jimu-decompiled/sources/com/getkeepsafe/relinker/elf/ElfParser.java

package com.getkeepsafe.relinker.elf;

import com.getkeepsafe.relinker.elf.Elf;
import java.io.Closeable;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

/* loaded from: classes.dex */
public class ElfParser implements Closeable, Elf {
    private final FileChannel a;

    public ElfParser(File file) throws FileNotFoundException {
        if (file == null || !file.exists()) {
            throw new IllegalArgumentException("File is null or does not exist");
        }
        this.a = new FileInputStream(file).getChannel();
    }

    public Elf.Header a() throws IOException {
        this.a.position(0L);
        ByteBuffer allocate = ByteBuffer.allocate(8);
        allocate.order(ByteOrder.LITTLE_ENDIAN);
        if (e(allocate, 0L) != 1179403647) {
            throw new IllegalArgumentException("Invalid ELF Magic!");
        }
        short a = a(allocate, 4L);
        boolean z = a(allocate, 5L) == 2;
        if (a == 1) {
            return new Elf32Header(z, this);
        }
        if (a == 2) {
            return new Elf64Header(z, this);
        }
        throw new IllegalStateException("Invalid class type!");
    }

    public List<String> b() throws IOException {
        long j;
        this.a.position(0L);
        ArrayList arrayList = new ArrayList();
        Elf.Header a = a();
        ByteBuffer allocate = ByteBuffer.allocate(8);
        allocate.order(a.a ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN);
        long j2 = a.e;
        int i = 0;
        if (j2 == 65535) {
            j2 = a.a(0).a;
        }
        long j3 = 0;
        while (true) {
            if (j3 >= j2) {
                j = 0;
                break;
            }
            Elf.ProgramHeader a2 = a.a(j3);
            if (a2.a == 2) {
                j = a2.b;
                break;
            }
            j3++;
        }
        if (j == 0) {
            return Collections.unmodifiableList(arrayList);
        }
        ArrayList arrayList2 = new ArrayList();
        long j4 = 0;
        while (true) {
            Elf.DynamicStructure a3 = a.a(j, i);
            long j5 = j;
            long j6 = a3.a;
            if (j6 == 1) {
                arrayList2.add(Long.valueOf(a3.b));
            } else if (j6 == 5) {
                j4 = a3.b;
            }
            i++;
            if (a3.a == 0) {
                break;
            }
            j = j5;
        }
        if (j4 == 0) {
            throw new IllegalStateException("String table offset not found!");
        }
        long a4 = a(a, j2, j4);
        Iterator it = arrayList2.iterator();
        while (it.hasNext()) {
            arrayList.add(d(allocate, ((Long) it.next()).longValue() + a4));
        }
        return arrayList;
    }

    protected long c(ByteBuffer byteBuffer, long j) throws IOException {
        a(byteBuffer, j, 8);
        return byteBuffer.getLong();
    }

    @Override // java.io.Closeable, java.lang.AutoCloseable
    public void close() throws IOException {
        this.a.close();
    }

    protected String d(ByteBuffer byteBuffer, long j) throws IOException {
        StringBuilder sb = new StringBuilder();
        while (true) {
            long j2 = 1 + j;
            short a = a(byteBuffer, j);
            if (a == 0) {
                return sb.toString();
            }
            sb.append((char) a);
            j = j2;
        }
    }

    protected long e(ByteBuffer byteBuffer, long j) throws IOException {
        a(byteBuffer, j, 4);
        return byteBuffer.getInt() & 4294967295L;
    }

    private long a(Elf.Header header, long j, long j2) throws IOException {
        for (long j3 = 0; j3 < j; j3++) {
            Elf.ProgramHeader a = header.a(j3);
            if (a.a == 1) {
                long j4 = a.c;
                if (j4 <= j2 && j2 <= a.d + j4) {
                    return (j2 - j4) + a.b;
                }
            }
        }
        throw new IllegalStateException("Could not map vma to file offset!");
    }

    protected short a(ByteBuffer byteBuffer, long j) throws IOException {
        a(byteBuffer, j, 1);
        return (short) (byteBuffer.get() & 255);
    }

    protected void a(ByteBuffer byteBuffer, long j, int i) throws IOException {
        byteBuffer.position(0);
        byteBuffer.limit(i);
        long j2 = 0;
        while (j2 < i) {
            int read = this.a.read(byteBuffer, j + j2);
            if (read == -1) {
                throw new EOFException();
            }
            j2 += read;
        }
        byteBuffer.position(0);
    }

    protected int b(ByteBuffer byteBuffer, long j) throws IOException {
        a(byteBuffer, j, 2);
        return byteBuffer.getShort() & 65535;
    }
}