77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/*
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**********************************************************************
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* Copyright (c) 2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Date Name Description
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* 11/19/2001 aliu Creation.
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**********************************************************************
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*/
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#include "unicode/utypes.h"
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#include "unicode/uobject.h"
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#include "unicode/unistr.h"
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#include "cmemory.h"
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//--------------------------------------------------------------------
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// class CharString
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//
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// This is a tiny wrapper class that is used internally to make a
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// UnicodeString look like a const char*. It can be allocated on the
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// stack. It only creates a heap buffer if it needs to.
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//--------------------------------------------------------------------
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U_NAMESPACE_BEGIN
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class U_COMMON_API CharString : public UObject {
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public:
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inline CharString(const UnicodeString& str);
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inline ~CharString();
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inline operator const char*() { return ptr; }
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/**
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* ICU "poor man's RTTI", returns a UClassID for the actual class.
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*
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* @draft ICU 2.2
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*/
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virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
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/**
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* ICU "poor man's RTTI", returns a UClassID for this class.
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*
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* @draft ICU 2.2
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*/
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static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
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private:
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char buf[128];
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char* ptr;
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/**
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* The address of this static class variable serves as this class's ID
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* for ICU "poor man's RTTI".
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*/
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static const char fgClassID;
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};
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inline CharString::CharString(const UnicodeString& str) {
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// TODO This isn't quite right -- we should probably do
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// preflighting here to determine the real length.
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if (str.length() >= (int32_t)sizeof(buf)) {
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ptr = (char *)uprv_malloc(str.length() + 8);
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} else {
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ptr = buf;
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}
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str.extract(0, 0x7FFFFFFF, ptr, "");
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}
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inline CharString::~CharString() {
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if (ptr != buf) {
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uprv_free(ptr);
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}
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}
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U_NAMESPACE_END
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//eof
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