RtlUnicodeStringValidate - NtDoc

#ifndef _NTSTRSAFE_H_INCLUDED_
#ifndef NTSTRSAFE_LIB_IMPL
#ifndef NTSTRSAFE_NO_UNICODE_STRING_FUNCTIONS

/*++

  NTSTATUS
  RtlUnicodeStringValidate(
  _In_ PCUNICODE_STRING    SourceString
  );

  Routine Description:

  The RtlUnicodeStringValidate function checks the counted unicode string to make
  sure that is is valid.

  This function returns an NTSTATUS value.  It returns STATUS_SUCCESS if the
  counted unicode string is valid.

Arguments:

SourceString   - pointer to the counted unicode string to be checked

Notes:
SourceString should not be NULL. See RtlUnicodeStringValidateEx if you require
the handling of NULL values.

Return Value:

STATUS_SUCCESS -   SourceString is a valid counted unicode string

failure        -   the operation did not succeed

STATUS_INVALID_PARAMETER
-   this return value is an indication that SourceString is not a valid
counted unicode string

It is strongly recommended to use the NT_SUCCESS() macro to test the
return value of this function.

--*/

NTSTRSAFEDDI
RtlUnicodeStringValidate(
        _In_ PCUNICODE_STRING SourceString)
{
    return RtlUnicodeStringValidateWorker(SourceString, NTSTRSAFE_UNICODE_STRING_MAX_CCH, 0);
}

#endif
#endif
#endif
View code on GitHub