src/bin/filteredquery/FilteredQuery.h

   1 #ifndef __FILTEREDQUERY_H
   2 #define __FILTEREDQUERY_H
   3
   4 #include <Query.h>
   5
   6 #include "ObjectList.h"
   7
   8 typedef bool (*filter_function)(const entry_ref *ref, void *arg);
   9
  10 struct filter_pair {
  11         filter_function filter;
  12         void *args;
  13
  14         filter_pair(filter_function function, void *arguments)
  15         {
  16                 filter = function;
  17                 args = arguments;
  18         }
  19 };
  20
  21
  22 class TFilteredQuery : public BQuery {
  23 public:
  24         TFilteredQuery();
  25
  26         // BQuery doesn't have a copy constructor. We supply
  27         // this method to workaround this problem
  28         TFilteredQuery(const BQuery &query);
  29         TFilteredQuery(const TFilteredQuery &query);
  30         virtual ~TFilteredQuery();
  31
  32         bool AddFilter(filter_function function, void *arg);
  33         void RemoveFilter(filter_function function);
  34
  35         virtual status_t GetNextRef(entry_ref *ref);
  36         virtual status_t GetNextEntry(BEntry *entry, bool traverse = false);
  37         virtual int32 GetNextDirents(dirent *buf, size_t length, int32 count = INT_MAX);
  38
  39         status_t Clear();
  40
  41 private:
  42         BObjectList<filter_pair> fFilters;
  43 };
  44
  45 #endif //__FILTEREDQUERY_H