[英]Will it cause memory leak or segfault when using CString
我有以下示例代码:
CString CHttpsClient::converEncoding(LPWSTR originalString, long encodingType)
{
if (encodingType == CP_ACP) {
return CString(originalString);
}
CString ret;
int nBufferSize = MultiByteToWideChar(encodingType, 0, (LPCCH)originalString, -1, NULL, 0);
wchar_t *pBuffer = (wchar_t*)malloc(nBufferSize * sizeof(wchar_t));
MultiByteToWideChar(CP_UTF8, 0, (LPCCH)originalString, -1, pBuffer, nBufferSize * sizeof(wchar_t));
ret = CString(pBuffer);
free(pBuffer);
return ret;
}
我的问题是当我调用这个方法时,我已经释放了 pBuffer 的 memory,但是这个 pBuffer 仍然作为 CString(pBuffer) 返回,这样使用 CString 时会导致 memory 泄漏或段错误吗?
所以,我应该这样使用它,对吧?:
void CHttpsClient::converEncoding(CString& result, LPWSTR originalString, long encodingType)
{
if (encodingType == CP_ACP) {
return;
}
int nBufferSize = MultiByteToWideChar(encodingType, 0, (LPCCH)originalString, -1, NULL, 0);
wchar_t *pBuf = result.GetBuffer(nBufferSize * sizeof(wchar_t));
MultiByteToWideChar(CP_UTF8, 0, (LPCCH)originalString, -1, pBuf, nBufferSize * sizeof(wchar_t));
}
void CHttpsClient::someMethod(){
CString text = _T("");
converEncoding(text, _T("Hello StackOverflow"), utf-8);
text.ReleaseBuffer();
}
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