]> git.saurik.com Git - apt.git/blobdiff - apt-pkg/pkgcache.cc
do not redownload unchanged InRelease files
[apt.git] / apt-pkg / pkgcache.cc
index 997c70768adb192ea89c5be5974b74ec7c1d5c19..d7725563b07c8979df8eb9e23a0d73cb33faed47 100644 (file)
@@ -52,7 +52,7 @@ 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;
+   MinorVersion = 1;
    Dirty = false;
    
    HeaderSz = sizeof(pkgCache::Header);
@@ -182,18 +182,17 @@ 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                 /*{{{*/
 // ---------------------------------------------------------------------
@@ -206,9 +205,14 @@ 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);
 }
@@ -238,7 +242,7 @@ 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);
@@ -265,9 +269,14 @@ 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);
@@ -279,22 +288,22 @@ 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            /*{{{*/
@@ -376,6 +385,10 @@ 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);
@@ -621,8 +634,7 @@ pkgCache::Version **pkgCache::DepIterator::AllTargets() const
       {
         if (IsIgnorable(I.ParentPkg()) == true)
            continue;
-
-        if (Owner->VS->CheckDep(I.VerStr(),S->CompareOp,TargetVer()) == false)
+        if (IsSatisfied(I) == false)
            continue;
 
         Size++;
@@ -635,8 +647,7 @@ pkgCache::Version **pkgCache::DepIterator::AllTargets() const
       {
         if (IsIgnorable(I) == true)
            continue;
-
-        if (Owner->VS->CheckDep(I.ProvideVersion(),S->CompareOp,TargetVer()) == false)
+        if (IsSatisfied(I) == false)
            continue;
 
         Size++;
@@ -686,8 +697,29 @@ void pkgCache::DepIterator::GlobOr(DepIterator &Start,DepIterator &End)
    on virtual packages. */
 bool pkgCache::DepIterator::IsIgnorable(PkgIterator const &Pkg) const
 {
-   if (ParentPkg() == TargetPkg())
-      return IsNegative();
+   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;
 }
@@ -708,6 +740,31 @@ bool pkgCache::DepIterator::IsIgnorable(PrvIterator const &Prv) const
    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     /*{{{*/
 // ---------------------------------------------------------------------
 /* */
@@ -946,3 +1003,17 @@ pkgCache::DescIterator pkgCache::VerIterator::TranslatedDescription() const
 };
 
                                                                        /*}}}*/
+// 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;
+}
+                                                                       /*}}}*/