static void ThrowIfInvalidTrimmingDelimiter(HSTRING value)
{
// The delimiter must be a single code point and so cannot be more than
// 2 UTF-16 code units long
if (WindowsGetStringLen(value) > 2)
ThrowHR(E_INVALIDARG);
}
/***********************************************************************
* WindowsSubstringWithSpecifiedLength (combase.@)
*/
HRESULT WINAPI WindowsSubstringWithSpecifiedLength(HSTRING str, UINT32 start, UINT32 len, HSTRING *out)
{
struct hstring_private *priv = impl_from_HSTRING(str);
TRACE("(%p, %u, %u, %p)\n", str, start, len, out);
if (out == NULL)
return E_INVALIDARG;
if (start + len < start ||
start + len > WindowsGetStringLen(str))
return E_BOUNDS;
if (len == 0)
{
*out = NULL;
return S_OK;
}
return WindowsCreateString(&priv->buffer[start], len, out);
}
/***********************************************************************
* WindowsSubstring (combase.@)
*/
HRESULT WINAPI WindowsSubstring(HSTRING str, UINT32 start, HSTRING *out)
{
struct hstring_private *priv = impl_from_HSTRING(str);
UINT32 len = WindowsGetStringLen(str);
TRACE("(%p, %u, %p)\n", str, start, out);
if (out == NULL)
return E_INVALIDARG;
if (start > len)
return E_BOUNDS;
if (start == len)
{
*out = NULL;
return S_OK;
}
return WindowsCreateString(&priv->buffer[start], len - start, out);
}
