32
|
1 |
/*
|
|
2 |
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
3 |
* All rights reserved.
|
|
4 |
* This component and the accompanying materials are made available
|
|
5 |
* under the terms of the License "Eclipse Public License v1.0"
|
|
6 |
* which accompanies this distribution, and is available
|
|
7 |
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
8 |
*
|
|
9 |
* Initial Contributors:
|
|
10 |
* Nokia Corporation - initial contribution.
|
|
11 |
*
|
|
12 |
* Contributors:
|
|
13 |
*
|
|
14 |
* Description: ISO2022kr conversion plugin
|
|
15 |
*
|
|
16 |
*/
|
|
17 |
|
|
18 |
// INCLUDES
|
|
19 |
#include <e32std.h>
|
|
20 |
#include <charconv.h>
|
|
21 |
#include <convgeneratedcpp.h>
|
|
22 |
#include <ecom/implementationproxy.h>
|
|
23 |
#include "cp949table.h"
|
|
24 |
#include "charactersetconverter.h"
|
|
25 |
|
|
26 |
static const TUint KBitsForNonStandardStates = 0x03;
|
|
27 |
static const TUint KShiftedToKSCState = 0x01;
|
|
28 |
|
|
29 |
static const TUint KMaxSizeOfTmpBuffer = 1024;
|
|
30 |
|
|
31 |
static const TUint8 KMaxAscii = 0x9f;
|
|
32 |
|
|
33 |
_LIT8(KLit8EscapeSequence, "\x1b\x24\x43");
|
|
34 |
|
|
35 |
#define SHIFT_IN_BYTE 0x0F
|
|
36 |
#define SHIFT_OUT_BYTE 0x0E
|
|
37 |
|
|
38 |
typedef enum
|
|
39 |
{
|
|
40 |
EISO2022Initialize,
|
|
41 |
EISO2022Ascii,
|
|
42 |
EISO2022KSC
|
|
43 |
} TISO2022FromUniState;
|
|
44 |
|
|
45 |
// New Interface class
|
|
46 |
class CISO2022KRImplementation : public CCharacterSetConverterPluginInterface
|
|
47 |
{
|
|
48 |
public:
|
|
49 |
virtual const TDesC8& ReplacementForUnconvertibleUnicodeCharacters();
|
|
50 |
|
|
51 |
virtual TInt ConvertFromUnicode(
|
|
52 |
CCnvCharacterSetConverter::TEndianness aDefaultEndiannessOfForeignCharacters,
|
|
53 |
const TDesC8& aReplacementForUnconvertibleUnicodeCharacters,
|
|
54 |
TDes8& aForeign,
|
|
55 |
const TDesC16& aUnicode,
|
|
56 |
CCnvCharacterSetConverter::TArrayOfAscendingIndices& aIndicesOfUnconvertibleCharacters );
|
|
57 |
|
|
58 |
virtual TInt ConvertToUnicode(
|
|
59 |
CCnvCharacterSetConverter::TEndianness aDefaultEndiannessOfForeignCharacters,
|
|
60 |
TDes16& aUnicode,
|
|
61 |
const TDesC8& aForeign,
|
|
62 |
TInt& aState,
|
|
63 |
TInt& aNumberOfUnconvertibleCharacters,
|
|
64 |
TInt& aIndexOfFirstByteOfFirstUnconvertibleCharacter );
|
|
65 |
|
|
66 |
virtual TBool IsInThisCharacterSetL(
|
|
67 |
TBool& aSetToTrue,
|
|
68 |
TInt& aConfidenceLevel,
|
|
69 |
const TDesC8& );
|
|
70 |
|
|
71 |
static CISO2022KRImplementation* NewL();
|
|
72 |
|
|
73 |
virtual ~CISO2022KRImplementation();
|
|
74 |
private:
|
|
75 |
CISO2022KRImplementation();
|
|
76 |
};
|
|
77 |
|
|
78 |
// FUNCTION DEFINITIONS
|
|
79 |
const TDesC8& CISO2022KRImplementation::ReplacementForUnconvertibleUnicodeCharacters()
|
|
80 |
{
|
|
81 |
return CnvCp949Table::ReplacementForUnconvertibleUnicodeCharacters();
|
|
82 |
}
|
|
83 |
|
|
84 |
TInt CISO2022KRImplementation::ConvertFromUnicode(
|
|
85 |
CCnvCharacterSetConverter::TEndianness aDefaultEndiannessOfForeignCharacters,
|
|
86 |
const TDesC8& aReplacementForUnconvertibleUnicodeCharacters,
|
|
87 |
TDes8& aForeign,
|
|
88 |
const TDesC16& aUnicode,
|
|
89 |
CCnvCharacterSetConverter::TArrayOfAscendingIndices& aIndicesOfUnconvertibleCharacters)
|
|
90 |
{
|
|
91 |
TInt ret;
|
|
92 |
TInt currPos = 3;
|
|
93 |
TUint outputConversionFlags = 0;
|
|
94 |
TUint inputConversionFlags = CCnvCharacterSetConverter::EInputConversionFlagAppend;
|
|
95 |
TISO2022FromUniState currState = EISO2022Initialize;
|
|
96 |
TUint8 shiftByte = 0;
|
|
97 |
TPtr8 shiftBytePtr(NULL, 0);
|
|
98 |
|
|
99 |
aForeign.SetLength(0);
|
|
100 |
|
|
101 |
/* Start with escape sequence */
|
|
102 |
aForeign.Append( KLit8EscapeSequence );
|
|
103 |
|
|
104 |
ret = CCnvCharacterSetConverter::DoConvertFromUnicode( CnvCp949Table::ConversionData(),
|
|
105 |
aDefaultEndiannessOfForeignCharacters,
|
|
106 |
aReplacementForUnconvertibleUnicodeCharacters,
|
|
107 |
aForeign,
|
|
108 |
aUnicode,
|
|
109 |
aIndicesOfUnconvertibleCharacters,
|
|
110 |
outputConversionFlags,
|
|
111 |
inputConversionFlags );
|
|
112 |
/* Append shift in and out bytes as needed */
|
|
113 |
while( currPos < aForeign.Length() )
|
|
114 |
{
|
|
115 |
TUint8 *currChar = (TUint8 *)aForeign.Mid(currPos).Ptr();
|
|
116 |
if( *currChar > KMaxAscii )
|
|
117 |
{ /* KSC character */
|
|
118 |
if( currState != EISO2022KSC )
|
|
119 |
{ /* Insert shift out byte */
|
|
120 |
shiftByte = SHIFT_OUT_BYTE;
|
|
121 |
currState = EISO2022KSC;
|
|
122 |
}
|
|
123 |
|
|
124 |
/* Clear the 8th bit */
|
|
125 |
*currChar = (*currChar & ~(0x80));
|
|
126 |
}
|
|
127 |
else
|
|
128 |
{ /* ASCII character */
|
|
129 |
if( currState != EISO2022Ascii )
|
|
130 |
{ /* Insert shift in byte */
|
|
131 |
shiftByte = SHIFT_IN_BYTE;
|
|
132 |
currState = EISO2022Ascii;
|
|
133 |
}
|
|
134 |
}
|
|
135 |
|
|
136 |
if( shiftByte )
|
|
137 |
{
|
|
138 |
if( (aForeign.Length() + 1) > aForeign.MaxLength() )
|
|
139 |
{ /* Make room for shift byte */
|
|
140 |
if( aForeign[ (aForeign.Length() - 1) ] > KMaxAscii )
|
|
141 |
{ /* Drop a dual byte KSC character */
|
|
142 |
aForeign.SetLength( aForeign.Length() - 2 );
|
|
143 |
}
|
|
144 |
else
|
|
145 |
{ /* Drop a single byte ASCII character */
|
|
146 |
aForeign.SetLength( aForeign.Length() - 1 );
|
|
147 |
}
|
|
148 |
/* Increase unconverted amount */
|
|
149 |
ret++;
|
|
150 |
/* TBD, propably should try to fix aIndicesOfUnconvertibleCharacters
|
|
151 |
if possible */
|
|
152 |
}
|
|
153 |
shiftBytePtr.Set( &shiftByte, 1, 1 );
|
|
154 |
aForeign.Insert( currPos, shiftBytePtr );
|
|
155 |
currPos++;
|
|
156 |
shiftByte = 0;
|
|
157 |
}
|
|
158 |
|
|
159 |
/* Skip current character */
|
|
160 |
currPos++;
|
|
161 |
}
|
|
162 |
|
|
163 |
return ret;
|
|
164 |
}
|
|
165 |
|
|
166 |
TInt CISO2022KRImplementation::ConvertToUnicode(
|
|
167 |
CCnvCharacterSetConverter::TEndianness aDefaultEndiannessOfForeignCharacters,
|
|
168 |
TDes16& aUnicode,
|
|
169 |
const TDesC8& aForeign,
|
|
170 |
TInt& aState,
|
|
171 |
TInt& aNumberOfUnconvertibleCharacters,
|
|
172 |
TInt& aIndexOfFirstByteOfFirstUnconvertibleCharacter)
|
|
173 |
{
|
|
174 |
TInt err;
|
|
175 |
TInt ret = 0;
|
|
176 |
TInt currPos = 0;
|
|
177 |
TInt convPos = 0;
|
|
178 |
TInt shiftInPos = KErrNotFound;
|
|
179 |
TInt shiftOutPos = KErrNotFound;
|
|
180 |
TInt shiftPos = KErrNotFound;
|
|
181 |
TInt escPos = KErrNotFound;
|
|
182 |
TPtrC8 currSegment;
|
|
183 |
TPtrC8 convSegment;
|
|
184 |
TBool changeState = EFalse;
|
|
185 |
|
|
186 |
TUint outputConversionFlags = 0;
|
|
187 |
TUint inputConversionFlags = CCnvCharacterSetConverter::EInputConversionFlagAppend;
|
|
188 |
TInt numberOfUnconvertibleCharacters = 0;
|
|
189 |
TInt indexOfFirstByteOfFirstUnconvertibleCharacter = 0;
|
|
190 |
aNumberOfUnconvertibleCharacters = 0;
|
|
191 |
|
|
192 |
while( currPos < aForeign.Length() )
|
|
193 |
{
|
|
194 |
|
|
195 |
currSegment.Set( aForeign.Mid( currPos ) );
|
|
196 |
|
|
197 |
/* First change state if needed */
|
|
198 |
if( changeState )
|
|
199 |
{
|
|
200 |
changeState = EFalse;
|
|
201 |
if( (aState & KBitsForNonStandardStates) == KShiftedToKSCState )
|
|
202 |
{ /* Switch back to default ASCII */
|
|
203 |
aState &= ~(KShiftedToKSCState);
|
|
204 |
}
|
|
205 |
else
|
|
206 |
{ /* Switch to KSC */
|
|
207 |
aState |= KShiftedToKSCState;
|
|
208 |
}
|
|
209 |
}
|
|
210 |
|
|
211 |
/* Search for escape which should be skipped */
|
|
212 |
escPos = currSegment.Find( KLit8EscapeSequence );
|
|
213 |
|
|
214 |
/* Search for shift in byte */
|
|
215 |
shiftInPos = currSegment.Locate( SHIFT_IN_BYTE );
|
|
216 |
|
|
217 |
/* Search for shift out byte */
|
|
218 |
shiftOutPos = currSegment.Locate( SHIFT_OUT_BYTE );
|
|
219 |
|
|
220 |
/* Set shift pos according to found shift bytes */
|
|
221 |
if( shiftInPos == KErrNotFound &&
|
|
222 |
shiftOutPos == KErrNotFound )
|
|
223 |
{ /* Neither found */
|
|
224 |
shiftPos = KErrNotFound;
|
|
225 |
}
|
|
226 |
else
|
|
227 |
{
|
|
228 |
if( (shiftInPos != KErrNotFound) &&
|
|
229 |
((shiftInPos < shiftOutPos) || (shiftOutPos == KErrNotFound)) )
|
|
230 |
{ /* shift in is nearer or shift out not found */
|
|
231 |
shiftPos = shiftInPos;
|
|
232 |
/* Set state change if needed */
|
|
233 |
if( (aState & KBitsForNonStandardStates) == KShiftedToKSCState )
|
|
234 |
{
|
|
235 |
changeState = ETrue;
|
|
236 |
}
|
|
237 |
}
|
|
238 |
else
|
|
239 |
{ /* shift out must be nearer or shift in not fouind */
|
|
240 |
shiftPos = shiftOutPos;
|
|
241 |
/* Set state change if needed */
|
|
242 |
if( (aState & KBitsForNonStandardStates) != KShiftedToKSCState )
|
|
243 |
{
|
|
244 |
changeState = ETrue;
|
|
245 |
}
|
|
246 |
}
|
|
247 |
}
|
|
248 |
|
|
249 |
if( shiftPos == KErrNotFound )
|
|
250 |
{ /* Shift byte not found, same coding for the rest of the data */
|
|
251 |
if( escPos == KErrNotFound )
|
|
252 |
{ /* No escape sequence either, just convert the rest */
|
|
253 |
convSegment.Set( currSegment );
|
|
254 |
}
|
|
255 |
}
|
|
256 |
else if( ((escPos != KErrNotFound) && (shiftPos < escPos)) ||
|
|
257 |
(escPos == KErrNotFound) )
|
|
258 |
{ /* Shift byte found and it comes before escape sequence or no escape
|
|
259 |
sequence was found, convert data preceeding the shift byte if shift
|
|
260 |
byte isn't the first character */
|
|
261 |
if( shiftPos == 0 )
|
|
262 |
{ /* No data to convert preceeds the shift byte, just skip it and continue */
|
|
263 |
currPos += 1;
|
|
264 |
continue;
|
|
265 |
}
|
|
266 |
convSegment.Set( currSegment.Left( shiftPos ) );
|
|
267 |
/* Clear to prevent convert to escape sequence */
|
|
268 |
escPos = KErrNotFound;
|
|
269 |
}
|
|
270 |
|
|
271 |
if( escPos != KErrNotFound )
|
|
272 |
{ /* Escape sequence found before any shift bytes,
|
|
273 |
clear possible state change and convert data
|
|
274 |
preceeding the escape sequence if
|
|
275 |
escape sequence is not at the beginning */
|
|
276 |
changeState = EFalse;
|
|
277 |
if( escPos == 0 )
|
|
278 |
{ /* No data to convert preceeds the escape sequence, just skip it continue */
|
|
279 |
currPos += KLit8EscapeSequence().Length();
|
|
280 |
continue;
|
|
281 |
}
|
|
282 |
convSegment.Set( currSegment.Left( escPos ) );
|
|
283 |
}
|
|
284 |
|
|
285 |
if( (aState & KBitsForNonStandardStates) == KShiftedToKSCState )
|
|
286 |
{ /* Convert KSC encoded */
|
|
287 |
HBufC8 *tmpForeign = NULL;
|
|
288 |
|
|
289 |
if( (convSegment.Length() & 0x1) )
|
|
290 |
{ /* KSC should have even amount of bytes */
|
|
291 |
ret = CCnvCharacterSetConverter::EErrorIllFormedInput;
|
|
292 |
}
|
|
293 |
else
|
|
294 |
{
|
|
295 |
convPos = 0;
|
|
296 |
while( convPos < convSegment.Length() )
|
|
297 |
{
|
|
298 |
TRAP( err, tmpForeign = HBufC8::NewL( KMaxSizeOfTmpBuffer ) );
|
|
299 |
if( err != KErrNone )
|
|
300 |
{
|
|
301 |
User::Panic( _L("ISO-2022-KR"), err );
|
|
302 |
}
|
|
303 |
|
|
304 |
if( convSegment.Length() < KMaxSizeOfTmpBuffer )
|
|
305 |
{ /* Convert whole segment */
|
|
306 |
tmpForeign->Des().Copy( convSegment );
|
|
307 |
}
|
|
308 |
else
|
|
309 |
{ /* Convert in chunks */
|
|
310 |
if( (convPos + KMaxSizeOfTmpBuffer) >= convSegment.Length() )
|
|
311 |
{ /* Last chunk */
|
|
312 |
tmpForeign->Des().Copy( convSegment.Mid( convPos ) );
|
|
313 |
}
|
|
314 |
else
|
|
315 |
{
|
|
316 |
tmpForeign->Des().Copy( convSegment.Mid( convPos, KMaxSizeOfTmpBuffer ) );
|
|
317 |
}
|
|
318 |
}
|
|
319 |
|
|
320 |
TUint8 *chars = (TUint8 *)tmpForeign->Des().Ptr();
|
|
321 |
for( TInt i = 0 ; i < tmpForeign->Length() ; i++ )
|
|
322 |
{ /* Set highest bit in characters */
|
|
323 |
chars[i] |= 0x80;
|
|
324 |
}
|
|
325 |
|
|
326 |
numberOfUnconvertibleCharacters = 0;
|
|
327 |
ret = CCnvCharacterSetConverter::DoConvertToUnicode( CnvCp949Table::ConversionData(),
|
|
328 |
aDefaultEndiannessOfForeignCharacters,
|
|
329 |
aUnicode, *tmpForeign,
|
|
330 |
numberOfUnconvertibleCharacters,
|
|
331 |
indexOfFirstByteOfFirstUnconvertibleCharacter,
|
|
332 |
outputConversionFlags,
|
|
333 |
inputConversionFlags );
|
|
334 |
if( numberOfUnconvertibleCharacters != 0 &&
|
|
335 |
aNumberOfUnconvertibleCharacters == 0 )
|
|
336 |
{ /* First uncovertible found, set index relative to actual input buffer*/
|
|
337 |
aIndexOfFirstByteOfFirstUnconvertibleCharacter = (currPos + convPos + indexOfFirstByteOfFirstUnconvertibleCharacter);
|
|
338 |
}
|
|
339 |
|
|
340 |
aNumberOfUnconvertibleCharacters += numberOfUnconvertibleCharacters;
|
|
341 |
|
|
342 |
if( ret < 0 )
|
|
343 |
{ /* Some error, break the loop,
|
|
344 |
errors are handled later */
|
|
345 |
delete tmpForeign;
|
|
346 |
break;
|
|
347 |
}
|
|
348 |
|
|
349 |
if( ret > 0 )
|
|
350 |
{ /* Not all were converted, fix return value
|
|
351 |
to be relative to convSegment and break the loop */
|
|
352 |
ret = (convSegment.Length() - convPos - tmpForeign->Length() + ret);
|
|
353 |
delete tmpForeign;
|
|
354 |
break;
|
|
355 |
}
|
|
356 |
|
|
357 |
convPos += tmpForeign->Length();
|
|
358 |
delete tmpForeign;
|
|
359 |
}
|
|
360 |
}
|
|
361 |
}
|
|
362 |
else
|
|
363 |
{ /* Convert ASCII encoded by default, KSC can be used without setting highest bit */
|
|
364 |
numberOfUnconvertibleCharacters = 0;
|
|
365 |
ret = CCnvCharacterSetConverter::DoConvertToUnicode( CnvCp949Table::ConversionData(),
|
|
366 |
aDefaultEndiannessOfForeignCharacters,
|
|
367 |
aUnicode, convSegment,
|
|
368 |
numberOfUnconvertibleCharacters,
|
|
369 |
indexOfFirstByteOfFirstUnconvertibleCharacter,
|
|
370 |
outputConversionFlags,
|
|
371 |
inputConversionFlags );
|
|
372 |
if( numberOfUnconvertibleCharacters != 0 &&
|
|
373 |
aNumberOfUnconvertibleCharacters == 0 )
|
|
374 |
{ /* First uncovertible found, set index relative to actual input buffer*/
|
|
375 |
aIndexOfFirstByteOfFirstUnconvertibleCharacter = currPos + indexOfFirstByteOfFirstUnconvertibleCharacter;
|
|
376 |
}
|
|
377 |
aNumberOfUnconvertibleCharacters += numberOfUnconvertibleCharacters;
|
|
378 |
}
|
|
379 |
|
|
380 |
if( ret < 0 )
|
|
381 |
{ /* Error during conversion */
|
|
382 |
return ret;
|
|
383 |
}
|
|
384 |
else if( ret > 0 )
|
|
385 |
{ /* Not all characters where converted, return
|
|
386 |
value indicating how many bytes in total are left unconverted */
|
|
387 |
return (aForeign.Length() - currPos - convSegment.Length() + ret);
|
|
388 |
}
|
|
389 |
|
|
390 |
/* Increase to skip converted data */
|
|
391 |
currPos += convSegment.Length();
|
|
392 |
if( escPos != KErrNotFound )
|
|
393 |
{ /* Increase to skip escape sequence */
|
|
394 |
currPos += KLit8EscapeSequence().Length();
|
|
395 |
}
|
|
396 |
else if( shiftPos != KErrNotFound )
|
|
397 |
{ /* Increase to skip shift byte */
|
|
398 |
currPos += 1;
|
|
399 |
}
|
|
400 |
|
|
401 |
}
|
|
402 |
|
|
403 |
return 0;
|
|
404 |
}
|
|
405 |
|
|
406 |
|
|
407 |
TBool CISO2022KRImplementation::IsInThisCharacterSetL(
|
|
408 |
TBool& aSetToTrue,
|
|
409 |
TInt& aConfidenceLevel,
|
|
410 |
const TDesC8& aBuf)
|
|
411 |
{
|
|
412 |
aSetToTrue=ETrue;
|
|
413 |
aConfidenceLevel=200;
|
|
414 |
|
|
415 |
TUint8 ch(0);
|
|
416 |
for (TInt i=0;i<aBuf.Length();i++)
|
|
417 |
{
|
|
418 |
ch=aBuf[i];
|
|
419 |
if (ch<0x7F)
|
|
420 |
{
|
|
421 |
continue;
|
|
422 |
}
|
|
423 |
else if (0xa1<=ch&&ch<=0xfe)
|
|
424 |
{
|
|
425 |
i++;
|
|
426 |
__ASSERT_DEBUG(i<aBuf.Length(),User::Panic(_L("IS2022KR"),__LINE__));
|
|
427 |
}
|
|
428 |
else
|
|
429 |
{
|
|
430 |
aConfidenceLevel=0;
|
|
431 |
aSetToTrue=EFalse;
|
|
432 |
break;
|
|
433 |
}
|
|
434 |
}
|
|
435 |
return aSetToTrue;
|
|
436 |
}
|
|
437 |
|
|
438 |
CISO2022KRImplementation* CISO2022KRImplementation::NewL()
|
|
439 |
{
|
|
440 |
CISO2022KRImplementation* self = new(ELeave) CISO2022KRImplementation;
|
|
441 |
return self;
|
|
442 |
}
|
|
443 |
|
|
444 |
CISO2022KRImplementation::CISO2022KRImplementation()
|
|
445 |
{
|
|
446 |
//default constructor.. do nothing
|
|
447 |
}
|
|
448 |
|
|
449 |
CISO2022KRImplementation::~CISO2022KRImplementation()
|
|
450 |
{
|
|
451 |
//default destructor .. do nothing
|
|
452 |
}
|
|
453 |
|
|
454 |
// ECOM CREATION FUNCTION
|
|
455 |
const TImplementationProxy ImplementationTable[] =
|
|
456 |
{
|
|
457 |
// Note: This is the same UID as defined in old mmp-file
|
|
458 |
// Used also in 12221212.rss ( implementation_uid )
|
|
459 |
IMPLEMENTATION_PROXY_ENTRY( 0x20010101, CISO2022KRImplementation::NewL )
|
|
460 |
};
|
|
461 |
|
|
462 |
EXPORT_C const TImplementationProxy* ImplementationGroupProxy( TInt& aTableCount )
|
|
463 |
{
|
|
464 |
aTableCount = sizeof( ImplementationTable ) / sizeof(TImplementationProxy);
|
|
465 |
return ImplementationTable;
|
|
466 |
}
|
|
467 |
|