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1 | /*
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2 | * RangeEncoderToBuffer
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3 | *
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4 | * Authors: Lasse Collin <lasse.collin@tukaani.org>
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5 | * Igor Pavlov <http://7-zip.org/>
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6 | *
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7 | * This file has been put into the public domain.
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8 | * You can do whatever you want with this file.
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9 | */
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10 |
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11 | package org.tukaani.xz.rangecoder;
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12 |
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13 | import java.io.OutputStream;
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14 | import java.io.IOException;
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15 | import org.tukaani.xz.ArrayCache;
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16 |
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17 | public final class RangeEncoderToBuffer extends RangeEncoder {
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18 | private final byte[] buf;
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19 | private int bufPos;
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20 |
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21 | public RangeEncoderToBuffer(int bufSize, ArrayCache arrayCache) {
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22 | buf = arrayCache.getByteArray(bufSize, false);
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23 | reset();
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24 | }
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25 |
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26 | public void putArraysToCache(ArrayCache arrayCache) {
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27 | arrayCache.putArray(buf);
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28 | }
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29 |
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30 | public void reset() {
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31 | super.reset();
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32 | bufPos = 0;
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33 | }
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34 |
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35 | public int getPendingSize() {
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36 | // With LZMA2 it is known that cacheSize fits into an int.
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37 | return bufPos + (int)cacheSize + 5 - 1;
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38 | }
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39 |
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40 | public int finish() {
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41 | // super.finish() cannot throw an IOException because writeByte()
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42 | // provided in this file cannot throw an IOException.
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43 | try {
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44 | super.finish();
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45 | } catch (IOException e) {
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46 | throw new Error();
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47 | }
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48 |
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49 | return bufPos;
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50 | }
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51 |
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52 | public void write(OutputStream out) throws IOException {
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53 | out.write(buf, 0, bufPos);
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54 | }
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55 |
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56 | void writeByte(int b) {
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57 | buf[bufPos++] = (byte)b;
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58 | }
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59 | }
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