Source Code 1994 March/Source_Code_CD-ROM_Walnut_Creek_March_1994.iso/compsrcs/misc/volume37/lout/part08

Text File | 1993-06-19 | 82.3 KB | 2,165 lines

Newsgroups: comp.sources.misc
From: [e-mail] (Jeff Kingston)
Subject: v37i106:  lout - Lout document formatting system, v2, Part08/30
Message-ID: <[e-mail]>
X-Md4-Signature: 3fffd6449640f77c88ede06baef97105
Sender: [e-mail] (Kent Landfield)
Organization: Sterling Software
Date: Tue, 1 Jun 1993 05:18:02 GMT
Approved: [e-mail]

Submitted-by: [e-mail] (Jeff Kingston)
Posting-number: Volume 37, Issue 106
Archive-name: lout/part08
Environment: UNIX

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then feed it
# into a shell via "sh file" or similar.  To overwrite existing files,
# type "sh file -c".
# Contents:  lout/doc/tr.impl/s2.3 lout/include/eq lout/z36.c
# Wrapped by kent@sparky on Sun May 30 19:43:55 1993
PATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:/usr/lbin ; export PATH
echo If this archive is complete, you will see the following message:
echo '          "shar: End of archive 8 (of 30)."'
if test -f 'lout/doc/tr.impl/s2.3' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'lout/doc/tr.impl/s2.3'\"
else
  echo shar: Extracting \"'lout/doc/tr.impl/s2.3'\" \(12558 characters\)
  sed "s/^X//" >'lout/doc/tr.impl/s2.3' <<'END_OF_FILE'
X@SubSection
X    @Tag { objects }
X    @Title { Basic structural operators }
X@Begin
X@PP
XA programming language may be considered complete when it attains the
Xpower of a Turing machine, but no such criterion seems relevant to
Xdocument formatting.  Instead, as the language develops and new
Xapplications are attempted, deficiencies are exposed and the operator set is
Xrevised to overcome them.
X@PP
XLout has a repertoire of 23 primitive operators
X(Figure {@NumberOf primitives}),
X
X@Figure
X   @Caption { The 23 primitive operators of Lout, in order of
Xincreasing precedence. }
X   @Tag { primitives }
X@Tab
X   vmargin { 0.5vx }
X   @Fmta { @Col @I A ! @Col B }
X{
X@Rowa
X   A { object  {@Code "/"}gap  object }
X   B { Vertical concatenation with mark alignment }
X@Rowa
X   A { object  {@Code "//"}gap  object }
X   B { Vertical concatenation with left justification }
X@Rowa
X   A { object  {@Code "|"}gap  object }
X   B { Horizontal concatenation with mark alignment }
X@Rowa
X   A { object  {@Code "||"}gap  object }
X   B { Horizontal concatenation with top-justification }
X@Rowa
X   A { object  {@Code "&"}gap  object }
X   B { Horizontal concatenation within paragraphs }
X@Rowa
X   A { {@Code "@OneCol"}  object }
X   B { Hide all but one column mark of @I object }
X@Rowa
X   A { {@Code "@OneRow"}  object }
X   B { Hide all but one row mark of @I object }
X@Rowa
X   A { font  @Code "@Font"  object }
X   B { Render @I object in nominated font }
X@Rowa
X   A { breakstyle  @Code "@Break"  object}
X   B { Break paragraphs of @I object in nominated style }
X@Rowa
X   A { spacestyle  @Code "@Space"  object }
X   B { Render spaces between words in nominated style }
X@Rowa
X   A { length  {@Code "@Wide"}  object }
X   B { Render @I object to width @I length }
X@Rowa
X   A { length  {@Code "@High"}  object }
X   B { Render @I object to height @I length }
X@Rowa
X   A { {@Code "@HExpand"}  object}
X   B { Expand horizontal gaps to fill available space }
X@Rowa
X   A { {@Code "@VExpand"}  object}
X   B { Expand vertical gaps to fill available space }
X@Rowa
X   A { {@Code "@HScale"}  object }
X   B { Horizontal geometrical scaling to fill available space }
X@Rowa
X   A { {@Code "@VScale"}  object }
X   B { Vertical geometrical scaling to fill available space }
X@Rowa
X   A { angle  {@Code "@Rotate"}  object }
X   B { Rotate @I object by @I angle }
X@Rowa
X   A { PostScript  {@Code "@Graphic"}  object }
X   B { Escape to graphics language }
X@Rowa
X   A { @Code "@Next"  object }
X   B { Add 1 to an object denoting a number }
X@Rowa
X   A { object  @Code "@Case"  alternatives }
X   B { Select from a set of alternative objects }
X@Rowa
X   A { identifier  @Code "&&"  object }
X   B { Cross reference }
X@Rowa
X   A { cross-reference  @Code "@Open"  object }
X   B { Retrieve value from cross reference }
X@Rowa
X   A { cross-reference  @Code "@Tagged"  object}
X   B { Attach cross referencing tag to object }
X}
X
Xwhich has proven adequate for a wide variety of features, including equations,
Xtables, and page layout, and so seems to be reasonably complete in this
Xpragmatic sense.  In this section we introduce the eight concatenation and
Xmark-hiding operators.  To them falls the basic task of assembling complex
Xobjects from simple ones, and they were the first
Xto be designed and implemented.
X@PP
XMany of the operators of Eqn can be viewed as building small tables.  A
Xbuilt-up fraction, for example, has one column and three rows
X(numerator, line, and denominator).  Numerous investigations of this
Xkind convinced the author that operators capable of assembling the rows
Xand columns of tables would suffice for building all kinds of objects.
X@PP
XThe simplest objects are empty objects and literal words like
X{@Code metempsychosis}, which have one column mark and one row mark:
X@ID {
X@ShowMarks metempsychosis
X}
XTo place two arbitrary objects side by side, we use the infix
Xoperator {@Code "|"}, denoting horizontal concatenation.  For
Xexample,
X@ID {
X@Code "USA  |0.2i  Australia"
X}
Xproduces the object
X@ID {
X@ShowMarks USA |0.2i @ShowMarks Australia
X}
XThe row marks are merged into one, fixing the vertical position of
Xthe objects relative to each other; their horizontal separation is
Xdetermined by the @I gap attached to the operator, in this case 0.2
Xinches.  We think of the gap as part of the operator, although
Xstrictly it is a third parameter.  It may be omitted, defaulting to
X{@Code "0i"}.
X@PP
X@I {Vertical concatenation} & , denoted by the infix operator {@Code "/"},
Xis the same apart from the change of direction:
X@ID {
X@Code "Australia  /0.1i  USA"
X}
Xproduces the object
X@ID {
X@ShowMarks Australia /0.1i
X@ShowMarks USA
X}
Xwith column marks merged and a 0.1 inch gap.
X@PP
XConsider now what happens when horizontal and vertical are combined:
X@ID  @Code {
X             |1m  "{"  USA         |1m  "|0.2i" |1m   Australia  "}"
X/1vx "/0.1i" |    "{"  Washington  |    "|"     |     Canberra  "}"
X}
XThe two parameters of @Code "/" now have two column marks each, and
Xthey will be merged with the corresponding marks in the other
Xparameter, yielding the object
X@ID {
X      @ShowMarks USA &
X      { 0 ymark moveto xsize 10 pt add ymark lineto [ 3 pt ] 0 setdash stroke }
X      @Graphic {1c @Wide }
X      |0.2i @ShowMarks Australia
X/0.1i @ShowMarks Washington  |     @ShowMarks Canberra
X}
XThe @Code "0.2i" gap separates columns, not individual items in
Xcolumns, so a gap attached to the second @Code "|" would serve no
Xpurpose; any such gap is ignored.  If the number of marks to be merged
Xdiffers, empty columns are added at the right to equalize the number.  The
Xfour marks protruding from the result are all available for merging
Xwith neighbouring marks by other concatenation operators.  The precedence
Xof @Code "|" is higher than the precedence of {@Code "/"}, so the braces
Xcould be omitted.
X@PP
XWhen lines of text are concatenated, it is conventional to measure
Xtheir separation from baseline to baseline (mark to mark in Lout),
Xrather than from edge to edge as above.  This idea of different
Xreference points for measurement evolved over the years into a
Xsystem of six @I {gap modes} (Figure {@NumberOf gapmodes}), expressed
Xby appending a letter to the length.  For example, @Code "|0.2i" is
Xan abbreviation for {@Code "|0.2ie"}, meaning 0.2 inches measured
Xfrom edge to edge; @Code "|0.3ix"
Xproduces a 0.3 inch gap measured from mark to mark and widened if
Xnecessary to prevent overstriking; and @Code "|2.5it" places its right
Xparameter 2.5 inches from the current left margin, irrespective of
Xthe position of the left parameter.  There is also a choice of
Xeleven units of measurement (inches, centimetres, multiples of the
Xcurrent font size, etc.), the most interesting being
Xthe @Code r unit:  one @Code r is the column width minus the width of
Xthe following object, so that @Code "|1rt" produces sufficient space
Xto right justify the following object, and @Code "|0.5rt" to center
Xit.  These features implement spacings needed in practice rather
Xthan suggested by theory.  They work with all five concatenation
Xoperators, horizontal and vertical.
X
X@Figure
X   @Tag { gapmodes }
X   @Caption { The six gap modes (@I length is any length).  Hyphenation
Xmode has an extra property not shown here. }
X@Fig {
X{ /2.5vx Edge-to-edge |0.3i   {@Code "|"} &1p {@I length} &1p {@Code e}
X  /4.2vx Hyphenation    |0.3i   {@Code "|"} &1p {@I length} &1p {@Code h}
X  /4.2vx Overstrike     |0.3i   {@Code "|"} &1p {@I length} &1p {@Code o}
X  /4.2vx Mark-to-mark   |0.3i   {@Code "|"} &1p {@I length} &1p {@Code x}
X  /4.2vx Kerning        |0.3i   {@Code "|"} &1p {@I length} &1p {@Code k}
X  /4.2vx Tabulation     |0.3i   {@Code "|"} &1p {@I length} &1p {@Code t}
X}
X||0.5i
X@Box margin { 0c } 6c @Wide 13.5c @High 9p @Font
X{
X  @OneRow {
X     @At { 1c   @Wide 0.5c @High } @Put { @LBox 0.2co }
X     @At { 4c   @Wide 0.5c @High } @Put { @LBox 0.5co }
X     @At { 2.2c @Wide 1.4c @High } @Put { @DoubleArrow 1.8c }
X     @At { 2.2c @Wide 1.6c @High } @Put { 1.8c @Wide { &0.5rt @I length } }
X  }
X  //4vx
X  @OneRow {
X     @At { 1c   @Wide 0.5c @High } @Put { @LBox 0.2co }
X     @At { 4c   @Wide 0.5c @High } @Put { @LBox 0.5co }
X     @At { 2.2c @Wide 1.4c @High } @Put { @DoubleArrow 1.8c }
X     @At { 2.2c @Wide 1.6c @High } @Put { 1.8c @Wide { &0.5rt @I length } }
X  }
X  //4vx
X  @OneRow {
X     @At { 1c   @Wide 0.5c @High } @Put { @LBox 0.2co }
X     @At { 4c   @Wide 0.5c @High } @Put { @LBox 0.5co }
X     @At { 1.2c @Wide 1.5c @High } @Put { @DoubleArrow 3.3c }
X     @At { 1.2c @Wide 1.7c @High } @Put { 3.3c @Wide { &0.5rt @I length } }
X  }
X  //4vx
X  @OneRow {
X     @At { 1c   @Wide 0.5c @High } @Put { @LBox 0.2co }
X     @At { 4c   @Wide 0.5c @High } @Put { @LBox 0.5co }
X     @At { 1.2c @Wide 1.5c @High } @Put { @DoubleArrow 3.3c }
X     @At { 1.2c @Wide 1.7c @High }
X    @Put 3.3c @Wide { |0.5rt @Eq { max(length, a+b) } }
X     @At { 1.2c @Wide 0.4c @High } @Put { @DoubleArrow 1.0c }
X     @At { 1.2c @Wide 0.2c @High } @Put { 1.0c @Wide { &0.5rt @I a } }
X     @At { 4c   @Wide 0.4c @High } @Put { @DoubleArrow 0.5c }
X     @At { 4c   @Wide 0.2c @High } @Put { 0.5c @Wide { &0.5rt @I b } }
X  }
X  //4.5vx
X  @OneRow {
X     @At { 1c   @Wide 0.5c @High } @Put { @LBox 0.2co }
X     @At { 4c   @Wide 0.5c @High } @Put { @LBox 0.5co }
X     @At { 1.2c @Wide 1.5c @High } @Put { @DoubleArrow 3.3c }
X     @At { 1.2c @Wide 1.7c @High }
X    @Put { 3.3c @Wide { |0.5rt @Eq { max(length, a, b) } } }
X     @At { 1.2c @Wide 0.4c @High } @Put { @DoubleArrow 1.0c }
X     @At { 1.2c @Wide 0.2c @High } @Put { 1.0c @Wide { &0.5rt @I a } }
X     @At { 4c   @Wide 0.4c @High } @Put { @DoubleArrow 0.5c }
X     @At { 4c   @Wide 0.2c @High } @Put { 0.5c @Wide { &0.5rt @I b } }
X  }
X  //4vx
X  @OneRow {
X     @At { 1c   @Wide 0.5c @High } @Put { @LBox 0.2co }
X     @At { 4c   @Wide 0.5c @High } @Put { @LBox 0.5co }
X     @At { 0.0c @Wide 1.6c @High } @Put { @DoubleArrow 4.0c }
X     @At { 2.8c @Wide 1.8c @High } @Put { @I length }
X  }
X  //5vx
X  @DoubleArrow 6c
X  //0.1c |0.5rt @I { current bound }
X}
X}
X
X@PP
XWhen we construct a built-up fraction, the result has three row marks, but
Xonly the second should be visible outside the object:
X@ID @Eq { @ShowMarks { X over Y } }
XThis is a common problem, and accordingly a @Code "@OneRow" operator was
Xintroduced for hiding all but one of the row marks of its
Xparameter.  Normally, the first mark is the survivor, but a later mark can
Xbe chosen by prefixing @Code "^" to the preceding concatenation operator:
X@ID @Code "@OneRow { X  ^/2p  @HLine  /2p  Y }"
Xhas the desired result, where {@Code "2p"} is two points and @Code "@HLine"
Xis an easy combination of Lout's graphics operators.  A similar operator,
X{@Code "@OneCol"}, hides column marks.
X@PP
XA variant of @Code "/" called @Code "//" is provided which performs
Xvertical concatenation but ignores all column marks and simply
Xleft-justifies its two parameters:
X@ID @Code {
X"Heading  //0.1i"
X"A  |0.2i  B  /0.1i"
X"C  |  D"
X}
Xhas result
X@ID { Heading //0.1i  A  |0.2i  B  /0.1i  C  |  D }
Xshowing that spanning columns in tables motivate the inclusion of this
Xoperator.  There is an analogous @Code "||" operator.  The author
Xwould have preferred to leave out these operators, since they
Xcomplicate the implementation, and it is interesting to examine the
Xprospects of doing so.
X@PP
XThe @Code "//" operator is formally redundant, because in general
Xthe expression @Code "x // y" can be replaced by
X@ID @Code {
X"@OneCol {  |  x  }   /"
X"@OneCol {  |  y  }"
X}
Xfor any objects {@Code x} and {@Code y}.  By concatenating an empty
Xobject at the left of @Code x and hiding all but that empty object's
Xcolumn mark, we effectively shift {@Code x}'s column mark to its left
Xedge.  The same goes for {@Code y}, so the @Code "/" operator has just
Xone column mark to merge, at the extreme left, and its effect is
Xindistinguishable from {@Code "//"}.
X@PP
XUnfortunately, if @Code y consists of two rows separated by {@Code "/"},
Xas in the example above, both rows must be placed inside the
X{@Code "@OneCol"}, and the table cannot be entered in the simple
Xrow-by-row manner that non-expert users naturally expect.  Another
Xadvantage of @Code "//" is that its left parameter can be printed
Xbefore its right parameter is known; this is important when the left
Xparameter is an entire page.
X@PP
XThe fifth and final concatenation operator, {@Code "&"}, is an explicit
Xversion of the horizontal concatenation operator interpolated when
Xobjects are separated by white space.  It is formally identical to
X@Code "|" except for taking higher precedence and being subject to
Xreplacement by @Code "//1vx" during paragraph breaking
X(Section {@NumberOf style}).
X@End @SubSection
END_OF_FILE
  if test 12558 -ne `wc -c <'lout/doc/tr.impl/s2.3'`; then
    echo shar: \"'lout/doc/tr.impl/s2.3'\" unpacked with wrong size!
  fi
  # end of 'lout/doc/tr.impl/s2.3'
fi
if test -f 'lout/include/eq' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'lout/include/eq'\"
else
  echo shar: Extracting \"'lout/include/eq'\" \(35135 characters\)
  sed "s/^X//" >'lout/include/eq' <<'END_OF_FILE'
X
X###############################################################################
X#                                                                             #
X#  Lout @Eq package for equation formatting (Version 2.0)                     #
X#                                                                             #
X#  Version 1.0 by Jeffrey H. Kingston, December 1990.                         #
X#  Version 2.0 by Jeffrey H. Kingston, 22 December 1992.                      #
X#                                                                             #
X#  See "Eq - a Lout package for typesetting mathematics" for user             #
X#  information.  Acknowledgement:  the @Eq language is based closely on       #
X#  the Eqn language of B. W. Kernighan and L. L. Cherry; the spacing rules    #
X#  are similar to those of the TeX system by D. E. Knuth.                     #
X#                                                                             #
X###############################################################################
X
Xexport    "`" "``" "```" bin rel punct non vctr big
X
X    space exclam universal numbersign existential percent
X    ampersand suchthat parenleft parenright asteriskmath
X    plus comma minus period slash zero one two three four
X    five six seven eight nine colon semicolon less equal
X    greater question congruent Alpha Beta Chi Delta Epsilon
X    Phi Gamma Eta Iota thetaone Kappa Lambda Mu Nu Omicron
X    Pi Theta Rho Sigma Tau Upsilon sigmaone Omega Xi Psi Zeta
X    bracketleft therefore bracketright perpendicular underscore
X    radicalex alpha beta chi delta epsilon phi gamma eta iota
X    phione kappa lambda mu nu omicron pi theta rho sigma tau
X    upsilon omegaone omega xi psi zeta braceleft bar braceright
X    similar Upsilonone minute lessequal fraction infinity florin
X    club diamond heart spade arrowboth arrowleft arrowup
X    arrowright arrowdown degree plusminus second greaterequal
X    multiply proportional partialdiff bullet divide notequal
X    equivalence approxequal ellipsis arrowvertex arrowhorizex
X    carriagereturn aleph Ifraktur Rfraktur weierstrass
X    circlemultiply circleplus emptyset intersection union
X    propersuperset reflexsuperset notsubset propersubset
X    reflexsubset element notelement angle gradient registerserif
X    copyrightserif trademarkserif product radical dotmath
X    logicalnot logicaland logicalor arrowdblboth arrowdblleft
X    arrowdblup arrowdblright arrowdbldown lozenge angleleft
X    registersans copyrightsans trademarksans summation parenlefttp
X    parenleftex parenleftbt bracketlefttp bracketleftex
X    bracketleftbt bracelefttp braceleftmid braceleftbt braceex
X    angleright integral integraltp integralex integralbt
X    parenrighttp parenrightex parenrightbt bracketrighttp
X    bracketrightex bracketrightbt bracerighttp bracerightmid
X    bracerightbt
X
X    hbar Re Im partial infty prime nabla surd top bot dbar
X    triangle backslash forall exists neg circle square
X
X    "0" "1" "2" "3" "4" "5" "6" "7" "8" "9"
X
X    sum prod coprod int oint bcap bcup bvee bwedge bodot botimes
X    boplus buplus
X
X    "+" "-" "+-" "-+" setminus cdot times "*" circ div cap cup uplus
X    sqcap sqcup triangleleft triangleright wr bigcirc bigtriangleup
X    bigtriangledown vee wedge oplus ominus otimes oslash odot dagger
X    daggerdbl amalg
X
X    "<" ">" "=" "<=" prec preceq "<<" subset subseteq sqsubseteq
X    in vdash smile frown ">=" succ succeq ">>" supset supseteq
X    sqsupseteq ni dashv mid parallel "==" "~" "-~" asymp "~~"
X    "=~" bowtie propto models doteq perp notsub notin "!=" not
X    "<->" "<--" "-->" up down "<=>" "<==" "==>" dblup dbldown
X    ":" "::" ":="
X
X    lpar blpar rpar brpar lbrack blbrack rbrack brbrack lbrace blbrace
X    rbrace brbrace lfloor blfloor rfloor brfloor lceil blceil
X    rceil brceil langle blangle rangle brangle
X
X    ";" "," col
X
X    "!" "?" "%" "(" ")" "[" "]"
X
X    arccos arcsin arctan arg cos cosh cot coth csc deg det dim exp
X    gcd hom inf ker lg lim liminf limsup ln log max min Pr sec sin
X    sinh supr tan tanh mod ldots cdots vdots ddots del grad
X    "..." "'" empty
X
X    sup sub supp on frac half third over from to widefrom wideto
X    dot dotdot hat tilde vec dyad overbar underbar sqrt root above
X    labove cabove rabove mabove nextcol matrix
X
Xdef @Eq
X   body @Body
X@Begin
X
X   def @SkewGap  { 0.05f  }
X   def @SupGap   { 0.40fk }
X   def @ThinGap  { 0.15v  }
X   def @MedGap   { 0.20v  }
X   def @ThickGap { 0.25v  }
X   def @ColGap   { 0.8f   }
X   def @RowGap   { 0.5f   }
X   def @FontRed  { 0.7f   }
X   def @FontInc  { 1.3f   }
X
X   def "`"       { &@ThinGap  }
X   def "``"      { &@MedGap   }
X   def "```"     { &@ThickGap }
X
X   def bin    right x { ``  x ``  }
X   def rel    right x { ``` x ``` }
X   def punct    right x {     x `   }
X   def non    right x { 0c @Break x }
X   def big    right x { @FontInc @Font 0c @Space @FontInc @Break x }
X
X   def @Base    right x { Base @Font x }
X   def @Smaller right x { @FontRed @Font 0c @Space     0.2f @Break x }
X   def @Sym     right x { {Symbol Base} @Font x }
X
X   def @HLine
X      named line { "0.05 ft setlinewidth" }
X   {
X      { "0 0 moveto xsize 0 lineto" line "stroke" } @Graphic {}
X   }
X
X   def @VLine
X   {
X      "0 0 moveto 0 ysize lineto 0.05 ft setlinewidth stroke" @Graphic {}
X   }
X
X   def vctr
X      right x
X   { @OneRow {   -180d @Rotate { /0.5wo 180d @Rotate { / @OneRow @OneCol x  } }
X           ^/      @OneRow { /0.5wo      @OneRow { @OneRow @OneCol x ^/ } }
X         }
X   }
X
X   ###################################################################
X   #                                                                 #
X   #   Full names                                                    #
X   #                                                                 #
X   #   These symbols and their names are taken directly from the     #
X   #   Adobe Systems Inc. Symbol font (see PostScript Language       #
X   #   Reference Manual, pp. 256-257).  The only differences are:    #
X   #                                                                 #
X   #      Adobe:  theta1        Eq:  thetaone                        #
X   #              sigma1             sigmaone                        #
X   #              phi1               phione                          #
X   #              omega1             omegaone                        #
X   #                                                                 #
X   #   These were needed since Lout identifiers do not have digits.  #
X   #                                                                 #
X   ###################################################################
X
X   def space           { @Sym "\040"  }
X   def exclam          { @Sym "\041"  }
X   def universal       { @Sym "\042"  }
X   def numbersign      { @Sym "\043"  }
X   def existential     { @Sym "\044"  }
X   def percent         { @Sym "\045"  }
X   def ampersand       { @Sym "\046"  }
X   def suchthat        { @Sym "\047"  }
X   def parenleft       { @Sym "\050"  }
X   def parenright      { @Sym "\051"  }
X   def asteriskmath    { @Sym "\052"  }
X   def plus            { @Sym "+"     }
X   def comma           { @Sym "\054"  }
X   def minus           { @Sym "-"     }
X   def period          { @Sym "\056"  }
X   def slash           { @Sym "\057"  }
X   def zero            { @Sym "\060"  }
X   def one             { @Sym "\061"  }
X   def two             { @Sym "\062"  }
X   def three           { @Sym "\063"  }
X   def four            { @Sym "\064"  }
X   def five            { @Sym "\065"  }
X   def six             { @Sym "\066"  }
X   def seven           { @Sym "\067"  }
X   def eight           { @Sym "\070"  }
X   def nine            { @Sym "\071"  }
X   def colon           { @Sym "\072"  }
X   def semicolon       { @Sym "\073"  }
X   def less            { @Sym "\074"  }
X   def equal           { @Sym "\075"  }
X   def greater         { @Sym "\076"  }
X   def question        { @Sym "\077"  }
X   def congruent       { @Sym "\100"  }
X   def Alpha           { @Sym "\101"  }
X   def Beta            { @Sym "\102"  }
X   def Chi             { @Sym "\103"  }
X   def Delta           { @Sym "\104"  }
X   def Epsilon         { @Sym "\105"  }
X   def Phi             { @Sym "\106"  }
X   def Gamma           { @Sym "\107"  }
X   def Eta             { @Sym "\110"  }
X   def Iota            { @Sym "\111"  }
X   def thetaone        { @Sym "\112"  }
X   def Kappa           { @Sym "\113"  }
X
X   def Lambda          { @Sym "\114"  }
X   def Mu              { @Sym "\115"  }
X   def Nu              { @Sym "\116"  }
X   def Omicron         { @Sym "\117"  }
X   def Pi              { @Sym "\120"  }
X   def Theta           { @Sym "\121"  }
X   def Rho             { @Sym "\122"  }
X   def Sigma           { @Sym "\123"  }
X   def Tau             { @Sym "\124"  }
X   def Upsilon         { @Sym "\125"  }
X   def sigmaone        { @Sym "\126"  }
X   def Omega           { @Sym "\127"  }
X   def Xi              { @Sym "\130"  }
X   def Psi             { @Sym "\131"  }
X   def Zeta            { @Sym "\132"  }
X   def bracketleft     { @Sym "\133"  }
X   def therefore       { @Sym "\134"  }
X   def bracketright    { @Sym "\135"  }
X   def perpendicular   { @Sym "\136"  }
X   def underscore      { @Sym "\137"  }
X   def radicalex       { @Sym "\140"  }
X   def alpha           { @Sym "\141"  }
X   def beta            { @Sym "\142"  }
X   def chi             { @Sym "\143"  }
X   def delta           { @Sym "\144"  }
X   def epsilon         { @Sym "\145"  }
X   def phi             { @Sym "\146"  }
X   def gamma           { @Sym "\147"  }
X   def eta             { @Sym "\150"  }
X   def iota            { @Sym "\151"  }
X   def phione          { @Sym "\152"  }
X   def kappa           { @Sym "\153"  }
X   def lambda          { @Sym "\154"  }
X   def mu              { @Sym "\155"  }
X   def nu              { @Sym "\156"  }
X
X   def omicron         { @Sym "\157"  }
X   def pi              { @Sym "\160"  }
X   def theta           { @Sym "\161"  }
X   def rho             { @Sym "\162"  }
X   def sigma           { @Sym "\163"  }
X   def tau             { @Sym "\164"  }
X   def upsilon         { @Sym "\165"  }
X   def omegaone        { @Sym "\166"  }
X   def omega           { @Sym "\167"  }
X   def xi              { @Sym "\170"  }
X   def psi             { @Sym "\171"  }
X   def zeta            { @Sym "\172"  }
X   def braceleft       { @Sym "\173"  }
X   def bar             { @Sym "\174"  }
X   def braceright      { @Sym "\175"  }
X   def similar         { @Sym "\176"  }
X   def Upsilonone      { @Sym "\241"  }
X   def minute          { @Sym "\242"  }
X   def lessequal       { @Sym "\243"  }
X   def fraction        { @Sym "\244"  }
X   def infinity        { @Sym "\245"  }
X   def florin          { @Sym "\246"  }
X   def club            { @Sym "\247"  }
X   def diamond         { @Sym "\250"  }
X   def heart           { @Sym "\251"  }
X   def spade           { @Sym "\252"  }
X   def arrowboth       { @Sym "\253"  }
X   def arrowleft       { @Sym "\254"  }
X   def arrowup         { @Sym "\255"  }
X   def arrowright      { @Sym "\256"  }
X   def arrowdown       { @Sym "\257"  }
X   def degree          { @Sym "\260"  }
X   def plusminus       { @Sym "\261"  }
X   def second          { @Sym "\262"  }
X   def greaterequal    { @Sym "\263"  }
X
X   def multiply        { @Sym "\264"  }
X   def proportional    { @Sym "\265"  }
X   def partialdiff     { @Sym "\266"  }
X   def bullet          { @Sym "\267"  }
X   def divide          { @Sym "\270"  }
X   def notequal        { @Sym "\271"  }
X   def equivalence     { @Sym "\272"  }
X   def approxequal     { @Sym "\273"  }
X   def ellipsis        { @Sym "\274"  }
X   def arrowvertex     { @Sym "\275"  }
X   def arrowhorizex    { @Sym "\276"  }
X   def carriagereturn  { @Sym "\277"  }
X   def aleph           { @Sym "\300"  }
X   def Ifraktur        { @Sym "\301"  }
X   def Rfraktur        { @Sym "\302"  }
X   def weierstrass     { @Sym "\303"  }
X   def circlemultiply  { @Sym "\304"  }
X   def circleplus      { @Sym "\305"  }
X   def emptyset        { @Sym "\306"  }
X   def intersection    { @Sym "\307"  }
X   def union           { @Sym "\310"  }
X   def propersuperset  { @Sym "\311"  }
X   def reflexsuperset  { @Sym "\312"  }
X   def notsubset       { @Sym "\313"  }
X   def propersubset    { @Sym "\314"  }
X   def reflexsubset    { @Sym "\315"  }
X   def element         { @Sym "\316"  }
X   def notelement      { @Sym "\317"  }
X   def angle           { @Sym "\320"  }
X   def gradient        { @Sym "\321"  }
X   def registerserif   { @Sym "\322"  }
X   def copyrightserif  { @Sym "\323"  }
X   def trademarkserif  { @Sym "\324"  }
X   def product         { @Sym "\325"  }
X   def radical         { @Sym "\326"  }
X   def dotmath         { @Sym "\327"  }
X
X   def logicalnot      { @Sym "\330"  }
X   def logicaland      { @Sym "\331"  }
X   def logicalor       { @Sym "\332"  }
X   def arrowdblboth    { @Sym "\333"  }
X   def arrowdblleft    { @Sym "\334"  }
X   def arrowdblup      { @Sym "\335"  }
X   def arrowdblright   { @Sym "\336"  }
X   def arrowdbldown    { @Sym "\337"  }
X   def lozenge         { @Sym "\340"  }
X   def angleleft       { @Sym "\341"  }
X   def registersans    { @Sym "\342"  }
X   def copyrightsans   { @Sym "\343"  }
X   def trademarksans   { @Sym "\344"  }
X   def summation       { @Sym "\345"  }
X   def parenlefttp     { @Sym "\346"  }
X   def parenleftex     { @Sym "\347"  }
X   def parenleftbt     { @Sym "\350"  }
X   def bracketlefttp   { @Sym "\351"  }
X   def bracketleftex   { @Sym "\352"  }
X   def bracketleftbt   { @Sym "\353"  }
X   def bracelefttp     { @Sym "\354"  }
X   def braceleftmid    { @Sym "\355"  }
X   def braceleftbt     { @Sym "\356"  }
X   def braceex         { @Sym "\357"  }
X   def angleright      { @Sym "\361"  }
X   def integral        { @Sym "\362"  }
X   def integraltp      { @Sym "\363"  }
X   def integralex      { @Sym "\364"  }
X   def integralbt      { @Sym "\365"  }
X   def parenrighttp    { @Sym "\366"  }
X   def parenrightex    { @Sym "\367"  }
X   def parenrightbt    { @Sym "\370"  }
X   def bracketrighttp  { @Sym "\371"  }
X   def bracketrightex  { @Sym "\372"  }
X   def bracketrightbt  { @Sym "\373"  }
X   def bracerighttp    { @Sym "\374"  }
X   def bracerightmid   { @Sym "\375"  }
X   def bracerightbt    { @Sym "\376"  }
X
X
X   ###################################################################
X   #                                                                 #
X   #   Short names                                                   #
X   #                                                                 #
X   #   These symbols, their names, and their spacing, are based on   #
X   #   the list in Appendix F of Donald E. Knuth's The TeXBook.      #
X   #                                                                 #
X   #   Group 1 (lowercase Greek letters):  see full names above      #
X   #   Group 2 (uppercase Greek letters):  see full names above      #
X   #   Group 3 (calligraphic capitals):    not provided by Eq        #
X   #                                                                 #
X   ###################################################################
X
X   ###################################################################
X   #                                                                 #
X   #   Group 4 (miscellaneous Ord symbols)                           #
X   #                                                                 #
X   #   Not all of Knuth's symbols are available.  The four suits     #
X   #   (heartsuit, etc.), have definitions above.                    #
X   #                                                                 #
X   ###################################################################
X
X   def hbar         { @OneCol { &0.1f @Base "-" ^/0.25fo h }    }
X   def Re           { Rfraktur                    }
X   def Im           { Ifraktur                    }
X   def partial      { partialdiff                }
X   def infty        { infinity                    }
X   def prime        {  minute                        }
X  #def emptyset     { defined above                }
X   def nabla        { gradient                    }
X   def surd         { radical                    }
X   def top          { 180d @Rotate perpendicular        }
X   def bot          { perpendicular                }
X   def dbar         { @Base "||"                             }
X  #def angle        { defined above                }
X   def backslash    { "\\"                    }
X   def forall       { universal                    }
X   def exists       { existential                }
X   def neg          { logicalnot                }
X
X   def circle       { @HContract @VContract
X              { "xsize ysize 2 div moveto"
X            "xsize 2 div ysize 2 div xsize 2 div 0 360 arc"
X            "0.04 ft setlinewidth stroke"
X              }
X              @Graphic { 0.7f @Wide 0.3f @High ^/ 0.3f @High }
X            }
X
X   def square       { @HContract @VContract
X              { "0 0 moveto xsize 0 lineto xsize ysize lineto"
X            "0 ysize lineto closepath"
X            "0.04 ft setlinewidth stroke"
X              }
X              @Graphic { 0.6f @Wide 0.3f @High ^/ 0.3f @High }
X            }
X
X   def triangle     { @HContract @VContract
X              { "0 0 moveto xsize 0 lineto"
X                "xsize 2 div ysize lineto closepath"
X            "0.04 ft setlinewidth stroke"
X              }
X              @Graphic
X              { 0.3f @Wide 0.3f @High ^| ^/
X                0.3f @Wide 0.3f @High
X              }
X            }
X
X   ###################################################################
X   #                                                                 #
X   #   Group 5 (digits)                                              #
X   #                                                                 #
X   ###################################################################
X
X   def "0" { zero            }
X   def "1" { one             }
X   def "2" { two             }
X   def "3" { three           }
X   def "4" { four            }
X   def "5" { five            }
X   def "6" { six             }
X   def "7" { seven           }
X   def "8" { eight           }
X   def "9" { nine            }
X
X
X   ###################################################################
X   #                                                                 #
X   #   Group 6 ("Large" operators)                                   #
X   #                                                                 #
X   #   Knuth's large operators automatically change size depending   #
X   #   on whether the equation is display or inline.  Eq does not    #
X   #   do this; instead, the `big' operator must be used.            #
X   #                                                                 #
X   ###################################################################
X
X   def sum    { summation                    }
X   def prod    { product                    }
X   def coprod    { 180d @Rotate vctr product            }
X   def int    { 1.3f @Font vctr integral            }
X   def oint    { @OneCol { vctr degree |0.015fo int }        }
X   def bcap    { 1.3f @Font intersection            }
X   def bcup    { 1.3f @Font union                }
X   def bvee    { 1.3f @Font logicalor                }
X   def bwedge    { 1.3f @Font logicaland                }
X   def bodot    { & 1.3f @Font @HContract { circle /0io &0.5rt dotmath } }
X   def botimes    { 1.3f @Font circlemultiply            }
X   def boplus    { 1.3f @Font circleplus                }
X   def buplus    { & 1.3f @Font @HContract { &0.5rt 0.7f @Font plus ^/0.2fo union } }
X
X   ###################################################################
X   #                                                                 #
X   #   Group 7 (binary operations)                                   #
X   #                                                                 #
X   #   All of Knuth's symbols are available except \star, \diamond   #
X   #   and \bullet; a few have been given more mnemonic names.       #
X   #                                                                 #
X   ###################################################################
X
X   def "+"        { bin plus                }
X   def "-"        { bin minus                }
X   def "+-"        { bin plusminus                }
X   def "-+"        { bin 180d @Rotate plusminus        }
X   def setminus        { bin backslash                }
X   def cdot        { bin dotmath                }
X   def times        { bin multiply                }
X   def "*"        { bin asteriskmath            }
X  #def diamond        { name used above            }
X   def circ        { bin circle                }
X  #def bullet        { name used above            }
X   def div        { bin divide                }
X   def cap        { bin intersection            }
X   def cup        { bin union                }
X   def uplus        { bin @OneRow @HContract { &0.5rt 0.7f @Font plus ^/0.2fo union}}
X   def sqcap        { bin
X              { @HContract @VContract
X                {    "0 0 moveto 0 ysize lineto xsize ysize lineto"
X                "xsize 0 lineto"
X                "0.04 ft setlinewidth stroke"
X                }
X                @Graphic
X                {    0.3f @Wide 0.3f @High ^| ^/
X                0.3f @Wide 0.3f @High
X                }
X              }
X            }
X   def sqcup        { 180d @Rotate sqcap            }
X   def triangleleft    { bin 90d @Rotate 0.8f @Font triangle    }
X   def triangleright    { bin "-90d" @Rotate 0.8f @Font triangle}
X   def wr        { bin vctr {90d @Rotate similar}    }
X   def bigcirc        { bin 1.2f @Font circle            }
X   def bigtriangleup    { bin 1.2f @Font triangle        }
X   def bigtriangledown    { bin 180d @Rotate 1.2f @Font triangle    }
X   def vee        { bin logicalor                }
X   def wedge        { bin logicaland            }
X   def oplus        { bin circleplus            }
X   def ominus        { bin @OneRow @HContract { circle /0io &0.5rt minus}}
X   def otimes        { bin circlemultiply            }
X   def oslash        {`vctr 60d @Rotate @HContract {circle/0io &0.5rt minus`}}
X   def odot        { bin @OneRow @HContract {circle/0io &0.5rt dotmath}}
X   def dagger        { bin @Base "\262"            }
X   def daggerdbl    { bin @Base "\263"            }
X   def amalg        { bin 180d @Rotate vctr product        }
X
X   ###################################################################
X   #                                                                 #
X   #   Group 8 (relations)                                           #
X   #                                                                 #
X   #   All Knuth's operators are available, but many have been       #
X   #   given different, more mnemonic names.  Also included is       #
X   #   a not operator for negating the relations.                    #
X   #                                                                 #
X   ###################################################################
X
X   def "<"        { rel less                }
X   def ">"        { rel greater                }
X   def "="        { rel equal                }
X   def "<="        { rel lessequal                }
X   def prec        { rel { 0.45f @Font "-90d" @Rotate
X                { parenrighttp ^| parenlefttp }
X                  }
X            }
X   def preceq        { rel { @OneRow non prec /0.1f minus }    }
X   def "<<"        { rel {less less}            }
X   def subset        { rel propersubset            }
X   def subseteq        { rel reflexsubset            }
X   def sqsubseteq    { rel @HContract @VContract
X              {    { "xsize 0 moveto"
X                  "0 0 lineto"
X                  "0 ysize lineto"
X                  "xsize ysize lineto"
X                  "0.04 ft setlinewidth stroke"
X                }
X                @Graphic
X                { 0.5f @Wide 0.25f @High ^/
X                  0.25f @High
X                }
X                /0.1f minus
X              }
X            }
X
X   def in        { rel element                }
X   def vdash        { rel vctr{"-90d" @Rotate perpendicular}}
X   def smile        { rel vctr 90d @Rotate parenleft    }
X   def frown        { rel vctr 90d @Rotate parenright    }
X
X   def ">="        { rel greaterequal            }
X   def succ        { rel { 0.45f @Font 90d @Rotate
X                    { parenrighttp ^| parenlefttp }
X                  }
X            }
X   def succeq        { rel { @OneRow non succ /0.1f minus }    }
X   def ">>"        { rel {greater greater}            }
X   def supset        { rel propersuperset            }
X   def supseteq        { rel reflexsuperset            }
X   def sqsupseteq    { rel @HContract @VContract
X              {    { "0 0 moveto xsize 0 lineto"
X                  "xsize ysize lineto"
X                  "0 ysize lineto"
X                  "0.04 ft setlinewidth stroke"
X                }
X                @Graphic
X                { 0.5f @Wide 0.25f @High ^/
X                  0.25f @High
X                }
X                /0.1f minus
X              }
X            }
X   def ni        { rel 180d @Rotate element        }
X   def dashv        { rel vctr {90d @Rotate perpendicular}    }
X   def mid        { rel @Base "|"                }
X   def parallel        { rel @Base "||"            }
X
X   def "=="        { rel equivalence            }
X   def "~"        { rel similar                }
X   def "-~"        { rel @OneRow{similar^/0.07f/0.07f minus}}
X   def asymp        { rel 0.7f @Font @OneRow
X                  { 90d @Rotate parenleft ^/0.008f
X                  /0.008f 90d @Rotate parenright }
X            }
X   def "~~"        { rel approxequal            }
X   def "=~"        { rel congruent                }
X   def bowtie        { rel{non triangleright non triangleleft}}
X   def propto        { rel proportional            }
X   def models        { rel{@Base vctr "|" &0.05fo vctr equal}}
X   def doteq        { rel @OneRow @HContract {&0.5rt dotmath^/0.15f equal}}
X   def perp        { rel perpendicular            }
X
X   def notsub        { rel notsubset                }
X   def notin        { rel notelement            }
X   def "!="        { rel notequal                }
X
X   def "<->"        { rel arrowboth                }
X   def "<--"        { rel arrowleft                }
X   def "-->"        { rel arrowright            }
X   def up        { rel arrowup                }
X   def down        { rel arrowdown                }
X   def "<=>"        { rel arrowdblboth            }
X   def "<=="        { rel arrowdblleft            }
X   def "==>"        { rel arrowdblright            }
X   def dblup        { rel arrowdblup            }
X   def dbldown        { rel arrowdbldown            }
X
X   def ":"        { rel colon                }
X   def "::"        { rel @OneCol {colon ` colon}        }
X   def ":="        { rel { colon{ //0.05fo equal} }    }
X
X   def not right x    { @HContract {@OneCol x /0co &0.5rt slash}}
X
X
X   ###################################################################
X   #                                                                 #
X   #   Groups 11 and 12 - openings and closings.                     #
X   #                                                                 #
X   ###################################################################
X
X   def lpar    { parenleft        }
X   def rpar    { parenright        }
X   def lbrack    { bracketleft        }
X   def rbrack    { bracketright        }
X   def lbrace    { braceleft        }
X   def rbrace    { braceright        }
X   def lfloor    { bracketleftbt        }
X   def rfloor    { bracketrightbt    }
X   def lceil    { bracketlefttp        }
X   def rceil    { bracketrighttp    }
X   def langle    { angleleft        }
X   def rangle    { angleright        }
X
X   def blpar    { @OneRow {parenlefttp    ^/ parenleftex    / parenleftbt   } }
X   def brpar    { @OneRow {parenrighttp   ^/ parenrightex   / parenrightbt  } }
X   def blbrack    { @OneRow {bracketlefttp  ^/ bracketleftex  / bracketleftbt } }
X   def brbrack    { @OneRow {bracketrighttp ^/ bracketrightex / bracketrightbt} }
X   def blbrace    { @OneRow {bracelefttp    ^/ braceleftmid   / braceleftbt   } }
X   def brbrace    { @OneRow {bracerighttp   ^/ bracerightmid  / bracerightbt  } }
X   def blfloor    { @OneRow {bracketleftex  ^/ bracketleftex  / bracketleftbt } }
X   def brfloor    { @OneRow {bracketrightex ^/ bracketrightex / bracketrightbt} }
X   def blceil    { @OneRow {bracketlefttp  ^/ bracketleftex  / bracketleftex } }
X   def brceil    { @OneRow {bracketrighttp ^/ bracketrightex / bracketrightex} }
X   def blangle    { @HContract @VContract
X          { "xsize 0 moveto"
X            "0 ysize 2 div lineto"
X            "xsize ysize lineto"
X            "0.04 ft setlinewidth stroke"
X              }
X              @Graphic { 0.5f @Wide 2f @High ^/ 2f @High }
X        }
X   def brangle    { @HContract @VContract
X          { "0 0 moveto"
X            "xsize ysize 2 div lineto"
X            "0 ysize lineto"
X            "0.04 ft setlinewidth stroke"
X              }
X              @Graphic { 0.5f @Wide 2f @High ^/ 2f @High }
X        }
X
X
X   ###################################################################
X   #                                                                 #
X   #   Group 13 - punctuation.                                       #
X   #                                                                 #
X   ###################################################################
X
X   def ";"     { punct semicolon     }
X   def ","     { punct comma         }
X   def col     { punct colon         }
X
X
X   ###################################################################
X   #                                                                 #
X   #   Additional short symbols (Knuth p. 132)                       #
X   #                                                                 #
X   ###################################################################
X
X   def "!" { exclam          }
X   def "?" { question        }
X   def "%" { percent         }
X   def "(" { parenleft       }
X   def ")" { parenright      }
X   def "[" { bracketleft     }
X   def "]" { bracketright    }
X
X
X   ###################################################################
X   #                                                                 #
X   #   Common mathematical functions (from Knuth p. 162).            #
X   #   mod is included, since @Rel mod is easily typed if needed.    #
X   #                                                                 #
X   ###################################################################
X
X   def arccos    { @Base "arccos"    }
X   def arcsin    { @Base "arcsin"    }
X   def arctan    { @Base "arctan"    }
X   def arg    { @Base "arg"        }
X   def cos    { @Base "cos"        }
X   def cosh    { @Base "cosh"        }
X   def cot    { @Base "cot"        }
X   def coth    { @Base "coth"        }
X   def csc    { @Base "csc"        }
X   def deg    { @Base "deg"        }
X   def det    { @Base "det"        }
X   def dim    { @Base "dim"        }
X   def exp    { @Base "exp"        }
X   def gcd    { @Base "gcd"        }
X   def hom    { @Base "hom"        }
X   def inf    { @Base "inf"        }
X   def ker    { @Base "ker"        }
X   def lg    { @Base "lg"        }
X   def lim    { @Base "lim"        }
X   def liminf    { @OneCol { @Base "lim" ` @Base "inf" }    }
X   def limsup    { @OneCol { @Base "lim" ` @Base "sup" }    }
X   def ln    { @Base "ln"        }
X   def log    { @Base "log"        }
X   def max    { @Base "max"        }
X   def min    { @Base "min"        }
X   def Pr    { @Base "Pr"        }
X   def sec    { @Base "sec"        }
X   def sin    { @Base "sin"        }
X   def sinh    { @Base "sinh"        }
X   def supr    { @Base "sup"        }
X   def tan    { @Base "tan"        }
X   def tanh    { @Base "tanh"        }
X   def mod    { @Base "mod"        }
X
X
X   ###################################################################
X   #                                                                 #
X   #   Other symbols taken from TeX.                                 #
X   #                                                                 #
X   ###################################################################
X
X   def ldots { .       &0.3f .       &0.3f .            }
X   def cdots { dotmath &0.3f dotmath &0.3f dotmath        }
X   def vdots { @OneRow { dotmath ^/0.3f dotmath /0.3f dotmath } }
X   def ddots { @OneCol @OneRow
X           {        dotmath
X             ^/0.3f |0.3f dotmath
X                  /0.3f |     |0.3f dotmath
X           }
X         }
X
X
X   ###################################################################
X   #                                                                 #
X   #   Symbols taken from eqn (Kernighan and Cherry 1975).           #
X   #                                                                 #
X   ###################################################################
X
X   def del    { gradient        }
X   def grad    { gradient        }
X   def "..."    { ellipsis        }
X   def ",...,"    { , ellipsis ``` ,    }
X   def "'"    { minute        }
X   def empty    { emptyset        }
X
X
X
X   ###################################################################
X   #                                                                 #
X   #   Symbols with parameters.                                      #
X   #                                                                 #
X   #   These symbols are essentially those of eqn, with some         #
X   #   changes and additions.                                        #
X   #                                                                 #
X   ###################################################################
X
X   def sup
X      precedence 60
X      associativity left
X      left x
X      named gap { @SupGap }
X      right y
X   {  @HContract @VContract
X      {          | @Smaller y
X    ^/gap  x
X      }
X   }
X
X   def sub
X      precedence 60
X      associativity left
X      left x
X      named gap { @SupGap }
X      right y
X   {  @HContract @VContract
X      {
X          x
X     /gap    |  @Smaller y
X      }
X   }
X
X   def supp
X      precedence 60
X      associativity left
X      left x
X      named gap { @SupGap }
X      right y
X   {  @HContract @VContract
X      { { ^/gap x /gap } |  @Smaller y
X      }
X   }
X
X   def on
X      precedence 61
X      associativity left
X      left x
X      named gap { @SupGap }
X      right y
X   {  x ^/  / y
X   }
X
X   def frac
X      precedence 54
X      associativity left
X      left x
X      named gap { 0ik }
X      right y
X   {  @HContract @VContract @Smaller
X      { x ^/gap | fraction /gap | | y }
X   }
X
X   def half { 1 frac 2 }
X   def third { 1 frac 3 }
X
X   def over
X      precedence 54
X      associativity left
X      left x
X      named gap { 0.2f }
X      right y
X   {
X      @HContract @VContract
X      {          |0.5rt @OneCol x
X    ^//gap   @HLine
X     //gap   |0.5rt @OneCol y
X      }
X   }
X
X   def from
X      precedence 58
X      associativity left
X      left x
X      named gap { @ThinGap  }
X      named skew { 0c }
X      right y
X   {
X      @HContract @VContract
X      {          |0.5rt x
X     //gap   |0.5rt &skew @Smaller y
X      }
X   }
X
X   def to
X      precedence 58
X      associativity left
X      left x
X      named gap { @ThinGap  }
X      named skew { 0c }
X      right y
X   {
X      @HContract @VContract
X      {          |0.5rt &skew @Smaller y
X    ^//gap   |0.5rt x
X      }
X   }
X
X   def widefrom
X      precedence 58
X      associativity left
X      left x
X      named gap { @ThinGap  }
X      right y
X   {
X      @HContract @VContract
X      {  x //gap @HScale y
X      }
X   }
X
X   def wideto
X      precedence 58
X      associativity left
X      left x
X      named gap { @ThinGap  }
X      right y
X   {
X      @HContract @VContract
X      { @HScale y ^//gap x
X      }
X   }
X
X   def dot
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x to gap { gap } skew { @SkewGap } .
X   }
X
X   def dotdot
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x to gap { gap } skew { @SkewGap } ..
X   }
X
X   def hat
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x to gap { gap } skew { @SkewGap } @Base "^"
X   }
X
X   def tilde
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x to gap { gap } skew { @SkewGap } @Base "~"
X   }
X
X   def vec
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x to gap { gap } skew { @SkewGap } arrowright
X   }
X
X   def dyad
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x to gap { gap } skew { @SkewGap } arrowboth
X   }
X
X   def overbar
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x wideto gap { gap } minus
X   }
X
X   def underbar
X      precedence 62
X      left x
X      named gap { @ThinGap }
X   {  x widefrom gap { gap } minus
X   }
X
X   def sqrt
X      precedence 56
X      named gap { @ThinGap }
X      right x
X   {
X      @HContract @VContract
X      { @VScale surd | @OneRow
X    { @HLine line { "0.03 ft setlinewidth 2 setlinecap" }
X      ^//gap  |gap  x //gap
X    }
X      }
X   }
X
X   def root
X      precedence 56
X      left x
X      right y
X   { "" sup x &0io sqrt y
X   }
X
X   def above
X      precedence 52
X      left x
X      named gap { @RowGap }
X      right y
X   {  |0.5rt x //gap |0.5rt y
X   }
X
X   def labove
X      precedence 52
X      left x
X      named gap { @RowGap }
X      right y
X   {  x //gap y
X   }
X
X   def cabove
X      precedence 52
X      left x
X      named gap { @RowGap }
X      right y
X   {  |0.5rt x //gap |0.5rt y
X   }
X
X   def rabove
X      precedence 52
X      left x
X      named gap { @RowGap }
X      right y
X   {  |1rt x //gap |1rt y
X   }
X
X   def mabove
X      precedence 52
X      left x
X      named gap { @RowGap }
X      right y
X   {  x /gap y
X   }
X
X   def nextcol
X      precedence 50
X      left x
X      named gap { @ColGap }
X      right y
X   { x |gap y
X   }
X
X   def matrix
X      precedence 100
X      named gap { @MedGap }
X      named atleft {}
X      named atright {}
X      right x
X   { vctr @HContract @VContract
X     {  @VScale atleft
X    ||@ThinGap  { //gap x //gap } ||@ThinGap
X    @VScale atright
X     }
X   }
X
X   Slope @Font 1.2f @Break 0c @Space @Body
X
X@End @Eq
END_OF_FILE
  if test 35135 -ne `wc -c <'lout/include/eq'`; then
    echo shar: \"'lout/include/eq'\" unpacked with wrong size!
  fi
  # end of 'lout/include/eq'
fi
if test -f 'lout/z36.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'lout/z36.c'\"
else
  echo shar: Extracting \"'lout/z36.c'\" \(31731 characters\)
  sed "s/^X//" >'lout/z36.c' <<'END_OF_FILE'
X/*@z36.c:Hyphenation: Hyphenate()@********************************************/
X/*                                                                           */
X/*  LOUT: A HIGH-LEVEL LANGUAGE FOR DOCUMENT FORMATTING (VERSION 2.03)       */
X/*  COPYRIGHT (C) 1993 Jeffrey H. Kingston                                   */
X/*                                                                           */
X/*  Jeffrey H. Kingston ([e-mail])                                   */
X/*  Basser Department of Computer Science                                    */
X/*  The University of Sydney 2006                                            */
X/*  AUSTRALIA                                                                */
X/*                                                                           */
X/*  This program is free software; you can redistribute it and/or modify     */
X/*  it under the terms of the GNU General Public License as published by     */
X/*  the Free Software Foundation; either version 1, or (at your option)      */
X/*  any later version.                                                       */
X/*                                                                           */
X/*  This program is distributed in the hope that it will be useful,          */
X/*  but WITHOUT ANY WARRANTY; without even the implied warranty of           */
X/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            */
X/*  GNU General Public License for more details.                             */
X/*                                                                           */
X/*  You should have received a copy of the GNU General Public License        */
X/*  along with this program; if not, write to the Free Software              */
X/*  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
X/*                                                                           */
X/*  FILE:         z36.c                                                      */
X/*  MODULE:       Hyphenation                                                */
X/*  EXTERNS:      Hyphenate()                                                */
X/*                                                                           */
X/*****************************************************************************/
X#include "externs"
X#define MAX_CHAR    256        /* max chars represented in one char */
X#define TRIE_MAGIC    5361534
X#define KILL_CLASS    0        /* characters which prevent hyphen'n */
X#define PUNCT_CLASS    1        /* characters which delimit hyphen'n */
X
Xtypedef struct trie_rec
X{ int    magic;                /* a magic number to make sure ok    */
X  int    class_count;            /* the number of character classes   */
X  unsigned char    class[MAX_CHAR];    /* the character classes             */
X  short    *node_mem;            /* the node memory                   */
X  int    node_lim;            /* top of node memory                */
X  int    node_free;            /* first free space in node memory   */
X  unsigned char    *string_mem;        /* the string memory                 */
X  int    string_lim;            /* top of string memory              */
X  int    string_first;            /* the first (last inserted) string  */
X} *TRIE;
X
X
X#ifdef DEBUG_ON
X/*****************************************************************************/
X/*                                                                           */
X/*  findrep(i, T)     Returns one character whose class in T is i.           */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic unsigned char findrep(i, T)
Xint i;  TRIE T;
X{ int ch;
X  for( ch = 0;  ch < MAX_CHAR;  ch++ )  if( T->class[ch] == i )  return ch;
X  Error(INTERN, no_fpos, "hyph DoTriePrint: findrep failed");
X} /* end findrep */
X#endif
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  TRIE T                                                                   */
X/*                                                                           */
X/*  The packed hyphenation table, or NULL if not yet read in.                */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic TRIE    T = (TRIE) NULL;    /* the compressed hyphenation table  */
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  TRIE NewTrie(node_lim, string_lim)                                       */
X/*                                                                           */
X/*  Initialize a new trie with the given amount of space for nodes and       */
X/*  strings.                                                                 */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic TRIE NewTrie(node_lim, string_lim)
Xint node_lim, string_lim;
X{ TRIE T;  int i;  char *malloc();
X  debug2(DHY, D, "NewTrie(%d, %d)", node_lim, string_lim);
X  T = (TRIE) malloc( sizeof(struct trie_rec)
X             + node_lim*sizeof(short) + string_lim*sizeof(char));
X  T->magic = TRIE_MAGIC;  T->class_count = 1;
X  for( i = 0;  i < MAX_CHAR;  i++ )  T->class[i] = 0;
X  T->node_mem = (short *) ( (char *) T + sizeof(struct trie_rec));
X  T->node_lim = node_lim;  T->node_free = 0;
X  T->string_mem = (unsigned char *) &(T->node_mem[node_lim]);
X  T->string_lim = T->string_first = string_lim;
X  debug0(DHY, D, "NewTrie returning.");
X  return T;
X} /* end NewTrie */
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  ClassConvert(in, out, T)                                                 */
X/*                                                                           */
X/*  Set out[i] to the character class of in[i] in T, for all i.              */
X/*                                                                           */
X/*****************************************************************************/
X
X#define ClassConvert(in, out, T)                    \
X{ int i;                                \
X  for( i = 0;  in[i] != '\0';  i++ )                    \
X    if( T->class[in[i]] != 0 )  out[i] = T->class[in[i]];        \
X    else Error(INTERN, no_fpos, "hyph: \"%s\" has illegal class", in);    \
X  out[i] = '\0';                            \
X} /* end ClassConvert */
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  short NewTrieString(str, T)                                              */
X/*                                                                           */
X/*  Copy a new string into T, and return its offset in string_mem;           */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic short NewTrieString(str, T)
Xunsigned char *str;  TRIE T;
X{ int i;  short res = T->string_first - strlen(str) - 1;
X  if( res < 0 )  Error(INTERN, no_fpos, "hyph: trie string limit exceeded");
X  T->string_first = res;  strcpy(&(T->string_mem[res]), str);
X  return res;
X} /* end NewTrieString */
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  int NewTrieNode(T)                                                       */
X/*                                                                           */
X/*  Allocate a new empty trie node in T, and return its offset in node_mem.  */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic int NewTrieNode(T)
XTRIE T;
X{ int i;  int res;
X  if( T->node_free + T->class_count > T->node_lim )
X    Error(INTERN, no_fpos, "hyph: trie node limit exceeded");
X  res = T->node_free;  T->node_free += T->class_count;
X  for( i = res;  i < T->node_free;  i++ )  T->node_mem[i] = 0;
X  return res;
X} /* end NewTrieNode */
X
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  AddClassToTrie(str, T)                                                   */
X/*                                                                           */
X/*  Add a new character class, whose members are the characters of str, to   */
X/*  trie T.  This cannot occur after the first insertion.                    */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic AddClassToTrie(str, T)
Xunsigned char *str; TRIE T;
X{ int i;
X  if( T->string_first != T-> string_lim )
X    Error(INTERN, no_fpos, "hyph AddClassToTrie after first insertion!");
X  for( i = 0;  str[i] != '\0';  i++ )
X    if( T->class[str[i]] == 0 ) T->class[str[i]] = T->class_count;
X    else Error(INTERN,no_fpos, "hyph: class of %c may not be changed!", str[i]);
X  T->class_count++;
X} /* end AddClassToTrie */
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  TrieInsert(key, value, T)                                                */
X/*                                                                           */
X/*  Insert a new key and value into trie T.                                  */
X/*                                                                           */
X/*****************************************************************************/
X
XTrieInsert(key, value, T)
Xunsigned char *key, *value;  TRIE T;
X{ unsigned char str[MAX_LINE];  int i, curr_node, next_node, pos, ch;
X  debug2(DHY, D, "TrieInsert(%s, %s, T)", key, value);
X
X  /* if first insertion, add one node after making sure class_count is even */
X  if( T->node_free == 0 )
X  { T->class_count = 2 * ceiling(T->class_count, 2);
X    ch = NewTrieNode(T);
X  }
X
X  /* invariant: curr_node is an existing node of T with prefix str[0..i-1] */
X  ClassConvert(key, str, T);
X  curr_node = i = 0;
X  for(;;)
X  {
X    /* if str is ended, add value only to string memory */
X    if( str[i] == '\0' )
X    { if( T->node_mem[curr_node] != 0 )
X    Error(INTERN, no_fpos, "hyph string %s already inserted", key);
X      else T->node_mem[curr_node] = - NewTrieString(value, T);
X      debug0(DHY, D, "TrieInsert returning (empty suffix).");
X      return;
X    }
X
X    /* if next position is unoccupied, store remainder of str and value */
X    next_node = T->node_mem[curr_node + str[i]];
X    if( next_node == 0 )
X    { ch = NewTrieString(value, T);
X      T->node_mem[curr_node + str[i]] = - NewTrieString(&str[i+1], T);
X      debug0(DHY, D, "TrieInsert returning (non-empty suffix).");
X      return;
X    }
X
X    /* if next position is occupied by a non-empty string, move that */
X    /* string down one level and replace it by a trie node           */
X    if( next_node < 0 )
X    { pos = - next_node;
X      ch = T->string_mem[pos];
X      if( T->string_first == pos )  T->string_first++;
X      T->node_mem[curr_node + str[i]] = next_node = NewTrieNode(T)/2;
X      T->node_mem[2*next_node + ch] = -(pos+1);
X    }
X
X    /* now next is the offset of the next node to be searched */
X    curr_node = 2*next_node;  i++;
X  }
X} /* end TrieInsert */
X
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  BeGetChar(fp, pv)                                                        */
X/*  BePutChar(fp, v)                                                         */
X/*  BeGetShort(fp, pv)                                                       */
X/*  BePutShort(fp, v)                                                        */
X/*  BeGetInt(fp, pv)                                                         */
X/*  BePutInt(fp, v)                                                          */
X/*                                                                           */
X/*  Get char, short, or int pv from file fp, and put char, short, or int     */
X/*  onto file fp.  These routines are designed so that the file can be       */
X/*  written or read safely by big-endian and little-endian architectures;    */
X/*  this is accomplished by reading and writing one byte at a time to and    */
X/*  from a big-endian format file.  All return 0 on success, -1 on failure.  */
X/*  Thanks to David W. Sanderson for this code.                              */
X/*                                                                           */
X/*****************************************************************************/
X
X#define BeGetChar(fp, pv)  ( (c = getc(fp)) == EOF ? -1 : (*pv = c & 0xFF, 0) )
X#define BePutChar(fp, v)   ( putc(v & 0xFF, fp), 0 )
X
X#define BeGetShort(fp, pv)                        \
X(  (c = getc(fp)) == EOF ? -1 :                        \
X   (  *pv = (c & 0xFF) << 8,                        \
X      (c = getc(fp)) == EOF ? -1 : (*pv |= c & 0xFF, 0)            \
X   )                                    \
X)
X
X#define BePutShort(fp, v)                        \
X( putc((v >> 8) & 0xFF, fp), putc(v & 0xFF, fp), 0 )
X
Xint BeGetInt(fp, pv)
XFILE *fp; int *pv;
X{ int c;
X  if ((c = getc(fp)) == EOF) return -1;
X  *pv = (c & 0xFF) << 24;
X  if ((c = getc(fp)) == EOF) return -1;
X  *pv |= (c & 0xFF) << 16;
X  if ((c = getc(fp)) == EOF) return -1;
X  *pv |= (c & 0xFF) << 8;
X  if ((c = getc(fp)) == EOF) return -1;
X  *pv |= c & 0xFF;
X  return 0;
X}
X
Xint BePutInt(fp, v)
XFILE *fp; int v;
X{
X  putc((v >> 24) & 0xFF, fp);
X  putc((v >> 16) & 0xFF, fp);
X  putc((v >> 8) & 0xFF, fp);
X  putc(v & 0xFF, fp);
X  return 0;
X}
X
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  TRIE TrieRead()                                                          */
X/*                                                                           */
X/*  Read in a packed trie if possible, otherwise pack an unpacked one.       */
X/*                                                                           */
X/*****************************************************************************/
X
XTRIE TrieRead()
X{ TRIE T;  FILE_NUM unpacked_fnum, packed_fnum;
X  FILE *unpacked_fp, *packed_fp;  int len, prev, i, j, c;
X  char *malloc();
X  debug0(DHY, D, "TrieRead()");
X
X  /* open file, using name stored in file handler */
X  packed_fnum = FirstFile(HYPH_PACKED_FILE);
X  assert( packed_fnum != NO_FILE, "TrieRead: packed_fnum!" );
X  packed_fp = OpenFile(packed_fnum, FALSE);
X  if( packed_fp == NULL )
X  {
X    /* no packed file, so open unpacked one instead */
X    unsigned char str[MAX_LINE], key[MAX_LINE], value[MAX_LINE],
X          buff[MAX_LINE+10];
X    unpacked_fnum = FirstFile(HYPH_FILE);
X    assert( unpacked_fnum != NO_FILE, "TrieRead: unpacked unpacked_fnum!" );
X    unpacked_fp = OpenFile(unpacked_fnum, FALSE);
X    if( unpacked_fp == NULL )
X    { Error(WARN, no_fpos, "cannot open hyphenation file %s",
X    FileName(unpacked_fnum));
X      return (TRIE) NULL;
X    }
X
X    /* read in unpacked hyphenation trie from unpacked_fp and compress it */
X    T = NewTrie(60000, 32767);
X    while( fgets(str, MAX_LINE, unpacked_fp) != NULL && str[0] != '\n' )
X    { str[strlen(str)-1] = '\0';
X      debug1(DHY, D, "adding class %s", str);
X      AddClassToTrie(str, T);
X    }
X    while( fgets(str, MAX_LINE, unpacked_fp) != NULL && str[0] != '\n' )
X    { prev = '0'; j = 0;
X      for( i = 0;  str[i] != '\n' && str[i] != '\0';  i++ )
X      { if( str[i] >= '0' && str[i] <= '9' )  prev = str[i];
X        else key[j] = str[i], value[j++] = prev, prev = '0';
X      }
X      key[j] = '\0';  value[j] = prev;  value[j+1] = '\0';
X      TrieInsert(key, value, T);
X    }
X    fclose(unpacked_fp);
X    len = CompressTrie(T);
X
X    /* write the compressed trie out to the packed file */
X    strcpy(buff, FileName(unpacked_fnum));
X    strcat(buff, HYPH_SUFFIX);
X    packed_fp = fopen(buff, "w");
X    if( packed_fp == NULL )  Error(FATAL, no_fpos,
X      "cannot write to hyphenation file %s", buff);
X    BePutInt(packed_fp, T->magic);
X    BePutInt(packed_fp, T->class_count);
X    for( i = 0; i < MAX_CHAR; i++ )  BePutChar(packed_fp, T->class[i]);
X    BePutInt(packed_fp, 0);  /* placeholder for node_mem */
X    BePutInt(packed_fp, T->node_lim);
X    BePutInt(packed_fp, T->node_free);
X    BePutInt(packed_fp, 0);  /* placeholder for string_mem */
X    BePutInt(packed_fp, T->string_lim);
X    BePutInt(packed_fp, T->string_first);
X    for( i = 0; i < T->node_free; i++ )  BePutShort(packed_fp, T->node_mem[i]);
X    for( i = 0; i < T->string_lim; i++)  BePutChar(packed_fp, T->string_mem[i]);
X    fclose(packed_fp);
X    /***OLD*VERSION*********************************************************
X    if( fwrite( (char *) T, len, 1, packed_fp) != 1 )  Error(FATAL, no_fpos,
X      "error on write to hyphenation file %s", buff);
X    ***********************************************************************/
X
X    /* now try again to open packed_fnum, the file just written */
X    packed_fp = OpenFile(packed_fnum, FALSE);
X    if( packed_fp == NULL )  Error(FATAL, no_fpos,
X      "cannot open hyphenation file %s", FileName(packed_fnum));
X  }
X
X  /* now packed hyphenation file is open, read it in */
X  fseek(packed_fp, 0L, 2);  len = (int) ftell(packed_fp);  rewind(packed_fp);
X  T = (TRIE) malloc(len);
X  /***OLD*VERSION**********************************************************
X  if( fread( (char *) T, len, 1, packed_fp) != 1 )  Error(FATAL, no_fpos,
X      "error on read of hyphenation file %s", FileName(packed_fnum));
X  ************************************************************************/
X  if( BeGetInt(packed_fp, &T->magic) != 0 )  Error(FATAL, no_fpos,
X      "error on read from packed hyphenation file %s", FileName(packed_fnum));
X  if( T->magic != TRIE_MAGIC )  Error(FATAL, no_fpos,
X      "bad magic number in hyphenation file %s", FileName(packed_fnum));
X  BeGetInt(packed_fp, &T->class_count);
X  for( i = 0; i < MAX_CHAR; i++ )  BeGetChar(packed_fp, &T->class[i]);
X  BeGetInt(packed_fp, &i);  /* placeholder for node_mem */
X  BeGetInt(packed_fp, &T->node_lim);
X  BeGetInt(packed_fp, &T->node_free);
X  BeGetInt(packed_fp, &i);  /* placeholder for string_mem */
X  BeGetInt(packed_fp, &T->string_lim);
X  BeGetInt(packed_fp, &T->string_first);
X  T->node_mem = (short *) ( (char *) T + sizeof(struct trie_rec) );
X  T->string_mem = (unsigned char *) &(T->node_mem[T->node_lim]);
X  for( i = 0; i < T->node_free; i++ )  BeGetShort(packed_fp, &T->node_mem[i]);
X  for( i = 0; i < T->string_lim; i++ ) BeGetChar(packed_fp, &T->string_mem[i]);
X
X  /* debug and exit */
X  debug0(DHY, D, "TrieRead returning, T =");
X  ifdebug(DHY, DD, TriePrint(T, stderr));
X  return T;
X} /* end TrieRead */
X
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  int CompressTrie(T)                                                      */
X/*                                                                           */
X/*  Compress trie T and return its length in characters.                     */
X/*                                                                           */
X/*****************************************************************************/
X
Xint CompressTrie(T)
XTRIE T;
X{ unsigned char *p, *q;  int len, i;
X  debug0(DHY, D, "CompressTrie(T), T =");
X  ifdebug(DHY, DD, TriePrint(T, stderr));
X  T->node_lim = T->node_free;
X  for( i = 0;  i < T->node_lim;  i++ )
X    if( T->node_mem[i] < 0 )
X      T->node_mem[i] = - ( -T->node_mem[i] - T->string_first);
X  p = (unsigned char *) &(T->node_mem[T->node_free]);
X  q = &(T->string_mem[T->string_first]);
X  len = T->string_lim - T->string_first;
X  for( i = 0;  i < len;  i++ )  *p++ = *q++;
X  T->string_mem = (unsigned char *) &(T->node_mem[T->node_lim]);
X  T->string_first = 0;
X  T->string_lim = len;
X  len = sizeof(struct trie_rec) + T->node_lim * sizeof(short)
X                + T->string_lim * sizeof(unsigned char);
X  debug1(DHY, D, "CompressTrie returning %d, T =", len);
X  ifdebug(DHY, DD, TriePrint(T, stderr));
X  return len;
X} /* end CompressTrie */
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  AccumulateRating(x, y)                                                   */
X/*                                                                           */
X/*  Accumulate the hyphenation rating string x into y.                       */
X/*                                                                           */
X/*****************************************************************************/
X
X#define AccumulateRating(x, y)                        \
X{ unsigned char *p = x, *q = y;                            \
X  while( *p )                                \
X  { if( *p > *q )  *q = *p;                        \
X    p++, q++;                                \
X  }                                    \
X} /* end AccumulateRating */
X
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  OBJECT Hyphenate(x)                                                      */
X/*                                                                           */
X/*  Hyphenate ACAT object x, returning the hyphenated result.                */
X/*                                                                           */
X/*****************************************************************************/
X
XOBJECT Hyphenate(x)
XOBJECT x;
X{ OBJECT link, y, z, next_link;
X  unsigned char str[MAX_LINE+2], rate[MAX_LINE+3],
X        *class, *key, *ss, *s, *rem, *p, *q;
X  int start, stop, i, j, curr_node, next_node, pos;
X  BOOLEAN hyphenated;  static ShowRate();
X  static BOOLEAN tried_file = FALSE;
X  assert( type(x) == ACAT, "Hyphenate: type(x) != ACAT!" );
X  debug1(DHY, DD, "Hyphenate(%s)", EchoObject(null, x));
X
X  /* if no trie is present, try to get it from a file */
X  if( T == (TRIE) NULL )
X  { if( !tried_file )  T = TrieRead();
X    tried_file = TRUE;
X    if( T == (TRIE) NULL )
X    { debug0(DHY, DD, "Hyphenate returning (no trie).");
X      return x;
X    }
X  }
X
X  /* for each word y of x, try to hyphenate it */
X  for( link = Down(x);  link != x;  link = NextDown(link) )
X  { Child(y, link);
X    if( type(y) != WORD )  continue;
X    debug1(DHY, DD, "Hyphenate() examining %s", EchoObject(null, y));
X
X    /* start := index of y's first letter, stop := index following last */
X    key = string(y);  class = T->class;
X    for( start = 0;  class[key[start]] == PUNCT_CLASS;  start++ );
X    for( stop = start;  class[key[stop]] > PUNCT_CLASS;  stop++ );
X
X    /* if a - ended the run, hyphenate there only */
X    if( key[stop] == '-' )
X    { next_link = NextDown(link);
X      z = MakeWord(&key[stop+1], &fpos(y));
X      word_font(z) = word_font(y);
X      FontAtomSize(z);
X      Link(NextDown(link), z);
X      z = New(GAP_OBJ);
X      SetGap(gap(z), FALSE, TRUE, FIXED_UNIT, HYPH_MODE, 0);
X      Link(NextDown(link), z);
X      Link(z, MakeWord("0ch", &fpos(y)));
X      key[stop + 1] = '\0';
X      FontAtomSize(y);
X      link = PrevDown(next_link);
X      continue;
X    }
X
X    /* don't hyphenate if less than 5 letters, or a kill char is nearby */
X    if( stop - start < 5 )  continue;
X    if( key[stop] != '\0' && class[key[stop]] == KILL_CLASS )  continue;
X
X    /* let str[] be the converted substring, let rate[] be all '0' */
X    str[0] = PUNCT_CLASS;  rate[0] = '0';
X    for( i = 0;  i < stop - start;  i++ )
X    { str[i+1] = class[key[start + i]];
X      rate[i+1] = '0';
X    }
X    str[i+1] = PUNCT_CLASS;  rate[i+1] = '0';
X    str[i+2] = '\0';  rate[i+2] = '0';
X    rate[i+3] = '\0';
X    ifdebug(DHY, DD, ShowRate(key, start, stop, rate, stderr));
X
X    /* for each suffix of str[], accumulate patterns matching its prefixes */
X    ss = str;
X    do
X    {
X      ifdebug(DHY, DD,
X    fprintf(stderr, "trying suffix \"");
X    for( p = ss; *p != 0;  p++ )  fprintf(stderr, "%c", findrep(*p, T));
X    fprintf(stderr, "\"\n");
X      );
X
X      /* accumulate all prefixes of ss */
X      curr_node = 0;  s = ss;
X      for(;;)
X      {
X    /* if curr_node has empty string, that is one prefix */
X    pos = T->node_mem[curr_node];
X    if( pos < 0 )
X    { AccumulateRating(&T->string_mem[- pos], rate+(ss-str));
X      debug1(DHY, DD, " found %s", &(T->string_mem[- pos]));
X    }
X
X    /* if ss is finished, no other prefixes are possible */
X    if( *s == '\0' )  break;
X
X    /* determine next_node and break if empty */
X    next_node = T->node_mem[curr_node + *s];
X    if( next_node == 0 )  break;
X
X    /* if next_node is a string, check whether it is a prefix of ss */
X    if( next_node < 0 )
X    { rem = &(T->string_mem[-next_node]);
X      do
X      { if( *rem == '\0' )
X        { AccumulateRating(rem+1, rate+(ss-str));
X          debug1(DHY, DD, " found %s", rem+1);
X          break;
X        }
X      } while( *++s == *rem++ );
X      break;
X    }
X
X    /* otherwise go on to the next trie node */
X    curr_node = 2*next_node;  s++;
X      }
X    } while( *(++ss + 2) != PUNCT_CLASS );
X    ifdebug(DHY, DD, ShowRate(key, start, stop, rate, stderr));
X
X    /* now rate[] has accumulated ratings; use it to perform hyphenations */
X    hyphenated = FALSE;
X    /* hyphenate after any concluding - */
X    /* *** now doing this at start only (see above)
X    if( key[stop] == '-' )
X    {
X      z = MakeWord(&key[stop+1], &fpos(y));
X      word_font(z) = word_font(y);
X      FontAtomSize(z);
X      Link(NextDown(link), z);
X      z = New(GAP_OBJ);
X      SetGap(gap(z), FALSE, TRUE, FIXED_UNIT, HYPH_MODE, 0);
X      Link(NextDown(link), z);
X      Link(z, MakeWord("0ch", &fpos(y)));
X      key[stop + 1] = '\0';
X      hyphenated = TRUE;
X    }
X    *** */
X    next_link = NextDown(link);
X    for( i = stop - start - 1;  i >= 3;  i-- )
X    {
X      /* hyphenate at i if rate[i] is odd */
X      if( is_odd(rate[i]) )
X      {    z = MakeWord(&key[start+i-1], &fpos(y));
X    word_font(z) = word_font(y);
X    FontAtomSize(z);
X    Link(NextDown(link), z);
X    z = New(GAP_OBJ);
X    SetGap(gap(z), FALSE, TRUE, FIXED_UNIT, HYPH_MODE, 0);
X    Link(NextDown(link), z);
X    Link(z, MakeWord("0ch", &fpos(y)));
X    key[start + i - 1] = '\0';
X    hyphenated = TRUE;
X      }
X    }
X    if( hyphenated )
X    { FontAtomSize(y);
X      link = PrevDown(next_link);
X    }
X
X  } /* end for each word */
X
X  debug1(DHY, DD, "Hyphenate returning %s", EchoObject(null, x));
X  return x;
X} /* end Hyphenate */
X
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  unsigned char *TrieRetrieve(key, T)                                      */
X/*                                                                           */
X/*  Retrieve the value associated with key in T, or NULL if not present.     */
X/*                                                                           */
X/*****************************************************************************/
X#if DEBUG_ON
X
Xunsigned char *TrieRetrieve(key, T)
Xunsigned char *key;  TRIE T;
X{ unsigned char str[MAX_LINE];  int i, curr_node, next_node, pos;
X  debug1(DHY, DD, "TrieRetrieve(%s, T)", key);
X  ClassConvert(key, str, T);
X
X  /* invariant: curr_node is an existing node of T with prefix str[0..i-1] */
X  curr_node = i = 0;
X  for(;;)
X  {
X    /* if next_node is 0, the string was never inserted */
X    next_node = T->node_mem[curr_node + str[i]];
X    if( next_node == 0 )  return (unsigned char *) NULL;
X
X    /* if next_node < 0 it represents an offset into the string memory */
X    if( next_node < 0 )
X    { pos = - next_node;
X      if( str[i] != '\0' )
X      {    do
X    { if( str[++i] != T->string_mem[pos++] )  return (unsigned char *) NULL;
X    } while( str[i] != '\0' );
X      }
X      return &(T->string_mem[pos]);
X    }
X
X    /* otherwise next_node is the trie node to be searched next */
X    curr_node = 2*next_node;  i++;
X  }
X} /* end TrieRetrieve */
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  ShowRate(key, start, stop, rate, fp)                                     */
X/*                                                                           */
X/*  Debug print of key[] and rate[] on file fp.                              */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic ShowRate(key, start, stop, rate, fp)
Xunsigned char *key;  int start, stop;  unsigned char *rate;  FILE *fp;
X{ int i;
X  fprintf(fp, "key:    ");
X  for( i = start;  i < stop;  i++ )  fprintf(fp, " %c", key[i]);
X  fprintf(fp, "\nrate:");
X  for( i = 0;  rate[i] != '\0';  i++ )  fprintf(fp, " %c", rate[i]);
X  fprintf(fp, "\n");
X} /* end ShowRate */
X
X
X/*@@**************************************************************************/
X/*                                                                           */
X/*  DoTriePrint(T, node, len, fp)                                            */
X/*                                                                           */
X/*  Print on file fp the subset of the entries of trie T stored in node and  */
X/*  its descendants.  The node has prefix prefix[0..len-1].                  */
X/*                                                                           */
X/*****************************************************************************/
X
Xstatic unsigned char prefix[MAX_LINE];
X
Xstatic DoTriePrint(T, node, len, fp)
XTRIE T; int node, len; FILE *fp;
X{ int i, next_node, pos;
X  for( i = 0;  i < T->class_count;  i++ )
X  {
X    /* if next_node < 0, have string to print */
X    next_node = T->node_mem[node + i];
X    if( next_node < 0 )
X    {
X      prefix[len] = '\0';
X      fprintf(fp, "%s", prefix);
X      pos = - next_node;
X      if( i != 0 )
X      {
X    fprintf(fp, "%c", findrep(i, T));
X    while( T->string_mem[pos] != '\0' )
X    { fprintf(fp, "%c", findrep(T->string_mem[pos], T));
X      pos++;
X    }
X    pos++;
X      }
X      fprintf(fp, " %s\n", &(T->string_mem[pos]));
X    }
X
X    /* else if next_node > 0 have a child node to explore */
X    else if( next_node > 0 )
X    { assert( i > 0, "DoTriePrint: i == 0!" );
X      prefix[len] = findrep(i, T);
X      prefix[len+1] = '\0';
X      DoTriePrint(T, 2*next_node, len+1, fp);
X    }
X  }
X} /* end DoTriePrint */
X
X
X/*****************************************************************************/
X/*                                                                           */
X/*  TriePrint(T, fp)                                                         */
X/*                                                                           */
X/*  Print trie T on file fp.                                                 */
X/*                                                                           */
X/*****************************************************************************/
X
XTriePrint(T, fp)
XTRIE T;  FILE *fp;
X{ int i, j, ch;
X  assert( T-> magic == TRIE_MAGIC, "TriePrint: magic!" );
X  fprintf(fp, "Classes:");
X  for( i = 1;  i < T->class_count;  i++ )
X  { fprintf(fp, " ");
X    for( ch = 0;  ch < MAX_CHAR;  ch++ )
X      if( T->class[ch] == i )  fprintf(fp, "%c", ch);
X  }
X  fprintf(fp, "\n");
X  fprintf(fp, "Node space: %d capacity, %d used\n", T->node_lim, T->node_free);
X  fprintf(fp, "String space: %d capacity, %d used\n", T->string_lim,
X    T->string_lim - T->string_first);
X  prefix[0] = '\0';
X  DoTriePrint(T, 0, 0, fp);
X} /* end TriePrint */
X#endif
END_OF_FILE
  if test 31731 -ne `wc -c <'lout/z36.c'`; then
    echo shar: \"'lout/z36.c'\" unpacked with wrong size!
  fi
  # end of 'lout/z36.c'
fi
echo shar: End of archive 8 \(of 30\).
cp /dev/null ark8isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 30 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still must unpack the following archives:
    echo "        " ${MISSING}
fi
exit 0
exit 0 # Just in case...