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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | # Copyright 2016 The Brotli Authors. All rights reserved.
#
# Distributed under MIT license.
# See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
"""Functions to compress and decompress data using the Brotli library."""
import _brotli
# The library version.
__version__ = _brotli.__version__
# The compression mode.
MODE_GENERIC = _brotli.MODE_GENERIC
MODE_TEXT = _brotli.MODE_TEXT
MODE_FONT = _brotli.MODE_FONT
# The Compressor object.
Compressor = _brotli.Compressor
# The Decompressor object.
Decompressor = _brotli.Decompressor
# Compress a byte string.
def compress(string, mode=MODE_GENERIC, quality=11, lgwin=22, lgblock=0):
"""Compress a byte string.
Args:
string (bytes): The input data.
mode (int, optional): The compression mode can be MODE_GENERIC (default),
MODE_TEXT (for UTF-8 format text input) or MODE_FONT (for WOFF 2.0).
quality (int, optional): Controls the compression-speed vs compression-
density tradeoff. The higher the quality, the slower the compression.
Range is 0 to 11. Defaults to 11.
lgwin (int, optional): Base 2 logarithm of the sliding window size. Range
is 10 to 24. Defaults to 22.
lgblock (int, optional): Base 2 logarithm of the maximum input block size.
Range is 16 to 24. If set to 0, the value will be set based on the
quality. Defaults to 0.
Returns:
The compressed byte string.
Raises:
brotli.error: If arguments are invalid, or compressor fails.
"""
compressor = Compressor(mode=mode, quality=quality, lgwin=lgwin,
lgblock=lgblock)
return compressor.process(string) + compressor.finish()
# Decompress a compressed byte string.
decompress = _brotli.decompress
# Raised if compression or decompression fails.
error = _brotli.error
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