1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* Multi-component utility code
* Copyright 2019 Anton Khirnov <anton@khirnov.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MG2D_COMPONENTS_H
#define MG2D_COMPONENTS_H
#include <stdint.h>
#include <stdlib.h>
typedef struct Rect {
ptrdiff_t start[2];
size_t size[2];
} Rect;
typedef struct DomainComponent {
/* points that belong to this component */
Rect interior;
/* interior + ghost points on the physical boundaries */
Rect exterior;
int bnd_is_outer[4];
} DomainComponent;
typedef struct DomainGeometry {
size_t domain_size[2];
unsigned int nb_components;
DomainComponent *components;
} DomainGeometry;
DomainGeometry *mg2di_dg_alloc(unsigned int nb_components);
void mg2di_dg_free(DomainGeometry **dg);
int mg2di_dg_copy(DomainGeometry **dst, const DomainGeometry *src);
/**
* Compute the intersection of src1 and src2, store the result in dst.
*/
int mg2di_rect_intersect(Rect *dst, const Rect *src1, const Rect *src2);
/**
* For the component <comp> in domain geometry <dg>, internal edges are
* rectangles along each non-outer boundary. Edge overlap with component <comp1>
* is the intersection of internal edges of <comp> and exterior of <comp1> (must
* necessarily be a rectangle).
*
* NB: edge overlap of a component with itself is empty.
*
* This function computes, for the given component <comp>
* - edge overlaps of <comp> with every component in dg (i.e. the ghost points
* to be received from each remote component) - written into overlaps_recv
* - edge overlaps of every component in dg with <comp> (i.e. the ghost points
* to be set to each remote component) - written into overlaps_send
*/
int mg2di_dg_edge_overlaps(Rect *overlaps_recv, Rect *overlaps_send,
const DomainGeometry *dg, unsigned int comp,
unsigned int edge_width);
#endif // MG2D_COMPONENTS_H
|
