import base64

def encodeHex(plainStr):
	return base64.b16encode(plainStr)
def encodeHex_Generic(plainStr, char = '', end = ''):
	buff16 = ""
	for c in plainStr:
		buff16 += (char + base64.b16encode(c) + end)
	return buff16
def encodeHex_Shell(plainStr):
	return encodeHex_Generic(plainStr, '\\x')
def encodeHex_Html(plainStr):
	return encodeHex_Generic(plainStr, '&#', ';')
def encodeHex_Url(plainStr):
	return encodeHex_Generic(plainStr, '%')
def decodeHex(hexStr):
	return base64.b16decode(hexStr.upper())
def decodeHex_Generic(hexStr, char = '', end = ''):
	hexStr = hexStr.replace(char, '')
	if end != '':
		hexStr = hexStr.replace(end, '')
	return decodeHex(hexStr)
def decodeHex_Shell(hexStr):
	return decodeHex_Generic(hexStr,'\\x')
def decodeHex_Html(hexStr):
	return decodeHex_Generic(hexStr,'&#', ';')
def decodeHex_Url(hexStr):
	return decodeHex_Generic(hexStr,'%')
# Base-64
def encodeB64(plainStr):
	return base64.b64encode(plainStr)
def encodeB64_UrlSafe(plainStr):
	return base64.urlsafe_b64encode(plainStr)
def decodeB64(b64Str):
	return base64.b64decode(b64Str)
def decodeB64_UrlSafe(plainStr):
	return base64.urlsafe_b64decode(plainStr)
# Latin-1
def encodeLatin(plainStr):
	return plainStr.encode('latin-1')
def decodeLatin(plainStr):
	return unicode(plainStr, 'latin-1')
# UTF-8
def encodeUTF8(plainStr):
	return plainStr.encode('utf8')
def decodeUTF8(plainStr):
	return unicode(plainStr, 'utf8')
# UTF-7
def encodeUTF7(plainStr):
	return plainStr.encode('utf7')
def decodeUTF7(plainStr):
	return unicode(plainStr, 'utf7')
# UTF-16
def encodeUTF16(plainStr):
	return plainStr.encode('utf16')
def decodeUTF16(plainStr):
	return unicode(plainStr, 'utf16')
# HTML
def encodeHTML(s):
 	s = s.replace("&", "&")
	s = s.replace("<", "&lt;")
	s = s.replace(">", "&gt;")
	s = s.replace("\"","&quot;")
	s = s.replace("'", "&apos;")
	return s
def decodeHTML(s):
	s = s.replace("&lt;", "<")
	s = s.replace("&gt;", ">")
	s = s.replace("&quot;", "\"")
	s = s.replace("&apos;","'")
	s = s.replace("&amp;", "&")
	return s

possibleCharsets=["Hex","Hex-Url","Hex-Shell","Hex-Html","Base64","Latin1","UTF-8","UTF-7","UTF-16", "Html"]

fctEncode = [encodeHex,encodeHex_Url,encodeHex_Shell,encodeHex_Html,encodeB64,encodeLatin,encodeUTF8,encodeUTF7,encodeUTF16,encodeHTML]
fctDecode = [decodeHex,decodeHex_Url,decodeHex_Shell,decodeHex_Html,decodeB64,decodeLatin,decodeUTF8,decodeUTF7,decodeUTF16,decodeHTML]

def convert(string, fromCharset, toCharset):
	if fromCharset != toCharset:
		# find the position of the charset
		posFrom, posTo = 0,0
		try:
			posFrom = possibleCharsets.index(fromCharset)
			posTo  = possibleCharsets.index(toCharset)
		except:
			print "Error in charset name"
		encodeF = fctEncode[posTo]
		decodeF = fctDecode[posFrom]
		ret = string
		try:
			if fromCharset != 'Unicode':
				ret = decodeF(ret)
			ret = encodeF(ret)
			return ret
		except:
			print "Error in encoding/decoding"
	return string