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d| |dz fS t j d |dz }|dk rd|fS |dk( ryt j d )a Get value length for a key in rd.
For a key at position pos in the Report Descriptor rd, return the length
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values.
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rd: Report Descriptor
pos: The position of the key in rd.
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(key_size, data_len) where key_size is the number of bytes occupied by
the key and data_len is the length of the value associated by the key.
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}|t | k r|S )a Parse the binary report descriptor.
Parse the binary report descriptor into a DeviceDescriptor object.
Args:
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desc: The DeviceDescriptor object to update with the results
from parsing the descriptor.
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