1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
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
|
/*
* Copyright © 2019,2020 David Corbett
*
* 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.
*/
#ifndef HB_OT_SHAPE_COMPLEX_MACHINE_INDEX_HH
#define HB_OT_SHAPE_COMPLEX_MACHINE_INDEX_HH
#include "hb.hh"
template <typename Iter>
struct machine_index_t :
hb_iter_with_fallback_t<machine_index_t<Iter>,
typename Iter::item_t>
{
machine_index_t (const Iter& it) : it (it) {}
machine_index_t (const machine_index_t& o) : it (o.it) {}
static constexpr bool is_random_access_iterator = Iter::is_random_access_iterator;
static constexpr bool is_sorted_iterator = Iter::is_sorted_iterator;
typename Iter::item_t __item__ () const { return *it; }
typename Iter::item_t __item_at__ (unsigned i) const { return it[i]; }
unsigned __len__ () const { return it.len (); }
void __next__ () { ++it; }
void __forward__ (unsigned n) { it += n; }
void __prev__ () { --it; }
void __rewind__ (unsigned n) { it -= n; }
void operator = (unsigned n)
{ unsigned index = (*it).first; if (index < n) it += n - index; else if (index > n) it -= index - n; }
void operator = (const machine_index_t& o) { *this = (*o.it).first; }
bool operator == (const machine_index_t& o) const { return (*it).first == (*o.it).first; }
bool operator != (const machine_index_t& o) const { return !(*this == o); }
private:
Iter it;
};
struct
{
template <typename Iter,
hb_requires (hb_is_iterable (Iter))>
machine_index_t<hb_iter_type<Iter>>
operator () (Iter&& it) const
{ return machine_index_t<hb_iter_type<Iter>> (hb_iter (it)); }
}
HB_FUNCOBJ (machine_index);
#endif /* HB_OT_SHAPE_COMPLEX_MACHINE_INDEX_HH */
|
