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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: depcache.h,v 1.3 1998/07/12 23:58:25 jgg Exp $
/* ######################################################################
DepCache - Dependency Extension data for the cache
This class stores the cache data and a set of extension structures for
monitoring the current state of all the packages. It also generates and
caches the 'install' state of many things. This refers to the state of the
package after an install has been run.
The StateCache::State field can be -1,0,1,2 which is <,=,>,no current.
StateCache::Mode is which of the 3 fields is active.
This structure is important to support the readonly status of the cache
file. When the data is saved the cache will be refereshed from our
internal rep and written to disk. Then the actual persistant data
files will be put on the disk.
Each dependency is compared against 3 target versions to produce to
3 dependency results.
Now - Compared using the Currently install version
Install - Compared using the install version (final state)
CVer - (Candidate Verion) Compared using the Candidate Version
The candidate and now results are used to decide wheather a package
should be automatically installed or if it should be left alone.
Remember, the Candidate Version is selected based on the distribution
settings for the Package. The Install Version is selected based on the
state (Delete, Keep, Install) field and can be either the Current Version
or the Candidate version.
The Candidate version is what is shown the 'Install Version' field.
##################################################################### */
/*}}}*/
// Header section: pkglib
#ifndef PKGLIB_DEPCACHE_H
#define PKGLIB_DEPCACHE_H
#ifdef __GNUG__
#pragma interface "apt-pkg/depcache.h"
#endif
#include <apt-pkg/pkgcache.h>
class pkgDepCache : public pkgCache
{
public:
// These flags are used in DepState
enum DepFlags {DepNow = (1 << 0),DepInstall = (1 << 1),DepCVer = (1 << 2),
DepGNow = (1 << 3),DepGInstall = (1 << 4),DepGCVer = (1 << 5)};
// These flags are used in StateCache::DepState
enum DepStateFlags {DepNowPolicy = (1 << 0), DepNowMin = (1 << 1),
DepInstPolicy = (1 << 2), DepInstMin = (1 << 3),
DepCandPolicy = (1 << 4), DepCandMin = (1 << 5)};
// These flags are used in StateCache::iFlags
enum InternalFlags {AutoKept = (1 << 0)};
enum VersionTypes {NowVersion, InstallVersion, CandidateVersion};
enum ModeList {ModeDelete = 0, ModeKeep = 1, ModeInstall = 2};
struct StateCache
{
// Epoch stripped text versions of the two version fields
const char *CandVersion;
const char *CurVersion;
// Pointer to the candidate install version.
Version *CandidateVer;
// Pointer to the install version.
Version *InstallVer;
// Various tree indicators
signed char Status; // -1,0,1,2
unsigned char Mode; // ModeList
unsigned char DepState; // DepState Flags
// Copy of Package::Flags
unsigned short Flags;
unsigned short iFlags; // Internal flags
// Update of candidate version
const char *StripEpoch(const char *Ver);
void Update(PkgIterator Pkg,pkgCache &Cache);
// Various test members for the current status of the package
inline bool NewInstall() const {return Status == 2 && Mode == ModeInstall;};
inline bool Delete() const {return Mode == ModeDelete;};
inline bool Keep() const {return Mode == ModeKeep;};
inline bool Upgrade() const {return Status > 0 && Mode == ModeInstall;};
inline bool Upgradable() const {return Status == 1;};
inline bool Downgrade() const {return Status < 0;};
inline bool Held() const {return Status != 0 && Keep();};
inline bool NowBroken() const {return (DepState & DepNowMin) != DepNowMin;};
inline bool InstBroken() const {return (DepState & DepInstMin) != DepInstMin;};
inline bool Install() const {return Mode == ModeInstall;};
inline VerIterator InstVerIter(pkgCache &Cache)
{return VerIterator(Cache,InstallVer);};
inline VerIterator CandidateVerIter(pkgCache &Cache)
{return VerIterator(Cache,CandidateVer);};
};
// Helper functions
void BuildGroupOrs(VerIterator const &V);
void UpdateVerState(PkgIterator Pkg);
bool Init();
protected:
// State information
StateCache *PkgState;
unsigned char *DepState;
long iUsrSize;
long iDownloadSize;
long iInstCount;
long iDelCount;
long iKeepCount;
long iBrokenCount;
long iBadCount;
// Check for a matching provides
bool CheckDep(DepIterator Dep,int Type,PkgIterator &Res);
inline bool CheckDep(DepIterator Dep,int Type)
{
PkgIterator Res(*this);
return CheckDep(Dep,Type,Res);
}
// Computes state information for deps and versions (w/o storing)
unsigned char DependencyState(DepIterator &D);
unsigned char VersionState(DepIterator D,unsigned char Check,
unsigned char SetMin,
unsigned char SetPolicy);
// Recalculates various portions of the cache, call after changing something
void Update(DepIterator Dep); // Mostly internal
void Update(PkgIterator const &P);
// Count manipulators
void AddSizes(const PkgIterator &Pkg,long Mult = 1);
inline void RemoveSizes(const PkgIterator &Pkg) {AddSizes(Pkg,-1);};
void AddStates(const PkgIterator &Pkg,int Add = 1);
inline void RemoveStates(const PkgIterator &Pkg) {AddStates(Pkg,-1);};
public:
// Policy implementation
virtual VerIterator GetCandidateVer(PkgIterator Pkg);
virtual bool IsImportantDep(DepIterator Dep);
// Accessors
inline StateCache &operator [](PkgIterator const &I) {return PkgState[I->ID];};
inline unsigned char &operator [](DepIterator const &I) {return DepState[I->ID];};
// Manipulators
void MarkKeep(PkgIterator const &Pkg,bool Soft = false);
void MarkDelete(PkgIterator const &Pkg);
void MarkInstall(PkgIterator const &Pkg,bool AutoInst = true);
// This is for debuging
void Update();
// Hook to keep the extra data in sync
virtual bool ReMap();
// Size queries
inline long UsrSize() {return iUsrSize;};
inline long DebSize() {return iDownloadSize;};
inline long DelCount() {return iDelCount;};
inline long KeepCount() {return iKeepCount;};
inline long InstCount() {return iInstCount;};
inline long BrokenCount() {return iBrokenCount;};
inline long BadCount() {return iBadCount;};
pkgDepCache(MMap &Map);
virtual ~pkgDepCache();
};
#endif
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