BigIntUtils.smali

.class public final Lorg/spongycastle/pqc/math/linearalgebra/BigIntUtils;
.super Ljava/lang/Object;
.source "BigIntUtils.java"


# direct methods
.method private constructor <init>()V
    .registers 1

    .prologue
    .line 15
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 17
    return-void
.end method

.method public static equals([Ljava/math/BigInteger;[Ljava/math/BigInteger;)Z
    .registers 7

    .prologue
    const/4 v1, 0x0

    .line 28
    .line 30
    array-length v0, p0

    array-length v2, p1

    if-eq v0, v2, :cond_6

    .line 41
    :cond_5
    :goto_5
    return v1

    :cond_6
    move v0, v1

    move v2, v1

    .line 34
    :goto_8
    array-length v3, p0

    if-ge v0, v3, :cond_17

    .line 39
    aget-object v3, p0, v0

    aget-object v4, p1, v0

    invoke-virtual {v3, v4}, Ljava/math/BigInteger;->compareTo(Ljava/math/BigInteger;)I

    move-result v3

    or-int/2addr v2, v3

    .line 34
    add-int/lit8 v0, v0, 0x1

    goto :goto_8

    .line 41
    :cond_17
    if-nez v2, :cond_5

    const/4 v1, 0x1

    goto :goto_5
.end method

.method public static fill([Ljava/math/BigInteger;Ljava/math/BigInteger;)V
    .registers 3

    .prologue
    .line 52
    array-length v0, p0

    add-int/lit8 v0, v0, -0x1

    :goto_3
    if-ltz v0, :cond_a

    .line 54
    aput-object p1, p0, v0

    .line 52
    add-int/lit8 v0, v0, -0x1

    goto :goto_3

    .line 56
    :cond_a
    return-void
.end method

.method public static subArray([Ljava/math/BigInteger;II)[Ljava/math/BigInteger;
    .registers 6

    .prologue
    .line 72
    sub-int v0, p2, p1

    new-array v0, v0, [Ljava/math/BigInteger;

    .line 73
    const/4 v1, 0x0

    sub-int v2, p2, p1

    invoke-static {p0, p1, v0, v1, v2}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 74
    return-object v0
.end method

.method public static toIntArray([Ljava/math/BigInteger;)[I
    .registers 4

    .prologue
    .line 86
    array-length v0, p0

    new-array v1, v0, [I

    .line 87
    const/4 v0, 0x0

    :goto_4
    array-length v2, p0

    if-ge v0, v2, :cond_12

    .line 89
    aget-object v2, p0, v0

    invoke-virtual {v2}, Ljava/math/BigInteger;->intValue()I

    move-result v2

    aput v2, v1, v0

    .line 87
    add-int/lit8 v0, v0, 0x1

    goto :goto_4

    .line 91
    :cond_12
    return-object v1
.end method

.method public static toIntArrayModQ(I[Ljava/math/BigInteger;)[I
    .registers 6

    .prologue
    .line 106
    int-to-long v0, p0

    invoke-static {v0, v1}, Ljava/math/BigInteger;->valueOf(J)Ljava/math/BigInteger;

    move-result-object v1

    .line 107
    array-length v0, p1

    new-array v2, v0, [I

    .line 108
    const/4 v0, 0x0

    :goto_9
    array-length v3, p1

    if-ge v0, v3, :cond_1b

    .line 110
    aget-object v3, p1, v0

    invoke-virtual {v3, v1}, Ljava/math/BigInteger;->mod(Ljava/math/BigInteger;)Ljava/math/BigInteger;

    move-result-object v3

    invoke-virtual {v3}, Ljava/math/BigInteger;->intValue()I

    move-result v3

    aput v3, v2, v0

    .line 108
    add-int/lit8 v0, v0, 0x1

    goto :goto_9

    .line 112
    :cond_1b
    return-object v2
.end method

.method public static toMinimalByteArray(Ljava/math/BigInteger;)[B
    .registers 6

    .prologue
    const/4 v4, 0x1

    .line 128
    invoke-virtual {p0}, Ljava/math/BigInteger;->toByteArray()[B

    move-result-object v1

    .line 129
    array-length v0, v1

    if-eq v0, v4, :cond_10

    invoke-virtual {p0}, Ljava/math/BigInteger;->bitLength()I

    move-result v0

    and-int/lit8 v0, v0, 0x7

    if-eqz v0, :cond_12

    :cond_10
    move-object v0, v1

    .line 135
    :goto_11
    return-object v0

    .line 133
    :cond_12
    invoke-virtual {p0}, Ljava/math/BigInteger;->bitLength()I

    move-result v0

    shr-int/lit8 v0, v0, 0x3

    new-array v0, v0, [B

    .line 134
    const/4 v2, 0x0

    array-length v3, v0

    invoke-static {v1, v4, v0, v2, v3}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    goto :goto_11
.end method