1 files changed, 144 insertions, 0 deletions
diff --git a/storage/oqgraph/graphcore.h b/storage/oqgraph/graphcore.h
new file mode 100644
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+++ b/storage/oqgraph/graphcore.h
@@ -0,0 +1,144 @@
+/* Copyright (C) 2007-2013 Arjen G Lentz & Antony T Curtis for Open Query
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+/* ======================================================================
+   Open Query Graph Computation Engine, based on a concept by Arjen Lentz
+   v3 implementation by Antony Curtis, Arjen Lentz, Andrew McDonnell
+   For more information, documentation, support, enhancement engineering,
+   see http://openquery.com/graph or contact graph@openquery.com
+   ======================================================================
+*/
+
+#ifndef oq_graphcore_h_
+#define oq_graphcore_h_
+
+/* #define GRAPHCORE_INTERNAL __attribute__((visibility("hidden"))) */
+#define GRAPHCORE_INTERNAL
+
+#include "graphcore-types.h"
+
+namespace open_query
+{
+  class oqgraph_share;
+  class oqgraph_cursor;
+
+  struct row
+  {
+    bool latch_indicator;
+    bool orig_indicator;
+    bool dest_indicator;
+    bool weight_indicator;
+    bool seq_indicator;
+    bool link_indicator;
+
+    int latch;
+    const char* latchStringValue; // workaround for when latch is a Varchar
+    int latchStringValueLen;
+    VertexID orig;
+    VertexID dest;
+    EdgeWeight weight;
+    unsigned seq;
+    VertexID link;
+  };
+
+  class oqgraph
+  {
+    oqgraph_share *const share;
+    oqgraph_cursor *cursor;
+    row row_info;
+
+    inline oqgraph(oqgraph_share*) throw();
+    inline ~oqgraph() throw();
+  public:
+
+    // Integer operation flags
+    enum {
+      NO_SEARCH = 0,
+      DIJKSTRAS = 1,
+      BREADTH_FIRST = 2,
+      NUM_SEARCH_OP = 3,
+      LEAVES = 4,
+
+      ALGORITHM = 0x0ffff,
+      HAVE_ORIG = 0x10000,
+      HAVE_DEST = 0x20000,
+      };
+
+    enum error_code
+    {
+      OK= 0,
+      NO_MORE_DATA,
+      EDGE_NOT_FOUND,
+      INVALID_WEIGHT,
+      DUPLICATE_EDGE,
+      CANNOT_ADD_VERTEX,
+      CANNOT_ADD_EDGE,
+      MISC_FAIL
+    };
+
+    struct current_row_st {};
+    static inline current_row_st current_row()
+    { return current_row_st(); }
+
+    unsigned vertices_count() const throw();
+    unsigned edges_count() const throw();
+
+    int delete_all(void) throw();
+
+    int insert_edge(VertexID, VertexID, EdgeWeight, bool=0) throw();
+    int modify_edge(VertexID, VertexID, EdgeWeight) throw();
+    int delete_edge(VertexID, VertexID) throw();
+
+    int modify_edge(current_row_st,
+                    VertexID*, VertexID*, EdgeWeight*, bool=0) throw();
+    int delete_edge(current_row_st) throw();
+
+    int replace_edge(VertexID orig, VertexID dest, EdgeWeight weight) throw()
+    { return insert_edge(orig, dest, weight, true); }
+
+    // Update the retained latch string value, for later retrieval by
+    // fetch_row() as a workaround for making sure we return the correct
+    // string to match the latch='' clause
+    // (This is a hack for mariadb mysql compatibility)
+    // IT SHOULD ONLY BE CALLED IMMEIDATELY BEFORE search)(
+    void retainLatchFieldValue(const char *retainedLatch);
+
+    int search(int*, VertexID*, VertexID*) throw();
+    int random(bool) throw();
+
+    int fetch_row(row&) throw();
+    int fetch_row(row&, const void*) throw();
+    void row_ref(void*) throw();
+    void init_row_ref(void*) throw();
+
+    static oqgraph* create(oqgraph_share*) throw();
+    static oqgraph_share *create(TABLE*,Field*,Field*,Field*) throw();
+
+    THD* get_thd();
+    void set_thd(THD*);
+
+    static void free(oqgraph*) throw();
+    static void free(oqgraph_share*) throw();
+
+    void release_cursor() throw();
+
+    static const size_t sizeof_ref;
+  private:    
+    char *lastRetainedLatch;
+  };
+
+}
+#endif