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%%% -*-TeX-*-
%%% ====================================================================
%%% @TeX-file{
%%% author = "Tom Rokicki",
%%% version = "2.7.4",
%%% date = "14 February 2011",
%%% time = "15:44:06 MST",
%%% filename = "epsf.tex",
%%% address = "Tom Rokicki
%%% Box 2081
%%% Stanford, CA 94309
%%% USA",
%%% telephone = "+1 415 855 9989",
%%% checksum = "29223 653 3100 27123",
%%% email = "rokicki@cs.stanford.edu (Internet)",
%%% codetable = "ISO/ASCII",
%%% copyright = "This file is freely redistributable and
%%% placed into the public domain by Tomas
%%% Rokicki.",
%%% keywords = "PostScript, TeX",
%%% license = "public domain",
%%% supported = "yes",
%%% abstract = "This file contains macros to support the
%%% inclusion of Encapsulated PostScript files
%%% in TeX documents.",
%%% docstring = "This file contains TeX macros to include an
%%% Encapsulated PostScript graphic. It works
%%% by finding the bounding box comment,
%%% calculating the correct scale values, and
%%% inserting a vbox of the appropriate size at
%%% the current position in the TeX document.
%%%
%%% To use, simply use
%%%
%%% \input epsf % somewhere early on in your TeX file
%%%
%%% % then where you want to insert a vbox for a figure:
%%% \epsfbox{filename.ps}
%%%
%%% Alternatively, you can supply your own
%%% bounding box by
%%%
%%% \epsfbox[0 0 30 50]{filename.ps}
%%%
%%% This will not read in the file, and will
%%% instead use the bounding box you specify.
%%%
%%% The effect will be to typeset the figure as
%%% a TeX box, at the point of your \epsfbox
%%% command. By default, the graphic will have
%%% its `natural' width (namely the width of
%%% its bounding box, as described in
%%% filename.ps). The TeX box will have depth
%%% zero.
%%%
%%% You can enlarge or reduce the figure by
%%% using
%%%
%%% \epsfxsize = <dimen> \epsfbox{filename.ps}
%%% or
%%% \epsfysize = <dimen> \epsfbox{filename.ps}
%%%
%%% instead. Then the width of the TeX box will
%%% be \epsfxsize and its height will be scaled
%%% proportionately (or the height will be
%%% \epsfysize and its width will be scaled
%%% proportionately).
%%%
%%% The width (and height) is restored to zero
%%% after each use, so \epsfxsize or \epsfysize
%%% must be specified before EACH use of
%%% \epsfbox.
%%%
%%% A more general facility for sizing is
%%% available by defining the \epsfsize macro.
%%% Normally you can redefine this macro to do
%%% almost anything. The first parameter is
%%% the natural x size of the PostScript
%%% graphic, the second parameter is the
%%% natural y size of the PostScript graphic.
%%% It must return the xsize to use, or 0 if
%%% natural scaling is to be used. Common uses
%%% include:
%%%
%%% \epsfxsize % just leave the old value alone
%%% 0pt % use the natural sizes
%%% #1 % use the natural sizes
%%% \hsize % scale to full width
%%% 0.5#1 % scale to 50% of natural size
%%% \ifnum #1 > \hsize \hsize \else #1\fi
%%% % smaller of natural, hsize
%%%
%%% If you want TeX to report the size of the
%%% figure (as a message on your terminal when
%%% it processes each figure), use
%%% `\epsfverbosetrue'.
%%%
%%% If you only want to get the bounding box
%%% extents, without producing any output boxes
%%% or \special{}, then use \epsfgetbb{filename}.
%%% The bounding box corner coordinates are saved
%%% in the macros \epsfllx, \epsflly, \epsfurx,
%%% and \epsfury in PostScript units of big
%%% points.
%%%
%%% Revision history:
%%%
%%% ---------------------------------------------
%%% epsf.tex macro file:
%%% Originally written by Tomas Rokicki of
%%% Radical Eye Software, 29 Mar 1989.
%%%
%%% ---------------------------------------------
%%% Revised by Don Knuth, 3 Jan 1990.
%%%
%%% ---------------------------------------------
%%% Revised by Tomas Rokicki, 18 Jul 1990.
%%% Accept bounding boxes with no space after
%%% the colon.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 03 Dec 1991 [2.0].
%%% Add version number and date typeout.
%%%
%%% Use \immediate\write16 instead of \message
%%% to ensure output on new line.
%%%
%%% Handle nested EPS files.
%%%
%%% Handle %%BoundingBox: (atend) lines.
%%%
%%% Do not quit when blank lines are found.
%%%
%%% Add a few percents to remove generation of
%%% spurious blank space.
%%%
%%% Move \special output to
%%% \epsfspecial{filename} so that other macro
%%% packages can input this one, then change
%%% the definition of \epsfspecial to match
%%% another DVI driver.
%%%
%%% Move size computation to \epsfsetsize which
%%% can be called by the user; the verbose
%%% output of the bounding box and scaled width
%%% and height happens here.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 05 May 1992 [2.1].
%%% Wrap \leavevmode\hbox{} around \vbox{} with
%%% the \special so that \epsffile{} can be
%%% used inside \begin{center}...\end{center}
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 09 Dec 1992 [2.2].
%%% Introduce \epsfshow{true,false} and
%%% \epsfframe{true,false} macros; the latter
%%% suppresses the insertion of the PostScript,
%%% and instead just creates an empty box,
%%% which may be handy for rapid prototyping.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 14 Dec 1992 [2.3].
%%% Add \epsfshowfilename{true,false}. When
%%% true, and \epsfshowfalse is specified, the
%%% PostScript file name will be displayed
%%% centered in the figure box.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 20 June 1993 [2.4].
%%% Remove non-zero debug setting of \epsfframemargin,
%%% and change margin handling to preserve EPS image
%%% size and aspect ratio, so that the actual
%%% box is \epsfxsize+\epsfframemargin wide by
%%% \epsfysize+\epsfframemargin high.
%%% Reduce output of \epsfshowfilenametrue to
%%% just the bare file name.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 13 July 1993 [2.5].
%%% Add \epsfframethickness for control of
%%% \epsfframe frame lines.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 02 July 1996 [2.6]
%%% Add missing initialization \epsfatendfalse;
%%% the lack of this resulted in the wrong
%%% BoundingBox being picked up, mea culpa, sigh...
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 25 October 1996 [2.7]
%%% Update to match changes in from dvips 5-600
%%% distribution: new user-accessible macros:
%%% \epsfclipon, \epsfclipoff, \epsfdrafton,
%%% \epsfdraftoff, change \empty to \epsfempty.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 18 May 2002 [2.7.1]
%%% Add write statements to echo input file
%%% names. Prior to that change, an error in
%%% such a file could be quite hard to track
%%% down: a long list of TeX page numbers could
%%% suddenly be followed by ``TeX buffer
%%% capacity'' exceeded, without any indication
%%% of the file that was responsible.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 16 May 2003 [2.7.2]
%%% Supply two critical percent characters that
%%% were mistakenly omitted in version 2.7.1,
%%% and resulted in a small amount of spurious
%%% horizontal space.
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, 14 Feb 2011 [2.7.3]
%%% Add previously-missing \space in rwi
%%% assignments (bug reported 14-Feb-2011 by
%%% Stefan Rueger <s.rueger@open.ac.uk>).
%%%
%%% ---------------------------------------------
%%% Revised by Nelson H. F. Beebe
%%% <beebe@math.utah.edu>, Karl Berry
%%% <karl@freefriends.org>, and Robin Fairbairns
%%% <Robin.Fairbairns@cl.cam.ac.uk>,
%%% 23 July 2005 [2.7.3]
%%% Add critical \hbox{} wrapper in \epsfsetgraph
%%% so that \epsfbox{} does not conflict with
%%% LaTeX center environment when \epsfbox{} is
%%% surrounded by other horizonal objects.
%%% Improve macro readability by adding legal,
%%% but invisible-in-typeset-output, spaces.
%%% Ensure that verbose status reports come
%%% inside (filename ...) list.
%%%
%%% ---------------------------------------------
%%% The checksum field above contains a CRC-16
%%% checksum as the first value, followed by
%%% the equivalent of the standard UNIX wc
%%% (word count) utility output of lines,
%%% words, and characters. This is produced by
%%% Robert Solovay's checksum utility.",
%%% }
%%% ====================================================================
%\immediate \write16 {This is `epsf.tex' v2.0 <02 Dec 1991>}%
%\immediate \write16 {This is `epsf.tex' v2.1 <05 May 1992>}%
%\immediate \write16 {This is `epsf.tex' v2.2 <09 Dec 1992>}%
%\immediate \write16 {This is `epsf.tex' v2.3 <14 Dec 1992>}%
%\immediate \write16 {This is `epsf.tex' v2.4 <20 June 1993>}%
%\immediate \write16 {This is `epsf.tex' v2.5 <13 July 1993>}%
%\immediate \write16 {This is `epsf.tex' v2.6 <02 July 1996>}%
%\immediate \write16 {This is `epsf.tex' v2.7 <25 October 1996>}%
%\immediate \write16 {This is `epsf.tex' v2.7.1 <18 May 2002>}%
%\immediate \write16 {This is `epsf.tex' v2.7.2 <16 May 2003>}%
%\immediate \write16 {This is `epsf.tex' v2.7.3 <23 July 2005>}%
\immediate \write16 {This is `epsf.tex' v2.7.4 <14 February 2011>}%
%
\newread \epsffilein % file to \read
\newif \ifepsfatend % need to scan to LAST %%BoundingBox comment?
\newif \ifepsfbbfound % success?
\newif \ifepsfdraft % use draft mode?
\newif \ifepsffileok % continue looking for the bounding box?
\newif \ifepsfframe % frame the bounding box?
\newif \ifepsfshow % show PostScript file, or just bounding box?
\epsfshowtrue % default is to display PostScript file
\newif \ifepsfshowfilename % show the file name if \epsfshowfalse specified?
\newif \ifepsfverbose % report what you're making?
\newdimen \epsfframemargin % margin between box and frame
\newdimen \epsfframethickness % thickness of frame rules
\newdimen \epsfrsize % vertical size before scaling
\newdimen \epsftmp % register for arithmetic manipulation
\newdimen \epsftsize % horizontal size before scaling
\newdimen \epsfxsize % horizontal size after scaling
\newdimen \epsfysize % vertical size after scaling
\newdimen \pspoints % conversion factor
%
\pspoints = 1bp % Adobe points are `big'
\epsfxsize = 0pt % default value, means `use natural size'
\epsfysize = 0pt % ditto
\epsfframemargin = 0pt % default value: frame box flush around picture
\epsfframethickness = 0.4pt % TeX's default rule thickness
%
\def \epsfbox #1{%
\global \def \epsfllx {72}%
\global \def \epsflly {72}%
\global \def \epsfurx {540}%
\global \def \epsfury {720}%
\def \lbracket {[}%
\def \testit {#1}%
\ifx \testit \lbracket
\let \next = \epsfgetlitbb
\else
\let \next = \epsfnormal
\fi
\next{#1}%
}%
%
% We use \epsfgetlitbb if the user specified an explicit bounding box,
% and \epsfnormal otherwise. Because \epsfgetbb can be called
% separately to retrieve the bounding box, we move the verbose
% printing the bounding box extents and size on the terminal to
% \epsfstatus. Therefore, when the user provided the bounding box,
% \epsfgetbb will not be called, so we must call \epsfsetsize and
% \epsfstatus ourselves.
%
\def \epsfgetlitbb #1#2 #3 #4 #5]#6{%
\epsfgrab #2 #3 #4 #5 .\\%
\epsfsetsize
\epsfstatus{#6}%
\epsfsetgraph{#6}%
}%
%
\def \epsfnormal #1{%
\epsfgetbb{#1}%
\epsfsetgraph{#1}%
}%
%
\def \epsfgetbb #1{%
%
% The first thing we need to do is to open the
% PostScript file, if possible.
%
\openin\epsffilein=#1
\immediate \write16 {(#1}%
\ifeof \epsffilein
\errmessage{Could not open file #1, ignoring it}%
\else %process the file
{% %start a group to contain catcode changes
% Make all special characters, except space, to be of type
% `other' so we process the file in almost verbatim mode
% (TeXbook, p. 344).
\chardef \other = 12%
\def \do ##1{\catcode`##1=\other}%
\dospecials
\catcode `\ = 10%
\epsffileoktrue %true while we are looping
\epsfatendfalse %[02-Jul-1996]: add forgotten initialization
\loop %reading lines from the EPS file
\read \epsffilein to \epsffileline
\ifeof \epsffilein %then no more input
\epsffileokfalse %so set completion flag
\else %otherwise process one line
\expandafter \epsfaux \epsffileline :. \\%
\fi
\ifepsffileok
\repeat
\ifepsfbbfound
\else
\ifepsfverbose
\immediate \write16 {No BoundingBox comment found in %
file #1; using defaults}%
\fi
\fi
}% %end catcode changes
\closein\epsffilein
\fi %end of file processing
\epsfsetsize %compute size parameters
\epsfstatus{#1}%
\immediate \write16 {)}%
}%
%
% Clipping control:
\def \epsfclipon {\def \epsfclipstring { clip}}%
\def \epsfclipoff {\def \epsfclipstring {\ifepsfdraft \space clip\fi}}%
\epsfclipoff % default for dvips is OFF
%
% The special that is emitted by \epsfsetgraph comes from this macro.
% It is defined separately to allow easy customization by other
% packages that first \input epsf.tex, then redefine \epsfspecial.
% This macro is invoked in the lower-left corner of a box of the
% width and height determined from the arguments to \epsffile, or
% from the %%BoundingBox in the EPS file itself.
%
% This version is for dvips:
\def \epsfspecial #1{%
\epsftmp=10\epsfxsize
\divide \epsftmp by \pspoints
\ifnum \epsfrsize = 0%
\relax
\special{PSfile=\ifepsfdraft psdraft.ps\else#1\fi\space
llx=\epsfllx\space
lly=\epsflly\space
urx=\epsfurx\space
ury=\epsfury\space
rwi=\number\epsftmp\space
\epsfclipstring
}%
\else
\epsfrsize=10\epsfysize
\divide \epsfrsize by \pspoints
\special{PSfile=\ifepsfdraft psdraft.ps\else#1\fi\space
llx=\epsfllx\space
lly=\epsflly\space
urx=\epsfurx\space
ury=\epsfury\space
rwi=\number\epsftmp\space
rhi=\number\epsfrsize
\epsfclipstring
}%
\fi
}%
%
% \epsfframe macro adapted from the TeXbook, exercise 21.3, p. 223, 331.
% but modified to set the box width to the natural width, rather
% than the line width, and to include space for margins and rules
\def \epsfframe #1%
{%
% method for detecting latex suggested by Robin Fairbairns, May 2005.
\ifx \documentstyle \epsfundefined
\relax
\else
% \leavevmode % so we can put this inside
% a latex centered environment
% The \leavevmode breaks under plain when this is inside a box,
% because it forces the figure to be the entire \hsize. On the
% other hand, we need the \leavevmode for it to work in LaTeX,
% because the {center} environment works by adjusting TeX's
% paragraph parameters.
%
% Compare the LaTeX sequence
% \begin{center}
% \epsfbox{tip.eps}q
% \end{center}
% (needs the \leavevmode to put the q right next to the image)
%
% with the plain TeX sequence:
% \leftline{\vbox{\epsfbox{tip.eps}}q}
% (had the q all the way over to the right, when \leavevmode was used)
\fi
%
\setbox0 = \hbox{#1}%
\dimen0 = \wd0 % natural width of argument
\advance \dimen0 by 2\epsfframemargin % plus width of 2 margins
\advance \dimen0 by 2\epsfframethickness % plus width of 2 rule lines
\relax
\hbox{%
\vbox
{%
\hrule height \epsfframethickness depth 0pt
\hbox to \dimen0
{%
\hss
\vrule width \epsfframethickness
\kern \epsfframemargin
\vbox {\kern \epsfframemargin \box0 \kern \epsfframemargin }%
\kern \epsfframemargin
\vrule width \epsfframethickness
\hss
}% end hbox
\hrule height 0pt depth \epsfframethickness
}% end vbox
}% end hbox
\relax
}%
%
\def \epsfsetgraph #1%
{%
%
% Make the vbox and stick in a \special that the DVI driver can
% parse. \vfil and \hfil are used to place the \special origin at
% the lower-left corner of the vbox. \epsfspecial can be redefined
% to produce alternate \special syntaxes.
%
\ifvmode \leavevmode \fi
\relax
\hbox{% so we can put this in \begin{center}...\end{center}
\ifepsfframe \expandafter \epsfframe \fi
{\vbox to\epsfysize
{%
\ifepsfshow
% output \special{} at lower-left corner of figure box
\vfil
\hbox to \epsfxsize{\epsfspecial{#1}\hfil}%
\else
\vfil
\hbox to\epsfxsize{%
\hss
\ifepsfshowfilename
{%
\epsfframemargin=3pt % local change of margin
\epsfframe{{\tt #1}}%
}%
\fi
\hss
}%
\vfil
\fi
}%
}}%
\relax
%
% Reset \epsfxsize and \epsfysize, as documented above.
%
\global \epsfxsize = 0pt
\global \epsfysize = 0pt
}%
%
% Now we have to calculate the scale and offset values to use.
% First we compute the natural sizes.
%
\def \epsfsetsize
{%
\epsfrsize = \epsfury \pspoints
\advance \epsfrsize by -\epsflly \pspoints
\epsftsize = \epsfurx \pspoints
\advance \epsftsize by -\epsfllx \pspoints
%
% If `epsfxsize' is 0, we default to the natural size of the picture.
% Otherwise we scale the graph to be \epsfxsize wide.
%
\epsfxsize = \epsfsize{\epsftsize}{\epsfrsize}%
\ifnum \epsfxsize = 0
\ifnum \epsfysize = 0
\epsfxsize = \epsftsize
\epsfysize = \epsfrsize
\epsfrsize = 0pt
%
% We have a sticky problem here: TeX doesn't do floating point arithmetic!
% Our goal is to compute y = rx/t. The following loop does this reasonably
% fast, with an error of at most about 16 sp (about 1/4000 pt).
%
\else
\epsftmp = \epsftsize
\divide \epsftmp by \epsfrsize
\epsfxsize = \epsfysize
\multiply \epsfxsize by \epsftmp
\multiply \epsftmp by \epsfrsize
\advance \epsftsize by -\epsftmp
\epsftmp = \epsfysize
\loop
\advance \epsftsize by \epsftsize
\divide \epsftmp by 2
\ifnum \epsftmp > 0
\ifnum \epsftsize < \epsfrsize
\else
\advance \epsftsize -\epsfrsize
\advance \epsfxsize \epsftmp
\fi
\repeat
\epsfrsize = 0pt
\fi
\else
\ifnum \epsfysize = 0
\epsftmp = \epsfrsize
\divide \epsftmp by \epsftsize
\epsfysize = \epsfxsize
\multiply \epsfysize by \epsftmp
\multiply \epsftmp by \epsftsize
\advance \epsfrsize by -\epsftmp
\epsftmp = \epsfxsize
\loop
\advance \epsfrsize by \epsfrsize
\divide \epsftmp by 2
\ifnum \epsftmp > 0
\ifnum \epsfrsize < \epsftsize
\else
\advance \epsfrsize by -\epsftsize
\advance \epsfysize by \epsftmp
\fi
\repeat
\epsfrsize = 0pt
\else
\epsfrsize = \epsfysize
\fi
\fi
}%
%
% Issue some status messages if the user requested them
%
\def \epsfstatus #1{% arg = filename
\ifepsfverbose
\immediate \write16 {#1: BoundingBox:
llx = \epsfllx \space lly = \epsflly \space
urx = \epsfurx \space ury = \epsfury \space}%
\immediate \write16 {#1: scaled width = \the\epsfxsize \space
scaled height = \the\epsfysize}%
\fi
}%
%
% We still need to define the tricky \epsfaux macro. This requires
% a couple of magic constants for comparison purposes.
%
{\catcode`\%=12 \global \let \epsfpercent=%\global \def \epsfbblit {%BoundingBox}}%
\global \def \epsfatend{(atend)}%
%
% So we're ready to check for `%BoundingBox:' and to grab the
% values if they are found.
%
% If we find a line
%
% %%BoundingBox: (atend)
%
% then we ignore it, but set a flag to force parsing all of the
% file, so the last %%BoundingBox parsed will be the one used. This
% is necessary, because EPS files can themselves contain other EPS
% files with their own %%BoundingBox comments.
%
% If we find a line
%
% %%BoundingBox: llx lly urx ury
%
% then we save the 4 values in \epsfllx, \epsflly, \epsfurx, \epsfury.
% Then, if we have not previously parsed an (atend), we flag completion
% and can stop reading the file. Otherwise, we must keep on reading
% to end of file so that we find the values on the LAST %%BoundingBox.
\long \def \epsfaux#1#2:#3\\%
{%
\def \testit {#2}% % save second character up to just before colon
\ifx#1\epsfpercent % then first char is percent (quick test)
\ifx \testit \epsfbblit % then (slow test) we have %%BoundingBox
\epsfgrab #3 . . . \\%
\ifx \epsfllx\epsfatend % then ignore %%BoundingBox: (atend)
\global \epsfatendtrue
\else % else found %%BoundingBox: llx lly urx ury
\ifepsfatend % then keep parsing ALL %%BoundingBox lines
\else % else stop after first one parsed
\epsffileokfalse
\fi
\global \epsfbbfoundtrue
\fi
\fi
\fi
}%
%
% Here we grab the values and stuff them in the appropriate definitions.
%
\def \epsfempty {}%
\def \epsfgrab #1 #2 #3 #4 #5\\{%
\global \def \epsfllx {#1}\ifx \epsfllx\epsfempty
\epsfgrab #2 #3 #4 #5 .\\\else
\global \def \epsflly {#2}%
\global \def \epsfurx {#3}\global \def \epsfury {#4}\fi
}%
%
% We default the epsfsize macro.
%
\def \epsfsize #1#2{\epsfxsize}%
%
% Finally, another definition for compatibility with older macros.
%
\let \epsffile = \epsfbox
\endinput
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