From 8ba17539a3ec33abc283ca382cca6e59876a0f07 Mon Sep 17 00:00:00 2001
From: David Kalnischkies <kalnischkies@gmail.com>
Date: Sat, 25 May 2013 19:57:48 +0200
Subject: fix support for multiple patterns in apt-cache search

Patterns can appear in the name as well as in the description,
they don't have to match all in the name/description only.

Closes: 691453
---
 cmdline/apt-cache.cc | 79 +++++++++++++++++++++++++++++++++-------------------
 1 file changed, 51 insertions(+), 28 deletions(-)

(limited to 'cmdline')

diff --git a/cmdline/apt-cache.cc b/cmdline/apt-cache.cc
index de263a300..bda09a5a1 100644
--- a/cmdline/apt-cache.cc
+++ b/cmdline/apt-cache.cc
@@ -1203,7 +1203,7 @@ bool DisplayRecord(pkgCacheFile &CacheFile, pkgCache::VerIterator V)
 struct ExDescFile
 {
    pkgCache::DescFile *Df;
-   bool NameMatch;
+   map_ptrloc ID;
 };
 
 // Search - Perform a search						/*{{{*/
@@ -1246,37 +1246,48 @@ bool Search(CommandLine &CmdL)
       return false;
    }
    
-   ExDescFile *DFList = new ExDescFile[Cache->HeaderP->GroupCount+1];
-   memset(DFList, 0, sizeof(*DFList) * (Cache->HeaderP->GroupCount + 1));
+   size_t const descCount = Cache->HeaderP->GroupCount + 1;
+   ExDescFile *DFList = new ExDescFile[descCount];
+   memset(DFList,0,sizeof(*DFList) * descCount);
+
+   bool PatternMatch[descCount * NumPatterns];
+   memset(PatternMatch,false,sizeof(PatternMatch));
 
    // Map versions that we want to write out onto the VerList array.
    for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() == false; ++G)
    {
-      if (DFList[G->ID].NameMatch == true)
-	 continue;
-
-      DFList[G->ID].NameMatch = true;
-      for (unsigned I = 0; I != NumPatterns; I++)
+      size_t const PatternOffset = G->ID * NumPatterns;
+      size_t unmatched = 0, matched = 0;
+      for (unsigned I = 0; I < NumPatterns; ++I)
       {
-	 if (regexec(&Patterns[I],G.Name(),0,0,0) == 0)
-	    continue;
-	 DFList[G->ID].NameMatch = false;
-	 break;
+	 if (PatternMatch[PatternOffset + I] == true)
+	    ++matched;
+	 else if (regexec(&Patterns[I],G.Name(),0,0,0) == 0)
+	    PatternMatch[PatternOffset + I] = true;
+	 else
+	    ++unmatched;
       }
-        
-      // Doing names only, drop any that dont match..
-      if (NamesOnly == true && DFList[G->ID].NameMatch == false)
+
+      // already dealt with this package?
+      if (matched == NumPatterns)
 	 continue;
-	 
+
+      // Doing names only, drop any that don't match..
+      if (NamesOnly == true && unmatched == NumPatterns)
+	 continue;
+
       // Find the proper version to use
       pkgCache::PkgIterator P = G.FindPreferredPkg();
       if (P.end() == true)
 	 continue;
       pkgCache::VerIterator V = Plcy->GetCandidateVer(P);
       if (V.end() == false)
+      {
 	 DFList[G->ID].Df = V.TranslatedDescription().FileList();
+	 DFList[G->ID].ID = G->ID;
+      }
 
-      if (DFList[G->ID].NameMatch == false)
+      if (unmatched == NumPatterns)
 	 continue;
 
       // Include all the packages that provide matching names too
@@ -1288,33 +1299,45 @@ bool Search(CommandLine &CmdL)
 
 	 unsigned long id = Prv.OwnerPkg().Group()->ID;
 	 DFList[id].Df = V.TranslatedDescription().FileList();
-	 DFList[id].NameMatch = true;
+	 DFList[id].ID = id;
+
+	 size_t const PrvPatternOffset = id * NumPatterns;
+	 for (unsigned I = 0; I < NumPatterns; ++I)
+	    PatternMatch[PrvPatternOffset + I] = PatternMatch[PatternOffset + I];
       }
    }
-   
+
    LocalitySort(&DFList->Df,Cache->HeaderP->GroupCount,sizeof(*DFList));
 
    // Create the text record parser
    pkgRecords Recs(*Cache);
    // Iterate over all the version records and check them
-   for (ExDescFile *J = DFList; J->Df != 0; J++)
+   for (ExDescFile *J = DFList; J->Df != 0; ++J)
    {
       pkgRecords::Parser &P = Recs.Lookup(pkgCache::DescFileIterator(*Cache,J->Df));
+      size_t const PatternOffset = J->ID * NumPatterns;
 
-      if (J->NameMatch == false && NamesOnly == false)
+      if (NamesOnly == false)
       {
 	 string const LongDesc = P.LongDesc();
-	 J->NameMatch = true;
-	 for (unsigned I = 0; I != NumPatterns; I++)
+	 for (unsigned I = 0; I < NumPatterns; ++I)
 	 {
-	    if (regexec(&Patterns[I],LongDesc.c_str(),0,0,0) == 0)
+	    if (PatternMatch[PatternOffset + I] == true)
 	       continue;
-	    J->NameMatch = false;
-	    break;
+	    else if (regexec(&Patterns[I],LongDesc.c_str(),0,0,0) == 0)
+	       PatternMatch[PatternOffset + I] = true;
 	 }
       }
-      
-      if (J->NameMatch == true)
+
+      bool matchedAll = true;
+      for (unsigned I = 0; I < NumPatterns; ++I)
+	 if (PatternMatch[PatternOffset + I] == false)
+	 {
+	    matchedAll = false;
+	    break;
+	 }
+
+      if (matchedAll == true)
       {
 	 if (ShowFull == true)
 	 {
-- 
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