apt-pkg/pkgrecords.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgrecords.cc,v 1.2 1998/08/19 06:16:10 jgg 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 #ifdef __GNUG__
  13 #pragma implementation "apt-pkg/pkgrecords.h"
  14 #endif
  15 #include <apt-pkg/pkgrecords.h>
  16 #include <apt-pkg/debrecords.h>
  17 #include <apt-pkg/error.h>
  18 #include <apt-pkg/configuration.h>
  19                                                                         /*}}}*/
  20
  21 // Records::pkgRecords - Constructor                                    /*{{{*/
  22 // ---------------------------------------------------------------------
  23 /* This will create the necessary structures to access the status files */
  24 pkgRecords::pkgRecords(pkgCache &Cache) : Cache(Cache), Files(0)
  25 {
  26    string ListDir = _config->FindDir("Dir::State::lists");
  27
  28    Files = new PkgFile[Cache.HeaderP->PackageFileCount];
  29    for (pkgCache::PkgFileIterator I = Cache.FileBegin();
  30         I.end() == false; I++)
  31    {
  32       // We can not initialize if the cache is out of sync.
  33       if (I.IsOk() == false)
  34       {
  35          _error->Error("Package file %s is out of sync.",I.FileName());
  36          return;
  37       }
  38
  39       // Create the file
  40       Files[I->ID].File = new FileFd(ListDir + I.FileName(),FileFd::ReadOnly);
  41       if (_error->PendingError() == true)
  42          return;
  43
  44       // Create the parser
  45       Files[I->ID].Parse = new debRecordParser(*Files[I->ID].File);
  46       if (_error->PendingError() == true)
  47          return;
  48    }
  49 }
  50                                                                         /*}}}*/
  51 // Records::~pkgRecords - Destructor                                    /*{{{*/
  52 // ---------------------------------------------------------------------
  53 /* */
  54 pkgRecords::~pkgRecords()
  55 {
  56    delete [] Files;
  57 }
  58                                                                         /*}}}*/
  59 // Records::Lookup - Get a parser for the package version file          /*{{{*/
  60 // ---------------------------------------------------------------------
  61 /* */
  62 pkgRecords::Parser &pkgRecords::Lookup(pkgCache::VerFileIterator &Ver)
  63 {
  64    PkgFile &File = Files[Ver.File()->ID];
  65    File.Parse->Jump(Ver);
  66
  67    return *File.Parse;
  68 }
  69                                                                         /*}}}*/
  70 // Records::Pkgfile::~PkgFile - Destructor                              /*{{{*/
  71 // ---------------------------------------------------------------------
  72 /* */
  73 pkgRecords::PkgFile::~PkgFile()
  74 {
  75    delete Parse;
  76    delete File;
  77 }
  78                                                                         /*}}}*/