Added BytesNeeded() functions to all the sniffer classes to allow

a pre-read data stream to be sniffed instead of actual files on disk.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1149 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/storage/sniffer/DisjList.h

@@ -9,6 +9,8 @@
 #ifndef _SNIFFER_DISJ_LIST_H
 #define _SNIFFER_DISJ_LIST_H
 
+#include <sys/types.h>
+
 class BPositionIO;
 
 namespace BPrivate {
@@ -20,7 +22,9 @@ class DisjList {
 public:
 	DisjList();
 	virtual ~DisjList();
+
 	virtual bool Sniff(BPositionIO *data) const = 0;
+	virtual ssize_t BytesNeeded() const = 0;
 	
 	void SetCaseInsensitive(bool how);
 	bool IsCaseInsensitive();