diff options
Diffstat (limited to 'generator')
| -rw-r--r-- | generator/nanopb_generator.py | 118 |
1 files changed, 89 insertions, 29 deletions
diff --git a/generator/nanopb_generator.py b/generator/nanopb_generator.py index b182d01..6aff315 100644 --- a/generator/nanopb_generator.py +++ b/generator/nanopb_generator.py @@ -121,7 +121,7 @@ class Field: if self.max_size is None: is_callback = True else: - self.ctype = 'PB_BYTES_ARRAY(%d)' % self.max_size + self.ctype = self.struct_name + self.name + 't' elif desc.type == FieldD.TYPE_MESSAGE: self.ltype = 'PB_LTYPE_SUBMESSAGE' self.ctype = names_from_type_name(desc.type_name) @@ -146,7 +146,18 @@ class Field: result += ' %s %s%s;' % (self.ctype, self.name, self.array_decl) return result - def default_decl(self): + 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 @@ -154,7 +165,7 @@ class Field: if self.ltype == 'PB_LTYPE_STRING': ctype = 'char' if self.max_size is None: - array_decl = '[]' + return None # Not implemented else: array_decl = '[%d]' % self.max_size default = self.default.encode('string_escape') @@ -165,9 +176,9 @@ class Field: data = ['0x%02x' % ord(c) for c in data] if self.max_size is None: - ctype = 'PB_BYTES_ARRAY(%d)' % len(data) + return None # Not implemented else: - ctype = 'PB_BYTES_ARRAY(%d)' % self.max_size + ctype = self.ctype default = '{%d, {%s}}' % (len(data), ','.join(data)) array_decl = '' @@ -175,7 +186,10 @@ class Field: ctype, default = self.ctype, self.default array_decl = '' - return 'const %s %s_default%s = %s;' % (ctype, self.struct_name + self.name, array_decl, default) + 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. @@ -244,20 +258,32 @@ class Message: def __str__(self): result = 'typedef struct {\n' - result += '\n'.join([str(f) for f in self.fields]) + result += '\n'.join([str(f) for f in self.ordered_fields]) result += '\n} %s;' % self.name return result - def default_decl(self): + 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() + default = field.default_decl(declaration_only) if default is not None: result += default + '\n' return result - def pb_field_t(self): - result = 'const pb_field_t %s_fields[] = {\n' % self.name + def fields_declaration(self): + result = 'extern const pb_field_t %s_fields[%d];' % (self.name, len(self.fields)) + return result + + def fields_definition(self): + result = 'const pb_field_t %s_fields[%d] = {\n' % (self.name, len(self.fields)) prev = None for field in self.ordered_fields: @@ -282,13 +308,8 @@ def iterate_messages(desc, names = Names()): for x in iterate_messages(submsg, sub_names): yield x -def process_file(fdesc): - '''Takes a FileDescriptorProto and generate content for its header file. - Generates strings, which should be concatenated and stored to file. - ''' - - yield '/* Automatically generated nanopb header */\n' - yield '#include <pb.h>\n\n' +def parse_file(fdesc): + '''Takes a FileDescriptorProto and returns tuple (enum, messages).''' enums = [] messages = [] @@ -297,10 +318,23 @@ def process_file(fdesc): enums.append(Enum(Names(), enum)) for names, message in iterate_messages(fdesc): + messages.append(Message(names, message)) for enum in message.enum_type: enums.append(Enum(names, enum)) - - messages.append(Message(names, message)) + + return enums, messages + +def generate_header(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' + + symbol = headername.replace('.', '_').upper() + yield '#ifndef _PB_%s_\n' % symbol + yield '#define _PB_%s_\n' % symbol + yield '#include <pb.h>\n\n' yield '/* Enum definitions */\n' for enum in enums: @@ -309,17 +343,34 @@ def process_file(fdesc): yield '/* Struct definitions */\n' messages.sort() for msg in messages: + yield msg.types() yield str(msg) + '\n\n' yield '/* Default values for struct fields */\n' for msg in messages: - yield msg.default_decl() + yield msg.default_decl(True) yield '\n' yield '/* Struct field encoding specification for nanopb */\n' for msg in messages: - yield msg.pb_field_t() + '\n\n' + yield msg.fields_declaration() + '\n' + + yield '\n#endif\n' + +def generate_source(headername, enums, messages): + '''Generate content for a source file.''' + + yield '/* Automatically generated nanopb constant definitions */\n' + 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' + if __name__ == '__main__': import sys import os.path @@ -328,17 +379,26 @@ if __name__ == '__main__': print "Usage: " + sys.argv[0] + " file.pb" print "where file.pb has been compiled from .proto by:" print "protoc -ofile.pb file.proto" - print "Output fill be written to file.h" + print "Output fill be written to file.h and file.c" sys.exit(1) data = open(sys.argv[1]).read() fdesc = descriptor.FileDescriptorSet.FromString(data) + enums, messages = parse_file(fdesc.file[0]) - destfile = os.path.splitext(sys.argv[1])[0] + '.h' - - print "Writing to " + destfile + noext = os.path.splitext(sys.argv[1])[0] + headername = noext + '.h' + sourcename = noext + '.c' + headerbasename = os.path.basename(headername) - destfile = open(destfile, 'w') + print "Writing to " + headername + " and " + sourcename - for part in process_file(fdesc.file[0]): - destfile.write(part) + header = open(headername, 'w') + for part in generate_header(headerbasename, enums, messages): + header.write(part) + + source = open(sourcename, 'w') + for part in generate_source(headerbasename, enums, messages): + source.write(part) + +
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