| 1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ |
| 3 | // $Id: versionmatch.cc,v 1.9 2003/05/19 17:58:26 doogie Exp $ |
| 4 | /* ###################################################################### |
| 5 | |
| 6 | Version Matching |
| 7 | |
| 8 | This module takes a matching string and a type and locates the version |
| 9 | record that satisfies the constraint described by the matching string. |
| 10 | |
| 11 | ##################################################################### */ |
| 12 | /*}}}*/ |
| 13 | // Include Files /*{{{*/ |
| 14 | #include <apt-pkg/versionmatch.h> |
| 15 | |
| 16 | #include <apt-pkg/strutl.h> |
| 17 | #include <apt-pkg/error.h> |
| 18 | |
| 19 | #include <stdio.h> |
| 20 | #include <ctype.h> |
| 21 | /*}}}*/ |
| 22 | |
| 23 | // VersionMatch::pkgVersionMatch - Constructor /*{{{*/ |
| 24 | // --------------------------------------------------------------------- |
| 25 | /* Break up the data string according to the selected type */ |
| 26 | pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type) |
| 27 | { |
| 28 | MatchAll = false; |
| 29 | VerPrefixMatch = false; |
| 30 | RelVerPrefixMatch = false; |
| 31 | |
| 32 | if (Type == None || Data.length() < 1) |
| 33 | return; |
| 34 | |
| 35 | // Cut up the version representation |
| 36 | if (Type == Version) |
| 37 | { |
| 38 | if (Data.end()[-1] == '*') |
| 39 | { |
| 40 | VerPrefixMatch = true; |
| 41 | VerStr = string(Data,0,Data.length()-1); |
| 42 | } |
| 43 | else |
| 44 | VerStr = Data; |
| 45 | return; |
| 46 | } |
| 47 | |
| 48 | if (Type == Release) |
| 49 | { |
| 50 | // All empty = match all |
| 51 | if (Data == "*") |
| 52 | { |
| 53 | MatchAll = true; |
| 54 | return; |
| 55 | } |
| 56 | |
| 57 | // Are we a simple specification? |
| 58 | string::const_iterator I = Data.begin(); |
| 59 | for (; I != Data.end() && *I != '='; I++); |
| 60 | if (I == Data.end()) |
| 61 | { |
| 62 | // Temporary |
| 63 | if (isdigit(Data[0])) |
| 64 | RelVerStr = Data; |
| 65 | else |
| 66 | RelArchive = Data; |
| 67 | |
| 68 | if (RelVerStr.length() > 0 && RelVerStr.end()[-1] == '*') |
| 69 | { |
| 70 | RelVerPrefixMatch = true; |
| 71 | RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1); |
| 72 | } |
| 73 | return; |
| 74 | } |
| 75 | |
| 76 | char Spec[300]; |
| 77 | char *Fragments[20]; |
| 78 | snprintf(Spec,sizeof(Spec),"%s",Data.c_str()); |
| 79 | if (TokSplitString(',',Spec,Fragments, |
| 80 | sizeof(Fragments)/sizeof(Fragments[0])) == false) |
| 81 | { |
| 82 | Type = None; |
| 83 | return; |
| 84 | } |
| 85 | |
| 86 | for (unsigned J = 0; Fragments[J] != 0; J++) |
| 87 | { |
| 88 | if (strlen(Fragments[J]) < 3) |
| 89 | continue; |
| 90 | |
| 91 | if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0) |
| 92 | RelVerStr = Fragments[J]+2; |
| 93 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0) |
| 94 | RelOrigin = Fragments[J]+2; |
| 95 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0) |
| 96 | RelArchive = Fragments[J]+2; |
| 97 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0) |
| 98 | RelLabel = Fragments[J]+2; |
| 99 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0) |
| 100 | RelComponent = Fragments[J]+2; |
| 101 | } |
| 102 | |
| 103 | if (RelVerStr.end()[-1] == '*') |
| 104 | { |
| 105 | RelVerPrefixMatch = true; |
| 106 | RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1); |
| 107 | } |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | if (Type == Origin) |
| 112 | { |
| 113 | OrSite = Data; |
| 114 | return; |
| 115 | } |
| 116 | } |
| 117 | /*}}}*/ |
| 118 | // VersionMatch::MatchVer - Match a version string with prefixing /*{{{*/ |
| 119 | // --------------------------------------------------------------------- |
| 120 | /* */ |
| 121 | bool pkgVersionMatch::MatchVer(const char *A,string B,bool Prefix) |
| 122 | { |
| 123 | const char *Ab = A; |
| 124 | const char *Ae = Ab + strlen(A); |
| 125 | |
| 126 | // Strings are not a compatible size. |
| 127 | if ((unsigned)(Ae - Ab) != B.length() && Prefix == false || |
| 128 | (unsigned)(Ae - Ab) < B.length()) |
| 129 | return false; |
| 130 | |
| 131 | // Match (leading?) |
| 132 | if (stringcasecmp(B,Ab,Ab + B.length()) == 0) |
| 133 | return true; |
| 134 | |
| 135 | return false; |
| 136 | } |
| 137 | /*}}}*/ |
| 138 | // VersionMatch::Find - Locate the best match for the select type /*{{{*/ |
| 139 | // --------------------------------------------------------------------- |
| 140 | /* */ |
| 141 | pkgCache::VerIterator pkgVersionMatch::Find(pkgCache::PkgIterator Pkg) |
| 142 | { |
| 143 | pkgCache::VerIterator Ver = Pkg.VersionList(); |
| 144 | for (; Ver.end() == false; Ver++) |
| 145 | { |
| 146 | if (Type == Version) |
| 147 | { |
| 148 | if (MatchVer(Ver.VerStr(),VerStr,VerPrefixMatch) == true) |
| 149 | return Ver; |
| 150 | continue; |
| 151 | } |
| 152 | |
| 153 | for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; VF++) |
| 154 | if (FileMatch(VF.File()) == true) |
| 155 | return Ver; |
| 156 | } |
| 157 | |
| 158 | // This will be Ended by now. |
| 159 | return Ver; |
| 160 | } |
| 161 | /*}}}*/ |
| 162 | // VersionMatch::FileMatch - Match against an index file /*{{{*/ |
| 163 | // --------------------------------------------------------------------- |
| 164 | /* This matcher checks against the release file and the origin location |
| 165 | to see if the constraints are met. */ |
| 166 | bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File) |
| 167 | { |
| 168 | if (Type == Release) |
| 169 | { |
| 170 | if (MatchAll == true) |
| 171 | return true; |
| 172 | |
| 173 | /* cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl; |
| 174 | cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl;*/ |
| 175 | |
| 176 | if (RelVerStr.empty() == true && RelOrigin.empty() == true && |
| 177 | RelArchive.empty() == true && RelLabel.empty() == true && |
| 178 | RelComponent.empty() == true) |
| 179 | return false; |
| 180 | |
| 181 | if (RelVerStr.empty() == false) |
| 182 | if (File->Version == 0 || |
| 183 | MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false) |
| 184 | return false; |
| 185 | if (RelOrigin.empty() == false) |
| 186 | if (File->Origin == 0 || |
| 187 | stringcasecmp(RelOrigin,File.Origin()) != 0) |
| 188 | return false; |
| 189 | if (RelArchive.empty() == false) |
| 190 | { |
| 191 | if (File->Archive == 0 || |
| 192 | stringcasecmp(RelArchive,File.Archive()) != 0) |
| 193 | return false; |
| 194 | } |
| 195 | if (RelLabel.empty() == false) |
| 196 | if (File->Label == 0 || |
| 197 | stringcasecmp(RelLabel,File.Label()) != 0) |
| 198 | return false; |
| 199 | if (RelComponent.empty() == false) |
| 200 | if (File->Component == 0 || |
| 201 | stringcasecmp(RelComponent,File.Component()) != 0) |
| 202 | return false; |
| 203 | return true; |
| 204 | } |
| 205 | |
| 206 | if (Type == Origin) |
| 207 | { |
| 208 | if (OrSite.empty() == false) { |
| 209 | if (File->Site == 0 || OrSite != File.Site()) |
| 210 | return false; |
| 211 | } else // so we are talking about file:// or status file |
| 212 | if (strcmp(File.Site(),"") == 0 && File->Archive != 0) // skip the status file |
| 213 | return false; |
| 214 | return (OrSite == File.Site()); /* both strings match */ |
| 215 | } |
| 216 | |
| 217 | return false; |
| 218 | } |
| 219 | /*}}}*/ |