1 /*
2  * Copyright (c) 2011, The Linux Foundation. All rights reserved.
3 
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *   * Redistributions of source code must retain the above copyright
8  *     notice, this list of conditions and the following disclaimer.
9  *   * Redistributions in binary form must reproduce the above
10  *     copyright notice, this list of conditions and the following
11  *     disclaimer in the documentation and/or other materials provided
12  *     with the distribution.
13  *   * Neither the name of The Linux Foundation nor the names of its
14  *     contributors may be used to endorse or promote products derived
15  *     from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include <copybit.h>
31 struct copybit_iterator : public copybit_region_t {
copybit_iteratorcopybit_iterator32     copybit_iterator(const copybit_rect_t& rect) {
33         mRect = rect;
34         mCount = 1;
35         this->next = iterate;
36     }
37 private:
iteratecopybit_iterator38     static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
39         if (!self || !rect) {
40             return 0;
41         }
42 
43         copybit_iterator const* me = static_cast<copybit_iterator const*>(self);
44         if (me->mCount) {
45             rect->l = me->mRect.l;
46             rect->t = me->mRect.t;
47             rect->r = me->mRect.r;
48             rect->b = me->mRect.b;
49             me->mCount--;
50             return 1;
51         }
52         return 0;
53     }
54     copybit_rect_t mRect;
55     mutable int mCount;
56 };
57