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+% This macro source file is from the four volume series
+% "TeX in Practice" by Stephan von Bechtolsheim, published
+% 1993 by Springer-Verlag, New York.
+% Copyright 1993 Stephan von Bechtolsheim.
+% No warranty or liability is assumed.
+% This macro may be copied freely if no fees other than
+% media cost or shipping charges are charged and as long
+% as this copyright and the following source code itself
+% is not changed. Please see the series for further information.
+%
+% Version: 1.0
+% Date: May 1, 1993
+%
+%
+% This source code is documented in 34.2, p. IV-58.
+% Original source in file "o1.TEX", starting line 75.
+\wlog{L: "outpsel.tip" ["o1.TEX," l. 75, p. IV-58]}%
+% This file DOES NOT belong to format "texip."
+\newcount\FirstPageNo \FirstPageNo = -100000
+\newcount\LastPageNo \LastPageNo = 100000
+\output = {%
+ \global\deadcycles = 0
+ \ifnum\pageno < \FirstPageNo
+ \setbox 255 = \box\voidbox
+ \NewLineMessage{Output routine discards page \the\pageno,
+ smaller than \string\FirstPageNo.}%
+ \else
+ \ifnum\pageno > \LastPageNo
+ \setbox 255 = \box\voidbox
+ \NewLineMessage{Output routine discards page \the\pageno,
+ larger than \string\LastPageNo.}%
+ \else
+ \shipout\box255
+ \fi
+ \fi
+ \global\advance\pageno by 1
+}