesys;
|
|
|
5183 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
5184 int i;
|
|
|
5185 Lisp_Object charset;
|
|
|
5186 int half;
|
|
|
5187
|
|
|
5188 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5189 /* flags for handling composite chars. We do a little switcharoo
|
|
|
5190 on the source while we're outputting the composite char. */
|
|
|
5191 unsigned int saved_n = 0;
|
|
442
|
5192 const unsigned char *saved_src = NULL;
|
|
428
|
5193 int in_composite = 0;
|
|
|
5194 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5195
|
|
|
5196 char_boundary = str->iso2022.current_char_boundary;
|
|
|
5197 charset = str->iso2022.current_charset;
|
|
|
5198 half = str->iso2022.current_half;
|
|
|
5199
|
|
|
5200 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5201 back_to_square_n:
|
|
|
5202 #endif
|
|
|
5203 while (n--)
|
|
|
5204 {
|
|
|
5205 c = *src++;
|
|
|
5206
|
|
|
5207 if (BYTE_ASCII_P (c))
|
|
|
5208 { /* Processing ASCII character */
|
|
|
5209 ch = 0;
|
|
|
5210
|
|
|
5211 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5212
|
|
|
5213 /* Make sure G0 contains ASCII */
|
|
|
5214 if ((c > ' ' && c < ISO_CODE_DEL) ||
|
|
|
5215 !CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (codesys))
|
|
|
5216 {
|
|
|
5217 ensure_normal_shift (str, dst);
|
|
|
5218 iso2022_designate (Vcharset_ascii, 0, str, dst);
|
|
|
5219 }
|
|
|
5220
|
|
|
5221 /* If necessary, restore everything to the default state
|
|
|
5222 at end-of-line */
|
|
|
5223 if (c == '\n' &&
|
|
|
5224 !(CODING_SYSTEM_ISO2022_NO_ASCII_EOL (codesys)))
|
|
|
5225 {
|
|
|
5226 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5227
|
|
|
5228 ensure_normal_shift (str, dst);
|
|
|
5229
|
|
|
5230 for (i = 0; i < 4; i++)
|
|
|
5231 {
|
|
|
5232 Lisp_Object initial_charset =
|
|
|
5233 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
5234 iso2022_designate (initial_charset, i, str, dst);
|
|
|
5235 }
|
|
|
5236 }
|
|
|
5237 if (c == '\n')
|
|
|
5238 {
|
|
|
5239 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
5240 Dynarr_add (dst, '\r');
|
|
|
5241 if (eol_type != EOL_CR)
|
|
|
5242 Dynarr_add (dst, c);
|
|
|
5243 }
|
|
|
5244 else
|
|
|
5245 {
|
|
|
5246 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
5247 && fit_to_be_escape_quoted (c))
|
|
|
5248 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5249 Dynarr_add (dst, c);
|
|
|
5250 }
|
|
|
5251 char_boundary = 1;
|
|
|
5252 }
|
|
|
5253
|
|
|
5254 else if (BUFBYTE_LEADING_BYTE_P (c) || BUFBYTE_LEADING_BYTE_P (ch))
|
|
|
5255 { /* Processing Leading Byte */
|
|
|
5256 ch = 0;
|
|
|
5257 charset = CHARSET_BY_LEADING_BYTE (c);
|
|
|
5258 if (LEADING_BYTE_PREFIX_P(c))
|
|
|
5259 ch = c;
|
|
|
5260 else if (!EQ (charset, Vcharset_control_1)
|
|
|
5261 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5262 && !EQ (charset, Vcharset_composite)
|
|
|
5263 #endif
|
|
|
5264 )
|
|
|
5265 {
|
|
|
5266 int reg;
|
|
|
5267
|
|
|
5268 ensure_correct_direction (XCHARSET_DIRECTION (charset),
|
|
|
5269 codesys, dst, &flags, 0);
|
|
|
5270
|
|
|
5271 /* Now determine which register to use. */
|
|
|
5272 reg = -1;
|
|
|
5273 for (i = 0; i < 4; i++)
|
|
|
5274 {
|
|
|
5275 if (EQ (charset, str->iso2022.charset[i]) ||
|
|
|
5276 EQ (charset,
|
|
|
5277 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i)))
|
|
|
5278 {
|
|
|
5279 reg = i;
|
|
|
5280 break;
|
|
|
5281 }
|
|
|
5282 }
|
|
|
5283
|
|
|
5284 if (reg == -1)
|
|
|
5285 {
|
|
|
5286 if (XCHARSET_GRAPHIC (charset) != 0)
|
|
|
5287 {
|
|
|
5288 if (!NILP (str->iso2022.charset[1]) &&
|
|
|
5289 (!CODING_SYSTEM_ISO2022_SEVEN (codesys) ||
|
|
|
5290 CODING_SYSTEM_ISO2022_LOCK_SHIFT (codesys)))
|
|
|
5291 reg = 1;
|
|
|
5292 else if (!NILP (str->iso2022.charset[2]))
|
|
|
5293 reg = 2;
|
|
|
5294 else if (!NILP (str->iso2022.charset[3]))
|
|
|
5295 reg = 3;
|
|
|
5296 else
|
|
|
5297 reg = 0;
|
|
|
5298 }
|
|
|
5299 else
|
|
|
5300 reg = 0;
|
|
|
5301 }
|
|
|
5302
|
|
|
5303 iso2022_designate (charset, reg, str, dst);
|
|
|
5304
|
|
|
5305 /* Now invoke that register. */
|
|
|
5306 switch (reg)
|
|
|
5307 {
|
|
|
5308 case 0:
|
|
|
5309 ensure_normal_shift (str, dst);
|
|
|
5310 half = 0;
|
|
|
5311 break;
|
|
|
5312
|
|
|
5313 case 1:
|
|
|
5314 if (CODING_SYSTEM_ISO2022_SEVEN (codesys))
|
|
|
5315 {
|
|
|
5316 ensure_shift_out (str, dst);
|
|
|
5317 half = 0;
|
|
|
5318 }
|
|
|
5319 else
|
|
|
5320 half = 1;
|
|
|
5321 break;
|
|
|
5322
|
|
|
5323 case 2:
|
|
|
5324 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5325 {
|
|
|
5326 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5327 Dynarr_add (dst, 'N');
|
|
|
5328 half = 0;
|
|
|
5329 }
|
|
|
5330 else
|
|
|
5331 {
|
|
|
5332 Dynarr_add (dst, ISO_CODE_SS2);
|
|
|
5333 half = 1;
|
|
|
5334 }
|
|
|
5335 break;
|
|
|
5336
|
|
|
5337 case 3:
|
|
|
5338 if (CODING_SYSTEM_ISO2022_SEVEN (str->codesys))
|
|
|
5339 {
|
|
|
5340 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5341 Dynarr_add (dst, 'O');
|
|
|
5342 half = 0;
|
|
|
5343 }
|
|
|
5344 else
|
|
|
5345 {
|
|
|
5346 Dynarr_add (dst, ISO_CODE_SS3);
|
|
|
5347 half = 1;
|
|
|
5348 }
|
|
|
5349 break;
|
|
|
5350
|
|
|
5351 default:
|
|
|
5352 abort ();
|
|
|
5353 }
|
|
|
5354 }
|
|
|
5355 char_boundary = 0;
|
|
|
5356 }
|
|
|
5357 else
|
|
|
5358 { /* Processing Non-ASCII character */
|
|
|
5359 charmask = (half == 0 ? 0x7F : 0xFF);
|
|
|
5360 char_boundary = 1;
|
|
|
5361 if (EQ (charset, Vcharset_control_1))
|
|
|
5362 {
|
|
|
5363 if (CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (codesys)
|
|
|
5364 && fit_to_be_escape_quoted (c))
|
|
|
5365 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5366 /* you asked for it ... */
|
|
|
5367 Dynarr_add (dst, c - 0x20);
|
|
|
5368 }
|
|
|
5369 else
|
|
|
5370 {
|
|
|
5371 switch (XCHARSET_REP_BYTES (charset))
|
|
|
5372 {
|
|
|
5373 case 2:
|
|
|
5374 Dynarr_add (dst, c & charmask);
|
|
|
5375 break;
|
|
|
5376 case 3:
|
|
|
5377 if (XCHARSET_PRIVATE_P (charset))
|
|
|
5378 {
|
|
|
5379 Dynarr_add (dst, c & charmask);
|
|
|
5380 ch = 0;
|
|
|
5381 }
|
|
|
5382 else if (ch)
|
|
|
5383 {
|
|
|
5384 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5385 if (EQ (charset, Vcharset_composite))
|
|
|
5386 {
|
|
|
5387 if (in_composite)
|
|
|
5388 {
|
|
|
5389 /* #### Bother! We don't know how to
|
|
|
5390 handle this yet. */
|
|
|
5391 Dynarr_add (dst, '~');
|
|
|
5392 }
|
|
|
5393 else
|
|
|
5394 {
|
|
|
5395 Emchar emch = MAKE_CHAR (Vcharset_composite,
|
|
|
5396 ch & 0x7F, c & 0x7F);
|
|
|
5397 Lisp_Object lstr = composite_char_string (emch);
|
|
|
5398 saved_n = n;
|
|
|
5399 saved_src = src;
|
|
|
5400 in_composite = 1;
|
|
|
5401 src = XSTRING_DATA (lstr);
|
|
|
5402 n = XSTRING_LENGTH (lstr);
|
|
|
5403 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5404 Dynarr_add (dst, '0'); /* start composing */
|
|
|
5405 }
|
|
|
5406 }
|
|
|
5407 else
|
|
|
5408 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5409 {
|
|
|
5410 Dynarr_add (dst, ch & charmask);
|
|
|
5411 Dynarr_add (dst, c & charmask);
|
|
|
5412 }
|
|
|
5413 ch = 0;
|
|
|
5414 }
|
|
|
5415 else
|
|
|
5416 {
|
|
|
5417 ch = c;
|
|
|
5418 char_boundary = 0;
|
|
|
5419 }
|
|
|
5420 break;
|
|
|
5421 case 4:
|
|
|
5422 if (ch)
|
|
|
5423 {
|
|
|
5424 Dynarr_add (dst, ch & charmask);
|
|
|
5425 Dynarr_add (dst, c & charmask);
|
|
|
5426 ch = 0;
|
|
|
5427 }
|
|
|
5428 else
|
|
|
5429 {
|
|
|
5430 ch = c;
|
|
|
5431 char_boundary = 0;
|
|
|
5432 }
|
|
|
5433 break;
|
|
|
5434 default:
|
|
|
5435 abort ();
|
|
|
5436 }
|
|
|
5437 }
|
|
|
5438 }
|
|
|
5439 }
|
|
|
5440
|
|
|
5441 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5442 if (in_composite)
|
|
|
5443 {
|
|
|
5444 n = saved_n;
|
|
|
5445 src = saved_src;
|
|
|
5446 in_composite = 0;
|
|
|
5447 Dynarr_add (dst, ISO_CODE_ESC);
|
|
|
5448 Dynarr_add (dst, '1'); /* end composing */
|
|
|
5449 goto back_to_square_n; /* Wheeeeeeeee ..... */
|
|
|
5450 }
|
|
|
5451 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5452
|
|
|
5453 if (char_boundary && flags & CODING_STATE_END)
|
|
|
5454 {
|
|
|
5455 restore_left_to_right_direction (codesys, dst, &flags, 0);
|
|
|
5456 ensure_normal_shift (str, dst);
|
|
|
5457 for (i = 0; i < 4; i++)
|
|
|
5458 {
|
|
|
5459 Lisp_Object initial_charset =
|
|
|
5460 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (codesys, i);
|
|
|
5461 iso2022_designate (initial_charset, i, str, dst);
|
|
|
5462 }
|
|
|
5463 }
|
|
|
5464
|
|
|
5465 str->flags = flags;
|
|
|
5466 str->ch = ch;
|
|
|
5467 str->iso2022.current_char_boundary = char_boundary;
|
|
|
5468 str->iso2022.current_charset = charset;
|
|
|
5469 str->iso2022.current_half = half;
|
|
|
5470
|
|
|
5471 /* Verbum caro factum est! */
|
|
|
5472 }
|
|
|
5473 #endif /* MULE */
|
|
|
5474
|
|
|
5475 /************************************************************************/
|
|
|
5476 /* No-conversion methods */
|
|
|
5477 /************************************************************************/
|
|
|
5478
|
|
|
5479 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
5480 contain all 256 possible byte values and that are not to be
|
|
|
5481 interpreted as being in any particular decoding. */
|
|
|
5482 static void
|
|
442
|
5483 decode_coding_no_conversion (Lstream *decoding, const unsigned char *src,
|
|
428
|
5484 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5485 {
|
|
|
5486 unsigned char c;
|
|
|
5487 struct decoding_stream *str = DECODING_STREAM_DATA (decoding);
|
|
|
5488 unsigned int flags = str->flags;
|
|
|
5489 unsigned int ch = str->ch;
|
|
|
5490 eol_type_t eol_type = str->eol_type;
|
|
|
5491
|
|
|
5492 while (n--)
|
|
|
5493 {
|
|
|
5494 c = *src++;
|
|
|
5495
|
|
|
5496 DECODE_HANDLE_EOL_TYPE (eol_type, c, flags, dst);
|
|
|
5497 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
5498 label_continue_loop:;
|
|
|
5499 }
|
|
|
5500
|
|
|
5501 DECODE_HANDLE_END_OF_CONVERSION (flags, ch, dst);
|
|
|
5502
|
|
|
5503 str->flags = flags;
|
|
|
5504 str->ch = ch;
|
|
|
5505 }
|
|
|
5506
|
|
|
5507 static void
|
|
442
|
5508 encode_coding_no_conversion (Lstream *encoding, const unsigned char *src,
|
|
428
|
5509 unsigned_char_dynarr *dst, unsigned int n)
|
|
|
5510 {
|
|
|
5511 unsigned char c;
|
|
|
5512 struct encoding_stream *str = ENCODING_STREAM_DATA (encoding);
|
|
|
5513 unsigned int flags = str->flags;
|
|
|
5514 unsigned int ch = str->ch;
|
|
|
5515 eol_type_t eol_type = CODING_SYSTEM_EOL_TYPE (str->codesys);
|
|
|
5516
|
|
|
5517 while (n--)
|
|
|
5518 {
|
|
|
5519 c = *src++;
|
|
|
5520 if (c == '\n')
|
|
|
5521 {
|
|
|
5522 if (eol_type != EOL_LF && eol_type != EOL_AUTODETECT)
|
|
|
5523 Dynarr_add (dst, '\r');
|
|
|
5524 if (eol_type != EOL_CR)
|
|
|
5525 Dynarr_add (dst, '\n');
|
|
|
5526 ch = 0;
|
|
|
5527 }
|
|
|
5528 else if (BYTE_ASCII_P (c))
|
|
|
5529 {
|
|
|
5530 assert (ch == 0);
|
|
|
5531 Dynarr_add (dst, c);
|
|
|
5532 }
|
|
|
5533 else if (BUFBYTE_LEADING_BYTE_P (c))
|
|
|
5534 {
|
|
|
5535 assert (ch == 0);
|
|
|
5536 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
5537 c == LEADING_BYTE_CONTROL_1)
|
|
|
5538 ch = c;
|
|
|
5539 else
|
|
|
5540 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
5541 }
|
|
|
5542 else
|
|
|
5543 {
|
|
|
5544 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
|
5545 Dynarr_add (dst, c);
|
|
|
5546 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
5547 {
|
|
|
5548 assert (c < 0xC0);
|
|
|
5549 Dynarr_add (dst, c - 0x20);
|
|
|
5550 }
|
|
|
5551 /* else it should be the second or third byte of an
|
|
|
5552 untranslatable character, so ignore it */
|
|
|
5553 ch = 0;
|
|
|
5554 }
|
|
|
5555 }
|
|
|
5556
|
|
|
5557 str->flags = flags;
|
|
|
5558 str->ch = ch;
|
|
|
5559 }
|
|
|
5560
|
|
|
5561
|
|
440
|
5562
|
|
428
|
5563 /************************************************************************/
|
|
|
5564 /* Initialization */
|
|
|
5565 /************************************************************************/
|
|
|
5566
|
|
|
5567 void
|
|
|
5568 syms_of_file_coding (void)
|
|
|
5569 {
|
|
442
|
5570 INIT_LRECORD_IMPLEMENTATION (coding_system);
|
|
|
5571
|
|
|
5572 DEFERROR_STANDARD (Qcoding_system_error, Qio_error);
|
|
428
|
5573
|
|
|
5574 DEFSUBR (Fcoding_system_p);
|
|
|
5575 DEFSUBR (Ffind_coding_system);
|
|
|
5576 DEFSUBR (Fget_coding_system);
|
|
|
5577 DEFSUBR (Fcoding_system_list);
|
|
|
5578 DEFSUBR (Fcoding_system_name);
|
|
|
5579 DEFSUBR (Fmake_coding_system);
|
|
|
5580 DEFSUBR (Fcopy_coding_system);
|
|
440
|
5581 DEFSUBR (Fcoding_system_canonical_name_p);
|
|
|
5582 DEFSUBR (Fcoding_system_alias_p);
|
|
|
5583 DEFSUBR (Fcoding_system_aliasee);
|
|
428
|
5584 DEFSUBR (Fdefine_coding_system_alias);
|
|
|
5585 DEFSUBR (Fsubsidiary_coding_system);
|
|
|
5586
|
|
|
5587 DEFSUBR (Fcoding_system_type);
|
|
|
5588 DEFSUBR (Fcoding_system_doc_string);
|
|
|
5589 #ifdef MULE
|
|
|
5590 DEFSUBR (Fcoding_system_charset);
|
|
|
5591 #endif
|
|
|
5592 DEFSUBR (Fcoding_system_property);
|
|
|
5593
|
|
|
5594 DEFSUBR (Fcoding_category_list);
|
|
|
5595 DEFSUBR (Fset_coding_priority_list);
|
|
|
5596 DEFSUBR (Fcoding_priority_list);
|
|
|
5597 DEFSUBR (Fset_coding_category_system);
|
|
|
5598 DEFSUBR (Fcoding_category_system);
|
|
|
5599
|
|
|
5600 DEFSUBR (Fdetect_coding_region);
|
|
|
5601 DEFSUBR (Fdecode_coding_region);
|
|
|
5602 DEFSUBR (Fencode_coding_region);
|
|
|
5603 #ifdef MULE
|
|
|
5604 DEFSUBR (Fdecode_shift_jis_char);
|
|
|
5605 DEFSUBR (Fencode_shift_jis_char);
|
|
|
5606 DEFSUBR (Fdecode_big5_char);
|
|
|
5607 DEFSUBR (Fencode_big5_char);
|
|
|
5608 DEFSUBR (Fset_ucs_char);
|
|
|
5609 DEFSUBR (Fucs_char);
|
|
|
5610 DEFSUBR (Fset_char_ucs);
|
|
|
5611 DEFSUBR (Fchar_ucs);
|
|
|
5612 #endif /* MULE */
|
|
|
5613 defsymbol (&Qcoding_systemp, "coding-system-p");
|
|
|
5614 defsymbol (&Qno_conversion, "no-conversion");
|
|
|
5615 defsymbol (&Qraw_text, "raw-text");
|
|
|
5616 #ifdef MULE
|
|
|
5617 defsymbol (&Qbig5, "big5");
|
|
|
5618 defsymbol (&Qshift_jis, "shift-jis");
|
|
|
5619 defsymbol (&Qucs4, "ucs-4");
|
|
|
5620 defsymbol (&Qutf8, "utf-8");
|
|
|
5621 defsymbol (&Qccl, "ccl");
|
|
|
5622 defsymbol (&Qiso2022, "iso2022");
|
|
|
5623 #endif /* MULE */
|
|
|
5624 defsymbol (&Qmnemonic, "mnemonic");
|
|
|
5625 defsymbol (&Qeol_type, "eol-type");
|
|
|
5626 defsymbol (&Qpost_read_conversion, "post-read-conversion");
|
|
|
5627 defsymbol (&Qpre_write_conversion, "pre-write-conversion");
|
|
|
5628
|
|
|
5629 defsymbol (&Qcr, "cr");
|
|
|
5630 defsymbol (&Qlf, "lf");
|
|
|
5631 defsymbol (&Qcrlf, "crlf");
|
|
|
5632 defsymbol (&Qeol_cr, "eol-cr");
|
|
|
5633 defsymbol (&Qeol_lf, "eol-lf");
|
|
|
5634 defsymbol (&Qeol_crlf, "eol-crlf");
|
|
|
5635 #ifdef MULE
|
|
|
5636 defsymbol (&Qcharset_g0, "charset-g0");
|
|
|
5637 defsymbol (&Qcharset_g1, "charset-g1");
|
|
|
5638 defsymbol (&Qcharset_g2, "charset-g2");
|
|
|
5639 defsymbol (&Qcharset_g3, "charset-g3");
|
|
|
5640 defsymbol (&Qforce_g0_on_output, "force-g0-on-output");
|
|
|
5641 defsymbol (&Qforce_g1_on_output, "force-g1-on-output");
|
|
|
5642 defsymbol (&Qforce_g2_on_output, "force-g2-on-output");
|
|
|
5643 defsymbol (&Qforce_g3_on_output, "force-g3-on-output");
|
|
|
5644 defsymbol (&Qno_iso6429, "no-iso6429");
|
|
|
5645 defsymbol (&Qinput_charset_conversion, "input-charset-conversion");
|
|
|
5646 defsymbol (&Qoutput_charset_conversion, "output-charset-conversion");
|
|
|
5647
|
|
|
5648 defsymbol (&Qshort, "short");
|
|
|
5649 defsymbol (&Qno_ascii_eol, "no-ascii-eol");
|
|
|
5650 defsymbol (&Qno_ascii_cntl, "no-ascii-cntl");
|
|
|
5651 defsymbol (&Qseven, "seven");
|
|
|
5652 defsymbol (&Qlock_shift, "lock-shift");
|
|
|
5653 defsymbol (&Qescape_quoted, "escape-quoted");
|
|
|
5654 #endif /* MULE */
|
|
|
5655 defsymbol (&Qencode, "encode");
|
|
|
5656 defsymbol (&Qdecode, "decode");
|
|
|
5657
|
|
|
5658 #ifdef MULE
|
|
|
5659 defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
|
|
|
5660 "shift-jis");
|
|
|
5661 defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
|
|
|
5662 "big5");
|
|
|
5663 defsymbol (&coding_category_symbol[CODING_CATEGORY_UCS4],
|
|
|
5664 "ucs-4");
|
|
|
5665 defsymbol (&coding_category_symbol[CODING_CATEGORY_UTF8],
|
|
|
5666 "utf-8");
|
|
|
5667 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_7],
|
|
|
5668 "iso-7");
|
|
|
5669 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_DESIGNATE],
|
|
|
5670 "iso-8-designate");
|
|
|
5671 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_1],
|
|
|
5672 "iso-8-1");
|
|
|
5673 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_8_2],
|
|
|
5674 "iso-8-2");
|
|
|
5675 defsymbol (&coding_category_symbol[CODING_CATEGORY_ISO_LOCK_SHIFT],
|
|
|
5676 "iso-lock-shift");
|
|
|
5677 #endif /* MULE */
|
|
|
5678 defsymbol (&coding_category_symbol[CODING_CATEGORY_NO_CONVERSION],
|
|
|
5679 "no-conversion");
|
|
|
5680 }
|
|
|
5681
|
|
|
5682 void
|
|
|
5683 lstream_type_create_file_coding (void)
|
|
|
5684 {
|
|
|
5685 LSTREAM_HAS_METHOD (decoding, reader);
|
|
|
5686 LSTREAM_HAS_METHOD (decoding, writer);
|
|
|
5687 LSTREAM_HAS_METHOD (decoding, rewinder);
|
|
|
5688 LSTREAM_HAS_METHOD (decoding, seekable_p);
|
|
|
5689 LSTREAM_HAS_METHOD (decoding, flusher);
|
|
|
5690 LSTREAM_HAS_METHOD (decoding, closer);
|
|
|
5691 LSTREAM_HAS_METHOD (decoding, marker);
|
|
|
5692
|
|
|
5693 LSTREAM_HAS_METHOD (encoding, reader);
|
|
|
5694 LSTREAM_HAS_METHOD (encoding, writer);
|
|
|
5695 LSTREAM_HAS_METHOD (encoding, rewinder);
|
|
|
5696 LSTREAM_HAS_METHOD (encoding, seekable_p);
|
|
|
5697 LSTREAM_HAS_METHOD (encoding, flusher);
|
|
|
5698 LSTREAM_HAS_METHOD (encoding, closer);
|
|
|
5699 LSTREAM_HAS_METHOD (encoding, marker);
|
|
|
5700 }
|
|
|
5701
|
|
|
5702 void
|
|
|
5703 vars_of_file_coding (void)
|
|
|
5704 {
|
|
|
5705 int i;
|
|
|
5706
|
|
|
5707 fcd = xnew (struct file_coding_dump);
|
|
|
5708 dumpstruct (&fcd, &fcd_description);
|
|
|
5709
|
|
|
5710 /* Initialize to something reasonable ... */
|
|
|
5711 for (i = 0; i <= CODING_CATEGORY_LAST; i++)
|
|
|
5712 {
|
|
|
5713 fcd->coding_category_system[i] = Qnil;
|
|
|
5714 fcd->coding_category_by_priority[i] = i;
|
|
|
5715 }
|
|
|
5716
|
|
|
5717 Fprovide (intern ("file-coding"));
|
|
|
5718
|
|
|
5719 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
5720 Coding system used for TTY keyboard input.
|
|
|
5721 Not used under a windowing system.
|
|
|
5722 */ );
|
|
|
5723 Vkeyboard_coding_system = Qnil;
|
|
|
5724
|
|
|
5725 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
5726 Coding system used for TTY display output.
|
|
|
5727 Not used under a windowing system.
|
|
|
5728 */ );
|
|
|
5729 Vterminal_coding_system = Qnil;
|
|
|
5730
|
|
|
5731 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
440
|
5732 Overriding coding system used when reading from a file or process.
|
|
|
5733 You should bind this variable with `let', but do not set it globally.
|
|
|
5734 If this is non-nil, it specifies the coding system that will be used
|
|
|
5735 to decode input on read operations, such as from a file or process.
|
|
|
5736 It overrides `buffer-file-coding-system-for-read',
|
|
428
|
5737 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
440
|
5738 this one for permanent changes to the environment. */ );
|
|
428
|
5739 Vcoding_system_for_read = Qnil;
|
|
|
5740
|
|
|
5741 DEFVAR_LISP ("coding-system-for-write",
|
|
|
5742 &Vcoding_system_for_write /*
|
|
440
|
5743 Overriding coding system used when writing to a file or process.
|
|
|
5744 You should bind this variable with `let', but do not set it globally.
|
|
|
5745 If this is non-nil, it specifies the coding system that will be used
|
|
|
5746 to encode output for write operations, such as to a file or process.
|
|
|
5747 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
|
|
|
5748 Use those variables instead of this one for permanent changes to the
|
|
|
5749 environment. */ );
|
|
428
|
5750 Vcoding_system_for_write = Qnil;
|
|
|
5751
|
|
|
5752 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
|
5753 Coding system used to convert pathnames when accessing files.
|
|
|
5754 */ );
|
|
|
5755 Vfile_name_coding_system = Qnil;
|
|
|
5756
|
|
|
5757 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
|
5758 Non-nil means the buffer contents are regarded as multi-byte form
|
|
|
5759 of characters, not a binary code. This affects the display, file I/O,
|
|
|
5760 and behaviors of various editing commands.
|
|
|
5761
|
|
|
5762 Setting this to nil does not do anything.
|
|
|
5763 */ );
|
|
|
5764 enable_multibyte_characters = 1;
|
|
|
5765 }
|
|
|
5766
|
|
|
5767 void
|
|
|
5768 complex_vars_of_file_coding (void)
|
|
|
5769 {
|
|
|
5770 staticpro (&Vcoding_system_hash_table);
|
|
|
5771 Vcoding_system_hash_table =
|
|
|
5772 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
5773
|
|
|
5774 the_codesys_prop_dynarr = Dynarr_new (codesys_prop);
|
|
|
5775 dumpstruct (&the_codesys_prop_dynarr, &codesys_prop_dynarr_description);
|
|
|
5776
|
|
|
5777 #define DEFINE_CODESYS_PROP(Prop_Type, Sym) do \
|
|
|
5778 { \
|
|
|
5779 struct codesys_prop csp; \
|
|
|
5780 csp.sym = (Sym); \
|
|
|
5781 csp.prop_type = (Prop_Type); \
|
|
|
5782 Dynarr_add (the_codesys_prop_dynarr, csp); \
|
|
|
5783 } while (0)
|
|
|
5784
|
|
|
5785 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qmnemonic);
|
|
|
5786 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_type);
|
|
|
5787 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_cr);
|
|
|
5788 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_crlf);
|
|
|
5789 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qeol_lf);
|
|
|
5790 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpost_read_conversion);
|
|
|
5791 DEFINE_CODESYS_PROP (CODESYS_PROP_ALL_OK, Qpre_write_conversion);
|
|
|
5792 #ifdef MULE
|
|
|
5793 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g0);
|
|
|
5794 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g1);
|
|
|
5795 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g2);
|
|
|
5796 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qcharset_g3);
|
|
|
5797 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g0_on_output);
|
|
|
5798 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g1_on_output);
|
|
|
5799 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g2_on_output);
|
|
|
5800 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qforce_g3_on_output);
|
|
|
5801 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qshort);
|
|
|
5802 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_eol);
|
|
|
5803 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_ascii_cntl);
|
|
|
5804 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qseven);
|
|
|
5805 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qlock_shift);
|
|
|
5806 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qno_iso6429);
|
|
|
5807 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qescape_quoted);
|
|
|
5808 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qinput_charset_conversion);
|
|
|
5809 DEFINE_CODESYS_PROP (CODESYS_PROP_ISO2022, Qoutput_charset_conversion);
|
|
|
5810
|
|
|
5811 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qencode);
|
|
|
5812 DEFINE_CODESYS_PROP (CODESYS_PROP_CCL, Qdecode);
|
|
|
5813 #endif /* MULE */
|
|
|
5814 /* Need to create this here or we're really screwed. */
|
|
|
5815 Fmake_coding_system
|
|
|
5816 (Qraw_text, Qno_conversion,
|
|
|
5817 build_string ("Raw text, which means it converts only line-break-codes."),
|
|
|
5818 list2 (Qmnemonic, build_string ("Raw")));
|
|
|
5819
|
|
|
5820 Fmake_coding_system
|
|
|
5821 (Qbinary, Qno_conversion,
|
|
|
5822 build_string ("Binary, which means it does not convert anything."),
|
|
|
5823 list4 (Qeol_type, Qlf,
|
|
|
5824 Qmnemonic, build_string ("Binary")));
|
|
|
5825
|
|
|
5826 Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
|
|
|
5827
|
|
440
|
5828 Fdefine_coding_system_alias (Qfile_name, Qbinary);
|
|
|
5829
|
|
|
5830 Fdefine_coding_system_alias (Qterminal, Qbinary);
|
|
|
5831 Fdefine_coding_system_alias (Qkeyboard, Qbinary);
|
|
|
5832
|
|
428
|
5833 /* Need this for bootstrapping */
|
|
|
5834 fcd->coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
|
|
|
5835 Fget_coding_system (Qraw_text);
|
|
|
5836
|
|
|
5837 #ifdef MULE
|
|
|
5838 {
|
|
442
|
5839 size_t i;
|
|
|
5840
|
|
|
5841 for (i = 0; i < countof (fcd->ucs_to_mule_table); i++)
|
|
428
|
5842 fcd->ucs_to_mule_table[i] = Qnil;
|
|
|
5843 }
|
|
|
5844 staticpro (&mule_to_ucs_table);
|
|
|
5845 mule_to_ucs_table = Fmake_char_table(Qgeneric);
|
|
|
5846 #endif /* MULE */
|
|
|
5847 }
|
