Skip to content
GitLab
Menu
Projects
Groups
Snippets
Help
Help
Support
Community forum
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
Menu
Open sidebar
Sven Gestegård Robertz
LabComm
Commits
986a3cbe
Commit
986a3cbe
authored
Feb 21, 2013
by
Sven Robertz
Browse files
probably implemented packed32 in python
parent
ceb0da14
Changes
1
Hide whitespace changes
Inline
Side-by-side
lib/python/labcomm/LabComm.py
View file @
986a3cbe
...
...
@@ -89,6 +89,12 @@
#?? +----+----+----+----+
#
#
# type numbers and lengths do not have a fixed lenght, but are packed into sequences
# of 7 bit chunks, represented in bytes with the high bit meaning that more data
# is to come.
#
# The chunks are sent "little endian": each 7 bit chunk is more significant than
# the previous. See encode_packed32 and decode_packed32 in in Codec classes below.
import
struct
as
packer
...
...
@@ -306,9 +312,9 @@ class array(object):
def
encode_decl
(
self
,
encoder
):
encoder
.
encode_type
(
i_ARRAY
)
encoder
.
encode_
int
(
len
(
self
.
indices
))
encoder
.
encode_
packed32
(
len
(
self
.
indices
))
for
i
in
self
.
indices
:
encoder
.
encode_
int
(
i
)
encoder
.
encode_
packed32
(
i
)
encoder
.
encode_type_number
(
self
.
decl
)
def
min_max_shape
(
self
,
l
,
depth
=
0
,
shape
=
[]):
...
...
@@ -344,7 +350,7 @@ class array(object):
(
shape
,
self
.
indices
))
for
i
in
range
(
len
(
self
.
indices
)):
if
self
.
indices
[
i
]
==
0
:
encoder
.
encode_
int
(
shape
[
i
])
encoder
.
encode_
packed32
(
shape
[
i
])
elif
self
.
indices
[
i
]
!=
shape
[
i
]:
raise
Exception
(
"Actual dimension %d in %s differs from %s"
%
(
i
,
shape
,
self
.
indices
))
...
...
@@ -362,10 +368,10 @@ class array(object):
self
.
encode_value
(
encoder
,
value
,
depth
)
def
decode_decl
(
self
,
decoder
):
n_indices
=
decoder
.
decode_
int
()
n_indices
=
decoder
.
decode_
packed32
()
indices
=
[]
for
i
in
range
(
n_indices
):
index
=
decoder
.
decode_
int
()
index
=
decoder
.
decode_
packed32
()
indices
.
append
(
index
)
elem_decl
=
decoder
.
decode_decl
()
return
array
(
indices
,
elem_decl
)
...
...
@@ -383,7 +389,7 @@ class array(object):
indices
=
[]
for
i
in
self
.
indices
:
if
i
==
0
:
i
=
decoder
.
decode_
int
()
i
=
decoder
.
decode_
packed32
()
indices
.
append
(
i
)
return
self
.
decode_value
(
decoder
,
indices
)
...
...
@@ -400,7 +406,7 @@ class array(object):
indices
=
[]
for
i
in
self
.
indices
:
if
i
==
0
:
i
=
decoder
.
decode_
int
()
i
=
decoder
.
decode_
packed32
()
indices
.
append
(
i
)
return
self
.
new_instance_value
(
indices
)
...
...
@@ -414,7 +420,7 @@ class struct:
def
encode_decl
(
self
,
encoder
):
encoder
.
encode_type
(
i_STRUCT
)
encoder
.
encode_
int
(
len
(
self
.
field
))
encoder
.
encode_
packed32
(
len
(
self
.
field
))
for
(
name
,
decl
)
in
self
.
field
:
encoder
.
encode_string
(
name
)
encoder
.
encode_type_number
(
decl
)
...
...
@@ -429,7 +435,7 @@ class struct:
decl
.
encode
(
encoder
,
obj
.
__getattribute__
(
name
))
def
decode_decl
(
self
,
decoder
):
n_field
=
decoder
.
decode_
int
()
n_field
=
decoder
.
decode_
packed32
()
field
=
[]
for
i
in
range
(
n_field
):
name
=
decoder
.
decode_string
()
...
...
@@ -540,7 +546,7 @@ class Codec(object):
index
.
sort
()
for
i
in
index
:
e
=
self
.
index_to_decl
[
i
]
if
i
>=
0x80
and
isinstance
(
e
,
sample
):
if
i
>=
i_USER
and
isinstance
(
e
,
sample
):
result
.
append
(
e
)
return
result
...
...
@@ -573,6 +579,14 @@ class Encoder(Codec):
except
KeyError
:
decl
.
encode_decl
(
self
)
def
encode_packed32
(
self
,
v
):
tmp
=
v
&
0xffffffff
;
while
(
tmp
>=
0x80
):
self
.
encode_byte
(
(
tmp
&
0x7f
)
|
0x80
)
tmp
>>=
7
self
.
encode_byte
(
tmp
&
0x7f
)
def
encode_type
(
self
,
index
):
self
.
pack
(
"!i"
,
index
)
...
...
@@ -648,8 +662,18 @@ class Decoder(Codec):
return
result
def
decode_packed32
(
self
):
res
=
0
i
=
0
cont
=
True
while
(
cont
):
c
=
self
.
decode_byte
()
res
|=
(
c
&
0x7f
)
<<
7
*
i
cont
=
(
c
&
0x80
)
!=
0
;
return
res
def
decode_type_number
(
self
):
return
self
.
unpack
(
"!i"
)
return
self
.
decode_packed32
(
)
def
decode_boolean
(
self
):
return
self
.
unpack
(
"!b"
)
!=
0
...
...
@@ -673,7 +697,7 @@ class Decoder(Codec):
return
self
.
unpack
(
"!d"
)
def
decode_string
(
self
):
length
=
self
.
unpack
(
"!i"
)
length
=
self
.
decode_packed32
(
)
return
self
.
unpack
(
"!%ds"
%
length
).
decode
(
"utf8"
)
...
...
Write
Preview
Supports
Markdown
0%
Try again
or
attach a new file
.
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment