/*******************************************************************
DirEnsureExists
*******************************************************************/
extern "C" HRESULT DAPI DirEnsureExists(
__in LPCWSTR wzPath,
__in_opt LPSECURITY_ATTRIBUTES psa
)
{
HRESULT hr = S_OK;
UINT er;
// try to create this directory
if (!::CreateDirectoryW(wzPath, psa))
{
// if the directory already exists, bail
er = ::GetLastError();
if (ERROR_ALREADY_EXISTS == er)
ExitFunction1(hr = S_OK);
// get the parent path and try to create it
LPWSTR pwzLastSlash = NULL;
for (LPWSTR pwz = const_cast<LPWSTR>(wzPath); *pwz; pwz++)
if (*pwz == L'\\')
pwzLastSlash = pwz;
// if there is no parent directory fail
ExitOnNullDebugTrace(pwzLastSlash, hr, HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND), "cannot find parent path");
*pwzLastSlash = L'\0'; // null terminate the parent path
hr = DirEnsureExists(wzPath, psa); // recurse!
*pwzLastSlash = L'\\'; // put the slash back
ExitOnFailureDebugTrace1(hr, "failed to create path: %S", wzPath);
// try to create the directory now that all parents are created
if (!::CreateDirectoryW(wzPath, psa))
{
// if the directory already exists for some reason no error
er = ::GetLastError();
if (ERROR_ALREADY_EXISTS == er)
hr = S_FALSE;
else
hr = HRESULT_FROM_WIN32(er);
}
else
hr = S_OK;
}
LExit:
return hr;
}
/********************************************************************
ResReadStringAnsi
NOTE: ppszString should be freed with StrFree()
********************************************************************/
extern "C" HRESULT DAPI ResReadStringAnsi(
__in HINSTANCE hinst,
__in UINT uID,
__deref_out_z LPSTR* ppszString
)
{
Assert(hinst && ppszString);
HRESULT hr = S_OK;
DWORD cch = 64; // first guess
DWORD cchReturned = 0;
do
{
hr = StrAnsiAlloc(ppszString, cch);
ExitOnFailureDebugTrace1(hr, "Failed to allocate string for resource id: %d", uID);
#pragma prefast(push)
#pragma prefast(disable:25068)
cchReturned = ::LoadStringA(hinst, uID, *ppszString, cch);
#pragma prefast(pop)
if (0 == cchReturned)
{
ExitWithLastError1(hr, "Failed to load string resource id: %d", uID);
}
// if the returned string count is one character too small, it's likely we have
// more data to read
if (cchReturned + 1 == cch)
{
cch *= 2;
hr = S_FALSE;
}
} while (S_FALSE == hr);
ExitOnFailure1(hr, "failed to load string resource id: %d", uID);
LExit:
return hr;
}
