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#
include
"
node.h
"
#
include
"
string_bytes.h
"
#
include
"
util-inl.h
"
#
include
"
v8.h
"
namespace
node
{
using
v8::HandleScope;
using
v8::Isolate;
using
v8::Local;
using
v8::MaybeLocal;
using
v8::TryCatch;
using
v8::Value;
enum
encoding
ParseEncoding
(
const
char
* encoding,
enum
encoding default_encoding) {
switch
(encoding[
0
]) {
case
'
u
'
:
case
'
U
'
:
//
Note: the two first conditions are needed for performance reasons
//
as "utf8"/"utf-8" is a common case.
//
(same for other cases below)
//
utf8, utf16le
if
(encoding[
1
] ==
'
t
'
&& encoding[
2
] ==
'
f
'
) {
//
Skip `-`
const
size_t
skip = encoding[
3
] ==
'
-
'
?
4
:
3
;
if
(encoding[skip] ==
'
8
'
&& encoding[skip +
1
] ==
'
\0
'
)
return
UTF8
;
if
(
strncmp
(encoding + skip,
"
16le
"
,
5
) ==
0
)
return
UCS2
;
//
ucs2
}
else
if
(encoding[
1
] ==
'
c
'
&& encoding[
2
] ==
'
s
'
) {
const
size_t
skip = encoding[
3
] ==
'
-
'
?
4
:
3
;
if
(encoding[skip] ==
'
2
'
&& encoding[skip +
1
] ==
'
\0
'
)
return
UCS2
;
}
if
(
StringEqualNoCase
(encoding,
"
utf8
"
))
return
UTF8
;
if
(
StringEqualNoCase
(encoding,
"
utf-8
"
))
return
UTF8
;
if
(
StringEqualNoCase
(encoding,
"
ucs2
"
))
return
UCS2
;
if
(
StringEqualNoCase
(encoding,
"
ucs-2
"
))
return
UCS2
;
if
(
StringEqualNoCase
(encoding,
"
utf16le
"
))
return
UCS2
;
if
(
StringEqualNoCase
(encoding,
"
utf-16le
"
))
return
UCS2
;
break
;
case
'
l
'
:
case
'
L
'
:
//
latin1
if
(encoding[
1
] ==
'
a
'
) {
if
(
strncmp
(encoding +
2
,
"
tin1
"
,
5
) ==
0
)
return
LATIN1
;
}
if
(
StringEqualNoCase
(encoding,
"
latin1
"
))
return
LATIN1
;
break
;
case
'
b
'
:
case
'
B
'
:
//
binary is a deprecated alias of latin1
if
(encoding[
1
] ==
'
i
'
) {
if
(
strncmp
(encoding +
2
,
"
nary
"
,
5
) ==
0
)
return
LATIN1
;
//
buffer
}
else
if
(encoding[
1
] ==
'
u
'
) {
if
(
strncmp
(encoding +
2
,
"
ffer
"
,
5
) ==
0
)
return
BUFFER
;
//
base64
}
else
if
(encoding[
1
] ==
'
a
'
) {
if
(
strncmp
(encoding +
2
,
"
se64
"
,
5
) ==
0
)
return
BASE64
;
if
(
strncmp
(encoding +
2
,
"
se64url
"
,
8
) ==
0
)
return
BASE64URL
;
}
if
(
StringEqualNoCase
(encoding,
"
binary
"
))
return
LATIN1
;
//
BINARY is a deprecated alias of LATIN1.
if
(
StringEqualNoCase
(encoding,
"
buffer
"
))
return
BUFFER
;
if
(
StringEqualNoCase
(encoding,
"
base64
"
))
return
BASE64
;
if
(
StringEqualNoCase
(encoding,
"
base64url
"
))
return
BASE64URL
;
break
;
case
'
a
'
:
case
'
A
'
:
//
ascii
if
(encoding[
1
] ==
'
s
'
) {
if
(
strncmp
(encoding +
2
,
"
cii
"
,
4
) ==
0
)
return
ASCII
;
}
if
(
StringEqualNoCase
(encoding,
"
ascii
"
))
return
ASCII
;
break
;
case
'
h
'
:
case
'
H
'
:
//
hex
if
(encoding[
1
] ==
'
e
'
)
if
(encoding[
2
] ==
'
x
'
&& encoding[
3
] ==
'
\0
'
)
return
HEX
;
if
(
StringEqualNoCase
(encoding,
"
hex
"
))
return
HEX
;
break
;
}
return
default_encoding;
}
enum
encoding
ParseEncoding
(Isolate* isolate,
Local<Value> encoding_v,
Local<Value> encoding_id,
enum
encoding default_encoding) {
if
(encoding_id->
IsUint32
()) {
return
static_cast
<
enum
encoding>(encoding_id.
As
<v8::Uint32>()->
Value
());
}
return
ParseEncoding
(isolate, encoding_v, default_encoding);
}
enum
encoding
ParseEncoding
(Isolate* isolate,
Local<Value> encoding_v,
enum
encoding default_encoding) {
CHECK
(!encoding_v.
IsEmpty
());
if
(!encoding_v->
IsString
())
return
default_encoding;
Utf8Value
encoding
(isolate, encoding_v);
return
ParseEncoding
(*encoding, default_encoding);
}
MaybeLocal<Value>
TryEncode
(Isolate* isolate,
const
char
* buf,
size_t
len,
enum
encoding encoding) {
CHECK_NE
(encoding,
UCS2
);
return
StringBytes::Encode
(isolate, buf, len, encoding);
}
MaybeLocal<Value>
TryEncode
(Isolate* isolate,
const
uint16_t
* buf,
size_t
len) {
return
StringBytes::Encode
(isolate, buf, len);
}
Local<Value>
Encode
(Isolate* isolate,
const
char
* buf,
size_t
len,
enum
encoding encoding) {
CHECK_NE
(encoding,
UCS2
);
TryCatch
try_catch
(isolate);
return
StringBytes::Encode
(isolate, buf, len, encoding).
ToLocalChecked
();
}
Local<Value>
Encode
(Isolate* isolate,
const
uint16_t
* buf,
size_t
len) {
TryCatch
try_catch
(isolate);
return
StringBytes::Encode
(isolate, buf, len).
ToLocalChecked
();
}
//
Returns -1 if the handle was not valid for decoding
ssize_t
DecodeBytes
(Isolate* isolate,
Local<Value> val,
enum
encoding encoding) {
HandleScope
scope
(isolate);
return
StringBytes::Size
(isolate, val, encoding).
FromMaybe
(-
1
);
}
//
Returns number of bytes written.
ssize_t
DecodeWrite
(Isolate* isolate,
char
* buf,
size_t
buflen,
Local<Value> val,
enum
encoding encoding) {
return
StringBytes::Write
(isolate, buf, buflen, val, encoding);
}
}
//
namespace node
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