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/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* 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.
*/
#include "rpc.h"
using namespace std;
namespace mbed {
RPC::RPC(const char *name) {
_from_construct = false;
if (name != NULL) {
_name = new char[strlen(name) + 1];
strcpy(_name, name);
} else {
_name = new char[12];
sprintf(_name, "obj%p", this);
}
// put this object at head of the list
_next = _head;
_head = this;
}
RPC::~RPC() {
// remove this object from the list
if (_head == this) { // first in the list, so just drop me
_head = _next;
} else { // find the object before me, then drop me
RPC* p = _head;
while (p->_next != this) {
p = p->_next;
}
p->_next = _next;
}
}
const rpc_method *RPC::get_rpc_methods() {
static const rpc_method methods[] = {
{"delete", rpc_method_caller<RPC, &RPC::delete_self> },
RPC_METHOD_END
};
return methods;
}
RPC *RPC::lookup(const char *name) {
size_t len = strlen(name);
for (RPC *p = _head; p != NULL; p = p->_next) {
/* Check that p->_name matches name and is the correct length */
if (strncmp(p->_name, name, len) == 0 && (strlen(p->_name) == len)) {
return p;
}
}
return NULL;
}
void RPC::delete_self() {
delete[] _name;
if (_from_construct) {
delete this;
}
}
void RPC::list_objs(Arguments *args, Reply *result) {
for (RPC *ptr = RPC::_head; ptr != NULL; ptr = ptr->_next) {
if (ptr->_from_construct) {
result->putData<const char*>(ptr->_name);
}
}
}
void RPC::clear(Arguments*, Reply*) {
RPC *ptr = RPC::_head;
while (ptr != NULL) {
RPC *tmp = ptr;
ptr = ptr->_next;
delete[] tmp->_name;
if (tmp->_from_construct) {
delete tmp;
}
}
}
const rpc_function RPC::_RPC_funcs[] = {
{"clear", &RPC::clear },
{ "objects", &RPC::list_objs },
RPC_METHOD_END
};
rpc_class RPC::_RPC_class = { "RPC", _RPC_funcs, NULL };
RPC *RPC::_head = NULL;
rpc_class *RPC::_classes = &_RPC_class;
bool RPC::call(const char *request, char *reply) {
if (request == NULL) return false;
Arguments args(request);
Reply r(reply);
/* If there's no name print object and class names to result */
if (args.obj_name == NULL) {
for (RPC *p = RPC::_head; p != NULL; p = p->_next) {
r.putData<const char*>(p->_name);
}
for (rpc_class *c = RPC::_classes; c != NULL; c = c->next) {
r.putData<const char*>(c->name);
}
return true;
}
/* First try matching an instance */
RPC *p = lookup(args.obj_name);
if (p != NULL) {
/* Get the list of methods we support */
const rpc_method *cur_method = p->get_rpc_methods();
/* When there's no method print method names to result */
if (args.method_name == NULL) {
while (true) {
for (; cur_method->name != NULL; cur_method++) {
r.putData<const char*>(cur_method->name);
}
/* write_name_arr's args are references, so result and cur_method will have changed */
if (cur_method->super != 0) {
cur_method = cur_method->super(p);
} else {
return true;
}
}
}
/* Look through the methods for the one whose name matches */
while (true) {
for (; cur_method->name != NULL; cur_method++) {
if (strcmp(cur_method->name, args.method_name) == 0) {
(cur_method->method_caller)(p, &args, &r);
return true;
}
}
if (cur_method->super != 0) {
cur_method = cur_method->super(p);
} else {
/* end of methods and no match */
return false;
}
}
}
/* Then try a class */
for (const rpc_class *q = _classes; q != NULL; q = q->next) {
if (strcmp(q->name, args.obj_name) == 0) {
/* Matched the class name, so get its functions */
const rpc_function *cur_func = q->static_functions;
if (args.method_name == NULL) {
for (; cur_func->name != NULL; cur_func++) {
r.putData<const char*>(cur_func->name);
}
return true;
} else {
/* Otherwise call the appropriate function */
for (; cur_func->name != NULL; cur_func++) {
if (strcmp(cur_func->name, args.method_name) == 0) {
(cur_func->function_caller)(&args, &r);
return true;
}
}
return false;
}
}
}
return false;
}
} // namespace mbed
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