String_Extension_HTML.swift

extension String {
	/// Returns the String with all special HTML characters encoded.
	public var stringByEncodingHTML: String {
		var ret = ""
		var g = self.unicodeScalars.generate()
		while let c = g.next() {
			if c < UnicodeScalar(0x0009) {
				ret.appendContentsOf("&#x");
				ret.append(UnicodeScalar(0x0030 + UInt32(c)));
				ret.appendContentsOf(";");
			} else if c == UnicodeScalar(0x0022) {
				ret.appendContentsOf("&quot;")
			} else if c == UnicodeScalar(0x0026) {
				ret.appendContentsOf("&amp;")
			} else if c == UnicodeScalar(0x0027) {
				ret.appendContentsOf("&#39;")
			} else if c == UnicodeScalar(0x003C) {
				ret.appendContentsOf("&lt;")
			} else if c == UnicodeScalar(0x003E) {
				ret.appendContentsOf("&gt;")
			} else if c > UnicodeScalar(126) {
				ret.appendContentsOf("&#\(UInt32(c));")
			} else {
				ret.append(c)
			}
		}
		return ret
	}
	
	/// Returns the String with all special URL characters encoded.
	public var stringByEncodingURL: String {
		var ret = ""
		var g = self.utf8.generate()
		while let c = g.next() {
			if c.shouldURLEncode {
				ret.append(UnicodeScalar(37))
				ret.appendContentsOf(c.hexString)
			} else {
				ret.append(UnicodeScalar(c))
			}
		}
		return ret
	}
}