projects / OpenSPARC-T2-DV / blame
| Commit | Line | Data |
|---|---|---|
| 86530b38 AT |
1 | """ Python 'bz2_codec' Codec - bz2 compression encoding |
| 2 | ||
| 3 | Unlike most of the other codecs which target Unicode, this codec | |
| 4 | will return Python string objects for both encode and decode. | |
| 5 | ||
| 6 | Adapted by Raymond Hettinger from zlib_codec.py which was written | |
| 7 | by Marc-Andre Lemburg (mal@lemburg.com). | |
| 8 | ||
| 9 | """ | |
| 10 | import codecs | |
| 11 | import bz2 # this codec needs the optional bz2 module ! | |
| 12 | ||
| 13 | ### Codec APIs | |
| 14 | ||
| 15 | def bz2_encode(input,errors='strict'): | |
| 16 | ||
| 17 | """ Encodes the object input and returns a tuple (output | |
| 18 | object, length consumed). | |
| 19 | ||
| 20 | errors defines the error handling to apply. It defaults to | |
| 21 | 'strict' handling which is the only currently supported | |
| 22 | error handling for this codec. | |
| 23 | ||
| 24 | """ | |
| 25 | assert errors == 'strict' | |
| 26 | output = bz2.compress(input) | |
| 27 | return (output, len(input)) | |
| 28 | ||
| 29 | def bz2_decode(input,errors='strict'): | |
| 30 | ||
| 31 | """ Decodes the object input and returns a tuple (output | |
| 32 | object, length consumed). | |
| 33 | ||
| 34 | input must be an object which provides the bf_getreadbuf | |
| 35 | buffer slot. Python strings, buffer objects and memory | |
| 36 | mapped files are examples of objects providing this slot. | |
| 37 | ||
| 38 | errors defines the error handling to apply. It defaults to | |
| 39 | 'strict' handling which is the only currently supported | |
| 40 | error handling for this codec. | |
| 41 | ||
| 42 | """ | |
| 43 | assert errors == 'strict' | |
| 44 | output = bz2.decompress(input) | |
| 45 | return (output, len(input)) | |
| 46 | ||
| 47 | class Codec(codecs.Codec): | |
| 48 | ||
| 49 | def encode(self, input, errors='strict'): | |
| 50 | return bz2_encode(input, errors) | |
| 51 | def decode(self, input, errors='strict'): | |
| 52 | return bz2_decode(input, errors) | |
| 53 | ||
| 54 | class StreamWriter(Codec,codecs.StreamWriter): | |
| 55 | pass | |
| 56 | ||
| 57 | class StreamReader(Codec,codecs.StreamReader): | |
| 58 | pass | |
| 59 | ||
| 60 | ### encodings module API | |
| 61 | ||
| 62 | def getregentry(): | |
| 63 | ||
| 64 | return (bz2_encode,bz2_decode,StreamReader,StreamWriter) |