'''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.'''
+nanopb_version = "nanopb-0.1.9-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)
else:
raise ValueError("Name parts should be of type str")
+ def __eq__(self, other):
+ return isinstance(other, Names) and self.parts == other.parts
+
def names_from_type_name(type_name):
'''Parse Names() from FieldDescriptorProto type_name'''
if type_name[0] != '.':
class Enum:
def __init__(self, names, desc, enum_options):
'''desc is EnumDescriptorProto'''
+
+ self.options = enum_options
self.names = names + desc.name
- self.values = [(self.names + x.name, x.number) for x in desc.value]
+
+ if enum_options.long_names:
+ self.values = [(self.names + x.name, x.number) for x in desc.value]
+ else:
+ self.values = [(names + x.name, x.number) for x in desc.value]
+
+ self.value_longnames = [self.names + x.name for x in desc.value]
def __str__(self):
result = 'typedef enum _%s {\n' % self.names
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 = ''
base_name = Names()
for enum in fdesc.enum_type:
- enums.append(Enum(base_name, enum, file_options))
+ 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):
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, message_options))
+ enum_options = get_nanopb_suboptions(enum, message_options)
+ enums.append(Enum(names, enum, enum_options))
+
+ # Fix field default values where enum short names are used.
+ for enum in enums:
+ if not enum.options.long_names:
+ for message in messages:
+ for field in message.fields:
+ if field.default in enum.value_longnames:
+ idx = enum.value_longnames.index(field.default)
+ field.default = enum.values[idx][0]
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:
worst = 0
worst_field = ''
checks = []
+ checks_msgnames = []
for msg in messages:
+ checks_msgnames.append(msg.name)
for field in msg.fields:
status = field.largest_field_value()
if isinstance(status, (str, unicode)):
yield '#error Field descriptor for %s is too large. Define PB_FIELD_16BIT to fix this.\n' % worst_field
else:
assertion = ' && '.join(str(c) + ' < 256' for c in checks)
- yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_16BIT)\n' % assertion
+ msgs = '_'.join(str(n) for n in checks_msgnames)
+ yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs)
yield '#endif\n\n'
if worst > 65535 or checks:
yield '#error Field descriptor for %s is too large. Define PB_FIELD_32BIT to fix this.\n' % worst_field
else:
assertion = ' && '.join(str(c) + ' < 65536' for c in checks)
- yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_32BIT)\n' % assertion
+ msgs = '_'.join(str(n) for n in checks_msgnames)
+ yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs)
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:
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")