diff options
Diffstat (limited to 'generator/nanopb_generator.py')
| -rwxr-xr-x | generator/nanopb_generator.py | 274 |
1 files changed, 137 insertions, 137 deletions
diff --git a/generator/nanopb_generator.py b/generator/nanopb_generator.py index bc388958..2dad4ec1 100755 --- a/generator/nanopb_generator.py +++ b/generator/nanopb_generator.py @@ -86,7 +86,7 @@ class Names: if isinstance(parts, Names): parts = parts.parts self.parts = tuple(parts) - + def __str__(self): return '_'.join(self.parts) @@ -97,10 +97,10 @@ class Names: return Names(self.parts + other) 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] != '.': @@ -130,7 +130,7 @@ class EncodedSize: value = 0 self.value = value self.symbols = symbols - + def __add__(self, other): if isinstance(other, int): return EncodedSize(self.value + other, self.symbols) @@ -162,43 +162,43 @@ class EncodedSize: class Enum: def __init__(self, names, desc, enum_options): '''desc is EnumDescriptorProto''' - + self.options = enum_options self.names = names + desc.name - + if enum_options.long_names: - self.values = [(self.names + x.name, x.number) for x in desc.value] + 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.values = [(names + x.name, x.number) for x in desc.value] + self.value_longnames = [self.names + x.name for x in desc.value] self.packed = enum_options.packed_enum - + def has_negative(self): for n, v in self.values: if v < 0: return True return False - + def encoded_size(self): return max([varint_max_size(v) for n,v in self.values]) - + def __str__(self): result = 'typedef enum _%s {\n' % self.names result += ',\n'.join([" %s = %d" % x for x in self.values]) result += '\n}' - + if self.packed: result += ' pb_packed' - + result += ' %s;' % self.names - + if not self.options.long_names: # Define the long names always so that enum value references # from other files work properly. for i, x in enumerate(self.values): result += '\n#define %s %s' % (self.value_longnames[i], x[0]) - + return result class FieldMaxSize: @@ -232,17 +232,17 @@ class Field: self.array_decl = "" self.enc_size = None self.ctype = None - + # 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 - + # Check field rules, i.e. required/optional/repeated. can_be_static = True if desc.label == FieldD.LABEL_REQUIRED: @@ -257,26 +257,26 @@ class Field: self.array_decl = '[%d]' % self.max_count 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: @@ -285,7 +285,7 @@ class Field: self.allocation = 'CALLBACK' else: raise NotImplementedError(field_options.type) - + # Decide the C data type to use in the struct. if desc.type in datatypes: self.ctype, self.pbtype, self.enc_size, isa = datatypes[desc.type] @@ -321,16 +321,16 @@ class Field: self.enc_size = None # Needs to be filled in after the message type is available else: raise NotImplementedError(desc.type) - + def __lt__(self, other): return self.tag < other.tag - + def __str__(self): result = '' if self.allocation == 'POINTER': if self.rules == 'REPEATED': result += ' pb_size_t ' + self.name + '_count;\n' - + if self.pbtype == 'MESSAGE': # Use struct definition, so recursive submessages are possible result += ' struct _%s *%s;' % (self.ctype, self.name) @@ -348,7 +348,7 @@ class Field: result += ' pb_size_t ' + self.name + '_count;\n' result += ' %s %s%s;' % (self.ctype, self.name, self.array_decl) return result - + def types(self): '''Return definitions for any special types this field might need.''' if self.pbtype == 'BYTES' and self.allocation == 'STATIC': @@ -356,7 +356,7 @@ class Field: else: result = '' return result - + def get_dependencies(self): '''Get list of type names used by this field.''' if self.allocation == 'STATIC': @@ -403,7 +403,7 @@ class Field: inner_init = str(self.default) + 'll' else: inner_init = str(self.default) - + if inner_init_only: return inner_init @@ -438,7 +438,7 @@ class Field: ctype = self.ctype default = self.get_initializer(False, True) array_decl = '' - + if self.pbtype == 'STRING': if self.allocation != 'STATIC': return None # Not implemented @@ -446,17 +446,17 @@ class Field: elif self.pbtype == 'BYTES': if self.allocation != 'STATIC': return None # Not implemented - + if declaration_only: return 'extern const %s %s_default%s;' % (ctype, self.struct_name + self.name, array_decl) else: return 'const %s %s_default%s = %s;' % (ctype, self.struct_name + self.name, array_decl, default) - + def tags(self): '''Return the #define for the tag number of this field.''' identifier = '%s_%s_tag' % (self.struct_name, self.name) return '#define %-40s %d\n' % (identifier, self.tag) - + def pb_field_t(self, prev_field_name): '''Return the pb_field_t initializer to use in the constant array. prev_field_name is the name of the previous field or None. @@ -475,7 +475,7 @@ class Field: result += '%s, ' % self.struct_name result += '%s, ' % self.name result += '%s, ' % (prev_field_name or self.name) - + if self.pbtype == 'MESSAGE': result += '&%s_fields)' % self.submsgname elif self.default is None: @@ -486,9 +486,9 @@ class Field: result += '0)' # Default value for extensions is not implemented else: result += '&%s_default)' % (self.struct_name + self.name) - + return result - + def largest_field_value(self): '''Determine if this field needs 16bit or 32bit pb_field_t structure to compile properly. Returns numeric value or a C-expression for assert.''' @@ -509,10 +509,10 @@ class Field: '''Return the maximum size that this field can take when encoded, including the field tag. If the size cannot be determined, returns None.''' - + if self.allocation != 'STATIC': return None - + if self.pbtype == 'MESSAGE': encsize = None if str(self.submsgname) in dependencies: @@ -547,7 +547,7 @@ class Field: % (self.struct_name, self.name)) else: encsize = EncodedSize(self.enc_size) - + encsize += varint_max_size(self.tag << 3) # Tag + wire type if self.rules == 'REPEATED': @@ -555,7 +555,7 @@ class Field: # Therefore we have to reserve space for it, even though # we emit packed arrays ourselves. encsize *= self.max_count - + return encsize @@ -577,16 +577,16 @@ class ExtensionRange(Field): self.default = None self.max_size = 0 self.max_count = 0 - + def __str__(self): return ' pb_extension_t *extensions;' - + def types(self): return '' - + def tags(self): return '' - + def encoded_size(self, dependencies): # We exclude extensions from the count, because they cannot be known # until runtime. Other option would be to return None here, but this @@ -598,7 +598,7 @@ class ExtensionField(Field): self.fullname = struct_name + desc.name self.extendee_name = names_from_type_name(desc.extendee) Field.__init__(self, self.fullname + 'struct', desc, field_options) - + if self.rules != 'OPTIONAL': self.skip = True else: @@ -616,7 +616,7 @@ class ExtensionField(Field): msg = '/* Extension field %s was skipped because only "optional"\n' % self.fullname msg +=' type of extension fields is currently supported. */\n' return msg - + return ('extern const pb_extension_type_t %s; /* field type: %s */\n' % (self.fullname, str(self).strip())) @@ -758,13 +758,13 @@ class Message: self.oneofs[f.oneof_index].add_field(field) else: self.fields.append(field) - + if len(desc.extension_range) > 0: field_options = get_nanopb_suboptions(desc, message_options, self.name + 'extensions') range_start = min([r.start for r in desc.extension_range]) if field_options.type != nanopb_pb2.FT_IGNORE: self.fields.append(ExtensionRange(self.name, range_start, field_options)) - + self.packed = message_options.packed_struct self.ordered_fields = self.fields[:] self.ordered_fields.sort() @@ -775,7 +775,7 @@ class Message: for f in self.fields: deps += f.get_dependencies() return deps - + def __str__(self): result = 'typedef struct _%s {\n' % self.name @@ -786,30 +786,30 @@ class Message: result += '\n'.join([str(f) for f in self.ordered_fields]) result += '\n}' - + if self.packed: result += ' pb_packed' - + result += ' %s;' % self.name - + if self.packed: result = 'PB_PACKED_STRUCT_START\n' + result result += '\nPB_PACKED_STRUCT_END' - + return result - + def types(self): return ''.join([f.types() for f in self.fields]) def get_initializer(self, null_init): if not self.ordered_fields: return '{0}' - + parts = [] for field in self.ordered_fields: parts.append(field.get_initializer(null_init)) return '{' + ', '.join(parts) + '}' - + def default_decl(self, declaration_only = False): result = "" for field in self.fields: @@ -842,7 +842,7 @@ class Message: def fields_definition(self): result = 'const pb_field_t %s_fields[%d] = {\n' % (self.name, self.count_all_fields() + 1) - + prev = None for field in self.ordered_fields: result += field.pb_field_t(prev) @@ -851,7 +851,7 @@ class Message: prev = field.name + '.' + field.fields[-1].name else: prev = field.name - + result += ' PB_LAST_FIELD\n};' return result @@ -865,7 +865,7 @@ class Message: if fsize is None: return None size += fsize - + return size @@ -879,11 +879,11 @@ def iterate_messages(desc, names = Names()): submsgs = desc.message_type else: submsgs = desc.nested_type - + for submsg in submsgs: sub_names = names + submsg.name yield sub_names, submsg - + for x in iterate_messages(submsg, sub_names): yield x @@ -924,7 +924,7 @@ def sort_dependencies(messages): for message in messages: dependencies[str(message.name)] = set(message.get_dependencies()) message_by_name[str(message.name)] = message - + for msgname in toposort2(dependencies): if msgname in message_by_name: yield message_by_name[msgname] @@ -946,7 +946,7 @@ class ProtoFile: self.file_options = file_options self.dependencies = {} self.parse() - + # Some of types used in this file probably come from the file itself. # Thus it has implicit dependency on itself. self.add_dependency(self) @@ -955,39 +955,39 @@ class ProtoFile: self.enums = [] self.messages = [] self.extensions = [] - + if self.fdesc.package: base_name = Names(self.fdesc.package.split('.')) else: base_name = Names() - + for enum in self.fdesc.enum_type: enum_options = get_nanopb_suboptions(enum, self.file_options, base_name + enum.name) self.enums.append(Enum(base_name, enum, enum_options)) - + for names, message in iterate_messages(self.fdesc, base_name): message_options = get_nanopb_suboptions(message, self.file_options, names) - + if message_options.skip_message: continue - + self.messages.append(Message(names, message, message_options)) for enum in message.enum_type: enum_options = get_nanopb_suboptions(enum, message_options, names + enum.name) self.enums.append(Enum(names, enum, enum_options)) - + for names, extension in iterate_extensions(self.fdesc, base_name): field_options = get_nanopb_suboptions(extension, self.file_options, names + extension.name) if field_options.type != nanopb_pb2.FT_IGNORE: self.extensions.append(ExtensionField(names, extension, field_options)) - + def add_dependency(self, other): for enum in other.enums: self.dependencies[str(enum.names)] = enum - + for msg in other.messages: self.dependencies[str(msg.name)] = msg - + # Fix field default values where enum short names are used. for enum in other.enums: if not enum.options.long_names: @@ -996,7 +996,7 @@ class ProtoFile: if field.default in enum.value_longnames: idx = enum.value_longnames.index(field.default) field.default = enum.values[idx][0] - + # Fix field data types where enums have negative values. for enum in other.enums: if not enum.has_negative(): @@ -1009,13 +1009,13 @@ class ProtoFile: '''Generate content for a header file. Generates strings, which should be concatenated and stored to file. ''' - + yield '/* Automatically generated nanopb header */\n' if options.notimestamp: yield '/* Generated by %s */\n\n' % (nanopb_version) else: yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime()) - + symbol = make_identifier(headername) yield '#ifndef PB_%s_INCLUDED\n' % symbol yield '#define PB_%s_INCLUDED\n' % symbol @@ -1025,7 +1025,7 @@ class ProtoFile: # no %s specified - use whatever was passed in as options.libformat yield options.libformat yield '\n' - + for incfile in includes: noext = os.path.splitext(incfile)[0] yield options.genformat % (noext + options.extension + '.h') @@ -1039,30 +1039,30 @@ class ProtoFile: yield '#ifdef __cplusplus\n' yield 'extern "C" {\n' yield '#endif\n\n' - + if self.enums: yield '/* Enum definitions */\n' for enum in self.enums: yield str(enum) + '\n\n' - + if self.messages: yield '/* Struct definitions */\n' for msg in sort_dependencies(self.messages): yield msg.types() yield str(msg) + '\n\n' - + if self.extensions: yield '/* Extensions */\n' for extension in self.extensions: yield extension.extension_decl() yield '\n' - + if self.messages: yield '/* Default values for struct fields */\n' for msg in self.messages: yield msg.default_decl(True) yield '\n' - + yield '/* Initializer values for message structs */\n' for msg in self.messages: identifier = '%s_init_default' % msg.name @@ -1071,7 +1071,7 @@ class ProtoFile: identifier = '%s_init_zero' % msg.name yield '#define %-40s %s\n' % (identifier, msg.get_initializer(True)) yield '\n' - + yield '/* Field tags (for use in manual encoding/decoding) */\n' for msg in sort_dependencies(self.messages): for field in msg.fields: @@ -1079,12 +1079,12 @@ class ProtoFile: for extension in self.extensions: yield extension.tags() yield '\n' - + yield '/* Struct field encoding specification for nanopb */\n' for msg in self.messages: yield msg.fields_declaration() + '\n' yield '\n' - + yield '/* Maximum encoded size of messages (where known) */\n' for msg in self.messages: msize = msg.encoded_size(self.dependencies) @@ -1094,7 +1094,7 @@ class ProtoFile: yield '\n' yield '/* Message IDs (where set with "msgid" option) */\n' - + yield '#ifdef PB_MSGID\n' for msg in self.messages: if hasattr(msg,'msgid'): @@ -1123,13 +1123,13 @@ class ProtoFile: yield '#ifdef __cplusplus\n' yield '} /* extern "C" */\n' yield '#endif\n' - + # End of header yield '\n#endif\n' def generate_source(self, headername, options): '''Generate content for a source file.''' - + yield '/* Automatically generated nanopb constant definitions */\n' if options.notimestamp: yield '/* Generated by %s */\n\n' % (nanopb_version) @@ -1137,23 +1137,23 @@ class ProtoFile: yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime()) yield options.genformat % (headername) yield '\n' - + yield '#if PB_PROTO_HEADER_VERSION != 30\n' yield '#error Regenerate this file with the current version of nanopb generator.\n' yield '#endif\n' yield '\n' - + for msg in self.messages: yield msg.default_decl(False) - + yield '\n\n' - + for msg in self.messages: yield msg.fields_definition() + '\n\n' - + for ext in self.extensions: yield ext.extension_def() + '\n' - + # Add checks for numeric limits if self.messages: largest_msg = max(self.messages, key = lambda m: m.count_required_fields()) @@ -1178,7 +1178,7 @@ class ProtoFile: if worst > 255 or checks: yield '\n/* Check that field information fits in pb_field_t */\n' - + if worst > 65535 or checks: yield '#if !defined(PB_FIELD_32BIT)\n' if worst > 65535: @@ -1195,7 +1195,7 @@ class ProtoFile: yield ' */\n' yield 'PB_STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs) yield '#endif\n\n' - + if worst < 65536: yield '#if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)\n' if worst > 255: @@ -1212,14 +1212,14 @@ class ProtoFile: yield ' */\n' yield 'PB_STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs) yield '#endif\n\n' - + # Add check for sizeof(double) has_double = False for msg in self.messages: for field in msg.fields: if field.ctype == 'double': has_double = True - + if has_double: yield '\n' yield '/* On some platforms (such as AVR), double is really float.\n' @@ -1227,7 +1227,7 @@ class ProtoFile: yield ' * To get rid of this error, remove any double fields from your .proto.\n' yield ' */\n' yield 'PB_STATIC_ASSERT(sizeof(double) == 8, DOUBLE_MUST_BE_8_BYTES)\n' - + yield '\n' # --------------------------------------------------------------------------- @@ -1249,17 +1249,17 @@ def read_options_file(infile): line = line.strip() if not line: continue - + parts = line.split(None, 1) - + if len(parts) < 2: sys.stderr.write("%s:%d: " % (infile.name, i + 1) + "Option lines should have space between field name and options. " + "Skipping line: '%s'\n" % line) continue - + opts = nanopb_pb2.NanoPBOptions() - + try: text_format.Merge(parts[1], opts) except Exception as e: @@ -1281,14 +1281,14 @@ def get_nanopb_suboptions(subdesc, options, name): '''Get copy of options, and merge information from subdesc.''' new_options = nanopb_pb2.NanoPBOptions() new_options.CopyFrom(options) - + # Handle options defined in a separate file dotname = '.'.join(name.parts) for namemask, options in Globals.separate_options: if fnmatch(dotname, namemask): Globals.matched_namemasks.add(namemask) new_options.MergeFrom(options) - + # Handle options defined in .proto if isinstance(subdesc.options, descriptor.FieldOptions): ext_type = nanopb_pb2.nanopb @@ -1300,15 +1300,15 @@ def get_nanopb_suboptions(subdesc, options, name): 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) - + if Globals.verbose_options: sys.stderr.write("Options for " + dotname + ": ") sys.stderr.write(text_format.MessageToString(new_options) + "\n") - + return new_options @@ -1317,7 +1317,7 @@ def get_nanopb_suboptions(subdesc, options, name): # --------------------------------------------------------------------------- import sys -import os.path +import os.path from optparse import OptionParser optparser = OptionParser( @@ -1353,11 +1353,11 @@ def parse_file(filename, fdesc, options): toplevel_options = nanopb_pb2.NanoPBOptions() for s in options.settings: text_format.Merge(s, toplevel_options) - + if not fdesc: data = open(filename, 'rb').read() fdesc = descriptor.FileDescriptorSet.FromString(data).file[0] - + # Check if there is a separate .options file had_abspath = False try: @@ -1384,12 +1384,12 @@ def parse_file(filename, fdesc, options): Globals.separate_options = [] Globals.matched_namemasks = set() - + # Parse the file file_options = get_nanopb_suboptions(fdesc, toplevel_options, Names([filename])) f = ProtoFile(fdesc, file_options) f.optfilename = optfilename - + return f def process_file(filename, fdesc, options, other_files = {}): @@ -1397,7 +1397,7 @@ def process_file(filename, fdesc, options, other_files = {}): filename: The full path to the .proto or .pb source file, as string. fdesc: The loaded FileDescriptorSet, or None to read from the input file. options: Command line options as they come from OptionsParser. - + Returns a dict: {'headername': Name of header file, 'headerdata': Data for the .h header file, @@ -1417,12 +1417,12 @@ def process_file(filename, fdesc, options, other_files = {}): headername = noext + options.extension + '.h' sourcename = noext + options.extension + '.c' headerbasename = os.path.basename(headername) - + # 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'] + options.exclude includes = [d for d in f.fdesc.dependency if d not in excludes] - + headerdata = ''.join(f.generate_header(includes, headerbasename, options)) sourcedata = ''.join(f.generate_source(headerbasename, options)) @@ -1436,30 +1436,30 @@ def process_file(filename, fdesc, options, other_files = {}): return {'headername': headername, 'headerdata': headerdata, 'sourcename': sourcename, 'sourcedata': sourcedata} - + def main_cli(): '''Main function when invoked directly from the command line.''' - + options, filenames = optparser.parse_args() - + if not filenames: optparser.print_help() sys.exit(1) - + if options.quiet: options.verbose = False Globals.verbose_options = options.verbose - + for filename in filenames: results = process_file(filename, None, options) - + if not options.quiet: sys.stderr.write("Writing to " + results['headername'] + " and " + results['sourcename'] + "\n") - + open(results['headername'], 'w').write(results['headerdata']) - open(results['sourcename'], 'w').write(results['sourcedata']) + open(results['sourcename'], 'w').write(results['sourcedata']) def main_plugin(): '''Main function when invoked as a protoc plugin.''' @@ -1470,51 +1470,51 @@ def main_plugin(): # Set stdin and stdout to binary mode msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY) msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) - + data = io.open(sys.stdin.fileno(), "rb").read() request = plugin_pb2.CodeGeneratorRequest.FromString(data) - + try: # Versions of Python prior to 2.7.3 do not support unicode # input to shlex.split(). Try to convert to str if possible. params = str(request.parameter) except UnicodeEncodeError: params = request.parameter - + import shlex args = shlex.split(params) options, dummy = optparser.parse_args(args) - + Globals.verbose_options = options.verbose - + response = plugin_pb2.CodeGeneratorResponse() - + # Google's protoc does not currently indicate the full path of proto files. # Instead always add the main file path to the search dirs, that works for # the common case. import os.path options.options_path.append(os.path.dirname(request.file_to_generate[0])) - + # Process any include files first, in order to have them # available as dependencies other_files = {} for fdesc in request.proto_file: other_files[fdesc.name] = parse_file(fdesc.name, fdesc, options) - + for filename in request.file_to_generate: for fdesc in request.proto_file: if fdesc.name == filename: results = process_file(filename, fdesc, options, other_files) - + f = response.file.add() f.name = results['headername'] f.content = results['headerdata'] f = response.file.add() f.name = results['sourcename'] - f.content = results['sourcedata'] - + f.content = results['sourcedata'] + io.open(sys.stdout.fileno(), "wb").write(response.SerializeToString()) if __name__ == '__main__': |