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/*
* Copyright © 2007,2008,2009 Red Hat, Inc.
* Copyright © 2010,2012 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
* Google Author(s): Behdad Esfahbod, Garret Rieger
*/
#ifndef OT_LAYOUT_COMMON_RANGERECORD_HH
#define OT_LAYOUT_COMMON_RANGERECORD_HH
namespace OT {
namespace Layout {
namespace Common {
template <typename Types>
struct RangeRecord
{
typename Types::HBGlyphID first; /* First GlyphID in the range */
typename Types::HBGlyphID last; /* Last GlyphID in the range */
HBUINT16 value; /* Value */
DEFINE_SIZE_STATIC (2 + 2 * Types::size);
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
int cmp (hb_codepoint_t g) const
{ return g < first ? -1 : g <= last ? 0 : +1; }
HB_INTERNAL static int cmp_range (const void *pa, const void *pb) {
const RangeRecord *a = (const RangeRecord *) pa;
const RangeRecord *b = (const RangeRecord *) pb;
if (a->first < b->first) return -1;
if (a->first > b->first) return +1;
if (a->last < b->last) return -1;
if (a->last > b->last) return +1;
if (a->value < b->value) return -1;
if (a->value > b->value) return +1;
return 0;
}
unsigned get_population () const
{
if (unlikely (last < first)) return 0;
return (last - first + 1);
}
bool intersects (const hb_set_t &glyphs) const
{ return glyphs.intersects (first, last); }
template <typename set_t>
bool collect_coverage (set_t *glyphs) const
{ return glyphs->add_range (first, last); }
};
}
}
}
// TODO(garretrieger): This was previously implemented using
// DECLARE_NULL_NAMESPACE_BYTES_TEMPLATE1 (OT, RangeRecord, 9);
// but that only works when there is only a single namespace level.
// The macro should probably be fixed so it can work in this situation.
extern HB_INTERNAL const unsigned char _hb_Null_OT_RangeRecord[9];
template <typename Spec>
struct Null<OT::Layout::Common::RangeRecord<Spec>> {
static OT::Layout::Common::RangeRecord<Spec> const & get_null () {
return *reinterpret_cast<const OT::Layout::Common::RangeRecord<Spec> *> (_hb_Null_OT_RangeRecord);
}
};
#endif // #ifndef OT_LAYOUT_COMMON_RANGERECORD_HH