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authorMike Buland <eichlan@xagasoft.com>2007-04-03 04:50:36 +0000
committerMike Buland <eichlan@xagasoft.com>2007-04-03 04:50:36 +0000
commitda89e6d30e57bd6dbb10b4d36b093ce9bbf5c666 (patch)
tree0c8d31d13521011dc52a3fbadbf9e7e27929308f /src/old/fstring.h
parentf4c20290509d7ed3a8fd5304577e7a4cc0b9d974 (diff)
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The first batch seem to have made it alright. Unfortunately the Archive class
isn't done yet, I'm going to make it rely on streams, so those will be next, then we can make it work all sortsa' well.
Diffstat (limited to '')
-rw-r--r--src/old/fstring.h651
1 files changed, 0 insertions, 651 deletions
diff --git a/src/old/fstring.h b/src/old/fstring.h
deleted file mode 100644
index c5397cc..0000000
--- a/src/old/fstring.h
+++ /dev/null
@@ -1,651 +0,0 @@
1#ifndef F_STRING_H
2#define F_STRING_H
3
4#include <stdint.h>
5#include <memory>
6#include "serializable.h"
7#include "serializer.h"
8
9template< typename chr >
10struct FStringChunk
11{
12 long nLength;
13 chr *pData;
14 FStringChunk *pNext;
15};
16
17/**
18 * Flexible String class. This class was designed with string passing and
19 * generation in mind. Like the standard string class you can specify what
20 * datatype to use for each character. Unlike the standard string class,
21 * collection of appended and prepended terms is done lazily, making long
22 * operations that involve many appends very inexpensive. In addition internal
23 * ref-counting means that if you pass strings around between functions there's
24 * almost no overhead in time or memory since a reference is created and no
25 * data is actually copied. This also means that you never need to put any
26 * FBasicString into a ref-counting container class.
27 */
28template< typename chr, typename chralloc=std::allocator<chr>, typename chunkalloc=std::allocator<struct FStringChunk<chr> > >
29class FBasicString : public Serializable
30{
31#ifndef VALTEST
32#define cpy( dest, src, size ) memcpy( dest, src, size*sizeof(chr) )
33#endif
34private:
35 typedef struct FStringChunk<chr> Chunk;
36 typedef struct FBasicString<chr, chralloc, chunkalloc> MyType;
37
38public:
39 FBasicString() :
40 nLength( 0 ),
41 pnRefs( NULL ),
42 pFirst( NULL ),
43 pLast( NULL )
44 {
45 }
46
47 FBasicString( const chr *pData ) :
48 nLength( 0 ),
49 pnRefs( NULL ),
50 pFirst( NULL ),
51 pLast( NULL )
52 {
53 append( pData );
54 }
55
56 FBasicString( const chr *pData, long nLength ) :
57 nLength( 0 ),
58 pnRefs( NULL ),
59 pFirst( NULL ),
60 pLast( NULL )
61 {
62 append( pData, nLength );
63 }
64
65 FBasicString( const MyType &rSrc ) :
66 nLength( 0 ),
67 pnRefs( NULL ),
68 pFirst( NULL ),
69 pLast( NULL )
70 {
71 // Here we have no choice but to copy, since the other guy is a const.
72 // In the case that the source were flat, we could get a reference, it
73 // would make some things faster, but not matter in many other cases.
74
75 joinShare( rSrc );
76 //copyFrom( rSrc );
77 }
78
79 FBasicString( const MyType &rSrc, long nLength ) :
80 nLength( 0 ),
81 pnRefs( NULL ),
82 pFirst( NULL ),
83 pLast( NULL )
84 {
85 append( rSrc.pFirst->pData, nLength );
86 }
87
88 FBasicString( const MyType &rSrc, long nStart, long nLength ) :
89 nLength( 0 ),
90 pnRefs( NULL ),
91 pFirst( NULL ),
92 pLast( NULL )
93 {
94 append( rSrc.pFirst->pData+nStart, nLength );
95 }
96
97 FBasicString( long nSize ) :
98 nLength( nSize ),
99 pnRefs( NULL ),
100 pFirst( NULL ),
101 pLast( NULL )
102 {
103 pFirst = pLast = newChunk( nSize );
104 }
105
106 virtual ~FBasicString()
107 {
108 clear();
109 }
110
111 void append( const chr *pData )
112 {
113 long nLen;
114 for( nLen = 0; pData[nLen] != (chr)0; nLen++ );
115
116 Chunk *pNew = newChunk( nLen );
117 cpy( pNew->pData, pData, nLen );
118
119 appendChunk( pNew );
120 }
121
122 void append( const chr *pData, long nLen )
123 {
124 Chunk *pNew = newChunk( nLen );
125
126 cpy( pNew->pData, pData, nLen );
127
128 appendChunk( pNew );
129 }
130
131 void prepend( const chr *pData )
132 {
133 long nLen;
134 for( nLen = 0; pData[nLen] != (chr)0; nLen++ );
135
136 Chunk *pNew = newChunk( nLen );
137 cpy( pNew->pData, pData, nLen );
138
139 prependChunk( pNew );
140 }
141
142 void prepend( const chr *pData, long nLen )
143 {
144 Chunk *pNew = newChunk( nLen );
145
146 cpy( pNew->pData, pData, nLen );
147
148 prependChunk( pNew );
149 }
150
151 void clear()
152 {
153 realClear();
154 }
155
156 void resize( long nNewSize )
157 {
158 if( nLength == nNewSize )
159 return;
160
161 flatten();
162
163 Chunk *pNew = newChunk( nNewSize );
164 long nNewLen = (nNewSize<nLength)?(nNewSize):(nLength);
165 cpy( pNew->pData, pFirst->pData, nNewLen );
166 pNew->pData[nNewLen] = (chr)0;
167 aChr.deallocate( pFirst->pData, pFirst->nLength+1 );
168 aChunk.deallocate( pFirst, 1 );
169 pFirst = pLast = pNew;
170 nLength = nNewSize;
171 }
172
173 long getSize() const
174 {
175 return nLength;
176 }
177
178 chr *getStr()
179 {
180 if( pFirst == NULL )
181 return NULL;
182
183 flatten();
184 return pFirst->pData;
185 }
186
187 const chr *getStr() const
188 {
189 if( pFirst == NULL )
190 return NULL;
191
192 flatten();
193 return pFirst->pData;
194 }
195
196 chr *c_str()
197 {
198 if( pFirst == NULL )
199 return NULL;
200
201 flatten();
202 return pFirst->pData;
203 }
204
205 const chr *c_str() const
206 {
207 if( pFirst == NULL )
208 return NULL;
209
210 flatten();
211 return pFirst->pData;
212 }
213
214 MyType &operator +=( const chr *pData )
215 {
216 append( pData );
217
218 return (*this);
219 }
220
221 MyType &operator +=( const MyType &rSrc )
222 {
223 rSrc.flatten();
224 append( rSrc.pFirst->pData, rSrc.nLength );
225
226 return (*this);
227 }
228
229 MyType &operator +=( const chr pData )
230 {
231 chr tmp[2] = { pData, (chr)0 };
232 append( tmp );
233
234 return (*this);
235 }
236
237 MyType &operator =( const chr *pData )
238 {
239 clear();
240 append( pData );
241
242 return (*this);
243 }
244
245 MyType &operator =( const MyType &rSrc )
246 {
247 //if( rSrc.isFlat() )
248 //{
249 joinShare( rSrc );
250 //}
251 //else
252 //{
253 // copyFrom( rSrc );
254 //}
255 //
256
257 return (*this);
258 }
259
260 bool operator ==( const chr *pData ) const
261 {
262 if( pFirst == NULL ) {
263 if( pData == NULL )
264 return true;
265 return false;
266 }
267
268 flatten();
269 const chr *a = pData;
270 chr *b = pFirst->pData;
271 for( ; *a!=(chr)0; a++, b++ )
272 {
273 if( *a != *b )
274 return false;
275 }
276
277 return true;
278 }
279
280 bool operator ==( const MyType &pData ) const
281 {
282 if( pFirst == pData.pFirst )
283 return true;
284 if( pFirst == NULL )
285 return false;
286
287 flatten();
288 pData.flatten();
289 const chr *a = pData.pFirst->pData;
290 chr *b = pFirst->pData;
291 for( ; *a!=(chr)0; a++, b++ )
292 {
293 if( *a != *b )
294 return false;
295 }
296
297 return true;
298 }
299
300 bool operator !=(const chr *pData ) const
301 {
302 return !(*this == pData);
303 }
304
305 bool operator !=(const MyType &pData ) const
306 {
307 return !(*this == pData);
308 }
309
310 chr &operator[]( long nIndex )
311 {
312 flatten();
313
314 return pFirst->pData[nIndex];
315 }
316
317 const chr &operator[]( long nIndex ) const
318 {
319 flatten();
320
321 return pFirst->pData[nIndex];
322 }
323
324 bool isWS( long nIndex ) const
325 {
326 flatten();
327
328 return pFirst->pData[nIndex]==' ' || pFirst->pData[nIndex]=='\t'
329 || pFirst->pData[nIndex]=='\r' || pFirst->pData[nIndex]=='\n';
330 }
331
332 bool isAlpha( long nIndex ) const
333 {
334 flatten();
335
336 return (pFirst->pData[nIndex] >= 'a' && pFirst->pData[nIndex] <= 'z')
337 || (pFirst->pData[nIndex] >= 'A' && pFirst->pData[nIndex] <= 'Z');
338 }
339
340 void toLower()
341 {
342 flatten();
343 unShare();
344
345 for( long j = 0; j < nLength; j++ )
346 {
347 if( pFirst->pData[j] >= 'A' && pFirst->pData[j] <= 'Z' )
348 pFirst->pData[j] -= 'A'-'a';
349 }
350 }
351
352 void toUpper()
353 {
354 flatten();
355 unShare();
356
357 for( long j = 0; j < nLength; j++ )
358 {
359 if( pFirst->pData[j] >= 'a' && pFirst->pData[j] <= 'z' )
360 pFirst->pData[j] += 'A'-'a';
361 }
362 }
363
364 void serialize( class Serializer &ar )
365 {
366 if( ar.isLoading() )
367 {
368 clear();
369 long nLen;
370 ar >> nLen;
371
372 Chunk *pNew = newChunk( nLen );
373 ar.read( pNew->pData, nLen*sizeof(chr) );
374 appendChunk( pNew );
375 }
376 else
377 {
378 flatten();
379
380 ar << nLength;
381 ar.write( pFirst->pData, nLength*sizeof(chr) );
382 }
383 }
384
385private:
386 void flatten() const
387 {
388 if( isFlat() )
389 return;
390
391 if( pFirst == NULL )
392 return;
393
394 unShare();
395
396 Chunk *pNew = newChunk( nLength );
397 chr *pos = pNew->pData;
398 Chunk *i = pFirst;
399 for(;;)
400 {
401 cpy( pos, i->pData, i->nLength );
402 pos += i->nLength;
403 i = i->pNext;
404 if( i == NULL )
405 break;
406 }
407 realClear();
408
409 pLast = pFirst = pNew;
410 nLength = pNew->nLength;
411 }
412
413 void realClear() const
414 {
415 if( pFirst == NULL )
416 return;
417
418 if( isShared() )
419 {
420 decRefs();
421 }
422 else
423 {
424 Chunk *i = pFirst;
425 for(;;)
426 {
427 Chunk *n = i->pNext;
428 aChr.deallocate( i->pData, i->nLength+1 );
429 aChunk.deallocate( i, 1 );
430 if( n == NULL )
431 break;
432 i = n;
433 }
434 pFirst = pLast = NULL;
435 nLength = 0;
436 }
437 }
438
439 void copyFrom( const FBasicString<chr, chralloc, chunkalloc> &rSrc )
440 {
441 if( rSrc.pFirst == NULL )
442 return;
443
444 decRefs();
445
446 Chunk *pNew = newChunk( rSrc.nLength );
447 chr *pos = pNew->pData;
448 Chunk *i = rSrc.pFirst;
449 for(;;)
450 {
451 cpy( pos, i->pData, i->nLength );
452 pos += i->nLength;
453 i = i->pNext;
454 if( i == NULL )
455 break;
456 }
457 clear();
458
459 appendChunk( pNew );
460 }
461
462 bool isFlat() const
463 {
464 return (pFirst == pLast);
465 }
466
467 bool isShared() const
468 {
469 return (pnRefs != NULL);
470 }
471
472 Chunk *newChunk() const
473 {
474 Chunk *pNew = aChunk.allocate( 1 );
475 pNew->pNext = NULL;
476 return pNew;
477 }
478
479 Chunk *newChunk( long nLen ) const
480 {
481 Chunk *pNew = aChunk.allocate( 1 );
482 pNew->pNext = NULL;
483 pNew->nLength = nLen;
484 pNew->pData = aChr.allocate( nLen+1 );
485 pNew->pData[nLen] = (chr)0;
486 return pNew;
487 }
488
489 void appendChunk( Chunk *pNewChunk )
490 {
491 unShare();
492
493 if( pFirst == NULL )
494 pLast = pFirst = pNewChunk;
495 else
496 {
497 pLast->pNext = pNewChunk;
498 pLast = pNewChunk;
499 }
500
501 nLength += pNewChunk->nLength;
502 }
503
504 void prependChunk( Chunk *pNewChunk )
505 {
506 unShare();
507
508 if( pFirst == NULL )
509 pLast = pFirst = pNewChunk;
510 else
511 {
512 pNewChunk->pNext = pFirst;
513 pFirst = pNewChunk;
514 }
515
516 nLength += pNewChunk->nLength;
517 }
518
519 void joinShare( MyType &rSrc )
520 {
521 clear();
522
523 if( !rSrc.isFlat() )
524 rSrc.flatten();
525
526 rSrc.initCount();
527 pnRefs = rSrc.pnRefs;
528 (*pnRefs)++;
529 nLength = rSrc.nLength;
530 pFirst = rSrc.pFirst;
531 pLast = rSrc.pLast;
532 }
533
534 void joinShare( const MyType &rSrc )
535 {
536 clear();
537
538 rSrc.flatten();
539
540 if( !rSrc.isShared() )
541 {
542 rSrc.pnRefs = new uint32_t;
543 (*rSrc.pnRefs) = 1;
544 }
545 pnRefs = rSrc.pnRefs;
546 (*pnRefs)++;
547 nLength = rSrc.nLength;
548 pFirst = rSrc.pFirst;
549 pLast = rSrc.pLast;
550 }
551
552 /**
553 * This takes an object that was shared and makes a copy of the base data
554 * that was being shared so that this copy can be changed. This should be
555 * added before any call that will change this object;
556 */
557 void unShare() const
558 {
559 if( isShared() == false )
560 return;
561
562 Chunk *pNew = newChunk( nLength );
563 chr *pos = pNew->pData;
564 Chunk *i = pFirst;
565 for(;;)
566 {
567 cpy( pos, i->pData, i->nLength );
568 pos += i->nLength;
569 i = i->pNext;
570 if( i == NULL )
571 break;
572 }
573 decRefs();
574 pLast = pFirst = pNew;
575 nLength = pNew->nLength;
576 }
577
578 /**
579 * This decrements our ref count and pulls us out of the share. If the ref
580 * count hits zero because of this, it destroys the share. This is not
581 * safe to call on it's own, it's much better to call unShare.
582 */
583 void decRefs() const
584 {
585 if( isShared() )
586 {
587 (*pnRefs)--;
588 if( (*pnRefs) == 0 )
589 destroyShare();
590 else
591 {
592 pnRefs = NULL;
593 pFirst = NULL;
594 pLast = NULL;
595 nLength = 0;
596 }
597 }
598 }
599
600 /**
601 * While the unShare function removes an instance from a share, this
602 * function destroys the data that was in the share, removing the share
603 * itself. This should only be called when the refcount for the share has
604 * or is about to reach zero.
605 */
606 void destroyShare() const
607 {
608 delete pnRefs;
609 pnRefs = NULL;
610 realClear();
611 }
612
613#ifdef VALTEST
614 void cpy( chr *dest, const chr *src, long count ) const
615 {
616 for( int j = 0; j < count; j++ )
617 {
618 *dest = *src;
619 dest++;
620 src++;
621 }
622 }
623#endif
624
625 void initCount() const
626 {
627 if( !isShared() )
628 {
629 pnRefs = new uint32_t;
630 (*pnRefs) = 1;
631 }
632 }
633
634private:
635 mutable long nLength;
636 mutable uint32_t *pnRefs;
637 mutable Chunk *pFirst;
638 mutable Chunk *pLast;
639
640 mutable chralloc aChr;
641 mutable chunkalloc aChunk;
642};
643
644typedef FBasicString<char> FString;
645
646#include "hash.h"
647template<> uint32_t __calcHashCode<FString>( const FString &k );
648template<> bool __cmpHashKeys<FString>( const FString &a, const FString &b );
649
650
651#endif
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