2 files changed, 140 insertions, 60 deletions

diff --git a/src/unstable/blob.cpp b/src/unstable/blob.cpp
index f8cf1b0..3f7d9d9 100644
--- a/src/unstable/blob.cpp
+++ b/src/unstable/blob.cpp
@@ -34,14 +34,48 @@ Bu::Blob::Blob( const char *pSrc ) :
     memcpy( pData, pSrc, iSize+1 );
 }
 
-Bu::Blob::Blob( const void *pSrc, int32_t iSize )
+Bu::Blob::Blob( const void *pSrc, int32_t iSize ) :
+    pData( 0 ),
+    iSize( iSize )
 {
-    this->iSize = iSize;
     pData = new char[iSize+1];
     memcpy( pData, pSrc, iSize );
     pData[iSize] = '\0';
 }
 
+Bu::Blob::Blob( const Bu::Blob::const_iterator &iStart ) :
+    pData( 0 ),
+    iSize( -1 )
+{
+    if( !iStart )
+        return;
+
+    iSize = iStart.pBlob->iSize - iStart.iIndex;
+    pData = new char[iSize+1];
+    memcpy( pData, iStart.pBlob->pData+iStart.iIndex, iSize );
+}
+
+Bu::Blob::Blob( const Bu::Blob::const_iterator &iStart,
+        const Bu::Blob::const_iterator &iEnd ) :
+    pData( 0 ),
+    iSize( -1 )
+{
+    if( !iStart )
+        return;
+
+    if( iEnd )
+    {
+        iSize = iEnd.iIndex - iStart.iIndex;
+    }
+    else
+    {
+        iSize = iStart.pBlob->iSize - iStart.iIndex;
+    }
+    
+    pData = new char[iSize+1];
+    memcpy( pData, iStart.pBlob->pData+iStart.iIndex, iSize );
+}
+
 Bu::Blob::~Blob()
 {
     delete[] pData;
@@ -316,6 +350,45 @@ bool Bu::Blob::operator>=( const char *pRhs ) const
     return true;
 }
 
+Bu::Blob::iterator Bu::Blob::begin()
+{
+    return iterator( this, true );
+}
+
+Bu::Blob::const_iterator Bu::Blob::begin() const
+{
+    return const_iterator( this, true );
+}
+
+Bu::Blob::iterator Bu::Blob::end()
+{
+    return iterator();
+}
+
+Bu::Blob::const_iterator Bu::Blob::end() const
+{
+    return const_iterator();
+}
+
+Bu::Blob::iterator Bu::Blob::rbegin()
+{
+    return iterator( this, false );
+}
+
+Bu::Blob::const_iterator Bu::Blob::rbegin() const
+{
+    return const_iterator( this, false );
+}
+
+Bu::Blob::iterator Bu::Blob::rend()
+{
+    return iterator();
+}
+
+Bu::Blob::const_iterator Bu::Blob::rend() const
+{
+    return const_iterator();
+}
 
 /////
 // Iterators
@@ -328,6 +401,13 @@ Bu::Blob::iterator::iterator( Bu::Blob *pBlob, bool bForward ) :
 {
 }
 
+Bu::Blob::iterator::iterator( Bu::Blob *pBlob, int32_t iIndex, bool bForward ) :
+    pBlob( pBlob ),
+    iIndex( iIndex ),
+    bForward( bForward )
+{
+}
+
 Bu::Blob::iterator::iterator() :
     pBlob( NULL ),
     iIndex( -1 ),
@@ -366,7 +446,7 @@ char &Bu::Blob::iterator::operator *()
     return pBlob->pData[iIndex];
 }
 
-Bu::Blob::iterator &Bu::Blob::iterator::operator++( int )
+Bu::Blob::iterator &Bu::Blob::iterator::operator++( int32_t )
 {
     if( bForward )
         ++iIndex;
@@ -386,7 +466,7 @@ Bu::Blob::iterator &Bu::Blob::iterator::operator++()
     return *this;
 }
 
-Bu::Blob::iterator &Bu::Blob::iterator::operator--( int )
+Bu::Blob::iterator &Bu::Blob::iterator::operator--( int32_t )
 {
     if( bForward )
         --iIndex;
@@ -406,6 +486,16 @@ Bu::Blob::iterator &Bu::Blob::iterator::operator--()
     return *this;
 }
 
+Bu::Blob::iterator Bu::Blob::iterator::operator+( int32_t iDelta ) const
+{
+    return iterator( pBlob, iIndex + iDelta, bForward );
+}
+
+Bu::Blob::iterator Bu::Blob::iterator::operator-( int32_t iDelta ) const
+{
+    return iterator( pBlob, iIndex - iDelta, bForward );
+}
+
 bool Bu::Blob::iterator::operator==( const Bu::Blob::iterator &rRhs )
 {
     if( isValid() == false && rRhs.isValid() == false )
@@ -454,6 +544,13 @@ Bu::Blob::const_iterator::const_iterator( const Blob *pBlob, bool bForward ) :
     bForward( bForward )
 {
 }
+Bu::Blob::const_iterator::const_iterator( const Blob *pBlob, int32_t iIndex,
+        bool bForward ) :
+    pBlob( pBlob ),
+    iIndex( iIndex ),
+    bForward( bForward )
+{
+}
 
 Bu::Blob::const_iterator::const_iterator() :
     pBlob( NULL ),
@@ -541,6 +638,18 @@ Bu::Blob::const_iterator &Bu::Blob::const_iterator::operator--()
     return *this;
 }
 
+Bu::Blob::const_iterator Bu::Blob::const_iterator::operator+( int32_t iDelta )
+    const
+{
+    return const_iterator( pBlob, iIndex + iDelta, bForward );
+}
+
+Bu::Blob::const_iterator Bu::Blob::const_iterator::operator-( int32_t iDelta )
+    const
+{
+    return const_iterator( pBlob, iIndex - iDelta, bForward );
+}
+
 bool Bu::Blob::const_iterator::operator==( const Bu::Blob::iterator &rRhs )
 {
     if( isValid() == false && rRhs.isValid() == false )
@@ -595,50 +704,10 @@ Bu::Blob::const_iterator &Bu::Blob::const_iterator::operator=(
     return *this;
 }
 
-
-Bu::Blob::iterator Bu::Blob::begin()
-{
-    return iterator( this, true );
-}
-
-Bu::Blob::const_iterator Bu::Blob::begin() const
-{
-    return const_iterator( this, true );
-}
-
-Bu::Blob::iterator Bu::Blob::end()
-{
-    return iterator();
-}
-
-Bu::Blob::const_iterator Bu::Blob::end() const
-{
-    return const_iterator();
-}
-
-Bu::Blob::iterator Bu::Blob::rbegin()
-{
-    return iterator( this, false );
-}
-
-Bu::Blob::const_iterator Bu::Blob::rbegin() const
-{
-    return const_iterator( this, false );
-}
-
-Bu::Blob::iterator Bu::Blob::rend()
-{
-    return iterator();
-}
-
-Bu::Blob::const_iterator Bu::Blob::rend() const
-{
-    return const_iterator();
-}
-
-////
+/////
 // Helper functions
 //
+
 template<> uint32_t Bu::__calcHashCode<Bu::Blob>( const Bu::Blob &k )
 {
     int32_t sz = k.getSize();
diff --git a/src/unstable/blob.h b/src/unstable/blob.h
index 6ce0c67..daee5f9 100644
--- a/src/unstable/blob.h
+++ b/src/unstable/blob.h
@@ -25,10 +25,16 @@ namespace Bu
     class Blob
     {
     public:
+        class iterator;
+        class const_iterator;
+
+    public:
         Blob();
         Blob( const Blob &rSrc );
         Blob( const char *pSrc );
         Blob( const void *pSrc, int32_t iSize );
+        Blob( const const_iterator &iStart );
+        Blob( const const_iterator &iStart, const const_iterator &iEnd );
         virtual ~Blob();
 
         int32_t getSize() const;
@@ -58,13 +64,22 @@ namespace Bu
         bool operator>=( const Blob &rRhs ) const;
         bool operator>=( const char *rRhs ) const;
 
-        class const_iterator;
+        iterator begin();
+        const_iterator begin() const;
+        iterator end();
+        const_iterator end() const;
+        iterator rbegin();
+        const_iterator rbegin() const;
+        iterator rend();
+        const_iterator rend() const;
+
         class iterator
         {
         friend class Blob;
         friend class const_iterator;
         private:
             iterator( Blob *pBlob, bool bForward );
+            iterator( Blob *pBlob, int32_t iIndex, bool bForward );
 
         public:
             iterator();
@@ -74,10 +89,12 @@ namespace Bu
             operator bool() const;
             char &operator *();
 
-            iterator &operator++( int );
+            iterator &operator++( int32_t );
             iterator &operator++();
-            iterator &operator--( int );
+            iterator &operator--( int32_t );
             iterator &operator--();
+            iterator operator+( int32_t iDelta ) const;
+            iterator operator-( int32_t iDelta ) const;
             bool operator==( const iterator &rRhs );
             bool operator==( const const_iterator &rRhs );
             bool operator!=( const iterator &rRhs );
@@ -97,6 +114,7 @@ namespace Bu
         friend class iterator;
         private:
             const_iterator( const Blob *pBlob, bool bForward );
+            const_iterator( const Blob *pBlob, int32_t iIndex, bool bForward );
 
         public:
             const_iterator();
@@ -107,10 +125,12 @@ namespace Bu
             operator bool() const;
             char operator *() const;
 
-            const_iterator &operator++( int );
+            const_iterator &operator++( int32_t );
             const_iterator &operator++();
-            const_iterator &operator--( int );
+            const_iterator &operator--( int32_t );
             const_iterator &operator--();
+            const_iterator operator+( int32_t iDelta ) const;
+            const_iterator operator-( int32_t iDelta ) const;
             bool operator==( const iterator &rRhs );
             bool operator==( const const_iterator &rRhs );
             bool operator!=( const iterator &rRhs );
@@ -125,15 +145,6 @@ namespace Bu
             bool bForward;
         };
 
-        iterator begin();
-        const_iterator begin() const;
-        iterator end();
-        const_iterator end() const;
-        iterator rbegin();
-        const_iterator rbegin() const;
-        iterator rend();
-        const_iterator rend() const;
-
     private:
         char *pData;
         int32_t iSize;