apt: apt-pkg/version.h Source File

apt 3.0.1 commandline package manager

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