64 lines
2.1 KiB
C++
64 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 UMemory {
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public:
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// Constructor
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// @param str The unicode string to be converted to char *
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// @param codepage The char * code page. "" for invariant conversion.
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// NULL for default code page.
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inline CharString(const UnicodeString& str, const char *codepage = "");
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inline ~CharString();
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inline operator const char*() const { return ptr; }
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private:
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char buf[128];
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char* ptr;
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CharString(const CharString &other); // forbid copying of this class
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CharString &operator=(const CharString &other); // forbid copying of this class
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};
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inline CharString::CharString(const UnicodeString& str, const char *codepage) {
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int32_t len;
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ptr = buf;
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len = str.extract(0, 0x7FFFFFFF, buf ,sizeof(buf)-1, codepage);
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buf[sizeof(buf)-1] = 0; // extract does not add null if it thinks there is no space for it.
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if (len >= (int32_t)(sizeof(buf)-1)) {
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ptr = (char *)uprv_malloc(len+1);
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str.extract(0, 0x7FFFFFFF, ptr, len+1, codepage);
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}
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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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