src/TortoiseProc/gitlogcache.h

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2013, 2015-2016 - 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 #pragma once
  20
  21 #include "Git.h"
  22 #include "TGitPath.h"
  23 #include "GitRevLoglist.h"
  24 #include "GitHash.h"
  25
  26 #define LOG_INDEX_MAGIC         0x88AA5566
  27 #define LOG_DATA_MAGIC          0x99BB0FFF
  28 #define LOG_DATA_ITEM_MAGIC 0x0FCC9ACC
  29 #define LOG_DATA_FILE_MAGIC 0x19EE9DFF
  30 #define LOG_INDEX_VERSION   0xF
  31
  32 #pragma pack (1)
  33 struct SLogCacheIndexHeader
  34 {
  35         DWORD m_Magic;
  36         DWORD m_Version;
  37         DWORD m_ItemCount;
  38 };
  39
  40 struct SLogCacheIndexItem
  41 {
  42         CGitHash  m_Hash;
  43         ULONGLONG m_Offset;
  44 };
  45
  46 struct SLogCacheIndexFile
  47 {
  48         struct SLogCacheIndexHeader m_Header;
  49         struct SLogCacheIndexItem       m_Item[1]; //dynmatic size
  50 };
  51
  52 struct SLogCacheRevFileHeader
  53 {
  54         DWORD m_Magic;
  55         DWORD m_Version;
  56         DWORD m_Action;
  57         DWORD m_Stage;
  58         DWORD m_ParentNo;
  59         DWORD m_Add;
  60         DWORD m_Del;
  61         DWORD m_FileNameSize;
  62         DWORD m_OldFileNameSize;
  63         TCHAR m_FileName[1];
  64 };
  65 # pragma pack ()
  66
  67 struct SLogCacheRevItemHeader
  68 {
  69         DWORD m_Magic;
  70         DWORD m_Version;
  71         DWORD m_FileCount;
  72 };
  73
  74 struct SLogCacheDataFileHeader
  75 {
  76         DWORD m_Magic;
  77         DWORD m_Version;
  78 };
  79
  80 class CGitHashMap : public std::map<CGitHash, GitRevLoglist>
  81 {
  82 public:
  83         bool IsExist(CGitHash &hash)
  84         {
  85                 return find(hash) != end();
  86         }
  87 };
  88
  89 #define INDEX_FILE_NAME _T("tortoisegit.index")
  90 #define DATA_FILE_NAME _T("tortoisegit.data")
  91
  92 class CLogCache
  93 {
  94 public:
  95
  96 protected:
  97         BOOL m_bEnabled;
  98
  99         HANDLE m_IndexFile;
 100         HANDLE m_IndexFileMap;
 101         SLogCacheIndexFile *m_pCacheIndex;
 102
 103
 104
 105         HANDLE m_DataFile;
 106         HANDLE m_DataFileMap;
 107         BYTE  *m_pCacheData;
 108         DWORD m_DataFileLength;
 109
 110         void CloseDataHandles();
 111         void CloseIndexHandles();
 112         void Sort();
 113
 114         BOOL CheckHeader(SLogCacheIndexHeader *header)
 115         {
 116                 if (header->m_Magic != LOG_INDEX_MAGIC)
 117                         return FALSE;
 118
 119                 if (header->m_Version != LOG_INDEX_VERSION)
 120                         return FALSE;
 121
 122                 return TRUE;
 123         }
 124
 125         BOOL CheckHeader(SLogCacheRevFileHeader *header)
 126         {
 127                 if (header->m_Magic != LOG_DATA_FILE_MAGIC)
 128                         return FALSE;
 129
 130                 if (header->m_Version != LOG_INDEX_VERSION)
 131                         return FALSE;
 132
 133                 return TRUE;
 134         }
 135
 136         BOOL CheckHeader(SLogCacheRevItemHeader *header)
 137         {
 138                 if (header->m_Magic != LOG_DATA_ITEM_MAGIC)
 139                         return FALSE;
 140
 141                 if (header->m_Version != LOG_INDEX_VERSION)
 142                         return FALSE;
 143
 144                 return TRUE;
 145         }
 146
 147         BOOL CheckHeader(SLogCacheDataFileHeader *header)
 148         {
 149                 if (header->m_Magic != LOG_DATA_MAGIC)
 150                         return FALSE;
 151
 152                 if (header->m_Version != LOG_INDEX_VERSION)
 153                         return FALSE;
 154
 155                 return TRUE;
 156         }
 157
 158         int SaveOneItem(const GitRevLoglist& Rev, LONG offset);
 159
 160         CString m_GitDir;
 161         int RebuildCacheFile();
 162
 163 public:
 164         CLogCache();
 165         ~CLogCache();
 166         int FetchCacheIndex(CString GitDir);
 167         int LoadOneItem(GitRevLoglist& Rev, ULONGLONG offset);
 168         ULONGLONG GetOffset(const CGitHash& hash, SLogCacheIndexFile* pData = nullptr);
 169
 170         CGitHashMap m_HashMap;
 171
 172         GitRevLoglist* GetCacheData(const CGitHash& hash);
 173         int SaveCache();
 174
 175         int ClearAllParent();
 176         void ClearAllLanes();
 177 };