Kayne Ruse
130 lines
3.1 KiB
C++
130 lines
3.1 KiB
C++
/* Copyright: (c) Kayne Ruse 2013, 2014
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*/
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#include "config_utility.hpp"
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#include <cstdlib>
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#include <fstream>
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#include <stdexcept>
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void ConfigUtility::Load(std::string fname) {
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//clear the stored configuration
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configMap.clear();
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//pass to the recursive method
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configMap = Read(fname);
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}
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ConfigUtility::table_t ConfigUtility::Read(std::string fname) {
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//read in and return this file's data
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table_t retTable;
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std::ifstream is(fname);
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if (!is.is_open()) {
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std::string msg;
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msg += "Failed to open a config file: ";
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msg += fname;
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throw(std::runtime_error(msg));
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}
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std::string key, val;
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while(true) { //forever
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//eat whitespace
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while(isspace(is.peek())) {
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is.ignore();
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}
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//end of file
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if (is.eof()) {
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break;
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}
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//skip comment lines
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if (is.peek() == '#') {
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while(is.peek() != '\n' && !is.eof()) {
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is.ignore();
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}
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continue;
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}
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//read in the pair
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getline(is, key,'=');
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getline(is, val);
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//trim the strings at the start & end
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while(key.size() && isspace(*key.begin())) key.erase(0, 1);
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while(val.size() && isspace(*val.begin())) val.erase(0, 1);
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while(key.size() && isspace(*(key.end()-1))) key.erase(key.end() - 1);
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while(val.size() && isspace(*(val.end()-1))) val.erase(val.end() - 1);
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//disallow empty/wiped values
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if (key.size() == 0) {
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continue;
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}
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//save the pair
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retTable[key] = val;
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}
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is.close();
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//load in any subordinate config files
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if (retTable.find("config.next") != retTable.end()) {
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table_t subTable = Read(retTable["config.next"]);
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retTable.insert(subTable.begin(), subTable.end());
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}
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return retTable;
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}
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//-------------------------
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//Convert to a type
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//-------------------------
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std::string& ConfigUtility::String(std::string s) {
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return configMap[s];
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}
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int ConfigUtility::Integer(std::string s) {
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table_t::iterator it = configMap.find(s);
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if (it == configMap.end()) {
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return 0;
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}
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return atoi(it->second.c_str());
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}
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double ConfigUtility::Double(std::string s) {
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table_t::iterator it = configMap.find(s);
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if (it == configMap.end()) {
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return 0.0;
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}
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return atof(it->second.c_str());
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}
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bool ConfigUtility::Boolean(std::string s) {
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table_t::iterator it = configMap.find(s);
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if (it == configMap.end()) {
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return false;
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}
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return it->second == "true";
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}
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