headers/private/package/HashableString.h

   1 /*
   2  * Copyright 2011, Oliver Tappe <zooey@hirschkaefer.de>
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _PACKAGE__PRIVATE__HASHABLE_STRING_H_
   6 #define _PACKAGE__PRIVATE__HASHABLE_STRING_H_
   7
   8
   9 #include <String.h>
  10
  11 #include <HashString.h>
  12
  13
  14 namespace BPackageKit {
  15
  16 namespace BPrivate {
  17
  18
  19 class HashableString : public BString {
  20 public:
  21         inline                                          HashableString();
  22
  23         inline                                          HashableString(const BString& string);
  24
  25         inline  uint32                          GetHashCode() const;
  26
  27         inline  bool                            operator!= (const HashableString& other) const;
  28
  29 private:
  30                         uint32                          fHashCode;
  31 };
  32
  33
  34 inline
  35 HashableString::HashableString()
  36         :
  37         fHashCode(0)
  38 {
  39 }
  40
  41
  42 inline
  43 HashableString::HashableString(const BString& string)
  44         :
  45         BString(string),
  46         fHashCode(string_hash(String()))
  47 {
  48 }
  49
  50
  51 inline uint32
  52 HashableString::GetHashCode() const
  53 {
  54         return fHashCode;
  55 }
  56
  57
  58 inline bool
  59 HashableString::operator!= (const HashableString& other) const
  60 {
  61         return Compare(other) != 0 || fHashCode != other.fHashCode;
  62 }
  63
  64
  65 }       // namespace BPrivate
  66
  67 }       // namespace BPackageKit
  68
  69
  70 #endif // _PACKAGE__PRIVATE__HASHABLE_STRING_H_