private void init(int stripeSize, int paritySize) { assert (stripeSize + paritySize < GF.getFieldSize()); this.stripeSize = stripeSize; this.paritySize = paritySize; this.errSignature = new int[paritySize]; this.paritySymbolLocations = new int[paritySize]; this.dataBuff = new int[paritySize + stripeSize]; for (int i = 0; i < paritySize; i++) { paritySymbolLocations[i] = i; } this.primitivePower = new int[stripeSize + paritySize]; // compute powers of the primitive root for (int i = 0; i < stripeSize + paritySize; i++) { primitivePower[i] = GF.power(PRIMITIVE_ROOT, i); } // compute generating polynomial int[] gen = {1}; int[] poly = new int[2]; for (int i = 0; i < paritySize; i++) { poly[0] = primitivePower[i]; poly[1] = 1; gen = GF.multiply(gen, poly); } // generating polynomial has all generating roots generatingPolynomial = gen; }
@Override public int symbolSize() { return (int) Math.round(Math.log(GF.getFieldSize()) / Math.log(2)); }