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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/rpc/document_range.h"
#include <algorithm>
#include <cstring>
#include <tuple>
#include <utility>
#include "mongo/base/data_type_validated.h"
#include "mongo/rpc/object_check.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace rpc {
DocumentRange::DocumentRange(const char* begin, const char* end)
: _range{begin, end}
{}
DocumentRange::const_iterator DocumentRange::begin() const {
return const_iterator{ConstDataRangeCursor{_range}};
}
DocumentRange::const_iterator DocumentRange::end() const {
return const_iterator{};
}
ConstDataRange DocumentRange::data() const {
return _range;
}
bool operator==(const DocumentRange& lhs, const DocumentRange& rhs) {
// We might want to change this to use std::equal in the future if
// we ever allow non-contigious document ranges
return (lhs._range.length() == rhs._range.length()) &&
(std::memcmp(lhs._range.data(), rhs._range.data(), lhs._range.length()) == 0);
}
bool operator!=(const DocumentRange& lhs, const DocumentRange& rhs) {
return !(lhs == rhs);
}
DocumentRange::const_iterator::const_iterator(ConstDataRangeCursor cursor)
: _cursor{cursor} {
operator++();
}
DocumentRange::const_iterator::reference
DocumentRange::const_iterator::operator*() const {
return _obj;
}
DocumentRange::const_iterator::pointer
DocumentRange::const_iterator::operator->() const {
return &_obj;
}
DocumentRange::const_iterator&
DocumentRange::const_iterator::operator++() {
if (_cursor.length() == 0) {
*this = const_iterator{};
} else {
_obj = std::move(uassertStatusOK(_cursor.readAndAdvance<Validated<BSONObj>>()).val);
}
return *this;
}
DocumentRange::const_iterator
DocumentRange::const_iterator::operator++(int) {
auto pre = const_iterator{_cursor};
operator++();
return pre;
}
bool operator==(const DocumentRange::const_iterator& lhs,
const DocumentRange::const_iterator& rhs) {
return lhs._cursor == rhs._cursor;
}
bool operator!=(const DocumentRange::const_iterator& lhs,
const DocumentRange::const_iterator& rhs) {
return !(lhs == rhs);
}
} // namespace rpc
} // namespace mongo
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