diff options
Diffstat (limited to 'libs/nanopb/generator/nanopb_generator.py')
| -rwxr-xr-x | libs/nanopb/generator/nanopb_generator.py | 1671 |
1 files changed, 1671 insertions, 0 deletions
diff --git a/libs/nanopb/generator/nanopb_generator.py b/libs/nanopb/generator/nanopb_generator.py new file mode 100755 index 00000000..42669ace --- /dev/null +++ b/libs/nanopb/generator/nanopb_generator.py @@ -0,0 +1,1671 @@ +#!/usr/bin/env python + +from __future__ import unicode_literals + +'''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.''' +nanopb_version = "nanopb-0.3.9-dev" + +import sys +import re +from functools import reduce + +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: + sys.stderr.write(''' + ************************************************************* + *** Could not import the Google protobuf Python libraries *** + *** Try installing package 'python-protobuf' or similar. *** + ************************************************************* + ''' + '\n') + raise + +try: + import proto.nanopb_pb2 as nanopb_pb2 + import proto.plugin_pb2 as plugin_pb2 +except TypeError: + sys.stderr.write(''' + **************************************************************************** + *** Got TypeError when importing the protocol definitions for generator. *** + *** This usually means that the protoc in your path doesn't match the *** + *** Python protobuf library version. *** + *** *** + *** Please check the output of the following commands: *** + *** which protoc *** + *** protoc --version *** + *** python -c 'import google.protobuf; print(google.protobuf.__file__)' *** + **************************************************************************** + ''' + '\n') + raise +except: + 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 +# --------------------------------------------------------------------------- + +import time +import os.path + +# Values are tuple (c type, pb type, encoded size, int_size_allowed) +FieldD = descriptor.FieldDescriptorProto +datatypes = { + 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', +} + +# String types (for python 2 / python 3 compatibility) +try: + strtypes = (unicode, str) +except NameError: + strtypes = (str, ) + +class Names: + '''Keeps a set of nested names and formats them to C identifier.''' + def __init__(self, parts = ()): + if isinstance(parts, Names): + parts = parts.parts + self.parts = tuple(parts) + + def __str__(self): + return '_'.join(self.parts) + + def __add__(self, other): + if isinstance(other, strtypes): + return Names(self.parts + (other,)) + elif isinstance(other, tuple): + 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] != '.': + 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.''' + if max_value < 0: + max_value = 2**64 - max_value + 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(-1) == 10 +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, EncodedSize): + self.value = value.value + self.symbols = value.symbols + elif isinstance(value, strtypes + (Names,)): + self.symbols = [str(value)] + self.value = 0 + else: + self.value = value + self.symbols = symbols + + def __add__(self, other): + if isinstance(other, int): + return EncodedSize(self.value + other, self.symbols) + elif isinstance(other, strtypes + (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): + 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''' + + 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] + 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] + 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 + + result += '\n#define _%s_MIN %s' % (self.names, self.values[0][0]) + result += '\n#define _%s_MAX %s' % (self.names, self.values[-1][0]) + result += '\n#define _%s_ARRAYSIZE ((%s)(%s+1))' % (self.names, self.names, self.values[-1][0]) + + 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]) + + if self.options.enum_to_string: + result += '\nconst char *%s_name(%s v);\n' % (self.names, self.names) + + return result + + def enum_to_string_definition(self): + if not self.options.enum_to_string: + return "" + + result = 'const char *%s_name(%s v) {\n' % (self.names, self.names) + result += ' switch (v) {\n' + + for ((enumname, _), strname) in zip(self.values, self.value_longnames): + # Strip off the leading type name from the string value. + strval = str(strname)[len(str(self.names)) + 1:] + result += ' case %s: return "%s";\n' % (enumname, strval) + + result += ' }\n' + result += ' return "unknown";\n' + result += '}\n' + + return result + +class FieldMaxSize: + def __init__(self, worst = 0, checks = [], field_name = 'undefined'): + if isinstance(worst, list): + self.worst = max(i for i in worst if i is not None) + else: + self.worst = worst + + self.worst_field = field_name + self.checks = list(checks) + + def extend(self, extend, field_name = None): + self.worst = max(self.worst, extend.worst) + + if self.worst == extend.worst: + self.worst_field = extend.worst_field + + self.checks.extend(extend.checks) + +class Field: + def __init__(self, struct_name, desc, field_options): + '''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 + + if field_options.type == nanopb_pb2.FT_INLINE: + # Before nanopb-0.3.8, fixed length bytes arrays were specified + # by setting type to FT_INLINE. But to handle pointer typed fields, + # it makes sense to have it as a separate option. + field_options.type = nanopb_pb2.FT_STATIC + field_options.fixed_length = True + + # Parse field options + if field_options.HasField("max_size"): + self.max_size = field_options.max_size + + if desc.type == FieldD.TYPE_STRING and field_options.HasField("max_length"): + # max_length overrides max_size for strings + self.max_size = field_options.max_length + 1 + + 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_REPEATED: + self.rules = 'REPEATED' + if self.max_count is None: + can_be_static = False + else: + self.array_decl = '[%d]' % self.max_count + elif field_options.proto3: + self.rules = 'SINGULAR' + elif desc.label == FieldD.LABEL_REQUIRED: + self.rules = 'REQUIRED' + elif desc.label == FieldD.LABEL_OPTIONAL: + self.rules = 'OPTIONAL' + 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 desc.type in datatypes: + 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 = None # Needs to be filled in when enum values are known + elif desc.type == FieldD.TYPE_STRING: + self.pbtype = 'STRING' + 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: + if field_options.fixed_length: + self.pbtype = 'FIXED_LENGTH_BYTES' + self.enc_size = varint_max_size(self.max_size) + self.max_size + self.ctype = 'pb_byte_t' + self.array_decl += '[%d]' % self.max_size + else: + self.pbtype = 'BYTES' + self.ctype = 'pb_bytes_array_t' + 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 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) + + 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) + elif self.pbtype == 'FIXED_LENGTH_BYTES': + # Pointer to fixed size array + result += ' %s (*%s)%s;' % (self.ctype, self.name, self.array_decl) + 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: + 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 PB_BYTES_ARRAY_T(%d) %s;\n' % (self.max_size, self.ctype) + else: + 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 == 'FIXED_LENGTH_BYTES': + inner_init = '{0}' + elif self.pbtype in ('ENUM', 'UENUM'): + inner_init = '(%s)0' % self.ctype + else: + inner_init = '0' + else: + if self.pbtype == 'STRING': + inner_init = self.default.replace('"', '\\"') + inner_init = '"' + inner_init + '"' + elif self.pbtype == 'BYTES': + data = ['0x%02x' % ord(c) for c in self.default] + if len(data) == 0: + inner_init = '{0, {0}}' + else: + inner_init = '{%d, {%s}}' % (len(data), ','.join(data)) + elif self.pbtype == 'FIXED_LENGTH_BYTES': + data = ['0x%02x' % ord(c) for c in self.default] + if len(data) == 0: + inner_init = '{0}' + else: + inner_init = '{%s}' % ','.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 = 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 + elif self.pbtype == 'BYTES': + if self.allocation != 'STATIC': + return None # Not implemented + elif self.pbtype == 'FIXED_LENGTH_BYTES': + if self.allocation != 'STATIC': + return None # Not implemented + array_decl = '[%d]' % self.max_size + + 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, union_index = None): + '''Return the pb_field_t initializer to use in the constant array. + prev_field_name is the name of the previous field or None. For OneOf + unions, union_index is the index of this field inside the OneOf. + ''' + + if self.rules == 'ONEOF': + if self.anonymous: + result = ' PB_ANONYMOUS_ONEOF_FIELD(%s, ' % self.union_name + else: + 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 += '%-8s, ' % self.allocation + + if union_index is not None and union_index > 0: + result += 'UNION, ' + elif prev_field_name is None: + result += 'FIRST, ' + else: + result += 'OTHER, ' + + 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: + result += '0)' + elif self.pbtype in ['BYTES', 'STRING', 'FIXED_LENGTH_BYTES'] 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) + + return result + + def get_last_field_name(self): + return self.name + + 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.''' + check = [] + if self.pbtype == 'MESSAGE' and self.allocation == 'STATIC': + if self.rules == 'REPEATED': + check.append('pb_membersize(%s, %s[0])' % (self.struct_name, self.name)) + elif self.rules == 'ONEOF': + if self.anonymous: + check.append('pb_membersize(%s, %s)' % (self.struct_name, self.name)) + else: + check.append('pb_membersize(%s, %s.%s)' % (self.struct_name, self.union_name, self.name)) + else: + check.append('pb_membersize(%s, %s)' % (self.struct_name, self.name)) + elif self.pbtype == 'BYTES' and self.allocation == 'STATIC': + if self.max_size > 251: + check.append('pb_membersize(%s, %s)' % (self.struct_name, self.name)) + + return FieldMaxSize([self.tag, self.max_size, self.max_count], + check, + ('%s.%s' % (self.struct_name, self.name))) + + def encoded_size(self, dependencies): + '''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: + submsg = dependencies[str(self.submsgname)] + encsize = submsg.encoded_size(dependencies) + if encsize is not None: + # Include submessage length prefix + encsize += varint_max_size(encsize.upperlimit()) + + if encsize is None: + # Submessage or its size cannot be found. + # This can occur if submessage is defined in different + # file, and it or its .options could not be found. + # 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.pbtype in ['ENUM', 'UENUM']: + if str(self.ctype) in dependencies: + enumtype = dependencies[str(self.ctype)] + encsize = enumtype.encoded_size() + else: + # Conservative assumption + encsize = 10 + + 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. For length of 1, packed + # arrays are larger however so we need to add allowance + # for the length byte. + encsize *= self.max_count + + if self.max_count == 1: + encsize += 1 + + 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, dependencies): + # 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.pbtype = 'oneof' + self.fields = [] + self.allocation = 'ONEOF' + self.default = None + self.rules = 'ONEOF' + self.anonymous = False + + 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' + field.anonymous = self.anonymous + 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 __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' + if self.anonymous: + result += ' };' + else: + 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 ''.join([f.tags() for f in self.fields]) + + def pb_field_t(self, prev_field_name): + parts = [] + for union_index, field in enumerate(self.fields): + parts.append(field.pb_field_t(prev_field_name, union_index)) + return ',\n'.join(parts) + + def get_last_field_name(self): + if self.anonymous: + return self.fields[-1].name + else: + return self.name + '.' + self.fields[-1].name + + def largest_field_value(self): + largest = FieldMaxSize() + for f in self.fields: + largest.extend(f.largest_field_value()) + return largest + + def encoded_size(self, dependencies): + '''Returns the size of the largest oneof field.''' + largest = EncodedSize(0) + for f in self.fields: + size = EncodedSize(f.encoded_size(dependencies)) + if size.value 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) +# --------------------------------------------------------------------------- + + +class Message: + def __init__(self, names, desc, message_options): + self.name = names + self.fields = [] + self.oneofs = {} + no_unions = [] + + if message_options.msgid: + self.msgid = message_options.msgid + + 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) + if oneof_options.anonymous_oneof: + oneof.anonymous = True + self.oneofs[i] = oneof + self.fields.append(oneof) + + for f in desc.field: + 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(ExtensionRange(self.name, range_start, field_options)) + + self.packed = message_options.packed_struct + self.ordered_fields = self.fields[:] + self.ordered_fields.sort() + + def get_dependencies(self): + '''Get list of type names that this structure refers to.''' + deps = [] + for f in self.fields: + deps += f.get_dependencies() + return deps + + def __str__(self): + result = 'typedef struct _%s {\n' % self.name + + if not self.ordered_fields: + # Empty structs are not allowed in C standard. + # Therefore add a dummy field if an empty message occurs. + result += ' char dummy_field;' + + result += '\n'.join([str(f) for f in self.ordered_fields]) + result += '\n/* @@protoc_insertion_point(struct:%s) */' % self.name + 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: + default = field.default_decl(declaration_only) + if default is not None: + 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, self.count_all_fields() + 1) + return result + + 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) + result += ',\n' + prev = field.get_last_field_name() + + result += ' PB_LAST_FIELD\n};' + return result + + def encoded_size(self, dependencies): + '''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(dependencies) + if fsize is None: + return None + size += fsize + + return size + + +# --------------------------------------------------------------------------- +# Processing of entire .proto files +# --------------------------------------------------------------------------- + +def iterate_messages(desc, names = Names()): + '''Recursively find all messages. For each, yield name, DescriptorProto.''' + if hasattr(desc, 'message_type'): + 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 + +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 toposort2(data): + '''Topological sort. + From http://code.activestate.com/recipes/577413-topological-sort/ + This function is under the MIT license. + ''' + for k, v in list(data.items()): + v.discard(k) # Ignore self dependencies + extra_items_in_deps = reduce(set.union, list(data.values()), set()) - set(data.keys()) + data.update(dict([(item, set()) for item in extra_items_in_deps])) + while True: + ordered = set(item for item,dep in list(data.items()) if not dep) + if not ordered: + break + for item in sorted(ordered): + yield item + data = dict([(item, (dep - ordered)) for item,dep in list(data.items()) + if item not in ordered]) + assert not data, "A cyclic dependency exists amongst %r" % data + +def sort_dependencies(messages): + '''Sort a list of Messages based on dependencies.''' + dependencies = {} + message_by_name = {} + 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] + +def make_identifier(headername): + '''Make #ifndef identifier that contains uppercase A-Z and digits 0-9''' + result = "" + for c in headername.upper(): + if c.isalnum(): + result += c + else: + result += '_' + return result + +class ProtoFile: + def __init__(self, fdesc, file_options): + '''Takes a FileDescriptorProto and parses it.''' + self.fdesc = fdesc + 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) + + def parse(self): + 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: + for message in self.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] + + # Fix field data types where enums have negative values. + for enum in other.enums: + if not enum.has_negative(): + for message in self.messages: + for field in message.fields: + if field.pbtype == 'ENUM' and field.ctype == enum.names: + field.pbtype = 'UENUM' + + def generate_header(self, includes, headername, options): + '''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()) + + if self.fdesc.package: + symbol = make_identifier(self.fdesc.package + '_' + headername) + else: + symbol = make_identifier(headername) + 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 incfile in includes: + noext = os.path.splitext(incfile)[0] + yield options.genformat % (noext + options.extension + '.h') + yield '\n' + + yield '/* @@protoc_insertion_point(includes) */\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' + + 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 + yield '#define %-40s %s\n' % (identifier, msg.get_initializer(False)) + for msg in self.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(self.messages): + for field in msg.fields: + yield field.tags() + 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) + identifier = '%s_size' % msg.name + if msize is not None: + yield '#define %-40s %s\n' % (identifier, msize) + else: + yield '/* %s depends on runtime parameters */\n' % identifier + 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'): + yield '#define PB_MSG_%d %s\n' % (msg.msgid, msg.name) + yield '\n' + + symbol = make_identifier(headername.split('.')[0]) + yield '#define %s_MESSAGES \\\n' % symbol + + for msg in self.messages: + m = "-1" + msize = msg.encoded_size(self.dependencies) + if msize is not None: + m = msize + if hasattr(msg,'msgid'): + yield '\tPB_MSG(%d,%s,%s) \\\n' % (msg.msgid, m, msg.name) + yield '\n' + + for msg in self.messages: + if hasattr(msg,'msgid'): + yield '#define %s_msgid %d\n' % (msg.name, msg.msgid) + yield '\n' + + yield '#endif\n\n' + + yield '#ifdef __cplusplus\n' + yield '} /* extern "C" */\n' + yield '#endif\n' + + # End of header + yield '/* @@protoc_insertion_point(eof) */\n' + 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) + else: + yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime()) + yield options.genformat % (headername) + yield '\n' + yield '/* @@protoc_insertion_point(includes) */\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' + + for enum in self.enums: + yield enum.enum_to_string_definition() + '\n' + + # Add checks for numeric limits + if self.messages: + largest_msg = max(self.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 + yield '#error Properly detecting missing required fields in %s requires \\\n' % largest_msg.name + yield ' setting PB_MAX_REQUIRED_FIELDS to %d or more.\n' % largest_count + yield '#endif\n' + + max_field = FieldMaxSize() + checks_msgnames = [] + for msg in self.messages: + checks_msgnames.append(msg.name) + for field in msg.fields: + max_field.extend(field.largest_field_value()) + + worst = max_field.worst + worst_field = max_field.worst_field + checks = max_field.checks + + 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: + 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) + 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_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' + + # 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' + 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 'PB_STATIC_ASSERT(sizeof(double) == 8, DOUBLE_MUST_BE_8_BYTES)\n' + + yield '\n' + yield '/* @@protoc_insertion_point(eof) */\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 = [] + data = infile.read() + data = re.sub('/\*.*?\*/', '', data, flags = re.MULTILINE) + data = re.sub('//.*?$', '', data, flags = re.MULTILINE) + data = re.sub('#.*?$', '', data, flags = re.MULTILINE) + for i, line in enumerate(data.split('\n')): + 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: + sys.stderr.write("%s:%d: " % (infile.name, i + 1) + + "Unparseable option line: '%s'. " % line + + "Error: %s\n" % str(e)) + continue + 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) + + if hasattr(subdesc, 'syntax') and subdesc.syntax == "proto3": + new_options.proto3 = True + + # 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 +# --------------------------------------------------------------------------- + +import sys +import os.path +from optparse import OptionParser + +optparser = OptionParser( + usage = "Usage: nanopb_generator.py [options] file.pb ...", + epilog = "Compile file.pb from file.proto by: 'protoc -ofile.pb file.proto'. " + + "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("-f", "--options-file", dest="options_file", metavar="FILE", default="%s.options", + help="Set name of a separate generator options file.") +optparser.add_option("-I", "--options-path", dest="options_path", metavar="DIR", + action="append", default = [], + help="Search for .options files additionally in this path") +optparser.add_option("-D", "--output-dir", dest="output_dir", + metavar="OUTPUTDIR", default=None, + help="Output directory of .pb.h and .pb.c files") +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, + 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 parse_file(filename, fdesc, options): + '''Parse a single file. Returns a ProtoFile instance.''' + 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 + + paths = ['.'] + options.options_path + for p in paths: + if os.path.isfile(os.path.join(p, optfilename)): + optfilename = os.path.join(p, optfilename) + if options.verbose: + sys.stderr.write('Reading options from ' + optfilename + '\n') + Globals.separate_options = read_options_file(open(optfilename, "rU")) + break + else: + # 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 + '\n') + 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 = {}): + '''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. + + 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 + } + ''' + f = parse_file(filename, fdesc, options) + + # Provide dependencies if available + for dep in f.fdesc.dependency: + if dep in other_files: + f.add_dependency(other_files[dep]) + + # 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) + + # 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)) + + # 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 " + f.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() + sys.exit(1) + + if options.quiet: + options.verbose = False + + if options.output_dir and not os.path.exists(options.output_dir): + optparser.print_help() + sys.stderr.write("\noutput_dir does not exist: %s\n" % options.output_dir) + sys.exit(1) + + + Globals.verbose_options = options.verbose + for filename in filenames: + results = process_file(filename, None, options) + + base_dir = options.output_dir or '' + to_write = [ + (os.path.join(base_dir, results['headername']), results['headerdata']), + (os.path.join(base_dir, results['sourcename']), results['sourcedata']), + ] + + if not options.quiet: + paths = " and ".join([x[0] for x in to_write]) + sys.stderr.write("Writing to %s\n" % paths) + + for path, data in to_write: + with open(path, 'w') as f: + f.write(data) + +def main_plugin(): + '''Main function when invoked as a protoc plugin.''' + + import io, 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) + + 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'] + + io.open(sys.stdout.fileno(), "wb").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() |