generalize secure->insecure downgrade protection

[apt.git] / apt-pkg / pkgsystem.cc

diff --git a/apt-pkg/pkgsystem.cc b/apt-pkg/pkgsystem.cc
index f61c140facec1926a4f27a472b1866ac824abdee..b1c6cc1eaa03672769556e6cb884637501ce5d54 100644 (file)
--- a/apt-pkg/pkgsystem.cc
+++ b/apt-pkg/pkgsystem.cc
@@ -12,8 +12,11 @@
 // Include Files                                                       /*{{{*/
 #include<config.h>
 
 // Include Files                                                       /*{{{*/
 #include<config.h>
 

+#include <apt-pkg/debsystem.h>

 #include <apt-pkg/pkgsystem.h>
 #include <apt-pkg/pkgsystem.h>

-#include <apt-pkg/policy.h>
+#include <apt-pkg/macros.h>
+
+#include <map>

 #include <cassert>
 #include <cstring>
                                                                        /*}}}*/
 #include <cassert>
 #include <cstring>
                                                                        /*}}}*/


@@ -23,20 +26,29 @@ static pkgSystem *SysList[10];
 pkgSystem **pkgSystem::GlobalList = SysList;
 unsigned long pkgSystem::GlobalListLen = 0;
 
 pkgSystem **pkgSystem::GlobalList = SysList;
 unsigned long pkgSystem::GlobalListLen = 0;
 

+class APT_HIDDEN pkgSystemPrivate                                      /*{{{*/
+{
+public:
+   typedef decltype(pkgCache::Version::ID) idtype;
+   std::map<idtype,idtype> idmap;
+   pkgSystemPrivate() {}
+};
+                                                                       /*}}}*/

 // System::pkgSystem - Constructor                                     /*{{{*/
 // ---------------------------------------------------------------------
 /* Add it to the global list.. */
 // System::pkgSystem - Constructor                                     /*{{{*/
 // ---------------------------------------------------------------------
 /* Add it to the global list.. */

-pkgSystem::pkgSystem()
+pkgSystem::pkgSystem(char const * const label, pkgVersioningSystem * const vs) :
+   Label(label), VS(vs), d(new pkgSystemPrivate())

 {
    assert(GlobalListLen < sizeof(SysList)/sizeof(*SysList));
    SysList[GlobalListLen] = this;
 {
    assert(GlobalListLen < sizeof(SysList)/sizeof(*SysList));
    SysList[GlobalListLen] = this;

-   GlobalListLen++;
+   ++GlobalListLen;

 }
                                                                        /*}}}*/
 // System::GetSystem - Get the named system                            /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 }
                                                                        /*}}}*/
 // System::GetSystem - Get the named system                            /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-pkgSystem *pkgSystem::GetSystem(const char *Label)
+APT_PURE pkgSystem *pkgSystem::GetSystem(const char *Label)

 {
    for (unsigned I = 0; I != GlobalListLen; I++)
       if (strcmp(SysList[I]->Label,Label) == 0)
 {
    for (unsigned I = 0; I != GlobalListLen; I++)
       if (strcmp(SysList[I]->Label,Label) == 0)


@@ -44,3 +56,34 @@ pkgSystem *pkgSystem::GetSystem(const char *Label)
    return 0;   
 }
                                                                        /*}}}*/
    return 0;   
 }
                                                                        /*}}}*/

+bool pkgSystem::MultiArchSupported() const                             /*{{{*/
+{
+   debSystem const * const deb = dynamic_cast<debSystem const *>(this);
+   if (deb != NULL)
+      return deb->SupportsMultiArch();
+   return true;
+}
+                                                                       /*}}}*/
+std::vector<std::string> pkgSystem::ArchitecturesSupported() const     /*{{{*/
+{
+   debSystem const * const deb = dynamic_cast<debSystem const *>(this);
+   if (deb != NULL)
+      return deb->SupportedArchitectures();
+   return {};
+}
+                                                                       /*}}}*/
+// pkgSystem::Set/GetVersionMapping - for internal/external communcation/*{{{*/
+void pkgSystem::SetVersionMapping(map_id_t const in, map_id_t const out)
+{
+   if (in == out)
+      return;
+   d->idmap.emplace(in, out);
+}
+map_id_t pkgSystem::GetVersionMapping(map_id_t const in) const
+{
+   auto const o = d->idmap.find(in);
+   return (o == d->idmap.end()) ? in : o->second;
+}
+                                                                       /*}}}*/
+
+pkgSystem::~pkgSystem() {}