appendable.h

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*   Copyright (C) 2011-2012, International Business Machines
*   Corporation and others.  All Rights Reserved.
*******************************************************************************
*   file name:  appendable.h
*   encoding:   UTF-8
*   tab size:   8 (not used)
*   indentation:4
*
*   created on: 2010dec07
*   created by: Markus W. Scherer
*/
 
#ifndef __APPENDABLE_H__
#define __APPENDABLE_H__
 
#include "unicode/utypes.h"
 
#if U_SHOW_CPLUSPLUS_API
 
#include "unicode/uobject.h"
 
U_NAMESPACE_BEGIN
 
class UnicodeString;
 
class U_COMMON_API Appendable : public UObject {
public:
    ~Appendable();
 
    virtual UBool appendCodeUnit(char16_t c) = 0;
 
    virtual UBool appendCodePoint(UChar32 c);
 
    virtual UBool appendString(const char16_t *s, int32_t length);
 
    virtual UBool reserveAppendCapacity(int32_t appendCapacity);
 
    virtual char16_t *getAppendBuffer(int32_t minCapacity,
                                   int32_t desiredCapacityHint,
                                   char16_t *scratch, int32_t scratchCapacity,
                                   int32_t *resultCapacity);
};
 
class U_COMMON_API UnicodeStringAppendable : public Appendable {
public:
    explicit UnicodeStringAppendable(UnicodeString &s) : str(s) {}
 
    ~UnicodeStringAppendable();
 
    virtual UBool appendCodeUnit(char16_t c) override;
 
    virtual UBool appendCodePoint(UChar32 c) override;
 
    virtual UBool appendString(const char16_t *s, int32_t length) override;
 
    virtual UBool reserveAppendCapacity(int32_t appendCapacity) override;
 
    virtual char16_t *getAppendBuffer(int32_t minCapacity,
                                   int32_t desiredCapacityHint,
                                   char16_t *scratch, int32_t scratchCapacity,
                                   int32_t *resultCapacity) override;
 
private:
    UnicodeString &str;
};
 
U_NAMESPACE_END
 
#endif /* U_SHOW_CPLUSPLUS_API */
 
#endif  // __APPENDABLE_H__