PyTouhou: pytouhou/formats/pbg3.py annotate

annotate pytouhou/formats/pbg3.py @ 617:a6af3ff86612

Change all “void except *” function into “bint except True”, to prevent PyErr_Occurred() from being called at each call.

author	Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date	Sun, 29 Mar 2015 00:08:20 +0100
parents	d1f0bb0b7a17
children	d18c0bf11138

rev	line source
52 ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	1 # -- encoding: utf-8 --
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	2 ##
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	3 ## Copyright (C) 2011 Thibaut Girka <thib@sitedethib.com>
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	4 ##
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	5 ## This program is free software; you can redistribute it and/or modify
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	6 ## it under the terms of the GNU General Public License as published
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	7 ## by the Free Software Foundation; version 3 only.
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	8 ##
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	9 ## This program is distributed in the hope that it will be useful,
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	12 ## GNU General Public License for more details.
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	13 ##
ab826bc29aa2 Add some documentation, GPLv3 headers, README and COPYING file. Thibaut Girka <thib@sitedethib.com> parents: 0 diff changeset	14
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	15 """PBG3 archive files handling.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	16
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	17 This module provides classes for handling the PBG3 file format.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	18 The PBG3 format is the archive format used by Touhou: EoSD.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	19
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	20 PBG3 files are merely a bitstream composed of a header,
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	21 a file table, and LZSS-compressed files.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	22 """
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	23
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	24 from collections import namedtuple
536 6b76c9ba3975 Make archives return files by default, instead of bytes. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 490 diff changeset	25 from io import BytesIO
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	26
58 3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	27 from pytouhou.utils.bitstream import BitStream
490 1b532e7dd521 Decrease PBG3 loading time by improving lzss and bitstream integration. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 377 diff changeset	28 from pytouhou.utils import lzss
58 3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	29
3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	30 from pytouhou.utils.helpers import get_logger
3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	31
377 70e2ed71b09c Add meaningful exceptions in format parsing. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 252 diff changeset	32 from pytouhou.formats import WrongFormatError
70e2ed71b09c Add meaningful exceptions in format parsing. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 252 diff changeset	33
58 3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	34 logger = get_logger(__name__)
3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	35
3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	36
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	37 class PBG3BitStream(BitStream):
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	38 """Helper class to handle strings and integers in PBG3 bitstreams."""
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	39
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	40 def read_int(self):
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	41 """Read an integer from the bitstream.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	42
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	43 Integers have variable sizes. They begin with a two-bit value indicating
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	44 the number of (non-aligned) bytes to read.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	45 """
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	46
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	47 size = self.read(2)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	48 return self.read((size + 1) * 8)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	49
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	50
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	51 def read_string(self, maxsize):
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	52 """Read a string from the bitstream.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	53
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	54 Strings are stored as standard NULL-termianted sequences of bytes.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	55 The only catch is that they are not byte-aligned.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	56 """
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	57
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	58 string = []
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	59 for i in range(maxsize):
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	60 byte = self.read(8)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	61 if byte == 0:
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	62 break
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	63 string.append(byte)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	64 return ''.join(chr(byte) for byte in string)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	65
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	66
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	67
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	68 PBG3Entry = namedtuple('PBG3Entry', 'unknown1 unknown2 checksum offset size')
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	69
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	70
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	71
615 d1f0bb0b7a17 Don’t inherit explicitely from object, we are not on Python 2.7 anymore. :) Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 590 diff changeset	72 class PBG3:
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	73 """Handle PBG3 archive files.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	74
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	75 PBG3 is a file archive format used in Touhou 6: EoSD.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	76 This class provides a representation of such files, as well as functions to
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	77 read and extract files from a PBG3 archive.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	78
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	79 Instance variables:
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	80 entries -- list of PBG3Entry objects describing files present in the archive
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	81 bitstream -- PBG3BitStream object
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	82 """
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	83
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	84 def __init__(self, entries=None, bitstream=None):
252 b5c7369abd7c Improve data reading perfs Thibaut Girka <thib@sitedethib.com> parents: 204 diff changeset	85 self.entries = entries or {}
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	86 self.bitstream = bitstream #TODO
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	87
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	88
97 ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	89 def __enter__(self):
ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	90 return self
ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	91
ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	92
ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	93 def __exit__(self, type, value, traceback):
ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	94 return self.bitstream.__exit__(type, value, traceback)
ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	95
ac2e5e1c2c3c Refactor \o/ Thibaut Girka <thib@sitedethib.com> parents: 58 diff changeset	96
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	97 @classmethod
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	98 def read(cls, file):
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	99 """Read a PBG3 file.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	100
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	101 Raise an exception if the file is invalid.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	102 Return a PBG3 instance otherwise.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	103 """
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	104
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	105 magic = file.read(4)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	106 if magic != b'PBG3':
377 70e2ed71b09c Add meaningful exceptions in format parsing. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 252 diff changeset	107 raise WrongFormatError(magic)
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	108
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	109 bitstream = PBG3BitStream(file)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	110 entries = {}
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	111
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	112 nb_entries = bitstream.read_int()
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	113 offset = bitstream.read_int()
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	114 bitstream.seek(offset)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	115 for i in range(nb_entries):
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	116 unknown1 = bitstream.read_int()
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	117 unknown2 = bitstream.read_int()
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	118 checksum = bitstream.read_int() # Checksum of compressed data
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	119 offset = bitstream.read_int()
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	120 size = bitstream.read_int()
590 e15672733c93 Switch to Python 3.x instead of 2.7. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 536 diff changeset	121 name = bitstream.read_string(255)
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	122 entries[name] = PBG3Entry(unknown1, unknown2, checksum, offset, size)
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	123
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	124 return PBG3(entries, bitstream)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	125
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	126
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	127 def list_files(self):
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	128 """List files present in the archive."""
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	129 return self.entries.keys()
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	130
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	131
536 6b76c9ba3975 Make archives return files by default, instead of bytes. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 490 diff changeset	132 def get_file(self, filename, check=False):
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	133 """Extract a given file.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	134
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	135 If “filename” is in the archive, extract it and return its contents.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	136 Otherwise, raise an exception.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	137
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	138 By default, the checksum of the file won't be verified,
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	139 you can however force the verification using the “check” argument.
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	140 """
88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	141
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	142 unkwn1, unkwn2, checksum, offset, size = self.entries[filename]
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	143 self.bitstream.seek(offset)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	144 data = lzss.decompress(self.bitstream, size)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	145 if check:
204 88361534c77e Add some documentation (argh, so much left to document!) Thibaut Girka <thib@sitedethib.com> parents: 97 diff changeset	146 # Verify the checksum
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	147 compressed_size = self.bitstream.io.tell() - offset
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	148 self.bitstream.seek(offset)
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	149 value = 0
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	150 for c in self.bitstream.io.read(compressed_size):
590 e15672733c93 Switch to Python 3.x instead of 2.7. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 536 diff changeset	151 value += c
0 6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	152 value &= 0xFFFFFFFF
6b2c7af2384c Hello Gensokyo _o/ Thibaut Girka <thib@sitedethib.com> parents: diff changeset	153 if value != checksum:
58 3da4de9decd0 Use logging module Thibaut Girka <thib@sitedethib.com> parents: 52 diff changeset	154 logger.warn('corrupted data!')
536 6b76c9ba3975 Make archives return files by default, instead of bytes. Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> parents: 490 diff changeset	155 return BytesIO(data)

Mercurial > touhou

annotate pytouhou/formats/pbg3.py @ 617:a6af3ff86612