summaryrefslogtreecommitdiff
path: root/io/source/TextInputStream/TextInputStream.cxx
blob: 1852ed85593925b1094ffbadba40ad94ca7b496a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <string.h>
#include <osl/diagnose.h>

#include <uno/mapping.hxx>

#include <cppuhelper/factory.hxx>
#include <cppuhelper/implbase.hxx>
#include <cppuhelper/implementationentry.hxx>
#include <cppuhelper/supportsservice.hxx>

#include <rtl/textenc.h>
#include <rtl/tencinfo.h>

#include <com/sun/star/io/XTextInputStream2.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>

#include "services.hxx"

#define IMPLEMENTATION_NAME "com.sun.star.comp.io.TextInputStream"
#define SERVICE_NAME "com.sun.star.io.TextInputStream"

using namespace ::osl;
using namespace ::cppu;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::io;
using namespace ::com::sun::star::registry;

namespace io_TextInputStream
{

// Implementation XTextInputStream

#define INITIAL_UNICODE_BUFFER_CAPACITY     0x100
#define READ_BYTE_COUNT                     0x100

class OTextInputStream : public WeakImplHelper< XTextInputStream2, XServiceInfo >
{
    Reference< XInputStream > mxStream;

    // Encoding
    OUString mEncoding;
    bool mbEncodingInitialized;
    rtl_TextToUnicodeConverter  mConvText2Unicode;
    rtl_TextToUnicodeContext    mContextText2Unicode;
    Sequence<sal_Int8>          mSeqSource;

    // Internal buffer for characters that are already converted successfully
    sal_Unicode* mpBuffer;
    sal_Int32 mnBufferSize;
    sal_Int32 mnCharsInBuffer;
    bool mbReachedEOF;

    void implResizeBuffer();
    OUString implReadString( const Sequence< sal_Unicode >& Delimiters,
        bool bRemoveDelimiter, bool bFindLineEnd )
            throw(IOException, RuntimeException);
    sal_Int32 implReadNext() throw(IOException, RuntimeException);

public:
    OTextInputStream();
    virtual ~OTextInputStream();

    // Methods XTextInputStream
    virtual OUString SAL_CALL readLine(  )
        throw(IOException, RuntimeException, std::exception) override;
    virtual OUString SAL_CALL readString( const Sequence< sal_Unicode >& Delimiters, sal_Bool bRemoveDelimiter )
        throw(IOException, RuntimeException, std::exception) override;
    virtual sal_Bool SAL_CALL isEOF(  )
        throw(IOException, RuntimeException, std::exception) override;
    virtual void SAL_CALL setEncoding( const OUString& Encoding ) throw(RuntimeException, std::exception) override;

    // Methods XInputStream
    virtual sal_Int32 SAL_CALL readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
        throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception) override;
    virtual sal_Int32 SAL_CALL readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
        throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception) override;
    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
        throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception) override;
    virtual sal_Int32 SAL_CALL available(  )
        throw(NotConnectedException, IOException, RuntimeException, std::exception) override;
    virtual void SAL_CALL closeInput(  )
        throw(NotConnectedException, IOException, RuntimeException, std::exception) override;

    // Methods XActiveDataSink
    virtual void SAL_CALL setInputStream( const Reference< XInputStream >& aStream )
        throw(RuntimeException, std::exception) override;
    virtual Reference< XInputStream > SAL_CALL getInputStream()
        throw(RuntimeException, std::exception) override;

    // Methods XServiceInfo
        virtual OUString              SAL_CALL getImplementationName() throw(std::exception) override;
        virtual Sequence< OUString >  SAL_CALL getSupportedServiceNames() throw(std::exception) override;
        virtual sal_Bool              SAL_CALL supportsService(const OUString& ServiceName) throw(std::exception) override;
};

OTextInputStream::OTextInputStream()
    : mbEncodingInitialized(false)
    , mConvText2Unicode(nullptr)
    , mContextText2Unicode(nullptr)
    , mSeqSource(READ_BYTE_COUNT)
    , mpBuffer(nullptr)
    , mnBufferSize(0)
    , mnCharsInBuffer(0)
    , mbReachedEOF(false)
{
}

OTextInputStream::~OTextInputStream()
{
    if( mbEncodingInitialized )
    {
        rtl_destroyTextToUnicodeContext( mConvText2Unicode, mContextText2Unicode );
        rtl_destroyTextToUnicodeConverter( mConvText2Unicode );
    }

    delete[] mpBuffer;
}

void OTextInputStream::implResizeBuffer()
{
    sal_Int32 nNewBufferSize = mnBufferSize * 2;
    sal_Unicode* pNewBuffer = new sal_Unicode[ nNewBufferSize ];
    memcpy( pNewBuffer, mpBuffer, mnCharsInBuffer * sizeof( sal_Unicode ) );
    delete[] mpBuffer;
    mpBuffer = pNewBuffer;
    mnBufferSize = nNewBufferSize;
}


// XTextInputStream

OUString OTextInputStream::readLine(  )
    throw(IOException, RuntimeException, std::exception)
{
    static Sequence< sal_Unicode > aDummySeq;
    return implReadString( aDummySeq, true, true );
}

OUString OTextInputStream::readString( const Sequence< sal_Unicode >& Delimiters, sal_Bool bRemoveDelimiter )
        throw(IOException, RuntimeException, std::exception)
{
    return implReadString( Delimiters, bRemoveDelimiter, false );
}

sal_Bool OTextInputStream::isEOF()
    throw(IOException, RuntimeException, std::exception)
{
    bool bRet = false;
    if( mnCharsInBuffer == 0 && mbReachedEOF )
        bRet = true;
    return bRet;
}


OUString OTextInputStream::implReadString( const Sequence< sal_Unicode >& Delimiters,
                                           bool bRemoveDelimiter, bool bFindLineEnd )
        throw(IOException, RuntimeException)
{
    OUString aRetStr;
    if( !mbEncodingInitialized )
    {
        OUString aUtf8Str("utf8");
        setEncoding( aUtf8Str );
    }
    if( !mbEncodingInitialized )
        return aRetStr;

    if( !mpBuffer )
    {
        mnBufferSize = INITIAL_UNICODE_BUFFER_CAPACITY;
        mpBuffer = new sal_Unicode[ mnBufferSize ];
    }

    // Only for bFindLineEnd
    sal_Unicode cLineEndChar1 = 0x0D;
    sal_Unicode cLineEndChar2 = 0x0A;

    sal_Int32 nBufferReadPos = 0;
    sal_Int32 nCopyLen = 0;
    bool bFound = false;
    bool bFoundFirstLineEndChar = false;
    sal_Unicode cFirstLineEndChar = 0;
    const sal_Unicode* pDelims = Delimiters.getConstArray();
    const sal_Int32 nDelimCount = Delimiters.getLength();
    while( !bFound )
    {
        // Still characters available?
        if( nBufferReadPos == mnCharsInBuffer )
        {
            // Already reached EOF? Then we can't read any more
            if( mbReachedEOF )
                break;

            // No, so read new characters
            if( !implReadNext() )
                break;
        }

        // Now there should be characters available
        // (otherwise the loop should have been breaked before)
        sal_Unicode c = mpBuffer[ nBufferReadPos++ ];

        if( bFindLineEnd )
        {
            if( bFoundFirstLineEndChar )
            {
                bFound = true;
                nCopyLen = nBufferReadPos - 2;
                if( c == cLineEndChar1 || c == cLineEndChar2 )
                {
                    // Same line end char -> new line break
                    if( c == cFirstLineEndChar )
                    {
                        nBufferReadPos--;
                    }
                }
                else
                {
                    // No second line end char
                    nBufferReadPos--;
                }
            }
            else if( c == cLineEndChar1 || c == cLineEndChar2 )
            {
                bFoundFirstLineEndChar = true;
                cFirstLineEndChar = c;
            }
        }
        else
        {
            for( sal_Int32 i = 0 ; i < nDelimCount ; i++ )
            {
                if( c == pDelims[ i ] )
                {
                    bFound = true;
                    nCopyLen = nBufferReadPos;
                    if( bRemoveDelimiter )
                        nCopyLen--;
                }
            }
        }
    }

    // Nothing found? Return all
    if( !nCopyLen && !bFound && mbReachedEOF )
        nCopyLen = nBufferReadPos;

    // Create string
    if( nCopyLen )
        aRetStr = OUString( mpBuffer, nCopyLen );

    // Copy rest of buffer
    memmove( mpBuffer, mpBuffer + nBufferReadPos,
        (mnCharsInBuffer - nBufferReadPos) * sizeof( sal_Unicode ) );
    mnCharsInBuffer -= nBufferReadPos;

    return aRetStr;
}


sal_Int32 OTextInputStream::implReadNext()
        throw(IOException, RuntimeException)
{
    sal_Int32 nFreeBufferSize = mnBufferSize - mnCharsInBuffer;
    if( nFreeBufferSize < READ_BYTE_COUNT )
        implResizeBuffer();
    nFreeBufferSize = mnBufferSize - mnCharsInBuffer;

    try
    {
        sal_Int32 nBytesToRead = READ_BYTE_COUNT;
        sal_Int32 nRead = mxStream->readSomeBytes( mSeqSource, nBytesToRead );
        sal_Int32 nTotalRead = nRead;
        if( nRead == 0 )
            mbReachedEOF = true;

        // Try to convert
        sal_uInt32 uiInfo;
        sal_Size nSrcCvtBytes = 0;
        sal_Size nTargetCount = 0;
        sal_Size nSourceCount = 0;
        while( true )
        {
            const sal_Int8 *pbSource = mSeqSource.getConstArray();

            // All invalid characters are transformed to the unicode undefined char
            nTargetCount += rtl_convertTextToUnicode(
                                mConvText2Unicode,
                                mContextText2Unicode,
                                reinterpret_cast<const char*>(&( pbSource[nSourceCount] )),
                                nTotalRead - nSourceCount,
                                mpBuffer + mnCharsInBuffer + nTargetCount,
                                nFreeBufferSize - nTargetCount,
                                RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_DEFAULT   |
                                RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_DEFAULT |
                                RTL_TEXTTOUNICODE_FLAGS_INVALID_DEFAULT,
                                &uiInfo,
                                &nSrcCvtBytes );
            nSourceCount += nSrcCvtBytes;

            bool bCont = false;
            if( uiInfo & RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL )
            {
                implResizeBuffer();
                bCont = true;
            }

            if( uiInfo & RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL )
            {
                // read next byte
                static Sequence< sal_Int8 > aOneByteSeq( 1 );
                nRead = mxStream->readSomeBytes( aOneByteSeq, 1 );
                if( nRead == 0 )
                {
                    mbReachedEOF = true;
                    break;
                }

                sal_Int32 nOldLen = mSeqSource.getLength();
                nTotalRead++;
                if( nTotalRead > nOldLen )
                {
                    mSeqSource.realloc( nTotalRead );
                }
                mSeqSource.getArray()[ nOldLen ] = aOneByteSeq.getConstArray()[ 0 ];
                bCont = true;
            }

            if( bCont )
                continue;
            break;
        }

        mnCharsInBuffer += nTargetCount;
        return nTargetCount;
    }
    catch( NotConnectedException& )
    {
        throw IOException();
        //throw IOException( L"OTextInputStream::implReadString failed" );
    }
    catch( BufferSizeExceededException& )
    {
        throw IOException();
    }
}

void OTextInputStream::setEncoding( const OUString& Encoding )
    throw(RuntimeException, std::exception)
{
    OString aOEncodingStr = OUStringToOString( Encoding, RTL_TEXTENCODING_ASCII_US );
    rtl_TextEncoding encoding = rtl_getTextEncodingFromMimeCharset( aOEncodingStr.getStr() );
    if( RTL_TEXTENCODING_DONTKNOW == encoding )
        return;

    mbEncodingInitialized = true;
    mConvText2Unicode = rtl_createTextToUnicodeConverter( encoding );
    mContextText2Unicode = rtl_createTextToUnicodeContext( mConvText2Unicode );
    mEncoding = Encoding;
}


// XInputStream

sal_Int32 OTextInputStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
    throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
{
    return mxStream->readBytes( aData, nBytesToRead );
}

sal_Int32 OTextInputStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
    throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
{
    return mxStream->readSomeBytes( aData, nMaxBytesToRead );
}

void OTextInputStream::skipBytes( sal_Int32 nBytesToSkip )
    throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
{
    mxStream->skipBytes( nBytesToSkip );
}

sal_Int32 OTextInputStream::available(  )
    throw(NotConnectedException, IOException, RuntimeException, std::exception)
{
    return mxStream->available();
}

void OTextInputStream::closeInput(  )
    throw(NotConnectedException, IOException, RuntimeException, std::exception)
{
    mxStream->closeInput();
}


// XActiveDataSink

void OTextInputStream::setInputStream( const Reference< XInputStream >& aStream )
    throw(RuntimeException, std::exception)
{
    mxStream = aStream;
}

Reference< XInputStream > OTextInputStream::getInputStream()
    throw(RuntimeException, std::exception)
{
    return mxStream;
}


Reference< XInterface > SAL_CALL TextInputStream_CreateInstance(
    SAL_UNUSED_PARAMETER const Reference< XComponentContext > &)
{
    return Reference < XInterface >( static_cast<OWeakObject *>(new OTextInputStream()) );
}

OUString TextInputStream_getImplementationName()
{
    return OUString ( IMPLEMENTATION_NAME );
}

Sequence< OUString > TextInputStream_getSupportedServiceNames()
{
    Sequence< OUString > seqNames { SERVICE_NAME };
    return seqNames;
}

OUString OTextInputStream::getImplementationName() throw(std::exception)
{
    return TextInputStream_getImplementationName();
}

sal_Bool OTextInputStream::supportsService(const OUString& ServiceName) throw(std::exception)
{
    return cppu::supportsService(this, ServiceName);
}

Sequence< OUString > OTextInputStream::getSupportedServiceNames() throw(std::exception)
{
    return TextInputStream_getSupportedServiceNames();
}

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */