X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/ea50fdfe2fc21757412baf448b2d41b3ce34b626..949d2e98a0fc00afc6e9cf78a724d0d578a3ca2a:/apt-pkg/pkgcache.cc diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc index ed24d9ea8..91b75f52e 100644 --- a/apt-pkg/pkgcache.cc +++ b/apt-pkg/pkgcache.cc @@ -8,7 +8,7 @@ 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 @@ -20,6 +20,8 @@ ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + #include #include #include @@ -27,15 +29,17 @@ #include #include #include +#include #include -#include - +#include +#include +#include +#include #include #include -#include -#include +#include /*}}}*/ using std::string; @@ -51,7 +55,11 @@ pkgCache::Header::Header() /* 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); @@ -84,6 +92,8 @@ pkgCache::Header::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 /*{{{*/ @@ -155,6 +165,9 @@ bool pkgCache::ReMap(bool const &Errorchecks) 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) @@ -176,18 +189,17 @@ 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); + 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 /*{{{*/ // --------------------------------------------------------------------- @@ -200,9 +212,14 @@ pkgCache::PkgIterator pkgCache::SingleArchFindPkg(const string &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); } @@ -232,7 +249,7 @@ pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) { // --------------------------------------------------------------------- /* 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 == NativeArch()) return SingleArchFindPkg(Name); @@ -259,9 +276,14 @@ pkgCache::GrpIterator pkgCache::FindGrp(const string &Name) { // 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); @@ -273,22 +295,22 @@ pkgCache::GrpIterator pkgCache::FindGrp(const string &Name) { 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 /*{{{*/ @@ -370,6 +392,10 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPreferredPkg(bool const &Prefer 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); @@ -395,7 +421,7 @@ pkgCache::PkgIterator pkgCache::GrpIterator::NextPkg(pkgCache::PkgIterator const // 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) @@ -407,12 +433,12 @@ void pkgCache::GrpIterator::operator ++(int) 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) @@ -424,7 +450,7 @@ void pkgCache::PkgIterator::operator ++(int) HashIndex++; S = Owner->PkgP + Owner->HeaderP->PkgHashTable[HashIndex]; } -}; +} /*}}}*/ // PkgIterator::State - Check the State of the package /*{{{*/ // --------------------------------------------------------------------- @@ -456,35 +482,35 @@ pkgCache::PkgIterator::OkState pkgCache::PkgIterator::State() const // --------------------------------------------------------------------- /* 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"; @@ -613,13 +639,11 @@ pkgCache::Version **pkgCache::DepIterator::AllTargets() const // Walk along the actual package providing versions 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 (IsNegative() == true && - ParentPkg() == I.ParentPkg()) + if (IsSatisfied(I) == false) continue; - + Size++; if (Res != 0) *End++ = I; @@ -628,13 +652,11 @@ pkgCache::Version **pkgCache::DepIterator::AllTargets() const // Follow all provides 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 (IsNegative() == true && - ParentPkg() == I.OwnerPkg()) + if (IsSatisfied(I) == false) continue; - + Size++; if (Res != 0) *End++ = I.OwnerVer(); @@ -676,10 +698,84 @@ void pkgCache::DepIterator::GlobOr(DepIterator &Start,DepIterator &End) } } /*}}}*/ +// 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"; @@ -749,9 +845,6 @@ bool pkgCache::VerIterator::Automatic() const 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 @@ -838,6 +931,18 @@ string pkgCache::VerIterator::RelStr() const 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 @@ -880,7 +985,7 @@ string pkgCache::PkgFileIterator::RelStr() /*}}}*/ // 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 @@ -891,11 +996,22 @@ pkgCache::DescIterator pkgCache::VerIterator::TranslatedDescription() const { 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(); @@ -903,6 +1019,20 @@ pkgCache::DescIterator pkgCache::VerIterator::TranslatedDescription() const 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; +} + /*}}}*/