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/*
* 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)
{
if (_hb_ucd_compose_hangul (a, b, ab)) return true;
hb_codepoint_t u = 0;
if ((a & 0xFFFFF800u) == 0x0000u && (b & 0xFFFFFF80) == 0x0300u)
{
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
{
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 (likely (!i)) return false;
i--;
if (i < ARRAY_LENGTH (_hb_ucd_dm1_p0_map) + ARRAY_LENGTH (_hb_ucd_dm1_p2_map))
{
if (i < ARRAY_LENGTH (_hb_ucd_dm1_p0_map))
*a = _hb_ucd_dm1_p0_map[i];
else
{
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);
if (i < ARRAY_LENGTH (_hb_ucd_dm2_u32_map))
{
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);
uint64_t v = _hb_ucd_dm2_u64_map[i];
*a = HB_CODEPOINT_DECODE3_1 (v);
*b = HB_CODEPOINT_DECODE3_2 (v);
return true;
}
#if HB_USE_ATEXIT
static void free_static_ucd_funcs ();
#endif
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);
#if HB_USE_ATEXIT
atexit (free_static_ucd_funcs);
#endif
return funcs;
}
} static_ucd_funcs;
#if HB_USE_ATEXIT
static
void free_static_ucd_funcs ()
{
static_ucd_funcs.free_instance ();
}
#endif
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 ();
}
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