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trezor-firmware/tools/pb2py
2016-10-03 15:41:15 +02:00

166 lines
4.6 KiB
Python
Executable File

#!/usr/bin/env python
import sys
import os
from google.protobuf.internal.enum_type_wrapper import EnumTypeWrapper
def process_type(t, cls, msg_id, indexfile):
imports = ["import protobuf as p", "from micropython import const"]
out = ["t = p.MessageType('%s')" % t, ]
if msg_id is not None:
out.append("t.wire_type = const(%d)" % msg_id)
if indexfile is not None:
indexfile.write("%s = const(%d)\n" % (t, msg_id))
print(" * type %s" % t)
for v in sorted(cls.DESCRIPTOR.fields_by_name.values(), key=lambda x: x.number):
number = v.number
fieldname = v.name
type = None
repeated = v.label == 3
required = v.label == 2
# print v.has_default_value, v.default_value
if v.type in (4, 13, 14):
# TYPE_UINT64 = 4
# TYPE_UINT32 = 13
# TYPE_ENUM = 14
type = 'p.UVarintType'
elif v.type == 9:
# TYPE_STRING = 9
type = 'p.UnicodeType'
elif v.type == 8:
# TYPE_BOOL = 8
type = 'p.BoolType'
elif v.type == 12:
# TYPE_BYTES = 12
type = 'p.BytesType'
elif v.type == 11:
# TYPE_MESSAGE = 1
type = "p.EmbeddedMessage(%s)" % v.message_type.name
imports.append("from .%s import %s" %
(v.message_type.name, v.message_type.name))
else:
raise Exception("Unknown field type %s for field %s" % (v.type, k))
if repeated:
flags = ', flags=p.FLAG_REPEATED'
elif required:
flags = ', flags=p.FLAG_REQUIRED'
else:
flags = ''
if v.has_default_value:
default = ', default=%s' % repr(v.default_value)
else:
default = ''
out.append("t.add_field(%d, '%s', %s%s%s)" %
(number, fieldname, type, flags, default))
# print fieldname, number, type, repeated, default
# print v.__dict__
# print v.CPPTYPE_STRING
# print v.LABEL_REPEATED
# print v.enum_type
# v.has_default_value, v.default_value
# v.label == 3 # repeated
# print v.number
out.append("%s = t" % t)
return imports + out
def process_enum(t, cls):
out = []
print(" * enum %s" % t)
for k, v in cls.items():
# Remove type name from the beginning of the constant
# For example "PinMatrixRequestType_Current" -> "Current"
if k.startswith("%s_" % t):
k = k.replace("%s_" % t, '')
# If type ends with *Type, but constant use type name without *Type, remove it too :)
# For example "ButtonRequestType & ButtonRequest_Other" => "Other"
if t.endswith("Type") and k.startswith("%s_" % t.replace("Type", '')):
k = k.replace("%s_" % t.replace("Type", ''), '')
out.append("%s = const(%s)" % (k, v))
return out
def find_msg_type(msg_types, t):
for k, v in msg_types:
msg_name = k.replace('MessageType_', '')
if msg_name == t:
return v
def process_module(mod, genpath, indexfile):
print("Processing module %s" % mod.__name__)
types = dict([(name, cls)
for name, cls in mod.__dict__.items() if isinstance(cls, type)])
msg_types = __import__('pb2', globals(), locals(), [
'messages_pb2', ]).messages_pb2.MessageType.items()
for t, cls in types.items():
# Find message type for given class
msg_id = find_msg_type(msg_types, t)
out = process_type(t, cls, msg_id, indexfile)
write_to_file(genpath, t, out)
enums = dict([(name, cls) for name, cls in mod.__dict__.items()
if isinstance(cls, EnumTypeWrapper)])
for t, cls in enums.items():
out = process_enum(t, cls)
write_to_file(genpath, t, out)
def write_to_file(genpath, t, out):
# Write generated sourcecode to given file
f = open(os.path.join(genpath, "%s.py" % t), 'w')
out = ["# Automatically generated by pb2py"] + out
data = "\n".join(out)
f.write(data)
f.close()
if __name__ == '__main__':
if len(sys.argv) < 2:
print("Usage: ./pb2py modulename genpath indexfile")
sys.exit()
modulename = sys.argv[1]
genpath = sys.argv[2]
if len(sys.argv) > 2:
indexfile = open(sys.argv[3], 'a')
else:
indexfile = None
# Dynamically load module from argv[1]
tmp = __import__('pb2', globals(), locals(), ['%s_pb2' % modulename])
mod = getattr(tmp, "%s_pb2" % modulename)
process_module(mod, genpath, indexfile)