apt-pkg/version.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: version.h,v 1.6 2001/02/20 07:03:17 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 #ifdef __GNUG__
  24 #pragma interface "apt-pkg/version.h"
  25 #endif
  26
  27 #include <string>
  28
  29 class pkgVersioningSystem
  30 {
  31    public:
  32    // Global list of VS's
  33    static pkgVersioningSystem **GlobalList;
  34    static unsigned long GlobalListLen;
  35    static pkgVersioningSystem *GetVS(const char *Label);
  36
  37    const char *Label;
  38
  39    // Compare versions..
  40    virtual int DoCmpVersion(const char *A,const char *Aend,
  41                           const char *B,const char *Bend) = 0;
  42    virtual bool CheckDep(const char *PkgVer,int Op,const char *DepVer) = 0;
  43    virtual int DoCmpReleaseVer(const char *A,const char *Aend,
  44                                const char *B,const char *Bend) = 0;
  45    virtual string UpstreamVersion(const char *A) = 0;
  46
  47    // See if the given VS is compatible with this one..
  48    virtual bool TestCompatibility(pkgVersioningSystem const &Against)
  49                 {return this == &Against;};
  50
  51    // Shortcuts
  52    inline int CmpVersion(const char *A, const char *B)
  53    {
  54       return DoCmpVersion(A,A+strlen(A),B,B+strlen(B));
  55    };
  56    inline int CmpVersion(string A,string B)
  57    {
  58       return DoCmpVersion(A.begin(),A.end(),B.begin(),B.end());
  59    };
  60    inline int CmpReleaseVer(const char *A, const char *B)
  61    {
  62       return DoCmpReleaseVer(A,A+strlen(A),B,B+strlen(B));
  63    };
  64    inline int CmpReleaseVer(string A,string B)
  65    {
  66       return DoCmpReleaseVer(A.begin(),A.end(),B.begin(),B.end());
  67    };
  68
  69    pkgVersioningSystem();
  70    virtual ~pkgVersioningSystem() {};
  71 };
  72
  73 #ifdef APT_COMPATIBILITY
  74 #include <apt-pkg/debversion.h>
  75 #endif
  76
  77 #endif