refactor EDSP classes for better internal reuse

The classes are all marked as hidden, so changing them is no problem ABI
wise and will help with introducing protocols similar to EDSP.
The change has no observeable behavior difference, its just code
juggling.

Git-Dch: Ignore

6 files changed, 145 insertions, 150 deletions

diff --git a/apt-pkg/edsp/edspindexfile.cc b/apt-pkg/edsp/edspindexfile.cc
index 4e0f9c26a..e2863a2cc 100644
--- a/apt-pkg/edsp/edspindexfile.cc
+++ b/apt-pkg/edsp/edspindexfile.cc
@@ -21,31 +21,27 @@
 #include <string>
 									/*}}}*/
 
-// EDSP Index								/*{{{*/
-edspIndex::edspIndex(std::string const &File) : pkgDebianIndexRealFile(File, true), d(NULL)
+// EDSP-like Index							/*{{{*/
+edspLikeIndex::edspLikeIndex(std::string const &File) : pkgDebianIndexRealFile(File, true)
 {
 }
-std::string edspIndex::GetComponent() const
-{
-   return "edsp";
-}
-std::string edspIndex::GetArchitecture() const
+std::string edspLikeIndex::GetArchitecture() const
 {
    return std::string();
 }
-bool edspIndex::HasPackages() const
+bool edspLikeIndex::HasPackages() const
 {
    return true;
 }
-bool edspIndex::Exists() const
+bool edspLikeIndex::Exists() const
 {
    return true;
 }
-uint8_t edspIndex::GetIndexFlags() const
+uint8_t edspLikeIndex::GetIndexFlags() const
 {
    return 0;
 }
-bool edspIndex::OpenListFile(FileFd &Pkg, std::string const &FileName)
+bool edspLikeIndex::OpenListFile(FileFd &Pkg, std::string const &FileName)
 {
    if (FileName.empty() == false && FileName != "/nonexistent/stdin")
       return pkgDebianIndexRealFile::OpenListFile(Pkg, FileName);
@@ -53,6 +49,15 @@ bool edspIndex::OpenListFile(FileFd &Pkg, std::string const &FileName)
       return _error->Error("Problem opening %s",FileName.c_str());
    return true;
 }
+									/*}}}*/
+// EDSP Index								/*{{{*/
+edspIndex::edspIndex(std::string const &File) : edspLikeIndex(File)
+{
+}
+std::string edspIndex::GetComponent() const
+{
+   return "edsp";
+}
 pkgCacheListParser * edspIndex::CreateListParser(FileFd &Pkg)
 {
    if (Pkg.IsOpen() == false)
@@ -84,4 +89,5 @@ const pkgIndexFile::Type *edspIndex::GetType() const
 }
 									/*}}}*/
 
+edspLikeIndex::~edspLikeIndex() {}
 edspIndex::~edspIndex() {}
diff --git a/apt-pkg/edsp/edspindexfile.h b/apt-pkg/edsp/edspindexfile.h
index 4548bff3c..26bd1232b 100644
--- a/apt-pkg/edsp/edspindexfile.h
+++ b/apt-pkg/edsp/edspindexfile.h
@@ -18,23 +18,30 @@
 class OpProgress;
 class pkgCacheGenerator;
 
-class APT_HIDDEN edspIndex : public pkgDebianIndexRealFile
+class APT_HIDDEN edspLikeIndex : public pkgDebianIndexRealFile
 {
-   /** \brief dpointer placeholder (for later in case we need it) */
-   void * const d;
-
 protected:
-   APT_HIDDEN virtual pkgCacheListParser * CreateListParser(FileFd &Pkg) APT_OVERRIDE;
    virtual bool OpenListFile(FileFd &Pkg, std::string const &File) APT_OVERRIDE;
    virtual uint8_t GetIndexFlags() const APT_OVERRIDE;
-   virtual std::string GetComponent() const APT_OVERRIDE;
    virtual std::string GetArchitecture() const APT_OVERRIDE;
-public:
 
-   virtual const Type *GetType() const APT_OVERRIDE APT_CONST;
+public:
    virtual bool Exists() const APT_OVERRIDE;
    virtual bool HasPackages() const APT_OVERRIDE;
 
+   edspLikeIndex(std::string const &File);
+   virtual ~edspLikeIndex();
+};
+
+class APT_HIDDEN edspIndex : public edspLikeIndex
+{
+protected:
+   APT_HIDDEN virtual pkgCacheListParser * CreateListParser(FileFd &Pkg) APT_OVERRIDE;
+   virtual std::string GetComponent() const APT_OVERRIDE;
+
+public:
+   virtual const Type *GetType() const APT_OVERRIDE APT_CONST;
+
    edspIndex(std::string const &File);
    virtual ~edspIndex();
 };
diff --git a/apt-pkg/edsp/edsplistparser.cc b/apt-pkg/edsp/edsplistparser.cc
index f35000e0e..39a6e8a6e 100644
--- a/apt-pkg/edsp/edsplistparser.cc
+++ b/apt-pkg/edsp/edsplistparser.cc
@@ -23,30 +23,22 @@
 
 									/*}}}*/
 
-class edspListParserPrivate						/*{{{*/
-{
-public:
-   FileFd extendedstates;
-   FileFd preferences;
-
-   edspListParserPrivate()
-   {
-      std::string const states = _config->FindFile("Dir::State::extended_states");
-      RemoveFile("edspListParserPrivate", states);
-      extendedstates.Open(states, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive, 0600);
-      std::string const prefs = _config->FindFile("Dir::Etc::preferences");
-      RemoveFile("edspListParserPrivate", prefs);
-      preferences.Open(prefs, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive, 0600);
-   }
-};
-									/*}}}*/
 // ListParser::edspListParser - Constructor				/*{{{*/
-edspListParser::edspListParser(FileFd *File) : debListParser(File), d(new edspListParserPrivate())
+edspLikeListParser::edspLikeListParser(FileFd * const File) : debListParser(File)
+{
+}
+edspListParser::edspListParser(FileFd * const File) : edspLikeListParser(File)
 {
+   std::string const states = _config->FindFile("Dir::State::extended_states");
+   RemoveFile("edspListParserPrivate", states);
+   extendedstates.Open(states, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive, 0600);
+   std::string const prefs = _config->FindFile("Dir::Etc::preferences");
+   RemoveFile("edspListParserPrivate", prefs);
+   preferences.Open(prefs, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive, 0600);
 }
 									/*}}}*/
 // ListParser::NewVersion - Fill in the version structure		/*{{{*/
-bool edspListParser::NewVersion(pkgCache::VerIterator &Ver)
+bool edspLikeListParser::NewVersion(pkgCache::VerIterator &Ver)
 {
    _system->SetVersionMapping(Ver->ID, Section.FindI("APT-ID", Ver->ID));
    return debListParser::NewVersion(Ver);
@@ -55,19 +47,17 @@ bool edspListParser::NewVersion(pkgCache::VerIterator &Ver)
 // ListParser::Description - Return the description string		/*{{{*/
 // ---------------------------------------------------------------------
 /* Sorry, no description for the resolvers… */
-std::vector<std::string> edspListParser::AvailableDescriptionLanguages()
+std::vector<std::string> edspLikeListParser::AvailableDescriptionLanguages()
 {
    return {};
 }
-MD5SumValue edspListParser::Description_md5()
+MD5SumValue edspLikeListParser::Description_md5()
 {
    return MD5SumValue("");
 }
 									/*}}}*/
 // ListParser::VersionHash - Compute a unique hash for this version	/*{{{*/
-// ---------------------------------------------------------------------
-/* */
-unsigned short edspListParser::VersionHash()
+unsigned short edspLikeListParser::VersionHash()
 {
    if (Section.Exists("APT-Hash") == true)
       return Section.FindI("APT-Hash");
@@ -76,6 +66,13 @@ unsigned short edspListParser::VersionHash()
    return 0;
 }
 									/*}}}*/
+// ListParser::LoadReleaseInfo - Load the release information		/*{{{*/
+APT_CONST bool edspLikeListParser::LoadReleaseInfo(pkgCache::RlsFileIterator & /*FileI*/,
+				    FileFd & /*File*/, std::string const &/*component*/)
+{
+   return true;
+}
+									/*}}}*/
 // ListParser::ParseStatus - Parse the status field			/*{{{*/
 // ---------------------------------------------------------------------
 /* The Status: line here is not a normal dpkg one but just one which tells
@@ -102,7 +99,7 @@ bool edspListParser::ParseStatus(pkgCache::PkgIterator &Pkg,
    {
       std::string out;
       strprintf(out, "Package: %s\nArchitecture: %s\nAuto-Installed: 1\n\n", Pkg.Name(), Pkg.Arch());
-      if (d->extendedstates.Write(out.c_str(), out.length()) == false)
+      if (extendedstates.Write(out.c_str(), out.length()) == false)
 	 return false;
    }
 
@@ -111,7 +108,7 @@ bool edspListParser::ParseStatus(pkgCache::PkgIterator &Pkg,
    {
       std::string out;
       strprintf(out, "Package: %s\nPin: version %s\nPin-Priority: 9999\n\n", Pkg.FullName().c_str(), Ver.VerStr());
-      if (d->preferences.Write(out.c_str(), out.length()) == false)
+      if (preferences.Write(out.c_str(), out.length()) == false)
 	 return false;
    }
 
@@ -120,22 +117,13 @@ bool edspListParser::ParseStatus(pkgCache::PkgIterator &Pkg,
    {
       std::string out;
       strprintf(out, "Package: %s\nPin: version %s\nPin-Priority: %d\n\n", Pkg.FullName().c_str(), Ver.VerStr(), pinvalue);
-      if (d->preferences.Write(out.c_str(), out.length()) == false)
+      if (preferences.Write(out.c_str(), out.length()) == false)
 	 return false;
    }
 
    return true;
 }
 									/*}}}*/
-// ListParser::LoadReleaseInfo - Load the release information		/*{{{*/
-APT_CONST bool edspListParser::LoadReleaseInfo(pkgCache::RlsFileIterator & /*FileI*/,
-				    FileFd & /*File*/, std::string const &/*component*/)
-{
-   return true;
-}
-									/*}}}*/
-edspListParser::~edspListParser()					/*{{{*/
-{
-   delete d;
-}
-									/*}}}*/
+
+edspLikeListParser::~edspLikeListParser() {}
+edspListParser::~edspListParser() {}
diff --git a/apt-pkg/edsp/edsplistparser.h b/apt-pkg/edsp/edsplistparser.h
index 691ac83ed..7cd5ab2b3 100644
--- a/apt-pkg/edsp/edsplistparser.h
+++ b/apt-pkg/edsp/edsplistparser.h
@@ -14,6 +14,7 @@
 #include <apt-pkg/deblistparser.h>
 #include <apt-pkg/md5.h>
 #include <apt-pkg/pkgcache.h>
+#include <apt-pkg/fileutl.h>
 
 #include <string>
 
@@ -23,12 +24,8 @@
 #include <apt-pkg/tagfile.h>
 #endif
 
-class FileFd;
-class edspListParserPrivate;
-
-class APT_HIDDEN edspListParser : public debListParser
+class APT_HIDDEN edspLikeListParser : public debListParser
 {
-   edspListParserPrivate * const d;
    public:
    virtual bool NewVersion(pkgCache::VerIterator &Ver) APT_OVERRIDE;
    virtual std::vector<std::string> AvailableDescriptionLanguages() APT_OVERRIDE;
@@ -38,12 +35,20 @@ class APT_HIDDEN edspListParser : public debListParser
    bool LoadReleaseInfo(pkgCache::RlsFileIterator &FileI,FileFd &File,
 			std::string const &section);
 
-   edspListParser(FileFd *File);
-   virtual ~edspListParser();
+   edspLikeListParser(FileFd *File);
+   virtual ~edspLikeListParser();
+};
 
-   protected:
+class APT_HIDDEN edspListParser : public edspLikeListParser
+{
+   FileFd extendedstates;
+   FileFd preferences;
+
+protected:
    virtual bool ParseStatus(pkgCache::PkgIterator &Pkg,pkgCache::VerIterator &Ver) APT_OVERRIDE;
 
+public:
+   edspListParser(FileFd *File);
+   virtual ~edspListParser();
 };
-
 #endif
diff --git a/apt-pkg/edsp/edspsystem.cc b/apt-pkg/edsp/edspsystem.cc
index 0d967863e..c3eea6f10 100644
--- a/apt-pkg/edsp/edspsystem.cc
+++ b/apt-pkg/edsp/edspsystem.cc
@@ -28,63 +28,22 @@
 
 									/*}}}*/
 
-class edspSystemPrivate {
-   std::string tempDir;
-   std::string tempStatesFile;
-   std::string tempPrefsFile;
-
-public:
-   edspSystemPrivate() {}
-
-   void Initialize(Configuration &Cnf)
-   {
-      DeInitialize();
-      Cnf.Set("Dir::State::extended_states", "/dev/null");
-      Cnf.Set("Dir::Etc::preferences", "/dev/null");
-      std::string const tmp = GetTempDir();
-      char tmpname[100];
-      snprintf(tmpname, sizeof(tmpname), "%s/apt-edsp-solver-XXXXXX", tmp.c_str());
-      if (NULL == mkdtemp(tmpname))
-	 return;
-      tempDir = tmpname;
-      tempStatesFile = flCombine(tempDir, "extended_states");
-      Cnf.Set("Dir::State::extended_states", tempStatesFile);
-      tempPrefsFile = flCombine(tempDir, "apt_preferences");
-      Cnf.Set("Dir::Etc::preferences", tempPrefsFile);
-   }
-
-   void DeInitialize()
-   {
-      if (tempDir.empty())
-	 return;
-
-      RemoveFile("DeInitialize", tempStatesFile);
-      RemoveFile("DeInitialize", tempPrefsFile);
-      rmdir(tempDir.c_str());
-   }
-
-   ~edspSystemPrivate() { DeInitialize(); }
-};
-// System::edspSystem - Constructor					/*{{{*/
-edspSystem::edspSystem() : pkgSystem("Debian APT solver interface", &debVS), d(new edspSystemPrivate()), StatusFile(NULL)
+// System::System - Constructor						/*{{{*/
+edspLikeSystem::edspLikeSystem(char const * const Label) : pkgSystem(Label, &debVS)
 {
 }
-									/*}}}*/
-// System::~debSystem - Destructor					/*{{{*/
-edspSystem::~edspSystem()
+edspSystem::edspSystem() : edspLikeSystem("Debian APT solver interface")
 {
-   delete StatusFile;
-   delete d;
 }
 									/*}}}*/
 // System::Lock - Get the lock						/*{{{*/
-bool edspSystem::Lock()
+bool edspLikeSystem::Lock()
 {
    return true;
 }
 									/*}}}*/
 // System::UnLock - Drop a lock						/*{{{*/
-bool edspSystem::UnLock(bool /*NoErrors*/)
+bool edspLikeSystem::UnLock(bool /*NoErrors*/)
 {
    return true;
 }
@@ -93,68 +52,89 @@ bool edspSystem::UnLock(bool /*NoErrors*/)
 // ---------------------------------------------------------------------
 /* we can't use edsp input as input for real installations - just a
    simulation can work, but everything else will fail bigtime */
-pkgPackageManager *edspSystem::CreatePM(pkgDepCache * /*Cache*/) const
+pkgPackageManager *edspLikeSystem::CreatePM(pkgDepCache * /*Cache*/) const
 {
-   return NULL;
+   return nullptr;
 }
 									/*}}}*/
 // System::Initialize - Setup the configuration space..			/*{{{*/
-bool edspSystem::Initialize(Configuration &Cnf)
+bool edspLikeSystem::Initialize(Configuration &Cnf)
 {
-   d->Initialize(Cnf);
    Cnf.Set("Dir::Etc::preferencesparts", "/dev/null");
    Cnf.Set("Dir::State::status","/dev/null");
    Cnf.Set("Dir::State::lists","/dev/null");
-
    Cnf.Set("Debug::NoLocking", "true");
    Cnf.Set("APT::Get::Simulate", "true");
-
-   if (StatusFile) {
-     delete StatusFile;
-     StatusFile = 0;
-   }
+   StatusFile.reset(nullptr);
+   return true;
+}
+bool edspSystem::Initialize(Configuration &Cnf)
+{
+   if (edspLikeSystem::Initialize(Cnf) == false)
+      return false;
+   std::string const tmp = GetTempDir();
+   char tmpname[300];
+   snprintf(tmpname, sizeof(tmpname), "%s/apt-edsp-solver-XXXXXX", tmp.c_str());
+   if (nullptr == mkdtemp(tmpname))
+      return false;
+   tempDir = tmpname;
+   tempStatesFile = flCombine(tempDir, "extended_states");
+   Cnf.Set("Dir::State::extended_states", tempStatesFile);
+   tempPrefsFile = flCombine(tempDir, "apt_preferences");
+   Cnf.Set("Dir::Etc::preferences", tempPrefsFile);
    return true;
 }
 									/*}}}*/
 // System::ArchiveSupported - Is a file format supported		/*{{{*/
-bool edspSystem::ArchiveSupported(const char * /*Type*/)
+bool edspLikeSystem::ArchiveSupported(const char * /*Type*/)
 {
    return false;
 }
 									/*}}}*/
 // System::Score - Never use the EDSP system automatically		/*{{{*/
-signed edspSystem::Score(Configuration const &)
+signed edspLikeSystem::Score(Configuration const &)
 {
    return -1000;
 }
 									/*}}}*/
-bool edspSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List)	/*{{{*/
-{
-   if (StatusFile == 0)
-   {
-      if (_config->Find("edsp::scenario", "") == "/nonexistent/stdin")
-	 StatusFile = new edspIndex("/nonexistent/stdin");
-      else
-	 StatusFile = new edspIndex(_config->FindFile("edsp::scenario"));
-   }
-   List.push_back(StatusFile);
-   return true;
-}
-									/*}}}*/
 // System::FindIndex - Get an index file for status files		/*{{{*/
-bool edspSystem::FindIndex(pkgCache::PkgFileIterator File,
+bool edspLikeSystem::FindIndex(pkgCache::PkgFileIterator File,
 			  pkgIndexFile *&Found) const
 {
    if (StatusFile == 0)
       return false;
    if (StatusFile->FindInCache(*File.Cache()) == File)
    {
-      Found = StatusFile;
+      Found = StatusFile.get();
       return true;
    }
 
    return false;
 }
 									/*}}}*/
+bool edspSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List)	/*{{{*/
+{
+   if (StatusFile == nullptr)
+   {
+      if (_config->Find("edsp::scenario", "") == "/nonexistent/stdin")
+	 StatusFile.reset(new edspIndex("/nonexistent/stdin"));
+      else
+	 StatusFile.reset(new edspIndex(_config->FindFile("edsp::scenario")));
+   }
+   List.push_back(StatusFile.get());
+   return true;
+}
+									/*}}}*/
+
+edspLikeSystem::~edspLikeSystem() {}
+edspSystem::~edspSystem()
+{
+   if (tempDir.empty())
+      return;
+
+   RemoveFile("~edspSystem", tempStatesFile);
+   RemoveFile("~edspSystem", tempPrefsFile);
+   rmdir(tempDir.c_str());
+}
 
 APT_HIDDEN edspSystem edspSys;
diff --git a/apt-pkg/edsp/edspsystem.h b/apt-pkg/edsp/edspsystem.h
index aa4298f01..2c429c3d6 100644
--- a/apt-pkg/edsp/edspsystem.h
+++ b/apt-pkg/edsp/edspsystem.h
@@ -14,6 +14,7 @@
 #include <apt-pkg/cacheiterators.h>
 #include <apt-pkg/pkgcache.h>
 
+#include <memory>
 #include <vector>
 
 #include <apt-pkg/macros.h>
@@ -22,28 +23,36 @@ class Configuration;
 class pkgDepCache;
 class pkgIndexFile;
 class pkgPackageManager;
-class edspIndex;
 
-class edspSystemPrivate;
-class APT_HIDDEN edspSystem : public pkgSystem
+class APT_HIDDEN edspLikeSystem : public pkgSystem
 {
-   /** \brief dpointer placeholder (for later in case we need it) */
-   edspSystemPrivate * const d;
-
-   edspIndex *StatusFile;
-
-   public:
+protected:
+   std::unique_ptr<pkgIndexFile> StatusFile;
 
+public:
    virtual bool Lock() APT_OVERRIDE APT_CONST;
    virtual bool UnLock(bool NoErrors = false) APT_OVERRIDE APT_CONST;
    virtual pkgPackageManager *CreatePM(pkgDepCache *Cache) const APT_OVERRIDE APT_CONST;
    virtual bool Initialize(Configuration &Cnf) APT_OVERRIDE;
    virtual bool ArchiveSupported(const char *Type) APT_OVERRIDE APT_CONST;
    virtual signed Score(Configuration const &Cnf) APT_OVERRIDE;
-   virtual bool AddStatusFiles(std::vector<pkgIndexFile *> &List) APT_OVERRIDE;
    virtual bool FindIndex(pkgCache::PkgFileIterator File,
 			  pkgIndexFile *&Found) const APT_OVERRIDE;
 
+   edspLikeSystem(char const * const Label);
+   virtual ~edspLikeSystem();
+};
+
+class APT_HIDDEN edspSystem : public edspLikeSystem
+{
+   std::string tempDir;
+   std::string tempStatesFile;
+   std::string tempPrefsFile;
+
+public:
+   virtual bool Initialize(Configuration &Cnf) APT_OVERRIDE;
+   virtual bool AddStatusFiles(std::vector<pkgIndexFile *> &List) APT_OVERRIDE;
+
    edspSystem();
    virtual ~edspSystem();
 };