X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=generator%2Fnanopb_generator.py;h=5ef4ab7a7fbaafb0710b8f44bf10ceaa285e1a67;hb=1396dce2aeeaea9f15ca5f495718bc85aeda8bd8;hp=e38d38226360f8a4abe244001a2acbbac20871a4;hpb=104710b26c1c4c6aaeb71141dcf1e72e5016b046;p=apps%2Fagl-service-can-low-level.git diff --git a/generator/nanopb_generator.py b/generator/nanopb_generator.py index e38d3822..5ef4ab7a 100644 --- a/generator/nanopb_generator.py +++ b/generator/nanopb_generator.py @@ -3,6 +3,7 @@ nanopb_version = "nanopb-0.2.1-dev" try: import google.protobuf.descriptor_pb2 as descriptor + import google.protobuf.text_format as text_format except: print print "*************************************************************" @@ -54,9 +55,7 @@ datatypes = { } class Names: - '''Keeps a set of nested names and formats them to C identifier. - You can subclass this with your own implementation. - ''' + '''Keeps a set of nested names and formats them to C identifier.''' def __init__(self, parts = ()): if isinstance(parts, Names): parts = parts.parts @@ -286,7 +285,7 @@ class Message: self.fields = [] for f in desc.field: - field_options = get_nanopb_suboptions(f, message_options) + field_options = get_nanopb_suboptions(f, message_options, self.name + f.name) if field_options.type != nanopb_pb2.FT_IGNORE: self.fields.append(Field(self.name, f, field_options)) @@ -300,6 +299,12 @@ class Message: 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 += ' uint8_t dummy_field;' + result += '\n'.join([str(f) for f in self.ordered_fields]) result += '\n}' @@ -307,6 +312,11 @@ class Message: result += ' pb_packed' result += ' %s;' % self.name + + if self.packed: + result = 'PB_PACKED_STRUCT_START\n' + result + result += '\nPB_PACKED_STRUCT_END' + return result def types(self): @@ -377,14 +387,14 @@ def parse_file(fdesc, file_options): base_name = Names() for enum in fdesc.enum_type: - enum_options = get_nanopb_suboptions(enum, file_options) + enum_options = get_nanopb_suboptions(enum, file_options, base_name + enum.name) enums.append(Enum(base_name, enum, enum_options)) for names, message in iterate_messages(fdesc, base_name): - message_options = get_nanopb_suboptions(message, file_options) + message_options = get_nanopb_suboptions(message, file_options, names) messages.append(Message(names, message, message_options)) for enum in message.enum_type: - enum_options = get_nanopb_suboptions(enum, message_options) + enum_options = get_nanopb_suboptions(enum, message_options, names + enum.name) enums.append(Enum(names, enum, enum_options)) # Fix field default values where enum short names are used. @@ -450,12 +460,18 @@ def generate_header(dependencies, headername, enums, messages, options): symbol = make_identifier(headername) yield '#ifndef _PB_%s_\n' % symbol yield '#define _PB_%s_\n' % symbol - yield '#include \n\n' + try: + yield options.libformat % ('pb.h') + except TypeError: + # no %s specified - use whatever was passed in as options.libformat + yield options.libformat + yield '\n' for dependency in dependencies: noext = os.path.splitext(dependency)[0] - yield '#include "%s.%s.h"\n' % (noext,options.extension) - + yield options.genformat % (noext + '.' + options.extension + '.h') + yield '\n' + yield '#ifdef __cplusplus\n' yield 'extern "C" {\n' yield '#endif\n\n' @@ -490,7 +506,8 @@ def generate_source(headername, enums, messages): 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 + yield options.genformat % (headername) + yield '\n' for msg in messages: yield msg.default_decl(False) @@ -566,36 +583,46 @@ def generate_source(headername, enums, messages): yield '\n' - # --------------------------------------------------------------------------- -# Command line interface +# Options parsing for the .proto files # --------------------------------------------------------------------------- -import sys -import os.path -from optparse import OptionParser -import google.protobuf.text_format as text_format +from fnmatch import fnmatch -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="use extension instead of 'pb' for generated files.") -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 read_options_file(infile): + '''Parse a separate options file to list: + [(namemask, options), ...] + ''' + results = [] + for line in infile: + line = line.strip() + if not line or line.startswith('//') or line.startswith('#'): + continue + + parts = line.split(None, 1) + opts = nanopb_pb2.NanoPBOptions() + text_format.Merge(parts[1], opts) + results.append((parts[0], opts)) -def get_nanopb_suboptions(subdesc, options): + return results + +class Globals: + '''Ugly global variables, should find a good way to pass these.''' + verbose_options = False + separate_options = [] + +def get_nanopb_suboptions(subdesc, options, name): '''Get copy of options, and merge information from subdesc.''' new_options = nanopb_pb2.NanoPBOptions() new_options.CopyFrom(options) + # Handle options defined in a separate file + dotname = '.'.join(name.parts) + for namemask, options in Globals.separate_options: + if fnmatch(dotname, namemask): + 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): @@ -611,8 +638,44 @@ def get_nanopb_suboptions(subdesc, options): ext = subdesc.options.Extensions[ext_type] new_options.MergeFrom(ext) + if Globals.verbose_options: + print "Options for " + dotname + ":" + print text_format.MessageToString(new_options) + 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("-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("-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 process(filenames, options): '''Process the files given on the command line.''' @@ -622,6 +685,8 @@ def process(filenames, options): if options.quiet: options.verbose = False + + Globals.verbose_options = options.verbose toplevel_options = nanopb_pb2.NanoPBOptions() for s in options.settings: @@ -631,12 +696,23 @@ def process(filenames, options): data = open(filename, 'rb').read() fdesc = descriptor.FileDescriptorSet.FromString(data) - file_options = get_nanopb_suboptions(fdesc.file[0], toplevel_options) + # Check if any separate options are specified + try: + optfilename = options.options_file % os.path.splitext(filename)[0] + except TypeError: + # No %s specified, use the filename as-is + optfilename = options.options_file if options.verbose: - print "Options for " + filename + ":" - print text_format.MessageToString(file_options) + print 'Reading options from ' + optfilename + + if os.path.isfile(optfilename): + Globals.separate_options = read_options_file(open(optfilename, "rU")) + else: + Globals.separate_options = [] + # Parse the file + file_options = get_nanopb_suboptions(fdesc.file[0], toplevel_options, Names([filename])) enums, messages = parse_file(fdesc.file[0], file_options) noext = os.path.splitext(filename)[0]