‘tz’ parameter can be received using Mathematical AND (&) Mathematical OR (|) bit operations.
For example, it is necessary to receive ‘tz’ parameter for the Azores time zone (-01:00), dst - none(0x08000000).
1. Mathematical AND should be applied to the Azores timezone using 0xf000ffff mask.
-3600 & 0xf000ffff -268373520
2. Mathematical OR should be applied to the result using the mask corresponding to the dst.
-268373520 | 0x8000000 -134155792
tz=-134155792
tz=-134155792
1) Mathematical AND should be applied to the ‘tz’ parameter using 0xffff mask.
-134155792 & 0xffff 61936
2) Mathematical OR should be applied to the result using the mask 0xffff0000.
61936 | 0xffff0000 -3600
timezone (-01:00) Azores.
tz=-134155792 in hex 0xf800f1f0
Value using 0x0fff0000 mask is dst. 0x08000000 - none.