suikawiki/script/wiki.cgi

#!/usr/bin/perl
# wiki.cgi - This is YukiWiki, yet another Wiki clone.
#
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.

use strict;
use lib qw(./lib);
use CGI::Carp qw(fatalsToBrowser);
our $VERSION = do{my @r=(q$Revision: 1.26 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};

require 'wikidata/suikawiki-config.ph';
use Fcntl;
##############################
my %fmt;        ## formatter objects
my %embed_command = (
        searched        => '^\[\[#searched:([^\]]+)\]\]$',
        form    => qr/\[\[\#form(?:\(([A-Za-z0-9-]+)\))?:'((?:[^'\\]|\\.)*)':'((?:[^'\\]|\\.)*)'(?::'((?:[^'\\]|\\.)*)')?\]\]/,
);
our ($modifier_dbtype,$url_cgi,%uri,%PathTo,$use_exists);
our (%PageName,$kanjicode,$lang,%FixedPage);

##############################
my $info_LastModified = 'LastModified';
my $info_IsFrozen = 'IsFrozen';
##############################
my %form;
our %database;
our $database;
my %infobase;
my %interwiki;
##############################
my %page_command = (
    $PageName{RssPage} => 'rss',
);
my %command_do = (
    read => \&do_read,
    TEXT_CSS => \&do_output_css,
    edit => \&do_edit,
    adminedit => \&do_adminedit,
    adminchangepassword => \&do_adminchangepassword,
    write => \&do_write,
    searchform => \&do_searchform,
    comment => \&do_comment,
    RandomJump  => \&do_random_jump,
    rss => \&do_rss,
    diff => \&do_diff,
    wikiform    => \&do_wikiform,
    map => \&do_map,
);
my $UA = '';  ## User agent name
$| = 1;
##############################

sub main {
    $UA = $main::ENV{HTTP_USER_AGENT};
    &open_db;
    &init_form;
    if ($command_do{$form{mycmd}}) {
        &{$command_do{$form{mycmd}}};
    } else {
        &{$command_do{read}};
    }
    &close_db;
}

sub do_read {
  my $content = $database{$form{mypage}};
  #print "content-type:text/plain;charset=euc-jp\n\n".gmtime."Get Lastmodified\n";
  my $lm = &get_info($form{mypage}, $info_LastModified);
  wiki::referer::add ($form{mypage}, $ENV{HTTP_REFERER});
  wiki::useragent::add ($ENV{HTTP_USER_AGENT});
  #print gmtime."Search...\n";
  my ($r, $c) = get_search_result ($form{mypage});
  my $rl = wiki::referer::list_html ($form{mypage});
  my @toc;
  push @toc, qq(-<a href="#wikipage-see-also">@{[&Resource('SeeAlso',escape=>1)]}</a>) if $c;
  push @toc, qq(-<a href="#wikipage-referer">@{[&Resource('Referers',escape=>1)]}</a>) if $rl;
    my $cf = 'SuikaWiki/0.9';
    ## Should be support at least:
    ## - 'SuikaWiki/0.9' CRLF
    ## - 'H2H/' ("0.9" / "1.0" / "1.1") CRLF
    ## - "/*" WSP* 'W3C-CSS/' ("1.0" / "2.0") "*/" CRLF
    $cf = $1 if $content =~ s#^(?:/\*\s*|[\#<]\?)?([A-Z][A-Za-z0-9-]+/[0-9.]+(?:[^0-9.\x0D\x0A][^\x0D\x0A]*)?)[\x0D\x0A]+##s;
    if ($cf =~ m!^(?:\#\?)?SuikaWiki/0.9(?:$|\s)!) {
    #print gmtime."Header...\n";
      &print_header ($form{mypage}, -last_modified => $lm, -expires => time + 120,
        -content_format => $cf, -noindex => ($cf =~ /obsoleted="yes"/ ? 1 : 0));
        #print "\n". gmtime."Body...\n";
      &print_content ($content, content_format => $cf, last_modified => $lm,
        -toc => \@toc);
      print &text_to_html (q([[#comment]])) if $cf !~ /obsoleted="yes"/ && !$FixedPage{$form{mypage}};
    } else {
      &print_header($form{mypage}, -expires => time + 120, -last_modified => $lm);
      print "<pre>@{[&escape($content)]}</pre>";
    }
    if ($c) {
      print qq{<h2 @{[&id_and_name('wikipage-see-also')]}>@{[&Resource('SeeAlso',escape=>1)]}</h2>};
      print $r;
    }
    if ($rl) {
      print qq(<div @{[&id_and_name('wikipage-referer')]}><h2>@{[&Resource('Referers',escape=>1)]}</h2>\n$rl</div>\n);
    }
        #print "\n". gmtime."Footer...\n";
  &print_footer($form{mypage}, $lm);
        #print "\n". gmtime."Fin...\n";
}

sub do_output_css {
  wiki::referer::add ($form{mypage}, $ENV{HTTP_REFERER});
  wiki::useragent::add ($ENV{HTTP_USER_AGENT});
  my $content = $database{$form{mypage}};
  if ($content =~ m#^\s*/\*\s*W3C-CSS#) {
    my $lm = gmtime &get_info($form{mypage}, $info_LastModified);
    print "Content-Type: text/css; charset=@{[&get_charset_name($kanjicode)]}\n";
    print "Last-Modified: $lm\n";
    print "Expires: @{[scalar gmtime time+3600]}\n";    ## TODO: don't use asctime
    print "\n";
    print $content;
  } else {
    print "Status: 406 Unsupported Media Type\n";
    &print_header('WikiPageIsNotCSS', -noindex => 1);
    &print_content($database{WikiPageIsNotCSS});
    &print_footer('WikiPageIsNotCSS');
  }
}

sub id_and_name ($) {
    my $name = shift;
    if ($UA =~ m#Mozilla/[12]\.|Microsoft Internet Explorer#) {
      qq{id="$name"><a name="$name"></a};
    } else {
        qq{id="$name"};
    }
}

sub do_edit {
    my ($page) = &unarmor_name(&armor_name($form{mypage}));
    if (not &is_editable($page)) {
        &print_header($page, -noindex => 1, -expires => time+60);
        &print_message(&Resource('Error:ThisPageIsUneditable'));
    } elsif (&is_frozen($page)) {
        &print_header($page, -noindex => 1, -expires => time+60);
        &print_message(&Resource('Error:ThisPageIsUneditable'));
    } else {
        &print_header($page, -noindex => 1, -expires => time+60);
        &print_editform($database{$page}, &get_info($page, $info_LastModified), admin=>0);
    }
    wiki::referer::add ($form{mypage}, $ENV{HTTP_REFERER});
    wiki::useragent::add ($ENV{HTTP_USER_AGENT});
    my ($r, $c) = get_search_result ($form{mypage});
    my $rl = wiki::referer::list_html ($form{mypage});
    if ($c) {
      print qq{<h2 id="wikipage-see-also">@{[&Resource('SeeAlso',escape=>1)]}</h2>};
      print $r;
    }
    if ($rl) {
      print qq(<div id="wikipage-referer"><h2>@{[&Resource('Referers',escape=>1)]}</h2>\n$rl</div>\n);
    }
    &print_footer($page);
}

sub do_adminedit {
    my ($page) = &unarmor_name(&armor_name($form{mypage}));
    &print_header($page, -noindex => 1, -expires => time+60);
    if (not &is_editable($page)) {
        &print_message(&Resource('Error:ThisPageIsUneditable'));
    } else {
        &print_message(&Resource('Error:PasswordIsNotSpecified'));
        &print_editform($database{$page}, &get_info($page, $info_LastModified), admin=>1);
    }
    &print_footer($page);
}

sub do_adminchangepassword {
    if ($form{mynewpassword} ne $form{mynewpassword2}) {
        &print_error(&Resource('Error:PasswordMismatch'));
    }
    my ($validpassword_crypt) = &get_info($PageName{AdminSpecialPage}, 'AdminPassword');
    if ($validpassword_crypt) {
        if (not &valid_password($form{myoldpassword})) {
            &print_error(&Resource('Error:PasswordIsIncorrect'));
        }
    }
    my ($sec, $min, $hour, $day, $mon, $year, $weekday) = localtime(time);
    my (@token) = ('0'..'9', 'A'..'Z', 'a'..'z');
    my $salt1 = $token[(time | $$) % scalar(@token)];
    my $salt2 = $token[($sec + $min*60 + $hour*60*60) % scalar(@token)];
    my $crypted = crypt($form{mynewpassword}, "$salt1$salt2");
    &set_info($PageName{AdminSpecialPage}, 'AdminPassword', $crypted);

    &print_header('CompletedSuccessfully', -noindex => 1);
    &print_message(&Resource('Error:PasswordIsChanged'));
    &print_footer('CompletedSuccessfully');
}

sub valid_password ($) {
    my ($validpassword_crypt) = &get_info($PageName{AdminSpecialPage}, 'AdminPassword');
    return crypt (shift, $validpassword_crypt) eq $validpassword_crypt ? 1 : 0;
}

sub do_write {
    if (&frozen_reject()) {
        return;
    }

    if (not &is_editable($form{mypage})) {
        &print_header($form{mypage}, -noindex => 1);
        &print_message(&Resource('Error:ThisPageIsUneditable'));
        &print_footer($form{mypage});
        return;
    }

    if (&conflict($form{mypage}, $form{mymsg})) {
        return;
    }

    if ($form{mymsg}) {
        if ($form{mytouch} || !ref $database) {
          $database{$form{mypage}} = $form{mymsg};
        } else {
          $database->STORE ($form{mypage} => $form{mymsg}, -touch => 0);
        }
        &set_info($form{mypage}, $info_IsFrozen, 0 + $form{myfrozen});
        my $fragment = '';
        $fragment .= qq(;after_edit_cmd=@{[&encode($form{after_edit_cmd})]}) if $form{after_edit_cmd};
        if ($form{__comment_anchor_index}) {
            $fragment .= qq(#anchor-$form{__comment_anchor_index});
        } elsif ($form{__wikiform_anchor_index}) {
            $fragment .= qq(#wikiform-$form{__wikiform_anchor_index});
        }
        &print_header('CompletedSuccessfully', -noindex => 1, -goto => $url_cgi.'?mycmd='.&encode($form{after_edit_cmd}||'read').';mypage='.&encode($form{mypage}).qq(;x-param=@{[time.[0..9]->[rand 10]]}$fragment));
        &print_message(&Resource('Error:SavedSuccessfully'));
        &print_content(&Resource('Error:ContinueReading')." @{[&armor_name($form{mypage})]}");
        &print_footer('CompletedSuccessfully');
    } else {
        delete $database{$form{mypage}};
        delete $infobase{$form{mypage}};
        &print_header($form{mypage}, -noindex => 1);
        &print_message(&Resource('Error:PageIsDeletedSuccessfully'));
        &print_footer($form{mypage});
    }
}

sub get_search_result ($;%) {
  my $word = lc shift;
  my %option = @_;
  my @r;
  foreach my $page (keys %database) {
    next if !$option{-match_myself} && ($page eq $word);
    my $content = lc $database{$page};
    if (index (lc $page, $word) > -1) {
      my $c = $content =~ s/\Q$word\E//g;
      push @r, [$page, $c+20];
    } elsif (index ($word, lc $page) > -1) {
      my $c = $content =~ s/\Q$word\E//g;
      push @r, [$page, $c+10];
    } elsif (my $c = $content =~ s/\Q$word\E//g) {
      push @r, [$page, $c];
    }
  }
  #my $em = sub { my $s = shift; $s =~ s#(\Q$word\E)#<em>$1</em>#gi; $s };
  my $r = join "\n", map {qq(<li>[$_->[1]] <a href ="$url_cgi?@{[&encode($_->[0])]}" class="wiki">@{[&escape($_->[0])]}</a> <span class="wikipage-summary">@{[&escape(&get_subjectline($_->[0]))]}</span></li>)} sort {$b->[1] <=> $a->[1] || $a->[0] cmp $b->[0]} @r;
  $r = qq|<ul class="search-result">$r</ul>| if $r;
  wantarray? ($r, scalar @r): $r;
}

sub do_random_jump {
  my @list = keys %database;
  my $name = &encode ($list[rand @list]);
  my $scheme = 'http';
  $scheme = lc $1 if $main::ENV{SERVER_PROTOCOL} =~ m#([A-Za-z0-9+.%-]+)#;
  print "Location: $scheme://$main::ENV{SERVER_NAME}:$main::ENV{SERVER_PORT}$url_cgi?$name\n";
  print "\n";
}

sub print_error {
    my ($msg) = @_;
    &print_header($PageName{ErrorPage}, -noindex => 1);
    print qq(<p><strong class="error">$msg</strong></p>);
    &print_footer($PageName{ErrorPage});
    exit(0);
}

sub print_header ($;%) {
    my ($page, %option) = @_;
    my @head;
    $option{body_class} = &is_frozen($page) ? 'frozen' : 'normal';
    $option{body_class} .= " wiki-page-obsoleted" if $option{-content_format} =~ /obsoleted="yes"/;
    if ($option{-goto}) {
      if ($UA =~ m#Opera|MSIE 2\.#) {
          ## WARNING: This code may output unsafe HTML document if
          ##          $option{-goto} is not clean.
          $option{-goto} =~ tr/;/&/ if $UA =~ m#Opera#;
          print qq{Refresh: 0; url=$option{-goto}\n};
          push @head, qq(<meta http-equiv="refresh" content="0; url=$option{-goto}">);
      } else {
          $option{-goto} =~ tr/;/&/ if $UA =~ m#Mozilla/[1-4]\.#;
          print qq{Refresh: 0; url="$option{-goto}"\n};
          push @head, qq(<meta http-equiv="refresh" content="0; url=&quot;@{[&escape($option{-goto})]}&quot;">);
      }
    }
    print qq{Last-Modified: @{[scalar gmtime $option{-last_modified}]}\n} if $option{-last_modified};
    if ($option{-expires}) {
      print qq{Expires: @{[scalar gmtime $option{-expires}]}\n};
    }
    if ($UA =~ m#Mozilla/2#) {
        my $ct = qq{text/html; charset=@{[&get_charset_name($kanjicode,compatible=>1)]}};
        print qq{Content-Type: $ct\n};
        push @head, qq{<meta http-equiv="content-type" content="$ct">};
    } elsif ($UA =~ m#Infomosaic#) {
        print qq{Content-Type: text/html\n};
    } else {
        print qq{Content-Type: text/html; charset=@{[&get_charset_name($kanjicode)]}\n};
    }
    push @head, qq(<title>@{[&escape($page)]}</title>);
    if ($UA !~ m#Mozilla/[1-4]\.# || $UA =~ m#MSIE (?:[4-9]\.|\d\d)#) {
      push @head, qq(<link rel="stylesheet" type="text/css" href="@{[&escape($uri{wiki}.'?mycmd=TEXT_CSS;mypage='.&encode($PageName{DefaultStyleForHTML}).';x-lm='.&get_info($PageName{DefaultStyleForHTML}, $info_LastModified))]}");
    }
    push @head, q(<meta name="ROBOTS" content="NOINDEX">) if $option{-noindex};
    my ($Links, $links) = &make_navigate_links ($page);
    #print $Links;      ## Link: fields
    $links = join "\n", (@head, $links);
    print <<"EOD";
Content-Language: $lang
Content-Style-Type: text/css

<!-- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd"> + RUBY -->
<html lang="$lang" class="$option{body_class}">
<head profile="http://suika.fam.cx/~wakaba/-temp/wiki/wiki?WikiHTMLMetaProfile">
$links
</head>
<body class="$option{body_class}">
EOD
    &print_navigate_links ($page);
    print <<EOD;
<h1 class="header">@{[&escape($page)]}</h1>
EOD
}

sub get_charset_name ($;%) {
    my ($charset, %option) = (lc shift, @_);
    if ($charset =~ 'euc') {
        $charset = $option{compatible} ? 'x-euc-jp' : 'euc-jp';
    } elsif ($charset =~ 'sjis' || $charset =~ 'shift') {
        $charset = $option{compatible} ? 'x-sjis' : 'shift_jis';
    } elsif ($charset =~ 'jis') {
        $charset = 'iso-2022-jp';
    }
    $charset;
}

sub print_navigate_links (@) {
  my ($page) = @_;
  my $editable = (&is_editable($page) && !&is_frozen($page)) ? 1 : 0;
  my $cookedpage = &encode($page);
  print <<EOH;
<div class="tools">
    @{[ $editable
        ? qq(<a title="@{[&Resource('EditThisPageLong',escape=>1)]}" href="$url_cgi?mycmd=edit;mypage=$cookedpage" accesskey="E" class="wiki-cmd">@{[&Resource('EditThisPage',escape=>1)]}</a> | )
        : qq()
    ]}
    <a href="$url_cgi?mycmd=read;mypage=$cookedpage;x-param=@{[time.[0..9]->[rand 10]]}" class="wiki-cmd" title="@{[&Resource('ViewThisPageLong',escape=>1)]}">@{[&Resource('ViewThisPage',escape=>1)]}</a> | 
    <a href="$url_cgi?mycmd=map;mypage=$cookedpage" class="wiki-cmd" title="@{[&Resource('ShowMapOfThisPageLong',escape=>1)]}">@{[&Resource('ShowMapOfThisPage',escape=>1)]}</a> | 
    <a href="$url_cgi?$PageName{CreatePage}" class="wiki" title="@{[&Resource('GoToCreatePageLong',escape=>1)]}">@{[&Resource('GoToCreatePage',escape=>1)]}</a> | 
    <a href="$url_cgi?$PageName{IndexPage}" class="wiki" title="@{[&Resource('GoToIndexPageLong',escape=>1)]}">@{[&Resource('GoToIndexPage',escape=>1)]}</a> | 
    <a href="$url_cgi?$PageName{FrontPage}" class="wiki" title="@{[&Resource('GoToHomePageLong',escape=>1)]}">@{[&Resource('GoToHomePage',escape=>1)]}</a> | 
    <a href="$url_cgi?$PageName{SearchPage}" class="wiki" title="@{[&Resource('GoToSearchPageLong',escape=>1)]}">@{[&Resource('GoToSearchPage',escape=>1)]}</a> | 
    <a href="$url_cgi?mycmd=RandomJump;x-param=@{[time.[0..9]->[rand 10]]}" class="wiki randomlink" title="@{[&Resource('GoSomewhereLong',escape=>1)]}">@{[&Resource('GoSomewhere',escape=>1)]}</a> | 
    <a href="$url_cgi?$PageName{RecentChanges}" class="wiki" title="@{[&Resource('GoToRecentChangesLong',escape=>1)]}">@{[&Resource('GoToRecentChanges',escape=>1)]}</a>
</div>
EOH
}

sub make_navigate_links ($) {
    my $page = shift;
    my @link;
    push @link, {rel=>'edit', href=>"$url_cgi?mycmd=edit;mypage=@{[&encode($page)]}", class=>"wiki-command", title=>&Resource('EditThisPageLink')} if &is_editable ($page) && !&is_frozen ($page);
    push @link, {rel=>'edit', href=>"$url_cgi?mycmd=adminedit;mypage=@{[&encode($page)]}", class=>"wiki-command", title=>&Resource('AdminEditThisPageLink')} if &is_editable ($page) || &is_frozen ($page);
    push @link, {rel=>'view', href=>"$url_cgi?mycmd=read;mypage=@{[&encode($page)]};x-p=@{[time.[0..9]->[rand 10]]}", class=>'wiki-command', title=>&Resource('ViewThisPageLink')};
    push @link, {rel=>'myself', href=>"$url_cgi?@{[&encode($page)]}", class=>'wiki', title=>&Resource('GoToMyselfLink')};
    push @link, {rel=>'index', href=>"$url_cgi?$PageName{IndexPage}", class=>'wiki', title=>&Resource('GoToIndexPageLink')};
    push @link, {rel=>'home', href=>"$url_cgi?$PageName{FrontPage}", class=>'wiki', title=>&Resource('GoToHomePageLink')};
    push @link, {rel=>'News', href=>"$url_cgi?WikiNews", class=>'wiki', title=>&Resource('GoToWikiNewsLink')};
    push @link, {rel=>'News', href=>"$url_cgi?$PageName{RecentChanges}", class=>"wiki", title=>&Resource('GoToRecentChangesLink')};
    push @link, {rel=>'News', href=>"$url_cgi?$PageName{RssPage}", class=>"wiki", title=>&Resource('GoToRssPageLink'), type=>'application/xml'};
    push @link, {rel=>'search', href=>"$url_cgi?$PageName{SearchPage}", class=>'wiki', title=>&Resource('GoToSearchPageLink')};
    push @link, {rel=>'help', href=>"$url_cgi?WikiHelp", class=>'wiki', title=>&Resource('GoToWikiHelpLink')};
    push @link, {rel=>'copyright', href=>"$url_cgi?WikiPageLicense", class=>'wiki', title=>&Resource('GoToWikiPageLicenseLink')};
    push @link, {rel=>'jump', href=>qq(javascript:var%20WikiName=prompt('Please%20input%20the%20WikiName:','','Jump%20to%20SuikaWiki');if(WikiName)%7B_content.location.href='$url_cgi%3F'+encodeURIComponent(WikiName)%7D), class=>'wiki-cmd', title=>&Resource('JumpToLink')};
    push @link, {rel=>'jump', href=>qq(javascript:var%20WikiName=prompt('Please%20input%20the%20WikiName:','','Jump%20to%20SuikaWiki');if(WikiName)%7B_content.location.href='$url_cgi%3Fmycmd=edit;mypage='+encodeURIComponent(WikiName)%7D), class=>'wiki-cmd', title=>&Resource('JumpToEditLink')};
    push @link, {rel=>'lucky', href=>"$url_cgi?mycmd=RandomJump;x-param=@{[time.[0..9]->[rand 10]]}", class=>'wiki randomlink', title=>&Resource('GoSomewhereLink')};
    push @link, {rel=>'history', href=>$uri{cvs_wikipage}.do{my $s=$page;$s=~s/(.)/sprintf '%02X', ord $1/ges;$s}.'.txt', title=>&Resource('ViewHistoryOfThisPageLink'),hreflang=>'en'} if $uri{cvs_wikipage};
    push @link, {rel=>'history', href=>"$url_cgi?mycmd=diff;mypage=@{[&encode($page)]}", title=>&Resource('ViewDiffOfThisPageLink'), class=>'wiki-command'} if $wiki::diff::UseDiff;
    push @link, {rel=>'contents', href=>"$url_cgi?mycmd=map;mypage=@{[&encode($page)]}", title=>&Resource('ShowMapOfThisPageLink'), class=>'wiki-command'};
    my ($Links, $links) = ('', '');
    for my $e (@link) {
        $links .= qq(<link);
        $Links .= qq(Link: <$e->{href}>);
        for my $attr (qw/rel rev href title class type hreflang charset/) {
            $links .= qq( $attr="@{[&escape($e->{$attr})]}") if $e->{$attr};
        }
        for my $attr (qw/rel rev title/) {
            $Links .= qq(; $attr="@{[do{$e->{$attr} =~ s/([\\\"])/\\$1/g; $e->{$attr}}]}") if $e->{$attr};
        }
        $links .= qq(>\n);
        $Links .= qq(\n);
    }
    wantarray ? ($Links, $links) : $Links;
}

sub print_footer {
    my ($page, $lm) = @_;
    my $epage = &encode ($page);
  my $cvslog1 = q$Revision: 1.44 $;
  my $cvslog2 = q$Date: 2003/01/01 12:30:24 $;
  print_navigate_links ($page);
  print <<"EOD";
@{[ $lm ? qq(<div id="wikipage-last-modified">@{[&Resource('LastModified=',escape=>1)]}@{[&_rfc3339_date ($lm)]}</div>) : '' ]}
<div class="footer">
<a href="http://www.hyuki.com/yukiwiki/" title="YukiWiki 2.0.beta1.2002-05-29 &copy; 2000-2002 by Hiroshi Yuki">@{[&Resource('About:Name:YukiWiki',escape=>1)]}</a> <a href="http://digit.que.ne.jp/work/" title="WalWiki 2.0.beta1.wal.1 &copy; 2000-2002 by Makio Tsukamoto">@{[&Resource('About:Name:WalWiki',escape=>1)]}</a>
<a href="/gate/cvs/wakaba/wiki/" title="@{[&Resource('About:SuikaWiki:JumpToCVS',escape=>1)]} ($cvslog2)">@{[&Resource('About:Name:SuikaWiki',escape=>1)]} $cvslog1</a>
</div>
</body>
</html>
EOD
}

sub escape {
    my $s = shift;
    $s =~ s|\r\n|\n|g;
    $s =~ s|&|&amp;|g;
    $s =~ s|<|&lt;|g;
    $s =~ s|>|&gt;|g;
    $s =~ s|"|&quot;|g;
    return $s;
}

sub unescape {
    my $s = shift;
    # $s =~ s|\n|\r\n|g;
    $s =~ s|&lt;|<|g;
    $s =~ s|&gt;|>|g;
    $s =~ s|&quot;|"|g;
    $s =~ s|&amp;|&|g;
    return $s;
}

sub print_content ($;$) {
    my ($rawcontent, %option) = @_;
    print &text_to_html($rawcontent, toc=>1, %option);
}

sub text_to_html {
    my ($txt, %option) = @_;
    my @toc;
    my @toc2 = @{$option{-toc}||[]};
    my $tocnum = 0;
    
    ## Load constants
    my %const;
    if ($option{content_format} =~ /import="([^"]+)"/) {
      for (split /\s*,\s*/, $1) {
        my $wp = $database{$_};
        if ($wp =~ m!^\#\?SuikaWikiConst/1.0!) {
          wiki::suikawikiconst::to_hash ($wp => \%const);
        }
      }
    }
    
    $txt =~ s{__&&([^&]+)&&__}{defined $const{$1}?$const{$1}:qq(__&&$1&&__)}ge;
    my (@txt) = split(/\n/, $txt);
    my (@saved, @result);
    unshift(@saved, "</p>");
    push(@result, "<p>");
    foreach (@txt) {
        chomp;
        if (/^\*\*\*\*\*([^\x0D\x0A]*)/) {
            push(@toc, qq(----- <a href="#i$tocnum">@{[&escape($1)||$tocnum]}</a>\n));
            push(@result, splice(@saved), qq(<h6 @{[&id_and_name("i$tocnum")]}>) . &inline($1, const => \%const) . '</h6>');
            $tocnum++;
        } elsif (/^\*\*\*\*([^\x0D\x0A]*)/) {
            push(@toc, qq(---- <a href="#i$tocnum">@{[&escape($1)||$tocnum]}</a>\n));
            push(@result, splice(@saved), qq(<h5 @{[&id_and_name("i$tocnum")]}>) . &inline($1, const => \%const) . '</h5>');
            $tocnum++;
        } elsif (/^\*\*\*([^\x0D\x0A]*)/) {
            push(@toc, qq(--- <a href="#i$tocnum">@{[&escape($1)||$tocnum]}</a>\n));
            push(@result, splice(@saved), qq(<h4 @{[&id_and_name("i$tocnum")]}>) . &inline($1, const => \%const) . '</h4>');
            $tocnum++;
        } elsif (/^\*\*([^\x0D\x0A]*)/) {
        # if (/^\*\*(.*)/) {
        # Walrus mod (6) end
            push(@toc, qq(-- <a href="#i$tocnum">@{[&escape($1)||$tocnum]}</a>\n));
            push(@result, splice(@saved), qq(<h3 @{[&id_and_name("i$tocnum")]}>) . &inline($1, const => \%const) . '</h3>');
            $tocnum++;
        } elsif (/^\*([^\x0D\x0A]*)/) {
            push(@toc, qq(- <a href="#i$tocnum">@{[&escape($1)||$tocnum]}</a>\n));
            push(@result, splice(@saved), qq(<h2 @{[&id_and_name("i$tocnum")]}>) . &inline($1, const => \%const) . '</h2>');
            $tocnum++;
        } elsif (/^(={1,6})(.*)/) {
            &back_push('ol', length($1), \@saved, \@result);
            push(@result, '<li>' . &inline($2, const => \%const) . '</li>');
        } elsif (/^(-{1,6})(.*)/) {
          &back_push('ul', length($1), \@saved, \@result);
          my ($pf, $l) = ('', $2);
          if (!$main::_EMBEDED && $l =~ s/^\s*\[([0-9]+)\]//) {
            my $num = 0+$1;
            $pf = qq(<a name="anchor-$num" id="anchor-$num" class="anchor">[$num]</a>);
          }
          push(@result, '<li>' . $pf . &inline ($l, const => \%const) . '</li>');
        } elsif (/^:([^:]+):(.*)/) {
            &back_push('dl', 1, \@saved, \@result);
            push(@result, '<dt>' . &inline($1, const => \%const) . '</dt>', '<dd>' . &inline($2, const => \%const) . '</dd>');
        } elsif (/^(?!>>\d)(>{1,5})(.*)/) {
            &back_push('blockquote', length($1), \@saved, \@result);
            push @result, "<p>";
            push(@result, &inline($2, const => \%const));
            unshift @saved, "</p>";
        } elsif (/^\s*$/) {
            push(@result, splice(@saved));
            push(@result, "<p>");
            unshift(@saved, "</p>");
        } elsif (/^(\s+.*)$/) {
            &back_push('pre', 1, \@saved, \@result);
            push(@result, &inline($1, const => \%const));
        } elsif (/^\,(.*?)[\x0D\x0A]*$/) {
            &back_push('table', 1, \@saved, \@result);
            #######
            # This part is taken from Mr. Ohzaki's Perl Memo and Makio Tsukamoto's WalWiki.
            # XXXXX
            my $tmp = "$1,";
            my @value = map {/^"(.*)"$/ ? scalar($_ = $1, s/""/"/g, $_) : $_} ($tmp =~ /("[^"]*(?:""[^"]*)*"|[^,]*),/g);
            my @align = map {(s/^\s+//) ? ((s/\s+$//) ? ' align="center"' : ' align="right"') : ''} @value;
            my @colspan = map {($_ eq '==') ? 0 : 1} @value;
            for (my $i = 0; $i < @value; $i++) {
                if ($colspan[$i]) {
                    while ($i + $colspan[$i] < @value and $value[$i + $colspan[$i]] eq '==') {
                        $colspan[$i]++;
                    }
                    $colspan[$i] = ($colspan[$i] > 1) ? sprintf(' colspan="%d"', $colspan[$i]) : '';
                    $value[$i] = sprintf('<td%s%s>%s</td>', $align[$i], $colspan[$i], &inline($value[$i], const => \%const));
                } else {
                    $value[$i] = '';
                }
            }
            push(@result, join('', '<tr>', @value, '</tr>'));
            # XXXXX
            #######
        } elsif (/^\[(INS|DEL|PRE)\[\s*$/) {
            push @result, splice (@saved), '<'.lc($1).'>';
            unshift @saved, "</p>";
            push @result, "<p>";
        } elsif (/^\](INS|DEL|PRE)\]\s*$/) {
            push @result, splice (@saved), '</'.lc($1).'>';
        } elsif (/^\[([0-9]+)\](.*)$/ && !$main::_EMBEDED) {
          my $num = 0+$1;
          push @result, qq(<a name="anchor-$num" id="anchor-$num" class="anchor">[$num]</a>);
          push @result, &inline ($2, const => \%const);
        } else {
            push(@result, &inline($_, const => \%const));
        }
    }
    push(@result, splice(@saved));
    
    my $toc = '';
    if ($option{toc}) {
        # Convert @toc (table of contents) to HTML.
        # This part is taken from Makio Tsukamoto's WalWiki.
        my (@tocsaved, @tocresult);
        foreach (@toc,@toc2) {
            if (/^(-{1,6})(.*)$/) {
                &back_push('ul', length($1), \@tocsaved, \@tocresult);
                push(@tocresult, '<li>' . $2 . '</li>');
            }
        }
        push(@tocresult, splice(@tocsaved));
        $toc = join("\n", @tocresult);
        $toc = $toc ? qq(<div id="wikipage-toc">$toc</div>) : '';
    }
    $toc .= join("\n", @result);
    $toc =~ s#<p>\n</p>##g;
    $toc =~ s#[\x0D\x0A]+</#</#g;
    $toc =~ s#<pre>\n#<pre>#g;
    $toc;
}

sub back_push {
    my ($tag, $level, $savedref, $resultref, $attr) = @_;
    while (@$savedref > $level) {
        push(@$resultref, shift(@$savedref));
    }
    if ($savedref->[0] ne "</$tag>") {
        push(@$resultref, splice(@$savedref));
    }
    while (@$savedref < $level) {
        unshift(@$savedref, "</$tag>");</