hexdump

hexdump.py

# -*- mode: python; coding: utf-8 -*-
#
# Time-stamp: <Thu May 29 21:49:30 東京 (標準時) 2014>
#
#
import os
import sys
import struct
import string
import binascii

# hexdump
#
#
def hexdump( dat, offset, size ):
    def printable( d ):
        c = chr( struct.unpack("B",d)[0])
        if c in string.digits or c in string.ascii_letters or c in string.punctuation :
            return c
        return "."
    def printdump( address, hexprint, asciiprint ):
        print "%(addr)08x : %(tmp)s : %(asc)s" % {
            'addr': (address & 0xfffffff0), 'tmp': hexprint, 'asc': asciiprint }
        return

    total_size = len(dat)
    if offset + size > total_size:
        size + total_size - offset

    addr = offset & 0xfffffff0
    pads = offset & 0x0000000f
    tmp  = ""
    asc  = ""
    for idx in range(0,pads):
        tmp = tmp + "-- "
        asc = asc + "-"
        addr = addr + 1
    for idx in range(0,size):
        tmp = tmp + binascii.hexlify(dat[offset+idx]) +" "
        asc = asc + printable(dat[offset+idx])
        if addr % 16 == 15:
            printdump( addr, tmp, asc )
            tmp = ""
            asc = ""

        addr = addr + 1

    pads = (16 - (addr & 0x0000000f)) % 16
    if pads > 0:
        for idx in range(0,pads):
            tmp = tmp + "-- "
            asc = asc + "-"
            addr = addr + 1
    if tmp != "":
        printdump( addr, tmp, asc )

    return

#
#
#
if __name__ == '__main__':
    print "Hi there", sys.argv[1]
    f = open(sys.argv[1], "rb")
    try:
        d = f.read()
    finally:
        f.close()

    print "test-1 18 size30"
    hexdump(d, 20, 30)

    print "test-2 0 size 32"
    hexdump(d, 0, 32)

こんな感じの16進ダンプが欲しくてつくる

python hexdump.py tmp.mp3
Hi there tmp.mp3
test-1 18 size30
00000010 : -- -- -- -- 79 00 45 35 5a 54 00 67 93 28 20 39 : ----y.E5ZT.g.(.9
00000020 : a5 8e 26 11 03 be 18 4a c1 c3 3a 8e 05 84 f5 bc : ..&....J..:.....
00000040 : 40 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- : @P--------------
test-2 0 size 32
00000000 : ff fb 44 c0 00 00 05 a4 0f 1b 20 98 40 41 3c 27 : ..D.........@A<'
00000010 : e8 34 61 89 79 00 45 35 5a 54 00 67 93 28 20 39 : .4a.y.E5ZT.g.(.9