headers/private/storage/sniffer/Pattern.h

   1 //----------------------------------------------------------------------
   2 //  This software is part of the OpenBeOS distribution and is covered
   3 //  by the MIT License.
   4 //---------------------------------------------------------------------
   5 /*!
   6         \file sniffer/Pattern.h
   7         Mime Sniffer Pattern declarations
   8 */
   9 #ifndef _SNIFFER_PATTERN_H
  10 #define _SNIFFER_PATTERN_H
  11
  12 #include <SupportDefs.h>
  13 #include <string>
  14 #include <sniffer/Range.h>
  15
  16 class BPositionIO;
  17
  18 namespace BPrivate {
  19 namespace Storage {
  20 namespace Sniffer {
  21
  22 class Err;
  23
  24 //! A byte string and optional mask to be compared against a data stream.
  25 /*! The byte string and mask (if supplied) must be of the same length. */
  26 class Pattern {
  27 public:
  28         Pattern(const std::string &string, const std::string &mask);
  29         Pattern(const std::string &string);
  30         ~Pattern();
  31
  32         status_t InitCheck() const;
  33         Err* GetErr() const;
  34
  35         bool Sniff(Range range, BPositionIO *data, bool caseInsensitive) const;
  36         ssize_t BytesNeeded() const;
  37
  38         status_t SetTo(const std::string &string, const std::string &mask);
  39 private:
  40         bool Sniff(off_t start, off_t size, BPositionIO *data, bool caseInsensitive) const;
  41
  42         void SetStatus(status_t status, const char *msg = NULL);
  43         void SetErrorMessage(const char *msg);
  44
  45         std::string fString;
  46         std::string fMask;
  47
  48         status_t fCStatus;
  49         Err *fErrorMessage;
  50 };
  51
  52 };      // namespace Sniffer
  53 };      // namespace Storage
  54 };      // namespace BPrivate
  55
  56 #endif  // _SNIFFER_PATTERN_H
  57
  58