def delBuffer(rfile:ReadBinaryFileWithABuffer, wfile:WriteFile, delList:list) :
rfile.resetRead()
if len(delList) > 0:
rfile.resetRead()
startStopIndex = delList.pop(0)
startIndex = startStopIndex[0]
stopIndex = startStopIndex[1]
while True:
if rfile.getCurrent() >= rfile.file_seek_end:
break
if startIndex > rfile.getCurrent() + rfile.buffer or rfile.getCurrent() >= stopIndex:
wfile.appendByte(data=rfile.read())
else:
if rfile.getCurrent() < startIndex:
wfile.appendByte(data=readIndexBytes(filename=rfile.filename, startIndex=rfile.getCurrent(),
stopIndex=startIndex))
rfile.setCurrent(seek=stopIndex)
if len(delList) > 0:
startStopIndex = delList.pop(0)
startIndex = startStopIndex[0]
stopIndex = startStopIndex[1]
else:
wfile.appendByte(data=rfile.readIndex(stopIndex))
else:
rfile.resetRead()
while True:
bufferData=rfile.read()
if bufferData == b'':
break
wfile.writeByte(bufferData)
def deleteOneIndex(rfile:ReadBinaryFileWithABuffer, wfile:WriteFile, startIndex:int , stopIndex:int) :
rfile.resetRead()
while True:
if rfile.getCurrent() >= rfile.file_seek_end:
break
if startIndex > rfile.getCurrent()+rfile.buffer or rfile.getCurrent() >= stopIndex:
wfile.appendByte( data=rfile.read() )
else:
if rfile.getCurrent() < startIndex:
wfile.appendByte(data=readIndexBytes(filename=rfile.filename, startIndex=rfile.getCurrent(), stopIndex=startIndex))
wfile.appendByte(data=rfile.readIndex(stopIndex))
def replaceBuffer(rfile:ReadBinaryFileWithABuffer, wfile:WriteFile, searchData:bytes, replaceData:bytes) :
result=[]
searchData_length= len(searchData)
search_counter=0
counter=0
rfile.resetRead()
while True:
bufferData=rfile.read()
if bufferData == b'':
break
for ii in range(0, len(bufferData)):
if bufferData[ii:ii+1] == searchData[search_counter:search_counter+1]:
if search_counter == searchData_length-1:
result.append( counter-search_counter )
search_counter = 0
else:
search_counter += 1
else:
search_counter = 0
counter += 1
if len(result) > 0:
rfile.resetRead()
startIndex = result.pop(0)
stopIndex = startIndex + searchData_length
while True:
if rfile.getCurrent() >= rfile.file_seek_end:
break
if startIndex > rfile.getCurrent() + rfile.buffer or rfile.getCurrent() >= stopIndex:
wfile.appendByte(data=rfile.read())
else:
if rfile.getCurrent() < startIndex:
wfile.appendByte(data=readIndexBytes(filename=rfile.filename, startIndex=rfile.getCurrent(),
stopIndex=startIndex))
wfile.appendByte(data=replaceData)
rfile.setCurrent(seek=stopIndex)
if len(result)>0:
startIndex = result.pop(0)
stopIndex = startIndex + searchData_length
else:
wfile.appendByte(data=rfile.readIndex(stopIndex))
else:
rfile.resetRead()
while True:
bufferData=rfile.read()
if bufferData == b'':
break
wfile.writeByte(bufferData)