Module codec 

ISCC codec: type enums, header encoding/decoding, base32, and component encoding.

Provides the foundational encoding primitives that all gen_*_v0 functions depend on to produce ISCC-encoded output strings. This is a Tier 2 module — available to Rust consumers but not exposed through FFI bindings.

Enums

MainType

ISCC MainType identifier.

SubType

ISCC SubType identifier.

Version

ISCC version identifier.

Functions

decode_base32

Decode base32 string to bytes (case-insensitive, no padding expected).

decode_header

Decode ISCC header from bytes.

decode_length

Decode header length field to actual bit length.

decode_units

Decode a unit combination index (0–7) to a sorted list of optional MainTypes.

encode_base32

Encode bytes as base32 (RFC 4648, uppercase, no padding).

encode_base64

Encode bytes as base64url (RFC 4648 §5, no padding).

encode_component

Encode an ISCC-UNIT with header and body as a base32 string.

encode_header

Encode ISCC header fields into bytes.

encode_length

Encode bit length to header length field value.

encode_units

Encode optional ISCC-UNIT MainTypes as a unit combination index (0–7).

iscc_decompose

Decompose a composite ISCC-CODE or ISCC sequence into individual ISCC-UNITs.