sys/src/libdraw/openfont.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <draw.h>
   4
   5 static char*
   6 readfile(char *name)
   7 {
   8         enum { HUNK = 8*1024, };
   9         int f, n, r;
  10         char *s, *p;
  11
  12         n = 0;
  13         r = -1;
  14         if((s = malloc(HUNK)) != nil){
  15                 if((f = open(name, OREAD|OCEXEC)) >= 0){
  16                         while((r = read(f, s+n, HUNK)) > 0){
  17                                 n += r;
  18                                 r = -1;
  19                                 if((p = realloc(s, n+HUNK)) == nil)
  20                                         break;
  21                                 s = p;
  22                         }
  23                         close(f);
  24                 }
  25         }
  26         if(r < 0 || (p = realloc(s, n+1)) == nil){
  27                 free(s);
  28                 return nil;
  29         }
  30         p[n] = 0;
  31         return p;
  32 }
  33
  34 Font*
  35 openfont(Display *d, char *name)
  36 {
  37         Font *fnt;
  38         char *buf;
  39
  40         if((buf = readfile(name)) == nil){
  41                 werrstr("openfont: %r");
  42                 return nil;
  43         }
  44         fnt = buildfont(d, buf, name);
  45         free(buf);
  46         return fnt;
  47 }