RtlStringExValidateDestW - NtDoc

#ifndef _NTSTRSAFE_H_INCLUDED_

NTSTRSAFEWORKERDDI
RtlStringExValidateDestW(
    _In_reads_opt_(cchDest) STRSAFE_PCNZWCH pszDest,
    _In_ size_t cchDest,
    _In_ const size_t cchMax,
    _In_ DWORD dwFlags);

#endif
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#ifndef _NTSTRSAFE_H_INCLUDED_
// Below here are the worker functions that actually do the work
#if defined(NTSTRSAFE_LIB_IMPL) || !defined(NTSTRSAFE_LIB)

NTSTRSAFEWORKERDDI
    RtlStringExValidateDestW(
            _In_reads_opt_(cchDest) STRSAFE_PCNZWCH pszDest,
            _In_ size_t cchDest,
            _In_ const size_t cchMax,
            _In_ DWORD dwFlags)
{
    NTSTATUS status = STATUS_SUCCESS;

    if (dwFlags & STRSAFE_IGNORE_NULLS)
    {
        if (((pszDest == NULL) && (cchDest != 0))   ||
                (cchDest > cchMax))
        {
            status = STATUS_INVALID_PARAMETER;
        }
    }
    else
    {
        status = RtlStringValidateDestW(pszDest, cchDest, cchMax);
    }

    return status;
}

#endif
#endif
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#ifndef _NTSTRSAFE_H_INCLUDED_
// Do not call these functions, they are worker functions for internal use within this file
#ifdef DEPRECATE_SUPPORTED
// ...
#else

#define RtlStringExValidateDestW           RtlStringExValidateDestW_do_not_call_this_function

#endif
#endif
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