Module bcd 

Binary-coded decimal (BCD) codec for DVB wire fields.

DVB packs many numeric fields as BCD — each 4-bit nibble holds one decimal digit (0–9). Examples: the HHMMSS of a UTC time, the frequency / symbol-rate of the delivery-system descriptors, the HHMM of a local-time offset. These helpers convert between the packed BCD representation and plain integers in both directions so callers never hand-decode nibbles.

Every decode has a symmetric encode; both reject out-of-range input by returning None rather than producing garbage.

Constants

MAX_NIBBLES

Largest number of BCD nibbles representable in the bcd_to_decimal / decimal_to_bcd u64 carrier.

Functions

bcd_to_decimal

Decode the low nibbles BCD digits of raw to a decimal value.

decimal_to_bcd

Encode value as nibbles packed-BCD digits in the low bits of a u64.

from_bcd_byte

Decode a packed-BCD byte (two nibbles) to 0..=99.

to_bcd_byte

Encode 0..=99 to a packed-BCD byte.