X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Fctf%2Ftypes.h;h=fad578ff267d3f88b2a966b9c60f6aeacb334c21;hp=84548527eb0400a4d603673dcd49f97876e3aa07;hb=70fd5a515016525961d4bef0d627616abdc9bc28;hpb=0ace7505e59ef4fd014ba800e22767d0b58261e9

diff --git a/include/babeltrace/ctf/types.h b/include/babeltrace/ctf/types.h
index 84548527..fad578ff 100644
--- a/include/babeltrace/ctf/types.h
+++ b/include/babeltrace/ctf/types.h
@@ -129,28 +129,41 @@ int ctf_fini_pos(struct ctf_stream_pos *pos);
 /*
  * move_pos - move position of a relative bit offset
  *
+ * Return 1 if OK, 0 if out-of-bound.
+ *
  * TODO: allow larger files by updating base too.
  */
 static inline
-void ctf_move_pos(struct ctf_stream_pos *pos, uint64_t bit_offset)
+int ctf_move_pos(struct ctf_stream_pos *pos, uint64_t bit_offset)
 {
+	uint64_t max_len;
+
 	printf_debug("ctf_move_pos test EOF: %" PRId64 "\n", pos->offset);
 	if (unlikely(pos->offset == EOF))
-		return;
+		return 0;
+	if (pos->flags & PROT_READ)
+		max_len = pos->content_size;
+	else
+		max_len = pos->packet_size;
+	if (unlikely(pos->offset + bit_offset > max_len))
+		return 0;
 
 	pos->offset += bit_offset;
 	printf_debug("ctf_move_pos after increment: %" PRId64 "\n", pos->offset);
+	return 1;
 }
 
 /*
  * align_pos - align position on a bit offset (> 0)
  *
+ * Return 1 if OK, 0 if out-of-bound.
+ *
  * TODO: allow larger files by updating base too.
  */
 static inline
-void ctf_align_pos(struct ctf_stream_pos *pos, uint64_t bit_offset)
+int ctf_align_pos(struct ctf_stream_pos *pos, uint64_t bit_offset)
 {
-	ctf_move_pos(pos, offset_align(pos->offset, bit_offset));
+	return ctf_move_pos(pos, offset_align(pos->offset, bit_offset));
 }
 
 static inline
@@ -191,9 +204,15 @@ void ctf_pos_pad_packet(struct ctf_stream_pos *pos)
 static inline
 int ctf_pos_access_ok(struct ctf_stream_pos *pos, uint64_t bit_len)
 {
+	uint64_t max_len;
+
 	if (unlikely(pos->offset == EOF))
 		return 0;
-	if (unlikely(pos->offset + bit_len > pos->packet_size))
+	if (pos->flags & PROT_READ)
+		max_len = pos->content_size;
+	else
+		max_len = pos->packet_size;
+	if (unlikely(pos->offset + bit_len > max_len))
 		return 0;
 	return 1;
 }