headers/private/storage/sniffer/Rule.h

   1 //----------------------------------------------------------------------
   2 //  This software is part of the OpenBeOS distribution and is covered
   3 //  by the MIT License.
   4 //---------------------------------------------------------------------
   5 /*!
   6         \file sniffer/Rule.h
   7         Mime sniffer rule declarations
   8 */
   9 #ifndef _SNIFFER_RULE_H
  10 #define _SNIFFER_RULE_H
  11
  12 #include <SupportDefs.h>
  13
  14 #include <sys/types.h>
  15 #include <vector>
  16
  17 class BPositionIO;
  18
  19 namespace BPrivate {
  20 namespace Storage {
  21 namespace Sniffer {
  22
  23 class DisjList;
  24
  25 /*! \brief A priority and a list of expressions to be used for sniffing out the
  26         type of an untyped file.
  27 */
  28 class Rule {
  29 public:
  30         Rule();
  31         ~Rule();
  32
  33         status_t InitCheck() const;
  34         double Priority() const;
  35         bool Sniff(BPositionIO *data) const;
  36         ssize_t BytesNeeded() const;
  37 private:
  38         friend class Parser;
  39
  40         void Unset();
  41         void SetTo(double priority, std::vector<DisjList*>* list);
  42
  43         double fPriority;
  44         std::vector<DisjList*> *fConjList;      // A list of DisjLists to be ANDed
  45 };
  46
  47 };      // namespace Sniffer
  48 };      // namespace Storage
  49 };      // namespace BPrivate
  50
  51 #endif  // _SNIFFER_RULE_H
  52
  53