implement generic config fallback for methods

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

diff --git a/apt-pkg/version.h b/apt-pkg/version.h
index 3ced5d3e431a5807cb2d63c8aaa8fd60a1961e4c..5110ecaa7d9f8d0ed4e11dd1534209faca6599f4 100644 (file)
--- a/apt-pkg/version.h
+++ b/apt-pkg/version.h
@@ -1,49 +1,61 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: version.h,v 1.2 1998/07/07 04:17:09 jgg Exp $
+// $Id: version.h,v 1.8 2001/05/27 05:55:27 jgg Exp $
 /* ######################################################################
 
-   Version - Version string 
-   
-   This class implements storage and operators for version strings.
+   Version - Versioning system..
 
-   The client is responsible for stripping epochs should it be desired.
+   The versioning system represents how versions are compared, represented
+   and how dependencies are evaluated. As a general rule versioning
+   systems are not compatible unless specifically allowed by the 
+   TestCompatibility query.
+   
+   The versions are stored in a global list of versions, but that is just
+   so that they can be queried when someone does 'apt-get -v'. 
+   pkgSystem provides the proper means to access the VS for the active
+   system.
    
    ##################################################################### */
                                                                        /*}}}*/
-// Header section: pkglib
 #ifndef PKGLIB_VERSION_H
 #define PKGLIB_VERSION_H
 
-#ifdef __GNUG__
-#pragma interface "pkglib/version.h"
-#endif 
-
+#include <apt-pkg/strutl.h>
 #include <string>
 
-class pkgVersion
+#ifndef APT_8_CLEANER_HEADERS
+using std::string;
+#endif
+
+class pkgVersioningSystem
 {
-   string Value;
-   
    public:
-
-   inline operator string () const {return Value;};
-
-   // Assignmnet
-   void operator =(string rhs) {Value = rhs;};
+   // Global list of VS's
+   static pkgVersioningSystem **GlobalList;
+   static unsigned long GlobalListLen;
+   static pkgVersioningSystem *GetVS(const char *Label) APT_PURE;
    
-   // Comparitors. STL will provide the rest
-   bool operator ==(const pkgVersion &rhs) const;
-   bool operator <(const pkgVersion &rhs) const;
+   const char *Label;
    
-   pkgVersion();
-   pkgVersion(string Version) : Value(Version) {};
-};
+   // Compare versions..
+   virtual int DoCmpVersion(const char *A,const char *Aend,
+                         const char *B,const char *Bend) = 0;   
+
+   virtual bool CheckDep(const char *PkgVer,int Op,const char *DepVer) = 0;
+   virtual int DoCmpReleaseVer(const char *A,const char *Aend,
+                              const char *B,const char *Bend) = 0;
+   virtual std::string UpstreamVersion(const char *A) = 0;
+   
+   // See if the given VS is compatible with this one.. 
+   virtual bool TestCompatibility(pkgVersioningSystem const &Against) 
+                {return this == &Against;};
 
-int pkgVersionCompare(const char *A, const char *B);
-int pkgVersionCompare(const char *A, const char *AEnd, const char *B, 
-                  const char *BEnd);
-int pkgVersionCompare(string A,string B);
-bool pkgCheckDep(const char *DepVer,const char *PkgVer,int Op);
+   // Shortcuts
+   APT_MKSTRCMP(CmpVersion,DoCmpVersion);
+   APT_MKSTRCMP(CmpReleaseVer,DoCmpReleaseVer);
+   
+   pkgVersioningSystem();
+   virtual ~pkgVersioningSystem();
+};
 
 #endif