/// <summary>
/// Zero encoding - just removal of whitespace and comments
/// </summary>
/// <param name="script">Script to compress</param>
/// <returns>Compressed script</returns>
private string BasicCompression(string script)
{
ParseMaster parser = new ParseMaster();
// make safe
parser.EscapeChar = '\\';
// protect strings
parser.Add("'[^'\\n\\r]*'", IGNORE);
parser.Add("\"[^\"\\n\\r]*\"", IGNORE);
// remove comments
parser.Add("\\/\\/[^\\n\\r]*[\\n\\r]");
parser.Add("\\/\\*[^*]*\\*+([^\\/][^*]*\\*+)*\\/");
// protect regular expressions
parser.Add("\\s+(\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?)", "$2");
parser.Add("[^\\w\\$\\/'\"*)\\?:]\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?", IGNORE);
// remove: ;;; doSomething();
if (_specialChars)
{
parser.Add(";;[^\\n\\r]+[\\n\\r]");
}
// remove redundant semi-colons
parser.Add(";+\\s*([};])", "$2");
// remove white-space
parser.Add("(\\b|\\$)\\s+(\\b|\\$)", "$2 $3");
parser.Add("([+\\-])\\s+([+\\-])", "$2 $3");
parser.Add("\\s+");
// done
return(parser.Exec(script));
}
private string encodeKeywords(string script)
{
// escape high-ascii values already in the script (i.e. in strings)
if (Encoding == PackerEncoding.HighAscii)
{
script = escape95(script);
}
// create the parser
ParseMaster parser = new ParseMaster();
EncodeMethod encode = getEncoder(Encoding);
// for high-ascii, don't encode single character low-ascii
Regex regex = new Regex(
(Encoding == PackerEncoding.HighAscii) ? "\\w\\w+" : "\\w+"
);
// build the word list
encodingLookup = analyze(script, regex, encode);
// encode
parser.Add((Encoding == PackerEncoding.HighAscii) ? "\\w\\w+" : "\\w+",
new ParseMaster.MatchGroupEvaluator(encodeWithLookup));
// if encoded, wrap the script in a decoding function
return((script == string.Empty) ? "" : bootStrap(parser.Exec(script), encodingLookup));
}
/// <summary>
/// Encodes special characters
/// </summary>
/// <param name="script">Script to encode</param>
/// <returns>Encoded script</returns>
private string EncodeSpecialChars(string script)
{
ParseMaster parser = new ParseMaster();
// replace: $name -> n, $$name -> na
parser.Add("((\\$+)([a-zA-Z\\$_]+))(\\d*)", new ParseMaster.MatchGroupEvaluator(EncodeLocalVars));
// replace: _name -> _0, double-underscore (__name) is ignored
Regex regex = new Regex("\\b_[A-Za-z\\d]\\w*");
// build the word list
_encodingLookup = Analyze(script, regex, EncodePrivate);
parser.Add("\\b_[A-Za-z\\d]\\w*", new ParseMaster.MatchGroupEvaluator(EncodeWithLookup));
script = parser.Exec(script);
return(script);
}