def _regenDCTX(self): """ Regenerate the decompression context. """ try: lz4f.freeDecompContext(self.dCtx) del self.dCtx self.dCtx = lz4f.createDecompContext() frameInfo = lz4f.getFrameInfo(self.header, self.dCtx) lz4f.disableChecksum(self.dCtx) except AttributeError: self.dCtx = lz4f.createDecompContext() frameInfo = lz4f.getFrameInfo(self.header, self.dCtx) pass del frameInfo
def test_3_prefs(self): cCtx = lz4f.createCompContext() dCtx = lz4f.createDecompContext() prefs = lz4f.makePrefs(5) header = lz4f.compressBegin(cCtx, prefs) frameInfo = lz4f.getFrameInfo(header, dCtx) self.assertEqual(5, frameInfo.get('blkSize'))
def __init__(self, name, fileObj=None, seekable=True): parseMagic = lambda x: binascii.hexlify(x[:4]) self.name = name self.pos = 0 self.blkDict = {} self.curBlk = 0 if fileObj: self.fileObj = fileObj self.compEnd = self.tell_end() else: return open(name) self.header = fileObj.read(7) if parseMagic(self.header) == b'04224d18': self.dCtx = lz4f.createDecompContext() self.fileInfo = lz4f.getFrameInfo(self.header, self.dCtx) self.blkSizeID = self.fileInfo.get('blkSize') else: raise IOError if seekable: try: self.load_blocks() except Exception as e: logger.error('Exception %s' % e) logger.info(traceback.format_exc()) print('Unable to load blockDict. Possibly not a lz4 file.') raise IOError
def getFileInfo(name): """ :type string: name - name of file to examine Returns a dict object containing the file's header information. """ if not os.path.exists(name): print('Unable to locate the file') return dCtx = lz4f.createDecompContext() with __builtin__.open(name, 'rb') as inFile: header = inFile.read(7) return lz4f.getFrameInfo(header, dCtx)
def __init__(self, name, fileObj=None, seekable=True): self.name = name if fileObj: self.fileObj = fileObj self.compEnd = self.tell_end() else: return open(name) self.dCtx = lz4f.createDecompContext() self.header = fileObj.read(7) self.fileInfo = lz4f.getFrameInfo(self.header, self.dCtx) self.blkSizeID = self.fileInfo.get('blkSize') if seekable: try: self.load_blocks() except: print('Unable to load blockDict. Possibly not a lz4 file.') raise
def __init__(self, name, fileObj=None, seekable=True): self.name = name if fileObj is None: self.fileObj = open(name, 'rb') else: self.fileObj = fileObj self.compEnd = self.tell_end() self.header = self.fileObj.read(7) if binascii.hexlify(self.header[:4]) == b'04224d18': self.dCtx = lz4f.createDecompContext() self.fileInfo = lz4f.getFrameInfo(self.header, self.dCtx) self.blkSizeID = self.fileInfo.get('blkSize') else: raise IOError('Bad header or not supported header') if seekable: self.load_blocks()
def __init__(self, name, fileObj=None, seekable=True): parseMagic = lambda x: binascii.hexlify(x[:4]) self.name = name if fileObj: self.fileObj = fileObj self.compEnd = self.tell_end() else: return open(name) self.header = fileObj.read(7) if parseMagic(self.header) == b'04224d18': self.dCtx = lz4f.createDecompContext() self.fileInfo = lz4f.getFrameInfo(self.header, self.dCtx) self.blkSizeID = self.fileInfo.get('blkSize') else: raise IOError if seekable: try: self.load_blocks() except: print('Unable to load blockDict. Possibly not a lz4r file.') raise IOError
def __init__(self, name, fileObj=None, seekable=True): parseMagic = lambda x: binascii.hexlify(x[:4]) self.name = name if fileObj: self.fileObj = fileObj self.compEnd = self.tell_end() else: self.fileObj = _open(name) self.compEnd = self.tell_end() self.header = fileObj.read(7) if parseMagic(self.header) == b'04224d18': self.dCtx = lz4f.createDecompContext() self.fileInfo = lz4f.getFrameInfo(self.header, self.dCtx) self.blkSizeID = self.fileInfo.get('blkSize') else: raise IOError if seekable: try: self.load_blocks() except: print('Unable to load blockDict. Possibly not a lz4 file.') raise IOError