File: gtkdoc-mkdb.in

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gtk-doc 1.3-4
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#!@PERL@ -w
# -*- cperl -*-
#
# gtk-doc - GTK DocBook documentation generator.
# Copyright (C) 1998  Damon Chaplin
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

#############################################################################
# Script      : gtkdoc-mkdb
# Description : This creates the DocBook files from the edited templates.
#
#		NOTE: When creating SGML IDS, we append ":CAPS" to all
#               all-caps identifiers to prevent name clashes. (It basically
#               never is the case that mixed-case identifiers would collide.)
#		See the CreateValidSGMLID function.
#############################################################################

use strict;
use Getopt::Long;

unshift @INC, '@PACKAGE_DATA_DIR@';
require "gtkdoc-common.pl";

# Options

# name of documentation module
my $MODULE;
my $TMPL_DIR;
my $SGML_OUTPUT_DIR;
my @SOURCE_DIRS;
my $IGNORE_FILES = "";
my $PRINT_VERSION;
my $PRINT_HELP;
my $OUTPUT_ALL_SYMBOLS;
my $MAIN_SGML_FILE;
my $SGML_MODE;
my $OUTPUT_FORMAT;

my %optctl = (module => \$MODULE,
	      'source-dir' => \@SOURCE_DIRS,
	      'ignore-files' => \$IGNORE_FILES,
	      'output-dir' => \$SGML_OUTPUT_DIR,
	      'tmpl-dir' => \$TMPL_DIR,
	      'version' => \$PRINT_VERSION,
	      'help' => \$PRINT_HELP,
	      'main-sgml-file' => \$MAIN_SGML_FILE,
	      'outputallsymbols' => \$OUTPUT_ALL_SYMBOLS,
	      'sgml-mode' => \$SGML_MODE,
	      'output-format' => \$OUTPUT_FORMAT);
GetOptions(\%optctl, "module=s", "source-dir:s", "ignore-files:s", "output-dir:s", "tmpl-dir:s", "version", "outputallsymbols", "main-sgml-file:s", "help", "sgml-mode", "output-format:s");

if ($PRINT_VERSION) {
    print "@VERSION@\n";
    exit 0;
}

if (!$MODULE) {
    $PRINT_HELP = 1;
}

if ($PRINT_HELP) {
    print "gtkdoc-mkdb version @VERSION@\n";
    print "\n--module=MODULE_NAME   Name of the doc module being parsed";
    print "\n--source-dir=DIRNAME   Directories which contain inline reference material";
    print "\n--ignore-files=FILES   Files or directories which should not be scanned";
    print "\n                       May be used more than once for multiple directories";
    print "\n--output-dir=DIRNAME   Directory to put the generated Docbook files in";
    print "\n--tmpl-dir=DIRNAME     Directory in which template files may be found";
    print "\n--main-sgml-file=FILE  File containing the toplevel SGML file.";
    print "\n--output-format=FORMAT The format to use for the generated docbook, XML or SGML.";
    print "\n--sgml-mode            Allow Docbook markup in inline documentation.";
    print "\n--version              Print the version of this program";
    print "\n--help                 Print this help\n";
    exit 0;
}

if (!$MAIN_SGML_FILE) {
    $MAIN_SGML_FILE="${MODULE}-docs.sgml";
}

my ($empty_element_end, $doctype_header);

if (lc($OUTPUT_FORMAT) eq "xml") {
    $OUTPUT_FORMAT = "xml";
    $empty_element_end = "/>";

    if ($MAIN_SGML_FILE && -e $MAIN_SGML_FILE) {
        open(INPUT, "<$MAIN_SGML_FILE") || die "Can't open $MAIN_SGML_FILE";
	$doctype_header = "";
	while (<INPUT>) {
	    if (/^\s*<(book|chapter|article)/) {
		if ($_ !~ m/http:\/\/www.w3.org\/200[13]\/XInclude/) {
		    $doctype_header = "";
		}
	        last;
	    }
	    $doctype_header .= $_;
	}
	close(INPUT);
    } else {
        $doctype_header =
"<?xml version=\"1.0\"?>\n" .
"<!DOCTYPE book PUBLIC \"-//OASIS//DTD DocBook XML V4.1.2//EN\"\n" .
"               \"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd\">\n";
    }
    $doctype_header =~ s/<!DOCTYPE \w+/<!DOCTYPE refentry/;
  } else {
    $OUTPUT_FORMAT = "sgml";
    $doctype_header = "";
    $empty_element_end = ">";
}

my $ROOT_DIR = ".";

# All the files are written in subdirectories beneath here.
$TMPL_DIR = $TMPL_DIR ? $TMPL_DIR : "$ROOT_DIR/tmpl";

# This is where we put all the DocBook output.
$SGML_OUTPUT_DIR = $SGML_OUTPUT_DIR ? $SGML_OUTPUT_DIR : "$ROOT_DIR/$OUTPUT_FORMAT";

# This file contains the object hierarchy.
my $OBJECT_TREE_FILE = "$ROOT_DIR/$MODULE.hierarchy";

# This file contains the interfaces.
my $INTERFACES_FILE = "$ROOT_DIR/$MODULE.interfaces";

# This file contains the prerequisites.
my $PREREQUISITES_FILE = "$ROOT_DIR/$MODULE.prerequisites";

# This file contains signal arguments and names.
my $SIGNALS_FILE = "$ROOT_DIR/$MODULE.signals";

# The file containing Arg information.
my $ARGS_FILE = "$ROOT_DIR/$MODULE.args";

# These global arrays store information on signals. Each signal has an entry
# in each of these arrays at the same index, like a multi-dimensional array.
my @SignalObjects;	# The GtkObject which emits the signal.
my @SignalNames;	# The signal name.
my @SignalReturns;	# The return type.
my @SignalPrototypes;	# The rest of the prototype of the signal handler.

# These global arrays store information on Args. Each Arg has an entry
# in each of these arrays at the same index, like a multi-dimensional array.
my @ArgObjects;		# The GtkObject which has the Arg.
my @ArgNames;		# The Arg name.
my @ArgTypes;		# The Arg type - gint, GtkArrowType etc.
my @ArgFlags;		# How the Arg can be used - readable/writable etc.
my @ArgNicks;		# The nickname of the Arg.
my @ArgBlurbs;          # Docstring of the Arg.
my @ArgDefaults;        # Default value of the Arg.
my @ArgRanges;		# The range of the Arg type
# These global hashes store declaration info keyed on a symbol name.
my %Declarations;
my %DeclarationTypes;
my %DeclarationConditional;
my %DeclarationOutput;
my %Deprecated;
my %Since;
my %StructHasTypedef;

# These global hashes store the existing documentation.
my %SymbolDocs;
my %SymbolTypes;
my %SymbolParams;

# These global hashes store documentation scanned from the source files.
my %SourceSymbolDocs;
my %SourceSymbolParams;

# all documentation goes in here, so we can do coverage analysis
my %AllSymbols;
my %AllDocumentedSymbols;

# These global arrays store GtkObject and subclasses and the hierarchy.
my @Objects;
my @ObjectLevels;

my %Interfaces;
my %Prerequisites;

# holds the symbols which are mentioned in $MODULE-sections.txt
my %KnownSymbols;

# Create the root DocBook output directory if it doens't exist.
if (! -e $SGML_OUTPUT_DIR) {
    mkdir ("$SGML_OUTPUT_DIR", 0777)
	|| die "Can't create directory: $SGML_OUTPUT_DIR";
}

# Function and other declaration output settings.
my $RETURN_TYPE_FIELD_WIDTH = 12;
my $SYMBOL_FIELD_WIDTH = 32;
my $SIGNAL_FIELD_WIDTH = 12;

&ReadKnownSymbols ("$ROOT_DIR/$MODULE-sections.txt");
&ReadSignalsFile ($SIGNALS_FILE);
&ReadArgsFile ($ARGS_FILE);
&ReadObjectHierarchy;
&ReadInterfaces;
&ReadPrerequisites;

&ReadDeclarationsFile ("$ROOT_DIR/$MODULE-decl.txt", 0);
if (-f "$ROOT_DIR/$MODULE-overrides.txt") {
    &ReadDeclarationsFile ("$ROOT_DIR/$MODULE-overrides.txt", 1);
}

for my $dir (@SOURCE_DIRS) {
    &ReadSourceDocumentation ($dir);
}

my $changed = &OutputSGML ("$ROOT_DIR/$MODULE-sections.txt");

# If any of the DocBook SGML files have changed, update the timestamp file (so
# it can be used for Makefile dependencies).
if ($changed || ! -e "$ROOT_DIR/sgml.stamp") {
    open (TIMESTAMP, ">$ROOT_DIR/sgml.stamp")
	|| die "Can't create $ROOT_DIR/sgml.stamp";
    print (TIMESTAMP "timestamp");
    close (TIMESTAMP);
}

#############################################################################
# Function    : OutputObjectList
# Description : This outputs the alphabetical list of objects, in a columned
#		table. FIXME: Currently this also outputs ancestor objects
#		which may not actually be in this module.
# Arguments   : none
#############################################################################

sub OutputObjectList {
    my $cols = 3;
    my $old_object_index = "$SGML_OUTPUT_DIR/object_index.sgml";
    my $new_object_index = "$SGML_OUTPUT_DIR/object_index.new";

    open (OUTPUT, ">$new_object_index")
	|| die "Can't create $new_object_index";
    print (OUTPUT <<EOF);
<informaltable pgwide="1" frame="none">
<tgroup cols="$cols">
<colspec colwidth="1*"${empty_element_end}
<colspec colwidth="1*"${empty_element_end}
<colspec colwidth="1*"${empty_element_end}
<tbody>
EOF

    my $count = 0;
    my $object;
    foreach $object (sort(@Objects)) {
	my $xref = &MakeXRef ($object);
	if ($count % $cols == 0) { print (OUTPUT "<row>\n"); }
	print (OUTPUT "<entry>$xref</entry>\n");
	if ($count % $cols == ($cols - 1)) { print (OUTPUT "</row>\n"); }
	$count++;
    }
    if ($count == 0) {
        # emit an empty row, since empty tables are invalid
	print (OUTPUT "<row><entry> </entry></row>\n");
    }

    print (OUTPUT <<EOF);
</tbody></tgroup></informaltable>
EOF
    close (OUTPUT);

    &UpdateFileIfChanged ($old_object_index, $new_object_index, 0);
}


#############################################################################
# Function    : OutputSGML
# Description : This collects the output for each section of the docs, and
#		outputs each file when the end of the section is found.
# Arguments   : $file - the $MODULE-sections.txt file which contains all of
#		the functions/macros/structs etc. being documented, organised
#		into sections and subsections.
#############################################################################

sub OutputSGML {
    my ($file) = @_;
    
#    print "Reading: $file\n";
    open (INPUT, $file)
	|| die "Can't open $file";
    my $book_top = "";
    my $book_bottom = "";
    my $includes = "";
    my $section_includes = "";
    my $in_section = 0;
    my $title = "";
    my $subsection = "";
    my $synopsis;
    my $details;
    my $num_symbols;
    my $changed = 0;
    my $signals_synop = "";
    my $signals_desc = "";
    my $args_synop = "";
    my $child_args_synop = "";
    my $style_args_synop = "";
    my $args_desc = "";
    my $child_args_desc = "";
    my $style_args_desc = "";
    my $hierarchy = "";
    my $interfaces = "";
    my $implementations = "";
    my $prerequisites = "";
    my $derived = "";
    my @file_objects = ();

    while (<INPUT>) {
	if (m/^#/) {
	    next;

	} elsif (m/^<SECTION>/) {
	    $synopsis = "";
	    $details = "";
	    $num_symbols = 0;
	    $in_section = 1;
	    @file_objects = ();

	} elsif (m/^<SUBSECTION\s*(.*)>/i) {
	    $synopsis .= "\n";
	    $subsection = $1;

	} elsif (m/^<SUBSECTION>/) {

	} elsif (m/^<TITLE>(.*)<\/TITLE>/) {
	    $title = $1;
#	    print "Section: $title\n";

	    # We don't want warnings if object & class structs aren't used.
	    $DeclarationOutput{$title} = 1;
	    $DeclarationOutput{"${title}Class"} = 1;

	} elsif (m/^<FILE>(.*)<\/FILE>/) {
            my $sym;

	    $file = $1;
	    %SymbolDocs = ();
	    %SymbolTypes = ();
	    %SymbolParams = ();
	    &ReadTemplateFile ("$TMPL_DIR/$file", 1);
	    &MergeSourceDocumentation;

	} elsif (m/^<INCLUDE>(.*)<\/INCLUDE>/) {
	    if ($in_section) {
		$section_includes = $1;
	    } else {
		$includes = $1;
	    }

	} elsif (m/^<\/SECTION>/) {
	    if ($title eq "") {
		$title = $file;
	    }
#	    print "End of section: $title\n";

	    $file =~ s/\s/_/g;

	    # GtkObjects use their class name as the ID.
	    my $section_id;
	    if (&CheckIsObject ($title)) {
		$section_id = &CreateValidSGMLID ($title);
	    } else {
		$section_id = &CreateValidSGMLID ("$MODULE-$title");
	    }
	    
	    if ($num_symbols > 0) {
		if (lc($OUTPUT_FORMAT) eq "xml") {
		    $book_bottom .= "    <xi:include href=\"xml/$file.xml\"/>\n";
		} else {
		    $book_top.="<!ENTITY $section_id SYSTEM \"sgml/$file.sgml\">\n";
		    $book_bottom .= "    &$section_id;\n";
		}

		if ($section_includes eq "") {
		    $section_includes = $includes;
		}

		if ($signals_synop ne '') {
		    $signals_synop = <<EOF;
<refsect1>
<title>Signal Prototypes</title>
<synopsis>

${signals_synop}</synopsis>
</refsect1>
EOF
		    $signals_desc  = <<EOF;
<refsect1>
<title>Signals</title>
$signals_desc
</refsect1>
EOF
		}

		if ($args_synop ne '') {
		    $args_synop = <<EOF;
<refsect1>
<title>Properties</title>
<synopsis>

${args_synop}</synopsis>
</refsect1>
EOF
		    $args_desc  = <<EOF;
<refsect1>
<title>Properties</title>
$args_desc
</refsect1>
EOF
		}

		if ($child_args_synop ne '') {
		    $args_synop .= <<EOF;
<refsect1>
<title>Child Properties</title>
<synopsis>

${child_args_synop}</synopsis>
</refsect1>
EOF
		    $args_desc .= <<EOF;
<refsect1>
<title>Child Properties</title>
$child_args_desc
</refsect1>
EOF
		}

		if ($style_args_synop ne '') {
		    $args_synop .= <<EOF;
<refsect1>
<title>Style Properties</title>
<synopsis>

${style_args_synop}</synopsis>
</refsect1>
EOF
		    $args_desc .= <<EOF;
<refsect1>
<title>Style Properties</title>
$style_args_desc
</refsect1>
EOF
		}

		if ($hierarchy ne "") {
		    $hierarchy = <<EOF;
<refsect1>
<title>Object Hierarchy</title>
$hierarchy
</refsect1>
EOF
		}

		if ($interfaces ne "") {
		    $interfaces = <<EOF;
<refsect1>
<title>Implemented Interfaces</title>
$interfaces
</refsect1>
EOF
		}

		if ($implementations ne "") {
		    $implementations = <<EOF;
<refsect1>
<title>Known Implementations</title>
$implementations
</refsect1>
EOF
		}

		if ($prerequisites ne "") {
		    $prerequisites = <<EOF;
<refsect1>
<title>Prerequisites</title>
$prerequisites
</refsect1>
EOF
		}

		if ($derived ne "") {
		    $derived = <<EOF;
<refsect1>
<title>Known Derived Interfaces</title>
$derived
</refsect1>
EOF
		}

		my $file_changed = &OutputSGMLFile ($file, $title, $section_id,
						    $section_includes,
						    \$synopsis, \$details,
						    \$signals_synop, \$signals_desc,
						    \$args_synop, \$args_desc,
						    \$hierarchy, \$interfaces,
						    \$implementations,
						    \$prerequisites, \$derived,
						    \@file_objects);
		if ($file_changed) {
		    $changed = 1;
		}
	    }
	    $title = "";
	    $subsection = "";
	    $in_section = 0;
	    $section_includes = "";
	    $signals_synop = "";
	    $signals_desc = "";
	    $args_synop = "";
	    $child_args_synop = "";
	    $style_args_synop = "";
	    $args_desc = "";
	    $child_args_desc = "";
	    $style_args_desc = "";
	    $hierarchy = "";
 	    $interfaces = "";
 	    $implementations = "";
	    $prerequisites = "";
	    $derived = "";

	} elsif (m/^(\S+)/) {
	    my $symbol = $1;
#	    print "  Symbol: $symbol\n";

	    my $declaration = $Declarations{$symbol};
	    if (defined ($declaration)) {
		# We don't want standard macros/functions of GtkObjects,
		# or private declarations.
		if ($subsection ne "Standard" && $subsection ne "Private") {
		    if (&CheckIsObject ($symbol)) {
			push @file_objects, $symbol;
		    }
		    my ($synop, $desc) = &OutputDeclaration ($symbol,
							     $declaration);
		    my ($sig_synop, $sig_desc) = &GetSignals ($symbol);
		    my ($arg_synop, $child_arg_synop, $style_arg_synop,
			$arg_desc, $child_arg_desc, $style_arg_desc) = &GetArgs ($symbol);
		    my $hier = &GetHierarchy ($symbol);
		    my $ifaces = &GetInterfaces ($symbol);
		    my $impls = &GetImplementations ($symbol);
		    my $prereqs = &GetPrerequisites ($symbol);
		    my $der = &GetDerived ($symbol);
		    $synopsis .= $synop;
		    $details .= $desc;
		    $signals_synop .= $sig_synop;
		    $signals_desc .= $sig_desc;
		    $args_synop .= $arg_synop;
		    $child_args_synop .= $child_arg_synop;
		    $style_args_synop .= $style_arg_synop;
		    $args_desc .= $arg_desc;
		    $child_args_desc .= $child_arg_desc;
		    $style_args_desc .= $style_arg_desc;
		    $hierarchy .= $hier;
		    $interfaces .= $ifaces;
		    $implementations .= $impls;
		    $prerequisites .= $prereqs;
		    $derived .= $der;
		}

		# Note that the declaration has been output.
		$DeclarationOutput{$symbol} = 1;
	    } elsif ($subsection ne "Standard" && $subsection ne "Private") {
		print "WARNING: No declaration found for: $1\n";
	    }
	    $num_symbols++;
	}
    }
    close (INPUT);

    &OutputMissingDocumentation;

    if ($OUTPUT_ALL_SYMBOLS) {
	&OutputAllSymbols;
    }

    &OutputBook ($book_top, $book_bottom);

    return $changed;
}


#############################################################################
# Function    : ReadKnownSymbols
# Description : This collects the names of non-private symbols from the
#               $MODULE-sections.txt file.
# Arguments   : $file - the $MODULE-sections.txt file which contains all of
#		the functions/macros/structs etc. being documented, organised
#		into sections and subsections.
#############################################################################

sub ReadKnownSymbols {
    my ($file) = @_;

    my $subsection = "";
 
#    print "Reading: $file\n";
    open (INPUT, $file)
	|| die "Can't open $file";

    while (<INPUT>) {
	if (m/^#/) {
	    next;

	} elsif (m/^<SECTION>/) {
	    $subsection = "";

	} elsif (m/^<SUBSECTION\s*(.*)>/i) {
	    $subsection = $1;

	} elsif (m/^<SUBSECTION>/) {
	    next;

	} elsif (m/^<TITLE>(.*)<\/TITLE>/) {
            next;

	} elsif (m/^<FILE>(.*)<\/FILE>/) {
            next;

	} elsif (m/^<INCLUDE>(.*)<\/INCLUDE>/) {
            next;

	} elsif (m/^<\/SECTION>/) {
            next;

	} elsif (m/^(\S+)/) {
	    my $symbol = $1;

	    if ($subsection ne "Standard" && $subsection ne "Private") {
	        $KnownSymbols{$symbol} = 1;
	    }
	    else {
	        $KnownSymbols{$symbol} = 0;
	    }
	}
    }
    close (INPUT);
}


#############################################################################
# Function    : OutputDeclaration
# Description : Returns the synopsis and detailed description DocBook
#		describing one function/macro etc.
# Arguments   : $symbol - the name of the function/macro begin described.
#		$declaration - the declaration of the function/macro.
#############################################################################

sub OutputDeclaration {
    my ($symbol, $declaration) = @_;

    my $type = $DeclarationTypes {$symbol};
    if ($type eq 'MACRO') {
	return &OutputMacro ($symbol, $declaration);
    } elsif ($type eq 'TYPEDEF') {
	return &OutputTypedef ($symbol, $declaration);
    } elsif ($type eq 'STRUCT') {
	return &OutputStruct ($symbol, $declaration);
    } elsif ($type eq 'ENUM') {
	return &OutputEnum ($symbol, $declaration);
    } elsif ($type eq 'UNION') {
	return &OutputUnion ($symbol, $declaration);
    } elsif ($type eq 'VARIABLE') {
	return &OutputVariable ($symbol, $declaration);

    } elsif ($type eq 'FUNCTION') {
	return &OutputFunction ($symbol, $declaration, $type);
    } elsif ($type eq 'USER_FUNCTION') {
	return &OutputFunction ($symbol, $declaration, $type);
    } else {
	die "Unknown symbol type";
    }
}


#############################################################################
# Function    : OutputMacro
# Description : Returns the synopsis and detailed description of a macro.
# Arguments   : $symbol - the macro.
#		$declaration - the declaration of the macro.
#############################################################################

sub OutputMacro {
    my ($symbol, $declaration) = @_;
    my $id = &CreateValidSGMLID ($symbol);
    my $synop = "#define     <link linkend=\"$id\">$symbol</link>";
    my $desc;
    my $args = "";
    if ($declaration =~ m/^\s*#\s*define\s+\w+(\([^\)]*\))/) {
	$args = $1;

	if (length ($symbol) < $SYMBOL_FIELD_WIDTH) {
	    $synop .= (' ' x ($SYMBOL_FIELD_WIDTH - length ($symbol)));
	}

	$synop .= &CreateValidSGML ($args);
    }
    $synop .= "\n";

    if ($args ne "") {
	$desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}${symbol}()</title>\n";
    } else {
	$desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}$symbol</title>\n";
    }
    $desc .= MakeIndexterms($symbol);

    # Don't output the macro definition if is is a conditional macro or it
    # looks like a function, i.e. starts with "g_" or "_?gnome_", or it is
    # longer than 2 lines, otherwise we get lots of complicated macros like
    # g_assert.
    if (!defined ($DeclarationConditional{$symbol}) && ($symbol !~ m/^g_/)
	&& ($symbol !~ m/^_?gnome_/) && (($declaration =~ tr/\n//) < 2)) {
	$declaration = &CreateValidSGML ($declaration);
	$desc .= "<programlisting>$declaration</programlisting>\n";
    } else {
	$desc .= "<programlisting>#define     $symbol";
	$desc .= &CreateValidSGML ($args);
	$desc .= "</programlisting>\n";
    }

    $desc .= &MakeDeprecationNote($symbol);

    my $parameters = &OutputParamDescriptions ("MACRO", $symbol);
    my $parameters_output = 0;

    if (defined ($SymbolDocs{$symbol})) {
	my $symbol_docs = &ExpandAbbreviations($SymbolDocs{$symbol});

	# Try to insert the parameter table at the author's desired position.
	# Otherwise we need to tag it onto the end.
	if ($symbol_docs =~ s/<!--PARAMETERS-->/$parameters/) {
	  $parameters_output = 1;
	}
	$desc .= $symbol_docs;
    }

    if ($parameters_output == 0) {
	$desc .= $parameters;
    }

    if (exists $Since{$symbol}) {
	$desc .= "<para>Since $Since{$symbol}</para>";
    }
    $desc .= "</refsect2>\n";
    return ($synop, $desc);
}


#############################################################################
# Function    : OutputTypedef
# Description : Returns the synopsis and detailed description of a typedef.
# Arguments   : $symbol - the typedef.
#		$declaration - the declaration of the typedef,
#		  e.g. 'typedef unsigned int guint;'
#############################################################################

sub OutputTypedef {
    my ($symbol, $declaration) = @_;
    my $id = &CreateValidSGMLID ($symbol);
    my $synop = "typedef     <link linkend=\"$id\">$symbol</link>;\n";
    my $desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}$symbol</title>\n";

    $desc .= MakeIndexterms($symbol);

    if (!defined ($DeclarationConditional{$symbol})) {
	$declaration = &CreateValidSGML ($declaration);
	$desc .= "<programlisting>$declaration</programlisting>\n";
    }

    $desc .= &MakeDeprecationNote($symbol);

    if (defined ($SymbolDocs{$symbol})) {
	$desc .= &ExpandAbbreviations($SymbolDocs{$symbol});
    }
    if (exists $Since{$symbol}) {
	$desc .= "<para>Since $Since{$symbol}</para>";
    }
    $desc .= "</refsect2>\n";
    return ($synop, $desc);
}


#############################################################################
# Function    : OutputStruct
# Description : Returns the synopsis and detailed description of a struct.
#		We check if it is a widget struct, and if so we only output
#		parts of it that are noted as public fields.
#		We also use a different SGML ID for widget structs, since the
#		original ID is used for the entire RefEntry.
# Arguments   : $symbol - the struct.
#		$declaration - the declaration of the struct.
#############################################################################

sub OutputStruct {
    my ($symbol, $declaration) = @_;

    my $is_widget_struct = 0;
    my $default_to_public = 1;
    if (&CheckIsObject ($symbol)) {
#	print "Found widget struct: $symbol\n";
	$is_widget_struct = 1;
	$default_to_public = 0;
    }

    my $id;
    if ($is_widget_struct) {
	$id = &CreateValidSGMLID ($symbol . "_struct");
    } else {
	$id = &CreateValidSGMLID ($symbol);
    }

    # Determine if it is a simple struct or it also has a typedef.
    my $has_typedef = 0;
    if ($StructHasTypedef{$symbol} || $declaration =~ m/^\s*typedef\s+/) {
      $has_typedef = 1;
    }

    my $synop;
    my $desc;
    if ($has_typedef) {
        # For structs with typedefs we just output the struct name.
        $synop = "            <link linkend=\"$id\">$symbol</link>;\n";
	$desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}$symbol</title>\n";
    } else {
        $synop = "struct      <link linkend=\"$id\">$symbol</link>;\n";
	$desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}struct $symbol</title>\n";
    }

    $desc .= MakeIndexterms($symbol);

    # Form a pretty-printed, private-data-removed form of the declaration

    my $decl_out = "";
    if ($declaration =~ m/^\s*$/) {
#	print "Found opaque struct: $symbol\n";
	$decl_out = "typedef struct _$symbol $symbol;";
    } elsif ($declaration =~ m/^\s*struct\s+\w+\s*;\s*$/) {
#	print "Found opaque struct: $symbol\n";
	$decl_out = "struct $symbol;";
    } else {
	my $public = $default_to_public;
	my $new_declaration = "";
	my $decl_line;
	my $decl = $declaration;

	if ($decl =~ m/^\s*(typedef\s+)?struct\s*\w*\s*{(.*)}\s*\w*\s*;\s*$/s) {
	    my $struct_contents = $2;

	    foreach $decl_line (split (/\n/, $struct_contents)) {
#	        print "Struct line: $decl_line\n";
	        if ($decl_line =~ m%/\*\s*<\s*public\s*>\s*\*/%) {
		    $public = 1;
		} elsif ($decl_line =~ m%/\*\s*<\s*(private|protected)\s*>\s*\*/%) {
		    $public = 0;
		} elsif ($public) {
		    $new_declaration .= $decl_line . "\n";
		}
	    }

	    if ($new_declaration) {
	        # Strip any blank lines off the ends.
	        $new_declaration =~ s/^\s*\n//;
	        $new_declaration =~ s/\n\s*$/\n/;

	        if ($has_typedef) {
		    $decl_out = "typedef struct {\n" . $new_declaration
		      . "} $symbol;\n";
		} else {
		    $decl_out = "struct $symbol {\n" . $new_declaration
		      . "};\n";
		}
	    }
	} else {
	    print "WARNING: Couldn't parse struct:\n$declaration\n";
	}

	# If we couldn't parse the struct or it was all private, output an
	# empty struct declaration.
	if ($decl_out eq "") {
	    if ($has_typedef) {
		$decl_out = "typedef struct _$symbol $symbol;";
	    } else {
		$decl_out = "struct $symbol;";
	    }
	}
    }

    $decl_out = &CreateValidSGML ($decl_out);
    $desc .= "<programlisting>$decl_out</programlisting>\n";

    $desc .= &MakeDeprecationNote($symbol);

    if (defined ($SymbolDocs{$symbol})) {
	$desc .= &ExpandAbbreviations($SymbolDocs{$symbol});
    }

    # Create a table of fields and descriptions

    # FIXME: Inserting &nbsp's into the produced type declarations here would
    #        improve the output in most situations ... except for function
    #        members of structs!
    my @fields = ParseStructDeclaration($declaration, !$default_to_public,
					0, \&MakeXRef,
					sub {
					    "<structfield>$_[0]</structfield>";
					});
    my $params = $SymbolParams{$symbol};

    # If no parameters are filled in, we don't generate the description
    # table, for backwards compatibility 

    my $found = 0;
    if (defined $params) {
	for (my $i = 1; $i <= $#$params; $i += 2) {
	    if ($params->[$i] =~ /\S/) {
		$found = 1;
		last;
	    }
	}
    }
    
    if ($found) {
	my %field_descrs = @$params;
	
	    $desc .= <<EOF;
<variablelist role="struct">
EOF
	while (@fields) {
	    my $field_name = shift @fields;
	    my $text = shift @fields;
	    my $field_descr = $field_descrs{$field_name};

	    $desc .= "<varlistentry>\n<term>$text</term>\n";
	    if (defined $field_descr) {
		$desc .= "<listitem><simpara>".&ExpandAbbreviations($field_descr)."</simpara></listitem>\n";
	    } else {
		$desc .= "<listitem></listitem>\n";
	    }
            $desc .= "</varlistentry>\n";
	}
    
	$desc .= "</variablelist>";
    }
    if (exists $Since{$symbol}) {
	$desc .= "<para>Since $Since{$symbol}</para>";
    }
    $desc .= "</refsect2>\n";
    return ($synop, $desc);
}


#############################################################################
# Function    : OutputEnum
# Description : Returns the synopsis and detailed description of a enum.
# Arguments   : $symbol - the enum.
#		$declaration - the declaration of the enum.
#############################################################################

sub OutputEnum {
    my ($symbol, $declaration) = @_;
    my $id = &CreateValidSGMLID ($symbol);
    my $synop = "enum        <link linkend=\"$id\">$symbol</link>;\n";
    my $desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}enum $symbol</title>\n";

    $desc .= MakeIndexterms($symbol);

    $declaration = &CreateValidSGML ($declaration);
    $desc .= "<programlisting>$declaration</programlisting>\n";

    $desc .= &MakeDeprecationNote($symbol);

    if (defined ($SymbolDocs{$symbol})) {
	$desc .= &ExpandAbbreviations($SymbolDocs{$symbol});
    }

    # Create a table of fields and descriptions

    my @members = ParseEnumDeclaration($declaration);
    my $params = $SymbolParams{$symbol};

    # If no parameters are filled in, we don't generate the description
    # table, for backwards compatibility 

    my $found = 0;
    if (defined $params) {
	for (my $i = 1; $i <= $#$params; $i += 2) {
	    if ($params->[$i] =~ /\S/) {
		$found = 1;
		last;
	    }
	}
    }
    
    if ($found) {
	my %member_descrs = @$params;
	
	    $desc .= <<EOF;
<variablelist role="enum">
EOF
	for my $member_name (@members) {
	    my $member_descr = $member_descrs{$member_name};
	    
	    $desc .= "<varlistentry>\n<term><literal>$member_name</literal></term>\n";
	    if (defined $member_descr) {
		$desc .= "<listitem><simpara>".&ExpandAbbreviations($member_descr)."</simpara></listitem>\n";
	    } else {
		$desc .= "<listitem></listitem>\n";
	    }
            $desc .= "</varlistentry>\n";
	}
    
	$desc .= "</variablelist>";
    }

    if (exists $Since{$symbol}) {
	$desc .= "<para>Since $Since{$symbol}</para>";
    }
    $desc .= "</refsect2>\n";
    return ($synop, $desc);
}


#############################################################################
# Function    : OutputUnion
# Description : Returns the synopsis and detailed description of a union.
# Arguments   : $symbol - the union.
#		$declaration - the declaration of the union.
#############################################################################

sub OutputUnion {
    my ($symbol, $declaration) = @_;
    my $id = &CreateValidSGMLID ($symbol);
    my $synop = "union       <link linkend=\"$id\">$symbol</link>;\n";
    my $desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}union $symbol</title>\n";

    $desc .= MakeIndexterms($symbol);

    $declaration = &CreateValidSGML ($declaration);
    $desc .= "<programlisting>$declaration</programlisting>\n";

    $desc .= &MakeDeprecationNote($symbol);

    if (defined ($SymbolDocs{$symbol})) {
	$desc .= &ExpandAbbreviations($SymbolDocs{$symbol});
    }
    if (exists $Since{$symbol}) {
	$desc .= "<para>Since $Since{$symbol}</para>";
    }
    $desc .= "</refsect2>\n";
    return ($synop, $desc);
}


#############################################################################
# Function    : OutputVariable
# Description : Returns the synopsis and detailed description of a variable.
# Arguments   : $symbol - the extern'ed variable.
#		$declaration - the declaration of the variable.
#############################################################################

sub OutputVariable {
    my ($symbol, $declaration) = @_;
    my $id = &CreateValidSGMLID ($symbol);

    my $synop;
    if ($declaration =~ m/^\s*extern\s+((const\s+|unsigned\s+)*\w+)(\s+\*+|\*+|\s)(\s*)([A-Za-z]\w*)\s*;/) {
	my $mod = defined ($1) ? $1 : "";
	my $ptr = defined ($3) ? $3 : "";
	my $space = defined ($4) ? $4 : "";
	$synop = "extern      $mod$ptr$space<link linkend=\"$id\">$symbol</link>;\n";

    } else {
	$synop = "extern      <link linkend=\"$id\">$symbol</link>;\n";
    }

    my $desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}$symbol</title>\n";

    $desc .= MakeIndexterms($symbol);

    $declaration = &CreateValidSGML ($declaration);
    $desc .= "<programlisting>$declaration</programlisting>\n";

    $desc .= &MakeDeprecationNote($symbol);

    if (defined ($SymbolDocs{$symbol})) {
	$desc .= &ExpandAbbreviations($SymbolDocs{$symbol});
    }
    if (exists $Since{$symbol}) {
	$desc .= "<para>Since $Since{$symbol}</para>";
    }
    $desc .= "</refsect2>\n";
    return ($synop, $desc);
}


#############################################################################
# Function    : OutputFunction
# Description : Returns the synopsis and detailed description of a function.
# Arguments   : $symbol - the function.
#		$declaration - the declaration of the function.
#############################################################################

sub OutputFunction {
    my ($symbol, $declaration, $symbol_type) = @_;
    my $id = &CreateValidSGMLID ($symbol);

    # Take out the return type
    $declaration =~ s/<RETURNS>\s*((const\s+|G_CONST_RETURN\s+|unsigned\s+|struct\s+)*)(\w+)\s*(\**\s*(const|G_CONST_RETURN)?\s*\**\s*)<\/RETURNS>\n//;
    my $type_modifier = defined($1) ? $1 : "";
    my $type = $3;
    my $pointer = $4;
#   print "$symbol pointer is $pointer\n";
    my $xref = &MakeXRef ($type);
    my $start = "";
    if ($symbol_type eq 'USER_FUNCTION') {
#	$start = "typedef ";
    }

    # We output const rather than G_CONST_RETURN.
    $type_modifier =~ s/G_CONST_RETURN/const/g;
    $pointer =~ s/G_CONST_RETURN/const/g;

    my $ret_type_len = length ($start) + length ($type_modifier)
	+ length ($pointer) + length ($type);
    my $ret_type_output;
    my $symbol_len;
    if ($ret_type_len < $RETURN_TYPE_FIELD_WIDTH) {
	$ret_type_output = "$start$type_modifier$xref$pointer"
	    . (' ' x ($RETURN_TYPE_FIELD_WIDTH - $ret_type_len));
	$symbol_len = 0;
    } else {
#	$ret_type_output = "$start$type_modifier$xref$pointer\n"
#	    . (' ' x $RETURN_TYPE_FIELD_WIDTH);

	$ret_type_output = "$start$type_modifier$xref$pointer ";
	$symbol_len = $ret_type_len + 1 - $RETURN_TYPE_FIELD_WIDTH;
    }

    $symbol_len += length ($symbol);
    my $char1 = my $char2 = my $char3 = "";
    if ($symbol_type eq 'USER_FUNCTION') {
	$symbol_len += 3;
	$char1 = "(";
	$char2 = "*";
	$char3 = ")";
    }

    my ($symbol_output, $symbol_desc_output);
    if ($symbol_len < $SYMBOL_FIELD_WIDTH) {
	$symbol_output = "$char1<link linkend=\"$id\">$char2$symbol</link>$char3"
	    . (' ' x ($SYMBOL_FIELD_WIDTH - $symbol_len));
	$symbol_desc_output = "$char1$char2$symbol$char3"
	    . (' ' x ($SYMBOL_FIELD_WIDTH - $symbol_len));
    } else {
	$symbol_output = "$char1<link linkend=\"$id\">$char2$symbol</link>$char3\n"
	    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH));
	$symbol_desc_output = "$char1$char2$symbol$char3\n"
	    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH));
    }

    my $synop = $ret_type_output . $symbol_output . '(';
    my $desc = "<refsect2>\n<title><anchor id=\"$id\"${empty_element_end}${symbol} ()</title>\n";

    $desc .= MakeIndexterms($symbol);

    $desc  .= "<programlisting>${ret_type_output}$symbol_desc_output(";

    my $param_num = 0;
    while ($declaration ne "") {
	if ($declaration =~ s/^[\s,]+//) {
	    # skip whitespace and commas
	    next;

	} elsif ($declaration =~ s/^void\s*[,\n]//) {
	    $synop .= "void";
	    $desc  .= "void";

	} elsif ($declaration =~ s/^...\s*[,\n]//) {
	    if ($param_num == 0) {
		$synop .= "...";
		$desc  .= "...";
	    } else {
		$synop .= ",\n"
		    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH))
		    . " ...";
		$desc  .= ",\n"
		    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH))
		    . " ...";
	    }

	    # allow alphanumerics, '_', '[' & ']' in param names
	} elsif ($declaration =~ s/^(const\s+|G_CONST_RETURN\s+|unsigned\s+)*(struct\s+)?((?:long\s+|short\s+)?\w+)\s*(\**)\s*(const\s+)?(\**)?\s*(\w+)?\s*((?:\[\S*\])*)\s*[,\n]//) {
	    my $mod1 = defined($1) ? $1 : "";
	    if (defined($2)) { $mod1 .= $2; }
	    my $type = $3;
	    my $ptr1 = $4;
	    my $mod2 = defined($5) ? $5 : "";
	    my $ptr2 = $6;
	    my $name = defined($7) ? $7 : "";
	    if ($name) { $ptr1 = " " . $ptr1; }
	    my $array = defined($8) ? $8 : "";
	    my $xref = &MakeXRef ($type);

#	    print "Type: $mod1$type $ptr1 $mod2 $name $array\n";
	    if ($param_num == 0) {
		$synop .= "$mod1$xref$ptr1$mod2$ptr2$name$array";
		$desc  .= "$mod1$xref$ptr1$mod2$ptr2$name$array";
	    } else {
		$synop .= ",\n"
		    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH))
		    . " $mod1$xref$ptr1$mod2$ptr2$name$array";
		$desc  .= ",\n"
		    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH))
		    . " $mod1$xref$ptr1$mod2$ptr2$name$array";
	    }

	    # Try to match parameters which are functions.
	} elsif ($declaration =~ s/^(const\s+|unsigned\s+)*(struct\s+)?(\w+)\s*(\**)\s*(const\s+)?\(\s*\*\s*(\w+)\s*\)\s*\(([^)]*)\)\s*[,\n]//) {
	    my $mod1 = defined($1) ? $1 : "";
	    if (defined($2)) { $mod1 .= $2; }
	    my $type = $3;
	    my $ptr1 = $4;
	    my $mod2 = defined($5) ? $5 : "";
	    my $name = $6;
	    my $func_params = $7;
	    my $xref = &MakeXRef ($type);

#	    print "Type: $mod1$type$ptr1$mod2(*$name)($func_params)\n";
	    if ($param_num == 0) {
		$synop .= "$mod1$xref$ptr1$mod2 (*$name) ($func_params)";
		$desc  .= "$mod1$xref$ptr1$mod2 (*$name) ($func_params)";
	    } else {
		$synop .= ",\n"
		    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH))
		    . " $mod1$xref$ptr1$mod2 (*$name) ($func_params)";
		$desc  .= ",\n"
		    . (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH))
		    . " $mod1$xref$ptr1$mod2 (*$name) ($func_params)";
	    }

	} else {
	    print "###Can't parse args for function $symbol: $declaration\n";
	    last;
	}
	$param_num++;
    }
    $synop .= ");\n";
    $desc  .= ");</programlisting>\n";

    $desc .= &MakeDeprecationNote($symbol);

    my $parameters = &OutputParamDescriptions ("FUNCTION", $symbol);
    my $parameters_output = 0;

    if (defined ($SymbolDocs{$symbol})) {
	my $symbol_docs = &ExpandAbbreviations($SymbolDocs{$symbol});

	# Try to insert the parameter table at the author's desired position.
	# Otherwise we need to tag it onto the end.
	if ($symbol_docs =~ s/<!--PARAMETERS-->/$parameters/) {
	  $parameters_output = 1;
	}
	$desc .= $symbol_docs;
    }

    if ($parameters_output == 0) {
	$desc .= $parameters;
    }

    if (exists $Since{$symbol}) {
	$desc .= "<para>Since $Since{$symbol}</para>";
    }
    $desc .= "</refsect2>\n";
    return ($synop, $desc);
}


#############################################################################
# Function    : OutputParamDescriptions
# Description : Returns the DocBook output describing the parameters of a
#		function, macro or signal handler.
# Arguments   : $symbol_type - 'FUNCTION', 'MACRO' or 'SIGNAL'. Signal
#		  handlers have an implicit user_data parameter last.
#		$symbol - the name of the function/macro being described.
#############################################################################

sub OutputParamDescriptions {
    my ($symbol_type, $symbol) = @_;
    my $output = "";
    if (defined ($SymbolParams{$symbol})) {
	my $returns = "";
	my $params = $SymbolParams{$symbol};
	my $params_desc = "";
	my $j;
	for ($j = 0; $j <= $#$params; $j += 2) {
	    my $param_name = $$params[$j];
	    my $param = $$params[$j + 1];
	    if ($param_name eq "Returns") {
		$returns = &ExpandAbbreviations($param);
	    } else {
		if ($param_name eq "Varargs") {
		    $param_name = "...";
		}
		$param = &ExpandAbbreviations($param);
		$params_desc .= "<varlistentry><term><parameter>$param_name</parameter>&nbsp;:</term>\n<listitem><simpara>$param</simpara></listitem></varlistentry>\n";
	    }
	}

	# Signals have an implicit user_data parameter which we describe.
	if ($symbol_type eq "SIGNAL") {
	    $params_desc .= "<varlistentry><term><parameter>user_data</parameter>&nbsp;:</term>\n<listitem><simpara>user data set when the signal handler was connected.</simpara></listitem></varlistentry>\n";
	}

	# Start a table if we need one.
	if ($params_desc || $returns) {
	    $output .= <<EOF;
<variablelist role="params">
EOF

	    if ($params_desc ne "") {
#	        $output .= "<varlistentry><term>Parameters:</term><listitem></listitem></varlistentry>\n";
	        $output .= $params_desc;
	    }

	    # Output the returns info last.
	    if ($returns) {
		$output .= "<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara>$returns</simpara></listitem></varlistentry>\n";
	    }

	    # Finish the table.
	    $output .= "</variablelist>";
	}
    }
    return $output;
}


#############################################################################
# Function    : OutputSGMLFile
# Description : Outputs the final DocBook file for one section.
# Arguments   : $file - the name of the file.
#		$title - the title from the $MODULE-sections.txt file, which
#		  will be overriden by the title in the template file.
#		$section_id - the SGML id to use for the toplevel tag.
#		$includes - comma-separates list of include files added at top
#		  of synopsis, with '<' '>' around them.
#		$synopsis - reference to the DocBook for the Synopsis part.
#		$details - reference to the DocBook for the Details part.
#               $signal_synop - reference to the DocBook for the Signal Synopsis part
#               $signal_desc - reference to the DocBook for the Signal Description part
#               $args_synop - reference to the DocBook for the Arg Synopsis part
#               $args_desc - reference to the DocBook for the Arg Description part
#               $hierarchy - reference to the DocBook for the Object Hierarchy part
#               $interfaces - reference to the DocBook for the Interfaces part
#               $implementations - reference to the DocBook for the Known Implementations part
#               $prerequisites - reference to the DocBook for the Prerequisites part
#               $derived - reference to the DocBook for the Derived Interfaces part
#               $file_objects - reference to an array of objects in this file
#############################################################################

sub OutputSGMLFile {
    my ($file, $title, $section_id, $includes, $synopsis, $details, $signals_synop, $signals_desc, $args_synop, $args_desc, $hierarchy, $interfaces, $implementations, $prerequisites, $derived, $file_objects) = @_;

    # The edited title overrides the one from the sections file.
    my $new_title = $SymbolDocs{"$TMPL_DIR/$file:Title"};
    if (defined ($new_title) && $new_title !~ m/^\s*$/) {
	$title = $new_title;
#	print "Found title: $title\n";
    }
    my $short_desc = $SymbolDocs{"$TMPL_DIR/$file:Short_Description"};
    if (!defined ($short_desc) || $short_desc =~ m/^\s*$/) {
#	$short_desc = "one line description goes here.";
	$short_desc = "";
    } else {
	$short_desc = &ExpandAbbreviations($short_desc);
#	print "Found short_desc: $short_desc";
    }
    my $long_desc = $SymbolDocs{"$TMPL_DIR/$file:Long_Description"};
    if (!defined ($long_desc) || $long_desc =~ m/^\s*$/) {
	$long_desc = "<para>\nA longer description goes here.\n</para>\n";
    } else {
	$long_desc = &ExpandAbbreviations($long_desc);
#	print "Found long_desc: $long_desc";
    }
    my $see_also = $SymbolDocs{"$TMPL_DIR/$file:See_Also"};
    if (!defined ($see_also) || $see_also =~ m%^\s*(<para>)?\s*(</para>)?\s*$%) {
	$see_also = "";
    } else {
	$see_also = &ExpandAbbreviations($see_also);
#	print "Found see_also: $see_also";
    }
    if ($see_also) {
	$see_also = "<refsect1>\n<title>See Also</title>\n$see_also\n</refsect1>\n";
    }

    my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) =
	gmtime (time);
    my $month = (qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec))[$mon];
    $year += 1900;

    my $include_output = "";
    my $include;
    foreach $include (split (/,/, $includes)) {
	$include_output .= "#include &lt;${include}&gt;\n";
    }

    my $old_sgml_file = "$SGML_OUTPUT_DIR/$file.$OUTPUT_FORMAT";
    my $new_sgml_file = "$SGML_OUTPUT_DIR/$file.$OUTPUT_FORMAT.new";

    open (OUTPUT, ">$new_sgml_file")
	|| die "Can't create $new_sgml_file";

    my $object_anchors = "";
    foreach my $object (@$file_objects) {
	next if ($object eq $section_id);
	my $id = CreateValidSGMLID($object);
#	print "Debug: Adding anchor for $object\n";
	$object_anchors .= "<anchor id=\"$id\"$empty_element_end";
    }

    # Note: The refname and refpurpose are on the same line to stop
    # docbook-to-man 1.08 putting them on separate lines.
    #
    # We used to output this, but is messes up our UpdateFileIfChanged code
    # since it changes every day (and it is only used in the man pages):
    # "<refentry id="$section_id" revision="$mday $month $year">"

    if (lc($OUTPUT_FORMAT) eq "xml") {
        print OUTPUT $doctype_header;
    }

    print OUTPUT <<EOF;
<refentry id="$section_id">
<refmeta>
<refentrytitle>$title</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>\U$MODULE\E Library</refmiscinfo>
</refmeta>

<refnamediv>
<refname>$title</refname><refpurpose>$short_desc</refpurpose>
</refnamediv>

<refsynopsisdiv><title>Synopsis</title>
$object_anchors
<synopsis>

$include_output

$${synopsis}</synopsis>
</refsynopsisdiv>

$$hierarchy
$$prerequisites
$$derived
$$interfaces
$$implementations
$$args_synop
$$signals_synop

<refsect1>
<title>Description</title>
$long_desc
</refsect1>

<refsect1>
<title>Details</title>
$$details
</refsect1>
$$args_desc
$$signals_desc

$see_also
</refentry>
EOF
    close (OUTPUT);

    return &UpdateFileIfChanged ($old_sgml_file, $new_sgml_file, 0);
}


#############################################################################
# Function    : OutputBook
# Description : Outputs the SGML entities that need to be included into the
#		main SGML file for the module.
# Arguments   : $book_top - the declarations of the entities, which are added
#		  at the top of the main SGML file.
#		$book_bottom - the references to the entities, which are
#		  added in the main SGML file at the desired position.
#############################################################################

sub OutputBook {
    my ($book_top, $book_bottom) = @_;

    my $old_file = "$SGML_OUTPUT_DIR/$MODULE-doc.top";
    my $new_file = "$SGML_OUTPUT_DIR/$MODULE-doc.top.new";

    open (OUTPUT, ">$new_file")
	|| die "Can't create $new_file";
    print OUTPUT $book_top;
    close (OUTPUT);

    &UpdateFileIfChanged ($old_file, $new_file, 0);


    $old_file = "$SGML_OUTPUT_DIR/$MODULE-doc.bottom";
    $new_file = "$SGML_OUTPUT_DIR/$MODULE-doc.bottom.new";

    open (OUTPUT, ">$new_file")
	|| die "Can't create $new_file";
    print OUTPUT $book_bottom;
    close (OUTPUT);

    &UpdateFileIfChanged ($old_file, $new_file, 0);


    # If the main SGML file hasn't been created yet, we create it here.
    # The user can tweak it later.
    if ($MAIN_SGML_FILE && ! -e $MAIN_SGML_FILE) {
      open (OUTPUT, ">$MAIN_SGML_FILE")
	|| die "Can't create $MAIN_SGML_FILE";

      if (lc($OUTPUT_FORMAT) eq "xml") {
	  print OUTPUT <<EOF;
<?xml version="1.0"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" 
               "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<book id="index" xmlns:xi="http://www.w3.org/2003/XInclude">
EOF
      } else {
	print OUTPUT <<EOF;
<!doctype book PUBLIC "-//Davenport//DTD DocBook V3.0//EN" [
EOF
        print OUTPUT $book_top;
        print OUTPUT <<EOF;
]>
<book id="index">
EOF
      }

print OUTPUT <<EOF;
  <bookinfo>
    <title>[Insert name here] Reference Manual</title>
  </bookinfo>

  <chapter>
    <title>[Insert title here]</title>
EOF
      print OUTPUT $book_bottom;

      print OUTPUT <<EOF;
  </chapter>
</book>
EOF

      close (OUTPUT);
    }
}


#############################################################################
# Function    : CreateValidSGMLID
# Description : Creates a valid SGML 'id' from the given string.
#		NOTE: SGML ids are case-insensitive, so we have a few special
#		      cases to avoid clashes of ids.
# Arguments   : $id - the string to be converted into a valid SGML id.
#############################################################################

sub CreateValidSGMLID {
    my ($id) = $_[0];

    # Append ":CAPS" to all all-caps identifiers

    # Special case, '_' would end up as '' so we use 'gettext-macro' instead.
    if ($id eq "_") { return "gettext-macro"; }

    if ($id !~ /[a-z]/) { $id .= ":CAPS" };

    $id =~ s/[_ ]/-/g;
    $id =~ s/[,\.]//g;
    $id =~ s/^-*//;
    $id =~ s/::/-/g;

    return $id;
}


#############################################################################
# Function    : CreateValidSGML
# Description : This turns any chars which are used in SGML into entities,
#		e.g. '<' into '&lt;'
# Arguments   : $text - the text to turn into proper SGML.
#############################################################################

sub CreateValidSGML {
    my ($text) = @_;
    $text =~ s/&/&amp;/g;	# Do this first, or the others get messed up.
    $text =~ s/</&lt;/g;
    $text =~ s/>/&gt;/g;
    return $text;
}

#############################################################################
# Function    : ConvertSGMLChars
# Description : This turns chars which are used in SGML into entities,
#		e.g. '<' into '&lt;'. Depending on $SGML_MODE, this is done
#               unconditionally or only if the character doesn't seem to be 
#               part of an SGML construct (tag or entity reference)
# Arguments   : $text - the text to turn into proper SGML.
#############################################################################

sub ConvertSGMLChars {
    my ($text) = @_;
    if ($SGML_MODE) {
	$text =~ s/&(?![a-zA-Z#])/&amp;/g;	# Do this first, or the others get messed up.
	$text =~ s/<(?![a-zA-Z\/!])/&lt;/g;
	$text =~ s/(?<![a-zA-Z0-9"'\/-])>/&gt;/g;
    }
    else {
	$text =~ s/&/&amp;/g;	# Do this first, or the others get messed up.
	$text =~ s/</&lt;/g;
	$text =~ s/>/&gt;/g;
    }
    return $text;
}


#############################################################################
# Function    : ExpandAbbreviations
# Description : This turns the abbreviations function(), macro(), @param,
#		%constant, and #symbol into appropriate DocBook markup.
# Arguments   : $text - the text to expand.
#############################################################################

sub ExpandAbbreviations {
    my ($text) = @_;

    # Convert 'function()' or 'macro()'
    $text =~ s/(\w+)\s*\(\)/&MakeXRef($1, &tagify($1 . "()", "function"));/eg;

    # Convert '@param'
    $text =~ s/\@(\w+((\.|->)\w+)*)/<parameter>$1<\/parameter>/g;

    # Convert '%constant'. Also allow negative numbers, e.g. %-1.
    $text =~ s/\%(-?\w+)/<literal>$1<\/literal>/g;

    # Convert '#symbol'
    $text =~ s/#([\w-]+)/&MakeXRef($1, &tagify($1, "type"));/eg;

    return $text;
}

sub tagify {
   my ($text, $elem) = @_;
   return "<" . $elem . ">" . $text . "</" . $elem . ">";
}

#############################################################################
# Function    : MakeXRef
# Description : This returns a cross-reference link to the given symbol.
#		Though it doesn't try to do this for a few standard C types
#		that it	knows won't be in the documentation.
# Arguments   : $symbol - the symbol to try to create a XRef to.
#               $text - text text to put inside the XRef, defaults to $symbol
#############################################################################

sub MakeXRef {
    my ($symbol, $text) = ($_[0], $_[1]);
    if (!defined($text)) {
	$text = $symbol;

	# Get rid of special '-struct' suffix.
	$text =~ s/-struct$//;
    }

    #print "Getting type link for $symbol -> $text\n";

    my $symbol_id = &CreateValidSGMLID ($symbol);
    return "<link linkend=\"$symbol_id\">$text</link>";
}


#############################################################################
# Function    : MakeIndexterms
# Description : This returns a indexterm elements for the given symbol
# Arguments   : $symbol - the symbol to create indexterms for
#############################################################################

sub MakeIndexterms {
  my ($symbol) = $_[0];
  my $role = "";

  if (exists $Deprecated{$symbol}) {
      $role = "deprecated";
  }
  if (exists $Since{$symbol}) {
      $Since{$symbol} =~ /\s*([\w\.]*)\s*/;
      if ($role ne "") {
	  $role .= " ";
	}
      $role .= $1;
  }
  if ($role ne "") {
      $role = " role=\"$role\"";
  }
  return "<indexterm$role><primary>$symbol</primary></indexterm>";
 }

#############################################################################
# Function    : MakeDeprecationNote
# Description : This returns a deprecation warning for the given symbol.
# Arguments   : $symbol - the symbol to try to create a warning for.
#############################################################################

sub MakeDeprecationNote {
    my ($symbol) = $_[0];
    my $desc = "";
    my $note = "";
    if (exists $Deprecated{$symbol}) {
	$desc .= "<warning>";
	$desc .= "<para><literal>$symbol</literal> is deprecated and should not be used in newly-written code.";
	if ($Deprecated{$symbol} ne "") {
	    $note = &ExpandAbbreviations($Deprecated{$symbol});
	    $note =~ s/^\s+//;
	    $note =~ s/\s+$//;
	    $note =~ s%\n{2,}%\n</para>\n<para>\n%g;
	    $desc .= " " . $note;
	}
	$desc .= "</para></warning>\n";
    }
    return $desc;
}


#############################################################################
# Function    : GetHierarchy
# Description : Returns the DocBook output describing the ancestors and
#               immediate children of a GObject subclass. It uses the 
#               global @Objects and @ObjectLevels arrays to walk the tree.
# Arguments   : $object - the GtkObject subclass.
#############################################################################

sub GetHierarchy {
    my ($object) = @_;

    # Find object in the objects array.
    my $found = 0;
    my @children = ();
    my $i;
    my $level;
    my $j;
    for ($i = 0; $i < @Objects; $i++) {
	if ($found) {
	    if ($ObjectLevels[$i] <= $level) {
	    last;
	}
	    elsif ($ObjectLevels[$i] == $level + 1) {
		push (@children, $Objects[$i]);
	    }
	}
	elsif ($Objects[$i] eq $object) {
	    $found = 1;
	    $j = $i;
	    $level = $ObjectLevels[$i];
	}
    }
    if (!$found) {
	return "";
    }

    # Walk up the hierarchy, pushing ancestors onto the ancestors array.
    my @ancestors = ();
    push (@ancestors, $object);
#    print "Level: $level\n";
    while ($level > 1) {
	$j--;
	if ($ObjectLevels[$j] < $level) {
	    push (@ancestors, $Objects[$j]);
	    $level = $ObjectLevels[$j];
#	    print "Level: $level\n";
	}
    }

    # Output the ancestors list, indented and with links.
    my $hierarchy = "<synopsis>\n\n";
    $level = 0;
    for ($i = $#ancestors; $i >= 0; $i--) {
	my $link_text;
	# Don't add a link to the current widget, i.e. when i == 0.
	if ($i > 0) {
	    my $ancestor_id = &CreateValidSGMLID ($ancestors[$i]);
	    $link_text = "<link linkend=\"$ancestor_id\">$ancestors[$i]</link>";
	} else {
	    $link_text = "$ancestors[$i]";
	}
	if ($level == 0) {
	    $hierarchy .= "  $link_text\n";
	} else {
#	    $hierarchy .= ' ' x ($level * 6 - 3) . "|\n";
	    $hierarchy .= ' ' x ($level * 6 - 3) . "+----$link_text\n";
	}
	$level++;
    }
    for ($i = 0; $i <= $#children; $i++) {
      my $id = &CreateValidSGMLID ($children[$i]);
      my $link_text = "<link linkend=\"$id\">$children[$i]</link>";
      $hierarchy .= ' ' x ($level * 6 - 3) . "+----$link_text\n";
    }
    $hierarchy .= "</synopsis>\n";

    return $hierarchy;
}


#############################################################################
# Function    : GetInterfaces
# Description : Returns the DocBook output describing the interfaces 
#               implemented by a class. It uses the global %Interfaces hash.
# Arguments   : $object - the GtkObject subclass.
#############################################################################

sub GetInterfaces {
    my ($object) = @_;
    my $text = "";
    my $i;

    # Find object in the objects array.
    if (exists($Interfaces{$object})) {
        my @ifaces = split(' ', $Interfaces{$object});
	$text = <<EOF;
<para>
$object implements
EOF
	for ($i = 0; $i <= $#ifaces; $i++) {
	    my $id = &CreateValidSGMLID ($ifaces[$i]);
	    $text .= " <link linkend=\"$id\">$ifaces[$i]</link>";
	    if ($i < $#ifaces - 1) {
		$text .= ', ';
	    }
	    elsif ($i < $#ifaces) {
	        $text .= ' and ';
	    }
	    else {
	        $text .= '.';
	    }
	}
	$text .= <<EOF;
</para>
EOF
    }

    return $text;
}

#############################################################################
# Function    : GetImplementations
# Description : Returns the DocBook output describing the implementations 
#               of an interface. It uses the global %Interfaces hash.
# Arguments   : $object - the GtkObject subclass.
#############################################################################

sub GetImplementations {
    my ($object) = @_;
    my @impls = ();
    my $text = "";
    my $i;
    foreach my $key (keys %Interfaces) {
	if ($Interfaces{$key} =~ /\b$object\b/) {
	    push (@impls, $key);
	}
    }
    if ($#impls >= 0) {
	$text = <<EOF;
<para>
$object is implemented by
EOF
        for ($i = 0; $i <= $#impls; $i++) {
	    my $id = &CreateValidSGMLID ($impls[$i]);
	    $text .= " <link linkend=\"$id\">$impls[$i]</link>";
	    if ($i < $#impls - 1) {
		$text .= ', ';
	    }
	    elsif ($i < $#impls) {
		$text .= ' and ';
	    }
	    else {
		$text .= '.';
	    }
	}
	$text .= <<EOF;
</para>
EOF
    }
    return $text;
}


#############################################################################
# Function    : GetPrerequisites
# Description : Returns the DocBook output describing the prerequisites
#               of an interface. It uses the global %Prerequisites hash.
# Arguments   : $iface - the interface.
#############################################################################

sub GetPrerequisites {
    my ($iface) = @_;
    my $text = "";
    my $i;

    if (exists($Prerequisites{$iface})) {
	$text = <<EOF;
<para>
$iface requires
EOF
	my @prereqs = split(' ', $Prerequisites{$iface});
	for ($i = 0; $i <= $#prereqs; $i++) {
	    my $id = &CreateValidSGMLID ($prereqs[$i]);
	    $text .= " <link linkend=\"$id\">$prereqs[$i]</link>";
	    if ($i < $#prereqs - 1) {
		$text .= ', ';
	    }
	    elsif ($i < $#prereqs) {
	        $text .= ' and ';
	    }
	    else {
	        $text .= '.';
	    }
	}
	$text .= <<EOF;
</para>
EOF
    }
    return $text;
}

#############################################################################
# Function    : GetDerived
# Description : Returns the DocBook output describing the derived interfaces
#               of an interface. It uses the global %Prerequisites hash.
# Arguments   : $iface - the interface.
#############################################################################

sub GetDerived {
    my ($iface) = @_;
    my $text = "";
    my $i;

    my @derived = ();
    foreach my $key (keys %Prerequisites) {
	if ($Prerequisites{$key} =~ /\b$iface\b/) {
	    push (@derived, $key);
	}
    }
    if ($#derived >= 0) {
	$text = <<EOF;
<para>
$iface is required by
EOF
	for ($i = 0; $i <= $#derived; $i++) {
	    my $id = &CreateValidSGMLID ($derived[$i]);
	    $text .= " <link linkend=\"$id\">$derived[$i]</link>";
	    if ($i < $#derived - 1) {
		$text .= ', ';
	    }
	    elsif ($i < $#derived) {
		$text .= ' and ';
	    }
	    else {
		$text .= '.';
	    }
	}
	$text .= <<EOF;
</para>
EOF
    }
    return $text;
}


#############################################################################
# Function    : GetSignals
# Description : Returns the synopsis and detailed description DocBook output
#		for the signal handlers of a given GtkObject subclass.
# Arguments   : $object - the GtkObject subclass, e.g. 'GtkButton'.
#############################################################################

sub GetSignals {
    my ($object) = @_;
    my $synop = "";
    my $desc = "";

    my $i;
    for ($i = 0; $i <= $#SignalObjects; $i++) {
	if ($SignalObjects[$i] eq $object) {
#	    print "Found signal: $SignalNames[$i]\n";
	    my $name = $SignalNames[$i];
	    my $symbol = "${object}::${name}";
	    my $id = &CreateValidSGMLID ("$object-$name");

	    my $name_len = length ($name) + 2;
	    if ($name_len < $SIGNAL_FIELD_WIDTH) {
		$synop .= "&quot;<link linkend=\"$id\">$name</link>&quot;"
		    . (' ' x ($SIGNAL_FIELD_WIDTH - $name_len));
	    } else {
		$synop .= "&quot;<link linkend=\"$id\">$name</link>&quot;\n"
		    . (' ' x $SIGNAL_FIELD_WIDTH);
	    }

	    $desc .= "<refsect2><title><anchor id=\"$id\"${empty_element_end}The &quot;$name&quot; signal</title>\n";
	    $desc .= "<programlisting>";

	    $SignalReturns[$i] =~ m/\s*(const\s*)?(\w+)\s*(\**)/;
	    my $type_modifier = defined($1) ? $1 : "";
	    my $type = $2;
	    my $pointer = $3;
	    my $xref = &MakeXRef ($type);

	    my $ret_type_len = length ($type_modifier) + length ($pointer)
		+ length ($type);
	    my $ret_type_output = "$type_modifier$xref$pointer"
		. (' ' x ($RETURN_TYPE_FIELD_WIDTH - $ret_type_len));

	    $synop .= "${ret_type_output}user_function      (";
	    $desc  .= "${ret_type_output}user_function                  (";

	    my $sourceparams = $SourceSymbolParams{$symbol};
	    my @params = split ("\n", $SignalPrototypes[$i]);
	    my $j;
	    for ($j = 0; $j <= $#params; $j++) {
		# allow alphanumerics, '_', '[' & ']' in param names
		if ($params[$j] =~ m/^\s*(\w+)\s*(\**)\s*([\w\[\]]+)\s*$/) {
		    $type = $1;
		    $pointer = $2;
		    if (defined($sourceparams)) {
			$name = $$sourceparams[2 * $j];
		    }
		    else {
			$name = $3;
		    }
		    if (!defined($name)) {
		        $name = "arg$j";
		    }
		    $xref = &MakeXRef ($type);
		    $synop .= "$xref $pointer$name,\n";
		    $synop .= (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH));
		    $desc .= "$xref $pointer$name,\n";
		    $desc .= (' ' x ($SYMBOL_FIELD_WIDTH + $RETURN_TYPE_FIELD_WIDTH));
		} else {
		    print "###Can't parse arg: $params[$j]\nArgs:$SignalPrototypes[$i]\n";
		}
	    }
	    $xref = &MakeXRef ("gpointer");
	    $synop .= "$xref user_data);\n";
	    $desc  .= "$xref user_data);</programlisting>\n";

	    my $parameters = &OutputParamDescriptions ("SIGNAL", $symbol);
	    my $parameters_output = 0;

	    $AllSymbols{$symbol} = 1;
	    if (defined ($SymbolDocs{$symbol})) {
	        my $symbol_docs = &ExpandAbbreviations($SymbolDocs{$symbol});

		# Try to insert the parameter table at the author's desired
		# position. Otherwise we need to tag it onto the end.
		if ($symbol_docs =~ s/<!--PARAMETERS-->/$parameters/) {
		  $parameters_output = 1;
		}
		$desc .= $symbol_docs;

		if (!IsEmptyDoc($SymbolDocs{$symbol})) {
		    $AllDocumentedSymbols{$symbol} = 1;
		}
	    }

	    if ($parameters_output == 0) {
	        $desc .= $parameters;
	      }

	    if (exists $Since{$symbol}) {
	      $desc .= "<para>Since $Since{$symbol}</para>";
	    }
	    $desc .= "</refsect2>";
	}
    }
    return ($synop, $desc);
}


#############################################################################
# Function    : GetArgs
# Description : Returns the synopsis and detailed description DocBook output
#		for the Args of a given GtkObject subclass.
# Arguments   : $object - the GtkObject subclass, e.g. 'GtkButton'.
#############################################################################

sub GetArgs {
    my ($object) = @_;
    my $synop = "";
    my $desc = "";
    my $child_synop = "";
    my $child_desc = "";
    my $style_synop = "";
    my $style_desc = "";

    my $i;
    for ($i = 0; $i <= $#ArgObjects; $i++) {
	if ($ArgObjects[$i] eq $object) {
#	    print "Found arg: $ArgNames[$i]\n";
	    my $name = $ArgNames[$i];
	    # Remember only one colon so we don't clash with signals.
	    my $symbol = "${object}:${name}";
	    # I've used two dashes here for the same reason.
	    my $id = &CreateValidSGMLID ("$object--$name");

	    my $type = $ArgTypes[$i];
	    my $type_output;
	    my $range = $ArgRanges[$i];
	    my $range_output = CreateValidSGML($range);
	    my $default = $ArgDefaults[$i];
	    my $default_output = CreateValidSGML($default);

	    if ($type eq "GtkSignal") {
		$type = "GtkSignalFunc, gpointer";
		$type_output = &MakeXRef ("GtkSignalFunc") . ", "
		    . &MakeXRef ("gpointer");
	    } elsif ($type eq "GtkString") {
		$type = "gchar*";
		$type_output = &MakeXRef ("gchar") . "*";
	    } else {
		$type_output = &MakeXRef ($type);
	    }

	    my $flags = $ArgFlags[$i];
	    my $flags_string = "";

	    if ($flags =~ m/r/) {
		$flags_string = "Read";
	    }
	    if ($flags =~ m/w/) {
		if ($flags_string) { $flags_string .= " / "; }
		$flags_string .= "Write";
	    }
	    if ($flags =~ m/x/) {
		if ($flags_string) { $flags_string .= " / "; }
		$flags_string .= "Construct";
	    }
	    if ($flags =~ m/X/) {
		if ($flags_string) { $flags_string .= " / "; }
		$flags_string .= "Construct Only";
	    }

	    $AllSymbols{$symbol} = 1;
	    my $blurb;
	    if (defined($SymbolDocs{$symbol}) &&
		!IsEmptyDoc($SymbolDocs{$symbol})) {
		$blurb = &ExpandAbbreviations($SymbolDocs{$symbol});
		$AllDocumentedSymbols{$symbol} = 1;
	    }
	    else {
		if (!($ArgBlurbs[$i] eq "")) {
		    $AllDocumentedSymbols{$symbol} = 1;
		}
		$blurb = "<para>" . &CreateValidSGML ($ArgBlurbs[$i]) . "</para>";
	    }

	    my $pad1 = " " x (20 - length ($name));
	    my $pad2 = " " x (20 - length ($type));
	    my $kind = "";

	    if ($flags =~ m/c/) {
	        $kind = "child property";
	    }
	    elsif ($flags =~ m/s/) {
	        $kind = "style property";
	    }
	    else {
	        $kind = "property";
	    }

 	    my $arg_synop = "  &quot;<link linkend=\"$id\">$name</link>&quot;$pad1 $type_output $pad2 : $flags_string\n";
	    my $arg_desc = "<refsect2><title><anchor id=\"$id\"${empty_element_end}The &quot;<literal>$name</literal>&quot; $kind</title>\n";
	    $arg_desc .= "<programlisting>  &quot;$name&quot;$pad1 $type_output $pad2 : $flags_string</programlisting>\n";
	    $arg_desc .= $blurb;
	    if ($range ne "") {
	        $arg_desc .= "<para>Allowed values: $range_output</para>\n";
	    }
	    if ($default ne "") {
	        $arg_desc .= "<para>Default value: $default_output</para>\n";
	    }
	    if (exists $Since{$symbol}) {
	      $arg_desc .= "<para>Since $Since{$symbol}</para>\n";
	    }
	    $arg_desc .= "</refsect2>\n";

	    if ($flags =~ m/c/) {
	        $child_synop .= $arg_synop;
		$child_desc .= $arg_desc;
	    }
	    elsif ($flags =~ m/s/) {
	        $style_synop .= $arg_synop;
		$style_desc .= $arg_desc;
	    }
	    else {
	        $synop .= $arg_synop;
		$desc .= $arg_desc;
	    }
	}
    }
    return ($synop, $child_synop, $style_synop, $desc, $child_desc, $style_desc);
}


#############################################################################
# Function    : ReadSourceDocumentation
# Description : This reads in the documentation embedded in comment blocks
#		in the source code (for Gnome).
#		
#		Parameter descriptions override any in the template files.
#		Function descriptions are placed before any description from
#		the template files.
#
#		It recursively descends the source directory looking for .c
#		files and scans them looking for specially-formatted comment
#		blocks.
#
# Arguments   : $source_dir - the directory to scan.
#############################################################################

sub ReadSourceDocumentation {
    my ($source_dir) = @_;
#    print "Scanning source directory: $source_dir\n";

    # This array holds any subdirectories found.
    my (@subdirs) = ();
    
    opendir (SRCDIR, $source_dir)
	|| die "Can't open source directory $source_dir: $!";
    my $file;
    foreach $file (readdir (SRCDIR)) {
	if ($file =~ /^\./) {
	    next;
	} elsif (-d "$source_dir/$file") {
	    push (@subdirs, $file);
	} elsif ($file =~ m/\.[ch]$/) {
	    &ScanSourceFile ("$source_dir/$file");
	}
    }
    closedir (SRCDIR);

    # Now recursively scan the subdirectories.
    my $dir;
    foreach $dir (@subdirs) {
	next if ($IGNORE_FILES =~ m/(\s|^)\Q${dir}\E(\s|$)/);
	&ReadSourceDocumentation ("$source_dir/$dir");
    }
}


#############################################################################
# Function    : ScanSourceFile
# Description : Scans one source file looking for specially-formatted comment
#		blocks. It calls &MergeSourceDocumentation to merge any
#		documentation found with the documentation already read in
#		from the template files.
#		
# Arguments   : $file - the file to scan.
#############################################################################

sub ScanSourceFile {
    my ($file) = @_;
    my $basename;

    if ($file =~ m/^.*[\/\\]([^\/\\]*\.[hc])$/) {
	$basename = $1;
    } else {
	print "WARNING: Can't find basename of file $file\n";
	$basename = $file;
    }

    # Check if the basename is in the list of files to ignore.
    if ($IGNORE_FILES =~ m/(\s|^)\Q${basename}\E(\s|$)/) {
	return;
    }

    open (SRCFILE, $file)
	|| die "Can't open $file: $!";
    my $in_comment_block = 0;
    my $symbol;
    my ($in_description, $in_return, $in_since, $in_deprecated);
    my ($description, $return_desc, $return_start, $since_desc, $deprecated_desc);
    my $current_param;
    my $ignore_returns;
    my @params;
    while (<SRCFILE>) {
	# Look for the start of a comment block.
	if (!$in_comment_block) {
	    if (m%^\s*/\*.*\*/%) {
	        #one-line comment - not gtkdoc
	    } elsif (m%^\s*/\*\*\s%) {
#	      print "Found comment block start\n";

		$in_comment_block = 1;

		# Reset all the symbol data.
		$symbol = "";
		$in_description = 0;
		$in_return = 0;
		$in_since = 0;
		$in_deprecated = 0;
		$description = "";
		$return_desc = "";
		$since_desc = "";
		$deprecated_desc = "";
		$current_param = -1;
		$ignore_returns = 0;
		@params = ();
	    }
	    next;
	}

	# We're in a comment block. Check if we've found the end of it.
	if (m%^\s*\*+/%) {
	    if (!$symbol) {
		print <<EOF;
WARNING: Symbol name not found at the start of the comment block.
 $file line $.
EOF
	    } else {
		# Add the return value description onto the end of the params.
		if ($return_desc) {
		    push (@params, "Returns");
		    push (@params, $return_desc);
		}
                # Convert special SGML characters
                $description = &ConvertSGMLChars ($description);
                my $k;
                for ($k = 1; $k <= $#params; $k += 2) {
		    $params[$k] = &ConvertSGMLChars ($params[$k]);
		}

		$SourceSymbolDocs{$symbol} = $description;
		$SourceSymbolParams{$symbol} = [ @params ];

		if ($since_desc) {
		    $Since{$symbol} = &ConvertSGMLChars ($since_desc);
		}

		if ($deprecated_desc) {
		    if (exists $Deprecated{$symbol}) {
		    }
		    else {
			print <<EOF;
WARNING: $symbol is deprecated in the inline comments
         but no deprecation guards were found around the declaration.
         (See the --deprecated-guards option for gtkdoc-scan.)
EOF
		    }
		    $Deprecated{$symbol} = &ConvertSGMLChars ($deprecated_desc);
		}
	    }

	    $in_comment_block = 0;
	    next;
	}

	# Get rid of ' * ' at start of every line in the comment block.
	s%^\s*\*\s?%%;
	# But make sure we don't get rid of the newline at the end.
	if (!$_) {
	    $_ = "\n";
	}

	# If we haven't found the symbol name yet, look for it.
	if (!$symbol) {
	    if (m%^\s*([\w:-]*\w)\s*:?%) {
		$symbol = $1;
	    }
	    next;
	}

	# If we're in the return value description, add it to the end.
	if ($in_return) {
	    # If we find another valid returns line, we assume that the first
	    # one was really part of the description.
	    if (m%^\s*(returns:|return\s+value:|returns\s*)%i) {
		$description .= $return_start . $return_desc;
		$return_start = $1;
		$return_desc = $';
	    } elsif (m%^\s*since:%i) {
		$since_desc = $';
		$in_since = 1;
		$in_return = 0;
	    } elsif (m%^\s*deprecated:%i) {
		$deprecated_desc = $';
		$in_deprecated = 1;
		$in_return = 0;
	    } else {
		$return_desc .= $_;
	    }
	    next;
	}

	if ($in_since) {
	    if (m%^\s*(returns:|return\s+value:|returns\s*)%i) {
		$description .= $return_start . $return_desc;
		$return_start = $1;
		$return_desc = $';
		$in_return = 1;
		$in_since = 0;
	    } elsif (m%^\s*deprecated:%i) {
		$deprecated_desc = $';
		$in_deprecated = 1;
		$in_since = 0;
	    } else {
		$since_desc .= $_;
	    }
	    next;
	}

	if ($in_deprecated) {
	    if (m%^\s*(returns:|return\s+value:|returns\s*)%i) {
		$description .= $return_start . $return_desc;
		$return_start = $1;
		$return_desc = $';
		$in_return = 1;
		$in_deprecated = 0;
	    } elsif (m%^\s*since:%i) {
		$since_desc = $';
		$in_since = 1;
		$in_deprecated = 0;
	    } else {
		$deprecated_desc .= $_;
	    }
	    next;
	}

	# If we're in the description part, check for the 'Return' line.
	# If that isn't found, add the text to the end.
	if ($in_description) {
	    # Get rid of 'Description:'
	    s%^\s*Description:%%;

	    if (!$ignore_returns && m%^\s*(returns:|return\s+value:|returns\s*)%i) {
		$return_start = $1;
		$return_desc = $';
		$in_return = 1;
		next;
	    }
	    elsif (m%^\s*since:%i) {
		$since_desc = $';
		$in_since = 1;
		next;
	    }
	    elsif (m%^\s*deprecated:%i) {
		$deprecated_desc = $';
		$in_deprecated = 1;
		next;
	    }

	    $description .= $_;
	    next;
	}

	# We must be in the parameters. Check for the empty line at the end.
	if (m%^\s*$%) {
	    $in_description = 1;
	    next;
	}

	# Look for a parameter name.
	if (m%^\s*@(\S+)\s*:%) {
	    my $param_name = $1;
#	    print "Found parameter: $param_name\n";
	    # Allow '...' as the Varargs parameter.
	    if ($param_name eq "...") {
		$param_name = "Varargs";
	    }
	    if ("\L$param_name" eq "returns") {
	      $ignore_returns = 1;
	    }
	    push (@params, $param_name);
	    push (@params, $');
	    $current_param += 2;
	    next;
	}

	# We must be in the middle of a parameter description, so add it on
	# to the last element in @params.
	if ($current_param == -1) {
	    print <<EOF
ERROR parsing comment block file : parameter expected -
 $file:$.
EOF
	} else {
	    $params[$#params] .= $_;
	}
    }
    close (SRCFILE);
}

#############################################################################
# Function    : OutputMissingDocumentation
# Description : Outputs report of documentation coverage to a file
#
# Arguments   : none
#############################################################################

sub OutputMissingDocumentation {
     my $n_documented = 0;
     my $total = 0;
     my $symbol;
     my $percent;
     my $msg;
     my $buffer = "";
     my $buffer2 = "";

     open (UNDOCUMENTED, ">$ROOT_DIR/$MODULE-undocumented.txt")
          || die "Can't create $ROOT_DIR/$MODULE-undocumented.txt";

     foreach $symbol (sort (keys (%AllSymbols))) {
          if ($symbol !~ /:(Title|Long_Description|Short_Description|See_Also)/) {
	      $total++;
	      if (exists ($AllDocumentedSymbols{$symbol})) {
		  $n_documented++;
	      } elsif (exists $Deprecated{$symbol}) {
		  $buffer2 .= $symbol . "\n";
	      }
	      else {
		  $buffer .= $symbol . "\n";
	      }
          }
     }

     $buffer .= "\n" . $buffer2;
     
     if ($total == 0) {
	  $percent = 100;
     } else {
          $percent = ($n_documented / $total) * 100.0;
     }

     printf UNDOCUMENTED "%.0f%% symbol docs coverage.\n", $percent;
     print UNDOCUMENTED "$n_documented symbols documented.\n";
     print UNDOCUMENTED ($total - $n_documented) . " not documented.\n\n\n";

     print UNDOCUMENTED $buffer;

     close (UNDOCUMENTED);

     printf (("%.0f%% symbol docs coverage ($n_documented symbols documented, " . ($total - $n_documented) . " not documented)\nSee $MODULE-undocumented.txt for a list of missing docs.\nThe doc coverage percentage doesn't include intro sections.\n"), $percent);
}


#############################################################################
# Function    : OutputAllSymbols
# Description : Outputs list of all symbols to a file
#
# Arguments   : none
#############################################################################

sub OutputAllSymbols {
     my $n_documented = 0;
     my $total = 0;
     my $symbol;
     my $percent;
     my $msg;

     open (SYMBOLS, ">$ROOT_DIR/$MODULE-symbols.txt")
          || die "Can't create $ROOT_DIR/$MODULE-symbols.txt";

     foreach $symbol (sort (keys (%AllSymbols))) {
          print SYMBOLS $symbol . "\n"
     }

     close (SYMBOLS);
}


#############################################################################
# Function    : MergeSourceDocumentation
# Description : This merges documentation read from a source file into the
#		documentation read in from a template file.
#
#		Parameter descriptions override any in the template files.
#		Function descriptions are placed before any description from
#		the template files.
#
# Arguments   : none
#############################################################################

sub MergeSourceDocumentation {
    my $symbol;
    foreach $symbol (keys (%SymbolDocs)) {
        $AllSymbols{$symbol} = 1;

	my $have_tmpl_docs = 0;

	## See if the symbol is documented out-of-line
	my $tmpl_doc = $SymbolDocs{$symbol};
	$tmpl_doc = defined ($tmpl_doc) ? $tmpl_doc : "";
	$tmpl_doc =~ s/<\/?[a-z]+>//g;
	$tmpl_doc =~ s/\s//g;
	if ($tmpl_doc ne "") {
	    $have_tmpl_docs = 1;
	}

	if (exists ($SourceSymbolDocs{$symbol})) {
	    my $src_doc = $SourceSymbolDocs{$symbol};
	    my $tmpl_doc = $SymbolDocs{$symbol};
	    my $type = $DeclarationTypes {$symbol};

	    my $item = "Parameter";
	    if (defined ($type)) {
	      if ($type eq 'STRUCT') {
		$item = "Field";
	      } elsif ($type eq 'ENUM') {
		$item = "Value";
	      }
	    }

	    $tmpl_doc = defined ($tmpl_doc) ? $tmpl_doc : "";
	    $src_doc =~ s/^\s+//;
	    $src_doc =~ s/\s+$//;

	    if ($have_tmpl_docs) {
		    print <<EOF;
WARNING: Documentation in template file for $symbol being overriden by inline comments
EOF
	    }

            if ($src_doc ne "") {
                 $AllDocumentedSymbols{$symbol} = 1;
            }

	    # Convert <!--PARAMETERS--> with any blank lines around it to
	    # a </para> followed by <!--PARAMETERS--> followed by <para>.
	    $src_doc =~ s%\n+\s*<!--PARAMETERS-->\s*\n+%\n</para>\n<!--PARAMETERS-->\n<para>\n%g;

	    # If there is a blank line, finish the paragraph and start another.
	    if ($src_doc =~ s%\n{2,}%\n</para>\n<para>\n%g) {
#		print "Converted blank lines:\n$src_doc\n";
	    }
	    $SymbolDocs{$symbol} = "<para>\n$src_doc</para>\n$tmpl_doc";

	    if ($symbol =~ m/.*::.*/) {
		# For signals we prefer the param names from the source docs,
	        # since the ones from the templates are likely to contain the
	        # artificial argn names which are generated by gtkdoc-scangobj.
		$SymbolParams{$symbol} = $SourceSymbolParams{$symbol}
	    }
	    else {
		# The templates contain the definitive parameter names and order,
		# so we will not change that. We only override the actual text.
		my $tmpl_params = $SymbolParams{$symbol};
		if (!defined ($tmpl_params)) {
		    next;
		}

		my $params = $SourceSymbolParams{$symbol};
		my $j;
		for ($j = 0; $j <= $#$tmpl_params; $j += 2) {
		    my $tmpl_param_name = $$tmpl_params[$j];
		    my $tmpl_param_desc = $$tmpl_params[$j + 1];

		    # Try to find the param in the source comment documentation.
		    my $found = 0;
		    my $k;
		    for ($k = 0; $k <= $#$params; $k += 2) {
			my $param_name = $$params[$k];
			my $param_desc = $$params[$k + 1];

			# We accept changes in case, since the Gnome source docs
			# contain a lot of these.
			if ("\L$param_name" eq "\L$tmpl_param_name") {
			    $found = 1;

			    # Override the description.
			    $$tmpl_params[$j + 1] = $param_desc ;

			    # Set the name to "" to mark it as used.
			    $$params[$k] = "";
			    last;
			}
		    }

		    # Output a warning if the parameter is not found.
		    if (!$found) {
			print <<EOF;
WARNING: $item description missing in source code comment block -
         $type: $symbol $item: $tmpl_param_name.
EOF

			# If it looks like the parameters are there, but not
			# in the right place, try to explain a bit better.
			if ($src_doc =~ m/\@$tmpl_param_name:/) {
			  print <<EOF;
         Parameters must start on the line immediately after the function
	 or macro name.
EOF
			}
		    }
		}

		# Now we output a warning if parameters have been described which
		# do not exist.
		for ($j = 0; $j <= $#$params; $j += 2) {
		    my $param_name = $$params[$j];
		    if ($param_name) {
			print <<EOF;
WARNING: $item described in source code comment block but does not exist -
         $type: $symbol $item: $param_name.
EOF
		    }
		}
	    }
	} else {
	    if ($have_tmpl_docs) {
		$AllDocumentedSymbols{$symbol} = 1;
	    }
	}
   }
}

sub IsEmptyDoc {
    my ($doc) = @_;

    if ($doc =~ /^\s*<para>\s*(FIXME)?\s*<\/para>\s*$/) {
	return 1;
    }
    else {
	return 0;
    }
}

#############################################################################
# LIBRARY FUNCTIONS -	These functions are used in both gtkdoc-mkdb and
#			gtkdoc-mktmpl and should eventually be moved to a
#			separate library.
#############################################################################

#############################################################################
# Function    : ReadDeclarationsFile
# Description : This reads in a file containing the function/macro/enum etc.
#		declarations.
#		
#		Note that in some cases there are several declarations with
#		the same name, e.g. for conditional macros. In this case we
#		set a flag in the %DeclarationConditional hash so the
#		declaration is not shown in the docs.
#
#		If a macro and a function have the same name, e.g. for
#		gtk_object_ref, the function declaration takes precedence.
#
#		Some opaque structs are just declared with 'typedef struct
#		_name name;' in which case the declaration may be empty.
#		The structure may have been found later in the header, so
#		that overrides the empty declaration.
#		
# Arguments   : $file - the declarations file to read
#		$override - if declarations in this file should override
#			any current declaration.
#############################################################################

sub ReadDeclarationsFile {
    my ($file, $override) = @_;

    if ($override == 0) {
	%Declarations = ();
	%DeclarationTypes = ();
	%DeclarationConditional = ();
	%DeclarationOutput = ();
    }

    open (INPUT, $file)
	|| die "Can't open $file";
    my $declaration_type = "";
    my $declaration_name;
    my $declaration;
    my $is_deprecated = 0;
    while (<INPUT>) {
	if (!$declaration_type) {
	    if (m/^<([^>]+)>/) {
		$declaration_type = $1;
		$declaration_name = "";
#		print "Found declaration: $declaration_type\n";
		$declaration = "";
	    }
	} else {
	    if (m%^<NAME>(.*)</NAME>%) {
		$declaration_name = $1;
            } elsif (m%^<DEPRECATED/>%) {
                $is_deprecated = 1;
            } elsif (m%^</$declaration_type>%) {
#		print "Found end of declaration: $declaration_name\n";
		# Check that the declaration has a name
		if ($declaration_name eq "") {
		    print "ERROR: $declaration_type has no name $file:$.\n";
		}

		# If the declaration is an empty typedef struct _XXX XXX
		# set the flag to indicate the struct has a typedef.
	        if ($declaration_type eq 'STRUCT'
		    && $declaration =~ m/^\s*$/) {
#		    print "Struct has typedef: $declaration_name\n";
		    $StructHasTypedef{$declaration_name} = 1;
		}

		# Check if the symbol is already defined.
		if (defined ($Declarations{$declaration_name})
		    && $override == 0) {
		    # Function declarations take precedence.
		    if ($DeclarationTypes{$declaration_name} eq 'FUNCTION') {
			# Ignore it.
		    } elsif ($declaration_type eq 'FUNCTION') {
			if ($is_deprecated) {
			    $Deprecated{$declaration_name} = "";
			}
			$Declarations{$declaration_name} = $declaration;
			$DeclarationTypes{$declaration_name} = $declaration_type;
		    } elsif ($DeclarationTypes{$declaration_name}
			      eq $declaration_type) {
			# If the existing declaration is empty, or is just a
		        # forward declaration of a struct, override it.
			if ($declaration_type eq 'STRUCT') {
			    if ($Declarations{$declaration_name} =~ m/^\s*(struct\s+\w+\s*;)?\s*$/) {
				if ($is_deprecated) {
				    $Deprecated{$declaration_name} = "";
				}
				$Declarations{$declaration_name} = $declaration;
			    } elsif ($declaration =~ m/^\s*(struct\s+\w+\s*;)?\s*$/) {
				# Ignore an empty or forward declaration.
			    } else {
				print "WARNING: Structure has multiple definitions: $declaration_name\n";
			    }

			} else {
			    # set flag in %DeclarationConditional hash for
			    # multiply defined macros/typedefs.
			    $DeclarationConditional{$declaration_name} = 1;
			}
		    } else {
			print "ERROR: $declaration_name has multiple definitions\n";
		    }
		} else {
		    if ($is_deprecated) {
			$Deprecated{$declaration_name} = "";
		    }
		    $Declarations{$declaration_name} = $declaration;
		    $DeclarationTypes{$declaration_name} = $declaration_type;
		}

		$declaration_type = "";
                $is_deprecated = 0;
	    } else {
		$declaration .= $_;
	    }
	}
    }
    close (INPUT);
}


#############################################################################
# Function    : ReadSignalsFile
# Description : This reads in an existing file which contains information on
#		all GTK signals. It creates the arrays @SignalNames and
#		@SignalPrototypes containing info on the signals. The first
#		line of the SignalPrototype is the return type of the signal
#		handler. The remaining lines are the parameters passed to it.
#		The last parameter, "gpointer user_data" is always the same
#		so is not included.
# Arguments   : $file - the file containing the signal handler prototype
#			information.
#############################################################################

sub ReadSignalsFile {
    my ($file) = @_;

    my $in_signal = 0;
    my $signal_object;
    my $signal_name;
    my $signal_returns;
    my $signal_prototype;

    # Reset the signal info.
    @SignalObjects = ();
    @SignalNames = ();
    @SignalReturns = ();
    @SignalPrototypes = ();

    if (! -f $file) {
	return;
    }
    if (!open (INPUT, $file)) {
	warn "Can't open $file - skipping signals\n";
	return;
    }
    while (<INPUT>) {
	if (!$in_signal) {
	    if (m/^<SIGNAL>/) {
		$in_signal = 1;
		$signal_object = "";
		$signal_name = "";
		$signal_returns = "";
		$signal_prototype = "";
	    }
	} else {
	    if (m/^<NAME>(.*)<\/NAME>/) {
		$signal_name = $1;
		if ($signal_name =~ m/^(.*)::(.*)$/) {
		    $signal_object = $1;
		    ($signal_name = $2) =~ s/_/-/g;
#		    print "Found signal: $signal_name\n";
		} else {
		    print "Invalid signal name: $signal_name\n";
		}
	    } elsif (m/^<RETURNS>(.*)<\/RETURNS>/) {
		$signal_returns = $1;
	    } elsif (m%^</SIGNAL>%) {
#		print "Found end of signal: ${signal_object}::${signal_name}\nReturns: ${signal_returns}\n${signal_prototype}";
		push (@SignalObjects, $signal_object);
		push (@SignalNames, $signal_name);
		push (@SignalReturns, $signal_returns);
	        push (@SignalPrototypes, $signal_prototype);
		$in_signal = 0;
	    } else {
		$signal_prototype .= $_;
	    }
	}
    }
    close (INPUT);
}


#############################################################################
# Function    : ReadTemplateFile
# Description : This reads in the manually-edited documentation file
#		corresponding to the file currently being created, so we can
#		insert the documentation at the appropriate places.
#		It outputs %SymbolTypes, %SymbolDocs and %SymbolParams, which
#		is a hash of arrays.
#		NOTE: This function is duplicated in gtkdoc-mkdb (but
#		slightly different).
# Arguments   : $docsfile - the template file to read in.
#		$skip_unused_params - 1 if the unused parameters should be
#			skipped.
#############################################################################

sub ReadTemplateFile {
    my ($docsfile, $skip_unused_params) = @_;

    my $template = "$docsfile.sgml";
#    print "Reading $template\n";
    if (! -f $template) {
	print "File doesn't exist: $template\n";
	return; 
    }

    my $current_type = "";	# Type of symbol being read.
    my $current_symbol = "";	# Name of symbol being read.
    my $symbol_doc = "";		# Description of symbol being read.
    my @params;			# Parameter names and descriptions of current
				#   function/macro/function typedef.
    my $current_param = -1;	# Index of parameter currently being read.
				#   Note that the param array contains pairs
				#   of param name & description.
    my $in_unused_params = 0;	# True if we are reading in the unused params.

    open (DOCS, "$template")
	|| die "Can't open file $template: $!";
    while (<DOCS>) {
	if (m/^<!-- ##### ([A-Z_]+) (\S+) ##### -->/) {
	    my $type = $1;
	    my $symbol = $2;
	    if ($symbol eq "Title"
		|| $symbol eq "Short_Description"
		|| $symbol eq "Long_Description"
		|| $symbol eq "See_Also") {
		$symbol = $docsfile . ":" . $symbol;
	    }
#	    print "Found symbol: $symbol\n";

	    # Store previous symbol, but remove any trailing blank lines.
	    if ($current_symbol ne "") {
		$symbol_doc =~ s/\s+$//;
		$SymbolTypes{$current_symbol} = $current_type;
		$SymbolDocs{$current_symbol} = $symbol_doc;
		if ($current_param >= 0) {
		    if ($current_param > 0) {
			if ($params[$current_param - 1] eq "Deprecated") {
			    $Deprecated{$current_symbol} = pop (@params);
			    pop (@params);
			    $current_param -= 2;
			}
		    }
		    if ($current_param > 0) {
			if ($params[$current_param - 1] eq "Since") {
			    $Since{$current_symbol} = pop (@params);
			    pop (@params);
			    $current_param -= 2;
			}
		    }
		    # look for deprecated again to support both orders
		    if ($current_param > 0) {
			if ($params[$current_param - 1] eq "Deprecated") {
			    $Deprecated{$current_symbol} = pop (@params);
			    pop (@params);
			    $current_param -= 2;
			}
		    }
		    $SymbolParams{$current_symbol} = [ @params ];
		} else {
		    # Delete any existing params in case we are overriding a
		    # previously read template.
		    delete $SymbolParams{$current_symbol};
		}
	    }
	    $current_type = $type;
	    $current_symbol = $symbol;
	    $current_param = -1;
	    $in_unused_params = 0;
	    $symbol_doc = "";
	    @params = ();

	} elsif (m/^<!-- # Unused Parameters # -->/) {
#	    print "DEBUG: Found unused parameters\n";
	    $in_unused_params = 1;
	    next;

	} elsif ($in_unused_params && $skip_unused_params) {
	    # When outputting the DocBook we skip unused parameters.
#	    print "DEBUG: Skipping unused param: $_";
	    next;

	} else {
	    # Check if param found
	    if (s/^\@(\S+):\040?//) {
		my $param_name = $1;
		# Allow variations of 'Returns'
		if ($param_name =~ m/^[Rr]eturns?$/) {
		    $param_name = "Returns";
		}
#		print "Found param: $param_name\n";
		push (@params, $param_name);
		push (@params, $_);
		$current_param += 2;
		next;
	    }

	    if ($current_param >= 0) {
		$params[$current_param] .= $_;
	    } else {
		$symbol_doc .= $_;
	    }
	}
    }

    # Remember to finish the current symbol doccs.
    if ($current_symbol ne "") {
	$symbol_doc =~ s/\s+$//;
	$SymbolTypes{$current_symbol} = $current_type;
	$SymbolDocs{$current_symbol} = $symbol_doc;
	if ($current_param >= 0) {
	    if ($current_param > 0) {
		if ($params[$current_param - 1] eq "Deprecated") {
		    $Deprecated{$current_symbol} = pop (@params);
		    pop (@params);
		    $current_param -= 2;
		}
	    }
	    if ($current_param > 0) {
		if ($params[$current_param - 1] eq "Since") {
		    $Since{$current_symbol} = pop (@params);
		    pop (@params);
		    $current_param -= 2;
		}
	    }
	    if ($current_param > 0) {
		if ($params[$current_param - 1] eq "Deprecated") {
		    $Deprecated{$current_symbol} = pop (@params);
		    pop (@params);
		    $current_param -= 2;
		}
	    }
	    $SymbolParams{$current_symbol} = [ @params ];
	} else {
	    delete $SymbolParams{$current_symbol};
	}
    }

    close (DOCS);
}


#############################################################################
# Function    : ReadObjectHierarchy
# Description : This reads in the $MODULE-hierarchy.txt file containing all
#		the GtkObject subclasses described in this module (and their
#		ancestors).
#		It places them in the @Objects array, and places their level
#		in the widget hierarchy in the @ObjectLevels array, at the
#		same index. GtkObject, the root object, has a level of 1.
#
#               FIXME: the version in gtkdoc-mkdb also generates tree_index.sgml
#               as it goes along, this should be split out into a separate
#               function.
#
# Arguments   : none
#############################################################################

sub ReadObjectHierarchy {
    @Objects = ();
    @ObjectLevels = ();

    if (! -f $OBJECT_TREE_FILE) {
	return;
    }
    if (!open (INPUT, $OBJECT_TREE_FILE)) {
	warn "Can't open $OBJECT_TREE_FILE - skipping object tree\n";
	return;
    }

    my $old_tree_index = "$SGML_OUTPUT_DIR/tree_index.sgml";
    my $new_tree_index = "$SGML_OUTPUT_DIR/tree_index.new";
    my $tree_header = $doctype_header;
    $tree_header =~ s/<!DOCTYPE \w+/<!DOCTYPE screen/;

    open (OUTPUT, ">$new_tree_index")
	|| die "Can't create $new_tree_index";
    print (OUTPUT "$tree_header<screen>\n");

    # Only emit objects if they are supposed to be documented, or if
    # they have documented children. To implement this, we maintain a
    # stack of pending objects which will be emitted if a documented
    # child turns up.
    my @pending_objects = ();
    my @pending_levels = ();
    while (<INPUT>) {
        if (m/\S+/) {
	    my $object = $&;
	    my $level = (length($`)) / 2 + 1;
            my $xref = "";

	    while (($#pending_levels >= 0) && ($pending_levels[$#pending_levels] >= $level)) {
	        my $pobject = pop(@pending_objects);
	        my $plevel = pop(@pending_levels);
	    }

   	    push (@pending_objects, $object);
	    push (@pending_levels, $level);

            if (exists($KnownSymbols{$object}) && $KnownSymbols{$object} == 1) {
   	        while ($#pending_levels >= 0) {
                    $object = shift @pending_objects;
		    $level = shift @pending_levels;
   	            $xref = &MakeXRef ($object);

 	            print (OUTPUT ' ' x ($level * 4), "$xref\n");
	            push (@Objects, $object);
	            push (@ObjectLevels, $level);
                }
            }
	}
    }
    print (OUTPUT "</screen>\n");

    close (INPUT);
    close (OUTPUT);

    &UpdateFileIfChanged ($old_tree_index, $new_tree_index, 0);

    &OutputObjectList;
}

#############################################################################
# Function    : ReadInterfaces
# Description : This reads in the $MODULE.interfaces file.
#
# Arguments   : none
#############################################################################

sub ReadInterfaces {
    %Interfaces = ();

    if (! -f $INTERFACES_FILE) {
	return;
    }
    if (!open (INPUT, $INTERFACES_FILE)) {
	warn "Can't open $INTERFACES_FILE - skipping interfaces\n";
	return;
    }

    while (<INPUT>) {
       chomp;
       my ($object, @ifaces) = split;
       if (exists($KnownSymbols{$object}) && $KnownSymbols{$object} == 1) {
           my @knownIfaces = ();

           # filter out private interfaces, but leave foreign interfaces
	   foreach my $iface (@ifaces) {
	       if (!exists($KnownSymbols{$iface}) || $KnownSymbols{$iface} == 1) {
                   push (@knownIfaces, $iface);
	       }
	     }

           $Interfaces{$object} = join(' ', @knownIfaces);
       }
    }
    close (INPUT);
}

#############################################################################
# Function    : ReadPrerequisites
# Description : This reads in the $MODULE.prerequisites file.
#
# Arguments   : none
#############################################################################

sub ReadPrerequisites {
    %Prerequisites = ();

    if (! -f $PREREQUISITES_FILE) {
	return;
    }
    if (!open (INPUT, $PREREQUISITES_FILE)) {
	warn "Can't open $PREREQUISITES_FILE - skipping prerequisites\n";
	return;
    }

    while (<INPUT>) {
       chomp;
       my ($iface, @prereqs) = split;
       if (exists($KnownSymbols{$iface}) && $KnownSymbols{$iface} == 1) {
           my @knownPrereqs = ();

           # filter out private prerequisites, but leave foreign prerequisites
	   foreach my $prereq (@prereqs) {
	       if (!exists($KnownSymbols{$prereq}) || $KnownSymbols{$prereq} == 1) {
                  push (@knownPrereqs, $prereq);
	       }
	   }

           $Prerequisites{$iface} = join(' ', @knownPrereqs);
       }
    }
    close (INPUT);
}

#############################################################################
# Function    : ReadArgsFile
# Description : This reads in an existing file which contains information on
#		all GTK args. It creates the arrays @ArgObjects, @ArgNames,
#		@ArgTypes, @ArgFlags, @ArgNicks and @ArgBlurbs containing info 
#               on the args.
# Arguments   : $file - the file containing the arg information.
#############################################################################

sub ReadArgsFile {
    my ($file) = @_;

    my $in_arg = 0;
    my $arg_object;
    my $arg_name;
    my $arg_type;
    my $arg_flags;
    my $arg_nick;
    my $arg_blurb;
    my $arg_default;
    my $arg_range;

    # Reset the args info.
    @ArgObjects = ();
    @ArgNames = ();
    @ArgTypes = ();
    @ArgFlags = ();
    @ArgNicks = ();
    @ArgBlurbs = ();
    @ArgDefaults = ();
    @ArgRanges = ();

    if (! -f $file) {
	return;
    }
    if (!open (INPUT, $file)) {
	warn "Can't open $file - skipping args\n";
	return;
    }
    while (<INPUT>) {
	if (!$in_arg) {
	    if (m/^<ARG>/) {
		$in_arg = 1;
		$arg_object = "";
		$arg_name = "";
		$arg_type = "";
		$arg_flags = "";
		$arg_nick = "";
		$arg_blurb = "";
		$arg_default = "";
		$arg_range = "";
	    }
	} else {
	    if (m/^<NAME>(.*)<\/NAME>/) {
		$arg_name = $1;
		if ($arg_name =~ m/^(.*)::(.*)$/) {
		    $arg_object = $1;
		    ($arg_name = $2) =~ s/_/-/g;
#		    print "Found arg: $arg_name\n";
		} else {
		    print "Invalid arg name: $arg_name\n";
		}
	    } elsif (m/^<TYPE>(.*)<\/TYPE>/) {
		$arg_type = $1;
	    } elsif (m/^<RANGE>(.*)<\/RANGE>/) {
		$arg_range = $1;
	    } elsif (m/^<FLAGS>(.*)<\/FLAGS>/) {
		$arg_flags = $1;
	    } elsif (m/^<NICK>(.*)<\/NICK>/) {
		$arg_nick = $1;
	    } elsif (m/^<BLURB>(.*)<\/BLURB>/) {
		$arg_blurb = $1;
		if ($arg_blurb eq "(null)") {
		  $arg_blurb = "";
		  print <<EOF;
WARNING: Property ${arg_object}::${arg_name} has no documentation.
EOF
		}
	    } elsif (m/^<DEFAULT>(.*)<\/DEFAULT>/) {
		$arg_default = $1;
	    } elsif (m%^</ARG>%) {
#		print "Found end of arg: ${arg_object}::${arg_name}\n${arg_type} : ${arg_flags}\n";
		push (@ArgObjects, $arg_object);
		push (@ArgNames, $arg_name);
		push (@ArgTypes, $arg_type);
		push (@ArgRanges, $arg_range);
		push (@ArgFlags, $arg_flags);
		push (@ArgNicks, $arg_nick);
		push (@ArgBlurbs, $arg_blurb);
		push (@ArgDefaults, $arg_default);
		$in_arg = 0;
	    }
	}
    }
    close (INPUT);
}


#############################################################################
# Function    : CheckIsObject
# Description : Returns 1 if the given name is a GtkObject or a subclass.
#		It uses the global @Objects array.
#		Note that the @Objects array only contains classes in the
#		current module and their ancestors - not all GTK classes.
# Arguments   : $name - the name to check.
#############################################################################

sub CheckIsObject {
    my ($name) = @_;

    my $object;
    foreach $object (@Objects) {
	if ($object eq $name) {
	    return 1;
	}
    }
    return 0;
}