zfec: rearrange files

[tahoe-lafs/zfec.git] / zfec / zfec / easyfec.py

diff --git a/zfec/zfec/easyfec.py b/zfec/zfec/easyfec.py
deleted file mode 100644 (file)
index dd209e7..0000000
--- a/zfec/zfec/easyfec.py
+++ /dev/null
@@ -1,64 +0,0 @@
-# zfec -- a fast C implementation of Reed-Solomon erasure coding with
-# command-line, C, and Python interfaces
-
-import zfec
-
-# div_ceil() was copied from the pyutil library.
-def div_ceil(n, d):
-    """
-    The smallest integer k such that k*d >= n.
-    """
-    return (n/d) + (n%d != 0)
-
-from base64 import b32encode
-def ab(x): # debuggery
-    if len(x) >= 3:
-        return "%s:%s" % (len(x), b32encode(x[-3:]),)
-    elif len(x) == 2:
-        return "%s:%s" % (len(x), b32encode(x[-2:]),)
-    elif len(x) == 1:
-        return "%s:%s" % (len(x), b32encode(x[-1:]),)
-    elif len(x) == 0:
-        return "%s:%s" % (len(x), "--empty--",)
-
-class Encoder(object):
-    def __init__(self, k, m):
-        self.fec = zfec.Encoder(k, m)
-
-    def encode(self, data):
-        """
-        @param data: string
-
-        @return: a sequence of m blocks -- any k of which suffice to
-            reconstruct the input data
-        """
-        chunksize = div_ceil(len(data), self.fec.k)
-        l = [ data[i*chunksize:(i+1)*chunksize] + "\x00" * min(chunksize, (((i+1)*chunksize)-len(data))) for i in range(self.fec.k) ]
-        assert len(l) == self.fec.k, (len(l), self.fec.k,)
-        assert (not l) or (not [ x for x in l if len(x) != len(l[0]) ], (len(l), [ ab(x) for x in l ], chunksize, self.fec.k, len(data),))
-        return self.fec.encode(l)
-        
-class Decoder(object):
-    def __init__(self, k, m):
-        self.fec = zfec.Decoder(k, m)
-
-    def decode(self, blocks, sharenums, padlen):
-        """
-        @param padlen: the number of bytes of padding to strip off;  Note that
-            the padlen is always equal to (blocksize times k) minus the length
-            of data.  (Therefore, padlen can be 0.)
-        """
-        data = ''.join(self.fec.decode(blocks, sharenums))
-        if padlen:
-            return data[:-padlen]
-        else:
-            return data
-
-# zfec -- fast forward error correction library with Python interface
-# 
-# Copyright (C) 2007 Allmydata, Inc.
-# Author: Zooko Wilcox-O'Hearn
-# 
-# This file is part of zfec.
-# 
-# See README.rst for licensing information.