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-rw-r--r--ftparchive/cachedb.h30
1 files changed, 24 insertions, 6 deletions
diff --git a/ftparchive/cachedb.h b/ftparchive/cachedb.h
index 14dba5578..613963f6f 100644
--- a/ftparchive/cachedb.h
+++ b/ftparchive/cachedb.h
@@ -86,8 +86,12 @@ 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();
@@ -95,10 +99,24 @@ class CacheDB
// 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;
@@ -150,7 +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;};
@@ -171,8 +189,8 @@ class CacheDB
bool Clean();
- CacheDB(std::string const &DB) : Dbp(0), Fd(NULL), DebFile(0) {TmpKey[0]='\0'; ReadyDB(DB);};
- ~CacheDB() {ReadyDB(std::string()); delete DebFile;};
+ CacheDB(std::string const &DB);
+ ~CacheDB();
};
#endif