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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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61
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62 #else /* MULE */
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63
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64
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65 /************************************************************************/
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66 /* Definition of leading bytes */
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67 /************************************************************************/
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68
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69 #define MIN_LEADING_BYTE 0x7F
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70
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71 /** The following are for 1-byte characters in an official charset. **/
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72 enum LEADING_BYTE_OFFICIAL_1
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73 {
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74 MIN_LEADING_BYTE_OFFICIAL_1 = 0x80,
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75 /* LEADING_BYTE_LATIN_ISO8859_1 *MUST* be equal to
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76 MIN_LEADING_BYTE_OFFICIAL_1. */
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77 LEADING_BYTE_LATIN_ISO8859_1 = /* 0x80 Right half of ISO 8859-1 */
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78 MIN_LEADING_BYTE_OFFICIAL_1,
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79 LEADING_BYTE_LATIN_ISO8859_2, /* 0x81 Right half of ISO 8859-2 */
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80 LEADING_BYTE_LATIN_ISO8859_3, /* 0x82 Right half of ISO 8859-3 */
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81 LEADING_BYTE_LATIN_ISO8859_4, /* 0x83 Right half of ISO 8859-4 */
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82 LEADING_BYTE_THAI_TIS620, /* 0x84 TIS620-2533 */
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83 LEADING_BYTE_GREEK_ISO8859_7, /* 0x85 Right half of ISO 8859-7 */
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84 LEADING_BYTE_ARABIC_ISO8859_6, /* 0x86 Right half of ISO 8859-6 */
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85 LEADING_BYTE_HEBREW_ISO8859_8, /* 0x87 Right half of ISO 8859-8 */
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86 LEADING_BYTE_KATAKANA_JISX0201, /* 0x88 Right half of JIS X0201-1976 */
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87 LEADING_BYTE_LATIN_JISX0201, /* 0x89 Left half of JIS X0201-1976 */
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88 LEADING_BYTE_CYRILLIC_ISO8859_5,/* 0x8A Right half of ISO 8859-5 */
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89 LEADING_BYTE_LATIN_ISO8859_9, /* 0x8B Right half of ISO 8859-9 */
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90 LEADING_BYTE_LATIN_ISO8859_15, /* 0x8C Right half of ISO 8859-15 */
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91 #ifdef ENABLE_COMPOSITE_CHARS
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92 LEADING_BYTE_COMPOSITE, /* 0x8D For a composite character */
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93 MAX_LEADING_BYTE_OFFICIAL_1 =
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94 LEADING_BYTE_COMPOSITE - 1,
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95 #else
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96 /* Does not need to be the last entry, but simplifies things */
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97 LEADING_BYTE_COMPOSITE_REPLACEMENT, /* 0x8D Replaces ESC 0 - ESC 4 in a
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98 buffer */
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99 MAX_LEADING_BYTE_OFFICIAL_1 =
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100 LEADING_BYTE_COMPOSITE_REPLACEMENT,
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101 #endif
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102 /* 0x8E Unused */
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103 };
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104
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105 /* These next 2 + LEADING_BYTE_COMPOSITE need special treatment in a string
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106 and/or character */
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107
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108 #define LEADING_BYTE_ASCII 0x7F /* Not used except in arrays
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109 indexed by leading byte */
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110 #define LEADING_BYTE_CONTROL_1 0x8F /* represent normal 80-9F */
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111
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112 /** The following are for 2-byte characters in an official charset. **/
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113 enum LEADING_BYTE_OFFICIAL_2
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114 {
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115 MIN_LEADING_BYTE_OFFICIAL_2 = 0x90,
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116 LEADING_BYTE_JAPANESE_JISX0208_1978 =
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117 MIN_LEADING_BYTE_OFFICIAL_2, /* 0x90 Japanese JIS X0208-1978 */
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118 LEADING_BYTE_CHINESE_GB2312, /* 0x91 Chinese Hanzi GB2312-1980 */
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119 LEADING_BYTE_JAPANESE_JISX0208, /* 0x92 Japanese JIS X0208-1983 */
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120 LEADING_BYTE_KOREAN_KSC5601, /* 0x93 Hangul KS C5601-1987 */
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121 LEADING_BYTE_JAPANESE_JISX0212, /* 0x94 Japanese JIS X0212-1990 */
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122 LEADING_BYTE_CHINESE_CNS11643_1, /* 0x95 Chinese CNS11643 Set 1 */
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123 LEADING_BYTE_CHINESE_CNS11643_2, /* 0x96 Chinese CNS11643 Set 2 */
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124 LEADING_BYTE_CHINESE_BIG5_1, /* 0x97 Big5 Level 1 */
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125 LEADING_BYTE_CHINESE_BIG5_2, /* 0x98 Big5 Level 2 */
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126 MAX_LEADING_BYTE_OFFICIAL_2 =
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127 LEADING_BYTE_CHINESE_BIG5_2,
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128
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129 /* 0x99 unused */
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130 /* 0x9A unused */
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131 /* 0x9B unused */
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132 /* 0x9C unused */
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133 /* 0x9D unused */
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134 };
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135
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136
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137 /** The following are for 1- and 2-byte characters in a private charset. **/
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138
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139 #define PRE_LEADING_BYTE_PRIVATE_1 0x9E /* 1-byte char-set */
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140 #define PRE_LEADING_BYTE_PRIVATE_2 0x9F /* 2-byte char-set */
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141
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142 #define MIN_LEADING_BYTE_PRIVATE_1 0xA0
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143 #define MAX_LEADING_BYTE_PRIVATE_1 0xEF
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144 #define MIN_LEADING_BYTE_PRIVATE_2 0xF0
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145 #define MAX_LEADING_BYTE_PRIVATE_2 0xFF
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146
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147 #define NUM_LEADING_BYTES 129
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148
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149
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150 /************************************************************************/
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151 /* Operations on leading bytes */
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152 /************************************************************************/
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153
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154 /* Is this leading byte for a private charset? */
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155
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826
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156 #define leading_byte_private_p(lb) ((lb) >= MIN_LEADING_BYTE_PRIVATE_1)
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771
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157
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158 /* Is this a prefix for a private leading byte? */
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159
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826
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160 DECLARE_INLINE_HEADER (
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161 int
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867
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162 leading_byte_prefix_p (Ibyte lb)
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826
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163 )
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771
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164 {
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165 return (lb == PRE_LEADING_BYTE_PRIVATE_1 ||
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166 lb == PRE_LEADING_BYTE_PRIVATE_2);
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167 }
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168
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169 /* Given a private leading byte, return the leading byte prefix stored
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170 in a string. */
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171
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826
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172 #define private_leading_byte_prefix(lb) \
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771
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173 ((unsigned int) (lb) < MIN_LEADING_BYTE_PRIVATE_2 ? \
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174 PRE_LEADING_BYTE_PRIVATE_1 : \
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175 PRE_LEADING_BYTE_PRIVATE_2)
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176
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177
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178 /************************************************************************/
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179 /* Information about a particular character set */
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180 /************************************************************************/
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181
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182 struct Lisp_Charset
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183 {
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2720
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184 #ifdef MC_ALLOC
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185 struct lrecord_header header;
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186 #else /* MC_ALLOC */
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771
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187 struct lcrecord_header header;
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2720
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188 #endif /* MC_ALLOC */
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771
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189
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190 int id;
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191 Lisp_Object name;
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192 Lisp_Object doc_string;
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193 Lisp_Object registry;
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194 Lisp_Object short_name;
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195 Lisp_Object long_name;
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196
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197 Lisp_Object reverse_direction_charset;
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198
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199 Lisp_Object ccl_program;
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200
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2367
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201 /* Unicode translation tables. See unicode.c for the format of these
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202 tables, and discussion of how they are initialized.
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203 */
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771
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204 void *to_unicode_table;
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205 void *from_unicode_table;
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206 int from_unicode_levels;
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207
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2367
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208 /* Final byte of this character set in ISO2022 designating escape
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209 sequence */
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867
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210 Ibyte final;
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771
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211
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212 /* Number of bytes (1 - 4) required in the internal representation
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213 for characters in this character set. This is *not* the
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214 same as the dimension of the character set). */
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215 int rep_bytes;
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216
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217 /* Number of columns a character in this charset takes up, on TTY
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218 devices. Not used for X devices. */
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219 int columns;
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220
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221 /* Direction of this character set */
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222 int direction;
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223
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224 /* Type of this character set (94, 96, 94x94, 96x96) */
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225 int type;
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226
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227 /* Number of bytes used in encoding of this character set (1 or 2) */
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228 int dimension;
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229
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230 /* Number of chars in each dimension (usually 94 or 96) */
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231 int chars;
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232
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233 /* Which half of font to be used to display this character set */
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234 int graphic;
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235
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236 /* If set, this is a "temporary" charset created when we encounter
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237 an unknown final. This is so that we can successfully compile
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238 and load such files. We allow a real charset to be created on top
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239 of this temporary charset. */
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240 unsigned int temporary :1;
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241 };
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242 typedef struct Lisp_Charset Lisp_Charset;
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243
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244 DECLARE_LRECORD (charset, Lisp_Charset);
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245 #define XCHARSET(x) XRECORD (x, charset, Lisp_Charset)
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246 #define wrap_charset(p) wrap_record (p, charset)
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247 #define CHARSETP(x) RECORDP (x, charset)
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248 #define CHECK_CHARSET(x) CHECK_RECORD (x, charset)
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249 #define CONCHECK_CHARSET(x) CONCHECK_RECORD (x, charset)
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250
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251 #define CHARSET_TYPE_94 0 /* This charset includes 94 characters. */
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252 #define CHARSET_TYPE_96 1 /* This charset includes 96 characters. */
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253 #define CHARSET_TYPE_94X94 2 /* This charset includes 94x94 characters. */
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254 #define CHARSET_TYPE_96X96 3 /* This charset includes 96x96 characters. */
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255
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256 #define CHARSET_LEFT_TO_RIGHT 0
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257 #define CHARSET_RIGHT_TO_LEFT 1
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258
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259 /* Leading byte and id have been regrouped. -- OG */
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260 #define CHARSET_ID(cs) ((cs)->id)
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867
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261 #define CHARSET_LEADING_BYTE(cs) ((Ibyte) CHARSET_ID (cs))
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771
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262 #define CHARSET_NAME(cs) ((cs)->name)
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263 #define CHARSET_SHORT_NAME(cs) ((cs)->short_name)
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264 #define CHARSET_LONG_NAME(cs) ((cs)->long_name)
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265 #define CHARSET_REP_BYTES(cs) ((cs)->rep_bytes)
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266 #define CHARSET_COLUMNS(cs) ((cs)->columns)
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267 #define CHARSET_GRAPHIC(cs) ((cs)->graphic)
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268 #define CHARSET_TYPE(cs) ((cs)->type)
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269 #define CHARSET_DIRECTION(cs) ((cs)->direction)
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270 #define CHARSET_FINAL(cs) ((cs)->final)
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271 #define CHARSET_DOC_STRING(cs) ((cs)->doc_string)
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272 #define CHARSET_REGISTRY(cs) ((cs)->registry)
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273 #define CHARSET_CCL_PROGRAM(cs) ((cs)->ccl_program)
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274 #define CHARSET_DIMENSION(cs) ((cs)->dimension)
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275 #define CHARSET_CHARS(cs) ((cs)->chars)
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276 #define CHARSET_REVERSE_DIRECTION_CHARSET(cs) ((cs)->reverse_direction_charset)
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277 #define CHARSET_TO_UNICODE_TABLE(cs) ((cs)->to_unicode_table)
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278 #define CHARSET_FROM_UNICODE_TABLE(cs) ((cs)->from_unicode_table)
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279 #define CHARSET_FROM_UNICODE_LEVELS(cs) ((cs)->from_unicode_levels)
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280
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281
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826
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282 #define CHARSET_PRIVATE_P(cs) leading_byte_private_p (CHARSET_LEADING_BYTE (cs))
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771
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283
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284 #define XCHARSET_ID(cs) CHARSET_ID (XCHARSET (cs))
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285 #define XCHARSET_NAME(cs) CHARSET_NAME (XCHARSET (cs))
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286 #define XCHARSET_SHORT_NAME(cs) CHARSET_SHORT_NAME (XCHARSET (cs))
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287 #define XCHARSET_LONG_NAME(cs) CHARSET_LONG_NAME (XCHARSET (cs))
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288 #define XCHARSET_REP_BYTES(cs) CHARSET_REP_BYTES (XCHARSET (cs))
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289 #define XCHARSET_COLUMNS(cs) CHARSET_COLUMNS (XCHARSET (cs))
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290 #define XCHARSET_GRAPHIC(cs) CHARSET_GRAPHIC (XCHARSET (cs))
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291 #define XCHARSET_TYPE(cs) CHARSET_TYPE (XCHARSET (cs))
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292 #define XCHARSET_DIRECTION(cs) CHARSET_DIRECTION (XCHARSET (cs))
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293 #define XCHARSET_FINAL(cs) CHARSET_FINAL (XCHARSET (cs))
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294 #define XCHARSET_DOC_STRING(cs) CHARSET_DOC_STRING (XCHARSET (cs))
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295 #define XCHARSET_REGISTRY(cs) CHARSET_REGISTRY (XCHARSET (cs))
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296 #define XCHARSET_LEADING_BYTE(cs) CHARSET_LEADING_BYTE (XCHARSET (cs))
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297 #define XCHARSET_CCL_PROGRAM(cs) CHARSET_CCL_PROGRAM (XCHARSET (cs))
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298 #define XCHARSET_DIMENSION(cs) CHARSET_DIMENSION (XCHARSET (cs))
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299 #define XCHARSET_CHARS(cs) CHARSET_CHARS (XCHARSET (cs))
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300 #define XCHARSET_PRIVATE_P(cs) CHARSET_PRIVATE_P (XCHARSET (cs))
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301 #define XCHARSET_REVERSE_DIRECTION_CHARSET(cs) \
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302 CHARSET_REVERSE_DIRECTION_CHARSET (XCHARSET (cs))
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303 #define XCHARSET_TO_UNICODE_TABLE(cs) \
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304 CHARSET_TO_UNICODE_TABLE (XCHARSET (cs))
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305 #define XCHARSET_FROM_UNICODE_TABLE(cs) \
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306 CHARSET_FROM_UNICODE_TABLE (XCHARSET (cs))
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307 #define XCHARSET_FROM_UNICODE_LEVELS(cs) \
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308 CHARSET_FROM_UNICODE_LEVELS (XCHARSET (cs))
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309
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310 struct charset_lookup
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311 {
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312 /* Table of charsets indexed by leading byte. */
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313 Lisp_Object charset_by_leading_byte[NUM_LEADING_BYTES];
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314
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315 /* Table of charsets indexed by type/final-byte/direction. */
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316 Lisp_Object charset_by_attributes[4][128][2];
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867
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317 Ibyte next_allocated_1_byte_leading_byte;
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318 Ibyte next_allocated_2_byte_leading_byte;
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771
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319 };
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320
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1111
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321 extern struct charset_lookup *chlook;
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322
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826
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323 DECLARE_INLINE_HEADER (
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324 Lisp_Object
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325 charset_by_leading_byte (int lb)
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326 )
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771
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327 {
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800
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328 #ifdef ERROR_CHECK_TEXT
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771
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329 /* When error-checking is on, x86 GCC 2.95.2 -O3 miscompiles the
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330 following unless we introduce `tem'. */
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331 int tem = lb;
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800
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332 text_checking_assert (tem >= MIN_LEADING_BYTE && tem <= 0xFF);
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771
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333 #endif
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334 return chlook->charset_by_leading_byte[lb - MIN_LEADING_BYTE];
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335 }
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336
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826
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337 DECLARE_INLINE_HEADER (
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338 Lisp_Object
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339 charset_by_attributes (int type, int final, int dir)
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340 )
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771
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341 {
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342 type_checking_assert (type < countof (chlook->charset_by_attributes) &&
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343 final < countof (chlook->charset_by_attributes[0]) &&
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344 dir < countof (chlook->charset_by_attributes[0][0]));
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345 return chlook->charset_by_attributes[type][final][dir];
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346 }
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347
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348
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349 /************************************************************************/
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350 /* Dealing with characters */
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351 /************************************************************************/
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352
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353 /* The bit fields of character are divided into 3 parts:
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354 FIELD1(5bits):FIELD2(7bits):FIELD3(7bits) */
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355
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867
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356 #define ICHAR_FIELD1_MASK (0x1F << 14)
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357 #define ICHAR_FIELD2_MASK (0x7F << 7)
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358 #define ICHAR_FIELD3_MASK 0x7F
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771
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359
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360 /* Macros to access each field of a character code of C. */
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361
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867
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362 #define ichar_field1(c) (((c) & ICHAR_FIELD1_MASK) >> 14)
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363 #define ichar_field2(c) (((c) & ICHAR_FIELD2_MASK) >> 7)
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364 #define ichar_field3(c) ((c) & ICHAR_FIELD3_MASK)
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771
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365
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366 /* Field 1, if non-zero, usually holds a leading byte for a
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367 dimension-2 charset. Field 2, if non-zero, usually holds a leading
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368 byte for a dimension-1 charset. */
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369
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370 /* Converting between field values and leading bytes. */
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371
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372 #define FIELD2_TO_OFFICIAL_LEADING_BYTE (MIN_LEADING_BYTE_OFFICIAL_1 - 1)
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373 #define FIELD2_TO_PRIVATE_LEADING_BYTE 0x80
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374
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375 #define FIELD1_TO_OFFICIAL_LEADING_BYTE (MIN_LEADING_BYTE_OFFICIAL_2 - 1)
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376 #define FIELD1_TO_PRIVATE_LEADING_BYTE 0xE1
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377
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378 /* Minimum and maximum allowed values for the fields. */
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379
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867
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380 #define MIN_ICHAR_FIELD2_OFFICIAL \
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771
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381 (MIN_LEADING_BYTE_OFFICIAL_1 - FIELD2_TO_OFFICIAL_LEADING_BYTE)
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867
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382 #define MAX_ICHAR_FIELD2_OFFICIAL \
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771
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383 (MAX_LEADING_BYTE_OFFICIAL_1 - FIELD2_TO_OFFICIAL_LEADING_BYTE)
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384
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867
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385 #define MIN_ICHAR_FIELD1_OFFICIAL \
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771
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386 (MIN_LEADING_BYTE_OFFICIAL_2 - FIELD1_TO_OFFICIAL_LEADING_BYTE)
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867
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387 #define MAX_ICHAR_FIELD1_OFFICIAL \
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771
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388 (MAX_LEADING_BYTE_OFFICIAL_2 - FIELD1_TO_OFFICIAL_LEADING_BYTE)
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389
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867
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390 #define MIN_ICHAR_FIELD2_PRIVATE \
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771
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391 (MIN_LEADING_BYTE_PRIVATE_1 - FIELD2_TO_PRIVATE_LEADING_BYTE)
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867
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392 #define MAX_ICHAR_FIELD2_PRIVATE \
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771
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393 (MAX_LEADING_BYTE_PRIVATE_1 - FIELD2_TO_PRIVATE_LEADING_BYTE)
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394
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867
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395 #define MIN_ICHAR_FIELD1_PRIVATE \
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771
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396 (MIN_LEADING_BYTE_PRIVATE_2 - FIELD1_TO_PRIVATE_LEADING_BYTE)
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867
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397 #define MAX_ICHAR_FIELD1_PRIVATE \
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771
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398 (MAX_LEADING_BYTE_PRIVATE_2 - FIELD1_TO_PRIVATE_LEADING_BYTE)
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399
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400 /* Minimum character code of each <type> character. */
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401
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867
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402 #define MIN_CHAR_OFFICIAL_TYPE9N (MIN_ICHAR_FIELD2_OFFICIAL << 7)
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403 #define MIN_CHAR_PRIVATE_TYPE9N (MIN_ICHAR_FIELD2_PRIVATE << 7)
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404 #define MIN_CHAR_OFFICIAL_TYPE9NX9N (MIN_ICHAR_FIELD1_OFFICIAL << 14)
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405 #define MIN_CHAR_PRIVATE_TYPE9NX9N (MIN_ICHAR_FIELD1_PRIVATE << 14)
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771
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406 #define MIN_CHAR_COMPOSITION (0x1F << 14)
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407
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408 /* Leading byte of a character.
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409
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410 NOTE: This takes advantage of the fact that
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411 FIELD2_TO_OFFICIAL_LEADING_BYTE and
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412 FIELD2_TO_PRIVATE_LEADING_BYTE are the same.
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413 */
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414
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826
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415 DECLARE_INLINE_HEADER (
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867
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416 Ibyte
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417 ichar_leading_byte (Ichar c)
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826
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418 )
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771
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419 {
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867
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420 if (ichar_ascii_p (c))
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771
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421 return LEADING_BYTE_ASCII;
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422 else if (c < 0xA0)
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423 return LEADING_BYTE_CONTROL_1;
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424 else if (c < MIN_CHAR_OFFICIAL_TYPE9NX9N)
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867
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425 return ichar_field2 (c) + FIELD2_TO_OFFICIAL_LEADING_BYTE;
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771
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426 else if (c < MIN_CHAR_PRIVATE_TYPE9NX9N)
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867
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427 return ichar_field1 (c) + FIELD1_TO_OFFICIAL_LEADING_BYTE;
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771
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428 else if (c < MIN_CHAR_COMPOSITION)
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867
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429 return ichar_field1 (c) + FIELD1_TO_PRIVATE_LEADING_BYTE;
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771
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430 else
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431 {
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432 #ifdef ENABLE_COMPOSITE_CHARS
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433 return LEADING_BYTE_COMPOSITE;
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434 #else
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2500
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435 ABORT();
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771
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436 return 0;
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437 #endif /* ENABLE_COMPOSITE_CHARS */
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438 }
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439 }
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440
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826
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441 DECLARE_INLINE_HEADER (
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442 Bytecount
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867
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443 ichar_len (Ichar c)
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826
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444 )
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445 {
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867
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446 if (ichar_ascii_p (c))
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826
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447 return 1;
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448 else if (c < MIN_CHAR_OFFICIAL_TYPE9NX9N)
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449 return 2;
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450 else if (c < MIN_CHAR_PRIVATE_TYPE9NX9N)
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451 return 3; /* dimension-2 official or dimension-1 private */
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452 else if (c < MIN_CHAR_COMPOSITION)
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453 return 4;
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454 else
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455 {
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456 #ifdef ENABLE_COMPOSITE_CHARS
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457 #error Not yet implemented
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458 #else
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2500
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459 ABORT();
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826
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460 return 0;
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461 #endif /* ENABLE_COMPOSITE_CHARS */
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462 }
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463 }
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464
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465 DECLARE_INLINE_HEADER (
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466 Bytecount
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867
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467 ichar_len_fmt (Ichar c, Internal_Format fmt)
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826
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468 )
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469 {
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470 switch (fmt)
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471 {
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472 case FORMAT_DEFAULT:
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867
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473 return ichar_len (c);
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826
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474 case FORMAT_16_BIT_FIXED:
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475 return 2;
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476 case FORMAT_32_BIT_FIXED:
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477 return 4;
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478 default:
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479 text_checking_assert (fmt == FORMAT_8_BIT_FIXED);
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480 return 1;
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481 }
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482 }
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483
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|
867
|
484 #define ichar_charset(c) charset_by_leading_byte (ichar_leading_byte (c))
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771
|
485
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486 /* Return a character whose charset is CHARSET and position-codes are C1
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487 and C2. TYPE9N character ignores C2. (For typical charsets, i.e. not
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488 ASCII, Control-1 or Composite, C1 and C2 will be in the range of 32 to
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489 127 or 33 to 126. See `make-char'.)
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490
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491 NOTE: This takes advantage of the fact that
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492 FIELD2_TO_OFFICIAL_LEADING_BYTE and
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493 FIELD2_TO_PRIVATE_LEADING_BYTE are the same.
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494 */
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495
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|
826
|
496 DECLARE_INLINE_HEADER (
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|
867
|
497 Ichar
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|
498 make_ichar (Lisp_Object charset, int c1, int c2)
|
|
826
|
499 )
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771
|
500 {
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867
|
501 Ichar retval;
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771
|
502 if (EQ (charset, Vcharset_ascii))
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826
|
503 retval = c1;
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771
|
504 else if (EQ (charset, Vcharset_control_1))
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826
|
505 retval = c1 | 0x80;
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771
|
506 #ifdef ENABLE_COMPOSITE_CHARS
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507 else if (EQ (charset, Vcharset_composite))
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826
|
508 retval = (0x1F << 14) | ((c1) << 7) | (c2);
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771
|
509 #endif
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510 else if (XCHARSET_DIMENSION (charset) == 1)
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826
|
511 retval = ((XCHARSET_LEADING_BYTE (charset) -
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512 FIELD2_TO_OFFICIAL_LEADING_BYTE) << 7) | (c1);
|
|
771
|
513 else if (!XCHARSET_PRIVATE_P (charset))
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826
|
514 retval = ((XCHARSET_LEADING_BYTE (charset) -
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515 FIELD1_TO_OFFICIAL_LEADING_BYTE) << 14) | ((c1) << 7) | (c2);
|
|
771
|
516 else
|
|
826
|
517 retval = ((XCHARSET_LEADING_BYTE (charset) -
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|
518 FIELD1_TO_PRIVATE_LEADING_BYTE) << 14) | ((c1) << 7) | (c2);
|
|
867
|
519 text_checking_assert (valid_ichar_p (retval));
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|
826
|
520 return retval;
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|
771
|
521 }
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522
|
|
867
|
523 /* BREAKUP_ICHAR_1_UNSAFE assumes that the charset has already been
|
|
771
|
524 calculated, and just computes c1 and c2.
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|
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525
|
|
867
|
526 BREAKUP_ICHAR also computes and stores the charset. */
|
|
771
|
527
|
|
867
|
528 #define BREAKUP_ICHAR_1_UNSAFE(c, charset, c1, c2) \
|
|
771
|
529 XCHARSET_DIMENSION (charset) == 1 \
|
|
867
|
530 ? ((c1) = ichar_field3 (c), (c2) = 0) \
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|
|
531 : ((c1) = ichar_field2 (c), \
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|
|
532 (c2) = ichar_field3 (c))
|
|
771
|
533
|
|
826
|
534 DECLARE_INLINE_HEADER (
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|
|
535 void
|
|
867
|
536 breakup_ichar_1 (Ichar c, Lisp_Object *charset, int *c1, int *c2)
|
|
826
|
537 )
|
|
771
|
538 {
|
|
867
|
539 text_checking_assert (valid_ichar_p (c));
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|
|
540 *charset = ichar_charset (c);
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|
|
541 BREAKUP_ICHAR_1_UNSAFE (c, *charset, *c1, *c2);
|
|
771
|
542 }
|
|
|
543
|
|
867
|
544 /* BREAKUP_ICHAR separates an Ichar into its components. The charset of
|
|
771
|
545 character C is set to CHARSET, and the position-codes of C are set to C1
|
|
|
546 and C2. C2 of TYPE9N character is 0. */
|
|
|
547
|
|
867
|
548 #define BREAKUP_ICHAR(c, charset, c1, c2) \
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|
|
549 breakup_ichar_1 (c, &(charset), &(c1), &(c2))
|
|
771
|
550
|
|
788
|
551 void get_charset_limits (Lisp_Object charset, int *low, int *high);
|
|
867
|
552 int ichar_to_unicode (Ichar chr);
|
|
788
|
553
|
|
771
|
554 #endif /* MULE */
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|
|
555
|
|
|
556 #endif /* INCLUDED_charset_h_ */
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