From BCD

Category: Encoding

Status: Registered and callable in the CyberChef 11.3.0 compatibility inventory.

Input / output: string → BigNumber

Background: https://wikipedia.org/wiki/Binary-coded_decimal

What it does

Binary-Coded Decimal (BCD) is a class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, usually four or eight. Special bit patterns are sometimes used for a sign.

Note

Status here means the operation name is implemented and callable. It does not by itself promise byte-for-byte parity for every upstream option. See Compatibility and current status for the verified scope and known boundaries.

Arguments and options

Arguments are positional. Keep their order when using bake() or Pipeline.then().

Index	Name	UI type	PyChef default	Accepted values / format
`0`	Scheme	`option`	`'8 4 2 1'`	`'8 4 2 1'`, `'7 4 2 1'`, `'4 2 2 1'`, `'2 4 2 1'`, `'8 4 -2 -1'`, `'Excess-3'`, `'IBM 8 4 2 1'`
`1`	Packed	`boolean`	`True`	`True` or `False`
`2`	Signed	`boolean`	`False`	`True` or `False`
`3`	Input format	`option`	`'Nibbles'`	`'Nibbles'`, `'Bytes'`, `'Raw'`

Recipe template

Important

This is a call template built from the documented defaults. Replace placeholder values such as empty keys, paths, patterns, or lookup data before running it.

from pychef import bake

input_value = "example"
args = ['8 4 2 1', True, False, 'Nibbles']
result = bake(input_value, [{"op": 'From BCD', "args": args}])
print(result)

Pipeline example

from pychef import Pipeline

args = ['8 4 2 1', True, False, 'Nibbles']
transform = Pipeline().then('From BCD', *args)
result = transform("example")

Dedicated operation module

The registered entry point lives in pychef.operations.by_operation.from_bcd. Direct calls receive the input value and a positional argument tuple:

from pychef.operations.by_operation.from_bcd import run

result = run("example", tuple(['8 4 2 1', True, False, 'Nibbles']))

pychef.operations.by_operation.from_bcd.run(value, args)

Run this operation using its shared internal implementation.

Parameters:

value (str | bytes)
args (Sequence[Any])

Return type:

str | bytes