]> git.saurik.com Git - apt.git/blobdiff - apt-pkg/pkgcachegen.cc
merge with debian-sid 0.8.15.1
[apt.git] / apt-pkg / pkgcachegen.cc
index 2a4a30349a49535a5c57d0d2c730933e2e9146ae..9820fde81996c413494970f74f4eb57834b8cba9 100644 (file)
@@ -22,6 +22,7 @@
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/sptr.h>
 #include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/macros.h>
 
 #include <apt-pkg/tagfile.h>
 
@@ -33,9 +34,9 @@
 #include <unistd.h>
 #include <errno.h>
 #include <stdio.h>
-#include <system.h>
                                                                        /*}}}*/
 typedef vector<pkgIndexFile *>::iterator FileIterator;
+template <typename Iter> std::vector<Iter*> pkgCacheGenerator::Dynamic<Iter>::toReMap;
 
 // CacheGenerator::pkgCacheGenerator - Constructor                     /*{{{*/
 // ---------------------------------------------------------------------
@@ -61,8 +62,12 @@ pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
 
       // Starting header
       *Cache.HeaderP = pkgCache::Header();
-      Cache.HeaderP->VerSysName = Map.WriteString(_system->VS->Label);
-      Cache.HeaderP->Architecture = Map.WriteString(_config->Find("APT::Architecture"));
+      map_ptrloc const idxVerSysName = WriteStringInMap(_system->VS->Label);
+      Cache.HeaderP->VerSysName = idxVerSysName;
+      map_ptrloc const idxArchitecture = WriteStringInMap(_config->Find("APT::Architecture"));
+      Cache.HeaderP->Architecture = idxArchitecture;
+      if (unlikely(idxVerSysName == 0 || idxArchitecture == 0))
+        return;
       Cache.ReMap();
    }
    else
@@ -96,6 +101,67 @@ pkgCacheGenerator::~pkgCacheGenerator()
    Map.Sync(0,sizeof(pkgCache::Header));
 }
                                                                        /*}}}*/
+void pkgCacheGenerator::ReMap(void const * const oldMap, void const * const newMap) {/*{{{*/
+   if (oldMap == newMap)
+      return;
+
+   Cache.ReMap(false);
+
+   CurrentFile += (pkgCache::PackageFile*) newMap - (pkgCache::PackageFile*) oldMap;
+
+   for (size_t i = 0; i < _count(UniqHash); ++i)
+      if (UniqHash[i] != 0)
+        UniqHash[i] += (pkgCache::StringItem*) newMap - (pkgCache::StringItem*) oldMap;
+
+   for (std::vector<pkgCache::GrpIterator*>::const_iterator i = Dynamic<pkgCache::GrpIterator>::toReMap.begin();
+       i != Dynamic<pkgCache::GrpIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::PkgIterator*>::const_iterator i = Dynamic<pkgCache::PkgIterator>::toReMap.begin();
+       i != Dynamic<pkgCache::PkgIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::VerIterator*>::const_iterator i = Dynamic<pkgCache::VerIterator>::toReMap.begin();
+       i != Dynamic<pkgCache::VerIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::DepIterator*>::const_iterator i = Dynamic<pkgCache::DepIterator>::toReMap.begin();
+       i != Dynamic<pkgCache::DepIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::DescIterator*>::const_iterator i = Dynamic<pkgCache::DescIterator>::toReMap.begin();
+       i != Dynamic<pkgCache::DescIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::PrvIterator*>::const_iterator i = Dynamic<pkgCache::PrvIterator>::toReMap.begin();
+       i != Dynamic<pkgCache::PrvIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::PkgFileIterator*>::const_iterator i = Dynamic<pkgCache::PkgFileIterator>::toReMap.begin();
+       i != Dynamic<pkgCache::PkgFileIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+}                                                                      /*}}}*/
+// CacheGenerator::WriteStringInMap                                    /*{{{*/
+map_ptrloc pkgCacheGenerator::WriteStringInMap(const char *String,
+                                       const unsigned long &Len) {
+   void const * const oldMap = Map.Data();
+   map_ptrloc const index = Map.WriteString(String, Len);
+   if (index != 0)
+      ReMap(oldMap, Map.Data());
+   return index;
+}
+                                                                       /*}}}*/
+// CacheGenerator::WriteStringInMap                                    /*{{{*/
+map_ptrloc pkgCacheGenerator::WriteStringInMap(const char *String) {
+   void const * const oldMap = Map.Data();
+   map_ptrloc const index = Map.WriteString(String);
+   if (index != 0)
+      ReMap(oldMap, Map.Data());
+   return index;
+}
+                                                                       /*}}}*/
+map_ptrloc pkgCacheGenerator::AllocateInMap(const unsigned long &size) {/*{{{*/
+   void const * const oldMap = Map.Data();
+   map_ptrloc const index = Map.Allocate(size);
+   if (index != 0)
+      ReMap(oldMap, Map.Data());
+   return index;
+}
+                                                                       /*}}}*/
 // CacheGenerator::MergeList - Merge the package list                  /*{{{*/
 // ---------------------------------------------------------------------
 /* This provides the generation of the entries in the cache. Each loop
@@ -108,13 +174,16 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
    unsigned int Counter = 0;
    while (List.Step() == true)
    {
-      // Get a pointer to the package structure
       string const PackageName = List.Package();
       if (PackageName.empty() == true)
         return false;
 
+      string const Arch = List.Architecture();
+      // Get a pointer to the package structure
       pkgCache::PkgIterator Pkg;
-      if (NewPackage(Pkg, PackageName, List.Architecture()) == false)
+      Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
+      if (NewPackage(Pkg, PackageName, Arch) == false)
         return _error->Error(_("Error occurred while processing %s (NewPackage)"),PackageName.c_str());
       Counter++;
       if (Counter % 100 == 0 && Progress != 0)
@@ -129,18 +198,20 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
         // we first process the package, then the descriptions
         // (this has the bonus that we get MMap error when we run out
         //  of MMap space)
-        if (List.UsePackage(Pkg,pkgCache::VerIterator(Cache)) == false)
+        pkgCache::VerIterator Ver(Cache);
+        Dynamic<pkgCache::VerIterator> DynVer(Ver);
+        if (List.UsePackage(Pkg, Ver) == false)
            return _error->Error(_("Error occurred while processing %s (UsePackage1)"),
                                 PackageName.c_str());
 
         // Find the right version to write the description
         MD5SumValue CurMd5 = List.Description_md5();
-        pkgCache::VerIterator Ver = Pkg.VersionList();
-        map_ptrloc *LastVer = &Pkg->VersionList;
+        Ver = Pkg.VersionList();
 
-        for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
+        for (; Ver.end() == false; ++Ver)
         {
            pkgCache::DescIterator Desc = Ver.DescriptionList();
+           Dynamic<pkgCache::DescIterator> DynDesc(Desc);
            map_ptrloc *LastDesc = &Ver->DescriptionList;
            bool duplicate=false;
 
@@ -160,7 +231,11 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
               if (MD5SumValue(Desc.md5()) == CurMd5) 
                {
                  // Add new description
-                 *LastDesc = NewDescription(Desc, List.DescriptionLanguage(), CurMd5, *LastDesc);
+                 void const * const oldMap = Map.Data();
+                 map_ptrloc const descindex = NewDescription(Desc, List.DescriptionLanguage(), CurMd5, *LastDesc);
+                 if (oldMap != Map.Data())
+                    LastDesc += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+                 *LastDesc = descindex;
                  Desc->ParentPkg = Pkg.Index();
                  
                  if ((*LastDesc == 0 && _error->PendingError()) || NewFileDesc(Desc,List) == false)
@@ -174,19 +249,26 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
       }
 
       pkgCache::VerIterator Ver = Pkg.VersionList();
+      Dynamic<pkgCache::VerIterator> DynVer(Ver);
       map_ptrloc *LastVer = &Pkg->VersionList;
+      void const * oldMap = Map.Data();
       int Res = 1;
+      unsigned long const Hash = List.VersionHash();
       for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
       {
         Res = Cache.VS->CmpVersion(Version,Ver.VerStr());
-        if (Res >= 0)
+        // Version is higher as current version - insert here
+        if (Res > 0)
+           break;
+        // Versionstrings are equal - is hash also equal?
+        if (Res == 0 && Ver->Hash == Hash)
            break;
+        // proceed with the next till we have either the right
+        // or we found another version (which will be lower)
       }
-      
-      /* We already have a version for this item, record that we
-         saw it */
-      unsigned long Hash = List.VersionHash();
-      if (Res == 0 && Ver->Hash == Hash)
+
+      /* We already have a version for this item, record that we saw it */
+      if (Res == 0 && Ver.end() == false && Ver->Hash == Hash)
       {
         if (List.UsePackage(Pkg,Ver) == false)
            return _error->Error(_("Error occurred while processing %s (UsePackage2)"),
@@ -205,35 +287,31 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
         }
         
         continue;
-      }      
-
-      // Skip to the end of the same version set.
-      if (Res == 0)
-      {
-        for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
-        {
-           Res = Cache.VS->CmpVersion(Version,Ver.VerStr());
-           if (Res != 0)
-              break;
-        }
       }
 
       // Add a new version
-      *LastVer = NewVersion(Ver,Version,*LastVer);
+      map_ptrloc const verindex = NewVersion(Ver,Version,*LastVer);
+      if (verindex == 0 && _error->PendingError())
+        return _error->Error(_("Error occurred while processing %s (NewVersion%d)"),
+                             PackageName.c_str(), 1);
+
+      if (oldMap != Map.Data())
+        LastVer += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+      *LastVer = verindex;
       Ver->ParentPkg = Pkg.Index();
       Ver->Hash = Hash;
 
-      if ((*LastVer == 0 && _error->PendingError()) || List.NewVersion(Ver) == false)
-        return _error->Error(_("Error occurred while processing %s (NewVersion1)"),
-                             PackageName.c_str());
+      if (List.NewVersion(Ver) == false)
+        return _error->Error(_("Error occurred while processing %s (NewVersion%d)"),
+                             PackageName.c_str(), 2);
 
       if (List.UsePackage(Pkg,Ver) == false)
         return _error->Error(_("Error occurred while processing %s (UsePackage3)"),
                              PackageName.c_str());
       
       if (NewFileVer(Ver,List) == false)
-        return _error->Error(_("Error occurred while processing %s (NewVersion2)"),
-                             PackageName.c_str());
+        return _error->Error(_("Error occurred while processing %s (NewVersion%d)"),
+                             PackageName.c_str(), 3);
 
       // Read only a single record and return
       if (OutVer != 0)
@@ -246,13 +324,18 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
       /* Record the Description data. Description data always exist in
         Packages and Translation-* files. */
       pkgCache::DescIterator Desc = Ver.DescriptionList();
+      Dynamic<pkgCache::DescIterator> DynDesc(Desc);
       map_ptrloc *LastDesc = &Ver->DescriptionList;
-      
+
       // Skip to the end of description set
       for (; Desc.end() == false; LastDesc = &Desc->NextDesc, Desc++);
 
       // Add new description
-      *LastDesc = NewDescription(Desc, List.DescriptionLanguage(), List.Description_md5(), *LastDesc);
+      oldMap = Map.Data();
+      map_ptrloc const descindex = NewDescription(Desc, List.DescriptionLanguage(), List.Description_md5(), *LastDesc);
+      if (oldMap != Map.Data())
+        LastDesc += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+      *LastDesc = descindex;
       Desc->ParentPkg = Pkg.Index();
 
       if ((*LastDesc == 0 && _error->PendingError()) || NewFileDesc(Desc,List) == false)
@@ -298,6 +381,7 @@ bool pkgCacheGenerator::MergeFileProvides(ListParser &List)
         continue;
       
       pkgCache::PkgIterator Pkg = Cache.FindPkg(PackageName);
+      Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
       if (Pkg.end() == true)
         return _error->Error(_("Error occurred while processing %s (FindPkg)"),
                                PackageName.c_str());
@@ -307,6 +391,7 @@ bool pkgCacheGenerator::MergeFileProvides(ListParser &List)
 
       unsigned long Hash = List.VersionHash();
       pkgCache::VerIterator Ver = Pkg.VersionList();
+      Dynamic<pkgCache::VerIterator> DynVer(Ver);
       for (; Ver.end() == false; Ver++)
       {
         if (Ver->Hash == Hash && Version.c_str() == Ver.VerStr())
@@ -327,29 +412,30 @@ bool pkgCacheGenerator::MergeFileProvides(ListParser &List)
 // CacheGenerator::NewGroup - Add a new group                          /*{{{*/
 // ---------------------------------------------------------------------
 /* This creates a new group structure and adds it to the hash table */
-bool pkgCacheGenerator::NewGroup(pkgCache::GrpIterator &Grp, const string &Name) {
-       Grp = Cache.FindGrp(Name);
-       if (Grp.end() == false)
-               return true;
-
-       // Get a structure
-       unsigned long const Group = Map.Allocate(sizeof(pkgCache::Group));
-       if (unlikely(Group == 0))
-               return false;
+bool pkgCacheGenerator::NewGroup(pkgCache::GrpIterator &Grp, const string &Name)
+{
+   Grp = Cache.FindGrp(Name);
+   if (Grp.end() == false)
+      return true;
 
-       Grp = pkgCache::GrpIterator(Cache, Cache.GrpP + Group);
-       Grp->Name = Map.WriteString(Name);
-       if (unlikely(Grp->Name == 0))
-               return false;
+   // Get a structure
+   map_ptrloc const Group = AllocateInMap(sizeof(pkgCache::Group));
+   if (unlikely(Group == 0))
+      return false;
 
-       // Insert it into the hash table
-       unsigned long const Hash = Cache.Hash(Name);
-       Grp->Next = Cache.HeaderP->GrpHashTable[Hash];
-       Cache.HeaderP->GrpHashTable[Hash] = Group;
+   Grp = pkgCache::GrpIterator(Cache, Cache.GrpP + Group);
+   map_ptrloc const idxName = WriteStringInMap(Name);
+   if (unlikely(idxName == 0))
+      return false;
+   Grp->Name = idxName;
 
-       Cache.HeaderP->GroupCount++;
+   // Insert it into the hash table
+   unsigned long const Hash = Cache.Hash(Name);
+   Grp->Next = Cache.HeaderP->GrpHashTable[Hash];
+   Cache.HeaderP->GrpHashTable[Hash] = Group;
 
-       return true;
+   Grp->ID = Cache.HeaderP->GroupCount++;
+   return true;
 }
                                                                        /*}}}*/
 // CacheGenerator::NewPackage - Add a new package                      /*{{{*/
@@ -358,6 +444,7 @@ bool pkgCacheGenerator::NewGroup(pkgCache::GrpIterator &Grp, const string &Name)
 bool pkgCacheGenerator::NewPackage(pkgCache::PkgIterator &Pkg,const string &Name,
                                        const string &Arch) {
    pkgCache::GrpIterator Grp;
+   Dynamic<pkgCache::GrpIterator> DynGrp(Grp);
    if (unlikely(NewGroup(Grp, Name) == false))
       return false;
 
@@ -366,27 +453,37 @@ bool pkgCacheGenerator::NewPackage(pkgCache::PkgIterator &Pkg,const string &Name
         return true;
 
    // Get a structure
-   unsigned long const Package = Map.Allocate(sizeof(pkgCache::Package));
+   map_ptrloc const Package = AllocateInMap(sizeof(pkgCache::Package));
    if (unlikely(Package == 0))
       return false;
    Pkg = pkgCache::PkgIterator(Cache,Cache.PkgP + Package);
 
-   // Insert it into the hash table
-   unsigned long const Hash = Cache.Hash(Name);
-   Pkg->NextPackage = Cache.HeaderP->PkgHashTable[Hash];
-   Cache.HeaderP->PkgHashTable[Hash] = Package;
-
-   // remember the packages in the group
-   Grp->FirstPackage = Package;
-   if (Grp->LastPackage == 0)
-      Grp->LastPackage = Package;
+   // Insert the package into our package list
+   if (Grp->FirstPackage == 0) // the group is new
+   {
+      // Insert it into the hash table
+      unsigned long const Hash = Cache.Hash(Name);
+      Pkg->NextPackage = Cache.HeaderP->PkgHashTable[Hash];
+      Cache.HeaderP->PkgHashTable[Hash] = Package;
+      Grp->FirstPackage = Package;
+   }
+   else // Group the Packages together
+   {
+      // this package is the new last package
+      pkgCache::PkgIterator LastPkg(Cache, Cache.PkgP + Grp->LastPackage);
+      Pkg->NextPackage = LastPkg->NextPackage;
+      LastPkg->NextPackage = Package;
+   }
+   Grp->LastPackage = Package;
 
    // Set the name, arch and the ID
    Pkg->Name = Grp->Name;
    Pkg->Group = Grp.Index();
-   Pkg->Arch = WriteUniqString(Arch.c_str());
-   if (unlikely(Pkg->Arch == 0))
+   // all is mapped to the native architecture
+   map_ptrloc const idxArch = (Arch == "all") ? Cache.HeaderP->Architecture : WriteUniqString(Arch.c_str());
+   if (unlikely(idxArch == 0))
       return false;
+   Pkg->Arch = idxArch;
    Pkg->ID = Cache.HeaderP->PackageCount++;
 
    return true;
@@ -402,7 +499,7 @@ bool pkgCacheGenerator::NewFileVer(pkgCache::VerIterator &Ver,
       return true;
    
    // Get a structure
-   unsigned long VerFile = Map.Allocate(sizeof(pkgCache::VerFile));
+   map_ptrloc const VerFile = AllocateInMap(sizeof(pkgCache::VerFile));
    if (VerFile == 0)
       return 0;
    
@@ -433,7 +530,7 @@ unsigned long pkgCacheGenerator::NewVersion(pkgCache::VerIterator &Ver,
                                            unsigned long Next)
 {
    // Get a structure
-   unsigned long Version = Map.Allocate(sizeof(pkgCache::Version));
+   map_ptrloc const Version = AllocateInMap(sizeof(pkgCache::Version));
    if (Version == 0)
       return 0;
    
@@ -441,9 +538,10 @@ unsigned long pkgCacheGenerator::NewVersion(pkgCache::VerIterator &Ver,
    Ver = pkgCache::VerIterator(Cache,Cache.VerP + Version);
    Ver->NextVer = Next;
    Ver->ID = Cache.HeaderP->VersionCount++;
-   Ver->VerStr = Map.WriteString(VerStr);
-   if (Ver->VerStr == 0)
+   map_ptrloc const idxVerStr = WriteStringInMap(VerStr);
+   if (unlikely(idxVerStr == 0))
       return 0;
+   Ver->VerStr = idxVerStr;
    
    return Version;
 }
@@ -458,7 +556,7 @@ bool pkgCacheGenerator::NewFileDesc(pkgCache::DescIterator &Desc,
       return true;
    
    // Get a structure
-   unsigned long DescFile = Map.Allocate(sizeof(pkgCache::DescFile));
+   map_ptrloc const DescFile = AllocateInMap(sizeof(pkgCache::DescFile));
    if (DescFile == 0)
       return false;
 
@@ -491,7 +589,7 @@ map_ptrloc pkgCacheGenerator::NewDescription(pkgCache::DescIterator &Desc,
                                            map_ptrloc Next)
 {
    // Get a structure
-   map_ptrloc Description = Map.Allocate(sizeof(pkgCache::Description));
+   map_ptrloc const Description = AllocateInMap(sizeof(pkgCache::Description));
    if (Description == 0)
       return 0;
 
@@ -499,10 +597,12 @@ map_ptrloc pkgCacheGenerator::NewDescription(pkgCache::DescIterator &Desc,
    Desc = pkgCache::DescIterator(Cache,Cache.DescP + Description);
    Desc->NextDesc = Next;
    Desc->ID = Cache.HeaderP->DescriptionCount++;
-   Desc->language_code = Map.WriteString(Lang);
-   Desc->md5sum = Map.WriteString(md5sum.Value());
-   if (Desc->language_code == 0 || Desc->md5sum == 0)
+   map_ptrloc const idxlanguage_code = WriteStringInMap(Lang);
+   map_ptrloc const idxmd5sum = WriteStringInMap(md5sum.Value());
+   if (unlikely(idxlanguage_code == 0 || idxmd5sum == 0))
       return 0;
+   Desc->language_code = idxlanguage_code;
+   Desc->md5sum = idxmd5sum;
 
    return Description;
 }
@@ -510,40 +610,69 @@ map_ptrloc pkgCacheGenerator::NewDescription(pkgCache::DescIterator &Desc,
 // CacheGenerator::FinishCache - do various finish operations          /*{{{*/
 // ---------------------------------------------------------------------
 /* This prepares the Cache for delivery */
-bool pkgCacheGenerator::FinishCache(OpProgress &Progress) {
-       // FIXME: add progress reporting for this operation
-       // Do we have different architectures in your groups ?
-       vector<string> archs = APT::Configuration::getArchitectures();
-       if (archs.size() > 1) {
-               // Create Conflicts in between the group
-               for (pkgCache::GrpIterator G = GetCache().GrpBegin(); G.end() != true; G++) {
-                       string const PkgName = G.Name();
-                       for (pkgCache::PkgIterator P = G.PackageList(); P.end() != true; P = G.NextPkg(P)) {
-                               for (pkgCache::VerIterator V = P.VersionList(); V.end() != true; V++) {
-                                       // Arch all packages are "co-installable"
-                                       if (V->MultiArch == pkgCache::Version::All)
-                                               continue;
-                                       string const Arch = V.Arch();
-                                       map_ptrloc *OldDepLast = NULL;
-                                       for (vector<string>::const_iterator A = archs.begin(); A != archs.end(); ++A) {
-                                               if (*A == Arch)
-                                                       continue;
-                                               /* We allow only one installed arch at the time
-                                                  per group, therefore each group member conflicts
-                                                  with all other group members */
-                                               pkgCache::PkgIterator D = G.FindPkg(*A);
-                                               if (D.end() == true)
-                                                       continue;
-                                               // Conflicts: ${self}:other
-                                               NewDepends(D, V, "",
-                                                       pkgCache::Dep::NoOp, pkgCache::Dep::Conflicts,
-                                                       OldDepLast);
-                                       }
-                               }
-                       }
-               }
-       }
-       return true;
+bool pkgCacheGenerator::FinishCache(OpProgress *Progress)
+{
+   // FIXME: add progress reporting for this operation
+   // Do we have different architectures in your groups ?
+   vector<string> archs = APT::Configuration::getArchitectures();
+   if (archs.size() > 1)
+   {
+      // Create Conflicts in between the group
+      pkgCache::GrpIterator G = GetCache().GrpBegin();
+      Dynamic<pkgCache::GrpIterator> DynG(G);
+      for (; G.end() != true; G++)
+      {
+        string const PkgName = G.Name();
+        pkgCache::PkgIterator P = G.PackageList();
+        Dynamic<pkgCache::PkgIterator> DynP(P);
+        for (; P.end() != true; P = G.NextPkg(P))
+        {
+           pkgCache::PkgIterator allPkg;
+           Dynamic<pkgCache::PkgIterator> DynallPkg(allPkg);
+           pkgCache::VerIterator V = P.VersionList();
+           Dynamic<pkgCache::VerIterator> DynV(V);
+           for (; V.end() != true; V++)
+           {
+              char const * const Arch = P.Arch();
+              map_ptrloc *OldDepLast = NULL;
+              /* MultiArch handling introduces a lot of implicit Dependencies:
+               - MultiArch: same â†’ Co-Installable if they have the same version
+               - Architecture: all â†’ Need to be Co-Installable for internal reasons
+               - All others conflict with all other group members */
+              bool const coInstall = ((V->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same);
+              for (vector<string>::const_iterator A = archs.begin(); A != archs.end(); ++A)
+              {
+                 if (*A == Arch)
+                    continue;
+                 /* We allow only one installed arch at the time
+                    per group, therefore each group member conflicts
+                    with all other group members */
+                 pkgCache::PkgIterator D = G.FindPkg(*A);
+                 Dynamic<pkgCache::PkgIterator> DynD(D);
+                 if (D.end() == true)
+                    continue;
+                 if (coInstall == true)
+                 {
+                    // Replaces: ${self}:other ( << ${binary:Version})
+                    NewDepends(D, V, V.VerStr(),
+                               pkgCache::Dep::Less, pkgCache::Dep::Replaces,
+                               OldDepLast);
+                    // Breaks: ${self}:other (!= ${binary:Version})
+                    NewDepends(D, V, V.VerStr(),
+                               pkgCache::Dep::NotEquals, pkgCache::Dep::DpkgBreaks,
+                               OldDepLast);
+                 } else {
+                       // Conflicts: ${self}:other
+                       NewDepends(D, V, "",
+                                  pkgCache::Dep::NoOp, pkgCache::Dep::Conflicts,
+                                  OldDepLast);
+                 }
+              }
+           }
+        }
+      }
+   }
+   return true;
 }
                                                                        /*}}}*/
 // CacheGenerator::NewDepends - Create a dependency element            /*{{{*/
@@ -557,13 +686,15 @@ bool pkgCacheGenerator::NewDepends(pkgCache::PkgIterator &Pkg,
                                   unsigned int const &Type,
                                   map_ptrloc *OldDepLast)
 {
+   void const * const oldMap = Map.Data();
    // Get a structure
-   unsigned long const Dependency = Map.Allocate(sizeof(pkgCache::Dependency));
+   map_ptrloc const Dependency = AllocateInMap(sizeof(pkgCache::Dependency));
    if (unlikely(Dependency == 0))
       return false;
    
    // Fill it in
    pkgCache::DepIterator Dep(Cache,Cache.DepP + Dependency);
+   Dynamic<pkgCache::DepIterator> DynDep(Dep);
    Dep->ParentVer = Ver.Index();
    Dep->Type = Type;
    Dep->CompareOp = Op;
@@ -575,9 +706,12 @@ bool pkgCacheGenerator::NewDepends(pkgCache::PkgIterator &Pkg,
 /*      for (pkgCache::DepIterator I = Pkg.RevDependsList(); I.end() == false; I++)
         if (I->Version != 0 && I.TargetVer() == Version)
            Dep->Version = I->Version;*/
-      if (Dep->Version == 0)
-        if (unlikely((Dep->Version = Map.WriteString(Version)) == 0))
+      if (Dep->Version == 0) {
+        map_ptrloc const index = WriteStringInMap(Version);
+        if (unlikely(index == 0))
            return false;
+        Dep->Version = index;
+      }
    }
 
    // Link it to the package
@@ -591,7 +725,8 @@ bool pkgCacheGenerator::NewDepends(pkgCache::PkgIterator &Pkg,
       OldDepLast = &Ver->DependsList;
       for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; D++)
         OldDepLast = &D->NextDepends;
-   }
+   } else if (oldMap != Map.Data())
+      OldDepLast += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
 
    Dep->NextDepends = *OldDepLast;
    *OldDepLast = Dep.Index();
@@ -604,7 +739,7 @@ bool pkgCacheGenerator::NewDepends(pkgCache::PkgIterator &Pkg,
 // ---------------------------------------------------------------------
 /* This creates a Group and the Package to link this dependency to if
    needed and handles also the caching of the old endpoint */
-bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator Ver,
+bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator &Ver,
                                               const string &PackageName,
                                               const string &Arch,
                                               const string &Version,
@@ -612,11 +747,13 @@ bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator Ver,
                                               unsigned int Type)
 {
    pkgCache::GrpIterator Grp;
+   Dynamic<pkgCache::GrpIterator> DynGrp(Grp);
    if (unlikely(Owner->NewGroup(Grp, PackageName) == false))
       return false;
 
    // Locate the target package
    pkgCache::PkgIterator Pkg = Grp.FindPkg(Arch);
+   Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
    if (Pkg.end() == true) {
       if (unlikely(Owner->NewPackage(Pkg, PackageName, Arch) == false))
         return false;
@@ -638,24 +775,27 @@ bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator Ver,
 // ListParser::NewProvides - Create a Provides element                 /*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool pkgCacheGenerator::ListParser::NewProvides(pkgCache::VerIterator Ver,
-                                               const string &PackageName,
+bool pkgCacheGenerator::ListParser::NewProvides(pkgCache::VerIterator &Ver,
+                                               const string &PkgName,
+                                               const string &PkgArch,
                                                const string &Version)
 {
    pkgCache &Cache = Owner->Cache;
 
    // We do not add self referencing provides
-   if (unlikely(Ver.ParentPkg().Name() == PackageName))
+   if (Ver.ParentPkg().Name() == PkgName && (PkgArch == Ver.ParentPkg().Arch() ||
+       (PkgArch == "all" && strcmp((Cache.StrP + Cache.HeaderP->Architecture), Ver.ParentPkg().Arch()) == 0)))
       return true;
    
    // Get a structure
-   unsigned long const Provides = Owner->Map.Allocate(sizeof(pkgCache::Provides));
+   map_ptrloc const Provides = Owner->AllocateInMap(sizeof(pkgCache::Provides));
    if (unlikely(Provides == 0))
       return false;
    Cache.HeaderP->ProvidesCount++;
    
    // Fill it in
    pkgCache::PrvIterator Prv(Cache,Cache.ProvideP + Provides,Cache.PkgP);
+   Dynamic<pkgCache::PrvIterator> DynPrv(Prv);
    Prv->Version = Ver.Index();
    Prv->NextPkgProv = Ver->ProvidesList;
    Ver->ProvidesList = Prv.Index();
@@ -664,7 +804,8 @@ bool pkgCacheGenerator::ListParser::NewProvides(pkgCache::VerIterator Ver,
    
    // Locate the target package
    pkgCache::PkgIterator Pkg;
-   if (unlikely(Owner->NewPackage(Pkg,PackageName,string(Ver.Arch())) == false))
+   Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
+   if (unlikely(Owner->NewPackage(Pkg,PkgName, PkgArch) == false))
       return false;
    
    // Link it to the package
@@ -684,24 +825,29 @@ bool pkgCacheGenerator::SelectFile(const string &File,const string &Site,
                                   unsigned long Flags)
 {
    // Get some space for the structure
-   CurrentFile = Cache.PkgFileP + Map.Allocate(sizeof(*CurrentFile));
-   if (CurrentFile == Cache.PkgFileP)
+   map_ptrloc const idxFile = AllocateInMap(sizeof(*CurrentFile));
+   if (unlikely(idxFile == 0))
       return false;
-   
+   CurrentFile = Cache.PkgFileP + idxFile;
+
    // Fill it in
-   CurrentFile->FileName = Map.WriteString(File);
-   CurrentFile->Site = WriteUniqString(Site);
+   map_ptrloc const idxFileName = WriteStringInMap(File);
+   map_ptrloc const idxSite = WriteUniqString(Site);
+   if (unlikely(idxFileName == 0 || idxSite == 0))
+      return false;
+   CurrentFile->FileName = idxFileName;
+   CurrentFile->Site = idxSite;
    CurrentFile->NextFile = Cache.HeaderP->FileList;
    CurrentFile->Flags = Flags;
    CurrentFile->ID = Cache.HeaderP->PackageFileCount;
-   CurrentFile->IndexType = WriteUniqString(Index.GetType()->Label);
+   map_ptrloc const idxIndexType = WriteUniqString(Index.GetType()->Label);
+   if (unlikely(idxIndexType == 0))
+      return false;
+   CurrentFile->IndexType = idxIndexType;
    PkgFileName = File;
    Cache.HeaderP->FileList = CurrentFile - Cache.PkgFileP;
    Cache.HeaderP->PackageFileCount++;
 
-   if (CurrentFile->FileName == 0)
-      return false;
-   
    if (Progress != 0)
       Progress->SubProgress(Index.Size());
    return true;
@@ -741,18 +887,25 @@ unsigned long pkgCacheGenerator::WriteUniqString(const char *S,
    }
    
    // Get a structure
-   unsigned long Item = Map.Allocate(sizeof(pkgCache::StringItem));
+   void const * const oldMap = Map.Data();
+   map_ptrloc const Item = AllocateInMap(sizeof(pkgCache::StringItem));
    if (Item == 0)
       return 0;
 
+   map_ptrloc const idxString = WriteStringInMap(S,Size);
+   if (unlikely(idxString == 0))
+      return 0;
+   if (oldMap != Map.Data()) {
+      Last += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+      I += (pkgCache::StringItem*) Map.Data() - (pkgCache::StringItem*) oldMap;
+   }
+   *Last = Item;
+
    // Fill in the structure
    pkgCache::StringItem *ItemP = Cache.StringItemP + Item;
    ItemP->NextItem = I - Cache.StringItemP;
-   *Last = Item;
-   ItemP->String = Map.WriteString(S,Size);
-   if (ItemP->String == 0)
-      return 0;
-   
+   ItemP->String = idxString;
+
    Bucket = ItemP;
    return ItemP->String;
 }
@@ -765,16 +918,23 @@ unsigned long pkgCacheGenerator::WriteUniqString(const char *S,
 static bool CheckValidity(const string &CacheFile, FileIterator Start, 
                           FileIterator End,MMap **OutMap = 0)
 {
+   bool const Debug = _config->FindB("Debug::pkgCacheGen", false);
    // No file, certainly invalid
    if (CacheFile.empty() == true || FileExists(CacheFile) == false)
+   {
+      if (Debug == true)
+        std::clog << "CacheFile doesn't exist" << std::endl;
       return false;
-   
+   }
+
    // Map it
    FileFd CacheF(CacheFile,FileFd::ReadOnly);
    SPtr<MMap> Map = new MMap(CacheF,0);
    pkgCache Cache(Map);
    if (_error->PendingError() == true || Map->Size() == 0)
    {
+      if (Debug == true)
+        std::clog << "Errors are pending or Map is empty()" << std::endl;
       _error->Discard();
       return false;
    }
@@ -784,9 +944,15 @@ static bool CheckValidity(const string &CacheFile, FileIterator Start,
    SPtrArray<bool> Visited = new bool[Cache.HeaderP->PackageFileCount];
    memset(Visited,0,sizeof(*Visited)*Cache.HeaderP->PackageFileCount);
    for (; Start != End; Start++)
-   {      
+   {
+      if (Debug == true)
+        std::clog << "Checking PkgFile " << (*Start)->Describe() << ": ";
       if ((*Start)->HasPackages() == false)
+      {
+         if (Debug == true)
+           std::clog << "Has NO packages" << std::endl;
         continue;
+      }
     
       if ((*Start)->Exists() == false)
       {
@@ -794,23 +960,40 @@ static bool CheckValidity(const string &CacheFile, FileIterator Start,
         _error->WarningE("stat",_("Couldn't stat source package list %s"),
                          (*Start)->Describe().c_str());
 #endif
+         if (Debug == true)
+           std::clog << "file doesn't exist" << std::endl;
         continue;
       }
 
       // FindInCache is also expected to do an IMS check.
       pkgCache::PkgFileIterator File = (*Start)->FindInCache(Cache);
       if (File.end() == true)
+      {
+        if (Debug == true)
+           std::clog << "FindInCache returned end-Pointer" << std::endl;
         return false;
+      }
 
       Visited[File->ID] = true;
+      if (Debug == true)
+        std::clog << "with ID " << File->ID << " is valid" << std::endl;
    }
    
    for (unsigned I = 0; I != Cache.HeaderP->PackageFileCount; I++)
       if (Visited[I] == false)
+      {
+        if (Debug == true)
+           std::clog << "File with ID" << I << " wasn't visited" << std::endl;
         return false;
+      }
    
    if (_error->PendingError() == true)
    {
+      if (Debug == true)
+      {
+        std::clog << "Validity failed because of pending errors:" << std::endl;
+        _error->DumpErrors();
+      }
       _error->Discard();
       return false;
    }
@@ -840,7 +1023,7 @@ static unsigned long ComputeSize(FileIterator Start,FileIterator End)
 // ---------------------------------------------------------------------
 /* */
 static bool BuildCache(pkgCacheGenerator &Gen,
-                      OpProgress &Progress,
+                      OpProgress *Progress,
                       unsigned long &CurrentSize,unsigned long TotalSize,
                       FileIterator Start, FileIterator End)
 {
@@ -861,7 +1044,8 @@ static bool BuildCache(pkgCacheGenerator &Gen,
       }
       
       unsigned long Size = (*I)->Size();
-      Progress.OverallProgress(CurrentSize,TotalSize,Size,_("Reading package lists"));
+      if (Progress != NULL)
+        Progress->OverallProgress(CurrentSize,TotalSize,Size,_("Reading package lists"));
       CurrentSize += Size;
       
       if ((*I)->Merge(Gen,Progress) == false)
@@ -870,13 +1054,15 @@ static bool BuildCache(pkgCacheGenerator &Gen,
 
    if (Gen.HasFileDeps() == true)
    {
-      Progress.Done();
+      if (Progress != NULL)
+        Progress->Done();
       TotalSize = ComputeSize(Start, End);
       CurrentSize = 0;
       for (I = Start; I != End; I++)
       {
         unsigned long Size = (*I)->Size();
-        Progress.OverallProgress(CurrentSize,TotalSize,Size,_("Collecting File Provides"));
+        if (Progress != NULL)
+           Progress->OverallProgress(CurrentSize,TotalSize,Size,_("Collecting File Provides"));
         CurrentSize += Size;
         if ((*I)->MergeFileProvides(Gen,Progress) == false)
            return false;
@@ -886,7 +1072,21 @@ static bool BuildCache(pkgCacheGenerator &Gen,
    return true;
 }
                                                                        /*}}}*/
-// MakeStatusCache - Construct the status cache                                /*{{{*/
+// CacheGenerator::CreateDynamicMMap - load an mmap with configuration options /*{{{*/
+DynamicMMap* pkgCacheGenerator::CreateDynamicMMap(FileFd *CacheF, unsigned long Flags) {
+   unsigned long const MapStart = _config->FindI("APT::Cache-Start", 24*1024*1024);
+   unsigned long const MapGrow = _config->FindI("APT::Cache-Grow", 1*1024*1024);
+   unsigned long const MapLimit = _config->FindI("APT::Cache-Limit", 0);
+   Flags |= MMap::Moveable;
+   if (_config->FindB("APT::Cache-Fallback", false) == true)
+      Flags |= MMap::Fallback;
+   if (CacheF != NULL)
+      return new DynamicMMap(*CacheF, Flags, MapStart, MapGrow, MapLimit);
+   else
+      return new DynamicMMap(Flags, MapStart, MapGrow, MapLimit);
+}
+                                                                       /*}}}*/
+// CacheGenerator::MakeStatusCache - Construct the status cache                /*{{{*/
 // ---------------------------------------------------------------------
 /* This makes sure that the status cache (the cache that has all 
    index files from the sources list and all local ones) is ready
@@ -894,10 +1094,13 @@ static bool BuildCache(pkgCacheGenerator &Gen,
    the cache will be stored there. This is pretty much mandetory if you
    are using AllowMem. AllowMem lets the function be run as non-root
    where it builds the cache 'fast' into a memory buffer. */
-bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
+__deprecated bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
+                       MMap **OutMap, bool AllowMem)
+   { return pkgCacheGenerator::MakeStatusCache(List, &Progress, OutMap, AllowMem); }
+bool pkgCacheGenerator::MakeStatusCache(pkgSourceList &List,OpProgress *Progress,
                        MMap **OutMap,bool AllowMem)
 {
-   unsigned long MapSize = _config->FindI("APT::Cache-Limit",24*1024*1024);
+   bool const Debug = _config->FindB("Debug::pkgCacheGen", false);
    
    vector<pkgIndexFile *> Files;
    for (vector<metaIndex *>::const_iterator i = List.begin();
@@ -911,14 +1114,27 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
          Files.push_back (*j);
    }
    
-   unsigned long EndOfSource = Files.size();
+   unsigned long const EndOfSource = Files.size();
    if (_system->AddStatusFiles(Files) == false)
       return false;
 
    // Decide if we can write to the files..
-   string CacheFile = _config->FindFile("Dir::Cache::pkgcache");
-   string SrcCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
-   
+   string const CacheFile = _config->FindFile("Dir::Cache::pkgcache");
+   string const SrcCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
+
+   // ensure the cache directory exists
+   if (CacheFile.empty() == false || SrcCacheFile.empty() == false)
+   {
+      string dir = _config->FindDir("Dir::Cache");
+      size_t const len = dir.size();
+      if (len > 5 && dir.find("/apt/", len - 6, 5) == len - 5)
+        dir = dir.substr(0, len - 5);
+      if (CacheFile.empty() == false)
+        CreateDirectory(dir, flNotFile(CacheFile));
+      if (SrcCacheFile.empty() == false)
+        CreateDirectory(dir, flNotFile(SrcCacheFile));
+   }
+
    // Decide if we can write to the cache
    bool Writeable = false;
    if (CacheFile.empty() == false)
@@ -926,18 +1142,26 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    else
       if (SrcCacheFile.empty() == false)
         Writeable = access(flNotFile(SrcCacheFile).c_str(),W_OK) == 0;
-   
+   if (Debug == true)
+      std::clog << "Do we have write-access to the cache files? " << (Writeable ? "YES" : "NO") << std::endl;
+
    if (Writeable == false && AllowMem == false && CacheFile.empty() == false)
       return _error->Error(_("Unable to write to %s"),flNotFile(CacheFile).c_str());
-   
-   Progress.OverallProgress(0,1,1,_("Reading package lists"));
-   
+
+   if (Progress != NULL)
+      Progress->OverallProgress(0,1,1,_("Reading package lists"));
+
    // Cache is OK, Fin.
    if (CheckValidity(CacheFile,Files.begin(),Files.end(),OutMap) == true)
    {
-      Progress.OverallProgress(1,1,1,_("Reading package lists"));
+      if (Progress != NULL)
+        Progress->OverallProgress(1,1,1,_("Reading package lists"));
+      if (Debug == true)
+        std::clog << "pkgcache.bin is valid - no need to build anything" << std::endl;
       return true;
    }
+   else if (Debug == true)
+        std::clog << "pkgcache.bin is NOT valid" << std::endl;
    
    /* At this point we know we need to reconstruct the package cache,
       begin. */
@@ -946,16 +1170,20 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    if (Writeable == true && CacheFile.empty() == false)
    {
       unlink(CacheFile.c_str());
-      CacheF = new FileFd(CacheFile,FileFd::WriteEmpty);
+      CacheF = new FileFd(CacheFile,FileFd::WriteAtomic);
       fchmod(CacheF->Fd(),0644);
-      Map = new DynamicMMap(*CacheF,MMap::Public,MapSize);
+      Map = CreateDynamicMMap(CacheF, MMap::Public);
       if (_error->PendingError() == true)
         return false;
+      if (Debug == true)
+        std::clog << "Open filebased MMap" << std::endl;
    }
    else
    {
       // Just build it in memory..
-      Map = new DynamicMMap(0,MapSize);
+      Map = CreateDynamicMMap(NULL);
+      if (Debug == true)
+        std::clog << "Open memory Map (not filebased)" << std::endl;
    }
    
    // Lets try the source cache.
@@ -964,18 +1192,20 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    if (CheckValidity(SrcCacheFile,Files.begin(),
                     Files.begin()+EndOfSource) == true)
    {
+      if (Debug == true)
+        std::clog << "srcpkgcache.bin is valid - populate MMap with it." << std::endl;
       // Preload the map with the source cache
       FileFd SCacheF(SrcCacheFile,FileFd::ReadOnly);
-      unsigned long alloc = Map->RawAllocate(SCacheF.Size());
+      unsigned long const alloc = Map->RawAllocate(SCacheF.Size());
       if ((alloc == 0 && _error->PendingError())
                || SCacheF.Read((unsigned char *)Map->Data() + alloc,
                                SCacheF.Size()) == false)
         return false;
 
       TotalSize = ComputeSize(Files.begin()+EndOfSource,Files.end());
-      
+
       // Build the status cache
-      pkgCacheGenerator Gen(Map.Get(),&Progress);
+      pkgCacheGenerator Gen(Map.Get(),Progress);
       if (_error->PendingError() == true)
         return false;
       if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
@@ -987,10 +1217,12 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    }
    else
    {
+      if (Debug == true)
+        std::clog << "srcpkgcache.bin is NOT valid - rebuild" << std::endl;
       TotalSize = ComputeSize(Files.begin(),Files.end());
       
       // Build the source cache
-      pkgCacheGenerator Gen(Map.Get(),&Progress);
+      pkgCacheGenerator Gen(Map.Get(),Progress);
       if (_error->PendingError() == true)
         return false;
       if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
@@ -1000,7 +1232,7 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
       // Write it back
       if (Writeable == true && SrcCacheFile.empty() == false)
       {
-        FileFd SCacheF(SrcCacheFile,FileFd::WriteEmpty);
+        FileFd SCacheF(SrcCacheFile,FileFd::WriteAtomic);
         if (_error->PendingError() == true)
            return false;
         
@@ -1028,6 +1260,8 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
       // FIXME: move me to a better place
       Gen.FinishCache(Progress);
    }
+   if (Debug == true)
+      std::clog << "Caches are ready for shipping" << std::endl;
 
    if (_error->PendingError() == true)
       return false;
@@ -1047,26 +1281,28 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    return true;
 }
                                                                        /*}}}*/
-// MakeOnlyStatusCache - Build a cache with just the status files      /*{{{*/
+// CacheGenerator::MakeOnlyStatusCache - Build only a status files cache/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap)
+__deprecated bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap)
+   { return pkgCacheGenerator::MakeOnlyStatusCache(&Progress, OutMap); }
+bool pkgCacheGenerator::MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap)
 {
-   unsigned long MapSize = _config->FindI("APT::Cache-Limit",20*1024*1024);
    vector<pkgIndexFile *> Files;
    unsigned long EndOfSource = Files.size();
    if (_system->AddStatusFiles(Files) == false)
       return false;
-   
-   SPtr<DynamicMMap> Map = new DynamicMMap(0,MapSize);
+
+   SPtr<DynamicMMap> Map = CreateDynamicMMap(NULL);
    unsigned long CurrentSize = 0;
    unsigned long TotalSize = 0;
    
    TotalSize = ComputeSize(Files.begin()+EndOfSource,Files.end());
    
    // Build the status cache
-   Progress.OverallProgress(0,1,1,_("Reading package lists"));
-   pkgCacheGenerator Gen(Map.Get(),&Progress);
+   if (Progress != NULL)
+      Progress->OverallProgress(0,1,1,_("Reading package lists"));
+   pkgCacheGenerator Gen(Map.Get(),Progress);
    if (_error->PendingError() == true)
       return false;
    if (BuildCache(Gen,Progress,CurrentSize,TotalSize,