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#!/usr/bin/env python
#
# Copyright (c) 2016 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from string import Template
import util
variable_length_array_value_template = Template("""mp->${length_var_name}""")
variable_length_array_template = Template("""clib_net_to_host_${length_field_type}(${value})""")
dto_field_id_template = Template("""
jfieldID ${field_reference_name}FieldId = (*env)->GetFieldID(env, ${class_ref_name}Class, "${field_name}", "${jni_signature}");""")
default_dto_field_setter_template = Template("""
(*env)->Set${jni_setter}(env, ${object_name}, ${field_reference_name}FieldId, mp->${c_name});
""")
variable_length_array_value_template = Template("""mp->${length_var_name}""")
variable_length_array_template = Template("""clib_net_to_host_${length_field_type}(${value})""")
u16_dto_field_setter_template = Template("""
(*env)->Set${jni_setter}(env, ${object_name}, ${field_reference_name}FieldId, clib_net_to_host_u16(mp->${c_name}));
""")
u32_dto_field_setter_template = Template("""
(*env)->Set${jni_setter}(env, ${object_name}, ${field_reference_name}FieldId, clib_net_to_host_u32(mp->${c_name}));
""")
u64_dto_field_setter_template = Template("""
(*env)->Set${jni_setter}(env, ${object_name}, ${field_reference_name}FieldId, clib_net_to_host_u64(mp->${c_name}));
""")
u8_array_dto_field_setter_template = Template("""
jbyteArray ${field_reference_name} = (*env)->NewByteArray(env, ${field_length});
(*env)->SetByteArrayRegion(env, ${field_reference_name}, 0, ${field_length}, (const jbyte*)mp->${c_name});
(*env)->SetObjectField(env, ${object_name}, ${field_reference_name}FieldId, ${field_reference_name});
""")
u16_array_dto_field_setter_template = Template("""
{
jshortArray ${field_reference_name} = (*env)->NewShortArray(env, ${field_length});
jshort * ${field_reference_name}ArrayElements = (*env)->GetShortArrayElements(env, ${field_reference_name}, NULL);
unsigned int _i;
for (_i = 0; _i < ${field_length}; _i++) {
${field_reference_name}ArrayElements[_i] = clib_net_to_host_u16(mp->${c_name}[_i]);
}
(*env)->ReleaseShortArrayElements(env, ${field_reference_name}, ${field_reference_name}ArrayElements, 0);
(*env)->SetObjectField(env, ${object_name}, ${field_reference_name}FieldId, ${field_reference_name});
}
""")
u32_array_dto_field_setter_template = Template("""
{
jintArray ${field_reference_name} = (*env)->NewIntArray(env, ${field_length});
jint * ${field_reference_name}ArrayElements = (*env)->GetIntArrayElements(env, ${field_reference_name}, NULL);
unsigned int _i;
for (_i = 0; _i < ${field_length}; _i++) {
${field_reference_name}ArrayElements[_i] = clib_net_to_host_u32(mp->${c_name}[_i]);
}
(*env)->ReleaseIntArrayElements(env, ${field_reference_name}, ${field_reference_name}ArrayElements, 0);
(*env)->SetObjectField(env, ${object_name}, ${field_reference_name}FieldId, ${field_reference_name});
}
""")
# For each u64 array we get its elements. Then we convert values to host byte order.
# All changes to jlong* buffer are written to jlongArray (isCopy is set to NULL)
u64_array_dto_field_setter_template = Template("""
{
jlongArray ${field_reference_name} = (*env)->NewLongArray(env, ${field_length});
jlong * ${field_reference_name}ArrayElements = (*env)->GetLongArrayElements(env, ${field_reference_name}, NULL);
unsigned int _i;
for (_i = 0; _i < ${field_length}; _i++) {
${field_reference_name}ArrayElements[_i] = clib_net_to_host_u64(mp->${c_name}[_i]);
}
(*env)->ReleaseLongArrayElements(env, ${field_reference_name}, ${field_reference_name}ArrayElements, 0);
(*env)->SetObjectField(env, ${object_name}, ${field_reference_name}FieldId, ${field_reference_name});
}
""")
dto_field_setter_templates = {'u8': default_dto_field_setter_template,
'u16': u16_dto_field_setter_template,
'u32': u32_dto_field_setter_template,
'i32': u32_dto_field_setter_template,
'u64': u64_dto_field_setter_template,
'f64': default_dto_field_setter_template, # fixme
'u8[]': u8_array_dto_field_setter_template,
'u16[]': u16_array_dto_field_setter_template,
'u32[]': u32_array_dto_field_setter_template,
'u64[]': u64_array_dto_field_setter_template
}
def jni_reply_handler_for_type(handler_name, ref_name, field_type, c_name, field_reference_name,
field_name, field_length, is_variable_len_array, length_field_type,
object_name="dto"):
"""
Generates jni code that initializes a field of java object (dto or custom type).
To be used in reply message handlers.
:param field_type: type of the field to be initialized (as defined in vpe.api)
:param c_name: name of the message struct member that stores initialization value
:param field_reference_name: name of the field reference in generated code
:param field_name: name of the field (camelcase)
:param field_length: integer or name of variable that stores field length
:param object_name: name of the object to be initialized
"""
# todo move validation to vppapigen
if field_type.endswith('[]') and field_length == '0':
raise Exception('Variable array \'%s\' defined in \'%s\' '
'should have defined length (e.g. \'%s[%s_length]\''
% (c_name, handler_name, c_name, c_name))
if is_variable_len_array:
length_var_name = field_length
field_length = variable_length_array_value_template.substitute(length_var_name=length_var_name)
if length_field_type != 'u8': # we need net to host conversion:
field_length = variable_length_array_template.substitute(
length_field_type=length_field_type, value=field_length)
# for retval don't generate setters
if util.is_retval_field(c_name):
return ""
jni_signature = util.jni_2_signature_mapping[field_type]
jni_setter = util.jni_field_accessors[field_type]
result = dto_field_id_template.substitute(
field_reference_name=field_reference_name,
field_name=field_name,
class_ref_name=ref_name,
jni_signature=jni_signature)
dto_setter_template = dto_field_setter_templates[field_type]
result += dto_setter_template.substitute(
jni_signature=jni_signature,
object_name=object_name,
field_reference_name=field_reference_name,
c_name=c_name,
jni_setter=jni_setter,
field_length=field_length)
return result
request_field_identifier_template = Template("""
jfieldID ${field_reference_name}FieldId = (*env)->GetFieldID(env, ${object_name}Class, "${field_name}", "${jni_signature}");
${jni_type} ${field_reference_name} = (*env)->Get${jni_getter}(env, ${object_name}, ${field_reference_name}FieldId);
""")
array_length_enforcement_template = Template("""
size_t max_size = ${field_length};
if (cnt > max_size) cnt = max_size;""")
u8_struct_setter_template = Template("""
mp->${c_name} = ${field_reference_name};""")
u16_struct_setter_template = Template("""
mp->${c_name} = clib_host_to_net_u16(${field_reference_name});""")
u32_struct_setter_template = Template("""
mp->${c_name} = clib_host_to_net_u32(${field_reference_name});""")
i32_struct_setter_template = Template("""
mp->${c_name} = clib_host_to_net_i32(${field_reference_name});!""")
u64_struct_setter_template = Template("""
mp->${c_name} = clib_host_to_net_u64(${field_reference_name});""")
array_length_enforcement_template = Template("""
size_t max_size = ${field_length};
if (cnt > max_size) cnt = max_size;""")
u8_array_struct_setter_template = Template("""
if (${field_reference_name}) {
jsize cnt = (*env)->GetArrayLength (env, ${field_reference_name});
${field_length_check}
(*env)->GetByteArrayRegion(env, ${field_reference_name}, 0, cnt, (jbyte *)mp->${c_name});
}
""")
u16_array_struct_setter_template = Template("""
jshort * ${field_reference_name}ArrayElements = (*env)->GetShortArrayElements(env, ${field_reference_name}, NULL);
if (${field_reference_name}) {
size_t _i;
jsize cnt = (*env)->GetArrayLength (env, ${field_reference_name});
${field_length_check}
for (_i = 0; _i < cnt; _i++) {
mp->${c_name}[_i] = clib_host_to_net_u16(${field_reference_name}ArrayElements[_i]);
}
}
(*env)->ReleaseShortArrayElements (env, ${field_reference_name}, ${field_reference_name}ArrayElements, 0);
""")
u32_array_struct_setter_template = Template("""
jint * ${field_reference_name}ArrayElements = (*env)->GetIntArrayElements(env, ${field_reference_name}, NULL);
if (${field_reference_name}) {
size_t _i;
jsize cnt = (*env)->GetArrayLength (env, ${field_reference_name});
${field_length_check}
for (_i = 0; _i < cnt; _i++) {
mp->${c_name}[_i] = clib_host_to_net_u32(${field_reference_name}ArrayElements[_i]);
}
}
(*env)->ReleaseIntArrayElements (env, ${field_reference_name}, ${field_reference_name}ArrayElements, 0);
""")
u64_array_struct_setter_template = Template("""
jlong * ${field_reference_name}ArrayElements = (*env)->GetLongArrayElements(env, ${field_reference_name}, NULL);
if (${field_reference_name}) {
size_t _i;
jsize cnt = (*env)->GetArrayLength (env, ${field_reference_name});
${field_length_check}
for (_i = 0; _i < cnt; _i++) {
mp->${c_name}[_i] = clib_host_to_net_u64(${field_reference_name}ArrayElements[_i]);
}
}
(*env)->ReleaseLongArrayElements (env, ${field_reference_name}, ${field_reference_name}ArrayElements, 0);
""")
struct_setter_templates = {'u8': u8_struct_setter_template,
'u16': u16_struct_setter_template,
'u32': u32_struct_setter_template,
'i32': u32_struct_setter_template,
'u64': u64_struct_setter_template,
'u8[]': u8_array_struct_setter_template,
'u16[]': u16_array_struct_setter_template,
'u32[]': u32_array_struct_setter_template,
'u64[]': u64_array_struct_setter_template
}
def jni_request_binding_for_type(field_type, c_name, field_reference_name, field_name, field_length,
is_variable_len_array, object_name="request"):
"""
Generates jni code that initializes C structure that corresponds to a field of java object
(dto or custom type). To be used in request message handlers.
:param field_type: type of the field to be initialized (as defined in vpe.api)
:param c_name: name of the message struct member to be initialized
:param field_reference_name: name of the field reference in generated code
:param field_name: name of the field (camelcase)
:param field_length: integer or name of variable that stores field length
:param object_name: name of the object to be initialized
"""
# field identifiers
jni_type = util.vpp_2_jni_type_mapping[field_type]
jni_signature = util.jni_2_signature_mapping[field_type]
jni_getter = util.jni_field_accessors[field_type]
# field identifier
msg_initialization = request_field_identifier_template.substitute(
jni_type=jni_type,
field_reference_name=field_reference_name,
field_name=field_name,
jni_signature=jni_signature,
jni_getter=jni_getter,
object_name=object_name)
# field setter
field_length_check = ""
# check if we are processing variable length array:
if is_variable_len_array:
field_length = util.underscore_to_camelcase(field_length)
# enforce max length if array has fixed length or uses variable length syntax
if str(field_length) != "0":
field_length_check = array_length_enforcement_template.substitute(field_length=field_length)
struct_setter_template = struct_setter_templates[field_type]
msg_initialization += struct_setter_template.substitute(
c_name=c_name,
field_reference_name=field_reference_name,
field_length_check=field_length_check)
return msg_initialization
|
