apt-pkg/srcrecords.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: srcrecords.cc,v 1.3 1999/10/18 04:15:24 jgg Exp $
   4 /* ######################################################################
   5
   6    Source Package Records - Allows access to source package records
   7
   8    Parses and allows access to the list of source records and searching by
   9    source name on that list.
  10
  11    ##################################################################### */
  12                                                                         /*}}}*/
  13 // Include Files                                                        /*{{{*/
  14 #ifdef __GNUG__
  15 #pragma implementation "apt-pkg/srcrecords.h"
  16 #endif
  17
  18 #include <apt-pkg/srcrecords.h>
  19 #include <apt-pkg/error.h>
  20 #include <apt-pkg/configuration.h>
  21 #include <apt-pkg/strutl.h>
  22 #include <apt-pkg/debsrcrecords.h>
  23                                                                         /*}}}*/
  24
  25 // SrcRecords::pkgSrcRecords - Constructor                              /*{{{*/
  26 // ---------------------------------------------------------------------
  27 /* Open all the source index files */
  28 pkgSrcRecords::pkgSrcRecords(pkgSourceList &List) : Files(0), Current(0)
  29 {
  30    pkgSourceList::const_iterator I = List.begin();
  31
  32    // Count how many items we will need
  33    unsigned int Count = 0;
  34    for (; I != List.end(); I++)
  35       if (I->Type == pkgSourceList::Item::DebSrc)
  36          Count++;
  37
  38    // Doesnt work without any source index files
  39    if (Count == 0)
  40    {
  41       _error->Error("Sorry, you must put some 'source' uris"
  42                     " in your sources.list");
  43       return;
  44    }
  45
  46    Files = new Parser *[Count+1];
  47    memset(Files,0,sizeof(*Files)*(Count+1));
  48
  49    // Create the parser objects
  50    Count = 0;
  51    string Dir = _config->FindDir("Dir::State::lists");
  52    for (I = List.begin(); I != List.end(); I++)
  53    {
  54       if (I->Type != pkgSourceList::Item::DebSrc)
  55          continue;
  56
  57       // Open the file
  58       FileFd *FD = new FileFd(Dir + URItoFileName(I->PackagesURI()),
  59                               FileFd::ReadOnly);
  60       if (_error->PendingError() == true)
  61       {
  62          delete FD;
  63          return;
  64       }
  65
  66       Files[Count] = new debSrcRecordParser(FD,I);
  67       Count++;
  68    }
  69
  70    Restart();
  71 }
  72                                                                         /*}}}*/
  73 // SrcRecords::~pkgSrcRecords - Destructor                              /*{{{*/
  74 // ---------------------------------------------------------------------
  75 /* */
  76 pkgSrcRecords::~pkgSrcRecords()
  77 {
  78    if (Files == 0)
  79       return;
  80
  81    // Blow away all the parser objects
  82    for (unsigned int Count = 0; Files[Count] != 0; Count++)
  83       delete Files[Count];
  84 }
  85                                                                         /*}}}*/
  86 // SrcRecords::Restart - Restart the search                             /*{{{*/
  87 // ---------------------------------------------------------------------
  88 /* Return all of the parsers to their starting position */
  89 bool pkgSrcRecords::Restart()
  90 {
  91    Current = Files;
  92    for (Parser **I = Files; *I != 0; I++)
  93       (*I)->Restart();
  94
  95    return true;
  96 }
  97                                                                         /*}}}*/
  98 // SrcRecords::Find - Find the first source package with the given name /*{{{*/
  99 // ---------------------------------------------------------------------
 100 /* This searches on both source package names and output binary names and
 101    returns the first found. A 'cursor' like system is used to allow this
 102    function to be called multiple times to get successive entries */
 103 pkgSrcRecords::Parser *pkgSrcRecords::Find(const char *Package,bool SrcOnly)
 104 {
 105    if (*Current == 0)
 106       return 0;
 107
 108    while (true)
 109    {
 110       // Step to the next record, possibly switching files
 111       while ((*Current)->Step() == false)
 112       {
 113          if (_error->PendingError() == true)
 114             return 0;
 115          Current++;
 116          if (*Current == 0)
 117             return 0;
 118       }
 119
 120       // IO error somehow
 121       if (_error->PendingError() == true)
 122          return 0;
 123
 124       // Source name hit
 125       if ((*Current)->Package() == Package)
 126          return *Current;
 127
 128       if (SrcOnly == true)
 129          continue;
 130
 131       // Check for a binary hit
 132       const char **I = (*Current)->Binaries();
 133       for (; I != 0 && *I != 0; I++)
 134          if (strcmp(Package,*I) == 0)
 135             return *Current;
 136    }
 137 }
 138                                                                         /*}}}*/
 139