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config.cpp
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config.cpp
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#include "config.h"
#include <filesystem>
config::config(const std::string& filename)
{
load(filename);
}
bool config::load(const std::string& filename)
{
//char linebuff[0x200]{ 0 };
std::ifstream file(filename);
if (!file)
return false;
std::string current_section, filestring;
size_t filesize = std::filesystem::file_size(filename);
filestring.resize(filesize);
file.read(filestring.data(), filesize);
*(filestring.end() - 1) = 0;
size_t off = 0;
std::string key;
while (getline(filestring, off, key))
{
if (is_annotation(key) || is_empty(key))
continue;
remove_annotation(key);
if (is_section(key))
{
current_section = key;
convert_section_name(current_section);
_config[current_section] = section_type();
continue;
}
std::string right = split(key);
value_type values = split_values(right);
if (values.empty() || key.empty())
continue;
_config[current_section][key] = values;
}
return is_loaded();
}
bool config::is_loaded()
{
return !_config.empty();
}
void config::clear()
{
_config.clear();
}
config::section_type config::operator[](const std::string& name)
{
return section(name);
}
config::section_type config::section(const std::string& name)
{
section_type section;
config_type::const_iterator iter = _config.find(name);
if (iter == _config.end())
return section;
return iter->second;
}
config::value_type config::value(const std::string& secname, const std::string& key)
{
value_type values;
section_type sec = section(secname);
if (sec.empty())
return values;
section_type::const_iterator iter = sec.find(key);
if (iter == sec.end())
return values;
return iter->second;
}
std::vector<int> config::value_as_int(const std::string& section, const std::string& key)
{
std::vector<int> ret;
value_type values = value(section, key);
ret.resize(values.size());
for (size_t i = 0; i < ret.size(); i++)
{
ret[i] = atoi(values[i].c_str());
}
return ret;
}
std::vector<bool> config::value_as_bool(const std::string& section, const std::string& key, bool def)
{
std::vector<bool> ret;
value_type values = value(section, key);
for (std::string value : values)
{
char first = std::toupper(value.front());
if (first == 'T' || first == 'Y' || first == '1')
ret.push_back(true);
else if (first == 'F' || first == 'N' || first == '0')
ret.push_back(false);
else
ret.push_back(def);
}
return ret;
}
std::vector<std::string> config::value_as_strings(const std::string& section, const std::string& key)
{
return value(section, key);
}
int config::read_int(const std::string& section, const std::string& key, int def)
{
std::vector<int> values = value_as_int(section, key);
if (values.empty())
return def;
return values.front();
}
bool config::read_bool(const std::string& section, const std::string& key, bool def)
{
std::vector<bool> values = value_as_bool(section, key, def);
if (values.empty())
return def;
return values.front();
}
std::string config::read_string(const std::string& section, const std::string& key, std::string def)
{
value_type values = value(section, key);
if (values.empty() || values.front().empty())
return def;
return values.front();
}
void config::trim(std::string& string, const char* filter)
{
string.erase(0, string.find_first_not_of(filter));
string.erase(string.find_last_not_of(filter) + 1);//std::string::npos + 1 == 0;
string.erase(string.find_last_not_of('\0') + 1);//std::string::npos + 1 == 0;
}
void config::remove_annotation(std::string& string)
{
if (string.find(';') != string.npos)
string.erase(string.find(';'));
if (string.find("//") != string.npos)
string.erase(string.find("//"));
}
std::string config::split(std::string& string, char delim)
{
std::string right;
if (string.find(delim) != string.npos)
{
right = string;
string.erase(string.find(delim));
trim(string);
right.erase(0, right.find(delim) + 1);
trim(right);
}
return right;
}
config::value_type config::split_values(const std::string& string)
{
std::vector<std::string> values;
std::string current;
size_t current_off;
size_t string_off;
string_off = 0;
current_off = string.find(',');
current.assign(string, string_off, current_off);
trim(current);
while (!current.empty())
{
values.push_back(current);
if (current_off == std::string::npos)
break;
string_off = current_off + 1;
current_off = string.find(',', current_off + 1);
current.assign(string, string_off, current_off - string_off);
trim(current);
}
return values;
}
bool config::is_section(const std::string& string)
{
std::string copy = string;
trim(copy);
return !copy.empty() && copy.front() == '[' && copy.back() == ']' && copy.find(';') == std::string::npos;
}
bool config::is_empty(const std::string string)
{
std::string copy = string;
trim(copy);
return copy.empty();
}
void config::convert_section_name(std::string& string)
{
trim(string, " \t\r\n;[]");
}
bool config::is_annotation(const std::string& string)
{
std::string copy = string;
trim(copy, " \t\r\n");
return !copy.empty() && (copy.front() == ';' || copy.substr(0, 2) == "//");
}
bool config::getline(const std::string& filestring, size_t& off, std::string& result)
{
if (filestring.length() <= off)
return false;
if (size_t retpos = filestring.find('\n', off); retpos != filestring.npos) {
result.assign(filestring.begin() + off, filestring.begin() + retpos);
off = retpos + 1;
return true;
}
else
{
result.assign(filestring.begin() + off, filestring.end());
off = filestring.npos;
return !result.empty();
}
return false;
}