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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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;
}
JS::RootedObject robj(cx, JS_NewArrayObject(cx, args));
if (!robj) {
uasserted(ErrorCodes::JSInterpreterFailure, "Failed to JS_NewArrayObject");
}
BSONObj out = holder->_func(ObjectWrapper(cx, robj).toBSON(), holder->_ctx);
ValueReader(cx, args.rval()).fromBSONElement(out.firstElement(), out, false);
}
void NativeFunctionInfo::finalize(js::FreeOp* fop, JSObject* obj) {
auto holder = static_cast<NativeHolder*>(JS_GetPrivate(obj));
if (holder)
getScope(fop)->trackedDelete(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, scope->trackedNew<NativeHolder>(function, data));
}
} // namespace mozjs
} // namespace mongo
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