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771
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1 /* Header for charsets.
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2 Copyright (C) 1992, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4 Copyright (C) 2001, 2002 Ben Wing.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Mule 2.3. Not in FSF. */
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24
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25 /* Rewritten by Ben Wing <ben@xemacs.org>. */
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26
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27 #ifndef INCLUDED_charset_h_
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28 #define INCLUDED_charset_h_
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29
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30
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31
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32 #ifndef MULE
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33
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34 /************************************************************************/
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35 /* fake charset defs */
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36 /************************************************************************/
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37
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38 /* used when MULE is not defined, so that Charset-type stuff can still
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39 be done */
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40
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41 #define Vcharset_ascii Qnil
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42
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867
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43 #define ichar_charset(ch) Vcharset_ascii
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44 #define ichar_leading_byte(ch) LEADING_BYTE_ASCII
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45 #define ichar_len(ch) 1
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46 #define ichar_len_fmt(ch, fmt) 1
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771
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47 #define LEADING_BYTE_ASCII 0x80
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48 #define NUM_LEADING_BYTES 1
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49 #define MIN_LEADING_BYTE 0x80
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50 #define CHARSETP(cs) 1
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826
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51 #define charset_by_leading_byte(lb) Vcharset_ascii
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771
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52 #define XCHARSET_LEADING_BYTE(cs) LEADING_BYTE_ASCII
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53 #define XCHARSET_GRAPHIC(cs) -1
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54 #define XCHARSET_COLUMNS(cs) 1
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55 #define XCHARSET_DIMENSION(cs) 1
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867
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56 #define BREAKUP_ICHAR(ch, charset, byte1, byte2) do { \
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771
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57 (charset) = Vcharset_ascii; \
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58 (byte1) = (ch); \
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59 (byte2) = 0; \
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60 } while (0)
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3659
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61 #define XCHARSET_CCL_PROGRAM(cs) Qnil
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62 #define XCHARSET_NAME(cs) Qascii
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771
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63
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64 #else /* MULE */
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65
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66
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67 /************************************************************************/
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68 /* Definition of leading bytes */
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69 /************************************************************************/
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70
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71 #define MIN_LEADING_BYTE 0x7F
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72
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73 /** The following are for 1-byte characters in an official charset. **/
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74 enum LEADING_BYTE_OFFICIAL_1
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75 {
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76 MIN_LEADING_BYTE_OFFICIAL_1 = 0x80,
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77 /* LEADING_BYTE_LATIN_ISO8859_1 *MUST* be equal to
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78 MIN_LEADING_BYTE_OFFICIAL_1. */
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79 LEADING_BYTE_LATIN_ISO8859_1 = /* 0x80 Right half of ISO 8859-1 */
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80 MIN_LEADING_BYTE_OFFICIAL_1,
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81 LEADING_BYTE_LATIN_ISO8859_2, /* 0x81 Right half of ISO 8859-2 */
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82 LEADING_BYTE_LATIN_ISO8859_3, /* 0x82 Right half of ISO 8859-3 */
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83 LEADING_BYTE_LATIN_ISO8859_4, /* 0x83 Right half of ISO 8859-4 */
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84 LEADING_BYTE_THAI_TIS620, /* 0x84 TIS620-2533 */
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85 LEADING_BYTE_GREEK_ISO8859_7, /* 0x85 Right half of ISO 8859-7 */
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86 LEADING_BYTE_ARABIC_ISO8859_6, /* 0x86 Right half of ISO 8859-6 */
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87 LEADING_BYTE_HEBREW_ISO8859_8, /* 0x87 Right half of ISO 8859-8 */
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88 LEADING_BYTE_KATAKANA_JISX0201, /* 0x88 Right half of JIS X0201-1976 */
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89 LEADING_BYTE_LATIN_JISX0201, /* 0x89 Left half of JIS X0201-1976 */
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90 LEADING_BYTE_CYRILLIC_ISO8859_5,/* 0x8A Right half of ISO 8859-5 */
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91 LEADING_BYTE_LATIN_ISO8859_9, /* 0x8B Right half of ISO 8859-9 */
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92 LEADING_BYTE_LATIN_ISO8859_15, /* 0x8C Right half of ISO 8859-15 */
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93 #ifdef ENABLE_COMPOSITE_CHARS
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94 LEADING_BYTE_COMPOSITE, /* 0x8D For a composite character */
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95 MAX_LEADING_BYTE_OFFICIAL_1 =
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96 LEADING_BYTE_COMPOSITE - 1,
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97 #else
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98 /* Does not need to be the last entry, but simplifies things */
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99 LEADING_BYTE_COMPOSITE_REPLACEMENT, /* 0x8D Replaces ESC 0 - ESC 4 in a
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100 buffer */
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101 MAX_LEADING_BYTE_OFFICIAL_1 =
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102 LEADING_BYTE_COMPOSITE_REPLACEMENT,
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103 #endif
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104 /* 0x8E Unused */
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105 };
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106
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107 /* These next 2 + LEADING_BYTE_COMPOSITE need special treatment in a string
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108 and/or character */
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109
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110 #define LEADING_BYTE_ASCII 0x7F /* Not used except in arrays
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111 indexed by leading byte */
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112 #define LEADING_BYTE_CONTROL_1 0x8F /* represent normal 80-9F */
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113
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114 /** The following are for 2-byte characters in an official charset. **/
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115 enum LEADING_BYTE_OFFICIAL_2
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116 {
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117 MIN_LEADING_BYTE_OFFICIAL_2 = 0x90,
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118 LEADING_BYTE_JAPANESE_JISX0208_1978 =
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119 MIN_LEADING_BYTE_OFFICIAL_2, /* 0x90 Japanese JIS X0208-1978 */
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120 LEADING_BYTE_CHINESE_GB2312, /* 0x91 Chinese Hanzi GB2312-1980 */
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121 LEADING_BYTE_JAPANESE_JISX0208, /* 0x92 Japanese JIS X0208-1983 */
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122 LEADING_BYTE_KOREAN_KSC5601, /* 0x93 Hangul KS C5601-1987 */
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123 LEADING_BYTE_JAPANESE_JISX0212, /* 0x94 Japanese JIS X0212-1990 */
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124 LEADING_BYTE_CHINESE_CNS11643_1, /* 0x95 Chinese CNS11643 Set 1 */
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125 LEADING_BYTE_CHINESE_CNS11643_2, /* 0x96 Chinese CNS11643 Set 2 */
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126 LEADING_BYTE_CHINESE_BIG5_1, /* 0x97 Big5 Level 1 */
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127 LEADING_BYTE_CHINESE_BIG5_2, /* 0x98 Big5 Level 2 */
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128 MAX_LEADING_BYTE_OFFICIAL_2 =
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129 LEADING_BYTE_CHINESE_BIG5_2,
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130
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131 /* 0x99 unused */
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132 /* 0x9A unused */
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133 /* 0x9B unused */
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134 /* 0x9C unused */
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135 /* 0x9D unused */
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136 };
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137
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138
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139 /** The following are for 1- and 2-byte characters in a private charset. **/
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140
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141 #define PRE_LEADING_BYTE_PRIVATE_1 0x9E /* 1-byte char-set */
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142 #define PRE_LEADING_BYTE_PRIVATE_2 0x9F /* 2-byte char-set */
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143
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144 #define MIN_LEADING_BYTE_PRIVATE_1 0xA0
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3496
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145 #define MAX_LEADING_BYTE_PRIVATE_1 0xC0
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146 #define MIN_LEADING_BYTE_PRIVATE_2 0xC1
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771
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147 #define MAX_LEADING_BYTE_PRIVATE_2 0xFF
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148
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149 #define NUM_LEADING_BYTES 129
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150
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151
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152 /************************************************************************/
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153 /* Operations on leading bytes */
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154 /************************************************************************/
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155
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156 /* Is this leading byte for a private charset? */
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157
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826
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158 #define leading_byte_private_p(lb) ((lb) >= MIN_LEADING_BYTE_PRIVATE_1)
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771
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159
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160 /* Is this a prefix for a private leading byte? */
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161
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826
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162 DECLARE_INLINE_HEADER (
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163 int
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867
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164 leading_byte_prefix_p (Ibyte lb)
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826
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165 )
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771
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166 {
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167 return (lb == PRE_LEADING_BYTE_PRIVATE_1 ||
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168 lb == PRE_LEADING_BYTE_PRIVATE_2);
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169 }
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170
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171 /* Given a private leading byte, return the leading byte prefix stored
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172 in a string. */
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173
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826
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174 #define private_leading_byte_prefix(lb) \
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771
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175 ((unsigned int) (lb) < MIN_LEADING_BYTE_PRIVATE_2 ? \
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176 PRE_LEADING_BYTE_PRIVATE_1 : \
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177 PRE_LEADING_BYTE_PRIVATE_2)
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178
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179
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180 /************************************************************************/
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181 /* Information about a particular character set */
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182 /************************************************************************/
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183
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184 struct Lisp_Charset
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185 {
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3017
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186 struct LCRECORD_HEADER header;
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771
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187
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188 int id;
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189 Lisp_Object name;
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190 Lisp_Object doc_string;
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3659
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191 Lisp_Object registries;
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771
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192 Lisp_Object short_name;
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193 Lisp_Object long_name;
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194
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195 Lisp_Object reverse_direction_charset;
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196
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197 Lisp_Object ccl_program;
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198
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2367
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199 /* Unicode translation tables. See unicode.c for the format of these
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200 tables, and discussion of how they are initialized.
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201 */
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771
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202 void *to_unicode_table;
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203 void *from_unicode_table;
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204 int from_unicode_levels;
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205
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2367
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206 /* Final byte of this character set in ISO2022 designating escape
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207 sequence */
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867
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208 Ibyte final;
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771
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209
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210 /* Number of bytes (1 - 4) required in the internal representation
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211 for characters in this character set. This is *not* the
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212 same as the dimension of the character set). */
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213 int rep_bytes;
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214
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215 /* Number of columns a character in this charset takes up, on TTY
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216 devices. Not used for X devices. */
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217 int columns;
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218
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219 /* Direction of this character set */
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220 int direction;
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221
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222 /* Type of this character set (94, 96, 94x94, 96x96) */
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223 int type;
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224
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225 /* Number of bytes used in encoding of this character set (1 or 2) */
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226 int dimension;
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227
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228 /* Number of chars in each dimension (usually 94 or 96) */
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229 int chars;
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230
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231 /* Which half of font to be used to display this character set */
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232 int graphic;
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233
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3439
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234 /* If set, this charset should be written out in ISO-2022-based coding
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235 systems using the escape sequence for UTF-8, not using our internal
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236 representation and the associated real ISO 2022 designation. */
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237 unsigned int encode_as_utf_8 :1;
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238
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771
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239 /* If set, this is a "temporary" charset created when we encounter
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240 an unknown final. This is so that we can successfully compile
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241 and load such files. We allow a real charset to be created on top
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242 of this temporary charset. */
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243 unsigned int temporary :1;
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244 };
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245 typedef struct Lisp_Charset Lisp_Charset;
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246
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247 DECLARE_LRECORD (charset, Lisp_Charset);
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248 #define XCHARSET(x) XRECORD (x, charset, Lisp_Charset)
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249 #define wrap_charset(p) wrap_record (p, charset)
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250 #define CHARSETP(x) RECORDP (x, charset)
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251 #define CHECK_CHARSET(x) CHECK_RECORD (x, charset)
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252 #define CONCHECK_CHARSET(x) CONCHECK_RECORD (x, charset)
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253
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254 #define CHARSET_TYPE_94 0 /* This charset includes 94 characters. */
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255 #define CHARSET_TYPE_96 1 /* This charset includes 96 characters. */
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256 #define CHARSET_TYPE_94X94 2 /* This charset includes 94x94 characters. */
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257 #define CHARSET_TYPE_96X96 3 /* This charset includes 96x96 characters. */
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258
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259 #define CHARSET_LEFT_TO_RIGHT 0
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260 #define CHARSET_RIGHT_TO_LEFT 1
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261
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262 /* Leading byte and id have been regrouped. -- OG */
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263 #define CHARSET_ID(cs) ((cs)->id)
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867
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264 #define CHARSET_LEADING_BYTE(cs) ((Ibyte) CHARSET_ID (cs))
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771
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265 #define CHARSET_NAME(cs) ((cs)->name)
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266 #define CHARSET_SHORT_NAME(cs) ((cs)->short_name)
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267 #define CHARSET_LONG_NAME(cs) ((cs)->long_name)
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268 #define CHARSET_REP_BYTES(cs) ((cs)->rep_bytes)
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269 #define CHARSET_COLUMNS(cs) ((cs)->columns)
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270 #define CHARSET_GRAPHIC(cs) ((cs)->graphic)
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3439
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271 #define CHARSET_ENCODE_AS_UTF_8(cs) ((cs)->encode_as_utf_8)
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771
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272 #define CHARSET_TYPE(cs) ((cs)->type)
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273 #define CHARSET_DIRECTION(cs) ((cs)->direction)
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274 #define CHARSET_FINAL(cs) ((cs)->final)
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275 #define CHARSET_DOC_STRING(cs) ((cs)->doc_string)
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3659
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276 #define CHARSET_REGISTRIES(cs) ((cs)->registries)
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771
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277 #define CHARSET_CCL_PROGRAM(cs) ((cs)->ccl_program)
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278 #define CHARSET_DIMENSION(cs) ((cs)->dimension)
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279 #define CHARSET_CHARS(cs) ((cs)->chars)
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280 #define CHARSET_REVERSE_DIRECTION_CHARSET(cs) ((cs)->reverse_direction_charset)
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281 #define CHARSET_TO_UNICODE_TABLE(cs) ((cs)->to_unicode_table)
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282 #define CHARSET_FROM_UNICODE_TABLE(cs) ((cs)->from_unicode_table)
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283 #define CHARSET_FROM_UNICODE_LEVELS(cs) ((cs)->from_unicode_levels)
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284
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826
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285 #define CHARSET_PRIVATE_P(cs) leading_byte_private_p (CHARSET_LEADING_BYTE (cs))
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771
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286
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287 #define XCHARSET_ID(cs) CHARSET_ID (XCHARSET (cs))
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288 #define XCHARSET_NAME(cs) CHARSET_NAME (XCHARSET (cs))
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289 #define XCHARSET_SHORT_NAME(cs) CHARSET_SHORT_NAME (XCHARSET (cs))
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290 #define XCHARSET_LONG_NAME(cs) CHARSET_LONG_NAME (XCHARSET (cs))
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291 #define XCHARSET_REP_BYTES(cs) CHARSET_REP_BYTES (XCHARSET (cs))
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292 #define XCHARSET_COLUMNS(cs) CHARSET_COLUMNS (XCHARSET (cs))
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293 #define XCHARSET_GRAPHIC(cs) CHARSET_GRAPHIC (XCHARSET (cs))
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3439
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294 #define XCHARSET_ENCODE_AS_UTF_8(cs) CHARSET_ENCODE_AS_UTF_8 (XCHARSET (cs))
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771
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295 #define XCHARSET_TYPE(cs) CHARSET_TYPE (XCHARSET (cs))
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296 #define XCHARSET_DIRECTION(cs) CHARSET_DIRECTION (XCHARSET (cs))
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297 #define XCHARSET_FINAL(cs) CHARSET_FINAL (XCHARSET (cs))
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298 #define XCHARSET_DOC_STRING(cs) CHARSET_DOC_STRING (XCHARSET (cs))
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3659
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299 #define XCHARSET_REGISTRIES(cs) CHARSET_REGISTRIES (XCHARSET (cs))
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771
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300 #define XCHARSET_LEADING_BYTE(cs) CHARSET_LEADING_BYTE (XCHARSET (cs))
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301 #define XCHARSET_CCL_PROGRAM(cs) CHARSET_CCL_PROGRAM (XCHARSET (cs))
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302 #define XCHARSET_DIMENSION(cs) CHARSET_DIMENSION (XCHARSET (cs))
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303 #define XCHARSET_CHARS(cs) CHARSET_CHARS (XCHARSET (cs))
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3659
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304
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771
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305 #define XCHARSET_PRIVATE_P(cs) CHARSET_PRIVATE_P (XCHARSET (cs))
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306 #define XCHARSET_REVERSE_DIRECTION_CHARSET(cs) \
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307 CHARSET_REVERSE_DIRECTION_CHARSET (XCHARSET (cs))
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308 #define XCHARSET_TO_UNICODE_TABLE(cs) \
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309 CHARSET_TO_UNICODE_TABLE (XCHARSET (cs))
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310 #define XCHARSET_FROM_UNICODE_TABLE(cs) \
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311 CHARSET_FROM_UNICODE_TABLE (XCHARSET (cs))
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312 #define XCHARSET_FROM_UNICODE_LEVELS(cs) \
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313 CHARSET_FROM_UNICODE_LEVELS (XCHARSET (cs))
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314
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315 struct charset_lookup
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316 {
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317 /* Table of charsets indexed by leading byte. */
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318 Lisp_Object charset_by_leading_byte[NUM_LEADING_BYTES];
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319
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320 /* Table of charsets indexed by type/final-byte/direction. */
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321 Lisp_Object charset_by_attributes[4][128][2];
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867
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322 Ibyte next_allocated_1_byte_leading_byte;
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323 Ibyte next_allocated_2_byte_leading_byte;
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771
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324 };
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325
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1111
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326 extern struct charset_lookup *chlook;
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327
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826
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328 DECLARE_INLINE_HEADER (
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329 Lisp_Object
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330 charset_by_leading_byte (int lb)
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331 )
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771
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332 {
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800
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333 #ifdef ERROR_CHECK_TEXT
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771
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334 /* When error-checking is on, x86 GCC 2.95.2 -O3 miscompiles the
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335 following unless we introduce `tem'. */
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336 int tem = lb;
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800
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337 text_checking_assert (tem >= MIN_LEADING_BYTE && tem <= 0xFF);
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771
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338 #endif
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339 return chlook->charset_by_leading_byte[lb - MIN_LEADING_BYTE];
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340 }
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|
|
341
|
|
826
|
342 DECLARE_INLINE_HEADER (
|
|
|
343 Lisp_Object
|
|
|
344 charset_by_attributes (int type, int final, int dir)
|
|
|
345 )
|
|
771
|
346 {
|
|
|
347 type_checking_assert (type < countof (chlook->charset_by_attributes) &&
|
|
|
348 final < countof (chlook->charset_by_attributes[0]) &&
|
|
|
349 dir < countof (chlook->charset_by_attributes[0][0]));
|
|
|
350 return chlook->charset_by_attributes[type][final][dir];
|
|
|
351 }
|
|
|
352
|
|
|
353
|
|
|
354 /************************************************************************/
|
|
|
355 /* Dealing with characters */
|
|
|
356 /************************************************************************/
|
|
|
357
|
|
|
358 /* The bit fields of character are divided into 3 parts:
|
|
3496
|
359 FIELD1(7bits):FIELD2(7bits):FIELD3(7bits) */
|
|
771
|
360
|
|
3496
|
361 #define ICHAR_FIELD1_MASK (0x7F << 14)
|
|
867
|
362 #define ICHAR_FIELD2_MASK (0x7F << 7)
|
|
|
363 #define ICHAR_FIELD3_MASK 0x7F
|
|
771
|
364
|
|
|
365 /* Macros to access each field of a character code of C. */
|
|
|
366
|
|
867
|
367 #define ichar_field1(c) (((c) & ICHAR_FIELD1_MASK) >> 14)
|
|
|
368 #define ichar_field2(c) (((c) & ICHAR_FIELD2_MASK) >> 7)
|
|
|
369 #define ichar_field3(c) ((c) & ICHAR_FIELD3_MASK)
|
|
771
|
370
|
|
|
371 /* Field 1, if non-zero, usually holds a leading byte for a
|
|
|
372 dimension-2 charset. Field 2, if non-zero, usually holds a leading
|
|
|
373 byte for a dimension-1 charset. */
|
|
|
374
|
|
|
375 /* Converting between field values and leading bytes. */
|
|
|
376
|
|
|
377 #define FIELD2_TO_OFFICIAL_LEADING_BYTE (MIN_LEADING_BYTE_OFFICIAL_1 - 1)
|
|
|
378 #define FIELD2_TO_PRIVATE_LEADING_BYTE 0x80
|
|
|
379
|
|
|
380 #define FIELD1_TO_OFFICIAL_LEADING_BYTE (MIN_LEADING_BYTE_OFFICIAL_2 - 1)
|
|
3496
|
381 #define FIELD1_TO_PRIVATE_LEADING_BYTE 0x80
|
|
771
|
382
|
|
|
383 /* Minimum and maximum allowed values for the fields. */
|
|
|
384
|
|
867
|
385 #define MIN_ICHAR_FIELD2_OFFICIAL \
|
|
771
|
386 (MIN_LEADING_BYTE_OFFICIAL_1 - FIELD2_TO_OFFICIAL_LEADING_BYTE)
|
|
867
|
387 #define MAX_ICHAR_FIELD2_OFFICIAL \
|
|
771
|
388 (MAX_LEADING_BYTE_OFFICIAL_1 - FIELD2_TO_OFFICIAL_LEADING_BYTE)
|
|
|
389
|
|
867
|
390 #define MIN_ICHAR_FIELD1_OFFICIAL \
|
|
771
|
391 (MIN_LEADING_BYTE_OFFICIAL_2 - FIELD1_TO_OFFICIAL_LEADING_BYTE)
|
|
867
|
392 #define MAX_ICHAR_FIELD1_OFFICIAL \
|
|
771
|
393 (MAX_LEADING_BYTE_OFFICIAL_2 - FIELD1_TO_OFFICIAL_LEADING_BYTE)
|
|
|
394
|
|
867
|
395 #define MIN_ICHAR_FIELD2_PRIVATE \
|
|
771
|
396 (MIN_LEADING_BYTE_PRIVATE_1 - FIELD2_TO_PRIVATE_LEADING_BYTE)
|
|
867
|
397 #define MAX_ICHAR_FIELD2_PRIVATE \
|
|
771
|
398 (MAX_LEADING_BYTE_PRIVATE_1 - FIELD2_TO_PRIVATE_LEADING_BYTE)
|
|
|
399
|
|
867
|
400 #define MIN_ICHAR_FIELD1_PRIVATE \
|
|
771
|
401 (MIN_LEADING_BYTE_PRIVATE_2 - FIELD1_TO_PRIVATE_LEADING_BYTE)
|
|
867
|
402 #define MAX_ICHAR_FIELD1_PRIVATE \
|
|
771
|
403 (MAX_LEADING_BYTE_PRIVATE_2 - FIELD1_TO_PRIVATE_LEADING_BYTE)
|
|
|
404
|
|
|
405 /* Minimum character code of each <type> character. */
|
|
|
406
|
|
867
|
407 #define MIN_CHAR_OFFICIAL_TYPE9N (MIN_ICHAR_FIELD2_OFFICIAL << 7)
|
|
|
408 #define MIN_CHAR_PRIVATE_TYPE9N (MIN_ICHAR_FIELD2_PRIVATE << 7)
|
|
|
409 #define MIN_CHAR_OFFICIAL_TYPE9NX9N (MIN_ICHAR_FIELD1_OFFICIAL << 14)
|
|
|
410 #define MIN_CHAR_PRIVATE_TYPE9NX9N (MIN_ICHAR_FIELD1_PRIVATE << 14)
|
|
3496
|
411 #define MIN_CHAR_COMPOSITION (0x7F << 14)
|
|
771
|
412
|
|
|
413 /* Leading byte of a character.
|
|
|
414
|
|
|
415 NOTE: This takes advantage of the fact that
|
|
|
416 FIELD2_TO_OFFICIAL_LEADING_BYTE and
|
|
|
417 FIELD2_TO_PRIVATE_LEADING_BYTE are the same.
|
|
|
418 */
|
|
|
419
|
|
826
|
420 DECLARE_INLINE_HEADER (
|
|
867
|
421 Ibyte
|
|
|
422 ichar_leading_byte (Ichar c)
|
|
826
|
423 )
|
|
771
|
424 {
|
|
867
|
425 if (ichar_ascii_p (c))
|
|
771
|
426 return LEADING_BYTE_ASCII;
|
|
|
427 else if (c < 0xA0)
|
|
|
428 return LEADING_BYTE_CONTROL_1;
|
|
|
429 else if (c < MIN_CHAR_OFFICIAL_TYPE9NX9N)
|
|
867
|
430 return ichar_field2 (c) + FIELD2_TO_OFFICIAL_LEADING_BYTE;
|
|
771
|
431 else if (c < MIN_CHAR_PRIVATE_TYPE9NX9N)
|
|
867
|
432 return ichar_field1 (c) + FIELD1_TO_OFFICIAL_LEADING_BYTE;
|
|
771
|
433 else if (c < MIN_CHAR_COMPOSITION)
|
|
867
|
434 return ichar_field1 (c) + FIELD1_TO_PRIVATE_LEADING_BYTE;
|
|
771
|
435 else
|
|
|
436 {
|
|
|
437 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
438 return LEADING_BYTE_COMPOSITE;
|
|
|
439 #else
|
|
2500
|
440 ABORT();
|
|
771
|
441 return 0;
|
|
|
442 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
443 }
|
|
|
444 }
|
|
|
445
|
|
826
|
446 DECLARE_INLINE_HEADER (
|
|
|
447 Bytecount
|
|
867
|
448 ichar_len (Ichar c)
|
|
826
|
449 )
|
|
|
450 {
|
|
867
|
451 if (ichar_ascii_p (c))
|
|
826
|
452 return 1;
|
|
|
453 else if (c < MIN_CHAR_OFFICIAL_TYPE9NX9N)
|
|
|
454 return 2;
|
|
|
455 else if (c < MIN_CHAR_PRIVATE_TYPE9NX9N)
|
|
|
456 return 3; /* dimension-2 official or dimension-1 private */
|
|
|
457 else if (c < MIN_CHAR_COMPOSITION)
|
|
|
458 return 4;
|
|
|
459 else
|
|
|
460 {
|
|
|
461 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
462 #error Not yet implemented
|
|
|
463 #else
|
|
2500
|
464 ABORT();
|
|
826
|
465 return 0;
|
|
|
466 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
467 }
|
|
|
468 }
|
|
|
469
|
|
|
470 DECLARE_INLINE_HEADER (
|
|
|
471 Bytecount
|
|
867
|
472 ichar_len_fmt (Ichar c, Internal_Format fmt)
|
|
826
|
473 )
|
|
|
474 {
|
|
|
475 switch (fmt)
|
|
|
476 {
|
|
|
477 case FORMAT_DEFAULT:
|
|
867
|
478 return ichar_len (c);
|
|
826
|
479 case FORMAT_16_BIT_FIXED:
|
|
|
480 return 2;
|
|
|
481 case FORMAT_32_BIT_FIXED:
|
|
|
482 return 4;
|
|
|
483 default:
|
|
|
484 text_checking_assert (fmt == FORMAT_8_BIT_FIXED);
|
|
|
485 return 1;
|
|
|
486 }
|
|
|
487 }
|
|
|
488
|
|
867
|
489 #define ichar_charset(c) charset_by_leading_byte (ichar_leading_byte (c))
|
|
771
|
490
|
|
|
491 /* Return a character whose charset is CHARSET and position-codes are C1
|
|
|
492 and C2. TYPE9N character ignores C2. (For typical charsets, i.e. not
|
|
|
493 ASCII, Control-1 or Composite, C1 and C2 will be in the range of 32 to
|
|
|
494 127 or 33 to 126. See `make-char'.)
|
|
|
495
|
|
|
496 NOTE: This takes advantage of the fact that
|
|
|
497 FIELD2_TO_OFFICIAL_LEADING_BYTE and
|
|
|
498 FIELD2_TO_PRIVATE_LEADING_BYTE are the same.
|
|
|
499 */
|
|
|
500
|
|
826
|
501 DECLARE_INLINE_HEADER (
|
|
867
|
502 Ichar
|
|
|
503 make_ichar (Lisp_Object charset, int c1, int c2)
|
|
826
|
504 )
|
|
771
|
505 {
|
|
867
|
506 Ichar retval;
|
|
771
|
507 if (EQ (charset, Vcharset_ascii))
|
|
826
|
508 retval = c1;
|
|
771
|
509 else if (EQ (charset, Vcharset_control_1))
|
|
826
|
510 retval = c1 | 0x80;
|
|
771
|
511 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
512 else if (EQ (charset, Vcharset_composite))
|
|
826
|
513 retval = (0x1F << 14) | ((c1) << 7) | (c2);
|
|
771
|
514 #endif
|
|
|
515 else if (XCHARSET_DIMENSION (charset) == 1)
|
|
826
|
516 retval = ((XCHARSET_LEADING_BYTE (charset) -
|
|
|
517 FIELD2_TO_OFFICIAL_LEADING_BYTE) << 7) | (c1);
|
|
771
|
518 else if (!XCHARSET_PRIVATE_P (charset))
|
|
826
|
519 retval = ((XCHARSET_LEADING_BYTE (charset) -
|
|
|
520 FIELD1_TO_OFFICIAL_LEADING_BYTE) << 14) | ((c1) << 7) | (c2);
|
|
771
|
521 else
|
|
826
|
522 retval = ((XCHARSET_LEADING_BYTE (charset) -
|
|
|
523 FIELD1_TO_PRIVATE_LEADING_BYTE) << 14) | ((c1) << 7) | (c2);
|
|
867
|
524 text_checking_assert (valid_ichar_p (retval));
|
|
826
|
525 return retval;
|
|
771
|
526 }
|
|
|
527
|
|
867
|
528 /* BREAKUP_ICHAR_1_UNSAFE assumes that the charset has already been
|
|
771
|
529 calculated, and just computes c1 and c2.
|
|
|
530
|
|
867
|
531 BREAKUP_ICHAR also computes and stores the charset. */
|
|
771
|
532
|
|
867
|
533 #define BREAKUP_ICHAR_1_UNSAFE(c, charset, c1, c2) \
|
|
771
|
534 XCHARSET_DIMENSION (charset) == 1 \
|
|
867
|
535 ? ((c1) = ichar_field3 (c), (c2) = 0) \
|
|
|
536 : ((c1) = ichar_field2 (c), \
|
|
|
537 (c2) = ichar_field3 (c))
|
|
771
|
538
|
|
826
|
539 DECLARE_INLINE_HEADER (
|
|
|
540 void
|
|
867
|
541 breakup_ichar_1 (Ichar c, Lisp_Object *charset, int *c1, int *c2)
|
|
826
|
542 )
|
|
771
|
543 {
|
|
867
|
544 text_checking_assert (valid_ichar_p (c));
|
|
|
545 *charset = ichar_charset (c);
|
|
|
546 BREAKUP_ICHAR_1_UNSAFE (c, *charset, *c1, *c2);
|
|
771
|
547 }
|
|
|
548
|
|
867
|
549 /* BREAKUP_ICHAR separates an Ichar into its components. The charset of
|
|
771
|
550 character C is set to CHARSET, and the position-codes of C are set to C1
|
|
|
551 and C2. C2 of TYPE9N character is 0. */
|
|
|
552
|
|
867
|
553 #define BREAKUP_ICHAR(c, charset, c1, c2) \
|
|
|
554 breakup_ichar_1 (c, &(charset), &(c1), &(c2))
|
|
771
|
555
|
|
788
|
556 void get_charset_limits (Lisp_Object charset, int *low, int *high);
|
|
867
|
557 int ichar_to_unicode (Ichar chr);
|
|
788
|
558
|
|
3439
|
559 EXFUN (Fcharset_name, 1);
|
|
|
560
|
|
771
|
561 #endif /* MULE */
|
|
|
562
|
|
3439
|
563 /* ISO 10646 UTF-16, UCS-4, UTF-8, UTF-7, etc. */
|
|
|
564
|
|
|
565 enum unicode_type
|
|
|
566 {
|
|
|
567 UNICODE_UTF_16,
|
|
|
568 UNICODE_UTF_8,
|
|
|
569 UNICODE_UTF_7,
|
|
4096
|
570 UNICODE_UCS_4,
|
|
|
571 UNICODE_UTF_32
|
|
3439
|
572 };
|
|
|
573
|
|
|
574 void encode_unicode_char (Lisp_Object USED_IF_MULE (charset), int h,
|
|
|
575 int USED_IF_MULE (l), unsigned_char_dynarr *dst,
|
|
4096
|
576 enum unicode_type type, unsigned int little_endian,
|
|
|
577 int write_error_characters_as_such);
|
|
|
578
|
|
|
579 #define UNICODE_ERROR_OCTET_RANGE_START 0x200000
|
|
|
580
|
|
|
581 #define valid_utf_16_first_surrogate(ch) (((ch) & 0xFC00) == 0xD800)
|
|
|
582 #define valid_utf_16_last_surrogate(ch) (((ch) & 0xFC00) == 0xDC00)
|
|
|
583 #define valid_utf_16_surrogate(ch) (((ch) & 0xF800) == 0xD800)
|
|
3439
|
584
|
|
3676
|
585 void set_charset_registries(Lisp_Object charset, Lisp_Object registries);
|
|
|
586
|
|
3439
|
587 EXFUN (Funicode_to_char, 2);
|
|
|
588 EXFUN (Fchar_to_unicode, 1);
|
|
|
589
|
|
771
|
590 #endif /* INCLUDED_charset_h_ */
|
