src/Git/gitindex.h

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2011 - TortoiseGit
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19
  20 #include "GitHash.h"
  21 #include "gitdll.h"
  22 #include "gitstatus.h"
  23 #include "SharedMutex.h"
  24
  25 /* Copy from Git cache.h*/
  26 #define FLEX_ARRAY 4
  27
  28 #pragma pack(push)
  29 #pragma pack(1)
  30 //#pragma pack(show)
  31 #define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  32 struct cache_header {
  33         unsigned int hdr_signature;
  34         unsigned int hdr_version;
  35         unsigned int hdr_entries;
  36 };
  37
  38 /*
  39  * The "cache_time" is just the low 32 bits of the
  40  * time. It doesn't matter if it overflows - we only
  41  * check it for equality in the 32 bits we save.
  42  */
  43 struct cache_time {
  44         UINT32 sec;
  45         UINT32 nsec;
  46 };
  47
  48 /*
  49  * dev/ino/uid/gid/size are also just tracked to the low 32 bits
  50  * Again - this is just a (very strong in practice) heuristic that
  51  * the inode hasn't changed.
  52  *
  53  * We save the fields in big-endian order to allow using the
  54  * index file over NFS transparently.
  55  */
  56 struct ondisk_cache_entry {
  57         struct cache_time ctime;
  58         struct cache_time mtime;
  59         UINT32 dev;
  60         UINT32 ino;
  61         UINT32 mode;
  62         UINT32 uid;
  63         UINT32 gid;
  64         UINT32 size;
  65         BYTE sha1[20];
  66         UINT16 flags;
  67         char name[FLEX_ARRAY]; /* more */
  68 };
  69
  70 /*
  71  * This struct is used when CE_EXTENDED bit is 1
  72  * The struct must match ondisk_cache_entry exactly from
  73  * ctime till flags
  74  */
  75 struct ondisk_cache_entry_extended {
  76         struct cache_time ctime;
  77         struct cache_time mtime;
  78         UINT32 dev;
  79         UINT32 ino;
  80         UINT32 mode;
  81         UINT32 uid;
  82         UINT32 gid;
  83         UINT32 size;
  84         BYTE sha1[20];
  85         UINT16 flags;
  86         UINT16 flags2;
  87         char name[FLEX_ARRAY]; /* more */
  88 };
  89
  90 #pragma pack(pop)
  91
  92 #define CE_NAMEMASK  (0x0fff)
  93 #define CE_STAGEMASK (0x3000)
  94 #define CE_EXTENDED  (0x4000)
  95 #define CE_VALID     (0x8000)
  96 #define CE_STAGESHIFT 12
  97 /*
  98  * Range 0xFFFF0000 in ce_flags is divided into
  99  * two parts: in-memory flags and on-disk ones.
 100  * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 101  * if you want to save a new flag, add it in
 102  * CE_EXTENDED_FLAGS
 103  *
 104  * In-memory only flags
 105  */
 106 #define CE_UPDATE    (0x10000)
 107 #define CE_REMOVE    (0x20000)
 108 #define CE_UPTODATE  (0x40000)
 109 #define CE_ADDED     (0x80000)
 110
 111 #define CE_HASHED    (0x100000)
 112 #define CE_UNHASHED  (0x200000)
 113
 114 /*
 115  * Extended on-disk flags
 116  */
 117 #define CE_INTENT_TO_ADD 0x20000000
 118 /* CE_EXTENDED2 is for future extension */
 119 #define CE_EXTENDED2 0x80000000
 120
 121 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD)
 122
 123 /*
 124  * Safeguard to avoid saving wrong flags:
 125  *  - CE_EXTENDED2 won't get saved until its semantic is known
 126  *  - Bits in 0x0000FFFF have been saved in ce_flags already
 127  *  - Bits in 0x003F0000 are currently in-memory flags
 128  */
 129 #if CE_EXTENDED_FLAGS & 0x803FFFFF
 130 #error "CE_EXTENDED_FLAGS out of range"
 131 #endif
 132
 133 /*
 134  * Copy the sha1 and stat state of a cache entry from one to
 135  * another. But we never change the name, or the hash state!
 136  */
 137 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 138
 139 template<class T>
 140 T Big2lit(T data)
 141 {
 142         T ret;
 143         BYTE *p1=(BYTE*)&data;
 144         BYTE *p2=(BYTE*)&ret;
 145         for(int i=0;i<sizeof(T);i++)
 146         {
 147                 p2[sizeof(T)-i-1] = p1[i];
 148         }
 149         return ret;
 150 }
 151
 152 template<class T>
 153 static inline size_t ce_namelen(T *ce)
 154 {
 155         size_t len = Big2lit(ce->flags) & CE_NAMEMASK;
 156         if (len < CE_NAMEMASK)
 157                 return len;
 158         return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 159 }
 160
 161 #define flexible_size(STRUCT,len) ((offsetof(STRUCT,name) + (len) + 8) & ~7)
 162
 163 //#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 164 //#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 165
 166 //#define ondisk_ce_size(ce) (((ce)->flags & CE_EXTENDED) ? \
 167 //                          ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 168 //                          ondisk_cache_entry_size(ce_namelen(ce)))
 169
 170 template<class T>
 171 static inline size_t ondisk_ce_size(T *ce)
 172 {
 173         return flexible_size(T,ce_namelen(ce));
 174 }
 175
 176 class CGitIndex
 177 {
 178 public:
 179         CString    m_FileName;
 180         __time64_t      m_ModifyTime;
 181         int                     m_Flags;
 182         //int            m_Status;
 183         CGitHash        m_IndexHash;
 184
 185         int FillData(ondisk_cache_entry* entry);
 186         int FillData(ondisk_cache_entry_extended* entry);
 187         int Print();
 188
 189 };
 190
 191 class CAutoReadLock
 192 {
 193         SharedMutex *m_Lock;
 194 public:
 195         CAutoReadLock(SharedMutex * lock)
 196         {
 197                 m_Lock = lock;
 198                 lock->AcquireShared();
 199         }
 200         ~CAutoReadLock()
 201         {
 202                 m_Lock->ReleaseShared();
 203         }
 204 };
 205
 206 class CAutoWriteLock
 207 {
 208         SharedMutex *m_Lock;
 209 public:
 210         CAutoWriteLock(SharedMutex * lock)
 211         {
 212                 m_Lock = lock;
 213                 lock->AcquireExclusive();
 214         }
 215         ~CAutoWriteLock()
 216         {
 217                 m_Lock->ReleaseExclusive();
 218         }
 219 };
 220
 221 class CGitIndexList:public std::vector<CGitIndex>
 222 {
 223 protected:
 224
 225 public:
 226         __time64_t  m_LastModifyTime;
 227
 228 #ifdef DEBUG
 229         CString m_GitFile;
 230         ~CGitIndexList()
 231         {
 232                 //TRACE(_T("Free Index List 0x%x %s"),this, m_GitFile);
 233         }
 234 #endif
 235
 236         CGitIndexList();
 237
 238         int ReadIndex(CString file);
 239         int GetStatus(const CString &gitdir,const CString &path,git_wc_status_kind * status,BOOL IsFull=false, BOOL IsRecursive=false,FIll_STATUS_CALLBACK callback=NULL,void *pData=NULL,CGitHash *pHash=NULL);
 240 protected:
 241         int GetFileStatus(const CString &gitdir,const CString &path, git_wc_status_kind * status,__int64 time,FIll_STATUS_CALLBACK callback=NULL,void *pData=NULL,CGitHash *pHash=NULL);
 242         int GetDirStatus(const CString &gitdir,const CString &path, git_wc_status_kind * status,__int64 time,FIll_STATUS_CALLBACK callback=NULL,void *pData=NULL,CGitHash *pHash=NULL);
 243 };
 244
 245 typedef std::tr1::shared_ptr<CGitIndexList> SHARED_INDEX_PTR;
 246 typedef CComCritSecLock<CComCriticalSection> CAutoLocker;
 247
 248 class CGitIndexFileMap:public std::map<CString, SHARED_INDEX_PTR>
 249 {
 250 public:
 251         CComCriticalSection                     m_critIndexSec;
 252
 253         CGitIndexFileMap() { m_critIndexSec.Init(); }
 254         ~CGitIndexFileMap() { m_critIndexSec.Term(); }
 255
 256         SHARED_INDEX_PTR SafeGet(const CString &path)
 257         {
 258                 CAutoLocker lock(m_critIndexSec);
 259                 if(this->find(path) == end())
 260                         return SHARED_INDEX_PTR();
 261                 else
 262                         return (*this)[path];
 263         }
 264
 265         void SafeSet(const CString &path, SHARED_INDEX_PTR ptr)
 266         {
 267                 CAutoLocker lock(m_critIndexSec);
 268                 (*this)[path] = ptr;
 269         }
 270
 271         int Check(const CString &gitdir, bool *isChanged);
 272         int LoadIndex(const CString &gitdir);
 273
 274         bool CheckAndUpdate(const CString &gitdir,bool isLoadUpdatedIndex)
 275         {
 276                 bool isChanged=false;
 277                 if(isLoadUpdatedIndex && Check(gitdir,&isChanged))
 278                         return false;
 279
 280                 if(isChanged && isLoadUpdatedIndex)
 281                 {
 282                         LoadIndex(gitdir);
 283                         return true;
 284                 }
 285
 286                 return false;
 287         }
 288         int GetFileStatus(const CString &gitdir,const CString &path,git_wc_status_kind * status,
 289                                                         BOOL IsFull=false, BOOL IsRecursive=false,
 290                                                         FIll_STATUS_CALLBACK callback=NULL,
 291                                                         void *pData=NULL,CGitHash *pHash=NULL,
 292                                                         bool isLoadUpdatedIndex=true);
 293
 294         int IsUnderVersionControl(const CString &gitdir,
 295                                                           const CString &path,
 296                                                           bool isDir,
 297                                                           bool *isVersion,
 298                                                           bool isLoadUpdateIndex=true);
 299 };
 300
 301
 302 class CGitTreeItem
 303 {
 304 public:
 305         CString m_FileName;
 306         CGitHash        m_Hash;
 307         int                     m_Flags;
 308 };
 309
 310 /* After object create, never change field agains
 311  * that needn't lock to get field
 312 */
 313 class CGitHeadFileList:public std::vector<CGitTreeItem>
 314 {
 315 private:
 316
 317         int GetPackRef(const CString &gitdir);
 318
 319 public:
 320         __time64_t  m_LastModifyTimeHead;
 321         __time64_t  m_LastModifyTimeRef;
 322         __time64_t      m_LastModifyTimePackRef;
 323
 324         CString         m_HeadRefFile;
 325         CGitHash        m_Head;
 326         CString         m_HeadFile;
 327         CString         m_Gitdir;
 328         CString         m_PackRefFile;
 329
 330         CGitHash        m_TreeHash; /* buffered tree hash value */
 331
 332         std::map<CString,CGitHash> m_PackRefMap;
 333
 334         CGitHeadFileList()
 335         {
 336                 m_LastModifyTimeHead=0;
 337                 m_LastModifyTimeRef=0;
 338                 m_LastModifyTimePackRef = 0;
 339         }
 340
 341 #ifdef DEBUG
 342         CString m_GitFile;
 343         ~CGitHeadFileList()
 344         {
 345                 //TRACE(_T("Free Index List 0x%x %s"),this, m_GitFile);
 346         }
 347 #endif
 348
 349         int ReadTree();
 350         int ReadHeadHash(CString gitdir);
 351         bool CheckHeadUpdate();
 352         static int CallBack(const unsigned char *, const char *, int, const char *, unsigned int, int, void *);
 353         //int ReadTree();
 354 };
 355
 356 typedef std::tr1::shared_ptr<CGitHeadFileList> SHARED_TREE_PTR;
 357 class CGitHeadFileMap:public std::map<CString,SHARED_TREE_PTR>
 358 {
 359 public:
 360
 361         CComCriticalSection                     m_critTreeSec;
 362
 363         CGitHeadFileMap() { m_critTreeSec.Init(); }
 364         ~CGitHeadFileMap() { m_critTreeSec.Term(); }
 365
 366         SHARED_TREE_PTR SafeGet(const CString &path)
 367         {
 368                 CAutoLocker lock(m_critTreeSec);
 369                 if(this->find(path) == end())
 370                         return SHARED_TREE_PTR();
 371                 else
 372                         return (*this)[path];
 373         }
 374
 375         void SafeSet(const CString &path, SHARED_TREE_PTR ptr)
 376         {
 377                 CAutoLocker lock(m_critTreeSec);
 378                 (*this)[path] = ptr;
 379         }
 380
 381         int GetFileStatus(const CString &gitdir,const CString &path,git_wc_status_kind * status,BOOL IsFull=false, BOOL IsRecursive=false,
 382                                                 FIll_STATUS_CALLBACK callback=NULL,void *pData=NULL,
 383                                                 bool isLoaded=false);
 384         int CheckHeadUpdate(const CString &gitdir);
 385         int GetHeadHash(const CString &gitdir, CGitHash &hash);
 386
 387
 388         bool IsHashChanged(const CString &gitdir)
 389         {
 390                 SHARED_TREE_PTR ptr = SafeGet(gitdir);
 391
 392                 if( ptr.get() == NULL)
 393                         return false;
 394
 395                 return ptr->m_Head != ptr->m_TreeHash;
 396         }
 397
 398 };
 399
 400
 401
 402 class CGitIgnoreItem
 403 {
 404 public:
 405         SharedMutex  m_SharedMutex;
 406
 407         CGitIgnoreItem()
 408         {
 409                 m_LastModifyTime =0;
 410                 m_pExcludeList =NULL;
 411         }
 412         ~CGitIgnoreItem()
 413         {
 414                 if(m_pExcludeList)
 415                         git_free_exclude_list(m_pExcludeList);
 416                 m_pExcludeList=NULL;
 417         }
 418         __time64_t  m_LastModifyTime;
 419         CStringA m_BaseDir;
 420         EXCLUDE_LIST m_pExcludeList;
 421         int FetchIgnoreList(const CString &projectroot, const CString &file);
 422 };
 423
 424 class CGitIgnoreList
 425 {
 426 private:
 427         bool CheckFileChanged(const CString &path);
 428         int      FetchIgnoreFile(const CString &gitdir, const CString &gitignore);
 429
 430         int  CheckIgnore(const CString &path,const CString &root);
 431
 432 public:
 433         SharedMutex             m_SharedMutex;
 434
 435         CGitIgnoreList(){ m_SharedMutex.Init(); }
 436         ~CGitIgnoreList() { m_SharedMutex.Release(); }
 437
 438         std::map<CString, CGitIgnoreItem> m_Map;
 439
 440         int      GetIgnoreFileChangeTimeList(const CString &dir, std::vector<__int64> &timelist);
 441         bool CheckIgnoreChanged(const CString &gitdir,const CString &path);
 442         int  LoadAllIgnoreFile(const CString &gitdir,const CString &path);
 443         bool IsIgnore(const CString &path,const CString &root);
 444 };
 445
 446 template<class T>
 447 int GetRangeInSortVector(T &vector,LPTSTR pstr,int len, int *start, int *end, int pos)
 448 {
 449         if( pos < 0)
 450         {
 451                 return -1;
 452         }
 453         if(start == 0 || end == NULL)
 454                 return -1;
 455
 456         *start=*end=-1;
 457         if( _tcsnccmp(vector[pos].m_FileName, pstr,len) != 0)
 458         {
 459                 for(int i=0;i< vector.size();i++)
 460                 {
 461                         if( _tcsnccmp(vector[i].m_FileName, pstr,len) == 0 )
 462                         {
 463                                 if(*start<0)
 464                                         *start =i;
 465                                 *end =i;
 466                         }
 467                 }
 468                 return -1;
 469         }else
 470         {
 471                 *start =0;
 472                 *end = vector.size();
 473
 474                 for(int i=pos;i<vector.size();i++)
 475                 {
 476                         if( _tcsnccmp(vector[i].m_FileName, pstr,len) == 0 )
 477                         {
 478                                 *end=i;
 479                         }else
 480                         {
 481                                 break;
 482                         }
 483                 }
 484                 for(int i=pos;i>=0;i--)
 485                 {
 486                         if( _tcsnccmp(vector[i].m_FileName, pstr,len) == 0 )
 487                         {
 488                                 *start=i;
 489                         }else
 490                         {
 491                                 break;
 492                         }
 493                 }
 494         }
 495         return 0;
 496 }
 497
 498 template<class T>
 499 int SearchInSortVector(T &vector, LPTSTR pstr, int len)
 500 {
 501         int end=vector.size()-1;
 502         int start = 0;
 503         int mid = (start+end)/2;
 504
 505         if(vector.size() == 0)
 506                 return -1;
 507
 508         while(!( start == end && start==mid))
 509         {
 510                 int cmp;
 511                 if(len < 0)
 512                         cmp = _tcscmp(vector[mid].m_FileName,pstr);
 513                 else
 514                         cmp = _tcsnccmp( vector[mid].m_FileName,pstr,len );
 515
 516                 if(cmp ==0)
 517                         return mid;
 518
 519                 if(cmp < 0)
 520                 {
 521                         start = mid+1;
 522                 }
 523
 524                 if(cmp > 0)
 525                 {
 526                         end=mid;
 527                 }
 528                 mid=(start +end ) /2;
 529
 530         }
 531         if(len <0)
 532         {
 533                 if(_tcscmp(vector[mid].m_FileName,pstr) == 0)
 534                         return mid;
 535         }
 536         else
 537         {
 538                 if(_tcsnccmp( vector[mid].m_FileName,pstr,len ) == 0)
 539                         return mid;
 540         }
 541         return -1;
 542 };
 543 #if 0
 544
 545 class CGitStatus
 546 {
 547 protected:
 548         int GetFileStatus(const CString &gitdir,const CString &path,git_wc_status_kind * status,BOOL IsFull=false, BOOL IsRecursive=false,FIll_STATUS_CALLBACK callback=NULL,void *pData=NULL);
 549 public:
 550         CGitIgnoreList m_IgnoreList;
 551         CGitHeadFileMap m_HeadFilesMap;
 552         CGitIndexFileMap m_IndexFilesMap;
 553
 554         int GetStatus(const CString &gitdir,const CString &path,git_wc_status_kind * status,BOOL IsFull=false, BOOL IsRecursive=false,FIll_STATUS_CALLBACK callback=NULL,void *pData=NULL);
 555 };
 556
 557 #endif