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 #include <apt-pkg/indexrecords.h>
   7 #include <apt-pkg/tagfile.h>
   8 #include <apt-pkg/error.h>
   9 #include <apt-pkg/strutl.h>
  10 #include <apti18n.h>
  11 #include <sys/stat.h>
  12
  13 string indexRecords::GetDist() const
  14 {
  15    return this->Dist;
  16 }
  17
  18 bool indexRecords::CheckDist(const string MaybeDist) const
  19 {
  20    return (this->Dist == MaybeDist
  21            || this->Suite == MaybeDist);
  22 }
  23
  24 string indexRecords::GetExpectedDist() const
  25 {
  26    return this->ExpectedDist;
  27 }
  28
  29 const indexRecords::checkSum *indexRecords::Lookup(const string MetaKey)
  30 {
  31    return Entries[MetaKey];
  32 }
  33
  34 bool indexRecords::Load(const string Filename)
  35 {
  36    FileFd Fd(Filename, FileFd::ReadOnly);
  37    pkgTagFile TagFile(&Fd, Fd.Size() + 256); // XXX
  38    if (_error->PendingError() == true)
  39    {
  40       ErrorText = _(("Unable to parse Release file " + Filename).c_str());
  41       return false;
  42    }
  43
  44    pkgTagSection Section;
  45    if (TagFile.Step(Section) == false)
  46    {
  47       ErrorText = _(("No sections in Release file " + Filename).c_str());
  48       return false;
  49    }
  50
  51    const char *Start, *End;
  52    Section.Get (Start, End, 0);
  53
  54    Suite = Section.FindS("Suite");
  55    Dist = Section.FindS("Codename");
  56
  57    int i;
  58    for (i=0;HashString::SupportedHashes()[i] != NULL; i++)
  59    {
  60       if (!Section.Find(HashString::SupportedHashes()[i], Start, End))
  61          continue;
  62
  63       string Name;
  64       string Hash;
  65       size_t Size;
  66       while (Start < End)
  67       {
  68          if (!parseSumData(Start, End, Name, Hash, Size))
  69             return false;
  70          indexRecords::checkSum *Sum = new indexRecords::checkSum;
  71          Sum->MetaKeyFilename = Name;
  72          Sum->Hash = HashString(HashString::SupportedHashes()[i],Hash);
  73          Sum->Size = Size;
  74          Entries[Name] = Sum;
  75       }
  76       break;
  77    }
  78
  79    if(HashString::SupportedHashes()[i] == NULL)
  80    {
  81       ErrorText = _(("No Hash entry in Release file " + Filename).c_str());
  82       return false;
  83    }
  84
  85    string Strdate = Section.FindS("Date"); // FIXME: verify this somehow?
  86    return true;
  87 }
  88
  89 vector<string> indexRecords::MetaKeys()
  90 {
  91    std::vector<std::string> keys;
  92    std::map<string,checkSum *>::iterator I = Entries.begin();
  93    while(I != Entries.end()) {
  94       keys.push_back((*I).first);
  95       ++I;
  96    }
  97    return keys;
  98 }
  99
 100 bool indexRecords::parseSumData(const char *&Start, const char *End,
 101                                    string &Name, string &Hash, size_t &Size)
 102 {
 103    Name = "";
 104    Hash = "";
 105    Size = 0;
 106    /* Skip over the first blank */
 107    while ((*Start == '\t' || *Start == ' ' || *Start == '\n')
 108           && Start < End)
 109       Start++;
 110    if (Start >= End)
 111       return false;
 112
 113    /* Move EntryEnd to the end of the first entry (the hash) */
 114    const char *EntryEnd = Start;
 115    while ((*EntryEnd != '\t' && *EntryEnd != ' ')
 116           && EntryEnd < End)
 117       EntryEnd++;
 118    if (EntryEnd == End)
 119       return false;
 120
 121    Hash.append(Start, EntryEnd-Start);
 122
 123    /* Skip over intermediate blanks */
 124    Start = EntryEnd;
 125    while (*Start == '\t' || *Start == ' ')
 126       Start++;
 127    if (Start >= End)
 128       return false;
 129
 130    EntryEnd = Start;
 131    /* Find the end of the second entry (the size) */
 132    while ((*EntryEnd != '\t' && *EntryEnd != ' ' )
 133           && EntryEnd < End)
 134       EntryEnd++;
 135    if (EntryEnd == End)
 136       return false;
 137
 138    Size = strtol (Start, NULL, 10);
 139
 140    /* Skip over intermediate blanks */
 141    Start = EntryEnd;
 142    while (*Start == '\t' || *Start == ' ')
 143       Start++;
 144    if (Start >= End)
 145       return false;
 146
 147    EntryEnd = Start;
 148    /* Find the end of the third entry (the filename) */
 149    while ((*EntryEnd != '\t' && *EntryEnd != ' ' && *EntryEnd != '\n')
 150           && EntryEnd < End)
 151       EntryEnd++;
 152
 153    Name.append(Start, EntryEnd-Start);
 154    Start = EntryEnd; //prepare for the next round
 155    return true;
 156 }
 157
 158 indexRecords::indexRecords()
 159 {
 160 }
 161
 162 indexRecords::indexRecords(const string ExpectedDist) :
 163    ExpectedDist(ExpectedDist)
 164 {
 165 }