1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
#!/usr/bin/env python
from __future__ import print_function
import sys
# decodes 6bit characters to ASCII
DECODING_TABLE = ' 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz'
def atom_read(x):
result = ''
read_chars = ((x & 0xF000000000000000) >> 60) == 0xF
mask = 0x0FC0000000000000
bitshift = 54
while bitshift >= 0:
if read_chars:
result += DECODING_TABLE[(x & mask) >> bitshift]
elif ((x & mask) >> bitshift) == 0xF:
read_chars = True
bitshift -= 6
mask = mask >> 6
return result
if __name__ == '__main__':
if len(sys.argv) != 2:
print('*** Usage: atom.py <atom_val>')
sys.exit(-1)
try:
s = sys.argv[1]
if s.startswith('0x'):
val = int(s, 16)
else:
val = int(s)
print(atom_read(val))
except ValueError:
print('Not a number:', sys.argv[1])
print('*** Usage: atom.py <atom_val>')
sys.exit(-2)
|
