// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: cachedb.h,v 1.4 2004/05/08 19:41:01 mdz Exp $ /* ###################################################################### CacheDB Simple uniform interface to a cache database. ##################################################################### */ /*}}}*/ #ifndef CACHEDB_H #define CACHEDB_H #include <db.h> #include <string> #include <apt-pkg/debfile.h> #include <inttypes.h> #include <sys/stat.h> #include <errno.h> #include "contents.h" class CacheDB { protected: // Database state/access DBT Key; DBT Data; char TmpKey[600]; DB *Dbp; bool DBLoaded; bool ReadOnly; string DBFile; // Generate a key for the DB of a given type inline void InitQuery(const char *Type) { memset(&Key,0,sizeof(Key)); memset(&Data,0,sizeof(Data)); Key.data = TmpKey; Key.size = snprintf(TmpKey,sizeof(TmpKey),"%s:%s",FileName.c_str(), Type); } inline bool Get() { return Dbp->get(Dbp,0,&Key,&Data,0) == 0; }; inline bool Put(const void *In,unsigned long Length) { if (ReadOnly == true) return true; Data.size = Length; Data.data = (void *)In; if (DBLoaded == true && (errno = Dbp->put(Dbp,0,&Key,&Data,0)) != 0) { DBLoaded = false; return false; } return true; } bool OpenFile(); bool GetFileStat(); bool GetCurStat(); bool LoadControl(); bool LoadContents(bool GenOnly); bool GetMD5(bool GenOnly); bool GetSHA1(bool GenOnly); bool GetSHA256(bool GenOnly); // 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)}; struct StatStore { uint32_t Flags; uint32_t mtime; uint32_t FileSize; uint8_t MD5[16]; uint8_t SHA1[20]; uint8_t SHA256[32]; } CurStat; struct StatStore OldStat; // 'set' state string FileName; FileFd *Fd; debDebFile *DebFile; public: // Data collection helpers debDebFile::MemControlExtract Control; ContentsExtract Contents; string MD5Res; string SHA1Res; string SHA256Res; // Runtime statistics struct Stats { double Bytes; double MD5Bytes; double SHA1Bytes; double SHA256Bytes; unsigned long Packages; unsigned long Misses; unsigned long DeLinkBytes; inline void Add(const Stats &S) { Bytes += S.Bytes; MD5Bytes += S.MD5Bytes; SHA1Bytes += S.SHA1Bytes; SHA256Bytes += S.SHA256Bytes; Packages += S.Packages; Misses += S.Misses; DeLinkBytes += S.DeLinkBytes;}; Stats() : Bytes(0), MD5Bytes(0), SHA1Bytes(0), SHA256Bytes(0), Packages(0), Misses(0), DeLinkBytes(0) {}; } Stats; bool ReadyDB(string DB); inline bool DBFailed() {return Dbp != 0 && DBLoaded == false;}; inline bool Loaded() {return DBLoaded == true;}; inline off_t GetFileSize(void) {return CurStat.FileSize;} bool SetFile(string FileName,struct stat St,FileFd *Fd); bool GetFileInfo(string FileName, bool DoControl, bool DoContents, bool GenContentsOnly, bool DoMD5, bool DoSHA1, bool DoSHA256); bool Finish(); bool Clean(); CacheDB(string DB) : Dbp(0), Fd(NULL), DebFile(0) {ReadyDB(DB);}; ~CacheDB() {ReadyDB(string()); delete DebFile;}; }; #endif