--- /dev/null
+#!/usr/bin/env python3
+
+import argparse
+import os
+import sys
+import logging
+from vapi_c_gen import CField, CStruct, CSimpleType, CStructType, CMessage, \
+ json_to_c_header_name
+from vapi_json_parser import JsonParser
+
+
+class CppField(CField):
+ def __init__(
+ self,
+ field_name,
+ field_type,
+ array_len=None,
+ nelem_field=None):
+ super().__init__(field_name, field_type, array_len, nelem_field)
+
+
+class CppStruct(CStruct):
+ def __init__(self, name, fields):
+ super().__init__(name, fields)
+
+
+class CppSimpleType (CSimpleType):
+
+ def __init__(self, name):
+ super().__init__(name)
+
+
+class CppStructType (CStructType, CppStruct):
+ def __init__(self, definition, typedict, field_class):
+ super().__init__(definition, typedict, field_class)
+
+
+class CppMessage (CMessage):
+ def __init__(self, logger, definition, typedict,
+ struct_type_class, simple_type_class, field_class):
+ super().__init__(logger, definition, typedict, struct_type_class,
+ simple_type_class, field_class)
+
+ def get_swap_to_be_template_instantiation(self):
+ return "\n".join([
+ "template <> inline void vapi_swap_to_be<%s>(%s *msg)" %
+ (self.get_c_name(), self.get_c_name()),
+ "{",
+ " %s(msg);" % self.get_swap_to_be_func_name(),
+ "}",
+ ])
+
+ def get_swap_to_host_template_instantiation(self):
+ return "\n".join([
+ "template <> inline void vapi_swap_to_host<%s>(%s *msg)" %
+ (self.get_c_name(), self.get_c_name()),
+ "{",
+ " %s(msg);" % self.get_swap_to_host_func_name(),
+ "}",
+ ])
+
+ def get_alloc_template_instantiation(self):
+ return "\n".join([
+ "template <> inline %s* vapi_alloc<%s%s>"
+ "(Connection &con%s)" %
+ (self.get_c_name(), self.get_c_name(),
+ ", size_t" * len(self.get_alloc_vla_param_names()),
+ "".join([", size_t %s" % n for n in
+ self.get_alloc_vla_param_names()])
+ ),
+ "{",
+ " %s* result = %s(con.vapi_ctx%s);" %
+ (self.get_c_name(), self.get_alloc_func_name(),
+ "".join([", %s" % n
+ for n in self.get_alloc_vla_param_names()])),
+ "#if VAPI_CPP_DEBUG_LEAKS",
+ " con.on_shm_data_alloc(result);",
+ "#endif",
+ " return result;",
+ "}",
+ ])
+
+ def get_cpp_name(self):
+ return "%s%s" % (self.name[0].upper(), self.name[1:])
+
+ def get_req_template_name(self):
+ if self.is_dump():
+ template = "Dump"
+ else:
+ template = "Request"
+
+ return "%s<%s, %s%s>" % (
+ template,
+ self.get_c_name(),
+ self.reply.get_c_name(),
+ "".join([", size_t"] * len(self.get_alloc_vla_param_names()))
+ )
+
+ def get_req_template_instantiation(self):
+ return "template class %s;" % self.get_req_template_name()
+
+ def get_type_alias(self):
+ return "using %s = %s;" % (
+ self.get_cpp_name(), self.get_req_template_name())
+
+ def get_reply_template_name(self):
+ return "Msg<%s>" % (self.get_c_name())
+
+ def get_reply_type_alias(self):
+ return "using %s = %s;" % (
+ self.get_cpp_name(), self.get_reply_template_name())
+
+ def get_msg_class_instantiation(self):
+ return "template class Msg<%s>;" % self.get_c_name()
+
+ def get_get_msg_id_t_instantiation(self):
+ return "\n".join([
+ ("template <> inline vapi_msg_id_t vapi_get_msg_id_t<%s>()"
+ % self.get_c_name()),
+ "{",
+ " return ::%s; " % self.get_msg_id_name(),
+ "}",
+ "",
+ ("template <> inline vapi_msg_id_t "
+ "vapi_get_msg_id_t<Msg<%s>>()" % self.get_c_name()),
+ "{",
+ " return ::%s; " % self.get_msg_id_name(),
+ "}",
+ ])
+
+ def get_cpp_constructor(self):
+ return '\n'.join([
+ ('static void __attribute__((constructor)) '
+ '__vapi_cpp_constructor_%s()'
+ % self.name),
+ '{',
+ (' vapi::vapi_msg_set_msg_id<%s>(%s);' % (
+ self.get_c_name(), self.get_msg_id_name())),
+ '}',
+ ])
+
+
+def gen_json_header(parser, logger, j, io, gen_h_prefix, add_debug_comments):
+ logger.info("Generating header `%s'" % io.name)
+ orig_stdout = sys.stdout
+ sys.stdout = io
+ include_guard = "__included_hpp_%s" % (
+ j.replace(".", "_").replace("/", "_").replace("-", "_"))
+ print("#ifndef %s" % include_guard)
+ print("#define %s" % include_guard)
+ print("")
+ print("#include <vapi/vapi.hpp>")
+ print("#include <%s%s>" % (gen_h_prefix, json_to_c_header_name(j)))
+ print("")
+ print("namespace vapi {")
+ print("")
+ for m in parser.messages_by_json[j].values():
+ # utility functions need to go first, otherwise internal instantiation
+ # causes headaches ...
+ if add_debug_comments:
+ print("/* m.get_swap_to_be_template_instantiation() */")
+ print("%s" % m.get_swap_to_be_template_instantiation())
+ print("")
+ if add_debug_comments:
+ print("/* m.get_swap_to_host_template_instantiation() */")
+ print("%s" % m.get_swap_to_host_template_instantiation())
+ print("")
+ if add_debug_comments:
+ print("/* m.get_get_msg_id_t_instantiation() */")
+ print("%s" % m.get_get_msg_id_t_instantiation())
+ print("")
+ if add_debug_comments:
+ print("/* m.get_cpp_constructor() */")
+ print("%s" % m.get_cpp_constructor())
+ print("")
+ if not m.is_reply():
+ if add_debug_comments:
+ print("/* m.get_alloc_template_instantiation() */")
+ print("%s" % m.get_alloc_template_instantiation())
+ print("")
+ if add_debug_comments:
+ print("/* m.get_msg_class_instantiation() */")
+ print("%s" % m.get_msg_class_instantiation())
+ print("")
+ if m.is_reply():
+ if add_debug_comments:
+ print("/* m.get_reply_type_alias() */")
+ print("%s" % m.get_reply_type_alias())
+ continue
+ if add_debug_comments:
+ print("/* m.get_req_template_instantiation() */")
+ print("%s" % m.get_req_template_instantiation())
+ print("")
+ if add_debug_comments:
+ print("/* m.get_type_alias() */")
+ print("%s" % m.get_type_alias())
+ print("")
+ print("}") # namespace vapi
+
+ print("#endif")
+ sys.stdout = orig_stdout
+
+
+def json_to_cpp_header_name(json_name):
+ if json_name.endswith(".json"):
+ return "%s.vapi.hpp" % os.path.splitext(json_name)[0]
+ raise Exception("Unexpected json name `%s'!" % json_name)
+
+
+def gen_cpp_headers(parser, logger, prefix, gen_h_prefix,
+ add_debug_comments=False):
+ if prefix == "" or prefix is None:
+ prefix = ""
+ else:
+ prefix = "%s/" % prefix
+ if gen_h_prefix is None:
+ gen_h_prefix = ""
+ else:
+ gen_h_prefix = "%s/" % gen_h_prefix
+ for j in parser.json_files:
+ with open('%s%s' % (prefix, json_to_cpp_header_name(j)), "w") as io:
+ gen_json_header(parser, logger, j, io,
+ gen_h_prefix, add_debug_comments)
+
+
+if __name__ == '__main__':
+ try:
+ verbose = int(os.getenv("V", 0))
+ except:
+ verbose = 0
+
+ if verbose >= 2:
+ log_level = 10
+ elif verbose == 1:
+ log_level = 20
+ else:
+ log_level = 40
+
+ logging.basicConfig(stream=sys.stdout, level=log_level)
+ logger = logging.getLogger("VAPI CPP GEN")
+ logger.setLevel(log_level)
+
+ argparser = argparse.ArgumentParser(description="VPP C++ API generator")
+ argparser.add_argument('files', metavar='api-file', action='append',
+ type=str, help='json api file'
+ '(may be specified multiple times)')
+ argparser.add_argument('--prefix', action='store', default=None,
+ help='path prefix')
+ argparser.add_argument('--gen-h-prefix', action='store', default=None,
+ help='generated C header prefix')
+ args = argparser.parse_args()
+
+ jsonparser = JsonParser(logger, args.files,
+ simple_type_class=CppSimpleType,
+ struct_type_class=CppStructType,
+ field_class=CppField,
+ message_class=CppMessage)
+
+ gen_cpp_headers(jsonparser, logger, args.prefix, args.gen_h_prefix)
+
+ for e in jsonparser.exceptions:
+ logger.error(e)
Code Review / vpp.git / blobdiff