add a first round of stuff needed for talking between APT and solvers

based on a very early draft for EDSP by Stefano

APT can now write a scenario as well as load most stuff from it.

1 files changed, 130 insertions, 0 deletions

diff --git a/apt-pkg/edsp/edspwriter.cc b/apt-pkg/edsp/edspwriter.cc
new file mode 100644
index 000000000..38d0d82c5
--- /dev/null
+++ b/apt-pkg/edsp/edspwriter.cc
@@ -0,0 +1,130 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+   Set of methods to help writing and reading everything needed for EDSP
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <apt-pkg/edspwriter.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/version.h>
+#include <apt-pkg/policy.h>
+
+#include <apti18n.h>
+#include <limits>
+
+#include <stdio.h>
+									/*}}}*/
+
+// edspWriter::WriteUniverse - to the given file descriptor		/*{{{*/
+bool edspWriter::WriteUniverse(pkgDepCache &Cache, FILE* output)
+{
+   // we could use pkgCache::DepType and ::Priority, but these would be lokalized strings…
+   const char * const PrioMap[] = {0, "important", "required", "standard",
+				   "optional", "extra"};
+   const char * const DepMap[] = {"", "Depends", "PreDepends", "Suggests",
+				  "Recommends" , "Conflicts", "Replaces",
+				  "Obsoletes", "Breaks", "Enhances"};
+
+   for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg)
+   {
+      for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
+      {
+	 fprintf(output, "Package: %s\n", Pkg.Name());
+	 fprintf(output, "Architecture: %s\n", Ver.Arch());
+	 fprintf(output, "Version: %s\n", Ver.VerStr());
+	 if (Pkg.CurrentVer() == Ver)
+	    fprintf(output, "Installed: yes\n");
+	 if (Pkg->SelectedState == pkgCache::State::Hold)
+	    fprintf(output, "Hold: yes\n");
+	 fprintf(output, "APT-ID: %u\n", Ver->ID);
+	 fprintf(output, "Priority: %s\n", PrioMap[Ver->Priority]);
+	 if ((Pkg->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
+	    fprintf(output, "Essential: yes\n");
+	 fprintf(output, "Section: %s\n", Ver.Section());
+	 if (Ver->MultiArch == pkgCache::Version::Allowed || Ver->MultiArch == pkgCache::Version::AllAllowed)
+	    fprintf(output, "Multi-Arch: allowed\n");
+	 else if (Ver->MultiArch == pkgCache::Version::Foreign || Ver->MultiArch == pkgCache::Version::AllForeign)
+	    fprintf(output, "Multi-Arch: foreign\n");
+	 else if (Ver->MultiArch == pkgCache::Version::Same)
+	    fprintf(output, "Multi-Arch: same\n");
+	 signed short Pin = std::numeric_limits<signed short>::min();
+	 for (pkgCache::VerFileIterator File = Ver.FileList(); File.end() == false; ++File) {
+	    signed short const p = Cache.GetPolicy().GetPriority(File.File());
+	    if (Pin < p)
+	       Pin = p;
+	 }
+	 fprintf(output, "APT-Pin: %d\n", Pin);
+	 if (Cache.GetCandidateVer(Pkg) == Ver)
+	    fprintf(output, "APT-Candidate: yes\n");
+	 if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
+	    fprintf(output, "APT-Automatic: yes\n");
+	 std::string dependencies[pkgCache::Dep::Enhances + 1];
+	 bool orGroup = false;
+	 for (pkgCache::DepIterator Dep = Ver.DependsList(); Dep.end() == false; ++Dep)
+	 {
+	    // Ignore implicit dependencies for multiarch here
+	    if (strcmp(Pkg.Arch(), Dep.TargetPkg().Arch()) != 0)
+	       continue;
+	    if (orGroup == false)
+	       dependencies[Dep->Type].append(", ");
+	    dependencies[Dep->Type].append(Dep.TargetPkg().Name());
+	    if (Dep->Version != 0)
+	       dependencies[Dep->Type].append(" (").append(pkgCache::CompTypeDeb(Dep->CompareOp)).append(" ").append(Dep.TargetVer()).append(")");
+	    if ((Dep->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or)
+	    {
+	       dependencies[Dep->Type].append(" | ");
+	       orGroup = true;
+	    }
+	    else
+	       orGroup = false;
+	 }
+	 for (int i = 1; i < pkgCache::Dep::Enhances + 1; ++i)
+	    if (dependencies[i].empty() == false)
+	       fprintf(output, "%s: %s\n", DepMap[i], dependencies[i].c_str()+2);
+	 string provides;
+	 for (pkgCache::PrvIterator Prv = Ver.ProvidesList(); Prv.end() == false; ++Prv)
+	 {
+	    // Ignore implicit provides for multiarch here
+	    if (strcmp(Pkg.Arch(), Prv.ParentPkg().Arch()) != 0 || strcmp(Pkg.Name(),Prv.Name()) == 0)
+	       continue;
+	    provides.append(", ").append(Prv.Name());
+	 }
+	 if (provides.empty() == false)
+	    fprintf(output, "Provides: %s\n", provides.c_str()+2);
+
+
+	 fprintf(output, "\n");
+      }
+   }
+   return true;
+}
+									/*}}}*/
+// edspWriter::WriteRequest - to the given file descriptor		/*{{{*/
+bool edspWriter::WriteRequest(pkgDepCache &Cache, FILE* output)
+{
+   string del, inst, upgrade;
+   for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg)
+   {
+      string* req;
+      if (Cache[Pkg].Delete() == true)
+	 req = &del;
+      else if (Cache[Pkg].NewInstall() == true)
+	 req = &inst;
+      else if (Cache[Pkg].Upgrade() == true)
+	 req = &upgrade;
+      else
+	 continue;
+      req->append(", ").append(Pkg.FullName());
+   }
+   if (del.empty() == false)
+      fprintf(output, "Remove: %s\n", del.c_str()+2);
+   if (inst.empty() == false)
+      fprintf(output, "Install: %s\n", inst.c_str()+2);
+   if (upgrade.empty() == false)
+      fprintf(output, "Upgrade: %s\n", upgrade.c_str()+2);
+
+   return true;
+}
+									/*}}}*/