Please see doc/apt-pkg/cache.sgml for a more detailed description of
this format. Also be sure to keep that file up-to-date!!
- This is the general utility functions for cache managment. They provide
+ This is the general utility functions for cache management. They provide
a complete set of accessor functions for the cache. The cacheiterators
header contains the STL-like iterators that can be used to easially
navigate the cache as well as seemlessly dereference the mmap'd
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
+#include<config.h>
+
#include <apt-pkg/pkgcache.h>
#include <apt-pkg/policy.h>
#include <apt-pkg/version.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/mmap.h>
#include <apt-pkg/macros.h>
-#include <apti18n.h>
-
+#include <stddef.h>
+#include <string.h>
+#include <ostream>
+#include <vector>
#include <string>
#include <sys/stat.h>
-#include <unistd.h>
-#include <ctype.h>
+#include <apti18n.h>
/*}}}*/
using std::string;
/* Whenever the structures change the major version should be bumped,
whenever the generator changes the minor version should be bumped. */
MajorVersion = 8;
- MinorVersion = 0;
+#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
+ MinorVersion = 2;
+#else
+ MinorVersion = 1;
+#endif
Dirty = false;
HeaderSz = sizeof(pkgCache::Header);
memset(PkgHashTable,0,sizeof(PkgHashTable));
memset(GrpHashTable,0,sizeof(GrpHashTable));
memset(Pools,0,sizeof(Pools));
+
+ CacheFileSize = 0;
}
/*}}}*/
// Cache::Header::CheckSizes - Check if the two headers have same *sz /*{{{*/
HeaderP->CheckSizes(DefHeader) == false)
return _error->Error(_("The package cache file is an incompatible version"));
+ if (Map.Size() < HeaderP->CacheFileSize)
+ return _error->Error(_("The package cache file is corrupted, it is too small"));
+
// Locate our VS..
if (HeaderP->VerSysName == 0 ||
(VS = pkgVersioningSystem::GetVS(StrP + HeaderP->VerSysName)) == 0)
unsigned long pkgCache::sHash(const string &Str) const
{
unsigned long Hash = 0;
- for (string::const_iterator I = Str.begin(); I != Str.end(); I++)
- Hash = 5*Hash + tolower_ascii(*I);
+ for (string::const_iterator I = Str.begin(); I != Str.end(); ++I)
+ Hash = 41 * Hash + tolower_ascii(*I);
return Hash % _count(HeaderP->PkgHashTable);
}
unsigned long pkgCache::sHash(const char *Str) const
{
- unsigned long Hash = 0;
- for (const char *I = Str; *I != 0; I++)
- Hash = 5*Hash + tolower_ascii(*I);
+ unsigned long Hash = tolower_ascii(*Str);
+ for (const char *I = Str + 1; *I != 0; ++I)
+ Hash = 41 * Hash + tolower_ascii(*I);
return Hash % _count(HeaderP->PkgHashTable);
}
-
/*}}}*/
// Cache::SingleArchFindPkg - Locate a package by name /*{{{*/
// ---------------------------------------------------------------------
Package *Pkg = PkgP + HeaderP->PkgHashTable[Hash(Name)];
for (; Pkg != PkgP; Pkg = PkgP + Pkg->NextPackage)
{
- if (Pkg->Name != 0 && StrP[Pkg->Name] == Name[0] &&
- stringcasecmp(Name,StrP + Pkg->Name) == 0)
- return PkgIterator(*this,Pkg);
+ if (unlikely(Pkg->Name == 0))
+ continue;
+
+ int const cmp = strcasecmp(Name.c_str(), StrP + Pkg->Name);
+ if (cmp == 0)
+ return PkgIterator(*this, Pkg);
+ else if (cmp < 0)
+ break;
}
return PkgIterator(*this,0);
}
// ---------------------------------------------------------------------
/* Returns 0 on error, pointer to the package otherwise */
pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) {
- if (MultiArchCache() == false)
- return SingleArchFindPkg(Name);
size_t const found = Name.find(':');
if (found == string::npos)
- return FindPkg(Name, "native");
+ {
+ if (MultiArchCache() == false)
+ return SingleArchFindPkg(Name);
+ else
+ return FindPkg(Name, "native");
+ }
string const Arch = Name.substr(found+1);
+ /* Beware: This is specialcased to handle pkg:any in dependencies as
+ these are linked to virtual pkg:any named packages with all archs.
+ If you want any arch from a given pkg, use FindPkg(pkg,arch) */
if (Arch == "any")
return FindPkg(Name, "any");
return FindPkg(Name.substr(0, found), Arch);
// ---------------------------------------------------------------------
/* Returns 0 on error, pointer to the package otherwise */
pkgCache::PkgIterator pkgCache::FindPkg(const string &Name, string const &Arch) {
- if (MultiArchCache() == false) {
+ if (MultiArchCache() == false && Arch != "none") {
if (Arch == "native" || Arch == "all" || Arch == "any" ||
- Arch == _config->Find("APT::Architecture"))
+ Arch == NativeArch())
return SingleArchFindPkg(Name);
else
return PkgIterator(*this,0);
// Look at the hash bucket for the group
Group *Grp = GrpP + HeaderP->GrpHashTable[sHash(Name)];
for (; Grp != GrpP; Grp = GrpP + Grp->Next) {
- if (Grp->Name != 0 && StrP[Grp->Name] == Name[0] &&
- stringcasecmp(Name, StrP + Grp->Name) == 0)
+ if (unlikely(Grp->Name == 0))
+ continue;
+
+ int const cmp = strcasecmp(Name.c_str(), StrP + Grp->Name);
+ if (cmp == 0)
return GrpIterator(*this, Grp);
+ else if (cmp < 0)
+ break;
}
return GrpIterator(*this,0);
type in the weird debian style.. */
const char *pkgCache::CompTypeDeb(unsigned char Comp)
{
- const char *Ops[] = {"","<=",">=","<<",">>","=","!="};
- if ((unsigned)(Comp & 0xF) < 7)
- return Ops[Comp & 0xF];
- return "";
+ const char * const Ops[] = {"","<=",">=","<<",">>","=","!="};
+ if (unlikely((unsigned)(Comp & 0xF) >= sizeof(Ops)/sizeof(Ops[0])))
+ return "";
+ return Ops[Comp & 0xF];
}
/*}}}*/
// Cache::CompType - Return a string describing the compare type /*{{{*/
// ---------------------------------------------------------------------
-/* This returns a string representation of the dependency compare
+/* This returns a string representation of the dependency compare
type */
const char *pkgCache::CompType(unsigned char Comp)
{
- const char *Ops[] = {"","<=",">=","<",">","=","!="};
- if ((unsigned)(Comp & 0xF) < 7)
- return Ops[Comp & 0xF];
- return "";
+ const char * const Ops[] = {"","<=",">=","<",">","=","!="};
+ if (unlikely((unsigned)(Comp & 0xF) >= sizeof(Ops)/sizeof(Ops[0])))
+ return "";
+ return Ops[Comp & 0xF];
}
/*}}}*/
// Cache::DepType - Return a string describing the dep type /*{{{*/
if (unlikely(IsGood() == false || S->FirstPackage == 0))
return PkgIterator(*Owner, 0);
- static string const myArch = _config->Find("APT::Architecture");
+ /* If we accept any package we simply return the "first"
+ package in this group (the last one added). */
+ if (Arch == "any")
+ return PkgIterator(*Owner, Owner->PkgP + S->FirstPackage);
+
+ char const* const myArch = Owner->NativeArch();
/* Most of the time the package for our native architecture is
the one we add at first to the cache, but this would be the
last one we check, so we do it now. */
if (Arch == "native" || Arch == myArch || Arch == "all") {
- Arch = myArch;
pkgCache::Package *Pkg = Owner->PkgP + S->LastPackage;
- if (stringcasecmp(Arch, Owner->StrP + Pkg->Arch) == 0)
+ if (strcasecmp(myArch, Owner->StrP + Pkg->Arch) == 0)
return PkgIterator(*Owner, Pkg);
+ Arch = myArch;
}
- /* If we accept any package we simply return the "first"
- package in this group (the last one added). */
- if (Arch == "any")
- return PkgIterator(*Owner, Owner->PkgP + S->FirstPackage);
-
/* Iterate over the list to find the matching arch
unfortunately this list includes "package noise"
(= different packages with same calculated hash),
if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
return Pkg;
}
+ // packages without an architecture
+ Pkg = FindPkg("none");
+ if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
+ return Pkg;
if (PreferNonVirtual == true)
return FindPreferredPkg(false);
// GrpIterator::operator ++ - Postfix incr /*{{{*/
// ---------------------------------------------------------------------
/* This will advance to the next logical group in the hash table. */
-void pkgCache::GrpIterator::operator ++(int)
+void pkgCache::GrpIterator::operator ++(int)
{
// Follow the current links
if (S != Owner->GrpP)
HashIndex++;
S = Owner->GrpP + Owner->HeaderP->GrpHashTable[HashIndex];
}
-};
+}
/*}}}*/
// PkgIterator::operator ++ - Postfix incr /*{{{*/
// ---------------------------------------------------------------------
/* This will advance to the next logical package in the hash table. */
-void pkgCache::PkgIterator::operator ++(int)
+void pkgCache::PkgIterator::operator ++(int)
{
// Follow the current links
if (S != Owner->PkgP)
HashIndex++;
S = Owner->PkgP + Owner->HeaderP->PkgHashTable[HashIndex];
}
-};
+}
/*}}}*/
// PkgIterator::State - Check the State of the package /*{{{*/
// ---------------------------------------------------------------------
// ---------------------------------------------------------------------
/* Return string representing of the candidate version. */
const char *
-pkgCache::PkgIterator::CandVersion() const
+pkgCache::PkgIterator::CandVersion() const
{
//TargetVer is empty, so don't use it.
VerIterator version = pkgPolicy(Owner).GetCandidateVer(*this);
if (version.IsGood())
return version.VerStr();
return 0;
-};
+}
/*}}}*/
// PkgIterator::CurVersion - Returns the current version string /*{{{*/
// ---------------------------------------------------------------------
/* Return string representing of the current version. */
const char *
-pkgCache::PkgIterator::CurVersion() const
+pkgCache::PkgIterator::CurVersion() const
{
VerIterator version = CurrentVer();
if (version.IsGood())
return CurrentVer().VerStr();
return 0;
-};
+}
/*}}}*/
// ostream operator to handle string representation of a package /*{{{*/
// ---------------------------------------------------------------------
/* Output name < cur.rent.version -> candid.ate.version | new.est.version > (section)
- Note that the characters <|>() are all literal above. Versions will be ommited
+ Note that the characters <|>() are all literal above. Versions will be omitted
if they provide no new information (e.g. there is no newer version than candidate)
If no version and/or section can be found "none" is used. */
std::ostream&
-operator<<(ostream& out, pkgCache::PkgIterator Pkg)
+operator<<(std::ostream& out, pkgCache::PkgIterator Pkg)
{
if (Pkg.end() == true)
return out << "invalid package";
{
string fullname = Name();
if (Pretty == false ||
- (strcmp(Arch(), "all") != 0 && _config->Find("APT::Architecture") != Arch()))
+ (strcmp(Arch(), "all") != 0 &&
+ strcmp(Owner->NativeArch(), Arch()) != 0))
return fullname.append(":").append(Arch());
return fullname;
}
conflicts (including dpkg's Breaks fields). */
bool pkgCache::DepIterator::IsCritical() const
{
- if (S->Type == pkgCache::Dep::Conflicts ||
- S->Type == pkgCache::Dep::DpkgBreaks ||
- S->Type == pkgCache::Dep::Obsoletes ||
+ if (IsNegative() == true ||
S->Type == pkgCache::Dep::Depends ||
S->Type == pkgCache::Dep::PreDepends)
return true;
return false;
}
/*}}}*/
+// DepIterator::IsNegative - Returns true if the dep is a negative one /*{{{*/
+// ---------------------------------------------------------------------
+/* Some dependencies are positive like Depends and Recommends, others
+ are negative like Conflicts which can and should be handled differently */
+bool pkgCache::DepIterator::IsNegative() const
+{
+ return S->Type == Dep::DpkgBreaks ||
+ S->Type == Dep::Conflicts ||
+ S->Type == Dep::Obsoletes;
+}
+ /*}}}*/
// DepIterator::SmartTargetPkg - Resolve dep target pointers w/provides /*{{{*/
// ---------------------------------------------------------------------
/* This intellegently looks at dep target packages and tries to figure
virtual package libc-dev which is provided by libc5-dev and libc6-dev
we must ignore libc5-dev when considering the provides list. */
PrvIterator PStart = Result.ProvidesList();
- for (; PStart.end() != true && PStart.OwnerPkg() == ParentPkg(); PStart++);
+ for (; PStart.end() != true && PStart.OwnerPkg() == ParentPkg(); ++PStart);
// Nothing but indirect self provides
if (PStart.end() == true)
// Check for single packages in the provides list
PrvIterator P = PStart;
- for (; P.end() != true; P++)
+ for (; P.end() != true; ++P)
{
// Skip over self provides
if (P.OwnerPkg() == ParentPkg())
PkgIterator DPkg = TargetPkg();
// Walk along the actual package providing versions
- for (VerIterator I = DPkg.VersionList(); I.end() == false; I++)
+ for (VerIterator I = DPkg.VersionList(); I.end() == false; ++I)
{
- if (Owner->VS->CheckDep(I.VerStr(),S->CompareOp,TargetVer()) == false)
+ if (IsIgnorable(I.ParentPkg()) == true)
continue;
-
- if ((S->Type == pkgCache::Dep::Conflicts ||
- S->Type == pkgCache::Dep::DpkgBreaks ||
- S->Type == pkgCache::Dep::Obsoletes) &&
- ParentPkg() == I.ParentPkg())
+ if (IsSatisfied(I) == false)
continue;
-
+
Size++;
if (Res != 0)
*End++ = I;
}
// Follow all provides
- for (PrvIterator I = DPkg.ProvidesList(); I.end() == false; I++)
+ for (PrvIterator I = DPkg.ProvidesList(); I.end() == false; ++I)
{
- if (Owner->VS->CheckDep(I.ProvideVersion(),S->CompareOp,TargetVer()) == false)
+ if (IsIgnorable(I) == true)
continue;
-
- if ((S->Type == pkgCache::Dep::Conflicts ||
- S->Type == pkgCache::Dep::DpkgBreaks ||
- S->Type == pkgCache::Dep::Obsoletes) &&
- ParentPkg() == I.OwnerPkg())
+ if (IsSatisfied(I) == false)
continue;
-
+
Size++;
if (Res != 0)
*End++ = I.OwnerVer();
}
}
/*}}}*/
+// DepIterator::IsIgnorable - should this packag/providr be ignored? /*{{{*/
+// ---------------------------------------------------------------------
+/* Deps like self-conflicts should be ignored as well as implicit conflicts
+ on virtual packages. */
+bool pkgCache::DepIterator::IsIgnorable(PkgIterator const &/*Pkg*/) const
+{
+ if (IsNegative() == false)
+ return false;
+
+ pkgCache::PkgIterator PP = ParentPkg();
+ pkgCache::PkgIterator PT = TargetPkg();
+ if (PP->Group != PT->Group)
+ return false;
+ // self-conflict
+ if (PP == PT)
+ return true;
+ pkgCache::VerIterator PV = ParentVer();
+ // ignore group-conflict on a M-A:same package - but not our implicit dependencies
+ // so that we can have M-A:same packages conflicting with their own real name
+ if ((PV->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same)
+ {
+ // Replaces: ${self}:other ( << ${binary:Version})
+ if (S->Type == pkgCache::Dep::Replaces && S->CompareOp == pkgCache::Dep::Less && strcmp(PV.VerStr(), TargetVer()) == 0)
+ return false;
+ // Breaks: ${self}:other (!= ${binary:Version})
+ if (S->Type == pkgCache::Dep::DpkgBreaks && S->CompareOp == pkgCache::Dep::NotEquals && strcmp(PV.VerStr(), TargetVer()) == 0)
+ return false;
+ return true;
+ }
+
+ return false;
+}
+bool pkgCache::DepIterator::IsIgnorable(PrvIterator const &Prv) const
+{
+ if (IsNegative() == false)
+ return false;
+
+ PkgIterator const Pkg = ParentPkg();
+ /* Provides may never be applied against the same package (or group)
+ if it is a conflicts. See the comment above. */
+ if (Prv.OwnerPkg()->Group == Pkg->Group)
+ return true;
+ // Implicit group-conflicts should not be applied on providers of other groups
+ if (Pkg->Group == TargetPkg()->Group && Prv.OwnerPkg()->Group != Pkg->Group)
+ return true;
+
+ return false;
+}
+ /*}}}*/
+// DepIterator::IsMultiArchImplicit - added by the cache generation /*{{{*/
+// ---------------------------------------------------------------------
+/* MultiArch can be translated to SingleArch for an resolver and we did so,
+ by adding dependencies to help the resolver understand the problem, but
+ sometimes it is needed to identify these to ignore them… */
+bool pkgCache::DepIterator::IsMultiArchImplicit() const
+{
+ if (ParentPkg()->Arch != TargetPkg()->Arch &&
+ (S->Type == pkgCache::Dep::Replaces ||
+ S->Type == pkgCache::Dep::DpkgBreaks ||
+ S->Type == pkgCache::Dep::Conflicts))
+ return true;
+ return false;
+}
+ /*}}}*/
+// DepIterator::IsSatisfied - check if a version satisfied the dependency /*{{{*/
+bool pkgCache::DepIterator::IsSatisfied(VerIterator const &Ver) const
+{
+ return Owner->VS->CheckDep(Ver.VerStr(),S->CompareOp,TargetVer());
+}
+bool pkgCache::DepIterator::IsSatisfied(PrvIterator const &Prv) const
+{
+ return Owner->VS->CheckDep(Prv.ProvideVersion(),S->CompareOp,TargetVer());
+}
+ /*}}}*/
// ostream operator to handle string representation of a dependecy /*{{{*/
// ---------------------------------------------------------------------
/* */
-std::ostream& operator<<(ostream& out, pkgCache::DepIterator D)
+std::ostream& operator<<(std::ostream& out, pkgCache::DepIterator D)
{
if (D.end() == true)
return out << "invalid dependency";
/* Start at A and look for B. If B is found then A > B otherwise
B was before A so A < B */
VerIterator I = *this;
- for (;I.end() == false; I++)
+ for (;I.end() == false; ++I)
if (I == B)
return 1;
return -1;
// VerIterator::Downloadable - Checks if the version is downloadable /*{{{*/
// ---------------------------------------------------------------------
/* */
-bool pkgCache::VerIterator::Downloadable() const
+APT_PURE bool pkgCache::VerIterator::Downloadable() const
{
VerFileIterator Files = FileList();
- for (; Files.end() == false; Files++)
+ for (; Files.end() == false; ++Files)
if ((Files.File()->Flags & pkgCache::Flag::NotSource) != pkgCache::Flag::NotSource)
return true;
return false;
// ---------------------------------------------------------------------
/* This checks to see if any of the versions files are not NotAutomatic.
True if this version is selectable for automatic installation. */
-bool pkgCache::VerIterator::Automatic() const
+APT_PURE bool pkgCache::VerIterator::Automatic() const
{
VerFileIterator Files = FileList();
- for (; Files.end() == false; Files++)
+ for (; Files.end() == false; ++Files)
// Do not check ButAutomaticUpgrades here as it is kind of automatic…
if ((Files.File()->Flags & pkgCache::Flag::NotAutomatic) != pkgCache::Flag::NotAutomatic)
return true;
return false;
}
/*}}}*/
-// VerIterator::Pseudo - deprecated no-op method /*{{{*/
-bool pkgCache::VerIterator::Pseudo() const { return false; }
- /*}}}*/
// VerIterator::NewestFile - Return the newest file version relation /*{{{*/
// ---------------------------------------------------------------------
/* This looks at the version numbers associated with all of the sources
{
VerFileIterator Files = FileList();
VerFileIterator Highest = Files;
- for (; Files.end() == false; Files++)
+ for (; Files.end() == false; ++Files)
{
if (Owner->VS->CmpReleaseVer(Files.File().Version(),Highest.File().Version()) > 0)
Highest = Files;
{
bool First = true;
string Res;
- for (pkgCache::VerFileIterator I = this->FileList(); I.end() == false; I++)
+ for (pkgCache::VerFileIterator I = this->FileList(); I.end() == false; ++I)
{
// Do not print 'not source' entries'
pkgCache::PkgFileIterator File = I.File();
// See if we have already printed this out..
bool Seen = false;
- for (pkgCache::VerFileIterator J = this->FileList(); I != J; J++)
+ for (pkgCache::VerFileIterator J = this->FileList(); I != J; ++J)
{
pkgCache::PkgFileIterator File2 = J.File();
if (File2->Label == 0 || File->Label == 0)
return Res;
}
/*}}}*/
+// VerIterator::MultiArchType - string representing MultiArch flag /*{{{*/
+const char * pkgCache::VerIterator::MultiArchType() const
+{
+ if ((S->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same)
+ return "same";
+ else if ((S->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign)
+ return "foreign";
+ else if ((S->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)
+ return "allowed";
+ return "none";
+}
+ /*}}}*/
// PkgFileIterator::IsOk - Checks if the cache is in sync with the file /*{{{*/
// ---------------------------------------------------------------------
/* This stats the file and compares its stats with the ones that were
/*}}}*/
// VerIterator::TranslatedDescription - Return the a DescIter for locale/*{{{*/
// ---------------------------------------------------------------------
-/* return a DescIter for the current locale or the default if none is
+/* return a DescIter for the current locale or the default if none is
* found
*/
pkgCache::DescIterator pkgCache::VerIterator::TranslatedDescription() const
{
std::vector<string> const lang = APT::Configuration::getLanguages();
for (std::vector<string>::const_iterator l = lang.begin();
- l != lang.end(); l++)
+ l != lang.end(); ++l)
{
pkgCache::DescIterator Desc = DescriptionList();
for (; Desc.end() == false; ++Desc)
- if (*l == Desc.LanguageCode() ||
- (*l == "en" && strcmp(Desc.LanguageCode(),"") == 0))
+ if (*l == Desc.LanguageCode())
break;
if (Desc.end() == true)
- continue;
+ {
+ if (*l == "en")
+ {
+ Desc = DescriptionList();
+ for (; Desc.end() == false; ++Desc)
+ if (strcmp(Desc.LanguageCode(), "") == 0)
+ break;
+ if (Desc.end() == true)
+ continue;
+ }
+ else
+ continue;
+ }
return Desc;
}
for (pkgCache::DescIterator Desc = DescriptionList();
if (strcmp(Desc.LanguageCode(), "") == 0)
return Desc;
return DescriptionList();
-};
+}
/*}}}*/
+// PrvIterator::IsMultiArchImplicit - added by the cache generation /*{{{*/
+// ---------------------------------------------------------------------
+/* MultiArch can be translated to SingleArch for an resolver and we did so,
+ by adding provides to help the resolver understand the problem, but
+ sometimes it is needed to identify these to ignore them… */
+bool pkgCache::PrvIterator::IsMultiArchImplicit() const
+{
+ pkgCache::PkgIterator const Owner = OwnerPkg();
+ pkgCache::PkgIterator const Parent = ParentPkg();
+ if (strcmp(Owner.Arch(), Parent.Arch()) != 0 || Owner->Name == Parent->Name)
+ return true;
+ return false;
+}
+ /*}}}*/
projects / apt.git / blobdiff