% prologue.cfg
 % ============

 % This TeX file permits loading of third-party macros before 
 % Gerolf Markup Shredder gets initialized. 
 % GMS uses macros defined in Donald Knuth's 'plain.tex'.
 % The file 'hyphen.tex' which is loaded by 'plain.tex' 
 % should be set to '\endinput'.
 
 % ============================================================================
  
 % Basic character categories of plain.tex:
  
     \catcode`\{=1 % begin-group
     \catcode`\}=2 % end-group
     \catcode`\#=6 % macro parameter 
     \catcode `\@ = 11 % letter 
 
 % Disable plain.tex's register logging (which makes 'gerolf.log' unreadable):
 
     \let \backupwrite \write
     \countdef \m@ne = 22  \m@ne =-1
 
     \def \write #1#2{%
       \edef \first {#1}%
       \def \test {\m@ne}%
       \ifx \first \test \else \immediate \backupwrite #1{#2}\fi}
 
 % Disable preloading of 'more fonts' in 'plain.tex':
 
     \let \backupfont \font
     \long \def \gulp #1cmssbx10 scaled \magstep 2{}
 
     \def \gulpfont {%
       \ifx \second \test \let \next \gulp \else 
         \let \next \relax \fi \next}
         
     \def \testfont {%
       \ifx \second \test \let \next \dofont \else 
         \let \next \relax \fi \next}    
 
     \def \font #1=#2 {%
       \def \second {#2}%
       \def \dofont {\backupfont #1=#2 }%
       \def \test {cmr10}\testfont
       \def \test {cmr7}\testfont
       \def \test {cmr5}\testfont
       \def \test {cmmi10}\testfont
       \def \test {cmmi7}\testfont
       \def \test {cmmi5}\testfont
       \def \test {cmbx10}\testfont
       \def \test {cmbx7}\testfont
       \def \test {cmbx5}\testfont
       \def \test {cmsy10}\testfont
       \def \test {cmsy7}\testfont
       \def \test {cmsy5}\testfont
       \def \test {cmex10}\testfont
       \def \test {cmsl10}\testfont
       \def \test {cmti10}\testfont
       \def \test {cmtt10}\testfont
       \def \test {cmdunh10}\gulpfont}
   
 % Load plain.tex:
 
   % Another wrapper for plain.tex (not necessary, disabled by default: 
   % \input etex.src
 
   % Required (but may be loaded via etex.src), enabled by default: 
     \input plain.tex

 % Hide above definitions: 
 
     \let \font \backupfont 
     \let \backupfont \undefined
     \let \gulp \undefined
     \let \gulpfont \undefined
     \let \testfont \undefined 
      
 % Load other TeX macro definitions (disabled by default):
   
   % \input anyother.tex

 % Now comes Markup Shredder code.
 
 % This will display register numbers in 'gerolf.log' if defined
 % (only for debugging purposes, disabled by default): 
  
 % \def \GMSdisplayregs {1}
 
 % This will switch off a few GMS features if defined 
 % (only for debugging purposes, disabled by default): 
  
 % \def \GMSfastini {1}
 
 % \endinput