Added the SBuffer class, a memory buffer that can be used like a stream. Yay!

1 files changed, 62 insertions, 0 deletions

diff --git a/src/sbuffer.cpp b/src/sbuffer.cpp
new file mode 100644
index 0000000..00324b5
--- /dev/null
+++ b/src/sbuffer.cpp
@@ -0,0 +1,62 @@
+#include <string.h>
+#include "sbuffer.h"
+
+SBuffer::SBuffer() :
+        bOpen( true ),
+        nPos( 0 )
+{
+}
+
+SBuffer::~SBuffer()
+{
+}
+
+void SBuffer::close()
+{
+        bOpen = false;
+        fbData.clearData();
+}
+
+size_t SBuffer::read( char *pBuf, size_t nBytes )
+{
+        long nLeft = fbData.getLength() - nPos;
+        if( nBytes > nLeft )
+                nBytes = nLeft;
+
+        if( nLeft == 0 )
+                return 0;
+
+        memcpy( pBuf, fbData.getData()+nPos, nBytes );
+        nPos += nBytes;
+
+        return nBytes;
+}
+
+size_t SBuffer::write( const char *pBuf, size_t nBytes )
+{
+        fbData.appendData( pBuf, nBytes );
+        nPos += nBytes;
+
+        return nBytes;
+}
+
+long SBuffer::tell()
+{
+        return nPos;
+}
+
+void SBuffer::seek( long offset )
+{
+        nPos += offset;
+}
+
+void SBuffer::setPos( long pos )
+{
+        nPos = pos;
+}
+
+void SBuffer::setPosEnd( long pos )
+{
+        nPos = fbData.getLength() - pos;
+}
+