94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
/*
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* Copyright © {1999}, International Business Machines Corporation and others. All Rights Reserved.
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**********************************************************************
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* Date Name Description
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* 11/17/99 aliu Creation.
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**********************************************************************
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*/
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#ifndef HEXTOUNI_H
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#define HEXTOUNI_H
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#include "translit.h"
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/**
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* A transliterator that converts from hexadecimal Unicode
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* escape sequences to the characters they represent. For example, "U+0040"
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* and '\u0040'. It recognizes the
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* prefixes "U+", "u+", "\U", and "\u". Hex values may be
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* upper- or lowercase.
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*
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* <p>Copyright © IBM Corporation 1999. All rights reserved.
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*
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* @author Alan Liu
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* @version $RCSfile: hextouni.h,v $ $Revision: 1.3 $ $Date: 1999/12/22 22:52:18 $
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*/
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class U_I18N_API HexToUnicodeTransliterator : public Transliterator {
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/**
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* ID for this transliterator.
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*/
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static const char* _ID;
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public:
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/**
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* Constructs a transliterator.
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*/
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HexToUnicodeTransliterator(UnicodeFilter* adoptedFilter = 0);
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/**
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* Destructor.
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*/
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virtual ~HexToUnicodeTransliterator();
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/**
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* Copy constructor.
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*/
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HexToUnicodeTransliterator(const HexToUnicodeTransliterator&);
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/**
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* Assignment operator.
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*/
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HexToUnicodeTransliterator& operator=(const HexToUnicodeTransliterator&);
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/**
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* Transliterator API.
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*/
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Transliterator* clone(void) const;
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/**
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* Transliterates a segment of a string. <code>Transliterator</code> API.
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* @param text the string to be transliterated
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* @param start the beginning index, inclusive; <code>0 <= start
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* <= limit</code>.
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* @param limit the ending index, exclusive; <code>start <= limit
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* <= text.length()</code>.
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* @return the new limit index
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*/
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virtual int32_t transliterate(Replaceable &text,
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int32_t start, int32_t limit) const;
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/**
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* Implements {@link Transliterator#handleKeyboardTransliterate}.
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*/
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virtual void handleKeyboardTransliterate(Replaceable& text,
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int32_t offsets[3]) const;
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/**
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* Return the length of the longest context required by this transliterator.
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* This is <em>preceding</em> context.
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* @param direction either <code>FORWARD</code> or <code>REVERSE</code>
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* @return maximum number of preceding context characters this
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* transliterator needs to examine
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*/
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virtual int32_t getMaximumContextLength(void) const;
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private:
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UChar filteredCharAt(Replaceable& text, int32_t i) const;
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};
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inline HexToUnicodeTransliterator::~HexToUnicodeTransliterator() {}
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#endif
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