1 files changed, 109 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/fphdlimp.h b/intl/icu/source/i18n/fphdlimp.h
new file mode 100644
index 0000000000..ad09c6c903
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+++ b/intl/icu/source/i18n/fphdlimp.h
@@ -0,0 +1,109 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2009-2015, International Business Machines Corporation and    *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*/
+
+#ifndef FPHDLIMP_H
+#define FPHDLIMP_H
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/fieldpos.h"
+#include "unicode/fpositer.h"
+#include "unicode/formattedvalue.h"
+
+U_NAMESPACE_BEGIN
+
+// utility FieldPositionHandler
+// base class, null implementation
+
+class U_I18N_API FieldPositionHandler: public UMemory {
+ protected:
+  int32_t fShift = 0;
+
+ public:
+  virtual ~FieldPositionHandler();
+  virtual void addAttribute(int32_t id, int32_t start, int32_t limit) = 0;
+  virtual void shiftLast(int32_t delta) = 0;
+  virtual UBool isRecording() const = 0;
+
+  void setShift(int32_t delta);
+};
+
+
+// utility subclass FieldPositionOnlyHandler
+
+class FieldPositionOnlyHandler : public FieldPositionHandler {
+  FieldPosition& pos;
+  UBool acceptFirstOnly = false;
+  UBool seenFirst = false;
+
+ public:
+  FieldPositionOnlyHandler(FieldPosition& pos);
+  virtual ~FieldPositionOnlyHandler();
+
+  void addAttribute(int32_t id, int32_t start, int32_t limit) override;
+  void shiftLast(int32_t delta) override;
+  UBool isRecording() const override;
+
+  /**
+   * Enable this option to lock in the FieldPosition value after seeing the
+   * first occurrence of the field. The default behavior is to take the last
+   * occurrence.
+   */
+  void setAcceptFirstOnly(UBool acceptFirstOnly);
+};
+
+
+// utility subclass FieldPositionIteratorHandler
+// exported as U_I18N_API for tests
+
+class U_I18N_API FieldPositionIteratorHandler : public FieldPositionHandler {
+  FieldPositionIterator* iter; // can be nullptr
+  UVector32* vec;
+  UErrorCode status;
+  UFieldCategory fCategory;
+
+  // Note, we keep a reference to status, so if status is on the stack, we have
+  // to be destroyed before status goes out of scope.  Easiest thing is to
+  // allocate us on the stack in the same (or narrower) scope as status has.
+  // This attempts to encourage that by blocking heap allocation.
+  static void* U_EXPORT2 operator new(size_t) noexcept = delete;
+  static void* U_EXPORT2 operator new[](size_t) noexcept = delete;
+#if U_HAVE_PLACEMENT_NEW
+  static void* U_EXPORT2 operator new(size_t, void*) noexcept = delete;
+#endif
+
+ public:
+  FieldPositionIteratorHandler(FieldPositionIterator* posIter, UErrorCode& status);
+  /** If using this constructor, you must call getError() when done formatting! */
+  FieldPositionIteratorHandler(UVector32* vec, UErrorCode& status);
+  ~FieldPositionIteratorHandler();
+
+  void addAttribute(int32_t id, int32_t start, int32_t limit) override;
+  void shiftLast(int32_t delta) override;
+  UBool isRecording() const override;
+
+  /** Copies a failed error code into _status. */
+  inline void getError(UErrorCode& _status) {
+    if (U_SUCCESS(_status) && U_FAILURE(status)) {
+      _status = status;
+    }
+  }
+
+  inline void setCategory(UFieldCategory category) {
+    fCategory = category;
+  }
+};
+
+U_NAMESPACE_END
+
+#endif /* !UCONFIG_NO_FORMATTING */
+
+#endif /* FPHDLIMP_H */