diff options
Diffstat (limited to 'gfx/harfbuzz/src/hb-ot-shape-complex-machine-index.hh')
| -rw-r--r-- | gfx/harfbuzz/src/hb-ot-shape-complex-machine-index.hh | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-shape-complex-machine-index.hh b/gfx/harfbuzz/src/hb-ot-shape-complex-machine-index.hh new file mode 100644 index 0000000000..9ec1f3eb7c --- /dev/null +++ b/gfx/harfbuzz/src/hb-ot-shape-complex-machine-index.hh @@ -0,0 +1,69 @@ +/* + * 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 */ |