update rest

grapher is still broken

refactored io / error handling a bit

18 files changed, 508 insertions, 498 deletions

diff --git a/common/common.vcxitems b/common/common.vcxitems
index 4cbe2b7..6d1b861 100644
--- a/common/common.vcxitems
+++ b/common/common.vcxitems
@@ -26,6 +26,7 @@
     <ClInclude Include="$(MSBuildThisFileDirectory)rawaccel-io-def.h" />
     <ClInclude Include="$(MSBuildThisFileDirectory)rawaccel-io.hpp" />
     <ClInclude Include="$(MSBuildThisFileDirectory)rawaccel-base.hpp" />
+    <ClInclude Include="$(MSBuildThisFileDirectory)rawaccel-validate.hpp" />
     <ClInclude Include="$(MSBuildThisFileDirectory)rawaccel-version.h" />
     <ClInclude Include="$(MSBuildThisFileDirectory)rawaccel.hpp" />
     <ClInclude Include="$(MSBuildThisFileDirectory)utility-install.hpp" />
diff --git a/common/rawaccel-error.hpp b/common/rawaccel-error.hpp
index cdbe1e5..a9cb7b8 100644
--- a/common/rawaccel-error.hpp
+++ b/common/rawaccel-error.hpp
@@ -1,11 +1,12 @@
 #pragma once
 
-#include <stdexcept>
+#include <system_error>
+#include <string>
 
 namespace rawaccel {
 
-	class error : public std::runtime_error { 
-		using std::runtime_error::runtime_error; 
+	class error : public std::runtime_error {
+		using std::runtime_error::runtime_error;
 	};
 
 	class io_error : public error {
@@ -14,7 +15,25 @@ namespace rawaccel {
 
 	class install_error : public io_error {
 	public:
-		install_error() : io_error("Raw Accel driver is not installed, run installer.exe") {}
+		install_error() :
+			io_error("Raw Accel is not installed, run installer.exe") {}
+	};
+
+	class sys_error : public io_error {
+	public:
+		sys_error(const char* msg, DWORD code = GetLastError()) :
+			io_error(build_msg(code, msg)) {}
+
+		static std::string build_msg(DWORD code, const char* msg) 
+		{
+			std::string ret = 
+				std::system_error(code, std::system_category(), msg).what();
+			ret += " (";
+			ret += std::to_string(code);
+			ret += ")";
+			return ret;
+		}
+
 	};
 
 }
diff --git a/common/rawaccel-io-def.h b/common/rawaccel-io-def.h
index e169390..399e0f2 100644
--- a/common/rawaccel-io-def.h
+++ b/common/rawaccel-io-def.h
@@ -1,9 +1,11 @@
 #pragma once
 
+#define NOMINMAX
+
 #ifdef _KERNEL_MODE
 #include <ntddk.h>
 #else
-#include <winioctl.h>
+#include <Windows.h>
 #endif
 
 #define RA_DEV_TYPE 0x8888u
diff --git a/common/rawaccel-io.hpp b/common/rawaccel-io.hpp
index da496fa..a80e254 100644
--- a/common/rawaccel-io.hpp
+++ b/common/rawaccel-io.hpp
@@ -1,67 +1,84 @@
 #pragma once
 
 #include "rawaccel-io-def.h"
-#include "rawaccel.hpp"
 #include "rawaccel-version.h"
 #include "rawaccel-error.hpp"
-
-#define NOMINMAX
-#define WIN32_LEAN_AND_MEAN
-#include <Windows.h>
-
-#include <system_error>
+#include "rawaccel.hpp"
 
 #pragma warning(push)
 #pragma warning(disable:4245) // int -> DWORD conversion while passing CTL_CODE
 
 namespace rawaccel {
 
-	inline void io_control(DWORD code, void* in, DWORD in_size, void* out, DWORD out_size) 
-	{
-		HANDLE ra_handle = INVALID_HANDLE_VALUE;
-
-		ra_handle = CreateFileW(L"\\\\.\\rawaccel", 0, 0, 0, OPEN_EXISTING, 0, 0);
-
-		if (ra_handle == INVALID_HANDLE_VALUE) {
-			throw install_error();
-		}
-
-		DWORD dummy;
-
-		BOOL success = DeviceIoControl(
-			ra_handle,
-			code,
-			in,
-			in_size,
-			out,
-			out_size,
-			&dummy,  // bytes returned
-			NULL     // overlapped structure
-		);
-
-		CloseHandle(ra_handle);
-
-		if (!success) {
-			throw std::system_error(GetLastError(), std::system_category(), "DeviceIoControl failed");
-		}
-	}
-
-	inline void read(io_t& args)
-	{
-		io_control(RA_READ, NULL, 0, &args, sizeof(io_t));
-	}
-
-	inline void write(const io_t& args) 
-	{
-		io_control(RA_WRITE, const_cast<io_t*>(&args), sizeof(io_t), NULL, 0);
-	}
-
-	inline version_t get_version() 
-	{
-		version_t ver;
-		io_control(RA_GET_VERSION, NULL, 0, &ver, sizeof(version_t));
-		return ver;
-	}
+    inline void io_control(DWORD code, void* in, DWORD in_size, void* out, DWORD out_size) 
+    {
+        HANDLE ra_handle = INVALID_HANDLE_VALUE;
+
+        ra_handle = CreateFileW(L"\\\\.\\rawaccel", 0, 0, 0, OPEN_EXISTING, 0, 0);
+
+        if (ra_handle == INVALID_HANDLE_VALUE) {
+            throw install_error();
+        }
+
+        DWORD dummy;
+
+        BOOL success = DeviceIoControl(
+            ra_handle,
+            code,
+            in,
+            in_size,
+            out,
+            out_size,
+            &dummy,  // bytes returned
+            NULL     // overlapped structure
+        );
+
+        CloseHandle(ra_handle);
+
+        if (!success) {
+            throw sys_error("DeviceIoControl failed");
+        }
+    }
+
+    inline void read(io_t& args)
+    {
+        io_control(RA_READ, NULL, 0, &args, sizeof(io_t));
+    }
+
+    inline void write(const io_t& args) 
+    {
+        io_control(RA_WRITE, const_cast<io_t*>(&args), sizeof(io_t), NULL, 0);
+    }
+
+    inline version_t get_version() 
+    {
+        version_t v;
+
+        try {
+            io_control(RA_GET_VERSION, NULL, 0, &v, sizeof(version_t));
+        }
+        catch (const sys_error&) {
+            // assume request is not implemented (< 1.3)
+            v = { 0 }; 
+        }
+
+        return v;
+    }
+
+    inline version_t valid_version_or_throw()
+    {
+        auto v = get_version();
+
+        if (v < min_driver_version) {
+            throw error("reinstallation required");
+        }
+
+        if (version < v) {
+            throw error("newer driver is installed");
+        }
+
+        return v;
+    }
 
 }
 
diff --git a/common/rawaccel-validate.hpp b/common/rawaccel-validate.hpp
new file mode 100644
index 0000000..b9ee2af
--- /dev/null
+++ b/common/rawaccel-validate.hpp
@@ -0,0 +1,168 @@
+#pragma once
+
+#include "rawaccel-base.hpp"
+#include "utility.hpp"
+
+namespace rawaccel {
+
+	struct valid_ret_t {
+		int count_x = 0;
+		int count_y = 0;
+		int count = 0;
+
+		explicit operator bool() const
+		{
+			return count == 0;
+		}
+	};
+
+	template <typename MsgHandler = noop>
+	valid_ret_t valid(const settings& args, MsgHandler fn = {})
+	{
+		valid_ret_t ret;
+
+		auto error = [&](auto msg) {
+			++ret.count;
+			fn(msg);
+		};
+
+		auto check_accel = [&error](const accel_args& args) {
+			static_assert(LUT_CAPACITY == 1025, "update error msg");
+
+			const auto& lut_args = args.lut_args;
+
+			if (lut_args.partitions <= 0) {
+				error("lut partitions"" must be positive");
+			}
+
+			if (lut_args.mode == table_mode::linear) {
+				if (lut_args.start <= 0) {
+					error("start"" must be positive");
+				}
+
+				if (lut_args.stop <= lut_args.start) {
+					error("stop must be greater than start");
+				}
+
+				if (lut_args.num_elements < 2 || 
+					lut_args.num_elements > 1025) {
+					error("num must be between 2 and 1025");
+				}
+			}
+			else if (lut_args.mode == table_mode::binlog) {
+				int istart = static_cast<int>(lut_args.start);
+				int istop = static_cast<int>(lut_args.stop);
+
+				if (lut_args.start < -99) {
+					error("start is too small");
+				}
+				else if (lut_args.stop > 99) {
+					error("stop is too large");
+				}
+				else if (istart != lut_args.start || istop != lut_args.stop) {
+					error("start and stop must be integers");
+				}
+				else if (istop <= istart) {
+					error("stop must be greater than start");
+				}
+				else if (lut_args.num_elements <= 0) {
+					error("num"" must be positive");
+				}
+				else if (((lut_args.stop - lut_args.start) * lut_args.num_elements) >= 1025) {
+					error("binlog mode requires (num * (stop - start)) < 1025");
+				}
+			}
+
+			if (args.offset < 0) {
+				error("offset can not be negative");
+			}
+
+			if (args.cap <= 0) {
+				error("cap"" must be positive");
+			}
+
+			if (args.accel_motivity <= 0 ||
+				args.accel_natural <= 0 ||
+				args.accel_classic <= 0) {
+				error("acceleration"" must be positive");
+			}
+
+			if (args.motivity <= 1) {
+				error("motivity must be greater than 1");
+			}
+
+			if (args.power <= 1) {
+				error("power must be greater than 1");
+			}
+
+			if (args.scale <= 0) {
+				error("scale"" must be positive");
+			}
+
+			if (args.weight <= 0) {
+				error("weight"" must be positive");
+			}
+
+			if (args.exponent <= 0) {
+				error("exponent"" must be positive");
+			}
+
+			if (args.limit <= 0) {
+				error("limit"" must be positive");
+			}
+
+			if (args.midpoint <= 0) {
+				error("midpoint"" must be positive");
+			}
+
+			if (args.smooth < 0 || args.smooth > 1) {
+				error("smooth must be between 0 and 1");
+			}
+
+		};
+
+		check_accel(args.argsv.x);
+
+		if (!args.combine_mags) {
+			ret.count_x = ret.count;
+			check_accel(args.argsv.y);
+			ret.count_y = ret.count;
+		}
+
+		if (args.dpi <= 0) {
+			error("dpi"" must be positive");
+		}
+
+		if (args.speed_cap <= 0) {
+			error("speed cap"" must be positive");
+		}
+
+		if (args.sens.x == 0 || args.sens.y == 0) {
+			error("sens multiplier is 0");
+		}
+
+		if (args.dom_args.domain_weights.x <= 0 ||
+			args.dom_args.domain_weights.y <= 0) {
+			error("domain weights"" must be positive");
+		}
+
+		if (args.dom_args.lp_norm <= 0) {
+			error("Lp norm can not be negative");
+		}
+
+		if (args.dir_multipliers.x < 0 || args.dir_multipliers.y < 0) {
+			error("directional multipliers can not be negative");
+		}
+
+		if (args.range_weights.x <= 0 || args.range_weights.y <= 0) {
+			error("range weights"" must be positive");
+		}
+
+		if (args.time_min <= 0) {
+			error("minimum time"" must be positive");
+		}
+
+		return ret;
+	}
+
+}
diff --git a/common/rawaccel-version.h b/common/rawaccel-version.h
index 40ff2d2..de8644b 100644
--- a/common/rawaccel-version.h
+++ b/common/rawaccel-version.h
@@ -6,21 +6,31 @@
 
 #define RA_OS "Win7+"
 
-#define M_STR_HELPER(x) #x
-#define M_STR(x) M_STR_HELPER(x)
+#define RA_M_STR_HELPER(x) #x
+#define RA_M_STR(x) RA_M_STR_HELPER(x)
 
-#define RA_VER_STRING M_STR(RA_VER_MAJOR) "." M_STR(RA_VER_MINOR) "." M_STR(RA_VER_PATCH)
+#define RA_VER_STRING RA_M_STR(RA_VER_MAJOR) "." RA_M_STR(RA_VER_MINOR) "." RA_M_STR(RA_VER_PATCH)
 
 namespace rawaccel {
 
-	struct version_t {
-		int major;
-		int minor;
-		int patch;
-	};
-
+    struct version_t {
+        int major;
+        int minor;
+        int patch;
+    };
+
+    constexpr bool operator<(const version_t& lhs, const version_t& rhs)
+    {
+        return (lhs.major != rhs.major) ?
+               (lhs.major < rhs.major)  :
+               (lhs.minor != rhs.minor) ?
+               (lhs.minor < rhs.minor)  :
+               (lhs.patch < rhs.patch)  ;
+    }
+
+    inline constexpr version_t version = { RA_VER_MAJOR, RA_VER_MINOR, RA_VER_PATCH };
 #ifndef _KERNEL_MODE
-	inline constexpr version_t min_driver_version = { 1, 4, 0 };
+    inline constexpr version_t min_driver_version = { 1, 4, 0 };
 #endif
 
 }
diff --git a/common/utility.hpp b/common/utility.hpp
index de90d44..5f5c186 100644
--- a/common/utility.hpp
+++ b/common/utility.hpp
@@ -81,4 +81,8 @@ namespace rawaccel {
 	    return ilogb(x) == 0x400;
     }
 
+    struct noop { 
+        template <typename... Ts> 
+        constexpr void operator()(Ts&&...) const noexcept {}
+    };
 }
diff --git a/converter/converter.cpp b/converter/converter.cpp
index 230e1be..7b71af3 100644
--- a/converter/converter.cpp
+++ b/converter/converter.cpp
@@ -1,3 +1,5 @@
+#include <rawaccel-base.hpp>
+
 #include <array>
 #include <charconv>
 #include <filesystem>
@@ -7,8 +9,6 @@
 #include <sstream>
 #include <string>
 
-#include <rawaccel-settings.h>
-
 using namespace System;
 using namespace System::Runtime::InteropServices;
 using namespace Newtonsoft::Json;
@@ -108,7 +108,7 @@ auto make_extractor(const ia_settings_t& ia_settings) {
     };
 }
 
-ra::accel_args convert_natural(const ia_settings_t& ia_settings) {
+ra::accel_args convert_natural(const ia_settings_t& ia_settings, bool legacy) {
     auto get = make_extractor(ia_settings);
 
     double accel = get("Acceleration").value_or(0);
@@ -117,8 +117,13 @@ ra::accel_args convert_natural(const ia_settings_t& ia_settings) {
     double prescale = get("Pre-ScaleX").value_or(1);
 
     ra::accel_args args;
+
     args.limit = 1 + std::abs(cap - sens) / sens;
-    args.accel = accel * prescale / sens;
+    args.accel_natural = accel * prescale / sens;
+    args.offset = get("Offset").value_or(0);
+    args.mode = ra::accel_mode::natural;
+    args.legacy = legacy;
+
     return args;
 }
 
@@ -130,25 +135,16 @@ ra::accel_args convert_quake(const ia_settings_t& ia_settings, bool legacy) {
     double cap = get("SensitivityCap").value_or(0);
     double sens = get("Sensitivity").value_or(1);
     double prescale = get("Pre-ScaleX").value_or(1);
-    double offset = get("Offset").value_or(0);
-
-    ra::accel_args args;
-    double powm1 = power - 1;
-    double rpowm1 = 1 / powm1;
-    double accel_b = std::pow(accel * prescale, powm1) / sens;
-    args.accel = std::pow(accel_b, rpowm1);
-    args.exponent = power;
-    args.legacy_offset = legacy;
-    args.offset = offset;
     
-    double cap_converted = cap / sens;
+    ra::accel_args args;
 
-    if (legacy || cap_converted <= 1) {
-        args.scale_cap = cap_converted;
-    }
-    else {
-        args.gain_cap = offset + std::pow(cap_converted - 1, rpowm1) / args.accel;
-    }
+    double accel_b = std::pow(accel * prescale, power - 1) / sens;
+    args.accel_classic = std::pow(accel_b, 1 / (power - 1));
+    args.cap = cap / sens;
+    args.power = power;
+    args.offset = get("Offset").value_or(0);
+    args.mode = ra::accel_mode::classic;
+    args.legacy = legacy;
 
     return args;
 }
@@ -168,17 +164,15 @@ bool try_convert(const ia_settings_t& ia_settings) {
 
     switch (static_cast<IA_MODES_ENUM>(mode)) {
     case IA_QL: {
-        bool legacy = !ask("We recommend trying out our new cap and offset styles.\n"
-                           "Use new cap and offset?");
-        ra_settings.modes.x = ra::accel_mode::classic;
+        bool legacy = !ask("We recommend trying out a new smooth cap style.\n"
+                           "Use new cap style?");
         ra_settings.argsv.x = convert_quake(ia_settings, legacy);
         break;
     }
     case IA_NAT: {
-        bool nat_gain = ask("Raw Accel offers a new mode that you might like more than Natural.\n"
+        bool legacy = !ask("Raw Accel offers a new mode that you might like more than Natural.\n"
                             "Wanna try it out now?");
-        ra_settings.modes.x = nat_gain ? ra::accel_mode::naturalgain : ra::accel_mode::natural;
-        ra_settings.argsv.x = convert_natural(ia_settings);
+        ra_settings.argsv.x = convert_natural(ia_settings, legacy);
         break;
     }
     case IA_LOG: {
@@ -189,7 +183,7 @@ bool try_convert(const ia_settings_t& ia_settings) {
     }
 
     DriverSettings^ new_settings = Marshal::PtrToStructure<DriverSettings^>((IntPtr)&ra_settings);
-    auto errors = DriverInterop::GetSettingsErrors(new_settings);
+    auto errors = gcnew SettingsErrors(new_settings);
 
     if (!errors->Empty()) {
         Console::WriteLine("Bad settings: {0}", errors);
@@ -197,7 +191,7 @@ bool try_convert(const ia_settings_t& ia_settings) {
     }
 
     Console::Write("Sending to driver... ");
-    DriverInterop::Write(new_settings);
+    (gcnew ManagedAccel(new_settings))->Activate();
     Console::WriteLine("done");
 
     Console::Write("Generating settings.json... ");
@@ -208,10 +202,6 @@ bool try_convert(const ia_settings_t& ia_settings) {
     return true;
 }
 
-public ref struct ASSEMBLY {
-    static initonly Version^ VERSION = ASSEMBLY::typeid->Assembly->GetName()->Version;
-};
-
 int main()
 {
     auto close_prompt = [] {
@@ -221,9 +211,9 @@ int main()
     };
 
     try {
-        VersionHelper::ValidateAndGetDriverVersion(ASSEMBLY::VERSION);
+        VersionHelper::ValidOrThrow();
     }
-    catch (VersionException^ ex) {
+    catch (InteropException^ ex) {
         Console::WriteLine(ex->Message);
         close_prompt();
     }
@@ -239,7 +229,7 @@ int main()
                 entry.path().extension() == IA_PROFILE_EXT) {
                 opt_path = entry;
                 break;
-            }    
+            }
         }
     }
     
diff --git a/driver/driver.cpp b/driver/driver.cpp
index 89f09dc..fbc2d3d 100644
--- a/driver/driver.cpp
+++ b/driver/driver.cpp
@@ -210,7 +210,7 @@ Return Value:
             DebugPrint(("RetrieveOutputBuffer failed: 0x%x\n", status));
         }
         else {
-            *reinterpret_cast<ra::version_t*>(buffer) = { RA_VER_MAJOR, RA_VER_MINOR, RA_VER_PATCH };
+            *reinterpret_cast<ra::version_t*>(buffer) = ra::version;
             bytes_out = sizeof(ra::version_t);
         }
         break;
diff --git a/driver/driver.h b/driver/driver.h
index 56742f6..6184a69 100644
--- a/driver/driver.h
+++ b/driver/driver.h
@@ -1,9 +1,8 @@
 #pragma once
 
 #include "rawaccel-base.hpp"
+#include "rawaccel-io-def.h"
 
-#define NOMINMAX
-#include <ntddk.h>
 #include <kbdmou.h>
 #include <wdf.h>
 
diff --git a/grapher/Properties/AssemblyInfo.cs b/grapher/Properties/AssemblyInfo.cs
index a46d6b3..d381102 100644
--- a/grapher/Properties/AssemblyInfo.cs
+++ b/grapher/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion(RawAccelVersion.value)]
-[assembly: AssemblyFileVersion(RawAccelVersion.value)]
+[assembly: AssemblyVersion(VersionHelper.VersionString)]
+[assembly: AssemblyFileVersion(VersionHelper.VersionString)]
diff --git a/wrapper/wrapper.cpp b/wrapper/wrapper.cpp
index 71a8cf6..757972b 100644
--- a/wrapper/wrapper.cpp
+++ b/wrapper/wrapper.cpp
@@ -1,17 +1,16 @@
 #pragma once
 
+#include <rawaccel-io.hpp>
+#include <rawaccel-validate.hpp>
+#include <utility-rawinput.hpp>
+
 #include <algorithm>
 #include <type_traits>
 #include <msclr\marshal_cppstd.h>
 
-#include <rawaccel.hpp>
-#include <rawaccel-version.h>
-#include <utility-rawinput.hpp>
-
-#include "wrapper_io.hpp"
-
 using namespace System;
 using namespace System::Collections::Generic;
+using namespace System::IO;
 using namespace System::Runtime::InteropServices;
 using namespace System::Reflection;
 
@@ -19,34 +18,39 @@ using namespace Windows::Forms;
 
 using namespace Newtonsoft::Json;
 
+namespace ra = rawaccel;
+
+ra::settings default_settings;
+
 [JsonConverter(Converters::StringEnumConverter::typeid)]
 public enum class AccelMode
 {
-    linear, classic, natural, naturalgain, power, motivity, noaccel
+    classic, jump, natural, power, motivity, noaccel
+};
+
+public enum class TableMode
+{
+    off, binlog, linear
 };
 
-[JsonObject(ItemRequired = Required::Always)]
 [StructLayout(LayoutKind::Sequential)]
-public value struct AccelArgs
+public value struct TableArgs
 {
-    double offset;
+    [JsonIgnore]
+    TableMode mode;
+
     [MarshalAs(UnmanagedType::U1)]
-    bool legacyOffset;
-    double acceleration;
-    double scale;
-    double limit;
-    double exponent;
-    double midpoint;
-    double weight;
-    [JsonProperty("legacyCap")]
-    double scaleCap;
-    double gainCap;
-    [JsonProperty(Required = Required::Default)]
-    double speedCap;
+    bool transfer;
+
+    [MarshalAs(UnmanagedType::U1)]
+    unsigned char partitions;
+
+    short num;
+    double start;
+    double stop;
 };
 
 generic <typename T>
-[JsonObject(ItemRequired = Required::Always)]
 [StructLayout(LayoutKind::Sequential)]
 public value struct Vec2
 {
@@ -54,7 +58,32 @@ public value struct Vec2
     T y;
 };
 
-[JsonObject(ItemRequired = Required::Always)]
+[StructLayout(LayoutKind::Sequential)]
+public value struct AccelArgs
+{
+    AccelMode mode;
+
+    [MarshalAs(UnmanagedType::U1)]
+    bool legacy;
+
+    [JsonProperty(Required = Required::Default)]
+    TableArgs lutArgs;
+
+    double offset;
+    double cap;
+    double accelClassic;
+    double accelNatural;
+    double accelMotivity;
+    double motivity;
+    double power;
+    double scale;
+    double weight;
+    double exponent;
+    double limit;
+    double midpoint;
+    double smooth;
+};
+
 [StructLayout(LayoutKind::Sequential)]
 public value struct DomainArgs
 {
@@ -66,20 +95,22 @@ public value struct DomainArgs
 [StructLayout(LayoutKind::Sequential, CharSet = CharSet::Unicode)]
 public ref struct DriverSettings
 {
+    literal double WriteDelayMs = ra::WRITE_DELAY;
     literal String^ Key = "Driver settings";
 
     [JsonProperty("Degrees of rotation")]
     double rotation;
 
-    [JsonProperty("Degrees of angle snapping", Required = Required::Default)]
+    [JsonProperty("Degrees of angle snapping")]
     double snap;
 
     [JsonProperty("Use x as whole/combined accel")]
     [MarshalAs(UnmanagedType::U1)]
     bool combineMagnitudes;
 
-    [JsonProperty("Accel modes")]
-    Vec2<AccelMode> modes;
+    double dpi;
+
+    double speedCap;
 
     [JsonProperty("Accel parameters")]
     Vec2<AccelArgs> args;
@@ -87,192 +118,125 @@ public ref struct DriverSettings
     [JsonProperty("Sensitivity multipliers")]
     Vec2<double> sensitivity;
 
-    [JsonProperty("Negative directional multipliers", Required = Required::Default)]
+    [JsonProperty("Negative directional multipliers")]
     Vec2<double> directionalMultipliers;
 
-    [JsonProperty("Stretches domain for horizontal vs vertical inputs", Required = Required::Default)]
+    [JsonProperty("Stretches domain for horizontal vs vertical inputs")]
     DomainArgs domainArgs;
 
-    [JsonProperty("Stretches accel range for horizontal vs vertical inputs", Required = Required::Default)]
+    [JsonProperty("Stretches accel range for horizontal vs vertical inputs")]
     Vec2<double> rangeXY;
 
     [JsonProperty(Required = Required::Default)]
     double minimumTime;
 
-    [JsonProperty("Device ID", Required = Required::Default)]
-    [MarshalAs(UnmanagedType::ByValTStr, SizeConst = MAX_DEV_ID_LEN)]
+    [JsonProperty("Device ID")]
+    [MarshalAs(UnmanagedType::ByValTStr, SizeConst = ra::MAX_DEV_ID_LEN)]
     String^ deviceID = "";
 
     bool ShouldSerializeminimumTime() 
     { 
-        return minimumTime > 0 && minimumTime != DEFAULT_TIME_MIN;
+        return minimumTime != ra::DEFAULT_TIME_MIN;
     }
 
     DriverSettings() 
     {
-        domainArgs = { { 1, 1 }, 2 };
-        rangeXY = { 1, 1 };
+        Marshal::PtrToStructure(IntPtr(&default_settings), this);
     }
-};
-
-
-template <typename NativeSettingsFunc>
-void as_native(DriverSettings^ managed_args, NativeSettingsFunc fn)
-{
-#ifndef NDEBUG
-    if (Marshal::SizeOf(managed_args) != sizeof(settings))
-        throw gcnew InvalidOperationException("setting sizes differ");
-#endif
-    settings args;
-    Marshal::StructureToPtr(managed_args, (IntPtr)&args, false);
-    fn(args);
-    if constexpr (!std::is_invocable_v<NativeSettingsFunc, const settings&>) {
-        Marshal::PtrToStructure((IntPtr)&args, managed_args);
-    }
-}
-
-DriverSettings^ get_default()
-{
-    DriverSettings^ managed = gcnew DriverSettings();
-    as_native(managed, [](settings& args) {
-        args = {};
-    });
-    return managed;
-}
-
-void set_active(DriverSettings^ managed)
-{
-    as_native(managed, [](const settings& args) {
-        wrapper_io::writeToDriver(args);
-    });
-}
-
-DriverSettings^ get_active()
-{
-    DriverSettings^ managed = gcnew DriverSettings();
-    as_native(managed, [](settings& args) {
-        wrapper_io::readFromDriver(args);
-    });
-    return managed;
-}
-
-void update_modifier(mouse_modifier& mod, DriverSettings^ managed, vec2<si_pair*> luts = {})
-{
-    as_native(managed, [&](const settings& args) {
-        mod = { args, luts };
-    });
-}
-
-using error_list_t = Collections::Generic::List<String^>;
-
-error_list_t^ get_accel_errors(AccelMode mode, AccelArgs^ args)
-{
-    accel_mode mode_native = (accel_mode)mode;
-
-    auto is_mode = [mode_native](auto... modes) {
-        return ((mode_native == modes) || ...);
-    };
     
-    using am = accel_mode;
+    void ToFile(String^ path)
+    {
+        using namespace Newtonsoft::Json::Linq;
 
-    auto error_list = gcnew error_list_t();
-    
-    if (args->acceleration > 10 && is_mode(am::natural, am::naturalgain))
-        error_list->Add("acceleration can not be greater than 10");
-    else if (args->acceleration == 0 && is_mode(am::naturalgain))
-        error_list->Add("acceleration must be positive");
-    else if (args->acceleration < 0) {
-        bool additive = mode_native < am::power;
-        if (additive) error_list->Add("acceleration can not be negative, use a negative weight to compensate");
-        else error_list->Add("acceleration can not be negative");
+        JObject^ thisJO = JObject::FromObject(this);
+        String^ modes = String::Join(" | ", Enum::GetNames(AccelMode::typeid));
+        thisJO->AddFirst(gcnew JProperty("### Accel Modes ###", modes));
+        File::WriteAllText(path, thisJO->ToString(Formatting::Indented));
     }
-        
-    if (args->scale <= 0)
-        error_list->Add("scale must be positive");
 
-    if (args->exponent <= 1 && is_mode(am::classic))
-        error_list->Add("exponent must be greater than 1");
-    else if (args->exponent <= 0)
-        error_list->Add("exponent must be positive");
+    static DriverSettings^ FromFile(String^ path)
+    {
+        if (!File::Exists(path))
+        {
+            throw gcnew FileNotFoundException(
+                String::Format("Settings file not found at {0}", path));
+        }
 
-    if (args->limit <= 1)
-        error_list->Add("limit must be greater than 1");
+        auto settings = JsonConvert::DeserializeObject<DriverSettings^>(
+            File::ReadAllText(path));
 
-    if (args->midpoint <= 0)
-        error_list->Add("midpoint must be positive");
+        if (settings == nullptr) {
+            throw gcnew JsonException(String::Format("{0} contains invalid JSON", path));
+        }
 
-    if (args->offset < 0)
-        error_list->Add("offset can not be negative");
+        return settings;
+    }
+};
 
-    return error_list;
-}
+public ref struct InteropException : public Exception {
+public:
+    InteropException(String^ what) :
+        Exception(what) {}
+    InteropException(const char* what) :
+        Exception(gcnew String(what)) {}
+    InteropException(const std::exception& e) :
+        InteropException(e.what()) {}
+};
 
-error_list_t^ get_other_errors(DriverSettings^ settings)
+public ref class SettingsErrors
 {
-    auto error_list = gcnew error_list_t();
+public:
+    List<String^>^ list;
+    int countX;
+    int countY;
 
-    if (settings->rangeXY.x <= 0 || settings->rangeXY.y <= 0)
-    {
-        error_list->Add("range values must be positive");
-    }
+    delegate void MsgHandler(const char*);
 
-    if (settings->domainArgs.domainXY.x <= 0 || settings->domainArgs.domainXY.y <= 0)
+    void Add(const char* msg)
     {
-        error_list->Add("domain values must be positive");
+        list->Add(msclr::interop::marshal_as<String^>(msg));
     }
 
-    if (settings->domainArgs.lpNorm <= 0)
+    SettingsErrors(DriverSettings^ settings)
     {
-        error_list->Add("lp norm must be positive");
-    }
-    
-    return error_list;
-}
+        MsgHandler^ del = gcnew MsgHandler(this, &SettingsErrors::Add);
+        GCHandle gch = GCHandle::Alloc(del);
+        auto fp = static_cast<void (*)(const char*)>(
+            Marshal::GetFunctionPointerForDelegate(del).ToPointer());
 
-public ref class SettingsErrors
-{
-public:
-    error_list_t^ x;
-    error_list_t^ y;
-    error_list_t^ other;
+        ra::settings args;
+        Marshal::StructureToPtr(settings, (IntPtr)&args, false);
+
+        list = gcnew List<String^>();
+        auto [cx, cy, _] = ra::valid(args, fp);
+        countX = cx;
+        countY = cy;
+
+        gch.Free();
+    }
 
     bool Empty()
     {
-        return (x == nullptr || x->Count == 0) && 
-            (y == nullptr || y->Count == 0) &&
-            (other == nullptr || other->Count == 0);
+        return list->Count == 0;
     }
 
-    virtual String^ ToString() override 
+    virtual String^ ToString() override
     {
-        if (x == nullptr) throw;
-
         Text::StringBuilder^ sb = gcnew Text::StringBuilder();
 
-        if (y == nullptr) // assume combineMagnitudes
+        for each (auto s in list->GetRange(0, countX))
         {
-            for each (String^ str in x)
-            {
-                sb->AppendLine(str);
-            }
+            sb->AppendFormat("x: {0}\n", s);
         }
-        else
+        for each (auto s in list->GetRange(countX, countY))
         {
-            for each (String^ str in x)
-            {
-                sb->AppendFormat("x: {0}\n", str);
-            }
-            for each (String^ str in y)
-            {
-                sb->AppendFormat("y: {0}\n", str);
-            }
+            sb->AppendFormat("y: {0}\n", s);
         }
-
-        for each (String ^ str in other)
+        for each (auto s in list->GetRange(countY, list->Count))
         {
-			sb->AppendLine(str);
+            sb->AppendLine(s);
         }
-        
+
         return sb->ToString();
     }
 };
@@ -314,7 +278,7 @@ public ref struct RawInputInterop
         }
         catch (const std::exception& e)
         {
-            throw gcnew System::Exception(gcnew String(e.what()));
+            throw gcnew InteropException(e);
         }
     }
 
@@ -336,80 +300,32 @@ public ref struct RawInputInterop
         }
         catch (const std::exception& e)
         {
-            throw gcnew System::Exception(gcnew String(e.what()));
+            throw gcnew InteropException(e);
         }
     }
 
 };
 
-public ref struct DriverInterop
+public ref class ManagedAccel
 {
-    literal double WriteDelayMs = WRITE_DELAY;
-    static initonly DriverSettings^ DefaultSettings = get_default();
-
-    static DriverSettings^ GetActiveSettings()
-    {
-        return get_active();
-    }
-
-    static void Write(DriverSettings^ args)
-    {
-        set_active(args);
-    }
+    ra::io_t* const instance = new ra::io_t();
 
-    static DriverSettings^ GetDefaultSettings()
-    {
-        return get_default();
-    }
+public:
+    ManagedAccel() {};
 
-    static SettingsErrors^ GetSettingsErrors(DriverSettings^ args)
+    ManagedAccel(DriverSettings^ settings)
     {
-        auto errors = gcnew SettingsErrors();
-
-        errors->x = get_accel_errors(args->modes.x, args->args.x);
-
-        if (!args->combineMagnitudes) {
-            errors->y = get_accel_errors(args->modes.y, args->args.y);
-        }
-
-        errors->other = get_other_errors(args);
-
-        return errors;
+        Settings = settings;
     }
 
-
-
-    static error_list_t^ GetAccelErrors(AccelMode mode, AccelArgs^ args)
-    {
-        return get_accel_errors(mode, args);
-    }
-};
-
-public ref class ManagedAccel
-{
-    mouse_modifier* const modifier_instance = new mouse_modifier();
-#ifdef RA_LOOKUP
-    si_pair* const lut_x = new si_pair[LUT_SIZE];
-    si_pair* const lut_y = new si_pair[LUT_SIZE];
-#else
-    si_pair* lut_x = nullptr;
-    si_pair* lut_y = nullptr;
-#endif
-
-public:
-
     virtual ~ManagedAccel()
     {
-        delete modifier_instance;
-        delete[] lut_x;
-        delete[] lut_y;
+        delete instance;
     }
 
     !ManagedAccel()
     {
-        delete modifier_instance;
-        delete[] lut_x;
-        delete[] lut_y;
+        delete instance;
     }
 
     Tuple<double, double>^ Accelerate(int x, int y, double time)
@@ -418,89 +334,64 @@ public:
             (double)x,
             (double)y
         };
-        modifier_instance->modify(in_out_vec, time);
+
+        instance->mod.modify(in_out_vec, time);
 
         return gcnew Tuple<double, double>(in_out_vec.x, in_out_vec.y);
     }
 
-    void UpdateFromSettings(DriverSettings^ args)
+    void Activate()
     {
-        update_modifier(
-            *modifier_instance, 
-            args, 
-            vec2<si_pair*>{ lut_x, lut_y }
-        );
+        try {
+            ra::write(*instance);
+        }
+        catch (const ra::error& e) {
+            throw gcnew InteropException(e);
+        }
     }
 
-    static ManagedAccel^ GetActiveAccel()
+    property DriverSettings^ Settings
     {
-        settings args;
-        wrapper_io::readFromDriver(args);
+        DriverSettings^ get()
+        {
+            DriverSettings^ settings = gcnew DriverSettings();
+            Marshal::PtrToStructure(IntPtr(&instance->args), settings);
+            return settings;
+        }
 
-        auto active = gcnew ManagedAccel();
-        *active->modifier_instance = { 
-            args
-            , vec2<si_pair*> { active->lut_x, active->lut_y }
-        };
-        return active;
-    }
-};
+        void set(DriverSettings^ val)
+        {
+            Marshal::StructureToPtr(val, IntPtr(&instance->args), false);
+            instance->mod = { instance->args };
+        }
 
-public ref struct RawAccelVersion
-{
-    literal String^ value = RA_VER_STRING;
-};
+    }
 
-public ref struct VersionException : public Exception 
-{
-public:
-    VersionException() {}
-    VersionException(String^ what) : Exception(what) {}
+    static ManagedAccel^ GetActive()
+    {
+        try {
+            auto active = gcnew ManagedAccel();
+            ra::read(*active->instance);
+            return active;
+        }
+        catch (const ra::error& e) {
+            throw gcnew InteropException(e);
+        }
+    }
 };
 
-Version^ convert(rawaccel::version_t v)
-{
-    return gcnew Version(v.major, v.minor, v.patch, 0);
-}
-
 public ref struct VersionHelper
 {
+    literal String^ VersionString = RA_VER_STRING;
 
-    static Version^ ValidateAndGetDriverVersion(Version^ wrapperTarget)
+    static Version^ ValidOrThrow()
     {
-        Version^ wrapperActual = VersionHelper::typeid->Assembly->GetName()->Version;
-
-        if (wrapperTarget != wrapperActual) {
-            throw gcnew VersionException("version mismatch, expected wrapper.dll v" + wrapperActual);
-        }
-
-        version_t drv_ver;
-
         try {
-            wrapper_io::getDriverVersion(drv_ver);
-        }
-        catch (DriverNotInstalledException^ ex) {
-            throw gcnew VersionException(ex->Message);
-        }
-        catch (DriverIOException^) {
-            // Assume version ioctl is unimplemented (driver version < v1.3.0)
-            throw gcnew VersionException("driver version is out of date\n\nrun installer.exe to reinstall");
-        }
-
-        Version^ drv_ver_managed = convert(drv_ver);
-
-        if (drv_ver_managed < convert(min_driver_version)) {
-            throw gcnew VersionException(
-                String::Format("driver version is out of date (v{0})\n\nrun installer.exe to reinstall", 
-                    drv_ver_managed));
-        }
-        else if (drv_ver_managed > wrapperActual) {
-            throw gcnew VersionException(
-                String::Format("newer driver version is installed (v{0})",
-                    drv_ver_managed));
+            ra::version_t v = ra::valid_version_or_throw();
+            return gcnew Version(v.major, v.minor, v.patch, 0);
         }
-        else {
-            return drv_ver_managed;
+        catch (const ra::error& e) {
+            throw gcnew InteropException(e);
         }
     }
 
diff --git a/wrapper/wrapper.vcxproj b/wrapper/wrapper.vcxproj
index 721a981..fba03a7 100644
--- a/wrapper/wrapper.vcxproj
+++ b/wrapper/wrapper.vcxproj
@@ -84,12 +84,10 @@ copy /Y "$(TargetDir)Newtonsoft.Json.dll" "$(SolutionDir)signed\Newtonsoft.Json.
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClInclude Include="resource.h" />
-    <ClInclude Include="wrapper_io.hpp" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="AssemblyInfo.cpp" />
     <ClCompile Include="wrapper.cpp" />
-    <ClCompile Include="wrapper_io.cpp" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="Newtonsoft.Json">
diff --git a/wrapper/wrapper.vcxproj.filters b/wrapper/wrapper.vcxproj.filters
index f265d72..96b8e1a 100644
--- a/wrapper/wrapper.vcxproj.filters
+++ b/wrapper/wrapper.vcxproj.filters
@@ -15,9 +15,6 @@
     </Filter>
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="wrapper_io.hpp">
-      <Filter>Header Files</Filter>
-    </ClInclude>
     <ClInclude Include="resource.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -26,9 +23,6 @@
     <ClCompile Include="wrapper.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="wrapper_io.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
     <ClCompile Include="AssemblyInfo.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
diff --git a/wrapper/wrapper_io.cpp b/wrapper/wrapper_io.cpp
deleted file mode 100644
index 4b77174..0000000
--- a/wrapper/wrapper_io.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-#pragma once
-
-#include <rawaccel-io.hpp>
-#include "wrapper_io.hpp"
-
-auto with_managed_ex = [](auto fn) {
-	try
-	{
-		fn();
-	}
-	catch (const install_error&)
-	{
-		throw gcnew DriverNotInstalledException();
-	}
-	catch (const std::system_error& e)
-	{
-		throw gcnew DriverIOException(gcnew String(e.what()));
-	}
-};
-
-void wrapper_io::writeToDriver(const settings& args)
-{
-	with_managed_ex([&] {
-		write(args);
-	});
-}
-
-void wrapper_io::readFromDriver(settings& args)
-{
-	with_managed_ex([&] {
-		args = read();
-	});
-}
-
-void wrapper_io::getDriverVersion(version_t& ver)
-{
-	with_managed_ex([&] {
-		ver = get_version();
-	});
-}
diff --git a/wrapper/wrapper_io.hpp b/wrapper/wrapper_io.hpp
deleted file mode 100644
index 6b94e46..0000000
--- a/wrapper/wrapper_io.hpp
+++ /dev/null
@@ -1,25 +0,0 @@
-#pragma once
-
-#include <rawaccel-error.hpp>
-#include <rawaccel-settings.h>
-#include <rawaccel-version.h>
-
-using namespace rawaccel;
-using namespace System;
-
-struct wrapper_io {
-	static void writeToDriver(const settings&);
-	static void readFromDriver(settings&);
-	static void getDriverVersion(version_t&);
-};
-
-public ref struct DriverIOException : public IO::IOException {
-public:
-	DriverIOException() {}
-	DriverIOException(String^ what) : IO::IOException(what) {}
-};
-
-public ref struct DriverNotInstalledException : public DriverIOException {
-	DriverNotInstalledException() : 
-		DriverIOException(gcnew String(install_error().what())) {}
-};
diff --git a/writer/Program.cs b/writer/Program.cs
index 37e384c..d381c16 100644
--- a/writer/Program.cs
+++ b/writer/Program.cs
@@ -16,27 +16,13 @@ namespace writer
             MessageBox.Show(msg, "Raw Accel writer");
         }
 
-        static void Send(JToken settingsToken)
-        {
-            var settings = settingsToken.ToObject<DriverSettings>();
-
-            var errors = DriverInterop.GetSettingsErrors(settings);
-            if (errors.Empty())
-            {
-                DriverInterop.Write(settings);
-                return;
-            }
-
-            Show($"Bad settings:\n\n{errors}");
-        }
-
         static void Main(string[] args)
         {
             try
             {
-                VersionHelper.ValidateAndGetDriverVersion(typeof(Program).Assembly.GetName().Version);
+                VersionHelper.ValidOrThrow();
             }
-            catch (VersionException e)
+            catch (InteropException e)
             {
                 Show(e.Message);
                 return;
@@ -48,23 +34,19 @@ namespace writer
                 return;
             }
 
-            if (!File.Exists(args[0]))
-            {
-                Show($"Settings file not found at {args[0]}");
-                return;
-            }
-
             try
             {
-                var JO = JObject.Parse(File.ReadAllText(args[0]));
+                var settings = DriverSettings.FromFile(args[0]);
+                var errors = new SettingsErrors(settings);
 
-                if (JO.ContainsKey(DriverSettings.Key))
+                if (errors.Empty())
                 {
-                    Send(JO[DriverSettings.Key]);
-                    return;
+                    new ManagedAccel(settings).Activate();
+                }
+                else
+                {
+                    Show($"Bad settings:\n\n{errors}");
                 }
-
-                Send(JO);
             }
             catch (JsonException e)
             {
diff --git a/writer/Properties/AssemblyInfo.cs b/writer/Properties/AssemblyInfo.cs
index fc6a1ca..7f47c6d 100644
--- a/writer/Properties/AssemblyInfo.cs
+++ b/writer/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion(RawAccelVersion.value)]
-[assembly: AssemblyFileVersion(RawAccelVersion.value)]
+[assembly: AssemblyVersion(VersionHelper.VersionString)]
+[assembly: AssemblyFileVersion(VersionHelper.VersionString)]
\ No newline at end of file