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         std::map<CString,int> m_Map;
 227         __time64_t  m_LastModifyTime;
 228
 229         SharedMutex  m_SharedMutex;
 230
 231         CGitIndexList();
 232         int ReadIndex(CString file);
 233         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);
 234 protected:
 235         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);
 236         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);
 237 };
 238
 239 class CGitTreeItem
 240 {
 241 public:
 242         CString m_FileName;
 243         CGitHash        m_Hash;
 244         int                     m_Flags;
 245 };
 246
 247 class CGitHeadFileList:public std::vector<CGitTreeItem>
 248 {
 249 private:
 250
 251         int GetPackRef(const CString &gitdir);
 252
 253 public:
 254         std::map<CString,int> m_Map;
 255         __time64_t  m_LastModifyTimeHead;
 256         __time64_t  m_LastModifyTimeRef;
 257         __time64_t      m_LastModifyTimePackRef;
 258
 259         CString         m_HeadRefFile;
 260         CGitHash        m_Head;
 261         CString         m_HeadFile;
 262         CString         m_Gitdir;
 263         CString         m_PackRefFile;
 264
 265         SharedMutex     m_SharedMutex;
 266
 267         std::map<CString,CGitHash> m_PackRefMap;
 268
 269         CGitHash        m_TreeHash; /* buffered tree hash value */
 270
 271         CGitHeadFileList()
 272         {
 273                 m_LastModifyTimeHead=0;
 274                 m_LastModifyTimeRef=0;
 275                 m_LastModifyTimePackRef = 0;
 276         }
 277
 278         int ReadHeadHash(CString gitdir);
 279         bool CheckHeadUpdate();
 280
 281         static int CallBack(const unsigned char *, const char *, int, const char *, unsigned int, int, void *);
 282         int ReadTree();
 283 };
 284
 285 class CGitHeadFileMap:public std::map<CString,CGitHeadFileList>
 286 {
 287 public:
 288
 289         SharedMutex  m_SharedMutex;
 290
 291         CGitHeadFileMap(){ m_SharedMutex.Init(); }
 292         ~CGitHeadFileMap() { m_SharedMutex.Release(); }
 293
 294         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);
 295         int CheckHeadUpdate(const CString &gitdir);
 296         int GetHeadHash(const CString &gitdir, CGitHash &hash);
 297
 298         bool IsHashChanged(const CString &gitdir)
 299         {
 300                 CAutoReadLock lock(&m_SharedMutex);
 301                 if( find(gitdir) == end())
 302                         return false;
 303
 304                 CAutoReadLock lock1(&(*this).m_SharedMutex);
 305                 return (*this)[gitdir].m_Head != (*this)[gitdir].m_TreeHash;
 306         }
 307 };
 308
 309
 310 class CGitIndexFileMap:public std::map<CString,CGitIndexList>
 311 {
 312 public:
 313         SharedMutex  m_SharedMutex;
 314
 315         CGitIndexFileMap(){ m_SharedMutex.Init(); }
 316         ~CGitIndexFileMap() { m_SharedMutex.Release(); }
 317
 318         int CheckAndUpdateIndex(const CString &gitdir,bool *loaded=NULL);
 319
 320         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,CGitHash *pHash=NULL);
 321
 322         int IsUnderVersionControl(const CString &gitdir, const CString &path, bool isDir,bool *isVersion);
 323 };
 324
 325 class CGitIgnoreItem
 326 {
 327 public:
 328         SharedMutex  m_SharedMutex;
 329
 330         CGitIgnoreItem()
 331         {
 332                 m_LastModifyTime =0;
 333                 m_pExcludeList =NULL;
 334         }
 335         ~CGitIgnoreItem()
 336         {
 337                 if(m_pExcludeList)
 338                         git_free_exclude_list(m_pExcludeList);
 339                 m_pExcludeList=NULL;
 340         }
 341         __time64_t  m_LastModifyTime;
 342         CStringA m_BaseDir;
 343         EXCLUDE_LIST m_pExcludeList;
 344         int FetchIgnoreList(const CString &projectroot, const CString &file);
 345 };
 346
 347 class CGitIgnoreList
 348 {
 349 private:
 350         bool CheckFileChanged(const CString &path);
 351         int      FetchIgnoreFile(const CString &gitdir, const CString &gitignore);
 352
 353         int  CheckIgnore(const CString &path,const CString &root);
 354
 355 public:
 356         SharedMutex             m_SharedMutex;
 357
 358         CGitIgnoreList(){ m_SharedMutex.Init(); }
 359         ~CGitIgnoreList() { m_SharedMutex.Release(); }
 360
 361         std::map<CString, CGitIgnoreItem> m_Map;
 362
 363         int      GetIgnoreFileChangeTimeList(const CString &dir, std::vector<__int64> &timelist);
 364         bool CheckIgnoreChanged(const CString &gitdir,const CString &path);
 365         int  LoadAllIgnoreFile(const CString &gitdir,const CString &path);
 366         bool IsIgnore(const CString &path,const CString &root);
 367 };
 368
 369 template<class T>
 370 int GetRangeInSortVector(T &vector,LPTSTR pstr,int len, int *start, int *end, int pos)
 371 {
 372         if( pos < 0)
 373         {
 374                 return -1;
 375         }
 376         if(start == 0 || end == NULL)
 377                 return -1;
 378
 379         *start=*end=-1;
 380         if( _tcsnccmp(vector[pos].m_FileName, pstr,len) != 0)
 381         {
 382                 for(int i=0;i< vector.size();i++)
 383                 {
 384                         if( _tcsnccmp(vector[i].m_FileName, pstr,len) == 0 )
 385                         {
 386                                 if(*start<0)
 387                                         *start =i;
 388                                 *end =i;
 389                         }
 390                 }
 391                 return -1;
 392         }else
 393         {
 394                 *start =0;
 395                 *end = vector.size();
 396
 397                 for(int i=pos;i<vector.size();i++)
 398                 {
 399                         if( _tcsnccmp(vector[i].m_FileName, pstr,len) == 0 )
 400                         {
 401                                 *end=i;
 402                         }else
 403                         {
 404                                 break;
 405                         }
 406                 }
 407                 for(int i=pos;i>=0;i--)
 408                 {
 409                         if( _tcsnccmp(vector[i].m_FileName, pstr,len) == 0 )
 410                         {
 411                                 *start=i;
 412                         }else
 413                         {
 414                                 break;
 415                         }
 416                 }
 417         }
 418         return 0;
 419 }
 420
 421 template<class T>
 422 int SearchInSortVector(T &vector, LPTSTR pstr, int len)
 423 {
 424         int end=vector.size()-1;
 425         int start = 0;
 426         int mid = (start+end)/2;
 427
 428         if(vector.size() == 0)
 429                 return -1;
 430
 431         while(!( start == end && start==mid))
 432         {
 433                 int cmp;
 434                 cmp = _tcsnccmp( vector[mid].m_FileName,pstr,len );
 435
 436                 if(cmp ==0)
 437                         return mid;
 438
 439                 if(cmp < 0)
 440                 {
 441                         start = mid+1;
 442                 }
 443
 444                 if(cmp > 0)
 445                 {
 446                         end=mid;
 447                 }
 448                 mid=(start +end ) /2;
 449
 450         }
 451
 452         if(_tcsnccmp( vector[mid].m_FileName,pstr,len ) == 0)
 453                 return mid;
 454
 455         return -1;
 456 };
 457 #if 0
 458
 459 class CGitStatus
 460 {
 461 protected:
 462         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);
 463 public:
 464         CGitIgnoreList m_IgnoreList;
 465         CGitHeadFileMap m_HeadFilesMap;
 466         CGitIndexFileMap m_IndexFilesMap;
 467
 468         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);
 469 };
 470
 471 #endif