--- /dev/null
+#!/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()
Code Review / apps / agl-service-can-low-level.git / blobdiff