apt-pkg/version.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: version.h,v 1.7 2001/05/14 05:58:33 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 using std::string;
  30
  31 class pkgVersioningSystem
  32 {
  33    public:
  34    // Global list of VS's
  35    static pkgVersioningSystem **GlobalList;
  36    static unsigned long GlobalListLen;
  37    static pkgVersioningSystem *GetVS(const char *Label);
  38
  39    const char *Label;
  40
  41    // Compare versions..
  42    virtual int DoCmpVersion(const char *A,const char *Aend,
  43                           const char *B,const char *Bend) = 0;
  44
  45    virtual bool CheckDep(const char *PkgVer,int Op,const char *DepVer) = 0;
  46    virtual int DoCmpReleaseVer(const char *A,const char *Aend,
  47                                const char *B,const char *Bend) = 0;
  48    virtual string UpstreamVersion(const char *A) = 0;
  49
  50    // See if the given VS is compatible with this one..
  51    virtual bool TestCompatibility(pkgVersioningSystem const &Against)
  52                 {return this == &Against;};
  53
  54    // Shortcuts
  55    inline int CmpVersion(const char *A, const char *B)
  56    {
  57       return DoCmpVersion(A,A+strlen(A),B,B+strlen(B));
  58    };
  59    inline int CmpVersion(string A,string B)
  60    {
  61       return DoCmpVersion(A.c_str(),A.c_str()+A.length(),B.c_str(),B.c_str()+B.length());
  62    };
  63    inline int CmpReleaseVer(const char *A, const char *B)
  64    {
  65       return DoCmpReleaseVer(A,A+strlen(A),B,B+strlen(B));
  66    };
  67    inline int CmpReleaseVer(string A,string B)
  68    {
  69       return DoCmpReleaseVer(A.c_str(),A.c_str()+A.length(),B.c_str(),B.c_str()+B.length());
  70    };
  71
  72    pkgVersioningSystem();
  73    virtual ~pkgVersioningSystem() {};
  74 };
  75
  76 #ifdef APT_COMPATIBILITY
  77 #include <apt-pkg/debversion.h>
  78 #endif
  79
  80 #endif