private def encode8to7()

in scalasig/scalasig/src/main/scala/scala/meta/internal/scalasig/ClassfileWriter.scala [20:84]

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

  private def encode8to7(src: Array[Byte]): Array[Byte] = {
    val srclen = src.length
    val dstlen = (srclen * 8 + 6) / 7
    val dst = new Array[Byte](dstlen)
    var i = 0
    var j = 0
    while (i + 6 < srclen) {
      var in: Int = src(i) & 0xff
      dst(j) = (in & 0x7f).toByte
      var out: Int = in >>> 7
      in = src(i + 1) & 0xff
      dst(j + 1) = (out | (in << 1) & 0x7f).toByte
      out = in >>> 6
      in = src(i + 2) & 0xff
      dst(j + 2) = (out | (in << 2) & 0x7f).toByte
      out = in >>> 5
      in = src(i + 3) & 0xff
      dst(j + 3) = (out | (in << 3) & 0x7f).toByte
      out = in >>> 4
      in = src(i + 4) & 0xff
      dst(j + 4) = (out | (in << 4) & 0x7f).toByte
      out = in >>> 3
      in = src(i + 5) & 0xff
      dst(j + 5) = (out | (in << 5) & 0x7f).toByte
      out = in >>> 2
      in = src(i + 6) & 0xff
      dst(j + 6) = (out | (in << 6) & 0x7f).toByte
      out = in >>> 1
      dst(j + 7) = out.toByte
      i += 7
      j += 8
    }
    if (i < srclen) {
      var in: Int = src(i) & 0xff
      dst(j) = (in & 0x7f).toByte; j += 1
      var out: Int = in >>> 7
      if (i + 1 < srclen) {
        in = src(i + 1) & 0xff
        dst(j) = (out | (in << 1) & 0x7f).toByte; j += 1
        out = in >>> 6
        if (i + 2 < srclen) {
          in = src(i + 2) & 0xff
          dst(j) = (out | (in << 2) & 0x7f).toByte; j += 1
          out = in >>> 5
          if (i + 3 < srclen) {
            in = src(i + 3) & 0xff
            dst(j) = (out | (in << 3) & 0x7f).toByte; j += 1
            out = in >>> 4
            if (i + 4 < srclen) {
              in = src(i + 4) & 0xff
              dst(j) = (out | (in << 4) & 0x7f).toByte; j += 1
              out = in >>> 3
              if (i + 5 < srclen) {
                in = src(i + 5) & 0xff
                dst(j) = (out | (in << 5) & 0x7f).toByte; j += 1
                out = in >>> 2
              }
            }
          }
        }
      }
      if (j < dstlen) dst(j) = out.toByte
    }
    dst
  }