readInt32()

in backend/encoding.js [360:382]

• 22 lines of code
• 13 McCabe index (conditional complexity)

  readInt32() {
    let result = 0, shift = 0
    while (this.offset < this.buf.byteLength) {
      const nextByte = this.buf[this.offset]
      if ((shift === 28 && (nextByte & 0x80) !== 0) || // more than 5 bytes
          (shift === 28 && (nextByte & 0x40) === 0 && (nextByte & 0x38) !== 0) || // positive int > 0x7fffffff
          (shift === 28 && (nextByte & 0x40) !== 0 && (nextByte & 0x38) !== 0x38)) { // negative int < -0x80000000
        throw new RangeError('number out of range')
      }
      result |= (nextByte & 0x7f) << shift
      shift += 7
      this.offset++

      if ((nextByte & 0x80) === 0) {
        if ((nextByte & 0x40) === 0 || shift > 28) {
          return result // positive, or negative value that doesn't need sign-extending
        } else {
          return result | (-1 << shift) // sign-extend negative integer
        }
      }
    }
    throw new RangeError('buffer ended with incomplete number')
  }