home *** CD-ROM | disk | FTP | other *** search
- // -*- mode: cpp; mode: fold -*-
- // Description /*{{{*/
- // $Id: algorithms.h,v 1.6 1998/10/20 02:39:18 jgg Exp $
- /* ######################################################################
-
- Algorithms - A set of misc algorithms
-
- This simulate class displays what the ordering code has done and
- analyses it with a fresh new dependency cache. In this way we can
- see all of the effects of an upgrade run.
-
- pkgDistUpgrade computes an upgrade that causes as many packages as
- possible to move to the newest verison.
-
- pkgApplyStatus sets the target state based on the content of the status
- field in the status file. It is important to get proper crash recovery.
-
- pkgFixBroken corrects a broken system so that it is in a sane state.
-
- pkgAllUpgrade attempts to upgade as many packages as possible but
- without installing new packages.
-
- The problem resolver class contains a number of complex algorithms
- to try to best-guess an upgrade state. It solves the problem of
- maximizing the number of install state packages while having no broken
- packages.
-
- ##################################################################### */
- /*}}}*/
- // Header section: pkglib
- #ifndef PKGLIB_ALGORITHMS_H
- #define PKGLIB_ALGORITHMS_H
-
- #ifdef __GNUG__
- #pragma interface "apt-pkg/algorithms.h"
- #endif
-
- #include <apt-pkg/packagemanager.h>
- #include <apt-pkg/depcache.h>
-
- class pkgSimulate : public pkgPackageManager
- {
- protected:
-
- unsigned char *Flags;
-
- pkgDepCache Sim;
-
- // The Actuall installation implementation
- virtual bool Install(PkgIterator Pkg,string File);
- virtual bool Configure(PkgIterator Pkg);
- virtual bool Remove(PkgIterator Pkg);
- void ShortBreaks();
-
- public:
-
- pkgSimulate(pkgDepCache &Cache);
- };
-
- class pkgProblemResolver
- {
- pkgDepCache &Cache;
- typedef pkgCache::PkgIterator PkgIterator;
- typedef pkgCache::VerIterator VerIterator;
- typedef pkgCache::DepIterator DepIterator;
- typedef pkgCache::PrvIterator PrvIterator;
- typedef pkgCache::Version Version;
- typedef pkgCache::Package Package;
-
- enum Flags {Protected = (1 << 0), PreInstalled = (1 << 1),
- Upgradable = (1 << 2), ReInstateTried = (1 << 3),
- ToRemove = (1 << 4)};
- signed short *Scores;
- unsigned char *Flags;
- bool Debug;
-
- // Sort stuff
- static pkgProblemResolver *This;
- static int ScoreSort(const void *a,const void *b);
-
- struct PackageKill
- {
- PkgIterator Pkg;
- DepIterator Dep;
- };
-
- void MakeScores();
- bool DoUpgrade(pkgCache::PkgIterator Pkg);
-
- public:
-
- inline void Protect(pkgCache::PkgIterator Pkg) {Flags[Pkg->ID] |= Protected;};
- inline void Remove(pkgCache::PkgIterator Pkg) {Flags[Pkg->ID] |= ToRemove;};
-
- // Try to intelligently resolve problems by installing and removing packages
- bool Resolve(bool BrokenFix = false);
-
- // Try to resolve problems only by using keep
- bool ResolveByKeep();
-
- void InstallProtect();
-
- pkgProblemResolver(pkgDepCache &Cache);
- };
-
- bool pkgDistUpgrade(pkgDepCache &Cache);
- bool pkgApplyStatus(pkgDepCache &Cache);
- bool pkgFixBroken(pkgDepCache &Cache);
- bool pkgAllUpgrade(pkgDepCache &Cache);
- bool pkgMinimizeUpgrade(pkgDepCache &Cache);
-
- #endif
-