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path: root/shared-code/Dynamide.h
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-rw-r--r--shared-code/Dynamide.h443
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diff --git a/shared-code/Dynamide.h b/shared-code/Dynamide.h
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1#ifndef __DYNAMIDE_H
2#define __DYNAMIDE_H
3
4#include "LRUCache.h"
5
6namespace Klever {
7
8template<int fbSize,int bSize>
9class CDynamide : public CObject {
10 structfirstBlock {
11 LONGfreeFile;
12 BYTEcrap[fbSize-sizeof(LONG)];
13 };
14 structtheBlock {
15 LONGnext;
16 BYTEdata[bSize-sizeof(LONG)];
17 };
18public:
19 static firstBlock FirstBlock;
20 static theBlock TheBlock;
21private:
22 classCDynaCache : public CLRUCache<DWORD,DWORD,theBlock> {
23 public:
24 CFile* m_File;
25 BOOL m_bAutodelete;
26 CDynaCache(CFile* file,BOOL bAutodelete=TRUE) : CLRUCache<DWORD,DWORD,theBlock>(64) {
27 m_File=file;
28 m_bAutodelete=bAutodelete;
29 }
30 virtual ~CDynaCache() {
31 Flush();
32 if(m_bAutodelete){
33 m_File->Close();
34 delete m_File;
35 }
36 }
37 virtual BOOL _ReadIn(DWORD idx,theBlock* data) {
38 LONG p = sizeof(firstBlock)+idx*sizeof(theBlock);
39 LONG s = m_File->Seek(p,CFile::begin);
40 if(p==s){
41 UINT rb = m_File->Read(data,sizeof(*data));
42 if(rb==sizeof(*data))
43 return TRUE;
44 if(rb)
45 return FALSE;
46 memset(data,0,sizeof(*data));
47 data->next=-1;
48 try{
49 m_File->Write(data,sizeof(*data));
50 }catch(CException* e){
51 e->Delete();
52 return FALSE;
53 }
54 }else{
55 LONG togo = p-s;
56 ASSERT(togo>0);
57 ASSERT(!(togo%sizeof(theBlock)));
58 memset(data,0,sizeof(*data));
59 data->next=-1;
60 while(togo>=0){
61 try{
62 m_File->Write(data,sizeof(*data));
63 }catch(CException* e){
64 e->Delete();
65 return FALSE;
66 }
67 }
68 }
69 return TRUE;
70 }
71 virtual BOOL _WriteOut(DWORD idx,theBlock* data) {
72 LONG p = sizeof(firstBlock)+idx*sizeof(theBlock);
73 LONG s = m_File->Seek(p,CFile::begin);
74 if(p!=s)
75 return FALSE;
76 try{
77 m_File->Write(data,sizeof(*data));
78 }catch(CException* e){
79 e->Delete();
80 return FALSE;
81 }
82 return TRUE;
83 }
84 DWORD AllocateNode() {
85 LONG l = m_File->GetLength();
86 ASSERT(!((l-sizeof(firstBlock))%sizeof(theBlock)));
87 m_File->SetLength(l+sizeof(theBlock));
88 return (l-sizeof(firstBlock))/sizeof(theBlock);
89 }
90 BOOL Read1stBlock(firstBlock* fb) {
91 m_File->SeekToBegin();
92 UINT rb = m_File->Read(fb,sizeof(*fb));
93 if(rb==sizeof(*fb))
94 return TRUE;
95 if(rb)
96 return FALSE;
97 memset(fb,0,sizeof(*fb));
98 fb->freeFile = -1;
99 try{
100 m_File->Write(fb,sizeof(*fb));
101 }catch(CException* e){
102 e->Delete();
103 return FALSE;
104 }
105 return TRUE;
106 }
107 BOOL Write1stBlock(firstBlock* fb) {
108 m_File->SeekToBegin();
109 try{
110 m_File->Write(fb,sizeof(*fb));
111 }catch(CException* e){
112 e->Delete();
113 return FALSE;
114 }
115 return TRUE;
116 }
117 };
118public:
119 class CDynaFile : public CFile{
120 public:
121 CDynamide<fbSize,bSize>* m_Daddy;
122 CArray<LONG,LONG> m_Blocks;
123 LONG m_Position;
124
125 CDynaFile(CDynamide<fbSize,bSize>* daddy) : m_Daddy(NULL) { AttachToDaddy(daddy); }
126 virtual ~CDynaFile() { Close(); DetachFromDaddy(); }
127
128 void AttachToDaddy(CDynamide<fbSize,bSize>* daddy) {
129 ASSERT(!m_Daddy);
130 ASSERT(daddy);
131 m_Daddy=daddy;
132 m_Daddy->AttachDynaFile(this);
133 }
134 void DetachFromDaddy() {
135 ASSERT(m_Daddy);
136 ASSERT(!IsOpened());
137 m_Daddy->DetachDynaFile(this);
138 m_Daddy=NULL;
139 }
140
141 BOOL Create() {
142 if(IsOpened())
143 return FALSE;
144 m_Blocks.SetAtGrow(0,m_Daddy->Allocate());
145 ASSERT(m_Blocks[0]>=0);
146 m_Position=0;
147 return TRUE;
148 }
149 BOOL Open(LONG fb) {
150 if(IsOpened())
151 return FALSE;
152 ASSERT(fb>=0);
153 theBlock* b;
154 do{
155 m_Blocks.Add(fb);
156 b = m_Daddy->m_File->GetCached(fb);
157 ASSERT(b);
158 fb=b->next;
159 if(m_Blocks[m_Blocks.GetUpperBound()]==fb)
160 return FALSE;
161 }while(fb>=0);
162 m_Position=0;
163 return TRUE;
164 }
165
166 LONG GetFile() {
167 if(!IsOpened())
168 return -1;
169 return m_Blocks[0];
170 }
171 virtual DWORD GetPosition() const {
172 if(!IsOpened())
173 return 0;
174 if(m_Position<0)
175 return 0;
176 if(m_Position>GetLength())
177 return GetLength();
178 return m_Position;
179 }
180 virtual CString GetFileName() {
181 CString rv;
182 if(IsOpened())
183 rv.Format("0x%08lX",m_Blocks[0]);
184 else
185 rv.Format("None");
186 return rv;
187 }
188 virtual CString GetFileTitle() { return GetFileName(); }
189 virtual CString GetFilePath() { return GetFileName(); }
190 virtual void SetFilePath(LPCTSTR lpszNewName) { ASSERT(FALSE); }
191
192 virtual BOOL Open(LPCTSTR lpszFileName, UINT nOpenFlags, CFileException* pError = NULL) { ASSERT(FALSE); return FALSE; }
193 virtual CFile* Duplicate() { ASSERT(FALSE); return NULL; }
194
195 virtual LONG Seek(LONG lOff, UINT nFrom) {
196 if(!IsOpened())
197 return -1;
198 switch(nFrom){
199 case CFile::begin:
200 m_Position=lOff;
201 break;
202 case CFile::current:
203 m_Position+=lOff;
204 break;
205 case CFile::end:
206 m_Position=GetLength()+lOff;
207 break;
208 default:
209 ASSERT(FALSE);
210 return -1;
211 }
212 if(m_Position<0)
213 m_Position=0;
214 if(m_Position>GetLength())
215 m_Position=GetLength();
216 return m_Position;
217 }
218 virtual void SetLength(DWORD dwNewLen) {
219 if(!IsOpened())
220 return;
221 if(dwNewLen<GetLength()){
222 dwNewLen=dwNewLen+sizeof(TheBlock.data);
223 dwNewLen-=dwNewLen%sizeof(TheBlock.data);
224 while(dwNewLen<GetLength() && m_Blocks.GetSize()>1){
225 LONG mb = m_Blocks[m_Blocks.GetUpperBound()];
226 LONG mb1 = m_Blocks[m_Blocks.GetUpperBound()-1];
227 theBlock* b = m_Daddy->m_File->GetCached(mb1);
228 ASSERT(b);
229 ASSERT(b->next==mb);
230 b->next=-1;
231 m_Daddy->m_File->MakeDirty(mb1);
232 m_Daddy->Deallocate(mb);
233 m_Blocks.SetSize(m_Blocks.GetSize()-1);
234 }
235 }else{
236 while(dwNewLen>GetLength()){
237 LONG mb = m_Blocks[m_Blocks.GetUpperBound()];
238 LONG newBlock = m_Daddy->Allocate();
239 ASSERT(newBlock>=0);
240 theBlock* b = m_Daddy->m_File->GetCached(mb);
241 ASSERT(b);
242 ASSERT(b->next<0);
243 b->next=newBlock;
244 m_Daddy->m_File->MakeDirty(mb);
245 m_Blocks.Add(newBlock);
246 }
247 }
248 }
249 virtual DWORD GetLength() const {
250 return ((long)m_Blocks.GetSize())*((long)sizeof(TheBlock.data));
251 }
252
253 virtual UINT Read(void* lpBuf, UINT nCount) {
254 UINT rv = 0;
255 ASSERT(m_Position>=0 && m_Position<=GetLength());
256 LPBYTE data = (LPBYTE)lpBuf;
257 while(nCount && m_Position<GetLength()){
258 UINT bn = m_Position/sizeof(TheBlock.data);
259 UINT bo = m_Position%sizeof(TheBlock.data);
260 theBlock* b = m_Daddy->m_File->GetCached(m_Blocks[bn]);
261 ASSERT(b);
262 UINT bc = min(nCount,sizeof(TheBlock.data)-bo);
263 memmove(data,&b->data[bo],bc);
264 nCount-=bc;
265 data=&data[bc];
266 rv+=bc;
267 m_Position+=bc;
268 }
269 return rv;
270 }
271 virtual void Write(const void* lpBuf, UINT nCount) {
272 ASSERT(m_Position>=0 && m_Position<=GetLength());
273 LPBYTE data = (LPBYTE)lpBuf;
274 while(nCount){
275 UINT bn = m_Position/sizeof(TheBlock.data);
276 UINT bo = m_Position%sizeof(TheBlock.data);
277 while(bn>=m_Blocks.GetSize()){
278 LONG mb = m_Blocks[m_Blocks.GetUpperBound()];
279 LONG newBlock = m_Daddy->Allocate();
280 ASSERT(newBlock>=0);
281 theBlock* b = m_Daddy->m_File->GetCached(mb);
282 ASSERT(b);
283 ASSERT(b->next<0);
284 b->next=newBlock;
285 m_Daddy->m_File->MakeDirty(mb);
286 m_Blocks.Add(newBlock);
287 }
288 theBlock* b = m_Daddy->m_File->GetCached(m_Blocks[bn]);
289 ASSERT(b);
290 UINT bc = min(nCount,sizeof(TheBlock.data)-bo);
291 memmove(&b->data[bo],data,bc);
292 m_Daddy->m_File->MakeDirty(m_Blocks[bn]);
293 nCount-=bc;
294 data=&data[bc];
295 m_Position+=bc;
296 }
297 }
298
299 virtual void LockRange(DWORD dwPos, DWORD dwCount) { ASSERT(FALSE); }
300 virtual void UnlockRange(DWORD dwPos, DWORD dwCount) { ASSERT(FALSE); }
301
302 virtual void Abort() { ASSERT(FALSE); }
303 virtual void Flush() {
304 m_Daddy->m_File->Flush();
305 }
306 virtual void Close() {
307 m_Blocks.RemoveAll();
308 }
309
310 BOOL IsOpened() const { return m_Blocks.GetSize()!=0; }
311 };
312
313 CDynaCache* m_File;
314 firstBlock m_FB;
315
316 CDynamide() : m_File(NULL) {}
317 ~CDynamide() { Close(); }
318
319 BOOL AttachDynaFile(CDynaFile* f) {
320 //ASSERT(!m_Files.Find(f));
321 //m_Files.AddHead(f);
322 return TRUE;
323 }
324 BOOL DetachDynaFile(CDynaFile* f) {
325 //POSITION p = m_Files.Find(f);
326 //ASSERT(p);
327 //m_Files.RemoveAt(p);
328 return TRUE;
329 }
330
331 BOOL Open(LPCTSTR file,BOOL bRO=FALSE) {
332 Close();
333 try{
334 CFile* f = new CFile(file,CFile::typeBinary|(bRO?CFile::modeRead|CFile::shareDenyWrite:CFile::modeReadWrite|CFile::shareDenyRead));
335 return Attach(f,TRUE);
336 }catch(CException* e){
337 e->Delete();
338 return FALSE;
339 }
340 }
341 BOOL Create(LPCTSTR file) {
342 Close();
343 try{
344 CFile* f = new CFile(file,CFile::typeBinary|CFile::modeCreate|CFile::modeReadWrite|CFile::shareDenyRead);
345 return Attach(f,TRUE);
346 }catch(CException* e){
347 e->Delete();
348 return FALSE;
349 }
350 }
351 BOOL Attach(CFile* file,BOOL bAutodelete=TRUE) {
352 if(IsOpened())
353 return FALSE;
354 m_File = new CDynaCache(file,bAutodelete);
355 if(!m_File->Read1stBlock(&m_FB)){
356 memset(&m_FB,0,sizeof(m_FB));
357 m_FB.freeFile=-1;
358 VERIFY(m_File->Write1stBlock(&m_FB));
359 }
360 return IsOpened();
361 }
362 // CFile* Detach();
363 BOOL Close() {
364 if(!IsOpened())
365 return FALSE;
366 m_File->Write1stBlock(&m_FB);
367 delete m_File;
368 m_File=NULL;
369 return TRUE;
370 }
371 BOOL IsOpened() {
372 return m_File != NULL;
373 }
374 BOOL Write1stBlock(void) {
375 if(!IsOpened())
376 return FALSE;
377 VERIFY(m_File->Write1stBlock(&m_FB));
378 return TRUE;
379 }
380
381 CDynaFile* CreateFile() {
382 CDynaFile* rv = new CDynaFile(this);
383 if(rv->Create())
384 return rv;
385 delete rv;
386 return NULL;
387 }
388 CDynaFile* OpenFile(LONG fb) {
389 CDynaFile* rv = new CDynaFile(this);
390 if(rv->Open(fb))
391 return rv;
392 delete rv;
393 return NULL;
394 }
395 BOOL DeleteFile(LONG fb) {
396 while(fb>=0){
397 theBlock* b = m_File->GetCached(fb);
398 LONG nb = b->next;
399 Deallocate(fb);
400 fb=nb;
401 }
402 return TRUE;
403 }
404
405 LONG Allocate() {
406 if(!IsOpened())
407 return -1;
408 if(m_FB.freeFile<0){
409 LONG rv = m_File->AllocateNode();
410 theBlock *b = m_File->GetCached(rv);
411 b->next=-1;
412 m_File->MakeDirty(rv);
413 return rv;
414 }
415 LONG rv = m_FB.freeFile;
416 theBlock *b = m_File->GetCached(rv);
417 m_FB.freeFile=b->next;
418 b->next=-1;
419 m_File->MakeDirty(rv);
420 m_File->Write1stBlock(&m_FB);
421 return rv;
422 }
423 BOOL Deallocate(LONG bk) {
424 if(!IsOpened())
425 return FALSE;
426 theBlock* b = m_File->GetCached(bk);
427 ASSERT(b);
428 if(m_FB.freeFile<0){
429 b->next=-1;
430 m_FB.freeFile=bk;
431 }else{
432 b->next=m_FB.freeFile;
433 m_FB.freeFile=bk;
434 }
435 m_File->MakeDirty(bk);
436 m_File->Write1stBlock(&m_FB);
437 return TRUE;
438 }
439};
440
441};
442
443#endif // __DYNAMIDE_H