83 lines
1.9 KiB
C++
83 lines
1.9 KiB
C++
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#include "Settings.h"
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static std::string trim(const std::string s)
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{
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size_t start = s.find_first_not_of(" \t\r\n");
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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(std::string filename, 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 == "")
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m_messageName = m_filename;
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m_file.open(m_filename.c_str(), 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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Settings::~Settings(void)
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{
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m_file.close();
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}
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std::string Settings::get(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(std::string key, 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(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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std::istringstream iline;
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iline.str(line);
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iline >> std::skipws;
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std::string variable;
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std::string eq;
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iline >> variable;
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if (variable != key)
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continue;
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found = true;
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iline >> eq;
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if (m_file.fail() || eq != "=") {
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std::ostringstream oss;
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oss << "Error parsing '" << key << "' in file " << m_messageName << " at line " << linenr << " (missing '=')";
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throw std::runtime_error(oss.str());
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}
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if (pvalue) {
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std::string value;
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iline >> value;
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if (m_file.fail()) {
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std::ostringstream oss;
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oss << "Error parsing value for '" << key << "' in file " << m_messageName << " at line " << linenr;
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throw std::runtime_error(oss.str());
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}
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*pvalue = trim(value);
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}
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}
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return found;
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}
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