add REAMDE.md

[apt.git] / apt-pkg / deb / deblistparser.cc

diff --git a/apt-pkg/deb/deblistparser.cc b/apt-pkg/deb/deblistparser.cc
index 12c6ab4c9ee7f697abdf5b9474439665029866f4..a1bcfb710432cc44facf49fd394cb231f8b4c319 100644 (file)
--- a/apt-pkg/deb/deblistparser.cc
+++ b/apt-pkg/deb/deblistparser.cc
@@ -21,19 +21,29 @@
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/crc-16.h>
 #include <apt-pkg/md5.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/crc-16.h>
 #include <apt-pkg/md5.h>

+#include <apt-pkg/mmap.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
+#include <apt-pkg/tagfile.h>

 #include <apt-pkg/macros.h>
 
 #include <apt-pkg/macros.h>
 

+#include <stddef.h>
+#include <string.h>
+#include <algorithm>
+#include <string>
+#include <vector>

 #include <ctype.h>
                                                                        /*}}}*/
 
 using std::string;
 
 #include <ctype.h>
                                                                        /*}}}*/
 
 using std::string;
 

-static debListParser::WordList PrioList[] = {{"important",pkgCache::State::Important},
-                       {"required",pkgCache::State::Required},
-                       {"standard",pkgCache::State::Standard},
-                       {"optional",pkgCache::State::Optional},
-                      {"extra",pkgCache::State::Extra},
-                       {}};
+static debListParser::WordList PrioList[] = {
+   {"required",pkgCache::State::Required},
+   {"important",pkgCache::State::Important},
+   {"standard",pkgCache::State::Standard},
+   {"optional",pkgCache::State::Optional},
+   {"extra",pkgCache::State::Extra},
+   {NULL, 0}};

 
 // ListParser::debListParser - Constructor                             /*{{{*/
 // ---------------------------------------------------------------------
 
 // ListParser::debListParser - Constructor                             /*{{{*/
 // ---------------------------------------------------------------------


@@ -94,44 +104,49 @@ string debListParser::Version()
    return Section.FindS("Version");
 }
                                                                        /*}}}*/
    return Section.FindS("Version");
 }
                                                                        /*}}}*/

-// ListParser::NewVersion - Fill in the version structure              /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool debListParser::NewVersion(pkgCache::VerIterator &Ver)
+unsigned char debListParser::ParseMultiArch(bool const showErrors)     /*{{{*/

 {
 {

-   // Parse the section
-   Ver->Section = UniqFindTagWrite("Section");
-
-   // Parse multi-arch
+   unsigned char MA;

    string const MultiArch = Section.FindS("Multi-Arch");
    if (MultiArch.empty() == true)
    string const MultiArch = Section.FindS("Multi-Arch");
    if (MultiArch.empty() == true)

-      Ver->MultiArch = pkgCache::Version::None;
+      MA = pkgCache::Version::None;

    else if (MultiArch == "same") {
    else if (MultiArch == "same") {

-      // Parse multi-arch

       if (ArchitectureAll() == true)
       {
       if (ArchitectureAll() == true)
       {

-        /* Arch all packages can't be Multi-Arch: same */
-        _error->Warning("Architecture: all package '%s' can't be Multi-Arch: same",
-                       Section.FindS("Package").c_str());
-        Ver->MultiArch = pkgCache::Version::None;
+        if (showErrors == true)
+           _error->Warning("Architecture: all package '%s' can't be Multi-Arch: same",
+                 Section.FindS("Package").c_str());
+        MA = pkgCache::Version::None;

       }
       else
       }
       else

-        Ver->MultiArch = pkgCache::Version::Same;
+        MA = pkgCache::Version::Same;

    }
    else if (MultiArch == "foreign")
    }
    else if (MultiArch == "foreign")

-      Ver->MultiArch = pkgCache::Version::Foreign;
+      MA = pkgCache::Version::Foreign;

    else if (MultiArch == "allowed")
    else if (MultiArch == "allowed")

-      Ver->MultiArch = pkgCache::Version::Allowed;
+      MA = pkgCache::Version::Allowed;

    else
    {
    else
    {

-      _error->Warning("Unknown Multi-Arch type '%s' for package '%s'",
-                       MultiArch.c_str(), Section.FindS("Package").c_str());
-      Ver->MultiArch = pkgCache::Version::None;
+      if (showErrors == true)
+        _error->Warning("Unknown Multi-Arch type '%s' for package '%s'",
+              MultiArch.c_str(), Section.FindS("Package").c_str());
+      MA = pkgCache::Version::None;

    }
 
    if (ArchitectureAll() == true)
    }
 
    if (ArchitectureAll() == true)

-      Ver->MultiArch |= pkgCache::Version::All;
+      MA |= pkgCache::Version::All;

 
 

+   return MA;
+}
+                                                                       /*}}}*/
+// ListParser::NewVersion - Fill in the version structure              /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debListParser::NewVersion(pkgCache::VerIterator &Ver)
+{
+   // Parse the section
+   Ver->Section = UniqFindTagWrite("Section");
+   Ver->MultiArch = ParseMultiArch(true);

    // Archive Size
    Ver->Size = Section.FindULL("Size");
    // Unpacked Size (in K)
    // Archive Size
    Ver->Size = Section.FindULL("Size");
    // Unpacked Size (in K)


@@ -218,8 +233,12 @@ MD5SumValue debListParser::Description_md5()
    string const value = Section.FindS("Description-md5");
    if (value.empty() == true)
    {
    string const value = Section.FindS("Description-md5");
    if (value.empty() == true)
    {

+      std::string const desc = Description() + "\n";
+      if (desc == "\n")
+        return MD5SumValue();
+

       MD5Summation md5;
       MD5Summation md5;

-      md5.Add((Description() + "\n").c_str());
+      md5.Add(desc.c_str());

       return md5.Result();
    }
    else if (likely(value.size() == 32))
       return md5.Result();
    }
    else if (likely(value.size() == 32))


@@ -283,7 +302,7 @@ unsigned short debListParser::VersionHash()
                             "Replaces",0};
    unsigned long Result = INIT_FCS;
    char S[1024];
                             "Replaces",0};
    unsigned long Result = INIT_FCS;
    char S[1024];

-   for (const char **I = Sections; *I != 0; I++)
+   for (const char * const *I = Sections; *I != 0; ++I)

    {
       const char *Start;
       const char *End;
    {
       const char *Start;
       const char *End;


@@ -294,13 +313,13 @@ unsigned short debListParser::VersionHash()
          of certain fields. dpkg also has the rather interesting notion of
          reformatting depends operators < -> <= */
       char *J = S;
          of certain fields. dpkg also has the rather interesting notion of
          reformatting depends operators < -> <= */
       char *J = S;

-      for (; Start != End; Start++)
+      for (; Start != End; ++Start)

       {
       {

-        if (isspace(*Start) == 0)
-           *J++ = tolower_ascii(*Start);
-        if (*Start == '<' && Start[1] != '<' && Start[1] != '=')
-           *J++ = '=';
-        if (*Start == '>' && Start[1] != '>' && Start[1] != '=')
+        if (isspace(*Start) != 0)
+           continue;
+        *J++ = tolower_ascii(*Start);
+
+        if ((*Start == '<' || *Start == '>') && Start[1] != *Start && Start[1] != '=')

            *J++ = '=';
       }
 
            *J++ = '=';
       }
 


@@ -349,7 +368,7 @@ bool debListParser::ParseStatus(pkgCache::PkgIterator &Pkg,
                           {"hold",pkgCache::State::Hold},
                           {"deinstall",pkgCache::State::DeInstall},
                           {"purge",pkgCache::State::Purge},
                           {"hold",pkgCache::State::Hold},
                           {"deinstall",pkgCache::State::DeInstall},
                           {"purge",pkgCache::State::Purge},

-                          {}};
+                          {NULL, 0}};

    if (GrabWord(string(Start,I-Start),WantList,Pkg->SelectedState) == false)
       return _error->Error("Malformed 1st word in the Status line");
 
    if (GrabWord(string(Start,I-Start),WantList,Pkg->SelectedState) == false)
       return _error->Error("Malformed 1st word in the Status line");
 


@@ -365,7 +384,7 @@ bool debListParser::ParseStatus(pkgCache::PkgIterator &Pkg,
                           {"reinstreq",pkgCache::State::ReInstReq},
                           {"hold",pkgCache::State::HoldInst},
                           {"hold-reinstreq",pkgCache::State::HoldReInstReq},
                           {"reinstreq",pkgCache::State::ReInstReq},
                           {"hold",pkgCache::State::HoldInst},
                           {"hold-reinstreq",pkgCache::State::HoldReInstReq},

-                          {}};
+                          {NULL, 0}};

    if (GrabWord(string(Start,I-Start),FlagList,Pkg->InstState) == false)
       return _error->Error("Malformed 2nd word in the Status line");
 
    if (GrabWord(string(Start,I-Start),FlagList,Pkg->InstState) == false)
       return _error->Error("Malformed 2nd word in the Status line");
 


@@ -387,7 +406,7 @@ bool debListParser::ParseStatus(pkgCache::PkgIterator &Pkg,
                             {"triggers-pending",pkgCache::State::TriggersPending},
                             {"post-inst-failed",pkgCache::State::HalfConfigured},
                             {"removal-failed",pkgCache::State::HalfInstalled},
                             {"triggers-pending",pkgCache::State::TriggersPending},
                             {"post-inst-failed",pkgCache::State::HalfConfigured},
                             {"removal-failed",pkgCache::State::HalfInstalled},

-                            {}};
+                            {NULL, 0}};

    if (GrabWord(string(Start,I-Start),StatusList,Pkg->CurrentState) == false)
       return _error->Error("Malformed 3rd word in the Status line");
 
    if (GrabWord(string(Start,I-Start),StatusList,Pkg->CurrentState) == false)
       return _error->Error("Malformed 3rd word in the Status line");
 


@@ -469,18 +488,31 @@ const char *debListParser::ConvertRelation(const char *I,unsigned int &Op)
 // ---------------------------------------------------------------------
 /* This parses the dependency elements out of a standard string in place,
    bit by bit. */
 // ---------------------------------------------------------------------
 /* This parses the dependency elements out of a standard string in place,
    bit by bit. */

+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+               std::string &Package,std::string &Ver,unsigned int &Op)
+   { return ParseDepends(Start, Stop, Package, Ver, Op, false, true, false); }
+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+               std::string &Package,std::string &Ver,unsigned int &Op,
+               bool const &ParseArchFlags)
+   { return ParseDepends(Start, Stop, Package, Ver, Op, ParseArchFlags, true, false); }
+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+               std::string &Package,std::string &Ver,unsigned int &Op,
+               bool const &ParseArchFlags, bool const &StripMultiArch)
+   { return ParseDepends(Start, Stop, Package, Ver, Op, ParseArchFlags, StripMultiArch, false); }

 const char *debListParser::ParseDepends(const char *Start,const char *Stop,
                                        string &Package,string &Ver,
                                        unsigned int &Op, bool const &ParseArchFlags,
 const char *debListParser::ParseDepends(const char *Start,const char *Stop,
                                        string &Package,string &Ver,
                                        unsigned int &Op, bool const &ParseArchFlags,

-                                       bool const &StripMultiArch)
+                                       bool const &StripMultiArch,
+                                       bool const &ParseRestrictionsList)

 {
    // Strip off leading space
 {
    // Strip off leading space

-   for (;Start != Stop && isspace(*Start) != 0; Start++);
+   for (;Start != Stop && isspace(*Start) != 0; ++Start);

    
    // Parse off the package name
    const char *I = Start;
    for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
    
    // Parse off the package name
    const char *I = Start;
    for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&

-       *I != ',' && *I != '|' && *I != '[' && *I != ']'; I++);
+       *I != ',' && *I != '|' && *I != '[' && *I != ']' &&
+       *I != '<' && *I != '>'; ++I);

    
    // Malformed, no '('
    if (I != Stop && *I == ')')
    
    // Malformed, no '('
    if (I != Stop && *I == ')')


@@ -597,6 +629,76 @@ const char *debListParser::ParseDepends(const char *Start,const char *Stop,
       for (;I != Stop && isspace(*I) != 0; I++);
    }
 
       for (;I != Stop && isspace(*I) != 0; I++);
    }
 

+   if (ParseRestrictionsList == true)
+   {
+      // Parse a restrictions list
+      if (I != Stop && *I == '<')
+      {
+        ++I;
+        // malformed
+        if (unlikely(I == Stop))
+           return 0;
+
+        std::vector<string> const profiles = APT::Configuration::getBuildProfiles();
+
+        const char *End = I;
+        bool Found = false;
+        bool NegRestriction = false;
+        while (I != Stop)
+        {
+           // look for whitespace or ending '>'
+           for (;End != Stop && !isspace(*End) && *End != '>'; ++End);
+
+           if (unlikely(End == Stop))
+              return 0;
+
+           if (*I == '!')
+           {
+              NegRestriction = true;
+              ++I;
+           }
+
+           std::string restriction(I, End);
+
+           std::string prefix = "profile.";
+           // only support for "profile" prefix, ignore others
+           if (restriction.size() > prefix.size() &&
+                 restriction.substr(0, prefix.size()) == prefix)
+           {
+              // get the name of the profile
+              restriction = restriction.substr(prefix.size());
+
+              if (restriction.empty() == false && profiles.empty() == false &&
+                    std::find(profiles.begin(), profiles.end(), restriction) != profiles.end())
+              {
+                 Found = true;
+                 if (I[-1] != '!')
+                    NegRestriction = false;
+                 // we found a match, so fast-forward to the end of the wildcards
+                 for (; End != Stop && *End != '>'; ++End);
+              }
+           }
+
+           if (*End++ == '>') {
+              I = End;
+              break;
+           }
+
+           I = End;
+           for (;I != Stop && isspace(*I) != 0; I++);
+        }
+
+        if (NegRestriction == true)
+           Found = !Found;
+
+        if (Found == false)
+           Package = ""; /* not for this restriction */
+      }
+
+      // Skip whitespace
+      for (;I != Stop && isspace(*I) != 0; I++);
+   }
+

    if (I != Stop && *I == '|')
       Op |= pkgCache::Dep::Or;
    
    if (I != Stop && *I == '|')
       Op |= pkgCache::Dep::Or;
    


@@ -630,7 +732,7 @@ bool debListParser::ParseDepends(pkgCache::VerIterator &Ver,
       string Version;
       unsigned int Op;
 
       string Version;
       unsigned int Op;
 

-      Start = ParseDepends(Start,Stop,Package,Version,Op,false,!MultiArchEnabled);
+      Start = ParseDepends(Start, Stop, Package, Version, Op, false, false, false);

       if (Start == 0)
         return _error->Error("Problem parsing dependency %s",Tag);
       size_t const found = Package.rfind(':');
       if (Start == 0)
         return _error->Error("Problem parsing dependency %s",Tag);
       size_t const found = Package.rfind(':');


@@ -645,6 +747,8 @@ bool debListParser::ParseDepends(pkgCache::VerIterator &Ver,
              a != Architectures.end(); ++a)
            if (NewDepends(Ver,Package,*a,Version,Op,Type) == false)
               return false;
              a != Architectures.end(); ++a)
            if (NewDepends(Ver,Package,*a,Version,Op,Type) == false)
               return false;

+        if (NewDepends(Ver,Package,"none",Version,Op,Type) == false)
+           return false;

       }
       else if (MultiArchEnabled == true && found != string::npos &&
               strcmp(Package.c_str() + found, ":any") != 0)
       }
       else if (MultiArchEnabled == true && found != string::npos &&
               strcmp(Package.c_str() + found, ":any") != 0)


@@ -658,8 +762,18 @@ bool debListParser::ParseDepends(pkgCache::VerIterator &Ver,
         if (NewDepends(Ver,Package,Arch,Version,Op,Type) == false)
            return false;
       }
         if (NewDepends(Ver,Package,Arch,Version,Op,Type) == false)
            return false;
       }

-      else if (NewDepends(Ver,Package,pkgArch,Version,Op,Type) == false)
-        return false;
+      else
+      {
+        if (NewDepends(Ver,Package,pkgArch,Version,Op,Type) == false)
+           return false;
+        if ((Type == pkgCache::Dep::Conflicts ||
+             Type == pkgCache::Dep::DpkgBreaks ||
+             Type == pkgCache::Dep::Replaces) &&
+            NewDepends(Ver, Package,
+                       (pkgArch != "none") ? "none" : _config->Find("APT::Architecture"),
+                       Version,Op,Type) == false)
+           return false;
+      }

       if (Start == Stop)
         break;
    }
       if (Start == Stop)
         break;
    }


@@ -700,9 +814,7 @@ bool debListParser::ParseProvides(pkgCache::VerIterator &Ver)
       }
    }
 
       }
    }
 

-   if (MultiArchEnabled == false)
-      return true;
-   else if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)
+   if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)

    {
       string const Package = string(Ver.ParentPkg().Name()).append(":").append("any");
       return NewProvidesAllArch(Ver, Package, Ver.VerStr());
    {
       string const Package = string(Ver.ParentPkg().Name()).append(":").append("any");
       return NewProvidesAllArch(Ver, Package, Ver.VerStr());


@@ -743,7 +855,7 @@ bool debListParser::GrabWord(string Word,WordList *List,unsigned char &Out)
                                                                        /*}}}*/
 // ListParser::Step - Move to the next section in the file             /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // ListParser::Step - Move to the next section in the file             /*{{{*/
 // ---------------------------------------------------------------------

-/* This has to be carefull to only process the correct architecture */
+/* This has to be careful to only process the correct architecture */

 bool debListParser::Step()
 {
    iOffset = Tags.Offset();
 bool debListParser::Step()
 {
    iOffset = Tags.Offset();


@@ -753,13 +865,15 @@ bool debListParser::Step()
          drop the whole section. A missing arch tag only happens (in theory)
          inside the Status file, so that is a positive return */
       string const Architecture = Section.FindS("Architecture");
          drop the whole section. A missing arch tag only happens (in theory)
          inside the Status file, so that is a positive return */
       string const Architecture = Section.FindS("Architecture");

-      if (Architecture.empty() == true)
-        return true;

 
       if (Arch.empty() == true || Arch == "any" || MultiArchEnabled == false)
       {
         if (APT::Configuration::checkArchitecture(Architecture) == true)
            return true;
 
       if (Arch.empty() == true || Arch == "any" || MultiArchEnabled == false)
       {
         if (APT::Configuration::checkArchitecture(Architecture) == true)
            return true;

+        /* parse version stanzas without an architecture only in the status file
+           (and as misfortune bycatch flat-archives) */
+        if ((Arch.empty() == true || Arch == "any") && Architecture.empty() == true)
+           return true;

       }
       else
       {
       }
       else
       {


@@ -786,104 +900,28 @@ bool debListParser::LoadReleaseInfo(pkgCache::PkgFileIterator &FileI,
    map_ptrloc const storage = WriteUniqString(component);
    FileI->Component = storage;
 
    map_ptrloc const storage = WriteUniqString(component);
    FileI->Component = storage;
 

-   // FIXME: Code depends on the fact that Release files aren't compressed
-   FILE* release = fdopen(dup(File.Fd()), "r");
-   if (release == NULL)
+   pkgTagFile TagFile(&File, File.Size());
+   pkgTagSection Section;
+   if (_error->PendingError() == true || TagFile.Step(Section) == false)

       return false;
 
       return false;
 

-   char buffer[101];
-   bool gpgClose = false;
-   while (fgets(buffer, sizeof(buffer), release) != NULL)
-   {
-      size_t len = 0;
-
-      // Skip empty lines
-      for (; buffer[len] == '\r' && buffer[len] == '\n'; ++len)
-         /* nothing */
-         ;
-      if (buffer[len] == '\0')
-        continue;
-
-      // only evalute the first GPG section
-      if (strncmp("-----", buffer, 5) == 0)
-      {
-        if (gpgClose == true)
-           break;
-        gpgClose = true;
-        continue;
-      }
-
-      // seperate the tag from the data
-      const char* dataStart = strchr(buffer + len, ':');
-      if (dataStart == NULL)
-        continue;
-      len = dataStart - buffer;
-      for (++dataStart; *dataStart == ' '; ++dataStart)
-         /* nothing */
-         ;
-      const char* dataEnd = (const char*)rawmemchr(dataStart, '\0');
-      // The last char should be a newline, but we can never be sure: #633350
-      const char* lineEnd = dataEnd;
-      for (--lineEnd; *lineEnd == '\r' || *lineEnd == '\n'; --lineEnd)
-         /* nothing */
-         ;
-      ++lineEnd;
-
-      // which datastorage need to be updated
-      enum { Suite, Component, Version, Origin, Codename, Label, None } writeTo = None;
-      if (buffer[0] == ' ')
-        ;
-      #define APT_PARSER_WRITETO(X) else if (strncmp(#X, buffer, len) == 0) writeTo = X;
-      APT_PARSER_WRITETO(Suite)
-      APT_PARSER_WRITETO(Component)
-      APT_PARSER_WRITETO(Version)
-      APT_PARSER_WRITETO(Origin)
-      APT_PARSER_WRITETO(Codename)
-      APT_PARSER_WRITETO(Label)
-      #undef APT_PARSER_WRITETO
-      #define APT_PARSER_FLAGIT(X) else if (strncmp(#X, buffer, len) == 0) \
-        pkgTagSection::FindFlag(FileI->Flags, pkgCache::Flag:: X, dataStart, lineEnd);
-      APT_PARSER_FLAGIT(NotAutomatic)
-      APT_PARSER_FLAGIT(ButAutomaticUpgrades)
-      #undef APT_PARSER_FLAGIT
-
-      // load all data from the line and save it
-      string data;
-      if (writeTo != None)
-        data.append(dataStart, dataEnd);
-      if (sizeof(buffer) - 1 == (dataEnd - buffer))
-      {
-        while (fgets(buffer, sizeof(buffer), release) != NULL)
-        {
-           if (writeTo != None)
-              data.append(buffer);
-           if (strlen(buffer) != sizeof(buffer) - 1)
-              break;
-        }
-      }
-      if (writeTo != None)
-      {
-        // remove spaces and stuff from the end of the data line
-        for (std::string::reverse_iterator s = data.rbegin();
-             s != data.rend(); ++s)
-        {
-           if (*s != '\r' && *s != '\n' && *s != ' ')
-              break;
-           *s = '\0';
-        }
-        map_ptrloc const storage = WriteUniqString(data);
-        switch (writeTo) {
-        case Suite: FileI->Archive = storage; break;
-        case Component: FileI->Component = storage; break;
-        case Version: FileI->Version = storage; break;
-        case Origin: FileI->Origin = storage; break;
-        case Codename: FileI->Codename = storage; break;
-        case Label: FileI->Label = storage; break;
-        case None: break;
-        }
-      }
+   std::string data;
+   #define APT_INRELEASE(TAG, STORE) \
+   data = Section.FindS(TAG); \
+   if (data.empty() == false) \
+   { \
+      map_ptrloc const storage = WriteUniqString(data); \
+      STORE = storage; \

    }
    }

-   fclose(release);
+   APT_INRELEASE("Suite", FileI->Archive)
+   APT_INRELEASE("Component", FileI->Component)
+   APT_INRELEASE("Version", FileI->Version)
+   APT_INRELEASE("Origin", FileI->Origin)
+   APT_INRELEASE("Codename", FileI->Codename)
+   APT_INRELEASE("Label", FileI->Label)
+   #undef APT_INRELEASE
+   Section.FindFlag("NotAutomatic", FileI->Flags, pkgCache::Flag::NotAutomatic);
+   Section.FindFlag("ButAutomaticUpgrades", FileI->Flags, pkgCache::Flag::ButAutomaticUpgrades);

 
    return !_error->PendingError();
 }
 
    return !_error->PendingError();
 }


@@ -900,3 +938,24 @@ unsigned char debListParser::GetPrio(string Str)
    return Out;
 }
                                                                        /*}}}*/
    return Out;
 }
                                                                        /*}}}*/

+#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
+bool debListParser::SameVersion(unsigned short const Hash,             /*{{{*/
+      pkgCache::VerIterator const &Ver)
+{
+   if (pkgCacheGenerator::ListParser::SameVersion(Hash, Ver) == false)
+      return false;
+   // status file has no (Download)Size, but all others are fair game
+   // status file is parsed last, so the first version we encounter is
+   // probably also the version we have downloaded
+   unsigned long long const Size = Section.FindULL("Size");
+   if (Size != 0 && Size != Ver->Size)
+      return false;
+   // available everywhere, but easier to check here than to include in VersionHash
+   unsigned char MultiArch = ParseMultiArch(false);
+   if (MultiArch != Ver->MultiArch)
+      return false;
+   // for all practical proposes (we can check): same version
+   return true;
+}
+                                                                       /*}}}*/
+#endif