mutating func readAbbrevOp()

in Sources/TSCUtility/BitstreamReader.swift [77:101]

• 24 lines of code
• 9 McCabe index (conditional complexity)

  mutating func readAbbrevOp() throws -> Bitstream.Abbreviation.Operand {
    let isLiteralFlag = try cursor.read(1)
    if isLiteralFlag == 1 {
      return .literal(try cursor.readVBR(8))
    }

    switch try cursor.read(3) {
    case 0:
      throw Error.invalidAbbrev
    case 1:
      return .fixed(bitWidth: UInt8(try cursor.readVBR(5)))
    case 2:
      return .vbr(chunkBitWidth: UInt8(try cursor.readVBR(5)))
    case 3:
      return .array(try readAbbrevOp())
    case 4:
      return .char6
    case 5:
      return .blob
    case 6, 7:
      throw Error.invalidAbbrev
    default:
      fatalError()
    }
  }