fix: windows install using pip mislocates share directory The setup code that tries to make the share install path absolute prependeds something like: c:\program files\python_venv to the paths. The equivalent on linux is recognized as an absolute path. On windows this is treated oddly. This resulted in the share files being placed in: c:\program files\python_venv\Lib\site-packages\program files\python_venv\share Roundup was unable to find the files there. On windows (where the platform starts with 'win') don't make the path absolute. This puts share in: c:\program files\python_venv\Lib\share and Roundup finds them. The translations and templates are found by the roundup-server. The docs are also installed under the share directory. The man pages are not installed as windows doesn't have groff to format the source documents. This is the second fix from issues getting Roundup running on windows discussed on mailing list by Simon Eigeldinger. Thread starts with: https://sourceforge.net/p/roundup/mailman/message/41557096/ subject: Installing Roundup on Windows 2023-10-05.

'''Set of functions of adding/checking timestamp to be used to limit
   form submission for cgi actions.
'''

import base64
import binascii
import struct
import time

from roundup.cgi.exceptions import FormError
from roundup.i18n import _
from roundup.anypy.strings import b2s, s2b


def pack_timestamp():
    return b2s(base64.b64encode(struct.pack("i", int(time.time()))).strip())


def unpack_timestamp(s):
    try:
        timestamp = struct.unpack("i", base64.b64decode(s2b(s)))[0]
    except (struct.error, binascii.Error, TypeError):
        raise FormError(_("Form is corrupted."))
    return timestamp


class Timestamped:
    def timecheck(self, field, delay):
        try:
            created = unpack_timestamp(self.form[field].value)
        except KeyError:
            raise FormError(_("Form is corrupted, missing: %s." % field))
        if time.time() - created < delay:
            raise FormError(_("Responding to form too quickly."))
        return True