mirror of
https://github.com/RetroDECK/Supermodel.git
synced 2024-11-26 07:35:40 +00:00
2efe18b525
Removed Ptr_t and ConstPtr_t from public interface, moved config tree builders into their own file, and made them pass by reference and value. Exceptions can be thrown now on lookup failures. Removed s_empty_node -- failed lookups in [] operator create a permanent "hidden" child. Updated comment in NewConfig.cpp.
236 lines
8 KiB
C++
236 lines
8 KiB
C++
#include "Util/NewConfig.h"
|
|
#include "OSD/Logger.h"
|
|
#include "Pkgs/tinyxml2.h"
|
|
#include <algorithm>
|
|
#include <fstream>
|
|
#include <queue>
|
|
#include <cstdlib>
|
|
#include <iostream>
|
|
|
|
namespace Util
|
|
{
|
|
namespace Config
|
|
{
|
|
static void PopulateFromXML(Util::Config::Node *config, const tinyxml2::XMLDocument &xml)
|
|
{
|
|
using namespace tinyxml2;
|
|
std::queue<std::pair<const XMLElement *, Util::Config::Node *>> q;
|
|
|
|
// Push the top level of the XML tree
|
|
for (const XMLElement *e = xml.RootElement(); e != 0; e = e->NextSiblingElement())
|
|
q.push( { e, config } );
|
|
|
|
// Process the elements in order, pushing subsequent levels along with the
|
|
// config nodes to add them to
|
|
while (!q.empty())
|
|
{
|
|
const XMLElement *element = q.front().first;
|
|
Util::Config::Node *parent_node = q.front().second;
|
|
q.pop();
|
|
|
|
// Create a config entry for this XML element
|
|
Util::Config::Node *node = &parent_node->Add(element->Name(), element->GetText() ? std::string(element->GetText()) : std::string());
|
|
|
|
// Create entries for each attribute
|
|
for (const XMLAttribute *a = element->FirstAttribute(); a != 0; a = a->Next())
|
|
node->Add(a->Name(), a->Value());
|
|
|
|
// Push all child elements
|
|
for (const XMLElement *e = element->FirstChildElement(); e != 0; e = e->NextSiblingElement())
|
|
q.push( { e, node } );
|
|
}
|
|
}
|
|
|
|
bool FromXML(Node *config, const std::string &text)
|
|
{
|
|
*config = Node("xml");
|
|
using namespace tinyxml2;
|
|
XMLDocument xml;
|
|
auto ret = xml.Parse(text.c_str());
|
|
if (ret != XML_SUCCESS)
|
|
{
|
|
ErrorLog("Failed to parse XML (%s).", xml.ErrorName());
|
|
return true;
|
|
}
|
|
PopulateFromXML(config, xml);
|
|
return false;
|
|
}
|
|
|
|
bool FromXMLFile(Node *config, const std::string &filename)
|
|
{
|
|
*config = Node("xml");
|
|
using namespace tinyxml2;
|
|
XMLDocument xml;
|
|
auto ret = xml.LoadFile(filename.c_str());
|
|
if (ret != XML_SUCCESS)
|
|
{
|
|
ErrorLog("Failed to parse %s (%s).", filename.c_str(), xml.ErrorName());
|
|
return true;
|
|
}
|
|
PopulateFromXML(config, xml);
|
|
return false;
|
|
}
|
|
|
|
static std::string StripComment(const std::string &line)
|
|
{
|
|
// Find first semicolon not enclosed in ""
|
|
bool inside_quotes = false;
|
|
for (auto it = line.begin(); it != line.end(); ++it)
|
|
{
|
|
inside_quotes ^= (*it == '\"');
|
|
if (!inside_quotes && *it == ';')
|
|
return std::string(line.begin(), it);
|
|
}
|
|
return line;
|
|
}
|
|
|
|
static void ParseAssignment(Node *current_section, const std::string &filename, size_t line_num, const std::string &line)
|
|
{
|
|
size_t idx_equals = line.find_first_of('=');
|
|
if (idx_equals == std::string::npos)
|
|
{
|
|
ErrorLog("%s:%d: Syntax error. No '=' found.", filename.c_str(), line_num);
|
|
return;
|
|
}
|
|
std::string lvalue(TrimWhiteSpace(std::string(line.begin(), line.begin() + idx_equals)));
|
|
if (lvalue.empty())
|
|
{
|
|
ErrorLog("%s:%d: Syntax error. Setting name missing before '='.", filename.c_str(), line_num);
|
|
return;
|
|
}
|
|
// Get rvalue, which is allowed to be empty and strip off quotes if they
|
|
// exist. Only a single pair of quotes encasing the rvalue are permitted.
|
|
std::string rvalue(TrimWhiteSpace(std::string(line.begin() + idx_equals + 1, line.end())));
|
|
size_t idx_first_quote = rvalue.find_first_of('\"');
|
|
size_t idx_last_quote = rvalue.find_last_of('\"');
|
|
if (idx_first_quote == 0 && idx_last_quote == (rvalue.length() - 1) && idx_first_quote != idx_last_quote)
|
|
rvalue = std::string(rvalue.begin() + idx_first_quote + 1, rvalue.begin() + idx_last_quote);
|
|
if (std::count(rvalue.begin(), rvalue.end(), '\"') != 0)
|
|
{
|
|
ErrorLog("%s:%d: Warning: Extraneous quotes present on line.", filename.c_str(), line_num);
|
|
}
|
|
// In INI files, we do not allow multiple settings with the same key. If
|
|
// a setting is specified multiple times, previous ones are overwritten.
|
|
current_section->Set(lvalue, rvalue);
|
|
}
|
|
|
|
bool FromINIFile(Node *config, const std::string &filename)
|
|
{
|
|
std::ifstream file;
|
|
file.open(filename);
|
|
if (file.fail())
|
|
{
|
|
ErrorLog("Unable to open '%s'. Configuration will not be loaded.", filename.c_str());
|
|
return true;
|
|
}
|
|
|
|
*config = Node("Global"); // the root is also the "Global" section
|
|
Node &global = *config;
|
|
Node *current_section = &global;
|
|
|
|
size_t line_num = 1;
|
|
while (!file.eof())
|
|
{
|
|
if (file.fail())
|
|
{
|
|
ErrorLog("%s:%d: File read error. Configuration will be incomplete.");
|
|
return true;
|
|
}
|
|
|
|
std::string line;
|
|
std::getline(file, line);
|
|
line = StripComment(line);
|
|
line = TrimWhiteSpace(line);
|
|
|
|
if (!line.empty())
|
|
{
|
|
if (*line.begin() == '[' && *line.rbegin() == ']')
|
|
{
|
|
// Check if section exists else create a new one
|
|
std::string section(TrimWhiteSpace(std::string(line.begin() + 1, line.begin() + line.length() - 1)));
|
|
if (section.empty() || section == "Global") // empty section names (e.g., "[]") assigned to "[ Global ]"
|
|
current_section = &global;
|
|
else if (!global.TryGet(section))
|
|
{
|
|
Node &new_section = global.Add(section);
|
|
current_section = &new_section;
|
|
}
|
|
else
|
|
current_section = global.TryGet(section);
|
|
}
|
|
else
|
|
{
|
|
ParseAssignment(current_section, filename, line_num, line);
|
|
}
|
|
}
|
|
|
|
line_num++;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Produces a new INI section by merging two existing sections.
|
|
*
|
|
* - Nodes from x and y with children are ignored as per INI semantics.
|
|
* The presence of children indicates a section, not a setting.
|
|
* - Settings from y override settings in x if already present.
|
|
* - If multiple settings with the same key are present in either of the
|
|
* source configs (which technically violates INI semantics), the last
|
|
* ends up being used.
|
|
* - x's key is retained.
|
|
*/
|
|
void MergeINISections(Node *merged, const Node &x, const Node &y)
|
|
{
|
|
*merged = Node(x.Key()); // result has same key as x
|
|
// First copy settings from section x
|
|
for (auto it = x.begin(); it != x.end(); ++it)
|
|
{
|
|
if (it->IsLeaf())
|
|
{
|
|
// INI semantics: take care to only create a single setting per key
|
|
merged->Set(it->Key(), it->GetValue());
|
|
}
|
|
}
|
|
// Merge in settings from section y
|
|
for (auto it = y.begin(); it != y.end(); ++it)
|
|
{
|
|
if (it->IsLeaf() && it->Exists())
|
|
merged->Set(it->Key(), it->GetValue());
|
|
}
|
|
}
|
|
|
|
static void WriteSection(std::ofstream &file, const Node §ion)
|
|
{
|
|
file << "[ " << section.Key() << " ]" << std::endl;
|
|
file << std::endl;
|
|
for (auto it = section.begin(); it != section.end(); ++it)
|
|
{
|
|
if (it->IsLeaf()) //TODO: check if value exists?
|
|
file << it->Key() << " = \"" << it->ValueAs<std::string>() << "\"" << std::endl;
|
|
}
|
|
file << std::endl << std::endl;
|
|
}
|
|
|
|
void WriteINIFile(const std::string &filename, const Node &config, const std::string &header_comment)
|
|
{
|
|
std::ofstream file;
|
|
file.open(filename);
|
|
if (file.fail())
|
|
{
|
|
ErrorLog("Unable to write to '%s'. Configuration will not be saved.");
|
|
return;
|
|
}
|
|
if (!header_comment.empty())
|
|
file << header_comment << std::endl << std::endl;
|
|
WriteSection(file, config);
|
|
for (auto it = config.begin(); it != config.end(); ++it)
|
|
{
|
|
if (it->HasChildren())
|
|
WriteSection(file, *it);
|
|
}
|
|
}
|
|
}
|
|
}
|