]> git.ipfire.org Git - thirdparty/bird.git/commitdiff
Documentation-generating tool taken from linux-2.3.99-pre6, and
authorPavel Machek <pavel@ucw.cz>
Fri, 28 Apr 2000 09:48:01 +0000 (09:48 +0000)
committerPavel Machek <pavel@ucw.cz>
Fri, 28 Apr 2000 09:48:01 +0000 (09:48 +0000)
makefile to actually use it.

doc/Makefile
doc/kernel-doc [new file with mode: 0755]

index cef98bf3fddbe807a1b763ad80ca6466dcbc83ef..23235f9658b6fe2c52784c09edd9395e040827f5 100644 (file)
@@ -3,7 +3,7 @@
 
 SHELL = /bin/sh
 
-all: bird.html
+all: bird.html internals.html
 
 clean:
        rm *.html *.tex *.dvi *.log
@@ -28,3 +28,6 @@ dnl LATEX format:
 
 %.tex: %.sgml
        ./sgml2latex --output=tex $<
+
+internals.html: ../filter/filter.c
+       kernel-doc -html ../filter/filter.c > internals.html
diff --git a/doc/kernel-doc b/doc/kernel-doc
new file mode 100755 (executable)
index 0000000..b9e872d
--- /dev/null
@@ -0,0 +1,881 @@
+#!/usr/bin/perl
+
+## Copyright (c) 1998 Michael Zucchi, All Rights Reserved        ##
+##                                                               ##
+## This software falls under the GNU Public License. Please read ##
+##              the COPYING file for more information            ##
+
+#
+# This will read a 'c' file and scan for embedded comments in the
+# style of gnome comments (+minor extensions - see below).
+#
+
+# Note: This only supports 'c'.
+
+# usage:
+# kerneldoc [ -docbook | -html | -text | -man ]
+#           [ -function funcname [ -function funcname ...] ] c file(s)s > outputfile
+# or
+#           [ -nofunction funcname [ -function funcname ...] ] c file(s)s > outputfile
+#
+#  Set output format using one of -docbook -html -text or -man.  Default is man.
+#
+#  -function funcname
+#      If set, then only generate documentation for the given function(s).  All
+#      other functions are ignored.
+#
+#  -nofunction funcname
+#      If set, then only generate documentation for the other function(s).  All
+#      other functions are ignored. Cannot be used with -function together
+#      (yes thats a bug - perl hackers can fix it 8))
+#
+#  c files - list of 'c' files to process
+#
+#  All output goes to stdout, with errors to stderr.
+
+#
+# format of comments.
+# In the following table, (...)? signifies optional structure.
+#                         (...)* signifies 0 or more structure elements
+# /**
+#  * function_name(:)? (- short description)?
+# (* @parameterx: (description of parameter x)?)*
+# (* a blank line)?
+#  * (Description:)? (Description of function)?
+#  * (section header: (section description)? )*
+#  (*)?*/
+#
+# So .. the trivial example would be:
+#
+# /**
+#  * my_function
+#  **/
+#
+# If the Description: header tag is ommitted, then there must be a blank line
+# after the last parameter specification.
+# e.g.
+# /**
+#  * my_function - does my stuff
+#  * @my_arg: its mine damnit
+#  *
+#  * Does my stuff explained. 
+#  */
+#
+#  or, could also use:
+# /**
+#  * my_function - does my stuff
+#  * @my_arg: its mine damnit
+#  * Description: Does my stuff explained. 
+#  */
+# etc.
+#
+# All descriptions can be multiline, apart from the short function description.
+#
+# All descriptive text is further processed, scanning for the following special
+# patterns, which are highlighted appropriately.
+#
+# 'funcname()' - function
+# '$ENVVAR' - environmental variable
+# '&struct_name' - name of a structure
+# '@parameter' - name of a parameter
+# '%CONST' - name of a constant.
+
+# match expressions used to find embedded type information
+$type_constant = "\\\%(\\w+)";
+$type_func = "(\\w+\\(\\))";
+$type_param = "\\\@(\\w+)";
+$type_struct = "\\\&(\\w+)";
+$type_env = "(\\\$\\w+)";
+
+
+# Output conversion substitutions.
+#  One for each output format
+
+# these work fairly well
+%highlights_html = ( $type_constant, "<i>\$1</i>",
+                    $type_func, "<b>\$1</b>",
+                    $type_struct, "<i>\$1</i>",
+                    $type_param, "<tt><b>\$1</b></tt>" );
+$blankline_html = "<p>";
+
+# sgml, docbook format
+%highlights_sgml = ( $type_constant, "<replaceable class=\"option\">\$1</replaceable>",
+                    $type_func, "<function>\$1</function>",
+                    $type_struct, "<structname>\$1</structname>",
+                    $type_env, "<envar>\$1</envar>",
+                    $type_param, "<parameter>\$1</parameter>" );
+$blankline_sgml = "</para><para>\n";
+
+# gnome, docbook format
+%highlights_gnome = ( $type_constant, "<replaceable class=\"option\">\$1</replaceable>",
+                    $type_func, "<function>\$1</function>",
+                    $type_struct, "<structname>\$1</structname>",
+                    $type_env, "<envar>\$1</envar>",
+                    $type_param, "<parameter>\$1</parameter>" );
+$blankline_gnome = "</para><para>\n";
+
+# these are pretty rough
+%highlights_man = ( $type_constant, "\\n.I \\\"\$1\\\"\\n",
+                   $type_func, "\\n.B \\\"\$1\\\"\\n",
+                   $type_struct, "\\n.I \\\"\$1\\\"\\n",
+                   $type_param."([\.\, ]*)\n?", "\\n.I \\\"\$1\$2\\\"\\n" );
+$blankline_man = "";
+
+# text-mode
+%highlights_text = ( $type_constant, "\$1",
+                    $type_func, "\$1",
+                    $type_struct, "\$1",
+                    $type_param, "\$1" );
+$blankline_text = "";
+
+
+sub usage {
+    print "Usage: $0 [ -v ] [ -docbook | -html | -text | -man ]\n";
+    print "         [ -function funcname [ -function funcname ...] ]\n";
+    print "         [ -nofunction funcname [ -nofunction funcname ...] ]\n";
+    print "         c source file(s) > outputfile\n";
+    exit 1;
+}
+
+# read arguments
+if ($#ARGV==-1) {
+    usage();
+}
+
+$verbose = 0;
+$output_mode = "man";
+%highlights = %highlights_man;
+$blankline = $blankline_man;
+$modulename = "API Documentation";
+$function_only = 0;
+while ($ARGV[0] =~ m/^-(.*)/) {
+    $cmd = shift @ARGV;
+    if ($cmd eq "-html") {
+       $output_mode = "html";
+       %highlights = %highlights_html;
+       $blankline = $blankline_html;
+    } elsif ($cmd eq "-man") {
+       $output_mode = "man";
+       %highlights = %highlights_man;
+       $blankline = $blankline_man;
+    } elsif ($cmd eq "-text") {
+       $output_mode = "text";
+       %highlights = %highlights_text;
+       $blankline = $blankline_text;
+    } elsif ($cmd eq "-docbook") {
+       $output_mode = "sgml";
+       %highlights = %highlights_sgml;
+       $blankline = $blankline_sgml;
+    } elsif ($cmd eq "-gnome") {
+       $output_mode = "gnome";
+       %highlights = %highlights_gnome;
+       $blankline = $blankline_gnome;
+    } elsif ($cmd eq "-module") { # not needed for sgml, inherits from calling document
+       $modulename = shift @ARGV;
+    } elsif ($cmd eq "-function") { # to only output specific functions
+       $function_only = 1;
+       $function = shift @ARGV;
+       $function_table{$function} = 1;
+    } elsif ($cmd eq "-nofunction") { # to only output specific functions
+       $function_only = 2;
+       $function = shift @ARGV;
+       $function_table{$function} = 1;
+    } elsif ($cmd eq "-v") {
+       $verbose = 1;
+    } elsif (($cmd eq "-h") || ($cmd eq "--help")) {
+       usage();
+    }
+}
+
+
+# generate a sequence of code that will splice in highlighting information
+# using the s// operator.
+$dohighlight = "";
+foreach $pattern (keys %highlights) {
+#    print "scanning pattern $pattern ($highlights{$pattern})\n";
+    $dohighlight .=  "\$contents =~ s:$pattern:$highlights{$pattern}:gs;\n";
+}
+
+##
+# dumps section contents to arrays/hashes intended for that purpose.
+#
+sub dump_section {
+    my $name = shift @_;
+    my $contents = join "\n", @_;
+
+    if ($name =~ m/$type_constant/) {
+       $name = $1;
+#      print STDERR "constant section '$1' = '$contents'\n";
+       $constants{$name} = $contents;
+    } elsif ($name =~ m/$type_param/) {
+#      print STDERR "parameter def '$1' = '$contents'\n";
+       $name = $1;
+       $parameters{$name} = $contents;
+    } else {
+#      print STDERR "other section '$name' = '$contents'\n";
+       $sections{$name} = $contents;
+       push @sectionlist, $name;
+    }
+}
+
+##
+# output function
+#
+# parameters, a hash.
+#  function => "function name"
+#  parameterlist => @list of parameters
+#  parameters => %parameter descriptions
+#  sectionlist => @list of sections
+#  sections => %descriont descriptions
+#  
+
+sub output_highlight {
+    my $contents = join "\n", @_;
+    my $line;
+
+    eval $dohighlight;
+    foreach $line (split "\n", $contents) {
+       if ($line eq ""){
+           print $lineprefix, $blankline;
+       } else {
+            $line =~ s/\\\\\\/\&/g;
+           print $lineprefix, $line;
+       }
+       print "\n";
+    }
+}
+
+
+# output in html
+sub output_html {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+    my $count;
+    print "<h2>Function</h2>\n";
+
+    print "<i>".$args{'functiontype'}."</i>\n";
+    print "<b>".$args{'function'}."</b>\n";
+    print "(";
+    $count = 0;
+    foreach $parameter (@{$args{'parameterlist'}}) {
+       print "<i>".$args{'parametertypes'}{$parameter}."</i> <b>".$parameter."</b>\n";
+       if ($count != $#{$args{'parameterlist'}}) {
+           $count++;
+           print ", ";
+       }
+    }
+    print ")\n";
+
+    print "<h3>Arguments</h3>\n";
+    print "<dl>\n";
+    foreach $parameter (@{$args{'parameterlist'}}) {
+       print "<dt><i>".$args{'parametertypes'}{$parameter}."</i> <b>".$parameter."</b>\n";
+       print "<dd>";
+       output_highlight($args{'parameters'}{$parameter});
+    }
+    print "</dl>\n";
+    foreach $section (@{$args{'sectionlist'}}) {
+       print "<h3>$section</h3>\n";
+       print "<ul>\n";
+       output_highlight($args{'sections'}{$section});
+       print "</ul>\n";
+    }
+    print "<hr>\n";
+}
+
+
+# output in html
+sub output_intro_html {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+    my $count;
+
+    foreach $section (@{$args{'sectionlist'}}) {
+       print "<h3>$section</h3>\n";
+       print "<ul>\n";
+       output_highlight($args{'sections'}{$section});
+       print "</ul>\n";
+    }
+    print "<hr>\n";
+}
+
+
+
+# output in sgml DocBook
+sub output_sgml {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+    my $count;
+    my $id;
+
+    $id = $args{'module'}."-".$args{'function'};
+    $id =~ s/[^A-Za-z0-9]/-/g;
+
+    print "<refentry>\n";
+    print "<refmeta>\n";
+    print "<refentrytitle><phrase id=\"$id\">".$args{'function'}."</phrase></refentrytitle>\n";
+    print "</refmeta>\n";
+    print "<refnamediv>\n";
+    print " <refname>".$args{'function'}."</refname>\n";
+    print " <refpurpose>\n";
+    print "  ".$args{'purpose'}."\n";
+    print " </refpurpose>\n";
+    print "</refnamediv>\n";
+
+    print "<refsynopsisdiv>\n";
+    print " <title>Synopsis</title>\n";
+    print "  <funcsynopsis>\n";
+    print "   <funcdef>".$args{'functiontype'}." ";
+    print "<function>".$args{'function'}." ";
+    print "</function></funcdef>\n";
+
+#    print "<refsect1>\n";
+#    print " <title>Synopsis</title>\n";
+#    print "  <funcsynopsis>\n";
+#    print "   <funcdef>".$args{'functiontype'}." ";
+#    print "<function>".$args{'function'}." ";
+#    print "</function></funcdef>\n";
+
+    $count = 0;
+    if ($#{$args{'parameterlist'}} >= 0) {
+       foreach $parameter (@{$args{'parameterlist'}}) {
+           print "   <paramdef>".$args{'parametertypes'}{$parameter};
+           print " <parameter>$parameter</parameter></paramdef>\n";
+       }
+    } else {
+       print "  <void>\n";
+    }
+    print "  </funcsynopsis>\n";
+    print "</refsynopsisdiv>\n";
+#    print "</refsect1>\n";
+
+    # print parameters
+    print "<refsect1>\n <title>Arguments</title>\n";
+#    print "<para>\nArguments\n";
+    if ($#{$args{'parameterlist'}} >= 0) {
+       print " <variablelist>\n";
+       foreach $parameter (@{$args{'parameterlist'}}) {
+           print "  <varlistentry>\n   <term><parameter>$parameter</parameter></term>\n";
+           print "   <listitem>\n    <para>\n";
+           $lineprefix="     ";
+           output_highlight($args{'parameters'}{$parameter});
+           print "    </para>\n   </listitem>\n  </varlistentry>\n";
+       }
+       print " </variablelist>\n";
+    } else {
+       print " <para>\n  None\n </para>\n";
+    }
+    print "</refsect1>\n";
+
+    # print out each section
+    $lineprefix="   ";
+    foreach $section (@{$args{'sectionlist'}}) {
+       print "<refsect1>\n <title>$section</title>\n <para>\n";
+#      print "<para>\n$section\n";
+       if ($section =~ m/EXAMPLE/i) {
+           print "<example><para>\n";
+       }
+       output_highlight($args{'sections'}{$section});
+#      print "</para>";
+       if ($section =~ m/EXAMPLE/i) {
+           print "</para></example>\n";
+       }
+       print " </para>\n</refsect1>\n";
+    }
+
+    print "</refentry>\n\n";
+}
+
+# output in sgml DocBook
+sub output_intro_sgml {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+    my $count;
+    my $id;
+
+    $id = $args{'module'};
+    $id =~ s/[^A-Za-z0-9]/-/g;
+
+    # print out each section
+    $lineprefix="   ";
+    foreach $section (@{$args{'sectionlist'}}) {
+       print "<refsect1>\n <title>$section</title>\n <para>\n";
+#      print "<para>\n$section\n";
+       if ($section =~ m/EXAMPLE/i) {
+           print "<example><para>\n";
+       }
+       output_highlight($args{'sections'}{$section});
+#      print "</para>";
+       if ($section =~ m/EXAMPLE/i) {
+           print "</para></example>\n";
+       }
+       print " </para>\n</refsect1>\n";
+    }
+
+    print "\n\n";
+}
+
+# output in sgml DocBook
+sub output_gnome {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+    my $count;
+    my $id;
+
+    $id = $args{'module'}."-".$args{'function'};
+    $id =~ s/[^A-Za-z0-9]/-/g;
+
+    print "<sect2>\n";
+    print " <title id=\"$id\">".$args{'function'}."</title>\n";
+
+#    print "<simplesect>\n";
+#    print " <title>Synopsis</title>\n";
+    print "  <funcsynopsis>\n";
+    print "   <funcdef>".$args{'functiontype'}." ";
+    print "<function>".$args{'function'}." ";
+    print "</function></funcdef>\n";
+
+    $count = 0;
+    if ($#{$args{'parameterlist'}} >= 0) {
+       foreach $parameter (@{$args{'parameterlist'}}) {
+           print "   <paramdef>".$args{'parametertypes'}{$parameter};
+           print " <parameter>$parameter</parameter></paramdef>\n";
+       }
+    } else {
+       print "  <void>\n";
+    }
+    print "  </funcsynopsis>\n";
+#    print "</simplesect>\n";
+#    print "</refsect1>\n";
+
+    # print parameters
+#    print "<simplesect>\n <title>Arguments</title>\n";
+#    if ($#{$args{'parameterlist'}} >= 0) {
+#      print " <variablelist>\n";
+#      foreach $parameter (@{$args{'parameterlist'}}) {
+#          print "  <varlistentry>\n   <term><parameter>$parameter</parameter></term>\n";
+#          print "   <listitem>\n    <para>\n";
+#          $lineprefix="     ";
+#          output_highlight($args{'parameters'}{$parameter});
+#          print "    </para>\n   </listitem>\n  </varlistentry>\n";
+#      }
+#      print " </variablelist>\n";
+#    } else {
+#      print " <para>\n  None\n </para>\n";
+#    }
+#    print "</simplesect>\n";
+
+#    print "<simplesect>\n <title>Arguments</title>\n";
+    if ($#{$args{'parameterlist'}} >= 0) {
+       print " <informaltable pgwide=\"1\" frame=\"none\" role=\"params\">\n";
+       print "<tgroup cols=\"2\">\n";
+       print "<colspec colwidth=\"2*\">\n";
+       print "<colspec colwidth=\"8*\">\n";
+       print "<tbody>\n";
+       foreach $parameter (@{$args{'parameterlist'}}) {
+           print "  <row><entry align=\"right\"><parameter>$parameter</parameter></entry>\n";
+           print "   <entry>\n";
+           $lineprefix="     ";
+           output_highlight($args{'parameters'}{$parameter});
+           print "    </entry></row>\n";
+       }
+       print " </tbody></tgroup></informaltable>\n";
+    } else {
+       print " <para>\n  None\n </para>\n";
+    }
+#    print "</simplesect>\n";
+
+    # print out each section
+    $lineprefix="   ";
+    foreach $section (@{$args{'sectionlist'}}) {
+       print "<simplesect>\n <title>$section</title>\n";
+#      print "<para>\n$section\n";
+       if ($section =~ m/EXAMPLE/i) {
+           print "<example><programlisting>\n";
+       } else {
+       }
+       print "<para>\n";
+       output_highlight($args{'sections'}{$section});
+#      print "</para>";
+       print "</para>\n";
+       if ($section =~ m/EXAMPLE/i) {
+           print "</programlisting></example>\n";
+       } else {
+       }
+       print " </simplesect>\n";
+    }
+
+    print "</sect2>\n\n";
+}
+
+##
+# output in man
+sub output_man {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+    my $count;
+
+    print ".TH \"$args{'module'}\" \"$args{'function'}\" \"25 May 1998\" \"API Manual\" LINUX\n";
+
+    print ".SH Function\n";
+
+    print ".I \"".$args{'functiontype'}."\"\n";
+    print ".B \"".$args{'function'}."\"\n";
+    print "(\n";
+    $count = 0;
+    foreach $parameter (@{$args{'parameterlist'}}) {
+       print ".I \"".$args{'parametertypes'}{$parameter}."\"\n.B \"".$parameter."\"\n";
+       if ($count != $#{$args{'parameterlist'}}) {
+           $count++;
+           print ",\n";
+       }
+    }
+    print ")\n";
+
+    print ".SH Arguments\n";
+    foreach $parameter (@{$args{'parameterlist'}}) {
+       print ".IP \"".$args{'parametertypes'}{$parameter}." ".$parameter."\" 12\n";
+       output_highlight($args{'parameters'}{$parameter});
+    }
+    foreach $section (@{$args{'sectionlist'}}) {
+       print ".SH \"$section\"\n";
+       output_highlight($args{'sections'}{$section});
+    }
+}
+
+sub output_intro_man {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+    my $count;
+
+    print ".TH \"$args{'module'}\" \"$args{'module'}\" \"25 May 1998\" \"API Manual\" LINUX\n";
+
+    foreach $section (@{$args{'sectionlist'}}) {
+       print ".SH \"$section\"\n";
+       output_highlight($args{'sections'}{$section});
+    }
+}
+
+##
+# output in text
+sub output_text {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+
+    print "Function = ".$args{'function'}."\n";
+    print "  return type: ".$args{'functiontype'}."\n\n";
+    foreach $parameter (@{$args{'parameterlist'}}) {
+       print " ".$args{'parametertypes'}{$parameter}." ".$parameter."\n";
+       print "    -> ".$args{'parameters'}{$parameter}."\n";
+    }
+    foreach $section (@{$args{'sectionlist'}}) {
+       print " $section:\n";
+       print "    -> ";
+       output_highlight($args{'sections'}{$section});
+    }
+}
+
+sub output_intro_text {
+    my %args = %{$_[0]};
+    my ($parameter, $section);
+
+    foreach $section (@{$args{'sectionlist'}}) {
+       print " $section:\n";
+       print "    -> ";
+       output_highlight($args{'sections'}{$section});
+    }
+}
+
+##
+# generic output function - calls the right one based
+# on current output mode.
+sub output_function {
+#    output_html(@_);
+    eval "output_".$output_mode."(\@_);";
+}
+
+##
+# generic output function - calls the right one based
+# on current output mode.
+sub output_intro {
+#    output_html(@_);
+    eval "output_intro_".$output_mode."(\@_);";
+}
+
+
+##
+# takes a function prototype and spits out all the details
+# stored in the global arrays/hsahes.
+sub dump_function {
+    my $prototype = shift @_;
+
+    $prototype =~ s/^static+ //;
+    $prototype =~ s/^extern+ //;
+    $prototype =~ s/^inline+ //;
+    $prototype =~ s/^__inline__+ //;
+
+    if ($prototype =~ m/^()([a-zA-Z0-9_~:]+)\s*\(([^\)]*)\)/ ||
+       $prototype =~ m/^(\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\)]*)\)/ ||
+       $prototype =~ m/^(\w+\s*\*)\s*([a-zA-Z0-9_~:]+)\s*\(([^\)]*)\)/ ||
+       $prototype =~ m/^(\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\)]*)\)/ ||
+       $prototype =~ m/^(\w+\s+\w+\s*\*)\s*([a-zA-Z0-9_~:]+)\s*\(([^\)]*)\)/)  {
+       $return_type = $1;
+       $function_name = $2;
+       $args = $3;
+
+#      print STDERR "ARGS = '$args'\n";
+
+       foreach $arg (split ',', $args) {
+           # strip leading/trailing spaces
+           $arg =~ s/^\s*//;
+           $arg =~ s/\s*$//;
+#          print STDERR "SCAN ARG: '$arg'\n";
+           @args = split('\s', $arg);
+
+#          print STDERR " -> @args\n";
+           $param = pop @args;
+#          print STDERR " -> @args\n";
+           if ($param =~ m/^(\*+)(.*)/) {
+               $param = $2;
+               push @args, $1;
+           }
+           $type = join " ", @args;
+
+           if ($type eq "" && $param eq "...")
+           {
+               $type="...";
+               $param="...";
+               $parameters{"..."} = "variable arguments";
+           }
+           if ($type eq "")
+           {
+               $type="";
+               $param="void";
+               $parameters{void} = "no arguments";
+           }
+            if ($parameters{$param} eq "") {
+               $parameters{$param} = "-- undescribed --";
+               print STDERR "Warning($lineno): Function parameter '$param' not described in '$function_name'\n";
+           }
+
+           push @parameterlist, $param;
+           $parametertypes{$param} = $type;
+#          print STDERR "param = '$param', type = '$type'\n";
+       }
+    } else {
+       print STDERR "Error($lineno): cannot understand prototype: '$prototype'\n";
+       return;
+    }
+
+    if ($function_only==0 || 
+     ( $function_only == 1 && defined($function_table{$function_name})) || 
+     ( $function_only == 2 && !defined($function_table{$function_name})))
+    {
+       output_function({'function' => $function_name,
+                        'module' => $modulename,
+                        'functiontype' => $return_type,
+                        'parameterlist' => \@parameterlist,
+                        'parameters' => \%parameters,
+                        'parametertypes' => \%parametertypes,
+                        'sectionlist' => \@sectionlist,
+                        'sections' => \%sections,
+                        'purpose' => $function_purpose
+                        });
+    }
+}
+
+######################################################################
+# main
+# states
+# 0 - normal code
+# 1 - looking for function name
+# 2 - scanning field start.
+# 3 - scanning prototype.
+$state = 0;
+$section = "";
+
+$doc_special = "\@\%\$\&";
+
+$doc_start = "^/\\*\\*\$";
+$doc_end = "\\*/";
+$doc_com = "\\s*\\*\\s*";
+$doc_func = $doc_com."(\\w+):?";
+$doc_sect = $doc_com."([".$doc_special."]?[\\w ]+):(.*)";
+$doc_content = $doc_com."(.*)";
+$doc_block = $doc_com."DOC:\\s*(.*)?";
+
+%constants = ();
+%parameters = ();
+@parameterlist = ();
+%sections = ();
+@sectionlist = ();
+
+$contents = "";
+$section_default = "Description";      # default section
+$section_intro = "Introduction";
+$section = $section_default;
+
+$lineno = 0;
+foreach $file (@ARGV) {
+    if (!open(IN,"<$file")) {
+       print STDERR "Error: Cannot open file $file\n";
+       next;
+    }
+    while (<IN>) {
+       $lineno++;
+
+       if ($state == 0) {
+           if (/$doc_start/o) {
+               $state = 1;             # next line is always the function name
+           }
+       } elsif ($state == 1) { # this line is the function name (always)
+           if (/$doc_block/o) {
+               $state = 4;
+               $contents = "";
+               if ( $1 eq "" ) {
+                       $section = $section_intro;
+               } else {
+                       $section = $1;
+               }
+            }
+           elsif (/$doc_func/o) {
+               $function = $1;
+               $state = 2;
+               if (/-(.*)/) {
+                   $function_purpose = $1;
+               } else {
+                   $function_purpose = "";
+               }
+               if ($verbose) {
+                   print STDERR "Info($lineno): Scanning doc for $function\n";
+               }
+           } else {
+               print STDERR "WARN($lineno): Cannot understand $_ on line $lineno",
+               " - I thought it was a doc line\n";
+               $state = 0;
+           }
+       } elsif ($state == 2) { # look for head: lines, and include content
+           if (/$doc_sect/o) {
+               $newsection = $1;
+               $newcontents = $2;
+
+               if ($contents ne "") {
+                   $contents =~ s/\&/\\\\\\amp;/g;
+                   $contents =~ s/\</\\\\\\lt;/g;
+                   $contents =~ s/\>/\\\\\\gt;/g;
+                   dump_section($section, $contents);
+                   $section = $section_default;
+               }
+
+               $contents = $newcontents;
+               if ($contents ne "") {
+                   $contents .= "\n";
+               }
+               $section = $newsection;
+           } elsif (/$doc_end/) {
+
+               if ($contents ne "") {
+                   $contents =~ s/\&/\\\\\\amp;/g;
+                   $contents =~ s/\</\\\\\\lt;/g;
+                   $contents =~ s/\>/\\\\\\gt;/g;
+                   dump_section($section, $contents);
+                   $section = $section_default;
+                   $contents = "";
+               }
+
+#          print STDERR "end of doc comment, looking for prototype\n";
+               $prototype = "";
+               $state = 3;
+           } elsif (/$doc_content/) {
+               # miguel-style comment kludge, look for blank lines after
+               # @parameter line to signify start of description
+               if ($1 eq "" && $section =~ m/^@/) {
+                   $contents =~ s/\&/\\\\\\amp;/g;
+                   $contents =~ s/\</\\\\\\lt;/g;
+                   $contents =~ s/\>/\\\\\\gt;/g;
+                   dump_section($section, $contents);
+                   $section = $section_default;
+                   $contents = "";
+               } else {
+                   $contents .= $1."\n";
+               }
+           } else {
+               # i dont know - bad line?  ignore.
+               print STDERR "WARNING($lineno): bad line: $_"; 
+           }
+       } elsif ($state == 3) { # scanning for function { (end of prototype)
+           if (m#\s*/\*\s+MACDOC\s*#io) {
+             # do nothing
+           }
+           elsif (/([^\{]*)/) {
+               $prototype .= $1;
+           }
+           if (/\{/) {
+               $prototype =~ s@/\*.*?\*/@@gos; # strip comments.
+               $prototype =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
+               $prototype =~ s@^ +@@gos; # strip leading spaces
+               dump_function($prototype);
+
+               $function = "";
+               %constants = ();
+               %parameters = ();
+               %parametertypes = ();
+               @parameterlist = ();
+               %sections = ();
+               @sectionlist = ();
+               $prototype = "";
+
+               $state = 0;
+           }
+       } elsif ($state == 4) {
+               # Documentation block
+               if (/$doc_block/) {
+                       dump_section($section, $contents);
+                       output_intro({'sectionlist' => \@sectionlist,
+                                     'sections' => \%sections });
+                       $contents = "";
+                       $function = "";
+                       %constants = ();
+                       %parameters = ();
+                       %parametertypes = ();
+                       @parameterlist = ();
+                       %sections = ();
+                       @sectionlist = ();
+                       $prototype = "";
+                       if ( $1 eq "" ) {
+                               $section = $section_intro;
+                       } else {
+                               $section = $1;
+                       }
+                }
+               elsif (/$doc_end/)
+               {
+                       dump_section($section, $contents);
+                       output_intro({'sectionlist' => \@sectionlist,
+                                     'sections' => \%sections });
+                       $contents = "";
+                       $function = "";
+                       %constants = ();
+                       %parameters = ();
+                       %parametertypes = ();
+                       @parameterlist = ();
+                       %sections = ();
+                       @sectionlist = ();
+                       $prototype = "";
+                       $state = 0;
+               }
+               elsif (/$doc_content/)
+               {
+                       if ( $1 eq "" )
+                       {
+                               $contents .= $blankline;
+                       }
+                       else
+                       {
+                               $contents .= $1 . "\n";
+                       }       
+               }
+          }
+    }
+}
+