>># 
>># Copyright 1990, 1991 by the Massachusetts Institute of Technology and
>># UniSoft Group Limited.
>># 
>># Permission to use, copy, modify, distribute, and sell this software and
>># its documentation for any purpose is hereby granted without fee,
>># provided that the above copyright notice appear in all copies and that
>># both that copyright notice and this permission notice appear in
>># supporting documentation, and that the names of MIT and UniSoft not be
>># used in advertising or publicity pertaining to distribution of the
>># software without specific, written prior permission.  MIT and UniSoft
>># make no representations about the suitability of this software for any
>># purpose.  It is provided "as is" without express or implied warranty.
>># 
>># $XConsortium: txtwdth16.m,v 1.5 92/06/11 17:09:52 rws Exp $
>># 
>>#
>>TITLE XTextWidth16 CH06
>>ASSERTION A XTextWidth16-1
A call to XTextWidth16 returns the sum of the
character-width metrics of all characters in the 16-bit or
2-byte character string, string, as rendered in the font
referenced by font_struct.
>>STRATEGY
For each 16-bit font
  Call XTextWidth16 with string.
  Verify returned value by direct calculation from metric info.
>>ASSERTION B XTextWidth16-2
When the font is defined with linear indexing rather than
2-byte matrix indexing, then each XChar2b structure is
interpreted as a 16-bit number with byte1 as the
most-significant byte.
>>STRATEGY
Report UNTESTED
