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+/*
+ **********************************************************************
+ * Copyright (c) 2001-2007, International Business Machines
+ * Corporation and others. All Rights Reserved.
+ **********************************************************************
+ * Date Name Description
+ * 11/20/2001 aliu Creation.
+ **********************************************************************
+ */
+#ifndef UNESCTRN_H
+#define UNESCTRN_H
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_TRANSLITERATION
+
+#include "unicode/translit.h"
+
+U_NAMESPACE_BEGIN
+
+/**
+ * A transliterator that converts Unicode escape forms to the
+ * characters they represent. Escape forms have a prefix, a suffix, a
+ * radix, and minimum and maximum digit counts.
+ *
+ * <p>This class is package private. It registers several standard
+ * variants with the system which are then accessed via their IDs.
+ *
+ * @author Alan Liu
+ */
+class UnescapeTransliterator : public Transliterator {
+
+ private:
+
+ /**
+ * The encoded pattern specification. The pattern consists of
+ * zero or more forms. Each form consists of a prefix, suffix,
+ * radix, minimum digit count, and maximum digit count. These
+ * values are stored as a five character header. That is, their
+ * numeric values are cast to 16-bit characters and stored in the
+ * string. Following these five characters, the prefix
+ * characters, then suffix characters are stored. Each form thus
+ * takes n+5 characters, where n is the total length of the prefix
+ * and suffix. The end is marked by a header of length one
+ * consisting of the character END.
+ */
+ UChar* spec; // owned; may not be NULL
+
+ public:
+
+ /**
+ * Registers standard variants with the system. Called by
+ * Transliterator during initialization.
+ */
+ static void registerIDs();
+
+ /**
+ * Constructor. Takes the encoded spec array (does not adopt it).
+ * @param ID the string identifier for this transliterator
+ * @param spec the encoded spec array
+ */
+ UnescapeTransliterator(const UnicodeString& ID,
+ const UChar *spec);
+
+ /**
+ * Copy constructor.
+ */
+ UnescapeTransliterator(const UnescapeTransliterator&);
+
+ /**
+ * Destructor.
+ */
+ virtual ~UnescapeTransliterator();
+
+ /**
+ * Transliterator API.
+ */
+ virtual Transliterator* clone() const;
+
+ /**
+ * ICU "poor man's RTTI", returns a UClassID for the actual class.
+ */
+ virtual UClassID getDynamicClassID() const;
+
+ /**
+ * ICU "poor man's RTTI", returns a UClassID for this class.
+ */
+ U_I18N_API static UClassID U_EXPORT2 getStaticClassID();
+
+ protected:
+
+ /**
+ * Implements {@link Transliterator#handleTransliterate}.
+ * @param text the buffer holding transliterated and
+ * untransliterated text
+ * @param offset the start and limit of the text, the position
+ * of the cursor, and the start and limit of transliteration.
+ * @param incremental if true, assume more text may be coming after
+ * pos.contextLimit. Otherwise, assume the text is complete.
+ */
+ virtual void handleTransliterate(Replaceable& text, UTransPosition& offset,
+ UBool isIncremental) const;
+
+};
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_TRANSLITERATION */
+
+#endif