implement generic config fallback for methods

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

diff --git a/apt-pkg/pkgsystem.h b/apt-pkg/pkgsystem.h
index 3a447da8bc318510597bae233f016856f249b83d..affaa5c9af9bb86261d3447b053a663c66c5d4f3 100644 (file)
--- a/apt-pkg/pkgsystem.h
+++ b/apt-pkg/pkgsystem.h
@@ -51,8 +51,9 @@ class pkgVersioningSystem;
 class Configuration;
 class pkgIndexFile;
 
 class Configuration;
 class pkgIndexFile;
 

+class pkgSystemPrivate;

 class pkgSystem
 class pkgSystem

-{   
+{

    public:
 
    // Global list of supported systems
    public:
 
    // Global list of supported systems


@@ -60,8 +61,8 @@ class pkgSystem
    static unsigned long GlobalListLen;
    static pkgSystem *GetSystem(const char *Label);
    
    static unsigned long GlobalListLen;
    static pkgSystem *GetSystem(const char *Label);
    

-   const char *Label;
-   pkgVersioningSystem *VS;
+   const char * const Label;
+   pkgVersioningSystem * const VS;

    
    /* Prevent other programs from touching shared data not covered by
       other locks (cache or state locks) */
    
    /* Prevent other programs from touching shared data not covered by
       other locks (cache or state locks) */


@@ -81,7 +82,8 @@ class pkgSystem
    virtual bool ArchiveSupported(const char *Type) = 0;
 
    // Return a list of system index files..
    virtual bool ArchiveSupported(const char *Type) = 0;
 
    // Return a list of system index files..

-   virtual bool AddStatusFiles(std::vector<pkgIndexFile *> &List) = 0;   
+   virtual bool AddStatusFiles(std::vector<pkgIndexFile *> &List) = 0;
+

    virtual bool FindIndex(pkgCache::PkgFileIterator File,
                          pkgIndexFile *&Found) const = 0;
 
    virtual bool FindIndex(pkgCache::PkgFileIterator File,
                          pkgIndexFile *&Found) const = 0;
 


@@ -90,11 +92,36 @@ class pkgSystem
    virtual signed Score(Configuration const &/*Cnf*/) {
       return 0;
    };
    virtual signed Score(Configuration const &/*Cnf*/) {
       return 0;
    };

-   
-   pkgSystem();
+
+   //FIXME: these methods should be virtual
+   /** does this system has support for MultiArch?
+    *
+    * Systems supporting only single arch (not systems which are single arch)
+    * are considered legacy systems and support for it will likely degrade over
+    * time.
+    *
+    * The default implementation returns always \b true.
+    *
+    * @return \b true if the system supports MultiArch, \b false if not.
+    */
+   bool MultiArchSupported() const;
+   /** architectures supported by this system
+    *
+    * A MultiArch capable system might be configured to use
+    * this capability.
+    *
+    * @return a list of all architectures (native + foreign) configured
+    * for on this system (aka: which can be installed without force)
+    */
+   std::vector<std::string> ArchitecturesSupported() const;
+
+   APT_HIDDEN void SetVersionMapping(map_id_t const in, map_id_t const out);
+   APT_HIDDEN map_id_t GetVersionMapping(map_id_t const in) const;
+
+   pkgSystem(char const * const Label, pkgVersioningSystem * const VS);

    virtual ~pkgSystem();
    private:
    virtual ~pkgSystem();
    private:

-   void *d;
+   pkgSystemPrivate * const d;

 };
 
 // The environment we are operating in.
 };
 
 // The environment we are operating in.