// -*- 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 <apt-pkg/debfile.h> #include <db.h> #include <errno.h> #include <string> #include <string.h> #include <stdint.h> #include <stdio.h> #include "contents.h" class FileFd; class CacheDB { protected: // Database state/access DBT Key; DBT Data; char TmpKey[600]; DB *Dbp; bool DBLoaded; bool ReadOnly; std::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 const &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 const &doStat = false); bool GetCurStat(); bool LoadControl(); bool LoadContents(bool const &GenOnly); bool GetMD5(bool const &GenOnly); bool GetSHA1(bool const &GenOnly); bool GetSHA256(bool const &GenOnly); bool GetSHA512(bool const &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), FlSHA512=(1<<6)}; struct StatStore { uint32_t Flags; uint32_t mtime; uint64_t FileSize; uint8_t MD5[16]; uint8_t SHA1[20]; uint8_t SHA256[32]; uint8_t SHA512[64]; } CurStat; struct StatStore OldStat; // 'set' state std::string FileName; FileFd *Fd; debDebFile *DebFile; public: // Data collection helpers debDebFile::MemControlExtract Control; ContentsExtract Contents; std::string MD5Res; std::string SHA1Res; std::string SHA256Res; std::string SHA512Res; // Runtime statistics struct Stats { double Bytes; double MD5Bytes; double SHA1Bytes; double SHA256Bytes; double SHA512Bytes; unsigned long Packages; unsigned long Misses; unsigned long long DeLinkBytes; inline void Add(const Stats &S) { Bytes += S.Bytes; MD5Bytes += S.MD5Bytes; SHA1Bytes += S.SHA1Bytes; SHA256Bytes += S.SHA256Bytes; SHA512Bytes += S.SHA512Bytes; Packages += S.Packages; Misses += S.Misses; DeLinkBytes += S.DeLinkBytes; }; Stats() : Bytes(0), MD5Bytes(0), SHA1Bytes(0), SHA256Bytes(0), SHA512Bytes(0),Packages(0), Misses(0), DeLinkBytes(0) {}; } Stats; bool ReadyDB(std::string const &DB); inline bool DBFailed() {return Dbp != 0 && DBLoaded == false;}; inline bool Loaded() {return DBLoaded == true;}; inline unsigned long long GetFileSize(void) {return CurStat.FileSize;} bool SetFile(std::string const &FileName,struct stat St,FileFd *Fd); bool GetFileInfo(std::string const &FileName, bool const &DoControl, bool const &DoContents, bool const &GenContentsOnly, bool const &DoMD5, bool const &DoSHA1, bool const &DoSHA256, bool const &DoSHA512, 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;}; }; #endif