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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/jsstringwrapper.h"
#include <js/CharacterEncoding.h>
#include <jsapi.h>
#include <utility>
#include "mongo/base/error_codes.h"
#include "mongo/scripting/mozjs/exception.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace mozjs {
JSStringWrapper::JSStringWrapper(std::int32_t value) : _isSet(true) {
_length = sprintf(_buf, "%d", value);
}
JSStringWrapper::JSStringWrapper(JSContext* cx, JSString* str) : _isSet(true) {
if (!str)
throwCurrentJSException(cx, ErrorCodes::InternalError, "Cannot encode null JSString");
// We have to do this flatstring thing because no public api tells us
// how long the utf8 strings we get out are.
//
// Well, at least js/CharacterEncoding's GetDeflatedUTF8StringLength
// and JS_flattenString are all in the public headers...
JSFlatString* flat = JS_FlattenString(cx, str);
if (!flat)
throwCurrentJSException(cx, ErrorCodes::InternalError, "Failed to flatten JSString");
_length = JS::GetDeflatedUTF8StringLength(flat);
char* out;
if (_length < sizeof(_buf)) {
out = _buf;
} else {
_str.reset(new char[_length + 1]);
out = _str.get();
}
JS::DeflateStringToUTF8Buffer(flat, mozilla::RangedPtr<char>(out, _length));
out[_length] = '\0';
}
StringData JSStringWrapper::toStringData() const {
invariant(_isSet);
return StringData(_str ? _str.get() : _buf, _length);
}
std::string JSStringWrapper::toString() const {
return toStringData().toString();
}
JSStringWrapper::operator bool() const {
return _isSet;
}
} // namespace mozjs
} // namespace mongo
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