From 6c139d6e362f04a1582e8a8f511f8aeab031fecf Mon Sep 17 00:00:00 2001
From: Arch Librarian <arch@canonical.com>
Date: Mon, 20 Sep 2004 16:50:41 +0000
Subject: Sync Author: jgg Date: 1998-07-07 04:17:00 GMT Sync

---
 apt-pkg/orderlist.h | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 apt-pkg/orderlist.h

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

diff --git a/apt-pkg/orderlist.h b/apt-pkg/orderlist.h
new file mode 100644
index 000000000..0dc8a5038
--- /dev/null
+++ b/apt-pkg/orderlist.h
@@ -0,0 +1,123 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: orderlist.h,v 1.1 1998/07/07 04:17:01 jgg Exp $
+/* ######################################################################
+
+   Order List - Represents and Manipulates an ordered list of packages.
+   
+   A list of packages can be ordered by a number of conflicting criteria
+   each given a specific priority. Each package also has a set of flags
+   indicating some usefull things about it that are derived in the 
+   course of sorting. The pkgPackageManager class uses this class for
+   all of it's installation ordering needs.
+   
+   ##################################################################### */
+									/*}}}*/
+// Header section: pkglib
+#ifndef PKGLIB_ORDERLIST_H
+#define PKGLIB_ORDERLIST_H
+
+#ifdef __GNUG__
+#pragma interface "pkglib/orderlist.h"
+#endif 
+
+#include <pkglib/pkgcache.h>
+
+class pkgDepCache;
+class pkgOrderList
+{
+   protected:
+
+   pkgDepCache &Cache;
+   
+   // Bring some usefull types into the local scope
+   typedef pkgCache::PkgIterator PkgIterator;
+   typedef pkgCache::VerIterator VerIterator;
+   typedef pkgCache::DepIterator DepIterator;
+   typedef pkgCache::PrvIterator PrvIterator;
+   typedef pkgCache::Package Package;
+   typedef pkgCache::Version Version;
+   typedef bool (pkgOrderList::*DepFunc)(DepIterator D);
+
+   // These are the currently selected ordering functions
+   DepFunc Primary;
+   DepFunc Secondary;
+   DepFunc RevDepends;
+   DepFunc Remove;
+
+   // State
+   Package **End;
+   Package **List;
+   DepIterator Loops[20];
+   int LoopCount;
+   int Depth;
+   unsigned char *Flags;
+   
+   // Main visit function
+   bool VisitNode(PkgIterator Pkg);
+   bool VisitDeps(DepFunc F,PkgIterator Pkg);
+   bool VisitRDeps(DepFunc F,PkgIterator Pkg);
+   bool VisitRProvides(DepFunc F,VerIterator Ver);
+   bool VisitProvides(DepIterator Pkg);
+   
+   // Dependency checking functions.
+   bool DepUnPackCrit(DepIterator D);
+   bool DepUnPackPreD(DepIterator D);
+   bool DepUnPackPre(DepIterator D);
+   bool DepUnPackDep(DepIterator D);
+   bool DepConfigure(DepIterator D);
+   bool DepRemove(DepIterator D);
+   
+   // Analysis helpers
+   bool AddLoop(DepIterator D);
+   bool CheckDep(DepIterator D);
+   bool DoRun();
+   
+   // For pre sorting
+   static pkgOrderList *Me;
+   static int OrderCompareA(const void *a, const void *b);
+   static int OrderCompareB(const void *a, const void *b);
+   int FileCmp(PkgIterator A,PkgIterator B);
+   
+   public:
+
+   typedef Package **iterator;
+   
+   // State flags
+   enum Flags {Added = (1 << 0), AddPending = (1 << 1),
+               Immediate = (1 << 2), Loop = (1 << 3),
+               UnPacked = (1 << 4), Configured = (1 << 5),
+               Removed = (1 << 6),
+               InList = (1 << 7),
+               States = (UnPacked | Configured | Removed)};
+
+   // Flag manipulators
+   inline bool IsFlag(PkgIterator Pkg,unsigned long F) {return (Flags[Pkg->ID] & F) == F;};
+   inline bool IsFlag(Package *Pkg,unsigned long F) {return (Flags[Pkg->ID] & F) == F;};
+   void Flag(PkgIterator Pkg,unsigned long State, unsigned long F) {Flags[Pkg->ID] = (Flags[Pkg->ID] & (~F)) | State;};
+   inline void Flag(PkgIterator Pkg,unsigned long F) {Flags[Pkg->ID] |= F;};
+   inline void Flag(Package *Pkg,unsigned long F) {Flags[Pkg->ID] |= F;};
+   inline bool IsNow(PkgIterator Pkg) {return (Flags[Pkg->ID] & States) == 0;};
+   void WipeFlags(unsigned long F);
+   
+   // Accessors
+   inline iterator begin() {return List;};
+   inline iterator end() {return End;};
+   inline void push_back(Package *Pkg) {*(End++) = Pkg;};
+   inline void push_back(PkgIterator Pkg) {*(End++) = Pkg;};
+   inline void pop_back() {End--;};
+   inline bool empty() {return End == List;};
+   inline unsigned int size() {return End - List;};
+   
+   // Ordering modes
+   bool OrderCritical();
+   bool OrderUnpack();
+   bool OrderConfigure();
+
+   int Score(PkgIterator Pkg);
+
+   pkgOrderList(pkgDepCache &Cache);
+   ~pkgOrderList();
+};
+
+#endif
-- 
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