Remove dependency to libconfig++ #2
Geoffrey Merck
4 years ago
parent
2a08b3e4fe
commit
38d016d540
@ -0,0 +1,281 @@
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/*
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* Copyright (c) 2021 by Geoffrey Merck F4FXL / KC3FRA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <iostream>
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#include <fstream>
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#include <sstream>
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#include <boost/algorithm/string.hpp>
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#include "Utils.h"
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#include "Config.h"
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#include "Log.h"
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CConfig::CConfig(const std::string filename) :
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m_filename(filename)
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{
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}
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CConfig::~CConfig()
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{
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for(auto it = m_sections.begin(); it != m_sections.end(); it++) {
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delete it->second;
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}
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m_sections.clear();
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}
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bool CConfig::load()
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{
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std::ifstream file;
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file.open(m_filename, std::ios::in);
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if(!file.is_open()) {
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CLog::logError("Failed to open configuration file %s", m_filename);
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return false;
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}
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CConfigSection * currentSection = nullptr;
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while(!file.eof()) {
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std::string line;
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std::getline(file, line);
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stripComment(line);
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if(isConfigSection(line)) {
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auto it = m_sections.find(line);
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currentSection = it != m_sections.end() ? it->second : nullptr;
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if(currentSection == nullptr) {
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currentSection = new CConfigSection(line);
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m_sections[currentSection->getName()] = currentSection;
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}
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} else if(isConfigValue(line) && currentSection != nullptr) {
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TConfigValue * configValue = readKeyAndValue(line);
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if(configValue != nullptr) {
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currentSection->getValues()[configValue->m_key] = configValue;
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}
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}
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}
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file.close();
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return true;
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}
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void CConfig::stripComment(std::string& s) const
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{
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boost::trim(s);
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if(s.length() > 0 && s[0] == '#') {
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//we have a lien consisting only of comment, truncate it and leave
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s.resize(0);
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return;
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}
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char * sdup = strdup(s.c_str());
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char * uncommentedPart = strtok(sdup, "#");
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s = std::string(uncommentedPart != nullptr ? uncommentedPart : "");
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boost::trim(s);
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free(sdup);// could we use delete sdup here?
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}
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TConfigValue * CConfig::readKeyAndValue(const std::string s) const
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{
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TConfigValue* res = nullptr;
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char * sdup = strdup(boost::trim_copy(s).c_str());
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char * keyPtr = strtok(sdup, "=");
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std::string key(keyPtr != nullptr ? keyPtr : "");
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boost::trim(key);
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if(!key.empty()) {
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char * valuePtr = strtok(nullptr, "=");
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std::string value(valuePtr != nullptr? valuePtr : "");
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res = new TConfigValue;
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res->m_key = key;
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res->m_value = boost::trim_copy(value);
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}
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free(sdup);// could we use delete sdup here?
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return res;
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}
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bool CConfig::getValue(const std::string §ion, const std::string& key, bool &value, bool defaultValue) const
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{
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std::string valueTemp;
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std::string dafaultValueStr = defaultValue ? "true" : "false";
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bool ret = getValue(section, key, valueTemp, dafaultValueStr, {"true", "1", "false", "0"});
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if(ret) {
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if(isSameNoCase(valueTemp, std::string("true")) || valueTemp == "1")
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value = true;
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else if(isSameNoCase(valueTemp, std::string("false")) || valueTemp == "0")
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value = false;
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}
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return ret;
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}
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bool CConfig::getValue(const std::string §ion, const std::string& key, int &value, int min, int max, int defaultValue) const
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{
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TConfigValue * val = lookupValue(section, key);
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if(val == nullptr || val->m_value.empty()) {
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value = defaultValue;
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return true;
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}
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if(!isDecimalInteger(val->m_value)){
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CLog::logError("Configuration error: %s.%s is not a valid number (%s)", section.c_str(), key.c_str(), val->m_value.c_str());
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return false;
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}
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int tmpValue = std::strtol(val->m_value.c_str(), nullptr, 10);
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if(tmpValue < min || tmpValue > max) {
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CLog::logError("Configuration error: %s.%s is out of range must be between %d and %d, actual %d", section.c_str(), key.c_str(), min, max, tmpValue);
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return false;
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}
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value = tmpValue;
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return true;
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}
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bool CConfig::getValue(const std::string §ion, const std::string& key, double &value, double min, double max, double defaultValue) const
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{
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TConfigValue * val = lookupValue(section, key);
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if(val == nullptr || val->m_value.empty()) {
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value = defaultValue;
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return true;
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}
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if(!isFloatingPoint(val->m_value)){
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CLog::logError("Configuration error: %s.%s is not a valid floating point number (%s)", section.c_str(), key.c_str(), val->m_value.c_str());
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return false;
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}
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double tmpValue = std::strtold(val->m_value.c_str(), nullptr);
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if(tmpValue < min || tmpValue > max) {
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CLog::logError("Configuration error: %s.%s is out of range must be between %f and %f, actual %f", section.c_str(), key.c_str(), min, max, tmpValue);
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return false;
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}
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value = tmpValue;
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return true;
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}
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bool CConfig::getValue(const std::string §ion, const std::string& key, unsigned int &value, unsigned int min, unsigned int max, int defaultValue) const
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{
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TConfigValue * val = lookupValue(section, key);
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if(val == nullptr || val->m_value.empty()) {
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value = defaultValue;
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return true;
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}
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if(!isDecimalInteger(val->m_value)){
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CLog::logError("Configuration error: %s.%s is not a valid number (%s)", section.c_str(), key.c_str(), val->m_value.c_str());
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return false;
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}
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unsigned int tmpValue = std::strtol(val->m_value.c_str(), nullptr, 10);
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if(tmpValue < min || tmpValue > max) {
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CLog::logError("Configuration error: %s.%s is out of range must be between %u and %u, actual %u", section.c_str(), key.c_str(), min, max, tmpValue);
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return false;
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}
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value = tmpValue;
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return true;
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}
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bool CConfig::getValue(const std::string §ion, const std::string& key, std::string &value, unsigned int minLen, unsigned int maxLen, const std::string defaultValue) const
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{
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TConfigValue * val = lookupValue(section, key);
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std::string valueTemp = val != nullptr ? val->m_value : defaultValue;
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if(valueTemp.empty() && minLen == 0U)
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valueTemp = defaultValue;
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if(valueTemp.length() < minLen || valueTemp.length() > maxLen) {
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CLog::logError("Configuration error: %s.%s has an invalid length, length must be between %u and %u, actual %u", section.c_str(), key.c_str(), minLen, maxLen, valueTemp.length());
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return false;
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}
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value = valueTemp;
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return true;
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}
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bool CConfig::getValue(const std::string §ion, const std::string& key, unsigned char &value, unsigned char min, unsigned char max,unsigned char defaultValue) const
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{
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unsigned int tempValue;
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bool ret = getValue(section, key, tempValue, (unsigned int)min, (unsigned int)max, (unsigned int) defaultValue);
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if(ret) {
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value = (unsigned char)tempValue;
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}
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return ret;
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}
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bool CConfig::getValue(const std::string §ion, const std::string& key, std::string &value, const std::string defaultValue, const std::vector<std::string>& allowedValues) const
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{
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std::string valueTemp;
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if(getValue(section, key, valueTemp, 0U, 2048, defaultValue)) {
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for(auto s : allowedValues) {
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if(isSameNoCase(s, valueTemp)) {
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value = CUtils::ToLower(valueTemp);
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return true;
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}
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}
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}
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// Build error message
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std::stringstream allowedValuesStreamStr;
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for(auto s : allowedValues) {
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allowedValuesStreamStr << s << ", ";
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}
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// We want nice looking error message, so get rid of trailing ", "
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std::string allowedValuesStr = allowedValuesStreamStr.str();
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allowedValuesStr.resize(allowedValuesStr.length() - 2);
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CLog::logError("Configuration error: %s.%s has an invalid value, valid values are: %s. Actual: %s", section.c_str(), key.c_str(), allowedValuesStr.c_str(), valueTemp.c_str());
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return false;
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}
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TConfigValue * CConfig::lookupValue(const std::string& sectionName, const std::string& key) const
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{
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TConfigValue * res = nullptr;
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std::string sectionNameTemp = sectionName;
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// Make sure we have brackets around section names
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if(sectionNameTemp[0] != '[') sectionNameTemp = "[" + sectionNameTemp;
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if(sectionNameTemp[sectionNameTemp.length() - 1] != ']') sectionNameTemp.push_back(']');
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auto itSection = m_sections.find(sectionNameTemp);
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if(itSection != m_sections.end()) {
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auto itValue = itSection->second->getValues().find(key);
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if(itValue != itSection->second->getValues().end()) {
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res = itValue->second;
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}
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}
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return res;
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}
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@ -0,0 +1,114 @@
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/*
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* Copyright (c) 2021 by Geoffrey Merck F4FXL / KC3FRA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#pragma once
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <cctype>
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#include <cstring>
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#include <cassert>
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#include <vector>
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#define isConfigSection(s)(!s.empty() && s[0] == '[' && s[s.length() - 1] == ']')
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#define isConfigValue(s)(s.find('=') != std::string::npos && s.find('#') > s.find('='))
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#define isSameNoCase(a,b)(strcasecmp(a.c_str(), b.c_str()) == 0)
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#define isDecimalInteger(s)(!s.empty() && (s[0] == '-' || std::isdigit(s[0])) && std::find_if(s.begin(), s.end(), [](unsigned char c) { return !(std::isdigit(c) || c == '-'); }) == s.end())
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#define isFloatingPoint(s)(!s.empty() && (s[0] == '-' || std::isdigit(s[0])) && std::find_if(s.begin(), s.end(), [](unsigned char c) { return !(std::isdigit(c) || c == '-' || c == '.'); }) == s.end())
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// https://www.programmingnotes.org/6504/c-how-to-make-map-unordered-map-keys-case-insensitive-using-c/
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struct case_insensitive_unordered_map {
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struct comp {
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bool operator() (const std::string& lhs, const std::string& rhs) const {
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// On non Windows OS, use the function "strcasecmp" in #include <strings.h>
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return strcasecmp(lhs.c_str(), rhs.c_str()) == 0;
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}
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};
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struct hash {
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std::size_t operator() (std::string str) const {
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for (std::size_t index = 0; index < str.size(); ++index) {
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auto ch = static_cast<unsigned char>(str[index]);
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str[index] = static_cast<unsigned char>(std::tolower(ch));
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}
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return std::hash<std::string>{}(str);
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}
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};
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};
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typedef struct {
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std::string m_key;
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std::string m_value;
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} TConfigValue;
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typedef std::unordered_map<std::string, TConfigValue *, case_insensitive_unordered_map::hash, case_insensitive_unordered_map::comp> CConfigValuesMap;
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class CConfigSection {
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public:
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CConfigSection(const std::string name) :
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m_name(name)
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{
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assert(!name.empty());
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}
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~CConfigSection()
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{
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for(auto it = m_values.begin();it != m_values.end();it++) {
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delete it->second;
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}
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m_values.clear();
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}
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std::string getName() const
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{
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return m_name;
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}
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CConfigValuesMap & getValues()
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{
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return m_values;
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}
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private:
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std::string m_name;
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CConfigValuesMap m_values;
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};
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typedef std::unordered_map<std::string, CConfigSection *, case_insensitive_unordered_map::hash, case_insensitive_unordered_map::comp> CConfigSectionsMap;
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class CConfig
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{
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public:
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CConfig(const std::string filename);
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~CConfig();
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bool load();
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bool getValue(const std::string §ion, const std::string& key, bool &value, bool defaultValue) const;
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bool getValue(const std::string §ion, const std::string& key, int &value, int min, int max, int defaultValue) const;
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bool getValue(const std::string §ion, const std::string& key, double &value, double min, double max, double defaultValue) const;
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bool getValue(const std::string §ion, const std::string& key, unsigned int &value, unsigned int min, unsigned int max,int defaultValue) const;
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bool getValue(const std::string §ion, const std::string& key, unsigned char &value, unsigned char min, unsigned char max,unsigned char defaultValue) const;
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bool getValue(const std::string §ion, const std::string& key, std::string &value, unsigned int minLen, unsigned int maxLen, const std::string defaultValue) const;
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bool getValue(const std::string §ion, const std::string& key, std::string &value, const std::string defaultValue, const std::vector<std::string>& allowedValues) const;
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private:
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void stripComment(std::string& s) const;
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TConfigValue * readKeyAndValue(const std::string s) const;
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TConfigValue * lookupValue(const std::string& section, const std::string& key) const;
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std::string m_filename;
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CConfigSectionsMap m_sections;
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};
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