JDK14/Java14源码在线阅读

/*
 * Copyright 漏 2009  Red Hat, Inc.
 * Copyright 漏 2011  Codethink Limited
 * Copyright 漏 2010,2011,2012  Google, 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
 * Codethink Author(s): Ryan Lortie
 * Google Author(s): Behdad Esfahbod
 */

#include "hb.hh"

#include "hb-unicode.hh"


/**
 * SECTION: hb-unicode
 * @title: hb-unicode
 * @short_description: Unicode character property access
 * @include: hb.h
 *
 * Unicode functions are used to access Unicode character properties.
 * Client can pass its own Unicode functions to HarfBuzz, or access
 * the built-in Unicode functions that come with HarfBuzz.
 *
 * With the Unicode functions, one can query variour Unicode character
 * properties, such as General Category, Script, Combining Class, etc.
 **/


/*
 * hb_unicode_funcs_t
 */

static hb_unicode_combining_class_t
hb_unicode_combining_class_nil (hb_unicode_funcs_t *ufuncs    HB_UNUSED,
                                hb_codepoint_t      unicode   HB_UNUSED,
                                void               *user_data HB_UNUSED)
{
  return HB_UNICODE_COMBINING_CLASS_NOT_REORDERED;
}

static unsigned int
hb_unicode_eastasian_width_nil (hb_unicode_funcs_t *ufuncs    HB_UNUSED,
                                hb_codepoint_t      unicode   HB_UNUSED,
                                void               *user_data HB_UNUSED)
{
  return 1;
}

static hb_unicode_general_category_t
hb_unicode_general_category_nil (hb_unicode_funcs_t *ufuncs    HB_UNUSED,
                                 hb_codepoint_t      unicode   HB_UNUSED,
                                 void               *user_data HB_UNUSED)
{
  return HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER;
}

static hb_codepoint_t
hb_unicode_mirroring_nil (hb_unicode_funcs_t *ufuncs    HB_UNUSED,
                          hb_codepoint_t      unicode,
                          void               *user_data HB_UNUSED)
{
  return unicode;
}

static hb_script_t
hb_unicode_script_nil (hb_unicode_funcs_t *ufuncs    HB_UNUSED,
                       hb_codepoint_t      unicode   HB_UNUSED,
                       void               *user_data HB_UNUSED)
{
  return HB_SCRIPT_UNKNOWN;
}

static hb_bool_t
hb_unicode_compose_nil (hb_unicode_funcs_t *ufuncs    HB_UNUSED,
                        hb_codepoint_t      a         HB_UNUSED,
                        hb_codepoint_t      b         HB_UNUSED,
                        hb_codepoint_t     *ab        HB_UNUSED,
                        void               *user_data HB_UNUSED)
{
  return false;
}

static hb_bool_t
hb_unicode_decompose_nil (hb_unicode_funcs_t *ufuncs    HB_UNUSED,
                          hb_codepoint_t      ab        HB_UNUSED,
                          hb_codepoint_t     *a         HB_UNUSED,
                          hb_codepoint_t     *b         HB_UNUSED,
                          void               *user_data HB_UNUSED)
{
  return false;
}


static unsigned int
hb_unicode_decompose_compatibility_nil (hb_unicode_funcs_t *ufuncs     HB_UNUSED,
                                        hb_codepoint_t      u          HB_UNUSED,
                                        hb_codepoint_t     *decomposed HB_UNUSED,
                                        void               *user_data  HB_UNUSED)
{
  return 0;
}


extern "C" hb_unicode_funcs_t *hb_glib_get_unicode_funcs ();
extern "C" hb_unicode_funcs_t *hb_icu_get_unicode_funcs ();
extern "C" hb_unicode_funcs_t *hb_ucdn_get_unicode_funcs ();

hb_unicode_funcs_t *
hb_unicode_funcs_get_default ()
{
#if defined(HAVE_UCDN)
  return hb_ucdn_get_unicode_funcs ();
#elif defined(HAVE_GLIB)
  return hb_glib_get_unicode_funcs ();
#elif defined(HAVE_ICU) && defined(HAVE_ICU_BUILTIN)
  return hb_icu_get_unicode_funcs ();
#else
#define HB_UNICODE_FUNCS_NIL 1
  return hb_unicode_funcs_get_empty ();
#endif
}

#if !defined(HB_NO_UNICODE_FUNCS) && defined(HB_UNICODE_FUNCS_NIL)
#error "Could not find any Unicode functions implementation, you have to provide your own"
#error "Consider building hb-ucdn.c.  If you absolutely want to build without any, check the code."
#endif

/**
 * hb_unicode_funcs_create: (Xconstructor)
 * @parent: (nullable):
 *
 *
 *
 * Return value: (transfer full):
 *
 * Since: 0.9.2
 **/
hb_unicode_funcs_t *
hb_unicode_funcs_create (hb_unicode_funcs_t *parent)
{
  hb_unicode_funcs_t *ufuncs;

  if (!(ufuncs = hb_object_create<hb_unicode_funcs_t> ()))
    return hb_unicode_funcs_get_empty ();

  if (!parent)
    parent = hb_unicode_funcs_get_empty ();

  hb_unicode_funcs_make_immutable (parent);
  ufuncs->parent = hb_unicode_funcs_reference (parent);

  ufuncs->func = parent->func;

  /* We can safely copy user_data from parent since we hold a reference
   * onto it and it's immutable.  We should not copy the destroy notifiers
   * though. */
  ufuncs->user_data = parent->user_data;

  return ufuncs;
}


DEFINE_NULL_INSTANCE (hb_unicode_funcs_t) =
{
  HB_OBJECT_HEADER_STATIC,

  nullptr, /* parent */
  {
#define HB_UNICODE_FUNC_IMPLEMENT(name) hb_unicode_##name##_nil,
    HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_UNICODE_FUNC_IMPLEMENT
  }
};

/**
 * hb_unicode_funcs_get_empty:
 *
 *
 *
 * Return value: (transfer full):
 *
 * Since: 0.9.2
 **/
hb_unicode_funcs_t *
hb_unicode_funcs_get_empty ()
{
  return const_cast<hb_unicode_funcs_t *> (&Null(hb_unicode_funcs_t));
}

/**
 * hb_unicode_funcs_reference: (skip)
 * @ufuncs: Unicode functions.
 *
 *
 *
 * Return value: (transfer full):
 *
 * Since: 0.9.2
 **/
hb_unicode_funcs_t *
hb_unicode_funcs_reference (hb_unicode_funcs_t *ufuncs)
{
  return hb_object_reference (ufuncs);
}

/**
 * hb_unicode_funcs_destroy: (skip)
 * @ufuncs: Unicode functions.
 *
 *
 *
 * Since: 0.9.2
 **/
void
hb_unicode_funcs_destroy (hb_unicode_funcs_t *ufuncs)
{
  if (!hb_object_destroy (ufuncs)) return;

#define HB_UNICODE_FUNC_IMPLEMENT(name) \
  if (ufuncs->destroy.name) ufuncs->destroy.name (ufuncs->user_data.name);
    HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_UNICODE_FUNC_IMPLEMENT

  hb_unicode_funcs_destroy (ufuncs->parent);

  free (ufuncs);
}

/**
 * hb_unicode_funcs_set_user_data: (skip)
 * @ufuncs: Unicode functions.
 * @key:
 * @data:
 * @destroy:
 * @replace:
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_bool_t
hb_unicode_funcs_set_user_data (hb_unicode_funcs_t *ufuncs,
                                hb_user_data_key_t *key,
                                void *              data,
                                hb_destroy_func_t   destroy,
                                hb_bool_t           replace)
{
  return hb_object_set_user_data (ufuncs, key, data, destroy, replace);
}

/**
 * hb_unicode_funcs_get_user_data: (skip)
 * @ufuncs: Unicode functions.
 * @key:
 *
 *
 *
 * Return value: (transfer none):
 *
 * Since: 0.9.2
 **/
void *
hb_unicode_funcs_get_user_data (hb_unicode_funcs_t *ufuncs,
                                hb_user_data_key_t *key)
{
  return hb_object_get_user_data (ufuncs, key);
}


/**
 * hb_unicode_funcs_make_immutable:
 * @ufuncs: Unicode functions.
 *
 *
 *
 * Since: 0.9.2
 **/
void
hb_unicode_funcs_make_immutable (hb_unicode_funcs_t *ufuncs)
{
  if (hb_object_is_immutable (ufuncs))
    return;

  hb_object_make_immutable (ufuncs);
}

/**
 * hb_unicode_funcs_is_immutable:
 * @ufuncs: Unicode functions.
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_bool_t
hb_unicode_funcs_is_immutable (hb_unicode_funcs_t *ufuncs)
{
  return hb_object_is_immutable (ufuncs);
}

/**
 * hb_unicode_funcs_get_parent:
 * @ufuncs: Unicode functions.
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_unicode_funcs_t *
hb_unicode_funcs_get_parent (hb_unicode_funcs_t *ufuncs)
{
  return ufuncs->parent ? ufuncs->parent : hb_unicode_funcs_get_empty ();
}


#define HB_UNICODE_FUNC_IMPLEMENT(name)                                         \
                                                                                \
void                                                                            \
hb_unicode_funcs_set_##name##_func (hb_unicode_funcs_t             *ufuncs,     \
                                    hb_unicode_##name##_func_t      func,       \
                                    void                           *user_data,  \
                                    hb_destroy_func_t               destroy)    \
{                                                                               \
  if (hb_object_is_immutable (ufuncs))                                          \
    return;                                                                     \
                                                                                \
  if (ufuncs->destroy.name)                                                     \
    ufuncs->destroy.name (ufuncs->user_data.name);                              \
                                                                                \
  if (func) {                                                                   \
    ufuncs->func.name = func;                                                   \
    ufuncs->user_data.name = user_data;                                         \
    ufuncs->destroy.name = destroy;                                             \
  } else {                                                                      \
    ufuncs->func.name = ufuncs->parent->func.name;                              \
    ufuncs->user_data.name = ufuncs->parent->user_data.name;                    \
    ufuncs->destroy.name = nullptr;                                             \
  }                                                                             \
}

HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_UNICODE_FUNC_IMPLEMENT


#define HB_UNICODE_FUNC_IMPLEMENT(return_type, name)                            \
                                                                                \
return_type                                                                     \
hb_unicode_##name (hb_unicode_funcs_t *ufuncs,                                  \
                   hb_codepoint_t      unicode)                                 \
{                                                                               \
  return ufuncs->name (unicode);                                                \
}
HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE
#undef HB_UNICODE_FUNC_IMPLEMENT

/**
 * hb_unicode_compose:
 * @ufuncs: Unicode functions.
 * @a:
 * @b:
 * @ab: (out):
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_bool_t
hb_unicode_compose (hb_unicode_funcs_t *ufuncs,
                    hb_codepoint_t      a,
                    hb_codepoint_t      b,
                    hb_codepoint_t     *ab)
{
  return ufuncs->compose (a, b, ab);
}

/**
 * hb_unicode_decompose:
 * @ufuncs: Unicode functions.
 * @ab:
 * @a: (out):
 * @b: (out):
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_bool_t
hb_unicode_decompose (hb_unicode_funcs_t *ufuncs,
                      hb_codepoint_t      ab,
                      hb_codepoint_t     *a,
                      hb_codepoint_t     *b)
{
  return ufuncs->decompose (ab, a, b);
}

/**
 * hb_unicode_decompose_compatibility:
 * @ufuncs: Unicode functions.
 * @u:
 * @decomposed: (out):
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 * Deprecated: 2.0.0
 **/
unsigned int
hb_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs,
                                    hb_codepoint_t      u,
                                    hb_codepoint_t     *decomposed)
{
  return ufuncs->decompose_compatibility (u, decomposed);
}


/* See hb-unicode.hh for details. */
const uint8_t
_hb_modified_combining_class[256] =
{
  0, /* HB_UNICODE_COMBINING_CLASS_NOT_REORDERED */
  1, /* HB_UNICODE_COMBINING_CLASS_OVERLAY */
  2, 3, 4, 5, 6,
  7, /* HB_UNICODE_COMBINING_CLASS_NUKTA */
  8, /* HB_UNICODE_COMBINING_CLASS_KANA_VOICING */
  9, /* HB_UNICODE_COMBINING_CLASS_VIRAMA */

  /* Hebrew */
  HB_MODIFIED_COMBINING_CLASS_CCC10,
  HB_MODIFIED_COMBINING_CLASS_CCC11,
  HB_MODIFIED_COMBINING_CLASS_CCC12,
  HB_MODIFIED_COMBINING_CLASS_CCC13,
  HB_MODIFIED_COMBINING_CLASS_CCC14,
  HB_MODIFIED_COMBINING_CLASS_CCC15,
  HB_MODIFIED_COMBINING_CLASS_CCC16,
  HB_MODIFIED_COMBINING_CLASS_CCC17,
  HB_MODIFIED_COMBINING_CLASS_CCC18,
  HB_MODIFIED_COMBINING_CLASS_CCC19,
  HB_MODIFIED_COMBINING_CLASS_CCC20,
  HB_MODIFIED_COMBINING_CLASS_CCC21,
  HB_MODIFIED_COMBINING_CLASS_CCC22,
  HB_MODIFIED_COMBINING_CLASS_CCC23,
  HB_MODIFIED_COMBINING_CLASS_CCC24,
  HB_MODIFIED_COMBINING_CLASS_CCC25,
  HB_MODIFIED_COMBINING_CLASS_CCC26,

  /* Arabic */
  HB_MODIFIED_COMBINING_CLASS_CCC27,
  HB_MODIFIED_COMBINING_CLASS_CCC28,
  HB_MODIFIED_COMBINING_CLASS_CCC29,
  HB_MODIFIED_COMBINING_CLASS_CCC30,
  HB_MODIFIED_COMBINING_CLASS_CCC31,
  HB_MODIFIED_COMBINING_CLASS_CCC32,
  HB_MODIFIED_COMBINING_CLASS_CCC33,
  HB_MODIFIED_COMBINING_CLASS_CCC34,
  HB_MODIFIED_COMBINING_CLASS_CCC35,

  /* Syriac */
  HB_MODIFIED_COMBINING_CLASS_CCC36,

  37, 38, 39,
  40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
  60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
  80, 81, 82, 83,

  /* Telugu */
  HB_MODIFIED_COMBINING_CLASS_CCC84,
  85, 86, 87, 88, 89, 90,
  HB_MODIFIED_COMBINING_CLASS_CCC91,
  92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102,

  /* Thai */
  HB_MODIFIED_COMBINING_CLASS_CCC103,
  104, 105, 106,
  HB_MODIFIED_COMBINING_CLASS_CCC107,
  108, 109, 110, 111, 112, 113, 114, 115, 116, 117,

  /* Lao */
  HB_MODIFIED_COMBINING_CLASS_CCC118,
  119, 120, 121,
  HB_MODIFIED_COMBINING_CLASS_CCC122,
  123, 124, 125, 126, 127, 128,

  /* Tibetan */
  HB_MODIFIED_COMBINING_CLASS_CCC129,
  HB_MODIFIED_COMBINING_CLASS_CCC130,
  131,
  HB_MODIFIED_COMBINING_CLASS_CCC132,
  133, 134, 135, 136, 137, 138, 139,


  140, 141, 142, 143, 144, 145, 146, 147, 148, 149,

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