var QueryString = exports; 
var urlDecode = process.binding('http_parser').urlDecode; 
function charCode(c){ 
return c.charCodeAt(0); 
} 
QueryString.unescapeBuffer = function (s, decodeSpaces){ 
var out = new Buffer((_AN_Read_length('length', s))); 
var state = 'CHAR'; 
var n, m, hexchar; 
for (var inIndex = 0, outIndex = 0; 
inIndex <= _AN_Read_length('length', s); inIndex++ ){ 
var c = s.charCodeAt(inIndex); 
switch (state){ 
case 'CHAR': switch (c){ 
case charCode('%'): n = 0; 
m = 0; 
state = 'HEX0'; 
break ; 
case charCode('+'): if (decodeSpaces) c = charCode(' '); 
default : { 
out[outIndex++ ] = c; 
break ; 
} 
} 
break ; 
case 'HEX0': state = 'HEX1'; 
hexchar = c; 
if (charCode('0') <= c && c <= charCode('9')) { 
n = c - charCode('0'); 
} 
 else if (charCode('a') <= c && c <= charCode('f')) { 
n = c - charCode('a') + 10; 
} 
 else if (charCode('A') <= c && c <= charCode('F')) { 
n = c - charCode('A') + 10; 
} 
 else { 
out[outIndex++ ] = charCode('%'); 
out[outIndex++ ] = c; 
state = 'CHAR'; 
break ; 
} 
break ; 
case 'HEX1': state = 'CHAR'; 
if (charCode('0') <= c && c <= charCode('9')) { 
m = c - charCode('0'); 
} 
 else if (charCode('a') <= c && c <= charCode('f')) { 
m = c - charCode('a') + 10; 
} 
 else if (charCode('A') <= c && c <= charCode('F')) { 
m = c - charCode('A') + 10; 
} 
 else { 
out[outIndex++ ] = charCode('%'); 
out[outIndex++ ] = hexchar; 
out[outIndex++ ] = c; 
break ; 
} 
out[outIndex++ ] = 16 * n + m; 
break ; 
} 
} 
return out.slice(0, outIndex - 1); 
} 
; 
QueryString.unescape = function (s, decodeSpaces){ 
return QueryString.unescapeBuffer(s, decodeSpaces).toString(); 
} 
; 
QueryString.escape = function (str){ 
return encodeURIComponent(str); 
} 
; 
var stringifyPrimitive = function (v){ 
switch (typeof v){ 
case 'string': return v; 
case 'boolean': return v? 'true': 'false'; 
case 'number': return isFinite(v)? v: ''; 
default : { 
return ''; 
} 
} 
} 
; 
QueryString.stringify = QueryString.encode = function (obj, sep, eq, name){ 
sep = sep || '&'; 
eq = eq || '='; 
obj = (obj === null )? undefined: obj; 
switch (typeof obj){ 
case 'object': return Object.keys(obj).map(function (k){ 
if (Array.isArray(obj[k])) { 
return obj[k].map(function (v){ 
return QueryString.escape(stringifyPrimitive(k)) + eq + QueryString.escape(stringifyPrimitive(v)); 
} 
).join(sep); 
} 
 else { 
return QueryString.escape(stringifyPrimitive(k)) + eq + QueryString.escape(stringifyPrimitive(obj[k])); 
} 
} 
).join(sep); 
default : { 
if (!name) return ''; 
return QueryString.escape(stringifyPrimitive(name)) + eq + QueryString.escape(stringifyPrimitive(obj)); 
} 
} 
} 
; 
QueryString.parse = QueryString.decode = function (qs, sep, eq){ 
sep = sep || '&'; 
eq = eq || '='; 
var obj = { 
}
; 
if (typeof qs !== 'string' || _AN_Read_length('length', qs) === 0) { 
return obj; 
} 
qs.split(sep).forEach(function (kvp){ 
var x = kvp.split(eq); 
var k = QueryString.unescape(x[0], true ); 
var v = QueryString.unescape(x.slice(1).join(eq), true ); 
if (!(k in obj)) { 
obj[k] = v; 
} 
 else if (!Array.isArray(obj[k])) { 
obj[k] = [obj[k], v] ; 
} 
 else { 
obj[k].push(v); 
} 
} 
); 
return obj; 
} 
;