without a filename we can't stat pipes

[apt.git] / apt-pkg / pkgcache.cc

diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc
index 324445fa70d1018fe61f39c58ba6c9bac1d89672..58a63459fa1e9abdbdef70bb7d584f16ab42c0c7 100644 (file)
--- 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!!
    
    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 
    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 Files                                                       /*{{{*/

+#include<config.h>
+

 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/policy.h>
 #include <apt-pkg/version.h>
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/policy.h>
 #include <apt-pkg/version.h>


@@ -27,15 +29,17 @@
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/aptconfiguration.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 <apt-pkg/macros.h>
 

-#include <apti18n.h>
-    
+#include <stddef.h>
+#include <string.h>
+#include <ostream>
+#include <vector>

 #include <string>
 #include <sys/stat.h>
 #include <string>
 #include <sys/stat.h>

-#include <unistd.h>

 
 

-#include <ctype.h>
+#include <apti18n.h>

                                                                        /*}}}*/
 
 using std::string;
                                                                        /*}}}*/
 
 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;
    /* 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);
    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));
    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  /*{{{*/
 }
                                                                        /*}}}*/
 // 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"));
 
        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)
    // Locate our VS..
    if (HeaderP->VerSysName == 0 ||
        (VS = pkgVersioningSystem::GetVS(StrP + HeaderP->VerSysName)) == 0)


@@ -175,19 +188,18 @@ bool pkgCache::ReMap(bool const &Errorchecks)
 unsigned long pkgCache::sHash(const string &Str) const
 {
    unsigned long Hash = 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
 {
    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);
 }
    return Hash % _count(HeaderP->PkgHashTable);
 }

-

                                                                        /*}}}*/
 // Cache::SingleArchFindPkg - Locate a package by name                 /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // 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)
    {
    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);
 }
    }
    return PkgIterator(*this,0);
 }


@@ -211,12 +228,18 @@ pkgCache::PkgIterator pkgCache::SingleArchFindPkg(const string &Name)
 // ---------------------------------------------------------------------
 /* Returns 0 on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) {
 // ---------------------------------------------------------------------
 /* 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)
        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);
        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);
        if (Arch == "any")
                return FindPkg(Name, "any");
        return FindPkg(Name.substr(0, found), Arch);


@@ -226,9 +249,9 @@ 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) {
 // ---------------------------------------------------------------------
 /* 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" ||
                if (Arch == "native" || Arch == "all" || Arch == "any" ||

-                   Arch == _config->Find("APT::Architecture"))
+                   Arch == NativeArch())

                        return SingleArchFindPkg(Name);
                else
                        return PkgIterator(*this,0);
                        return SingleArchFindPkg(Name);
                else
                        return PkgIterator(*this,0);


@@ -253,9 +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) {
        // 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);
                        return GrpIterator(*this, Grp);

+               else if (cmp < 0)
+                       break;

        }
 
        return GrpIterator(*this,0);
        }
 
        return GrpIterator(*this,0);


@@ -267,22 +295,22 @@ pkgCache::GrpIterator pkgCache::FindGrp(const string &Name) {
    type in the weird debian style.. */
 const char *pkgCache::CompTypeDeb(unsigned char Comp)
 {
    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       /*{{{*/
 // ---------------------------------------------------------------------
 }
                                                                        /*}}}*/
 // 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)
 {
    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            /*{{{*/
 }
                                                                        /*}}}*/
 // Cache::DepType - Return a string describing the dep type            /*{{{*/


@@ -317,22 +345,22 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(string Arch) const {
        if (unlikely(IsGood() == false || S->FirstPackage == 0))
                return PkgIterator(*Owner, 0);
 
        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. */
        /* 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 = myArch;
+       if (Arch == "native" || Arch == myArch || Arch == "all") {

                pkgCache::Package *Pkg = Owner->PkgP + S->LastPackage;
                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);
                        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),
        /* Iterate over the list to find the matching arch
           unfortunately this list includes "package noise"
           (= different packages with same calculated hash),


@@ -364,6 +392,10 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPreferredPkg(bool const &Prefer
                if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
                        return Pkg;
        }
                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);
 
        if (PreferNonVirtual == true)
                return FindPreferredPkg(false);


@@ -389,7 +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. */
 // 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)
 {
    // Follow the current links
    if (S != Owner->GrpP)


@@ -401,12 +433,12 @@ void pkgCache::GrpIterator::operator ++(int)
       HashIndex++;
       S = Owner->GrpP + Owner->HeaderP->GrpHashTable[HashIndex];
    }
       HashIndex++;
       S = Owner->GrpP + Owner->HeaderP->GrpHashTable[HashIndex];
    }

-};
+}

                                                                        /*}}}*/
 // PkgIterator::operator ++ - Postfix incr                             /*{{{*/
 // ---------------------------------------------------------------------
 /* This will advance to the next logical package in the hash table. */
                                                                        /*}}}*/
 // 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)
 {
    // Follow the current links
    if (S != Owner->PkgP)


@@ -418,7 +450,7 @@ void pkgCache::PkgIterator::operator ++(int)
       HashIndex++;
       S = Owner->PkgP + Owner->HeaderP->PkgHashTable[HashIndex];
    }
       HashIndex++;
       S = Owner->PkgP + Owner->HeaderP->PkgHashTable[HashIndex];
    }

-};
+}

                                                                        /*}}}*/
 // PkgIterator::State - Check the State of the package                 /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // PkgIterator::State - Check the State of the package                 /*{{{*/
 // ---------------------------------------------------------------------


@@ -450,35 +482,35 @@ pkgCache::PkgIterator::OkState pkgCache::PkgIterator::State() const
 // ---------------------------------------------------------------------
 /* Return string representing of the candidate version. */
 const char *
 // ---------------------------------------------------------------------
 /* 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;
 {
   //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 *
                                                                        /*}}}*/
 // 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;
 {
   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)
                                                                        /*}}}*/
 // 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& 
    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";
 {
    if (Pkg.end() == true)
       return out << "invalid package";


@@ -503,7 +535,8 @@ std::string pkgCache::PkgIterator::FullName(bool const &Pretty) const
 {
    string fullname = Name();
    if (Pretty == false ||
 {
    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;
 }
       return fullname.append(":").append(Arch());
    return fullname;
 }


@@ -514,15 +547,24 @@ std::string pkgCache::PkgIterator::FullName(bool const &Pretty) const
    conflicts (including dpkg's Breaks fields). */
 bool pkgCache::DepIterator::IsCritical() const
 {
    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;
 }
                                                                        /*}}}*/
        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
 // DepIterator::SmartTargetPkg - Resolve dep target pointers w/provides        /*{{{*/
 // ---------------------------------------------------------------------
 /* This intellegently looks at dep target packages and tries to figure


@@ -553,7 +595,7 @@ bool pkgCache::DepIterator::SmartTargetPkg(PkgIterator &Result) const
       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();
       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)
 
    // Nothing but indirect self provides
    if (PStart.end() == true)


@@ -561,7 +603,7 @@ bool pkgCache::DepIterator::SmartTargetPkg(PkgIterator &Result) const
    
    // Check for single packages in the provides list
    PrvIterator P = PStart;
    
    // 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())
    {
       // Skip over self provides
       if (P.OwnerPkg() == ParentPkg())


@@ -595,34 +637,26 @@ pkgCache::Version **pkgCache::DepIterator::AllTargets() const
       PkgIterator DPkg = TargetPkg();
 
       // Walk along the actual package providing versions
       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;
            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;
            continue;

-        
+

         Size++;
         if (Res != 0)
            *End++ = I;
       }
       
       // Follow all provides
         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;
            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;
            continue;

-        
+

         Size++;
         if (Res != 0)
            *End++ = I.OwnerVer();
         Size++;
         if (Res != 0)
            *End++ = I.OwnerVer();


@@ -664,10 +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     /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // 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";
 {
    if (D.end() == true)
       return out << "invalid dependency";


@@ -705,7 +813,7 @@ int pkgCache::VerIterator::CompareVer(const VerIterator &B) const
    /* 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;
    /* 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;
       if (I == B)
         return 1;
    return -1;


@@ -714,10 +822,10 @@ int pkgCache::VerIterator::CompareVer(const VerIterator &B) const
 // VerIterator::Downloadable - Checks if the version is downloadable   /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // VerIterator::Downloadable - Checks if the version is downloadable   /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool pkgCache::VerIterator::Downloadable() const
+APT_PURE bool pkgCache::VerIterator::Downloadable() const

 {
    VerFileIterator Files = FileList();
 {
    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;
       if ((Files.File()->Flags & pkgCache::Flag::NotSource) != pkgCache::Flag::NotSource)
         return true;
    return false;


@@ -727,33 +835,16 @@ bool pkgCache::VerIterator::Downloadable() const
 // ---------------------------------------------------------------------
 /* This checks to see if any of the versions files are not NotAutomatic. 
    True if this version is selectable for automatic installation. */
 // ---------------------------------------------------------------------
 /* 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();
 {
    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;
 }
                                                                        /*}}}*/
       // 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 - Check if this version is a pseudo one         /*{{{*/
-// ---------------------------------------------------------------------
-/* Sometimes you have the need to express dependencies with versions
-   which doesn't really exist or exist multiply times for "different"
-   packages. We need these versions for dependency resolution but they
-   are a problem everytime we need to download/install something. */
-bool pkgCache::VerIterator::Pseudo() const
-{
-   if (S->MultiArch == pkgCache::Version::All &&
-          strcmp(Arch(true),"all") != 0)
-   {
-          GrpIterator const Grp = ParentPkg().Group();
-          return (Grp->LastPackage != Grp->FirstPackage);
-   }
-   return false;
-}
-                                                                       /*}}}*/

 // VerIterator::NewestFile - Return the newest file version relation   /*{{{*/
 // ---------------------------------------------------------------------
 /* This looks at the version numbers associated with all of the sources
 // VerIterator::NewestFile - Return the newest file version relation   /*{{{*/
 // ---------------------------------------------------------------------
 /* This looks at the version numbers associated with all of the sources


@@ -762,7 +853,7 @@ pkgCache::VerFileIterator pkgCache::VerIterator::NewestFile() const
 {
    VerFileIterator Files = FileList();
    VerFileIterator Highest = Files;
 {
    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;
    {
       if (Owner->VS->CmpReleaseVer(Files.File().Version(),Highest.File().Version()) > 0)
         Highest = Files;


@@ -779,7 +870,7 @@ string pkgCache::VerIterator::RelStr() const
 {
    bool First = true;
    string Res;
 {
    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();
    {
       // Do not print 'not source' entries'
       pkgCache::PkgFileIterator File = I.File();


@@ -788,7 +879,7 @@ string pkgCache::VerIterator::RelStr() const
 
       // See if we have already printed this out..
       bool Seen = false;
 
       // 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)
       {
         pkgCache::PkgFileIterator File2 = J.File();
         if (File2->Label == 0 || File->Label == 0)


@@ -840,6 +931,18 @@ string pkgCache::VerIterator::RelStr() const
    return Res;
 }
                                                                        /*}}}*/
    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
 // 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


@@ -882,28 +985,54 @@ string pkgCache::PkgFileIterator::RelStr()
                                                                        /*}}}*/
 // VerIterator::TranslatedDescription - Return the a DescIter for locale/*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // 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();
  * 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 DescDefault = DescriptionList();
-      pkgCache::DescIterator Desc = DescDefault;
-
-      for (; Desc.end() == false; Desc++)
-        if (*l == Desc.LanguageCode() ||
-            (*l == "en" && strcmp(Desc.LanguageCode(),"") == 0))
+      pkgCache::DescIterator Desc = DescriptionList();
+      for (; Desc.end() == false; ++Desc)
+        if (*l == Desc.LanguageCode())

            break;
            break;

-      if (Desc.end() == true) 
-        Desc = DescDefault;
+      if (Desc.end() == true)
+      {
+        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;
    }
       return Desc;
    }

-
+   for (pkgCache::DescIterator Desc = DescriptionList();
+       Desc.end() == false; ++Desc)
+      if (strcmp(Desc.LanguageCode(), "") == 0)
+        return Desc;

    return DescriptionList();
    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;
+}
+                                                                       /*}}}*/