3 # Copyright (c) 2018 Cisco and/or its affiliates.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at:
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
16 from string import Template
18 from jni_common_gen import generate_j2c_swap, generate_j2c_identifiers, generate_c2j_swap
19 from jvpp_model import Class, Enum
22 def generate_type_handlers(model, logger):
24 Generates host-to-net and net-to-host functions for all custom types defined in the VPP API
25 :param model: meta-model of VPP API used for jVPP generation.
26 :param logger: jVPP logger
30 #TODO(VPP-1186): move the logic to JNI generators
31 if isinstance(t, Class):
32 _generate_class(model, t, type_handlers)
33 elif isinstance(t, Enum):
34 _generate_enum(model, t, type_handlers)
36 logger.debug("Skipping custom JNI type handler generation for %s", t)
38 return "\n".join(type_handlers)
41 def _generate_class(model, t, type_handlers):
42 ref_name = t.java_name_lower
43 jni_identifiers = generate_j2c_identifiers(t, class_ref_name="%sClass" % ref_name, object_ref_name="_host")
44 type_handlers.append(_TYPE_NET_TO_HOST_TEMPLATE.substitute(
46 json_filename=model.json_api_files,
47 json_definition=t.doc,
48 type_reference_name=ref_name,
50 jni_identifiers=jni_identifiers,
51 type_swap=generate_j2c_swap(t, struct_ref_name="_net")
54 type_handlers.append(_TYPE_HOST_TO_NET_TEMPLATE.substitute(
56 json_filename=model.json_api_files,
57 json_definition=t.doc,
58 type_reference_name=ref_name,
60 jni_identifiers=jni_identifiers,
61 type_swap=generate_c2j_swap(t, object_ref_name="_host", struct_ref_name="_net")
64 _TYPE_NET_TO_HOST_TEMPLATE = Template("""
66 * Host to network byte order conversion for ${c_name} type.
67 * Generated based on $json_filename:
70 static inline void _host_to_net_${c_name}(JNIEnv * env, jobject _host, vl_api_${c_name}_t * _net)
72 jclass ${type_reference_name}Class = (*env)->FindClass(env, "${class_FQN}");
77 _TYPE_HOST_TO_NET_TEMPLATE = Template("""
79 * Network to host byte order conversion for ${c_name} type.
80 * Generated based on $json_filename:
83 static inline void _net_to_host_${c_name}(JNIEnv * env, vl_api_${c_name}_t * _net, jobject _host)
85 jclass ${type_reference_name}Class = (*env)->FindClass(env, "${class_FQN}");
90 def _generate_enum(model, t, type_handlers):
91 value_type = t.value.type
92 type_handlers.append(_ENUM_NET_TO_HOST_TEMPLATE.substitute(
94 json_filename=model.json_api_files,
95 json_definition=t.doc,
97 jni_signature=value_type.jni_signature,
98 jni_type=value_type.jni_type,
99 jni_accessor=value_type.jni_accessor,
100 swap=_generate_scalar_host_to_net_swap(t.value)
103 type_handlers.append(_ENUM_HOST_TO_NET_TEMPLATE.substitute(
105 json_filename=model.json_api_files,
106 json_definition=t.doc,
107 class_FQN=t.jni_name,
108 jni_type=value_type.jni_type,
109 type_swap=_generate_scalar_net_to_host_swap(t.value)
112 _ENUM_NET_TO_HOST_TEMPLATE = Template("""
114 * Host to network byte order conversion for ${c_name} enum.
115 * Generated based on $json_filename:
118 static inline void _host_to_net_${c_name}(JNIEnv * env, jobject _host, vl_api_${c_name}_t * _net)
120 jclass enumClass = (*env)->FindClass(env, "${class_FQN}");
121 jfieldID valueFieldId = (*env)->GetStaticFieldID(env, enumClass, "value", "${jni_signature}");
122 ${jni_type} value = (*env)->GetStatic${jni_accessor}Field(env, enumClass, valueFieldId);
126 _ENUM_HOST_TO_NET_TEMPLATE = Template("""
128 * Network to host byte order conversion for ${c_name} type.
129 * Generated based on $json_filename:
132 static inline ${jni_type} _net_to_host_${c_name}(vl_api_${c_name}_t _net)
134 return (${jni_type}) $type_swap
138 def _generate_scalar_host_to_net_swap(field):
139 field_type = field.type
140 if field_type.is_swap_needed:
141 return field_type.get_host_to_net_function(field.java_name, "*_net")
143 return "*_net = %s" % field.java_name
146 def _generate_scalar_net_to_host_swap(field):
147 field_type = field.type
148 if field_type.is_swap_needed:
149 return "%s((%s) _net);" % (field_type.net_to_host_function, field_type.name)