store source name and version in binary cache

Accessing the package records to acquire this information is pretty
costly, so that information wasn't used so far in many places. The most
noticeable user by far is EDSP at the moment, but there are ideas to
change that which this commit tries to enable.

7 files changed, 89 insertions, 53 deletions

diff --git a/apt-pkg/cacheiterators.h b/apt-pkg/cacheiterators.h
index 12a03eb07..b0c02d4a2 100644
--- a/apt-pkg/cacheiterators.h
+++ b/apt-pkg/cacheiterators.h
@@ -215,6 +215,12 @@ class pkgCache::VerIterator : public Iterator<Version, VerIterator> {
 	// Accessors
 	inline const char *VerStr() const {return S->VerStr == 0?0:Owner->StrP + S->VerStr;}
 	inline const char *Section() const {return S->Section == 0?0:Owner->StrP + S->Section;}
+	/** \brief source package name this version comes from
+	   Always contains the name, even if it is the same as the binary name */
+	inline const char *SourcePkgName() const {return Owner->StrP + S->SourcePkgName;}
+	/** \brief source version this version comes from
+	   Always contains the version string, even if it is the same as the binary version */
+	inline const char *SourceVerStr() const {return Owner->StrP + S->SourceVerStr;}
 	inline const char *Arch() const {
 		if ((S->MultiArch & pkgCache::Version::All) == pkgCache::Version::All)
 			return "all";
diff --git a/apt-pkg/deb/deblistparser.cc b/apt-pkg/deb/deblistparser.cc
index 9919d2036..103b126de 100644
--- a/apt-pkg/deb/deblistparser.cc
+++ b/apt-pkg/deb/deblistparser.cc
@@ -141,6 +141,57 @@ bool debListParser::NewVersion(pkgCache::VerIterator &Ver)
       map_stringitem_t const idx = StoreString(pkgCacheGenerator::SECTION, Start, Stop - Start);
       Ver->Section = idx;
    }
+   // Parse the source package name
+   pkgCache::GrpIterator const G = Ver.ParentPkg().Group();
+   Ver->SourcePkgName = G->Name;
+   Ver->SourceVerStr = Ver->VerStr;
+   if (Section.Find("Source",Start,Stop) == true)
+   {
+      const char * const Space = (const char * const) memchr(Start, ' ', Stop - Start);
+      pkgCache::VerIterator V;
+
+      if (Space != NULL)
+      {
+	 Stop = Space;
+	 const char * const Open = (const char * const) memchr(Space, '(', Stop - Space);
+	 if (likely(Open != NULL))
+	 {
+	    const char * const Close = (const char * const) memchr(Open, ')', Stop - Open);
+	    if (likely(Close != NULL))
+	    {
+	       std::string const version(Open + 1, (Close - Open) - 1);
+	       if (version != Ver.VerStr())
+	       {
+		  map_stringitem_t const idx = StoreString(pkgCacheGenerator::VERSION, version);
+		  Ver->SourceVerStr = idx;
+	       }
+	    }
+	 }
+      }
+
+      std::string const pkgname(Start, Stop - Start);
+      if (pkgname != G.Name())
+      {
+	 for (pkgCache::PkgIterator P = G.PackageList(); P.end() == false; P = G.NextPkg(P))
+	 {
+	    for (V = P.VersionList(); V.end() == false; ++V)
+	    {
+	       if (pkgname == V.SourcePkgName())
+	       {
+		  Ver->SourcePkgName = V->SourcePkgName;
+		  break;
+	       }
+	    }
+	    if (V.end() == false)
+	       break;
+	 }
+	 if (V.end() == true)
+	 {
+	    map_stringitem_t const idx = StoreString(pkgCacheGenerator::PKGNAME, pkgname);
+	    Ver->SourcePkgName = idx;
+	 }
+      }
+   }
 
    Ver->MultiArch = ParseMultiArch(true);
    // Archive Size
diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index a5c05d5ea..95fae9a28 100644
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -1754,11 +1754,6 @@ void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
    if (Ver.end() == true)
       return;
    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
-   pkgRecords Recs(Cache);
-   pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
-   srcpkgname = Parse.SourcePkg();
-   if(srcpkgname.empty())
-      srcpkgname = pkgname;
 
    // if the file exists already, we check:
    // - if it was reported already (touched by apport). 
@@ -1809,7 +1804,7 @@ void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
    time_t now = time(NULL);
    fprintf(report, "Date: %s" , ctime(&now));
    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
-   fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
+   fprintf(report, "SourcePackage: %s\n", Ver.SourcePkgName());
    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
 
    // ensure that the log is flushed
diff --git a/apt-pkg/edsp.cc b/apt-pkg/edsp.cc
index 0d0418e06..2ba914b16 100644
--- a/apt-pkg/edsp.cc
+++ b/apt-pkg/edsp.cc
@@ -95,12 +95,8 @@ bool EDSP::WriteLimitedScenario(pkgDepCache &Cache, FILE* output,
 void EDSP::WriteScenarioVersion(pkgDepCache &Cache, FILE* output, pkgCache::PkgIterator const &Pkg,
 				pkgCache::VerIterator const &Ver)
 {
-   pkgRecords Recs(Cache);
-   pkgRecords::Parser &rec = Recs.Lookup(Ver.FileList());
-   string srcpkg = rec.SourcePkg().empty() ? Pkg.Name() : rec.SourcePkg();
-
    fprintf(output, "Package: %s\n", Pkg.Name());
-   fprintf(output, "Source: %s\n", srcpkg.c_str());
+   fprintf(output, "Source: %s\n", Ver.SourcePkgName());
    fprintf(output, "Architecture: %s\n", Ver.Arch());
    fprintf(output, "Version: %s\n", Ver.VerStr());
    if (Pkg.CurrentVer() == Ver)
diff --git a/apt-pkg/pkgcache.h b/apt-pkg/pkgcache.h
index 4284a318c..6a89eabd7 100644
--- a/apt-pkg/pkgcache.h
+++ b/apt-pkg/pkgcache.h
@@ -510,6 +510,12 @@ struct pkgCache::Version
    map_stringitem_t VerStr;
    /** \brief section this version is filled in */
    map_stringitem_t Section;
+   /** \brief source package name this version comes from
+      Always contains the name, even if it is the same as the binary name */
+   map_stringitem_t SourcePkgName;
+   /** \brief source version this version comes from
+      Always contains the version string, even if it is the same as the binary version */
+   map_stringitem_t SourceVerStr;
 
    /** \brief Multi-Arch capabilities of a package version */
    enum VerMultiArch { None = 0, /*!< is the default and doesn't trigger special behaviour */
diff --git a/cmdline/apt-cache.cc b/cmdline/apt-cache.cc
index 5a5dde088..0f4f7e1ce 100644
--- a/cmdline/apt-cache.cc
+++ b/cmdline/apt-cache.cc
@@ -389,6 +389,8 @@ static bool Stats(CommandLine &)
 	    stritems.insert(V->VerStr);
 	 if (V->Section != 0)
 	    stritems.insert(V->Section);
+	 stritems.insert(V->SourcePkgName);
+	 stritems.insert(V->SourceVerStr);
 	 for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; ++D)
 	 {
 	    if (D->Version != 0)
diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
index aed1beb4d..a5cafc39d 100644
--- a/cmdline/apt-get.cc
+++ b/cmdline/apt-get.cc
@@ -195,7 +195,7 @@ static std::string GetReleaseForSourceRecord(pkgSourceList *SrcList,
 // FindSrc - Find a source record					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-static pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
+static pkgSrcRecords::Parser *FindSrc(const char *Name,
 			       pkgSrcRecords &SrcRecs,string &Src,
 			       CacheFile &CacheFile)
 {
@@ -303,16 +303,10 @@ static pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
 		  (VF.File().Archive() != 0 && VF.File().Archive() == RelTag) ||
 		  (VF.File().Codename() != 0 && VF.File().Codename() == RelTag)) 
 	       {
-		  pkgRecords::Parser &Parse = Recs.Lookup(VF);
-		  Src = Parse.SourcePkg();
-		  // no SourcePkg name, so it is the "binary" name
-		  if (Src.empty() == true)
-		     Src = TmpSrc;
+		  Src = Ver.SourcePkgName();
 		  // the Version we have is possibly fuzzy or includes binUploads,
-		  // so we use the Version of the SourcePkg (empty if same as package)
-		  VerTag = Parse.SourceVer();
-		  if (VerTag.empty() == true)
-		     VerTag = Ver.VerStr();
+		  // so we use the Version of the SourcePkg
+		  VerTag = Ver.SourceVerStr();
 		  break;
 	       }
 	    }
@@ -343,10 +337,10 @@ static pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
 	 pkgCache::VerIterator Ver = Cache->GetCandidateVer(Pkg);
 	 if (Ver.end() == false) 
 	 {
-	    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
-	    Src = Parse.SourcePkg();
-	    if (VerTag.empty() == true)
-	       VerTag = Parse.SourceVer();
+	    if (strcmp(Ver.SourcePkgName(),Ver.ParentPkg().Name()) != 0)
+	       Src = Ver.SourcePkgName();
+	    if (VerTag.empty() == true && strcmp(Ver.SourceVerStr(),Ver.VerStr()) != 0)
+	       VerTag = Ver.SourceVerStr();
 	 }
       }
    }
@@ -731,7 +725,6 @@ static bool DoSource(CommandLine &CmdL)
    pkgSourceList *List = Cache.GetSourceList();
    
    // Create the text record parsers
-   pkgRecords Recs(Cache);
    pkgSrcRecords SrcRecs(*List);
    if (_error->PendingError() == true)
       return false;
@@ -760,7 +753,7 @@ static bool DoSource(CommandLine &CmdL)
    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
    {
       string Src;
-      pkgSrcRecords::Parser *Last = FindSrc(*I,Recs,SrcRecs,Src,Cache);
+      pkgSrcRecords::Parser *Last = FindSrc(*I,SrcRecs,Src,Cache);
       
       if (Last == 0) {
 	 return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
@@ -1037,7 +1030,6 @@ static bool DoBuildDep(CommandLine &CmdL)
    pkgSourceList *List = Cache.GetSourceList();
    
    // Create the text record parsers
-   pkgRecords Recs(Cache);
    pkgSrcRecords SrcRecs(*List);
    if (_error->PendingError() == true)
       return false;
@@ -1090,7 +1082,7 @@ static bool DoBuildDep(CommandLine &CmdL)
             Last = Type->CreateSrcPkgParser(*I);
       } else {
          // normal case, search the cache for the source file
-         Last = FindSrc(*I,Recs,SrcRecs,Src,Cache);
+         Last = FindSrc(*I,SrcRecs,Src,Cache);
       }
 
       if (Last == 0)
@@ -1441,21 +1433,15 @@ static bool DoBuildDep(CommandLine &CmdL)
  * pool/ next to the deb itself)
  * Example return: "pool/main/a/apt/apt_0.8.8ubuntu3" 
  */
-static string GetChangelogPath(CacheFile &Cache, 
-                        pkgCache::PkgIterator Pkg,
+static string GetChangelogPath(CacheFile &Cache,
                         pkgCache::VerIterator Ver)
 {
-   string path;
-
    pkgRecords Recs(Cache);
    pkgRecords::Parser &rec=Recs.Lookup(Ver.FileList());
-   string srcpkg = rec.SourcePkg().empty() ? Pkg.Name() : rec.SourcePkg();
-   string ver = Ver.VerStr();
-   // if there is a source version it always wins
-   if (rec.SourceVer() != "")
-      ver = rec.SourceVer();
-   path = flNotFile(rec.FileName());
-   path += srcpkg + "_" + StripEpoch(ver);
+   string path = flNotFile(rec.FileName());
+   path.append(Ver.SourcePkgName());
+   path.append("_");
+   path.append(StripEpoch(Ver.SourceVerStr()));
    return path;
 }
 									/*}}}*/
@@ -1469,7 +1455,6 @@ static string GetChangelogPath(CacheFile &Cache,
  *  http://packages.medibuntu.org/pool/non-free/m/mplayer/mplayer_1.0~rc4~try1.dsfg1-1ubuntu1+medibuntu1.changelog
  */
 static bool GuessThirdPartyChangelogUri(CacheFile &Cache, 
-                                 pkgCache::PkgIterator Pkg,
                                  pkgCache::VerIterator Ver,
                                  string &out_uri)
 {
@@ -1484,7 +1469,7 @@ static bool GuessThirdPartyChangelogUri(CacheFile &Cache,
       return false;
 
    // get archive uri for the binary deb
-   string path_without_dot_changelog = GetChangelogPath(Cache, Pkg, Ver);
+   string path_without_dot_changelog = GetChangelogPath(Cache, Ver);
    out_uri = index->ArchiveURI(path_without_dot_changelog + ".changelog");
 
    // now strip away the filename and add srcpkg_srcver.changelog
@@ -1502,25 +1487,20 @@ static bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher,
  * GuessThirdPartyChangelogUri for details how)
  */
 {
-   string path;
-   string descr;
-   string server;
-   string changelog_uri;
-
-   // data structures we need
-   pkgCache::PkgIterator Pkg = Ver.ParentPkg();
-
    // make the server root configurable
-   server = _config->Find("Apt::Changelogs::Server",
+   string const server = _config->Find("Apt::Changelogs::Server",
                           "http://packages.debian.org/changelogs");
-   path = GetChangelogPath(CacheFile, Pkg, Ver);
+   string const path = GetChangelogPath(CacheFile, Ver);
+   string changelog_uri;
    strprintf(changelog_uri, "%s/%s/changelog", server.c_str(), path.c_str());
    if (_config->FindB("APT::Get::Print-URIs", false) == true)
    {
       std::cout << '\'' << changelog_uri << '\'' << std::endl;
       return true;
    }
+   pkgCache::PkgIterator const Pkg = Ver.ParentPkg();
 
+   string descr;
    strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), changelog_uri.c_str());
    // queue it
    new pkgAcqFile(&Fetcher, changelog_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
@@ -1531,7 +1511,7 @@ static bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher,
    if (!FileExists(targetfile))
    {
       string third_party_uri;
-      if (GuessThirdPartyChangelogUri(CacheFile, Pkg, Ver, third_party_uri))
+      if (GuessThirdPartyChangelogUri(CacheFile, Ver, third_party_uri))
       {
          strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), third_party_uri.c_str());
          new pkgAcqFile(&Fetcher, third_party_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);