# Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A\B.
# Previously, this function also truncated pathnames to 8+3 format,
# but as this module is called "ntpath", that's obviously wrong!

def normpath(path):
    """Normalize path, eliminating double slashes, etc."""
    path = path.replace("/", "\\")
    prefix, path = os.path.splitdrive(path)
    if prefix == '':
        max_leading = 2
    else:
        max_leading = 1
    i = 0
    while path[:1] == "\\":
        if i < max_leading:
            prefix = prefix + "\\"
            i += 1
        path = path[1:]
    comps = path.split("\\")
    i = 0
    while i < len(comps):
        if comps[i] in ('.', ''):
            del comps[i]
        elif comps[i] == '..':
            if i > 0 and comps[i-1] != '..':
                del comps[i-1:i+1]
                i -= 1
            elif i == 0 and prefix.endswith("\\"):
                del comps[i]
            else:
                i += 1
        else:
            i += 1
    # If the path is now empty, substitute '.'
    if not prefix and not comps:
        comps.append('.')
    return prefix + "\\".join(comps)