the begginning

writeengine/bulk/we_colbufsec.cpp

@@ -0,0 +1,87 @@
+/* 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_colbufsec.cpp 4450 2013-01-21 14:13:24Z rdempsey $
+ *
+ ****************************************************************************/
+
+/** @file
+ * Implementation of the ColumnBufferSection class
+ */
+
+#include "we_colbufsec.h"
+
+namespace WriteEngine {
+
+ColumnBufferSection::ColumnBufferSection(
+    ColumnBuffer * const cb,
+    RID sRowId,
+    RID eRowId,
+    int width,
+    int sOffset)
+        :fCBuf(cb),
+        fStartRowId(sRowId),
+        fEndRowId(eRowId),
+        fColWidth(width),
+        fBufStartOffset(sOffset),
+        fCurrRowId(sRowId),
+        fStatus(INIT_COMPLETE) {
+} 
+
+ColumnBufferSection::~ColumnBufferSection() {
+}
+
+void ColumnBufferSection::write(const void * const data, int nRows) {
+//Casting void * to unsigned char * without modifying the constness
+    const unsigned char * const tData =
+        static_cast<const unsigned char * const>(data);
+
+    if(fCurrRowId + nRows + 1> fEndRowId) {
+    //TODO: Handle error (old-dmc)
+    }
+
+    int startOffset = (fBufStartOffset + (fCurrRowId-fStartRowId) *
+                      fColWidth) % fCBuf->getSize();
+    int nBytes = nRows * fColWidth;
+    int bytesWritten = 0;
+    if((startOffset + nBytes) > fCBuf->getSize()) {
+        fCBuf->write(tData, startOffset, fCBuf->getSize() - startOffset);
+        bytesWritten = fCBuf->getSize() - startOffset;
+        startOffset = 0;
+    }
+    fCBuf->write(tData + bytesWritten, startOffset, nBytes - bytesWritten);
+    fCurrRowId += nRows;
+}
+    
+void ColumnBufferSection::setStatus(int s) {
+    fStatus = s;
+}
+
+int ColumnBufferSection::getStatus() const {
+    return fStatus;
+}
+
+int ColumnBufferSection::getStartOffset() const {
+    return fBufStartOffset;
+}
+
+int ColumnBufferSection::getSectionSize() const {
+    return (fEndRowId - fStartRowId + 1) * fColWidth;
+}
+
+}