author | prr |
Fri, 01 Mar 2019 16:59:19 -0800 | |
changeset 54232 | 7c11a7cc7c1d |
parent 50826 | src/java.desktop/share/native/libfontmanager/harfbuzz/hb-unicode-private.hh@f5b95be8b6e2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright © 2009 Red Hat, Inc. |
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* Copyright © 2011 Codethink Limited |
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* Copyright © 2010,2011,2012 Google, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Red Hat Author(s): Behdad Esfahbod |
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* Codethink Author(s): Ryan Lortie |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#ifndef HB_UNICODE_HH |
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#define HB_UNICODE_HH |
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#include "hb.hh" |
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extern HB_INTERNAL const uint8_t _hb_modified_combining_class[256]; |
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/* |
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* hb_unicode_funcs_t |
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*/ |
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#define HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS \ |
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HB_UNICODE_FUNC_IMPLEMENT (combining_class) \ |
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HB_UNICODE_FUNC_IMPLEMENT (eastasian_width) \ |
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HB_UNICODE_FUNC_IMPLEMENT (general_category) \ |
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HB_UNICODE_FUNC_IMPLEMENT (mirroring) \ |
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HB_UNICODE_FUNC_IMPLEMENT (script) \ |
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HB_UNICODE_FUNC_IMPLEMENT (compose) \ |
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HB_UNICODE_FUNC_IMPLEMENT (decompose) \ |
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HB_UNICODE_FUNC_IMPLEMENT (decompose_compatibility) \ |
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/* ^--- Add new callbacks here */ |
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/* Simple callbacks are those taking a hb_codepoint_t and returning a hb_codepoint_t */ |
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#define HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE \ |
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HB_UNICODE_FUNC_IMPLEMENT (hb_unicode_combining_class_t, combining_class) \ |
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HB_UNICODE_FUNC_IMPLEMENT (unsigned int, eastasian_width) \ |
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HB_UNICODE_FUNC_IMPLEMENT (hb_unicode_general_category_t, general_category) \ |
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HB_UNICODE_FUNC_IMPLEMENT (hb_codepoint_t, mirroring) \ |
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HB_UNICODE_FUNC_IMPLEMENT (hb_script_t, script) \ |
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/* ^--- Add new simple callbacks here */ |
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struct hb_unicode_funcs_t |
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{ |
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hb_object_header_t header; |
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hb_unicode_funcs_t *parent; |
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#define HB_UNICODE_FUNC_IMPLEMENT(return_type, name) \ |
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return_type name (hb_codepoint_t unicode) { return func.name (this, unicode, user_data.name); } |
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HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE |
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#undef HB_UNICODE_FUNC_IMPLEMENT |
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hb_bool_t compose (hb_codepoint_t a, hb_codepoint_t b, |
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hb_codepoint_t *ab) |
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{ |
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*ab = 0; |
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if (unlikely (!a || !b)) return false; |
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return func.compose (this, a, b, ab, user_data.compose); |
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} |
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hb_bool_t decompose (hb_codepoint_t ab, |
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hb_codepoint_t *a, hb_codepoint_t *b) |
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{ |
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*a = ab; *b = 0; |
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return func.decompose (this, ab, a, b, user_data.decompose); |
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} |
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unsigned int decompose_compatibility (hb_codepoint_t u, |
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hb_codepoint_t *decomposed) |
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{ |
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unsigned int ret = func.decompose_compatibility (this, u, decomposed, user_data.decompose_compatibility); |
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if (ret == 1 && u == decomposed[0]) { |
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decomposed[0] = 0; |
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return 0; |
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} |
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decomposed[ret] = 0; |
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return ret; |
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} |
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unsigned int |
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modified_combining_class (hb_codepoint_t u) |
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{ |
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/* XXX This hack belongs to the Myanmar shaper. */ |
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if (unlikely (u == 0x1037u)) u = 0x103Au; |
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/* XXX This hack belongs to the USE shaper (for Tai Tham): |
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* Reorder SAKOT to ensure it comes after any tone marks. */ |
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if (unlikely (u == 0x1A60u)) return 254; |
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/* XXX This hack belongs to the Tibetan shaper: |
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* Reorder PADMA to ensure it comes after any vowel marks. */ |
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if (unlikely (u == 0x0FC6u)) return 254; |
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/* Reorder TSA -PHRU to reorder before U+0F74 */ |
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if (unlikely (u == 0x0F39u)) return 127; |
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return _hb_modified_combining_class[combining_class (u)]; |
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} |
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static hb_bool_t |
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is_variation_selector (hb_codepoint_t unicode) |
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{ |
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/* U+180B..180D MONGOLIAN FREE VARIATION SELECTORs are handled in the |
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* Arabic shaper. No need to match them here. */ |
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return unlikely (hb_in_ranges<hb_codepoint_t> (unicode, |
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0xFE00u, 0xFE0Fu, /* VARIATION SELECTOR-1..16 */ |
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0xE0100u, 0xE01EFu)); /* VARIATION SELECTOR-17..256 */ |
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} |
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/* Default_Ignorable codepoints: |
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* |
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* Note: While U+115F, U+1160, U+3164 and U+FFA0 are Default_Ignorable, |
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* we do NOT want to hide them, as the way Uniscribe has implemented them |
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* is with regular spacing glyphs, and that's the way fonts are made to work. |
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* As such, we make exceptions for those four. |
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* Also ignoring U+1BCA0..1BCA3. https://github.com/harfbuzz/harfbuzz/issues/503 |
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* |
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138 |
* Unicode 7.0: |
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* $ grep '; Default_Ignorable_Code_Point ' DerivedCoreProperties.txt | sed 's/;.*#/#/' |
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* 00AD # Cf SOFT HYPHEN |
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141 |
* 034F # Mn COMBINING GRAPHEME JOINER |
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142 |
* 061C # Cf ARABIC LETTER MARK |
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143 |
* 115F..1160 # Lo [2] HANGUL CHOSEONG FILLER..HANGUL JUNGSEONG FILLER |
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* 17B4..17B5 # Mn [2] KHMER VOWEL INHERENT AQ..KHMER VOWEL INHERENT AA |
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* 180B..180D # Mn [3] MONGOLIAN FREE VARIATION SELECTOR ONE..MONGOLIAN FREE VARIATION SELECTOR THREE |
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* 180E # Cf MONGOLIAN VOWEL SEPARATOR |
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147 |
* 200B..200F # Cf [5] ZERO WIDTH SPACE..RIGHT-TO-LEFT MARK |
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148 |
* 202A..202E # Cf [5] LEFT-TO-RIGHT EMBEDDING..RIGHT-TO-LEFT OVERRIDE |
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149 |
* 2060..2064 # Cf [5] WORD JOINER..INVISIBLE PLUS |
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150 |
* 2065 # Cn <reserved-2065> |
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151 |
* 2066..206F # Cf [10] LEFT-TO-RIGHT ISOLATE..NOMINAL DIGIT SHAPES |
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152 |
* 3164 # Lo HANGUL FILLER |
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153 |
* FE00..FE0F # Mn [16] VARIATION SELECTOR-1..VARIATION SELECTOR-16 |
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154 |
* FEFF # Cf ZERO WIDTH NO-BREAK SPACE |
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155 |
* FFA0 # Lo HALFWIDTH HANGUL FILLER |
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156 |
* FFF0..FFF8 # Cn [9] <reserved-FFF0>..<reserved-FFF8> |
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157 |
* 1BCA0..1BCA3 # Cf [4] SHORTHAND FORMAT LETTER OVERLAP..SHORTHAND FORMAT UP STEP |
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158 |
* 1D173..1D17A # Cf [8] MUSICAL SYMBOL BEGIN BEAM..MUSICAL SYMBOL END PHRASE |
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159 |
* E0000 # Cn <reserved-E0000> |
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160 |
* E0001 # Cf LANGUAGE TAG |
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161 |
* E0002..E001F # Cn [30] <reserved-E0002>..<reserved-E001F> |
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162 |
* E0020..E007F # Cf [96] TAG SPACE..CANCEL TAG |
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163 |
* E0080..E00FF # Cn [128] <reserved-E0080>..<reserved-E00FF> |
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164 |
* E0100..E01EF # Mn [240] VARIATION SELECTOR-17..VARIATION SELECTOR-256 |
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165 |
* E01F0..E0FFF # Cn [3600] <reserved-E01F0>..<reserved-E0FFF> |
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166 |
*/ |
54232 | 167 |
static hb_bool_t |
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is_default_ignorable (hb_codepoint_t ch) |
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169 |
{ |
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hb_codepoint_t plane = ch >> 16; |
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171 |
if (likely (plane == 0)) |
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172 |
{ |
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173 |
/* BMP */ |
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174 |
hb_codepoint_t page = ch >> 8; |
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175 |
switch (page) { |
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176 |
case 0x00: return unlikely (ch == 0x00ADu); |
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case 0x03: return unlikely (ch == 0x034Fu); |
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178 |
case 0x06: return unlikely (ch == 0x061Cu); |
48274 | 179 |
case 0x17: return hb_in_range<hb_codepoint_t> (ch, 0x17B4u, 0x17B5u); |
180 |
case 0x18: return hb_in_range<hb_codepoint_t> (ch, 0x180Bu, 0x180Eu); |
|
181 |
case 0x20: return hb_in_ranges<hb_codepoint_t> (ch, 0x200Bu, 0x200Fu, |
|
40435 | 182 |
0x202Au, 0x202Eu, |
183 |
0x2060u, 0x206Fu); |
|
48274 | 184 |
case 0xFE: return hb_in_range<hb_codepoint_t> (ch, 0xFE00u, 0xFE0Fu) || ch == 0xFEFFu; |
185 |
case 0xFF: return hb_in_range<hb_codepoint_t> (ch, 0xFFF0u, 0xFFF8u); |
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186 |
default: return false; |
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187 |
} |
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188 |
} |
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189 |
else |
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190 |
{ |
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191 |
/* Other planes */ |
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192 |
switch (plane) { |
48274 | 193 |
case 0x01: return hb_in_range<hb_codepoint_t> (ch, 0x1D173u, 0x1D17Au); |
194 |
case 0x0E: return hb_in_range<hb_codepoint_t> (ch, 0xE0000u, 0xE0FFFu); |
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195 |
default: return false; |
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196 |
} |
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197 |
} |
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198 |
} |
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199 |
|
40435 | 200 |
/* Space estimates based on: |
50826 | 201 |
* https://unicode.org/charts/PDF/U2000.pdf |
202 |
* https://docs.microsoft.com/en-us/typography/develop/character-design-standards/whitespace |
|
40435 | 203 |
*/ |
204 |
enum space_t { |
|
205 |
NOT_SPACE = 0, |
|
206 |
SPACE_EM = 1, |
|
207 |
SPACE_EM_2 = 2, |
|
208 |
SPACE_EM_3 = 3, |
|
209 |
SPACE_EM_4 = 4, |
|
210 |
SPACE_EM_5 = 5, |
|
211 |
SPACE_EM_6 = 6, |
|
212 |
SPACE_EM_16 = 16, |
|
213 |
SPACE_4_EM_18, /* 4/18th of an EM! */ |
|
214 |
SPACE, |
|
215 |
SPACE_FIGURE, |
|
216 |
SPACE_PUNCTUATION, |
|
217 |
SPACE_NARROW, |
|
218 |
}; |
|
54232 | 219 |
static space_t |
40435 | 220 |
space_fallback_type (hb_codepoint_t u) |
221 |
{ |
|
222 |
switch (u) |
|
223 |
{ |
|
224 |
/* All GC=Zs chars that can use a fallback. */ |
|
225 |
default: return NOT_SPACE; /* U+1680 OGHAM SPACE MARK */ |
|
226 |
case 0x0020u: return SPACE; /* U+0020 SPACE */ |
|
227 |
case 0x00A0u: return SPACE; /* U+00A0 NO-BREAK SPACE */ |
|
228 |
case 0x2000u: return SPACE_EM_2; /* U+2000 EN QUAD */ |
|
229 |
case 0x2001u: return SPACE_EM; /* U+2001 EM QUAD */ |
|
230 |
case 0x2002u: return SPACE_EM_2; /* U+2002 EN SPACE */ |
|
231 |
case 0x2003u: return SPACE_EM; /* U+2003 EM SPACE */ |
|
232 |
case 0x2004u: return SPACE_EM_3; /* U+2004 THREE-PER-EM SPACE */ |
|
233 |
case 0x2005u: return SPACE_EM_4; /* U+2005 FOUR-PER-EM SPACE */ |
|
234 |
case 0x2006u: return SPACE_EM_6; /* U+2006 SIX-PER-EM SPACE */ |
|
235 |
case 0x2007u: return SPACE_FIGURE; /* U+2007 FIGURE SPACE */ |
|
236 |
case 0x2008u: return SPACE_PUNCTUATION; /* U+2008 PUNCTUATION SPACE */ |
|
237 |
case 0x2009u: return SPACE_EM_5; /* U+2009 THIN SPACE */ |
|
238 |
case 0x200Au: return SPACE_EM_16; /* U+200A HAIR SPACE */ |
|
239 |
case 0x202Fu: return SPACE_NARROW; /* U+202F NARROW NO-BREAK SPACE */ |
|
240 |
case 0x205Fu: return SPACE_4_EM_18; /* U+205F MEDIUM MATHEMATICAL SPACE */ |
|
241 |
case 0x3000u: return SPACE_EM; /* U+3000 IDEOGRAPHIC SPACE */ |
|
242 |
} |
|
243 |
} |
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|
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245 |
struct { |
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246 |
#define HB_UNICODE_FUNC_IMPLEMENT(name) hb_unicode_##name##_func_t name; |
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247 |
HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS |
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248 |
#undef HB_UNICODE_FUNC_IMPLEMENT |
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249 |
} func; |
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250 |
|
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251 |
struct { |
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252 |
#define HB_UNICODE_FUNC_IMPLEMENT(name) void *name; |
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253 |
HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS |
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254 |
#undef HB_UNICODE_FUNC_IMPLEMENT |
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255 |
} user_data; |
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256 |
|
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257 |
struct { |
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258 |
#define HB_UNICODE_FUNC_IMPLEMENT(name) hb_destroy_func_t name; |
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259 |
HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS |
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260 |
#undef HB_UNICODE_FUNC_IMPLEMENT |
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261 |
} destroy; |
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262 |
}; |
54232 | 263 |
DECLARE_NULL_INSTANCE (hb_unicode_funcs_t); |
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264 |
|
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265 |
|
54232 | 266 |
/* |
267 |
* Modified combining marks |
|
268 |
*/ |
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269 |
|
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270 |
/* Hebrew |
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271 |
* |
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272 |
* We permute the "fixed-position" classes 10-26 into the order |
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273 |
* described in the SBL Hebrew manual: |
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274 |
* |
50826 | 275 |
* https://www.sbl-site.org/Fonts/SBLHebrewUserManual1.5x.pdf |
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276 |
* |
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277 |
* (as recommended by: |
50826 | 278 |
* https://forum.fontlab.com/archive-old-microsoft-volt-group/vista-and-diacritic-ordering/msg22823/) |
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279 |
* |
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280 |
* More details here: |
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281 |
* https://bugzilla.mozilla.org/show_bug.cgi?id=662055 |
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282 |
*/ |
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283 |
#define HB_MODIFIED_COMBINING_CLASS_CCC10 22 /* sheva */ |
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284 |
#define HB_MODIFIED_COMBINING_CLASS_CCC11 15 /* hataf segol */ |
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285 |
#define HB_MODIFIED_COMBINING_CLASS_CCC12 16 /* hataf patah */ |
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286 |
#define HB_MODIFIED_COMBINING_CLASS_CCC13 17 /* hataf qamats */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC14 23 /* hiriq */ |
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288 |
#define HB_MODIFIED_COMBINING_CLASS_CCC15 18 /* tsere */ |
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289 |
#define HB_MODIFIED_COMBINING_CLASS_CCC16 19 /* segol */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC17 20 /* patah */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC18 21 /* qamats */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC19 14 /* holam */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC20 24 /* qubuts */ |
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294 |
#define HB_MODIFIED_COMBINING_CLASS_CCC21 12 /* dagesh */ |
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295 |
#define HB_MODIFIED_COMBINING_CLASS_CCC22 25 /* meteg */ |
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296 |
#define HB_MODIFIED_COMBINING_CLASS_CCC23 13 /* rafe */ |
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297 |
#define HB_MODIFIED_COMBINING_CLASS_CCC24 10 /* shin dot */ |
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298 |
#define HB_MODIFIED_COMBINING_CLASS_CCC25 11 /* sin dot */ |
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299 |
#define HB_MODIFIED_COMBINING_CLASS_CCC26 26 /* point varika */ |
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300 |
|
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301 |
/* |
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302 |
* Arabic |
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303 |
* |
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* Modify to move Shadda (ccc=33) before other marks. See: |
50826 | 305 |
* https://unicode.org/faq/normalization.html#8 |
306 |
* https://unicode.org/faq/normalization.html#9 |
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*/ |
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308 |
#define HB_MODIFIED_COMBINING_CLASS_CCC27 28 /* fathatan */ |
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309 |
#define HB_MODIFIED_COMBINING_CLASS_CCC28 29 /* dammatan */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC29 30 /* kasratan */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC30 31 /* fatha */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC31 32 /* damma */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC32 33 /* kasra */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC33 27 /* shadda */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC34 34 /* sukun */ |
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316 |
#define HB_MODIFIED_COMBINING_CLASS_CCC35 35 /* superscript alef */ |
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317 |
|
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318 |
/* Syriac */ |
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319 |
#define HB_MODIFIED_COMBINING_CLASS_CCC36 36 /* superscript alaph */ |
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320 |
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/* Telugu |
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322 |
* |
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* Modify Telugu length marks (ccc=84, ccc=91). |
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* These are the only matras in the main Indic scripts range that have |
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* a non-zero ccc. That makes them reorder with the Halant that is |
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* ccc=9. Just zero them, we don't need them in our Indic shaper. |
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*/ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC84 0 /* length mark */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC91 0 /* ai length mark */ |
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330 |
|
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/* Thai |
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* |
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* Modify U+0E38 and U+0E39 (ccc=103) to be reordered before U+0E3A (ccc=9). |
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* Assign 3, which is unassigned otherwise. |
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* Uniscribe does this reordering too. |
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*/ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC103 3 /* sara u / sara uu */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC107 107 /* mai * */ |
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339 |
|
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/* Lao */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC118 118 /* sign u / sign uu */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC122 122 /* mai * */ |
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|
40435 | 344 |
/* Tibetan |
48274 | 345 |
* |
346 |
* In case of multiple vowel-signs, use u first (but after achung) |
|
347 |
* this allows Dzongkha multi-vowel shortcuts to render correctly |
|
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*/ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC129 129 /* sign aa */ |
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#define HB_MODIFIED_COMBINING_CLASS_CCC130 132 /* sign i */ |
351 |
#define HB_MODIFIED_COMBINING_CLASS_CCC132 131 /* sign u */ |
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352 |
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/* Misc */ |
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#define HB_UNICODE_GENERAL_CATEGORY_IS_MARK(gen_cat) \ |
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(FLAG_UNSAFE (gen_cat) & \ |
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(FLAG (HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK) | \ |
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FLAG (HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) | \ |
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FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK))) |
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|
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|
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/* |
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* Ranges, used for bsearch tables. |
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*/ |
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365 |
||
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struct hb_unicode_range_t |
|
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{ |
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static int |
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cmp (const void *_key, const void *_item) |
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{ |
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hb_codepoint_t cp = *((hb_codepoint_t *) _key); |
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const hb_unicode_range_t *range = (hb_unicode_range_t *) _item; |
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54232 | 374 |
if (cp < range->start) |
375 |
return -1; |
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else if (cp <= range->end) |
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377 |
return 0; |
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else |
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return +1; |
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} |
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381 |
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hb_codepoint_t start; |
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383 |
hb_codepoint_t end; |
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}; |
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/* |
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* Emoji. |
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388 |
*/ |
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389 |
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390 |
HB_INTERNAL bool |
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_hb_unicode_is_emoji_Extended_Pictographic (hb_codepoint_t cp); |
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394 |
#endif /* HB_UNICODE_HH */ |