projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 3257aa99 DM |
1 | """\r |
| 2 | Python 'utf-32' Codec\r | |
| 3 | """\r | |
| 4 | import codecs, sys\r | |
| 5 | \r | |
| 6 | ### Codec APIs\r | |
| 7 | \r | |
| 8 | encode = codecs.utf_32_encode\r | |
| 9 | \r | |
| 10 | def decode(input, errors='strict'):\r | |
| 11 | return codecs.utf_32_decode(input, errors, True)\r | |
| 12 | \r | |
| 13 | class IncrementalEncoder(codecs.IncrementalEncoder):\r | |
| 14 | def __init__(self, errors='strict'):\r | |
| 15 | codecs.IncrementalEncoder.__init__(self, errors)\r | |
| 16 | self.encoder = None\r | |
| 17 | \r | |
| 18 | def encode(self, input, final=False):\r | |
| 19 | if self.encoder is None:\r | |
| 20 | result = codecs.utf_32_encode(input, self.errors)[0]\r | |
| 21 | if sys.byteorder == 'little':\r | |
| 22 | self.encoder = codecs.utf_32_le_encode\r | |
| 23 | else:\r | |
| 24 | self.encoder = codecs.utf_32_be_encode\r | |
| 25 | return result\r | |
| 26 | return self.encoder(input, self.errors)[0]\r | |
| 27 | \r | |
| 28 | def reset(self):\r | |
| 29 | codecs.IncrementalEncoder.reset(self)\r | |
| 30 | self.encoder = None\r | |
| 31 | \r | |
| 32 | def getstate(self):\r | |
| 33 | # state info we return to the caller:\r | |
| 34 | # 0: stream is in natural order for this platform\r | |
| 35 | # 2: endianness hasn't been determined yet\r | |
| 36 | # (we're never writing in unnatural order)\r | |
| 37 | return (2 if self.encoder is None else 0)\r | |
| 38 | \r | |
| 39 | def setstate(self, state):\r | |
| 40 | if state:\r | |
| 41 | self.encoder = None\r | |
| 42 | else:\r | |
| 43 | if sys.byteorder == 'little':\r | |
| 44 | self.encoder = codecs.utf_32_le_encode\r | |
| 45 | else:\r | |
| 46 | self.encoder = codecs.utf_32_be_encode\r | |
| 47 | \r | |
| 48 | class IncrementalDecoder(codecs.BufferedIncrementalDecoder):\r | |
| 49 | def __init__(self, errors='strict'):\r | |
| 50 | codecs.BufferedIncrementalDecoder.__init__(self, errors)\r | |
| 51 | self.decoder = None\r | |
| 52 | \r | |
| 53 | def _buffer_decode(self, input, errors, final):\r | |
| 54 | if self.decoder is None:\r | |
| 55 | (output, consumed, byteorder) = \\r | |
| 56 | codecs.utf_32_ex_decode(input, errors, 0, final)\r | |
| 57 | if byteorder == -1:\r | |
| 58 | self.decoder = codecs.utf_32_le_decode\r | |
| 59 | elif byteorder == 1:\r | |
| 60 | self.decoder = codecs.utf_32_be_decode\r | |
| 61 | elif consumed >= 4:\r | |
| 62 | raise UnicodeError("UTF-32 stream does not start with BOM")\r | |
| 63 | return (output, consumed)\r | |
| 64 | return self.decoder(input, self.errors, final)\r | |
| 65 | \r | |
| 66 | def reset(self):\r | |
| 67 | codecs.BufferedIncrementalDecoder.reset(self)\r | |
| 68 | self.decoder = None\r | |
| 69 | \r | |
| 70 | def getstate(self):\r | |
| 71 | # additonal state info from the base class must be None here,\r | |
| 72 | # as it isn't passed along to the caller\r | |
| 73 | state = codecs.BufferedIncrementalDecoder.getstate(self)[0]\r | |
| 74 | # additional state info we pass to the caller:\r | |
| 75 | # 0: stream is in natural order for this platform\r | |
| 76 | # 1: stream is in unnatural order\r | |
| 77 | # 2: endianness hasn't been determined yet\r | |
| 78 | if self.decoder is None:\r | |
| 79 | return (state, 2)\r | |
| 80 | addstate = int((sys.byteorder == "big") !=\r | |
| 81 | (self.decoder is codecs.utf_32_be_decode))\r | |
| 82 | return (state, addstate)\r | |
| 83 | \r | |
| 84 | def setstate(self, state):\r | |
| 85 | # state[1] will be ignored by BufferedIncrementalDecoder.setstate()\r | |
| 86 | codecs.BufferedIncrementalDecoder.setstate(self, state)\r | |
| 87 | state = state[1]\r | |
| 88 | if state == 0:\r | |
| 89 | self.decoder = (codecs.utf_32_be_decode\r | |
| 90 | if sys.byteorder == "big"\r | |
| 91 | else codecs.utf_32_le_decode)\r | |
| 92 | elif state == 1:\r | |
| 93 | self.decoder = (codecs.utf_32_le_decode\r | |
| 94 | if sys.byteorder == "big"\r | |
| 95 | else codecs.utf_32_be_decode)\r | |
| 96 | else:\r | |
| 97 | self.decoder = None\r | |
| 98 | \r | |
| 99 | class StreamWriter(codecs.StreamWriter):\r | |
| 100 | def __init__(self, stream, errors='strict'):\r | |
| 101 | self.encoder = None\r | |
| 102 | codecs.StreamWriter.__init__(self, stream, errors)\r | |
| 103 | \r | |
| 104 | def reset(self):\r | |
| 105 | codecs.StreamWriter.reset(self)\r | |
| 106 | self.encoder = None\r | |
| 107 | \r | |
| 108 | def encode(self, input, errors='strict'):\r | |
| 109 | if self.encoder is None:\r | |
| 110 | result = codecs.utf_32_encode(input, errors)\r | |
| 111 | if sys.byteorder == 'little':\r | |
| 112 | self.encoder = codecs.utf_32_le_encode\r | |
| 113 | else:\r | |
| 114 | self.encoder = codecs.utf_32_be_encode\r | |
| 115 | return result\r | |
| 116 | else:\r | |
| 117 | return self.encoder(input, errors)\r | |
| 118 | \r | |
| 119 | class StreamReader(codecs.StreamReader):\r | |
| 120 | \r | |
| 121 | def reset(self):\r | |
| 122 | codecs.StreamReader.reset(self)\r | |
| 123 | try:\r | |
| 124 | del self.decode\r | |
| 125 | except AttributeError:\r | |
| 126 | pass\r | |
| 127 | \r | |
| 128 | def decode(self, input, errors='strict'):\r | |
| 129 | (object, consumed, byteorder) = \\r | |
| 130 | codecs.utf_32_ex_decode(input, errors, 0, False)\r | |
| 131 | if byteorder == -1:\r | |
| 132 | self.decode = codecs.utf_32_le_decode\r | |
| 133 | elif byteorder == 1:\r | |
| 134 | self.decode = codecs.utf_32_be_decode\r | |
| 135 | elif consumed>=4:\r | |
| 136 | raise UnicodeError,"UTF-32 stream does not start with BOM"\r | |
| 137 | return (object, consumed)\r | |
| 138 | \r | |
| 139 | ### encodings module API\r | |
| 140 | \r | |
| 141 | def getregentry():\r | |
| 142 | return codecs.CodecInfo(\r | |
| 143 | name='utf-32',\r | |
| 144 | encode=encode,\r | |
| 145 | decode=decode,\r | |
| 146 | incrementalencoder=IncrementalEncoder,\r | |
| 147 | incrementaldecoder=IncrementalDecoder,\r | |
| 148 | streamreader=StreamReader,\r | |
| 149 | streamwriter=StreamWriter,\r | |
| 150 | )\r |