lengthcodec

Documentation

Overview

Package lengthcodec implements the orthogonal length-prefix axis of the Isopace wire engine: Fixed plus LL..LLLLLL variable prefixes in ASCII, BCD, binary and EBCDIC representations. A field's wire behaviour is the pair (LengthCodec, fieldcodec.FieldCodec), so these compose freely with any value codec instead of jPOS's combinatorial IF* class zoo.

Per the iso8583 contract a length prefix carries a LOGICAL UNIT COUNT (digits/characters/octets); the engine converts units to a wire byte span via the value codec's optional WidthCodec.

Index

• Variables
• func All() []iso8583.LengthCodec

Variables

var (
	ErrTruncated = errors.New("lengthcodec: truncated length prefix")
	ErrOverflow  = errors.New("lengthcodec: length exceeds prefix capacity")
	ErrBadDigit  = errors.New("lengthcodec: non-digit in length prefix")
)

Errors returned by the length codecs.

var (
	Fixed iso8583.LengthCodec = fixed{}

	LLVarASCII     iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
	LLLVarASCII    iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
	LLLLVarASCII   iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
	LLLLLVarASCII  iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
	LLLLLLVarASCII iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}

	LLVarBCD  iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
	LLLVarBCD iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}

	LLVarBinary  iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
	LLLVarBinary iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}

	LLVarEBCDIC  iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
	LLLVarEBCDIC iso8583.LengthCodec = varLen{/* contains filtered or unexported fields */}
)

The catalog: composable length prefixes referenced by name from schemas, YAML, or directly. Each is a stateless singleton.

Functions

func All

func All() []iso8583.LengthCodec

All returns every length codec in the catalog, for registry population.