Edit
kc3-lang/harfbuzz/src/hb-ucd.cc
Behdad Esfahbod
- src/hb-ucd.cc
-
/* * Copyright (C) 2012 Grigori Goronzy <greg@kinoho.net> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "hb.hh" #include "hb-unicode.hh" #include "hb-machinery.hh" #include "hb-ucd-table.hh" static hb_unicode_combining_class_t hb_ucd_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t unicode, void *user_data HB_UNUSED) { return (hb_unicode_combining_class_t) _hb_ucd_ccc (unicode); } static hb_unicode_general_category_t hb_ucd_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t unicode, void *user_data HB_UNUSED) { return (hb_unicode_general_category_t) _hb_ucd_gc (unicode); } static hb_codepoint_t hb_ucd_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t unicode, void *user_data HB_UNUSED) { return unicode + _hb_ucd_bmg (unicode); } static hb_script_t hb_ucd_script (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t unicode, void *user_data HB_UNUSED) { return _hb_ucd_sc_map[_hb_ucd_sc (unicode)]; } #define SBASE 0xAC00u #define LBASE 0x1100u #define VBASE 0x1161u #define TBASE 0x11A7u #define SCOUNT 11172u #define LCOUNT 19u #define VCOUNT 21u #define TCOUNT 28u #define NCOUNT (VCOUNT * TCOUNT) static inline bool _hb_ucd_decompose_hangul (hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b) { unsigned si = ab - SBASE; if (si >= SCOUNT) return false; if (si % TCOUNT) { /* LV,T */ *a = SBASE + (si / TCOUNT) * TCOUNT; *b = TBASE + (si % TCOUNT); return true; } else { /* L,V */ *a = LBASE + (si / NCOUNT); *b = VBASE + (si % NCOUNT) / TCOUNT; return true; } } static inline bool _hb_ucd_compose_hangul (hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab) { if (a >= SBASE && a < (SBASE + SCOUNT) && b > TBASE && b < (TBASE + TCOUNT) && !((a - SBASE) % TCOUNT)) { /* LV,T */ *ab = a + (b - TBASE); return true; } else if (a >= LBASE && a < (LBASE + LCOUNT) && b >= VBASE && b < (VBASE + VCOUNT)) { /* L,V */ int li = a - LBASE; int vi = b - VBASE; *ab = SBASE + li * NCOUNT + vi * TCOUNT; return true; } else return false; } static int _cmp_pair (const void *_key, const void *_item) { uint64_t& a = * (uint64_t*) _key; uint64_t b = (* (uint64_t*) _item) & HB_CODEPOINT_ENCODE3(0x1FFFFFu, 0x1FFFFFu, 0); return a < b ? -1 : a > b ? +1 : 0; } static int _cmp_pair_11_7_14 (const void *_key, const void *_item) { uint32_t& a = * (uint32_t*) _key; uint32_t b = (* (uint32_t*) _item) & HB_CODEPOINT_ENCODE3_11_7_14(0x1FFFFFu, 0x1FFFFFu, 0); return a < b ? -1 : a > b ? +1 : 0; } static hb_bool_t hb_ucd_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab, void *user_data HB_UNUSED) { // Hangul is handled algorithmically. if (_hb_ucd_compose_hangul (a, b, ab)) return true; hb_codepoint_t u = 0; if ((a & 0xFFFFF800u) == 0x0000u && (b & 0xFFFFFF80) == 0x0300u) { /* If "a" is small enough and "b" is in the U+0300 range, * the composition data is encoded in a 32bit array sorted * by "a,b" pair. */ uint32_t k = HB_CODEPOINT_ENCODE3_11_7_14 (a, b, 0); const uint32_t *v = hb_bsearch (k, _hb_ucd_dm2_u32_map, ARRAY_LENGTH (_hb_ucd_dm2_u32_map), sizeof (*_hb_ucd_dm2_u32_map), _cmp_pair_11_7_14); if (likely (!v)) return false; u = HB_CODEPOINT_DECODE3_11_7_14_3 (*v); } else { /* Otherwise it is stored in a 64bit array sorted by * "a,b" pair. */ uint64_t k = HB_CODEPOINT_ENCODE3 (a, b, 0); const uint64_t *v = hb_bsearch (k, _hb_ucd_dm2_u64_map, ARRAY_LENGTH (_hb_ucd_dm2_u64_map), sizeof (*_hb_ucd_dm2_u64_map), _cmp_pair); if (likely (!v)) return false; u = HB_CODEPOINT_DECODE3_3 (*v); } if (unlikely (!u)) return false; *ab = u; return true; } static hb_bool_t hb_ucd_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b, void *user_data HB_UNUSED) { if (_hb_ucd_decompose_hangul (ab, a, b)) return true; unsigned i = _hb_ucd_dm (ab); /* If no data, there's no decomposition. */ if (likely (!i)) return false; i--; /* Check if it's a single-character decomposition. */ if (i < ARRAY_LENGTH (_hb_ucd_dm1_p0_map) + ARRAY_LENGTH (_hb_ucd_dm1_p2_map)) { /* Single-character decompositions currently are only in plane 0 or plane 2. */ if (i < ARRAY_LENGTH (_hb_ucd_dm1_p0_map)) { /* Plane 0. */ *a = _hb_ucd_dm1_p0_map[i]; } else { /* Plane 2. */ i -= ARRAY_LENGTH (_hb_ucd_dm1_p0_map); *a = 0x20000 | _hb_ucd_dm1_p2_map[i]; } *b = 0; return true; } i -= ARRAY_LENGTH (_hb_ucd_dm1_p0_map) + ARRAY_LENGTH (_hb_ucd_dm1_p2_map); /* Otherwise they are encoded either in a 32bit array or a 64bit array. */ if (i < ARRAY_LENGTH (_hb_ucd_dm2_u32_map)) { /* 32bit array. */ uint32_t v = _hb_ucd_dm2_u32_map[i]; *a = HB_CODEPOINT_DECODE3_11_7_14_1 (v); *b = HB_CODEPOINT_DECODE3_11_7_14_2 (v); return true; } i -= ARRAY_LENGTH (_hb_ucd_dm2_u32_map); /* 64bit array. */ uint64_t v = _hb_ucd_dm2_u64_map[i]; *a = HB_CODEPOINT_DECODE3_1 (v); *b = HB_CODEPOINT_DECODE3_2 (v); return true; } static void free_static_ucd_funcs (); static struct hb_ucd_unicode_funcs_lazy_loader_t : hb_unicode_funcs_lazy_loader_t<hb_ucd_unicode_funcs_lazy_loader_t> { static hb_unicode_funcs_t *create () { hb_unicode_funcs_t *funcs = hb_unicode_funcs_create (nullptr); hb_unicode_funcs_set_combining_class_func (funcs, hb_ucd_combining_class, nullptr, nullptr); hb_unicode_funcs_set_general_category_func (funcs, hb_ucd_general_category, nullptr, nullptr); hb_unicode_funcs_set_mirroring_func (funcs, hb_ucd_mirroring, nullptr, nullptr); hb_unicode_funcs_set_script_func (funcs, hb_ucd_script, nullptr, nullptr); hb_unicode_funcs_set_compose_func (funcs, hb_ucd_compose, nullptr, nullptr); hb_unicode_funcs_set_decompose_func (funcs, hb_ucd_decompose, nullptr, nullptr); hb_unicode_funcs_make_immutable (funcs); hb_atexit (free_static_ucd_funcs); return funcs; } } static_ucd_funcs; static inline void free_static_ucd_funcs () { static_ucd_funcs.free_instance (); } hb_unicode_funcs_t * hb_ucd_get_unicode_funcs () { #ifdef HB_NO_UCD return hb_unicode_funcs_get_empty (); #endif return static_ucd_funcs.get_unconst (); }