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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/numberlong.h"
#include <js/Conversions.h>
#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"
#include "mongo/util/text.h"
namespace mongo {
namespace mozjs {
const JSFunctionSpec NumberLongInfo::methods[5] = {
MONGO_ATTACH_JS_CONSTRAINED_METHOD(toNumber, NumberLongInfo),
MONGO_ATTACH_JS_CONSTRAINED_METHOD(toString, NumberLongInfo),
MONGO_ATTACH_JS_CONSTRAINED_METHOD(valueOf, NumberLongInfo),
MONGO_ATTACH_JS_CONSTRAINED_METHOD(compare, NumberLongInfo),
JS_FS_END,
};
const char* const NumberLongInfo::className = "NumberLong";
long long NumberLongInfo::ToNumberLong(JSContext* cx, JS::HandleValue thisv) {
JS::RootedObject obj(cx, thisv.toObjectOrNull());
return ToNumberLong(cx, obj);
}
long long NumberLongInfo::ToNumberLong(JSContext* cx, JS::HandleObject thisv) {
ObjectWrapper o(cx, thisv);
if (!o.hasField(InternedString::top)) {
if (!o.hasField(InternedString::floatApprox))
uasserted(ErrorCodes::InternalError, "No top and no floatApprox fields");
return o.getNumberLongLong(InternedString::floatApprox);
}
if (!o.hasField(InternedString::bottom))
uasserted(ErrorCodes::InternalError, "top but no bottom field");
return ((unsigned long long)((long long)o.getNumberLongLong(InternedString::top) << 32) +
(unsigned)(o.getNumberLongLong(InternedString::bottom)));
}
void NumberLongInfo::Functions::valueOf::call(JSContext* cx, JS::CallArgs args) {
long long out = NumberLongInfo::ToNumberLong(cx, args.thisv());
args.rval().setDouble(out);
}
void NumberLongInfo::Functions::toNumber::call(JSContext* cx, JS::CallArgs args) {
valueOf::call(cx, args);
}
void NumberLongInfo::Functions::toString::call(JSContext* cx, JS::CallArgs args) {
str::stream ss;
long long val = NumberLongInfo::ToNumberLong(cx, args.thisv());
const long long limit = 2LL << 30;
if (val <= -limit || limit <= val)
ss << "NumberLong(\"" << val << "\")";
else
ss << "NumberLong(" << val << ")";
ValueReader(cx, args.rval()).fromStringData(ss.operator std::string());
}
void NumberLongInfo::Functions::compare::call(JSContext* cx, JS::CallArgs args) {
uassert(ErrorCodes::BadValue, "NumberLong.compare() needs 1 argument", args.length() == 1);
uassert(ErrorCodes::BadValue,
"NumberLong.compare() argument must be an object",
args.get(0).isObject());
long long thisVal = NumberLongInfo::ToNumberLong(cx, args.thisv());
long long otherVal = NumberLongInfo::ToNumberLong(cx, args.get(0));
int comparison = 0;
if (thisVal < otherVal) {
comparison = -1;
} else if (thisVal > otherVal) {
comparison = 1;
}
args.rval().setDouble(comparison);
}
void NumberLongInfo::construct(JSContext* cx, JS::CallArgs args) {
uassert(ErrorCodes::BadValue,
"NumberLong needs 0, 1 or 3 arguments",
args.length() == 0 || args.length() == 1 || args.length() == 3);
auto scope = getScope(cx);
JS::RootedObject thisv(cx);
scope->getProto<NumberLongInfo>().newObject(&thisv);
ObjectWrapper o(cx, thisv);
JS::RootedValue floatApprox(cx);
JS::RootedValue top(cx);
JS::RootedValue bottom(cx);
if (args.length() == 0) {
o.setNumber(InternedString::floatApprox, 0);
} else if (args.length() == 1) {
auto arg = args.get(0);
if (arg.isNumber()) {
o.setValue(InternedString::floatApprox, arg);
} else {
std::string str = ValueWriter(cx, arg).toString();
long long val;
// For string values we call strtoll because we expect non-number string
// values to fail rather than return 0 (which is the behavior of ToInt64.
if (arg.isString())
val = parseLL(str.c_str());
// Otherwise we call the toNumber on the js value to get the long long value.
else
val = ValueWriter(cx, arg).toInt64();
// values above 2^53 are not accurately represented in JS
if (val == INT64_MIN || std::abs(val) >= 9007199254740992LL) {
auto val64 = static_cast<unsigned long long>(val);
o.setNumber(InternedString::floatApprox, val);
o.setNumber(InternedString::top, val64 >> 32);
o.setNumber(InternedString::bottom, val64 & 0x00000000ffffffff);
} else {
o.setNumber(InternedString::floatApprox, val);
}
}
} else {
if (!args.get(0).isNumber())
uasserted(ErrorCodes::BadValue, "floatApprox must be a number");
if (!args.get(1).isNumber() ||
args.get(1).toNumber() !=
static_cast<double>(static_cast<uint32_t>(args.get(1).toNumber())))
uasserted(ErrorCodes::BadValue, "top must be a 32 bit unsigned number");
if (!args.get(2).isNumber() ||
args.get(2).toNumber() !=
static_cast<double>(static_cast<uint32_t>(args.get(2).toNumber())))
uasserted(ErrorCodes::BadValue, "bottom must be a 32 bit unsigned number");
o.setValue(InternedString::floatApprox, args.get(0));
o.setValue(InternedString::top, args.get(1));
o.setValue(InternedString::bottom, args.get(2));
}
args.rval().setObjectOrNull(thisv);
}
} // namespace mozjs
} // namespace mongo
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