1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 
5 /*
6  * Default version: convert to file name
7  */
8 
9 char*
10 subfontname(char *cfname, char *fname, int maxdepth)
11 {
12 	char *t, *u, tmp1[64], tmp2[64];
13 	int i;
14 
15 	if(strcmp(cfname, "*default*") == 0)
16 		return strdup(cfname);
17 	t = cfname;
18 	if(t[0] != '/'){
19 		snprint(tmp2, sizeof tmp2, "%s", fname);
20 		u = utfrrune(tmp2, '/');
21 		if(u)
22 			u[0] = 0;
23 		else
24 			strcpy(tmp2, ".");
25 		snprint(tmp1, sizeof tmp1, "%s/%s", tmp2, t);
26 		t = tmp1;
27 	}
28 
29 	if(maxdepth > 8)
30 		maxdepth = 8;
31 
32 	for(i=3; i>=0; i--){
33 		if((1<<i) > maxdepth)
34 			continue;
35 		/* try i-bit grey */
36 		snprint(tmp2, sizeof tmp2, "%s.%d", t, i);
37 		if(access(tmp2, AREAD) == 0)
38 			return strdup(tmp2);
39 	}
40 
41 	/* try default */
42 	if(access(t, AREAD) == 0)
43 		return strdup(t);
44 
45 	return nil;
46 }