#!/usr/common/bin/perl
do "getopts.pl" || die "$!";
do Getopts('imnd:l:');

do "TeXthings";

$sectionref='a'; $i=0;
if($opt_l)
 { open(LOGFILE,">$opt_l") || die "$!"; }
  
while(<>)
{
#  s/\n$//;
  s/^@//;
# expand wildcard references here, then process as normal
  if(/^(use|defn) (.*)\.{3}$/)
    { print LOGFILE "Wildcard `$2...', expands to  " if $opt_l;
      @matches=grep(/^$2.*/i,split(/¤/,$known));
      if($#matches>0)
        { 
          print LOGFILE "[",join('][',@matches),"] " if $opt_l;
          print STDERR "Ambiguous module name `$mod...', line $i\n";
          print STDERR "Matches: [",join('][',@matches),"]\n";
          print STDERR "Using `",@matches[0],"'\n";
          #die "\nAmbiguous module name `$mod...', line $i"; 
        }
      elsif($#matches==-1)
        { 
          die "\nNo match for name `$mod...', line $i";
        }
      $mn=@matches[0];
      if($mn=~/\[\[/) { $mn=&convquotes($mn); }
      print LOGFILE $mn,"\n" if $opt_l;
      $_="$1 $mn";
    }

# process a <<defn>>=
  if(/^defn (.*)$/)
    { print LOGFILE "Defining chunk `$1' with macro $sectionref\n" if $opt_l;
      $md=$1; $mn=$1; if($opt_n) { $md=~tr/A-Z/a-z/; }
      $mt=$md;
      $mt=~s/([*+.?{}()])/\\\1/g;
      if($known!~/¤$mt/) { $known=$known . "¤$md"; }
      @names{$md}=1; $currentmod=$md;
      @defines{$md}=@defines{$md} . "\\\\{\\xp\\z$sectionref}";
      #if($mn=~/\[\[/) { $mn=&convquotes($mn); }
      @lines[$i]="defn z$sectionref $mn\n"; $oldref=$sectionref;
      $sectionref++;
      push(@uses,$i);
      $indxing=0;
    }
# process a <<use>>
  elsif(/^use (.*)$/)
    { print LOGFILE "Using chunk `$1' in chunk $oldref\n" if $opt_l;
      $md=$1; $mn=$1; if($opt_n) { $md=~tr/A-Z/a-z/; }
      $mt=$md;
      $mt=~s/([*+.?{}()])/\\\1/g;
      if($known!~/¤$mt/) { $known=$known . "¤$md"; }
      @reference{$md}=@reference{$md} . "\\\\{\\xp\\z$oldref}";
      #if($mn=~/\[\[/) { $mn=&convquotes($mn); }
      @lines[$i]="use z$oldref $mn\n";
      push(@uses,$i); 
      $indxing=0;
    }
# process identifier information
  elsif(/^index (nl|defn |use )(.*)/)
    {  
      if($2 eq '|') { $indxing=1; }
      else
      { if($2)
        { print LOGFILE "Identifier `$2' indexed as " if $opt_l;
          if($1 eq "defn " && !$indxing)
           { print LOGFILE "defined [$oldref]\n" if $opt_l;
             $style="";
           }
          else
           { print LOGFILE "used [$oldref]\n" if $opt_l;
             $style="\\it";
           }
          @variables{$2}=@variables{$2} . ",\\thinspace{$style\\xp\\z$oldref}";
        }
      }
      $i--; # don't put this line in the file here
    }
# stick the line in the array
  else { @lines[$i]=$_; }
  $i++;
}

if($opt_l)
 {
   print LOGFILE "\n\nList of modules currently defined\n";
   print LOGFILE join("\n",sort keys(defines));
   print LOGFILE "\n\nList of modules currently referenced\n";
   print LOGFILE join("\n",sort keys(reference));
   print LOGFILE "\n\n";
 }
 
foreach(keys(reference))
 { @longlist{$_}=@reference{$_}; }

foreach(keys(defines))
 { @longlist{$_}=@longlist{$_} . ('%' . @defines{$_}); }

foreach(@uses)
 { 
   $ref=@lines[$_];
   $ref=~/^(use|defn) (z[a-z]+) (.*)/;
   $mn=$3; $dr=$2; $ac=$1;
   $defns=@defines{$mn};
   print LOGFILE "Module $mn " if $opt_l;
   if($ac eq 'defn')
    { $uses=@reference{$mn}; $uses="{$uses}|";
      print LOGFILE "defined at line $_, $uses\n" if $opt_l;
    }
   else
    { $uses=''; 
      print LOGFILE "referenced at line $_\n" if $opt_l;
    }
   print LOGFILE "Line $_ modified to `$ac $dr {$defns} $uses$mn'\n" if $opt_l;
   $mn=&convquotes($mn);
   @lines[$_]="$ac $dr|{$defns}|$uses $mn\n";
 }
        
print STDOUT "header tex \n",@lines;

# now @longlist{MOD} contains a list of all the references to <MOD>
# sort them to make them look pretty

if($opt_m)
  {
    print LOGFILE "Making module index...\n" if $opt_l;
    print "index mods\n";
    foreach(sort keys(longlist))
      {
        $defns=@defines{$_};
        $defns=~s/^,\\\\thinspace//;
        print LOGFILE "Module <$_ $defns> ",@reference{$_},"\n" if $opt_l;
       # first we print the module name and defining numbers
        print "entry {\\LA ",&convquotes($_),"\\ \\xwp{$defns}\\RA}\\quad";
       # now we print the bit after that : assume foot=cmr8
        print "{\\foot\\xtc{",@reference{$_},"}}\n";
      }
    print "end index\n";
  }

if($opt_i)
  {
    print "index ids\n";
    foreach(sort keys(variables))
     {
        $vars=@variables{$_};
        $vars=~s/^,\\thinspace//;
        print "entry {\\code ",&TeXliteral($_),"\\edoc} :\\quad",$vars,"\n";
      }
    print "end index\n";
  }
  
print STDOUT "trailer tex\n";

sub usage_info
{
  local($line)=@_;
  @ixrefs=sort(split(/%/,@reference{$line}));
  if($#ixrefs==-1)
    { return "This code is never referenced. It may be a root module.";}
  elsif($#ixrefs==0)
    { return "This code is used in section ",@ixrefs[0]; }
  else
    { $lastref=pop(@ixrefs);
      return "This code is used in sections ",join(",\\,",@ixrefs)," and $lastref";
    }
}