| /* |
| * 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.util.NB; |
| import org.eclipse.jgit.util.RawParseUtils; |
| |
| /** |
| * A mutable SHA-256 abstraction. |
| * |
| * Ported to SHA-256 from {@link org.eclipse.jgit.lib.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 org.eclipse.jgit.lfs.lib.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 java.lang.ArrayIndexOutOfBoundsException |
| * {@code index} is less than 0, equal to |
| * {@link org.eclipse.jgit.lfs.lib.Constants#LONG_OBJECT_ID_LENGTH}, |
| * or greater than |
| * {@link org.eclipse.jgit.lfs.lib.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 org.eclipse.jgit.lfs.lib.LongObjectId#zeroId()}. |
| */ |
| public void clear() { |
| w1 = 0; |
| w2 = 0; |
| w3 = 0; |
| w4 = 0; |
| } |
| |
| /** |
| * Copy a 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 a 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(byte[] bs) { |
| fromRaw(bs, 0); |
| } |
| |
| /** |
| * Convert a 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(byte[] bs, 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 a 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(long[] longs) { |
| fromRaw(longs, 0); |
| } |
| |
| /** |
| * Convert a 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(long[] longs, int p) { |
| w1 = longs[p]; |
| w2 = longs[p + 1]; |
| w3 = longs[p + 2]; |
| w4 = longs[p + 3]; |
| } |
| |
| /** |
| * Convert a 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(byte[] buf, int offset) { |
| fromHexString(buf, offset); |
| } |
| |
| /** |
| * Convert a LongObjectId from hex characters. |
| * |
| * @param str |
| * the string to read from. Must be 64 characters long. |
| */ |
| public void fromString(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(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); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public LongObjectId toObjectId() { |
| return new LongObjectId(this); |
| } |
| } |