mirror of https://github.com/dirtbags/moth.git
87 lines
2.1 KiB
Python
87 lines
2.1 KiB
Python
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#! /usr/bin/python3
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import sys
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import struct
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import random
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stdch = ('␀·········␊··␍··'
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'················'
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' !"#$%&\'()*+,-./'
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'0123456789:;<=>?'
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'@ABCDEFGHIJKLMNO'
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'PQRSTUVWXYZ[\]^_'
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'`abcdefghijklmno'
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'pqrstuvwxyz{|}~·'
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'················'
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'················'
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'················'
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'················'
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'················'
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'················'
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'················'
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'················')
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def hexdump(buf, fd=sys.stdout, charset=stdch):
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offset = 0
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last = None
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elided = False
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for offset in range(0, len(buf), 16):
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l = buf[offset:offset+16]
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if l == last:
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if not elided:
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fd.write("*\n")
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elided = True
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continue
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else:
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last = l
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elided = False
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pad = 16-len(l)
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hx = []
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for b in l:
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hx.append('%02x' % b)
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hx += [' '] * pad
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fd.write('%08x ' % offset)
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fd.write(' '.join(hx[:8]))
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fd.write(' ')
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fd.write(' '.join(hx[8:]))
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fd.write(' |')
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fd.write(''.join(charset[b] for b in l))
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fd.write('|\n')
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fd.write('%08x\n' % len(buf))
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class Container:
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def __init__(self):
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self.contents = []
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def add(self, opcode, subcode, part, text):
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hdr = struct.pack('!BBHH',
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opcode, subcode, part,
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len(text))
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self.contents.append(hdr + text)
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random.shuffle(self.contents)
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def bytes(self):
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body = b''.join(self.contents)
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hdr = struct.pack('!LHL',
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0xB00FB00F,
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2,
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len(body))
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return hdr + body
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c = Container()
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s = open('salad.jpg', 'rb')
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i = 0
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while True:
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b = s.read(3150)
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if not b:
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break
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c.add(5, 8, i, b)
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i += 1
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hexdump(c.bytes())
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