Validating utf 8 consolidating superannuation form

The underlying problem with UTF-8 is its multi-byte encoding mechanism.

Remember your one line C/C character iterator loop? In Ruby-land, full unicode support is still lacking (by default), but it is expected that the long awaited Ruby 1.9/2.0 will become unicode-safe.

This website also reports that the input (0x EFBFBD) is undefined for unicode. Please let me know what is wrong with this attempt at validating UTF8. What I thought was wrong was not getting an exception from the decoder in my sample program.

In my sample program the first three bytes of test data that should be UTF8 are: 0x EFBFBD .

By Ilya Grigorik on April 11, 2007 Approximately 64.2 percent of online users do not speak English.

It's a leaky abstraction, and we need to address some of these leaks.After a lot of web searches, I came across Charset Decoder and created the program below. Coding Error Action; public class Uni Test { private static final byte[] uni Bytes = ; public static void main(String[] args) { Byte Buffer uni Buf = Byte Buffer.wrap(uni Bytes); Char Buffer char Buf = null; Charset Decoder utf8Decoder = Name("UTF-8")Decoder(); utf8Malformed Input(Coding Error Action.The "-17, -65 and -67" values are the signed byte representations of the funny characters in one of the database fields. REPORT); utf8Unmappable Character(Coding Error Action. REPORT); try { char Buf = utf8Decoder.decode(uni Buf); for (int i=0; i What makes you think there's anything wrong with it?Errors in XML documents will stop your XML applications.The W3C XML specification states that a program should stop processing an XML document if it finds an error.Over the years, a number of new standards (UTF-7, UTF-8, CESU-8, UTF-16/UCS-2, etc.) have been developed to address this need, but UTF-8 emerged as the de facto standard.To fully appreciate some of the complexities of the task, and to better understand the leaks, I would strongly recommend that you take the time and read Joel Spolsky's The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets.The reason is that XML software should be small, fast, and compatible.HTML browsers are allowed to display HTML documents with errors (like missing end tags). A "well formed" XML document is not the same as a "valid" XML document. In addition, it must conform to a document type definition./* ** $Id: lutf8lib.c,v 1.15 2015/03/28 roberto Exp $ ** Standard library for UTF-8 manipulation ** See Copyright Notice in lua.h */ #define lutf8lib_c #define LUA_LIB #include "lprefix.h" #include #include "lua.h" #include "lauxlib.h" #include "lualib.h" #define MAXUNICODE 0x10FFFF #define iscont(p) ((*(p) & 0x C0) == 0x80) /* CHN BEGIN */ static size_t recode(char **d, size_t *d Len, const char **o, size_t *o Len, int b Long Nuls, int b Surrogates) /* ** utf8.validate(s [, allow Long Nulls [, allow Surrogates) -- ** valid UTF-8 string ** boolean which indicates if source string had valid ** characters only.*/ static int utf8_validate (lua_State *L) /* CHN END */ /* from strlib */ /* translate a relative string position: negative means back from end */ static lua_Integer u_posrelat (lua_Integer pos, size_t len) /* ** Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.

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