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// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
// Copyright 2011, SIL International, All rights reserved.
#include <cassert>
#include "inc/Sparse.h"
#include "inc/bits.h"
using namespace graphite2;
const sparse::chunk sparse::empty_chunk = {0,0};
sparse::~sparse() throw()
{
if (m_array.map == &empty_chunk) return;
free(m_array.values);
}
sparse::mapped_type sparse::operator [] (const key_type k) const throw()
{
mapped_type g = key_type(k/SIZEOF_CHUNK - m_nchunks) >> (sizeof k*8 - 1);
const chunk & c = m_array.map[g*k/SIZEOF_CHUNK];
const mask_t m = c.mask >> (SIZEOF_CHUNK - 1 - (k%SIZEOF_CHUNK));
g *= m & 1;
return g*m_array.values[g*(c.offset + bit_set_count(m >> 1))];
}
size_t sparse::capacity() const throw()
{
size_t n = m_nchunks,
s = 0;
for (const chunk *ci=m_array.map; n; --n, ++ci)
s += bit_set_count(ci->mask);
return s;
}
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