On Fri, 2015-07-24 at 10:01 +0200, Jakub Jelinek wrote:
> #!/usr/bin/python
> import sys
> with open(sys.argv[1],"rb") as f:
> nextblock = f.read(12)
> while 1:
> block = nextblock
> nextblock = f.read(12)
> if block == "":
> break
> str = ""
> for ch in block:
> if str == "":
> str = " "
> else:
> str += ", "
> if ord(ch) < 10:
> str += "0x0" + chr(ord('0')+ord(ch))
> elif ord(ch) < 16:
> str += "0x0" + chr(ord('a')+ord(ch)-10)
> else:
> str += hex(ord(ch))
> if nextblock != "":
> str += ","
> print str
>
> python ./xxd.py $< >> $@
> does the same thing as
> cat $< | xxd -include >> $@
> (CCing David as python expert, my python knowledge is limited and
> 15 years old, not sure how portable this is (python 2 vs. python 3,
> and
> even python 2 minimal versions)).
It doesn't work with Python 3 for various reasons ("print" syntax, and
str vs bytes issues).
I'm attaching a version which works with both Python 2 and Python 3
(2.7.5 and 3.3.2 were the versions I tried).
It ought to work with much older python 2 versions (as your script
appears to), but I don't have them handy.
Presumably it would need a license header and some descriptive comments.
(snip)
Dave
#!/usr/bin/python
import sys
if sys.version_info[0] == 2:
# Python 2:
# 'block' below is an instance of str; iterating over it gives us
# str instances of len 1.
def get_byte(ch):
return ord(ch)
else:
# Python 3:
# 'block' below is an instance of bytes; iterating over it gives us
# instances of int, in the range 0-255.
def get_byte(ch):
return ch
with open(sys.argv[1],"rb") as f:
nextblock = f.read(12)
while 1:
block = nextblock
nextblock = f.read(12)
if not block:
break
str = ""
for item in block:
byte = get_byte(item)
if str == "":
str = " "
else:
str += ", "
if byte < 10:
str += "0x0" + chr(ord('0')+byte)
elif byte < 16:
str += "0x0" + chr(ord('a')+byte-10)
else:
str += hex(byte)
if nextblock:
str += ","
print(str)
