diff options
Diffstat (limited to 'javascript/jsPacker/Pack.pm')
| -rw-r--r-- | javascript/jsPacker/Pack.pm | 467 |
1 files changed, 0 insertions, 467 deletions
diff --git a/javascript/jsPacker/Pack.pm b/javascript/jsPacker/Pack.pm deleted file mode 100644 index fbd2292..0000000 --- a/javascript/jsPacker/Pack.pm +++ /dev/null @@ -1,467 +0,0 @@ -#Pack (July 2005)
-# Based on "Pack.js" by Dean Edwards <http://dean.edwards.name/>
-# Ported to Perl by Rob Seiler, ELR Software Pty Ltd <http://www.elr.com.au>
-# Copyright 2005. License <http://creativecommons.org/licenses/LGPL/2.1/>
-
-package Pack;
-use strict;
-use Data::Dumper;
-
-use ParseMaster;
-
-# Package wide variable declarations
-use vars qw/$VERSION $PM_VERSION
- $_X_encodePrivate $_JSunpack $_JSdecode %baseLookup
- $_X_encode10 $_X_encode36 $_X_encode62 $_X_encode95
- $_JSencode10 $_JSencode36 $_JSencode62 $_JSencode95
- @_X_parsers
- $_X_script $_X_encoding $_X_fastDecode $_X_specialChars
- /;
-$VERSION = '024';
-$PM_VERSION = $ParseMaster::VERSION;
-
-# Package wide constants
-my $X_IGNORE = q{$1};
-my $X_ENCODE = q/\x24encode\(\x24count\)/; # NB: requires g modifier
-my $PERL = 'perl'; # Flag to indicate whether we need to use one of our "internal" Perl encoding functions
-my $JSCRIPT = 'jscript'; # or embed a pre-build JScript encoding function
-########################################
-
-##################
-sub pack($$$$) { # require 4 arguments
-##################
-#print Dumper(@_);
- ($_X_script, $_X_encoding, $_X_fastDecode, $_X_specialChars) = @_;
- # validate parameters (sort of!)
- $_X_script .= "\n";
- $_X_encoding = ($_X_encoding > 95) ? 95 : $_X_encoding;
-
- @_X_parsers = (); # Reset parsers
-
-####################
- sub _X_pack($) { # require 1 argument
-####################
- # apply all parsing routines
- my $X_script = shift;
- for (my $i = 0; $i<scalar(@_X_parsers); $i++) {
- my $X_parse = $_X_parsers[$i];
- $X_script = &$X_parse($X_script);
- }
- return $X_script;
- };
-
-######################
- sub _X_addParser { #
-######################
- # keep a list of parsing functions, they'll be executed all at once
- my $X_parser = shift;
- push (@_X_parsers,$X_parser);
- }
-
-#############################
- sub _X_basicCompression { #
-#############################
- # zero encoding - just removal of white space and comments
- my $X_script = shift;
- my $parser = ParseMaster->new();
- # make safe
- $parser->escapeChar("\\");
- # protect strings
- $parser->add(q/'[^'\n\r]*'/, $X_IGNORE);
- $parser->add(q/"[^"\n\r]*"/, $X_IGNORE);
- # remove comments
- $parser->add(q/\/\/[^\n\r]*[\n\r]/);
- $parser->add(q/\/\*[^*]*\*+([^\/][^*]*\*+)*\//);
- # protect regular expressions
- $parser->add(q/\s+(\/[^\/\n\r\*][^\/\n\r]*\/g?i?)/, q{$2}); # IGNORE
- $parser->add(q/[^\w\x24\/'"*)\?:]\/[^\/\n\r\*][^\/\n\r]*\/g?i?/, $X_IGNORE);
- # remove: ;;; doSomething();
- $parser->add(q/;;[^\n\r]+[\n\r]/) if ($_X_specialChars);
- # remove redundant semi-colons
- $parser->add(q/;+\s*([};])/, q{$2});
- # remove white-space
- $parser->add(q/(\b|\x24)\s+(\b|\x24)/, q{$2 $3});
- $parser->add(q/([+\-])\s+([+\-])/, q{$2 $3});
- $parser->add(q/\s+/, '');
- # done
- return $parser->exec($X_script);
- }
-
-###############################
- sub _X_encodeSpecialChars { #
-###############################
- my $X_script = shift;
- my $parser = ParseMaster->new();
- # replace: $name -> n, $$name -> $$na
- $parser->add(q/((\x24+)([a-zA-Z\x24_]+))(\d*)/,
- sub {
- my $X_offset = pop;
- my @X_match = @_;
- my $X_length = length($X_match[$X_offset+2]);
- my $lengthnext = length($X_match[$X_offset+3]);
- my $X_start = $X_length - ((($X_length - $lengthnext) > 0) ? ($X_length - $lengthnext) : 0);
- my $str = $X_match[$X_offset+1];
- $str = substr($str,$X_start,$X_length) . $X_match[$X_offset+4];
- return "$str";
- });
- # replace: _name -> _0, double-underscore (__name) is ignored
- my $X_regexp = q/\b_[A-Za-z\d]\w*/;
- # build the word list
- my %X_keywords = &_X_analyze($X_script, $X_regexp, $_X_encodePrivate);
-#print Dumper(%X_keywords);
- # quick ref
- my $X_encoded = \$X_keywords{X_encoded}; # eg _private1 => '_0',_private2 => '_1';
-#print Dumper($X_encoded);
- $parser->add($X_regexp, sub {my $X_offset = pop; my @X_match = @_; return ${$X_encoded}->{$X_match[$X_offset]};});
-
- return $parser->exec($X_script);
- };
-
-###########################
- sub _X_encodeKeywords { #
-###########################
- my $X_script = shift;
- # escape high-ascii values already in the script (i.e. in strings)
- if ($_X_encoding > 62) {$X_script = &_X_escape95($X_script)};
- # create the parser
- my $parser = ParseMaster->new();
- my $X_encode = &_X_getEncoder($_X_encoding,$PERL);
- # for high-ascii, don't encode single character low-ascii
- my $X_regexp = ($_X_encoding > 62) ? q/\w\w+/ : q/\w+/;
- # build the word list
- my %X_keywords = &_X_analyze($X_script, $X_regexp, $X_encode);
-#print Dumper(%X_keywords);
- my $X_encoded = \$X_keywords{X_encoded}; # eg alert => 2, function => 10 etc
- # encode
- $parser->add($X_regexp, sub {my $X_offset = pop; my @X_match = @_; return ${$X_encoded}->{$X_match[$X_offset]};});
- # if encoded, wrap the script in a decoding function
-
- return $X_script && _X_bootStrap(\$parser->exec($X_script), \%X_keywords);
- }
-
-####################
- sub _X_analyze { #
-####################
-#print Dumper(@_);
- my ($X_script, $X_regexp, $X_encode) = @_;
- # analyse
- # retreive all words in the script
- my @X_all = $X_script =~ m/$X_regexp/g; # Save all captures in a list context
- my %XX_sorted = (); # list of words sorted by frequency
- my %XX_encoded = (); # dictionary of word->encoding
- my %XX_protected = (); # instances of "protected" words
- if (@X_all) {
- my @X_unsorted = (); # same list, not sorted
- my %X_protected = (); # "protected" words (dictionary of word->"word")
- my %X_values = (); # dictionary of charCode->encoding (eg. 256->ff)
- my %X_count = (); # word->count
- my $i = scalar(@X_all); my $j = 0; my $X_word = '';
- # count the occurrences - used for sorting later
- do {
- $X_word = '$' . $X_all[--$i];
- if (!exists($X_count{$X_word})) {
- $X_count{$X_word} = [0,$i]; # Store both the usage count and original array position (ie a secondary sort key)
- $X_unsorted[$j] = $X_word;
- # make a dictionary of all of the protected words in this script
- # these are words that might be mistaken for encoding
- $X_values{$j} = &$X_encode($j);
- my $v = '$'.$X_values{$j};
- $X_protected{$v} = $j++;
- }
- # increment the word counter
- $X_count{$X_word}[0]++;
- } while ($i);
-#print Dumper (%X_values);
-#print Dumper (@X_unsorted);
-#print Dumper (%X_protected);
- # prepare to sort the word list, first we must protect
- # words that are also used as codes. we assign them a code
- # equivalent to the word itself.
- # e.g. if "do" falls within our encoding range
- # then we store keywords["do"] = "do";
- # this avoids problems when decoding
- $i = scalar(@X_unsorted);
- do {
- $X_word = $X_unsorted[--$i];
- if (exists($X_protected{$X_word})) {
- $XX_sorted{$X_protected{$X_word}} = substr($X_word,1);
- $XX_protected{$X_protected{$X_word}} = 1; # true
- $X_count{$X_word}[0] = 0;
- }
- } while ($i);
-#print Dumper (%XX_protected);
-#print Dumper (%XX_sorted);
-#print Dumper (%X_count);
- # sort the words by frequency
- # Sort with count a primary key and original array order as secondary key - which is apparently the default in javascript!
- @X_unsorted = sort ({($X_count{$b}[0] - $X_count{$a}[0]) or ($X_count{$b}[1] <=> $X_count{$a}[1])} @X_unsorted);
-#print Dumper (@X_unsorted) . "\n";
-
- $j = 0;
- # because there are "protected" words in the list
- # we must add the sorted words around them
- do {
- if (!exists($XX_sorted{$i})) {$XX_sorted{$i} = substr($X_unsorted[$j++],1)}
- $XX_encoded{$XX_sorted{$i}} = $X_values{$i};
- } while (++$i < scalar(@X_unsorted));
- }
-#print Dumper(X_sorted => \%XX_sorted, X_encoded => \%XX_encoded, X_protected => \%XX_protected);
- return (X_sorted => \%XX_sorted, X_encoded => \%XX_encoded, X_protected => \%XX_protected);
- }
-
-######################
- sub _X_bootStrap { #
-######################
- # build the boot function used for loading and decoding
- my ($X_packed, $X_keywords) = @_; # Reference arguments!
-#print Dumper ($X_keywords) . "\n";
-
- # $packed: the packed script - dereference and escape
- $X_packed = "'" . &_X_escape($$X_packed) ."'";
-
- my %sorted = %{$$X_keywords{X_sorted}}; # Dereference to local variables
- my %protected = %{$$X_keywords{X_protected}}; # for simplicity
-
- my @sorted = ();
- foreach my $key (keys %sorted) {$sorted[$key] = $sorted{$key}}; # Convert hash to a standard list
-
- # ascii: base for encoding
- my $X_ascii = ((scalar(@sorted) > $_X_encoding) ? $_X_encoding : scalar(@sorted)) || 1;
-
- # count: number of (unique {RS}) words contained in the script
- my $X_count = scalar(@sorted); # Use $X_count for assigning $X_ascii
-
- # keywords: list of words contained in the script
- foreach my $i (keys %protected) {$sorted[$i] = ''}; # Blank out protected words
-#print Dumper(@sorted) . "\n";
-
- # convert from a string to an array - prepare keywords as a JScript string->array {RS}
- $X_keywords = "'" . join('|',@sorted) . "'.split('|')";
-
- # encode: encoding function (used for decoding the script)
- my $X_encode = $_X_encoding > 62 ? $_JSencode95 : &_X_getEncoder($X_ascii,$JSCRIPT); # This is a JScript function (as a string)
- $X_encode =~ s/_encoding/\x24ascii/g; $X_encode =~ s/arguments\.callee/\x24encode/g;
- my $X_inline = '$count' . ($X_ascii > 10 ? '.toString($ascii)' : '');
-
- # decode: code snippet to speed up decoding
- my $X_decode = '';
- if ($_X_fastDecode) {
- # create the decoder
- $X_decode = &_X_getFunctionBody($_JSdecode); # ie from the Javascript literal function
- if ($_X_encoding > 62) {$X_decode =~ s/\\\\w/[\\xa1-\\xff]/g}
- # perform the encoding inline for lower ascii values
- elsif ($X_ascii < 36) {$X_decode =~ s/$X_ENCODE/$X_inline/g}
- # special case: when $X_count==0 there ar no keywords. i want to keep
- # the basic shape of the unpacking funcion so i'll frig the code...
- if (!$X_count) {$X_decode =~ s/(\x24count)\s*=\s*1/$1=0/}
- }
-
- # boot function
- my $X_unpack = $_JSunpack;
- if ($_X_fastDecode) {
- # insert the decoder
- $X_unpack =~ s/\{/\{$X_decode;/;
- }
- $X_unpack =~ s/"/'/g;
- if ($_X_encoding > 62) { # high-ascii
- # get rid of the word-boundaries for regexp matches
- $X_unpack =~ s/'\\\\b'\s*\+|\+\s*'\\\\b'//g; # Not checked! {RS}
- }
- if ($X_ascii > 36 || $_X_encoding > 62 || $_X_fastDecode) {
- # insert the encode function
- $X_unpack =~ s/\{/\{\$encode=$X_encode;/;
- } else {
- # perform the encoding inline
- $X_unpack =~ s/$X_ENCODE/$X_inline/;
- }
-
- # arguments {RS} Do this before using &pack because &pack changes the pack parameters (eg $fastDecode) in Perl!!
- my $X_params = "$X_packed,$X_ascii,$X_count,$X_keywords"; # Interpolate to comma separated string
- if ($_X_fastDecode) {
- # insert placeholders for the decoder
- $X_params .= ',0,{}';
- }
-
- # pack the boot function too
- $X_unpack = &pack($X_unpack,0,0,1);
-
- # the whole thing
- return "eval(" . $X_unpack . "(" . $X_params . "))\n";
- };
-
-#######################
- sub _X_getEncoder { #
-#######################
- # mmm.. ..which one do i need ?? ({RS} Perl or JScript ??)
- my ($X_ascii,$language) = @_;
- my $perl_encoder = ($X_ascii > 10) ? ($X_ascii > 36) ? ($X_ascii > 62) ? $_X_encode95 : $_X_encode62 : $_X_encode36 : $_X_encode10;
- my $jscript_encoder = ($X_ascii > 10) ? ($X_ascii > 36) ? ($X_ascii > 62) ? $_JSencode95 : $_JSencode62 : $_JSencode36 : $_JSencode10;
- return ($language eq $JSCRIPT) ? $jscript_encoder : $perl_encoder;
- };
-
-#############################
-# Perl versions of encoders #
-#############################
- # base10 zero encoding - characters: 0123456789
- $_X_encode10 = sub {return &_encodeBase(shift,10)};
- # base36 - characters: 0123456789abcdefghijklmnopqrstuvwxyz
- $_X_encode36 = sub {return &_encodeBase(shift,36)};
- # base62 - characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
- $_X_encode62 = sub {return &_encodeBase(shift,62)};
- # high-ascii values - characters: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ
- $_X_encode95 = sub {return &_encodeBase(shift,95)};
- # Lookup character sets for baseN encoding
- $baseLookup{10} = [(0..9)[0..9]]; # base 10
- $baseLookup{36} = [(0..9,'a'..'z')[0..35]]; # base 36
- $baseLookup{62} = [(0..9,'a'..'z','A'..'Z')[0..61]]; # base 62
- $baseLookup{95} = (); for (my $i=0; $i<95; $i++) {$baseLookup{95}[$i] = chr($i+161)}; # base95 (high ascii)
-#print Dumper(%baseLookup);
-#####################
- sub _encodeBase { #
-#####################
- # Generic base conversion function using defined lookup arrays (perl version only)
- my ($X_charCode, $base) = @_;
- my $X_encoded = '';
- # Do we know this encoding?
- if (exists ($baseLookup{$base})) {
- if ($X_charCode == 0) {$X_encoded = $baseLookup{$base}[0]}
- while($X_charCode > 0) {
- $X_encoded = $baseLookup{$base}[$X_charCode % $base] . $X_encoded;
- $X_charCode = int($X_charCode / $base);
- }
- }
- else {$X_encoded = "$X_charCode"} # default is to return unchanged (ie as for base 10) if no baselookup is available
- return $X_encoded;
- };
-
-#############################
- $_X_encodePrivate = sub { #
-#############################
- # special _chars
- my $X_charCode = shift;
- return '_' . $X_charCode;
- };
-
-############################
- sub _X_escape($script) { #
-############################
- # protect characters used by the parser
- my $X_script = shift;
- $X_script =~ s/([\\'])/\\$1/g;
- return $X_script;
- };
-
-#####################
- sub _X_escape95 { #
-#####################
- # protect high-ascii characters already in the script
- my $X_script = shift;
- $X_script =~ s/([\xa1-\xff])/sprintf("\\x%1x",ord($1))/eg;
- return $X_script;
- };
-
-############################
- sub _X_getFunctionBody { #
-############################
- # extract the body of a function (ie between opening/closing {}) - consistent with Dean Edwards approach
- my $X_function = shift;
- $X_function =~ m/^.*\{(.*)\}*$/sg; # Multiline, global (greedy)
- my $start = index($X_function,'{');
- my $end = rindex($X_function,'}');
- $X_function = substr($X_function,($start+1),($end-1-$start));
- return $X_function;
- };
-
-######################
- sub _X_globalize { #
-######################
- # set the global flag on a RegExp (you have to create a new one) !!! Unused in perl version
- # my $X_regexp = shift;
- };
-
- # build the parsing routine
- &_X_addParser(\&_X_basicCompression);
- &_X_addParser(\&_X_encodeSpecialChars) if ($_X_specialChars);
- &_X_addParser(\&_X_encodeKeywords) if ($_X_encoding);
-
- # go!
- return &_X_pack($_X_script);
-}
-
-########################
-# Javascript Literals #
-########################
-
-# JScript function "_unpack" - from DeanEdwards pack.js (NB: No ";" after final "}")
-($_JSunpack) = <<'END_JSCRIPT_UNPACK';
-/* unpacking function - this is the boot strap function */
-/* data extracted from this packing routine is passed to */
-/* this function when decoded in the target */
-function($packed, $ascii, $count, $keywords, $encode, $decode) {
- while ($count--)
- if ($keywords[$count])
- $packed = $packed.replace(new RegExp('\\b' + $encode($count) + '\\b', 'g'), $keywords[$count]);
- /* RS_Debug = $packed; */ /* {RS} !!!!!!!!! */
- return $packed;
-}
-END_JSCRIPT_UNPACK
-
-# JScript function "_decode" - from DeanEdwards pack.js
-($_JSdecode) = <<'END_JSCRIPT_DECODE';
- /* code-snippet inserted into the unpacker to speed up decoding */
- function() {
- /* does the browser support String.replace where the */
- /* replacement value is a function? */
- if (!''.replace(/^/, String)) {
- /* decode all the values we need */
- while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count);
- /* global replacement function */
- $keywords = [function($encoded){return $decode[$encoded]}];
- /* generic match */
- $encode = function(){return'\\w+'};
- /* reset the loop counter - we are now doing a global replace */
- $count = 1;
- }
- };
-END_JSCRIPT_DECODE
-
-# JScript versions of encoders
-($_JSencode10) = <<'END_JSCRIPT_ENCODE10';
- /* zero encoding */
- /* characters: 0123456789 */
- function($charCode) {
- return $charCode;
- };
-END_JSCRIPT_ENCODE10
-
-($_JSencode36) = <<'END_JSCRIPT_ENCODE36';
- /* inherent base36 support */
- /* characters: 0123456789abcdefghijklmnopqrstuvwxyz */
- function($charCode) {
- return $charCode.toString(36);
- };
-END_JSCRIPT_ENCODE36
-
-($_JSencode62) = <<'END_JSCRIPT_ENCODE62';
- /* hitch a ride on base36 and add the upper case alpha characters */
- /* characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ */
- function($charCode) {
- return ($charCode < _encoding ? '' : arguments.callee(parseInt($charCode / _encoding))) +
- (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36));
- };
-END_JSCRIPT_ENCODE62
-
-($_JSencode95) = <<'END_JSCRIPT_ENCODE95';
- /* use high-ascii values */
- /* characters: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ */
- function($charCode) {
- return ($charCode < _encoding ? '' : arguments.callee($charCode / _encoding)) +
- String.fromCharCode($charCode % _encoding + 161);
- };
-END_JSCRIPT_ENCODE95
-
-###########
-# END #
-###########
-1; # Pack #
-###########
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