apt-pkg/indexrecords.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: indexrecords.cc,v 1.1.2.4 2003/12/30 02:11:43 mdz Exp $
   4                                                                         /*}}}*/
   5 // Include Files                                                        /*{{{*/
   6 #ifdef __GNUG__
   7 #pragma implementation "apt-pkg/indexrecords.h"
   8 #endif
   9 #include <apt-pkg/indexrecords.h>
  10 #include <apt-pkg/tagfile.h>
  11 #include <apt-pkg/error.h>
  12 #include <apt-pkg/strutl.h>
  13 #include <apti18n.h>
  14 #include <sys/stat.h>
  15
  16 string indexRecords::GetDist() const
  17 {
  18    return this->Dist;
  19 }
  20
  21 bool indexRecords::CheckDist(const string MaybeDist) const
  22 {
  23    return (this->Dist == MaybeDist
  24            || this->Suite == MaybeDist);
  25 }
  26
  27 string indexRecords::GetExpectedDist() const
  28 {
  29    return this->ExpectedDist;
  30 }
  31
  32 const indexRecords::checkSum *indexRecords::Lookup(const string MetaKey)
  33 {
  34    return Entries[MetaKey];
  35 }
  36
  37 bool indexRecords::Load(const string Filename)
  38 {
  39    FileFd Fd(Filename, FileFd::ReadOnly);
  40    pkgTagFile TagFile(&Fd, Fd.Size() + 256); // XXX
  41    if (_error->PendingError() == true)
  42    {
  43       ErrorText = _(("Unable to parse Release file " + Filename).c_str());
  44       return false;
  45    }
  46
  47    pkgTagSection Section;
  48    if (TagFile.Step(Section) == false)
  49    {
  50       ErrorText = _(("No sections in Release file " + Filename).c_str());
  51       return false;
  52    }
  53
  54    const char *Start, *End;
  55    Section.Get (Start, End, 0);
  56    Suite = Section.FindS("Suite");
  57    Dist = Section.FindS("Codename");
  58 //    if (Dist.empty())
  59 //    {
  60 //       ErrorText = _(("No Codename entry in Release file " + Filename).c_str());
  61 //       return false;
  62 //    }
  63    if (!Section.Find("MD5Sum", Start, End))
  64    {
  65       ErrorText = _(("No MD5Sum entry in Release file " + Filename).c_str());
  66       return false;
  67    }
  68    string Name;
  69    string MD5Hash;
  70    size_t Size;
  71    while (Start < End)
  72    {
  73       if (!parseSumData(Start, End, Name, MD5Hash, Size))
  74          return false;
  75       indexRecords::checkSum *Sum = new indexRecords::checkSum;
  76       Sum->MetaKeyFilename = Name;
  77       Sum->MD5Hash = MD5Hash;
  78       Sum->Size = Size;
  79       Entries[Name] = Sum;
  80    }
  81
  82    string Strdate = Section.FindS("Date"); // FIXME: verify this somehow?
  83    return true;
  84 }
  85
  86 bool indexRecords::parseSumData(const char *&Start, const char *End,
  87                                    string &Name, string &Hash, size_t &Size)
  88 {
  89    Name = "";
  90    Hash = "";
  91    Size = 0;
  92    /* Skip over the first blank */
  93    while ((*Start == '\t' || *Start == ' ' || *Start == '\n')
  94           && Start < End)
  95       Start++;
  96    if (Start >= End)
  97       return false;
  98
  99    /* Move EntryEnd to the end of the first entry (the hash) */
 100    const char *EntryEnd = Start;
 101    while ((*EntryEnd != '\t' && *EntryEnd != ' ')
 102           && EntryEnd < End)
 103       EntryEnd++;
 104    if (EntryEnd == End)
 105       return false;
 106
 107    Hash.append(Start, EntryEnd-Start);
 108
 109    /* Skip over intermediate blanks */
 110    Start = EntryEnd;
 111    while (*Start == '\t' || *Start == ' ')
 112       Start++;
 113    if (Start >= End)
 114       return false;
 115
 116    EntryEnd = Start;
 117    /* Find the end of the second entry (the size) */
 118    while ((*EntryEnd != '\t' && *EntryEnd != ' ' )
 119           && EntryEnd < End)
 120       EntryEnd++;
 121    if (EntryEnd == End)
 122       return false;
 123
 124    Size = strtol (Start, NULL, 10);
 125
 126    /* Skip over intermediate blanks */
 127    Start = EntryEnd;
 128    while (*Start == '\t' || *Start == ' ')
 129       Start++;
 130    if (Start >= End)
 131       return false;
 132
 133    EntryEnd = Start;
 134    /* Find the end of the third entry (the filename) */
 135    while ((*EntryEnd != '\t' && *EntryEnd != ' ' && *EntryEnd != '\n')
 136           && EntryEnd < End)
 137       EntryEnd++;
 138
 139    Name.append(Start, EntryEnd-Start);
 140    Start = EntryEnd; //prepare for the next round
 141    return true;
 142 }
 143
 144 indexRecords::indexRecords()
 145 {
 146 }
 147
 148 indexRecords::indexRecords(const string ExpectedDist) :
 149    ExpectedDist(ExpectedDist)
 150 {
 151 }