package com.google.zxing.common.reedsolomon;

/* loaded from: classes.dex */
public final class ReedSolomonDecoder {
    private final GenericGF a;

    public ReedSolomonDecoder(GenericGF genericGF) {
        this.a = genericGF;
    }

    public void a(int[] iArr, int i) throws ReedSolomonException {
        GenericGFPoly genericGFPoly = new GenericGFPoly(this.a, iArr);
        int[] iArr2 = new int[i];
        boolean z = true;
        for (int i2 = 0; i2 < i; i2++) {
            GenericGF genericGF = this.a;
            int a = genericGFPoly.a(genericGF.a(genericGF.a() + i2));
            iArr2[(i - 1) - i2] = a;
            if (a != 0) {
                z = false;
            }
        }
        if (z) {
            return;
        }
        GenericGFPoly[] a2 = a(this.a.a(i, 1), new GenericGFPoly(this.a, iArr2), i);
        GenericGFPoly genericGFPoly2 = a2[0];
        GenericGFPoly genericGFPoly3 = a2[1];
        int[] a3 = a(genericGFPoly2);
        int[] a4 = a(genericGFPoly3, a3);
        for (int i3 = 0; i3 < a3.length; i3++) {
            int length = (iArr.length - 1) - this.a.c(a3[i3]);
            if (length < 0) {
                throw new ReedSolomonException("Bad error location");
            }
            iArr[length] = GenericGF.c(iArr[length], a4[i3]);
        }
    }

    private GenericGFPoly[] a(GenericGFPoly genericGFPoly, GenericGFPoly genericGFPoly2, int i) throws ReedSolomonException {
        if (genericGFPoly.b() < genericGFPoly2.b()) {
            genericGFPoly2 = genericGFPoly;
            genericGFPoly = genericGFPoly2;
        }
        GenericGFPoly d = this.a.d();
        GenericGFPoly b = this.a.b();
        do {
            GenericGFPoly genericGFPoly3 = genericGFPoly2;
            genericGFPoly2 = genericGFPoly;
            genericGFPoly = genericGFPoly3;
            GenericGFPoly genericGFPoly4 = b;
            GenericGFPoly genericGFPoly5 = d;
            d = genericGFPoly4;
            if (genericGFPoly.b() >= i / 2) {
                if (!genericGFPoly.c()) {
                    GenericGFPoly d2 = this.a.d();
                    int b2 = this.a.b(genericGFPoly.b(genericGFPoly.b()));
                    while (genericGFPoly2.b() >= genericGFPoly.b() && !genericGFPoly2.c()) {
                        int b3 = genericGFPoly2.b() - genericGFPoly.b();
                        int b4 = this.a.b(genericGFPoly2.b(genericGFPoly2.b()), b2);
                        d2 = d2.a(this.a.a(b3, b4));
                        genericGFPoly2 = genericGFPoly2.a(genericGFPoly.a(b3, b4));
                    }
                    b = d2.c(d).a(genericGFPoly5);
                } else {
                    throw new ReedSolomonException("r_{i-1} was zero");
                }
            } else {
                int b5 = d.b(0);
                if (b5 != 0) {
                    int b6 = this.a.b(b5);
                    return new GenericGFPoly[]{d.c(b6), genericGFPoly.c(b6)};
                }
                throw new ReedSolomonException("sigmaTilde(0) was zero");
            }
        } while (genericGFPoly2.b() < genericGFPoly.b());
        throw new IllegalStateException("Division algorithm failed to reduce polynomial?");
    }

    private int[] a(GenericGFPoly genericGFPoly) throws ReedSolomonException {
        int b = genericGFPoly.b();
        int i = 0;
        if (b == 1) {
            return new int[]{genericGFPoly.b(1)};
        }
        int[] iArr = new int[b];
        for (int i2 = 1; i2 < this.a.c() && i < b; i2++) {
            if (genericGFPoly.a(i2) == 0) {
                iArr[i] = this.a.b(i2);
                i++;
            }
        }
        if (i == b) {
            return iArr;
        }
        throw new ReedSolomonException("Error locator degree does not match number of roots");
    }

    private int[] a(GenericGFPoly genericGFPoly, int[] iArr) {
        int length = iArr.length;
        int[] iArr2 = new int[length];
        for (int i = 0; i < length; i++) {
            int b = this.a.b(iArr[i]);
            int i2 = 1;
            for (int i3 = 0; i3 < length; i3++) {
                if (i != i3) {
                    int b2 = this.a.b(iArr[i3], b);
                    i2 = this.a.b(i2, (b2 & 1) == 0 ? b2 | 1 : b2 & (-2));
                }
            }
            iArr2[i] = this.a.b(genericGFPoly.a(b), this.a.b(i2));
            if (this.a.a() != 0) {
                iArr2[i] = this.a.b(iArr2[i], b);
            }
        }
        return iArr2;
    }
}