the begginning

writeengine/shared/we_blockop.h

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+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   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.
+
+   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 02110-1301, USA. */
+
+/*******************************************************************************
+* $Id: we_blockop.h 4450 2013-01-21 14:13:24Z rdempsey $
+*
+*******************************************************************************/
+/** @file */
+
+#ifndef _WE_BLOCKOP_H_
+#define _WE_BLOCKOP_H_
+
+#include <we_obj.h>
+
+#if defined(_MSC_VER) && defined(WRITEENGINE_DLLEXPORT)
+#define EXPORT __declspec(dllexport)
+#else
+#define EXPORT
+#endif
+
+/** Namespace WriteEngine */
+namespace WriteEngine
+{
+
+/** Class BlockOp */
+class BlockOp : public WEObj
+{
+public:
+   /**
+    * @brief Constructor
+    */
+    EXPORT BlockOp();
+
+   /**
+    * @brief Default Destructor
+    */
+    EXPORT ~BlockOp();
+ 
+
+   /**
+    * @brief Calculate the location of Row ID
+    */
+    EXPORT bool     calculateRowId( RID rowId,
+                                    const int epb,
+                                    const int width,
+                                    int&  fbo,
+                                    int&  bio ) const;
+
+   /**
+    * @brief Calculate the location of Row ID
+    */
+    void            clearBlock(     DataBlock* block )
+                    { memset(block->data, 0, sizeof(block->data));
+                      block->no = -1;
+                      block->dirty = false; }
+
+   /**
+    * @brief Get bit value after shift
+    */
+    uint64_t        getBitValue(    uint64_t val,
+                                    int shiftBit,
+                                    uint64_t mask ) const
+                    { return ( val >> shiftBit ) & mask ; }
+
+   /**
+    * @brief Get correct row width
+    */
+    EXPORT int      getCorrectRowWidth( const execplan::CalpontSystemCatalog::ColDataType colDataType,
+                                    const int width ) const;
+
+   /**
+    * @brief Get an empty row value
+    */
+    EXPORT uint64_t getEmptyRowValue(const execplan::CalpontSystemCatalog::ColDataType colDataType,
+                                    const int width ) const;
+
+   /**
+    * @brief Calculate row id
+    */
+    EXPORT RID      getRowId(       const long fbo,
+                                    const int width,
+                                    const int rowPos ) const;
+
+   /**
+    * @brief Get buffer value
+    */
+    EXPORT void     readBufValue(   const unsigned char* buf,
+                                    void* val, const short width ) const;
+
+   /**
+    * @brief Reset a buffer
+    */
+    EXPORT void     resetBuf(       unsigned char* buf,
+                                    const int bufSize ) const;
+
+   /**
+    * @brief Fill buffer with empty values
+    */
+    EXPORT void static setEmptyBuf( unsigned char* buf,
+                                    const int bufSize,
+                                    uint64_t emptyVal, const int width );
+
+   /**
+    * @brief Set a value in a buffer
+    */
+    EXPORT void     writeBufValue(  unsigned char* buf,
+                                    void* val,
+                                    const size_t width,
+                                    const bool clear = false ) const;
+};
+
+} //end of namespace
+
+#undef EXPORT
+
+#endif // _WE_BLOCKOP_H_