smallvector.cc

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/* Copyright (C) 2012,2013,2014,2017 Olly Betts
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * IN THE SOFTWARE.
 */
 
#include <config.h>
 
#include "api/smallvector.h"
 
#include <algorithm>
 
void
Xapian::SmallVector_::do_reserve(std::size_t n)
{
    // Logic error or size_t wrapping.
    if (rare(n <= c))
        throw std::bad_alloc();
    void ** blk = new void* [n];
    if (is_external()) {
        std::copy(static_cast<void **>(p[0]),
                  static_cast<void **>(p[1]),
                  blk);
        p[1] = blk +
            (static_cast<void**>(p[1]) - static_cast<void**>(p[0]));
        delete [] static_cast<void**>(p[0]);
    } else {
        std::copy(p, p + c, blk);
        p[1] = blk + c;
    }
    p[0] = blk;
    c = n;
}
 
void
Xapian::SmallVector_::do_free()
{
    delete [] static_cast<void**>(p[0]);
}