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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: algorithms.h,v 1.10 2001/05/22 04:17:41 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.
##################################################################### */
/*}}}*/
#ifndef PKGLIB_ALGORITHMS_H
#define PKGLIB_ALGORITHMS_H
#include <apt-pkg/packagemanager.h>
#include <apt-pkg/depcache.h>
#include <iostream>
#include <apt-pkg/macros.h>
#ifndef APT_8_CLEANER_HEADERS
#include <apt-pkg/acquire.h>
// include pkg{DistUpgrade,AllUpgrade,MiniizeUpgrade} here for compatiblity
using std::ostream;
#endif
#ifndef APT_9_CLEANER_HEADERS
#include <apt-pkg/upgrade.h>
#include <apt-pkg/update.h>
#endif
class pkgSimulate : public pkgPackageManager /*{{{*/
{
protected:
class Policy : public pkgDepCache::Policy
{
pkgDepCache *Cache;
public:
virtual VerIterator GetCandidateVer(PkgIterator const &Pkg)
{
return (*Cache)[Pkg].CandidateVerIter(*Cache);
}
Policy(pkgDepCache *Cache) : Cache(Cache) {};
};
unsigned char *Flags;
Policy iPolicy;
pkgDepCache Sim;
pkgDepCache::ActionGroup group;
// The Actuall installation implementation
virtual bool Install(PkgIterator Pkg,std::string File);
virtual bool Configure(PkgIterator Pkg);
virtual bool Remove(PkgIterator Pkg,bool Purge);
private:
void ShortBreaks();
void Describe(PkgIterator iPkg,std::ostream &out,bool Current,bool Candidate);
public:
pkgSimulate(pkgDepCache *Cache);
~pkgSimulate();
};
/*}}}*/
class pkgProblemResolver /*{{{*/
{
private:
/** \brief dpointer placeholder (for later in case we need it) */
void *d;
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)};
int *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);
bool ResolveInternal(bool const BrokenFix = false);
bool ResolveByKeepInternal();
protected:
bool InstOrNewPolicyBroken(pkgCache::PkgIterator Pkg);
public:
inline void Protect(pkgCache::PkgIterator Pkg) {Flags[Pkg->ID] |= Protected; Cache.MarkProtected(Pkg);};
inline void Remove(pkgCache::PkgIterator Pkg) {Flags[Pkg->ID] |= ToRemove;};
inline void Clear(pkgCache::PkgIterator Pkg) {Flags[Pkg->ID] &= ~(Protected | 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();
__deprecated void InstallProtect();
pkgProblemResolver(pkgDepCache *Cache);
~pkgProblemResolver();
};
/*}}}*/
bool pkgApplyStatus(pkgDepCache &Cache);
bool pkgFixBroken(pkgDepCache &Cache);
void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List);
#endif
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