harfbuzz/src/hb-unicode.c

360 lines
8.1 KiB
C

/*
* Copyright (C) 2009 Red Hat, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Behdad Esfahbod
*/
#include "hb-private.h"
#include "hb-unicode-private.h"
HB_BEGIN_DECLS
/*
* hb_unicode_funcs_t
*/
static hb_codepoint_t hb_unicode_get_mirroring_nil (hb_codepoint_t unicode) { return unicode; }
static hb_category_t hb_unicode_get_general_category_nil (hb_codepoint_t unicode HB_UNUSED) { return HB_CATEGORY_OTHER_LETTER; }
static hb_script_t hb_unicode_get_script_nil (hb_codepoint_t unicode HB_UNUSED) { return HB_SCRIPT_UNKNOWN; }
static unsigned int hb_unicode_get_combining_class_nil (hb_codepoint_t unicode HB_UNUSED) { return 0; }
static unsigned int hb_unicode_get_eastasian_width_nil (hb_codepoint_t unicode HB_UNUSED) { return 1; }
hb_unicode_funcs_t _hb_unicode_funcs_nil = {
HB_REFERENCE_COUNT_INVALID, /* ref_count */
TRUE, /* immutable */
{
hb_unicode_get_general_category_nil,
hb_unicode_get_combining_class_nil,
hb_unicode_get_mirroring_nil,
hb_unicode_get_script_nil,
hb_unicode_get_eastasian_width_nil
}
};
hb_unicode_funcs_t *
hb_unicode_funcs_create (void)
{
hb_unicode_funcs_t *ufuncs;
if (!HB_OBJECT_DO_CREATE (hb_unicode_funcs_t, ufuncs))
return &_hb_unicode_funcs_nil;
ufuncs->v = _hb_unicode_funcs_nil.v;
return ufuncs;
}
hb_unicode_funcs_t *
hb_unicode_funcs_reference (hb_unicode_funcs_t *ufuncs)
{
HB_OBJECT_DO_REFERENCE (ufuncs);
}
unsigned int
hb_unicode_funcs_get_reference_count (hb_unicode_funcs_t *ufuncs)
{
HB_OBJECT_DO_GET_REFERENCE_COUNT (ufuncs);
}
void
hb_unicode_funcs_destroy (hb_unicode_funcs_t *ufuncs)
{
HB_OBJECT_DO_DESTROY (ufuncs);
free (ufuncs);
}
hb_unicode_funcs_t *
hb_unicode_funcs_copy (hb_unicode_funcs_t *other_ufuncs)
{
hb_unicode_funcs_t *ufuncs;
if (!HB_OBJECT_DO_CREATE (hb_unicode_funcs_t, ufuncs))
return &_hb_unicode_funcs_nil;
ufuncs->v = other_ufuncs->v;
return ufuncs;
}
void
hb_unicode_funcs_make_immutable (hb_unicode_funcs_t *ufuncs)
{
if (HB_OBJECT_IS_INERT (ufuncs))
return;
ufuncs->immutable = TRUE;
}
hb_bool_t
hb_unicode_funcs_is_immutable (hb_unicode_funcs_t *ufuncs)
{
return ufuncs->immutable;
}
void
hb_unicode_funcs_set_mirroring_func (hb_unicode_funcs_t *ufuncs,
hb_unicode_get_mirroring_func_t mirroring_func)
{
if (ufuncs->immutable)
return;
ufuncs->v.get_mirroring = mirroring_func ? mirroring_func : hb_unicode_get_mirroring_nil;
}
void
hb_unicode_funcs_set_general_category_func (hb_unicode_funcs_t *ufuncs,
hb_unicode_get_general_category_func_t general_category_func)
{
if (ufuncs->immutable)
return;
ufuncs->v.get_general_category = general_category_func ? general_category_func : hb_unicode_get_general_category_nil;
}
void
hb_unicode_funcs_set_script_func (hb_unicode_funcs_t *ufuncs,
hb_unicode_get_script_func_t script_func)
{
if (ufuncs->immutable)
return;
ufuncs->v.get_script = script_func ? script_func : hb_unicode_get_script_nil;
}
void
hb_unicode_funcs_set_combining_class_func (hb_unicode_funcs_t *ufuncs,
hb_unicode_get_combining_class_func_t combining_class_func)
{
if (ufuncs->immutable)
return;
ufuncs->v.get_combining_class = combining_class_func ? combining_class_func : hb_unicode_get_combining_class_nil;
}
void
hb_unicode_funcs_set_eastasian_width_func (hb_unicode_funcs_t *ufuncs,
hb_unicode_get_eastasian_width_func_t eastasian_width_func)
{
if (ufuncs->immutable)
return;
ufuncs->v.get_eastasian_width = eastasian_width_func ? eastasian_width_func : hb_unicode_get_eastasian_width_nil;
}
hb_unicode_get_mirroring_func_t
hb_unicode_funcs_get_mirroring_func (hb_unicode_funcs_t *ufuncs)
{
return ufuncs->v.get_mirroring;
}
hb_unicode_get_general_category_func_t
hb_unicode_funcs_get_general_category_func (hb_unicode_funcs_t *ufuncs)
{
return ufuncs->v.get_general_category;
}
hb_unicode_get_script_func_t
hb_unicode_funcs_get_script_func (hb_unicode_funcs_t *ufuncs)
{
return ufuncs->v.get_script;
}
hb_unicode_get_combining_class_func_t
hb_unicode_funcs_get_combining_class_func (hb_unicode_funcs_t *ufuncs)
{
return ufuncs->v.get_combining_class;
}
hb_unicode_get_eastasian_width_func_t
hb_unicode_funcs_get_eastasian_width_func (hb_unicode_funcs_t *ufuncs)
{
return ufuncs->v.get_eastasian_width;
}
hb_codepoint_t
hb_unicode_get_mirroring (hb_unicode_funcs_t *ufuncs,
hb_codepoint_t unicode)
{
return ufuncs->v.get_mirroring (unicode);
}
hb_category_t
hb_unicode_get_general_category (hb_unicode_funcs_t *ufuncs,
hb_codepoint_t unicode)
{
return ufuncs->v.get_general_category (unicode);
}
hb_script_t
hb_unicode_get_script (hb_unicode_funcs_t *ufuncs,
hb_codepoint_t unicode)
{
return ufuncs->v.get_script (unicode);
}
unsigned int
hb_unicode_get_combining_class (hb_unicode_funcs_t *ufuncs,
hb_codepoint_t unicode)
{
return ufuncs->v.get_combining_class (unicode);
}
unsigned int
hb_unicode_get_eastasian_width (hb_unicode_funcs_t *ufuncs,
hb_codepoint_t unicode)
{
return ufuncs->v.get_eastasian_width (unicode);
}
#define LTR HB_DIRECTION_LTR
#define RTL HB_DIRECTION_RTL
const hb_direction_t horiz_dir[] =
{
LTR, /* Zyyy */
LTR, /* Qaai */
RTL, /* Arab */
LTR, /* Armn */
LTR, /* Beng */
LTR, /* Bopo */
LTR, /* Cher */
LTR, /* Qaac */
LTR, /* Cyrl (Cyrs) */
LTR, /* Dsrt */
LTR, /* Deva */
LTR, /* Ethi */
LTR, /* Geor (Geon, Geoa) */
LTR, /* Goth */
LTR, /* Grek */
LTR, /* Gujr */
LTR, /* Guru */
LTR, /* Hani */
LTR, /* Hang */
RTL, /* Hebr */
LTR, /* Hira */
LTR, /* Knda */
LTR, /* Kana */
LTR, /* Khmr */
LTR, /* Laoo */
LTR, /* Latn (Latf, Latg) */
LTR, /* Mlym */
LTR, /* Mong */
LTR, /* Mymr */
LTR, /* Ogam */
LTR, /* Ital */
LTR, /* Orya */
LTR, /* Runr */
LTR, /* Sinh */
RTL, /* Syrc (Syrj, Syrn, Syre) */
LTR, /* Taml */
LTR, /* Telu */
RTL, /* Thaa */
LTR, /* Thai */
LTR, /* Tibt */
LTR, /* Cans */
LTR, /* Yiii */
LTR, /* Tglg */
LTR, /* Hano */
LTR, /* Buhd */
LTR, /* Tagb */
/* Unicode-4.0 additions */
LTR, /* Brai */
RTL, /* Cprt */
LTR, /* Limb */
LTR, /* Osma */
LTR, /* Shaw */
LTR, /* Linb */
LTR, /* Tale */
LTR, /* Ugar */
/* Unicode-4.1 additions */
LTR, /* Talu */
LTR, /* Bugi */
LTR, /* Glag */
LTR, /* Tfng */
LTR, /* Sylo */
LTR, /* Xpeo */
LTR, /* Khar */
/* Unicode-5.0 additions */
LTR, /* Zzzz */
LTR, /* Bali */
LTR, /* Xsux */
RTL, /* Phnx */
LTR, /* Phag */
RTL, /* Nkoo */
/* Unicode-5.1 additions */
LTR, /* Kali */
LTR, /* Lepc */
LTR, /* Rjng */
LTR, /* Sund */
LTR, /* Saur */
LTR, /* Cham */
LTR, /* Olck */
LTR, /* Vaii */
LTR, /* Cari */
LTR, /* Lyci */
LTR, /* Lydi */
/* Unicode-5.2 additions */
RTL, /* Avst */
LTR, /* Bamu */
LTR, /* Egyp */
RTL, /* Armi */
RTL, /* Phli */
RTL, /* Prti */
LTR, /* Java */
LTR, /* Kthi */
LTR, /* Lisu */
LTR, /* Mtei */
RTL, /* Sarb */
RTL, /* Orkh */
RTL, /* Samr */
LTR, /* Lana */
LTR /* Tavt */
};
#undef LTR
#undef RTL
hb_direction_t
_hb_script_get_horizontal_direction (hb_script_t script)
{
if (unlikely ((unsigned int) script >= ARRAY_LENGTH (horiz_dir)))
return HB_DIRECTION_LTR;
return horiz_dir[script];
}
HB_END_DECLS