X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=generator%2Fnanopb_generator.py;h=8c87ff538a030ed74de2628341fecd98304b1b1f;hb=acd72917912aa99e9751766ec90e2d2156639a60;hp=663745a151ea1e03c824a17705477a409c3c1e20;hpb=5522e02133be7d9dfd2f350f2774dfc0abc15686;p=apps%2Fagl-service-can-low-level.git diff --git a/generator/nanopb_generator.py b/generator/nanopb_generator.py old mode 100644 new mode 100755 index 663745a1..8c87ff53 --- a/generator/nanopb_generator.py +++ b/generator/nanopb_generator.py @@ -1,33 +1,42 @@ +#!/usr/bin/python + '''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.''' -nanopb_version = "nanopb-0.2.1-dev" +nanopb_version = "nanopb-0.3.2" + +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.text_format as text_format import google.protobuf.descriptor_pb2 as descriptor 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.plugin_pb2 as plugin_pb2 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 # --------------------------------------------------------------------------- @@ -35,28 +44,34 @@ except: import time import os.path -# Values are tuple (c type, pb type) +# Values are tuple (c type, pb type, encoded size, int_size_allowed) FieldD = descriptor.FieldDescriptorProto datatypes = { - FieldD.TYPE_BOOL: ('bool', 'BOOL'), - FieldD.TYPE_DOUBLE: ('double', 'DOUBLE'), - FieldD.TYPE_FIXED32: ('uint32_t', 'FIXED32'), - FieldD.TYPE_FIXED64: ('uint64_t', 'FIXED64'), - FieldD.TYPE_FLOAT: ('float', 'FLOAT'), - FieldD.TYPE_INT32: ('int32_t', 'INT32'), - FieldD.TYPE_INT64: ('int64_t', 'INT64'), - FieldD.TYPE_SFIXED32: ('int32_t', 'SFIXED32'), - FieldD.TYPE_SFIXED64: ('int64_t', 'SFIXED64'), - FieldD.TYPE_SINT32: ('int32_t', 'SINT32'), - FieldD.TYPE_SINT64: ('int64_t', 'SINT64'), - FieldD.TYPE_UINT32: ('uint32_t', 'UINT32'), - FieldD.TYPE_UINT64: ('uint64_t', 'UINT64') + FieldD.TYPE_BOOL: ('bool', 'BOOL', 1, False), + FieldD.TYPE_DOUBLE: ('double', 'DOUBLE', 8, False), + FieldD.TYPE_FIXED32: ('uint32_t', 'FIXED32', 4, False), + FieldD.TYPE_FIXED64: ('uint64_t', 'FIXED64', 8, False), + FieldD.TYPE_FLOAT: ('float', 'FLOAT', 4, False), + FieldD.TYPE_INT32: ('int32_t', 'INT32', 10, True), + FieldD.TYPE_INT64: ('int64_t', 'INT64', 10, True), + FieldD.TYPE_SFIXED32: ('int32_t', 'SFIXED32', 4, False), + FieldD.TYPE_SFIXED64: ('int64_t', 'SFIXED64', 8, False), + FieldD.TYPE_SINT32: ('int32_t', 'SINT32', 5, True), + FieldD.TYPE_SINT64: ('int64_t', 'SINT64', 10, True), + FieldD.TYPE_UINT32: ('uint32_t', 'UINT32', 5, True), + FieldD.TYPE_UINT64: ('uint64_t', 'UINT64', 10, True) +} + +# Integer size overrides (from .proto settings) +intsizes = { + nanopb_pb2.IS_8: 'int8_t', + nanopb_pb2.IS_16: 'int16_t', + nanopb_pb2.IS_32: 'int32_t', + nanopb_pb2.IS_64: 'int64_t', } class Names: - '''Keeps a set of nested names and formats them to C identifier. - You can subclass this with your own implementation. - ''' + '''Keeps a set of nested names and formats them to C identifier.''' def __init__(self, parts = ()): if isinstance(parts, Names): parts = parts.parts @@ -82,6 +97,55 @@ def names_from_type_name(type_name): raise NotImplementedError("Lookup of non-absolute type names is not supported") return Names(type_name[1:].split('.')) +def varint_max_size(max_value): + '''Returns the maximum number of bytes a varint can take when encoded.''' + for i in range(1, 11): + if (max_value >> (i * 7)) == 0: + return i + raise ValueError("Value too large for varint: " + str(max_value)) + +assert varint_max_size(0) == 1 +assert varint_max_size(127) == 1 +assert varint_max_size(128) == 2 + +class EncodedSize: + '''Class used to represent the encoded size of a field or a message. + Consists of a combination of symbolic sizes and integer sizes.''' + def __init__(self, value = 0, symbols = []): + if isinstance(value, (str, Names)): + symbols = [str(value)] + value = 0 + self.value = value + self.symbols = symbols + + def __add__(self, other): + if isinstance(other, (int, long)): + return EncodedSize(self.value + other, self.symbols) + elif isinstance(other, (str, Names)): + return EncodedSize(self.value, self.symbols + [str(other)]) + elif isinstance(other, EncodedSize): + return EncodedSize(self.value + other.value, self.symbols + other.symbols) + else: + raise ValueError("Cannot add size: " + repr(other)) + + def __mul__(self, other): + if isinstance(other, (int, long)): + return EncodedSize(self.value * other, [str(other) + '*' + s for s in self.symbols]) + else: + raise ValueError("Cannot multiply size: " + repr(other)) + + def __str__(self): + if not self.symbols: + return str(self.value) + else: + return '(' + str(self.value) + ' + ' + ' + '.join(self.symbols) + ')' + + def upperlimit(self): + if not self.symbols: + return self.value + else: + return 2**32 - 1 + class Enum: def __init__(self, names, desc, enum_options): '''desc is EnumDescriptorProto''' @@ -107,11 +171,14 @@ class Field: '''desc is FieldDescriptorProto''' self.tag = desc.number self.struct_name = struct_name + self.union_name = None self.name = desc.name self.default = None self.max_size = None self.max_count = None self.array_decl = "" + self.enc_size = None + self.ctype = None # Parse field options if field_options.HasField("max_size"): @@ -138,112 +205,222 @@ class Field: 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 = datatypes[desc.type] + self.ctype, self.pbtype, self.enc_size, isa = datatypes[desc.type] + + # Override the field size if user wants to use smaller integers + if isa and field_options.int_size != nanopb_pb2.IS_DEFAULT: + self.ctype = intsizes[field_options.int_size] + if desc.type == FieldD.TYPE_UINT32 or desc.type == FieldD.TYPE_UINT64: + self.ctype = 'u' + self.ctype; elif desc.type == FieldD.TYPE_ENUM: self.pbtype = 'ENUM' self.ctype = names_from_type_name(desc.type_name) if self.default is not None: self.default = self.ctype + self.default + self.enc_size = 5 # protoc rejects enum values > 32 bits elif desc.type == FieldD.TYPE_STRING: self.pbtype = 'STRING' - if self.max_size is None: - can_be_static = False - else: + self.ctype = 'char' + if self.allocation == 'STATIC': self.ctype = 'char' 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 self.max_size is None: - can_be_static = False - else: + if self.allocation == 'STATIC': self.ctype = self.struct_name + self.name + 't' + self.enc_size = varint_max_size(self.max_size) + self.max_size + elif self.allocation == 'POINTER': + self.ctype = 'pb_bytes_array_t' elif desc.type == FieldD.TYPE_MESSAGE: self.pbtype = 'MESSAGE' self.ctype = self.submsgname = names_from_type_name(desc.type_name) + self.enc_size = None # Needs to be filled in after the message type is available 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_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) def __str__(self): - if self.rules == 'OPTIONAL': - result = ' bool has_' + self.name + ';\n' - elif self.rules == 'REPEATED' and self.allocation == 'STATIC': - result = ' size_t ' + self.name + '_count;\n' + 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) + elif self.rules == 'REPEATED' and self.pbtype in ['STRING', 'BYTES']: + # String/bytes 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: - result = '' - result += ' %s %s%s;' % (self.ctype, self.name, self.array_decl) + if self.rules == 'OPTIONAL' and self.allocation == 'STATIC': + result += ' bool has_' + self.name + ';\n' + elif self.rules == 'REPEATED' and self.allocation == 'STATIC': + 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': - result = 'typedef struct {\n' - result += ' size_t size;\n' - result += ' uint8_t bytes[%d];\n' % self.max_size - result += '} %s;\n' % self.ctype + result = 'typedef PB_BYTES_ARRAY_T(%d) %s;\n' % (self.max_size, self.ctype) else: - result = None + result = '' return result + def get_dependencies(self): + '''Get list of type names used by this field.''' + if self.allocation == 'STATIC': + return [str(self.ctype)] + else: + return [] + + def get_initializer(self, null_init, inner_init_only = False): + '''Return literal expression for this field's default value. + null_init: If True, initialize to a 0 value instead of default from .proto + inner_init_only: If True, exclude initialization for any count/has fields + ''' + + inner_init = None + if self.pbtype == 'MESSAGE': + if null_init: + inner_init = '%s_init_zero' % self.ctype + else: + inner_init = '%s_init_default' % self.ctype + elif self.default is None or null_init: + if self.pbtype == 'STRING': + inner_init = '""' + elif self.pbtype == 'BYTES': + inner_init = '{0, {0}}' + elif self.pbtype == 'ENUM': + inner_init = '(%s)0' % self.ctype + else: + inner_init = '0' + else: + if self.pbtype == 'STRING': + inner_init = self.default.encode('utf-8').encode('string_escape') + inner_init = inner_init.replace('"', '\\"') + inner_init = '"' + inner_init + '"' + elif self.pbtype == 'BYTES': + data = str(self.default).decode('string_escape') + data = ['0x%02x' % ord(c) for c in data] + if len(data) == 0: + inner_init = '{0, {0}}' + else: + inner_init = '{%d, {%s}}' % (len(data), ','.join(data)) + elif self.pbtype in ['FIXED32', 'UINT32']: + inner_init = str(self.default) + 'u' + elif self.pbtype in ['FIXED64', 'UINT64']: + inner_init = str(self.default) + 'ull' + elif self.pbtype in ['SFIXED64', 'INT64']: + inner_init = str(self.default) + 'll' + else: + inner_init = str(self.default) + + if inner_init_only: + return inner_init + + outer_init = None + if self.allocation == 'STATIC': + if self.rules == 'REPEATED': + outer_init = '0, {' + outer_init += ', '.join([inner_init] * self.max_count) + outer_init += '}' + elif self.rules == 'OPTIONAL': + outer_init = 'false, ' + inner_init + else: + outer_init = inner_init + elif self.allocation == 'POINTER': + if self.rules == 'REPEATED': + outer_init = '0, NULL' + else: + outer_init = 'NULL' + elif self.allocation == 'CALLBACK': + if self.pbtype == 'EXTENSION': + outer_init = 'NULL' + else: + outer_init = '{{NULL}, NULL}' + + return outer_init + def default_decl(self, declaration_only = False): '''Return definition for this field's default value.''' if self.default is None: return None - ctype, default = self.ctype, self.default + ctype = self.ctype + default = self.get_initializer(False, True) array_decl = '' if self.pbtype == 'STRING': if self.allocation != 'STATIC': return None # Not implemented - array_decl = '[%d]' % self.max_size - default = str(self.default).encode('string_escape') - default = default.replace('"', '\\"') - default = '"' + default + '"' elif self.pbtype == 'BYTES': if self.allocation != 'STATIC': return None # Not implemented - - data = self.default.decode('string_escape') - data = ['0x%02x' % ord(c) for c in data] - default = '{%d, {%s}}' % (len(data), ','.join(data)) 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. ''' - result = ' PB_FIELD(%3d, ' % self.tag + + if self.rules == 'ONEOF': + result = ' PB_ONEOF_FIELD(%s, ' % self.union_name + else: + result = ' PB_FIELD(' + + result += '%3d, ' % self.tag result += '%-8s, ' % self.pbtype result += '%s, ' % self.rules - result += '%s, ' % self.allocation + result += '%-8s, ' % self.allocation + result += '%s, ' % ("FIRST" if not prev_field_name else "OTHER") result += '%s, ' % self.struct_name result += '%s, ' % self.name result += '%s, ' % (prev_field_name or self.name) @@ -254,6 +431,8 @@ class Field: result += '0)' elif self.pbtype in ['BYTES', 'STRING'] and self.allocation != 'STATIC': result += '0)' # Arbitrary size default values not implemented + elif self.rules == 'OPTEXT': + result += '0)' # Default value for extensions is not implemented else: result += '&%s_default)' % (self.struct_name + self.name) @@ -265,15 +444,214 @@ class Field: if self.pbtype == 'MESSAGE': if self.rules == 'REPEATED' and self.allocation == 'STATIC': return 'pb_membersize(%s, %s[0])' % (self.struct_name, self.name) + elif self.rules == 'ONEOF': + return 'pb_membersize(%s, %s.%s)' % (self.struct_name, self.union_name, self.name) else: return 'pb_membersize(%s, %s)' % (self.struct_name, self.name) return max(self.tag, self.max_size, self.max_count) + def encoded_size(self, allmsgs): + '''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': + for msg in allmsgs: + if msg.name == self.submsgname: + encsize = msg.encoded_size(allmsgs) + if encsize is None: + return None # Submessage size is indeterminate + + # Include submessage length prefix + encsize += varint_max_size(encsize.upperlimit()) + break + else: + # Submessage cannot be found, this currently occurs when + # the submessage type is defined in a different file. + # Instead of direct numeric value, reference the size that + # has been #defined in the other file. + encsize = EncodedSize(self.submsgname + 'size') + + # We will have to make a conservative assumption on the length + # prefix size, though. + encsize += 5 + + elif self.enc_size is None: + raise RuntimeError("Could not determine encoded size for %s.%s" + % (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': + # Decoders must be always able to handle unpacked arrays. + # Therefore we have to reserve space for it, even though + # we emit packed arrays ourselves. + encsize *= self.max_count + + return encsize + + +class ExtensionRange(Field): + def __init__(self, struct_name, range_start, field_options): + '''Implements a special pb_extension_t* field in an extensible message + structure. The range_start signifies the index at which the extensions + start. Not necessarily all tags above this are extensions, it is merely + a speed optimization. + ''' + self.tag = range_start + self.struct_name = struct_name + self.name = 'extensions' + self.pbtype = 'EXTENSION' + self.rules = 'OPTIONAL' + self.allocation = 'CALLBACK' + self.ctype = 'pb_extension_t' + self.array_decl = '' + 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, allmsgs): + # We exclude extensions from the count, because they cannot be known + # until runtime. Other option would be to return None here, but this + # way the value remains useful if extensions are not used. + return EncodedSize(0) + +class ExtensionField(Field): + def __init__(self, struct_name, desc, field_options): + 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: + self.skip = False + self.rules = 'OPTEXT' + + def tags(self): + '''Return the #define for the tag number of this field.''' + identifier = '%s_tag' % self.fullname + return '#define %-40s %d\n' % (identifier, self.tag) + + def extension_decl(self): + '''Declaration of the extension type in the .pb.h file''' + if self.skip: + 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())) + + def extension_def(self): + '''Definition of the extension type in the .pb.c file''' + + if self.skip: + return '' + result = 'typedef struct {\n' + result += str(self) + result += '\n} %s;\n\n' % self.struct_name + result += ('static const pb_field_t %s_field = \n %s;\n\n' % + (self.fullname, self.pb_field_t(None))) + result += 'const pb_extension_type_t %s = {\n' % self.fullname + result += ' NULL,\n' + result += ' NULL,\n' + result += ' &%s_field\n' % self.fullname + result += '};\n' + return result + + +# --------------------------------------------------------------------------- +# Generation of oneofs (unions) +# --------------------------------------------------------------------------- + +class OneOf(Field): + def __init__(self, struct_name, oneof_desc): + self.struct_name = struct_name + self.name = oneof_desc.name + self.ctype = 'union' + self.fields = [] + + def add_field(self, field): + if field.allocation == 'CALLBACK': + raise Exception("Callback fields inside of oneof are not supported" + + " (field %s)" % field.name) + + field.union_name = self.name + field.rules = 'ONEOF' + self.fields.append(field) + self.fields.sort(key = lambda f: f.tag) + + # Sort by the lowest tag number inside union + self.tag = min([f.tag for f in self.fields]) + + def __cmp__(self, other): + return cmp(self.tag, other.tag) + + def __str__(self): + result = '' + if self.fields: + result += ' pb_size_t which_' + self.name + ";\n" + result += ' union {\n' + for f in self.fields: + result += ' ' + str(f).replace('\n', '\n ') + '\n' + result += ' } ' + self.name + ';' + return result + + def types(self): + return ''.join([f.types() for f in self.fields]) + + def get_dependencies(self): + deps = [] + for f in self.fields: + deps += f.get_dependencies() + return deps + + def get_initializer(self, null_init): + return '0, {' + self.fields[0].get_initializer(null_init) + '}' + + def default_decl(self, declaration_only = False): + return None + + def tags(self): + return '\n'.join([f.tags() for f in self.fields]) + def pb_field_t(self, prev_field_name): + prev_field_name = prev_field_name or self.name + result = ',\n'.join([f.pb_field_t(prev_field_name) for f in self.fields]) + return result + def largest_field_value(self): + return max([f.largest_field_value() for f in self.fields]) + def encoded_size(self, allmsgs): + largest = EncodedSize(0) + for f in self.fields: + size = f.encoded_size(allmsgs) + if size is None: + return None + elif size.symbols: + return None # Cannot resolve maximum of symbols + elif size.value > largest.value: + largest = size + + return largest # --------------------------------------------------------------------------- # Generation of messages (structures) @@ -284,11 +662,40 @@ class Message: def __init__(self, names, desc, message_options): self.name = names self.fields = [] - + self.oneofs = {} + no_unions = [] + + if hasattr(desc, 'oneof_decl'): + for i, f in enumerate(desc.oneof_decl): + oneof_options = get_nanopb_suboptions(desc, message_options, self.name + f.name) + if oneof_options.no_unions: + no_unions.append(i) # No union, but add fields normally + elif oneof_options.type == nanopb_pb2.FT_IGNORE: + pass # No union and skip fields also + else: + oneof = OneOf(self.name, f) + self.oneofs[i] = oneof + self.fields.append(oneof) + for f in desc.field: - field_options = get_nanopb_suboptions(f, message_options) + field_options = get_nanopb_suboptions(f, message_options, self.name + f.name) + if field_options.type == nanopb_pb2.FT_IGNORE: + continue + + field = Field(self.name, f, field_options) + if (hasattr(f, 'oneof_index') and + f.HasField('oneof_index') and + f.oneof_index not in no_unions): + if f.oneof_index in self.oneofs: + 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(Field(self.name, f, field_options)) + self.fields.append(ExtensionRange(self.name, range_start, field_options)) self.packed = message_options.packed_struct self.ordered_fields = self.fields[:] @@ -296,7 +703,10 @@ class Message: def get_dependencies(self): '''Get list of type names that this structure refers to.''' - return [str(field.ctype) for field in self.fields] + deps = [] + for f in self.fields: + deps += f.get_dependencies() + return deps def __str__(self): result = 'typedef struct _%s {\n' % self.name @@ -313,15 +723,24 @@ class Message: 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): - result = "" - for field in self.fields: - types = field.types() - if types is not None: - result += types + '\n' - return result + 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 = "" @@ -331,25 +750,55 @@ class Message: result += default + '\n' return result + def count_required_fields(self): + '''Returns number of required fields inside this message''' + count = 0 + for f in self.fields: + if not isinstance(f, OneOf): + if f.rules == 'REQUIRED': + count += 1 + return count + + def count_all_fields(self): + count = 0 + for f in self.fields: + if isinstance(f, OneOf): + count += len(f.fields) + else: + count += 1 + return count + def fields_declaration(self): - result = 'extern const pb_field_t %s_fields[%d];' % (self.name, len(self.fields) + 1) + result = 'extern const pb_field_t %s_fields[%d];' % (self.name, self.count_all_fields() + 1) return result def fields_definition(self): - result = 'const pb_field_t %s_fields[%d] = {\n' % (self.name, len(self.fields) + 1) + 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) result += ',\n' - prev = field.name + if isinstance(field, OneOf): + prev = field.name + '.' + field.fields[-1].name + else: + prev = field.name result += ' PB_LAST_FIELD\n};' return result - - - + def encoded_size(self, allmsgs): + '''Return the maximum size that this message can take when encoded. + If the size cannot be determined, returns None. + ''' + size = EncodedSize(0) + for field in self.fields: + fsize = field.encoded_size(allmsgs) + if fsize is None: + return None + size += fsize + + return size # --------------------------------------------------------------------------- @@ -371,11 +820,23 @@ def iterate_messages(desc, names = Names()): for x in iterate_messages(submsg, sub_names): yield x +def iterate_extensions(desc, names = Names()): + '''Recursively find all extensions. + For each, yield name, FieldDescriptorProto. + ''' + for extension in desc.extension: + yield names, extension + + for subname, subdesc in iterate_messages(desc, names): + for extension in subdesc.extension: + yield subname, extension + def parse_file(fdesc, file_options): - '''Takes a FileDescriptorProto and returns tuple (enum, messages).''' + '''Takes a FileDescriptorProto and returns tuple (enums, messages, extensions).''' enums = [] messages = [] + extensions = [] if fdesc.package: base_name = Names(fdesc.package.split('.')) @@ -383,16 +844,25 @@ def parse_file(fdesc, file_options): base_name = Names() for enum in fdesc.enum_type: - enum_options = get_nanopb_suboptions(enum, file_options) + enum_options = get_nanopb_suboptions(enum, file_options, base_name + enum.name) 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) + message_options = get_nanopb_suboptions(message, file_options, names) + + if message_options.skip_message: + continue + messages.append(Message(names, message, message_options)) for enum in message.enum_type: - enum_options = get_nanopb_suboptions(enum, message_options) + enum_options = get_nanopb_suboptions(enum, message_options, names + enum.name) enums.append(Enum(names, enum, enum_options)) + for names, extension in iterate_extensions(fdesc, base_name): + field_options = get_nanopb_suboptions(extension, file_options, names + extension.name) + if field_options.type != nanopb_pb2.FT_IGNORE: + extensions.append(ExtensionField(names, extension, field_options)) + # Fix field default values where enum short names are used. for enum in enums: if not enum.options.long_names: @@ -402,7 +872,7 @@ def parse_file(fdesc, file_options): idx = enum.value_longnames.index(field.default) field.default = enum.values[idx][0] - return enums, messages + return enums, messages, extensions def toposort2(data): '''Topological sort. @@ -445,25 +915,37 @@ def make_identifier(headername): result += '_' return result -def generate_header(dependencies, headername, enums, messages, options): +def generate_header(dependencies, headername, enums, messages, extensions, options): '''Generate content for a header file. Generates strings, which should be concatenated and stored to file. ''' yield '/* Automatically generated nanopb header */\n' - yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime()) + 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_\n' % symbol - yield '#define _PB_%s_\n' % symbol - yield options.libformat % ('pb.h') + yield '#ifndef PB_%s_INCLUDED\n' % symbol + yield '#define PB_%s_INCLUDED\n' % symbol + try: + yield options.libformat % ('pb.h') + except TypeError: + # no %s specified - use whatever was passed in as options.libformat + yield options.libformat yield '\n' for dependency in dependencies: noext = os.path.splitext(dependency)[0] - yield options.genformat % (noext + '.' + options.extension + '.h') + yield options.genformat % (noext + options.extension + '.h') 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' + yield '#ifdef __cplusplus\n' yield 'extern "C" {\n' yield '#endif\n\n' @@ -476,31 +958,71 @@ def generate_header(dependencies, headername, enums, messages, options): for msg in sort_dependencies(messages): yield msg.types() yield str(msg) + '\n\n' + + if extensions: + yield '/* Extensions */\n' + for extension in extensions: + yield extension.extension_decl() + yield '\n' yield '/* Default values for struct fields */\n' for msg in messages: yield msg.default_decl(True) yield '\n' + yield '/* Initializer values for message structs */\n' + for msg in messages: + identifier = '%s_init_default' % msg.name + yield '#define %-40s %s\n' % (identifier, msg.get_initializer(False)) + for msg in messages: + 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(messages): + for field in msg.fields: + yield field.tags() + for extension in extensions: + yield extension.tags() + yield '\n' + yield '/* Struct field encoding specification for nanopb */\n' for msg in messages: yield msg.fields_declaration() + '\n' + yield '\n' - yield '\n#ifdef __cplusplus\n' + yield '/* Maximum encoded size of messages (where known) */\n' + for msg in messages: + msize = msg.encoded_size(messages) + if msize is not None: + identifier = '%s_size' % msg.name + yield '#define %-40s %s\n' % (identifier, msize) + yield '\n' + + yield '#ifdef __cplusplus\n' yield '} /* extern "C" */\n' yield '#endif\n' # End of header yield '\n#endif\n' -def generate_source(headername, enums, messages): +def generate_source(headername, enums, messages, extensions, options): '''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()) + if options.notimestamp: + yield '/* Generated by %s */\n\n' % (nanopb_version) + else: + 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 messages: yield msg.default_decl(False) @@ -508,11 +1030,14 @@ def generate_source(headername, enums, messages): for msg in messages: yield msg.fields_definition() + '\n\n' + + for ext in extensions: + yield ext.extension_def() + '\n' + # Add checks for numeric limits if messages: - count_required_fields = lambda m: len([f for f in msg.fields if f.rules == 'REQUIRED']) - largest_msg = max(messages, key = count_required_fields) - largest_count = count_required_fields(largest_msg) + largest_msg = max(messages, key = lambda m: m.count_required_fields()) + largest_count = largest_msg.count_required_fields() if largest_count > 64: yield '\n/* Check that missing required fields will be properly detected */\n' yield '#if PB_MAX_REQUIRED_FIELDS < %d\n' % largest_count @@ -520,7 +1045,6 @@ def generate_source(headername, enums, messages): yield ' setting PB_MAX_REQUIRED_FIELDS to %d or more.\n' % largest_count yield '#endif\n' - # Add checks for numeric limits worst = 0 worst_field = '' checks = [] @@ -538,6 +1062,23 @@ def generate_source(headername, enums, messages): 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: + 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) + msgs = '_'.join(str(n) for n in checks_msgnames) + yield '/* If you get an error here, it means that you need to define PB_FIELD_32BIT\n' + yield ' * compile-time option. You can do that in pb.h or on compiler command line.\n' + yield ' * \n' + yield ' * The reason you need to do this is that some of your messages contain tag\n' + yield ' * numbers or field sizes that are larger than what can fit in 8 or 16 bit\n' + yield ' * field descriptors.\n' + 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: @@ -545,18 +1086,15 @@ def generate_source(headername, enums, messages): else: assertion = ' && '.join(str(c) + ' < 256' for c in checks) 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 '/* If you get an error here, it means that you need to define PB_FIELD_16BIT\n' + yield ' * compile-time option. You can do that in pb.h or on compiler command line.\n' + yield ' * \n' + yield ' * The reason you need to do this is that some of your messages contain tag\n' + yield ' * numbers or field sizes that are larger than what can fit in the default\n' + yield ' * 8 bit descriptors.\n' + yield ' */\n' + yield 'PB_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 '#if !defined(PB_FIELD_32BIT)\n' - if worst > 65535: - 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) - 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' # Add check for sizeof(double) has_double = False @@ -571,10 +1109,73 @@ def generate_source(headername, enums, messages): yield ' * These are not directly supported by nanopb, but see example_avr_double.\n' yield ' * To get rid of this error, remove any double fields from your .proto.\n' yield ' */\n' - yield 'STATIC_ASSERT(sizeof(double) == 8, DOUBLE_MUST_BE_8_BYTES)\n' + yield 'PB_STATIC_ASSERT(sizeof(double) == 8, DOUBLE_MUST_BE_8_BYTES)\n' yield '\n' +# --------------------------------------------------------------------------- +# Options parsing for the .proto files +# --------------------------------------------------------------------------- + +from fnmatch import fnmatch + +def read_options_file(infile): + '''Parse a separate options file to list: + [(namemask, options), ...] + ''' + results = [] + for line in infile: + line = line.strip() + if not line or line.startswith('//') or line.startswith('#'): + continue + + parts = line.split(None, 1) + opts = nanopb_pb2.NanoPBOptions() + text_format.Merge(parts[1], opts) + results.append((parts[0], opts)) + + return results + +class Globals: + '''Ugly global variables, should find a good way to pass these.''' + verbose_options = False + separate_options = [] + matched_namemasks = set() + +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 + 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) + + if Globals.verbose_options: + sys.stderr.write("Options for " + dotname + ": ") + sys.stderr.write(text_format.MessageToString(new_options) + "\n") + + return new_options + # --------------------------------------------------------------------------- # Command line interface @@ -583,7 +1184,6 @@ def generate_source(headername, enums, 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 ...", @@ -591,14 +1191,18 @@ optparser = OptionParser( "Output will be written to file.pb.h and file.pb.c.") optparser.add_option("-x", dest="exclude", metavar="FILE", action="append", default=[], help="Exclude file from generated #include list.") -optparser.add_option("-e", "--extension", dest="extension", metavar="EXTENSION", default="pb", - help="Set extension to use instead of 'pb' for generated files. [default: %default]") +optparser.add_option("-e", "--extension", dest="extension", metavar="EXTENSION", default=".pb", + help="Set extension to use instead of '.pb' for generated files. [default: %default]") +optparser.add_option("-f", "--options-file", dest="options_file", metavar="FILE", default="%s.options", + help="Set name of a separate generator options file.") optparser.add_option("-Q", "--generated-include-format", dest="genformat", metavar="FORMAT", default='#include "%s"\n', help="Set format string to use for including other .pb.h files. [default: %default]") optparser.add_option("-L", "--library-include-format", dest="libformat", metavar="FORMAT", default='#include <%s>\n', help="Set format string to use for including the nanopb pb.h header. [default: %default]") +optparser.add_option("-T", "--no-timestamp", dest="notimestamp", action="store_true", default=False, + help="Don't add timestamp to .pb.h and .pb.c preambles") 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, @@ -606,81 +1210,148 @@ optparser.add_option("-v", "--verbose", dest="verbose", action="store_true", def 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) +def process_file(filename, fdesc, options): + '''Process a single file. + 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. - 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 + Returns a dict: + {'headername': Name of header file, + 'headerdata': Data for the .h header file, + 'sourcename': Name of the source code file, + 'sourcedata': Data for the .c source code file + } + ''' + 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: + optfilename = options.options_file % os.path.splitext(filename)[0] + except TypeError: + # No %s specified, use the filename as-is + optfilename = options.options_file + had_abspath = True + + if os.path.isfile(optfilename): + if options.verbose: + sys.stderr.write('Reading options from ' + optfilename + '\n') + + Globals.separate_options = read_options_file(open(optfilename, "rU")) else: - raise Exception("Unknown options type") + # If we are given a full filename and it does not exist, give an error. + # However, don't give error when we automatically look for .options file + # with the same name as .proto. + if options.verbose or had_abspath: + sys.stderr.write('Options file not found: ' + optfilename) + + Globals.separate_options = [] + + Globals.matched_namemasks = set() - if subdesc.options.HasExtension(ext_type): - ext = subdesc.options.Extensions[ext_type] - new_options.MergeFrom(ext) + # Parse the file + file_options = get_nanopb_suboptions(fdesc, toplevel_options, Names([filename])) + enums, messages, extensions = parse_file(fdesc, file_options) + + # Decide the file names + noext = os.path.splitext(filename)[0] + headername = noext + options.extension + '.h' + sourcename = noext + options.extension + '.c' + headerbasename = os.path.basename(headername) - return new_options + # 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 + dependencies = [d for d in fdesc.dependency if d not in excludes] + + headerdata = ''.join(generate_header(dependencies, headerbasename, enums, + messages, extensions, options)) + + sourcedata = ''.join(generate_source(headerbasename, enums, + messages, extensions, options)) -def process(filenames, options): - '''Process the files given on the command line.''' + # Check if there were any lines in .options that did not match a member + unmatched = [n for n,o in Globals.separate_options if n not in Globals.matched_namemasks] + if unmatched and not options.quiet: + sys.stderr.write("Following patterns in " + optfilename + " did not match any fields: " + + ', '.join(unmatched) + "\n") + if not Globals.verbose_options: + sys.stderr.write("Use protoc --nanopb-out=-v:. to see a list of the field names.\n") + + 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() - return False + sys.exit(1) if options.quiet: options.verbose = False - - toplevel_options = nanopb_pb2.NanoPBOptions() - for s in options.settings: - text_format.Merge(s, toplevel_options) + + Globals.verbose_options = options.verbose for filename in filenames: - data = open(filename, 'rb').read() - fdesc = descriptor.FileDescriptorSet.FromString(data) - - 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 + '.' + options.extension + '.h' - sourcename = noext + '.' + options.extension + '.c' - headerbasename = os.path.basename(headername) + results = process_file(filename, None, options) if not options.quiet: - print "Writing to " + headername + " and " + sourcename - - # 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 - dependencies = [d for d in fdesc.file[0].dependency if d not in excludes] - - header = open(headername, 'w') - for part in generate_header(dependencies, headerbasename, enums, messages, options): - header.write(part) - - source = open(sourcename, 'w') - for part in generate_source(headerbasename, enums, messages): - source.write(part) + 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']) - return True +def main_plugin(): + '''Main function when invoked as a protoc plugin.''' -if __name__ == '__main__': - options, filenames = optparser.parse_args() - status = process(filenames, options) + 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) - if not status: - sys.exit(1) + data = sys.stdin.read() + request = plugin_pb2.CodeGeneratorRequest.FromString(data) + + import shlex + args = shlex.split(request.parameter) + options, dummy = optparser.parse_args(args) + + Globals.verbose_options = options.verbose + + response = plugin_pb2.CodeGeneratorResponse() + + for filename in request.file_to_generate: + for fdesc in request.proto_file: + if fdesc.name == filename: + results = process_file(filename, fdesc, options) + + f = response.file.add() + f.name = results['headername'] + f.content = results['headerdata'] + + f = response.file.add() + f.name = results['sourcename'] + f.content = results['sourcedata'] + sys.stdout.write(response.SerializeToString()) + +if __name__ == '__main__': + # Check if we are running as a plugin under protoc + if 'protoc-gen-' in sys.argv[0] or '--protoc-plugin' in sys.argv: + main_plugin() + else: + main_cli() +