From 13d97334c66d9f1ff2469d99a06b1da964a0511a Mon Sep 17 00:00:00 2001
From: Sven Gestegard Robertz <sven.robertz@cs.lth.se>
Date: Sat, 15 Feb 2014 16:47:16 +0100
Subject: [PATCH] experimental python implementation of coexistence of 2006 and
2013
---
examples/simple/run.sh | 5 +-
examples/wiki_example/example_decoder.py | 5 +-
examples/wiki_example/run | 2 +-
lib/python/labcomm/LabComm.py | 59 ++++++++++++++++--------
lib/python/labcomm/StreamReader.py | 13 ++++--
lib/python/labcomm/StreamWriter.py | 9 +++-
6 files changed, 64 insertions(+), 29 deletions(-)
diff --git a/examples/simple/run.sh b/examples/simple/run.sh
index 24521ab..fc3239c 100644
--- a/examples/simple/run.sh
+++ b/examples/simple/run.sh
@@ -11,7 +11,7 @@ java -cp .:../../lib/java:gen Encoder encoded_data
java -cp .:../../lib/java:gen Decoder encoded_data
echo "running python decoder (from wiki_example):"
-PYTHONPATH=../../lib/python ../wiki_example/example_decoder.py encoded_data
+PYTHONPATH=../../lib/python ../wiki_example/example_decoder.py encoded_data LabComm2013
echo
echo "*******************************************************"
@@ -23,3 +23,6 @@ java -cp .:../../lib/java:gen06 Encoder06 encoded_data06
./example_decoder06 encoded_data06
./example_encoder06 encoded_data06
java -cp .:../../lib/java:gen06 Decoder06 encoded_data06
+
+echo "running python decoder (from wiki_example):"
+PYTHONPATH=../../lib/python ../wiki_example/example_decoder.py encoded_data06 LabComm2006
diff --git a/examples/wiki_example/example_decoder.py b/examples/wiki_example/example_decoder.py
index d729145..8a0ba7b 100755
--- a/examples/wiki_example/example_decoder.py
+++ b/examples/wiki_example/example_decoder.py
@@ -4,12 +4,13 @@ import labcomm
import sys
if __name__ == "__main__":
- d = labcomm.Decoder(labcomm.StreamReader(open(sys.argv[1])))
+ d = labcomm.Decoder(labcomm.StreamReader(open(sys.argv[1])), sys.argv[2])
while True:
try:
data,decl = d.decode()
if data:
print data
- except:
+ except Exception, e:
+ print e
break
diff --git a/examples/wiki_example/run b/examples/wiki_example/run
index 9033181..62c288e 100755
--- a/examples/wiki_example/run
+++ b/examples/wiki_example/run
@@ -21,4 +21,4 @@ javac -cp ../../lib/java:. *.java
# Run through all executables (c->java->Python)
./example_encoder one two
java -cp ../../lib/java:. example_decoder_encoder example.encoded example.javaencoded
-PYTHONPATH=../../lib/python ./example_decoder.py example.javaencoded
+PYTHONPATH=../../lib/python ./example_decoder.py example.javaencoded LabComm2013
diff --git a/lib/python/labcomm/LabComm.py b/lib/python/labcomm/LabComm.py
index 6fa3ca8..4be9f8b 100644
--- a/lib/python/labcomm/LabComm.py
+++ b/lib/python/labcomm/LabComm.py
@@ -96,7 +96,14 @@
import types
import struct as packer
-VERSION = "LabComm2013"
+#VERSION = "LabComm2013"
+
+# Version testing
+def sendVersionString(version):
+ return version == "LabComm2013"
+
+def usePacked32(version):
+ return version == "LabComm2013"
i_TYPEDEF = 0x01
i_SAMPLE = 0x02
@@ -546,10 +553,11 @@ class Codec(object):
class Encoder(Codec):
- def __init__(self, writer):
+ def __init__(self, writer, version):
super(Encoder, self).__init__()
self.writer = writer
- self.writer.start(self, VERSION)
+ self.versoin = version
+ self.writer.start(self, self.version)
def pack(self, format, *args):
self.writer.write(packer.pack(format, *args))
@@ -575,14 +583,21 @@ class Encoder(Codec):
decl.encode_decl(self)
def encode_packed32(self, v):
- v = v & 0xffffffff
- tmp = [ v & 0x7f ]
- v = v >> 7
- while v:
- tmp.append(v & 0x7f | 0x80)
+ #if usePacked32(self.version) :
+ if self.version == "LabComm2013" :
+ v = v & 0xffffffff
+ tmp = [ v & 0x7f ]
v = v >> 7
- for c in reversed(tmp):
- self.encode_byte(c)
+ while v:
+ tmp.append(v & 0x7f | 0x80)
+ v = v >> 7
+ for c in reversed(tmp):
+ self.encode_byte(c)
+ elif self.version == "LabComm2006" :
+ v = v & 0xffffffff
+ self.encode_int(v)
+ else :
+ raise Exception("Unsupported labcomm version %s" % self.version)
def encode_type(self, index):
self.encode_packed32(index)
@@ -619,10 +634,11 @@ class Encoder(Codec):
# self.pack("!i%ds" % len(s), len(s), s)
class Decoder(Codec):
- def __init__(self, reader):
+ def __init__(self, reader, version):
super(Decoder, self).__init__()
self.reader = reader
- self.reader.start(self, VERSION)
+ self.version = version
+ self.reader.start(self, version)
def unpack(self, format):
size = packer.calcsize(format)
@@ -664,13 +680,18 @@ class Decoder(Codec):
return result
def decode_packed32(self):
- result = 0
- while True:
- tmp = self.decode_byte()
- result = (result << 7) | (tmp & 0x7f)
- if (tmp & 0x80) == 0:
- break
- return result
+ if self.version == "LabComm2013" :
+ result = 0
+ while True:
+ tmp = self.decode_byte()
+ result = (result << 7) | (tmp & 0x7f)
+ if (tmp & 0x80) == 0:
+ break
+ return result
+ elif self.version == "LabComm2006" :
+ return self.decode_int()
+ else :
+ raise Exception("Unsupported labcomm version %s" % self.version)
def decode_type_number(self):
return self.decode_packed32()
diff --git a/lib/python/labcomm/StreamReader.py b/lib/python/labcomm/StreamReader.py
index 08c97ab..b20983a 100644
--- a/lib/python/labcomm/StreamReader.py
+++ b/lib/python/labcomm/StreamReader.py
@@ -1,3 +1,5 @@
+import labcomm
+
class StreamReader:
def __init__(self, stream):
@@ -5,10 +7,13 @@ class StreamReader:
pass
def start(self, decoder, version):
- other_version = decoder.decode_string()
- if version != other_version:
- raise Exception("LabComm version mismatch %s != %s" %
- (version, other_version))
+ self.version = version;
+ if labcomm.LabComm.sendVersionString(version):
+ other_version = decoder.decode_string()
+ if version != other_version:
+ raise Exception("LabComm version mismatch %s != %s" %
+ (version, other_version))
+ pass
pass
def read(self, count):
diff --git a/lib/python/labcomm/StreamWriter.py b/lib/python/labcomm/StreamWriter.py
index ae57c96..759f56e 100644
--- a/lib/python/labcomm/StreamWriter.py
+++ b/lib/python/labcomm/StreamWriter.py
@@ -1,3 +1,5 @@
+import labcomm
+
class StreamWriter:
def __init__(self, stream):
@@ -5,8 +7,11 @@ class StreamWriter:
pass
def start(self, encoder, version):
- encoder.encode_string(version)
- pass
+ self.version = version;
+
+ if labcomm.LabComm.sendVersionString(version):
+ encoder.encode_string(version)
+ pass
def write(self, data):
self.stream.write(data)
--
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