apt-pkg/deb/deblistparser.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: deblistparser.cc,v 1.29.2.5 2004/01/06 01:43:44 mdz Exp $
   4 /* ######################################################################
   5
   6    Package Cache Generator - Generator for the cache structure.
   7
   8    This builds the cache structure from the abstract package list parser.
   9
  10    ##################################################################### */
  11                                                                         /*}}}*/
  12 // Include Files                                                        /*{{{*/
  13 #include <apt-pkg/deblistparser.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16 #include <apt-pkg/aptconfiguration.h>
  17 #include <apt-pkg/strutl.h>
  18 #include <apt-pkg/crc-16.h>
  19 #include <apt-pkg/md5.h>
  20
  21 #include <ctype.h>
  22
  23 #include <system.h>
  24                                                                         /*}}}*/
  25
  26 static debListParser::WordList PrioList[] = {{"important",pkgCache::State::Important},
  27                        {"required",pkgCache::State::Required},
  28                        {"standard",pkgCache::State::Standard},
  29                        {"optional",pkgCache::State::Optional},
  30                        {"extra",pkgCache::State::Extra},
  31                        {}};
  32
  33 // ListParser::debListParser - Constructor                              /*{{{*/
  34 // ---------------------------------------------------------------------
  35 /* Provide an architecture and only this one and "all" will be accepted
  36    in Step(), if no Architecture is given we will accept every arch
  37    we would accept in general with checkArchitecture() */
  38 debListParser::debListParser(FileFd *File, string const &Arch) : Tags(File),
  39                                 Arch(Arch) {
  40         if (Arch == "native")
  41                 this->Arch = _config->Find("APT::Architecture");
  42 }
  43                                                                         /*}}}*/
  44 // ListParser::UniqFindTagWrite - Find the tag and write a unq string   /*{{{*/
  45 // ---------------------------------------------------------------------
  46 /* */
  47 unsigned long debListParser::UniqFindTagWrite(const char *Tag)
  48 {
  49    const char *Start;
  50    const char *Stop;
  51    if (Section.Find(Tag,Start,Stop) == false)
  52       return 0;
  53    return WriteUniqString(Start,Stop - Start);
  54 }
  55                                                                         /*}}}*/
  56 // ListParser::Package - Return the package name                        /*{{{*/
  57 // ---------------------------------------------------------------------
  58 /* This is to return the name of the package this section describes */
  59 string debListParser::Package() {
  60         string const Result = Section.FindS("Package");
  61         if(unlikely(Result.empty() == true))
  62                 _error->Error("Encountered a section with no Package: header");
  63         return Result;
  64 }
  65                                                                         /*}}}*/
  66 // ListParser::Architecture - Return the package arch                   /*{{{*/
  67 // ---------------------------------------------------------------------
  68 /* This will return the Architecture of the package this section describes
  69    Note that architecture "all" packages will get the architecture of the
  70    Packages file parsed here. */
  71 string debListParser::Architecture() {
  72         string const Result = Section.FindS("Architecture");
  73         if (Result.empty() == true || Result == "all") {
  74                 if (Arch.empty() == true)
  75                         /* FIXME: this is a problem for installed arch all
  76                            packages as we don't know from which arch this
  77                            package was installed - and therefore which
  78                            dependency this package resolves. */
  79                         return _config->Find("APT::Architecture");
  80                 else
  81                         return Arch;
  82         }
  83         return Result;
  84 }
  85                                                                         /*}}}*/
  86 // ListParser::ArchitectureAll                                          /*{{{*/
  87 // ---------------------------------------------------------------------
  88 /* */
  89 bool debListParser::ArchitectureAll() {
  90         return Section.FindS("Architecture") == "all";
  91 }
  92                                                                         /*}}}*/
  93 // ListParser::Version - Return the version string                      /*{{{*/
  94 // ---------------------------------------------------------------------
  95 /* This is to return the string describing the version in debian form,
  96    epoch:upstream-release. If this returns the blank string then the
  97    entry is assumed to only describe package properties */
  98 string debListParser::Version()
  99 {
 100    return Section.FindS("Version");
 101 }
 102                                                                         /*}}}*/
 103 // ListParser::NewVersion - Fill in the version structure               /*{{{*/
 104 // ---------------------------------------------------------------------
 105 /* */
 106 bool debListParser::NewVersion(pkgCache::VerIterator Ver)
 107 {
 108    // Parse the section
 109    Ver->Section = UniqFindTagWrite("Section");
 110
 111    // Parse multi-arch
 112    if (Section.FindS("Architecture") == "all")
 113       /* Arch all packages can't have a Multi-Arch field,
 114          but we need a special treatment for them nonetheless */
 115       Ver->MultiArch = pkgCache::Version::All;
 116    else
 117    {
 118       string const MultiArch = Section.FindS("Multi-Arch");
 119       if (MultiArch.empty() == true)
 120          Ver->MultiArch = pkgCache::Version::None;
 121       else if (MultiArch == "same")
 122          Ver->MultiArch = pkgCache::Version::Same;
 123       else if (MultiArch == "foreign")
 124          Ver->MultiArch = pkgCache::Version::Foreign;
 125       else if (MultiArch == "allowed")
 126          Ver->MultiArch = pkgCache::Version::Allowed;
 127       else
 128       {
 129          _error->Warning("Unknown Multi-Arch type »%s« for package »%s«",
 130                         MultiArch.c_str(), Section.FindS("Package").c_str());
 131          Ver->MultiArch = pkgCache::Version::None;
 132       }
 133    }
 134
 135    // Archive Size
 136    Ver->Size = (unsigned)Section.FindI("Size");
 137
 138    // Unpacked Size (in K)
 139    Ver->InstalledSize = (unsigned)Section.FindI("Installed-Size");
 140    Ver->InstalledSize *= 1024;
 141
 142    // Priority
 143    const char *Start;
 144    const char *Stop;
 145    if (Section.Find("Priority",Start,Stop) == true)
 146    {
 147       if (GrabWord(string(Start,Stop-Start),PrioList,Ver->Priority) == false)
 148          Ver->Priority = pkgCache::State::Extra;
 149    }
 150
 151    if (ParseDepends(Ver,"Depends",pkgCache::Dep::Depends) == false)
 152       return false;
 153    if (ParseDepends(Ver,"Pre-Depends",pkgCache::Dep::PreDepends) == false)
 154       return false;
 155    if (ParseDepends(Ver,"Suggests",pkgCache::Dep::Suggests) == false)
 156       return false;
 157    if (ParseDepends(Ver,"Recommends",pkgCache::Dep::Recommends) == false)
 158       return false;
 159    if (ParseDepends(Ver,"Conflicts",pkgCache::Dep::Conflicts) == false)
 160       return false;
 161    if (ParseDepends(Ver,"Breaks",pkgCache::Dep::DpkgBreaks) == false)
 162       return false;
 163    if (ParseDepends(Ver,"Replaces",pkgCache::Dep::Replaces) == false)
 164       return false;
 165    if (ParseDepends(Ver,"Enhances",pkgCache::Dep::Enhances) == false)
 166       return false;
 167
 168    // Obsolete.
 169    if (ParseDepends(Ver,"Optional",pkgCache::Dep::Suggests) == false)
 170       return false;
 171
 172    if (ParseProvides(Ver) == false)
 173       return false;
 174
 175    return true;
 176 }
 177                                                                         /*}}}*/
 178 // ListParser::Description - Return the description string              /*{{{*/
 179 // ---------------------------------------------------------------------
 180 /* This is to return the string describing the package in debian
 181    form. If this returns the blank string then the entry is assumed to
 182    only describe package properties */
 183 string debListParser::Description()
 184 {
 185    string const lang = DescriptionLanguage();
 186    if (lang.empty())
 187       return Section.FindS("Description");
 188    else
 189       return Section.FindS(string("Description-").append(lang).c_str());
 190 }
 191                                                                         /*}}}*/
 192 // ListParser::DescriptionLanguage - Return the description lang string /*{{{*/
 193 // ---------------------------------------------------------------------
 194 /* This is to return the string describing the language of
 195    description. If this returns the blank string then the entry is
 196    assumed to describe original description. */
 197 string debListParser::DescriptionLanguage()
 198 {
 199    if (Section.FindS("Description").empty() == false)
 200       return "";
 201
 202    std::vector<string> const lang = APT::Configuration::getLanguages();
 203    for (std::vector<string>::const_iterator l = lang.begin();
 204         l != lang.end(); l++)
 205       if (Section.FindS(string("Description-").append(*l).c_str()).empty() == false)
 206          return *l;
 207
 208    return "";
 209 }
 210                                                                         /*}}}*/
 211 // ListParser::Description - Return the description_md5 MD5SumValue     /*{{{*/
 212 // ---------------------------------------------------------------------
 213 /* This is to return the md5 string to allow the check if it is the right
 214    description. If no Description-md5 is found in the section it will be
 215    calculated.
 216  */
 217 MD5SumValue debListParser::Description_md5()
 218 {
 219    string value = Section.FindS("Description-md5");
 220
 221    if (value.empty())
 222    {
 223       MD5Summation md5;
 224       md5.Add((Description() + "\n").c_str());
 225       return md5.Result();
 226    } else
 227       return MD5SumValue(value);
 228 }
 229                                                                         /*}}}*/
 230 // ListParser::UsePackage - Update a package structure                  /*{{{*/
 231 // ---------------------------------------------------------------------
 232 /* This is called to update the package with any new information
 233    that might be found in the section */
 234 bool debListParser::UsePackage(pkgCache::PkgIterator Pkg,
 235                                pkgCache::VerIterator Ver)
 236 {
 237    if (Pkg->Section == 0)
 238       Pkg->Section = UniqFindTagWrite("Section");
 239
 240    // Packages which are not from "our" arch doesn't get the essential flag
 241    string const static myArch = _config->Find("APT::Architecture");
 242    if (Pkg->Arch != 0 && myArch == Pkg.Arch())
 243       if (Section.FindFlag("Essential",Pkg->Flags,pkgCache::Flag::Essential) == false)
 244          return false;
 245    if (Section.FindFlag("Important",Pkg->Flags,pkgCache::Flag::Important) == false)
 246       return false;
 247
 248    if (strcmp(Pkg.Name(),"apt") == 0)
 249       Pkg->Flags |= pkgCache::Flag::Important;
 250
 251    if (ParseStatus(Pkg,Ver) == false)
 252       return false;
 253    return true;
 254 }
 255                                                                         /*}}}*/
 256 // ListParser::VersionHash - Compute a unique hash for this version     /*{{{*/
 257 // ---------------------------------------------------------------------
 258 /* */
 259 unsigned short debListParser::VersionHash()
 260 {
 261    const char *Sections[] ={"Installed-Size",
 262                             "Depends",
 263                             "Pre-Depends",
 264 //                            "Suggests",
 265 //                            "Recommends",
 266                             "Conflicts",
 267                             "Breaks",
 268                             "Replaces",0};
 269    unsigned long Result = INIT_FCS;
 270    char S[1024];
 271    for (const char **I = Sections; *I != 0; I++)
 272    {
 273       const char *Start;
 274       const char *End;
 275       if (Section.Find(*I,Start,End) == false || End - Start >= (signed)sizeof(S))
 276          continue;
 277
 278       /* Strip out any spaces from the text, this undoes dpkgs reformatting
 279          of certain fields. dpkg also has the rather interesting notion of
 280          reformatting depends operators < -> <= */
 281       char *I = S;
 282       for (; Start != End; Start++)
 283       {
 284          if (isspace(*Start) == 0)
 285             *I++ = tolower_ascii(*Start);
 286          if (*Start == '<' && Start[1] != '<' && Start[1] != '=')
 287             *I++ = '=';
 288          if (*Start == '>' && Start[1] != '>' && Start[1] != '=')
 289             *I++ = '=';
 290       }
 291
 292       Result = AddCRC16(Result,S,I - S);
 293    }
 294
 295    return Result;
 296 }
 297                                                                         /*}}}*/
 298 // ListParser::ParseStatus - Parse the status field                     /*{{{*/
 299 // ---------------------------------------------------------------------
 300 /* Status lines are of the form,
 301      Status: want flag status
 302    want = unknown, install, hold, deinstall, purge
 303    flag = ok, reinstreq, hold, hold-reinstreq
 304    status = not-installed, unpacked, half-configured,
 305             half-installed, config-files, post-inst-failed,
 306             removal-failed, installed
 307
 308    Some of the above are obsolete (I think?) flag = hold-* and
 309    status = post-inst-failed, removal-failed at least.
 310  */
 311 bool debListParser::ParseStatus(pkgCache::PkgIterator Pkg,
 312                                 pkgCache::VerIterator Ver)
 313 {
 314    const char *Start;
 315    const char *Stop;
 316    if (Section.Find("Status",Start,Stop) == false)
 317       return true;
 318
 319    // Isolate the first word
 320    const char *I = Start;
 321    for(; I < Stop && *I != ' '; I++);
 322    if (I >= Stop || *I != ' ')
 323       return _error->Error("Malformed Status line");
 324
 325    // Process the want field
 326    WordList WantList[] = {{"unknown",pkgCache::State::Unknown},
 327                           {"install",pkgCache::State::Install},
 328                           {"hold",pkgCache::State::Hold},
 329                           {"deinstall",pkgCache::State::DeInstall},
 330                           {"purge",pkgCache::State::Purge},
 331                           {}};
 332    if (GrabWord(string(Start,I-Start),WantList,Pkg->SelectedState) == false)
 333       return _error->Error("Malformed 1st word in the Status line");
 334
 335    // Isloate the next word
 336    I++;
 337    Start = I;
 338    for(; I < Stop && *I != ' '; I++);
 339    if (I >= Stop || *I != ' ')
 340       return _error->Error("Malformed status line, no 2nd word");
 341
 342    // Process the flag field
 343    WordList FlagList[] = {{"ok",pkgCache::State::Ok},
 344                           {"reinstreq",pkgCache::State::ReInstReq},
 345                           {"hold",pkgCache::State::HoldInst},
 346                           {"hold-reinstreq",pkgCache::State::HoldReInstReq},
 347                           {}};
 348    if (GrabWord(string(Start,I-Start),FlagList,Pkg->InstState) == false)
 349       return _error->Error("Malformed 2nd word in the Status line");
 350
 351    // Isloate the last word
 352    I++;
 353    Start = I;
 354    for(; I < Stop && *I != ' '; I++);
 355    if (I != Stop)
 356       return _error->Error("Malformed Status line, no 3rd word");
 357
 358    // Process the flag field
 359    WordList StatusList[] = {{"not-installed",pkgCache::State::NotInstalled},
 360                             {"unpacked",pkgCache::State::UnPacked},
 361                             {"half-configured",pkgCache::State::HalfConfigured},
 362                             {"installed",pkgCache::State::Installed},
 363                             {"half-installed",pkgCache::State::HalfInstalled},
 364                             {"config-files",pkgCache::State::ConfigFiles},
 365                             {"triggers-awaited",pkgCache::State::TriggersAwaited},
 366                             {"triggers-pending",pkgCache::State::TriggersPending},
 367                             {"post-inst-failed",pkgCache::State::HalfConfigured},
 368                             {"removal-failed",pkgCache::State::HalfInstalled},
 369                             {}};
 370    if (GrabWord(string(Start,I-Start),StatusList,Pkg->CurrentState) == false)
 371       return _error->Error("Malformed 3rd word in the Status line");
 372
 373    /* A Status line marks the package as indicating the current
 374       version as well. Only if it is actually installed.. Otherwise
 375       the interesting dpkg handling of the status file creates bogus
 376       entries. */
 377    if (!(Pkg->CurrentState == pkgCache::State::NotInstalled ||
 378          Pkg->CurrentState == pkgCache::State::ConfigFiles))
 379    {
 380       if (Ver.end() == true)
 381          _error->Warning("Encountered status field in a non-version description");
 382       else
 383          Pkg->CurrentVer = Ver.Index();
 384    }
 385
 386    return true;
 387 }
 388
 389 const char *debListParser::ConvertRelation(const char *I,unsigned int &Op)
 390 {
 391    // Determine the operator
 392    switch (*I)
 393    {
 394       case '<':
 395       I++;
 396       if (*I == '=')
 397       {
 398          I++;
 399          Op = pkgCache::Dep::LessEq;
 400          break;
 401       }
 402
 403       if (*I == '<')
 404       {
 405          I++;
 406          Op = pkgCache::Dep::Less;
 407          break;
 408       }
 409
 410       // < is the same as <= and << is really Cs < for some reason
 411       Op = pkgCache::Dep::LessEq;
 412       break;
 413
 414       case '>':
 415       I++;
 416       if (*I == '=')
 417       {
 418          I++;
 419          Op = pkgCache::Dep::GreaterEq;
 420          break;
 421       }
 422
 423       if (*I == '>')
 424       {
 425          I++;
 426          Op = pkgCache::Dep::Greater;
 427          break;
 428       }
 429
 430       // > is the same as >= and >> is really Cs > for some reason
 431       Op = pkgCache::Dep::GreaterEq;
 432       break;
 433
 434       case '=':
 435       Op = pkgCache::Dep::Equals;
 436       I++;
 437       break;
 438
 439       // HACK around bad package definitions
 440       default:
 441       Op = pkgCache::Dep::Equals;
 442       break;
 443    }
 444    return I;
 445 }
 446
 447                                                                         /*}}}*/
 448 // ListParser::ParseDepends - Parse a dependency element                /*{{{*/
 449 // ---------------------------------------------------------------------
 450 /* This parses the dependency elements out of a standard string in place,
 451    bit by bit. */
 452 const char *debListParser::ParseDepends(const char *Start,const char *Stop,
 453                                         string &Package,string &Ver,
 454                                         unsigned int &Op, bool const &ParseArchFlags,
 455                                         bool const &StripMultiArch)
 456 {
 457    // Strip off leading space
 458    for (;Start != Stop && isspace(*Start) != 0; Start++);
 459
 460    // Parse off the package name
 461    const char *I = Start;
 462    for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
 463         *I != ',' && *I != '|'; I++);
 464
 465    // Malformed, no '('
 466    if (I != Stop && *I == ')')
 467       return 0;
 468
 469    if (I == Start)
 470       return 0;
 471
 472    // Stash the package name
 473    Package.assign(Start,I - Start);
 474
 475    // We don't want to confuse library users which can't handle MultiArch
 476    if (StripMultiArch == true) {
 477       size_t const found = Package.rfind(':');
 478       if (found != string::npos)
 479          Package = Package.substr(0,found);
 480    }
 481
 482    // Skip white space to the '('
 483    for (;I != Stop && isspace(*I) != 0 ; I++);
 484
 485    // Parse a version
 486    if (I != Stop && *I == '(')
 487    {
 488       // Skip the '('
 489       for (I++; I != Stop && isspace(*I) != 0 ; I++);
 490       if (I + 3 >= Stop)
 491          return 0;
 492       I = ConvertRelation(I,Op);
 493
 494       // Skip whitespace
 495       for (;I != Stop && isspace(*I) != 0; I++);
 496       Start = I;
 497       for (;I != Stop && *I != ')'; I++);
 498       if (I == Stop || Start == I)
 499          return 0;
 500
 501       // Skip trailing whitespace
 502       const char *End = I;
 503       for (; End > Start && isspace(End[-1]); End--);
 504
 505       Ver.assign(Start,End-Start);
 506       I++;
 507    }
 508    else
 509    {
 510       Ver.clear();
 511       Op = pkgCache::Dep::NoOp;
 512    }
 513
 514    // Skip whitespace
 515    for (;I != Stop && isspace(*I) != 0; I++);
 516
 517    if (ParseArchFlags == true)
 518    {
 519       string arch = _config->Find("APT::Architecture");
 520
 521       // Parse an architecture
 522       if (I != Stop && *I == '[')
 523       {
 524          // malformed
 525          I++;
 526          if (I == Stop)
 527             return 0;
 528
 529          const char *End = I;
 530          bool Found = false;
 531          bool NegArch = false;
 532          while (I != Stop)
 533          {
 534             // look for whitespace or ending ']'
 535             while (End != Stop && !isspace(*End) && *End != ']')
 536                End++;
 537
 538             if (End == Stop)
 539                return 0;
 540
 541             if (*I == '!')
 542             {
 543                NegArch = true;
 544                I++;
 545             }
 546
 547             if (stringcmp(arch,I,End) == 0)
 548                Found = true;
 549
 550             if (*End++ == ']') {
 551                I = End;
 552                break;
 553             }
 554
 555             I = End;
 556             for (;I != Stop && isspace(*I) != 0; I++);
 557          }
 558
 559          if (NegArch)
 560             Found = !Found;
 561
 562          if (Found == false)
 563             Package = ""; /* not for this arch */
 564       }
 565
 566       // Skip whitespace
 567       for (;I != Stop && isspace(*I) != 0; I++);
 568    }
 569
 570    if (I != Stop && *I == '|')
 571       Op |= pkgCache::Dep::Or;
 572
 573    if (I == Stop || *I == ',' || *I == '|')
 574    {
 575       if (I != Stop)
 576          for (I++; I != Stop && isspace(*I) != 0; I++);
 577       return I;
 578    }
 579
 580    return 0;
 581 }
 582                                                                         /*}}}*/
 583 // ListParser::ParseDepends - Parse a dependency list                   /*{{{*/
 584 // ---------------------------------------------------------------------
 585 /* This is the higher level depends parser. It takes a tag and generates
 586    a complete depends tree for the given version. */
 587 bool debListParser::ParseDepends(pkgCache::VerIterator Ver,
 588                                  const char *Tag,unsigned int Type)
 589 {
 590    const char *Start;
 591    const char *Stop;
 592    if (Section.Find(Tag,Start,Stop) == false)
 593       return true;
 594
 595    string Package;
 596    string const pkgArch = Ver.Arch();
 597    string Version;
 598    unsigned int Op;
 599
 600    while (1)
 601    {
 602       Start = ParseDepends(Start,Stop,Package,Version,Op);
 603       if (Start == 0)
 604          return _error->Error("Problem parsing dependency %s",Tag);
 605
 606       if (NewDepends(Ver,Package,pkgArch,Version,Op,Type) == false)
 607          return false;
 608       if (Start == Stop)
 609          break;
 610    }
 611    return true;
 612 }
 613                                                                         /*}}}*/
 614 // ListParser::ParseProvides - Parse the provides list                  /*{{{*/
 615 // ---------------------------------------------------------------------
 616 /* */
 617 bool debListParser::ParseProvides(pkgCache::VerIterator Ver)
 618 {
 619    const char *Start;
 620    const char *Stop;
 621    if (Section.Find("Provides",Start,Stop) == true)
 622    {
 623       string Package;
 624       string Version;
 625       string const Arch = Ver.Arch();
 626       unsigned int Op;
 627
 628       while (1)
 629       {
 630          Start = ParseDepends(Start,Stop,Package,Version,Op);
 631          if (Start == 0)
 632             return _error->Error("Problem parsing Provides line");
 633          if (Op != pkgCache::Dep::NoOp) {
 634             _error->Warning("Ignoring Provides line with DepCompareOp for package %s", Package.c_str());
 635          } else {
 636             if (NewProvides(Ver, Package, Arch, Version) == false)
 637                return false;
 638          }
 639
 640          if (Start == Stop)
 641             break;
 642       }
 643    }
 644
 645    if (Ver->MultiArch == pkgCache::Version::Allowed)
 646    {
 647       string const Package = string(Ver.ParentPkg().Name()).append(":").append("any");
 648       NewProvides(Ver, Package, "any", Ver.VerStr());
 649    }
 650
 651    if (Ver->MultiArch != pkgCache::Version::Foreign)
 652       return true;
 653
 654    std::vector<string> const archs = APT::Configuration::getArchitectures();
 655    if (archs.size() <= 1)
 656       return true;
 657
 658    string const Package = Ver.ParentPkg().Name();
 659    string const Version = Ver.VerStr();
 660    for (std::vector<string>::const_iterator a = archs.begin();
 661         a != archs.end(); ++a)
 662    {
 663       if (NewProvides(Ver, Package, *a, Version) == false)
 664          return false;
 665    }
 666
 667    return true;
 668 }
 669                                                                         /*}}}*/
 670 // ListParser::GrabWord - Matches a word and returns                    /*{{{*/
 671 // ---------------------------------------------------------------------
 672 /* Looks for a word in a list of words - for ParseStatus */
 673 bool debListParser::GrabWord(string Word,WordList *List,unsigned char &Out)
 674 {
 675    for (unsigned int C = 0; List[C].Str != 0; C++)
 676    {
 677       if (strcasecmp(Word.c_str(),List[C].Str) == 0)
 678       {
 679          Out = List[C].Val;
 680          return true;
 681       }
 682    }
 683    return false;
 684 }
 685                                                                         /*}}}*/
 686 // ListParser::Step - Move to the next section in the file              /*{{{*/
 687 // ---------------------------------------------------------------------
 688 /* This has to be carefull to only process the correct architecture */
 689 bool debListParser::Step()
 690 {
 691    iOffset = Tags.Offset();
 692    while (Tags.Step(Section) == true)
 693    {
 694       /* See if this is the correct Architecture, if it isn't then we
 695          drop the whole section. A missing arch tag only happens (in theory)
 696          inside the Status file, so that is a positive return */
 697       string const Architecture = Section.FindS("Architecture");
 698       if (Architecture.empty() == true)
 699          return true;
 700
 701       if (Arch.empty() == true)
 702       {
 703          if (APT::Configuration::checkArchitecture(Architecture) == true)
 704             return true;
 705       }
 706       else
 707       {
 708          if (Architecture == Arch)
 709             return true;
 710
 711          if (Architecture == "all")
 712             return true;
 713       }
 714
 715       iOffset = Tags.Offset();
 716    }
 717    return false;
 718 }
 719                                                                         /*}}}*/
 720 // ListParser::LoadReleaseInfo - Load the release information           /*{{{*/
 721 // ---------------------------------------------------------------------
 722 /* */
 723 bool debListParser::LoadReleaseInfo(pkgCache::PkgFileIterator FileI,
 724                                     FileFd &File, string component)
 725 {
 726    pkgTagFile Tags(&File, File.Size() + 256); // XXX
 727    pkgTagSection Section;
 728    if (Tags.Step(Section) == false)
 729       return false;
 730
 731    // FIXME: Do we need it now for multi-arch?
 732    // mvo: I don't think we need to fill that in (it's unused since apt-0.6)
 733 //    FileI->Architecture = WriteUniqString(Arch);
 734
 735    // apt-secure does no longer download individual (per-section) Release
 736    // file. to provide Component pinning we use the section name now
 737    FileI->Component = WriteUniqString(component);
 738
 739    const char *Start;
 740    const char *Stop;
 741    if (Section.Find("Suite",Start,Stop) == true)
 742       FileI->Archive = WriteUniqString(Start,Stop - Start);
 743    if (Section.Find("Component",Start,Stop) == true)
 744       FileI->Component = WriteUniqString(Start,Stop - Start);
 745    if (Section.Find("Version",Start,Stop) == true)
 746       FileI->Version = WriteUniqString(Start,Stop - Start);
 747    if (Section.Find("Origin",Start,Stop) == true)
 748       FileI->Origin = WriteUniqString(Start,Stop - Start);
 749    if (Section.Find("Codename",Start,Stop) == true)
 750       FileI->Codename = WriteUniqString(Start,Stop - Start);
 751    if (Section.Find("Label",Start,Stop) == true)
 752       FileI->Label = WriteUniqString(Start,Stop - Start);
 753    if (Section.Find("Architecture",Start,Stop) == true)
 754       FileI->Architecture = WriteUniqString(Start,Stop - Start);
 755
 756    if (Section.FindFlag("NotAutomatic",FileI->Flags,
 757                         pkgCache::Flag::NotAutomatic) == false)
 758       _error->Warning("Bad NotAutomatic flag");
 759
 760    return !_error->PendingError();
 761 }
 762                                                                         /*}}}*/
 763 // ListParser::GetPrio - Convert the priority from a string             /*{{{*/
 764 // ---------------------------------------------------------------------
 765 /* */
 766 unsigned char debListParser::GetPrio(string Str)
 767 {
 768    unsigned char Out;
 769    if (GrabWord(Str,PrioList,Out) == false)
 770       Out = pkgCache::State::Extra;
 771
 772    return Out;
 773 }
 774                                                                         /*}}}*/