1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <memdraw.h>
5 #include "devdraw.h"
6 
7 enum
8 {
9 	Nbutton = 10
10 };
11 
12 static int debug;
13 
14 static struct
15 {
16 	int b[Nbutton];
17 	int init;
18 } map;
19 
20 static void
21 initmap(void)
22 {
23 	char *p;
24 	int i;
25 
26 	p = getenv("mousedebug");
27 	if(p && p[0])
28 		debug = atoi(p);
29 
30 	for(i=0; i<Nbutton; i++)
31 		map.b[i] = i;
32 	map.init = 1;
33 	p = getenv("mousebuttonmap");
34 	if(p)
35 		for(i=0; i<Nbutton && p[i]; i++)
36 			if('0' <= p[i] && p[i] <= '9')
37 				map.b[i] = p[i] - '1';
38 	if(debug){
39 		fprint(2, "mousemap: ");
40 		for(i=0; i<Nbutton; i++)
41 			fprint(2, " %d", 1+map.b[i]);
42 		fprint(2, "\n");
43 	}
44 }
45 
46 int
47 mouseswap(int but)
48 {
49 	int i;
50 	int nbut;
51 
52 	if(!map.init)
53 		initmap();
54 	
55 	nbut = 0;
56 	for(i=0; i<Nbutton; i++)
57 		if((but&(1<<i)) && map.b[i] >= 0)
58 			nbut |= 1<<map.b[i];
59 	if(debug)
60 		fprint(2, "swap %#b -> %#b\n", but, nbut);
61 	return nbut;
62 }