#include <u.h>#include <libc.h>#include <draw.h> /* * Default version: convert to file name */ char*subfontname(char *cfname, char *fname, int maxdepth){	char *t, *u, *tmp1, *tmp2;	int i; 	t = strdup(cfname);  /* t is the return string */	if(strcmp(cfname, "*default*") == 0)		return t;	if(t[0] != '/'){		tmp2 = strdup(fname);		u = utfrrune(tmp2, '/');		if(u)			u[0] = 0;		else			strcpy(tmp2, ".");		tmp1 = smprint("%s/%s", tmp2, t);		free(tmp2);		free(t);		t = tmp1;	} 	if(maxdepth > 8)		maxdepth = 8; 	for(i=3; i>=0; i--){		if((1<<i) > maxdepth)			continue;		/* try i-bit grey */		tmp2 = smprint("%s.%d", t, i);		if(access(tmp2, AREAD) == 0) {			free(t);			return tmp2;		}		free(tmp2);	} 	/* try default */	if(access(t, AREAD) == 0)		return t; 	free(t);	return nil;}