apt-pkg/version.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: version.h,v 1.8 2001/05/27 05:55:27 jgg Exp $
   4 /* ######################################################################
   5
   6    Version - Versioning system..
   7
   8    The versioning system represents how versions are compared, represented
   9    and how dependencies are evaluated. As a general rule versioning
  10    systems are not compatible unless specifically allowed by the
  11    TestCompatibility query.
  12
  13    The versions are stored in a global list of versions, but that is just
  14    so that they can be queried when someone does 'apt-get -v'.
  15    pkgSystem provides the proper means to access the VS for the active
  16    system.
  17
  18    ##################################################################### */
  19                                                                         /*}}}*/
  20 #ifndef PKGLIB_VERSION_H
  21 #define PKGLIB_VERSION_H
  22
  23 #include <apt-pkg/strutl.h>
  24 #include <string>
  25
  26 #ifndef APT_8_CLEANER_HEADERS
  27 using std::string;
  28 #endif
  29
  30 class pkgVersioningSystem
  31 {
  32    public:
  33    // Global list of VS's
  34    static pkgVersioningSystem **GlobalList;
  35    static unsigned long GlobalListLen;
  36    static pkgVersioningSystem *GetVS(const char *Label) APT_PURE;
  37
  38    const char *Label;
  39
  40    // Compare versions..
  41    virtual int DoCmpVersion(const char *A,const char *Aend,
  42                           const char *B,const char *Bend) = 0;
  43
  44    virtual bool CheckDep(const char *PkgVer,int Op,const char *DepVer) = 0;
  45    virtual int DoCmpReleaseVer(const char *A,const char *Aend,
  46                                const char *B,const char *Bend) = 0;
  47    virtual std::string UpstreamVersion(const char *A) = 0;
  48
  49    // See if the given VS is compatible with this one..
  50    virtual bool TestCompatibility(pkgVersioningSystem const &Against)
  51                 {return this == &Against;};
  52
  53    // Shortcuts
  54    APT_MKSTRCMP(CmpVersion,DoCmpVersion);
  55    APT_MKSTRCMP(CmpReleaseVer,DoCmpReleaseVer);
  56
  57    pkgVersioningSystem();
  58    virtual ~pkgVersioningSystem();
  59 };
  60
  61 #endif