added declaration and initialization of sections

[libucw.git] / lib / fastbuf.c

diff --git a/lib/fastbuf.c b/lib/fastbuf.c
index 0929f101a9c8a959bda89abe1c892711fe643051..f83b40210132db4a87258d9d77f9078f0465b6bd 100644 (file)
--- a/lib/fastbuf.c
+++ b/lib/fastbuf.c
@@ -1,7 +1,7 @@
 /*
- *     Sherlock Library -- Fast Buffered I/O
+ *     UCW Library -- Fast Buffered I/O
  *
- *     (c) 1997--2000 Martin Mares <mj@ucw.cz>
+ *     (c) 1997--2005 Martin Mares <mj@ucw.cz>
  *
  *     This software may be freely distributed and used according to the terms
  *     of the GNU Lesser General Public License.
@@ -335,3 +335,38 @@ bconfig(struct fastbuf *f, uns item, int value)
 {
   return f->config ? f->config(f, item, value) : -1;
 }
+
+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;
+}