merged from http://code.launchpad.net/~donkult/apt/sid

[apt.git] / apt-pkg / cacheiterators.h

diff --git a/apt-pkg/cacheiterators.h b/apt-pkg/cacheiterators.h
index e2ca746838ce075977406c5d669607efc39504f7..26070636e33ddbfc72af418d0e064bde06f99aeb 100644 (file)
--- a/apt-pkg/cacheiterators.h
+++ b/apt-pkg/cacheiterators.h
@@ -29,10 +29,14 @@
                                                                        /*}}}*/
 #ifndef PKGLIB_CACHEITERATORS_H
 #define PKGLIB_CACHEITERATORS_H
+#include<iterator>
+
+#include<string.h>
 // abstract Iterator template                                          /*{{{*/
 /* This template provides the very basic iterator methods we
    need to have for doing some walk-over-the-cache magic */
-template<typename Str, typename Itr> class pkgCache::Iterator {
+template<typename Str, typename Itr> class pkgCache::Iterator :
+                       public std::iterator<std::forward_iterator_tag, Str> {
        protected:
        Str *S;
        pkgCache *Owner;
@@ -64,13 +68,19 @@ template<typename Str, typename Itr> class pkgCache::Iterator {
        inline operator Str const *() const {return S == OwnerPointer() ? 0 : S;};
        inline Str &operator *() {return *S;};
        inline Str const &operator *() const {return *S;};
-       inline pkgCache *Cache() {return Owner;};
+       inline pkgCache *Cache() const {return Owner;};
 
        // Mixed stuff
        inline void operator =(const Itr &B) {S = B.S; Owner = B.Owner;};
        inline bool IsGood() const { return S && Owner && ! end();};
        inline unsigned long Index() const {return S - OwnerPointer();};
 
+       void ReMap(void const * const oldMap, void const * const newMap) {
+               if (Owner == 0 || S == 0)
+                       return;
+               S += (Str*)(newMap) - (Str*)(oldMap);
+       }
+
        // Constructors - look out for the variable assigning
        inline Iterator() : S(0), Owner(0) {};
        inline Iterator(pkgCache &Owner,Str *T = 0) : S(T), Owner(&Owner) {};
@@ -101,8 +111,16 @@ class pkgCache::GrpIterator: public Iterator<Group, GrpIterator> {
 
        inline const char *Name() const {return S->Name == 0?0:Owner->StrP + S->Name;};
        inline PkgIterator PackageList() const;
-       PkgIterator FindPkg(string Arch = "any");
-       PkgIterator NextPkg(PkgIterator const &Pkg);
+       PkgIterator FindPkg(string Arch = "any") const;
+       /** \brief find the package with the "best" architecture
+
+           The best architecture is either the "native" or the first
+           in the list of Architectures which is not an end-Pointer
+
+           \param PreferNonVirtual tries to respond with a non-virtual package
+                  and only if this fails returns the best virtual package */
+       PkgIterator FindPreferredPkg(bool const &PreferNonVirtual = true) const;
+       PkgIterator NextPkg(PkgIterator const &Pkg) const;
 
        // Constructors
        inline GrpIterator(pkgCache &Owner, Group *Trg) : Iterator<Group, GrpIterator>(Owner, Trg), HashIndex(0) {
@@ -176,6 +194,13 @@ class pkgCache::VerIterator : public Iterator<Version, VerIterator> {
 
        // Comparison
        int CompareVer(const VerIterator &B) const;
+       /** \brief compares two version and returns if they are similar
+
+           This method should be used to identify if two pseudo versions are
+           refering to the same "real" version */
+       inline bool SimilarVer(const VerIterator &B) const {
+               return (B.end() == false && S->Hash == B->Hash && strcmp(VerStr(), B.VerStr()) == 0);
+       };
 
        // Accessors
        inline const char *VerStr() const {return S->VerStr == 0?0:Owner->StrP + S->VerStr;};
@@ -198,8 +223,8 @@ class pkgCache::VerIterator : public Iterator<Version, VerIterator> {
        inline PrvIterator ProvidesList() const;
        inline VerFileIterator FileList() const;
        bool Downloadable() const;
-       inline const char *PriorityType() {return Owner->Priority(S->Priority);};
-       string RelStr();
+       inline const char *PriorityType() const {return Owner->Priority(S->Priority);};
+       string RelStr() const;
 
        bool Automatic() const;
        bool Pseudo() const;
@@ -256,17 +281,20 @@ class pkgCache::DepIterator : public Iterator<Dependency, DepIterator> {
 
        // Accessors
        inline const char *TargetVer() const {return S->Version == 0?0:Owner->StrP + S->Version;};
-       inline PkgIterator TargetPkg() {return PkgIterator(*Owner,Owner->PkgP + S->Package);};
-       inline PkgIterator SmartTargetPkg() {PkgIterator R(*Owner,0);SmartTargetPkg(R);return R;};
-       inline VerIterator ParentVer() {return VerIterator(*Owner,Owner->VerP + S->ParentVer);};
-       inline PkgIterator ParentPkg() {return PkgIterator(*Owner,Owner->PkgP + Owner->VerP[S->ParentVer].ParentPkg);};
-       inline bool Reverse() {return Type == DepRev;};
-       bool IsCritical();
+       inline PkgIterator TargetPkg() const {return PkgIterator(*Owner,Owner->PkgP + S->Package);};
+       inline PkgIterator SmartTargetPkg() const {PkgIterator R(*Owner,0);SmartTargetPkg(R);return R;};
+       inline VerIterator ParentVer() const {return VerIterator(*Owner,Owner->VerP + S->ParentVer);};
+       inline PkgIterator ParentPkg() const {return PkgIterator(*Owner,Owner->PkgP + Owner->VerP[S->ParentVer].ParentPkg);};
+       inline bool Reverse() const {return Type == DepRev;};
+       bool IsCritical() const;
        void GlobOr(DepIterator &Start,DepIterator &End);
-       Version **AllTargets();
-       bool SmartTargetPkg(PkgIterator &Result);
-       inline const char *CompType() {return Owner->CompType(S->CompareOp);};
-       inline const char *DepType() {return Owner->DepType(S->Type);};
+       Version **AllTargets() const;
+       bool SmartTargetPkg(PkgIterator &Result) const;
+       inline const char *CompType() const {return Owner->CompType(S->CompareOp);};
+       inline const char *DepType() const {return Owner->DepType(S->Type);};
+
+       //Nice printable representation
+       friend std::ostream& operator <<(std::ostream& out, DepIterator D);
 
        inline DepIterator(pkgCache &Owner, Dependency *Trg, Version* = 0) :
                Iterator<Dependency, DepIterator>(Owner, Trg), Type(DepVer) {
@@ -299,9 +327,9 @@ class pkgCache::PrvIterator : public Iterator<Provides, PrvIterator> {
        // Accessors
        inline const char *Name() const {return Owner->StrP + Owner->PkgP[S->ParentPkg].Name;};
        inline const char *ProvideVersion() const {return S->ProvideVersion == 0?0:Owner->StrP + S->ProvideVersion;};
-       inline PkgIterator ParentPkg() {return PkgIterator(*Owner,Owner->PkgP + S->ParentPkg);};
-       inline VerIterator OwnerVer() {return VerIterator(*Owner,Owner->VerP + S->Version);};
-       inline PkgIterator OwnerPkg() {return PkgIterator(*Owner,Owner->PkgP + Owner->VerP[S->Version].ParentPkg);};
+       inline PkgIterator ParentPkg() const {return PkgIterator(*Owner,Owner->PkgP + S->ParentPkg);};
+       inline VerIterator OwnerVer() const {return VerIterator(*Owner,Owner->VerP + S->Version);};
+       inline PkgIterator OwnerPkg() const {return PkgIterator(*Owner,Owner->PkgP + Owner->VerP[S->Version].ParentPkg);};
 
        inline PrvIterator() : Iterator<Provides, PrvIterator>(), Type(PrvVer) {};