Join with aliencode

Author: jgg
Date: 2001-02-20 07:03:16 GMT
Join with aliencode

1 files changed, 210 insertions, 0 deletions

diff --git a/apt-pkg/versionmatch.cc b/apt-pkg/versionmatch.cc
new file mode 100644
index 000000000..45cdb117e
--- /dev/null
+++ b/apt-pkg/versionmatch.cc
@@ -0,0 +1,210 @@
+// -*- 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;
+}
+									/*}}}*/