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-rw-r--r--FuseArchive/ChunkBufferMem.py37
1 files changed, 37 insertions, 0 deletions
diff --git a/FuseArchive/ChunkBufferMem.py b/FuseArchive/ChunkBufferMem.py
new file mode 100644
index 0000000..e1599be
--- /dev/null
+++ b/FuseArchive/ChunkBufferMem.py
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+import logging
+
+# Handle efficient operations on a non-fixed length buffer like appending,
+# replacing, reading chunks, etc
+class ChunkBufferMem:
+ def __init__( self, data = '' ):
+ logging.debug( "Creating chunkbuffer: %s" % data )
+ self.l = len( data )
+ self.chunk = [ data ]
+
+ def append( self, s ):
+ self.l += len( s )
+ self.chunk.append( s )
+
+ # Note: replace doesn't effect length so we don't update it
+ def replace( self, buf, start, end ):
+ # We make a string of our chunk, then create a new list of the 3
+ # strings, the start, new chunk, and remaining chunk
+ s = ''.join( self.chunk )
+ l = end - start
+ self.chunk = [ s[ :start ], buf[ :l ], s[ end: ] ]
+
+ def length( self ):
+ return self.l
+
+ def truncate( self, l ):
+ s = ''.join( self.chunk )
+ self.l = l
+ self.chunk = [ s[ :l ] ]
+
+ def _simplify( self ):
+ logging.debug( "Simplify!" )
+ self.chunk = [ ''.join( self.chunk ) ]
+
+ def string(self):
+ logging.debug( "Stringifying: %s" % self.chunk )
+ return ''.join( self.chunk )