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// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria, Aaron Giles
/***************************************************************************
config.cpp
Configuration file I/O.
***************************************************************************/
#include "emu.h"
#include "config.h"
#include "drivenum.h"
#include "emuopts.h"
#include "fileio.h"
#include "xmlfile.h"
#include <system_error>
#include <utility>
#define DEBUG_CONFIG 0
//**************************************************************************
// CONFIGURATION MANAGER
//**************************************************************************
/*************************************
*
* Construction/destruction
*
*************************************/
configuration_manager::configuration_manager(running_machine &machine) :
m_machine(machine),
m_typelist()
{
}
configuration_manager::~configuration_manager()
{
}
/*************************************
*
* Register to be involved in config
* save/load
*
*************************************/
void configuration_manager::config_register(std::string_view name, load_delegate &&load, save_delegate &&save)
{
m_typelist.emplace(name, config_handler{ std::move(load), std::move(save) });
}
/*************************************
*
* Settings save/load frontend
*
*************************************/
bool configuration_manager::load_settings()
{
// loop over all registrants and call their init function
for (auto const &type : m_typelist)
type.second.load(config_type::INIT, config_level::DEFAULT, nullptr);
// now load the controller file
char const *const controller = machine().options().ctrlr();
if (controller && *controller)
{
emu_file file(machine().options().ctrlr_path(), OPEN_FLAG_READ);
if (!attempt_load(machine().system(), file, std::string(controller) + ".cfg", config_type::CONTROLLER))
throw emu_fatalerror("Could not load controller configuration file %s.cfg", controller);
}
// next load the defaults file
emu_file file(machine().options().cfg_directory(), OPEN_FLAG_READ);
attempt_load(machine().system(), file, "default.cfg", config_type::DEFAULT);
// load the system-specific file
bool const loaded = attempt_load(machine().system(), file, machine().basename() + ".cfg", config_type::SYSTEM);
// loop over all registrants and call their final function
for (auto const &type : m_typelist)
type.second.load(config_type::FINAL, config_level::DEFAULT, nullptr);
// if we didn't find a saved config, return false so the main core knows that it
// is the first time the system has been run
return loaded;
}
void configuration_manager::save_settings()
{
// loop over all registrants and call their init function
for (auto const &type : m_typelist)
type.second.save(config_type::INIT, nullptr);
// save the defaults file
emu_file file(machine().options().cfg_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
std::error_condition filerr = file.open("default.cfg");
if (!filerr)
save_xml(file, config_type::DEFAULT);
// finally, save the system-specific file
filerr = file.open(machine().basename() + ".cfg");
if (!filerr)
save_xml(file, config_type::SYSTEM);
// loop over all registrants and call their final function
for (auto const &type : m_typelist)
type.second.save(config_type::FINAL, nullptr);
}
/*************************************
*
* XML file load
*
*************************************/
bool configuration_manager::attempt_load(game_driver const &system, emu_file &file, std::string_view name, config_type which_type)
{
std::error_condition const filerr = file.open(std::string(name));
if (std::errc::no_such_file_or_directory == filerr)
{
osd_printf_verbose("Configuration file %s not found\n", name);
return false;
}
else if (filerr)
{
osd_printf_warning(
"Error opening configuration file %s (%s:%d %s)\n",
name,
filerr.category().name(),
filerr.value(),
filerr.message());
return false;
}
else
{
osd_printf_verbose("Attempting to parse: %s\n", name);
return load_xml(system, file, which_type);
}
}
bool configuration_manager::load_xml(game_driver const &system, emu_file &file, config_type which_type)
{
// read the file
util::xml::file::ptr const root(util::xml::file::read(file, nullptr));
if (!root)
{
osd_printf_warning("Error parsing XML configuration file %s\n", file.filename());
return false;
}
// find the config node
util::xml::data_node const *const confignode = root->get_child("mameconfig");
if (!confignode)
{
osd_printf_warning("Could not find root mameconfig element in configuration file %s\n", file.filename());
return false;
}
// validate the config data version
int const version = confignode->get_attribute_int("version", 0);
if (version != CONFIG_VERSION)
{
osd_printf_warning("Configuration file %s has unsupported version %d\n", file.filename(), version);
return false;
}
// strip off all the path crap from the source filename
char const *srcfile = strrchr(system.type.source(), '/');
if (!srcfile)
srcfile = strrchr(system.type.source(), '\\');
if (!srcfile)
srcfile = strrchr(system.type.source(), ':');
if (!srcfile)
srcfile = system.type.source();
else
srcfile++;
// loop over all system nodes in the file
int count = 0;
for (util::xml::data_node const *systemnode = confignode->get_child("system"); systemnode; systemnode = systemnode->get_next_sibling("system"))
{
// look up the name of the system here; skip if none
char const *name = systemnode->get_attribute_string("name", "");
// based on the file type, determine whether we have a match
config_level level = config_level::DEFAULT;
switch (which_type)
{
case config_type::SYSTEM:
// only match on the specific system name
if (strcmp(name, system.name))
{
osd_printf_verbose("Ignoring configuration for system %s in system configuration file %s\n", name, file.filename());
continue;
}
level = config_level::SYSTEM;
break;
case config_type::DEFAULT:
// only match on default
if (strcmp(name, "default"))
{
osd_printf_verbose("Ignoring configuration for system %s in default configuration file %s\n", name, file.filename());
continue;
}
level = config_level::DEFAULT;
break;
case config_type::CONTROLLER:
{
// match on: default, system name, source file name, parent name, grandparent name
int clone_of;
if (!strcmp(name, "default"))
{
osd_printf_verbose("Applying default configuration from controller configuration file %s\n", file.filename());
level = config_level::DEFAULT;
}
else if (!strcmp(name, system.name))
{
osd_printf_verbose("Applying configuration for system %s from controller configuration file %s\n", name, file.filename());
level = config_level::SYSTEM;
}
else if (!strcmp(name, srcfile))
{
osd_printf_verbose("Applying configuration for source file %s from controller configuration file %s\n", name, file.filename());
level = config_level::SOURCE;
}
else if (
((clone_of = driver_list::clone(system)) != -1 && !strcmp(name, driver_list::driver(clone_of).name)) ||
(clone_of != -1 && ((clone_of = driver_list::clone(clone_of)) != -1) && !strcmp(name, driver_list::driver(clone_of).name)))
{
osd_printf_verbose("Applying configuration for parent/BIOS %s from controller configuration file %s\n", name, file.filename());
level = (driver_list::driver(clone_of).flags & MACHINE_IS_BIOS_ROOT) ? config_level::BIOS : config_level::PARENT;
}
else
{
continue;
}
break;
}
default:
break;
}
// log that we are processing this entry
if (DEBUG_CONFIG)
osd_printf_debug("Entry: %s -- processing\n", name);
// loop over all registrants and call their load function
for (auto const &type : m_typelist)
type.second.load(which_type, level, systemnode->get_child(type.first.c_str()));
count++;
// save unhandled settings for default and system types
if (config_type::DEFAULT == which_type)
save_unhandled(m_unhandled_default, *systemnode);
else if (config_type::SYSTEM == which_type)
save_unhandled(m_unhandled_system, *systemnode);
}
// error if this isn't a valid match
return count != 0;
}
/*************************************
*
* XML file save
*
*************************************/
bool configuration_manager::save_xml(emu_file &file, config_type which_type)
{
// if we cant't create a root node, bail
util::xml::file::ptr root(util::xml::file::create());
if (!root)
return false;
// create a config node
util::xml::data_node *const confignode = root->add_child("mameconfig", nullptr);
if (!confignode)
return false;
confignode->set_attribute_int("version", CONFIG_VERSION);
// create a system node
util::xml::data_node *const systemnode = confignode->add_child("system", nullptr);
if (!systemnode)
return false;
systemnode->set_attribute("name", (which_type == config_type::DEFAULT) ? "default" : machine().system().name);
// loop over all registrants and call their save function
util::xml::data_node *curnode = nullptr;
for (auto const &type : m_typelist)
{
if (!curnode || (type.first != curnode->get_name()))
curnode = systemnode->add_child(type.first.c_str(), nullptr);
if (!curnode)
return false;
type.second.save(which_type, curnode);
// if nothing was added, just nuke the node
if (!curnode->get_value() && !curnode->get_first_child() && !curnode->count_attributes())
{
curnode->delete_node();
curnode = nullptr;
}
}
// restore unhandled settings
if ((config_type::DEFAULT == which_type) && m_unhandled_default)
restore_unhandled(*m_unhandled_default, *systemnode);
else if ((config_type::SYSTEM == which_type) && m_unhandled_system)
restore_unhandled(*m_unhandled_system, *systemnode);
// write out the file
root->write(file);
// free and get out of here
return true;
}
/*************************************
*
* Preserving unhandled settings
*
*************************************/
void configuration_manager::save_unhandled(
std::unique_ptr<util::xml::file> &unhandled,
util::xml::data_node const &systemnode)
{
for (util::xml::data_node const *curnode = systemnode.get_first_child(); curnode; curnode = curnode->get_next_sibling())
{
auto const handler = m_typelist.lower_bound(curnode->get_name());
if ((m_typelist.end() == handler) || (handler->first != curnode->get_name()))
{
if (!unhandled)
unhandled = util::xml::file::create();
curnode->copy_into(*unhandled);
}
}
}
void configuration_manager::restore_unhandled(
util::xml::file const &unhandled,
util::xml::data_node &systemnode)
{
for (util::xml::data_node const *curnode = unhandled.get_first_child(); curnode; curnode = curnode->get_next_sibling())
curnode->copy_into(systemnode);
}
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