114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
/*
|
|
|
|
Copyright (c) 2015-2016, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TORRENT_STACK_ALLOCATOR
|
|
|
|
#include "libtorrent/assert.hpp"
|
|
#include "libtorrent/buffer.hpp"
|
|
|
|
namespace libtorrent { namespace aux
|
|
{
|
|
|
|
struct stack_allocator
|
|
{
|
|
stack_allocator() {}
|
|
|
|
int copy_string(std::string const& str)
|
|
{
|
|
int ret = int(m_storage.size());
|
|
m_storage.resize(ret + str.length() + 1);
|
|
strcpy(&m_storage[ret], str.c_str());
|
|
return ret;
|
|
}
|
|
|
|
int copy_string(char const* str)
|
|
{
|
|
int ret = int(m_storage.size());
|
|
int len = strlen(str);
|
|
m_storage.resize(ret + len + 1);
|
|
strcpy(&m_storage[ret], str);
|
|
return ret;
|
|
}
|
|
|
|
int copy_buffer(char const* buf, int size)
|
|
{
|
|
int ret = int(m_storage.size());
|
|
m_storage.resize(ret + size);
|
|
memcpy(&m_storage[ret], buf, size);
|
|
return ret;
|
|
}
|
|
|
|
int allocate(int bytes)
|
|
{
|
|
int ret = int(m_storage.size());
|
|
m_storage.resize(ret + bytes);
|
|
return ret;
|
|
}
|
|
|
|
char* ptr(int idx)
|
|
{
|
|
TORRENT_ASSERT(idx >= 0);
|
|
TORRENT_ASSERT(idx < int(m_storage.size()));
|
|
return &m_storage[idx];
|
|
}
|
|
|
|
char const* ptr(int idx) const
|
|
{
|
|
TORRENT_ASSERT(idx >= 0);
|
|
TORRENT_ASSERT(idx < int(m_storage.size()));
|
|
return &m_storage[idx];
|
|
}
|
|
|
|
void swap(stack_allocator& rhs)
|
|
{
|
|
m_storage.swap(rhs.m_storage);
|
|
}
|
|
|
|
void reset()
|
|
{
|
|
m_storage.clear();
|
|
}
|
|
|
|
private:
|
|
|
|
// non-copyable
|
|
stack_allocator(stack_allocator const&);
|
|
stack_allocator& operator=(stack_allocator const&);
|
|
|
|
buffer m_storage;
|
|
};
|
|
|
|
} }
|
|
|
|
#endif
|
|
|