support regular expressions in 'apt search'

[ntk/apt.git] / apt-private / private-search.cc

// Includes								/*{{{*/
#include <config.h>

#include <apt-pkg/cachefile.h>
#include <apt-pkg/cacheset.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/pkgrecords.h>
#include <apt-pkg/policy.h>
#include <apt-pkg/progress.h>
#include <apt-pkg/cacheiterators.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/macros.h>
#include <apt-pkg/pkgcache.h>

#include <apt-private/private-cacheset.h>
#include <apt-private/private-output.h>
#include <apt-private/private-search.h>

#include <string.h>
#include <iostream>
#include <sstream>
#include <map>
#include <string>
#include <utility>

#include <apti18n.h>
									/*}}}*/

bool FullTextSearch(CommandLine &CmdL)					/*{{{*/
{
   pkgCacheFile CacheFile;
   pkgCache *Cache = CacheFile.GetPkgCache();
   pkgDepCache::Policy *Plcy = CacheFile.GetPolicy();
   pkgRecords records(CacheFile);
   if (unlikely(Cache == NULL || Plcy == NULL))
      return false;

   // Make sure there is at least one argument
   unsigned int const NumPatterns = CmdL.FileSize() -1;
   if (NumPatterns < 1)
      return _error->Error(_("You must give at least one search pattern"));

#define APT_FREE_PATTERNS() for (std::vector<regex_t>::iterator P = Patterns.begin(); \
      P != Patterns.end(); ++P) { regfree(&(*P)); }

   // Compile the regex pattern
   std::vector<regex_t> Patterns;
   for (unsigned int I = 0; I != NumPatterns; ++I)
   {
      regex_t pattern;
      if (regcomp(&pattern, CmdL.FileList[I + 1], REG_EXTENDED | REG_ICASE | REG_NOSUB) != 0)
      {
	 APT_FREE_PATTERNS();
	 return _error->Error("Regex compilation error");
      }
      Patterns.push_back(pattern);
   }

   bool const NamesOnly = _config->FindB("APT::Cache::NamesOnly", false);

   std::map<std::string, std::string> output_map;
   std::map<std::string, std::string>::const_iterator K;

   LocalitySortedVersionSet bag;
   OpTextProgress progress(*_config);
   progress.OverallProgress(0, 100, 50,  _("Sorting"));
   GetLocalitySortedVersionSet(CacheFile, bag, progress);
   LocalitySortedVersionSet::iterator V = bag.begin();

   progress.OverallProgress(50, 100, 50,  _("Full Text Search"));
   progress.SubProgress(bag.size());
   int Done = 0;
   for ( ;V != bag.end(); ++V)
   {
      if (Done%500 == 0)
         progress.Progress(Done);
      ++Done;

      pkgCache::DescIterator Desc = V.TranslatedDescription();
      pkgRecords::Parser &parser = records.Lookup(Desc.FileList());

      bool all_found = true;
      for (std::vector<regex_t>::const_iterator pattern = Patterns.begin();
	    pattern != Patterns.end(); ++pattern)
      {
	 if (regexec(&(*pattern), V.ParentPkg().Name(), 0, 0, 0) == 0)
	    continue;
	 else if (NamesOnly == false && regexec(&(*pattern), parser.LongDesc().c_str(), 0, 0, 0) == 0)
	    continue;
	 // search patterns are AND, so one failing fails all
	 all_found = false;
	 break;
      }
      if (all_found == true)
      {
            std::stringstream outs;
            ListSingleVersion(CacheFile, records, V, outs);
            output_map.insert(std::make_pair<std::string, std::string>(
                                 V.ParentPkg().Name(), outs.str()));
      }
   }
   APT_FREE_PATTERNS();
   progress.Done();

   // FIXME: SORT! and make sorting flexible (alphabetic, by pkg status)
   // output the sorted map
   for (K = output_map.begin(); K != output_map.end(); ++K)
      std::cout << (*K).second << std::endl;

   return true;
}
									/*}}}*/