Reorderd error handling

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

diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc
index 3e01e771de19e9edbdb1d7e9faadaff2aff98cdb..5cf54b9aa257796f8c319bfaee3e96fc1cac363e 100644 (file)
--- a/apt-pkg/pkgcache.cc
+++ b/apt-pkg/pkgcache.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: pkgcache.cc,v 1.20 1998/12/07 07:26:19 jgg Exp $
+// $Id: pkgcache.cc,v 1.30 1999/12/05 05:37:45 jgg Exp $
 /* ######################################################################
    
    Package Cache - Accessor code for the cache
@@ -27,6 +27,7 @@
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/version.h>
 #include <apt-pkg/error.h>
+#include <apt-pkg/strutl.h>
 #include <system.h>
 
 #include <string>
@@ -43,8 +44,8 @@ pkgCache::Header::Header()
    
    /* Whenever the structures change the major version should be bumped,
       whenever the generator changes the minor version should be bumped. */
-   MajorVersion = 2;
-   MinorVersion = 2;
+   MajorVersion = 3;
+   MinorVersion = 5;
    Dirty = true;
    
    HeaderSz = sizeof(pkgCache::Header);
@@ -59,6 +60,8 @@ pkgCache::Header::Header()
    VersionCount = 0;
    DependsCount = 0;
    PackageFileCount = 0;
+   VerFileCount = 0;
+   ProvidesCount = 0;
    MaxVerFileSize = 0;
    
    FileList = 0;
@@ -130,23 +133,20 @@ bool pkgCache::ReMap()
 /* This is used to generate the hash entries for the HashTable. With my
    package list from bo this function gets 94% table usage on a 512 item
    table (480 used items) */
-unsigned long pkgCache::sHash(string Str)
+unsigned long pkgCache::sHash(string Str) const
 {
    unsigned long Hash = 0;
    for (const char *I = Str.begin(); I != Str.end(); I++)
-      Hash += *I * ((Str.end() - I + 1));
-   Header H;
-   return Hash % _count(H.HashTable);
+      Hash = 5*Hash + tolower(*I);
+   return Hash % _count(HeaderP->HashTable);
 }
 
-unsigned long pkgCache::sHash(const char *Str)
+unsigned long pkgCache::sHash(const char *Str) const
 {
    unsigned long Hash = 0;
-   const char *End = Str + strlen(Str);
-   for (const char *I = Str; I != End; I++)
-      Hash += *I * ((End - I + 1));
-   Header H;
-   return Hash % _count(H.HashTable);
+   for (const char *I = Str; *I != 0; I++)
+      Hash = 5*Hash + tolower(*I);
+   return Hash % _count(HeaderP->HashTable);
 }
 
                                                                        /*}}}*/
@@ -160,7 +160,7 @@ pkgCache::PkgIterator pkgCache::FindPkg(string Name)
    for (; Pkg != PkgP; Pkg = PkgP + Pkg->NextPackage)
    {
       if (Pkg->Name != 0 && StrP[Pkg->Name] == Name[0] &&
-         StrP + Pkg->Name == Name)
+         stringcasecmp(Name.begin(),Name.end(),StrP + Pkg->Name) == 0)
         return PkgIterator(*this,Pkg);
    }
    return PkgIterator(*this,0);
@@ -177,6 +177,43 @@ const char *pkgCache::Priority(unsigned char Prio)
    return 0;
 }
                                                                        /*}}}*/
+// Cache::GetCandidateVer - Returns the Candidate install version      /*{{{*/
+// ---------------------------------------------------------------------
+/* The default just returns the highest available version that is not
+   a source and automatic */
+pkgCache::VerIterator pkgCache::GetCandidateVer(PkgIterator Pkg,
+                                               bool AllowCurrent)
+{
+   /* Not source/not automatic versions cannot be a candidate version 
+      unless they are already installed */
+   VerIterator Last(*this,0);
+   
+   for (VerIterator I = Pkg.VersionList(); I.end() == false; I++)
+   {
+      if (Pkg.CurrentVer() == I && AllowCurrent == true)
+        return I;
+      
+      for (VerFileIterator J = I.FileList(); J.end() == false; J++)
+      {
+        if ((J.File()->Flags & Flag::NotSource) != 0)
+           continue;
+
+        /* Stash the highest version of a not-automatic source, we use it
+           if there is nothing better */
+        if ((J.File()->Flags & Flag::NotAutomatic) != 0)
+        {
+           if (Last.end() == true)
+              Last = I;
+           continue;
+        }
+        
+        return I;
+      }   
+   }
+   
+   return Last;
+}
+                                                                       /*}}}*/
 
 // Bases for iterator classes                                          /*{{{*/
 void pkgCache::VerIterator::_dummy() {}
@@ -213,8 +250,7 @@ pkgCache::PkgIterator::OkState pkgCache::PkgIterator::State() const
        Pkg->CurrentState == pkgCache::State::HalfConfigured)
       return NeedsConfigure;
    
-   if (Pkg->CurrentState == pkgCache::State::UnInstalled ||
-       Pkg->CurrentState == pkgCache::State::HalfInstalled ||
+   if (Pkg->CurrentState == pkgCache::State::HalfInstalled ||
        Pkg->InstState != pkgCache::State::Ok)
       return NeedsUnpack;
       
@@ -436,6 +472,36 @@ const char *pkgCache::VerIterator::PriorityType()
    return "";
 }
                                                                        /*}}}*/
+// VerIterator::Automatic - Check if this version is 'automatic'       /*{{{*/
+// ---------------------------------------------------------------------
+/* This checks to see if any of the versions files are not NotAutomatic. 
+   True if this version is selectable for automatic installation. */
+bool pkgCache::VerIterator::Automatic() const
+{
+   VerFileIterator Files = FileList();
+   for (; Files.end() == false; Files++)
+      if ((Files.File()->Flags & pkgCache::Flag::NotAutomatic) != pkgCache::Flag::NotAutomatic)
+        return true;
+   return false;
+}
+                                                                       /*}}}*/
+// VerIterator::NewestFile - Return the newest file version relation   /*{{{*/
+// ---------------------------------------------------------------------
+/* This looks at the version numbers associated with all of the sources
+   this version is in and returns the highest.*/
+pkgCache::VerFileIterator pkgCache::VerIterator::NewestFile() const
+{
+   VerFileIterator Files = FileList();
+   VerFileIterator Highest = Files;
+   for (; Files.end() == false; Files++)
+   {
+      if (pkgVersionCompare(Files.File().Version(),Highest.File().Version()) > 0)
+        Highest = Files;
+   }
+   
+   return Highest;
+}
+                                                                       /*}}}*/
 // PkgFileIterator::IsOk - Checks if the cache is in sync with the file        /*{{{*/
 // ---------------------------------------------------------------------
 /* This stats the file and compares its stats with the ones that were