Added the Bu::ListHash class, it's a really simple wrapper for Bu::Hash that

puts all of the values in a Bu::List assosiated with the key.  When you insert,
it will append to the list at that key, and create a list if it needs to.

When erasing, getting, etc, you operate on the whole list, not just one element.

2 files changed, 47 insertions, 0 deletions

diff --git a/src/listhash.cpp b/src/listhash.cpp
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/listhash.cpp
diff --git a/src/listhash.h b/src/listhash.h
new file mode 100644
index 0000000..73aa3f8
--- /dev/null
+++ b/src/listhash.h
@@ -0,0 +1,47 @@
+#ifndef BU_LIST_HASH_H
+#define BU_LIST_HASH_H
+
+#include "bu/hash.h"
+#include "bu/list.h"
+
+namespace Bu
+{
+        template<typename key, typename value, typename sizecalc = __calcNextTSize_fast, typename keyalloc = std::allocator<key>, typename valuealloc = std::allocator<Bu::List<value> >, typename challoc = std::allocator<uint32_t> >
+        class ListHash : public Hash<key, Bu::List<value>, sizecalc, keyalloc, valuealloc, challoc>
+        {
+                typedef Hash<key, Bu::List<value>, sizecalc, keyalloc, valuealloc, challoc> ParentType;
+        public:
+                ListHash()
+                {
+                }
+
+                ListHash( const ListHash &src ) :
+                        ParentType( src )
+                {
+                }
+
+                virtual ~ListHash()
+                {
+                }
+
+                ListHash &operator=( const ListHash &src )
+                {
+                        *dynamic_cast<ParentType *>(this) =
+                                dynamic_cast<ParentType &>(src);
+                }
+
+                virtual void insert( const key &k, const value &v )
+                {
+                        if( !has( k ) )
+                        {
+                                ParentType::insert( k, List<value>() );
+                        }
+                        get( k ).append( v );
+                }
+                
+        private:
+        };
+
+};
+
+#endif