texinfo.tex

压缩包中包含LINUX下多个命令的源码

% @center line   outputs that line, centered

\def\center{\parsearg\centerzzz}
\def\centerzzz #1{{\advance\hsize by -\leftskip
\advance\hsize by -\rightskip
\centerline{#1}}}

% @sp n   outputs n lines of vertical space

\def\sp{\parsearg\spxxx}
\def\spxxx #1{\vskip #1\baselineskip}

% @comment ...line which is ignored...
% @c is the same as @comment
% @ignore ... @end ignore  is another way to write a comment

\def\comment{\begingroup \catcode`\^^M=\other%
\catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
\commentxxx}
{\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}

\let\c=\comment

% @paragraphindent NCHARS
% We'll use ems for NCHARS, close enough.
% We cannot implement @paragraphindent asis, though.
% 
\def\asisword{asis} % no translation, these are keywords
\def\noneword{none}
%
\def\paragraphindent{\parsearg\doparagraphindent}
\def\doparagraphindent#1{%
  \def\temp{#1}%
  \ifx\temp\asisword
  \else
    \ifx\temp\noneword
      \defaultparindent = 0pt
    \else
      \defaultparindent = #1em
    \fi
  \fi
  \parindent = \defaultparindent
}

% @exampleindent NCHARS
% We'll use ems for NCHARS like @paragraphindent.
% It seems @exampleindent asis isn't necessary, but
% I preserve it to make it similar to @paragraphindent.
\def\exampleindent{\parsearg\doexampleindent}
\def\doexampleindent#1{%
  \def\temp{#1}%
  \ifx\temp\asisword
  \else
    \ifx\temp\noneword
      \lispnarrowing = 0pt
    \else
      \lispnarrowing = #1em
    \fi
  \fi
}

% @asis just yields its argument.  Used with @table, for example.
%
\def\asis#1{#1}

% @math outputs its argument in math mode.
% We don't use $'s directly in the definition of \math because we need
% to set catcodes according to plain TeX first, to allow for subscripts,
% superscripts, special math chars, etc.
% 
% @math does not do math typesetting in section titles, index
% entries, and other such contexts where the catcodes are set before
% @math gets a chance to work.  This could perhaps be fixed, but for now
% at least we can have real math in the main text, where it's needed most.
%
\let\implicitmath = $%$ font-lock fix
%
% One complication: _ usually means subscripts, but it could also mean
% an actual _ character, as in @math{@var{some_variable} + 1}.  So make
% _ within @math be active (mathcode "8000), and distinguish by seeing
% if the current family is \slfam, which is what @var uses.
% 
{\catcode95 = \active  % 95 = _
\gdef\mathunderscore{%
  \catcode95=\active
  \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
}}
%
% Another complication: we want \\ (and @\) to output a \ character.
% FYI, plain.tex uses \\ as a temporary control sequence (why?), but
% this is not advertised and we don't care.  Texinfo does not
% otherwise define @\.
% 
% The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
\def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
%
\def\math{%
  \tex
  \mathcode`\_="8000 \mathunderscore
  \let\\ = \mathbackslash
  \implicitmath\finishmath}
\def\finishmath#1{#1\implicitmath\Etex}

% @bullet and @minus need the same treatment as @math, just above.
\def\bullet{\implicitmath\ptexbullet\implicitmath}
\def\minus{\implicitmath-\implicitmath}

% @refill is a no-op.
\let\refill=\relax

% If working on a large document in chapters, it is convenient to
% be able to disable indexing, cross-referencing, and contents, for test runs.
% This is done with @novalidate (before @setfilename).
%
\newif\iflinks \linkstrue % by default we want the aux files.
\let\novalidate = \linksfalse

% @setfilename is done at the beginning of every texinfo file.
% So open here the files we need to have open while reading the input.
% This makes it possible to make a .fmt file for texinfo.
\def\setfilename{%
   \iflinks
     \readauxfile
   \fi % \openindices needs to do some work in any case.
   \openindices
   \fixbackslash  % Turn off hack to swallow `\input texinfo'.
   \global\let\setfilename=\comment % Ignore extra @setfilename cmds.
   %
   % If texinfo.cnf is present on the system, read it.
   % Useful for site-wide @afourpaper, etc.
   % Just to be on the safe side, close the input stream before the \input.
   \openin 1 texinfo.cnf
   \ifeof1 \let\temp=\relax \else \def\temp{\input texinfo.cnf }\fi
   \closein1
   \temp
   %
   \comment % Ignore the actual filename.
}

% Called from \setfilename.
%
\def\openindices{%
  \newindex{cp}%
  \newcodeindex{fn}%
  \newcodeindex{vr}%
  \newcodeindex{tp}%
  \newcodeindex{ky}%
  \newcodeindex{pg}%
}

% @bye.
\outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}


\message{pdf,}
% adobe `portable' document format
\newcount\tempnum
\newcount\lnkcount
\newtoks\filename
\newcount\filenamelength
\newcount\pgn
\newtoks\toksA
\newtoks\toksB
\newtoks\toksC
\newtoks\toksD
\newbox\boxA
\newcount\countA
\newif\ifpdf
\newif\ifpdfmakepagedest

\ifx\pdfoutput\undefined
  \pdffalse
  \let\pdfmkdest = \gobble
  \let\pdfurl = \gobble
  \let\endlink = \relax
  \let\linkcolor = \relax
  \let\pdfmakeoutlines = \relax
\else
  \pdftrue
  \pdfoutput = 1
  \input pdfcolor
  \def\dopdfimage#1#2#3{%
    \def\imagewidth{#2}%
    \def\imageheight{#3}%
    % without \immediate, pdftex seg faults when the same image is
    % included twice.  (Version 3.14159-pre-1.0-unofficial-20010704.)
    \ifnum\pdftexversion < 14
      \immediate\pdfimage
    \else
      \immediate\pdfximage
    \fi
      \ifx\empty\imagewidth\else width \imagewidth \fi
      \ifx\empty\imageheight\else height \imageheight \fi
      \ifnum\pdftexversion<13
	 #1.pdf%
       \else
         {#1.pdf}%
       \fi
    \ifnum\pdftexversion < 14 \else
      \pdfrefximage \pdflastximage
    \fi}
  \def\pdfmkdest#1{{\normalturnoffactive \pdfdest name{#1} xyz}}
  \def\pdfmkpgn#1{#1}
  \let\linkcolor = \Blue  % was Cyan, but that seems light?
  \def\endlink{\Black\pdfendlink}
  % Adding outlines to PDF; macros for calculating structure of outlines
  % come from Petr Olsak
  \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
    \else \csname#1\endcsname \fi}
  \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
    \advance\tempnum by1
    \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
  \def\pdfmakeoutlines{{%
    \openin 1 \jobname.toc
    \ifeof 1\else\begingroup
      \closein 1 
      \indexnofonts
      \def\tt{}
      \let\_ = \normalunderscore
      % Thanh's hack / proper braces in bookmarks  
      \edef\mylbrace{\iftrue \string{\else}\fi}\let\{=\mylbrace
      \edef\myrbrace{\iffalse{\else\string}\fi}\let\}=\myrbrace
      %
      \def\chapentry ##1##2##3{}
      \let\appendixentry = \chapentry
      \def\unnumbchapentry ##1##2{}
      \def\secentry ##1##2##3##4{\advancenumber{chap##2}}
      \def\unnumbsecentry ##1##2##3{\advancenumber{chap##2}}
      \def\subsecentry ##1##2##3##4##5{\advancenumber{sec##2.##3}}
      \def\unnumbsubsecentry ##1##2##3##4{\advancenumber{sec##2.##3}}
      \def\subsubsecentry ##1##2##3##4##5##6{\advancenumber{subsec##2.##3.##4}}
      \def\unnumbsubsubsecentry ##1##2##3##4##5{\advancenumber{subsec##2.##3.##4}}
      \input \jobname.toc
      \def\chapentry ##1##2##3{%
        \pdfoutline goto name{\pdfmkpgn{##3}}count-\expnumber{chap##2}{##1}}
      \let\appendixentry = \chapentry
      \def\unnumbchapentry ##1##2{%
        \pdfoutline goto name{\pdfmkpgn{##2}}{##1}}
      \def\secentry ##1##2##3##4{%
        \pdfoutline goto name{\pdfmkpgn{##4}}count-\expnumber{sec##2.##3}{##1}}
      \def\unnumbsecentry ##1##2##3{%
        \pdfoutline goto name{\pdfmkpgn{##3}}{##1}}
      \def\subsecentry ##1##2##3##4##5{%
        \pdfoutline goto name{\pdfmkpgn{##5}}count-\expnumber{subsec##2.##3.##4}{##1}}
      \def\unnumbsubsecentry ##1##2##3##4{%
        \pdfoutline goto name{\pdfmkpgn{##4}}{##1}}
      \def\subsubsecentry ##1##2##3##4##5##6{%
        \pdfoutline goto name{\pdfmkpgn{##6}}{##1}}
      \def\unnumbsubsubsecentry ##1##2##3##4##5{%
        \pdfoutline goto name{\pdfmkpgn{##5}}{##1}}
      \input \jobname.toc
    \endgroup\fi
  }}
  \def\makelinks #1,{%
    \def\params{#1}\def\E{END}%
    \ifx\params\E
      \let\nextmakelinks=\relax
    \else
      \let\nextmakelinks=\makelinks
      \ifnum\lnkcount>0,\fi
      \picknum{#1}%
      \startlink attr{/Border [0 0 0]} 
        goto name{\pdfmkpgn{\the\pgn}}%
      \linkcolor #1%
      \advance\lnkcount by 1%
      \endlink
    \fi
    \nextmakelinks
  }
  \def\picknum#1{\expandafter\pn#1}
  \def\pn#1{%
    \def\p{#1}%
    \ifx\p\lbrace
      \let\nextpn=\ppn
    \else
      \let\nextpn=\ppnn
      \def\first{#1}
    \fi
    \nextpn
  }
  \def\ppn#1{\pgn=#1\gobble}
  \def\ppnn{\pgn=\first}
  \def\pdfmklnk#1{\lnkcount=0\makelinks #1,END,}
  \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
  \def\skipspaces#1{\def\PP{#1}\def\D{|}%
    \ifx\PP\D\let\nextsp\relax
    \else\let\nextsp\skipspaces
      \ifx\p\space\else\addtokens{\filename}{\PP}%
        \advance\filenamelength by 1
      \fi
    \fi
    \nextsp}
  \def\getfilename#1{\filenamelength=0\expandafter\skipspaces#1|\relax}
  \ifnum\pdftexversion < 14
    \let \startlink \pdfannotlink
  \else
    \let \startlink \pdfstartlink
  \fi
  \def\pdfurl#1{%
    \begingroup
      \normalturnoffactive\def\@{@}%
      \let\value=\expandablevalue
      \leavevmode\Red
      \startlink attr{/Border [0 0 0]}%
        user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
        % #1
    \endgroup}
  \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
  \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
  \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
  \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
  \def\maketoks{%
    \expandafter\poptoks\the\toksA|ENDTOKS|
    \ifx\first0\adn0
    \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
    \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
    \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9 
    \else
      \ifnum0=\countA\else\makelink\fi
      \ifx\first.\let\next=\done\else
        \let\next=\maketoks
        \addtokens{\toksB}{\the\toksD}
        \ifx\first,\addtokens{\toksB}{\space}\fi
      \fi
    \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
    \next}
  \def\makelink{\addtokens{\toksB}%
    {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
  \def\pdflink#1{%
    \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
    \linkcolor #1\endlink}
  \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
\fi % \ifx\pdfoutput


\message{fonts,}
% Font-change commands.

% Texinfo sort of supports the sans serif font style, which plain TeX does not.
% So we set up a \sf analogous to plain's \rm, etc.
\newfam\sffam
\def\sf{\fam=\sffam \tensf}
\let\li = \sf % Sometimes we call it \li, not \sf.

% We don't need math for this one.
\def\ttsl{\tenttsl}

% Default leading.
\newdimen\textleading  \textleading = 13.2pt

% Set the baselineskip to #1, and the lineskip and strut size
% correspondingly.  There is no deep meaning behind these magic numbers
% used as factors; they just match (closely enough) what Knuth defined.
%
\def\lineskipfactor{.08333}
\def\strutheightpercent{.70833}
\def\strutdepthpercent {.29167}
%
\def\setleading#1{%
  \normalbaselineskip = #1\relax
  \normallineskip = \lineskipfactor\normalbaselineskip
  \normalbaselines
  \setbox\strutbox =\hbox{%
    \vrule width0pt height\strutheightpercent\baselineskip
                    depth \strutdepthpercent \baselineskip
  }%
}

% Set the font macro #1 to the font named #2, adding on the
% specified font prefix (normally `cm').
% #3 is the font's design size, #4 is a scale factor
\def\setfont#1#2#3#4{\font#1=\fontprefix#2#3 scaled #4}

% Use cm as the default font prefix.
% To specify the font prefix, you must define \fontprefix
% before you read in texinfo.tex.
\ifx\fontprefix\undefined
\def\fontprefix{cm}
\fi
% Support font families that don't use the same naming scheme as CM.
\def\rmshape{r}
\def\rmbshape{bx}               %where the normal face is bold
\def\bfshape{b}
\def\bxshape{bx}
\def\ttshape{tt}