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<?php // vi: set fenc=utf-8 ts=4 sw=4 et:
/*
* Copyright (C) 2015 Nicolas Grekas - p@tchwork.com
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the (at your option):
* Apache License v2.0 (see provided LICENCE.ASL20 file), or
* GNU General Public License v2.0 (see provided LICENCE.GPLv2 file).
*/
/*
*
* This class shrinks Javascript code
* (a process called minification nowdays)
*
* Should work with most valid Javascript code,
* even when semi-colons are missing.
*
* Features:
* - Removes comments and white spaces.
* - Renames every local vars, typically to a single character.
* - Renames also global vars, methods and properties, but only if they
* are marked special by some naming convention. By default, special
* var names begin with one or more "$", or with a single "_".
* - Renames also local/global vars found in strings,
* but only if they are marked special.
* - Keep Microsoft's conditional comments.
* - Output is optimized for later HTTP compression.
*
* Notes:
* - Source code must be parse error free before processing.
* - In order to maximise later HTTP compression (deflate, gzip),
* new variables names are choosen by considering closures,
* variables' frequency and characters' frequency.
* - If you use with/eval then be careful.
*
* Bonus:
* - Replaces false/true by !1/!0
* - Replaces new Array/Object by []/{}
* - Merges consecutive "var" declarations with commas
* - Merges consecutive concatened strings
* - Fix a bug in Safari's parser (http://forums.asp.net/thread/1585609.aspx)
* - Can replace optional semi-colons by line feeds,
* thus facilitating output debugging.
* - Keep important comments marked with /*!...
* - Treats three semi-colons ;;; like single-line comments
* (http://dean.edwards.name/packer/2/usage/#triple-semi-colon).
* - Fix special catch scope across browsers
* - Work around buggy-handling of named function expressions in IE<=8
*
* TODO?
* - foo['bar'] => foo.bar
* - {'foo':'bar'} => {foo:'bar'}
* - Dead code removal (never used function)
* - Munge primitives: var WINDOW=window, etc.
*/
class JSqueeze
{
const
SPECIAL_VAR_RX = '(\$+[a-zA-Z_]|_[a-zA-Z0-9$])[a-zA-Z0-9_$]*';
public
$charFreq;
protected
$strings,
$closures,
$str0,
$str1,
$argFreq,
$specialVarRx,
$keepImportantComments,
$varRx = '(?:[a-zA-Z_$])[a-zA-Z0-9_$]*',
$reserved = array(
'abstract','as','boolean','break','byte','case','catch','char','class',
'const','continue','debugger','default','delete','do','double','else',
'enum','export','extends','false','final','finally','float','for',
'function','goto','if','implements','import','in','instanceof','int',
'long','native','new','null','package','private','protected','public',
'return','short','static','super','switch','synchronized','this',
'throw','throws','transient','true','try','typeof','var','void',
'while','with','yield','let','interface',
);
function __construct()
{
$this->reserved = array_flip($this->reserved);
$this->charFreq = array_fill(0, 256, 0);
}
/**
* Squeezes a JavaScript source code.
*
* Set $singleLine to false if you want optional
* semi-colons to be replaced by line feeds.
*
* Set $keepImportantComments to false if you want /*! comments to be removed.
*
* $specialVarRx defines the regular expression of special variables names
* for global vars, methods, properties and in string substitution.
* Set it to false if you don't want any.
*
* If the analysed javascript source contains a single line comment like
* this one, then the directive will overwrite $specialVarRx:
*
* // jsqueeze.specialVarRx = your_special_var_regexp_here
*
* Only the first directive is parsed, others are ignored. It is not possible
* to redefine $specialVarRx in the middle of the javascript source.
*
* Example:
* $parser = new JSqueeze;
* $squeezed_js = $parser->squeeze($fat_js);
*/
function squeeze($code, $singleLine = true, $keepImportantComments = true, $specialVarRx = self::SPECIAL_VAR_RX)
{
$code = trim($code);
if ('' === $code) return '';
$this->argFreq = array(-1 => 0);
$this->specialVarRx = $specialVarRx;
$this->keepImportantComments = !!$keepImportantComments;
if (preg_match("#//[ \t]*jsqueeze\.specialVarRx[ \t]*=[ \t]*([\"']?)(.*)\1#i", $code, $key))
{
if (!$key[1])
{
$key[2] = trim($key[2]);
$key[1] = strtolower($key[2]);
$key[1] = $key[1] && $key[1] != 'false' && $key[1] != 'none' && $key[1] != 'off';
}
$this->specialVarRx = $key[1] ? $key[2] : false;
}
// Remove capturing parentheses
$this->specialVarRx && $this->specialVarRx = preg_replace('/(?<!\\\\)((?:\\\\\\\\)*)\((?!\?)/', '(?:', $this->specialVarRx);
false !== strpos($code, "\r" ) && $code = strtr(str_replace("\r\n", "\n", $code), "\r", "\n");
false !== strpos($code, "\xC2\x85" ) && $code = str_replace("\xC2\x85" , "\n", $code); // Next Line
false !== strpos($code, "\xE2\x80\xA8") && $code = str_replace("\xE2\x80\xA8", "\n", $code); // Line Separator
false !== strpos($code, "\xE2\x80\xA9") && $code = str_replace("\xE2\x80\xA9", "\n", $code); // Paragraph Separator
list($code, $this->strings ) = $this->extractStrings( $code);
list($code, $this->closures) = $this->extractClosures($code);
$key = "//''\"\"#0'"; // This crap has a wonderful property: it can not happend in any valid javascript, even in strings
$this->closures[$key] =& $code;
$tree = array($key => array('parent' => false));
$this->makeVars($code, $tree[$key], $key);
$this->renameVars($tree[$key], true);
$code = substr($tree[$key]['code'], 1);
$code = preg_replace("'\breturn !'", 'return!', $code);
$code = preg_replace("'\}(?=(else|while)[^\$.a-zA-Z0-9_])'", "}\r", $code);
$code = str_replace(array_keys($this->strings), array_values($this->strings), $code);
if ($singleLine) $code = strtr($code, "\n", ';');
else $code = str_replace("\n", ";\n", $code);
false !== strpos($code, "\r") && $code = strtr(trim($code), "\r", "\n");
// Cleanup memory
$this->charFreq = array_fill(0, 256, 0);
$this->strings = $this->closures = $this->argFreq = array();
$this->str0 = $this->str1 = '';
return $code;
}
protected function extractStrings($f)
{
if ($cc_on = false !== strpos($f, '@cc_on'))
{
// Protect conditional comments from being removed
$f = str_replace('#', '##', $f);
$f = str_replace('/*@', '1#@', $f);
$f = preg_replace("'//@([^\n]+)'", '2#@$1@#3', $f);
$f = str_replace('@*/', '@#1', $f);
}
$len = strlen($f);
$code = str_repeat(' ', $len);
$j = 0;
$strings = array();
$K = 0;
$instr = false;
$q = array(
"'", '"',
"'" => 0,
'"' => 0,
);
// Extract strings, removes comments
for ($i = 0; $i < $len; ++$i)
{
if ($instr)
{
if ('//' == $instr)
{
if ("\n" == $f[$i])
{
$f[$i--] = ' ';
$instr = false;
}
}
else if ($f[$i] == $instr || ('/' == $f[$i] && "/'" == $instr))
{
if ('!' == $instr) ;
else if ('*' == $instr)
{
if ('/' == $f[$i+1])
{
++$i;
$instr = false;
}
}
else
{
if ("/'" == $instr)
{
while (false !== strpos('gmi', $f[$i+1])) $s[] = $f[$i++];
$s[] = $f[$i];
}
$instr = false;
}
}
else if ('*' == $instr) ;
else if ('!' == $instr)
{
if ('*' == $f[$i] && '/' == $f[$i+1])
{
$s[] = "*/\r";
++$i;
$instr = false;
}
else if ("\n" == $f[$i]) $s[] = "\r";
else $s[] = $f[$i];
}
else if ('\\' == $f[$i])
{
++$i;
if ("\n" != $f[$i])
{
isset($q[$f[$i]]) && ++$q[$f[$i]];
$s[] = '\\' . $f[$i];
}
}
else if ("'" == $f[$i] || '"' == $f[$i])
{
++$q[$f[$i]];
$s[] = '\\' . $f[$i];
}
else $s[] = $f[$i];
}
else switch ($f[$i])
{
case ';':
// Remove triple semi-colon
if ($i>0 && ';' == $f[$i-1] && $i+1 < $len && ';' == $f[$i+1]) $f[$i] = $f[$i+1] = '/';
else
{
$code[++$j] = ';';
break;
}
case '/':
if ('*' == $f[$i+1])
{
++$i;
$instr = '*';
if ($this->keepImportantComments && '!' == $f[$i+1])
{
++$i;
// no break here
}
else break;
}
else if ('/' == $f[$i+1])
{
++$i;
$instr = '//';
break;
}
else
{
$a = $j && ' ' == $code[$j] ? $code[$j-1] : $code[$j];
if (false !== strpos('-!%&;<=>~:^+|,(*?[{ ', $a)
|| (false !== strpos('oenfd', $a)
&& preg_match(
"'(?<![\$.a-zA-Z0-9_])(do|else|return|typeof|yield) ?$'",
substr($code, $j-7, 8)
)))
{
$key = "//''\"\"" . $K++ . $instr = "/'";
$a = $j;
$code .= $key;
while (isset($key[++$j-$a-1])) $code[$j] = $key[$j-$a-1]; --$j;
isset($s) && ($s = implode('', $s)) && $cc_on && $this->restoreCc($s);
$strings[$key] = array('/');
$s =& $strings[$key];
}
else $code[++$j] = '/';
break;
}
case "'":
case '"':
$instr = $f[$i];
$key = "//''\"\"" . $K++ . ('!' == $instr ? '!' : "'");
$a = $j;
$code .= $key;
while (isset($key[++$j-$a-1])) $code[$j] = $key[$j-$a-1]; --$j;
isset($s) && ($s = implode('', $s)) && $cc_on && $this->restoreCc($s);
$strings[$key] = array();
$s =& $strings[$key];
'!' == $instr && $s[] = "\r/*!";
break;
case "\n":
if ($j > 5)
{
' ' == $code[$j] && --$j;
$code[++$j] =
false !== strpos('kend', $code[$j-1])
&& preg_match(
"'(?<![\$.a-zA-Z0-9_])(break|continue|return|yield) ?$'",
substr($code, $j-8, 9)
)
? ';' : ' ';
break;
}
case "\t": $f[$i] = ' ';
case ' ':
if (!$j || ' ' == $code[$j]) break;
default:
$code[++$j] = $f[$i];
}
}
isset($s) && ($s = implode('', $s)) && $cc_on && $this->restoreCc($s);
unset($s);
$code = substr($code, 0, $j+1);
$cc_on && $this->restoreCc($code, false);
// Protect wanted spaces and remove unwanted ones
$code = str_replace('- -', "-\x7F-", $code);
$code = str_replace('+ +', "+\x7F+", $code);
$code = preg_replace("'(\d)\s+\.\s*([a-zA-Z\$_[(])'", "$1\x7F.$2", $code);
$code = preg_replace("# ([-!%&;<=>~:.^+|,()*?[\]{}/']+)#", '$1', $code);
$code = preg_replace( "#([-!%&;<=>~:.^+|,()*?[\]{}/]+) #", '$1', $code);
// Replace new Array/Object by []/{}
false !== strpos($code, 'new Array' ) && $code = preg_replace( "'new Array(?:\(\)|([;\])},:]))'", '[]$1', $code);
false !== strpos($code, 'new Object') && $code = preg_replace("'new Object(?:\(\)|([;\])},:]))'", '{}$1', $code);
// Add missing semi-colons after curly braces
// This adds more semi-colons than strictly needed,
// but it seems that later gzipping is favorable to the repetition of "};"
$code = preg_replace("'\}(?![:,;.()\[\]}\|&]|(else|catch|finally|while)[^\$.a-zA-Z0-9_])'", '};', $code);
// Tag possible empty instruction for easy detection
$code = preg_replace("'(?<![\$.a-zA-Z0-9_])if\('" , '1#(', $code);
$code = preg_replace("'(?<![\$.a-zA-Z0-9_])for\('" , '2#(', $code);
$code = preg_replace("'(?<![\$.a-zA-Z0-9_])while\('", '3#(', $code);
$forPool = array();
$instrPool = array();
$s = 0;
$f = array();
$j = -1;
// Remove as much semi-colon as possible
$len = strlen($code);
for ($i = 0; $i < $len; ++$i)
{
switch ($code[$i])
{
case '(':
if ($j>=0 && "\n" == $f[$j]) $f[$j] = ';';
++$s;
if ($i && '#' == $code[$i-1])
{
$instrPool[$s - 1] = 1;
if ('2' == $code[$i-2]) $forPool[$s] = 1;
}
$f[++$j] = '(';
break;
case ']':
case ')':
if ($i+1 < $len && !isset($forPool[$s]) && !isset($instrPool[$s-1]) && preg_match("'[a-zA-Z0-9_\$]'", $code[$i+1]))
{
$f[$j] .= $code[$i];
$f[++$j] = "\n";
}
else $f[++$j] = $code[$i];
if (')' == $code[$i])
{
unset($forPool[$s]);
--$s;
}
continue 2;
case '}':
if ("\n" == $f[$j]) $f[$j] = '}';
else $f[++$j] = '}';
break;
case ';':
if (isset($forPool[$s]) || isset($instrPool[$s])) $f[++$j] = ';';
else if ($j>=0 && "\n" != $f[$j] && ';' != $f[$j]) $f[++$j] = "\n";
break;
case '#':
switch ($f[$j])
{
case '1': $f[$j] = 'if'; break 2;
case '2': $f[$j] = 'for'; break 2;
case '3': $f[$j] = 'while'; break 2;
}
case '[';
if ($j>=0 && "\n" == $f[$j]) $f[$j] = ';';
default: $f[++$j] = $code[$i];
}
unset($instrPool[$s]);
}
$f = implode('', $f);
$cc_on && $f = str_replace('@#3', "\n", $f);
// Fix "else ;" empty instructions
$f = preg_replace("'(?<![\$.a-zA-Z0-9_])else\n'", "\n", $f);
$r1 = array( // keywords with a direct object
'case','delete','do','else','function','in','instanceof','break',
'new','return','throw','typeof','var','void','yield','let','if',
);
$r2 = array( // keywords with a subject
'in','instanceof',
);
// Fix missing semi-colons
$f = preg_replace("'(?<!(?<![a-zA-Z0-9_\$])" . implode(')(?<!(?<![a-zA-Z0-9_\$])', $r1) . ") (?!(" . implode('|', $r2) . ")(?![a-zA-Z0-9_\$]))'", "\n", $f);
$f = preg_replace("'(?<!(?<![a-zA-Z0-9_\$])do)(?<!(?<![a-zA-Z0-9_\$])else) if\('", "\nif(", $f);
$f = preg_replace("'(?<=--|\+\+)(?<![a-zA-Z0-9_\$])(" . implode('|', $r1) . ")(?![a-zA-Z0-9_\$])'", "\n$1", $f);
$f = preg_replace("'(?<![a-zA-Z0-9_\$])for\neach\('", 'for each(', $f);
$f = preg_replace("'(?<![a-zA-Z0-9_\$])\n(" . implode('|', $r2) . ")(?![a-zA-Z0-9_\$])'", '$1', $f);
// Merge strings
if ($q["'"] > $q['"']) $q = array($q[1], $q[0]);
$f = preg_replace("#//''\"\"[0-9]+'#", $q[0] . '$0' . $q[0], $f);
strpos($f, $q[0] . '+' . $q[0]) && $f = str_replace($q[0] . '+' . $q[0], '', $f);
$len = count($strings);
foreach ($strings as $r1 => &$r2)
{
$r2 = "/'" == substr($r1, -2)
? str_replace(array("\\'", '\\"'), array("'", '"'), $r2)
: str_replace('\\' . $q[1], $q[1], $r2);
}
// Restore wanted spaces
$f = strtr($f, "\x7F", ' ');
return array($f, $strings);
}
protected function extractClosures($code)
{
$code = ';' . $code;
$this->argFreq[-1] += substr_count($code, '}catch(');
if ($this->argFreq[-1])
{
// Special catch scope handling
// FIXME: this implementation doesn't work with nested catch scopes who need
// access to their parent's caught variable (but who needs that?).
$f = preg_split("@}catch\(({$this->varRx})@", $code, -1, PREG_SPLIT_DELIM_CAPTURE);
$code = 'catch$scope$var' . mt_rand();
$this->specialVarRx = $this->specialVarRx ? '(?:' . $this->specialVarRx . '|' . preg_quote($code) . ')' : preg_quote($code);
$i = count($f) - 1;
while ($i)
{
$c = 1;
$j = 0;
$l = strlen($f[$i]);
while ($c && $j < $l)
{
$s = $f[$i][$j++];
$c += '(' == $s ? 1 : (')' == $s ? -1 : 0);
}
if (!$c) do
{
$s = $f[$i][$j++];
$c += '{' == $s ? 1 : ('}' == $s ? -1 : 0);
}
while ($c && $j < $l);
$c = preg_quote($f[$i-1], '#');
$f[$i-2] .= '}catch(' . preg_replace("#([.,{]?)(?<![a-zA-Z0-9_\$@]){$c}\\b#", '$1' . $code, $f[$i-1] . substr($f[$i], 0, $j)) . substr($f[$i], $j);
unset($f[$i--], $f[$i--]);
}
$code = $f[0];
}
$f = preg_split("'(?<![a-zA-Z0-9_\$])(function[ (].*?\{)'", $code, -1, PREG_SPLIT_DELIM_CAPTURE);
$i = count($f) - 1;
$closures = array();
while ($i)
{
$c = 1;
$j = 0;
$l = strlen($f[$i]);
while ($c && $j < $l)
{
$s = $f[$i][$j++];
$c += '{' == $s ? 1 : ('}' == $s ? -1 : 0);
}
switch (substr($f[$i-2], -1))
{
default: if (false !== $c = strpos($f[$i-1], ' ', 8)) break;
case false: case "\n": case ';': case '{': case '}': case ')': case ']':
$c = strpos($f[$i-1], '(', 8);
}
$l = "//''\"\"#$i'";
$code = substr($f[$i-1], $c);
$closures[$l] = $code . substr($f[$i], 0, $j);
$f[$i-2] .= substr($f[$i-1], 0, $c) . $l . substr($f[$i], $j);
if ('(){' !== $code)
{
$j = substr_count($code, ',');
do isset($this->argFreq[$j]) ? ++$this->argFreq[$j] : $this->argFreq[$j] = 1;
while ($j--);
}
$i -= 2;
}
return array($f[0], $closures);
}
protected function makeVars($closure, &$tree, $key)
{
$tree['code'] =& $closure;
$tree['nfe'] = false;
$tree['used'] = array();
$tree['local'] = array();
// Replace multiple "var" declarations by a single one
$closure = preg_replace_callback("'(?<=[\n\{\}])var [^\n\{\}]+(?:\nvar [^\n\{\}]+)+'", array(&$this, 'mergeVarDeclarations'), $closure);
// Get all local vars (functions, arguments and "var" prefixed)
$vars =& $tree['local'];
if (preg_match("'^( [^(]*)?\((.*?)\)\{'", $closure, $v))
{
if ($v[1])
{
$vars[$tree['nfe'] = substr($v[1], 1)] = -1;
$tree['parent']['local'][';' . $key] =& $vars[$tree['nfe']];
}
if ($v[2])
{
$i = 0;
$v = explode(',', $v[2]);
foreach ($v as $w) $vars[$w] = $this->argFreq[$i++] - 1; // Give a bonus to argument variables
}
}
$v = preg_split("'(?<![\$.a-zA-Z0-9_])var '", $closure);
if ($i = count($v) - 1)
{
$w = array();
while ($i)
{
$j = $c = 0;
$l = strlen($v[$i]);
while ($j < $l)
{
switch ($v[$i][$j])
{
case '(': case '[': case '{':
++$c;
break;
case ')': case ']': case '}':
if ($c-- <= 0) break 2;
break;
case ';': case "\n":
if (!$c) break 2;
default:
$c || $w[] = $v[$i][$j];
}
++$j;
}
$w[] = ',';
--$i;
}
$v = explode(',', implode('', $w));
foreach ($v as $w) if (preg_match("'^{$this->varRx}'", $w, $v)) isset($vars[$v[0]]) || $vars[$v[0]] = 0;
}
if (preg_match_all("@function ({$this->varRx})//''\"\"#@", $closure, $v))
{
foreach ($v[1] as $w) isset($vars[$w]) || $vars[$w] = 0;
}
if ($this->argFreq[-1] && preg_match_all("@}catch\(({$this->varRx})@", $closure, $v))
{
$v[0] = array();
foreach ($v[1] as $w) isset($v[0][$w]) ? ++$v[0][$w] : $v[0][$w] = 1;
foreach ($v[0] as $w => $v) $vars[$w] = $this->argFreq[-1] - $v;
}
// Get all used vars, local and non-local
$vars =& $tree['used'];
if (preg_match_all("#([.,{]?)(?<![a-zA-Z0-9_\$])({$this->varRx})(:?)#", $closure, $w, PREG_SET_ORDER))
{
foreach ($w as $k)
{
if (',' === $k[1] || '{' === $k[1])
{
if (':' === substr($k[3], -1)) $k = '.' . $k[2];
else $k = $k[2];
}
else $k = $k[1] . $k[2];
isset($vars[$k]) ? ++$vars[$k] : $vars[$k] = 1;
}
}
if (preg_match_all("#//''\"\"[0-9]+(?:['!]|/')#", $closure, $w)) foreach ($w[0] as $a)
{
$v = "'" === substr($a, -1) && "/'" !== substr($a, -2) && $this->specialVarRx
? preg_split("#([.,{]?(?<![a-zA-Z0-9_\$@]){$this->specialVarRx}:?)#", $this->strings[$a], -1, PREG_SPLIT_DELIM_CAPTURE)
: array($this->strings[$a]);
$a = count($v);
for ($i = 0; $i < $a; ++$i)
{
$k = $v[$i];
if (1 === $i%2)
{
if (',' === $k[0] || '{' === $k[0])
{
if (':' === substr($k, -1)) $k = '.' . substr($k, 1, -1);
else $k = substr($k, 1);
}
else if (':' === substr($k, -1)) $k = substr($k, 0, -1);
$w =& $tree;
while (isset($w['parent']) && !(isset($w['used'][$k]) || isset($w['local'][$k]))) $w =& $w['parent'];
(isset($w['used'][$k]) || isset($w['local'][$k])) && (isset($vars[$k]) ? ++$vars[$k] : $vars[$k] = 1);
unset($w);
}
if (0 === $i%2 || !isset($vars[$k])) foreach (count_chars($v[$i], 1) as $k => $w) $this->charFreq[$k] += $w;
}
}
// Propagate the usage number to parents
foreach ($vars as $w => $a)
{
$k =& $tree;
$chain = array();
do
{
$vars =& $k['local'];
$chain[] =& $k;
if (isset($vars[$w]))
{
unset($k['used'][$w]);
if (isset($vars[$w])) $vars[$w] += $a;
else $vars[$w] = $a;
$a = false;
break;
}
}
while ($k['parent'] && $k =& $k['parent']);
if ($a && !$k['parent'])
{
if (isset($vars[$w])) $vars[$w] += $a;
else $vars[$w] = $a;
}
if (isset($tree['used'][$w]) && isset($vars[$w])) foreach ($chain as &$b)
{
isset($b['local'][$w]) || $b['used'][$w] =& $vars[$w];
}
}
// Analyse childs
$tree['childs'] = array();
$vars =& $tree['childs'];
if (preg_match_all("@//''\"\"#[0-9]+'@", $closure, $w))
{
foreach ($w[0] as $a)
{
$vars[$a] = array('parent' => &$tree);
$this->makeVars($this->closures[$a], $vars[$a], $a);
}
}
}
protected function mergeVarDeclarations($m)
{
return str_replace("\nvar ", ',', $m[0]);
}
protected function renameVars(&$tree, $root)
{
if ($root)
{
$tree['local'] += $tree['used'];
$tree['used'] = array();
foreach ($tree['local'] as $k => $v)
{
if ('.' == $k[0]) $k = substr($k, 1);
if ('true' === $k) $this->charFreq[48] += $v;
else if ('false' === $k) $this->charFreq[49] += $v;
else if (!$this->specialVarRx || !preg_match("#^{$this->specialVarRx}$#", $k))
{
foreach (count_chars($k, 1) as $k => $w) $this->charFreq[$k] += $w * $v;
}
else if (2 == strlen($k)) $tree['used'][] = $k[1];
}
arsort($this->charFreq);
$this->str0 = '';
$this->str1 = '';
foreach ($this->charFreq as $k => $v)
{
if (!$v) break;
$v = chr($k);
if ((64 < $k && $k < 91) || (96 < $k && $k < 123)) // A-Z a-z
{
$this->str0 .= $v;
$this->str1 .= $v;
}
else if (47 < $k && $k < 58) // 0-9
{
$this->str1 .= $v;
}
}
if ('' === $this->str0)
{
$this->str0 = 'claspemitdbfrugnjvhowkxqyzCLASPEMITDBFRUGNJVHOWKXQYZ';
$this->str1 = $this->str0 . '0123456789';
}
foreach ($tree['local'] as $var => $root)
{
if ('.' != substr($var, 0, 1) && isset($tree['local'][".{$var}"])) $tree['local'][$var] += $tree['local'][".{$var}"];
}
foreach ($tree['local'] as $var => $root)
{
if ('.' == substr($var, 0, 1) && isset($tree['local'][substr($var, 1)])) $tree['local'][$var] = $tree['local'][substr($var, 1)];
}
arsort($tree['local']);
foreach ($tree['local'] as $var => $root) switch (substr($var, 0, 1))
{
case '.':
if (!isset($tree['local'][substr($var, 1)]))
{
$tree['local'][$var] = '#' . ($this->specialVarRx && 3 < strlen($var) && preg_match("'^\.{$this->specialVarRx}$'", $var) ? $this->getNextName($tree) . '$' : substr($var, 1));
}
break;
case ';': $tree['local'][$var] = 0 === $root ? '' : $this->getNextName($tree);
case '#': break;
default:
$root = $this->specialVarRx && 2 < strlen($var) && preg_match("'^{$this->specialVarRx}$'", $var) ? $this->getNextName($tree) . '$' : $var;
$tree['local'][$var] = $root;
if (isset($tree['local'][".{$var}"])) $tree['local'][".{$var}"] = '#' . $root;
}
foreach ($tree['local'] as $var => $root) $tree['local'][$var] = preg_replace("'^#'", '.', $tree['local'][$var]);
}
else
{
arsort($tree['local']);
if (false !== $tree['nfe']) $tree['used'][] = $tree['local'][$tree['nfe']];
foreach ($tree['local'] as $var => $root)
if ($tree['nfe'] !== $var)
$tree['local'][$var] = 0 === $root ? '' : $this->getNextName($tree);
}
$this->local_tree =& $tree['local'];
$this->used_tree =& $tree['used'];
$tree['code'] = preg_replace_callback("#[.,{ ]?(?<![a-zA-Z0-9_\$@]){$this->varRx}:?#", array(&$this, 'getNewName'), $tree['code']);
$this->specialVarRx && $tree['code'] = preg_replace_callback("#//''\"\"[0-9]+'#", array(&$this, 'renameInString'), $tree['code']);
foreach ($tree['childs'] as $a => &$b)
{
$this->renameVars($b, false);
$tree['code'] = str_replace($a, $b['code'], $tree['code']);
unset($tree['childs'][$a]);
}
}
protected function renameInString($a)
{
$b =& $this->strings[$a[0]];
unset($this->strings[$a[0]]);
return preg_replace_callback(
"#[.,{]?(?<![a-zA-Z0-9_\$@]){$this->specialVarRx}:?#",
array(&$this, 'getNewName'),
$b
);
}
protected function getNewName($m)
{
$m = $m[0];
$pre = '.' === $m[0] ? '.' : '';
$post = '';
if (',' === $m[0] || '{' === $m[0] || ' ' === $m[0])
{
$pre = $m[0];
if (':' === substr($m, -1))
{
$post = ':';
$m = (' ' !== $m[0] ? '.' : '') . substr($m, 1, -1);
}
else $m = substr($m, 1);
}
else if (':' === substr($m, -1))
{
$post = ':';
$m = substr($m, 0, -1);
}
$post = (isset($this->reserved[$m])
? ('true' === $m ? '!0' : ('false' === $m ? '!1': $m))
: (
isset($this->local_tree[$m])
? $this->local_tree[$m]
: (
isset($this->used_tree[$m])
? $this->used_tree[$m]
: $m
)
)
) . $post;
return '' === $post ? '' : ($pre . ('.' === $post[0] ? substr($post, 1) : $post));
}
protected function getNextName(&$tree = array(), &$counter = false)
{
if (false === $counter)
{
$counter =& $tree['counter'];
isset($counter) || $counter = -1;
$exclude = array_flip($tree['used']);
}
else $exclude = $tree;
++$counter;
$len0 = strlen($this->str0);
$len1 = strlen($this->str0);
$name = $this->str0[$counter % $len0];
$i = intval($counter / $len0) - 1;
while ($i>=0)
{
$name .= $this->str1[ $i % $len1 ];
$i = intval($i / $len1) - 1;
}
return !(isset($this->reserved[$name]) || isset($exclude[$name])) ? $name : $this->getNextName($exclude, $counter);
}
protected function restoreCc(&$s, $lf = true)
{
$lf && $s = str_replace('@#3', '', $s);
$s = str_replace('@#1', '@*/', $s);
$s = str_replace('2#@', '//@', $s);
$s = str_replace('1#@', '/*@', $s);
$s = str_replace('##', '#', $s);
}
}