tsubfontname.c - plan9port - [fork] Plan 9 from user space
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       ---
       tsubfontname.c (1158B)
       ---
            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, *base;
           13         int i, scale;
           14 
           15         scale = parsefontscale(fname, &base);
           16 
           17         t = strdup(cfname);  /* t is the return string */
           18         if(strcmp(cfname, "*default*") == 0) {
           19                 if(scale > 1) {
           20                         free(t);
           21                         return smprint("%d*%s", scale, cfname);
           22                 }
           23                 return t;
           24         }
           25         if(t[0] != '/'){
           26                 tmp2 = strdup(base);
           27                 u = utfrrune(tmp2, '/');
           28                 if(u)
           29                         u[0] = 0;
           30                 else
           31                         strcpy(tmp2, ".");
           32                 tmp1 = smprint("%s/%s", tmp2, t);
           33                 free(tmp2);
           34                 free(t);
           35                 t = tmp1;
           36         }
           37 
           38         if(maxdepth > 8)
           39                 maxdepth = 8;
           40 
           41         for(i=3; i>=0; i--){
           42                 if((1<<i) > maxdepth)
           43                         continue;
           44                 /* try i-bit grey */
           45                 tmp2 = smprint("%s.%d", t, i);
           46                 if(access(tmp2, AREAD) == 0) {
           47                         free(t);
           48                         if(scale > 1) {
           49                                 t = smprint("%d*%s", scale, tmp2);
           50                                 free(tmp2);
           51                                 tmp2 = t;
           52                         }
           53                         return tmp2;
           54                 }
           55                 free(tmp2);
           56         }
           57 
           58         /* try default */
           59         if(strncmp(t, "/mnt/font/", 10) == 0 || access(t, AREAD) == 0) {
           60                 if(scale > 1) {
           61                         tmp2 = smprint("%d*%s", scale, t);
           62                         free(t);
           63                         t = tmp2;
           64                 }
           65                 return t;
           66         }
           67 
           68         return nil;
           69 }