More tweaks and informational functions.

1 files changed, 89 insertions, 0 deletions

diff --git a/src/myriad.cpp b/src/myriad.cpp
index 2f5c14f..9d7a849 100644
--- a/src/myriad.cpp
+++ b/src/myriad.cpp
@@ -151,6 +151,7 @@ void Bu::Myriad::initialize()
         //                      << ", pIn->tell()=" << pIn->tell() << sio.nl;
                         s.aBlocks.append( iBId );
                         bsBlockUsed.setBit( iBId );
+                        iUsed++;
                         if( (j == 0 && k == iHeaderBlocks-1) )
                         {
         //                      sio << "Myriad:   - End of prepartition, unlocking skipping."
@@ -172,6 +173,13 @@ void Bu::Myriad::initialize()
 
 void Bu::Myriad::initialize( int iBlockSize, int iPreAllocate )
 {
+        for( StreamArray::iterator i = aStreams.begin(); i; i++ )
+        {
+                delete *i;
+        }
+        aStreams.clear();
+        iUsed = 0;
+
         int iHeaderSize = 14 + 8 + 4;
         int iHeaderBlocks = 0; //blkDiv( iHeaderSize+4, iBlockSize );
         char cBuf = 1;
@@ -192,6 +200,7 @@ void Bu::Myriad::initialize( int iBlockSize, int iPreAllocate )
         //      << iBlockSize << ", iHeaderBlocks=" << iHeaderBlocks << sio.nl;
         
         bsBlockUsed.setSize( iPreAllocate, true );
+        iUsed++;
 
         char *pBlock = new char[iBlockSize];
         memset( pBlock, 0, iBlockSize );
@@ -240,6 +249,7 @@ void Bu::Myriad::initialize( int iBlockSize, int iPreAllocate )
         {
                 pStr->aBlocks.append( j );
                 bsBlockUsed.setBit( j );
+                iUsed++;
         }
 
         aStreams.append( pStr );
@@ -283,6 +293,7 @@ void Bu::Myriad::updateHeader()
 //                      << " to header." << sio.nl;
                 aStreams[0]->aBlocks.append( iBlock );
                 bsBlockUsed.setBit( iBlock );
+                iUsed++;
                 iHeaderSize += 4;
                 iNewBlocks = blkDiv( iHeaderSize, iBlockSize );
         }
@@ -339,6 +350,7 @@ int Bu::Myriad::createStream( int iPreAllocate )
 //              sio << "Myriad: Adding block " << iFreeBlock << sio.nl;
                 pStr->aBlocks.append( iFreeBlock );
                 bsBlockUsed.setBit( iFreeBlock );
+                iUsed++;
         }
 
         bHeaderChanged = true;
@@ -346,6 +358,52 @@ int Bu::Myriad::createStream( int iPreAllocate )
         return pStr->iId;
 }
 
+int Bu::Myriad::createStreamWithId( int iId, int iPreAllocate )
+{
+        try
+        {
+                findStream( iId );
+                throw MyriadException( MyriadException::streamExists,
+                        "There is already a stream with the given id.");
+        }
+        catch( MyriadException &e )
+        {
+                Stream *pStr = new Stream();
+                pStr->iId = iId;
+                //sio << "Myriad: New stream id=" << pStr->iId << ", iPreAllocate="
+                //      << iPreAllocate << sio.nl;
+                pStr->iSize = 0;
+                if( aStreams.last()->iId < iId )
+                {
+                        aStreams.append( pStr );
+                }
+                else
+                {
+                        for( StreamArray::iterator i = aStreams.begin(); i; i++ )
+                        {
+                                if( (*i)->iId > iId )
+                                {
+                                        aStreams.insert( i, pStr );
+                                        break;
+                                }
+                        }
+                }
+
+                for( int j = 0; j < iPreAllocate; j++ )
+                {
+                        int iFreeBlock = findEmptyBlock();
+        //              sio << "Myriad: Adding block " << iFreeBlock << sio.nl;
+                        pStr->aBlocks.append( iFreeBlock );
+                        bsBlockUsed.setBit( iFreeBlock );
+                        iUsed++;
+                }
+
+                bHeaderChanged = true;
+
+                return pStr->iId;
+        }
+}
+
 int Bu::Myriad::findEmptyBlock()
 {
         bHeaderChanged = true;
@@ -374,6 +432,12 @@ int Bu::Myriad::findEmptyBlock()
 
 void Bu::Myriad::deleteStream( int iId )
 {
+        if( iId < 0 )
+                throw MyriadException( MyriadException::invalidStreamId,
+                                "Invalid stream id.");
+        if( iId == 0 )
+                throw MyriadException( MyriadException::protectedStream,
+                                "You cannot delete stream zero, it is protected.");
         for( StreamArray::iterator i = aStreams.begin(); i; i++ )
         {
                 if( (*i)->iId == iId )
@@ -382,6 +446,7 @@ void Bu::Myriad::deleteStream( int iId )
                         for( BlockArray::iterator j = pStream->aBlocks.begin(); j; j++ )
                         {
                                 bsBlockUsed.setBit( *j, false );
+                                iUsed--;
                         }
                         aStreams.erase( i );
                         bHeaderChanged = true;
@@ -391,12 +456,33 @@ void Bu::Myriad::deleteStream( int iId )
         }
 }
 
+Bu::Array<int> Bu::Myriad::getStreamIds()
+{
+        Bu::Array<int> aRet( aStreams.getSize() );
+        for( StreamArray::iterator i = aStreams.begin(); i; i++ )
+        {
+                aRet.append( (*i)->iId );
+        }
+
+        return aRet;
+}
+
+int Bu::Myriad::getStreamSize( int iId )
+{
+        return findStream( iId )->iSize;
+}
+
 Bu::MyriadStream Bu::Myriad::openStream( int iId )
 {
         //sio << "Myriad:  Request to open stream: " << iId << sio.nl;
         return MyriadStream( *this, findStream( iId ) );
 }
 
+int Bu::Myriad::getNumStreams()
+{
+        return aStreams.getSize();
+}
+
 int Bu::Myriad::getBlockSize()
 {
         return iBlockSize;
@@ -469,6 +555,7 @@ int Bu::Myriad::streamAddBlock( Stream *pStream )
         int iBlock = findEmptyBlock();
         pStream->aBlocks.append( iBlock );
         bsBlockUsed.setBit( iBlock );
+        iUsed++;
         return iBlock;
 }
 
@@ -484,6 +571,8 @@ void Bu::Myriad::setStreamSize( Stream *pStream, long iSize )
                 for( int iNewSize = pStream->aBlocks.getSize()*iBlockSize;
                          iNewSize-64 > iSize; iNewSize -= iBlockSize )
                 {
+                        if( bsBlockUsed.getBit( pStream->aBlocks.last() ) )
+                                iUsed--;
                         bsBlockUsed.setBit( pStream->aBlocks.last(), false );
                         pStream->aBlocks.eraseLast();
                 }