diff -r fb07a0ab9a17 -r 6814aea8462d ucx/buffer.h
--- a/ucx/buffer.h	Wed Oct 10 10:04:01 2012 +0200
+++ b/ucx/buffer.h	Wed Oct 10 10:46:20 2012 +0200
@@ -1,6 +1,7 @@
 #ifndef BUFFER_H
 #define	BUFFER_H
 
+#include <sys/types.h>
 #include <stdio.h>
 
 #ifdef	__cplusplus
@@ -18,6 +19,16 @@
 void ucx_buffer_free(UcxBuffer* buffer);
 
 /*
+ * the autofree flag is enforced for the new buffer
+ * if length is zero, the whole remaining buffer shall be extracted
+ * the position of the new buffer is set to zero
+ */
+UcxBuffer *ucx_buffer_extract(UcxBuffer *src,
+        size_t start, size_t length, int flags);
+#define ucx_buffer_clone(src,flags) \
+    ucx_buffer_extract(src, 0, 0, flags)
+
+/*
  * Moves the position of the buffer to a new position relative to whence.
  *
  * SEEK_SET marks the start of the buffer
@@ -31,6 +42,9 @@
  */
 int ucx_buffer_seek(UcxBuffer *buffer, off_t offset, int whence);
 size_t ucx_buffer_tell(UcxBuffer *buffer);
+size_t ucx_buffer_size(UcxBuffer *buffer);
+/* returns non-zero, if at least the specified flags are set */
+int ucx_buffer_testflags(UcxBuffer *buffer, int flags);
 
 /*
  * returns non-zero, iff the current buffer position has exceeded the last