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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 <uno/mapping.hxx>
24 :
25 : #include <cppuhelper/factory.hxx>
26 : #include <cppuhelper/implbase2.hxx>
27 : #include <cppuhelper/implementationentry.hxx>
28 : #include <cppuhelper/supportsservice.hxx>
29 :
30 : #include <rtl/textenc.h>
31 : #include <rtl/tencinfo.h>
32 :
33 : #include <com/sun/star/io/XTextInputStream2.hpp>
34 : #include <com/sun/star/lang/XServiceInfo.hpp>
35 :
36 : #include "services.hxx"
37 :
38 : #define IMPLEMENTATION_NAME "com.sun.star.comp.io.TextInputStream"
39 : #define SERVICE_NAME "com.sun.star.io.TextInputStream"
40 :
41 : using namespace ::osl;
42 : using namespace ::cppu;
43 : using namespace ::com::sun::star::uno;
44 : using namespace ::com::sun::star::lang;
45 : using namespace ::com::sun::star::io;
46 : using namespace ::com::sun::star::registry;
47 :
48 : namespace io_TextInputStream
49 : {
50 :
51 : // Implementation XTextInputStream
52 :
53 : typedef WeakImplHelper2< XTextInputStream2, XServiceInfo > TextInputStreamHelper;
54 :
55 : #define INITIAL_UNICODE_BUFFER_CAPACITY 0x100
56 : #define READ_BYTE_COUNT 0x100
57 :
58 : class OTextInputStream : public TextInputStreamHelper
59 : {
60 : Reference< XInputStream > mxStream;
61 :
62 : // Encoding
63 : OUString mEncoding;
64 : bool mbEncodingInitialized;
65 : rtl_TextToUnicodeConverter mConvText2Unicode;
66 : rtl_TextToUnicodeContext mContextText2Unicode;
67 : Sequence<sal_Int8> mSeqSource;
68 :
69 : // Internal buffer for characters that are already converted successfully
70 : sal_Unicode* mpBuffer;
71 : sal_Int32 mnBufferSize;
72 : sal_Int32 mnCharsInBuffer;
73 : bool mbReachedEOF;
74 :
75 : void implResizeBuffer( void );
76 : OUString implReadString( const Sequence< sal_Unicode >& Delimiters,
77 : bool bRemoveDelimiter, bool bFindLineEnd )
78 : throw(IOException, RuntimeException);
79 : sal_Int32 implReadNext() throw(IOException, RuntimeException);
80 :
81 : public:
82 : OTextInputStream();
83 : virtual ~OTextInputStream();
84 :
85 : // Methods XTextInputStream
86 : virtual OUString SAL_CALL readLine( )
87 : throw(IOException, RuntimeException, std::exception) SAL_OVERRIDE;
88 : virtual OUString SAL_CALL readString( const Sequence< sal_Unicode >& Delimiters, sal_Bool bRemoveDelimiter )
89 : throw(IOException, RuntimeException, std::exception) SAL_OVERRIDE;
90 : virtual sal_Bool SAL_CALL isEOF( )
91 : throw(IOException, RuntimeException, std::exception) SAL_OVERRIDE;
92 : virtual void SAL_CALL setEncoding( const OUString& Encoding ) throw(RuntimeException, std::exception) SAL_OVERRIDE;
93 :
94 : // Methods XInputStream
95 : virtual sal_Int32 SAL_CALL readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
96 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception) SAL_OVERRIDE;
97 : virtual sal_Int32 SAL_CALL readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
98 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception) SAL_OVERRIDE;
99 : virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
100 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception) SAL_OVERRIDE;
101 : virtual sal_Int32 SAL_CALL available( )
102 : throw(NotConnectedException, IOException, RuntimeException, std::exception) SAL_OVERRIDE;
103 : virtual void SAL_CALL closeInput( )
104 : throw(NotConnectedException, IOException, RuntimeException, std::exception) SAL_OVERRIDE;
105 :
106 : // Methods XActiveDataSink
107 : virtual void SAL_CALL setInputStream( const Reference< XInputStream >& aStream )
108 : throw(RuntimeException, std::exception) SAL_OVERRIDE;
109 : virtual Reference< XInputStream > SAL_CALL getInputStream()
110 : throw(RuntimeException, std::exception) SAL_OVERRIDE;
111 :
112 : // Methods XServiceInfo
113 : virtual OUString SAL_CALL getImplementationName() throw(std::exception) SAL_OVERRIDE;
114 : virtual Sequence< OUString > SAL_CALL getSupportedServiceNames(void) throw(std::exception) SAL_OVERRIDE;
115 : virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) throw(std::exception) SAL_OVERRIDE;
116 : };
117 :
118 378 : OTextInputStream::OTextInputStream()
119 : : mbEncodingInitialized(false)
120 : , mConvText2Unicode(NULL)
121 : , mContextText2Unicode(NULL)
122 : , mSeqSource(READ_BYTE_COUNT)
123 : , mpBuffer(NULL)
124 : , mnBufferSize(0)
125 : , mnCharsInBuffer(0)
126 378 : , mbReachedEOF(false)
127 : {
128 378 : }
129 :
130 1134 : OTextInputStream::~OTextInputStream()
131 : {
132 378 : if( mbEncodingInitialized )
133 : {
134 376 : rtl_destroyUnicodeToTextContext( mConvText2Unicode, mContextText2Unicode );
135 376 : rtl_destroyUnicodeToTextConverter( mConvText2Unicode );
136 : }
137 :
138 378 : delete[] mpBuffer;
139 756 : }
140 :
141 370 : void OTextInputStream::implResizeBuffer( void )
142 : {
143 370 : sal_Int32 mnNewBufferSize = mnBufferSize * 2;
144 370 : sal_Unicode* pNewBuffer = new sal_Unicode[ mnNewBufferSize ];
145 370 : memcpy( pNewBuffer, mpBuffer, mnCharsInBuffer * sizeof( sal_Unicode ) );
146 370 : delete[] mpBuffer;
147 370 : mpBuffer = pNewBuffer;
148 370 : mnBufferSize = mnNewBufferSize;
149 370 : }
150 :
151 :
152 :
153 : // XTextInputStream
154 :
155 14324 : OUString OTextInputStream::readLine( )
156 : throw(IOException, RuntimeException, std::exception)
157 : {
158 14324 : static Sequence< sal_Unicode > aDummySeq;
159 14324 : return implReadString( aDummySeq, true, true );
160 : }
161 :
162 428 : OUString OTextInputStream::readString( const Sequence< sal_Unicode >& Delimiters, sal_Bool bRemoveDelimiter )
163 : throw(IOException, RuntimeException, std::exception)
164 : {
165 428 : return implReadString( Delimiters, bRemoveDelimiter, false );
166 : }
167 :
168 15286 : sal_Bool OTextInputStream::isEOF()
169 : throw(IOException, RuntimeException, std::exception)
170 : {
171 15286 : bool bRet = false;
172 15286 : if( mnCharsInBuffer == 0 && mbReachedEOF )
173 320 : bRet = true;
174 15286 : return bRet;
175 : }
176 :
177 :
178 14752 : OUString OTextInputStream::implReadString( const Sequence< sal_Unicode >& Delimiters,
179 : bool bRemoveDelimiter, bool bFindLineEnd )
180 : throw(IOException, RuntimeException)
181 : {
182 14752 : OUString aRetStr;
183 14752 : if( !mbEncodingInitialized )
184 : {
185 0 : OUString aUtf8Str("utf8");
186 0 : setEncoding( aUtf8Str );
187 : }
188 14752 : if( !mbEncodingInitialized )
189 0 : return aRetStr;
190 :
191 14752 : if( !mpBuffer )
192 : {
193 376 : mnBufferSize = INITIAL_UNICODE_BUFFER_CAPACITY;
194 376 : mpBuffer = new sal_Unicode[ mnBufferSize ];
195 : }
196 :
197 : // Only for bFindLineEnd
198 14752 : sal_Unicode cLineEndChar1 = 0x0D;
199 14752 : sal_Unicode cLineEndChar2 = 0x0A;
200 :
201 14752 : sal_Int32 nBufferReadPos = 0;
202 14752 : sal_Int32 nCopyLen = 0;
203 14752 : bool bFound = false;
204 14752 : bool bFoundFirstLineEndChar = false;
205 14752 : sal_Unicode cFirstLineEndChar = 0;
206 14752 : const sal_Unicode* pDelims = Delimiters.getConstArray();
207 14752 : const sal_Int32 nDelimCount = Delimiters.getLength();
208 563078 : while( !bFound )
209 : {
210 : // Still characters available?
211 533574 : if( nBufferReadPos == mnCharsInBuffer )
212 : {
213 : // Already reached EOF? Then we can't read any more
214 2336 : if( mbReachedEOF )
215 0 : break;
216 :
217 : // No, so read new characters
218 2336 : if( !implReadNext() )
219 0 : break;
220 : }
221 :
222 : // Now there should be characters available
223 : // (otherwise the loop should have been breaked before)
224 533574 : sal_Unicode c = mpBuffer[ nBufferReadPos++ ];
225 :
226 533574 : if( bFindLineEnd )
227 : {
228 524310 : if( bFoundFirstLineEndChar )
229 : {
230 14324 : bFound = true;
231 14324 : nCopyLen = nBufferReadPos - 2;
232 14324 : if( c == cLineEndChar1 || c == cLineEndChar2 )
233 : {
234 : // Same line end char -> new line break
235 28648 : if( c == cFirstLineEndChar )
236 : {
237 0 : nBufferReadPos--;
238 : }
239 : }
240 : else
241 : {
242 : // No second line end char
243 0 : nBufferReadPos--;
244 : }
245 : }
246 509986 : else if( c == cLineEndChar1 || c == cLineEndChar2 )
247 : {
248 14324 : bFoundFirstLineEndChar = true;
249 14324 : cFirstLineEndChar = c;
250 : }
251 : }
252 : else
253 : {
254 18528 : for( sal_Int32 i = 0 ; i < nDelimCount ; i++ )
255 : {
256 9264 : if( c == pDelims[ i ] )
257 : {
258 428 : bFound = true;
259 428 : nCopyLen = nBufferReadPos;
260 428 : if( bRemoveDelimiter )
261 0 : nCopyLen--;
262 : }
263 : }
264 : }
265 : }
266 :
267 : // Nothing found? Return all
268 14752 : if( !nCopyLen && !bFound && mbReachedEOF )
269 0 : nCopyLen = nBufferReadPos;
270 :
271 : // Create string
272 14752 : if( nCopyLen )
273 13462 : aRetStr = OUString( mpBuffer, nCopyLen );
274 :
275 : // Copy rest of buffer
276 : memmove( mpBuffer, mpBuffer + nBufferReadPos,
277 14752 : (mnCharsInBuffer - nBufferReadPos) * sizeof( sal_Unicode ) );
278 14752 : mnCharsInBuffer -= nBufferReadPos;
279 :
280 14752 : return aRetStr;
281 : }
282 :
283 :
284 2336 : sal_Int32 OTextInputStream::implReadNext()
285 : throw(IOException, RuntimeException)
286 : {
287 2336 : sal_Int32 nFreeBufferSize = mnBufferSize - mnCharsInBuffer;
288 2336 : if( nFreeBufferSize < READ_BYTE_COUNT )
289 370 : implResizeBuffer();
290 2336 : nFreeBufferSize = mnBufferSize - mnCharsInBuffer;
291 :
292 : try
293 : {
294 2336 : sal_Int32 nBytesToRead = READ_BYTE_COUNT;
295 2336 : sal_Int32 nRead = mxStream->readSomeBytes( mSeqSource, nBytesToRead );
296 2336 : sal_Int32 nTotalRead = nRead;
297 2336 : if( nRead < nBytesToRead )
298 320 : mbReachedEOF = true;
299 :
300 : // Try to convert
301 : sal_uInt32 uiInfo;
302 2336 : sal_Size nSrcCvtBytes = 0;
303 2336 : sal_Size nTargetCount = 0;
304 2336 : sal_Size nSourceCount = 0;
305 : while( true )
306 : {
307 2336 : const sal_Int8 *pbSource = mSeqSource.getConstArray();
308 :
309 : // All invalid characters are transformed to the unicode undefined char
310 : nTargetCount += rtl_convertTextToUnicode(
311 : mConvText2Unicode,
312 : mContextText2Unicode,
313 : (const sal_Char*) &( pbSource[nSourceCount] ),
314 : nTotalRead - nSourceCount,
315 2336 : mpBuffer + mnCharsInBuffer + nTargetCount,
316 : nFreeBufferSize - nTargetCount,
317 : RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_DEFAULT |
318 : RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_DEFAULT |
319 : RTL_TEXTTOUNICODE_FLAGS_INVALID_DEFAULT,
320 : &uiInfo,
321 4672 : &nSrcCvtBytes );
322 2336 : nSourceCount += nSrcCvtBytes;
323 :
324 2336 : bool bCont = false;
325 2336 : if( uiInfo & RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL )
326 : {
327 0 : implResizeBuffer();
328 0 : bCont = true;
329 : }
330 :
331 2336 : if( uiInfo & RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL )
332 : {
333 : // read next byte
334 0 : static Sequence< sal_Int8 > aOneByteSeq( 1 );
335 0 : nRead = mxStream->readSomeBytes( aOneByteSeq, 1 );
336 0 : if( nRead == 0 )
337 : {
338 0 : mbReachedEOF = true;
339 0 : break;
340 : }
341 :
342 0 : sal_Int32 nOldLen = mSeqSource.getLength();
343 0 : nTotalRead++;
344 0 : if( nTotalRead > nOldLen )
345 : {
346 0 : mSeqSource.realloc( nTotalRead );
347 : }
348 0 : mSeqSource.getArray()[ nOldLen ] = aOneByteSeq.getConstArray()[ 0 ];
349 0 : pbSource = mSeqSource.getConstArray();
350 0 : bCont = true;
351 : }
352 :
353 2336 : if( bCont )
354 0 : continue;
355 2336 : break;
356 : }
357 :
358 2336 : mnCharsInBuffer += nTargetCount;
359 2336 : return nTargetCount;
360 : }
361 0 : catch( NotConnectedException& )
362 : {
363 0 : throw IOException();
364 : //throw IOException( L"OTextInputStream::implReadString failed" );
365 : }
366 0 : catch( BufferSizeExceededException& )
367 : {
368 0 : throw IOException();
369 : }
370 : }
371 :
372 376 : void OTextInputStream::setEncoding( const OUString& Encoding )
373 : throw(RuntimeException, std::exception)
374 : {
375 376 : OString aOEncodingStr = OUStringToOString( Encoding, RTL_TEXTENCODING_ASCII_US );
376 376 : rtl_TextEncoding encoding = rtl_getTextEncodingFromMimeCharset( aOEncodingStr.getStr() );
377 376 : if( RTL_TEXTENCODING_DONTKNOW == encoding )
378 376 : return;
379 :
380 376 : mbEncodingInitialized = true;
381 376 : mConvText2Unicode = rtl_createTextToUnicodeConverter( encoding );
382 376 : mContextText2Unicode = rtl_createTextToUnicodeContext( mConvText2Unicode );
383 376 : mEncoding = Encoding;
384 : }
385 :
386 :
387 : // XInputStream
388 :
389 0 : sal_Int32 OTextInputStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
390 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
391 : {
392 0 : return mxStream->readBytes( aData, nBytesToRead );
393 : }
394 :
395 0 : sal_Int32 OTextInputStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
396 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
397 : {
398 0 : return mxStream->readSomeBytes( aData, nMaxBytesToRead );
399 : }
400 :
401 0 : void OTextInputStream::skipBytes( sal_Int32 nBytesToSkip )
402 : throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
403 : {
404 0 : mxStream->skipBytes( nBytesToSkip );
405 0 : }
406 :
407 0 : sal_Int32 OTextInputStream::available( )
408 : throw(NotConnectedException, IOException, RuntimeException, std::exception)
409 : {
410 0 : return mxStream->available();
411 : }
412 :
413 0 : void OTextInputStream::closeInput( )
414 : throw(NotConnectedException, IOException, RuntimeException, std::exception)
415 : {
416 0 : mxStream->closeInput();
417 0 : }
418 :
419 :
420 :
421 : // XActiveDataSink
422 :
423 376 : void OTextInputStream::setInputStream( const Reference< XInputStream >& aStream )
424 : throw(RuntimeException, std::exception)
425 : {
426 376 : mxStream = aStream;
427 376 : }
428 :
429 0 : Reference< XInputStream > OTextInputStream::getInputStream()
430 : throw(RuntimeException, std::exception)
431 : {
432 0 : return mxStream;
433 : }
434 :
435 :
436 378 : Reference< XInterface > SAL_CALL TextInputStream_CreateInstance(
437 : SAL_UNUSED_PARAMETER const Reference< XComponentContext > &)
438 : {
439 378 : return Reference < XInterface >( ( OWeakObject * ) new OTextInputStream() );
440 : }
441 :
442 208 : OUString TextInputStream_getImplementationName()
443 : {
444 208 : return OUString ( IMPLEMENTATION_NAME );
445 : }
446 :
447 12 : Sequence< OUString > TextInputStream_getSupportedServiceNames()
448 : {
449 12 : Sequence< OUString > seqNames(1);
450 12 : seqNames.getArray()[0] = SERVICE_NAME;
451 12 : return seqNames;
452 : }
453 :
454 0 : OUString OTextInputStream::getImplementationName() throw(std::exception)
455 : {
456 0 : return TextInputStream_getImplementationName();
457 : }
458 :
459 0 : sal_Bool OTextInputStream::supportsService(const OUString& ServiceName) throw(std::exception)
460 : {
461 0 : return cppu::supportsService(this, ServiceName);
462 : }
463 :
464 0 : Sequence< OUString > OTextInputStream::getSupportedServiceNames(void) throw(std::exception)
465 : {
466 0 : return TextInputStream_getSupportedServiceNames();
467 : }
468 :
469 : }
470 :
471 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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