'''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.'''
nanopb_version = "nanopb-0.2.5-dev"
+import sys
+
+try:
+ # Add some dummy imports to keep packaging tools happy.
+ import google, distutils.util # bbfreeze seems to need these
+ import pkg_resources # pyinstaller / protobuf 2.5 seem to need these
+except:
+ # Don't care, we will error out later if it is actually important.
+ pass
+
try:
- import google.protobuf.descriptor_pb2 as descriptor
import google.protobuf.text_format as text_format
except:
- print
- print "*************************************************************"
- print "*** Could not import the Google protobuf Python libraries ***"
- print "*** Try installing package 'python-protobuf' or similar. ***"
- print "*************************************************************"
- print
+ sys.stderr.write('''
+ *************************************************************
+ *** Could not import the Google protobuf Python libraries ***
+ *** Try installing package 'python-protobuf' or similar. ***
+ *************************************************************
+ ''' + '\n')
raise
try:
- import nanopb_pb2
+ import proto.nanopb_pb2 as nanopb_pb2
+ import proto.descriptor_pb2 as descriptor
except:
- print
- print "***************************************************************"
- print "*** Could not import the precompiled nanopb_pb2.py. ***"
- print "*** Run 'make' in the 'generator' folder to update the file.***"
- print "***************************************************************"
- print
+ sys.stderr.write('''
+ ********************************************************************
+ *** Failed to import the protocol definitions for generator. ***
+ *** You have to run 'make' in the nanopb/generator/proto folder. ***
+ ********************************************************************
+ ''' + '\n')
raise
-
-
-
-
# ---------------------------------------------------------------------------
# Generation of single fields
# ---------------------------------------------------------------------------
else:
raise NotImplementedError(desc.label)
+ # Check if the field can be implemented with static allocation
+ # i.e. whether the data size is known.
+ if desc.type == FieldD.TYPE_STRING and self.max_size is None:
+ can_be_static = False
+
+ if desc.type == FieldD.TYPE_BYTES and self.max_size is None:
+ can_be_static = False
+
+ # Decide how the field data will be allocated
+ 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_STATIC:
+ self.allocation = 'STATIC'
+ elif field_options.type == nanopb_pb2.FT_POINTER:
+ self.allocation = 'POINTER'
+ elif field_options.type == nanopb_pb2.FT_CALLBACK:
+ self.allocation = 'CALLBACK'
+ else:
+ raise NotImplementedError(field_options.type)
+
# Decide the C data type to use in the struct.
if datatypes.has_key(desc.type):
self.ctype, self.pbtype, self.enc_size = datatypes[desc.type]
self.enc_size = 5 # protoc rejects enum values > 32 bits
elif desc.type == FieldD.TYPE_STRING:
self.pbtype = 'STRING'
- if field_options.type == nanopb_pb2.FT_POINTER:
+ self.ctype = 'char'
+ if self.allocation == 'STATIC':
self.ctype = 'char'
- self.enc_size = None
- else:
- if self.max_size is None:
- can_be_static = False
- else:
- self.ctype = 'char'
- self.array_decl += '[%d]' % self.max_size
- self.enc_size = varint_max_size(self.max_size) + self.max_size
+ self.array_decl += '[%d]' % self.max_size
+ self.enc_size = varint_max_size(self.max_size) + self.max_size
elif desc.type == FieldD.TYPE_BYTES:
self.pbtype = 'BYTES'
- if field_options.type == nanopb_pb2.FT_POINTER:
+ if self.allocation == 'STATIC':
self.ctype = self.struct_name + self.name + 't'
- self.enc_size = None
- else:
- if self.max_size is None:
- can_be_static = False
- else:
- self.ctype = self.struct_name + self.name + 't'
- self.enc_size = varint_max_size(self.max_size) + self.max_size
+ self.enc_size = varint_max_size(self.max_size) + self.max_size
+ elif self.allocation == 'POINTER':
+ self.ctype = 'pb_bytes_ptr_t'
elif desc.type == FieldD.TYPE_MESSAGE:
self.pbtype = 'MESSAGE'
self.ctype = self.submsgname = names_from_type_name(desc.type_name)
else:
raise NotImplementedError(desc.type)
- 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_STATIC:
- self.allocation = 'STATIC'
- elif field_options.type == nanopb_pb2.FT_POINTER:
- self.allocation = 'POINTER'
- elif field_options.type == nanopb_pb2.FT_CALLBACK:
- self.allocation = 'CALLBACK'
- self.ctype = 'pb_callback_t'
- self.array_decl = ''
- else:
- raise NotImplementedError(field_options.type)
-
def __cmp__(self, other):
return cmp(self.tag, other.tag)
if self.rules == 'REPEATED':
result += ' size_t ' + self.name + '_count;\n'
- # Use struct definition, so recursive submessages are possible
if self.pbtype == 'MESSAGE':
+ # Use struct definition, so recursive submessages are possible
result += ' struct _%s *%s;' % (self.ctype, self.name)
-
- # String arrays need to be defined as pointers to pointers
elif self.rules == 'REPEATED' and self.pbtype == 'STRING':
+ # String arrays need to be defined as pointers to pointers
result += ' %s **%s;' % (self.ctype, self.name)
else:
result += ' %s *%s;' % (self.ctype, self.name)
+ elif self.allocation == 'CALLBACK':
+ result += ' pb_callback_t %s;' % self.name
else:
if self.rules == 'OPTIONAL' and self.allocation == 'STATIC':
result += ' bool has_' + self.name + ';\n'
def types(self):
'''Return definitions for any special types this field might need.'''
- if self.pbtype == 'BYTES' and (self.allocation == 'STATIC' or self.allocation == 'POINTER'):
+ if self.pbtype == 'BYTES' and self.allocation == 'STATIC':
result = 'typedef struct {\n'
result += ' size_t size;\n'
- if self.allocation == 'POINTER':
- result += ' uint8_t *bytes;\n'
- else:
- result += ' uint8_t bytes[%d];\n' % self.max_size
+ result += ' uint8_t bytes[%d];\n' % self.max_size
result += '} %s;\n' % self.ctype
else:
result = None
def main_plugin():
'''Main function when invoked as a protoc plugin.'''
- import plugin_pb2
+ import sys
+ if sys.platform == "win32":
+ import os, msvcrt
+ # Set stdin and stdout to binary mode
+ msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
+ msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
+
+ import proto.plugin_pb2 as plugin_pb2
data = sys.stdin.read()
request = plugin_pb2.CodeGeneratorRequest.FromString(data)
if __name__ == '__main__':
# Check if we are running as a plugin under protoc
- if 'protoc-gen-' in sys.argv[0]:
+ if 'protoc-gen-' in sys.argv[0] or '--protoc-plugin' in sys.argv:
main_plugin()
else:
main_cli()