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1 | /*
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2 | * BCJEncoder
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3 | *
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4 | * Author: Lasse Collin <lasse.collin@tukaani.org>
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5 | *
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6 | * This file has been put into the public domain.
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7 | * You can do whatever you want with this file.
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8 | */
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9 |
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10 | package org.tukaani.xz;
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11 |
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12 | class BCJEncoder extends BCJCoder implements FilterEncoder {
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13 | private final BCJOptions options;
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14 | private final long filterID;
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15 | private final byte[] props;
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16 |
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17 | BCJEncoder(BCJOptions options, long filterID) {
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18 | assert isBCJFilterID(filterID);
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19 | int startOffset = options.getStartOffset();
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20 |
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21 | if (startOffset == 0) {
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22 | props = new byte[0];
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23 | } else {
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24 | props = new byte[4];
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25 | for (int i = 0; i < 4; ++i)
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26 | props[i] = (byte)(startOffset >>> (i * 8));
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27 | }
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28 |
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29 | this.filterID = filterID;
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30 | this.options = (BCJOptions)options.clone();
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31 | }
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32 |
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33 | public long getFilterID() {
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34 | return filterID;
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35 | }
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36 |
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37 | public byte[] getFilterProps() {
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38 | return props;
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39 | }
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40 |
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41 | public boolean supportsFlushing() {
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42 | return false;
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43 | }
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44 |
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45 | public FinishableOutputStream getOutputStream(FinishableOutputStream out,
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46 | ArrayCache arrayCache) {
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47 | return options.getOutputStream(out, arrayCache);
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48 | }
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49 | }
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