311 lines
7.5 KiB
C
311 lines
7.5 KiB
C
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//=======================================================================
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//
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// Copyright (c) 1998-2000 Microsoft Corporation. All Rights Reserved.
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//
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// File: MemUtil.h
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// Author: Charles Ma, 10/13/2000
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//
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// Revision History:
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//
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//
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//
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// Description:
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//
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// IU memory utility library
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//
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//=======================================================================
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#ifndef __MEM_UTIL_HEADER__
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#include <ole2.h>
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//
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// declare a class that handles the heap memory smartly, free itself.
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// you should not use this class directly. Use the macros defined
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// below this class instead.
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//
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class CSmartHeapMem
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{
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public:
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//
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// constructor/destructor
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//
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CSmartHeapMem();
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~CSmartHeapMem();
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LPVOID Alloc(
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size_t nBytes,
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DWORD dwFlags = HEAP_ZERO_MEMORY
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);
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LPVOID ReAlloc(
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LPVOID lpMem,
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size_t nBytes,
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DWORD dwFlags = HEAP_ZERO_MEMORY
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);
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size_t Size(
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LPVOID lpMem
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);
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void FreeAllocatedMem(
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LPVOID lpMem
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);
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private:
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HANDLE m_Heap;
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LPVOID* m_lppMems;
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size_t m_ArraySize;
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int GetUnusedArraySlot();
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inline int FindIndex(LPVOID pMem);
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};
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// *******************************************************************************
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//
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// MACROs to utlize class CSmartHeapMem to provide you a "smart pointer"
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// type of memory management based on Heap memory.
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//
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// Restriction:
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// HEAP_GENERATE_EXCEPTIONS and HEAP_NO_SERIALIZE flags are ignored
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//
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// *******************************************************************************
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//
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// similar to ATL USES_CONVERSION, this macro declares
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// that within this block you want to use CSmartHeapMem feature
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//
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#define USES_MY_MEMORY CSmartHeapMem mem;
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//
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// allocate a pc of memory, e.g.:
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// LPTSTR t = (LPTSTR) MemAlloc(30*sizeof(TCHAR));
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//
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#define MemAlloc mem.Alloc
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//
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// re-allocate a pc of memory, e.g.:
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// t = (LPTSTR) MemReAlloc(t, MemSize(t) * 2, HEAP_REALLOC_IN_PLACE_ONLY);
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//
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#define MemReAlloc mem.ReAlloc
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//
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// macro to return the memory size allocated:
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// size_t nBytes = MemSize(t);
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//
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#define MemSize mem.Size
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//
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// macro to free a pc of memory allocated by MemAlloc or MemReAlloc, e.g.:
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// MemFree(t);
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// You only need to do this when you want to re-use this pointer to
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// call MemAlloc() repeatedly, such as, in a loop. In normal cases,
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// memory allocated by these two macros will be freed automatically
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// when control goes out of the current scope.
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//
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#define MemFree mem.FreeAllocatedMem
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#define SafeMemFree(p) if (NULL != p) { MemFree(p); p = NULL; }
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// *******************************************************************************
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//
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// Duplicate USES_CONVERSION, but remove dependency on
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// CRT memory function_alloca()
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//
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// *******************************************************************************
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#define USES_IU_CONVERSION int _convert = 0; \
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_convert; UINT _acp = CP_ACP; _acp; \
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USES_MY_MEMORY; \
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LPCWSTR _lpw = NULL; _lpw; LPCSTR _lpa = NULL; _lpa
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//
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// NTRAID#NTBUG9-260079-2001/03/08-waltw PREFIX: Dereferencing NULL lpw.
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// NTRAID#NTBUG9-260080-2001/03/08-waltw PREFIX: Dereferencing NULL lpw.
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//
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inline LPWSTR WINAPI AtlA2WHelper(LPWSTR lpw, LPCSTR lpa, int nChars, UINT acp)
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{
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//
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// verify that no illegal character present
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// since lpw was allocated based on the size of lpa
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// don't worry about the number of chars
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//
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if (lpw)
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{
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lpw[0] = '\0';
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MultiByteToWideChar(acp, 0, lpa, -1, lpw, nChars);
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}
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return lpw;
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}
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//
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// NTRAID#NTBUG9-260083-2001/03/08-waltw PREFIX: Dereferencing NULL lpa.
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//
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inline LPSTR WINAPI AtlW2AHelper(LPSTR lpa, LPCWSTR lpw, int nChars, UINT acp)
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{
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//
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// verify that no illegal character present
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// since lpa was allocated based on the size of lpw
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// don't worry about the number of chars
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//
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if (lpa)
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{
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lpa[0] = '\0';
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WideCharToMultiByte(acp, 0, lpw, -1, lpa, nChars, NULL, NULL);
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}
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return lpa;
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}
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inline LPWSTR WINAPI AtlA2WHelper(LPWSTR lpw, LPCSTR lpa, int nChars)
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{
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return AtlA2WHelper(lpw, lpa, nChars, CP_ACP);
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}
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inline LPSTR WINAPI AtlW2AHelper(LPSTR lpa, LPCWSTR lpw, int nChars)
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{
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return AtlW2AHelper(lpa, lpw, nChars, CP_ACP);
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}
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#ifdef _CONVERSION_USES_THREAD_LOCALE
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#ifdef ATLA2WHELPER
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#undef ATLA2WHELPER
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#undef ATLW2AHELPER
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#endif
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#define ATLA2WHELPER AtlA2WHelper
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#define ATLW2AHELPER AtlW2AHelper
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#else
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#ifndef ATLA2WHELPER
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#define ATLA2WHELPER AtlA2WHelper
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#define ATLW2AHELPER AtlW2AHelper
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#endif
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#endif
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#define A2W(lpa) (\
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((_lpa = lpa) == NULL) ? NULL : (\
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_convert = (lstrlenA(_lpa)+1),\
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AtlA2WHelper((LPWSTR)MemAlloc(_convert*2), _lpa, _convert, CP_ACP)))
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#define W2A(lpw) (\
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((_lpw = lpw) == NULL) ? NULL : (\
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_convert = (lstrlenW(_lpw)+1)*2,\
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AtlW2AHelper((LPSTR)MemAlloc(_convert), _lpw, _convert, CP_ACP)))
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#define A2CW(lpa) ((LPCWSTR)A2W(lpa))
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#define W2CA(lpw) ((LPCSTR)W2A(lpw))
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#ifdef OLE2ANSI
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inline LPOLESTR A2OLE(LPSTR lp) { return lp;}
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inline LPSTR OLE2A(LPOLESTR lp) { return lp;}
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#define W2OLE W2A
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#define OLE2W A2W
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inline LPCOLESTR A2COLE(LPCSTR lp) { return lp;}
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inline LPCSTR OLE2CA(LPCOLESTR lp) { return lp;}
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#define W2COLE W2CA
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#define OLE2CW A2CW
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#else
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inline LPOLESTR W2OLE(LPWSTR lp) { return lp; }
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inline LPWSTR OLE2W(LPOLESTR lp) { return lp; }
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#define A2OLE A2W
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#define OLE2A W2A
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inline LPCOLESTR W2COLE(LPCWSTR lp) { return lp; }
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inline LPCWSTR OLE2CW(LPCOLESTR lp) { return lp; }
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#define A2COLE A2CW
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#define OLE2CA W2CA
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#endif
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#ifdef _UNICODE
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#define T2A W2A
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#define A2T A2W
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inline LPWSTR T2W(LPTSTR lp) { return lp; }
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inline LPTSTR W2T(LPWSTR lp) { return lp; }
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#define T2CA W2CA
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#define A2CT A2CW
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inline LPCWSTR T2CW(LPCTSTR lp) { return lp; }
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inline LPCTSTR W2CT(LPCWSTR lp) { return lp; }
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#else
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#define T2W A2W
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#define W2T W2A
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inline LPSTR T2A(LPTSTR lp) { return lp; }
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inline LPTSTR A2T(LPSTR lp) { return lp; }
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#define T2CW A2CW
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#define W2CT W2CA
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inline LPCSTR T2CA(LPCTSTR lp) { return lp; }
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inline LPCTSTR A2CT(LPCSTR lp) { return lp; }
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#endif
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#define OLE2T W2T
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#define OLE2CT W2CT
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#define T2OLE T2W
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#define T2COLE T2CW
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inline BSTR A2WBSTR(LPCSTR lp, int nLen = -1)
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{
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USES_IU_CONVERSION;
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BSTR str = NULL;
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int nConvertedLen = MultiByteToWideChar(_acp, 0, lp,
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nLen, NULL, NULL)-1;
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str = ::SysAllocStringLen(NULL, nConvertedLen);
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if (str != NULL)
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{
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MultiByteToWideChar(_acp, 0, lp, -1,
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str, nConvertedLen);
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}
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return str;
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}
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inline BSTR OLE2BSTR(LPCOLESTR lp) {return ::SysAllocString(lp);}
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#if defined(_UNICODE)
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// in these cases the default (TCHAR) is the same as OLECHAR
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inline BSTR T2BSTR(LPCTSTR lp) {return ::SysAllocString(lp);}
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inline BSTR A2BSTR(LPCSTR lp) {USES_IU_CONVERSION; return A2WBSTR(lp);}
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inline BSTR W2BSTR(LPCWSTR lp) {return ::SysAllocString(lp);}
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#elif defined(OLE2ANSI)
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// in these cases the default (TCHAR) is the same as OLECHAR
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inline BSTR T2BSTR(LPCTSTR lp) {return ::SysAllocString(lp);}
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inline BSTR A2BSTR(LPCSTR lp) {return ::SysAllocString(lp);}
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inline BSTR W2BSTR(LPCWSTR lp) {USES_IU_CONVERSION; return ::SysAllocString(W2COLE(lp));}
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#else
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inline BSTR T2BSTR(LPCTSTR lp) {USES_IU_CONVERSION; return A2WBSTR(lp);}
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inline BSTR A2BSTR(LPCSTR lp) {USES_IU_CONVERSION; return A2WBSTR(lp);}
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inline BSTR W2BSTR(LPCWSTR lp) {return ::SysAllocString(lp);}
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#endif
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// *******************************************************************************
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//
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// Other memory related functions
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//
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// *******************************************************************************
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//
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// implemenation of CRT memcpy() function
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//
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LPVOID MyMemCpy(LPVOID dest, const LPVOID src, size_t nBytes);
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//
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// allocate heap mem and copy
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//
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LPVOID HeapAllocCopy(LPVOID src, size_t nBytes);
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#define __MEM_UTIL_HEADER__
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#endif //__MEM_UTIL_HEADER__
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