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msgpack-javascript/msgpack.codec.js at master · sapics/msgpack-javascript · GitHub
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/*!{id:msgpack.codec.js,ver:1.05,license:"MIT",author:"uupaa.js
@gmail
.com"}*/
// === msgpack ===
// MessagePack -> http://msgpack.sourceforge.net/
this
.
msgpack
||
(
function
(
globalScope
)
{
globalScope
.
msgpack
=
{
pack
:
msgpackpack
,
// msgpack.pack(data:Mix,
// toString:Boolean = false):ByteArray/ByteString/false
// [1][mix to String] msgpack.pack({}, true) -> "..."
// [2][mix to ByteArray] msgpack.pack({}) -> [...]
unpack
:
msgpackunpack
// msgpack.unpack(data:BinaryString/ByteArray):Mix
// [1][String to mix] msgpack.unpack("...") -> {}
// [2][ByteArray to mix] msgpack.unpack([...]) -> {}
}
;
var
_bin2num
=
{
}
,
// BinaryStringToNumber { "\00": 0, ... "\ff": 255 }
_num2bin
=
{
}
,
// NumberToBinaryString { 0: "\00", ... 255: "\ff" }
_buf
=
[
]
,
// decode buffer
_idx
=
0
,
// decode buffer[index]
_error
=
0
,
// msgpack.pack() error code. 1 = CYCLIC_REFERENCE_ERROR
_isArray
=
Array
.
isArray
||
(
function
(
mix
)
{
return
Object
.
prototype
.
toString
.
call
(
mix
)
===
"[object Array]"
;
}
)
,
_isUint8Array
=
function
(
mix
)
{
return
Object
.
prototype
.
toString
.
call
(
mix
)
===
"[object Uint8Array]"
;
}
,
_toString
=
String
.
fromCharCode
,
// CharCode/ByteArray to String
_MAX_DEPTH
=
512
;
// msgpack.pack
function
msgpackpack
(
data
,
//
@param
Mix:
toString
)
{
//
@param
Boolean(= false):
//
@return
ByteArray/BinaryString/false:
// false is error return
// [1][mix to String] msgpack.pack({}, true) -> "..."
// [2][mix to ByteArray] msgpack.pack({}) -> [...]
_error
=
0
;
var
byteArray
=
encode
(
[
]
,
data
,
0
)
;
return
_error
?
false
:
toString
?
byteArrayToByteString
(
byteArray
)
:
byteArray
;
}
// msgpack.unpack
function
msgpackunpack
(
data
)
{
//
@param
BinaryString/ByteArray:
//
@return
Mix/undefined:
// undefined is error return
// [1][String to mix] msgpack.unpack("...") -> {}
// [2][ByteArray to mix] msgpack.unpack([...]) -> {}
_buf
=
typeof
data
===
"string"
?
toByteArray
(
data
)
:
data
;
_idx
=
-
1
;
return
decode
(
)
;
// mix or undefined
}
// inner - encoder
function
encode
(
rv
,
//
@param
ByteArray: result
mix
,
//
@param
Mix: source data
depth
)
{
//
@param
Number: depth
var
size
,
i
,
iz
,
c
,
pos
,
// for UTF8.encode, Array.encode, Hash.encode
high
,
low
,
sign
,
exp
,
frac
;
// for IEEE754
if
(
mix
==
null
)
{
// null or undefined -> 0xc0 ( null )
rv
.
push
(
0xc0
)
;
}
else
if
(
mix
===
false
)
{
// false -> 0xc2 ( false )
rv
.
push
(
0xc2
)
;
}
else
if
(
mix
===
true
)
{
// true -> 0xc3 ( true )
rv
.
push
(
0xc3
)
;
}
else
{
switch
(
typeof
mix
)
{
case
"number"
:
if
(
mix
!==
mix
)
{
// isNaN
rv
.
push
(
0xcb
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
)
;
// quiet NaN
}
else
if
(
mix
===
Infinity
)
{
rv
.
push
(
0xcb
,
0x7f
,
0xf0
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
)
;
// positive infinity
}
else
if
(
Math
.
floor
(
mix
)
===
mix
)
{
// int or uint
if
(
mix
<
0
)
{
// int
if
(
mix
>=
-
32
)
{
// negative fixnum
rv
.
push
(
0xe0
+
mix
+
32
)
;
}
else
if
(
mix
>
-
0x80
)
{
rv
.
push
(
0xd0
,
mix
+
0x100
)
;
}
else
if
(
mix
>
-
0x8000
)
{
mix
+=
0x10000
;
rv
.
push
(
0xd1
,
mix
>>
8
,
mix
&
0xff
)
;
}
else
if
(
mix
>
-
0x80000000
)
{
mix
+=
0x100000000
;
rv
.
push
(
0xd2
,
mix
>>>
24
,
(
mix
>>
16
)
&
0xff
,
(
mix
>>
8
)
&
0xff
,
mix
&
0xff
)
;
}
else
{
high
=
Math
.
floor
(
mix
/
0x100000000
)
;
low
=
mix
&
0xffffffff
;
rv
.
push
(
0xd3
,
(
high
>>
24
)
&
0xff
,
(
high
>>
16
)
&
0xff
,
(
high
>>
8
)
&
0xff
,
high
&
0xff
,
(
low
>>
24
)
&
0xff
,
(
low
>>
16
)
&
0xff
,
(
low
>>
8
)
&
0xff
,
low
&
0xff
)
;
}
}
else
{
// uint
if
(
mix
<
0x80
)
{
rv
.
push
(
mix
)
;
// positive fixnum
}
else
if
(
mix
<
0x100
)
{
// uint 8
rv
.
push
(
0xcc
,
mix
)
;
}
else
if
(
mix
<
0x10000
)
{
// uint 16
rv
.
push
(
0xcd
,
mix
>>
8
,
mix
&
0xff
)
;
}
else
if
(
mix
<
0x100000000
)
{
// uint 32
rv
.
push
(
0xce
,
mix
>>>
24
,
(
mix
>>
16
)
&
0xff
,
(
mix
>>
8
)
&
0xff
,
mix
&
0xff
)
;
}
else
{
high
=
Math
.
floor
(
mix
/
0x100000000
)
;
low
=
mix
&
0xffffffff
;
rv
.
push
(
0xcf
,
(
high
>>
24
)
&
0xff
,
(
high
>>
16
)
&
0xff
,
(
high
>>
8
)
&
0xff
,
high
&
0xff
,
(
low
>>
24
)
&
0xff
,
(
low
>>
16
)
&
0xff
,
(
low
>>
8
)
&
0xff
,
low
&
0xff
)
;
}
}
}
else
{
// double
// THX!! @edvakf
// http://javascript.g.hatena.ne.jp/edvakf/20101128/1291000731
sign
=
mix
<
0
;
sign
&&
(
mix
*=
-
1
)
;
// add offset 1023 to ensure positive
// 0.6931471805599453 = Math.LN2;
exp
=
(
(
Math
.
log
(
mix
)
/
0.6931471805599453
)
+
1023
)
|
0
;
// shift 52 - (exp - 1023) bits to make integer part exactly 53 bits,
// then throw away trash less than decimal point
frac
=
mix
*
Math
.
pow
(
2
,
52
+
1023
-
exp
)
;
// S+-Exp(11)--++-----------------Fraction(52bits)-----------------------+
// || || |
// v+----------++--------------------------------------------------------+
// 00000000|00000000|00000000|00000000|00000000|00000000|00000000|00000000
// 6 5 55 4 4 3 2 1 8 0
// 3 6 21 8 0 2 4 6
//
// +----------high(32bits)-----------+ +----------low(32bits)------------+
// | | | |
// +---------------------------------+ +---------------------------------+
// 3 2 21 1 8 0
// 1 4 09 6
low
=
frac
&
0xffffffff
;
sign
&&
(
exp
|=
0x800
)
;
high
=
(
(
frac
/
0x100000000
)
&
0xfffff
)
|
(
exp
<<
20
)
;
rv
.
push
(
0xcb
,
(
high
>>
24
)
&
0xff
,
(
high
>>
16
)
&
0xff
,
(
high
>>
8
)
&
0xff
,
high
&
0xff
,
(
low
>>
24
)
&
0xff
,
(
low
>>
16
)
&
0xff
,
(
low
>>
8
)
&
0xff
,
low
&
0xff
)
;
}
break
;
case
"string"
:
// http://d.hatena.ne.jp/uupaa/20101128
iz
=
mix
.
length
;
pos
=
rv
.
length
;
// keep rewrite position
rv
.
push
(
0
)
;
// placeholder
// utf8.encode
for
(
i
=
0
;
i
<
iz
;
++
i
)
{
c
=
mix
.
charCodeAt
(
i
)
;
if
(
c
<
0x80
)
{
// ASCII(0x00 ~ 0x7f)
rv
.
push
(
c
&
0x7f
)
;
}
else
if
(
c
<
0x0800
)
{
rv
.
push
(
(
(
c
>>>
6
)
&
0x1f
)
|
0xc0
,
(
c
&
0x3f
)
|
0x80
)
;
}
else
if
(
c
<
0x10000
)
{
rv
.
push
(
(
(
c
>>>
12
)
&
0x0f
)
|
0xe0
,
(
(
c
>>>
6
)
&
0x3f
)
|
0x80
,
(
c
&
0x3f
)
|
0x80
)
;
}
}
size
=
rv
.
length
-
pos
-
1
;
if
(
size
<
32
)
{
rv
[
pos
]
=
0xa0
+
size
;
// rewrite
}
else
if
(
size
<
0x100
)
{
// 8
rv
.
splice
(
pos
,
1
,
0xd9
,
size
)
;
}
else
if
(
size
<
0x10000
)
{
// 16
rv
.
splice
(
pos
,
1
,
0xda
,
size
>>
8
,
size
&
0xff
)
;
}
else
if
(
size
<
0x100000000
)
{
// 32
rv
.
splice
(
pos
,
1
,
0xdb
,
size
>>>
24
,
(
size
>>
16
)
&
0xff
,
(
size
>>
8
)
&
0xff
,
size
&
0xff
)
;
}
break
;
default
:
// array, hash, or Uint8Array
if
(
_isUint8Array
(
mix
)
)
{
size
=
mix
.
length
;
if
(
size
<
0x100
)
{
// 8
rv
.
push
(
0xc4
,
size
)
;
}
else
if
(
size
<
0x10000
)
{
// 16
rv
.
push
(
0xc5
,
size
>>
8
,
size
&
0xff
)
;
}
else
if
(
size
<
0x100000000
)
{
// 32
rv
.
push
(
0xc6
,
size
>>>
24
,
(
size
>>
16
)
&
0xff
,
(
size
>>
8
)
&
0xff
,
size
&
0xff
)
;
}
Array
.
prototype
.
push
.
apply
(
rv
,
mix
)
;
break
;
}
if
(
++
depth
>=
_MAX_DEPTH
)
{
_error
=
1
;
// CYCLIC_REFERENCE_ERROR
return
rv
=
[
]
;
// clear
}
if
(
_isArray
(
mix
)
)
{
size
=
mix
.
length
;
if
(
size
<
16
)
{
rv
.
push
(
0x90
+
size
)
;
}
else
if
(
size
<
0x10000
)
{
// 16
rv
.
push
(
0xdc
,
size
>>
8
,
size
&
0xff
)
;
}
else
if
(
size
<
0x100000000
)
{
// 32
rv
.
push
(
0xdd
,
size
>>>
24
,
(
size
>>
16
)
&
0xff
,
(
size
>>
8
)
&
0xff
,
size
&
0xff
)
;
}
for
(
i
=
0
;
i
<
size
;
++
i
)
{
encode
(
rv
,
mix
[
i
]
,
depth
)
;
}
}
else
{
// hash
// http://d.hatena.ne.jp/uupaa/20101129
pos
=
rv
.
length
;
// keep rewrite position
rv
.
push
(
0
)
;
// placeholder
size
=
0
;
for
(
i
in
mix
)
{
++
size
;
encode
(
rv
,
i
,
depth
)
;
encode
(
rv
,
mix
[
i
]
,
depth
)
;
}
if
(
size
<
16
)
{
rv
[
pos
]
=
0x80
+
size
;
// rewrite
}
else
if
(
size
<
0x10000
)
{
// 16
rv
.
splice
(
pos
,
1
,
0xde
,
size
>>
8
,
size
&
0xff
)
;
}
else
if
(
size
<
0x100000000
)
{
// 32
rv
.
splice
(
pos
,
1
,
0xdf
,
size
>>>
24
,
(
size
>>
16
)
&
0xff
,
(
size
>>
8
)
&
0xff
,
size
&
0xff
)
;
}
}
}
}
return
rv
;
}
// inner - decoder
function
decode
(
)
{
//
@return
Mix:
var
size
,
i
,
iz
,
c
,
num
=
0
,
sign
,
exp
,
frac
,
ary
,
hash
,
buf
=
_buf
,
type
=
buf
[
++
_idx
]
;
if
(
type
>=
0xe0
)
{
// Negative FixNum (111x xxxx) (-32 ~ -1)
return
type
-
0x100
;
}
if
(
type
<
0xc0
)
{
if
(
type
<
0x80
)
{
// Positive FixNum (0xxx xxxx) (0 ~ 127)
return
type
;
}
if
(
type
<
0x90
)
{
// FixMap (1000 xxxx)
num
=
type
-
0x80
;
type
=
0x80
;
}
else
if
(
type
<
0xa0
)
{
// FixArray (1001 xxxx)
num
=
type
-
0x90
;
type
=
0x90
;
}
else
{
// if (type < 0xc0) { // FixRaw (101x xxxx)
num
=
type
-
0xa0
;
type
=
0xa0
;
}
}
switch
(
type
)
{
case
0xc0
:
return
null
;
case
0xc2
:
return
false
;
case
0xc3
:
return
true
;
case
0xca
:
// float
num
=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
+
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
sign
=
num
&
0x80000000
;
// 1bit
exp
=
(
num
>>
23
)
&
0xff
;
// 8bits
frac
=
num
&
0x7fffff
;
// 23bits
if
(
!
num
||
num
===
0x80000000
)
{
// 0.0 or -0.0
return
0
;
}
if
(
exp
===
0xff
)
{
// NaN or Infinity
return
frac
?
NaN
:
Infinity
;
}
return
(
sign
?
-
1
:
1
)
*
(
frac
|
0x800000
)
*
Math
.
pow
(
2
,
exp
-
127
-
23
)
;
// 127: bias
case
0xcb
:
// double
num
=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
+
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
sign
=
num
&
0x80000000
;
// 1bit
exp
=
(
num
>>
20
)
&
0x7ff
;
// 11bits
frac
=
num
&
0xfffff
;
// 52bits - 32bits (high word)
if
(
!
num
||
num
===
0x80000000
)
{
// 0.0 or -0.0
_idx
+=
4
;
return
0
;
}
if
(
exp
===
0x7ff
)
{
// NaN or Infinity
_idx
+=
4
;
return
frac
?
NaN
:
Infinity
;
}
num
=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
+
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
return
(
sign
?
-
1
:
1
)
*
(
(
frac
|
0x100000
)
*
Math
.
pow
(
2
,
exp
-
1023
-
20
)
// 1023: bias
+
num
*
Math
.
pow
(
2
,
exp
-
1023
-
52
)
)
;
// 0xcf: uint64, 0xce: uint32, 0xcd: uint16
case
0xcf
:
num
=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
+
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
return
num
*
0x100000000
+
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
+
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
case
0xce
:
num
+=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
;
case
0xcd
:
num
+=
buf
[
++
_idx
]
<<
8
;
case
0xcc
:
return
num
+
buf
[
++
_idx
]
;
// 0xd3: int64, 0xd2: int32, 0xd1: int16, 0xd0: int8
case
0xd3
:
num
=
buf
[
++
_idx
]
;
if
(
num
&
0x80
)
{
// sign -> avoid overflow
return
(
(
num
^
0xff
)
*
0x100000000000000
+
(
buf
[
++
_idx
]
^
0xff
)
*
0x1000000000000
+
(
buf
[
++
_idx
]
^
0xff
)
*
0x10000000000
+
(
buf
[
++
_idx
]
^
0xff
)
*
0x100000000
+
(
buf
[
++
_idx
]
^
0xff
)
*
0x1000000
+
(
buf
[
++
_idx
]
^
0xff
)
*
0x10000
+
(
buf
[
++
_idx
]
^
0xff
)
*
0x100
+
(
buf
[
++
_idx
]
^
0xff
)
+
1
)
*
-
1
;
}
return
num
*
0x100000000000000
+
buf
[
++
_idx
]
*
0x1000000000000
+
buf
[
++
_idx
]
*
0x10000000000
+
buf
[
++
_idx
]
*
0x100000000
+
buf
[
++
_idx
]
*
0x1000000
+
buf
[
++
_idx
]
*
0x10000
+
buf
[
++
_idx
]
*
0x100
+
buf
[
++
_idx
]
;
case
0xd2
:
num
=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
+
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
return
num
<
0x80000000
?
num
:
num
-
0x100000000
;
// 0x80000000 * 2
case
0xd1
:
num
=
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
return
num
<
0x8000
?
num
:
num
-
0x10000
;
// 0x8000 * 2
case
0xd0
:
num
=
buf
[
++
_idx
]
;
return
num
<
0x80
?
num
:
num
-
0x100
;
// 0x80 * 2
// 0xdb: str32, 0xda: str16, 0xd9: str8, 0xa0: fixstr
case
0xdb
:
num
+=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
;
case
0xda
:
num
+=
buf
[
++
_idx
]
<<
8
;
case
0xd9
:
num
+=
buf
[
++
_idx
]
;
case
0xa0
:
// utf8.decode
for
(
ary
=
[
]
,
i
=
_idx
,
iz
=
i
+
num
;
i
<
iz
;
)
{
c
=
buf
[
++
i
]
;
// lead byte
ary
.
push
(
c
<
0x80
?
c
:
// ASCII(0x00 ~ 0x7f)
c
<
0xe0
?
(
(
c
&
0x1f
)
<<
6
|
(
buf
[
++
i
]
&
0x3f
)
)
:
(
(
c
&
0x0f
)
<<
12
|
(
buf
[
++
i
]
&
0x3f
)
<<
6
|
(
buf
[
++
i
]
&
0x3f
)
)
)
;
}
_idx
=
i
;
return
ary
.
length
<
10240
?
_toString
.
apply
(
null
,
ary
)
:
byteArrayToByteString
(
ary
)
;
// 0xc6: bin32, 0xc5: bin16, 0xc4: bin8
case
0xc6
:
num
+=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
;
case
0xc5
:
num
+=
buf
[
++
_idx
]
<<
8
;
case
0xc4
:
num
+=
buf
[
++
_idx
]
;
var
end
=
++
_idx
+
num
var
ret
=
buf
.
slice
(
_idx
,
end
)
;
_idx
+=
num
;
return
ret
;
// 0xdf: map32, 0xde: map16, 0x80: map
case
0xdf
:
num
+=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
;
case
0xde
:
num
+=
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
case
0x80
:
hash
=
{
}
;
while
(
num
--
)
{
// make key/value pair
size
=
buf
[
++
_idx
]
-
0xa0
;
for
(
ary
=
[
]
,
i
=
_idx
,
iz
=
i
+
size
;
i
<
iz
;
)
{
c
=
buf
[
++
i
]
;
// lead byte
ary
.
push
(
c
<
0x80
?
c
:
// ASCII(0x00 ~ 0x7f)
c
<
0xe0
?
(
(
c
&
0x1f
)
<<
6
|
(
buf
[
++
i
]
&
0x3f
)
)
:
(
(
c
&
0x0f
)
<<
12
|
(
buf
[
++
i
]
&
0x3f
)
<<
6
|
(
buf
[
++
i
]
&
0x3f
)
)
)
;
}
_idx
=
i
;
hash
[
_toString
.
apply
(
null
,
ary
)
]
=
decode
(
)
;
}
return
hash
;
// 0xdd: array32, 0xdc: array16, 0x90: array
case
0xdd
:
num
+=
buf
[
++
_idx
]
*
0x1000000
+
(
buf
[
++
_idx
]
<<
16
)
;
case
0xdc
:
num
+=
(
buf
[
++
_idx
]
<<
8
)
+
buf
[
++
_idx
]
;
case
0x90
:
ary
=
[
]
;
while
(
num
--
)
{
ary
.
push
(
decode
(
)
)
;
}
return
ary
;
}
return
;
}
// inner - byteArray To ByteString
function
byteArrayToByteString
(
byteArray
)
{
//
@param
ByteArray
//
@return
String
// http://d.hatena.ne.jp/uupaa/20101128
try
{
return
_toString
.
apply
(
this
,
byteArray
)
;
// toString
}
catch
(
err
)
{
;
// avoid "Maximum call stack size exceeded"
}
var
rv
=
[
]
,
i
=
0
,
iz
=
byteArray
.
length
,
num2bin
=
_num2bin
;
for
(
;
i
<
iz
;
++
i
)
{
rv
[
i
]
=
num2bin
[
byteArray
[
i
]
]
;
}
return
rv
.
join
(
""
)
;
}
// inner - BinaryString To ByteArray
function
toByteArray
(
data
)
{
//
@param
BinaryString: "\00\01"
//
@return
ByteArray: [0x00, 0x01]
var
rv
=
[
]
,
bin2num
=
_bin2num
,
remain
,
ary
=
data
.
split
(
""
)
,
i
=
-
1
,
iz
;
iz
=
ary
.
length
;
remain
=
iz
%
8
;
while
(
remain
--
)
{
++
i
;
rv
[
i
]
=
bin2num
[
ary
[
i
]
]
;
}
remain
=
iz
>>
3
;
while
(
remain
--
)
{
rv
.
push
(
bin2num
[
ary
[
++
i
]
]
,
bin2num
[
ary
[
++
i
]
]
,
bin2num
[
ary
[
++
i
]
]
,
bin2num
[
ary
[
++
i
]
]
,
bin2num
[
ary
[
++
i
]
]
,
bin2num
[
ary
[
++
i
]
]
,
bin2num
[
ary
[
++
i
]
]
,
bin2num
[
ary
[
++
i
]
]
)
;
}
return
rv
;
}
// --- init ---
(
function
(
)
{
var
i
=
0
,
v
;
for
(
;
i
<
0x100
;
++
i
)
{
v
=
_toString
(
i
)
;
_bin2num
[
v
]
=
i
;
// "\00" -> 0x00
_num2bin
[
i
]
=
v
;
// 0 -> "\00"
}
// http://twitter.com/edvakf/statuses/15576483807
for
(
i
=
0x80
;
i
<
0x100
;
++
i
)
{
// [Webkit][Gecko]
_bin2num
[
_toString
(
0xf700
+
i
)
]
=
i
;
// "\f780" -> 0x80
}
}
)
(
)
;
}
)
(
this
)
;
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