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[13350] | 1 | /*
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| 2 | * CountingInputStream
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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 | import java.io.FilterInputStream;
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| 13 | import java.io.InputStream;
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| 14 | import java.io.IOException;
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| 15 |
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| 16 | /**
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| 17 | * Counts the number of bytes read from an input stream.
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| 18 | * The <code>close()</code> method does nothing, that is, the underlying
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| 19 | * <code>InputStream</code> isn't closed.
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| 20 | */
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| 21 | class CountingInputStream extends CloseIgnoringInputStream {
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| 22 | private long size = 0;
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| 23 |
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| 24 | public CountingInputStream(InputStream in) {
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| 25 | super(in);
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| 26 | }
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| 27 |
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| 28 | public int read() throws IOException {
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| 29 | int ret = in.read();
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| 30 | if (ret != -1 && size >= 0)
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| 31 | ++size;
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| 32 |
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| 33 | return ret;
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| 34 | }
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| 35 |
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| 36 | public int read(byte[] b, int off, int len) throws IOException {
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| 37 | int ret = in.read(b, off, len);
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| 38 | if (ret > 0 && size >= 0)
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| 39 | size += ret;
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| 40 |
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| 41 | return ret;
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| 42 | }
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| 43 |
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| 44 | public long getSize() {
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| 45 | return size;
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| 46 | }
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| 47 | }
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