367 lines
8.5 KiB
C++
367 lines
8.5 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1993.
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//
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// File: fbstr.cxx
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//
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// Contents: Wrappers around BSTR api to account for wierdness with NULL
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//
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// Functions: ADsAllocString
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// ADsAllocStringLen
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// ADsReAllocString
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// ADsReAllocStringLen
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// ADsFreeString
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// ADsStringLen
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// ADsStringByteLen
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// ADsAllocStringByteLen
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// ADsStringCmp
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// ADsStringNCmp
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// ADsStringICmp
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// ADsStringNICmp
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//
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// History: 25-Oct-94 krishnag
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//
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//
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//----------------------------------------------------------------------------
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#include "procs.hxx"
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//+---------------------------------------------------------------------------
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//
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// Function: ADsAllocString
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//
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// Synopsis: Allocs a BSTR and initializes it from a string. If the
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// initializer is NULL or the empty string, the resulting bstr is
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// NULL.
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//
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// Arguments: [pch] -- String to initialize BSTR.
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// [pBSTR] -- The result.
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//
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// Returns: HRESULT.
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//
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// Modifies: [pBSTR]
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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STDAPI
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ADsAllocString(const OLECHAR * pch, BSTR * pBSTR)
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{
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HRESULT hr = S_OK;
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ADsAssert(pBSTR);
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if (!pch)
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{
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*pBSTR = NULL;
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return S_OK;
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}
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*pBSTR = SysAllocString(pch);
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hr = (*pBSTR) ? S_OK : E_OUTOFMEMORY;
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RRETURN(hr);
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsAllocStringLen
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//
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// Synopsis: Allocs a BSTR of [uc] + 1 OLECHARS, and
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// initializes it from an optional string. If [uc] == 0, the
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// resulting bstr is NULL.
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//
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// Arguments: [pch] -- String to initialize.
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// [uc] -- Count of characters of string.
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// [pBSTR] -- The result.
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//
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// Returns: HRESULT.
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//
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// Modifies: [pBSTR].
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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STDAPI
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ADsAllocStringLen(const OLECHAR * pch, UINT uc, BSTR * pBSTR)
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{
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HRESULT hr = S_OK;
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ADsAssert(pBSTR);
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if (!pch){
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*pBSTR = NULL;
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return S_OK;
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}
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*pBSTR = SysAllocStringLen(pch, uc);
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hr = *pBSTR ? S_OK : E_OUTOFMEMORY;
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RRETURN(hr);
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsReAllocString
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//
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// Synopsis: Allocates a BSTR initialized from a string; if successful,
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// frees the original string and replaces it.
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//
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// Arguments: [pBSTR] -- String to reallocate.
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// [pch] -- Initializer.
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//
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// Returns: HRESULT.
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//
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// Modifies: [pBSTR].
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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STDAPI
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ADsReAllocString(BSTR * pBSTR, const OLECHAR * pch)
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{
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ADsAssert(pBSTR);
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#if DBG == 1
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HRESULT hr;
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BSTR bstrTmp;
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hr = ADsAllocString(pch, &bstrTmp);
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if (hr)
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RRETURN(hr);
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ADsFreeString(*pBSTR);
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*pBSTR = bstrTmp;
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return S_OK;
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#else
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if (!pch){
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SysFreeString(*pBSTR);
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*pBSTR = NULL;
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return S_OK;
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}
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return SysReAllocString(pBSTR, pch) ? S_OK : E_OUTOFMEMORY;
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#endif
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsReAllocStringLen
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//
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// Synopsis: Allocates a BSTR of [uc] + 1 OLECHARs and optionally
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// initializes it from a string; if successful, frees the original
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// string and replaces it.
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//
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// Arguments: [pBSTR] -- String to reallocate.
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// [pch] -- Initializer.
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// [uc] -- Count of characters.
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//
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// Returns: HRESULT.
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//
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// Modifies: [pBSTR].
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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STDAPI
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ADsReAllocStringLen(BSTR * pBSTR, const OLECHAR * pch, UINT uc)
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{
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ADsAssert(pBSTR);
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#if DBG == 1
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HRESULT hr;
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BSTR bstrTmp;
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hr = ADsAllocStringLen(pch, uc, &bstrTmp);
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if (hr)
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RRETURN(hr);
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ADsFreeString(*pBSTR);
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*pBSTR = bstrTmp;
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return S_OK;
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#else
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if (!pch){
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SysFreeString(*pBSTR);
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*pBSTR = NULL;
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return S_OK;
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}
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return SysReAllocStringLen(pBSTR, pch, uc) ? S_OK : E_OUTOFMEMORY;
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#endif
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsStringLen
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//
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// Synopsis: Returns the length of the BSTR.
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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STDAPI_(UINT)
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ADsStringLen(BSTR bstr)
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{
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return bstr ? SysStringLen(bstr) : 0;
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}
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#ifdef WIN32
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//+---------------------------------------------------------------------------
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//
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// Function: ADsStringByteLen
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//
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// Synopsis: Returns the length of a BSTR in bytes.
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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STDAPI_(UINT)
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ADsStringByteLen(BSTR bstr)
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{
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return bstr ? SysStringByteLen(bstr) : 0;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsAllocStringByteLen
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//
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// Synopsis: Allocates a BSTR of [uc] + 1 chars and optionally initializes
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// from a string. If [uc] = 0, the resulting bstr is NULL.
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//
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// Arguments: [pch] -- Initializer.
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// [uc] -- Count of chars.
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// [pBSTR] -- Result.
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//
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// Returns: HRESULT.
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//
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// Modifies: [pBSTR].
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//
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// History: 5-06-94 adams Created
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//
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//----------------------------------------------------------------------------
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STDAPI
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ADsAllocStringByteLen(const char * pch, UINT uc, BSTR * pBSTR)
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{
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HRESULT hr = S_OK;
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ADsAssert(pBSTR);
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if (!pch){
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*pBSTR = NULL;
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return S_OK;
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}
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*pBSTR = SysAllocStringByteLen(pch, uc);
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RRETURN(hr);
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}
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#endif
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//+---------------------------------------------------------------------------
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//
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// Function: ADsStringCmp
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//
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// Synopsis: As per wcscmp, checking for NULL bstrs.
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//
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// History: 5-06-94 adams Created
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// 25-Jun-94 doncl changed from _tc to wc
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//
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//----------------------------------------------------------------------------
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STDAPI_(int)
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ADsStringCmp(CBSTR bstr1, CBSTR bstr2)
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{
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return wcscmp(STRVAL(bstr1), STRVAL(bstr2));
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsStringNCmp
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//
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// Synopsis: As per wcsncmp, checking for NULL bstrs.
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//
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// History: 5-06-94 adams Created
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// 25-Jun-94 doncl changed from _tc to wc
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//
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//----------------------------------------------------------------------------
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STDAPI_(int)
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ADsStringNCmp(CBSTR bstr1, CBSTR bstr2, size_t c)
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{
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return wcsncmp(STRVAL(bstr1), STRVAL(bstr2), c);
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsStringICmp
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//
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// Synopsis: As per wcsicmp, checking for NULL bstrs.
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//
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// History: 5-06-94 adams Created
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// 25-Jun-94 doncl changed from _tc to wc
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// 15-Aug-94 doncl changed from wcsicmp to _wcsicmp
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//
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//----------------------------------------------------------------------------
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STDAPI_(int)
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ADsStringICmp(CBSTR bstr1, CBSTR bstr2)
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{
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return _wcsicmp(STRVAL(bstr1), STRVAL(bstr2));
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ADsStringNICmp
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//
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// Synopsis: As per wcsnicmp, checking for NULL bstrs.
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//
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// History: 5-06-94 adams Created
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// 25-Jun-94 doncl changed from _tc to wc
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// 15-Aug-94 doncl changed from wcsnicmp to _wcsnicmp
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//
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//----------------------------------------------------------------------------
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STDAPI_(int)
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ADsStringNICmp(CBSTR bstr1, CBSTR bstr2, size_t c)
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{
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return _wcsnicmp(STRVAL(bstr1), STRVAL(bstr2), c);
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}
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