1 files changed, 20 insertions, 0 deletions
diff --git a/apt-pkg/contrib/hashsum_template.h b/apt-pkg/contrib/hashsum_template.h
index 7667baf92..2847f3308 100644
--- a/apt-pkg/contrib/hashsum_template.h
+++ b/apt-pkg/contrib/hashsum_template.h
@@ -84,4 +84,24 @@ class HashSumValue
    }
 };
 
+class SummationImplementation
+{
+   public:
+   virtual bool Add(const unsigned char *inbuf, unsigned long inlen) = 0;
+   inline bool Add(const char *inbuf, unsigned long const inlen)
+   { return Add((unsigned char *)inbuf, inlen); };
+
+   inline bool Add(const unsigned char *Data)
+   { return Add(Data, strlen((const char *)Data)); };
+   inline bool Add(const char *Data)
+   { return Add((const unsigned char *)Data, strlen((const char *)Data)); };
+
+   inline bool Add(const unsigned char *Beg, const unsigned char *End)
+   { return Add(Beg, End - Beg); };
+   inline bool Add(const char *Beg, const char *End)
+   { return Add((const unsigned char *)Beg, End - Beg); };
+
+   bool AddFD(int Fd, unsigned long Size);
+};
+
 #endif