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#include <foundation/buffer.h>
#include "slab.h"
//------------------------------------------------------------------------------
Buffer::~Buffer()
{
dec_ref();
}
//------------------------------------------------------------------------------
Buffer::Buffer(Buffer&& rhs)
{
move(std::move(rhs));
}
//------------------------------------------------------------------------------
void Buffer::operator = (Buffer&& rhs)
{
move(std::move(rhs));
}
//------------------------------------------------------------------------------
const uint8* Buffer::get_pointer() const
{
return _slab->get_pointer() + _offset;
}
//------------------------------------------------------------------------------
uint32 Buffer::get_size() const
{
return _size;
}
//------------------------------------------------------------------------------
BufferStream Buffer::create_stream() const
{
return BufferStream(_slab, get_pointer(), get_size());
}
//------------------------------------------------------------------------------
BufferRef Buffer::create_ref() const
{
return BufferRef(_slab, get_pointer());
}
//------------------------------------------------------------------------------
void Buffer::inc_ref()
{
if (_slab != nullptr)
_slab->inc_ref();
}
//------------------------------------------------------------------------------
void Buffer::dec_ref()
{
if (_slab != nullptr)
_slab->dec_ref();
_slab = nullptr;
}
//------------------------------------------------------------------------------
Buffer Buffer::create_sub_buffer(uint32 left, uint32 right) const
{
right = std::min<uint32>(right, _size);
return create_sub_buffer(get_pointer() + left, right - left);
}
//------------------------------------------------------------------------------
Buffer Buffer::create_sub_buffer(const uint8* ptr, uint32 size) const
{
uint32 offset = uint32(ptrdiff_t(ptr - get_pointer()));
if (offset >= _size)
return Buffer();
Buffer buffer = clone();
buffer._offset += offset;
buffer._size = size;
return buffer;
}
//------------------------------------------------------------------------------
void Buffer::move(Buffer&& rhs)
{
dec_ref();
std::swap(_slab, rhs._slab);
std::swap(_offset, rhs._offset);
std::swap(_size, rhs._size);
}
//------------------------------------------------------------------------------
Buffer Buffer::clone() const
{
Buffer buffer;
buffer._slab = _slab;
buffer._offset = _offset;
buffer._size = _size;
buffer.inc_ref();
return buffer;
}
//------------------------------------------------------------------------------
uint8* MutableBuffer::get_pointer()
{
return _slab->get_pointer() + _offset;
}
//------------------------------------------------------------------------------
MutableBuffer::MutableBuffer(Slab* slab, uint32 size, uint32 offset)
{
_slab = slab;
_offset = offset;
_size = size;
inc_ref();
}
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