casbin/util/split.cpp

/*
 * Copyright 2020 The casbin Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "casbin/pch.h"

#ifndef SPLIT_CPP
#define SPLIT_CPP

#include <string.h>

#include "casbin/util/util.h"

#define LARGE 2147483647

namespace casbin {

std::vector<std::string> Split(std::string str, const std::string& del, int limit) {
    std::vector<std::string> tokens;

    if (limit <= 0)
        limit = LARGE;
    tokens.reserve((limit == LARGE) ? 0 : limit);
    for (int i = 1; i < limit; i++) {
        size_t pos = str.find(del);
        if (pos != std::string::npos) {
            tokens.emplace_back(str.substr(0, pos));
            str = str.substr(pos + del.length());
        } else
            break;
    }

    tokens.emplace_back(str);

    return tokens;
}

} // namespace casbin

#endif // SPLIT_CPP