63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
#include "Settings.h"
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#include <iostream>
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static std::string trim(const std::string &s)
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{
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const size_t start = s.find_first_not_of(" \t\r\n");
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const size_t end = s.find_last_not_of(" \t\r\n");
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return s.substr(start, (end - start + 1));
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}
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Settings::Settings(const std::string &filename, const std::string &msgName)
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: m_filename(filename),
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m_messageName(msgName)
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{
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if (m_messageName.empty())
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m_messageName = m_filename;
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m_file.open(m_filename, std::ifstream::in);
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if (!m_file.is_open())
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throw std::runtime_error(std::string("Failed to open file '") + m_messageName + "'");
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}
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std::string Settings::get(const std::string &key)
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{
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std::string value;
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if (getGeneric(key, &value))
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return value;
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else
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throw std::runtime_error(std::string("Failed to read key '") + key + "' from file '" + m_messageName + "'");
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}
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std::string Settings::get(const std::string &key, const std::string &defaultValue)
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{
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std::string value;
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if (getGeneric(key, &value))
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return value;
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else
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return defaultValue;
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}
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bool Settings::getGeneric(const std::string &key, std::string *pvalue)
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{
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std::string line;
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int linenr = 0;
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bool found = false;
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m_file.clear();
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m_file.seekg(0);
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for (std::getline(m_file, line); m_file.good(); std::getline(m_file, line)) {
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linenr++;
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const size_t keylen = line.find_first_of('=');
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if (keylen == std::string::npos) {
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std::cerr << "Error parsing config line at " << m_filename << ":" << linenr << ": expected: <name> = <value> ('=' not found)";
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continue;
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}
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if (trim(line.substr(0, keylen)) != key)
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continue;
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found = true;
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if (pvalue)
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*pvalue = trim(line.substr(keylen + 1));
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}
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return found;
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}
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