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/*
* Copyright © 2012,2017 Google, Inc.
* Copyright © 2021 Behdad Esfahbod
*
* 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.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_SET_HH
#define HB_SET_HH
#include "hb.hh"
#include "hb-bit-set-invertible.hh"
template <typename impl_t>
struct hb_sparseset_t
{
hb_object_header_t header;
impl_t s;
hb_sparseset_t () { init (); }
~hb_sparseset_t () { fini (); }
hb_sparseset_t (const hb_sparseset_t& other) : hb_sparseset_t () { set (other); }
hb_sparseset_t (hb_sparseset_t&& other) : hb_sparseset_t () { s = std::move (other.s); }
hb_sparseset_t& operator= (const hb_sparseset_t& other) { set (other); return *this; }
hb_sparseset_t& operator= (hb_sparseset_t&& other) { hb_swap (*this, other); return *this; }
friend void swap (hb_sparseset_t& a, hb_sparseset_t& b) { hb_swap (a.s, b.s); }
hb_sparseset_t (std::initializer_list<hb_codepoint_t> lst) : hb_sparseset_t ()
{
for (auto&& item : lst)
add (item);
}
template <typename Iterable,
hb_requires (hb_is_iterable (Iterable))>
hb_sparseset_t (const Iterable &o) : hb_sparseset_t ()
{
hb_copy (o, *this);
}
void init_shallow () { s.init (); }
void init ()
{
hb_object_init (this);
init_shallow ();
}
void fini_shallow () { s.fini (); }
void fini ()
{
hb_object_fini (this);
fini_shallow ();
}
explicit operator bool () const { return !is_empty (); }
void err () { s.err (); }
bool in_error () const { return s.in_error (); }
void reset () { s.reset (); }
void clear () { s.clear (); }
void invert () { s.invert (); }
bool is_empty () const { return s.is_empty (); }
void add (hb_codepoint_t g) { s.add (g); }
bool add_range (hb_codepoint_t a, hb_codepoint_t b) { return s.add_range (a, b); }
template <typename T>
void add_array (const T *array, unsigned int count, unsigned int stride=sizeof(T))
{ s.add_array (array, count, stride); }
template <typename T>
void add_array (const hb_array_t<const T>& arr) { add_array (&arr, arr.len ()); }
/* Might return false if array looks unsorted.
* Used for faster rejection of corrupt data. */
template <typename T>
bool add_sorted_array (const T *array, unsigned int count, unsigned int stride=sizeof(T))
{ return s.add_sorted_array (array, count, stride); }
template <typename T>
bool add_sorted_array (const hb_sorted_array_t<const T>& arr) { return add_sorted_array (&arr, arr.len ()); }
void del (hb_codepoint_t g) { s.del (g); }
void del_range (hb_codepoint_t a, hb_codepoint_t b) { s.del_range (a, b); }
bool get (hb_codepoint_t g) const { return s.get (g); }
/* Has interface. */
static constexpr bool SENTINEL = false;
typedef bool value_t;
value_t operator [] (hb_codepoint_t k) const { return get (k); }
bool has (hb_codepoint_t k) const { return (*this)[k] != SENTINEL; }
/* Predicate. */
bool operator () (hb_codepoint_t k) const { return has (k); }
/* Sink interface. */
hb_sparseset_t& operator << (hb_codepoint_t v)
{ add (v); return *this; }
hb_sparseset_t& operator << (const hb_pair_t<hb_codepoint_t, hb_codepoint_t>& range)
{ add_range (range.first, range.second); return *this; }
bool intersects (hb_codepoint_t first, hb_codepoint_t last) const
{ return s.intersects (first, last); }
void set (const hb_sparseset_t &other) { s.set (other.s); }
bool is_equal (const hb_sparseset_t &other) const { return s.is_equal (other.s); }
bool is_subset (const hb_sparseset_t &larger_set) const { return s.is_subset (larger_set.s); }
void union_ (const hb_sparseset_t &other) { s.union_ (other.s); }
void intersect (const hb_sparseset_t &other) { s.intersect (other.s); }
void subtract (const hb_sparseset_t &other) { s.subtract (other.s); }
void symmetric_difference (const hb_sparseset_t &other) { s.symmetric_difference (other.s); }
bool next (hb_codepoint_t *codepoint) const { return s.next (codepoint); }
bool previous (hb_codepoint_t *codepoint) const { return s.previous (codepoint); }
bool next_range (hb_codepoint_t *first, hb_codepoint_t *last) const
{ return s.next_range (first, last); }
bool previous_range (hb_codepoint_t *first, hb_codepoint_t *last) const
{ return s.previous_range (first, last); }
unsigned int next_many (hb_codepoint_t codepoint, hb_codepoint_t *out, unsigned int size) const
{ return s.next_many (codepoint, out, size); }
unsigned int get_population () const { return s.get_population (); }
hb_codepoint_t get_min () const { return s.get_min (); }
hb_codepoint_t get_max () const { return s.get_max (); }
static constexpr hb_codepoint_t INVALID = impl_t::INVALID;
/*
* Iterator implementation.
*/
using iter_t = typename impl_t::iter_t;
iter_t iter () const { return iter_t (this->s); }
operator iter_t () const { return iter (); }
};
struct hb_set_t : hb_sparseset_t<hb_bit_set_invertible_t>
{
hb_set_t () = default;
~hb_set_t () = default;
hb_set_t (hb_set_t&) = default;
hb_set_t& operator= (const hb_set_t&) = default;
hb_set_t& operator= (hb_set_t&&) = default;
hb_set_t (std::initializer_list<hb_codepoint_t> lst) : hb_sparseset_t<hb_bit_set_invertible_t> (lst) {}
template <typename Iterable,
hb_requires (hb_is_iterable (Iterable))>
hb_set_t (const Iterable &o) : hb_sparseset_t<hb_bit_set_invertible_t> (o) {}
};
static_assert (hb_set_t::INVALID == HB_SET_VALUE_INVALID, "");
#endif /* HB_SET_HH */
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