'''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.'''
+nanopb_version = "nanopb-0.1.7-dev"
try:
import google.protobuf.descriptor_pb2 as descriptor
# Generation of single fields
# ---------------------------------------------------------------------------
-
+import time
import os.path
# Values are tuple (c type, pb ltype)
return Names(type_name[1:].split('.'))
class Enum:
- def __init__(self, names, desc):
+ def __init__(self, names, desc, enum_options):
'''desc is EnumDescriptorProto'''
- self.names = names + desc.name
+
+ if enum_options.long_names:
+ self.names = names + desc.name
+ else:
+ self.names = names
+
self.values = [(self.names + x.name, x.number) for x in desc.value]
def __str__(self):
return result
class Field:
- def __init__(self, struct_name, desc):
+ def __init__(self, struct_name, desc, field_options):
'''desc is FieldDescriptorProto'''
self.tag = desc.number
self.struct_name = struct_name
self.max_count = None
self.array_decl = ""
- # Parse nanopb-specific field options
- if desc.options.HasExtension(nanopb_pb2.nanopb):
- ext = desc.options.Extensions[nanopb_pb2.nanopb]
- if ext.HasField("max_size"):
- self.max_size = ext.max_size
- if ext.HasField("max_count"):
- self.max_count = ext.max_count
+ # Parse field options
+ if field_options.HasField("max_size"):
+ self.max_size = field_options.max_size
+
+ if field_options.HasField("max_count"):
+ self.max_count = field_options.max_count
if desc.HasField('default_value'):
self.default = desc.default_value
-
+
# Decide HTYPE
# HTYPE is the high-order nibble of nanopb field description,
# defining whether value is required/optional/repeated.
- is_callback = False
+ can_be_static = True
if desc.label == FieldD.LABEL_REQUIRED:
self.htype = 'PB_HTYPE_REQUIRED'
elif desc.label == FieldD.LABEL_OPTIONAL:
self.htype = 'PB_HTYPE_OPTIONAL'
elif desc.label == FieldD.LABEL_REPEATED:
if self.max_count is None:
- is_callback = True
+ can_be_static = False
else:
self.htype = 'PB_HTYPE_ARRAY'
self.array_decl = '[%d]' % self.max_count
elif desc.type == FieldD.TYPE_STRING:
self.ltype = 'PB_LTYPE_STRING'
if self.max_size is None:
- is_callback = True
+ can_be_static = False
else:
self.ctype = 'char'
self.array_decl += '[%d]' % self.max_size
elif desc.type == FieldD.TYPE_BYTES:
self.ltype = 'PB_LTYPE_BYTES'
if self.max_size is None:
- is_callback = True
+ can_be_static = False
else:
self.ctype = self.struct_name + self.name + 't'
elif desc.type == FieldD.TYPE_MESSAGE:
else:
raise NotImplementedError(desc.type)
- if is_callback:
+ if field_options.type == nanopb_pb2.FT_DEFAULT:
+ if can_be_static:
+ field_options.type = nanopb_pb2.FT_STATIC
+ else:
+ field_options.type = nanopb_pb2.FT_CALLBACK
+
+ if field_options.type == nanopb_pb2.FT_STATIC and not can_be_static:
+ raise Exception("Field %s is defined as static, but max_size or max_count is not given." % self.name)
+
+ if field_options.type == nanopb_pb2.FT_CALLBACK:
self.htype = 'PB_HTYPE_CALLBACK'
self.ctype = 'pb_callback_t'
self.array_decl = ''
class Message:
- def __init__(self, names, desc):
+ def __init__(self, names, desc, message_options):
self.name = names
- self.fields = [Field(self.name, f) for f in desc.field]
+ self.fields = [Field(self.name, f, get_nanopb_suboptions(f, message_options)) for f in desc.field]
self.ordered_fields = self.fields[:]
self.ordered_fields.sort()
for x in iterate_messages(submsg, sub_names):
yield x
-def parse_file(fdesc):
+def parse_file(fdesc, file_options):
'''Takes a FileDescriptorProto and returns tuple (enum, messages).'''
enums = []
base_name = Names()
for enum in fdesc.enum_type:
- enums.append(Enum(base_name, enum))
+ enum_options = get_nanopb_suboptions(enum, file_options)
+ enums.append(Enum(base_name, enum, enum_options))
for names, message in iterate_messages(fdesc, base_name):
- messages.append(Message(names, message))
+ message_options = get_nanopb_suboptions(message, file_options)
+ messages.append(Message(names, message, message_options))
for enum in message.enum_type:
- enums.append(Enum(names, enum))
+ enums.append(Enum(names, enum, message_options))
return enums, messages
'''
yield '/* Automatically generated nanopb header */\n'
+ yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime())
symbol = headername.replace('.', '_').upper()
yield '#ifndef _PB_%s_\n' % symbol
for dependency in dependencies:
noext = os.path.splitext(dependency)[0]
yield '#include "%s.pb.h"\n' % noext
- yield '\n'
+
+ yield '#ifdef __cplusplus\n'
+ yield 'extern "C" {\n'
+ yield '#endif\n\n'
yield '/* Enum definitions */\n'
for enum in enums:
yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_32BIT)\n' % assertion
yield '#endif\n'
+ yield '\n#ifdef __cplusplus\n'
+ yield '} /* extern "C" */\n'
+ yield '#endif\n'
+
# End of header
yield '\n#endif\n'
'''Generate content for a source file.'''
yield '/* Automatically generated nanopb constant definitions */\n'
+ yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime())
yield '#include "%s"\n\n' % headername
for msg in messages:
import sys
import os.path
from optparse import OptionParser
+import google.protobuf.text_format as text_format
optparser = OptionParser(
usage = "Usage: nanopb_generator.py [options] file.pb ...",
help="Exclude file from generated #include list.")
optparser.add_option("-q", "--quiet", dest="quiet", action="store_true", default=False,
help="Don't print anything except errors.")
+optparser.add_option("-v", "--verbose", dest="verbose", action="store_true", default=False,
+ help="Print more information.")
+optparser.add_option("-s", dest="settings", metavar="OPTION:VALUE", action="append", default=[],
+ help="Set generator option (max_size, max_count etc.).")
+
+def get_nanopb_suboptions(subdesc, options):
+ '''Get copy of options, and merge information from subdesc.'''
+ new_options = nanopb_pb2.NanoPBOptions()
+ new_options.CopyFrom(options)
+
+ if isinstance(subdesc.options, descriptor.FieldOptions):
+ ext_type = nanopb_pb2.nanopb
+ elif isinstance(subdesc.options, descriptor.FileOptions):
+ ext_type = nanopb_pb2.nanopb_fileopt
+ elif isinstance(subdesc.options, descriptor.MessageOptions):
+ ext_type = nanopb_pb2.nanopb_msgopt
+ elif isinstance(subdesc.options, descriptor.EnumOptions):
+ ext_type = nanopb_pb2.nanopb_enumopt
+ else:
+ raise Exception("Unknown options type")
+
+ if subdesc.options.HasExtension(ext_type):
+ ext = subdesc.options.Extensions[ext_type]
+ new_options.MergeFrom(ext)
+
+ return new_options
def process(filenames, options):
'''Process the files given on the command line.'''
optparser.print_help()
return False
+ if options.quiet:
+ options.verbose = False
+
+ toplevel_options = nanopb_pb2.NanoPBOptions()
+ for s in options.settings:
+ text_format.Merge(s, toplevel_options)
+
for filename in filenames:
data = open(filename, 'rb').read()
fdesc = descriptor.FileDescriptorSet.FromString(data)
- enums, messages = parse_file(fdesc.file[0])
+
+ file_options = get_nanopb_suboptions(fdesc.file[0], toplevel_options)
+
+ if options.verbose:
+ print "Options for " + filename + ":"
+ print text_format.MessageToString(file_options)
+
+ enums, messages = parse_file(fdesc.file[0], file_options)
noext = os.path.splitext(filename)[0]
headername = noext + '.pb.h'
# List of .proto files that should not be included in the C header file
# even if they are mentioned in the source .proto.
- excludes = ['nanopb.proto', 'google/protobuf/descriptor.proto']
+ excludes = ['nanopb.proto', 'google/protobuf/descriptor.proto'] + options.exclude
dependencies = [d for d in fdesc.file[0].dependency if d not in excludes]
header = open(headername, 'w')
Code Review / apps / agl-service-can-low-level.git / blobdiff