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/*
* Copyright © 2022 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.
*/
#ifndef HB_MULTIMAP_HH
#define HB_MULTIMAP_HH
#include "hb.hh"
#include "hb-map.hh"
#include "hb-vector.hh"
/*
* hb_multimap_t
*/
struct hb_multimap_t
{
void add (hb_codepoint_t k, hb_codepoint_t v)
{
hb_codepoint_t *i;
if (multiples_indices.has (k, &i))
{
multiples_values[*i].push (v);
return;
}
hb_codepoint_t *old_v;
if (singulars.has (k, &old_v))
{
hb_codepoint_t old = *old_v;
singulars.del (k);
multiples_indices.set (k, multiples_values.length);
auto *vec = multiples_values.push ();
vec->push (old);
vec->push (v);
return;
}
singulars.set (k, v);
}
hb_array_t<const hb_codepoint_t> get (hb_codepoint_t k) const
{
const hb_codepoint_t *v;
if (singulars.has (k, &v))
return hb_array (v, 1);
hb_codepoint_t *i;
if (multiples_indices.has (k, &i))
return multiples_values[*i].as_array ();
return hb_array_t<const hb_codepoint_t> ();
}
bool in_error () const
{
return singulars.in_error () || multiples_indices.in_error () || multiples_values.in_error ();
}
protected:
hb_map_t singulars;
hb_map_t multiples_indices;
hb_vector_t<hb_vector_t<hb_codepoint_t>> multiples_values;
};
#endif /* HB_MULTIMAP_HH */
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