Re: Problem converting the Unicode character (U2225) to SJIS

[George R. <gr...@us...>]

That |1 symbol means that it's a fallback mapping.  This means that you 
may be losing information during the conversion process.  A fallback 
mapping does not roundtrip.

If you would like to enable fallback mappings, please use the 
ucnv_setFallback() function to enable fallbacks.

George Rhoten
IBM Globalization Center of Competency/ICU  San Jose, CA, USA




Yan Li <ya...@es...>
Sent by: icu...@os...
04/29/2003 03:24 PM

 
        To:     "'icu...@os...'" 
<icu...@os...>
        cc: 
        Subject:        Problem converting the Unicode character (U2225) to SJIS



Hi,

I'm trying to use ucnv_fromUChars() or UnicodeString.extract() to convert
the Unicode character (U2225) to SJIS. I got 0x81A1 instead of 0x8161. I
looked at the mapping table ibm-943_P14A-2000.ucm. There is a line as 
this:

<U2225> \x81\x61 |1

I assume this maps the Unicode character U2225 to 0x8161 in SJIS (or
ibm-943_P14A-2000) while converting the Unicode character to SJIS
(ibm-943_P14A-2000). However I got 0x81A1 instead. Please see the testing
program below. Did I do something wrong here or is it a ICU converter
problem?

#include <windows.h>
#include <stdio.h>
#include <unicode/unistr.h>
#include <unicode/ustring.h>
#include <unicode/ucnv.h>

int main(int argc, char* argv[])
{
UChar ch = 0x2225;
UnicodeString ustr(ch);

char* pCharBuffer = new char[ustr.length() * 2 + 1];

int32_t len = ustr.extract( 0, ustr.length(), pCharBuffer,
"ibm-943_P14A-2000" );
//pCharBuffer = 0x81 0xA1 0x00

UConverter* conv;
UErrorCode status=U_ZERO_ERROR;

conv = ucnv_open("ibm-943_P14A-2000", &status);

len=ucnv_fromUChars(conv, pCharBuffer, ustr.length() * 2 + 1, &ch, 1,
&status);
//pCharBuffer = 0x81 0xA1 0x00

ucnv_close(conv);

delete[] pCharBuffer;

return 0;
}

-------------------------------------------------
Yan Li

ESRI
Tel: (909) 793-2853 Ext. 2063
--------------------------------------------------

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