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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <string.h>
21 : #include <osl/diagnose.h>
22 :
23 : #include <rtl/unload.h>
24 :
25 : #include <uno/mapping.hxx>
26 :
27 : #include <cppuhelper/factory.hxx>
28 : #include <cppuhelper/implbase3.hxx>
29 : #include <cppuhelper/implementationentry.hxx>
30 :
31 : #include <rtl/textenc.h>
32 : #include <rtl/tencinfo.h>
33 :
34 : #include <com/sun/star/io/XTextInputStream.hpp>
35 : #include <com/sun/star/io/XActiveDataSink.hpp>
36 : #include <com/sun/star/lang/XServiceInfo.hpp>
37 :
38 :
39 : #define IMPLEMENTATION_NAME "com.sun.star.comp.io.TextInputStream"
40 : #define SERVICE_NAME "com.sun.star.io.TextInputStream"
41 :
42 : using namespace ::osl;
43 : using namespace ::rtl;
44 : using namespace ::cppu;
45 : using namespace ::com::sun::star::uno;
46 : using namespace ::com::sun::star::lang;
47 : using namespace ::com::sun::star::io;
48 : using namespace ::com::sun::star::registry;
49 :
50 : namespace io_TextInputStream
51 : {
52 : rtl_StandardModuleCount g_moduleCount = MODULE_COUNT_INIT;
53 :
54 : //===========================================================================
55 : // Implementation XTextInputStream
56 :
57 : typedef WeakImplHelper3< XTextInputStream, XActiveDataSink, XServiceInfo > TextInputStreamHelper;
58 :
59 : #define INITIAL_UNICODE_BUFFER_CAPACITY 0x100
60 : #define READ_BYTE_COUNT 0x100
61 :
62 : class OTextInputStream : public TextInputStreamHelper
63 : {
64 : Reference< XInputStream > mxStream;
65 :
66 : // Encoding
67 : OUString mEncoding;
68 : sal_Bool mbEncodingInitialized;
69 : rtl_TextToUnicodeConverter mConvText2Unicode;
70 : rtl_TextToUnicodeContext mContextText2Unicode;
71 : Sequence<sal_Int8> mSeqSource;
72 :
73 : // Internal buffer for characters that are already converted successfully
74 : sal_Unicode* mpBuffer;
75 : sal_Int32 mnBufferSize;
76 : sal_Int32 mnCharsInBuffer;
77 : sal_Bool mbReachedEOF;
78 :
79 : void implResizeBuffer( void );
80 : OUString implReadString( const Sequence< sal_Unicode >& Delimiters,
81 : sal_Bool bRemoveDelimiter, sal_Bool bFindLineEnd )
82 : throw(IOException, RuntimeException);
83 : sal_Int32 implReadNext() throw(IOException, RuntimeException);
84 :
85 : public:
86 : OTextInputStream();
87 : virtual ~OTextInputStream();
88 :
89 : // Methods XTextInputStream
90 : virtual OUString SAL_CALL readLine( )
91 : throw(IOException, RuntimeException);
92 : virtual OUString SAL_CALL readString( const Sequence< sal_Unicode >& Delimiters, sal_Bool bRemoveDelimiter )
93 : throw(IOException, RuntimeException);
94 : virtual sal_Bool SAL_CALL isEOF( )
95 : throw(IOException, RuntimeException);
96 : virtual void SAL_CALL setEncoding( const OUString& Encoding ) throw(RuntimeException);
97 :
98 : // Methods XInputStream
99 : virtual sal_Int32 SAL_CALL readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
100 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException);
101 : virtual sal_Int32 SAL_CALL readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
102 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException);
103 : virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
104 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException);
105 : virtual sal_Int32 SAL_CALL available( )
106 : throw(NotConnectedException, IOException, RuntimeException);
107 : virtual void SAL_CALL closeInput( )
108 : throw(NotConnectedException, IOException, RuntimeException);
109 :
110 : // Methods XActiveDataSink
111 : virtual void SAL_CALL setInputStream( const Reference< XInputStream >& aStream )
112 : throw(RuntimeException);
113 : virtual Reference< XInputStream > SAL_CALL getInputStream()
114 : throw(RuntimeException);
115 :
116 : // Methods XServiceInfo
117 : virtual OUString SAL_CALL getImplementationName() throw();
118 : virtual Sequence< OUString > SAL_CALL getSupportedServiceNames(void) throw();
119 : virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) throw();
120 : };
121 :
122 20 : OTextInputStream::OTextInputStream()
123 : : mSeqSource( READ_BYTE_COUNT ), mpBuffer( NULL ), mnBufferSize( 0 )
124 20 : , mnCharsInBuffer( 0 ), mbReachedEOF( sal_False )
125 : {
126 20 : g_moduleCount.modCnt.acquire( &g_moduleCount.modCnt );
127 20 : mbEncodingInitialized = false;
128 20 : }
129 :
130 60 : OTextInputStream::~OTextInputStream()
131 : {
132 20 : if( mbEncodingInitialized )
133 : {
134 20 : rtl_destroyUnicodeToTextContext( mConvText2Unicode, mContextText2Unicode );
135 20 : rtl_destroyUnicodeToTextConverter( mConvText2Unicode );
136 : }
137 20 : g_moduleCount.modCnt.release( &g_moduleCount.modCnt );
138 40 : }
139 :
140 20 : void OTextInputStream::implResizeBuffer( void )
141 : {
142 20 : sal_Int32 mnNewBufferSize = mnBufferSize * 2;
143 20 : sal_Unicode* pNewBuffer = new sal_Unicode[ mnNewBufferSize ];
144 20 : memcpy( pNewBuffer, mpBuffer, mnCharsInBuffer * sizeof( sal_Unicode ) );
145 20 : mpBuffer = pNewBuffer;
146 20 : mnBufferSize = mnNewBufferSize;
147 20 : }
148 :
149 :
150 : //===========================================================================
151 : // XTextInputStream
152 :
153 493 : OUString OTextInputStream::readLine( )
154 : throw(IOException, RuntimeException)
155 : {
156 493 : static Sequence< sal_Unicode > aDummySeq;
157 493 : return implReadString( aDummySeq, sal_True, sal_True );
158 : }
159 :
160 130 : OUString OTextInputStream::readString( const Sequence< sal_Unicode >& Delimiters, sal_Bool bRemoveDelimiter )
161 : throw(IOException, RuntimeException)
162 : {
163 130 : return implReadString( Delimiters, bRemoveDelimiter, sal_False );
164 : }
165 :
166 707 : sal_Bool OTextInputStream::isEOF()
167 : throw(IOException, RuntimeException)
168 : {
169 707 : sal_Bool bRet = sal_False;
170 707 : if( mnCharsInBuffer == 0 && mbReachedEOF )
171 19 : bRet = sal_True;
172 707 : return bRet;
173 : }
174 :
175 :
176 623 : OUString OTextInputStream::implReadString( const Sequence< sal_Unicode >& Delimiters,
177 : sal_Bool bRemoveDelimiter, sal_Bool bFindLineEnd )
178 : throw(IOException, RuntimeException)
179 : {
180 623 : OUString aRetStr;
181 623 : if( !mbEncodingInitialized )
182 : {
183 0 : OUString aUtf8Str("utf8");
184 0 : setEncoding( aUtf8Str );
185 : }
186 623 : if( !mbEncodingInitialized )
187 0 : return aRetStr;
188 :
189 623 : if( !mpBuffer )
190 : {
191 20 : mnBufferSize = INITIAL_UNICODE_BUFFER_CAPACITY;
192 20 : mpBuffer = new sal_Unicode[ mnBufferSize ];
193 : }
194 :
195 : // Only for bFindLineEnd
196 623 : sal_Unicode cLineEndChar1 = 0x0D;
197 623 : sal_Unicode cLineEndChar2 = 0x0A;
198 :
199 623 : sal_Int32 nBufferReadPos = 0;
200 623 : sal_Int32 nCopyLen = 0;
201 623 : sal_Bool bFound = sal_False;
202 623 : sal_Bool bFoundFirstLineEndChar = sal_False;
203 623 : sal_Unicode cFirstLineEndChar = 0;
204 623 : const sal_Unicode* pDelims = Delimiters.getConstArray();
205 623 : const sal_Int32 nDelimCount = Delimiters.getLength();
206 19356 : while( !bFound )
207 : {
208 : // Still characters available?
209 18110 : if( nBufferReadPos == mnCharsInBuffer )
210 : {
211 : // Already reached EOF? Then we can't read any more
212 85 : if( mbReachedEOF )
213 0 : break;
214 :
215 : // No, so read new characters
216 85 : if( !implReadNext() )
217 0 : break;
218 : }
219 :
220 : // Now there should be characters available
221 : // (otherwise the loop should have been breaked before)
222 18110 : sal_Unicode c = mpBuffer[ nBufferReadPos++ ];
223 :
224 18110 : if( bFindLineEnd )
225 : {
226 15585 : if( bFoundFirstLineEndChar )
227 : {
228 493 : bFound = sal_True;
229 493 : nCopyLen = nBufferReadPos - 2;
230 493 : if( c == cLineEndChar1 || c == cLineEndChar2 )
231 : {
232 : // Same line end char -> new line break
233 986 : if( c == cFirstLineEndChar )
234 : {
235 0 : nBufferReadPos--;
236 : }
237 : }
238 : else
239 : {
240 : // No second line end char
241 0 : nBufferReadPos--;
242 : }
243 : }
244 15092 : else if( c == cLineEndChar1 || c == cLineEndChar2 )
245 : {
246 493 : bFoundFirstLineEndChar = sal_True;
247 493 : cFirstLineEndChar = c;
248 : }
249 : }
250 : else
251 : {
252 5050 : for( sal_Int32 i = 0 ; i < nDelimCount ; i++ )
253 : {
254 2525 : if( c == pDelims[ i ] )
255 : {
256 130 : bFound = sal_True;
257 130 : nCopyLen = nBufferReadPos;
258 130 : if( bRemoveDelimiter )
259 0 : nCopyLen--;
260 : }
261 : }
262 : }
263 : }
264 :
265 : // Nothing found? Return all
266 623 : if( !nCopyLen && !bFound && mbReachedEOF )
267 0 : nCopyLen = nBufferReadPos;
268 :
269 : // Create string
270 623 : if( nCopyLen )
271 587 : aRetStr = OUString( mpBuffer, nCopyLen );
272 :
273 : // Copy rest of buffer
274 : memmove( mpBuffer, mpBuffer + nBufferReadPos,
275 623 : (mnCharsInBuffer - nBufferReadPos) * sizeof( sal_Unicode ) );
276 623 : mnCharsInBuffer -= nBufferReadPos;
277 :
278 623 : return aRetStr;
279 : }
280 :
281 :
282 85 : sal_Int32 OTextInputStream::implReadNext()
283 : throw(IOException, RuntimeException)
284 : {
285 85 : sal_Int32 nFreeBufferSize = mnBufferSize - mnCharsInBuffer;
286 85 : if( nFreeBufferSize < READ_BYTE_COUNT )
287 20 : implResizeBuffer();
288 85 : nFreeBufferSize = mnBufferSize - mnCharsInBuffer;
289 :
290 : try
291 : {
292 85 : sal_Int32 nBytesToRead = READ_BYTE_COUNT;
293 85 : sal_Int32 nRead = mxStream->readSomeBytes( mSeqSource, nBytesToRead );
294 85 : sal_Int32 nTotalRead = nRead;
295 85 : if( nRead < nBytesToRead )
296 18 : mbReachedEOF = sal_True;
297 :
298 : // Try to convert
299 : sal_uInt32 uiInfo;
300 85 : sal_Size nSrcCvtBytes = 0;
301 85 : sal_Size nTargetCount = 0;
302 85 : sal_Size nSourceCount = 0;
303 0 : while( sal_True )
304 : {
305 85 : const sal_Int8 *pbSource = mSeqSource.getConstArray();
306 :
307 : // All invalid characters are transformed to the unicode undefined char
308 : nTargetCount += rtl_convertTextToUnicode(
309 : mConvText2Unicode,
310 : mContextText2Unicode,
311 : (const sal_Char*) &( pbSource[nSourceCount] ),
312 : nTotalRead - nSourceCount,
313 85 : mpBuffer + mnCharsInBuffer + nTargetCount,
314 : nFreeBufferSize - nTargetCount,
315 : RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_DEFAULT |
316 : RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_DEFAULT |
317 : RTL_TEXTTOUNICODE_FLAGS_INVALID_DEFAULT,
318 : &uiInfo,
319 170 : &nSrcCvtBytes );
320 85 : nSourceCount += nSrcCvtBytes;
321 :
322 85 : sal_Bool bCont = sal_False;
323 85 : if( uiInfo & RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL )
324 : {
325 0 : implResizeBuffer();
326 0 : bCont = sal_True;
327 : }
328 :
329 85 : if( uiInfo & RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL )
330 : {
331 : // read next byte
332 0 : static Sequence< sal_Int8 > aOneByteSeq( 1 );
333 0 : nRead = mxStream->readSomeBytes( aOneByteSeq, 1 );
334 0 : if( nRead == 0 )
335 : {
336 0 : mbReachedEOF = sal_True;
337 0 : break;
338 : }
339 :
340 0 : sal_Int32 nOldLen = mSeqSource.getLength();
341 0 : nTotalRead++;
342 0 : if( nTotalRead > nOldLen )
343 : {
344 0 : mSeqSource.realloc( nTotalRead );
345 : }
346 0 : mSeqSource.getArray()[ nOldLen ] = aOneByteSeq.getConstArray()[ 0 ];
347 0 : pbSource = mSeqSource.getConstArray();
348 0 : bCont = sal_True;
349 : }
350 :
351 85 : if( bCont )
352 0 : continue;
353 85 : break;
354 : }
355 :
356 85 : mnCharsInBuffer += nTargetCount;
357 85 : return nTargetCount;
358 : }
359 0 : catch( NotConnectedException& )
360 : {
361 0 : throw IOException();
362 : //throw IOException( L"OTextInputStream::implReadString failed" );
363 : }
364 0 : catch( BufferSizeExceededException& )
365 : {
366 0 : throw IOException();
367 : }
368 : }
369 :
370 20 : void OTextInputStream::setEncoding( const OUString& Encoding )
371 : throw(RuntimeException)
372 : {
373 20 : OString aOEncodingStr = OUStringToOString( Encoding, RTL_TEXTENCODING_ASCII_US );
374 20 : rtl_TextEncoding encoding = rtl_getTextEncodingFromMimeCharset( aOEncodingStr.getStr() );
375 20 : if( RTL_TEXTENCODING_DONTKNOW == encoding )
376 20 : return;
377 :
378 20 : mbEncodingInitialized = true;
379 20 : mConvText2Unicode = rtl_createTextToUnicodeConverter( encoding );
380 20 : mContextText2Unicode = rtl_createTextToUnicodeContext( mConvText2Unicode );
381 20 : mEncoding = Encoding;
382 : }
383 :
384 : //===========================================================================
385 : // XInputStream
386 :
387 0 : sal_Int32 OTextInputStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
388 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
389 : {
390 0 : return mxStream->readBytes( aData, nBytesToRead );
391 : }
392 :
393 0 : sal_Int32 OTextInputStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
394 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
395 : {
396 0 : return mxStream->readSomeBytes( aData, nMaxBytesToRead );
397 : }
398 :
399 0 : void OTextInputStream::skipBytes( sal_Int32 nBytesToSkip )
400 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
401 : {
402 0 : mxStream->skipBytes( nBytesToSkip );
403 0 : }
404 :
405 0 : sal_Int32 OTextInputStream::available( )
406 : throw(NotConnectedException, IOException, RuntimeException)
407 : {
408 0 : return mxStream->available();
409 : }
410 :
411 0 : void OTextInputStream::closeInput( )
412 : throw(NotConnectedException, IOException, RuntimeException)
413 : {
414 0 : mxStream->closeInput();
415 0 : }
416 :
417 :
418 : //===========================================================================
419 : // XActiveDataSink
420 :
421 20 : void OTextInputStream::setInputStream( const Reference< XInputStream >& aStream )
422 : throw(RuntimeException)
423 : {
424 20 : mxStream = aStream;
425 20 : }
426 :
427 0 : Reference< XInputStream > OTextInputStream::getInputStream()
428 : throw(RuntimeException)
429 : {
430 0 : return mxStream;
431 : }
432 :
433 :
434 20 : Reference< XInterface > SAL_CALL TextInputStream_CreateInstance(
435 : SAL_UNUSED_PARAMETER const Reference< XComponentContext > &)
436 : {
437 20 : return Reference < XInterface >( ( OWeakObject * ) new OTextInputStream() );
438 : }
439 :
440 2 : OUString TextInputStream_getImplementationName()
441 : {
442 2 : return OUString ( IMPLEMENTATION_NAME );
443 : }
444 :
445 2 : Sequence< OUString > TextInputStream_getSupportedServiceNames()
446 : {
447 2 : Sequence< OUString > seqNames(1);
448 2 : seqNames.getArray()[0] = SERVICE_NAME;
449 2 : return seqNames;
450 : }
451 :
452 0 : OUString OTextInputStream::getImplementationName() throw()
453 : {
454 0 : return TextInputStream_getImplementationName();
455 : }
456 :
457 0 : sal_Bool OTextInputStream::supportsService(const OUString& ServiceName) throw()
458 : {
459 0 : Sequence< OUString > aSNL = getSupportedServiceNames();
460 0 : const OUString * pArray = aSNL.getConstArray();
461 :
462 0 : for( sal_Int32 i = 0; i < aSNL.getLength(); i++ )
463 0 : if( pArray[i] == ServiceName )
464 0 : return sal_True;
465 :
466 0 : return sal_False;
467 : }
468 :
469 0 : Sequence< OUString > OTextInputStream::getSupportedServiceNames(void) throw()
470 : {
471 0 : return TextInputStream_getSupportedServiceNames();
472 : }
473 :
474 : }
475 :
476 : using namespace io_TextInputStream;
477 :
478 : static struct ImplementationEntry g_entries[] =
479 : {
480 : {
481 : TextInputStream_CreateInstance, TextInputStream_getImplementationName ,
482 : TextInputStream_getSupportedServiceNames, createSingleComponentFactory ,
483 : &g_moduleCount.modCnt , 0
484 : },
485 : { 0, 0, 0, 0, 0, 0 }
486 : };
487 :
488 : extern "C"
489 : {
490 0 : SAL_DLLPUBLIC_EXPORT sal_Bool SAL_CALL component_canUnload( TimeValue *pTime )
491 : {
492 0 : return g_moduleCount.canUnload( &g_moduleCount , pTime );
493 : }
494 :
495 : //==================================================================================================
496 2 : SAL_DLLPUBLIC_EXPORT void * SAL_CALL textinstream_component_getFactory(
497 : const sal_Char * pImplName, void * pServiceManager, void * pRegistryKey )
498 : {
499 2 : return component_getFactoryHelper( pImplName, pServiceManager, pRegistryKey , g_entries );
500 : }
501 : }
502 :
503 :
504 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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