Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79.

third_party/harfbuzz-ng/src/hb-unicode.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 */
-
-  /* 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