aboutsummaryrefslogtreecommitdiff
path: root/src/xmlreader.cpp
blob: 2a5f63fd9281e8fb2e3be3863b223efb7e55fcd5 (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
#include "xmlreader.h"
#include "xmlexception.h"
#include <string.h>
#include "hashfunctionstring.h"

XmlReader::XmlReader( bool bStrip ) :
	bStrip( bStrip ),
	htEntity( new HashFunctionString(), 11 )
{
}

XmlReader::~XmlReader()
{
	void *i = htEntity.getFirstItemPos();
	while( (i = htEntity.getNextItemPos( i ) ) )
	{
		free( (char *)(htEntity.getItemID( i )) );
		delete (StaticString *)htEntity.getItemData( i );
	}
}

void XmlReader::addEntity( const char *name, const char *value )
{
	if( htEntity[name] ) return;

	char *sName = strdup( name );
	StaticString *sValue = new StaticString( value );

	htEntity.insert( sName, sValue );
}

#define gcall( x ) if( x == false ) return false;

bool XmlReader::isws( char chr )
{
	return ( chr == ' ' || chr == '\t' || chr == '\n' || chr == '\r' );
}

bool XmlReader::ws()
{
	while( true )
	{
		char chr = getChar();
		if( isws( chr ) )
		{
			usedChar();
		}
		else
		{
			return true;
		}
	}
	return true;
}

bool XmlReader::buildDoc()
{
	// take care of initial whitespace
	gcall( ws() );
	textDecl();
	entity();
	addEntity("gt", ">");
	addEntity("lt", "<");
	addEntity("amp", "&");
	addEntity("apos", "\'");
	addEntity("quot", "\"");
	gcall( node() );

	return true;
}

void XmlReader::textDecl()
{
	char chr;
	if( getChar() == '<' && getChar( 1 ) == '?' )
	{
		usedChar( 2 );
		for(;;)
		{
			if( getChar() == '?' )
			{
				if( getChar( 1 ) == '>' )
				{
					usedChar( 2 );
					return;
				}
			}
			usedChar();
		}
	}
}

void XmlReader::entity()
{
	for(;;)
	{
		ws();

		if( getChar() == '<' && getChar( 1 ) == '!' )
		{
			usedChar( 2 );
			ws();
			std::string buf;
			for(;;)
			{
				char chr = getChar();
				usedChar();
				if( isws( chr ) ) break;
				buf += chr;
			}

			if( strcmp( buf.c_str(), "ENTITY") == 0 )
			{
				ws();
				std::string name;
				for(;;)
				{
					char chr = getChar();
					usedChar();
					if( isws( chr ) ) break;
					name += chr;
				}
				ws();
				char quot = getChar();
				usedChar();
				if( quot != '\'' && quot != '\"' )
				{
					throw XmlException(
						"Only quoted entity values are supported."
						);
				}
				std::string value;
				for(;;)
				{
					char chr = getChar();
					usedChar();
					if( chr == '&' )
					{
						StaticString *tmp = getEscape();
						if( tmp == NULL ) throw XmlException("Entity thing");
						value += tmp->getString();
						delete tmp;
					}
					else if( chr == quot )
					{
						break;
					}
					else
					{
						value += chr;
					}
				}
				ws();
				if( getChar() == '>' )
				{
					usedChar();

					addEntity( name.c_str(), value.c_str() );
				}
				else
				{
					throw XmlException(
						"Malformed ENTITY:  unexpected '%c' found.",
						getChar()
						);
				}
			}
			else
			{
				throw XmlException(
					"Unsupported header symbol: %s",
					buf.c_str()
					);
			}
		}
		else
		{
			return;
		}
	}
}

bool XmlReader::node()
{
	gcall( startNode() )

	// At this point, we are closing the startNode
	char chr = getChar();
	if( chr == '>' )
	{
		usedChar();

		// Now we process the guts of the node.
		gcall( content() );
	}
	else if( chr == '/' )
	{
		// This is the tricky one, one more validation, then we close the node.
		usedChar();
		if( getChar() == '>' )
		{
			closeNode();
			usedChar();
		}
		else
		{
			throw XmlException("Close node in singleNode malformed!");
		}
	}
	else
	{
		throw XmlException("Close node expected, but not found.");
		return false;
	}

	return true;
}

bool XmlReader::startNode()
{
	if( getChar() == '<' )
	{
		usedChar();

		if( getChar() == '/' )
		{
			// Heh, it's actually a close node, go figure
			FlexBuf fbName;
			usedChar();
			gcall( ws() );

			while( true )
			{
				char chr = getChar();
				if( isws( chr ) || chr == '>' )
				{
					// Here we actually compare the name we got to the name
					// we already set, they have to match exactly.
					if( !strcasecmp( getCurrent()->getName(), fbName.getData() ) )
					{
						closeNode();
						break;
					}
					else
					{
						throw XmlException("Got a mismatched node close tag.");
					}
				}
				else
				{
					fbName.appendData( chr );
					usedChar();
				}
			}

			gcall( ws() );
			if( getChar() == '>' )
			{
				// Everything is cool.
				usedChar();
			}
			else
			{
				throw XmlException("Got extra junk data instead of node close tag.");
			}
		}
		else
		{
			// We're good, format is consistant
			addNode();

			// Skip extra whitespace
			gcall( ws() );
			gcall( name() );
			gcall( ws() );
			gcall( paramlist() );
			gcall( ws() );
		}
	}
	else
	{
		throw XmlException("Expected to find node opening char, '<'.");
	}

	return true;
}

bool XmlReader::name()
{
	FlexBuf fbName;
	
	while( true )
	{
		char chr = getChar();
		if( isws( chr ) || chr == '>' || chr == '/' )
		{
			setName( fbName.getData() );
			return true;
		}
		else
		{
			fbName.appendData( chr );
			usedChar();
		}
	}

	return true;
}

bool XmlReader::paramlist()
{
	while( true )
	{
		char chr = getChar();
		if( chr == '/' || chr == '>' )
		{
			return true;
		}
		else
		{
			gcall( param() );
			gcall( ws() );
		}
	}
	
	return true;
}

StaticString *XmlReader::getEscape()
{
	if( getChar( 1 ) == '#' )
	{
		// If the entity starts with a # it's a character escape code
		int base = 10;
		usedChar( 2 );
		if( getChar() == 'x' )
		{
			base = 16;
			usedChar();
		}
		char buf[4];
		int j = 0;
		for( j = 0; getChar() != ';'; j++ )
		{
			buf[j] = getChar();
			usedChar();
		}
		usedChar();
		buf[j] = '\0';
		buf[0] = (char)strtol( buf, (char **)NULL, base );
		buf[1] = '\0';

		return new StaticString( buf );
	}
	else
	{
		// ...otherwise replace with the appropriate string...
		std::string buf;
		usedChar();
		for(;;)
		{
			char cbuf = getChar();
			usedChar();
			if( cbuf == ';' ) break;
			buf += cbuf;
		}

		StaticString *tmp = (StaticString *)htEntity[buf.c_str()];
		if( tmp == NULL ) return NULL;

		StaticString *ret = new StaticString( *tmp );
		return ret;
	}
}

bool XmlReader::param()
{
	FlexBuf fbName;
	FlexBuf fbValue;

	while( true )
	{
		char chr = getChar();
		if( isws( chr ) || chr == '=' )
		{
			break;
		}
		else
		{
			fbName.appendData( chr );
			usedChar();
		}
	}

	gcall( ws() );

	if( getChar() == '=' )
	{
		usedChar();

		gcall( ws() );

		char chr = getChar();
		if( chr == '"' )
		{
			// Better quoted rhs
			usedChar();

			while( true )
			{
				chr = getChar();
				if( chr == '"' )
				{
					usedChar();
					addProperty( fbName.getData(), fbValue.getData() );
					return true;
				}
				else
				{
					if( chr == '&' )
					{
						StaticString *tmp = getEscape();
						if( tmp == NULL ) return false;
						fbValue.appendData( tmp->getString() );
						delete tmp;
					}
					else
					{
						fbValue.appendData( chr );
						usedChar();
					}
				}
			}
		}
		else
		{
			// Simple one-word rhs
			while( true )
			{
				chr = getChar();
				if( isws( chr ) || chr == '/' || chr == '>' )
				{
					addProperty( fbName.getData(), fbValue.getData() );
					return true;
				}
				else
				{
					if( chr == '&' )
					{
						StaticString *tmp = getEscape();
						if( tmp == NULL ) return false;
						fbValue.appendData( tmp->getString() );
						delete tmp;
					}
					else
					{
						fbValue.appendData( chr );
						usedChar();
					}
				}
			}
		}
	}
	else
	{
		throw XmlException("Expected an equals to seperate the params.");
		return false;
	}

	return true;
}

bool XmlReader::content()
{
	FlexBuf fbContent;

	if( bStrip ) gcall( ws() );

	while( true )
	{
		char chr = getChar();
		if( chr == '<' )
		{
			if( getChar(1) == '/' )
			{
				if( fbContent.getLength() > 0 )
				{
					if( bStrip )
					{
						int j;
						for( j = fbContent.getLength()-1; isws(fbContent.getData()[j]); j-- );
						((char *)fbContent.getData())[j+1] = '\0';
					}
					setContent( fbContent.getData() );
				}
				usedChar( 2 );
				gcall( ws() );
				FlexBuf fbName;
				while( true )
				{
					chr = getChar();
					if( isws( chr ) || chr == '>' )
					{
						if( !strcasecmp( getCurrent()->getName(), fbName.getData() ) )
						{
							closeNode();
							break;
						}
						else
						{
							throw XmlException("Mismatched close tag found: <%s> to <%s>.", getCurrent()->getName(), fbName.getData() );
						}
					}
					else
					{
						fbName.appendData( chr );
						usedChar();
					}
				}
				gcall( ws() );
				if( getChar() == '>' )
				{
					usedChar();
					return true;
				}
				else
				{
					throw XmlException("Malformed close tag.");
				}
			}
			else if( getChar(1) == '!' )
			{
				// We know it's a comment, let's see if it's proper
				if( getChar(2) != '-' ||
					getChar(3) != '-' )
				{
					// Not a valid XML comment
					throw XmlException("Malformed comment start tag found.");
				}

				usedChar( 4 );
				
				// Now burn text until we find the close tag
				for(;;)
				{
					if( getChar() == '-' )
					{
						if( getChar( 1 ) == '-' )
						{
							// The next one has to be a '>' now
							if( getChar( 2 ) != '>' )
							{
								throw XmlException("Malformed comment close tag found.  You cannot have a '--' that isn't followed by a '>' in a comment.");
							}
							usedChar( 3 );
							break;
						}
						else
						{
							// Found a dash followed by a non dash, that's ok...
							usedChar( 2 );
						}
					}
					else
					{
						// Burn comment chars
						usedChar();
					}
				}
			}
			else
			{
				if( fbContent.getLength() > 0 )
				{
					if( bStrip )
					{
						int j;
						for( j = fbContent.getLength()-1; isws(fbContent.getData()[j]); j-- );
						((char *)fbContent.getData())[j+1] = '\0';
					}
					setContent( fbContent.getData() );
					fbContent.clearData();
				}
				gcall( node() );
			}

			if( bStrip ) gcall( ws() );
		}
		else if( chr == '&' )
		{
			StaticString *tmp = getEscape();
			if( tmp == NULL ) return false;
			fbContent.appendData( tmp->getString() );
			delete tmp;
		}
		else
		{
			fbContent.appendData( chr );
			usedChar();
		}
	}
}