Re: [kaffe] Slow byte to char conversion
Am Die, 29 Aug 2000 schrieb Dalibor Topic: > > Is it not fair to assume that converting n bytes will result in less than > > or equal to n characters? > > For most of encodings that I've seen, it is a safe assumption. > Unfortunately, I haven't seen 'em all :) > > I'm suspicious that it's > possible to have a byte encode several characters. I digged around Unicode.org today, to see if I can find some interesting mappings from native character sets to Unicode which violate that assumption. I've found the Devagari and Farsi encodings from Apple. Here is an example from MacFarsi, the character set used to encode Persian. It's online at: http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/FARSI.TXT # For example, the mapping of 0x2B is given as +0x002B; the # mapping of 0xAB is given as +0x002B. If we map an isolated # instance of 0x2B to Unicode, it should be mapped as follows (LRO # indicates LEFT-RIGHT OVERRIDE, PDF indicates POP DIRECTION # FORMATTING): # # 0x2B -> 0x202D (LRO) + 0x002B (PLUS SIGN) + 0x202C (PDF) So, in this case, a single Mac OS Farsi code point results in three Unicode characters. It can actually get even worse: # In the TrueType variant of Mac OS Farsi, 0xA4 is a ligature for the # currency unit "rial". This is mapped using the grouping hint followed # by the Arabic characters for "rial" # # (TrueType variant) 0xA4 -> 0xF86B+0x0631+0x064A+0x0627+0x0644 Here you have a single code point encoded by five (5) Unicode characters. The grouping hint seems to be a vendor specific extension from Apple, though. That's still 4:1. Sun doesn't seem to have included any Farsi or Devangari conversion mechanisms, so kaffe doesn't really have to support such exotic encodings. But ... it may one day. So I'd recommend staying on the safe side. Dali _ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
Re: Questions about Kaffe RMI!!
David Ramirez writes: > I have been working with Kaffe 1.0.6 (Thanks Archie for the advice) and > RMI. In a local level it works fine (Server/Client in the same > machine), but when I try to connect Kaffe's RMI (As Server or as > Client) to another machine (with JDK's1.1.8 RMI as Server or Client) it > does not work, there is an exception: > > java.lang.reflect.InvocationTargetException > and then: java.rmi.UnExpectedException: nested exception is: null > > Well, I would like to know (I would really appreciate any answer, please > :) ) : > > Does anyone knows how to Solve the problem? > > Does anyone knows how to comunicate Kaffe's RMI with another VM (J.D.K > RMI remote) ? > > Has anyone work with Kaffe and RMI ? Is there a secret or something in > order to make RMI run under Kaffe? > > I think that Kaffe does not work with RMI. !! You may be right. I don't know of anyone who has got it working in a non-trivial application. I think this area is ripe for someone to come in and fix a few things. -Archie ___ Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com
Questions about Kaffe RMI!!
Hi I have been working with Kaffe 1.0.6 (Thanks Archie for the advice) and RMI. In a local level it works fine (Server/Client in the same machine), but when I try to connect Kaffe's RMI (As Server or as Client) to another machine (with JDK's1.1.8 RMI as Server or Client) it does not work, there is an exception: java.lang.reflect.InvocationTargetException and then: java.rmi.UnExpectedException: nested exception is: null Well, I would like to know (I would really appreciate any answer, please :) ) : Does anyone knows how to Solve the problem? Does anyone knows how to comunicate Kaffe's RMI with another VM (J.D.K RMI remote) ? Has anyone work with Kaffe and RMI ? Is there a secret or something in order to make RMI run under Kaffe? I think that Kaffe does not work with RMI. !! Thanks in advance for your answers =) Bye, David Ramirez G.
