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configreader.cpp
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configreader.cpp
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// Copyright (c) 2011-2014 Zeex
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#include <algorithm>
#include <cctype>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include "configreader.h"
ConfigReader::ConfigReader()
: loaded_(false)
{
}
ConfigReader::ConfigReader(const std::string &filename)
: loaded_(false)
{
LoadFile(filename);
}
struct is_not_space {
bool operator()(char c) {
return !(c == ' ' || c == '\r' || c == '\n' || c == '\t');
}
};
static inline std::string &TrimStringLeft(std::string &s) {
s.erase(s.begin(), std::find_if(s.begin(), s.end(), is_not_space()));
return s;
}
static inline std::string &TrimStringRight(std::string &s) {
s.erase(std::find_if(s.rbegin(), s.rend(), is_not_space()).base(), s.end());
return s;
}
static inline std::string &TrimString(std::string &s) {
return TrimStringLeft(TrimStringRight(s));
}
bool ConfigReader::LoadFile(const std::string &filename) {
std::ifstream cfg(filename.c_str());
if (cfg.is_open()) {
std::string line, name, value;
while (std::getline(cfg, line, '\n')) {
std::stringstream stream(line);
std::getline(stream, name, ' ');
TrimString(name);
std::getline(stream, value, '\n');
TrimString(value);
options_.insert(std::make_pair(name, value));
}
loaded_ = true;
}
return loaded_;
}