encodings.pl: Added `ASCII' alias.

* scripts/encodings.pl: Added `ASCII' alias.
	* Makefile.in: Rebuilt.
	* Makefile.am (convert_source_files): Added new files.
	* gnu/gcj/convert/Input_ASCII.java: New file.
	* gnu/gcj/convert/Output_ASCII.java: New file.
	* gnu/gcj/convert/Output_8859_1.java (write): Use `?' to represent
	out-of-range characters.
	* gnu/gcj/convert/natIconv.cc (iconv_init): New method.
	(read): Swap bytes if required.  Treat `count' as character count,
	not byte count.
	(write): Likewise.  Also, handle case where iconv fails on a given
	character.
	(init): Put encoding into exception.
	* gnu/gcj/convert/IOConverter.java (iconv_byte_swap): New global.
	(static): Call iconv_init.  Rebuilt alias list.
	(iconv_init): New private method.

From-SVN: r37190

libjava/gnu/gcj/convert/Output_ASCII.java

@@ -0,0 +1,54 @@
+/* Copyright (C) 2000  Free Software Foundation
+
+   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; 
+ 
+/**
+ * Convert Unicode ASCII
+ * Unrecognized characters are printed as `?'.
+ * @date October 2000
+ */
+
+public class Output_ASCII extends UnicodeToBytes
+{
+  public String getName() { return "ASCII"; }
+
+  /**
+   * @return number of chars converted. */
+  public int write (char[] inbuffer, int inpos, int inlength)
+  {
+    int count = this.count;
+    byte[] buf = this.buf;
+    int avail = buf.length - count;
+    if (inlength > avail)
+      inlength = avail;
+    for (int i = inlength;  --i >= 0;  )
+      {
+	char c = inbuffer[inpos++];
+	buf[count++] = (byte) ((c > 0x7f) ? '?' : c);
+      }
+    this.count = count;
+    return inlength;
+  }
+
+  public int write (String str, int inpos, int inlength, char[] work)
+  {
+    int count = this.count;
+    byte[] buf = this.buf;
+    int avail = buf.length - count;
+    if (inlength > avail)
+      inlength = avail;
+    for (int i = inlength;  --i >= 0;  )
+      {
+	char c = str.charAt(inpos++);
+	buf[count++] = (byte) ((c > 0x7f) ? '?' : c);
+      }
+    this.count = count;
+    return inlength;
+  }
+}