void init (char const * filename, bool overwrite, size32_t _keyedsize, size32_t _rowsize, bool variableWidth, bool quickCompressed, unsigned nodeSize)
{
keyedsize = _keyedsize;
rowsize = _rowsize;
reccount = 0;
keyFile.setown(createIFile(filename));
if(!overwrite && (keyFile->isFile() != notFound))
throw MakeStringException(0, "Found preexisting index file %s (overwrite not selected)", filename);
keyFileIO.setown(keyFile->openShared(IFOcreate, IFSHfull)); // not sure if needs shared here
if(!keyFileIO)
throw MakeStringException(0, "Could not write index file %s", filename);
keyStream.setown(createIOStream(keyFileIO));
unsigned flags = COL_PREFIX | HTREE_FULLSORT_KEY | HTREE_COMPRESSED_KEY;
if(variableWidth)
flags |= HTREE_VARSIZE;
if(quickCompressed)
flags |= HTREE_QUICK_COMPRESSED_KEY;
keyBuilder.setown(createKeyBuilder(keyStream, flags, rowsize, nodeSize, keyedsize, 0)); // MORE - support for sequence other than 0...
}
void open(IPartDescriptor &partDesc, bool isTopLevel, bool isVariable)
{
StringBuffer partFname;
getPartFilename(partDesc, 0, partFname);
bool compress=false;
OwnedIFileIO iFileIO = createMultipleWrite(this, partDesc, 0, TW_RenameToPrimary, compress, NULL, this, &abortSoon);
Owned<IFileIOStream> out = createBufferedIOStream(iFileIO);
ActPrintLog("INDEXWRITE: created fixed output stream %s", partFname.str());
unsigned flags = COL_PREFIX;
if (TIWrowcompress & helper->getFlags())
flags |= HTREE_COMPRESSED_KEY|HTREE_QUICK_COMPRESSED_KEY;
else if (!(TIWnolzwcompress & helper->getFlags()))
flags |= HTREE_COMPRESSED_KEY;
if (!isLocal)
flags |= HTREE_FULLSORT_KEY;
if (isVariable)
flags |= HTREE_VARSIZE;
buildUserMetadata(metadata);
buildLayoutMetadata(metadata);
unsigned nodeSize = metadata ? metadata->getPropInt("_nodeSize", NODESIZE) : NODESIZE;
builder.setown(createKeyBuilder(out, flags, maxDiskRecordSize, nodeSize, helper->getKeyedSize(), isTopLevel ? 0 : totalCount));
}
