def ftruncate_win32(fd, size):
curpos = os.lseek(fd, 0, 1)
try:
# move to the position to be truncated
os.lseek(fd, size, 0)
# Truncate. Note that this may grow the file!
handle = get_osfhandle(fd)
if not SetEndOfFile(handle):
raise OSError(GetLastError_saved(), "Could not truncate file")
finally:
# we restore the file pointer position in any case
os.lseek(fd, curpos, 0)
def getwinerror(space, code=-1):
from rpython.rlib.rwin32 import GetLastError_saved, FormatError
if code == -1:
code = GetLastError_saved()
message = FormatError(code)
return space.newtuple([space.wrap(code), space.wrap(message)])