/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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 "str_utils.h"

using namespace std;

std::string getNextToken(const std::string& str, size_t pos, size_t* last,
                         const std::string& delim) {
    if (str.size() == 0 || pos >= str.size()) return "";

    pos = str.find_first_not_of(WHITESPACE, pos);
    if (pos == std::string::npos) return "";

    *last = str.find_first_of(delim, pos);
    if (*last == std::string::npos) *last = str.size();
    std::string retval = str.substr(pos, *last - pos);
    retval = trim(retval);
    return retval;
}

std::string trim(const string& str) {
    string result;
    string::size_type start = str.find_first_not_of(WHITESPACE, 0);
    string::size_type end = str.find_last_not_of(WHITESPACE);
    if (start == string::npos || end == string::npos) {
        result = string("");
    } else {
        result = str.substr(start, end - start + 1);
    }
    return result;
}