third_party/harfbuzz-ng/src/hb-unicode.c - chromium/src - Git at Google

 /*
  * 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 */

   /* Unicode-6.0 additions */
   LTR,	/* Batk */
   LTR,	/* Brah */
   RTL 	/* Mand */
 };
 #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
	/*
	* 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 */

	/* Unicode-6.0 additions */
	LTR, /* Batk */
	LTR, /* Brah */
	RTL /* Mand */
	};
	#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