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import lz4.frame as lz4frame
def get_frame_info_check(compressed_data,
source_size,
store_size,
block_size,
block_linked,
content_checksum,
block_checksum):
frame_info = lz4frame.get_frame_info(compressed_data)
assert frame_info["content_checksum"] == content_checksum
assert frame_info["block_checksum"] == block_checksum
assert frame_info["skippable"] is False
if store_size is True:
assert frame_info["content_size"] == source_size
else:
assert frame_info["content_size"] == 0
if source_size > frame_info['block_size']:
# More than a single block
assert frame_info["block_linked"] == block_linked
if block_size == lz4frame.BLOCKSIZE_DEFAULT:
assert frame_info["block_size_id"] == lz4frame.BLOCKSIZE_MAX64KB
else:
assert frame_info["block_size_id"] == block_size
def get_chunked(data, nchunks):
size = len(data)
# stride = int(math.ceil(float(size)/nchunks)) # no // on py 2.6
stride = size // nchunks
start = 0
end = start + stride
while end < size:
yield data[start:end]
start += stride
end += stride
yield data[start:]
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