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#!/usr/bin/env python
import sys
DIR_MASK = 0b10000000
RECIPIENT_MASK = 0b00011111
TYPE_MASK = 0b01100000
direction_decode_table = {0x00:'out', 0x80:'in'}
recipient_decode_table = ['device', 'interface', 'endpoint', 'other', 'reserved']
transfer_type_decode_table = ['standard', 'class', 'vendor', 'reserved']
if len(sys.argv) < 2:
print ('Usage: decode-request-type <request-type>')
sys.exit(1)
request_type = int(sys.argv[1], 0)
direction = request_type & DIR_MASK
recipient = request_type & RECIPIENT_MASK
transfer_type = (request_type & TYPE_MASK) >> 5
if recipient > len(recipient_decode_table)-1:
recipient = len(recipient_decode_table) - 1
print ('direction=%s, type=%s, recipient=%s' % \
(direction_decode_table[direction],
transfer_type_decode_table[transfer_type],
recipient_decode_table[recipient]))
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