old-autovect-branch/libjava/gnu/gcj/convert/IOConverter.java

   1 /* Copyright (C) 2000, 2001, 2005  Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 /* This is a base class that handles aliasing issues for
  10    UnicodeToBytes to BytesToUnicode.  */
  11
  12 package gnu.gcj.convert;
  13
  14 import java.util.Hashtable;
  15
  16 public abstract class IOConverter
  17 {
  18   // Map encoding aliases to our canonical form.
  19   static private Hashtable hash = new Hashtable ();
  20
  21   // True if we have to do byte-order conversions on iconv()
  22   // arguments.
  23   static protected boolean iconv_byte_swap;
  24
  25   static
  26   {
  27     // Manually maintained aliases.  Note that the value must be our
  28     // canonical name.
  29     hash.put ("iso-latin-1", "8859_1");
  30     hash.put ("iso8859_1", "8859_1");
  31     hash.put ("utf-16le", "UnicodeLittle");
  32     hash.put ("utf-16be", "UnicodeBig");
  33     // At least one build script out there uses 'utf8'.
  34     hash.put ("utf8", "UTF8");
  35     // On Solaris the default encoding, as returned by nl_langinfo(),
  36     // is `646' (aka ASCII), but the Solaris iconv_open() doesn't
  37     // understand that.  We work around the problem by adding an
  38     // explicit alias for Solaris users.
  39     hash.put ("646", "ASCII");
  40
  41     // See PR 24552, PR 14358.
  42     hash.put ("euc_jp", "EUCJIS");
  43     hash.put ("eucjp", "EUCJIS");
  44
  45     // All aliases after this point are automatically generated by the
  46     // `encodings.pl' script.  Run it to make any corrections.
  47     hash.put ("ansi_x3.4-1968", "ASCII");
  48     hash.put ("ansi_x3.4-1986", "ASCII");
  49     hash.put ("ascii", "ASCII");
  50     hash.put ("cp367", "ASCII");
  51     hash.put ("cp819", "8859_1");
  52     hash.put ("csascii", "ASCII");
  53     hash.put ("cseucpkdfmtjapanese", "EUCJIS");
  54     hash.put ("csisolatin1", "8859_1");
  55     hash.put ("csshiftjis", "SJIS");
  56     hash.put ("euc-jp", "EUCJIS");
  57     hash.put ("extended_unix_code_packed_format_for_japanese", "EUCJIS");
  58     hash.put ("ibm367", "ASCII");
  59     hash.put ("ibm819", "8859_1");
  60     hash.put ("iso-8859-1", "8859_1");
  61     hash.put ("iso-ir-100", "8859_1");
  62     hash.put ("iso-ir-6", "ASCII");
  63     hash.put ("iso646-us", "ASCII");
  64     hash.put ("iso_646.irv:1991", "ASCII");
  65     hash.put ("iso_8859-1", "8859_1");
  66     hash.put ("iso_8859-1:1987", "8859_1");
  67     hash.put ("l1", "8859_1");
  68     hash.put ("latin1", "8859_1");
  69     hash.put ("ms_kanji", "SJIS");
  70     hash.put ("shift_jis", "SJIS");
  71     hash.put ("us", "ASCII");
  72     hash.put ("us-ascii", "ASCII");
  73     hash.put ("utf-8", "UTF8");
  74     hash.put ("utf16-be", "UnicodeBig");
  75     hash.put ("utf16-le", "UnicodeLittle");
  76     // End script-generated section.
  77
  78     iconv_byte_swap = iconv_init ();
  79   }
  80
  81   private static native boolean iconv_init ();
  82
  83   // Turn an alias into the canonical form.
  84   protected static final String canonicalize (String name)
  85   {
  86     String c = (String) hash.get (name.toLowerCase ());
  87     return c == null ? name : c;
  88   }
  89 }