intl/unicharutil/util/IrishCasing.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef IrishCasing_h_
   7 #define IrishCasing_h_
   8
   9 #include <stdint.h>
  10 #include "mozilla/Attributes.h"
  11
  12 namespace mozilla {
  13
  14 class IrishCasing {
  15 private:
  16   enum IrishStates {
  17     kState_Start,
  18     kState_InWord,
  19     kState_b,
  20     kState_bh,
  21     kState_d,
  22     kState_g,
  23     kState_h,
  24     kState_m,
  25     kState_n,
  26     kState_nt_,
  27     kState_t,
  28     kState_ts,
  29     kNumStates
  30   };
  31
  32   enum IrishClasses {
  33     kClass_b,
  34     kClass_B,
  35     kClass_cC,
  36     kClass_d,
  37     kClass_DG,
  38     kClass_fF,
  39     kClass_g,
  40     kClass_h,
  41     kClass_lLNrR,
  42     kClass_m,
  43     kClass_n,
  44     kClass_pP,
  45     kClass_sS,
  46     kClass_t,
  47     kClass_T,
  48     kClass_vowel,
  49     kClass_Vowel,
  50     kClass_hyph,
  51     kClass_letter,
  52     kClass_other,
  53     kNumClasses
  54   };
  55
  56 public:
  57   class State {
  58     friend class IrishCasing;
  59
  60   public:
  61     State()
  62       : mState(kState_Start)
  63     {
  64     }
  65
  66     MOZ_IMPLICIT State(const IrishStates& aState)
  67       : mState(aState)
  68     {
  69     }
  70
  71     void Reset()
  72     {
  73       mState = kState_Start;
  74     }
  75
  76     operator IrishStates() const
  77     {
  78       return mState;
  79     }
  80
  81   private:
  82     explicit State(uint8_t aState)
  83       : mState(IrishStates(aState))
  84     {
  85     }
  86
  87     uint8_t GetClass(uint32_t aCh);
  88
  89     IrishStates mState;
  90   };
  91
  92   enum {
  93     kMarkPositionFlag = 0x80,
  94     kActionMask       = 0x30,
  95     kActionShift      = 4,
  96     kNextStateMask    = 0x0f
  97   };
  98
  99   static const uint8_t sUppercaseStateTable[kNumClasses][kNumStates];
 100   static const uint8_t sLcClasses[26];
 101   static const uint8_t sUcClasses[26];
 102
 103   static uint32_t UpperCase(uint32_t aCh, State& aState,
 104                             bool& aMarkPos, uint8_t& aAction);
 105
 106   static bool IsUpperVowel(uint32_t aCh)
 107   {
 108     return GetClass(aCh) == kClass_Vowel;
 109   }
 110
 111 private:
 112   static uint8_t GetClass(uint32_t aCh);
 113 };
 114
 115 } // namespace mozilla
 116
 117 #endif