summaryrefslogtreecommitdiffstats
path: root/tools/linguist/lupdate/fetchtr.cpp
blob: ce8fb985c8e8e30090128c963d64d048ddeea53d (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
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
/**********************************************************************
** Copyright (C) 2005-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of Qt Linguist.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#include <metatranslator.h>

#include <qfile.h>
#include <qregexp.h>
#include <qstring.h>
#include <qtextstream.h>
#include <qvaluestack.h>
#include <qxml.h>

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

/* qmake ignore Q_OBJECT */

static const char MagicComment[] = "TRANSLATOR ";

static QMap<QCString, int> needs_Q_OBJECT;
static QMap<QCString, int> lacks_Q_OBJECT;

/*
  The first part of this source file is the C++ tokenizer.  We skip
  most of C++; the only tokens that interest us are defined here.
  Thus, the code fragment

      int main()
      {
	  printf( "Hello, world!\n" );
	  return 0;
      }

  is broken down into the following tokens (Tok_ omitted):

      Ident Ident LeftParen RightParen
      LeftBrace
	  Ident LeftParen String RightParen Semicolon
	  return Semicolon
      RightBrace.

  The 0 doesn't produce any token.
*/

enum { Tok_Eof, Tok_class, Tok_namespace, Tok_return, Tok_tr,
       Tok_trUtf8, Tok_translate, Tok_Q_OBJECT, Tok_Ident,
       Tok_Comment, Tok_String, Tok_Arrow, Tok_Colon,
       Tok_Gulbrandsen, Tok_LeftBrace, Tok_RightBrace, Tok_LeftParen,
       Tok_RightParen, Tok_Comma, Tok_Semicolon };

/*
  The tokenizer maintains the following global variables. The names
  should be self-explanatory.
*/
static QCString yyFileName;
static int yyCh;
static char yyIdent[128];
static size_t yyIdentLen;
static char yyComment[65536];
static size_t yyCommentLen;
static char yyString[65536];
static size_t yyStringLen;
static QValueStack<int> yySavedBraceDepth;
static QValueStack<int> yySavedParenDepth;
static int yyBraceDepth;
static int yyParenDepth;
static int yyLineNo;
static int yyCurLineNo;
static int yyBraceLineNo;
static int yyParenLineNo;

// the file to read from (if reading from a file)
static FILE *yyInFile;

// the string to read from and current position in the string (otherwise)
static QString yyInStr;
static int yyInPos;

static int (*getChar)();

static int getCharFromFile()
{
    int c = getc( yyInFile );
    if ( c == '\n' )
	yyCurLineNo++;
    return c;
}

static int getCharFromString()
{
    if ( yyInPos == (int) yyInStr.length() ) {
	return EOF;
    } else {
	return yyInStr[yyInPos++].latin1();
    }
}

static void startTokenizer( const char *fileName, int (*getCharFunc)() )
{
    yyInPos = 0;
    getChar = getCharFunc;

    yyFileName = fileName;
    yyCh = getChar();
    yySavedBraceDepth.clear();
    yySavedParenDepth.clear();
    yyBraceDepth = 0;
    yyParenDepth = 0;
    yyCurLineNo = 1;
    yyBraceLineNo = 1;
    yyParenLineNo = 1;
}

static int getToken()
{
    const char tab[] = "abfnrtv";
    const char backTab[] = "\a\b\f\n\r\t\v";
    uint n;

    yyIdentLen = 0;
    yyCommentLen = 0;
    yyStringLen = 0;

    while ( yyCh != EOF ) {
	yyLineNo = yyCurLineNo;

	if ( isalpha(yyCh) || yyCh == '_' ) {
	    do {
		if ( yyIdentLen < sizeof(yyIdent) - 1 )
		    yyIdent[yyIdentLen++] = (char) yyCh;
		yyCh = getChar();
	    } while ( isalnum(yyCh) || yyCh == '_' );
	    yyIdent[yyIdentLen] = '\0';

	    switch ( yyIdent[0] ) {
	    case 'Q':
		if ( strcmp(yyIdent + 1, "_OBJECT") == 0 ) {
		    return Tok_Q_OBJECT;
		} else if ( strcmp(yyIdent + 1, "T_TR_NOOP") == 0 ) {
		    return Tok_tr;
		} else if ( strcmp(yyIdent + 1, "T_TRANSLATE_NOOP") == 0 ) {
		    return Tok_translate;
		}
		break;
	    case 'T':
		// TR() for when all else fails
		if ( qstricmp(yyIdent + 1, "R") == 0 )
		    return Tok_tr;
		break;
	    case 'c':
		if ( strcmp(yyIdent + 1, "lass") == 0 )
		    return Tok_class;
		break;
	    case 'f':
		/*
		  QTranslator::findMessage() has the same parameters as
		  QApplication::translate().
		*/
		if ( strcmp(yyIdent + 1, "indMessage") == 0 )
		    return Tok_translate;
		break;
	    case 'n':
		if ( strcmp(yyIdent + 1, "amespace") == 0 )
		    return Tok_namespace;
		break;
	    case 'r':
		if ( strcmp(yyIdent + 1, "eturn") == 0 )
		    return Tok_return;
		break;
	    case 's':
		if ( strcmp(yyIdent + 1, "truct") == 0 )
		    return Tok_class;
		break;
	    case 't':
		if ( strcmp(yyIdent + 1, "r") == 0 ) {
		    return Tok_tr;
		} else if ( qstrcmp(yyIdent + 1, "rUtf8") == 0 ) {
		    return Tok_trUtf8;
		} else if ( qstrcmp(yyIdent + 1, "ranslate") == 0 ) {
		    return Tok_translate;
		}
	    }
	    return Tok_Ident;
	} else {
	    switch ( yyCh ) {
	    case '#':
		/*
		  Early versions of lupdate complained about
		  unbalanced braces in the following code:

		      #ifdef ALPHA
			  while ( beta ) {
		      #else
			  while ( gamma ) {
		      #endif
			      delta;
			  }

		  The code contains, indeed, two opening braces for
		  one closing brace; yet there's no reason to panic.

		  The solution is to remember yyBraceDepth as it was
		  when #if, #ifdef or #ifndef was met, and to set
		  yyBraceDepth to that value when meeting #elif or
		  #else.
		*/
		do {
		    yyCh = getChar();
		} while ( isspace(yyCh) && yyCh != '\n' );

		switch ( yyCh ) {
		case 'i':
		    yyCh = getChar();
		    if ( yyCh == 'f' ) {
			// if, ifdef, ifndef
			yySavedBraceDepth.push( yyBraceDepth );
                        yySavedParenDepth.push( yyParenDepth );
		    }
		    break;
		case 'e':
		    yyCh = getChar();
		    if ( yyCh == 'l' ) {
			// elif, else
			if ( !yySavedBraceDepth.isEmpty() ) {
			    yyBraceDepth = yySavedBraceDepth.top();
                            yyParenDepth = yySavedParenDepth.top();
			}
		    } else if ( yyCh == 'n' ) {
			// endif
			if ( !yySavedBraceDepth.isEmpty() ) {
			    yySavedBraceDepth.pop();
                            yySavedParenDepth.pop();
			}
		    }
		}
		while ( isalnum(yyCh) || yyCh == '_' )
		    yyCh = getChar();
		break;
	    case '/':
		yyCh = getChar();
		if ( yyCh == '/' ) {
		    do {
			yyCh = getChar();
		    } while ( yyCh != EOF && yyCh != '\n' );
		} else if ( yyCh == '*' ) {
		    bool metAster = FALSE;
		    bool metAsterSlash = FALSE;

		    while ( !metAsterSlash ) {
			yyCh = getChar();
			if ( yyCh == EOF ) {
			    fprintf( stderr,
				     "%s: Unterminated C++ comment starting at"
				     " line %d\n",
				     (const char *) yyFileName, yyLineNo );
			    yyComment[yyCommentLen] = '\0';
			    return Tok_Comment;
			}
			if ( yyCommentLen < sizeof(yyComment) - 1 )
			    yyComment[yyCommentLen++] = (char) yyCh;

			if ( yyCh == '*' )
			    metAster = TRUE;
			else if ( metAster && yyCh == '/' )
			    metAsterSlash = TRUE;
			else
			    metAster = FALSE;
		    }
		    yyCh = getChar();
		    yyCommentLen -= 2;
		    yyComment[yyCommentLen] = '\0';
		    return Tok_Comment;
		}
		break;
	    case '"':
		yyCh = getChar();

		while ( yyCh != EOF && yyCh != '\n' && yyCh != '"' ) {
		    if ( yyCh == '\\' ) {
			yyCh = getChar();

			if ( yyCh == '\n' ) {
			    yyCh = getChar();
			} else if ( yyCh == 'x' ) {
			    QCString hex = "0";

			    yyCh = getChar();
			    while ( isxdigit(yyCh) ) {
				hex += (char) yyCh;
				yyCh = getChar();
			    }
			    sscanf( hex, "%x", &n );
			    if ( yyStringLen < sizeof(yyString) - 1 )
				yyString[yyStringLen++] = (char) n;
			} else if ( yyCh >= '0' && yyCh < '8' ) {
			    QCString oct = "";

			    do {
				oct += (char) yyCh;
				yyCh = getChar();
			    } while ( yyCh >= '0' && yyCh < '8' );
			    sscanf( oct, "%o", &n );
			    if ( yyStringLen < sizeof(yyString) - 1 )
				yyString[yyStringLen++] = (char) n;
			} else {
			    const char *p = strchr( tab, yyCh );
			    if ( yyStringLen < sizeof(yyString) - 1 )
				yyString[yyStringLen++] = ( p == 0 ) ?
					(char) yyCh : backTab[p - tab];
			    yyCh = getChar();
			}
		    } else {
			if ( yyStringLen < sizeof(yyString) - 1 )
			    yyString[yyStringLen++] = (char) yyCh;
			yyCh = getChar();
		    }
		}
		yyString[yyStringLen] = '\0';

		if ( yyCh != '"' )
		    qWarning( "%s:%d: Unterminated C++ string",
			      (const char *) yyFileName, yyLineNo );

		if ( yyCh == EOF ) {
		    return Tok_Eof;
		} else {
		    yyCh = getChar();
		    return Tok_String;
		}
		break;
	    case '-':
		yyCh = getChar();
		if ( yyCh == '>' ) {
		    yyCh = getChar();
		    return Tok_Arrow;
		}
		break;
	    case ':':
		yyCh = getChar();
		if ( yyCh == ':' ) {
		    yyCh = getChar();
		    return Tok_Gulbrandsen;
		}
		return Tok_Colon;
	    case '\'':
		yyCh = getChar();
		if ( yyCh == '\\' )
		    yyCh = getChar();

		do {
		    yyCh = getChar();
		} while ( yyCh != EOF && yyCh != '\'' );
		yyCh = getChar();
		break;
	    case '{':
                if (yyBraceDepth == 0)
		    yyBraceLineNo = yyCurLineNo;
		yyBraceDepth++;
		yyCh = getChar();
		return Tok_LeftBrace;
	    case '}':
                if (yyBraceDepth == 0)
		    yyBraceLineNo = yyCurLineNo;
		yyBraceDepth--;
		yyCh = getChar();
		return Tok_RightBrace;
	    case '(':
                if (yyParenDepth == 0)
		    yyParenLineNo = yyCurLineNo;
		yyParenDepth++;
		yyCh = getChar();
		return Tok_LeftParen;
	    case ')':
		if (yyParenDepth == 0)
		    yyParenLineNo = yyCurLineNo;
		yyParenDepth--;
		yyCh = getChar();
		return Tok_RightParen;
	    case ',':
		yyCh = getChar();
		return Tok_Comma;
	    case ';':
		yyCh = getChar();
		return Tok_Semicolon;
	    default:
		yyCh = getChar();
	    }
	}
    }
    return Tok_Eof;
}

/*
  The second part of this source file is the parser. It accomplishes
  a very easy task: It finds all strings inside a tr() or translate()
  call, and possibly finds out the context of the call. It supports
  three cases: (1) the context is specified, as in
  FunnyDialog::tr("Hello") or translate("FunnyDialog", "Hello");
  (2) the call appears within an inlined function; (3) the call
  appears within a function defined outside the class definition.
*/

static int yyTok;

static bool match( int t )
{
    bool matches = ( yyTok == t );
    if ( matches )
	yyTok = getToken();
    return matches;
}

static bool matchString( QCString *s )
{
    bool matches = ( yyTok == Tok_String );
    *s = "";
    while ( yyTok == Tok_String ) {
	*s += yyString;
	yyTok = getToken();
    }
    return matches;
}

static bool matchEncoding( bool *utf8 )
{
    if ( yyTok == Tok_Ident ) {
	if ( strcmp(yyIdent, "QApplication") == 0 ) {
	    yyTok = getToken();
	    if ( yyTok == Tok_Gulbrandsen )
		yyTok = getToken();
	}
	*utf8 = QString( yyIdent ).endsWith( QString("UTF8") );
	yyTok = getToken();
	return TRUE;
    } else {
	return FALSE;
    }
}

static void parse( MetaTranslator *tor, const char *initialContext,
		   const char *defaultContext )
{
    QMap<QCString, QCString> qualifiedContexts;
    QStringList namespaces;
    QCString context;
    QCString text;
    QCString com;
    QCString functionContext = initialContext;
    QCString prefix;
    bool utf8 = FALSE;
    bool missing_Q_OBJECT = FALSE;

    yyTok = getToken();
    while ( yyTok != Tok_Eof ) {
	switch ( yyTok ) {
	case Tok_class:
	    /*
	      Partial support for inlined functions.
	    */
	    yyTok = getToken();
	    if ( yyBraceDepth == (int) namespaces.count() &&
		 yyParenDepth == 0 ) {
		do {
		    /*
		      This code should execute only once, but we play
		      safe with impure definitions such as
		      'class Q_EXPORT QMessageBox', in which case
		      'QMessageBox' is the class name, not 'Q_EXPORT'.
		    */
		    functionContext = yyIdent;
		    yyTok = getToken();
		} while ( yyTok == Tok_Ident );

		while ( yyTok == Tok_Gulbrandsen ) {
		    yyTok = getToken();
		    functionContext += "::";
		    functionContext += yyIdent;
		    yyTok = getToken();
		}

		if ( yyTok == Tok_Colon ) {
		    missing_Q_OBJECT = TRUE;
		} else {
		    functionContext = defaultContext;
		}
	    }
	    break;
	case Tok_namespace:
	    yyTok = getToken();
	    if ( yyTok == Tok_Ident ) {
		QCString ns = yyIdent;
		yyTok = getToken();
		if ( yyTok == Tok_LeftBrace &&
		     yyBraceDepth == (int) namespaces.count() + 1 )
		    namespaces.append( QString(ns) );
	    }
	    break;
	case Tok_tr:
	case Tok_trUtf8:
	    utf8 = ( yyTok == Tok_trUtf8 );
	    yyTok = getToken();
	    if ( match(Tok_LeftParen) && matchString(&text) ) {
		com = "";
		if ( match(Tok_RightParen) || (match(Tok_Comma) &&
			matchString(&com) && match(Tok_RightParen)) ) {
		    if ( prefix.isNull() ) {
			context = functionContext;
			if ( !namespaces.isEmpty() )
			    context.prepend( (namespaces.join(QString("::")) +
					      QString("::")).latin1() );
		    } else {
			context = prefix;
		    }
		    prefix = (const char *) 0;

		    if ( qualifiedContexts.contains(context) )
			context = qualifiedContexts[context];
		    tor->insert( MetaTranslatorMessage(context, text, com,
						       QString::null, utf8) );

		    if ( lacks_Q_OBJECT.contains(context) ) {
			qWarning( "%s:%d: Class '%s' lacks Q_OBJECT macro",
				  (const char *) yyFileName, yyLineNo,
				  (const char *) context );
			lacks_Q_OBJECT.remove( context );
		    } else {
			needs_Q_OBJECT.insert( context, 0 );
		    }
		}
	    }
	    break;
	case Tok_translate:
	    utf8 = FALSE;
	    yyTok = getToken();
	    if ( match(Tok_LeftParen) &&
		 matchString(&context) &&
		 match(Tok_Comma) &&
		 matchString(&text) ) {
		com = "";
		if ( match(Tok_RightParen) ||
		     (match(Tok_Comma) &&
		      matchString(&com) &&
		      (match(Tok_RightParen) ||
		       match(Tok_Comma) &&
		       matchEncoding(&utf8) &&
		       match(Tok_RightParen))) )
		    tor->insert( MetaTranslatorMessage(context, text, com,
						       QString::null, utf8) );
	    }
	    break;
	case Tok_Q_OBJECT:
	    missing_Q_OBJECT = FALSE;
	    yyTok = getToken();
	    break;
	case Tok_Ident:
	    if ( !prefix.isNull() )
		prefix += "::";
	    prefix += yyIdent;
	    yyTok = getToken();
	    if ( yyTok != Tok_Gulbrandsen )
		prefix = (const char *) 0;
	    break;
	case Tok_Comment:
	    com = yyComment;
	    com = com.simplifyWhiteSpace();
	    if ( com.left(sizeof(MagicComment) - 1) == MagicComment ) {
		com.remove( 0, sizeof(MagicComment) - 1 );
		int k = com.find( ' ' );
		if ( k == -1 ) {
		    context = com;
		} else {
		    context = com.left( k );
		    com.remove( 0, k + 1 );
		    tor->insert( MetaTranslatorMessage(context, "", com,
						       QString::null, FALSE) );
		}

		/*
		  Provide a backdoor for people using "using
		  namespace". See the manual for details.
		*/
		k = 0;
		while ( (k = context.find("::", k)) != -1 ) {
		    qualifiedContexts.insert( context.mid(k + 2), context );
		    k++;
		}
	    }
	    yyTok = getToken();
	    break;
	case Tok_Arrow:
	    yyTok = getToken();
	    if ( yyTok == Tok_tr || yyTok == Tok_trUtf8 )
		qWarning( "%s:%d: Cannot invoke tr() like this",
			  (const char *) yyFileName, yyLineNo );
	    break;
	case Tok_Gulbrandsen:
	    // at top level?
	    if ( yyBraceDepth == (int) namespaces.count() && yyParenDepth == 0 )
		functionContext = prefix;
	    yyTok = getToken();
	    break;
	case Tok_RightBrace:
	case Tok_Semicolon:
	    if ( yyBraceDepth >= 0 &&
		 yyBraceDepth + 1 == (int) namespaces.count() )
		namespaces.remove( namespaces.fromLast() );
	    if ( yyBraceDepth == (int) namespaces.count() ) {
		if ( missing_Q_OBJECT ) {
		    if ( needs_Q_OBJECT.contains(functionContext) ) {
			qWarning( "%s:%d: Class '%s' lacks Q_OBJECT macro",
				  (const char *) yyFileName, yyLineNo,
				  (const char *) functionContext );
		    } else {
			lacks_Q_OBJECT.insert( functionContext, 0 );
		    }
		}
		functionContext = defaultContext;
		missing_Q_OBJECT = FALSE;
	    }
	    yyTok = getToken();
	    break;
	default:
	    yyTok = getToken();
	}
    }

    if ( yyBraceDepth != 0 )
	fprintf( stderr,
		 "%s:%d: Unbalanced braces in C++ code (or abuse of the C++"
		  " preprocessor)\n",
		  (const char *)yyFileName, yyBraceLineNo );
    else if ( yyParenDepth != 0 )
	fprintf( stderr,
		 "%s:%d: Unbalanced parentheses in C++ code (or abuse of the C++"
		 " preprocessor)\n",
		 (const char *)yyFileName, yyParenLineNo );
}

void fetchtr_cpp( const char *fileName, MetaTranslator *tor,
		  const char *defaultContext, bool mustExist )
{
    yyInFile = fopen( fileName, "r" );
    if ( yyInFile == 0 ) {
	if ( mustExist )
	    fprintf( stderr,
		     "lupdate error: Cannot open C++ source file '%s': %s\n",
		     fileName, strerror(errno) );
	return;
    }

    startTokenizer( fileName, getCharFromFile );
    parse( tor, 0, defaultContext );
    fclose( yyInFile );
}

/*
  In addition to C++, we support Qt Designer UI files.
*/

/*
  Fetches tr() calls in C++ code in UI files (inside "<function>"
  tag). This mechanism is obsolete.
*/
void fetchtr_inlined_cpp( const char *fileName, const QString& in,
			  MetaTranslator *tor, const char *context )
{
    yyInStr = in;
    startTokenizer( fileName, getCharFromString );
    parse( tor, context, 0 );
    yyInStr = QString::null;
}

class UiHandler : public QXmlDefaultHandler
{
public:
    UiHandler( MetaTranslator *translator, const char *fileName )
	: tor( translator ), fname( fileName ), comment( "" ) { }

    virtual bool startElement( const QString& namespaceURI,
			       const QString& localName, const QString& qName,
			       const QXmlAttributes& atts );
    virtual bool endElement( const QString& namespaceURI,
			     const QString& localName, const QString& qName );
    virtual bool characters( const QString& ch );
    virtual bool fatalError( const QXmlParseException& exception );

private:
    void flush();

    MetaTranslator *tor;
    QCString fname;
    QString context;
    QString source;
    QString comment;

    QString accum;
};

bool UiHandler::startElement( const QString& /* namespaceURI */,
			      const QString& /* localName */,
			      const QString& qName,
			      const QXmlAttributes& atts )
{
    if ( qName == QString("item") ) {
	flush();
	if ( !atts.value(QString("text")).isEmpty() )
	    source = atts.value( QString("text") );
    } else if ( qName == QString("string") ) {
	flush();
    }
    accum.truncate( 0 );
    return TRUE;
}

bool UiHandler::endElement( const QString& /* namespaceURI */,
			    const QString& /* localName */,
			    const QString& qName )
{
    accum.replace( QRegExp(QString("\r\n")), "\n" );

    if ( qName == QString("class") ) {
	if ( context.isEmpty() )
	    context = accum;
    } else if ( qName == QString("string") ) {
	source = accum;
    } else if ( qName == QString("comment") ) {
	comment = accum;
	flush();
    } else if ( qName == QString("function") ) {
	fetchtr_inlined_cpp( (const char *) fname, accum, tor,
			     context.latin1() );
    } else {
	flush();
    }
    return TRUE;
}

bool UiHandler::characters( const QString& ch )
{
    accum += ch;
    return TRUE;
}

bool UiHandler::fatalError( const QXmlParseException& exception )
{
    QString msg;
    msg.sprintf( "Parse error at line %d, column %d (%s).",
		 exception.lineNumber(), exception.columnNumber(),
		 exception.message().latin1() );
    fprintf( stderr, "XML error: %s\n", msg.latin1() );
    return FALSE;
}

void UiHandler::flush()
{
    if ( !context.isEmpty() && !source.isEmpty() )
	tor->insert( MetaTranslatorMessage(context.utf8(), source.utf8(),
					   comment.utf8(), QString::null,
					   TRUE) );
    source.truncate( 0 );
    comment.truncate( 0 );
}

void fetchtr_ui( const char *fileName, MetaTranslator *tor,
		 const char * /* defaultContext */, bool mustExist )
{
    QFile f( fileName );
    if ( !f.open(IO_ReadOnly) ) {
	if ( mustExist )
	    fprintf( stderr, "lupdate error: cannot open UI file '%s': %s\n",
		     fileName, strerror(errno) );
	return;
    }

    QTextStream t( &f );
    QXmlInputSource in( t );
    QXmlSimpleReader reader;
    reader.setFeature( "http://xml.org/sax/features/namespaces", FALSE );
    reader.setFeature( "http://xml.org/sax/features/namespace-prefixes", TRUE );
    reader.setFeature( "http://trolltech.com/xml/features/report-whitespace"
		       "-only-CharData", FALSE );
    QXmlDefaultHandler *hand = new UiHandler( tor, fileName );
    reader.setContentHandler( hand );
    reader.setErrorHandler( hand );

    if ( !reader.parse(in) )
	fprintf( stderr, "%s: Parse error in UI file\n", fileName );
    reader.setContentHandler( 0 );
    reader.setErrorHandler( 0 );
    delete hand;
    f.close();
}