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Upgraded Markdown renderer to latest version: 1.0.1 (loads of fixes)

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This commit is contained in:
thepurpleblob
2005-04-11 14:08:01 +00:00
parent 1e097367df
commit 9af891b3bb
1 changed files with 228 additions and 250 deletions
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lib/markdown.php
+228 -250
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@@ -6,20 +6,19 @@
# Copyright (c) 2004 John Gruber
# <http://daringfireball.net/projects/markdown/>
#
# Copyright (c) 2004 Michel Fortin - Translation to PHP
# Copyright (c) 2004 Michel Fortin - PHP Port
# <http://www.michelf.com/projects/php-markdown/>
#
global $MarkdownPHPVersion, $MarkdownSyntaxVersion,
$md_empty_element_suffix, $md_tab_width,
$md_nested_brackets_depth, $md_nested_brackets,
$md_escape_table, $md_backslash_escape_table;
$md_escape_table, $md_backslash_escape_table,
$md_list_level;
$MarkdownPHPVersion = '1.0'; # Sat 21 Aug 2004
$MarkdownSyntaxVersion = '1.0'; # Fri 20 Aug 2004
$MarkdownPHPVersion = '1.0.1'; # Fri 17 Dec 2004
$MarkdownSyntaxVersion = '1.0.1'; # Sun 12 Dec 2004
#
@@ -34,7 +33,7 @@ $md_tab_width = 4;
Plugin Name: Markdown
Plugin URI: http://www.michelf.com/projects/php-markdown/
Description: <a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>
Version: 1.0
Version: 1.0.1
Author: Michel Fortin
Author URI: http://www.michelf.com/
*/
@@ -49,6 +48,7 @@ if (isset($wp_version)) {
add_filter('comment_text', 'Markdown', 6);
}
# -- bBlog Plugin Info --------------------------------------------------------
function identify_modifier_markdown() {
global $MarkdownPHPVersion;
@@ -109,7 +109,10 @@ $md_escape_table = array(
"]" => md5("]"),
"(" => md5("("),
")" => md5(")"),
">" => md5(">"),
"#" => md5("#"),
"+" => md5("+"),
"-" => md5("-"),
"." => md5("."),
"!" => md5("!")
);
@@ -157,10 +160,6 @@ function Markdown($text) {
# Strip link definitions, store in hashes.
$text = _StripLinkDefinitions($text);
# _EscapeSpecialChars() must be called very early, to get
# backslash escapes processed.
$text = _EscapeSpecialChars($text);
$text = _RunBlockGamut($text);
$text = _UnescapeSpecialChars($text);
@@ -174,9 +173,12 @@ function _StripLinkDefinitions($text) {
# Strips link definitions from text, stores the URLs and titles in
# hash references.
#
global $md_tab_width;
$less_than_tab = $md_tab_width - 1;
# Link defs are in the form: ^[id]: url "optional title"
$text = preg_replace_callback('{
^[ \t]*\[(.+)\]: # id = $1
^[ ]{0,'.$less_than_tab.'}\[(.+)\]: # id = $1
[ \t]*
\n? # maybe *one* newline
[ \t]*
@@ -185,7 +187,7 @@ function _StripLinkDefinitions($text) {
\n? # maybe one newline
[ \t]*
(?:
# Todo: Titles are delimited by "quotes" or (parens).
(?<=\s) # lookbehind for whitespace
["(]
(.+?) # title = $3
[")]
@@ -202,12 +204,15 @@ function _StripLinkDefinitions_callback($matches) {
$link_id = strtolower($matches[1]);
$md_urls[$link_id] = _EncodeAmpsAndAngles($matches[2]);
if (isset($matches[3]))
$md_titles[$link_id] = htmlentities($matches[3]);
$md_titles[$link_id] = str_replace('"', '&quot;', $matches[3]);
return ''; # String that will replace the block
}
function _HashHTMLBlocks($text) {
global $md_tab_width;
$less_than_tab = $md_tab_width - 1;
# Hashify HTML blocks:
# We only want to do this for block-level HTML tags, such as headers,
# lists, and tables. That's because we still want to wrap <p>s around
@@ -270,17 +275,39 @@ function _HashHTMLBlocks($text) {
\A\n? # the beginning of the doc
)
( # save in $1
[ \t]*
[ ]{0,'.$less_than_tab.'}
<(hr) # start tag = $2
\b # word break
([^<>])*? #
/?> # the matching end tag
[ \t]*
(?=\n{2,}|\Z) # followed by a blank line or end of document
)
}x',
'_HashHTMLBlocks_callback',
$text);
# Special case for standalone HTML comments:
$text = preg_replace_callback('{
(?:
(?<=\n\n) # Starting after a blank line
| # or
\A\n? # the beginning of the doc
)
( # save in $1
[ ]{0,'.$less_than_tab.'}
(?s:
<!
(--.*?--\s*)+
>
)
[ \t]*
(?=\n{2,}|\Z) # followed by a blank line or end of document
)
}x',
'_HashHTMLBlocks_callback',
$text);
return $text;
}
function _HashHTMLBlocks_callback($matches) {
@@ -303,9 +330,9 @@ function _RunBlockGamut($text) {
# Do Horizontal Rules:
$text = preg_replace(
array('/^( ?\* ?){3,}$/m',
'/^( ?- ?){3,}$/m',
'/^( ?_ ?){3,}$/m'),
array('{^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$}mx',
'{^[ ]{0,2}([ ]? -[ ]?){3,}[ \t]*$}mx',
'{^[ ]{0,2}([ ]? _[ ]?){3,}[ \t]*$}mx'),
"\n<hr$md_empty_element_suffix\n",
$text);
@@ -315,9 +342,6 @@ function _RunBlockGamut($text) {
$text = _DoBlockQuotes($text);
# Make links out of things like `<http://example.com/>`
$text = _DoAutoLinks($text);
# We already ran _HashHTMLBlocks() before, in Markdown(), but that
# was to escape raw HTML in the original Markdown source. This time,
# we're escaping the markup we've just created, so that we don't wrap
@@ -336,16 +360,23 @@ function _RunSpanGamut($text) {
# tags like paragraphs, headers, and list items.
#
global $md_empty_element_suffix;
$text = _DoCodeSpans($text);
# Fix unencoded ampersands and <'s:
$text = _EncodeAmpsAndAngles($text);
$text = _EscapeSpecialChars($text);
# Process anchor and image tags. Images must come first,
# because ![foo][f] looks like an anchor.
$text = _DoImages($text);
$text = _DoAnchors($text);
# Make links out of things like `<http://example.com/>`
# Must come after _DoAnchors(), because you can use < and >
# delimiters in inline links like [this](<url>).
$text = _DoAutoLinks($text);
# Fix unencoded ampersands and <'s:
$text = _EncodeAmpsAndAngles($text);
$text = _DoItalicsAndBold($text);
@@ -420,7 +451,7 @@ function _DoAnchors($text) {
\\]
\\( # literal paren
[ \\t]*
<?(.+?)>? # href = $3
<?(.*?)>? # href = $3
[ \\t]*
( # $4
(['\"]) # quote char = $5
@@ -467,10 +498,10 @@ function _DoAnchors_reference_callback($matches) {
}
function _DoAnchors_inline_callback($matches) {
global $md_escape_table;
$whole_match = $matches[1];
$link_text = $matches[2];
$url = $matches[3];
$title = $matches[6];
$whole_match = $matches[1];
$link_text = $matches[2];
$url = $matches[3];
$title =& $matches[6];
# We've got to encode these to avoid conflicting with italics/bold.
$url = str_replace(array('*', '_'),
@@ -478,7 +509,7 @@ function _DoAnchors_inline_callback($matches) {
$url);
$result = "<a href=\"$url\"";
if (isset($title)) {
$title = str_replace('"', '&quot', $title);
$title = str_replace('"', '&quot;', $title);
$title = str_replace(array('*', '_'),
array($md_escape_table['*'], $md_escape_table['_']),
$title);
@@ -577,12 +608,12 @@ function _DoImages_reference_callback($matches) {
}
function _DoImages_inline_callback($matches) {
global $md_empty_element_suffix, $md_escape_table;
$whole_match = $matches[1];
$alt_text = $matches[2];
$url = $matches[3];
$title = '';
$whole_match = $matches[1];
$alt_text = $matches[2];
$url = $matches[3];
$title = '';
if (isset($matches[6])) {
$title = $matches[6];
$title = $matches[6];
}
$alt_text = str_replace('"', '&quot;', $alt_text);
@@ -613,8 +644,8 @@ function _DoHeaders($text) {
# --------
#
$text = preg_replace(
array("/(.+)[ \t]*\n=+[ \t]*\n+/e",
"/(.+)[ \t]*\n-+[ \t]*\n+/e"),
array('{ ^(.+)[ \t]*\n=+[ \t]*\n+ }emx',
'{ ^(.+)[ \t]*\n-+[ \t]*\n+ }emx'),
array("'<h1>'._RunSpanGamut(_UnslashQuotes('\\1')).'</h1>\n\n'",
"'<h2>'._RunSpanGamut(_UnslashQuotes('\\1')).'</h2>\n\n'"),
$text);
@@ -645,7 +676,7 @@ function _DoLists($text) {
#
# Form HTML ordered (numbered) and unordered (bulleted) lists.
#
global $md_tab_width;
global $md_tab_width, $md_list_level;
$less_than_tab = $md_tab_width - 1;
# Re-usable patterns to match list item bullets and number markers:
@@ -653,27 +684,45 @@ function _DoLists($text) {
$marker_ol = '\d+[.]';
$marker_any = "(?:$marker_ul|$marker_ol)";
$text = preg_replace_callback("{
( # $1
( # $2
^[ ]{0,$less_than_tab}
($marker_any) # $3 - first list item marker
[ \\t]+
# Re-usable pattern to match any entirel ul or ol list:
$whole_list = '
( # $1 = whole list
( # $2
[ ]{0,'.$less_than_tab.'}
('.$marker_any.') # $3 = first list item marker
[ \t]+
)
(?s:.+?)
( # $4
\z
|
\n{2,}
(?=\S)
(?! # Negative lookahead for another list item marker
[ \t]*
'.$marker_any.'[ \t]+
)
(?s:.+?)
( # $4
\\z
|
\\n{2,}
(?=\\S)
(?! # Negative lookahead for another list item marker
[ \\t]*
{$marker_any}[ \\t]+
)
)
)
}xm",
'_DoLists_callback', $text);
)
)
'; // mx
# We use a different prefix before nested lists than top-level lists.
# See extended comment in _ProcessListItems().
if ($md_list_level) {
$text = preg_replace_callback('{
^
'.$whole_list.'
}mx',
'_DoLists_callback', $text);
}
else {
$text = preg_replace_callback('{
(?:(?<=\n\n)|\A\n?)
'.$whole_list.'
}mx',
'_DoLists_callback', $text);
}
return $text;
}
@@ -684,17 +733,46 @@ function _DoLists_callback($matches) {
$marker_any = "(?:$marker_ul|$marker_ol)";
$list = $matches[1];
$list_type = preg_match('/[*+-]/', $matches[3]) ? "ul" : "ol";
$list_type = preg_match("/$marker_ul/", $matches[3]) ? "ul" : "ol";
# Turn double returns into triple returns, so that we can make a
# paragraph for the last item in a list, if necessary:
$list = preg_replace("/\n{2,}/", "\n\n\n", $list);
$result = _ProcessListItems($list, $marker_any);
$result = "<$list_type>\n" . $result . "</$list_type>\n\n";
$result = "<$list_type>\n" . $result . "</$list_type>\n";
return $result;
}
function _ProcessListItems($list_str, $marker_any) {
#
# Process the contents of a single ordered or unordered list, splitting it
# into individual list items.
#
global $md_list_level;
# The $md_list_level global keeps track of when we're inside a list.
# Each time we enter a list, we increment it; when we leave a list,
# we decrement. If it's zero, we're not in a list anymore.
#
# We do this because when we're not inside a list, we want to treat
# something like this:
#
# I recommend upgrading to version
# 8. Oops, now this line is treated
# as a sub-list.
#
# As a single paragraph, despite the fact that the second line starts
# with a digit-period-space sequence.
#
# Whereas when we're inside a list (or sub-list), that line will be
# treated as the start of a sub-list. What a kludge, huh? This is
# an aspect of Markdown's syntax that's hard to parse perfectly
# without resorting to mind-reading. Perhaps the solution is to
# change the syntax rules such that sub-lists must start with a
# starting cardinal number; e.g. "1." or "a.".
$md_list_level++;
# trim trailing blank lines:
$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
@@ -708,16 +786,16 @@ function _ProcessListItems($list_str, $marker_any) {
}xm',
'_ProcessListItems_callback', $list_str);
$md_list_level--;
return $list_str;
}
function _ProcessListItems_callback($matches) {
$item = $matches[4];
$leading_line = $matches[1];
$leading_space = $matches[2];
$leading_line =& $matches[1];
$leading_space =& $matches[2];
if ($leading_line || preg_match('/\n{2,}/', $item)) {
$item = _RunBlockGamut(_Outdent($item));
#$item =~ s/\n+/\n/g;
}
else {
# Recursion for sub-lists:
@@ -753,7 +831,7 @@ function _DoCodeBlocks_callback($matches) {
$codeblock = $matches[1];
$codeblock = _EncodeCode(_Outdent($codeblock));
$codeblock = _Detab($codeblock);
// $codeblock = _Detab($codeblock);
# trim leading newlines and trailing whitespace
$codeblock = preg_replace(array('/\A\n+/', '/\s+\z/'), '', $codeblock);
@@ -834,7 +912,7 @@ function _EncodeCode($_) {
function _DoItalicsAndBold($text) {
# <strong> must go first:
$text = preg_replace('{ (\*\*|__) (?=\S) (.+?) (?<=\S) \1 }sx',
$text = preg_replace('{ (\*\*|__) (?=\S) (.+?[*_]*) (?<=\S) \1 }sx',
'<strong>\2</strong>', $text);
# Then <em>:
$text = preg_replace('{ (\*|_) (?=\S) (.+?) (?<=\S) \1 }sx',
@@ -890,7 +968,6 @@ function _FormParagraphs($text) {
$text = preg_replace(array('/\A\n+/', '/\n+\z/'), '', $text);
$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
$count = count($grafs);
#
# Wrap <p> tags.
@@ -952,6 +1029,7 @@ function _DoAutoLinks($text) {
# Email addresses: <[email protected]>
$text = preg_replace('{
<
(?:mailto:)?
(
[-.\w]+
\@
@@ -1015,46 +1093,43 @@ function _UnescapeSpecialChars($text) {
}
# Tokenize_HTML is shared between PHP Markdown and PHP SmartyPants.
# _TokenizeHTML is shared between PHP Markdown and PHP SmartyPants.
# We only define it if it is not already defined.
if (!function_exists('_TokenizeHTML')) {
function _TokenizeHTML($str) {
#
# Parameter: String containing HTML markup.
# Returns: An array of the tokens comprising the input
# string. Each token is either a tag (possibly with nested,
# tags contained therein, such as <a href="<MTFoo>">, or a
# run of text between tags. Each element of the array is a
# two-element array; the first is either 'tag' or 'text';
# the second is the actual value.
#
#
# Regular expression derived from the _tokenize() subroutine in
# Brad Choate's MTRegex plugin.
# <http://www.bradchoate.com/past/mtregex.php>
#
$index = 0;
$tokens = array();
if (!function_exists('_TokenizeHTML')) :
function _TokenizeHTML($str) {
#
# Parameter: String containing HTML markup.
# Returns: An array of the tokens comprising the input
# string. Each token is either a tag (possibly with nested,
# tags contained therein, such as <a href="<MTFoo>">, or a
# run of text between tags. Each element of the array is a
# two-element array; the first is either 'tag' or 'text';
# the second is the actual value.
#
#
# Regular expression derived from the _tokenize() subroutine in
# Brad Choate's MTRegex plugin.
# <http://www.bradchoate.com/past/mtregex.php>
#
$index = 0;
$tokens = array();
$depth = 6;
$nested_tags = str_repeat('(?:<[a-z\/!$](?:[^<>]|',$depth)
.str_repeat(')*>)', $depth);
$match = "(?s:<!(?:--.*?--\s*)+>)|". # comment
"(?s:<\?.*?\?>)|". # processing instruction
"$nested_tags"; # nested tags
$match = '(?s:<!(?:--.*?--\s*)+>)|'. # comment
'(?s:<\?.*?\?>)|'. # processing instruction
'(?:</?[\w:$]+\b(?>[^"\'>]+|"[^"]*"|\'[^\']*\')*>)'; # regular tags
$parts = preg_split("/($match)/", $str, -1, PREG_SPLIT_DELIM_CAPTURE);
$parts = preg_split("{($match)}", $str, -1, PREG_SPLIT_DELIM_CAPTURE);
foreach ($parts as $part) {
if (++$index % 2 && $part != '')
array_push($tokens, array('text', $part));
else
array_push($tokens, array('tag', $part));
}
return $tokens;
foreach ($parts as $part) {
if (++$index % 2 && $part != '')
array_push($tokens, array('text', $part));
else
array_push($tokens, array('tag', $part));
}
return $tokens;
}
endif;
function _Outdent($text) {
@@ -1068,14 +1143,30 @@ function _Outdent($text) {
function _Detab($text) {
#
# Inspired from a post by Bart Lateur:
# <http://www.nntp.perl.org/group/perl.macperl.anyperl/154>
# Replace tabs with the appropriate amount of space.
#
global $md_tab_width;
$text = preg_replace(
"/(.*?)\t/e",
"'\\1'.str_repeat(' ', $md_tab_width - strlen('\\1') % $md_tab_width)",
$text);
# For each line we separate the line in blocks delemited by
# tab characters. Then we reconstruct the line adding the appropriate
# number of space charcters.
$lines = explode("\n", $text);
$text = "";
foreach ($lines as $line) {
# Split in blocks.
$blocks = explode("\t", $line);
# Add each blocks to the line.
$line = $blocks[0];
unset($blocks[0]); # Do not add first block twice.
foreach ($blocks as $block) {
# Calculate amount of space, insert spaces, insert block.
$amount = $md_tab_width - strlen($line) % $md_tab_width;
$line .= str_repeat(" ", $amount) . $block;
}
$text .= "$line\n";
}
return $text;
}
@@ -1132,152 +1223,22 @@ expected; (3) the output Markdown actually produced.
Version History
---------------
1.0: Sat 21 Aug 2004
See the readme file for detailed release notes for this version.
* Fixed a couple of bugs in _DoLists() and _ProcessListItems() that
caused unordered lists starting with `+` or `-` to be turned into
*ordered* lists.
1.0.1 - 17 Dec 2004
* Added to the list of block-level HTML tags:
noscript, form, fieldset, iframe, math
* Fixed an odd bug where, with input like this:
> This line starts the blockquote
* This list is part of the quote.
* Second item.
This paragraph is not part of the blockquote.
The trailing paragraph was incorrectly included in the
blockquote. (The solution was to add an extra "\n" after
lists.)
* The contents of `<pre>` tags inside `<blockquote>` are no longer
indented in the HTML output.
* PHP Markdown can now be used as a modifier by the Smarty
templating engine. Rename the file to "modifier.markdown.php"
and put it in your smarty plugins folder.
* Now works as a bBlog formatter. Rename the file to
"modifier.markdown.php" and place it in the "bBlog_plugins"
folder.
1.0fc1: Wed 8 Jul 2004
* Greatly simplified the rules for code blocks. No more colons
necessary; if it's indented (4 spaces or 1 tab), it's a code block.
* Unordered list items can now be denoted by any of the following
bullet markers: [*+-]
* Replacing `"` with `&quot;` to fix literal quotes within title
attributes.
1.0b9: Sun 27 Jun 2004
* Replacing `"` with `&quot;` to fix literal quotes within img alt
attributes.
1.0b8: Wed 23 Jun 2004
* In WordPress, solved a bug where PHP Markdown did not deactivate
the paragraph filter, converting all returns to a line break.
The "texturize" filter was being disabled instead.
* Added 'math' tags to block-level tag patterns in `_HashHTMLBlocks()`.
Please disregard all the 'math'-tag related items in 1.0b7.
* Commented out some vestigial code in `_EscapeSpecialChars()`
1.0b7: Sat 12 Jun 2004
* Added 'math' to `$tags_to_skip` pattern, for MathML users.
* Tweaked regex for identifying HTML entities in
`_EncodeAmpsAndAngles()`, so as to allow for the very long entity
names used by MathML. (Thanks to Jacques Distler for the patch.)
* Changed the internals of `_TokenizeHTML` to lower the PHP version
requirement to PHP 4.0.5.
1.0b6: Sun 6 Jun 2004
* Added a WordPress plugin interface. This means that you can
directly put the "markdown.php" file into the "wp-content/plugins"
directory and then activate it from the administrative interface.
* Added a Textile compatibility interface. Rename this file to
"classTextile.php" and it can replace Textile anywhere.
* The title attribute of reference-style links were ignored.
This is now fixed.
* Changed internal variables names so that they begin with `md_`
instead of `g_`. This should reduce the risk of name collision with
other programs.
1.0b5: Sun 2 May 2004
* Workaround for supporting `<ins>` and `<del>` as block-level tags.
This only works if the start and end tags are on lines by
themselves.
* Three or more underscores can now be used for horizontal rules.
* Lines containing only whitespace are trimmed from blockquotes.
* You can now optionally wrap URLs with angle brackets -- like so:
`<http://example.com>` -- in link definitions and inline links and
images.
* `_` and `*` characters in links and images are no longer escaped
as HTML entities. Instead, we use the ridiculous but effective MD5
hashing trick that's used to hide these characters elsewhere. The
end result is that the HTML output uses the literal `*` and `_`
characters, rather than the ugly entities.
* Passing an empty string to the Markdown function no longer creates
an empty paragraph.
* Added a global declaration at the beginning of the file. This
means you can now `include 'markdown.php'` from inside a function.
1.0b4.1: Sun 4 Apr 2004
* Fixed a bug where image tags did not close.
* Fixed a bug where brakets `[]` inside a link caused the link to be
ignored. PHP Markdown support only 6 (!) level of brakets inside a link
(while John's original version of Markdown in Perl support much more).
1.0b4: Sat 27 Mar 2004
* First release of PHP Markdown, based on the 1.0b4 release.
1.0 - 21 Aug 2004
Author & Contributors
---------------------
Original version by John Gruber
Original Perl version by John Gruber
<http://daringfireball.net/>
PHP translation by Michel Fortin
PHP port and other contributions by Michel Fortin
<http://www.michelf.com/>
First WordPress plugin interface written by Matt Mullenweg
<http://photomatt.net/>
Copyright and License
---------------------
@@ -1286,19 +1247,36 @@ Copyright (c) 2004 Michel Fortin
<http://www.michelf.com/>
All rights reserved.
Copyright (c) 2003-2004 John Gruber
<http://daringfireball.net/>
Copyright (c) 2003-2004 John Gruber
<http://daringfireball.net/>
All rights reserved.
Markdown 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.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
Markdown 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.
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name "Markdown" nor the names of its contributors may
be used to endorse or promote products derived from this software
without specific prior written permission.
This software is provided by the copyright holders and contributors "as
is" and any express or implied warranties, including, but not limited
to, the implied warranties of merchantability and fitness for a
particular purpose are disclaimed. In no event shall the copyright owner
or contributors be liable for any direct, indirect, incidental, special,
exemplary, or consequential damages (including, but not limited to,
procurement of substitute goods or services; loss of use, data, or
profits; or business interruption) however caused and on any theory of
liability, whether in contract, strict liability, or tort (including
negligence or otherwise) arising in any way out of the use of this
software, even if advised of the possibility of such damage.
*/
?>