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-rw-r--r--gfx/harfbuzz/src/hb-ucd.cc258
1 files changed, 258 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ucd.cc b/gfx/harfbuzz/src/hb-ucd.cc
new file mode 100644
index 0000000000..4c8b1ee5e6
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-ucd.cc
@@ -0,0 +1,258 @@
+/*
+ * 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 ();
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 09:48:53 +0000