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_field_swap, generate_j2c_identifiers, generate_c2j_swap
19 from jvpp_model import Class, Enum, Union
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)
35 elif isinstance(t, Union):
36 _generate_union(model, t, type_handlers)
38 logger.debug("Skipping custom JNI type handler generation for %s", t)
40 return "\n".join(type_handlers)
43 def _generate_class(model, t, type_handlers):
44 ref_name = t.java_name_lower
45 if t.name in model._aliases:
50 type_handlers.append(_TYPE_HOST_TO_NET_TEMPLATE.substitute(
52 json_filename=model.json_api_files,
53 json_definition=t.doc,
54 type_reference_name=ref_name,
56 jni_identifiers=generate_j2c_identifiers(t, class_ref_name="%sClass" % ref_name, object_ref_name="_host"),
57 type_swap=generate_j2c_swap(t, struct_ref_name="_net", is_alias=is_alias)
59 type_handlers.append(_TYPE_NET_TO_HOST_TEMPLATE.substitute(
61 json_filename=model.json_api_files,
62 json_definition=t.doc,
63 type_reference_name=ref_name,
65 type_swap=generate_c2j_swap(t, object_ref_name="_host", struct_ref_name="_net", is_alias=is_alias)
68 _TYPE_HOST_TO_NET_TEMPLATE = Template("""
70 * Host to network byte order conversion for ${c_name} type.
71 * Generated based on $json_filename:
74 static inline void _host_to_net_${c_name}(JNIEnv * env, jobject _host, vl_api_${c_name}_t * _net)
76 jclass ${type_reference_name}Class = (*env)->FindClass(env, "${class_FQN}");
81 _TYPE_NET_TO_HOST_TEMPLATE = Template("""
83 * Network to host byte order conversion for ${c_name} type.
84 * Generated based on $json_filename:
87 static inline void _net_to_host_${c_name}(JNIEnv * env, vl_api_${c_name}_t * _net, jobject _host)
89 jclass ${type_reference_name}Class = (*env)->FindClass(env, "${class_FQN}");
94 def _generate_enum(model, t, type_handlers):
95 value_type = t.value.type
96 type_handlers.append(_ENUM_NET_TO_HOST_TEMPLATE.substitute(
98 json_filename=model.json_api_files,
99 json_definition=t.doc,
100 class_FQN=t.jni_name,
101 jni_signature=value_type.jni_signature,
102 jni_type=value_type.jni_type,
103 jni_accessor=value_type.jni_accessor,
104 swap=_generate_scalar_host_to_net_swap(t.value)
107 type_handlers.append(_ENUM_HOST_TO_NET_TEMPLATE.substitute(
109 json_filename=model.json_api_files,
110 json_definition=t.doc,
111 class_FQN=t.jni_name,
112 jni_type=value_type.jni_type,
113 type_swap=_generate_scalar_net_to_host_swap(t.value)
116 _ENUM_NET_TO_HOST_TEMPLATE = Template("""
118 * Host to network byte order conversion for ${c_name} enum.
119 * Generated based on $json_filename:
122 static inline void _host_to_net_${c_name}(JNIEnv * env, jobject _host, vl_api_${c_name}_t * _net)
124 jclass enumClass = (*env)->FindClass(env, "${class_FQN}");
125 jmethodID getValueMethod = (*env)->GetMethodID(env, enumClass, "ordinal", "()I");
126 ${jni_type} value = (*env)->CallIntMethod(env, _host, getValueMethod);
130 _ENUM_HOST_TO_NET_TEMPLATE = Template("""
132 * Network to host byte order conversion for ${c_name} type.
133 * Generated based on $json_filename:
136 static inline ${jni_type} _net_to_host_${c_name}(vl_api_${c_name}_t _net)
138 return (${jni_type}) $type_swap
142 def _generate_scalar_host_to_net_swap(field):
143 field_type = field.type
144 if field_type.is_swap_needed:
145 return field_type.get_host_to_net_function(field.java_name, "*_net")
147 return "*_net = %s" % field.java_name
150 def _generate_scalar_net_to_host_swap(field):
151 field_type = field.type
152 if field_type.is_swap_needed:
153 return "%s((%s) _net);" % (field_type.net_to_host_function, field_type.name)
158 def _generate_union(model, t, type_handlers):
159 type_handlers.append(_generate_union_host_to_net(model, t))
160 type_handlers.append(_generate_union_net_to_host(model, t))
163 def _generate_union_host_to_net(model, t):
165 for i, field in enumerate(t.fields):
166 field_type = field.type
167 if t.name in model._aliases:
171 swap.append(_UNION_FIELD_HOST_TO_NET_TEMPLATE.substitute(
173 java_name=field.java_name,
174 jni_signature=field_type.jni_signature,
175 jni_type=field_type.jni_type,
176 jni_accessor=field_type.jni_accessor,
177 swap=generate_j2c_field_swap(field, struct_ref_name="_net", is_alias=is_alias)
180 return _UNION_HOST_TO_NET_TEMPLATE.substitute(
182 json_filename=model.json_api_files,
183 json_definition=t.doc,
184 class_FQN=t.jni_name,
188 _UNION_FIELD_HOST_TO_NET_TEMPLATE = Template("""
189 if (_activeMember == ${field_index}) {
190 jfieldID fieldId = (*env)->GetFieldID(env, _class, "${java_name}", "${jni_signature}");
191 ${jni_type} ${java_name} = (*env)->Get${jni_accessor}Field(env, _host, fieldId);
195 _UNION_HOST_TO_NET_TEMPLATE = Template("""
197 * Host to network byte order conversion for ${c_name} union.
198 * Generated based on $json_filename:
201 static inline void _host_to_net_${c_name}(JNIEnv * env, jobject _host, vl_api_${c_name}_t * _net)
203 jclass _class = (*env)->FindClass(env, "${class_FQN}");
205 jfieldID _activeMemberFieldId = (*env)->GetFieldID(env, _class, "_activeMember", "I");
206 jint _activeMember = (*env)->GetIntField(env, _host, _activeMemberFieldId);
211 def _generate_union_net_to_host(model, t):
212 if t.name in model._aliases:
216 return _UNION_NET_TO_HOST_TEMPLATE.substitute(
218 json_filename=model.json_api_files,
219 json_definition=t.doc,
220 type_reference_name=t.java_name_lower,
221 class_FQN=t.jni_name,
222 swap=generate_c2j_swap(t, object_ref_name="_host", struct_ref_name="_net", is_alias=is_alias)
225 _UNION_NET_TO_HOST_TEMPLATE = Template("""
227 * Network to host byte order conversion for ${c_name} union.
228 * Generated based on $json_filename:
231 static inline void _net_to_host_${c_name}(JNIEnv * env, vl_api_${c_name}_t * _net, jobject _host)
233 jclass ${type_reference_name}Class = (*env)->FindClass(env, "${class_FQN}");