631 lines
16 KiB
Smali
631 lines
16 KiB
Smali
.class public final Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;
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.super Ljava/lang/Object;
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.source "ReedSolomonDecoder.java"
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# instance fields
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.field private final field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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# direct methods
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.method public constructor <init>(Lcom/google/zxing/common/reedsolomon/GenericGF;)V
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.locals 0
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.line 1
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invoke-direct {p0}, Ljava/lang/Object;-><init>()V
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.line 2
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iput-object p1, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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return-void
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.end method
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.method private findErrorLocations(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;)[I
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.locals 5
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.annotation system Ldalvik/annotation/Throws;
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value = {
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Lcom/google/zxing/common/reedsolomon/ReedSolomonException;
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}
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.end annotation
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.line 1
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invoke-virtual {p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v0
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const/4 v1, 0x0
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const/4 v2, 0x1
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if-ne v0, v2, :cond_0
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new-array v0, v2, [I
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.line 2
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invoke-virtual {p1, v2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getCoefficient(I)I
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move-result p1
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aput p1, v0, v1
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return-object v0
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.line 3
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:cond_0
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new-array v3, v0, [I
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.line 4
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:goto_0
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iget-object v4, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v4}, Lcom/google/zxing/common/reedsolomon/GenericGF;->getSize()I
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move-result v4
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if-ge v2, v4, :cond_3
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if-lt v1, v0, :cond_1
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goto :goto_1
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.line 5
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:cond_1
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invoke-virtual {p1, v2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->evaluateAt(I)I
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move-result v4
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if-nez v4, :cond_2
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.line 6
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iget-object v4, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v4, v2}, Lcom/google/zxing/common/reedsolomon/GenericGF;->inverse(I)I
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move-result v4
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aput v4, v3, v1
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add-int/lit8 v1, v1, 0x1
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:cond_2
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add-int/lit8 v2, v2, 0x1
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goto :goto_0
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:cond_3
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:goto_1
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if-ne v1, v0, :cond_4
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return-object v3
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.line 7
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:cond_4
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new-instance p1, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;
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const-string v0, "Error locator degree does not match number of roots"
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invoke-direct {p1, v0}, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;-><init>(Ljava/lang/String;)V
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throw p1
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.end method
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.method private findErrorMagnitudes(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;[IZ)[I
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.locals 9
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.line 1
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array-length v0, p2
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.line 2
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new-array v1, v0, [I
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const/4 v2, 0x0
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move v3, v2
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:goto_0
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if-lt v3, v0, :cond_0
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return-object v1
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.line 3
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:cond_0
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iget-object v4, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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aget v5, p2, v3
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invoke-virtual {v4, v5}, Lcom/google/zxing/common/reedsolomon/GenericGF;->inverse(I)I
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move-result v4
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const/4 v5, 0x1
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move v6, v2
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:goto_1
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if-lt v6, v0, :cond_2
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.line 4
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iget-object v6, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {p1, v4}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->evaluateAt(I)I
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move-result v7
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.line 5
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iget-object v8, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v8, v5}, Lcom/google/zxing/common/reedsolomon/GenericGF;->inverse(I)I
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move-result v5
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.line 6
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invoke-virtual {v6, v7, v5}, Lcom/google/zxing/common/reedsolomon/GenericGF;->multiply(II)I
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move-result v5
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aput v5, v1, v3
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if-eqz p3, :cond_1
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.line 7
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iget-object v5, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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aget v6, v1, v3
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invoke-virtual {v5, v6, v4}, Lcom/google/zxing/common/reedsolomon/GenericGF;->multiply(II)I
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move-result v4
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aput v4, v1, v3
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:cond_1
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add-int/lit8 v3, v3, 0x1
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goto :goto_0
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:cond_2
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if-eq v3, v6, :cond_4
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.line 8
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iget-object v7, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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aget v8, p2, v6
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invoke-virtual {v7, v8, v4}, Lcom/google/zxing/common/reedsolomon/GenericGF;->multiply(II)I
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move-result v7
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and-int/lit8 v8, v7, 0x1
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if-nez v8, :cond_3
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or-int/lit8 v7, v7, 0x1
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goto :goto_2
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:cond_3
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and-int/lit8 v7, v7, -0x2
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.line 9
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:goto_2
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iget-object v8, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v8, v5, v7}, Lcom/google/zxing/common/reedsolomon/GenericGF;->multiply(II)I
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move-result v5
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:cond_4
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add-int/lit8 v6, v6, 0x1
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goto :goto_1
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.end method
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.method private runEuclideanAlgorithm(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;Lcom/google/zxing/common/reedsolomon/GenericGFPoly;I)[Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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.locals 9
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.annotation system Ldalvik/annotation/Throws;
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value = {
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Lcom/google/zxing/common/reedsolomon/ReedSolomonException;
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}
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.end annotation
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.line 1
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invoke-virtual {p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v0
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invoke-virtual {p2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v1
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if-ge v0, v1, :cond_0
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move-object v7, p2
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move-object p2, p1
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move-object p1, v7
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.line 2
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:cond_0
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iget-object v0, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v0}, Lcom/google/zxing/common/reedsolomon/GenericGF;->getZero()Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v0
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.line 3
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iget-object v1, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v1}, Lcom/google/zxing/common/reedsolomon/GenericGF;->getOne()Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v1
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move-object v7, p2
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move-object p2, p1
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move-object p1, v7
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.line 4
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:goto_0
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invoke-virtual {p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v2
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const/4 v3, 0x2
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div-int/lit8 v4, p3, 0x2
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if-ge v2, v4, :cond_2
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const/4 p2, 0x0
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.line 5
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invoke-virtual {v1, p2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getCoefficient(I)I
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move-result p3
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if-eqz p3, :cond_1
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.line 6
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iget-object v0, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v0, p3}, Lcom/google/zxing/common/reedsolomon/GenericGF;->inverse(I)I
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move-result p3
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.line 7
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invoke-virtual {v1, p3}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->multiply(I)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v0
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.line 8
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invoke-virtual {p1, p3}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->multiply(I)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object p1
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new-array p3, v3, [Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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aput-object v0, p3, p2
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const/4 p2, 0x1
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aput-object p1, p3, p2
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return-object p3
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.line 9
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:cond_1
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new-instance p1, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;
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const-string p2, "sigmaTilde(0) was zero"
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invoke-direct {p1, p2}, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;-><init>(Ljava/lang/String;)V
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throw p1
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.line 10
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:cond_2
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invoke-virtual {p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->isZero()Z
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move-result v2
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if-nez v2, :cond_5
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.line 11
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iget-object v2, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v2}, Lcom/google/zxing/common/reedsolomon/GenericGF;->getZero()Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v2
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.line 12
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invoke-virtual {p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v3
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invoke-virtual {p1, v3}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getCoefficient(I)I
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move-result v3
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.line 13
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iget-object v4, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v4, v3}, Lcom/google/zxing/common/reedsolomon/GenericGF;->inverse(I)I
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move-result v3
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.line 14
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:goto_1
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invoke-virtual {p2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v4
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invoke-virtual {p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v5
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if-lt v4, v5, :cond_4
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invoke-virtual {p2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->isZero()Z
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move-result v4
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if-eqz v4, :cond_3
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goto :goto_2
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.line 15
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:cond_3
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invoke-virtual {p2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v4
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invoke-virtual {p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v5
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sub-int/2addr v4, v5
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.line 16
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iget-object v5, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {p2}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getDegree()I
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move-result v6
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invoke-virtual {p2, v6}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->getCoefficient(I)I
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move-result v6
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invoke-virtual {v5, v6, v3}, Lcom/google/zxing/common/reedsolomon/GenericGF;->multiply(II)I
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move-result v5
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.line 17
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iget-object v6, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v6, v4, v5}, Lcom/google/zxing/common/reedsolomon/GenericGF;->buildMonomial(II)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v6
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invoke-virtual {v2, v6}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->addOrSubtract(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v2
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.line 18
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invoke-virtual {p1, v4, v5}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->multiplyByMonomial(II)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v4
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invoke-virtual {p2, v4}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->addOrSubtract(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object p2
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goto :goto_1
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.line 19
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:cond_4
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:goto_2
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invoke-virtual {v2, v1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->multiply(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v2
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invoke-virtual {v2, v0}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->addOrSubtract(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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move-result-object v0
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move-object v7, p2
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move-object p2, p1
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move-object p1, v7
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move-object v8, v1
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move-object v1, v0
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move-object v0, v8
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goto/16 :goto_0
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.line 20
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:cond_5
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new-instance p1, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;
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const-string p2, "r_{i-1} was zero"
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invoke-direct {p1, p2}, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;-><init>(Ljava/lang/String;)V
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throw p1
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.end method
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# virtual methods
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.method public decode([II)V
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.locals 9
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.annotation system Ldalvik/annotation/Throws;
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value = {
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Lcom/google/zxing/common/reedsolomon/ReedSolomonException;
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}
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.end annotation
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.line 1
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new-instance v0, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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iget-object v1, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-direct {v0, v1, p1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;-><init>(Lcom/google/zxing/common/reedsolomon/GenericGF;[I)V
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.line 2
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new-array v1, p2, [I
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.line 3
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iget-object v2, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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sget-object v3, Lcom/google/zxing/common/reedsolomon/GenericGF;->DATA_MATRIX_FIELD_256:Lcom/google/zxing/common/reedsolomon/GenericGF;
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invoke-virtual {v2, v3}, Ljava/lang/Object;->equals(Ljava/lang/Object;)Z
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move-result v2
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const/4 v3, 0x0
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const/4 v4, 0x1
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|
move v5, v3
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|
|
move v6, v4
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|
|
:goto_0
|
|
if-lt v5, p2, :cond_3
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|
|
if-eqz v6, :cond_0
|
|
|
|
return-void
|
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|
|
.line 4
|
|
:cond_0
|
|
new-instance v0, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
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|
|
iget-object v5, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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|
|
|
invoke-direct {v0, v5, v1}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;-><init>(Lcom/google/zxing/common/reedsolomon/GenericGF;[I)V
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|
|
.line 5
|
|
iget-object v1, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
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|
|
|
invoke-virtual {v1, p2, v4}, Lcom/google/zxing/common/reedsolomon/GenericGF;->buildMonomial(II)Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
|
|
|
|
move-result-object v1
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|
|
|
invoke-direct {p0, v1, v0, p2}, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->runEuclideanAlgorithm(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;Lcom/google/zxing/common/reedsolomon/GenericGFPoly;I)[Lcom/google/zxing/common/reedsolomon/GenericGFPoly;
|
|
|
|
move-result-object p2
|
|
|
|
.line 6
|
|
aget-object v0, p2, v3
|
|
|
|
.line 7
|
|
aget-object p2, p2, v4
|
|
|
|
.line 8
|
|
invoke-direct {p0, v0}, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->findErrorLocations(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;)[I
|
|
|
|
move-result-object v0
|
|
|
|
.line 9
|
|
invoke-direct {p0, p2, v0, v2}, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->findErrorMagnitudes(Lcom/google/zxing/common/reedsolomon/GenericGFPoly;[IZ)[I
|
|
|
|
move-result-object p2
|
|
|
|
.line 10
|
|
:goto_1
|
|
array-length v1, v0
|
|
|
|
if-lt v3, v1, :cond_1
|
|
|
|
return-void
|
|
|
|
.line 11
|
|
:cond_1
|
|
array-length v1, p1
|
|
|
|
sub-int/2addr v1, v4
|
|
|
|
iget-object v2, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
|
|
|
|
aget v5, v0, v3
|
|
|
|
invoke-virtual {v2, v5}, Lcom/google/zxing/common/reedsolomon/GenericGF;->log(I)I
|
|
|
|
move-result v2
|
|
|
|
sub-int/2addr v1, v2
|
|
|
|
if-ltz v1, :cond_2
|
|
|
|
.line 12
|
|
aget v2, p1, v1
|
|
|
|
aget v5, p2, v3
|
|
|
|
invoke-static {v2, v5}, Lcom/google/zxing/common/reedsolomon/GenericGF;->addOrSubtract(II)I
|
|
|
|
move-result v2
|
|
|
|
aput v2, p1, v1
|
|
|
|
add-int/lit8 v3, v3, 0x1
|
|
|
|
goto :goto_1
|
|
|
|
.line 13
|
|
:cond_2
|
|
new-instance p1, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;
|
|
|
|
const-string p2, "Bad error location"
|
|
|
|
invoke-direct {p1, p2}, Lcom/google/zxing/common/reedsolomon/ReedSolomonException;-><init>(Ljava/lang/String;)V
|
|
|
|
throw p1
|
|
|
|
.line 14
|
|
:cond_3
|
|
iget-object v7, p0, Lcom/google/zxing/common/reedsolomon/ReedSolomonDecoder;->field:Lcom/google/zxing/common/reedsolomon/GenericGF;
|
|
|
|
if-eqz v2, :cond_4
|
|
|
|
add-int/lit8 v8, v5, 0x1
|
|
|
|
goto :goto_2
|
|
|
|
:cond_4
|
|
move v8, v5
|
|
|
|
:goto_2
|
|
invoke-virtual {v7, v8}, Lcom/google/zxing/common/reedsolomon/GenericGF;->exp(I)I
|
|
|
|
move-result v7
|
|
|
|
invoke-virtual {v0, v7}, Lcom/google/zxing/common/reedsolomon/GenericGFPoly;->evaluateAt(I)I
|
|
|
|
move-result v7
|
|
|
|
add-int/lit8 v8, p2, -0x1
|
|
|
|
sub-int/2addr v8, v5
|
|
|
|
.line 15
|
|
aput v7, v1, v8
|
|
|
|
if-eqz v7, :cond_5
|
|
|
|
move v6, v3
|
|
|
|
:cond_5
|
|
add-int/lit8 v5, v5, 0x1
|
|
|
|
goto :goto_0
|
|
.end method
|