BitSource.smali

.class public final Lcom/google/zxing/common/BitSource;
.super Ljava/lang/Object;
.source "BitSource.java"


# instance fields
.field private bitOffset:I

.field private byteOffset:I

.field private final bytes:[B


# direct methods
.method static constructor <clinit>()V
    .registers 1

    return-void
.end method

.method public constructor <init>([B)V
    .registers 2
    .param p1, "bytes"    # [B

    .line 38
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 39
    iput-object p1, p0, Lcom/google/zxing/common/BitSource;->bytes:[B

    .line 40
    return-void
.end method


# virtual methods
.method public available()I
    .registers 3

    .line 108
    iget-object v0, p0, Lcom/google/zxing/common/BitSource;->bytes:[B

    array-length v0, v0

    iget v1, p0, Lcom/google/zxing/common/BitSource;->byteOffset:I

    sub-int/2addr v0, v1

    mul-int/lit8 v0, v0, 0x8

    iget v1, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    sub-int/2addr v0, v1

    return v0
.end method

.method public getBitOffset()I
    .registers 2

    .line 46
    iget v0, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    return v0
.end method

.method public getByteOffset()I
    .registers 2

    .line 53
    iget v0, p0, Lcom/google/zxing/common/BitSource;->byteOffset:I

    return v0
.end method

.method public readBits(I)I
    .registers 11
    .param p1, "numBits"    # I

    .line 63
    if-lez p1, :cond_69

    const/16 v0, 0x20

    if-gt p1, v0, :cond_69

    invoke-virtual {p0}, Lcom/google/zxing/common/BitSource;->available()I

    move-result v0

    if-gt p1, v0, :cond_69

    .line 67
    const/4 v0, 0x0

    .line 70
    .local v0, "result":I
    iget v1, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    const/16 v2, 0xff

    const/16 v3, 0x8

    if-lez v1, :cond_3b

    .line 71
    rsub-int/lit8 v1, v1, 0x8

    .line 72
    .local v1, "bitsLeft":I
    if-ge p1, v1, :cond_1b

    move v4, p1

    goto :goto_1c

    :cond_1b
    move v4, v1

    .line 73
    .local v4, "toRead":I
    :goto_1c
    sub-int v5, v1, v4

    .line 74
    .local v5, "bitsToNotRead":I
    rsub-int/lit8 v6, v4, 0x8

    shr-int v6, v2, v6

    shl-int/2addr v6, v5

    .line 75
    .local v6, "mask":I
    iget-object v7, p0, Lcom/google/zxing/common/BitSource;->bytes:[B

    iget v8, p0, Lcom/google/zxing/common/BitSource;->byteOffset:I

    aget-byte v7, v7, v8

    and-int/2addr v7, v6

    shr-int v0, v7, v5

    .line 76
    sub-int/2addr p1, v4

    .line 77
    iget v7, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    add-int/2addr v7, v4

    iput v7, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    .line 78
    if-ne v7, v3, :cond_3b

    .line 79
    const/4 v7, 0x0

    iput v7, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    .line 80
    add-int/lit8 v8, v8, 0x1

    iput v8, p0, Lcom/google/zxing/common/BitSource;->byteOffset:I

    .line 85
    .end local v1    # "bitsLeft":I
    .end local v4    # "toRead":I
    .end local v5    # "bitsToNotRead":I
    .end local v6    # "mask":I
    :cond_3b
    if-lez p1, :cond_68

    .line 86
    :goto_3d
    if-lt p1, v3, :cond_51

    .line 87
    shl-int/lit8 v1, v0, 0x8

    iget-object v4, p0, Lcom/google/zxing/common/BitSource;->bytes:[B

    iget v5, p0, Lcom/google/zxing/common/BitSource;->byteOffset:I

    aget-byte v4, v4, v5

    and-int/2addr v4, v2

    or-int v0, v1, v4

    .line 88
    add-int/lit8 v5, v5, 0x1

    iput v5, p0, Lcom/google/zxing/common/BitSource;->byteOffset:I

    .line 89
    add-int/lit8 p1, p1, -0x8

    goto :goto_3d

    .line 93
    :cond_51
    if-lez p1, :cond_68

    .line 94
    sub-int/2addr v3, p1

    .line 95
    .local v3, "bitsToNotRead":I
    shr-int v1, v2, v3

    shl-int/2addr v1, v3

    .line 96
    .local v1, "mask":I
    shl-int v2, v0, p1

    iget-object v4, p0, Lcom/google/zxing/common/BitSource;->bytes:[B

    iget v5, p0, Lcom/google/zxing/common/BitSource;->byteOffset:I

    aget-byte v4, v4, v5

    and-int/2addr v4, v1

    shr-int/2addr v4, v3

    or-int v0, v2, v4

    .line 97
    iget v2, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    add-int/2addr v2, p1

    iput v2, p0, Lcom/google/zxing/common/BitSource;->bitOffset:I

    .line 101
    .end local v1    # "mask":I
    .end local v3    # "bitsToNotRead":I
    :cond_68
    return v0

    .line 64
    .end local v0    # "result":I
    :cond_69
    new-instance v0, Ljava/lang/IllegalArgumentException;

    invoke-static {p1}, Ljava/lang/String;->valueOf(I)Ljava/lang/String;

    move-result-object v1

    invoke-direct {v0, v1}, Ljava/lang/IllegalArgumentException;-><init>(Ljava/lang/String;)V

    goto :goto_74

    :goto_73
    throw v0

    :goto_74
    goto :goto_73
.end method