FildFd: Introduce a Flush() function and call it from Close()

[apt.git] / ftparchive / cachedb.h

diff --git a/ftparchive/cachedb.h b/ftparchive/cachedb.h
index 54a27494487e8f8641376bcebe854b72a572bc6d..417c25a9fb22764eb8e44381f19517aaa01927ee 100644 (file)
--- a/ftparchive/cachedb.h
+++ b/ftparchive/cachedb.h
@@ -12,6 +12,7 @@
 #ifndef CACHEDB_H
 #define CACHEDB_H
 
+#include <apt-pkg/hashes.h>
 #include <apt-pkg/debfile.h>
 
 #include <db.h>
@@ -85,22 +86,37 @@ class CacheDB
    bool OpenDebFile();
    void CloseDebFile();
 
-   bool GetFileStat(bool const &doStat = false);
+   // GetCurStat needs some compat code, see lp #1274466)
+   bool GetCurStatCompatOldFormat();
+   bool GetCurStatCompatNewFormat();
    bool GetCurStat();
+
+   bool GetFileStat(bool const &doStat = false);
    bool LoadControl();
    bool LoadContents(bool const &GenOnly);
    bool LoadSource();
-   bool GetMD5(bool const &GenOnly);
-   bool GetSHA1(bool const &GenOnly);
-   bool GetSHA256(bool const &GenOnly);
-   bool GetSHA512(bool const &GenOnly);
-   
+   bool GetHashes(bool const GenOnly, unsigned int const DoHashes);
+
    // Stat info stored in the DB, Fixed types since it is written to disk.
    enum FlagList {FlControl = (1<<0),FlMD5=(1<<1),FlContents=(1<<2),
-                  FlSize=(1<<3), FlSHA1=(1<<4), FlSHA256=(1<<5), 
-                  FlSHA512=(1<<6), FlSource=(1<<7),
+                  FlSize=(1<<3), FlSHA1=(1<<4), FlSHA256=(1<<5),
+                  FlSHA512=(1<<6), FlSource=(1<<7)
    };
 
+   // the on-disk format changed (FileSize increased to 64bit) in 
+   // commit 650faab0 which will lead to corruption with old caches
+   struct StatStoreOldFormat
+   {
+      uint32_t Flags;
+      uint32_t mtime;
+      uint32_t FileSize;
+      uint8_t  MD5[16];
+      uint8_t  SHA1[20];
+      uint8_t  SHA256[32];
+   } CurStatOldFormat;
+
+   // WARNING: this struct is read/written to the DB so do not change the
+   //          layout of the fields (see lp #1274466), only append to it
    struct StatStore
    {
       uint32_t Flags;
@@ -124,12 +140,8 @@ class CacheDB
    debDebFile::MemControlExtract Control;
    ContentsExtract Contents;
    DscExtract Dsc;
+   HashStringList HashesList;
 
-   std::string MD5Res;
-   std::string SHA1Res;
-   std::string SHA256Res;
-   std::string SHA512Res;
-   
    // Runtime statistics
    struct Stats
    {
@@ -156,7 +168,7 @@ class CacheDB
                SHA512Bytes(0),Packages(0), Misses(0), DeLinkBytes(0) {};
    } Stats;
    
-   bool ReadyDB(std::string const &DB);
+   bool ReadyDB(std::string const &DB = "");
    inline bool DBFailed() {return Dbp != 0 && DBLoaded == false;};
    inline bool Loaded() {return DBLoaded == true;};
    
@@ -165,23 +177,20 @@ class CacheDB
    bool SetFile(std::string const &FileName,struct stat St,FileFd *Fd);
 
    // terrible old overloaded interface
-   bool GetFileInfo(std::string const &FileName, 
-                    bool const &DoControl, 
-                    bool const &DoContents, 
-                    bool const &GenContentsOnly, 
-                    bool const &DoSource,
-                   bool const &DoMD5, 
-                    bool const &DoSHA1, 
-                    bool const &DoSHA256, 
-                    bool const &DoSHA512, 
-                    bool const &checkMtime = false);
+   bool GetFileInfo(std::string const &FileName,
+        bool const &DoControl,
+        bool const &DoContents,
+        bool const &GenContentsOnly,
+        bool const DoSource,
+        unsigned int const DoHashes,
+        bool const &checkMtime = false);
 
    bool Finish();   
    
    bool Clean();
    
-   CacheDB(std::string const &DB) : Dbp(0), Fd(NULL), DebFile(0) {TmpKey[0]='\0'; ReadyDB(DB);};
-   ~CacheDB() {ReadyDB(std::string()); delete DebFile;};
+   explicit CacheDB(std::string const &DB);
+   ~CacheDB();
 };
     
 #endif