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cases.sty	7.55 KB	-rw-r--r--
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concrete.sty	1.1 KB	-rw-r--r--
dblfloatfix.sty	7.16 KB	-rw-r--r--
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flashcard.cls	6.34 KB	-rw-r--r--
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parskip.sty	2.7 KB	-rw-r--r--
path.sty	13.79 KB	-rw-r--r--
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Code Editor : path.sty

%%%  @LaTeX-style-file
%%%  {
%%%     author          = "Philip Taylor",
%%%     version         = "3.03b",
%%%     date            = "22 July 1997",
%%%     time            = "15:59:31 BST",
%%%     filename        = "path.sty",
%%%     address         = "The Computer Centre
%%%                        RHBNC, University of London
%%%                        Egham Hill
%%%                        Egham, Surrey TW20 0EX, ENGLAND",
%%%     telephone       = "Tel:   +44 1784 443172",
%%%     FAX             = "Fax:   +44 1784 434348",
%%%     email           = "P.Taylor@Vms.Rhbnc.Ac.Uk",
%%%     codetable       = "ISO/ASCII",
%%%     keywords        = "file name, filename, path name, pathname,
%%%                        discretionary, discretionaries",
%%%     supported       = "yes",
%%%     docstring       = {Computer filenames, host names, and e-mail
%%%                        addresses tend to be long strings that
%%%                        cause line breaking problems for TeX.
%%%                        Sometimes rather long strings are
%%%                        encountered, such as:
%%%
%%%                        mighty-mouse-gw.scrc.symbolics.com
%%%
%%%                        This file defines a macro, \path|...|,
%%%                        similar to LaTeX's \verb|...| macro, that
%%%                        sets the text in the typewriter font,
%%%                        allowing hyphen-less line breaks at
%%%                        punctuation characters.
%%%
%%%                        The default set of punctuation characters is
%%%                        defined as
%%%
%%%                        \discretionaries |~!@$%^&*()_+`-=#{"}[]:;'<>,.?\/|
%%%
%%%                        However, you can change it as needed, for
%%%                        example
%%%
%%%                        \discretionaries +@%!.+
%%%
%%%                        would assign to it the set @ % ! . which
%%%                        commonly occur in electronic mail addresses.
%%%
%%%                        The delimiter characters surrounding the
%%%                        arguments to \discretionaries and \path
%%%                        will normally be a punctuation character not
%%%                        found in the argument, and not otherwise
%%%                        significant to TeX.  In particular, backslash
%%%                        cannot be used as a delimiter.  In the rare
%%%                        event that this is required, set
%%%
%%%                        \specialpathdelimiterstrue
%%%
%%%                        This practice is not recommended, because TeX
%%%                        then runs about four times slower while it is
%%%                        typesetting \path\...\ requests.
%%%                        \specialpathdelimitersfalse is the normal
%%%                        setting.
%%%
%%%                        This file may be used in Plain TeX or AmSTeX
%%%                        by
%%%
%%%                        \input path.sty
%%%
%%%                        and in LaTeX by
%%%
%%%                        \usepackage {path}
%%%
%%%                        The checksum field above, if present, 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.
%%%                       }
%%%  }
%%% ====================================================================

% ======================================================================
%
%                          The \path Macro
%
% An early prototype of this code which was developed by Nelson H. F.
% Beebe <beebe@math.utah.edu> used a recursive macro to peel off one
% character at a time, then with a nest of \ifx statements, test for
% each punctuation character, and if one is found, insert discretionary
% linebreaks in the form of \- or \penalty0.  While this usually works,
% it is not entirely satisfactory, because the nested \ifx statements
% are ugly, and the recursion can exhaust TeX's macro stack for
% arguments longer than about 30 characters.
%
% A second version by NHFB built upon the ideas used by the LaTeX
% \verb|...| macro; this was mostly successful, but was flawed by its
% inability to handle at least the three characters ^ [ ], by loss of
% use of @ for naming internal private macros, and by its inability to
% allow the set of characters at which breaks are permissible.
%
% The problem was then passed off to Philip Taylor, who wrote this third
% version which fully solves the problem.  Phil therefore gets the
% author credit in the file header above.  [Gee, thanks !  ** Phil]
%
% Revision history (reverse time order):
%
% 3.03b [22-Jul-1997]
% Summary:   No code changes.  An out-of-date example removed, the syntax
%            for LaTeX2e changed to "\usepackage {path}", and the "checksum"
%            comments modified to indicate that the checksum is not necessarily
%            present.  The initial opening brace re-positioned to align
%            with the matching closing brace, and the inner closing brace
%            re-positioned to align with the inner opening brace.  A check made
%            to ensure that no <tab> characters are present.
%
% 3.03a [22-Jul-1997]
% Summary:   No code changes from V3.03; e-mail addresses, telephone numbers,
%            etc. amended to reflect current situation.  Checksum removed.
%
% 3.03 [03-Dec-1991]
% Problem:   A \path|...| entry in a LaTeX index is set with an
%            preceding blank line.
% Solution:  Add \leavevmode before \hbox{}; without it, an extra blank
%            line gets typeset before every invocation of \path in a
%            LaTeX theindex environment.
% Diagnosis: To avoid hyphenation, the expansion of \path starts with
%            an \hbox{} (c.f. the TeXbook, p. 454); LaTeX indices are
%            basically set in vertical mode, with each index entry a
%            paragraph in its own right; when an \hbox {} is
%            encountered in vmode, it is typeset in vmode, and TeX
%            continues; the first real character is encountered, and
%            TeX enters unrestricted horizontal mode.  The \hbox {} and
%            the first character are therefore on separate lines,
%            separated by \baselineskip.
%
% 3.02 [23-Oct-1991 13:45:12]
% First released version.
% ======================================================================

\immediate\write16{This is path.sty, Version 3.03 <03-Dec-1991>}

%%% We will regrettably need one \count variable with an open name,
%%% in which to save the category code of commercial-at ...

\newcount \ATcode
\ATcode = \catcode `\@

%%% Make commercial-at a letter to provide concealed control sequences

\catcode `\@ = 11

%%% and then declare two \count variables with concealed names

\newcount \c@tcode
\newcount \c@unter

%%% and a boolean variable with an open name, to specify the nature of
%%% the delimiters which will be associated with the \path command

\newif \ifspecialpathdelimiters

%%% We need to define control sequences which expand to both
%%% active and passive spaces ...

\begingroup
\catcode `\ = 10
\gdef \passivesp@ce { }
\catcode `\ = 13\relax%
\gdef\activesp@ce{ }%
\endgroup

%%% \discretionaries will define a macro \discr@ti@n@ri@s which will
%%% make every character between the first and final <delim> a
%%% discretionary breakpoint.

\def \discretionaries %%% <delim> <chars> <delim>
     % start a group (ended in \discr@ti@naries ),
     % make every character (apart from space) active,
     % then transfer control to \discr@tionaries ...
    {\begingroup
        \c@tcodes = 13
        \discr@tionaries
    }

%%% \discr@tionaries will receive as parameter the initial <delim>
%%% which will delimit the set of discretionaries; this <delim>
%%% will be active.

\def \discr@tionaries #1%%% <delim>
     % knowing the initial <delim>, define \discr@ti@naries with a
     % delimited parameter structure, the final delimiter being
     % the second instance of <delim>
    {\def \discr@ti@naries ##1#1%%% <chars> <delim>
          % \discr@ti@naries will receive as parameter the set of
          % characters which are to be made discretionaries; it ends the
          % group and then defines \discr@ti@n@ries, a tail-recursive
          % macro, which will quietly process each of the
          % discretionaries in turn ...
         {\endgroup
          \def \discr@ti@n@ries ####1%%% <char> or <delim>
               % by checking to see if it has reached the end of the
               % list, i.e. comparing its parameter with the known final
               % <delim> ...
              {\if   \noexpand ####1\noexpand #1%
                     % if they match, there is no more to do ...
                     \let \n@xt = \relax
               \else
                     % otherwise the character becomes active and is
                     % defined as a discretionary with the three texts
                     % <self> <empty> <self>, thus suppressing true
                     % hyphenation; the macro then prepares to process
                     % the next character.
                     \catcode `####1 = 13
                     \def ####1{\discretionary
                                  {\char `####1}{}{\char `####1}}%
                     \let \n@xt = \discr@ti@n@ries
               \fi
               % here either tail recursion occurs, if there are more
               % characters to process, or tail recursion ceases if all
               % have been exhausted
               \n@xt
              }%
          % of course, none of this must take place during the \stress
          % {call} of \discretionaries; execution is deferred until
          % another macro such as \path calls the concealed action
          % macro \discr@ti@n@ri@s; we therefore define this macro to
          % have the desired effect.
          \def \discr@ti@n@ri@s {\discr@ti@n@ries ##1#1}%
         }%
     % and finally invoke \discr@ti@naries to process the set of
     % discretionary characters; it will take everything up to the
     % second instance of <delim> as its parameter (and therefore as the
     % set of characters to be processed).
     \discr@ti@naries
    }

%%% \path, which is the user interface to \p@th, first checks
%%% to see whether \specialpathdelimiters is <true> or <false>;
%%% if <true>, it needs to take special action to ensure that
%%% \stress {all} characters (apart from <space>) are acceptable
%%% as delimiters; this is very time-consuming, and should be
%%% avoided if at all possible.  It also defines \endp@th, to
%%% close the appropriate number of groups, and finally transfers
%%% control to \p@th

\def \path
    {\ifspecialpathdelimiters
        \begingroup
        \c@tcodes = 12
        \def \endp@th {\endgroup \endgroup}%
     \else
        \let \endp@th = \endgroup
     \fi
     \p@th
    }

%%% \p@th, which has essentially the same syntax as \discretionaries,
%%% expects to be followed by a <delim>, a <path>, and a second instance
%%% of <delim>; it will typeset <path> in the \tt font with hyphenation
%%% inhibited --- breaks (but not true hyphenation) are allowed at any
%%% or all of the special characters which have
%%% previously been declared as \discretionaries.

\def \p@th #1%%% <delim>
     % it starts by opening a group (ended in \p@@th) ...
     % switches to \tt, and inhibits hyphenation;
     % allows breaks at \discretionaries;  saves the
     % catcode of the initial <delim>, because if it has also been
     % declared within \discretionaries, the initial and final <delim>
     % won't match (which would be a disaster); \c@tcode is overloaded,
     % but there is no conflict that I can detect ...
     % invokes \discr@ti@n@ri@s to render active the set of special
     % characters which have previously been declared as
     % \discretionaries; each of these characters will expand to a real
     % \discretionary, with replacement texts <self> <null> <self>; and
     % re-instates the catcode of the initial <delim>.
    {\begingroup
        \tt
        \c@tcode = \catcode `#1
        \discr@ti@n@ri@s
        \catcode `\ = \active
        \expandafter \edef \activesp@ce {\passivesp@ce \hbox {}}%
        \catcode `#1 = \c@tcode
        % it next defines an inner macro \p@@th with delimited parameter
        % structure, the final delimiter being the same as the initial
        % delimiter which it has itself received as #1.
        \def \p@@th ##1#1% <chars> <delim>
             % Within \p@@th,
             % permissible breakpoints are specified,
             % the path is typeset,
             % and the group(s) ended.
            {\leavevmode \hbox {}##1%
             \endp@th
            }%
     \p@@th
    }

%%% \c@tcodes expects to be followed by the r-h-s of a numeric
%%% assignment optionally including the assignment operator; it saves
%%% the value of the r-h-s in \c@tcode, and invokes \c@tc@des.

\def \c@tcodes {\afterassignment \c@tc@des \c@tcode}

%%% \c@tc@des uses the value saved in \c@tcode, and assigns it to the
%%% \catcode of all characters with the single exception of <space>,
%%% which retains its normal catcode of 10; on exit, every single
%%% character apart from <space> will have the catcode which followed
%%% \c@tcodes.  The code is optimised to avoid unnecessary usage of
%%% save-stack space.

\def \c@tc@des
    {\c@unter = 0
     \loop
            \ifnum \catcode \c@unter = \c@tcode
            \else
                \catcode \c@unter = \c@tcode
            \fi
     \ifnum \c@unter < 255
            \advance \c@unter by 1
     \repeat
     \catcode `\ = 10
    }

%%% We restore the original catcode of commercial-at

\catcode `\@ = \ATcode

%%% Define a default set of discretionary break characters
%%% to include all punctuation characters except vertical
%%% bar

\discretionaries |~!@$%^&*()_+`-=#{}[]:";'<>,.?\/|

\endinput

${this.title}

Code Editor : path.sty