projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 3257aa99 DM |
1 | """ Python 'utf-16' Codec\r |
| 2 | \r | |
| 3 | \r | |
| 4 | Written by Marc-Andre Lemburg (mal@lemburg.com).\r | |
| 5 | \r | |
| 6 | (c) Copyright CNRI, All Rights Reserved. NO WARRANTY.\r | |
| 7 | \r | |
| 8 | """\r | |
| 9 | import codecs, sys\r | |
| 10 | \r | |
| 11 | ### Codec APIs\r | |
| 12 | \r | |
| 13 | encode = codecs.utf_16_encode\r | |
| 14 | \r | |
| 15 | def decode(input, errors='strict'):\r | |
| 16 | return codecs.utf_16_decode(input, errors, True)\r | |
| 17 | \r | |
| 18 | class IncrementalEncoder(codecs.IncrementalEncoder):\r | |
| 19 | def __init__(self, errors='strict'):\r | |
| 20 | codecs.IncrementalEncoder.__init__(self, errors)\r | |
| 21 | self.encoder = None\r | |
| 22 | \r | |
| 23 | def encode(self, input, final=False):\r | |
| 24 | if self.encoder is None:\r | |
| 25 | result = codecs.utf_16_encode(input, self.errors)[0]\r | |
| 26 | if sys.byteorder == 'little':\r | |
| 27 | self.encoder = codecs.utf_16_le_encode\r | |
| 28 | else:\r | |
| 29 | self.encoder = codecs.utf_16_be_encode\r | |
| 30 | return result\r | |
| 31 | return self.encoder(input, self.errors)[0]\r | |
| 32 | \r | |
| 33 | def reset(self):\r | |
| 34 | codecs.IncrementalEncoder.reset(self)\r | |
| 35 | self.encoder = None\r | |
| 36 | \r | |
| 37 | def getstate(self):\r | |
| 38 | # state info we return to the caller:\r | |
| 39 | # 0: stream is in natural order for this platform\r | |
| 40 | # 2: endianness hasn't been determined yet\r | |
| 41 | # (we're never writing in unnatural order)\r | |
| 42 | return (2 if self.encoder is None else 0)\r | |
| 43 | \r | |
| 44 | def setstate(self, state):\r | |
| 45 | if state:\r | |
| 46 | self.encoder = None\r | |
| 47 | else:\r | |
| 48 | if sys.byteorder == 'little':\r | |
| 49 | self.encoder = codecs.utf_16_le_encode\r | |
| 50 | else:\r | |
| 51 | self.encoder = codecs.utf_16_be_encode\r | |
| 52 | \r | |
| 53 | class IncrementalDecoder(codecs.BufferedIncrementalDecoder):\r | |
| 54 | def __init__(self, errors='strict'):\r | |
| 55 | codecs.BufferedIncrementalDecoder.__init__(self, errors)\r | |
| 56 | self.decoder = None\r | |
| 57 | \r | |
| 58 | def _buffer_decode(self, input, errors, final):\r | |
| 59 | if self.decoder is None:\r | |
| 60 | (output, consumed, byteorder) = \\r | |
| 61 | codecs.utf_16_ex_decode(input, errors, 0, final)\r | |
| 62 | if byteorder == -1:\r | |
| 63 | self.decoder = codecs.utf_16_le_decode\r | |
| 64 | elif byteorder == 1:\r | |
| 65 | self.decoder = codecs.utf_16_be_decode\r | |
| 66 | elif consumed >= 2:\r | |
| 67 | raise UnicodeError("UTF-16 stream does not start with BOM")\r | |
| 68 | return (output, consumed)\r | |
| 69 | return self.decoder(input, self.errors, final)\r | |
| 70 | \r | |
| 71 | def reset(self):\r | |
| 72 | codecs.BufferedIncrementalDecoder.reset(self)\r | |
| 73 | self.decoder = None\r | |
| 74 | \r | |
| 75 | class StreamWriter(codecs.StreamWriter):\r | |
| 76 | def __init__(self, stream, errors='strict'):\r | |
| 77 | codecs.StreamWriter.__init__(self, stream, errors)\r | |
| 78 | self.encoder = None\r | |
| 79 | \r | |
| 80 | def reset(self):\r | |
| 81 | codecs.StreamWriter.reset(self)\r | |
| 82 | self.encoder = None\r | |
| 83 | \r | |
| 84 | def encode(self, input, errors='strict'):\r | |
| 85 | if self.encoder is None:\r | |
| 86 | result = codecs.utf_16_encode(input, errors)\r | |
| 87 | if sys.byteorder == 'little':\r | |
| 88 | self.encoder = codecs.utf_16_le_encode\r | |
| 89 | else:\r | |
| 90 | self.encoder = codecs.utf_16_be_encode\r | |
| 91 | return result\r | |
| 92 | else:\r | |
| 93 | return self.encoder(input, errors)\r | |
| 94 | \r | |
| 95 | class StreamReader(codecs.StreamReader):\r | |
| 96 | \r | |
| 97 | def reset(self):\r | |
| 98 | codecs.StreamReader.reset(self)\r | |
| 99 | try:\r | |
| 100 | del self.decode\r | |
| 101 | except AttributeError:\r | |
| 102 | pass\r | |
| 103 | \r | |
| 104 | def decode(self, input, errors='strict'):\r | |
| 105 | (object, consumed, byteorder) = \\r | |
| 106 | codecs.utf_16_ex_decode(input, errors, 0, False)\r | |
| 107 | if byteorder == -1:\r | |
| 108 | self.decode = codecs.utf_16_le_decode\r | |
| 109 | elif byteorder == 1:\r | |
| 110 | self.decode = codecs.utf_16_be_decode\r | |
| 111 | elif consumed>=2:\r | |
| 112 | raise UnicodeError,"UTF-16 stream does not start with BOM"\r | |
| 113 | return (object, consumed)\r | |
| 114 | \r | |
| 115 | ### encodings module API\r | |
| 116 | \r | |
| 117 | def getregentry():\r | |
| 118 | return codecs.CodecInfo(\r | |
| 119 | name='utf-16',\r | |
| 120 | encode=encode,\r | |
| 121 | decode=decode,\r | |
| 122 | incrementalencoder=IncrementalEncoder,\r | |
| 123 | incrementaldecoder=IncrementalDecoder,\r | |
| 124 | streamreader=StreamReader,\r | |
| 125 | streamwriter=StreamWriter,\r | |
| 126 | )\r |