Myriad is getting pretty close, just have to finish the writing code and

probably tweak the header init.

1 files changed, 56 insertions, 13 deletions

diff --git a/src/myriad.cpp b/src/myriad.cpp
index d3914df..a1a5c38 100644
--- a/src/myriad.cpp
+++ b/src/myriad.cpp
@@ -77,14 +77,18 @@ void Bu::Myriad::initialize()
         iBlocks = iSize/iBlockSize;
         sio << "Myriad: iSize=" << iSize << ", iBlockSize=" << iBlockSize
                 << ", iBlocks=" << iBlocks << ", iStreams=" << iStreams << sio.nl;
-        
+
+        // Don't do this, just read the damn header.
+        sio << "Myriad:  Don't do this, just read the damn header (line 82)"
+                << sio.nl;
+
         int iHeaderSize = 14 + 8 + 4;
-        int iHeaderBlocks = blkDiv( iHeaderSize+4, iBlockSize );
+        int iHeaderBlocks = 0; //blkDiv( iHeaderSize+4, iBlockSize );
 
         while( iHeaderSize > iHeaderBlocks*iBlockSize )
         {
-                iHeaderSize = 14 + 8 + 4*iHeaderBlocks;
                 iHeaderBlocks = blkDiv( iHeaderSize+4, iBlockSize );
+                iHeaderSize = 14 + 8 + 4*iHeaderBlocks;
         }
 
         sio << "Myriad: iHeaderSize=" << iHeaderSize
@@ -102,7 +106,8 @@ void Bu::Myriad::initialize()
                 sStore.read( &s.iId, 4 );
                 sStore.read( &s.iSize, 4 );
                 int iSBlocks = blkDiv(s.iSize, iBlockSize);
-                sio << "Myriad: - Stream::iId=" << s.iId << ", Stream::iSize=" << s.iSize
+                sio << "Myriad: - Stream::iId=" << s.iId
+                        << ", Stream::iSize=" << s.iSize
                         << ", Stream::aBlocks=" << iSBlocks
                         << ", sStore.tell()=" << sStore.tell() << sio.nl;
                 for( int k = 0; k < iSBlocks; k++ )
@@ -133,7 +138,7 @@ void Bu::Myriad::initialize()
                 }
         }
 
-        sio << bsBlockUsed.toString() << sio.nl;
+        sio << "Myriad: Blocks used: " << bsBlockUsed.toString() << sio.nl;
 
         //printf("%d blocks, %db each, %db block offset\n",
         //      iBlocks, iBlockSize, iBlockStart );
@@ -143,7 +148,7 @@ void Bu::Myriad::initialize()
 void Bu::Myriad::initialize( int iBlockSize, int iPreAllocate )
 {
         int iHeaderSize = 14 + 8 + 4;
-        int iHeaderBlocks = blkDiv( iHeaderSize+4, iBlockSize );
+        int iHeaderBlocks = 0; //blkDiv( iHeaderSize+4, iBlockSize );
         char cBuf = 1;
         int iBuf = 0;
         
@@ -152,13 +157,13 @@ void Bu::Myriad::initialize( int iBlockSize, int iPreAllocate )
 
         while( iHeaderSize > iHeaderBlocks*iBlockSize )
         {
-                iHeaderSize = 14 + 8 + 4*iHeaderBlocks;
                 iHeaderBlocks = blkDiv( iHeaderSize+4, iBlockSize );
+                iHeaderSize = 14 + 8 + 4*iHeaderBlocks;
         }
 
         iPreAllocate += iHeaderBlocks;
 
-        sio << "Myriad:  iHeaderSize=" << iHeaderSize << ", iBlockSize="
+        sio << "Myriad: iHeaderSize=" << iHeaderSize << ", iBlockSize="
                 << iBlockSize << ", iHeaderBlocks=" << iHeaderBlocks << sio.nl;
         
         bsBlockUsed.setSize( iPreAllocate, true );
@@ -204,6 +209,7 @@ void Bu::Myriad::initialize( int iBlockSize, int iPreAllocate )
         this->iBlocks = iPreAllocate;
         
         pStr->iSize = sStore.tell();
+        sio << "Myriad: Actual end of header stream = " << pStr->iSize << sio.nl;
 
         //hStreams.insert( 0, BlockArray( 0 ) );
 }
@@ -229,9 +235,9 @@ int Bu::Myriad::createStream( int iPreAllocate )
         for( int j = 0; j < iPreAllocate; j++ )
         {
                 int iFreeBlock = findEmptyBlock();
-                sio << "Myriad: Adding block " << j << sio.nl;
-                pStr->aBlocks.append( j );
-                bsBlockUsed.setBit( j );
+                sio << "Myriad: Adding block " << iFreeBlock << sio.nl;
+                pStr->aBlocks.append( iFreeBlock );
+                bsBlockUsed.setBit( iFreeBlock );
         }
 
         return 0;
@@ -261,9 +267,9 @@ void Bu::Myriad::deleteStream( int /*iID*/ )
 {
 }
 
-Bu::MyriadStream Bu::Myriad::openStream( int iID )
+Bu::MyriadStream Bu::Myriad::openStream( int iId )
 {
-        return MyriadStream( *this, iID );
+        return MyriadStream( *this, findStream( iId ) );
 }
 
 int Bu::Myriad::getBlockSize()
@@ -281,4 +287,41 @@ int Bu::Myriad::getNumUsedBlocks()
         return iUsed;
 }
 
+Bu::Myriad::Stream *Bu::Myriad::findStream( int iId )
+{
+        for( StreamArray::iterator i = aStreams.begin(); i; i++ )
+        {
+                if( (*i)->iId == iId )
+                        return *i;
+        }
+
+        return NULL;
+}
+
+Bu::Myriad::Block *Bu::Myriad::getBlock( int iBlock )
+{
+        sio << "Myriad:  Reading block " << iBlock << ", bytes "
+                << iBlockSize*iBlock << "-" << iBlockSize*(iBlock+1) << sio.nl;
+        Block *pBlock = new Block;
+        pBlock->pData = new char[iBlockSize];
+        sStore.setPos( iBlockSize * iBlock );
+        sStore.read( pBlock->pData, iBlockSize );
+        pBlock->bChanged = false;
+        pBlock->iBlockIndex = iBlock;
+
+        return pBlock;
+}
+
+void Bu::Myriad::releaseBlock( Bu::Myriad::Block *pBlock )
+{
+        sio << "Myriad:  Releasing block " << pBlock->iBlockIndex << sio.nl;
+        if( pBlock->bChanged )
+        {
+                sio << "Myriad:    - Block changed, writing back to stream." << sio.nl;
+                sStore.setPos( iBlockSize * pBlock->iBlockIndex );
+                sStore.write( pBlock->pData, iBlockSize );
+        }
+        delete[] pBlock->pData;
+        delete pBlock;
+}