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- /*
- * Copyright (C) 2015, Matthias Sohn <matthias.sohn@sap.com>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- package org.eclipse.jgit.lfs.lib;
-
- import java.text.MessageFormat;
-
- import org.eclipse.jgit.lfs.errors.InvalidLongObjectIdException;
- import org.eclipse.jgit.lfs.internal.LfsText;
- import org.eclipse.jgit.lib.MutableObjectId;
- import org.eclipse.jgit.util.NB;
- import org.eclipse.jgit.util.RawParseUtils;
-
- /**
- * A mutable SHA-256 abstraction.
- *
- * Ported to SHA-256 from {@link MutableObjectId}
- *
- * @since 4.3
- */
- public class MutableLongObjectId extends AnyLongObjectId {
- /**
- * Empty constructor. Initialize object with default (zeros) value.
- */
- public MutableLongObjectId() {
- super();
- }
-
- /**
- * Copying constructor.
- *
- * @param src
- * original entry, to copy id from
- */
- MutableLongObjectId(MutableLongObjectId src) {
- fromObjectId(src);
- }
-
- /**
- * Set any byte in the id.
- *
- * @param index
- * index of the byte to set in the raw form of the ObjectId. Must
- * be in range [0, {@link Constants#LONG_OBJECT_ID_LENGTH}).
- * @param value
- * the value of the specified byte at {@code index}. Values are
- * unsigned and thus are in the range [0,255] rather than the
- * signed byte range of [-128, 127].
- * @throws ArrayIndexOutOfBoundsException
- * {@code index} is less than 0, equal to
- * {@link Constants#LONG_OBJECT_ID_LENGTH}, or greater than
- * {@link Constants#LONG_OBJECT_ID_LENGTH}.
- */
- public void setByte(int index, int value) {
- switch (index >> 3) {
- case 0:
- w1 = set(w1, index & 7, value);
- break;
- case 1:
- w2 = set(w2, index & 7, value);
- break;
- case 2:
- w3 = set(w3, index & 7, value);
- break;
- case 3:
- w4 = set(w4, index & 7, value);
- break;
- default:
- throw new ArrayIndexOutOfBoundsException(index);
- }
- }
-
- private static long set(long w, int index, long value) {
- value &= 0xff;
-
- switch (index) {
- case 0:
- return (w & 0x00ffffffffffffffL) | (value << 56);
- case 1:
- return (w & 0xff00ffffffffffffL) | (value << 48);
- case 2:
- return (w & 0xffff00ffffffffffL) | (value << 40);
- case 3:
- return (w & 0xffffff00ffffffffL) | (value << 32);
- case 4:
- return (w & 0xffffffff00ffffffL) | (value << 24);
- case 5:
- return (w & 0xffffffffff00ffffL) | (value << 16);
- case 6:
- return (w & 0xffffffffffff00ffL) | (value << 8);
- case 7:
- return (w & 0xffffffffffffff00L) | value;
- default:
- throw new ArrayIndexOutOfBoundsException();
- }
- }
-
- /** Make this id match {@link LongObjectId#zeroId()}. */
- public void clear() {
- w1 = 0;
- w2 = 0;
- w3 = 0;
- w4 = 0;
- }
-
- /**
- * Copy an LongObjectId into this mutable buffer.
- *
- * @param src
- * the source id to copy from.
- */
- public void fromObjectId(AnyLongObjectId src) {
- this.w1 = src.w1;
- this.w2 = src.w2;
- this.w3 = src.w3;
- this.w4 = src.w4;
- }
-
- /**
- * Convert an LongObjectId from raw binary representation.
- *
- * @param bs
- * the raw byte buffer to read from. At least 32 bytes must be
- * available within this byte array.
- */
- public void fromRaw(final byte[] bs) {
- fromRaw(bs, 0);
- }
-
- /**
- * Convert an LongObjectId from raw binary representation.
- *
- * @param bs
- * the raw byte buffer to read from. At least 32 bytes after p
- * must be available within this byte array.
- * @param p
- * position to read the first byte of data from.
- */
- public void fromRaw(final byte[] bs, final int p) {
- w1 = NB.decodeInt64(bs, p);
- w2 = NB.decodeInt64(bs, p + 8);
- w3 = NB.decodeInt64(bs, p + 16);
- w4 = NB.decodeInt64(bs, p + 24);
- }
-
- /**
- * Convert an LongObjectId from binary representation expressed in integers.
- *
- * @param longs
- * the raw long buffer to read from. At least 4 longs must be
- * available within this longs array.
- */
- public void fromRaw(final long[] longs) {
- fromRaw(longs, 0);
- }
-
- /**
- * Convert an LongObjectId from binary representation expressed in longs.
- *
- * @param longs
- * the raw int buffer to read from. At least 4 longs after p must
- * be available within this longs array.
- * @param p
- * position to read the first integer of data from.
- *
- */
- public void fromRaw(final long[] longs, final int p) {
- w1 = longs[p];
- w2 = longs[p + 1];
- w3 = longs[p + 2];
- w4 = longs[p + 3];
- }
-
- /**
- * Convert an LongObjectId from hex characters (US-ASCII).
- *
- * @param buf
- * the US-ASCII buffer to read from. At least 32 bytes after
- * offset must be available within this byte array.
- * @param offset
- * position to read the first character from.
- */
- public void fromString(final byte[] buf, final int offset) {
- fromHexString(buf, offset);
- }
-
- /**
- * Convert an LongObjectId from hex characters.
- *
- * @param str
- * the string to read from. Must be 64 characters long.
- */
- public void fromString(final String str) {
- if (str.length() != Constants.LONG_OBJECT_ID_STRING_LENGTH)
- throw new IllegalArgumentException(
- MessageFormat.format(LfsText.get().invalidLongId, str));
- fromHexString(org.eclipse.jgit.lib.Constants.encodeASCII(str), 0);
- }
-
- private void fromHexString(final byte[] bs, int p) {
- try {
- w1 = RawParseUtils.parseHexInt64(bs, p);
- w2 = RawParseUtils.parseHexInt64(bs, p + 16);
- w3 = RawParseUtils.parseHexInt64(bs, p + 32);
- w4 = RawParseUtils.parseHexInt64(bs, p + 48);
- } catch (ArrayIndexOutOfBoundsException e1) {
- throw new InvalidLongObjectIdException(bs, p,
- Constants.LONG_OBJECT_ID_STRING_LENGTH);
- }
- }
-
- @Override
- public LongObjectId toObjectId() {
- return new LongObjectId(this);
- }
- }
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