56 lines
1.6 KiB
Java
56 lines
1.6 KiB
Java
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/*
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* The Broad Institute
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* SOFTWARE COPYRIGHT NOTICE AGREEMENT
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* This software and its documentation are copyright 2009 by the
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* Broad Institute/Massachusetts Institute of Technology. All rights are reserved.
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*
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* This software is supplied without any warranty or guaranteed support whatsoever. Neither
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* the Broad Institute nor MIT can be responsible for its use, misuse, or functionality.
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*/
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package edu.mit.broad.sam.util;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.Writer;
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/**
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* Fast (I hope) Writer that converts char to byte merely by casting, rather than charset conversion.
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*/
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public class AsciiWriter extends Writer {
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private final OutputStream os;
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// Buffer size has not been tuned.
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private final byte[] buffer = new byte[10000];
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private int numBytes;
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public AsciiWriter(final OutputStream os) {
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this.os = os;
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numBytes = 0;
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}
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public void close() throws IOException {
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flush();
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os.close();
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}
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public void flush() throws IOException {
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os.write(buffer, 0, numBytes);
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numBytes = 0;
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os.flush();
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}
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public void write(final char[] chars, int offset, int length) throws IOException {
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while (length > 0) {
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final int charsToConvert = Math.min(length, buffer.length - numBytes);
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StringUtil.charsToBytes(chars, offset, charsToConvert, buffer, numBytes);
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numBytes += charsToConvert;
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offset += charsToConvert;
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length -= charsToConvert;
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if (numBytes == buffer.length) {
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os.write(buffer, 0, numBytes);
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numBytes = 0;
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}
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}
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}
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}
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