+
+void
+brewind(struct fastbuf *f)
+{
+ bflush(f);
+ bsetpos(f, 0);
+}
+
+int
+bskip_slow(struct fastbuf *f, uns len)
+{
+ while (len)
+ {
+ byte *buf;
+ uns l = bdirect_read_prepare(f, &buf);
+ if (!l)
+ return 0;
+ l = MIN(l, len);
+ bdirect_read_commit(f, buf+l);
+ len -= l;
+ }
+ return 1;
+}
+
+sh_off_t
+bfilesize(struct fastbuf *f)
+{
+ if (!f)
+ return 0;
+ sh_off_t pos = btell(f);
+ bseek(f, 0, SEEK_END);
+ sh_off_t len = btell(f);
+ bsetpos(f, pos);
+ return len;
+}