From b2e465d6d32d2dc884f58b94acb7e35f671a87fe Mon Sep 17 00:00:00 2001
From: Arch Librarian <arch@canonical.com>
Date: Mon, 20 Sep 2004 16:56:32 +0000
Subject: Join with aliencode Author: jgg Date: 2001-02-20 07:03:16 GMT Join
 with aliencode

---
 apt-pkg/policy.h | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 apt-pkg/policy.h

(limited to 'apt-pkg/policy.h')

diff --git a/apt-pkg/policy.h b/apt-pkg/policy.h
new file mode 100644
index 000000000..f89916202
--- /dev/null
+++ b/apt-pkg/policy.h
@@ -0,0 +1,83 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: policy.h,v 1.2 2001/02/20 07:03:17 jgg Exp $
+/* ######################################################################
+
+   Package Version Policy implementation
+
+   This implements the more advanced 'Version 4' APT policy engine. The
+   standard 'Version 0' engine is included inside the DepCache which is
+   it's historical location.
+   
+   The V4 engine allows the user to completly control all aspects of
+   version selection. There are three primary means to choose a version
+    * Selection by version match
+    * Selection by Release file match
+    * Selection by origin server
+   
+   Each package may be 'pinned' with a single criteria, which will ultimately
+   result in the selection of a single version, or no version, for each
+   package.
+   
+   Furthermore, the default selection can be influenced by specifying
+   the ordering of package files. The order is derived by reading the
+   package file preferences and assigning a priority to each package 
+   file.
+   
+   A special flag may be set to indicate if no version should be returned
+   if no matching versions are found, otherwise the default matching
+   rules are used to locate a hit.
+   
+   ##################################################################### */
+									/*}}}*/
+#ifndef PKGLIB_POLICY_H
+#define PKGLIB_POLICY_H
+
+#ifdef __GNUG__
+#pragma interface "apt-pkg/policy.h"
+#endif
+
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/versionmatch.h>
+#include <vector>
+
+class pkgPolicy : public pkgDepCache::Policy
+{
+   struct Pin
+   {
+      pkgVersionMatch::MatchType Type;
+      string Data;
+      signed short Priority;
+      Pin() : Type(pkgVersionMatch::None), Priority(0) {};
+   };
+
+   struct PkgPin : Pin
+   {
+      string Pkg;
+   };
+   
+   protected:
+   
+   Pin *Pins;
+   signed short *PFPriority;
+   vector<Pin> Defaults;
+   vector<PkgPin> Unmatched;
+   pkgCache *Cache;
+   bool StatusOverride;
+   
+   public:
+
+   void CreatePin(pkgVersionMatch::MatchType Type,string Pkg,
+		  string Data,signed short Priority);
+   
+   virtual pkgCache::VerIterator GetCandidateVer(pkgCache::PkgIterator Pkg);
+   virtual bool IsImportantDep(pkgCache::DepIterator Dep) {return pkgDepCache::Policy::IsImportantDep(Dep);};
+   bool InitDefaults();
+   
+   pkgPolicy(pkgCache *Owner);
+   virtual ~pkgPolicy() {delete [] PFPriority; delete [] Pins;};
+};
+
+bool ReadPinFile(pkgPolicy &Plcy,string File = "");
+
+#endif
-- 
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