apt-pkg/pkgrecords.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgrecords.cc,v 1.8 2003/09/02 04:52:16 mdz Exp $
   4 /* ######################################################################
   5
   6    Package Records - Allows access to complete package description records
   7                      directly from the file.
   8
   9    ##################################################################### */
  10                                                                         /*}}}*/
  11 // Include Files                                                        /*{{{*/
  12 #include <apt-pkg/pkgrecords.h>
  13 #include <apt-pkg/indexfile.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16
  17 #include <apti18n.h>
  18                                                                         /*}}}*/
  19
  20 // Records::pkgRecords - Constructor                                    /*{{{*/
  21 // ---------------------------------------------------------------------
  22 /* This will create the necessary structures to access the status files */
  23 pkgRecords::pkgRecords(pkgCache &Cache) : Cache(Cache), Files(0)
  24 {
  25    Files = new Parser *[Cache.HeaderP->PackageFileCount];
  26    memset(Files,0,sizeof(*Files)*Cache.HeaderP->PackageFileCount);
  27
  28    for (pkgCache::PkgFileIterator I = Cache.FileBegin();
  29         I.end() == false; I++)
  30    {
  31       const pkgIndexFile::Type *Type = pkgIndexFile::Type::GetType(I.IndexType());
  32       if (Type == 0)
  33       {
  34          _error->Error(_("Index file type '%s' is not supported"),I.IndexType());
  35          return;
  36       }
  37
  38       Files[I->ID] = Type->CreatePkgParser(I);
  39       if (Files[I->ID] == 0)
  40          return;
  41    }
  42 }
  43                                                                         /*}}}*/
  44 // Records::~pkgRecords - Destructor                                    /*{{{*/
  45 // ---------------------------------------------------------------------
  46 /* */
  47 pkgRecords::~pkgRecords()
  48 {
  49    for (unsigned I = 0; I != Cache.HeaderP->PackageFileCount; I++)
  50       delete Files[I];
  51    delete [] Files;
  52 }
  53                                                                         /*}}}*/
  54 // Records::Lookup - Get a parser for the package version file          /*{{{*/
  55 // ---------------------------------------------------------------------
  56 /* */
  57 pkgRecords::Parser &pkgRecords::Lookup(pkgCache::VerFileIterator const &Ver)
  58 {
  59    Files[Ver.File()->ID]->Jump(Ver);
  60    return *Files[Ver.File()->ID];
  61 }
  62                                                                         /*}}}*/
  63 // Records::Lookup - Get a parser for the package description file      /*{{{*/
  64 // ---------------------------------------------------------------------
  65 /* */
  66 pkgRecords::Parser &pkgRecords::Lookup(pkgCache::DescFileIterator const &Desc)
  67 {
  68    Files[Desc.File()->ID]->Jump(Desc);
  69    return *Files[Desc.File()->ID];
  70 }
  71                                                                         /*}}}*/