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authorMike Buland <eichlan@xagasoft.com>2007-06-12 01:28:27 +0000
committerMike Buland <eichlan@xagasoft.com>2007-06-12 01:28:27 +0000
commit4cb166570a8e2e97216bf6c7aeb99b971ff58ad7 (patch)
treeb8d22af96957666ac761b6ca1b57da1eee2e56a5 /src/xmlreader.cpp
parentb6f50f249ba3b18c597531a2d5dbc45f7bfa3eaa (diff)
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Moved out the xml system again. I think that if I am going to do it again,
I'm going to do it over from scratch, that was just painful. Also, started in again on the server system, it's looking pretty good, already got connections working, next up is managing data flow through clients and protocols!
Diffstat (limited to 'src/xmlreader.cpp')
-rw-r--r--src/xmlreader.cpp604
1 files changed, 0 insertions, 604 deletions
diff --git a/src/xmlreader.cpp b/src/xmlreader.cpp
deleted file mode 100644
index 38cad5f..0000000
--- a/src/xmlreader.cpp
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@@ -1,604 +0,0 @@
1#include "bu/xmlreader.h"
2#include "bu/exceptions.h"
3#include <string.h>
4
5XmlReader::XmlReader( Bu::Stream &sIn, bool bStrip ) :
6 sIn( sIn ),
7 bStrip( bStrip )
8{
9 buildDoc();
10}
11
12XmlReader::~XmlReader()
13{
14}
15
16char XmlReader::getChar( int nIndex )
17{
18 if( sBuf.getSize() <= nIndex )
19 {
20 int nInc = nIndex-sBuf.getSize()+1;
21 char *buf = new char[nInc];
22 sIn.read( buf, nInc );
23 sBuf.append( buf, nInc );
24 delete[] buf;
25 }
26
27 return sBuf[nIndex];
28}
29
30void XmlReader::usedChar( int nAmnt )
31{
32 if( nAmnt >= sBuf.getSize() )
33 {
34 sBuf.clear();
35 }
36 else
37 {
38 char *s = sBuf.getStr();
39 memcpy( s, s+nAmnt, sBuf.getSize()-nAmnt );
40 sBuf.resize( sBuf.getSize()-nAmnt );
41 }
42}
43
44void XmlReader::addEntity( const Bu::FString &name, const Bu::FString &value )
45{
46 htEntity[name] = value;
47}
48
49#define gcall( x ) if( x == false ) return false;
50
51bool XmlReader::isws( char chr )
52{
53 return ( chr == ' ' || chr == '\t' || chr == '\n' || chr == '\r' );
54}
55
56bool XmlReader::ws()
57{
58 while( true )
59 {
60 char chr = getChar();
61 if( isws( chr ) )
62 {
63 usedChar();
64 }
65 else
66 {
67 return true;
68 }
69 }
70 return true;
71}
72
73bool XmlReader::buildDoc()
74{
75 // take care of initial whitespace
76 gcall( ws() );
77 textDecl();
78 entity();
79 addEntity("gt", ">");
80 addEntity("lt", "<");
81 addEntity("amp", "&");
82 addEntity("apos", "\'");
83 addEntity("quot", "\"");
84 gcall( node() );
85
86 return true;
87}
88
89void XmlReader::textDecl()
90{
91 if( getChar() == '<' && getChar( 1 ) == '?' )
92 {
93 usedChar( 2 );
94 for(;;)
95 {
96 if( getChar() == '?' )
97 {
98 if( getChar( 1 ) == '>' )
99 {
100 usedChar( 2 );
101 return;
102 }
103 }
104 usedChar();
105 }
106 }
107}
108
109void XmlReader::entity()
110{
111 for(;;)
112 {
113 ws();
114
115 if( getChar() == '<' && getChar( 1 ) == '!' )
116 {
117 usedChar( 2 );
118 ws();
119 Bu::FString buf;
120 for(;;)
121 {
122 char chr = getChar();
123 usedChar();
124 if( isws( chr ) ) break;
125 buf += chr;
126 }
127
128 if( strcmp( buf.c_str(), "ENTITY") == 0 )
129 {
130 ws();
131 Bu::FString name;
132 for(;;)
133 {
134 char chr = getChar();
135 usedChar();
136 if( isws( chr ) ) break;
137 name += chr;
138 }
139 ws();
140 char quot = getChar();
141 usedChar();
142 if( quot != '\'' && quot != '\"' )
143 {
144 throw Bu::XmlException(
145 "Only quoted entity values are supported."
146 );
147 }
148 Bu::FString value;
149 for(;;)
150 {
151 char chr = getChar();
152 usedChar();
153 if( chr == '&' )
154 {
155 Bu::FString tmp = getEscape();
156 value += tmp;
157 }
158 else if( chr == quot )
159 {
160 break;
161 }
162 else
163 {
164 value += chr;
165 }
166 }
167 ws();
168 if( getChar() == '>' )
169 {
170 usedChar();
171
172 addEntity( name.c_str(), value.c_str() );
173 }
174 else
175 {
176 throw Bu::XmlException(
177 "Malformed ENTITY: unexpected '%c' found.",
178 getChar()
179 );
180 }
181 }
182 else
183 {
184 throw Bu::XmlException(
185 "Unsupported header symbol: %s",
186 buf.c_str()
187 );
188 }
189 }
190 else
191 {
192 return;
193 }
194 }
195}
196
197bool XmlReader::node()
198{
199 gcall( startNode() )
200
201 // At this point, we are closing the startNode
202 char chr = getChar();
203 if( chr == '>' )
204 {
205 usedChar();
206
207 // Now we process the guts of the node.
208 gcall( content() );
209 }
210 else if( chr == '/' )
211 {
212 // This is the tricky one, one more validation, then we close the node.
213 usedChar();
214 if( getChar() == '>' )
215 {
216 closeNode();
217 usedChar();
218 }
219 else
220 {
221 throw Bu::XmlException("Close node in singleNode malformed!");
222 }
223 }
224 else
225 {
226 throw Bu::XmlException("Close node expected, but not found.");
227 return false;
228 }
229
230 return true;
231}
232
233bool XmlReader::startNode()
234{
235 if( getChar() == '<' )
236 {
237 usedChar();
238
239 if( getChar() == '/' )
240 {
241 // Heh, it's actually a close node, go figure
242 Bu::FString sName;
243 usedChar();
244 gcall( ws() );
245
246 while( true )
247 {
248 char chr = getChar();
249 if( isws( chr ) || chr == '>' )
250 {
251 // Here we actually compare the name we got to the name
252 // we already set, they have to match exactly.
253 if( getCurrent()->getName() == sName )
254 {
255 closeNode();
256 break;
257 }
258 else
259 {
260 throw Bu::XmlException("Got a mismatched node close tag.");
261 }
262 }
263 else
264 {
265 sName += chr;
266 usedChar();
267 }
268 }
269
270 gcall( ws() );
271 if( getChar() == '>' )
272 {
273 // Everything is cool.
274 usedChar();
275 }
276 else
277 {
278 throw Bu::XmlException("Got extra junk data instead of node close tag.");
279 }
280 }
281 else
282 {
283 // We're good, format is consistant
284 //addNode();
285
286 // Skip extra whitespace
287 gcall( ws() );
288 gcall( name() );
289 gcall( ws() );
290 gcall( paramlist() );
291 gcall( ws() );
292 }
293 }
294 else
295 {
296 throw Bu::XmlException("Expected to find node opening char, '<'.");
297 }
298
299 return true;
300}
301
302bool XmlReader::name()
303{
304 Bu::FString sName;
305
306 while( true )
307 {
308 char chr = getChar();
309 if( isws( chr ) || chr == '>' || chr == '/' )
310 {
311 addNode( sName );
312 return true;
313 }
314 else
315 {
316 sName += chr;
317 usedChar();
318 }
319 }
320
321 return true;
322}
323
324bool XmlReader::paramlist()
325{
326 while( true )
327 {
328 char chr = getChar();
329 if( chr == '/' || chr == '>' )
330 {
331 return true;
332 }
333 else
334 {
335 gcall( param() );
336 gcall( ws() );
337 }
338 }
339
340 return true;
341}
342
343Bu::FString XmlReader::getEscape()
344{
345 if( getChar( 1 ) == '#' )
346 {
347 // If the entity starts with a # it's a character escape code
348 int base = 10;
349 usedChar( 2 );
350 if( getChar() == 'x' )
351 {
352 base = 16;
353 usedChar();
354 }
355 char buf[4];
356 int j = 0;
357 for( j = 0; getChar() != ';'; j++ )
358 {
359 buf[j] = getChar();
360 usedChar();
361 }
362 usedChar();
363 buf[j] = '\0';
364 buf[0] = (char)strtol( buf, (char **)NULL, base );
365 buf[1] = '\0';
366
367 return buf;
368 }
369 else
370 {
371 // ...otherwise replace with the appropriate string...
372 Bu::FString buf;
373 usedChar();
374 for(;;)
375 {
376 char cbuf = getChar();
377 usedChar();
378 if( cbuf == ';' ) break;
379 buf += cbuf;
380 }
381
382 return htEntity[buf];
383 }
384}
385
386bool XmlReader::param()
387{
388 Bu::FString sName;
389 Bu::FString sValue;
390
391 while( true )
392 {
393 char chr = getChar();
394 if( isws( chr ) || chr == '=' )
395 {
396 break;
397 }
398 else
399 {
400 sName.append( chr );
401 usedChar();
402 }
403 }
404
405 gcall( ws() );
406
407 if( getChar() == '=' )
408 {
409 usedChar();
410
411 gcall( ws() );
412
413 char chr = getChar();
414 if( chr == '"' )
415 {
416 // Better quoted rhs
417 usedChar();
418
419 while( true )
420 {
421 chr = getChar();
422 if( chr == '"' )
423 {
424 usedChar();
425 addProperty( sName.getStr(), sValue.getStr() );
426 return true;
427 }
428 else
429 {
430 if( chr == '&' )
431 {
432 sValue += getEscape();
433 }
434 else
435 {
436 sValue += chr;
437 usedChar();
438 }
439 }
440 }
441 }
442 else
443 {
444 // Simple one-word rhs
445 while( true )
446 {
447 chr = getChar();
448 if( isws( chr ) || chr == '/' || chr == '>' )
449 {
450 addProperty( sName.getStr(), sValue.getStr() );
451 return true;
452 }
453 else
454 {
455 if( chr == '&' )
456 {
457 sValue += getEscape();
458 }
459 else
460 {
461 sValue += chr;
462 usedChar();
463 }
464 }
465 }
466 }
467 }
468 else
469 {
470 throw Bu::XmlException("Expected an equals to seperate the params.");
471 return false;
472 }
473
474 return true;
475}
476
477bool XmlReader::content()
478{
479 Bu::FString sContent;
480
481 if( bStrip ) gcall( ws() );
482
483 while( true )
484 {
485 char chr = getChar();
486 if( chr == '<' )
487 {
488 if( getChar(1) == '/' )
489 {
490 if( sContent.getSize() > 0 )
491 {
492 if( bStrip )
493 {
494 int j;
495 for( j = sContent.getSize()-1; isws(sContent[j]); j-- );
496 sContent[j+1] = '\0';
497 }
498 setContent( sContent.getStr() );
499 }
500 usedChar( 2 );
501 gcall( ws() );
502 Bu::FString sName;
503 while( true )
504 {
505 chr = getChar();
506 if( isws( chr ) || chr == '>' )
507 {
508 if( !strcasecmp( getCurrent()->getName().getStr(), sName.getStr() ) )
509 {
510 closeNode();
511 break;
512 }
513 else
514 {
515 throw Bu::XmlException("Mismatched close tag found: <%s> to <%s>.", getCurrent()->getName().getStr(), sName.getStr() );
516 }
517 }
518 else
519 {
520 sName += chr;
521 usedChar();
522 }
523 }
524 gcall( ws() );
525 if( getChar() == '>' )
526 {
527 usedChar();
528 return true;
529 }
530 else
531 {
532 throw Bu::XmlException("Malformed close tag.");
533 }
534 }
535 else if( getChar(1) == '!' )
536 {
537 // We know it's a comment, let's see if it's proper
538 if( getChar(2) != '-' ||
539 getChar(3) != '-' )
540 {
541 // Not a valid XML comment
542 throw Bu::XmlException("Malformed comment start tag found.");
543 }
544
545 usedChar( 4 );
546
547 // Now burn text until we find the close tag
548 for(;;)
549 {
550 if( getChar() == '-' )
551 {
552 if( getChar( 1 ) == '-' )
553 {
554 // The next one has to be a '>' now
555 if( getChar( 2 ) != '>' )
556 {
557 throw Bu::XmlException("Malformed comment close tag found. You cannot have a '--' that isn't followed by a '>' in a comment.");
558 }
559 usedChar( 3 );
560 break;
561 }
562 else
563 {
564 // Found a dash followed by a non dash, that's ok...
565 usedChar( 2 );
566 }
567 }
568 else
569 {
570 // Burn comment chars
571 usedChar();
572 }
573 }
574 }
575 else
576 {
577 if( sContent.getSize() > 0 )
578 {
579 if( bStrip )
580 {
581 int j;
582 for( j = sContent.getSize()-1; isws(sContent[j]); j-- );
583 sContent[j+1] = '\0';
584 }
585 setContent( sContent.getStr() );
586 sContent.clear();
587 }
588 gcall( node() );
589 }
590
591 if( bStrip ) gcall( ws() );
592 }
593 else if( chr == '&' )
594 {
595 sContent += getEscape();
596 }
597 else
598 {
599 sContent += chr;
600 usedChar();
601 }
602 }
603}
604
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