sys/src/libdraw/subfontname.c

   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                 free(tmp2);
  44         }
  45
  46         /* try default */
  47         if(access(t, AREAD) == 0)
  48                 return t;
  49
  50         free(t);
  51         return nil;
  52 }