New configuration namespace

5 files changed, 653 insertions, 0 deletions

diff --git a/Source/Core/Common/CMakeLists.txt b/Source/Core/Common/CMakeLists.txt
index 5f910a1670..7ed79d07d1 100644
--- a/Source/Core/Common/CMakeLists.txt
+++ b/Source/Core/Common/CMakeLists.txt
@@ -15,6 +15,7 @@ set(SRCS Analytics.cpp
          MsgHandler.cpp
          NandPaths.cpp
          Network.cpp
+         Config.cpp
          PcapFile.cpp
          PerformanceCounter.cpp
          Profiler.cpp
diff --git a/Source/Core/Common/Common.vcxproj b/Source/Core/Common/Common.vcxproj
index 831dcad4a7..047b863443 100644
--- a/Source/Core/Common/Common.vcxproj
+++ b/Source/Core/Common/Common.vcxproj
@@ -123,6 +123,7 @@
     <ClInclude Include="NandPaths.h" />
     <ClInclude Include="Network.h" />
     <ClInclude Include="NonCopyable.h" />
+    <ClInclude Include="Config.h" />
     <ClInclude Include="PcapFile.h" />
     <ClInclude Include="Profiler.h" />
     <ClInclude Include="ScopeGuard.h" />
@@ -172,6 +173,7 @@
     <ClCompile Include="MsgHandler.cpp" />
     <ClCompile Include="NandPaths.cpp" />
     <ClCompile Include="Network.cpp" />
+    <ClCompile Include="Config.cpp" />
     <ClCompile Include="PcapFile.cpp" />
     <ClCompile Include="Profiler.cpp" />
     <ClCompile Include="SDCardUtil.cpp" />
diff --git a/Source/Core/Common/Common.vcxproj.filters b/Source/Core/Common/Common.vcxproj.filters
index 3c9b952742..52625071a4 100644
--- a/Source/Core/Common/Common.vcxproj.filters
+++ b/Source/Core/Common/Common.vcxproj.filters
@@ -53,6 +53,7 @@
     <ClInclude Include="MsgHandler.h" />
     <ClInclude Include="NandPaths.h" />
     <ClInclude Include="Network.h" />
+    <ClInclude Include="Config.h" />
     <ClInclude Include="PcapFile.h" />
     <ClInclude Include="Profiler.h" />
     <ClInclude Include="ScopeGuard.h" />
@@ -245,6 +246,7 @@
     <ClCompile Include="MsgHandler.cpp" />
     <ClCompile Include="NandPaths.cpp" />
     <ClCompile Include="Network.cpp" />
+    <ClCompile Include="Config.cpp" />
     <ClCompile Include="PcapFile.cpp" />
     <ClCompile Include="Profiler.cpp" />
     <ClCompile Include="SDCardUtil.cpp" />
diff --git a/Source/Core/Common/Config.cpp b/Source/Core/Common/Config.cpp
new file mode 100644
index 0000000000..e41f123243
--- /dev/null
+++ b/Source/Core/Common/Config.cpp
@@ -0,0 +1,461 @@
+// Copyright 2016 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <array>
+#include <map>
+
+#include "Common/Assert.h"
+#include "Common/Config.h"
+#include "Common/StringUtil.h"
+
+namespace Config
+{
+const std::string& Section::NULL_STRING = "";
+static Layers s_layers;
+static std::list<ConfigChangedCallback> s_callbacks;
+
+void CallbackSystems();
+
+// Only to be used with the meta-layer
+class RecursiveSection final : public Section
+{
+public:
+  RecursiveSection(LayerType layer, System system, const std::string& name)
+      : Section(layer, system, name)
+  {
+  }
+
+  bool Exists(const std::string& key) const override;
+
+  bool Get(const std::string& key, std::string* value,
+           const std::string& default_value = NULL_STRING) const override;
+
+  void Set(const std::string& key, const std::string& value) override;
+};
+
+bool RecursiveSection::Exists(const std::string& key) const
+{
+  auto layers_it = s_layers.find(LayerType::Meta);
+  do
+  {
+    Section* layer_section = layers_it->second->GetSection(m_system, m_name);
+    if (layer_section && layer_section->Exists(key))
+    {
+      return true;
+    }
+  } while (--layers_it != s_layers.end());
+
+  return false;
+}
+
+bool RecursiveSection::Get(const std::string& key, std::string* value,
+                           const std::string& default_value) const
+{
+  static const std::array<LayerType, 7> search_order = {{
+      // Skip the meta layer
+      LayerType::CurrentRun, LayerType::CommandLine, LayerType::Movie, LayerType::Netplay,
+      LayerType::LocalGame, LayerType::GlobalGame, LayerType::Base,
+  }};
+
+  for (auto layer_id : search_order)
+  {
+    auto layers_it = s_layers.find(layer_id);
+    if (layers_it == s_layers.end())
+      continue;
+
+    Section* layer_section = layers_it->second->GetSection(m_system, m_name);
+    if (layer_section && layer_section->Exists(key))
+    {
+      return layer_section->Get(key, value, default_value);
+    }
+  }
+
+  return Section::Get(key, value, default_value);
+}
+
+void RecursiveSection::Set(const std::string& key, const std::string& value)
+{
+  // The RecursiveSection can't set since it is used to recursively get values from the layer
+  // map.
+  // It is only a part of the meta layer, and the meta layer isn't allowed to set any values.
+  _assert_msg_(COMMON, false, "Don't try to set values here!");
+}
+
+class RecursiveLayer final : public Layer
+{
+public:
+  RecursiveLayer() : Layer(LayerType::Meta) {}
+  Section* GetSection(System system, const std::string& section_name) override;
+  Section* GetOrCreateSection(System system, const std::string& section_name) override;
+};
+
+Section* RecursiveLayer::GetSection(System system, const std::string& section_name)
+{
+  // Always queries backwards recursively, so it doesn't matter if it exists or not on this layer
+  return GetOrCreateSection(system, section_name);
+}
+
+Section* RecursiveLayer::GetOrCreateSection(System system, const std::string& section_name)
+{
+  Section* section = Layer::GetSection(system, section_name);
+  if (!section)
+  {
+    m_sections[system].emplace_back(new RecursiveSection(m_layer, system, section_name));
+    section = m_sections[system].back();
+  }
+  return section;
+}
+
+bool Section::Exists(const std::string& key) const
+{
+  return m_values.find(key) != m_values.end();
+}
+
+bool Section::Delete(const std::string& key)
+{
+  auto it = m_values.find(key);
+  if (it == m_values.end())
+    return false;
+
+  m_values.erase(it);
+  return true;
+}
+
+void Section::Set(const std::string& key, const std::string& value)
+{
+  auto it = m_values.find(key);
+  if (it != m_values.end())
+    it->second = value;
+  else
+    m_values[key] = value;
+}
+
+void Section::Set(const std::string& key, u32 newValue)
+{
+  Section::Set(key, StringFromFormat("0x%08x", newValue));
+}
+
+void Section::Set(const std::string& key, float newValue)
+{
+  Section::Set(key, StringFromFormat("%#.9g", newValue));
+}
+
+void Section::Set(const std::string& key, double newValue)
+{
+  Section::Set(key, StringFromFormat("%#.17g", newValue));
+}
+
+void Section::Set(const std::string& key, int newValue)
+{
+  Section::Set(key, StringFromInt(newValue));
+}
+
+void Section::Set(const std::string& key, bool newValue)
+{
+  Section::Set(key, StringFromBool(newValue));
+}
+
+void Section::Set(const std::string& key, const std::string& newValue,
+                  const std::string& defaultValue)
+{
+  if (newValue != defaultValue)
+    Set(key, newValue);
+  else
+    Delete(key);
+}
+
+bool Section::Get(const std::string& key, std::string* value,
+                  const std::string& default_value) const
+{
+  const auto& it = m_values.find(key);
+  if (it != m_values.end())
+  {
+    *value = it->second;
+    return true;
+  }
+  else if (&default_value != &NULL_STRING)
+  {
+    *value = default_value;
+    return true;
+  }
+
+  return false;
+}
+
+bool Section::Get(const std::string& key, int* value, int defaultValue) const
+{
+  std::string temp;
+  bool retval = Get(key, &temp);
+
+  if (retval && TryParse(temp, value))
+    return true;
+
+  *value = defaultValue;
+  return false;
+}
+
+bool Section::Get(const std::string& key, u32* value, u32 defaultValue) const
+{
+  std::string temp;
+  bool retval = Get(key, &temp);
+
+  if (retval && TryParse(temp, value))
+    return true;
+
+  *value = defaultValue;
+  return false;
+}
+
+bool Section::Get(const std::string& key, bool* value, bool defaultValue) const
+{
+  std::string temp;
+  bool retval = Get(key, &temp);
+
+  if (retval && TryParse(temp, value))
+    return true;
+
+  *value = defaultValue;
+  return false;
+}
+
+bool Section::Get(const std::string& key, float* value, float defaultValue) const
+{
+  std::string temp;
+  bool retval = Get(key, &temp);
+
+  if (retval && TryParse(temp, value))
+    return true;
+
+  *value = defaultValue;
+  return false;
+}
+
+bool Section::Get(const std::string& key, double* value, double defaultValue) const
+{
+  std::string temp;
+  bool retval = Get(key, &temp);
+
+  if (retval && TryParse(temp, value))
+    return true;
+
+  *value = defaultValue;
+  return false;
+}
+
+// Return a list of all lines in a section
+bool Section::GetLines(std::vector<std::string>* lines, const bool remove_comments) const
+{
+  lines->clear();
+
+  for (std::string line : m_lines)
+  {
+    line = StripSpaces(line);
+
+    if (remove_comments)
+    {
+      size_t commentPos = line.find('#');
+      if (commentPos == 0)
+      {
+        continue;
+      }
+
+      if (commentPos != std::string::npos)
+      {
+        line = StripSpaces(line.substr(0, commentPos));
+      }
+    }
+
+    lines->push_back(line);
+  }
+
+  return true;
+}
+
+// Onion layers
+Layer::Layer(std::unique_ptr<ConfigLayerLoader> loader)
+    : m_layer(loader->GetLayer()), m_loader(std::move(loader))
+{
+  Load();
+}
+
+Layer::~Layer()
+{
+  Save();
+}
+
+bool Layer::Exists(System system, const std::string& section_name, const std::string& key)
+{
+  Section* section = GetSection(system, section_name);
+  if (!section)
+    return false;
+  return section->Exists(key);
+}
+
+bool Layer::DeleteKey(System system, const std::string& section_name, const std::string& key)
+{
+  Section* section = GetSection(system, section_name);
+  if (!section)
+    return false;
+  return section->Delete(key);
+}
+
+Section* Layer::GetSection(System system, const std::string& section_name)
+{
+  for (Section* section : m_sections[system])
+    if (!strcasecmp(section->m_name.c_str(), section_name.c_str()))
+      return section;
+  return nullptr;
+}
+
+Section* Layer::GetOrCreateSection(System system, const std::string& section_name)
+{
+  Section* section = GetSection(system, section_name);
+  if (!section)
+  {
+    if (m_layer == LayerType::Meta)
+      m_sections[system].emplace_back(new RecursiveSection(m_layer, system, section_name));
+    else
+      m_sections[system].emplace_back(new Section(m_layer, system, section_name));
+    section = m_sections[system].back();
+  }
+  return section;
+}
+
+void Layer::Load()
+{
+  if (m_loader)
+    m_loader->Load(this);
+  CallbackSystems();
+}
+
+void Layer::Save()
+{
+  if (m_loader)
+    m_loader->Save(this);
+}
+
+Section* GetOrCreateSection(System system, const std::string& section_name)
+{
+  return s_layers[LayerType::Meta]->GetOrCreateSection(system, section_name);
+}
+
+Layers* GetLayers()
+{
+  return &s_layers;
+}
+
+void AddLayer(std::unique_ptr<Layer> layer)
+{
+  s_layers[layer->GetLayer()] = std::move(layer);
+  CallbackSystems();
+}
+
+void AddLayer(std::unique_ptr<ConfigLayerLoader> loader)
+{
+  AddLayer(std::make_unique<Layer>(std::move(loader)));
+}
+
+void AddLoadLayer(std::unique_ptr<Layer> layer)
+{
+  layer->Load();
+  AddLayer(std::move(layer));
+}
+
+void AddLoadLayer(std::unique_ptr<ConfigLayerLoader> loader)
+{
+  AddLoadLayer(std::make_unique<Layer>(std::move(loader)));
+}
+
+Layer* GetLayer(LayerType layer)
+{
+  if (!LayerExists(layer))
+    return nullptr;
+  return s_layers[layer].get();
+}
+
+void RemoveLayer(LayerType layer)
+{
+  s_layers.erase(layer);
+  CallbackSystems();
+}
+bool LayerExists(LayerType layer)
+{
+  return s_layers.find(layer) != s_layers.end();
+}
+
+void AddConfigChangedCallback(ConfigChangedCallback func)
+{
+  s_callbacks.emplace_back(func);
+}
+
+void CallbackSystems()
+{
+  for (const auto& callback : s_callbacks)
+    callback();
+}
+
+// Explicit load and save of layers
+void Load()
+{
+  for (auto& layer : s_layers)
+    layer.second->Load();
+
+  CallbackSystems();
+}
+
+void Save()
+{
+  for (auto& layer : s_layers)
+    layer.second->Save();
+}
+
+void Init()
+{
+  // This layer always has to exist
+  s_layers[LayerType::Meta] = std::make_unique<RecursiveLayer>();
+}
+
+void Shutdown()
+{
+  s_layers.clear();
+  s_callbacks.clear();
+}
+
+static std::map<System, std::string> system_to_name = {
+    {System::Main, "Dolphin"},          {System::GCPad, "GCPad"},  {System::WiiPad, "Wiimote"},
+    {System::GCKeyboard, "GCKeyboard"}, {System::GFX, "Graphics"}, {System::Logger, "Logger"},
+    {System::Debugger, "Debugger"},     {System::UI, "UI"},
+};
+
+const std::string& GetSystemName(System system)
+{
+  return system_to_name[system];
+}
+
+System GetSystemFromName(const std::string& system)
+{
+  for (auto& val : system_to_name)
+    if (val.second == system)
+      return val.first;
+
+  _assert_msg_(COMMON, false, "Programming error! Couldn't convert '%s' to system!",
+               system.c_str());
+  return System::Main;
+}
+
+const std::string& GetLayerName(LayerType layer)
+{
+  static std::map<LayerType, std::string> layer_to_name = {
+      {LayerType::Base, "Base"},
+      {LayerType::GlobalGame, "Global GameINI"},
+      {LayerType::LocalGame, "Local GameINI"},
+      {LayerType::Netplay, "Netplay"},
+      {LayerType::Movie, "Movie"},
+      {LayerType::CommandLine, "Command Line"},
+      {LayerType::CurrentRun, "Current Run"},
+      {LayerType::Meta, "Top"},
+  };
+  return layer_to_name[layer];
+}
+}
diff --git a/Source/Core/Common/Config.h b/Source/Core/Common/Config.h
new file mode 100644
index 0000000000..ac7fb5d6ad
--- /dev/null
+++ b/Source/Core/Common/Config.h
@@ -0,0 +1,187 @@
+// Copyright 2016 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <list>
+#include <map>
+#include <memory>
+#include <string>
+
+// XXX: Purely for case insensitive compare
+#include "Common/IniFile.h"
+
+namespace Config
+{
+enum class LayerType
+{
+  Base,
+  GlobalGame,
+  LocalGame,
+  Movie,
+  Netplay,
+  CommandLine,
+  CurrentRun,
+  Meta,
+};
+
+enum class System
+{
+  Main,
+  GCPad,
+  WiiPad,
+  GCKeyboard,
+  GFX,
+  Logger,
+  Debugger,
+  UI,
+};
+
+class Section;
+class Layer;
+class ConfigLayerLoader;
+
+using SectionValueMap = std::map<std::string, std::string, CaseInsensitiveStringCompare>;
+using LayerMap = std::map<System, std::list<Section*>>;
+using Layers = std::map<LayerType, std::unique_ptr<Layer>>;
+using ConfigChangedCallback = std::function<void()>;
+
+class Section
+{
+  friend Layer;
+  friend ConfigLayerLoader;
+
+public:
+  Section(LayerType layer, System system, const std::string& name)
+      : m_layer(layer), m_system(system), m_name(name)
+  {
+  }
+
+  virtual bool Exists(const std::string& key) const;
+  bool Delete(const std::string& key);
+
+  // Setters
+  virtual void Set(const std::string& key, const std::string& value);
+
+  void Set(const std::string& key, u32 newValue);
+  void Set(const std::string& key, float newValue);
+  void Set(const std::string& key, double newValue);
+  void Set(const std::string& key, int newValue);
+  void Set(const std::string& key, bool newValue);
+
+  // Setters with default values
+  void Set(const std::string& key, const std::string& newValue, const std::string& defaultValue);
+  template <typename T>
+  void Set(const std::string& key, T newValue, const T defaultValue)
+  {
+    if (newValue != defaultValue)
+      Set(key, newValue);
+    else
+      Delete(key);
+  }
+
+  // Getters
+  virtual bool Get(const std::string& key, std::string* value,
+                   const std::string& default_value = NULL_STRING) const;
+
+  bool Get(const std::string& key, int* value, int defaultValue = 0) const;
+  bool Get(const std::string& key, u32* value, u32 defaultValue = 0) const;
+  bool Get(const std::string& key, bool* value, bool defaultValue = false) const;
+  bool Get(const std::string& key, float* value, float defaultValue = 0.0f) const;
+  bool Get(const std::string& key, double* value, double defaultValue = 0.0) const;
+
+  // Section chunk
+  void SetLines(const std::vector<std::string>& lines) { m_lines = lines; }
+  // XXX: Add to recursive layer
+  virtual bool GetLines(std::vector<std::string>* lines, const bool remove_comments = true) const;
+  virtual bool HasLines() const { return m_lines.size() > 0; }
+  const std::string& GetName() const { return m_name; }
+  const SectionValueMap& GetValues() const { return m_values; }
+protected:
+  LayerType m_layer;
+  System m_system;
+  const std::string m_name;
+  static const std::string& NULL_STRING;
+
+  SectionValueMap m_values;
+
+  std::vector<std::string> m_lines;
+};
+
+// XXX: Allow easy migration!
+class ConfigLayerLoader
+{
+public:
+  ConfigLayerLoader(LayerType layer) : m_layer(layer) {}
+  ~ConfigLayerLoader() {}
+  virtual void Load(Layer* config_layer) = 0;
+  virtual void Save(Layer* config_layer) = 0;
+
+  LayerType GetLayer() const { return m_layer; }
+private:
+  const LayerType m_layer;
+};
+
+class Layer
+{
+public:
+  explicit Layer(LayerType layer) : m_layer(layer) {}
+  Layer(std::unique_ptr<ConfigLayerLoader> loader);
+  virtual ~Layer();
+
+  // Convenience functions
+  bool Exists(System system, const std::string& section_name, const std::string& key);
+  bool DeleteKey(System system, const std::string& section_name, const std::string& key);
+  template <typename T>
+  bool GetIfExists(System system, const std::string& section_name, const std::string& key, T* value)
+  {
+    if (Exists(system, section_name, key))
+      return GetOrCreateSection(system, section_name)->Get(key, value);
+
+    return false;
+  }
+
+  virtual Section* GetSection(System system, const std::string& section_name);
+  virtual Section* GetOrCreateSection(System system, const std::string& section_name);
+
+  // Explicit load and save of layers
+  void Load();
+  void Save();
+
+  LayerType GetLayer() const { return m_layer; }
+  const LayerMap& GetLayerMap() { return m_sections; }
+  // Stay away from this routine as much as possible
+  ConfigLayerLoader* GetLoader() { return m_loader.get(); }
+protected:
+  LayerMap m_sections;
+  const LayerType m_layer;
+  std::unique_ptr<ConfigLayerLoader> m_loader;
+};
+
+// Common function used for getting configuration
+Section* GetOrCreateSection(System system, const std::string& section_name);
+
+// Layer management
+Layers* GetLayers();
+void AddLayer(std::unique_ptr<Layer> layer);
+void AddLayer(std::unique_ptr<ConfigLayerLoader> loader);
+void AddLoadLayer(std::unique_ptr<Layer> layer);
+void AddLoadLayer(std::unique_ptr<ConfigLayerLoader> loader);
+Layer* GetLayer(LayerType layer);
+void RemoveLayer(LayerType layer);
+bool LayerExists(LayerType layer);
+
+void AddConfigChangedCallback(ConfigChangedCallback func);
+
+// Explicit load and save of layers
+void Load();
+void Save();
+
+void Init();
+void Shutdown();
+
+const std::string& GetSystemName(System system);
+System GetSystemFromName(const std::string& system);
+const std::string& GetLayerName(LayerType layer);
+}