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nexedi
neoppod
Commits
e6779822
Commit
e6779822
authored
Sep 04, 2017
by
Kirill Smelkov
Browse files
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.
parent
ea297397
Changes
2
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2 changed files
with
68 additions
and
16 deletions
+68
-16
go/neo/proto.go
go/neo/proto.go
+49
-4
go/neo/protogen.go
go/neo/protogen.go
+19
-12
No files found.
go/neo/proto.go
View file @
e6779822
...
@@ -243,15 +243,22 @@ func (a *Address) neoEncode(b []byte) int {
...
@@ -243,15 +243,22 @@ func (a *Address) neoEncode(b []byte) int {
return
n
return
n
}
}
func
(
a
*
Address
)
neoDecode
(
b
[]
byte
)
int
{
func
(
a
*
Address
)
neoDecode
(
b
[]
byte
)
(
int
,
bool
)
{
n
:=
string_neoDecode
(
&
a
.
Host
,
b
)
n
,
ok
:=
string_neoDecode
(
&
a
.
Host
,
b
)
if
!
ok
{
return
0
,
false
}
if
a
.
Host
!=
""
{
if
a
.
Host
!=
""
{
b
=
b
[
n
:
]
if
len
(
b
)
<
2
{
return
0
,
false
}
a
.
Port
=
binary
.
BigEndian
.
Uint16
(
b
[
n
:
])
a
.
Port
=
binary
.
BigEndian
.
Uint16
(
b
[
n
:
])
n
+=
2
n
+=
2
}
else
{
}
else
{
a
.
Port
=
0
a
.
Port
=
0
}
}
return
n
return
n
,
true
}
}
// Checksum is a SHA1 hash.
// Checksum is a SHA1 hash.
...
@@ -1010,7 +1017,16 @@ type Truncate struct {
...
@@ -1010,7 +1017,16 @@ type Truncate struct {
// XXX _answer = Error
// XXX _answer = Error
}
}
// ---- runtime support for protogen and custom encodings ----
// ---- runtime support for protogen and custom codecs ----
// customCodec is the interface that is implemented by types with custom encodings.
//
// its semantic is very similar to Msg.
type
customCodec
interface
{
neoEncodedLen
()
int
neoEncode
(
buf
[]
byte
)
(
nwrote
int
)
neoDecode
(
data
[]
byte
)
(
nread
int
,
ok
bool
)
}
func
byte2bool
(
b
byte
)
bool
{
func
byte2bool
(
b
byte
)
bool
{
return
b
!=
0
return
b
!=
0
...
@@ -1042,3 +1058,32 @@ func float64_NEODecode(b []byte) float64 {
...
@@ -1042,3 +1058,32 @@ func float64_NEODecode(b []byte) float64 {
fu
:=
binary
.
BigEndian
.
Uint64
(
b
)
fu
:=
binary
.
BigEndian
.
Uint64
(
b
)
return
math
.
Float64frombits
(
fu
)
return
math
.
Float64frombits
(
fu
)
}
}
// XXX we need string_neo* only for Address
// XXX dup of genSlice1 in protogen.go
func
string_neoEncodedLen
(
s
string
)
int
{
return
4
+
len
(
s
)
}
func
string_neoEncode
(
s
string
,
data
[]
byte
)
int
{
l
:=
len
(
s
)
binary
.
BigEndian
.
PutUint32
(
data
,
uint32
(
l
))
copy
(
data
[
4
:
4
+
l
],
s
)
// NOTE [:l] to catch data overflow as copy copies minimal len
return
4
+
l
}
func
string_neoDecode
(
sp
*
string
,
data
[]
byte
)
(
nread
int
,
ok
bool
)
{
if
len
(
data
)
<
4
{
return
0
,
false
}
l
:=
binary
.
BigEndian
.
Uint32
(
data
)
data
=
data
[
4
:
]
if
uint32
(
len
(
data
))
<
l
{
return
0
,
false
}
*
sp
=
string
(
data
[
:
l
])
return
4
+
int
(
l
),
true
}
go/neo/protogen.go
View file @
e6779822
...
@@ -438,9 +438,9 @@ type CodeGenerator interface {
...
@@ -438,9 +438,9 @@ type CodeGenerator interface {
genArray1
(
path
string
,
typ
*
types
.
Array
)
genArray1
(
path
string
,
typ
*
types
.
Array
)
genSlice1
(
path
string
,
typ
types
.
Type
)
genSlice1
(
path
string
,
typ
types
.
Type
)
// generate code for a custom type which implements its own
encoding/decodeing
// generate code for a custom type which implements its own
//
XXX review text
//
encoding/decoding via implementing neo.customCodec interface.
genCustom
(
path
string
,
typ
types
.
Type
)
// XXX + obj?
genCustom
(
path
string
)
// get generated code.
// get generated code.
generatedCode
()
string
generatedCode
()
string
...
@@ -1068,25 +1068,32 @@ func (d *decoder) genMap(assignto string, typ *types.Map, obj types.Object) {
...
@@ -1068,25 +1068,32 @@ func (d *decoder) genMap(assignto string, typ *types.Map, obj types.Object) {
}
}
// emit code to size/encode/decode custom type
// emit code to size/encode/decode custom type
// XXX typ not needed
func
(
s
*
sizer
)
genCustom
(
path
string
)
{
func
(
s
*
sizer
)
genCustom
(
path
string
,
typ
*
types
.
Type
)
{
s
.
size
.
AddExpr
(
"%s.neoEncodedLen()"
,
path
)
s
.
size
.
AddExpr
(
"%s.neoEncodedLen()"
,
path
)
}
}
// XXX typ unused
func
(
e
*
encoder
)
genCustom
(
path
string
)
{
func
(
e
*
encoder
)
genCustom
(
path
string
,
typ
*
types
.
Type
)
{
e
.
emit
(
"{"
)
e
.
emit
(
"{"
)
e
.
emit
(
"n := %s.neoEncodedLen()"
,
path
)
e
.
emit
(
"n := %s.neoEncode(data[%v:])"
,
e
.
n
)
e
.
emit
(
"%s.neoEncode(data[%v:])"
,
e
.
n
)
e
.
emit
(
"data = data[%v + n:]"
,
e
.
n
)
e
.
emit
(
"data = data[%v + n:]"
,
e
.
n
)
e
.
emit
(
"}"
)
e
.
emit
(
"}"
)
e
.
n
=
0
e
.
n
=
0
}
}
func
(
e
*
decoder
)
genCustom
(
path
string
)
{
func
(
d
*
decoder
)
genCustom
(
path
string
)
{
// make sure we check for overflow previous-code before proceeding to custom decoder.
d
.
overflowCheck
()
d
.
resetPos
()
d
.
emit
(
"{"
)
d
.
emit
(
"{"
)
d
.
emit
(
"n := %s.neoDecode(data[%v ..."
)
// XXX error!
d
.
emit
(
"n, ok := %s.neoDecode(data)"
)
d
.
emit
(
"if !ok { goto overflow }"
)
d
.
emit
(
"data = data[n:]"
)
d
.
emit
(
"}"
)
d
.
emit
(
"}"
)
// insert overflow checkpoint after custom decoder so that overflow
// checks for following code are inserted after custom decoder call.
d
.
overflowCheck
()
}
}
// top-level driver for emitting size/encode/decode code for a type
// top-level driver for emitting size/encode/decode code for a type
...
@@ -1095,7 +1102,7 @@ func (e *decoder) genCustom(path string) {
...
@@ -1095,7 +1102,7 @@ func (e *decoder) genCustom(path string) {
// we can point to source location for where it happened)
// we can point to source location for where it happened)
func
codegenType
(
path
string
,
typ
types
.
Type
,
obj
types
.
Object
,
codegen
CodeGenerator
)
{
func
codegenType
(
path
string
,
typ
types
.
Type
,
obj
types
.
Object
,
codegen
CodeGenerator
)
{
if
types
.
Implements
(
typ
,
neoCustomXXX
)
{
if
types
.
Implements
(
typ
,
neoCustomXXX
)
{
codegen
.
genCustom
(
path
,
typ
)
codegen
.
genCustom
(
path
)
return
return
}
}
...
...
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