Stxxl  1.3.2
containers/test_vector_export.cpp

This is an example of use of stxxl::vector::export_files

/***************************************************************************
* containers/test_vector_export.cpp
*
* Part of the STXXL. See http://stxxl.sourceforge.net
*
* Copyright (C) 2008 Johannes Singler <[email protected]>
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
**************************************************************************/
#include <iostream>
#include <algorithm>
#include <stxxl/vector>
#include <stxxl/scan>
typedef stxxl::int64 int64;
int main()
{
try
{
// use non-randomized striping to avoid side effects on random generator
typedef stxxl::VECTOR_GENERATOR<int64, 2, 2, (2 * 1024 * 1024), stxxl::striping>::result vector_type;
vector_type v(int64(64 * 1024 * 1024) / sizeof(int64));
stxxl::random_number32 rnd;
int offset = rnd();
STXXL_MSG("write " << v.size() << " elements");
stxxl::ran32State = 0xdeadbeef;
vector_type::size_type i;
// fill the vector with increasing sequence of integer numbers
for (i = 0; i < v.size(); ++i)
{
v[i] = i + offset;
assert(v[i] == int64(i + offset));
}
v.flush();
STXXL_MSG("export files");
v.export_files("exported_");
}
catch (const std::exception & ex)
{
STXXL_MSG("Caught exception: " << ex.what());
}
catch (...)
{
STXXL_MSG("Caught unknown exception.");
}
return 0;
}