// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: versionmatch.cc,v 1.2 2001/02/20 07:03:17 jgg Exp $ /* ###################################################################### Version Matching This module takes a matching string and a type and locates the version record that satisfies the constraint described by the matching string. ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ #ifdef __GNUG__ #pragma implementation "apt-pkg/versionmatch.h" #endif #include <apt-pkg/versionmatch.h> #include <apt-pkg/strutl.h> #include <apt-pkg/error.h> #include <stdio.h> /*}}}*/ // VersionMatch::pkgVersionMatch - Constructor /*{{{*/ // --------------------------------------------------------------------- /* Break up the data string according to the selected type */ pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type) { if (Type == None || Data.length() < 1) return; // Cut up the version representation if (Type == Version) { if (Data.end()[-1] == '*') { VerPrefixMatch = true; VerStr = string(Data.begin(),Data.end()-1); } else VerStr = Data; return; } if (Type == Release) { // All empty = match all if (Data == "*") return; // Are we a simple specification? const char *I = Data.begin(); for (; I < Data.end() && *I != '='; I++); if (I == Data.end()) { // Temporary if (isdigit(Data[0])) RelVerStr = Data; else RelArchive = Data; if (RelVerStr.end()[-1] == '*') { RelVerPrefixMatch = true; RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1); } return; } char Spec[300]; char *Fragments[20]; snprintf(Spec,sizeof(Spec),"%s",Data.c_str()); if (TokSplitString(',',Spec,Fragments, sizeof(Fragments)/sizeof(Fragments[0])) == false) { Type = None; return; } for (unsigned J = 0; Fragments[J] != 0; J++) { if (strlen(Fragments[J]) < 3) continue; if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0) RelVerStr = Fragments[J]+2; else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0) RelOrigin = Fragments[J]+2; else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0) RelArchive = Fragments[J]+2; else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0) RelLabel = Fragments[J]+2; else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0) RelComponent = Fragments[J]+2; } if (RelVerStr.end()[-1] == '*') { RelVerPrefixMatch = true; RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1); } return; } if (Type == Origin) { OrSite = Data; return; } } /*}}}*/ // VersionMatch::MatchVer - Match a version string with prefixing /*{{{*/ // --------------------------------------------------------------------- /* */ bool pkgVersionMatch::MatchVer(const char *A,string B,bool Prefix) { const char *Ab = A; const char *Ae = Ab + strlen(A); // Strings are not a compatible size. if ((unsigned)(Ae - Ab) != B.length() && Prefix == false || (unsigned)(Ae - Ab) < B.length()) return false; // Match (leading?) if (stringcasecmp(B.begin(),B.end(), Ab,Ab + B.length()) == 0) return true; return false; } /*}}}*/ // VersionMatch::Find - Locate the best match for the select type /*{{{*/ // --------------------------------------------------------------------- /* */ pkgCache::VerIterator pkgVersionMatch::Find(pkgCache::PkgIterator Pkg) { pkgCache::VerIterator Ver = Pkg.VersionList(); for (; Ver.end() == false; Ver++) { if (Type == Version) { if (MatchVer(Ver.VerStr(),VerStr,VerPrefixMatch) == true) return Ver; continue; } for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; VF++) if (FileMatch(VF.File()) == true) return Ver; } // This will be Ended by now. return Ver; } /*}}}*/ // VersionMatch::FileMatch - Match against an index file /*{{{*/ // --------------------------------------------------------------------- /* This matcher checks against the release file and the origin location to see if the constraints are met. */ bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File) { if (Type == Release) { /* cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl; cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl; */ if (RelVerStr.empty() == true && RelOrigin.empty() == true && RelArchive.empty() == true && RelLabel.empty() == true && RelComponent.empty() == true) return false; if (RelVerStr.empty() == false) if (File->Version == 0 || MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false) return false; if (RelOrigin.empty() == false) if (File->Origin == 0 || stringcasecmp(RelOrigin,File.Origin()) != 0) return false; if (RelArchive.empty() == false) { if (File->Archive == 0 || stringcasecmp(RelArchive,File.Archive()) != 0) return false; } if (RelLabel.empty() == false) if (File->Label == 0 || stringcasecmp(RelLabel,File.Label()) != 0) return false; if (RelComponent.empty() == false) if (File->Component == 0 || stringcasecmp(RelLabel,File.Component()) != 0) return false; return true; } if (Type == Origin) { if (OrSite.empty() == false) if (File->Site == 0 || OrSite != File.Site()) return false; return true; } return false; } /*}}}*/