/********************************************************************
 * 2014 -
 * open source under Apache License Version 2.0
 ********************************************************************/
/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
#ifndef _HDFS_LIBHDFS3_COMMON_STRINGUTIL_H_
#define _HDFS_LIBHDFS3_COMMON_STRINGUTIL_H_

#include <string.h>
#include <string>
#include <vector>
#include <cctype>

namespace Hdfs {
namespace Internal {

static inline std::vector<std::string> StringSplit(const std::string & str,
        const char * sep) {
    char * token, *lasts = NULL;
    std::string s = str;
    std::vector<std::string> retval;
    token = strtok_r(&s[0], sep, &lasts);

    while (token) {
        retval.push_back(token);
        token = strtok_r(NULL, sep, &lasts);
    }

    return retval;
}

static inline  std::string StringTrim(const std::string & str) {
    int start = 0, end = str.length();

    for (; start < static_cast<int>(str.length()); ++start) {
        if (!std::isspace(str[start])) {
            break;
        }
    }

    for (; end > 0; --end) {
        if (!std::isspace(str[end - 1])) {
            break;
        }
    }

    return str.substr(start, end - start);
}

static inline bool StringReplace(std::string& str, const std::string& from,
                           const std::string& to) {
    size_t start_pos = str.find(from);

    if (start_pos == std::string::npos) {
        return false;
    }

    str.replace(start_pos, from.length(), to);
    return true;
}

static inline bool StringReplaceAll(std::string& str, const std::string& from,
                              const std::string& to) {

    if (from.empty()) {
        return false;
    }

    bool retval = false;
    size_t start_pos = 0;

    while ((start_pos = str.find(from, start_pos)) != std::string::npos) {
        str.replace(start_pos, from.length(), to);
        start_pos += to.length();
        retval = true;
    }

    return retval;
}
}
}
#endif /* _HDFS_LIBHDFS3_COMMON_STRINGUTIL_H_ */