Konvertering til UTF-8

http://www.geocities.com/SiliconValley/Network/4453/unipatch/

udklip derfra:

Converting to UTF-8
Well, just save your files as UTF-8 :-)

Seriously, if you need a utility to do this, I know of a sledgehammer to do it. If you download one of the Java JDK's from Sun, it comes with a utility for characterset converions: native2ascii. Just convert from whatever characterset to escaped ASCII, and then convert from escaped ASCII to UTF-8 using the "-reverse" and "-encoding UTF8" options.

http://java.sun.com/products/jdk/1.1/docs/tooldocs/win32/native2ascii.html


Håber det hjælper.

Doh, jeg glemte at skrive det var til JAVA - men nu er problemet løst på en mindre elegant måde ;-)

denneher er da en lille smule elegant :-))

Den skulle klare denorme UTF8 sekvenser, men der er ingen test for ulovlige sekvenser.

class CodeUTF8 {
 
  static int[] mask = new int[6];
 
  static byte[] head = new byte[6];
 
  public CodeUTF8() {
      mask[0] = 0x0000007F;
      mask[1] = 0x000003FF;
      mask[2] = 0x0000FFFF;
      mask[3] = 0x001FFFFF;
      mask[4] = 0x03FFFFFF;
      mask[5] = 0x7FFFFFFF;
      head[0] = (byte)0x00;
      head[1] = (byte)0xC0;
      head[2] = (byte)0xE0;
      head[3] = (byte)0xF0;
      head[4] = (byte)0xF8;
      head[5] = (byte)0xFC;
  } //end CodeUTF8 constructor
 
  public byte[] toUTF8 ( int bogstav ) {
      int idx = 0;
      while ( bogstav > mask[idx] ) idx++;
      byte[] res = new byte[idx+1];
      for (int i=idx; i>0; i-- ) {
        res[i] = (byte)( 0x80 | ( bogstav & 0x3F ) );
        bogstav /= 0x40;
      }
      res[0] = (byte)( head[idx] | bogstav );
      return res;
  } //end toUTF8
 
  public int fromUTF8 ( byte[] utf8code ) {
      int idx = 5;
      while ( head[idx] > utf8code[0] ) idx--;
      int bogstav = utf8code[0] - head[idx];
      for (int i=1; i<=idx; i++ ) {
        bogstav = bogstav*0x40 +(0x3F & utf8code[i]);
      }
      return bogstav;
  } //end fromUTF8
 
 
  // koden herunder er kun til test.
 
  public static void main( String[] argv ) {
     
      CodeUTF8 utf = new CodeUTF8();
      int iform;    // charanter as 32-bit positivt heltal
      byte[] uform;  // character as UTF-8 kodet sekvens
     
      iform = 0x01234567;
      uform = utf.toUTF8( iform );
      System.out.println( "toUTF8(" + Integer.toString( iform, 16 )
                        +") ->" +txBytes(uform) );
      if ( (iform = utf.fromUTF8(uform) ) != 0x01234567 ) {
        System.out.println( "\nder er noget rivendes galt." );
      } else {
        System.out.println( "\nDet ser da meget godt ud :-))" );
      }
      System.out.println( "fromUTF8(" +txBytes(uform)+ ") -> "
                        +Integer.toString( iform, 16 ) );
      uform = utf.toUTF8( iform );
      System.out.println( "toUTF8(" + Integer.toString( iform, 16 )
                        +") ->" +txBytes(uform) );
      if ( (iform = utf.fromUTF8(uform) ) != 0x01234567 ) {
        System.out.println( "\nder er noget rivendes galt." );
      } else {
        System.out.println( "\nDet ser da meget godt ud :-))" );
      }
      System.out.println( "fromUTF8(" +txBytes(uform)+ ") -> "
                        +Integer.toString( iform, 16 ) );
  }
  public static String txBytes ( byte[] bArr ) {
      String res = "" +Integer.toString( 0xFF & (int)bArr[0], 16 );
      for (int i=1; i<bArr.length; i++ ) {
        res += "," +Integer.toString( 0xFF & (int)bArr[i], 16 );
      }
      return res;
  } //end txBytes
     
 
}; //endclas CodeUTF8