def write_zero_fill(file_handle, write_length):
# Bytearray will be initialized with null bytes as part of constructor.
# Bytearray는 null 바이트로 초기화
# Write_length는 쓸 바이트 수
fill_string = bytearray(write_buf_size)
assert len(fill_string) == write_buf_size
# Loop and perform writes of write_buf_size bytes or less.
# Continue until write_length bytes have been written.
# There is no need to explicitly move the file pointer while
# writing. We are writing contiguously.
# write_buf_size 바이트 이하의 쓰기를 반복
# write_length byte가 작성될 때까지 계속합니다.
while write_length > 0:
if write_length >= write_buf_size:
write_string = fill_string
write_length -= write_buf_size
else:
write_string = fill_string[:write_length]
write_length = 0
# Write buffer to file.
#logger.debug("Write %d bytes", len(write_string))
#파일에 버퍼작성
_, bytes_written = WriteFile(file_handle, write_string)
assert bytes_written == len(write_string)
FlushFileBuffers(file_handle)
def truncate_file(file_handle):
SetFilePointer(file_handle, 0, FILE_BEGIN)
SetEndOfFile(file_handle)
FlushFileBuffers(file_handle)
def _pipe_write(self, buf):
log("pipe_write: %s", binascii.hexlify(buf))
WriteFile(self.pipe_handle, buf)
FlushFileBuffers(self.pipe_handle)
#SetFilePointer(self.pipe_handle, 0, FILE_BEGIN)
return len(buf)