Source code of Windows XP (NT5)
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/*
* BSTRING.CPP
*
* Implementation of the member functions of the BSTRING C++ class. See
* BSTRING.H for the class declaration and the implementation of the inline
* member functions.
*
* Author:
* dannygl, 29 Oct 96
*/
#include "precomp.h"
#include <bstring.h>
// We don't support construction from an ANSI string in the Unicode build.
#if !defined(UNICODE)
BSTRING::BSTRING(LPCSTR lpcString)
{
// Initialize the member pointer to NULL
m_bstr = NULL;
if (NULL == lpcString)
return;
// Compute the length of the required BSTR, including the null
int cWC;
cWC = MultiByteToWideChar(CP_ACP, 0, lpcString, -1, NULL, 0);
if (cWC <= 0)
{
return;
};
// Allocate the BSTR, including the null
m_bstr = SysAllocStringLen(NULL, cWC - 1); // SysAllocStringLen adds another 1
ASSERT(NULL != m_bstr);
if (NULL == m_bstr)
{
return;
}
// Copy the string
MultiByteToWideChar(CP_ACP, 0, lpcString, -1, (LPWSTR) m_bstr, cWC);
// Verify that the string is null terminated
ASSERT(0 == m_bstr[cWC - 1]);
}
#endif // !defined(UNICODE)