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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/scripting/mozjs/nativefunction.h"
#include <cstdio>
#include "mongo/scripting/mozjs/implscope.h"
#include "mongo/scripting/mozjs/objectwrapper.h"
#include "mongo/scripting/mozjs/valuereader.h"
#include "mongo/scripting/mozjs/valuewriter.h"
#include "mongo/scripting/mozjs/wrapconstrainedmethod.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace mozjs {
const char* const NativeFunctionInfo::inheritFrom = "Function";
const char* const NativeFunctionInfo::className = "NativeFunction";
const JSFunctionSpec NativeFunctionInfo::methods[2] = {
MONGO_ATTACH_JS_CONSTRAINED_METHOD(toString, NativeFunctionInfo), JS_FS_END,
};
namespace {
/**
* Holder for the caller of ::make()'s callback function and context pointer
*/
class NativeHolder {
public:
NativeHolder(NativeFunction func, void* ctx) : _func(func), _ctx(ctx) {}
NativeFunction _func;
void* _ctx;
};
NativeHolder* getHolder(JS::CallArgs args) {
return static_cast<NativeHolder*>(JS_GetPrivate(&args.callee()));
}
} // namespace
void NativeFunctionInfo::call(JSContext* cx, JS::CallArgs args) {
auto holder = getHolder(args);
if (!holder) {
// Calling the prototype
args.rval().setUndefined();
return;
}
BSONObjBuilder bob;
for (unsigned i = 0; i < args.length(); i++) {
// 11 is enough here. unsigned's are only 32 bits, and 1 << 32 is only
// 10 decimal digits. +1 for the null and we're only at 11.
char buf[11];
std::sprintf(buf, "%i", i);
ValueWriter(cx, args.get(i)).writeThis(&bob, buf);
}
BSONObj out = holder->_func(bob.obj(), holder->_ctx);
ValueReader(cx, args.rval()).fromBSONElement(out.firstElement(), false);
}
void NativeFunctionInfo::finalize(JSFreeOp* fop, JSObject* obj) {
auto holder = static_cast<NativeHolder*>(JS_GetPrivate(obj));
if (holder)
delete holder;
}
void NativeFunctionInfo::Functions::toString::call(JSContext* cx, JS::CallArgs args) {
ObjectWrapper o(cx, args.thisv());
str::stream ss;
ss << "[native code]";
ValueReader(cx, args.rval()).fromStringData(ss.operator std::string());
}
void NativeFunctionInfo::make(JSContext* cx,
JS::MutableHandleObject obj,
NativeFunction function,
void* data) {
auto scope = getScope(cx);
scope->getProto<NativeFunctionInfo>().newObject(obj);
JS_SetPrivate(obj, new NativeHolder(function, data));
}
} // namespace mozjs
} // namespace mongo
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