Initial revision

From-SVN: r26263

libjava/gnu/gcj/convert/UnicodeToBytes.java

@@ -0,0 +1,90 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.convert; 
+ 
+public abstract class UnicodeToBytes
+{
+  /** Buffer to emit bytes to.
+   * The locations buf[count] ... buf[buf.length-1] are available. */
+  public byte[] buf;
+  public int count;
+
+  static Class defaultEncodingClass;
+
+  static synchronized void getDefaultEncodingClass()
+  {
+    // Test (defaultEncodingClass == null) again in case of race condition.
+    if (defaultEncodingClass == null)
+      {
+	String encoding = System.getProperty("file.encoding");
+	String className = "gnu.gcj.convert.Output_"+encoding;
+	try
+	  {
+	    defaultEncodingClass = Class.forName(className);
+	  }
+	catch (ClassNotFoundException ex)
+	  {
+	    throw new NoClassDefFoundError("missing default encoding "
+					   + encoding + " (class "
+					   + className + " not found)");
+	    
+	  }
+      }
+  }
+
+  public abstract String getName();
+
+  public static UnicodeToBytes getDefaultEncoder()
+  {
+    try
+      {
+	if (defaultEncodingClass == null)
+	  getDefaultEncodingClass();
+	return (UnicodeToBytes) defaultEncodingClass.newInstance();
+      }
+    catch (Throwable ex)
+      {
+	return new Output_8859_1();
+      }
+  }
+
+  /** Get a char-stream->byte-stream converter given an encoding name. */
+  public static UnicodeToBytes getEncoder (String encoding)
+    throws java.io.UnsupportedEncodingException
+  {
+    String className = "gnu.gcj.convert.Output_"+encoding;
+    Class encodingClass;
+    try 
+      { 
+	encodingClass = Class.forName(className); 
+	return (UnicodeToBytes) encodingClass.newInstance();
+      } 
+    catch (Throwable ex) 
+      { 
+	throw new java.io.UnsupportedEncodingException(encoding + " ("
+						       + ex + ')');
+      }
+  }
+
+  public final void setOutput(byte[] buffer, int count)
+  {
+    this.buf = buffer;
+    this.count = count;
+  }
+
+  /** Convert chars to bytes.
+    * Converted bytes are written to buf, starting at count.
+    * @param inbuffer sources of characters to convert
+    * @param inpos index of initial character ininbuffer to convert
+    * @param inlength number of characters to convert
+    * @return number of chars converted
+    * Also, this.count is increment by the number of bytes converted.
+    */
+  public abstract int write (char[] inbuffer, int inpos, int inlength);
+}