代码
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head.py 输出文件开头的8个字节的二进制表示
语言: Python, 标签: 文件 2009/09/09发布 11个月前更新 更新记录作者: 半瓶墨水, 点击648次, 评论(0), 收藏者(0), , 打分:
Python语言: head.py 输出文件开头的8个字节的二进制表示
01 #! /usr/bin/env python
02 # -*- coding: utf-8 -*-
03 #
04 # Recently I start to write an ico file maker
05 # this script helps on analyze the file header
06 #
07 # Usage:
08 # head xxx.ico - output 16 bytes
09 # head xxx.ico 32 - output 32 bytes
10 #
11 import sys
12 f = open(sys.argv[1], "rb")
13 L = 16
14 if len(sys.argv) >= 3:
15 L = int(sys.argv[2])
16 bytes = f.read(L)
17 for i in range(0, len(bytes), 8):
18 print bytes[i:i+8]
19
20 xbytes = ["%02x" % ord(b) for b in bytes]
21 print
22 for i in range(0, len(bytes), 8):
23 print "x " + " ".join(xbytes[i:i+8])
24
25 def to_bits(b):
26 bs = []
27 while b:
28 bs.append(b&1)
29 b>>=1
30 bs = map(str, bs)
31 bs.reverse()
32 return "".join(bs).zfill(8)
33
34 bits = [to_bits(ord(b)) for b in bytes]
35 print
36 for i in range(0, len(bytes), 8):
37 print "b " + " ".join(bits[i:i+8])
02 # -*- coding: utf-8 -*-
03 #
04 # Recently I start to write an ico file maker
05 # this script helps on analyze the file header
06 #
07 # Usage:
08 # head xxx.ico - output 16 bytes
09 # head xxx.ico 32 - output 32 bytes
10 #
11 import sys
12 f = open(sys.argv[1], "rb")
13 L = 16
14 if len(sys.argv) >= 3:
15 L = int(sys.argv[2])
16 bytes = f.read(L)
17 for i in range(0, len(bytes), 8):
18 print bytes[i:i+8]
19
20 xbytes = ["%02x" % ord(b) for b in bytes]
21 print
22 for i in range(0, len(bytes), 8):
23 print "x " + " ".join(xbytes[i:i+8])
24
25 def to_bits(b):
26 bs = []
27 while b:
28 bs.append(b&1)
29 b>>=1
30 bs = map(str, bs)
31 bs.reverse()
32 return "".join(bs).zfill(8)
33
34 bits = [to_bits(ord(b)) for b in bytes]
35 print
36 for i in range(0, len(bytes), 8):
37 print "b " + " ".join(bits[i:i+8])
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