From e749ffad9b4fe3110d97f366ebe39e7c9a4edd9d Mon Sep 17 00:00:00 2001
From: Jason Carey <jcarey@argv.me>
Date: Thu, 9 Jul 2015 14:05:20 -0400
Subject: SERVER-18531 Integrate SpiderMonkey

Provides SpiderMonkey 38.0.1esr as a JS engine for mongo and mongod.
---
 src/mongo/scripting/mozjs/cursor.cpp | 122 +++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 src/mongo/scripting/mozjs/cursor.cpp

(limited to 'src/mongo/scripting/mozjs/cursor.cpp')

diff --git a/src/mongo/scripting/mozjs/cursor.cpp b/src/mongo/scripting/mozjs/cursor.cpp
new file mode 100644
index 00000000000..8f6bb7b540c
--- /dev/null
+++ b/src/mongo/scripting/mozjs/cursor.cpp
@@ -0,0 +1,122 @@
+/**
+ * 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/cursor.h"
+
+#include "mongo/scripting/mozjs/bson.h"
+#include "mongo/scripting/mozjs/implscope.h"
+#include "mongo/scripting/mozjs/objectwrapper.h"
+#include "mongo/scripting/mozjs/valuereader.h"
+
+namespace mongo {
+namespace mozjs {
+
+const JSFunctionSpec CursorInfo::methods[5] = {
+    MONGO_ATTACH_JS_FUNCTION(hasNext),
+    MONGO_ATTACH_JS_FUNCTION(next),
+    MONGO_ATTACH_JS_FUNCTION(objsLeftInBatch),
+    MONGO_ATTACH_JS_FUNCTION(readOnly),
+    JS_FS_END,
+};
+
+const char* const CursorInfo::className = "Cursor";
+
+namespace {
+
+DBClientCursor* getCursor(JSObject* thisv) {
+    return static_cast<CursorInfo::CursorHolder*>(JS_GetPrivate(thisv))->cursor.get();
+}
+
+DBClientCursor* getCursor(JS::CallArgs& args) {
+    return getCursor(args.thisv().toObjectOrNull());
+}
+
+}  // namespace
+
+void CursorInfo::finalize(JSFreeOp* fop, JSObject* obj) {
+    auto cursor = static_cast<CursorInfo::CursorHolder*>(JS_GetPrivate(obj));
+
+    if (cursor) {
+        delete cursor;
+    }
+}
+
+void CursorInfo::construct(JSContext* cx, JS::CallArgs args) {
+    auto scope = getScope(cx);
+
+    scope->getCursorProto().newObject(args.rval());
+}
+
+void CursorInfo::Functions::next(JSContext* cx, JS::CallArgs args) {
+    auto cursor = getCursor(args);
+
+    if (!cursor) {
+        args.rval().setUndefined();
+        return;
+    }
+
+    ObjectWrapper o(cx, args.thisv());
+
+    BSONObj bson = cursor->next();
+    bool ro = o.hasField("_ro") ? o.getBoolean("_ro") : false;
+
+    ValueReader(cx, args.rval()).fromBSON(bson, ro);
+}
+
+void CursorInfo::Functions::hasNext(JSContext* cx, JS::CallArgs args) {
+    auto cursor = getCursor(args);
+
+    if (!cursor) {
+        args.rval().setBoolean(false);
+        return;
+    }
+
+    args.rval().setBoolean(cursor->more());
+}
+
+void CursorInfo::Functions::objsLeftInBatch(JSContext* cx, JS::CallArgs args) {
+    auto cursor = getCursor(args);
+
+    if (!cursor) {
+        args.rval().setInt32(0);
+        return;
+    }
+
+    args.rval().setInt32(cursor->objsLeftInBatch());
+}
+
+void CursorInfo::Functions::readOnly(JSContext* cx, JS::CallArgs args) {
+    ObjectWrapper(cx, args.thisv()).setBoolean("_ro", true);
+
+    args.rval().set(args.thisv());
+}
+
+}  // namespace mozjs
+}  // namespace mongo
-- 
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