7 from vapi_c_gen import (
14 json_to_c_header_name,
17 from vapi_json_parser import JsonParser
20 class CppField(CField):
24 class CppStruct(CStruct):
32 class CppAlias(CAlias):
36 class CppSimpleType(CSimpleType):
40 class CppStructType(CStructType, CppStruct):
44 class CppMessage(CMessage):
45 def get_swap_to_be_template_instantiation(self):
48 "template <> inline void vapi_swap_to_be<%s>(%s *msg)"
49 % (self.get_c_name(), self.get_c_name()),
51 " %s(msg);" % self.get_swap_to_be_func_name(),
56 def get_swap_to_host_template_instantiation(self):
59 "template <> inline void vapi_swap_to_host<%s>(%s *msg)"
60 % (self.get_c_name(), self.get_c_name()),
62 " %s(msg);" % self.get_swap_to_host_func_name(),
67 def get_alloc_template_instantiation(self):
70 "template <> inline %s* vapi_alloc<%s%s>"
75 ", size_t" * len(self.get_alloc_vla_param_names()),
77 [", size_t %s" % n for n in self.get_alloc_vla_param_names()]
81 " %s* result = %s(con.vapi_ctx%s);"
84 self.get_alloc_func_name(),
85 "".join([", %s" % n for n in self.get_alloc_vla_param_names()]),
87 "#if VAPI_CPP_DEBUG_LEAKS",
88 " con.on_shm_data_alloc(result);",
95 def get_cpp_name(self):
96 return "%s%s" % (self.name[0].upper(), self.name[1:])
98 def get_req_template_name(self):
99 if self.has_stream_msg:
100 return "Stream<%s, %s, %s>" % (
102 self.reply.get_c_name(),
103 self.stream_msg.get_c_name(),
106 if self.reply_is_stream:
111 return "%s<%s, %s%s>" % (
114 self.reply.get_c_name(),
115 "".join([", size_t"] * len(self.get_alloc_vla_param_names())),
118 def get_req_template_instantiation(self):
119 return "template class %s;" % self.get_req_template_name()
121 def get_type_alias(self):
122 return "using %s = %s;" % (self.get_cpp_name(), self.get_req_template_name())
124 def get_reply_template_name(self):
125 return "Msg<%s>" % (self.get_c_name())
127 def get_reply_type_alias(self):
128 return "using %s = %s;" % (self.get_cpp_name(), self.get_reply_template_name())
130 def get_msg_class_instantiation(self):
131 return "template class Msg<%s>;" % self.get_c_name()
133 def get_get_msg_id_t_instantiation(self):
137 "template <> inline vapi_msg_id_t vapi_get_msg_id_t<%s>()"
141 " return ::%s; " % self.get_msg_id_name(),
145 "template <> inline vapi_msg_id_t "
146 "vapi_get_msg_id_t<Msg<%s>>()" % self.get_c_name()
149 " return ::%s; " % self.get_msg_id_name(),
154 def get_cpp_constructor(self):
158 "static void __attribute__((constructor)) "
159 "__vapi_cpp_constructor_%s()" % self.name
163 " vapi::vapi_msg_set_msg_id<%s>(%s);"
164 % (self.get_c_name(), self.get_msg_id_name())
171 def gen_json_header(parser, logger, j, io, gen_h_prefix, add_debug_comments):
172 logger.info("Generating header `%s'" % io.name)
173 orig_stdout = sys.stdout
175 d, f = os.path.split(j)
176 include_guard = "__included_hpp_%s" % (
177 f.replace(".", "_").replace("/", "_").replace("-", "_").replace("@", "_")
179 print("#ifndef %s" % include_guard)
180 print("#define %s" % include_guard)
182 print("#include <vapi/vapi.hpp>")
183 print("#include <%s%s>" % (gen_h_prefix, json_to_c_header_name(f)))
185 print("namespace vapi {")
187 for m in parser.messages_by_json[j].values():
188 # utility functions need to go first, otherwise internal instantiation
189 # causes headaches ...
190 if add_debug_comments:
191 print("/* m.get_swap_to_be_template_instantiation() */")
192 print("%s" % m.get_swap_to_be_template_instantiation())
194 if add_debug_comments:
195 print("/* m.get_swap_to_host_template_instantiation() */")
196 print("%s" % m.get_swap_to_host_template_instantiation())
198 if add_debug_comments:
199 print("/* m.get_get_msg_id_t_instantiation() */")
200 print("%s" % m.get_get_msg_id_t_instantiation())
202 if add_debug_comments:
203 print("/* m.get_cpp_constructor() */")
204 print("%s" % m.get_cpp_constructor())
206 if not m.is_reply and not m.is_event and not m.is_stream:
207 if add_debug_comments:
208 print("/* m.get_alloc_template_instantiation() */")
209 print("%s" % m.get_alloc_template_instantiation())
211 if add_debug_comments:
212 print("/* m.get_msg_class_instantiation() */")
213 print("%s" % m.get_msg_class_instantiation())
215 if m.is_reply or m.is_event:
216 if add_debug_comments:
217 print("/* m.get_reply_type_alias() */")
218 print("%s" % m.get_reply_type_alias())
222 if add_debug_comments:
223 print("/* m.get_req_template_instantiation() */")
224 print("%s" % m.get_req_template_instantiation())
226 if add_debug_comments:
227 print("/* m.get_type_alias() */")
228 print("%s" % m.get_type_alias())
230 print("}") # namespace vapi
233 sys.stdout = orig_stdout
236 def json_to_cpp_header_name(json_name):
237 if json_name.endswith(".json"):
238 return "%s.vapi.hpp" % os.path.splitext(json_name)[0]
239 raise Exception("Unexpected json name `%s'!" % json_name)
243 parser, logger, prefix, gen_h_prefix, remove_path, add_debug_comments=False
245 if prefix == "" or prefix is None:
248 prefix = "%s/" % prefix
249 if gen_h_prefix is None:
252 gen_h_prefix = "%s/" % gen_h_prefix
253 for j in parser.json_files:
255 d, f = os.path.split(j)
258 with open("%s%s" % (prefix, json_to_cpp_header_name(f)), "w") as io:
259 gen_json_header(parser, logger, j, io, gen_h_prefix, add_debug_comments)
262 if __name__ == "__main__":
264 verbose = int(os.getenv("V", 0))
275 logging.basicConfig(stream=sys.stdout, level=log_level)
276 logger = logging.getLogger("VAPI CPP GEN")
277 logger.setLevel(log_level)
279 argparser = argparse.ArgumentParser(description="VPP C++ API generator")
280 argparser.add_argument(
285 help="json api file" "(may be specified multiple times)",
287 argparser.add_argument("--prefix", action="store", default=None, help="path prefix")
288 argparser.add_argument(
289 "--gen-h-prefix", action="store", default=None, help="generated C header prefix"
291 argparser.add_argument(
292 "--remove-path", action="store_true", help="remove path from filename"
294 args = argparser.parse_args()
296 jsonparser = JsonParser(
299 simple_type_class=CppSimpleType,
300 struct_type_class=CppStructType,
301 field_class=CppField,
303 message_class=CppMessage,
304 alias_class=CppAlias,
308 jsonparser, logger, args.prefix, args.gen_h_prefix, args.remove_path
311 for e in jsonparser.exceptions: