110 lines
3.1 KiB
Java
110 lines
3.1 KiB
Java
/* Copyright (C) 1999 Red Hat, Inc.
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package gnu.gcj.convert;
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public abstract class UnicodeToBytes
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{
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/** Buffer to emit bytes to.
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* The locations buf[count] ... buf[buf.length-1] are available. */
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public byte[] buf;
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public int count;
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static Class defaultEncodingClass;
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static synchronized void getDefaultEncodingClass()
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{
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// Test (defaultEncodingClass == null) again in case of race condition.
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if (defaultEncodingClass == null)
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{
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String encoding = System.getProperty("file.encoding");
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String className = "gnu.gcj.convert.Output_"+encoding;
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try
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{
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defaultEncodingClass = Class.forName(className);
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}
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catch (ClassNotFoundException ex)
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{
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throw new NoClassDefFoundError("missing default encoding "
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+ encoding + " (class "
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+ className + " not found)");
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}
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}
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}
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public abstract String getName();
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public static UnicodeToBytes getDefaultEncoder()
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{
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try
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{
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if (defaultEncodingClass == null)
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getDefaultEncodingClass();
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return (UnicodeToBytes) defaultEncodingClass.newInstance();
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}
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catch (Throwable ex)
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{
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return new Output_8859_1();
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}
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}
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/** Get a char-stream->byte-stream converter given an encoding name. */
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public static UnicodeToBytes getEncoder (String encoding)
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throws java.io.UnsupportedEncodingException
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{
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String className = "gnu.gcj.convert.Output_"+encoding;
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Class encodingClass;
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try
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{
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encodingClass = Class.forName(className);
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return (UnicodeToBytes) encodingClass.newInstance();
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}
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catch (Throwable ex)
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{
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throw new java.io.UnsupportedEncodingException(encoding + " ("
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+ ex + ')');
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}
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}
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public final void setOutput(byte[] buffer, int count)
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{
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this.buf = buffer;
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this.count = count;
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}
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/** Convert chars to bytes.
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* Converted bytes are written to buf, starting at count.
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* @param inbuffer source of characters to convert
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* @param inpos index of initial character in inbuffer to convert
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* @param inlength number of characters to convert
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* @return number of chars converted
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* Also, this.count is increment by the number of bytes converted.
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*/
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public abstract int write (char[] inbuffer, int inpos, int inlength);
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/** Convert chars to bytes.
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* Converted bytes are written to buf, starting at count.
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* @param str source of characters to convert
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* @param inpos index of initial character in str to convert
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* @param inlength number of characters to convert
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* @param work if non-null, a buffer than can be used
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* @return number of chars converted
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* Also, this.count is increment by the number of bytes converted.
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*/
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public int write (String str, int inpos, int inlength, char[] work)
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{
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if (work == null)
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work = new char[inlength];
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int srcEnd = inpos + (inlength > work.length ? work.length : inlength);
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str.getChars(inpos, srcEnd, work, 0);
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return write(work, inpos, inlength);
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}
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}
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