File: match_four.c

package info (click to toggle)
mtdev 1.1.5-1
  • links: PTS, VCS
  • area: main
  • in suites: buster, jessie, jessie-kfreebsd, stretch
  • size: 1,528 kB
  • ctags: 394
  • sloc: sh: 11,301; ansic: 1,444; python: 85; makefile: 60
file content (130 lines) | stat: -rw-r--r-- 4,087 bytes parent folder | download | duplicates (2)
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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
#include "match.h"
#include <limits.h>
#include <stdlib.h>

typedef unsigned char u8;
typedef unsigned int u32;

/* generated by mtdev-kernel - do not edit */
static const u8 match_data[] = {
	0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 0, 0, 0, 1, 1,
	1, 0, 0, 0, 1, 2, 1, 1, 0, 2, 2, 1, 2, 0, 0, 0,
	1, 2, 3, 1, 1, 0, 2, 3, 2, 1, 2, 0, 3, 3, 1, 2,
	3, 0, 0, 0, 1, 1, 1, 2, 1, 0, 0, 3, 0, 1, 1, 3,
	1, 0, 2, 2, 3, 1, 2, 0, 0, 4, 0, 1, 2, 2, 4, 2,
	1, 0, 0, 5, 0, 2, 1, 1, 5, 2, 0, 1, 1, 4, 1, 0,
	2, 3, 2, 4, 1, 2, 0, 3, 3, 4, 1, 2, 3, 0, 0, 5,
	0, 1, 2, 3, 2, 5, 2, 1, 0, 3, 3, 5, 2, 1, 3, 0,
	0, 6, 0, 2, 1, 3, 1, 6, 2, 0, 1, 3, 3, 6, 2, 3,
	1, 0, 0, 7, 0, 2, 3, 1, 1, 7, 2, 0, 3, 1, 2, 7,
	2, 3, 0, 1, 0, 0, 1, 1, 2, 2, 1, 2, 1, 0, 0, 3,
	0, 1, 1, 4, 2, 0, 3, 4, 2, 1, 0, 5, 0, 2, 2, 5,
	1, 2, 2, 4, 6, 2, 1, 0, 1, 5, 6, 2, 0, 1, 2, 3,
	7, 1, 2, 0, 0, 5, 7, 0, 2, 1, 1, 3, 8, 1, 0, 2,
	0, 4, 8, 0, 1, 2, 2, 5, 8, 2, 1, 0, 3, 3, 5, 8,
	2, 1, 3, 0, 1, 6, 8, 2, 0, 1, 3, 3, 6, 8, 2, 3,
	1, 0, 1, 7, 8, 2, 0, 3, 1, 2, 7, 8, 2, 3, 0, 1,
	2, 4, 9, 1, 2, 0, 3, 3, 4, 9, 1, 2, 3, 0, 0, 6,
	9, 0, 2, 1, 3, 3, 6, 9, 3, 2, 1, 0, 0, 7, 9, 0,
	2, 3, 1, 2, 7, 9, 3, 2, 0, 1, 1, 4, 10, 1, 0, 2,
	3, 3, 4, 10, 1, 3, 2, 0, 0, 5, 10, 0, 1, 2, 3, 3,
	5, 10, 3, 1, 2, 0, 0, 7, 10, 0, 3, 2, 1, 1, 7, 10,
	3, 0, 2, 1, 1, 4, 11, 1, 0, 3, 2, 2, 4, 11, 1, 3,
	0, 2, 0, 5, 11, 0, 1, 3, 2, 2, 5, 11, 3, 1, 0, 2,
	0, 6, 11, 0, 3, 1, 2, 1, 6, 11, 3, 0, 1, 2, 0, 0,
	1, 1, 2, 2, 3, 3, 1, 2, 1, 0, 0, 3, 0, 1, 1, 4,
	2, 0, 3, 4, 2, 1, 0, 5, 0, 2, 2, 5, 1, 2, 1, 6,
	3, 0, 3, 6, 3, 1, 5, 6, 3, 2, 0, 7, 0, 3, 2, 7,
	1, 3, 4, 7, 2, 3, 2, 4, 6, 2, 1, 0, 1, 5, 6, 2,
	0, 1, 2, 3, 7, 1, 2, 0, 0, 5, 7, 0, 2, 1, 1, 3,
	8, 1, 0, 2, 0, 4, 8, 0, 1, 2, 2, 4, 9, 3, 1, 0,
	1, 5, 9, 3, 0, 1, 2, 7, 9, 3, 2, 0, 5, 7, 9, 3,
	2, 1, 1, 8, 9, 3, 0, 2, 4, 8, 9, 3, 1, 2, 2, 3,
	10, 1, 3, 0, 0, 5, 10, 0, 3, 1, 2, 6, 10, 2, 3, 0,
	5, 6, 10, 2, 3, 1, 0, 8, 10, 0, 3, 2, 3, 8, 10, 1,
	3, 2, 1, 3, 11, 1, 0, 3, 0, 4, 11, 0, 1, 3, 1, 6,
	11, 2, 0, 3, 4, 6, 11, 2, 1, 3, 0, 7, 11, 0, 2, 3,
	3, 7, 11, 1, 2, 3, 3, 6, 9, 12, 3, 2, 1, 0, 2, 7,
	9, 12, 3, 2, 0, 1, 3, 5, 10, 12, 3, 1, 2, 0, 1, 7,
	10, 12, 3, 0, 2, 1, 2, 5, 11, 12, 3, 1, 0, 2, 1, 6,
	11, 12, 3, 0, 1, 2, 3, 6, 8, 13, 2, 3, 1, 0, 2, 7,
	8, 13, 2, 3, 0, 1, 3, 4, 10, 13, 1, 3, 2, 0, 0, 7,
	10, 13, 0, 3, 2, 1, 2, 4, 11, 13, 1, 3, 0, 2, 0, 6,
	11, 13, 0, 3, 1, 2, 3, 5, 8, 14, 2, 1, 3, 0, 1, 7,
	8, 14, 2, 0, 3, 1, 3, 4, 9, 14, 1, 2, 3, 0, 0, 7,
	9, 14, 0, 2, 3, 1, 1, 4, 11, 14, 1, 0, 3, 2, 0, 5,
	11, 14, 0, 1, 3, 2, 2, 5, 8, 15, 2, 1, 0, 3, 1, 6,
	8, 15, 2, 0, 1, 3, 2, 4, 9, 15, 1, 2, 0, 3, 0, 6,
	9, 15, 0, 2, 1, 3, 1, 4, 10, 15, 1, 0, 2, 3, 0, 5,
	10, 15, 0, 1, 2, 3,
};

/* generated by mtdev-kernel - do not edit */
static const int match_index[][5] = {
	{ 0, 0, 1, 3, 6 },
	{ 10, 10, 12, 18, 30 },
	{ 50, 50, 54, 62, 92 },
	{ 164, 164, 170, 194, 230 },
	{ 398, 398, 406, 454, 598 },
	{ 790 }
};

static void set_dist(u32 *dist,
		     const struct trk_coord *b1, const struct trk_coord *e1,
		     const struct trk_coord *b2, const struct trk_coord *e2)
{
	const struct trk_coord *p, *q;

	for (p = b1; p != e1; p++)
		for (q = b2; q != e2; q++)
			*dist++ = abs(q->x - p->x) + abs(q->y - p->y);
}

const u8 *mtdev_match_four(const struct trk_coord *old, int nslot,
			   const struct trk_coord *pos, int npos)
{
	u32 d[16], obj, t;
	const u8 *p, *b, *e;
	const int *at;

	set_dist(d, old, old + nslot, pos, pos + npos);

	at = &match_index[nslot][npos];
	b = &match_data[at[0]];
	e = &match_data[at[1]];

	obj = UINT_MAX, p = b;

	switch (minval(nslot, npos)) {
	case 1:
		for (; b != e; b += npos) {
			t = d[*b++];
			if (t < obj)
				obj = t, p = b;
		}
		break;
	case 2:
		for (; b != e; b += npos) {
			t = d[*b++], t += d[*b++];
			if (t < obj)
				obj = t, p = b;
		}
		break;
	case 3:
		for (; b != e; b += npos) {
			t = d[*b++], t += d[*b++], t += d[*b++];
			if (t < obj)
				obj = t, p = b;
		}
		break;
	case 4:
		for (; b != e; b += npos) {
			t = d[*b++], t += d[*b++], t += d[*b++], t += d[*b++];
			if (t < obj)
				obj = t, p = b;
		}
		break;
	}

	return p;
}