cafe-grader-web

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Commit Description:
Merge pull request #17 from nattee/master...
Commit Description:
Merge pull request #17 from nattee/master upgrade to current working snapshot
References:
r715:88baf2c40c51 merge default
File last commit:
r584:056392c00e67 merge java
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lib/assets/Lib/binascii.py | 727 lines | 24.7 KiB | text/x-python | PythonLexer |
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merge with algo and add brython files that were missing
 r584 """A pure Python implementation of binascii.
Rather slow and buggy in corner cases.
PyPy provides an RPython version too.
"""
# borrowed from https://bitbucket.org/pypy/pypy/src/f2bf94943a41/lib_pypy/binascii.py
class Error(Exception):
pass
class Done(Exception):
pass
class Incomplete(Exception):
pass
def a2b_uu(s):
if not s:
return ''
length = (ord(s[0]) - 0x20) % 64
def quadruplets_gen(s):
while s:
try:
yield ord(s[0]), ord(s[1]), ord(s[2]), ord(s[3])
except IndexError:
s += ' '
yield ord(s[0]), ord(s[1]), ord(s[2]), ord(s[3])
return
s = s[4:]
try:
result = [''.join(
[chr((A - 0x20) << 2 | (((B - 0x20) >> 4) & 0x3)),
chr(((B - 0x20) & 0xf) << 4 | (((C - 0x20) >> 2) & 0xf)),
chr(((C - 0x20) & 0x3) << 6 | ((D - 0x20) & 0x3f))
]) for A, B, C, D in quadruplets_gen(s[1:].rstrip())]
except ValueError:
raise Error('Illegal char')
result = ''.join(result)
trailingdata = result[length:]
if trailingdata.strip('\x00'):
raise Error('Trailing garbage')
result = result[:length]
if len(result) < length:
result += ((length - len(result)) * '\x00')
return bytes(result, __BRYTHON__.charset)
def b2a_uu(s):
length = len(s)
if length > 45:
raise Error('At most 45 bytes at once')
def triples_gen(s):
while s:
try:
yield ord(s[0]), ord(s[1]), ord(s[2])
except IndexError:
s += '\0\0'
yield ord(s[0]), ord(s[1]), ord(s[2])
return
s = s[3:]
result = [''.join(
[chr(0x20 + (( A >> 2 ) & 0x3F)),
chr(0x20 + (((A << 4) | ((B >> 4) & 0xF)) & 0x3F)),
chr(0x20 + (((B << 2) | ((C >> 6) & 0x3)) & 0x3F)),
chr(0x20 + (( C ) & 0x3F))])
for A, B, C in triples_gen(s)]
return chr(ord(' ') + (length & 0o77)) + ''.join(result) + '\n'
table_a2b_base64 = {
'A': 0,
'B': 1,
'C': 2,
'D': 3,
'E': 4,
'F': 5,
'G': 6,
'H': 7,
'I': 8,
'J': 9,
'K': 10,
'L': 11,
'M': 12,
'N': 13,
'O': 14,
'P': 15,
'Q': 16,
'R': 17,
'S': 18,
'T': 19,
'U': 20,
'V': 21,
'W': 22,
'X': 23,
'Y': 24,
'Z': 25,
'a': 26,
'b': 27,
'c': 28,
'd': 29,
'e': 30,
'f': 31,
'g': 32,
'h': 33,
'i': 34,
'j': 35,
'k': 36,
'l': 37,
'm': 38,
'n': 39,
'o': 40,
'p': 41,
'q': 42,
'r': 43,
's': 44,
't': 45,
'u': 46,
'v': 47,
'w': 48,
'x': 49,
'y': 50,
'z': 51,
'0': 52,
'1': 53,
'2': 54,
'3': 55,
'4': 56,
'5': 57,
'6': 58,
'7': 59,
'8': 60,
'9': 61,
'+': 62,
'/': 63,
'=': 0,
}
def a2b_base64(s):
if not isinstance(s, (str, bytes)):
raise TypeError("expected string, got %r" % (s,))
s = s.rstrip()
# clean out all invalid characters, this also strips the final '=' padding
# check for correct padding
def next_valid_char(s, pos):
for i in range(pos + 1, len(s)):
c = s[i]
if c < 0x7f:
try:
table_a2b_base64[chr(c)]
return chr(c)
except KeyError:
pass
return None
quad_pos = 0
leftbits = 0
leftchar = 0
res = []
for i, c in enumerate(s):
if isinstance(c, int):
c = chr(c)
if c > '\x7f' or c == '\n' or c == '\r' or c == ' ':
continue
if c == '=':
if quad_pos < 2 or (quad_pos == 2 and next_valid_char(s, i) != '='):
continue
else:
leftbits = 0
break
try:
next_c = table_a2b_base64[c]
except KeyError:
continue
quad_pos = (quad_pos + 1) & 0x03
leftchar = (leftchar << 6) | next_c
leftbits += 6
if leftbits >= 8:
leftbits -= 8
res.append((leftchar >> leftbits & 0xff))
leftchar &= ((1 << leftbits) - 1)
if leftbits != 0:
raise Error('Incorrect padding')
return bytes(''.join([chr(i) for i in res]),__BRYTHON__.charset)
table_b2a_base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"\
"0123456789+/"
def b2a_base64(s):
length = len(s)
final_length = length % 3
def triples_gen(s):
while s:
try:
yield s[0], s[1], s[2]
except IndexError:
s += b'\0\0'
yield s[0], s[1], s[2]
return
s = s[3:]
a = triples_gen(s[ :length - final_length])
result = [''.join(
[table_b2a_base64[( A >> 2 ) & 0x3F],
table_b2a_base64[((A << 4) | ((B >> 4) & 0xF)) & 0x3F],
table_b2a_base64[((B << 2) | ((C >> 6) & 0x3)) & 0x3F],
table_b2a_base64[( C ) & 0x3F]])
for A, B, C in a]
final = s[length - final_length:]
if final_length == 0:
snippet = ''
elif final_length == 1:
a = final[0]
snippet = table_b2a_base64[(a >> 2 ) & 0x3F] + \
table_b2a_base64[(a << 4 ) & 0x3F] + '=='
else:
a = final[0]
b = final[1]
snippet = table_b2a_base64[(a >> 2) & 0x3F] + \
table_b2a_base64[((a << 4) | (b >> 4) & 0xF) & 0x3F] + \
table_b2a_base64[(b << 2) & 0x3F] + '='
return bytes(''.join(result) + snippet + '\n', __BRYTHON__.charset)
def a2b_qp(s, header=False):
inp = 0
odata = []
while inp < len(s):
if s[inp] == '=':
inp += 1
if inp >= len(s):
break
# Soft line breaks
if (s[inp] == '\n') or (s[inp] == '\r'):
if s[inp] != '\n':
while inp < len(s) and s[inp] != '\n':
inp += 1
if inp < len(s):
inp += 1
elif s[inp] == '=':
# broken case from broken python qp
odata.append('=')
inp += 1
elif s[inp] in hex_numbers and s[inp + 1] in hex_numbers:
ch = chr(int(s[inp:inp+2], 16))
inp += 2
odata.append(ch)
else:
odata.append('=')
elif header and s[inp] == '_':
odata.append(' ')
inp += 1
else:
odata.append(s[inp])
inp += 1
return bytes(''.join(odata), __BRYTHON__.charset)
def b2a_qp(data, quotetabs=False, istext=True, header=False):
"""quotetabs=True means that tab and space characters are always
quoted.
istext=False means that \r and \n are treated as regular characters
header=True encodes space characters with '_' and requires
real '_' characters to be quoted.
"""
MAXLINESIZE = 76
# See if this string is using CRLF line ends
lf = data.find('\n')
crlf = lf > 0 and data[lf-1] == '\r'
inp = 0
linelen = 0
odata = []
while inp < len(data):
c = data[inp]
if (c > '~' or
c == '=' or
(header and c == '_') or
(c == '.' and linelen == 0 and (inp+1 == len(data) or
data[inp+1] == '\n' or
data[inp+1] == '\r')) or
(not istext and (c == '\r' or c == '\n')) or
((c == '\t' or c == ' ') and (inp + 1 == len(data))) or
(c <= ' ' and c != '\r' and c != '\n' and
(quotetabs or (not quotetabs and (c != '\t' and c != ' '))))):
linelen += 3
if linelen >= MAXLINESIZE:
odata.append('=')
if crlf: odata.append('\r')
odata.append('\n')
linelen = 3
odata.append('=' + two_hex_digits(ord(c)))
inp += 1
else:
if (istext and
(c == '\n' or (inp+1 < len(data) and c == '\r' and
data[inp+1] == '\n'))):
linelen = 0
# Protect against whitespace on end of line
if (len(odata) > 0 and
(odata[-1] == ' ' or odata[-1] == '\t')):
ch = ord(odata[-1])
odata[-1] = '='
odata.append(two_hex_digits(ch))
if crlf: odata.append('\r')
odata.append('\n')
if c == '\r':
inp += 2
else:
inp += 1
else:
if (inp + 1 < len(data) and
data[inp+1] != '\n' and
(linelen + 1) >= MAXLINESIZE):
odata.append('=')
if crlf: odata.append('\r')
odata.append('\n')
linelen = 0
linelen += 1
if header and c == ' ':
c = '_'
odata.append(c)
inp += 1
return ''.join(odata)
hex_numbers = '0123456789ABCDEF'
def hex(n):
if n == 0:
return '0'
if n < 0:
n = -n
sign = '-'
else:
sign = ''
arr = []
def hex_gen(n):
""" Yield a nibble at a time. """
while n:
yield n % 0x10
n = n / 0x10
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