package org.bouncycastle.shaded.util;
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/**
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* Utility methods for converting byte arrays into ints and longs, and back again.
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*/
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public abstract class Pack
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{
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public static int bigEndianToInt(byte[] bs, int off)
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{
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int n = bs[ off] << 24;
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n |= (bs[++off] & 0xff) << 16;
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n |= (bs[++off] & 0xff) << 8;
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n |= (bs[++off] & 0xff);
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return n;
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}
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public static long bigEndianToLong(byte[] bs, int off)
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{
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int hi = bigEndianToInt(bs, off);
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int lo = bigEndianToInt(bs, off + 4);
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return ((long)(hi & 0xffffffffL) << 32) | (long)(lo & 0xffffffffL);
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}
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public static int littleEndianToInt(byte[] bs, int off)
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{
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int n = bs[off] & 0xff;
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n |= (bs[++off] & 0xff) << 8;
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n |= (bs[++off] & 0xff) << 16;
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n |= bs[++off] << 24;
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return n;
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}
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public static void intToLittleEndian(int n, byte[] bs, int off)
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{
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bs[off] = (byte)(n);
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bs[++off] = (byte)(n >>> 8);
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bs[++off] = (byte)(n >>> 16);
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bs[++off] = (byte)(n >>> 24);
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}
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}
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