mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-11 13:43:37 +00:00
0d9fbc1ad7
This version of SickBeard uses both TVDB and TVRage to search and gather it's series data from allowing you to now have access to and download shows that you couldn't before because of being locked into only what TheTVDB had to offer. Also this edition is based off the code we used in our XEM editon so it does come with scene numbering support as well as all the other features our XEM edition has to offer. Please before using this with your existing database (sickbeard.db) please make a backup copy of it and delete any other database files such as cache.db and failed.db if present, we HIGHLY recommend starting out with no database files at all to make this a fresh start but the choice is at your own risk! Enjoy!
277 lines
7.2 KiB
Python
277 lines
7.2 KiB
Python
"""
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Utilities to convert integers and binary strings to binary (number), binary
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string, number, hexadecimal, etc.
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"""
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from lib.hachoir_core.endian import BIG_ENDIAN, LITTLE_ENDIAN
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from lib.hachoir_core.compatibility import reversed
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from itertools import chain, repeat
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from struct import calcsize, unpack, error as struct_error
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def swap16(value):
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"""
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Swap byte between big and little endian of a 16 bits integer.
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>>> "%x" % swap16(0x1234)
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'3412'
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"""
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return (value & 0xFF) << 8 | (value >> 8)
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def swap32(value):
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"""
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Swap byte between big and little endian of a 32 bits integer.
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>>> "%x" % swap32(0x12345678)
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'78563412'
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"""
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value = long(value)
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return ((value & 0x000000FFL) << 24) \
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| ((value & 0x0000FF00L) << 8) \
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| ((value & 0x00FF0000L) >> 8) \
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| ((value & 0xFF000000L) >> 24)
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def bin2long(text, endian):
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"""
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Convert binary number written in a string into an integer.
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Skip characters differents than "0" and "1".
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>>> bin2long("110", BIG_ENDIAN)
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6
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>>> bin2long("110", LITTLE_ENDIAN)
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3
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>>> bin2long("11 00", LITTLE_ENDIAN)
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3
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"""
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assert endian in (LITTLE_ENDIAN, BIG_ENDIAN)
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bits = [ (ord(character)-ord("0")) \
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for character in text if character in "01" ]
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assert len(bits) != 0
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if endian is not BIG_ENDIAN:
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bits = reversed(bits)
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value = 0
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for bit in bits:
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value *= 2
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value += bit
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return value
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def str2hex(value, prefix="", glue=u"", format="%02X"):
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r"""
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Convert binary string in hexadecimal (base 16).
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>>> str2hex("ABC")
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u'414243'
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>>> str2hex("\xF0\xAF", glue=" ")
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u'F0 AF'
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>>> str2hex("ABC", prefix="0x")
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u'0x414243'
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>>> str2hex("ABC", format=r"\x%02X")
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u'\\x41\\x42\\x43'
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"""
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if isinstance(glue, str):
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glue = unicode(glue)
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if 0 < len(prefix):
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text = [prefix]
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else:
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text = []
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for character in value:
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text.append(format % ord(character))
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return glue.join(text)
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def countBits(value):
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"""
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Count number of bits needed to store a (positive) integer number.
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>>> countBits(0)
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1
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>>> countBits(1000)
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10
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>>> countBits(44100)
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16
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>>> countBits(18446744073709551615)
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64
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"""
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assert 0 <= value
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count = 1
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bits = 1
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while (1 << bits) <= value:
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count += bits
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value >>= bits
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bits <<= 1
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while 2 <= value:
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if bits != 1:
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bits >>= 1
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else:
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bits -= 1
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while (1 << bits) <= value:
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count += bits
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value >>= bits
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return count
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def byte2bin(number, classic_mode=True):
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"""
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Convert a byte (integer in 0..255 range) to a binary string.
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If classic_mode is true (default value), reverse bits.
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>>> byte2bin(10)
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'00001010'
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>>> byte2bin(10, False)
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'01010000'
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"""
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text = ""
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for i in range(0, 8):
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if classic_mode:
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mask = 1 << (7-i)
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else:
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mask = 1 << i
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if (number & mask) == mask:
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text += "1"
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else:
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text += "0"
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return text
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def long2raw(value, endian, size=None):
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r"""
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Convert a number (positive and not nul) to a raw string.
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If size is given, add nul bytes to fill to size bytes.
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>>> long2raw(0x1219, BIG_ENDIAN)
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'\x12\x19'
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>>> long2raw(0x1219, BIG_ENDIAN, 4) # 32 bits
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'\x00\x00\x12\x19'
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>>> long2raw(0x1219, LITTLE_ENDIAN, 4) # 32 bits
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'\x19\x12\x00\x00'
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"""
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assert (not size and 0 < value) or (0 <= value)
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assert endian in (LITTLE_ENDIAN, BIG_ENDIAN)
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text = []
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while (value != 0 or text == ""):
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byte = value % 256
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text.append( chr(byte) )
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value >>= 8
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if size:
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need = max(size - len(text), 0)
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else:
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need = 0
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if need:
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if endian is BIG_ENDIAN:
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text = chain(repeat("\0", need), reversed(text))
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else:
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text = chain(text, repeat("\0", need))
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else:
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if endian is BIG_ENDIAN:
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text = reversed(text)
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return "".join(text)
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def long2bin(size, value, endian, classic_mode=False):
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"""
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Convert a number into bits (in a string):
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- size: size in bits of the number
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- value: positive (or nul) number
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- endian: BIG_ENDIAN (most important bit first)
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or LITTLE_ENDIAN (least important bit first)
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- classic_mode (default: False): reverse each packet of 8 bits
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>>> long2bin(16, 1+4 + (1+8)*256, BIG_ENDIAN)
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'10100000 10010000'
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>>> long2bin(16, 1+4 + (1+8)*256, BIG_ENDIAN, True)
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'00000101 00001001'
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>>> long2bin(16, 1+4 + (1+8)*256, LITTLE_ENDIAN)
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'00001001 00000101'
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>>> long2bin(16, 1+4 + (1+8)*256, LITTLE_ENDIAN, True)
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'10010000 10100000'
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"""
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text = ""
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assert endian in (LITTLE_ENDIAN, BIG_ENDIAN)
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assert 0 <= value
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for index in xrange(size):
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if (value & 1) == 1:
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text += "1"
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else:
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text += "0"
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value >>= 1
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if endian is LITTLE_ENDIAN:
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text = text[::-1]
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result = ""
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while len(text) != 0:
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if len(result) != 0:
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result += " "
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if classic_mode:
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result += text[7::-1]
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else:
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result += text[:8]
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text = text[8:]
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return result
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def str2bin(value, classic_mode=True):
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r"""
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Convert binary string to binary numbers.
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If classic_mode is true (default value), reverse bits.
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>>> str2bin("\x03\xFF")
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'00000011 11111111'
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>>> str2bin("\x03\xFF", False)
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'11000000 11111111'
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"""
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text = ""
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for character in value:
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if text != "":
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text += " "
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byte = ord(character)
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text += byte2bin(byte, classic_mode)
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return text
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def _createStructFormat():
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"""
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Create a dictionnary (endian, size_byte) => struct format used
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by str2long() to convert raw data to positive integer.
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"""
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format = {
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BIG_ENDIAN: {},
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LITTLE_ENDIAN: {},
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}
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for struct_format in "BHILQ":
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try:
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size = calcsize(struct_format)
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format[BIG_ENDIAN][size] = '>%s' % struct_format
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format[LITTLE_ENDIAN][size] = '<%s' % struct_format
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except struct_error:
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pass
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return format
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_struct_format = _createStructFormat()
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def str2long(data, endian):
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r"""
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Convert a raw data (type 'str') into a long integer.
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>>> chr(str2long('*', BIG_ENDIAN))
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'*'
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>>> str2long("\x00\x01\x02\x03", BIG_ENDIAN) == 0x10203
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True
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>>> str2long("\x2a\x10", LITTLE_ENDIAN) == 0x102a
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True
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>>> str2long("\xff\x14\x2a\x10", BIG_ENDIAN) == 0xff142a10
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True
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>>> str2long("\x00\x01\x02\x03", LITTLE_ENDIAN) == 0x3020100
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True
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>>> str2long("\xff\x14\x2a\x10\xab\x00\xd9\x0e", BIG_ENDIAN) == 0xff142a10ab00d90e
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True
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>>> str2long("\xff\xff\xff\xff\xff\xff\xff\xff", BIG_ENDIAN) == (2**64-1)
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True
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"""
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assert 1 <= len(data) <= 32 # arbitrary limit: 256 bits
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try:
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return unpack(_struct_format[endian][len(data)], data)[0]
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except KeyError:
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pass
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assert endian in (BIG_ENDIAN, LITTLE_ENDIAN)
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shift = 0
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value = 0
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if endian is BIG_ENDIAN:
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data = reversed(data)
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for character in data:
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byte = ord(character)
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value += (byte << shift)
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shift += 8
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return value
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