1/**
2 * Copyright (c) 2006-2023 LOVE Development Team
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 *
8 * Permission is granted to anyone to use this software for any purpose,
9 * including commercial applications, and to alter it and redistribute it
10 * freely, subject to the following restrictions:
11 *
12 * 1. The origin of this software must not be misrepresented; you must not
13 * claim that you wrote the original software. If you use this software
14 * in a product, an acknowledgment in the product documentation would be
15 * appreciated but is not required.
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 * 3. This notice may not be removed or altered from any source distribution.
19 **/
20
21#include "DataView.h"
22#include "common/Exception.h"
23#include "common/int.h"
24
25namespace love
26{
27namespace data
28{
29
30love::Type DataView::type("DataView", &Data::type);
31
32DataView::DataView(Data *data, size_t offset, size_t size)
33 : data(data)
34 , offset(offset)
35 , size(size)
36{
37 if (offset >= data->getSize() || size > data->getSize() || offset > data->getSize() - size)
38 throw love::Exception("Offset and size of Data View must fit within the original Data's size.");
39
40 if (size == 0)
41 throw love::Exception("DataView size must be greater than 0.");
42}
43
44DataView::DataView(const DataView &d)
45 : data(d.data)
46 , offset(d.offset)
47 , size(d.size)
48{
49}
50
51DataView::~DataView()
52{
53}
54
55DataView *DataView::clone() const
56{
57 return new DataView(*this);
58}
59
60void *DataView::getData() const
61{
62 return (uint8 *) data->getData() + offset;
63}
64
65size_t DataView::getSize() const
66{
67 return size;
68}
69
70} // data
71} // love
72