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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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184 struct lcrecord_header header;
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185
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186 int id;
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187 Lisp_Object name;
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188 Lisp_Object doc_string;
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189 Lisp_Object registry;
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190 Lisp_Object short_name;
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191 Lisp_Object long_name;
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192
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193 Lisp_Object reverse_direction_charset;
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194
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195 Lisp_Object ccl_program;
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196
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197 /* Unicode translation tables. See unicode.c for the format of these tables.
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198
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199 NOTE ABOUT DUMPING: We don't currently dump these tables. For one
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200 thing, they're big, and it's very fast to recreate them (a fraction of
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201 a second on modern processors); for another, there isn't currently
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202 support in pdump for this. (At one point I started writing it, in the
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203 form of XD_UNION, but thought better of it.) In order to avoid pdump
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204 problems (and to make the dump data smaller), we free all the tables
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205 at dump time (using the disksave finalization method), set them to
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206 zero, and reinit them to blank when we start up again; they will be
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207 reloaded when `init-mule-at-startup' is called.
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208
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209 #### This creates a problem w.r.t. user-defined charsets. It would be
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210 inconvenient to require all dumped user-defined charsets to be
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211 reloaded at init time, but that's what currently needs to be done.
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212 The solution is either to go ahead and create pdump support for
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213 dumping the tables, and use it just for these; or to copy the data in
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214 them into a compressed format, write it out to pdump as a single
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215 opaque block, and undo the operation at startup.
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216
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217 #### There's another problem, having to do with starting up in a
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218 non-ISO-8859-1 directory. We don't load the tables until after we've
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219 parsed the current directories, and we run into a real bootstrapping
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220 problem trying to solve this. Either we'll have to dump all the
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221 tables as-is or make some special provisions for writing extra binary
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222 data into the pdump data, and do the compressed trick mentioned above
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223 for all the tables. */
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224 void *to_unicode_table;
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225 void *from_unicode_table;
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226 int from_unicode_levels;
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227
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228 unsigned char unicode_table_loaded;
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229
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230 /* Final byte of this character set in ISO2022 designating escape sequence */
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867
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231 Ibyte final;
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771
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232
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233 /* Number of bytes (1 - 4) required in the internal representation
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234 for characters in this character set. This is *not* the
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235 same as the dimension of the character set). */
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236 int rep_bytes;
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237
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238 /* Number of columns a character in this charset takes up, on TTY
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239 devices. Not used for X devices. */
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240 int columns;
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241
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242 /* Direction of this character set */
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243 int direction;
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244
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245 /* Type of this character set (94, 96, 94x94, 96x96) */
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246 int type;
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247
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248 /* Number of bytes used in encoding of this character set (1 or 2) */
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249 int dimension;
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250
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251 /* Number of chars in each dimension (usually 94 or 96) */
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252 int chars;
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253
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254 /* Which half of font to be used to display this character set */
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255 int graphic;
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256
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257 /* If set, this is a "temporary" charset created when we encounter
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258 an unknown final. This is so that we can successfully compile
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259 and load such files. We allow a real charset to be created on top
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260 of this temporary charset. */
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261 unsigned int temporary :1;
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262 };
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263 typedef struct Lisp_Charset Lisp_Charset;
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264
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265 DECLARE_LRECORD (charset, Lisp_Charset);
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266 #define XCHARSET(x) XRECORD (x, charset, Lisp_Charset)
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267 #define wrap_charset(p) wrap_record (p, charset)
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268 #define CHARSETP(x) RECORDP (x, charset)
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269 #define CHECK_CHARSET(x) CHECK_RECORD (x, charset)
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270 #define CONCHECK_CHARSET(x) CONCHECK_RECORD (x, charset)
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271
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272 #define CHARSET_TYPE_94 0 /* This charset includes 94 characters. */
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273 #define CHARSET_TYPE_96 1 /* This charset includes 96 characters. */
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274 #define CHARSET_TYPE_94X94 2 /* This charset includes 94x94 characters. */
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275 #define CHARSET_TYPE_96X96 3 /* This charset includes 96x96 characters. */
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276
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277 #define CHARSET_LEFT_TO_RIGHT 0
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278 #define CHARSET_RIGHT_TO_LEFT 1
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279
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280 /* Leading byte and id have been regrouped. -- OG */
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281 #define CHARSET_ID(cs) ((cs)->id)
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867
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282 #define CHARSET_LEADING_BYTE(cs) ((Ibyte) CHARSET_ID (cs))
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771
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283 #define CHARSET_NAME(cs) ((cs)->name)
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284 #define CHARSET_SHORT_NAME(cs) ((cs)->short_name)
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285 #define CHARSET_LONG_NAME(cs) ((cs)->long_name)
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286 #define CHARSET_REP_BYTES(cs) ((cs)->rep_bytes)
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287 #define CHARSET_COLUMNS(cs) ((cs)->columns)
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288 #define CHARSET_GRAPHIC(cs) ((cs)->graphic)
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289 #define CHARSET_TYPE(cs) ((cs)->type)
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290 #define CHARSET_DIRECTION(cs) ((cs)->direction)
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291 #define CHARSET_FINAL(cs) ((cs)->final)
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292 #define CHARSET_DOC_STRING(cs) ((cs)->doc_string)
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293 #define CHARSET_REGISTRY(cs) ((cs)->registry)
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294 #define CHARSET_CCL_PROGRAM(cs) ((cs)->ccl_program)
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295 #define CHARSET_DIMENSION(cs) ((cs)->dimension)
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296 #define CHARSET_CHARS(cs) ((cs)->chars)
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297 #define CHARSET_REVERSE_DIRECTION_CHARSET(cs) ((cs)->reverse_direction_charset)
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298 #define CHARSET_TO_UNICODE_TABLE(cs) ((cs)->to_unicode_table)
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299 #define CHARSET_FROM_UNICODE_TABLE(cs) ((cs)->from_unicode_table)
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300 #define CHARSET_FROM_UNICODE_LEVELS(cs) ((cs)->from_unicode_levels)
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301
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302
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826
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303 #define CHARSET_PRIVATE_P(cs) leading_byte_private_p (CHARSET_LEADING_BYTE (cs))
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771
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304
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305 #define XCHARSET_ID(cs) CHARSET_ID (XCHARSET (cs))
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306 #define XCHARSET_NAME(cs) CHARSET_NAME (XCHARSET (cs))
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307 #define XCHARSET_SHORT_NAME(cs) CHARSET_SHORT_NAME (XCHARSET (cs))
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308 #define XCHARSET_LONG_NAME(cs) CHARSET_LONG_NAME (XCHARSET (cs))
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309 #define XCHARSET_REP_BYTES(cs) CHARSET_REP_BYTES (XCHARSET (cs))
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310 #define XCHARSET_COLUMNS(cs) CHARSET_COLUMNS (XCHARSET (cs))
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311 #define XCHARSET_GRAPHIC(cs) CHARSET_GRAPHIC (XCHARSET (cs))
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312 #define XCHARSET_TYPE(cs) CHARSET_TYPE (XCHARSET (cs))
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313 #define XCHARSET_DIRECTION(cs) CHARSET_DIRECTION (XCHARSET (cs))
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314 #define XCHARSET_FINAL(cs) CHARSET_FINAL (XCHARSET (cs))
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315 #define XCHARSET_DOC_STRING(cs) CHARSET_DOC_STRING (XCHARSET (cs))
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316 #define XCHARSET_REGISTRY(cs) CHARSET_REGISTRY (XCHARSET (cs))
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317 #define XCHARSET_LEADING_BYTE(cs) CHARSET_LEADING_BYTE (XCHARSET (cs))
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318 #define XCHARSET_CCL_PROGRAM(cs) CHARSET_CCL_PROGRAM (XCHARSET (cs))
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319 #define XCHARSET_DIMENSION(cs) CHARSET_DIMENSION (XCHARSET (cs))
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320 #define XCHARSET_CHARS(cs) CHARSET_CHARS (XCHARSET (cs))
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321 #define XCHARSET_PRIVATE_P(cs) CHARSET_PRIVATE_P (XCHARSET (cs))
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322 #define XCHARSET_REVERSE_DIRECTION_CHARSET(cs) \
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323 CHARSET_REVERSE_DIRECTION_CHARSET (XCHARSET (cs))
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324 #define XCHARSET_TO_UNICODE_TABLE(cs) \
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325 CHARSET_TO_UNICODE_TABLE (XCHARSET (cs))
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326 #define XCHARSET_FROM_UNICODE_TABLE(cs) \
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327 CHARSET_FROM_UNICODE_TABLE (XCHARSET (cs))
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328 #define XCHARSET_FROM_UNICODE_LEVELS(cs) \
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329 CHARSET_FROM_UNICODE_LEVELS (XCHARSET (cs))
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330
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331 struct charset_lookup
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332 {
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333 /* Table of charsets indexed by leading byte. */
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334 Lisp_Object charset_by_leading_byte[NUM_LEADING_BYTES];
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335
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336 /* Table of charsets indexed by type/final-byte/direction. */
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337 Lisp_Object charset_by_attributes[4][128][2];
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867
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338 Ibyte next_allocated_1_byte_leading_byte;
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339 Ibyte next_allocated_2_byte_leading_byte;
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771
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340 };
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341
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1111
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342 extern struct charset_lookup *chlook;
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343
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826
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344 DECLARE_INLINE_HEADER (
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345 Lisp_Object
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346 charset_by_leading_byte (int lb)
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347 )
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771
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348 {
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800
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349 #ifdef ERROR_CHECK_TEXT
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771
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350 /* When error-checking is on, x86 GCC 2.95.2 -O3 miscompiles the
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351 following unless we introduce `tem'. */
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352 int tem = lb;
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800
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353 text_checking_assert (tem >= MIN_LEADING_BYTE && tem <= 0xFF);
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771
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354 #endif
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355 return chlook->charset_by_leading_byte[lb - MIN_LEADING_BYTE];
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356 }
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357
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826
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358 DECLARE_INLINE_HEADER (
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359 Lisp_Object
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360 charset_by_attributes (int type, int final, int dir)
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361 )
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771
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362 {
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363 type_checking_assert (type < countof (chlook->charset_by_attributes) &&
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364 final < countof (chlook->charset_by_attributes[0]) &&
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365 dir < countof (chlook->charset_by_attributes[0][0]));
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366 return chlook->charset_by_attributes[type][final][dir];
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367 }
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368
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369
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370 /************************************************************************/
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371 /* Dealing with characters */
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372 /************************************************************************/
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373
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374 /* The bit fields of character are divided into 3 parts:
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375 FIELD1(5bits):FIELD2(7bits):FIELD3(7bits) */
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376
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867
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377 #define ICHAR_FIELD1_MASK (0x1F << 14)
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378 #define ICHAR_FIELD2_MASK (0x7F << 7)
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379 #define ICHAR_FIELD3_MASK 0x7F
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771
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380
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381 /* Macros to access each field of a character code of C. */
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382
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867
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383 #define ichar_field1(c) (((c) & ICHAR_FIELD1_MASK) >> 14)
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384 #define ichar_field2(c) (((c) & ICHAR_FIELD2_MASK) >> 7)
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385 #define ichar_field3(c) ((c) & ICHAR_FIELD3_MASK)
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771
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386
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387 /* Field 1, if non-zero, usually holds a leading byte for a
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388 dimension-2 charset. Field 2, if non-zero, usually holds a leading
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389 byte for a dimension-1 charset. */
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390
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391 /* Converting between field values and leading bytes. */
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392
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393 #define FIELD2_TO_OFFICIAL_LEADING_BYTE (MIN_LEADING_BYTE_OFFICIAL_1 - 1)
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394 #define FIELD2_TO_PRIVATE_LEADING_BYTE 0x80
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395
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396 #define FIELD1_TO_OFFICIAL_LEADING_BYTE (MIN_LEADING_BYTE_OFFICIAL_2 - 1)
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397 #define FIELD1_TO_PRIVATE_LEADING_BYTE 0xE1
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398
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399 /* Minimum and maximum allowed values for the fields. */
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400
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867
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401 #define MIN_ICHAR_FIELD2_OFFICIAL \
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771
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402 (MIN_LEADING_BYTE_OFFICIAL_1 - FIELD2_TO_OFFICIAL_LEADING_BYTE)
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867
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403 #define MAX_ICHAR_FIELD2_OFFICIAL \
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771
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404 (MAX_LEADING_BYTE_OFFICIAL_1 - FIELD2_TO_OFFICIAL_LEADING_BYTE)
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405
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867
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406 #define MIN_ICHAR_FIELD1_OFFICIAL \
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771
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407 (MIN_LEADING_BYTE_OFFICIAL_2 - FIELD1_TO_OFFICIAL_LEADING_BYTE)
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867
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408 #define MAX_ICHAR_FIELD1_OFFICIAL \
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771
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409 (MAX_LEADING_BYTE_OFFICIAL_2 - FIELD1_TO_OFFICIAL_LEADING_BYTE)
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410
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867
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411 #define MIN_ICHAR_FIELD2_PRIVATE \
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771
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412 (MIN_LEADING_BYTE_PRIVATE_1 - FIELD2_TO_PRIVATE_LEADING_BYTE)
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867
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413 #define MAX_ICHAR_FIELD2_PRIVATE \
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771
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414 (MAX_LEADING_BYTE_PRIVATE_1 - FIELD2_TO_PRIVATE_LEADING_BYTE)
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415
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867
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416 #define MIN_ICHAR_FIELD1_PRIVATE \
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771
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417 (MIN_LEADING_BYTE_PRIVATE_2 - FIELD1_TO_PRIVATE_LEADING_BYTE)
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867
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418 #define MAX_ICHAR_FIELD1_PRIVATE \
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771
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419 (MAX_LEADING_BYTE_PRIVATE_2 - FIELD1_TO_PRIVATE_LEADING_BYTE)
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420
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421 /* Minimum character code of each <type> character. */
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422
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867
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423 #define MIN_CHAR_OFFICIAL_TYPE9N (MIN_ICHAR_FIELD2_OFFICIAL << 7)
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424 #define MIN_CHAR_PRIVATE_TYPE9N (MIN_ICHAR_FIELD2_PRIVATE << 7)
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425 #define MIN_CHAR_OFFICIAL_TYPE9NX9N (MIN_ICHAR_FIELD1_OFFICIAL << 14)
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426 #define MIN_CHAR_PRIVATE_TYPE9NX9N (MIN_ICHAR_FIELD1_PRIVATE << 14)
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771
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427 #define MIN_CHAR_COMPOSITION (0x1F << 14)
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428
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429 /* Leading byte of a character.
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430
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431 NOTE: This takes advantage of the fact that
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432 FIELD2_TO_OFFICIAL_LEADING_BYTE and
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433 FIELD2_TO_PRIVATE_LEADING_BYTE are the same.
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434 */
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435
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826
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436 DECLARE_INLINE_HEADER (
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867
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437 Ibyte
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438 ichar_leading_byte (Ichar c)
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826
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439 )
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771
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440 {
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867
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441 if (ichar_ascii_p (c))
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771
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442 return LEADING_BYTE_ASCII;
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443 else if (c < 0xA0)
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444 return LEADING_BYTE_CONTROL_1;
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445 else if (c < MIN_CHAR_OFFICIAL_TYPE9NX9N)
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867
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446 return ichar_field2 (c) + FIELD2_TO_OFFICIAL_LEADING_BYTE;
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771
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447 else if (c < MIN_CHAR_PRIVATE_TYPE9NX9N)
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867
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448 return ichar_field1 (c) + FIELD1_TO_OFFICIAL_LEADING_BYTE;
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771
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449 else if (c < MIN_CHAR_COMPOSITION)
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867
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450 return ichar_field1 (c) + FIELD1_TO_PRIVATE_LEADING_BYTE;
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771
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451 else
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452 {
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453 #ifdef ENABLE_COMPOSITE_CHARS
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454 return LEADING_BYTE_COMPOSITE;
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455 #else
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456 abort();
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457 return 0;
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458 #endif /* ENABLE_COMPOSITE_CHARS */
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459 }
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460 }
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461
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826
|
462 DECLARE_INLINE_HEADER (
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463 Bytecount
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867
|
464 ichar_len (Ichar c)
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826
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465 )
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466 {
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867
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467 if (ichar_ascii_p (c))
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826
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468 return 1;
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469 else if (c < MIN_CHAR_OFFICIAL_TYPE9NX9N)
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470 return 2;
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471 else if (c < MIN_CHAR_PRIVATE_TYPE9NX9N)
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472 return 3; /* dimension-2 official or dimension-1 private */
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473 else if (c < MIN_CHAR_COMPOSITION)
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474 return 4;
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475 else
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476 {
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477 #ifdef ENABLE_COMPOSITE_CHARS
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478 #error Not yet implemented
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479 #else
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480 abort();
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481 return 0;
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482 #endif /* ENABLE_COMPOSITE_CHARS */
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483 }
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484 }
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485
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486 DECLARE_INLINE_HEADER (
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487 Bytecount
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867
|
488 ichar_len_fmt (Ichar c, Internal_Format fmt)
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826
|
489 )
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490 {
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491 switch (fmt)
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492 {
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493 case FORMAT_DEFAULT:
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867
|
494 return ichar_len (c);
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826
|
495 case FORMAT_16_BIT_FIXED:
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496 return 2;
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497 case FORMAT_32_BIT_FIXED:
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498 return 4;
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499 default:
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500 text_checking_assert (fmt == FORMAT_8_BIT_FIXED);
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501 return 1;
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502 }
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503 }
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504
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|
867
|
505 #define ichar_charset(c) charset_by_leading_byte (ichar_leading_byte (c))
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|
771
|
506
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507 /* Return a character whose charset is CHARSET and position-codes are C1
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508 and C2. TYPE9N character ignores C2. (For typical charsets, i.e. not
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509 ASCII, Control-1 or Composite, C1 and C2 will be in the range of 32 to
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510 127 or 33 to 126. See `make-char'.)
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511
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512 NOTE: This takes advantage of the fact that
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513 FIELD2_TO_OFFICIAL_LEADING_BYTE and
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514 FIELD2_TO_PRIVATE_LEADING_BYTE are the same.
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515 */
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516
|
|
826
|
517 DECLARE_INLINE_HEADER (
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|
867
|
518 Ichar
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|
|
519 make_ichar (Lisp_Object charset, int c1, int c2)
|
|
826
|
520 )
|
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771
|
521 {
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|
867
|
522 Ichar retval;
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|
771
|
523 if (EQ (charset, Vcharset_ascii))
|
|
826
|
524 retval = c1;
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|
771
|
525 else if (EQ (charset, Vcharset_control_1))
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|
826
|
526 retval = c1 | 0x80;
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771
|
527 #ifdef ENABLE_COMPOSITE_CHARS
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528 else if (EQ (charset, Vcharset_composite))
|
|
826
|
529 retval = (0x1F << 14) | ((c1) << 7) | (c2);
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|
771
|
530 #endif
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531 else if (XCHARSET_DIMENSION (charset) == 1)
|
|
826
|
532 retval = ((XCHARSET_LEADING_BYTE (charset) -
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|
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533 FIELD2_TO_OFFICIAL_LEADING_BYTE) << 7) | (c1);
|
|
771
|
534 else if (!XCHARSET_PRIVATE_P (charset))
|
|
826
|
535 retval = ((XCHARSET_LEADING_BYTE (charset) -
|
|
|
536 FIELD1_TO_OFFICIAL_LEADING_BYTE) << 14) | ((c1) << 7) | (c2);
|
|
771
|
537 else
|
|
826
|
538 retval = ((XCHARSET_LEADING_BYTE (charset) -
|
|
|
539 FIELD1_TO_PRIVATE_LEADING_BYTE) << 14) | ((c1) << 7) | (c2);
|
|
867
|
540 text_checking_assert (valid_ichar_p (retval));
|
|
826
|
541 return retval;
|
|
771
|
542 }
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|
|
543
|
|
867
|
544 /* BREAKUP_ICHAR_1_UNSAFE assumes that the charset has already been
|
|
771
|
545 calculated, and just computes c1 and c2.
|
|
|
546
|
|
867
|
547 BREAKUP_ICHAR also computes and stores the charset. */
|
|
771
|
548
|
|
867
|
549 #define BREAKUP_ICHAR_1_UNSAFE(c, charset, c1, c2) \
|
|
771
|
550 XCHARSET_DIMENSION (charset) == 1 \
|
|
867
|
551 ? ((c1) = ichar_field3 (c), (c2) = 0) \
|
|
|
552 : ((c1) = ichar_field2 (c), \
|
|
|
553 (c2) = ichar_field3 (c))
|
|
771
|
554
|
|
826
|
555 DECLARE_INLINE_HEADER (
|
|
|
556 void
|
|
867
|
557 breakup_ichar_1 (Ichar c, Lisp_Object *charset, int *c1, int *c2)
|
|
826
|
558 )
|
|
771
|
559 {
|
|
867
|
560 text_checking_assert (valid_ichar_p (c));
|
|
|
561 *charset = ichar_charset (c);
|
|
|
562 BREAKUP_ICHAR_1_UNSAFE (c, *charset, *c1, *c2);
|
|
771
|
563 }
|
|
|
564
|
|
867
|
565 /* BREAKUP_ICHAR separates an Ichar into its components. The charset of
|
|
771
|
566 character C is set to CHARSET, and the position-codes of C are set to C1
|
|
|
567 and C2. C2 of TYPE9N character is 0. */
|
|
|
568
|
|
867
|
569 #define BREAKUP_ICHAR(c, charset, c1, c2) \
|
|
|
570 breakup_ichar_1 (c, &(charset), &(c1), &(c2))
|
|
771
|
571
|
|
788
|
572 void get_charset_limits (Lisp_Object charset, int *low, int *high);
|
|
867
|
573 int ichar_to_unicode (Ichar chr);
|
|
788
|
574
|
|
771
|
575 #endif /* MULE */
|
|
|
576
|
|
|
577 #endif /* INCLUDED_charset_h_ */
|
