icuSources/i18n/fphdlimp.h

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 *******************************************************************************
   5 * Copyright (C) 2009-2015, International Business Machines Corporation and    *
   6 * others. All Rights Reserved.                                                *
   7 *******************************************************************************
   8 */
   9
  10 #ifndef FPHDLIMP_H
  11 #define FPHDLIMP_H
  12
  13 #if !UCONFIG_NO_FORMATTING
  14
  15 #include "unicode/utypes.h"
  16 #include "unicode/fieldpos.h"
  17 #include "unicode/fpositer.h"
  18
  19 U_NAMESPACE_BEGIN
  20
  21 // utility FieldPositionHandler
  22 // base class, null implementation
  23
  24 class U_I18N_API FieldPositionHandler: public UMemory {
  25  protected:
  26   int32_t fShift = 0;
  27
  28  public:
  29   virtual ~FieldPositionHandler();
  30   virtual void addAttribute(int32_t id, int32_t start, int32_t limit) = 0;
  31   virtual void shiftLast(int32_t delta) = 0;
  32   virtual UBool isRecording(void) const = 0;
  33
  34   void setShift(int32_t delta);
  35 };
  36
  37
  38 // utility subclass FieldPositionOnlyHandler
  39
  40 class FieldPositionOnlyHandler : public FieldPositionHandler {
  41   FieldPosition& pos;
  42
  43  public:
  44   FieldPositionOnlyHandler(FieldPosition& pos);
  45   virtual ~FieldPositionOnlyHandler();
  46
  47   void addAttribute(int32_t id, int32_t start, int32_t limit) U_OVERRIDE;
  48   void shiftLast(int32_t delta) U_OVERRIDE;
  49   UBool isRecording(void) const U_OVERRIDE;
  50 };
  51
  52
  53 // utility subclass FieldPositionIteratorHandler
  54
  55 class FieldPositionIteratorHandler : public FieldPositionHandler {
  56   FieldPositionIterator* iter; // can be NULL
  57   UVector32* vec;
  58   UErrorCode status;
  59
  60   // Note, we keep a reference to status, so if status is on the stack, we have
  61   // to be destroyed before status goes out of scope.  Easiest thing is to
  62   // allocate us on the stack in the same (or narrower) scope as status has.
  63   // This attempts to encourage that by blocking heap allocation.
  64   void *operator new(size_t s);
  65   void *operator new[](size_t s);
  66
  67  public:
  68   FieldPositionIteratorHandler(FieldPositionIterator* posIter, UErrorCode& status);
  69   ~FieldPositionIteratorHandler();
  70
  71   void addAttribute(int32_t id, int32_t start, int32_t limit) U_OVERRIDE;
  72   void shiftLast(int32_t delta) U_OVERRIDE;
  73   UBool isRecording(void) const U_OVERRIDE;
  74 };
  75
  76 U_NAMESPACE_END
  77
  78 #endif /* !UCONFIG_NO_FORMATTING */
  79
  80 #endif /* FPHDLIMP_H */