360 lines
12 KiB
C
360 lines
12 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_BIDI_HEADER
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#define GRUB_BIDI_HEADER 1
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#include <grub/types.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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struct grub_unicode_bidi_pair
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{
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grub_uint32_t key;
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grub_uint32_t replace;
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};
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struct grub_unicode_compact_range
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{
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unsigned start:21;
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unsigned len:9;
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unsigned bidi_type:5;
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unsigned comb_type:8;
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unsigned bidi_mirror:1;
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unsigned join_type:3;
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} GRUB_PACKED;
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/* Old-style Arabic shaping. Used for "visual UTF-8" and
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in grub-mkfont to find variant glyphs in absence of GPOS tables. */
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struct grub_unicode_arabic_shape
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{
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grub_uint32_t code;
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grub_uint32_t isolated;
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grub_uint32_t right_linked;
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grub_uint32_t both_linked;
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grub_uint32_t left_linked;
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};
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extern struct grub_unicode_arabic_shape grub_unicode_arabic_shapes[];
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enum grub_bidi_type
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{
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GRUB_BIDI_TYPE_L = 0,
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GRUB_BIDI_TYPE_LRE,
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GRUB_BIDI_TYPE_LRO,
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GRUB_BIDI_TYPE_R,
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GRUB_BIDI_TYPE_AL,
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GRUB_BIDI_TYPE_RLE,
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GRUB_BIDI_TYPE_RLO,
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GRUB_BIDI_TYPE_PDF,
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GRUB_BIDI_TYPE_EN,
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GRUB_BIDI_TYPE_ES,
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GRUB_BIDI_TYPE_ET,
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GRUB_BIDI_TYPE_AN,
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GRUB_BIDI_TYPE_CS,
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GRUB_BIDI_TYPE_NSM,
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GRUB_BIDI_TYPE_BN,
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GRUB_BIDI_TYPE_B,
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GRUB_BIDI_TYPE_S,
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GRUB_BIDI_TYPE_WS,
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GRUB_BIDI_TYPE_ON
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};
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enum grub_join_type
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{
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GRUB_JOIN_TYPE_NONJOINING = 0,
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GRUB_JOIN_TYPE_LEFT = 1,
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GRUB_JOIN_TYPE_RIGHT = 2,
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GRUB_JOIN_TYPE_DUAL = 3,
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GRUB_JOIN_TYPE_CAUSING = 4,
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GRUB_JOIN_TYPE_TRANSPARENT = 5
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};
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enum grub_comb_type
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{
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GRUB_UNICODE_COMB_NONE = 0,
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GRUB_UNICODE_COMB_OVERLAY = 1,
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GRUB_UNICODE_COMB_HEBREW_SHEVA = 10,
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GRUB_UNICODE_COMB_HEBREW_HATAF_SEGOL = 11,
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GRUB_UNICODE_COMB_HEBREW_HATAF_PATAH = 12,
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GRUB_UNICODE_COMB_HEBREW_HATAF_QAMATS = 13,
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GRUB_UNICODE_COMB_HEBREW_HIRIQ = 14,
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GRUB_UNICODE_COMB_HEBREW_TSERE = 15,
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GRUB_UNICODE_COMB_HEBREW_SEGOL = 16,
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GRUB_UNICODE_COMB_HEBREW_PATAH = 17,
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GRUB_UNICODE_COMB_HEBREW_QAMATS = 18,
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GRUB_UNICODE_COMB_HEBREW_HOLAM = 19,
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GRUB_UNICODE_COMB_HEBREW_QUBUTS = 20,
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GRUB_UNICODE_COMB_HEBREW_DAGESH = 21,
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GRUB_UNICODE_COMB_HEBREW_METEG = 22,
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GRUB_UNICODE_COMB_HEBREW_RAFE = 23,
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GRUB_UNICODE_COMB_HEBREW_SHIN_DOT = 24,
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GRUB_UNICODE_COMB_HEBREW_SIN_DOT = 25,
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GRUB_UNICODE_COMB_HEBREW_VARIKA = 26,
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GRUB_UNICODE_COMB_ARABIC_FATHATAN = 27,
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GRUB_UNICODE_COMB_ARABIC_DAMMATAN = 28,
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GRUB_UNICODE_COMB_ARABIC_KASRATAN = 29,
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GRUB_UNICODE_COMB_ARABIC_FATHAH = 30,
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GRUB_UNICODE_COMB_ARABIC_DAMMAH = 31,
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GRUB_UNICODE_COMB_ARABIC_KASRA = 32,
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GRUB_UNICODE_COMB_ARABIC_SHADDA = 33,
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GRUB_UNICODE_COMB_ARABIC_SUKUN = 34,
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GRUB_UNICODE_COMB_ARABIC_SUPERSCRIPT_ALIF = 35,
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GRUB_UNICODE_COMB_SYRIAC_SUPERSCRIPT_ALAPH = 36,
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GRUB_UNICODE_STACK_ATTACHED_BELOW = 202,
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GRUB_UNICODE_STACK_ATTACHED_ABOVE = 214,
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GRUB_UNICODE_COMB_ATTACHED_ABOVE_RIGHT = 216,
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GRUB_UNICODE_STACK_BELOW = 220,
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GRUB_UNICODE_COMB_BELOW_RIGHT = 222,
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GRUB_UNICODE_COMB_ABOVE_LEFT = 228,
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GRUB_UNICODE_STACK_ABOVE = 230,
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GRUB_UNICODE_COMB_ABOVE_RIGHT = 232,
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GRUB_UNICODE_COMB_YPOGEGRAMMENI = 240,
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/* If combining nature is indicated only by class and
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not "combining type". */
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GRUB_UNICODE_COMB_ME = 253,
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GRUB_UNICODE_COMB_MC = 254,
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GRUB_UNICODE_COMB_MN = 255,
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};
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struct grub_unicode_combining
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{
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grub_uint32_t code:21;
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enum grub_comb_type type:8;
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};
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/* This structure describes a glyph as opposed to character. */
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struct grub_unicode_glyph
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{
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grub_uint32_t base:23; /* minimum: 21 */
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grub_uint16_t variant:9; /* minimum: 9 */
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grub_uint8_t attributes:5; /* minimum: 5 */
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grub_uint8_t bidi_level:6; /* minimum: 6 */
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enum grub_bidi_type bidi_type:5; /* minimum: :5 */
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unsigned ncomb:8;
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/* Hint by unicode subsystem how wide this character usually is.
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Real width is determined by font. Set only in UTF-8 stream. */
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int estimated_width:8;
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grub_size_t orig_pos;
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union
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{
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struct grub_unicode_combining combining_inline[sizeof (void *)
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/ sizeof (struct grub_unicode_combining)];
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struct grub_unicode_combining *combining_ptr;
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};
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};
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#define GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR 0x1
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#define GRUB_UNICODE_GLYPH_ATTRIBUTES_JOIN_LEFT_TO_RIGHT_SHIFT 1
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#define GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED 0x2
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#define GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED \
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(GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED \
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<< GRUB_UNICODE_GLYPH_ATTRIBUTES_JOIN_LEFT_TO_RIGHT_SHIFT)
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/* Set iff the corresponding joining flags come from ZWJ or ZWNJ. */
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#define GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED_EXPLICIT 0x8
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#define GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED_EXPLICIT \
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(GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED_EXPLICIT \
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<< GRUB_UNICODE_GLYPH_ATTRIBUTES_JOIN_LEFT_TO_RIGHT_SHIFT)
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#define GRUB_UNICODE_GLYPH_ATTRIBUTES_JOIN \
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(GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED \
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| GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED \
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| GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED_EXPLICIT \
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| GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED_EXPLICIT)
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enum
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{
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GRUB_UNICODE_DOTLESS_LOWERCASE_I = 0x0131,
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GRUB_UNICODE_DOTLESS_LOWERCASE_J = 0x0237,
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GRUB_UNICODE_COMBINING_GRAPHEME_JOINER = 0x034f,
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GRUB_UNICODE_HEBREW_WAW = 0x05d5,
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GRUB_UNICODE_ARABIC_START = 0x0600,
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GRUB_UNICODE_ARABIC_END = 0x0700,
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GRUB_UNICODE_THAANA_ABAFILI = 0x07a6,
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GRUB_UNICODE_THAANA_AABAAFILI = 0x07a7,
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GRUB_UNICODE_THAANA_IBIFILI = 0x07a8,
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GRUB_UNICODE_THAANA_EEBEEFILI = 0x07a9,
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GRUB_UNICODE_THAANA_UBUFILI = 0x07aa,
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GRUB_UNICODE_THAANA_OOBOOFILI = 0x07ab,
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GRUB_UNICODE_THAANA_EBEFILI = 0x07ac,
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GRUB_UNICODE_THAANA_EYBEYFILI = 0x07ad,
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GRUB_UNICODE_THAANA_OBOFILI = 0x07ae,
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GRUB_UNICODE_THAANA_OABOAFILI = 0x07af,
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GRUB_UNICODE_THAANA_SUKUN = 0x07b0,
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GRUB_UNICODE_ZWNJ = 0x200c,
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GRUB_UNICODE_ZWJ = 0x200d,
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GRUB_UNICODE_LRM = 0x200e,
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GRUB_UNICODE_RLM = 0x200f,
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GRUB_UNICODE_LRE = 0x202a,
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GRUB_UNICODE_RLE = 0x202b,
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GRUB_UNICODE_PDF = 0x202c,
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GRUB_UNICODE_LRO = 0x202d,
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GRUB_UNICODE_RLO = 0x202e,
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GRUB_UNICODE_LEFTARROW = 0x2190,
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GRUB_UNICODE_UPARROW = 0x2191,
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GRUB_UNICODE_RIGHTARROW = 0x2192,
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GRUB_UNICODE_DOWNARROW = 0x2193,
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GRUB_UNICODE_UPDOWNARROW = 0x2195,
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GRUB_UNICODE_LIGHT_HLINE = 0x2500,
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GRUB_UNICODE_HLINE = 0x2501,
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GRUB_UNICODE_LIGHT_VLINE = 0x2502,
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GRUB_UNICODE_VLINE = 0x2503,
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GRUB_UNICODE_LIGHT_CORNER_UL = 0x250c,
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GRUB_UNICODE_CORNER_UL = 0x250f,
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GRUB_UNICODE_LIGHT_CORNER_UR = 0x2510,
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GRUB_UNICODE_CORNER_UR = 0x2513,
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GRUB_UNICODE_LIGHT_CORNER_LL = 0x2514,
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GRUB_UNICODE_CORNER_LL = 0x2517,
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GRUB_UNICODE_LIGHT_CORNER_LR = 0x2518,
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GRUB_UNICODE_CORNER_LR = 0x251b,
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GRUB_UNICODE_BLACK_UP_TRIANGLE = 0x25b2,
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GRUB_UNICODE_BLACK_RIGHT_TRIANGLE = 0x25ba,
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GRUB_UNICODE_BLACK_DOWN_TRIANGLE = 0x25bc,
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GRUB_UNICODE_BLACK_LEFT_TRIANGLE = 0x25c4,
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GRUB_UNICODE_VARIATION_SELECTOR_1 = 0xfe00,
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GRUB_UNICODE_VARIATION_SELECTOR_16 = 0xfe0f,
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GRUB_UNICODE_TAG_START = 0xe0000,
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GRUB_UNICODE_TAG_END = 0xe007f,
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GRUB_UNICODE_VARIATION_SELECTOR_17 = 0xe0100,
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GRUB_UNICODE_VARIATION_SELECTOR_256 = 0xe01ef,
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GRUB_UNICODE_LAST_VALID = 0x10ffff
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};
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extern struct grub_unicode_compact_range grub_unicode_compact[];
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extern struct grub_unicode_bidi_pair grub_unicode_bidi_pairs[];
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#define GRUB_UNICODE_MAX_CACHED_CHAR 0x20000
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/* Unicode mandates an arbitrary limit. */
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#define GRUB_BIDI_MAX_EXPLICIT_LEVEL 61
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struct grub_term_pos
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{
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unsigned valid:1;
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unsigned x:15, y:16;
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};
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grub_ssize_t
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grub_bidi_logical_to_visual (const grub_uint32_t *logical,
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grub_size_t logical_len,
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struct grub_unicode_glyph **visual_out,
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grub_size_t (*getcharwidth) (const struct grub_unicode_glyph *visual, void *getcharwidth_arg),
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void *getcharwidth_arg,
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grub_size_t max_width,
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grub_size_t start_width, grub_uint32_t codechar,
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struct grub_term_pos *pos,
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int primitive_wrap);
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enum grub_comb_type
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grub_unicode_get_comb_type (grub_uint32_t c);
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grub_size_t
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grub_unicode_aglomerate_comb (const grub_uint32_t *in, grub_size_t inlen,
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struct grub_unicode_glyph *out);
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static inline const struct grub_unicode_combining *
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grub_unicode_get_comb (const struct grub_unicode_glyph *in)
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{
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if (in->ncomb == 0)
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return NULL;
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if (in->ncomb > ARRAY_SIZE (in->combining_inline))
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return in->combining_ptr;
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return in->combining_inline;
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}
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static inline void
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grub_unicode_destroy_glyph (struct grub_unicode_glyph *glyph)
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{
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if (glyph->ncomb > ARRAY_SIZE (glyph->combining_inline))
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grub_free (glyph->combining_ptr);
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glyph->ncomb = 0;
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}
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static inline struct grub_unicode_glyph *
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grub_unicode_glyph_dup (const struct grub_unicode_glyph *in)
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{
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struct grub_unicode_glyph *out = grub_malloc (sizeof (*out));
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if (!out)
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return NULL;
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grub_memcpy (out, in, sizeof (*in));
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if (in->ncomb > ARRAY_SIZE (out->combining_inline))
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{
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out->combining_ptr = grub_malloc (in->ncomb * sizeof (out->combining_ptr[0]));
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if (!out->combining_ptr)
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{
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grub_free (out);
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return NULL;
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}
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grub_memcpy (out->combining_ptr, in->combining_ptr,
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in->ncomb * sizeof (out->combining_ptr[0]));
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}
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else
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grub_memcpy (&out->combining_inline, &in->combining_inline,
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sizeof (out->combining_inline));
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return out;
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}
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static inline void
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grub_unicode_set_glyph (struct grub_unicode_glyph *out,
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const struct grub_unicode_glyph *in)
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{
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grub_memcpy (out, in, sizeof (*in));
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if (in->ncomb > ARRAY_SIZE (out->combining_inline))
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{
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out->combining_ptr = grub_malloc (in->ncomb * sizeof (out->combining_ptr[0]));
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if (!out->combining_ptr)
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return;
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grub_memcpy (out->combining_ptr, in->combining_ptr,
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in->ncomb * sizeof (out->combining_ptr[0]));
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}
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else
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grub_memcpy (&out->combining_inline, &in->combining_inline,
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sizeof (out->combining_inline));
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}
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static inline struct grub_unicode_glyph *
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grub_unicode_glyph_from_code (grub_uint32_t code)
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{
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struct grub_unicode_glyph *ret;
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ret = grub_zalloc (sizeof (*ret));
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if (!ret)
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return NULL;
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ret->base = code;
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return ret;
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}
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static inline void
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grub_unicode_set_glyph_from_code (struct grub_unicode_glyph *glyph,
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grub_uint32_t code)
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{
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grub_memset (glyph, 0, sizeof (*glyph));
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glyph->base = code;
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}
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grub_uint32_t
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grub_unicode_mirror_code (grub_uint32_t in);
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grub_uint32_t
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grub_unicode_shape_code (grub_uint32_t in, grub_uint8_t attr);
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const grub_uint32_t *
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grub_unicode_get_comb_end (const grub_uint32_t *end,
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const grub_uint32_t *cur);
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#endif
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