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"""A pure Python implementation of binascii.
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Rather slow and buggy in corner cases.
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PyPy provides an RPython version too.
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"""
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# borrowed from https://bitbucket.org/pypy/pypy/src/f2bf94943a41/lib_pypy/binascii.py
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class Error(Exception):
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pass
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class Done(Exception):
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pass
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class Incomplete(Exception):
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pass
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def a2b_uu(s):
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if not s:
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return ''
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length = (ord(s[0]) - 0x20) % 64
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def quadruplets_gen(s):
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while s:
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try:
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yield ord(s[0]), ord(s[1]), ord(s[2]), ord(s[3])
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except IndexError:
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s += ' '
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yield ord(s[0]), ord(s[1]), ord(s[2]), ord(s[3])
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return
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s = s[4:]
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try:
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result = [''.join(
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[chr((A - 0x20) << 2 | (((B - 0x20) >> 4) & 0x3)),
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chr(((B - 0x20) & 0xf) << 4 | (((C - 0x20) >> 2) & 0xf)),
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chr(((C - 0x20) & 0x3) << 6 | ((D - 0x20) & 0x3f))
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]) for A, B, C, D in quadruplets_gen(s[1:].rstrip())]
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except ValueError:
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raise Error('Illegal char')
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result = ''.join(result)
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trailingdata = result[length:]
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if trailingdata.strip('\x00'):
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raise Error('Trailing garbage')
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result = result[:length]
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if len(result) < length:
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result += ((length - len(result)) * '\x00')
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return bytes(result, __BRYTHON__.charset)
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def b2a_uu(s):
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length = len(s)
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if length > 45:
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raise Error('At most 45 bytes at once')
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def triples_gen(s):
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while s:
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try:
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yield ord(s[0]), ord(s[1]), ord(s[2])
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except IndexError:
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s += '\0\0'
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yield ord(s[0]), ord(s[1]), ord(s[2])
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return
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s = s[3:]
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result = [''.join(
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[chr(0x20 + (( A >> 2 ) & 0x3F)),
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chr(0x20 + (((A << 4) | ((B >> 4) & 0xF)) & 0x3F)),
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chr(0x20 + (((B << 2) | ((C >> 6) & 0x3)) & 0x3F)),
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chr(0x20 + (( C ) & 0x3F))])
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for A, B, C in triples_gen(s)]
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return chr(ord(' ') + (length & 0o77)) + ''.join(result) + '\n'
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table_a2b_base64 = {
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'A': 0,
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'B': 1,
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'C': 2,
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'D': 3,
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'E': 4,
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'F': 5,
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'G': 6,
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'H': 7,
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'I': 8,
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'J': 9,
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'K': 10,
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'L': 11,
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'M': 12,
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'N': 13,
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'O': 14,
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'P': 15,
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'Q': 16,
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'R': 17,
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'S': 18,
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'T': 19,
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'U': 20,
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'V': 21,
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'W': 22,
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'X': 23,
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'Y': 24,
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'Z': 25,
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'a': 26,
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'b': 27,
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'c': 28,
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'd': 29,
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'e': 30,
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'f': 31,
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'g': 32,
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'h': 33,
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'i': 34,
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'j': 35,
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'k': 36,
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'l': 37,
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'm': 38,
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'n': 39,
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'o': 40,
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'p': 41,
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'q': 42,
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'r': 43,
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's': 44,
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't': 45,
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'u': 46,
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'v': 47,
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'w': 48,
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'x': 49,
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'y': 50,
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'z': 51,
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'0': 52,
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'1': 53,
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'2': 54,
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'3': 55,
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'4': 56,
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'5': 57,
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'6': 58,
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'7': 59,
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'8': 60,
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'9': 61,
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'+': 62,
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'/': 63,
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'=': 0,
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}
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def a2b_base64(s):
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if not isinstance(s, (str, bytes)):
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raise TypeError("expected string, got %r" % (s,))
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s = s.rstrip()
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# clean out all invalid characters, this also strips the final '=' padding
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# check for correct padding
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def next_valid_char(s, pos):
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for i in range(pos + 1, len(s)):
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c = s[i]
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if c < 0x7f:
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try:
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table_a2b_base64[chr(c)]
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return chr(c)
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except KeyError:
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pass
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return None
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quad_pos = 0
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leftbits = 0
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leftchar = 0
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res = []
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for i, c in enumerate(s):
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if isinstance(c, int):
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c = chr(c)
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if c > '\x7f' or c == '\n' or c == '\r' or c == ' ':
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continue
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if c == '=':
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if quad_pos < 2 or (quad_pos == 2 and next_valid_char(s, i) != '='):
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continue
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else:
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leftbits = 0
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break
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try:
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next_c = table_a2b_base64[c]
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except KeyError:
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continue
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quad_pos = (quad_pos + 1) & 0x03
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leftchar = (leftchar << 6) | next_c
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leftbits += 6
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if leftbits >= 8:
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leftbits -= 8
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res.append((leftchar >> leftbits & 0xff))
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leftchar &= ((1 << leftbits) - 1)
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if leftbits != 0:
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raise Error('Incorrect padding')
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return bytes(''.join([chr(i) for i in res]),__BRYTHON__.charset)
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table_b2a_base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"\
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"0123456789+/"
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def b2a_base64(s):
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length = len(s)
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final_length = length % 3
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def triples_gen(s):
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while s:
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try:
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yield s[0], s[1], s[2]
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except IndexError:
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s += b'\0\0'
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yield s[0], s[1], s[2]
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return
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s = s[3:]
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a = triples_gen(s[ :length - final_length])
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result = [''.join(
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[table_b2a_base64[( A >> 2 ) & 0x3F],
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table_b2a_base64[((A << 4) | ((B >> 4) & 0xF)) & 0x3F],
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table_b2a_base64[((B << 2) | ((C >> 6) & 0x3)) & 0x3F],
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table_b2a_base64[( C ) & 0x3F]])
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for A, B, C in a]
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final = s[length - final_length:]
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if final_length == 0:
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snippet = ''
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elif final_length == 1:
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a = final[0]
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snippet = table_b2a_base64[(a >> 2 ) & 0x3F] + \
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table_b2a_base64[(a << 4 ) & 0x3F] + '=='
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else:
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a = final[0]
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b = final[1]
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snippet = table_b2a_base64[(a >> 2) & 0x3F] + \
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table_b2a_base64[((a << 4) | (b >> 4) & 0xF) & 0x3F] + \
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table_b2a_base64[(b << 2) & 0x3F] + '='
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return bytes(''.join(result) + snippet + '\n', __BRYTHON__.charset)
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def a2b_qp(s, header=False):
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inp = 0
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odata = []
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while inp < len(s):
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if s[inp] == '=':
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inp += 1
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if inp >= len(s):
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break
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# Soft line breaks
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if (s[inp] == '\n') or (s[inp] == '\r'):
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if s[inp] != '\n':
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while inp < len(s) and s[inp] != '\n':
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inp += 1
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if inp < len(s):
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inp += 1
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elif s[inp] == '=':
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# broken case from broken python qp
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odata.append('=')
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inp += 1
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elif s[inp] in hex_numbers and s[inp + 1] in hex_numbers:
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ch = chr(int(s[inp:inp+2], 16))
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inp += 2
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odata.append(ch)
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else:
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odata.append('=')
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elif header and s[inp] == '_':
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odata.append(' ')
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inp += 1
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else:
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odata.append(s[inp])
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inp += 1
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return bytes(''.join(odata), __BRYTHON__.charset)
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def b2a_qp(data, quotetabs=False, istext=True, header=False):
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"""quotetabs=True means that tab and space characters are always
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quoted.
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istext=False means that \r and \n are treated as regular characters
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header=True encodes space characters with '_' and requires
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real '_' characters to be quoted.
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"""
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MAXLINESIZE = 76
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# See if this string is using CRLF line ends
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lf = data.find('\n')
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crlf = lf > 0 and data[lf-1] == '\r'
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inp = 0
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linelen = 0
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odata = []
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while inp < len(data):
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c = data[inp]
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if (c > '~' or
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c == '=' or
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(header and c == '_') or
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(c == '.' and linelen == 0 and (inp+1 == len(data) or
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data[inp+1] == '\n' or
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data[inp+1] == '\r')) or
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(not istext and (c == '\r' or c == '\n')) or
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((c == '\t' or c == ' ') and (inp + 1 == len(data))) or
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(c <= ' ' and c != '\r' and c != '\n' and
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|
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(quotetabs or (not quotetabs and (c != '\t' and c != ' '))))):
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linelen += 3
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if linelen >= MAXLINESIZE:
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odata.append('=')
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if crlf: odata.append('\r')
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odata.append('\n')
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linelen = 3
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odata.append('=' + two_hex_digits(ord(c)))
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inp += 1
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else:
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|
if (istext and
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|
(c == '\n' or (inp+1 < len(data) and c == '\r' and
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data[inp+1] == '\n'))):
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linelen = 0
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|
# Protect against whitespace on end of line
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|
if (len(odata) > 0 and
|
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|
(odata[-1] == ' ' or odata[-1] == '\t')):
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|
ch = ord(odata[-1])
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|
odata[-1] = '='
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|
odata.append(two_hex_digits(ch))
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|
|
if crlf: odata.append('\r')
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odata.append('\n')
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|
|
if c == '\r':
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inp += 2
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|
else:
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inp += 1
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|
else:
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|
|
if (inp + 1 < len(data) and
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data[inp+1] != '\n' and
|
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|
(linelen + 1) >= MAXLINESIZE):
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|
odata.append('=')
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|
if crlf: odata.append('\r')
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odata.append('\n')
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linelen = 0
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|
|
|
linelen += 1
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|
if header and c == ' ':
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|
c = '_'
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|
odata.append(c)
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|
inp += 1
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|
return ''.join(odata)
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|
|
|
|
hex_numbers = '0123456789ABCDEF'
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|
|
def hex(n):
|
|
|
if n == 0:
|
|
|
return '0'
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|
|
|
|
if n < 0:
|
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|
n = -n
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|
sign = '-'
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|
else:
|
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|
sign = ''
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|
|
arr = []
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|
|
|
|
|
def hex_gen(n):
|
|
|
""" Yield a nibble at a time. """
|
|
|
while n:
|
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|
yield n % 0x10
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|
|
n = n / 0x10
|
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|
|
|
|
for nibble in hex_gen(n):
|
|
|
arr = [hex_numbers[nibble]] + arr
|
|
|
return sign + ''.join(arr)
|
|
|
|
|
|
def two_hex_digits(n):
|
|
|
return hex_numbers[n / 0x10] + hex_numbers[n % 0x10]
|
|
|
|
|
|
|
|
|
def strhex_to_int(s):
|
|
|
i = 0
|
|
|
for c in s:
|
|
|
i = i * 0x10 + hex_numbers.index(c)
|
|
|
return i
|
|
|
|
|
|
hqx_encoding = '!"#$%&\'()*+,-012345689@ABCDEFGHIJKLMNPQRSTUVXYZ[`abcdefhijklmpqr'
|
|
|
|
|
|
DONE = 0x7f
|
|
|
SKIP = 0x7e
|
|
|
FAIL = 0x7d
|
|
|
|
|
|
table_a2b_hqx = [
|
|
|
#^@ ^A ^B ^C ^D ^E ^F ^G
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
#\b \t \n ^K ^L \r ^N ^O
|
|
|
FAIL, FAIL, SKIP, FAIL, FAIL, SKIP, FAIL, FAIL,
|
|
|
#^P ^Q ^R ^S ^T ^U ^V ^W
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
#^X ^Y ^Z ^[ ^\ ^] ^^ ^_
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
# ! " # $ % & '
|
|
|
FAIL, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
|
|
|
#( ) * + , - . /
|
|
|
0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, FAIL, FAIL,
|
|
|
#0 1 2 3 4 5 6 7
|
|
|
0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, FAIL,
|
|
|
#8 9 : ; < = > ?
|
|
|
0x14, 0x15, DONE, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
#@ A B C D E F G
|
|
|
0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
|
|
|
#H I J K L M N O
|
|
|
0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, FAIL,
|
|
|
#P Q R S T U V W
|
|
|
0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, FAIL,
|
|
|
#X Y Z [ \ ] ^ _
|
|
|
0x2C, 0x2D, 0x2E, 0x2F, FAIL, FAIL, FAIL, FAIL,
|
|
|
#` a b c d e f g
|
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, FAIL,
|
|
|
#h i j k l m n o
|
|
|
0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, FAIL, FAIL,
|
|
|
#p q r s t u v w
|
|
|
0x3D, 0x3E, 0x3F, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
#x y z { | } ~ ^?
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
|
|
|
]
|
|
|
|
|
|
def a2b_hqx(s):
|
|
|
result = []
|
|
|
|
|
|
def quadruples_gen(s):
|
|
|
t = []
|
|
|
for c in s:
|
|
|
res = table_a2b_hqx[ord(c)]
|
|
|
if res == SKIP:
|
|
|
continue
|
|
|
elif res == FAIL:
|
|
|
raise Error('Illegal character')
|
|
|
elif res == DONE:
|
|
|
yield t
|
|
|
raise Done
|
|
|
else:
|
|
|
t.append(res)
|
|
|
if len(t) == 4:
|
|
|
yield t
|
|
|
t = []
|
|
|
yield t
|
|
|
|
|
|
done = 0
|
|
|
try:
|
|
|
for snippet in quadruples_gen(s):
|
|
|
length = len(snippet)
|
|
|
if length == 4:
|
|
|
result.append(chr(((snippet[0] & 0x3f) << 2) | (snippet[1] >> 4)))
|
|
|
result.append(chr(((snippet[1] & 0x0f) << 4) | (snippet[2] >> 2)))
|
|
|
result.append(chr(((snippet[2] & 0x03) << 6) | (snippet[3])))
|
|
|
elif length == 3:
|
|
|
result.append(chr(((snippet[0] & 0x3f) << 2) | (snippet[1] >> 4)))
|
|
|
result.append(chr(((snippet[1] & 0x0f) << 4) | (snippet[2] >> 2)))
|
|
|
elif length == 2:
|
|
|
result.append(chr(((snippet[0] & 0x3f) << 2) | (snippet[1] >> 4)))
|
|
|
except Done:
|
|
|
done = 1
|
|
|
except Error:
|
|
|
raise
|
|
|
return (''.join(result), done)
|
|
|
# should this return a bytes object?
|
|
|
#return (bytes(''.join(result), __BRYTHON__.charset), done)
|
|
|
|
|
|
def b2a_hqx(s):
|
|
|
result =[]
|
|
|
|
|
|
def triples_gen(s):
|
|
|
while s:
|
|
|
try:
|
|
|
yield ord(s[0]), ord(s[1]), ord(s[2])
|
|
|
except IndexError:
|
|
|
yield tuple([ord(c) for c in s])
|
|
|
s = s[3:]
|
|
|
|
|
|
for snippet in triples_gen(s):
|
|
|
length = len(snippet)
|
|
|
if length == 3:
|
|
|
result.append(
|
|
|
hqx_encoding[(snippet[0] & 0xfc) >> 2])
|
|
|
result.append(hqx_encoding[
|
|
|
((snippet[0] & 0x03) << 4) | ((snippet[1] & 0xf0) >> 4)])
|
|
|
result.append(hqx_encoding[
|
|
|
(snippet[1] & 0x0f) << 2 | ((snippet[2] & 0xc0) >> 6)])
|
|
|
result.append(hqx_encoding[snippet[2] & 0x3f])
|
|
|
elif length == 2:
|
|
|
result.append(
|
|
|
hqx_encoding[(snippet[0] & 0xfc) >> 2])
|
|
|
result.append(hqx_encoding[
|
|
|
((snippet[0] & 0x03) << 4) | ((snippet[1] & 0xf0) >> 4)])
|
|
|
result.append(hqx_encoding[
|
|
|
(snippet[1] & 0x0f) << 2])
|
|
|
elif length == 1:
|
|
|
result.append(
|
|
|
hqx_encoding[(snippet[0] & 0xfc) >> 2])
|
|
|
result.append(hqx_encoding[
|
|
|
((snippet[0] & 0x03) << 4)])
|
|
|
return ''.join(result)
|
|
|
|
|
|
crctab_hqx = [
|
|
|
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
|
|
|
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
|
|
|
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
|
|
|
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
|
|
|
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
|
|
|
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
|
|
|
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
|
|
|
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
|
|
|
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
|
|
|
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
|
|
|
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
|
|
|
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
|
|
|
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
|
|
|
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
|
|
|
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
|
|
|
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
|
|
|
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
|
|
|
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
|
|
|
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
|
|
|
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
|
|
|
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
|
|
|
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
|
|
|
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
|
|
|
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
|
|
|
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
|
|
|
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
|
|
|
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
|
|
|
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
|
|
|
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
|
|
|
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
|
|
|
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
|
|
|
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
|
|
|
]
|
|
|
|
|
|
def crc_hqx(s, crc):
|
|
|
for c in s:
|
|
|
crc = ((crc << 8) & 0xff00) ^ crctab_hqx[((crc >> 8) & 0xff) ^ ord(c)]
|
|
|
|
|
|
return crc
|
|
|
|
|
|
def rlecode_hqx(s):
|
|
|
"""
|
|
|
Run length encoding for binhex4.
|
|
|
The CPython implementation does not do run length encoding
|
|
|
of \x90 characters. This implementation does.
|
|
|
"""
|
|
|
if not s:
|
|
|
return ''
|
|
|
result = []
|
|
|
prev = s[0]
|
|
|
count = 1
|
|
|
# Add a dummy character to get the loop to go one extra round.
|
|
|
# The dummy must be different from the last character of s.
|
|
|
# In the same step we remove the first character, which has
|
|
|
# already been stored in prev.
|
|
|
if s[-1] == '!':
|
|
|
s = s[1:] + '?'
|
|
|
else:
|
|
|
s = s[1:] + '!'
|
|
|
|
|
|
for c in s:
|
|
|
if c == prev and count < 255:
|
|
|
count += 1
|
|
|
else:
|
|
|
if count == 1:
|
|
|
if prev != '\x90':
|
|
|
result.append(prev)
|
|
|
else:
|
|
|
result.extend(['\x90', '\x00'])
|
|
|
elif count < 4:
|
|
|
if prev != '\x90':
|
|
|
result.extend([prev] * count)
|
|
|
else:
|
|
|
result.extend(['\x90', '\x00'] * count)
|
|
|
else:
|
|
|
if prev != '\x90':
|
|
|
result.extend([prev, '\x90', chr(count)])
|
|
|
else:
|
|
|
result.extend(['\x90', '\x00', '\x90', chr(count)])
|
|
|
count = 1
|
|
|
prev = c
|
|
|
|
|
|
return ''.join(result)
|
|
|
|
|
|
def rledecode_hqx(s):
|
|
|
s = s.split('\x90')
|
|
|
result = [s[0]]
|
|
|
prev = s[0]
|
|
|
for snippet in s[1:]:
|
|
|
count = ord(snippet[0])
|
|
|
if count > 0:
|
|
|
result.append(prev[-1] * (count-1))
|
|
|
prev = snippet
|
|
|
else:
|
|
|
result.append('\x90')
|
|
|
prev = '\x90'
|
|
|
result.append(snippet[1:])
|
|
|
|
|
|
return ''.join(result)
|
|
|
|
|
|
crc_32_tab = [
|
|
|
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
|
|
|
0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
|
|
|
0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
|
|
|
0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
|
|
|
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
|
|
|
0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
|
|
|
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
|
|
|
0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
|
|
|
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
|
|
|
0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
|
|
|
0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
|
|
|
0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
|
|
|
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
|
|
|
0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
|
|
|
0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
|
|
|
0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
|
|
|
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
|
|
|
0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
|
|
|
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
|
|
|
0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
|
|
|
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
|
|
|
0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
|
|
|
0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
|
|
|
0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
|
|
|
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
|
|
|
0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
|
|
|
0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
|
|
|
0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
|
|
|
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
|
|
|
0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
|
|
|
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
|
|
|
0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
|
|
|
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
|
|
|
0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
|
|
|
0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
|
|
|
0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
|
|
|
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
|
|
|
0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
|
|
|
0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
|
|
|
0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
|
|
|
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
|
|
|
0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
|
|
|
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
|
|
|
0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
|
|
|
0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
|
|
|
0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
|
|
|
0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
|
|
|
0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
|
|
|
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
|
|
|
0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
|
|
|
0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
|
|
|
0x2d02ef8d
|
|
|
]
|
|
|
|
|
|
def crc32(s, crc=0):
|
|
|
result = 0
|
|
|
crc = ~int(crc) & 0xffffffff
|
|
|
#crc = ~long(crc) & 0xffffffffL
|
|
|
for c in s:
|
|
|
crc = crc_32_tab[(crc ^ int(ord(c))) & 0xff] ^ (crc >> 8)
|
|
|
#crc = crc_32_tab[(crc ^ long(ord(c))) & 0xffL] ^ (crc >> 8)
|
|
|
#/* Note: (crc >> 8) MUST zero fill on left
|
|
|
|
|
|
result = crc ^ 0xffffffff
|
|
|
|
|
|
if result > 2**31:
|
|
|
result = ((result + 2**31) % 2**32) - 2**31
|
|
|
|
|
|
return result
|
|
|
|
|
|
def b2a_hex(s):
|
|
|
result = []
|
|
|
for char in s:
|
|
|
c = (ord(char) >> 4) & 0xf
|
|
|
if c > 9:
|
|
|
c = c + ord('a') - 10
|
|
|
else:
|
|
|
c = c + ord('0')
|
|
|
result.append(chr(c))
|
|
|
c = ord(char) & 0xf
|
|
|
if c > 9:
|
|
|
c = c + ord('a') - 10
|
|
|
else:
|
|
|
c = c + ord('0')
|
|
|
result.append(chr(c))
|
|
|
return ''.join(result)
|
|
|
|
|
|
hexlify = b2a_hex
|
|
|
|
|
|
table_hex = [
|
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1, -1,-1,-1,-1,
|
|
|
-1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
|
-1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
|
|
|
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1
|
|
|
]
|
|
|
|
|
|
|
|
|
def a2b_hex(t):
|
|
|
result = []
|
|
|
|
|
|
def pairs_gen(s):
|
|
|
while s:
|
|
|
try:
|
|
|
yield table_hex[ord(s[0])], table_hex[ord(s[1])]
|
|
|
except IndexError:
|
|
|
if len(s):
|
|
|
raise TypeError('Odd-length string')
|
|
|
return
|
|
|
s = s[2:]
|
|
|
|
|
|
for a, b in pairs_gen(t):
|
|
|
if a < 0 or b < 0:
|
|
|
raise TypeError('Non-hexadecimal digit found')
|
|
|
result.append(chr((a << 4) + b))
|
|
|
return bytes(''.join(result), __BRYTHON__.charset)
|
|
|
|
|
|
|
|
|
unhexlify = a2b_hex
|
|
|
|
