merged r1811..1815 from lp:~donkult/apt/experimental

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

diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc
index cde0920e64d60841fd05933d84cebbb6ccc55973..98576fc915bd4a47fe6c824c3ae27242521db650 100644 (file)
--- a/apt-pkg/policy.cc
+++ b/apt-pkg/policy.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: policy.cc,v 1.6 2001/04/29 05:13:51 jgg Exp $
+// $Id: policy.cc,v 1.10 2003/08/12 00:17:37 mdz Exp $
 /* ######################################################################
 
    Package Version Policy implementation
@@ -23,9 +23,6 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/policy.h"
-#endif
 #include <apt-pkg/policy.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/tagfile.h>
@@ -34,8 +31,13 @@
 #include <apt-pkg/sptr.h>
     
 #include <apti18n.h>
+
+#include <iostream>
+#include <sstream>
                                                                        /*}}}*/
 
+using namespace std;
+
 // Policy::Init - Startup and bind to a cache                          /*{{{*/
 // ---------------------------------------------------------------------
 /* Set the defaults for operation. The default mode with no loaded policy
@@ -117,7 +119,7 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg)
    // Look for a package pin and evaluate it.
    signed Max = GetPriority(Pkg);
    pkgCache::VerIterator Pref = GetMatch(Pkg);
-      
+
    /* Falling through to the default version.. Setting Max to zero
       effectively excludes everything <= 0 which are the non-automatic
       priorities.. The status file is given a prio of 100 which will exclude
@@ -164,7 +166,6 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg)
            break;
       }            
    }
-   
    return Pref;
 }
                                                                        /*}}}*/
@@ -177,24 +178,24 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg)
 void pkgPolicy::CreatePin(pkgVersionMatch::MatchType Type,string Name,
                          string Data,signed short Priority)
 {
-   pkgCache::PkgIterator Pkg = Cache->FindPkg(Name);
    Pin *P = 0;
    
    if (Name.empty() == true)
-      P = Defaults.insert(Defaults.end());
+      P = &*Defaults.insert(Defaults.end(),PkgPin());
    else
    {
       // Get a spot to put the pin
+      pkgCache::PkgIterator Pkg = Cache->FindPkg(Name);
       if (Pkg.end() == true)
       {
         // Check the unmatched table
         for (vector<PkgPin>::iterator I = Unmatched.begin(); 
              I != Unmatched.end() && P == 0; I++)
            if (I->Pkg == Name)
-              P = I;
+              P = &*I;
         
         if (P == 0)
-           P = Unmatched.insert(Unmatched.end());      
+           P = &*Unmatched.insert(Unmatched.end(),PkgPin());      
       }
       else
       {
@@ -217,7 +218,7 @@ pkgCache::VerIterator pkgPolicy::GetMatch(pkgCache::PkgIterator Pkg)
    if (PPkg.Type != pkgVersionMatch::None)
    {
       pkgVersionMatch Match(PPkg.Data,PPkg.Type);
-        return Match.Find(Pkg);
+      return Match.Find(Pkg);
    }
    return pkgCache::VerIterator(*Pkg.Cache());
 }
@@ -238,7 +239,21 @@ signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg)
    return 0;
 }
                                                                        /*}}}*/
-
+// PreferenceSection class - Overriding the default TrimRecord method  /*{{{*/
+// ---------------------------------------------------------------------
+/* The preference file is a user generated file so the parser should
+   therefore be a bit more friendly by allowing comments and new lines
+   all over the place rather than forcing a special format */
+class PreferenceSection : public pkgTagSection
+{
+   void TrimRecord(bool BeforeRecord, const char* &End)
+   {
+      for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++)
+        if (Stop[0] == '#')
+           Stop = (const char*) memchr(Stop,'\n',End-Stop);
+   }
+};
+                                                                       /*}}}*/
 // ReadPinFile - Load the pin file into a Policy                       /*{{{*/
 // ---------------------------------------------------------------------
 /* I'd like to see the preferences file store more than just pin information
@@ -258,7 +273,7 @@ bool ReadPinFile(pkgPolicy &Plcy,string File)
    if (_error->PendingError() == true)
       return false;
    
-   pkgTagSection Tags;
+   PreferenceSection Tags;
    while (TF.Step(Tags) == true)
    {
       string Name = Tags.FindS("Package");
@@ -290,8 +305,20 @@ bool ReadPinFile(pkgPolicy &Plcy,string File)
       }
       for (; Word != End && isspace(*Word) != 0; Word++);
 
-      Plcy.CreatePin(Type,Name,string(Word,End),
-                    Tags.FindI("Pin-Priority"));
+      short int priority = Tags.FindI("Pin-Priority", 0);
+      if (priority == 0)
+      {
+         _error->Warning(_("No priority (or zero) specified for pin"));
+         continue;
+      }
+
+      istringstream s(Name);
+      string pkg;
+      while(!s.eof())
+      {
+        s >> pkg;
+         Plcy.CreatePin(Type, pkg, string(Word,End),priority);
+      };
    }
 
    Plcy.InitDefaults();