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, *tmp2;
13 	int i;
14 
15 	t = strdup(cfname);  /* t is the return string */
16 	if(strcmp(cfname, "*default*") == 0)
17 		return t;
18 	if(t[0] != '/'){
19 		tmp2 = strdup(fname);
20 		u = utfrrune(tmp2, '/');
21 		if(u)
22 			u[0] = 0;
23 		else
24 			strcpy(tmp2, ".");
25 		tmp1 = smprint("%s/%s", tmp2, t);
26 		free(tmp2);
27 		free(t);
28 		t = tmp1;
29 	}
30 
31 	if(maxdepth > 8)
32 		maxdepth = 8;
33 
34 	for(i=3; i>=0; i--){
35 		if((1<<i) > maxdepth)
36 			continue;
37 		/* try i-bit grey */
38 		tmp2 = smprint("%s.%d", t, i);
39 		if(access(tmp2, AREAD) == 0) {
40 			free(t);
41 			return tmp2;
42 		}
43 	}
44 
45 	/* try default */
46 	if(access(t, AREAD) == 0)
47 		return t;
48 
49 	return nil;
50 }