Merge 5048cf9a15 into 2c92e5b5b3

Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.cpp

@@ -5,40 +5,88 @@
 
 #include <algorithm>
 #include <array>
-#include <cstdlib>
-#include <fcntl.h>
-#include <iostream>
-#include <locale>
+#include <filesystem>
 #include <map>
-#include <sstream>
 #include <string>
-#include <sys/stat.h>
-#include <unistd.h>
+#include <string_view>
 #include <vector>
 
+#include <fcntl.h>
+#include <unistd.h>
+
 #include "Common/FileUtil.h"
+#include "Common/Logging/Log.h"
 #include "Common/StringUtil.h"
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
 
 namespace ciface::Pipes
 {
-static const std::array<std::string, 12> s_button_tokens{
-    {"A", "B", "X", "Y", "Z", "START", "L", "R", "D_UP", "D_DOWN", "D_LEFT", "D_RIGHT"}};
+static constexpr std::array s_button_tokens = {"A", "B", "X",    "Y",      "Z",      "START",
+                                               "L", "R", "D_UP", "D_DOWN", "D_LEFT", "D_RIGHT"};
 
-static const std::array<std::string, 2> s_shoulder_tokens{{"L", "R"}};
+static constexpr std::array s_shoulder_tokens{"L", "R"};
 
-static const std::array<std::string, 2> s_axis_tokens{{"MAIN", "C"}};
+static constexpr std::array s_axis_tokens{"MAIN", "C"};
 
-static double StringToDouble(const std::string& text)
+static double StringToDouble(std::string text)
 {
-  std::istringstream is(text);
-  // ignore current locale
-  is.imbue(std::locale::classic());
-  double result;
-  is >> result;
+  double result = 0;
+  TryParse(text, &result);
   return result;
 }
 
+class PipeDevice : public Core::Device
+{
+public:
+  PipeDevice(int fd, std::string name);
+  ~PipeDevice();
+
+  Core::DeviceRemoval UpdateInput() override;
+  std::string GetName() const override { return m_name; }
+  std::string GetSource() const override { return "Pipe"; }
+
+private:
+  class ButtonInput : public Input
+  {
+  public:
+    ButtonInput(std::string_view name, const bool* value) : m_name(std::move(name)), m_state(*value)
+    {
+    }
+    std::string GetName() const override { return "Button " + std::string{m_name}; }
+    ControlState GetState() const override { return m_state; }
+
+  private:
+    const std::string_view m_name;
+    const bool& m_state;
+  };
+
+  template <int Range>
+  class AnalogInput : public Input
+  {
+  public:
+    AnalogInput(std::string name, const ControlState* value)
+        : m_name(std::move(name)), m_state(*value)
+    {
+    }
+    std::string GetName() const override { return "Axis " + m_name + (Range < 0 ? " -" : " +"); }
+    ControlState GetState() const override { return m_state / Range; }
+
+  private:
+    const std::string m_name;
+    const ControlState& m_state;
+  };
+
+  void AddAxis(std::string name);
+  void ParseCommand(const std::string& command);
+  void SetAxis(const std::string& entry, double value);
+
+  const int m_fd;
+  const std::string m_name;
+  std::string m_buf;
+  std::map<std::string, bool> m_buttons;
+  std::map<std::string, ControlState> m_axes;
+};
+
 class InputBackend final : public ciface::InputBackend
 {
 public:
@@ -53,43 +101,42 @@ std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* co
 
 void InputBackend::PopulateDevices()
 {
-  // Search the Pipes directory for files that we can open in read-only,
-  // non-blocking mode. The device name is the virtual name of the file.
-  File::FSTEntry fst;
-  std::string dir_path = File::GetUserPath(D_PIPES_IDX);
-  if (!File::Exists(dir_path))
-    return;
-  fst = File::ScanDirectoryTree(dir_path, false);
-  if (!fst.isDirectory)
-    return;
-  for (unsigned int i = 0; i < fst.size; ++i)
+  // Search the "Pipes" directory for fifo files that we can open in read-only,
+  // non-blocking mode. The filename becomes the Device name.
+  const std::string& dir_path = File::GetUserPath(D_PIPES_IDX);
+  std::error_code error;
+  for (const auto& dir_entry : std::filesystem::directory_iterator{dir_path, error})
   {
-    const File::FSTEntry& child = fst.children[i];
-    if (child.isDirectory)
+    if (!dir_entry.is_fifo())
       continue;
-    int fd = open(child.physicalName.c_str(), O_RDONLY | O_NONBLOCK);
+
+    const int fd = open(dir_entry.path().c_str(), O_RDONLY | O_NONBLOCK);
     if (fd < 0)
       continue;
-    g_controller_interface.AddDevice(std::make_shared<PipeDevice>(fd, child.virtualName));
+
+    GetControllerInterface().AddDevice(
+        std::make_shared<PipeDevice>(fd, dir_entry.path().filename()));
   }
+
+  if (error)
+    NOTICE_LOG_FMT(CONTROLLERINTERFACE, "Pipes/PopulateDevices: {}", error.message());
 }
 
-PipeDevice::PipeDevice(int fd, const std::string& name) : m_fd(fd), m_name(name)
+PipeDevice::PipeDevice(int fd, std::string name) : m_fd(fd), m_name(std::move(name))
 {
   for (const auto& tok : s_button_tokens)
   {
-    PipeInput* btn = new PipeInput("Button " + tok);
-    AddInput(btn);
-    m_buttons[tok] = btn;
+    auto [iter, inserted] = m_buttons.emplace(tok, false);
+    AddInput(new ButtonInput(tok, &iter->second));
   }
   for (const auto& tok : s_shoulder_tokens)
   {
-    AddAxis(tok, 0.0);
+    AddAxis(tok);
   }
   for (const auto& tok : s_axis_tokens)
   {
-    AddAxis(tok + " X", 0.5);
-    AddAxis(tok + " Y", 0.5);
+    AddAxis(tok + std::string{" X"});
+    AddAxis(tok + std::string{" Y"});
   }
 }
 
@@ -103,7 +150,7 @@ Core::DeviceRemoval PipeDevice::UpdateInput()
   // Read any pending characters off the pipe. If we hit a newline,
   // then dequeue a command off the front of m_buf and parse it.
   char buf[32];
-  ssize_t bytes_read = read(m_fd, buf, sizeof buf);
+  ssize_t bytes_read = read(m_fd, buf, sizeof(buf));
   while (bytes_read > 0)
   {
     m_buf.append(buf, bytes_read);
@@ -120,29 +167,18 @@ Core::DeviceRemoval PipeDevice::UpdateInput()
   return Core::DeviceRemoval::Keep;
 }
 
-void PipeDevice::AddAxis(const std::string& name, double value)
+void PipeDevice::AddAxis(std::string name)
 {
-  // Dolphin uses separate axes for left/right, which complicates things.
-  PipeInput* ax_hi = new PipeInput("Axis " + name + " +");
-  ax_hi->SetState(value);
-  PipeInput* ax_lo = new PipeInput("Axis " + name + " -");
-  ax_lo->SetState(value);
-  m_axes[name + " +"] = ax_hi;
-  m_axes[name + " -"] = ax_lo;
-  AddFullAnalogSurfaceInputs(ax_lo, ax_hi);
+  auto [iter, inserted] = m_axes.emplace(name, 0.0);
+  AddInput(new AnalogInput<-1>(name, &iter->second));
+  AddInput(new AnalogInput<+1>(std::move(name), &iter->second));
 }
 
 void PipeDevice::SetAxis(const std::string& entry, double value)
 {
-  value = std::clamp(value, 0.0, 1.0);
-  double hi = std::max(0.0, value - 0.5) * 2.0;
-  double lo = (0.5 - std::min(0.5, value)) * 2.0;
-  auto search_hi = m_axes.find(entry + " +");
-  if (search_hi != m_axes.end())
-    search_hi->second->SetState(hi);
-  auto search_lo = m_axes.find(entry + " -");
-  if (search_lo != m_axes.end())
-    search_lo->second->SetState(lo);
+  auto search = m_axes.find(entry);
+  if (search != m_axes.end())
+    search->second = std::clamp(value, 0.0, 1.0) * 2.0 - 1.0;
 }
 
 void PipeDevice::ParseCommand(const std::string& command)
@@ -154,14 +190,14 @@ void PipeDevice::ParseCommand(const std::string& command)
   {
     auto search = m_buttons.find(tokens[1]);
     if (search != m_buttons.end())
-      search->second->SetState(tokens[0] == "PRESS" ? 1.0 : 0.0);
+      search->second = tokens[0] == "PRESS";
   }
   else if (tokens[0] == "SET")
   {
     if (tokens.size() == 3)
     {
       double value = StringToDouble(tokens[2]);
-      SetAxis(tokens[1], (value / 2.0) + 0.5);
+      SetAxis(tokens[1], (value + 1.0) / 2.0);
     }
     else if (tokens.size() == 4)
     {

Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.h

@@ -3,10 +3,6 @@
 
 #pragma once
 
-#include <map>
-#include <string>
-#include <vector>
-
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
 
 namespace ciface::Pipes
@@ -23,38 +19,4 @@ namespace ciface::Pipes
 
 std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);
 
-class PipeDevice : public Core::Device
-{
-public:
-  PipeDevice(int fd, const std::string& name);
-  ~PipeDevice();
-
-  Core::DeviceRemoval UpdateInput() override;
-  std::string GetName() const override { return m_name; }
-  std::string GetSource() const override { return "Pipe"; }
-
-private:
-  class PipeInput : public Input
-  {
-  public:
-    PipeInput(const std::string& name) : m_name(name), m_state(0.0) {}
-    std::string GetName() const override { return m_name; }
-    ControlState GetState() const override { return m_state; }
-    void SetState(ControlState state) { m_state = state; }
-
-  private:
-    const std::string m_name;
-    ControlState m_state;
-  };
-
-  void AddAxis(const std::string& name, double value);
-  void ParseCommand(const std::string& command);
-  void SetAxis(const std::string& entry, double value);
-
-  const int m_fd;
-  const std::string m_name;
-  std::string m_buf;
-  std::map<std::string, PipeInput*> m_buttons;
-  std::map<std::string, PipeInput*> m_axes;
-};
 }  // namespace ciface::Pipes