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<#!/usr/bin/env python3
#
# Copyright (C) 2018 Wind River Systems, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import os
import sys
import argparse
import logging
import re
class Dot(object):
def __init__(self):
parser = argparse.ArgumentParser(
description="Analyse recipe-depends.dot generated by bitbake -g",
epilog="Use %(prog)s --help to get help")
parser.add_argument("dotfile",
help = "Specify the dotfile", nargs = 1, action='store', default='')
parser.add_argument("-k", "--key",
help = "Specify the key, e.g., recipe name",
action="store", default='')
parser.add_argument("-d", "--depends",
help = "Print the key's dependencies",
action="store_true", default=False)
parser.add_argument("-w", "--why",
help = "Print why the key is built",
action="store_true", default=False)
parser.add_argument("-r", "--remove",
help = "Remove duplicated dependencies to reduce the size of the dot files."
" For example, A->B, B->C, A->C, then A->C can be removed.",
action="store_true", default=False)
self.args =
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}
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
}
'''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.'''
nanopb_version = "nanopb-0.1.9-dev"
try:
import google.protobuf.descriptor_pb2 as descriptor
except:
print
print "*************************************************************"
print "*** Could not import the Google protobuf Python libraries ***"
print "*** Try installing package 'python-protobuf' or similar. ***"
print "*************************************************************"
print
raise
try:
import nanopb_pb2
except:
print
print "***************************************************************"
print "*** Could not import the precompiled nanopb_pb2.py. ***"
print "*** Run 'make' in the 'generator' folder to update the file.***"
print "***************************************************************"
print
raise
# ---------------------------------------------------------------------------
# Generation of single fields
# ---------------------------------------------------------------------------
import time
import os.path
# Values are tuple (c type, pb ltype)
FieldD = descriptor.FieldDescriptorProto
datatypes = {
FieldD.TYPE_BOOL: ('bool', 'PB_LTYPE_VARINT'),
FieldD.TYPE_DOUBLE: ('double', 'PB_LTYPE_FIXED64'),
FieldD.TYPE_FIXED32: ('uint32_t', 'PB_LTYPE_FIXED32'),
FieldD.TYPE_FIXED64: ('uint64_t', 'PB_LTYPE_FIXED64'),
FieldD.TYPE_FLOAT: ('float', 'PB_LTYPE_FIXED32'),
FieldD.TYPE_INT32: ('int32_t', 'PB_LTYPE_VARINT'),
FieldD.TYPE_INT64: ('int64_t', 'PB_LTYPE_VARINT'),
FieldD.TYPE_SFIXED32: ('int32_t', 'PB_LTYPE_FIXED32'),
FieldD.TYPE_SFIXED64: ('int64_t', 'PB_LTYPE_FIXED64'),
FieldD.TYPE_SINT32: ('int32_t', 'PB_LTYPE_SVARINT'),
FieldD.TYPE_SINT64: ('int64_t', 'PB_LTYPE_SVARINT'),
FieldD.TYPE_UINT32: ('uint32_t', 'PB_LTYPE_VARINT'),
FieldD.TYPE_UINT64: ('uint64_t', 'PB_LTYPE_VARINT')
}
class Names:
'''Keeps a set of nested names and formats them to C identifier.
You can subclass this with your own implementation.
'''
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, (str, unicode)):
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('.'))
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]
def __str__(self):
result = 'typedef enum _%s {\n' % self.names
result += ',\n'.join([" %s = %d" % x for x in self.values])
result += '\n} %s;' % self.names
return result
class Field:
def __init__(self, struct_name, desc, field_options):
'''desc is FieldDescriptorProto'''
self.tag = desc.number
self.struct_name = struct_name
self.name = desc.name
self.default = None
self.max_size = None
self.max_count = None
self.array_decl = ""
# Parse field options
if field_options.HasField("max_size"):
self.max_size = field_options.max_size
if field_options.HasField("max_count"):
self.max_count = field_options.max_count
if desc.HasField('default_value'):
self.default = desc.default_value
# Decide HTYPE
# HTYPE is the high-order nibble of nanopb field description,
# defining whether value is required/optional/repeated.
can_be_static = True
if desc.label == FieldD.LABEL_REQUIRED:
self.htype = 'PB_HTYPE_REQUIRED'
elif desc.label == FieldD.LABEL_OPTIONAL:
self.htype = 'PB_HTYPE_OPTIONAL'
elif desc.label == FieldD.LABEL_REPEATED:
if self.max_count is None:
can_be_static = False
else:
self.htype = 'PB_HTYPE_ARRAY'
self.array_decl = '[%d]' % self.max_count
else:
raise NotImplementedError(desc.label)
# Decide LTYPE and CTYPE
# LTYPE is the low-order nibble of nanopb field description,
# defining how to decode an individual value.
# CTYPE is the name of the c type to use in the struct.
if datatypes.has_key(desc.type):
self.ctype, self.ltype = datatypes[desc.type]
elif desc.type == FieldD.TYPE_ENUM:
self.ltype = 'PB_LTYPE_VARINT'
self.ctype = names_from_type_name(desc.type_name)
if self.default is not None:
self.default = self.ctype + self.default
elif desc.type == FieldD.TYPE_STRING:
self.ltype = 'PB_LTYPE_STRING'
if self.max_size is None:
can_be_static = False
else:
self.ctype = 'char'
self.array_decl += '[%d]' % self.max_size
elif desc.type == FieldD.TYPE_BYTES:
self.ltype = 'PB_LTYPE_BYTES'
if self.max_size is None:
can_be_static = False
else:
self.ctype = self.struct_name + self.name + 't'
elif desc.type == FieldD.TYPE_MESSAGE:
self.ltype = 'PB_LTYPE_SUBMESSAGE'
self.ctype = self.submsgname = names_from_type_name(desc.type_name)
else:
raise NotImplementedError(desc.type)
if field_options.type == nanopb_pb2.FT_DEFAULT:
if can_be_static:
field_options.type = nanopb_pb2.FT_STATIC
else:
field_options.type = nanopb_pb2.FT_CALLBACK
if field_options.type == nanopb_pb2.FT_STATIC and not can_be_static:
raise Exception("Field %s is defined as static, but max_size or max_count is not given." % self.name)
if field_options.type == nanopb_pb2.FT_CALLBACK:
self.htype = 'PB_HTYPE_CALLBACK'
self.ctype = 'pb_callback_t'
self.array_decl = ''
def __cmp__(self, other):
return cmp(self.tag, other.tag)
def __str__(self):
if self.htype == 'PB_HTYPE_OPTIONAL':
result = ' bool has_' + self.name + ';\n'
elif self.htype == 'PB_HTYPE_ARRAY':
result = ' size_t ' + self.name + '_count;\n'
else:
result = ''
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.ltype == 'PB_LTYPE_BYTES' and self.max_size is not None:
result = 'typedef struct {\n'
result += ' size_t size;\n'
result += ' uint8_t bytes[%d];\n' % self.max_size
result += '} %s;\n' % self.ctype
else:
result = None
return result
def default_decl(self, declaration_only = False):
'''Return definition for this field's default value.'''
if self.default is None:
return None
if self.ltype == 'PB_LTYPE_STRING':
ctype = 'char'
if self.max_size is None:
return None # Not implemented
else:
array_decl = '[%d]' % (self.max_size + 1)
default = str(self.default).encode('string_escape')
default = default.replace('"', '\\"')
default = '"' + default + '"'
elif self.ltype == 'PB_LTYPE_BYTES':
data = self.default.decode('string_escape')
data = ['0x%02x' % ord(c) for c in data]
if self.max_size is None:
return None # Not implemented
else:
ctype = self.ctype
default = '{%d, {%s}}' % (len(data), ','.join(data))
array_decl = ''
else:
ctype, default = self.ctype, self.default
array_decl = ''
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 pb_field_t(self, prev_field_name):
'''Return the pb_field_t initializer to use in the constant array.
prev_field_name is the name of the previous field or None.
'''
result = ' {%d, ' % self.tag
result += '(pb_type_t) ((int) ' + self.htype
if self.ltype is not None:
result += ' | (int) ' + self.ltype
result += '),\n'
if prev_field_name is None:
result += ' offsetof(%s, %s),' % (self.struct_name, self.name)
else:
result += ' pb_delta_end(%s, %s, %s),' % (self.struct_name, self.name, prev_field_name)
if self.htype == 'PB_HTYPE_OPTIONAL':
result += '\n pb_delta(%s, has_%s, %s),' % (self.struct_name, self.name, self.name)
elif self.htype == 'PB_HTYPE_ARRAY':
result += '\n pb_delta(%s, %s_count, %s),' % (self.struct_name, self.name, self.name)
else:
result += ' 0,'
if self.htype == 'PB_HTYPE_ARRAY':
result += '\n pb_membersize(%s, %s[0]),' % (self.struct_name, self.name)
result += ('\n pb_membersize(%s, %s) / pb_membersize(%s, %s[0]),'
% (self.struct_name, self.name, self.struct_name, self.name))
else:
result += '\n pb_membersize(%s, %s),' % (self.struct_name, self.name)
result += ' 0,'
if self.ltype == 'PB_LTYPE_SUBMESSAGE':
result += '\n &%s_fields}' % self.submsgname
elif self.default is None or self.htype == 'PB_HTYPE_CALLBACK':
result += ' 0}'
else:
result += '\n &%s_default}' % (self.struct_name + self.name)
return result
def largest_field_value(self):
'''Determine if this field needs 16bit or 32bit pb_field_t structure to compile properly.
Returns numeric value or a C-expression for assert.'''
if self.ltype == 'PB_LTYPE_SUBMESSAGE':
if self.htype == 'PB_HTYPE_ARRAY':
return 'pb_membersize(%s, %s[0])' % (self.struct_name, self.name)
else:
return 'pb_membersize(%s, %s)' % (self.struct_name, self.name)
return max(self.tag, self.max_size, self.max_count)
# ---------------------------------------------------------------------------
# Generation of messages (structures)
# ---------------------------------------------------------------------------
class Message:
def __init__(self, names, desc, message_options):
self.name = names
self.fields = []
for f in desc.field:
field_options = get_nanopb_suboptions(f, message_options)
if field_options.type != nanopb_pb2.FT_IGNORE:
self.fields.append(Field(self.name, f, 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.'''
return [str(field.ctype) for field in self.fields]
def __str__(self):
result = 'typedef struct _%s {\n' % self.name
result += '\n'.join([str(f) for f in self.ordered_fields])
result += '\n}'
if self.packed:
result += ' pb_packed'
result += ' %s;' % self.name
return result
def types(self):
result = ""
for field in self.fields:
types = field.types()
if types is not None:
result += types + '\n'
return result
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 fields_declaration(self):
result = 'extern const pb_field_t %s_fields[%d];' % (self.name, len(self.fields) + 1)
return result
def fields_definition(self):
result = 'const pb_field_t %s_fields[%d] = {\n' % (self.name, len(self.fields) + 1)
prev = None
for field in self.ordered_fields:
result += field.pb_field_t(prev)
result += ',\n\n'
prev = field.name
result += ' PB_LAST_FIELD\n};'
return result
# ---------------------------------------------------------------------------
# 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 parse_file(fdesc, file_options):
'''Takes a FileDescriptorProto and returns tuple (enum, messages).'''
enums = []
messages = []
if fdesc.package:
base_name = Names(fdesc.package.split('.'))
else:
base_name = Names()
for enum in fdesc.enum_type:
enum_options = get_nanopb_suboptions(enum, file_options)
enums.append(Enum(base_name, enum, enum_options))
for names, message in iterate_messages(fdesc, base_name):
message_options = get_nanopb_suboptions(message, file_options)
messages.append(Message(names, message, message_options))
for enum in message.enum_type:
enum_options = get_nanopb_suboptions(enum, message_options)
enums.append(Enum(names, enum, enum_options))
# Fix field default values where enum short names are used.
for enum in enums:
if not enum.options.long_names:
for message in 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]
return enums, messages
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 data.items():
v.discard(k) # Ignore self dependencies
extra_items_in_deps = reduce(set.union, 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 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 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 generate_header(dependencies, headername, enums, messages):
'''Generate content for a header file.
Generates strings, which should be concatenated and stored to file.
'''
yield '/* Automatically generated nanopb header */\n'
yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime())
symbol = headername.replace('.', '_').upper()
yield '#ifndef _PB_%s_\n' % symbol
yield '#define _PB_%s_\n' % symbol
yield '#include <pb.h>\n\n'
for dependency in dependencies:
noext = os.path.splitext(dependency)[0]
yield '#include "%s.pb.h"\n' % noext
yield '#ifdef __cplusplus\n'
yield 'extern "C" {\n'
yield '#endif\n\n'
yield '/* Enum definitions */\n'
for enum in enums:
yield str(enum) + '\n\n'
yield '/* Struct definitions */\n'
for msg in sort_dependencies(messages):
yield msg.types()
yield str(msg) + '\n\n'
yield '/* Default values for struct fields */\n'
for msg in messages:
yield msg.default_decl(True)
yield '\n'
yield '/* Struct field encoding specification for nanopb */\n'
for msg in messages:
yield msg.fields_declaration() + '\n'
if messages:
count_required_fields = lambda m: len([f for f in msg.fields if f.htype == 'PB_HTYPE_REQUIRED'])
largest_msg = max(messages, key = count_required_fields)
largest_count = count_required_fields(largest_msg)
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'
worst = 0
worst_field = ''
checks = []
checks_msgnames = []
for msg in messages:
checks_msgnames.append(msg.name)
for field in msg.fields:
status = field.largest_field_value()
if isinstance(status, (str, unicode)):
checks.append(status)
elif status > worst:
worst = status
worst_field = str(field.struct_name) + '.' + str(field.name)
if worst > 255 or checks:
yield '\n/* Check that field information fits in pb_field_t */\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 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs)
yield '#endif\n\n'
if worst > 65535 or checks:
yield '#if !defined(PB_FIELD_32BIT)\n'
if worst > 65535:
yield '#error Field descriptor for %s is too large. Define PB_FIELD_32BIT to fix this.\n' % worst_field
else:
assertion = ' && '.join(str(c) + ' < 65536' for c in checks)
msgs = '_'.join(str(n) for n in checks_msgnames)
yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_%s)\n'%(assertion,msgs)
yield '#endif\n'
yield '\n#ifdef __cplusplus\n'
yield '} /* extern "C" */\n'
yield '#endif\n'
# End of header
yield '\n#endif\n'
def generate_source(headername, enums, messages):
'''Generate content for a source file.'''
yield '/* Automatically generated nanopb constant definitions */\n'
yield '/* Generated by %s at %s. */\n\n' % (nanopb_version, time.asctime())
yield '#include "%s"\n\n' % headername
for msg in messages:
yield msg.default_decl(False)
yield '\n\n'
for msg in messages:
yield msg.fields_definition() + '\n\n'
# ---------------------------------------------------------------------------
# Command line interface
# ---------------------------------------------------------------------------
import sys
import os.path
from optparse import OptionParser
import google.protobuf.text_format as text_format
optparser = OptionParser(
usage = "Usage: nanopb_generator.py [options] file.pb ...",
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("-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 get_nanopb_suboptions(subdesc, options):
'''Get copy of options, and merge information from subdesc.'''
new_options = nanopb_pb2.NanoPBOptions()
new_options.CopyFrom(options)
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)
return new_options
def process(filenames, options):
'''Process the files given on the command line.'''
if not filenames:
optparser.print_help()
return False
if options.quiet:
options.verbose = False
toplevel_options = nanopb_pb2.NanoPBOptions()
for s in options.settings:
text_format.Merge(s, toplevel_options)
for filename in filenames:
data = open(filename, 'rb').read()
fdesc = descriptor.FileDescriptorSet.FromString(data)
file_options = get_nanopb_suboptions(fdesc.file[0], toplevel_options)
if options.verbose:
print "Options for " + filename + ":"
print text_format.MessageToString(file_options)
enums, messages = parse_file(fdesc.file[0], file_options)
noext = os.path.splitext(filename)[0]
headername = noext + '.pb.h'
sourcename = noext + '.pb.c'
headerbasename = os.path.basename(headername)
if not options.quiet:
print "Writing to " + headername + " and " + sourcename
# List of .proto files that should not be included in the C header file
# even if they are mentioned in the source .proto.
excludes = ['nanopb.proto', 'google/protobuf/descriptor.proto'] + options.exclude
dependencies = [d for d in fdesc.file[0].dependency if d not in excludes]
header = open(headername, 'w')
for part in generate_header(dependencies, headerbasename, enums, messages):
header.write(part)
source = open(sourcename, 'w')
for part in generate_source(headerbasename, enums, messages):
source.write(part)
return True
if __name__ == '__main__':
options, filenames = optparser.parse_args()
status = process(filenames, options)
if not status:
sys.exit(1)
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