Commit 38d10ee4d0

Eric Joldasov <bratishkaerik@getgoogleoff.me>
2023-07-18 16:54:37
src/windows_sdk.cpp: port to Zig
Signed-off-by: Eric Joldasov <bratishkaerik@getgoogleoff.me>
1 parent 664ecdf
src/libc_installation.zig
@@ -186,21 +186,19 @@ pub const LibCInstallation = struct {
         } else if (is_windows) {
             if (!build_options.have_llvm)
                 return error.WindowsSdkNotFound;
-            var sdk: *ZigWindowsSDK = undefined;
-            switch (ZigWindowsSDK.find(&sdk)) {
-                .None => {
-                    defer sdk.free();
-
-                    try self.findNativeMsvcIncludeDir(args, sdk);
-                    try self.findNativeMsvcLibDir(args, sdk);
-                    try self.findNativeKernel32LibDir(args, sdk);
-                    try self.findNativeIncludeDirWindows(args, sdk);
-                    try self.findNativeCrtDirWindows(args, sdk);
-                },
-                .OutOfMemory => return error.OutOfMemory,
-                .NotFound => return error.WindowsSdkNotFound,
-                .PathTooLong => return error.WindowsSdkNotFound,
-            }
+
+            var sdk: ZigWindowsSDK = ZigWindowsSDK.find(args.allocator) catch |err| switch (err) {
+                error.NotFound => return error.WindowsSdkNotFound,
+                error.PathTooLong => return error.WindowsSdkNotFound,
+                error.OutOfMemory => return error.OutOfMemory,
+            };
+            defer sdk.free(args.allocator);
+
+            try self.findNativeMsvcIncludeDir(args, &sdk);
+            try self.findNativeMsvcLibDir(args, &sdk);
+            try self.findNativeKernel32LibDir(args, &sdk);
+            try self.findNativeIncludeDirWindows(args, &sdk);
+            try self.findNativeCrtDirWindows(args, &sdk);
         } else if (is_haiku) {
             try self.findNativeIncludeDirPosix(args);
             try self.findNativeCrtBeginDirHaiku(args);
@@ -512,8 +510,7 @@ pub const LibCInstallation = struct {
     ) FindError!void {
         const allocator = args.allocator;
 
-        const msvc_lib_dir_ptr = sdk.msvc_lib_dir_ptr orelse return error.LibCStdLibHeaderNotFound;
-        const msvc_lib_dir = msvc_lib_dir_ptr[0..sdk.msvc_lib_dir_len];
+        const msvc_lib_dir = sdk.msvc_lib_dir orelse return error.LibCStdLibHeaderNotFound;
         const up1 = fs.path.dirname(msvc_lib_dir) orelse return error.LibCStdLibHeaderNotFound;
         const up2 = fs.path.dirname(up1) orelse return error.LibCStdLibHeaderNotFound;
 
@@ -544,8 +541,8 @@ pub const LibCInstallation = struct {
         sdk: *ZigWindowsSDK,
     ) FindError!void {
         const allocator = args.allocator;
-        const msvc_lib_dir_ptr = sdk.msvc_lib_dir_ptr orelse return error.LibCRuntimeNotFound;
-        self.msvc_lib_dir = try allocator.dupeZ(u8, msvc_lib_dir_ptr[0..sdk.msvc_lib_dir_len]);
+        const msvc_lib_dir = sdk.msvc_lib_dir orelse return error.LibCRuntimeNotFound;
+        self.msvc_lib_dir = try allocator.dupe(u8, msvc_lib_dir);
     }
 };
 
@@ -657,23 +654,19 @@ const Search = struct {
 
 fn fillSearch(search_buf: *[2]Search, sdk: *ZigWindowsSDK) []Search {
     var search_end: usize = 0;
-    if (sdk.path10_ptr) |path10_ptr| {
-        if (sdk.version10_ptr) |version10_ptr| {
-            search_buf[search_end] = Search{
-                .path = path10_ptr[0..sdk.path10_len],
-                .version = version10_ptr[0..sdk.version10_len],
-            };
-            search_end += 1;
-        }
+    if (sdk.windows10sdk) |windows10sdk| {
+        search_buf[search_end] = .{
+            .path = windows10sdk.path,
+            .version = windows10sdk.version,
+        };
+        search_end += 1;
     }
-    if (sdk.path81_ptr) |path81_ptr| {
-        if (sdk.version81_ptr) |version81_ptr| {
-            search_buf[search_end] = Search{
-                .path = path81_ptr[0..sdk.path81_len],
-                .version = version81_ptr[0..sdk.version81_len],
-            };
-            search_end += 1;
-        }
+    if (sdk.windows81sdk) |windows81sdk| {
+        search_buf[search_end] = .{
+            .path = windows81sdk.path,
+            .version = windows81sdk.version,
+        };
+        search_end += 1;
     }
     return search_buf[0..search_end];
 }
src/windows_com.hpp
@@ -1,909 +0,0 @@
-// The MIT License(MIT)
-// Copyright(C) Microsoft Corporation.All rights reserved.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files(the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions :
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
-// IN THE SOFTWARE.
-//
-
-#pragma once
-
-// Windows headers
-#include <windows.h>
-#include <fcntl.h>
-#include <io.h>
-#include <shellapi.h>
-
-// Standard headers
-#include <stdio.h>
-
-// COM support header files
-#include <comdef.h>
-
-// Constants
-//
-#ifndef E_NOTFOUND
-#define E_NOTFOUND HRESULT_FROM_WIN32(ERROR_NOT_FOUND)
-#endif
-
-#ifndef E_FILENOTFOUND
-#define E_FILENOTFOUND HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND)
-#endif
-
-#ifndef E_NOTSUPPORTED
-#define E_NOTSUPPORTED HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED)
-#endif
-
-// Enumerations
-//
-/// <summary>
-/// The state of an instance.
-/// </summary>
-enum InstanceState
-{
-	/// <summary>
-	/// The instance state has not been determined.
-	/// </summary>
-	eNone = 0,
-
-	/// <summary>
-	/// The instance installation path exists.
-	/// </summary>
-	eLocal = 1,
-
-	/// <summary>
-	/// A product is registered to the instance.
-	/// </summary>
-	eRegistered = 2,
-
-	/// <summary>
-	/// No reboot is required for the instance.
-	/// </summary>
-	eNoRebootRequired = 4,
-
-	/// <summary>
-	/// No errors were reported for the instance.
-	/// </summary>
-	eNoErrors = 8,
-
-	/// <summary>
-	/// The instance represents a complete install.
-	/// </summary>
-	eComplete = UINT_MAX,
-};
-
-// Forward interface declarations
-//
-#ifndef __ISetupInstance_FWD_DEFINED__
-#define __ISetupInstance_FWD_DEFINED__
-typedef struct ISetupInstance ISetupInstance;
-#endif
-
-#ifndef __ISetupInstance2_FWD_DEFINED__
-#define __ISetupInstance2_FWD_DEFINED__
-typedef struct ISetupInstance2 ISetupInstance2;
-#endif
-
-#ifndef __ISetupInstanceCatalog_FWD_DEFINED__
-#define __ISetupInstanceCatalog_FWD_DEFINED__
-typedef struct ISetupInstanceCatalog ISetupInstanceCatalog;
-#endif
-
-#ifndef __ISetupLocalizedProperties_FWD_DEFINED__
-#define __ISetupLocalizedProperties_FWD_DEFINED__
-typedef struct ISetupLocalizedProperties ISetupLocalizedProperties;
-#endif
-
-#ifndef __IEnumSetupInstances_FWD_DEFINED__
-#define __IEnumSetupInstances_FWD_DEFINED__
-typedef struct IEnumSetupInstances IEnumSetupInstances;
-#endif
-
-#ifndef __ISetupConfiguration_FWD_DEFINED__
-#define __ISetupConfiguration_FWD_DEFINED__
-typedef struct ISetupConfiguration ISetupConfiguration;
-#endif
-
-#ifndef __ISetupConfiguration2_FWD_DEFINED__
-#define __ISetupConfiguration2_FWD_DEFINED__
-typedef struct ISetupConfiguration2 ISetupConfiguration2;
-#endif
-
-#ifndef __ISetupPackageReference_FWD_DEFINED__
-#define __ISetupPackageReference_FWD_DEFINED__
-typedef struct ISetupPackageReference ISetupPackageReference;
-#endif
-
-#ifndef __ISetupHelper_FWD_DEFINED__
-#define __ISetupHelper_FWD_DEFINED__
-typedef struct ISetupHelper ISetupHelper;
-#endif
-
-#ifndef __ISetupErrorState_FWD_DEFINED__
-#define __ISetupErrorState_FWD_DEFINED__
-typedef struct ISetupErrorState ISetupErrorState;
-#endif
-
-#ifndef __ISetupErrorState2_FWD_DEFINED__
-#define __ISetupErrorState2_FWD_DEFINED__
-typedef struct ISetupErrorState2 ISetupErrorState2;
-#endif
-
-#ifndef __ISetupFailedPackageReference_FWD_DEFINED__
-#define __ISetupFailedPackageReference_FWD_DEFINED__
-typedef struct ISetupFailedPackageReference ISetupFailedPackageReference;
-#endif
-
-#ifndef __ISetupFailedPackageReference2_FWD_DEFINED__
-#define __ISetupFailedPackageReference2_FWD_DEFINED__
-typedef struct ISetupFailedPackageReference2 ISetupFailedPackageReference2;
-#endif
-
-#ifndef __ISetupPropertyStore_FWD_DEFINED__
-#define __ISetupPropertyStore_FWD_DEFINED__
-typedef struct ISetupPropertyStore ISetupPropertyStore;
-#endif
-
-#ifndef __ISetupLocalizedPropertyStore_FWD_DEFINED__
-#define __ISetupLocalizedPropertyStore_FWD_DEFINED__
-typedef struct ISetupLocalizedPropertyStore ISetupLocalizedPropertyStore;
-#endif
-
-// Forward class declarations
-//
-#ifndef __SetupConfiguration_FWD_DEFINED__
-#define __SetupConfiguration_FWD_DEFINED__
-
-#ifdef __cplusplus
-typedef class SetupConfiguration SetupConfiguration;
-#endif
-
-#endif
-
-#ifndef _MSC_VER
-#define _Deref_out_opt_
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-	// Interface definitions
-	//
-	EXTERN_C const IID IID_ISetupInstance;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Information about an instance of a product.
-	/// </summary>
-	struct DECLSPEC_UUID("B41463C3-8866-43B5-BC33-2B0676F7F42E") DECLSPEC_NOVTABLE ISetupInstance : public IUnknown
-	{
-		/// <summary>
-		/// Gets the instance identifier (should match the name of the parent instance directory).
-		/// </summary>
-		/// <param name="pbstrInstanceId">The instance identifier.</param>
-		/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist.</returns>
-		STDMETHOD(GetInstanceId)(
-			_Out_ BSTR* pbstrInstanceId
-			) = 0;
-
-	/// <summary>
-	/// Gets the local date and time when the installation was originally installed.
-	/// </summary>
-	/// <param name="pInstallDate">The local date and time when the installation was originally installed.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property is not defined.</returns>
-	STDMETHOD(GetInstallDate)(
-		_Out_ LPFILETIME pInstallDate
-		) = 0;
-
-	/// <summary>
-	/// Gets the unique name of the installation, often indicating the branch and other information used for telemetry.
-	/// </summary>
-	/// <param name="pbstrInstallationName">The unique name of the installation, often indicating the branch and other information used for telemetry.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property is not defined.</returns>
-	STDMETHOD(GetInstallationName)(
-		_Out_ BSTR* pbstrInstallationName
-		) = 0;
-
-	/// <summary>
-	/// Gets the path to the installation root of the product.
-	/// </summary>
-	/// <param name="pbstrInstallationPath">The path to the installation root of the product.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property is not defined.</returns>
-	STDMETHOD(GetInstallationPath)(
-		_Out_ BSTR* pbstrInstallationPath
-		) = 0;
-
-	/// <summary>
-	/// Gets the version of the product installed in this instance.
-	/// </summary>
-	/// <param name="pbstrInstallationVersion">The version of the product installed in this instance.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property is not defined.</returns>
-	STDMETHOD(GetInstallationVersion)(
-		_Out_ BSTR* pbstrInstallationVersion
-		) = 0;
-
-	/// <summary>
-	/// Gets the display name (title) of the product installed in this instance.
-	/// </summary>
-	/// <param name="lcid">The LCID for the display name.</param>
-	/// <param name="pbstrDisplayName">The display name (title) of the product installed in this instance.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property is not defined.</returns>
-	STDMETHOD(GetDisplayName)(
-		_In_ LCID lcid,
-		_Out_ BSTR* pbstrDisplayName
-		) = 0;
-
-	/// <summary>
-	/// Gets the description of the product installed in this instance.
-	/// </summary>
-	/// <param name="lcid">The LCID for the description.</param>
-	/// <param name="pbstrDescription">The description of the product installed in this instance.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property is not defined.</returns>
-	STDMETHOD(GetDescription)(
-		_In_ LCID lcid,
-		_Out_ BSTR* pbstrDescription
-		) = 0;
-
-	/// <summary>
-	/// Resolves the optional relative path to the root path of the instance.
-	/// </summary>
-	/// <param name="pwszRelativePath">A relative path within the instance to resolve, or NULL to get the root path.</param>
-	/// <param name="pbstrAbsolutePath">The full path to the optional relative path within the instance. If the relative path is NULL, the root path will always terminate in a backslash.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property is not defined.</returns>
-	STDMETHOD(ResolvePath)(
-		_In_opt_z_ LPCOLESTR pwszRelativePath,
-		_Out_ BSTR* pbstrAbsolutePath
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupInstance2;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Information about an instance of a product.
-	/// </summary>
-	struct DECLSPEC_UUID("89143C9A-05AF-49B0-B717-72E218A2185C") DECLSPEC_NOVTABLE ISetupInstance2 : public ISetupInstance
-	{
-		/// <summary>
-		/// Gets the state of the instance.
-		/// </summary>
-		/// <param name="pState">The state of the instance.</param>
-		/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist.</returns>
-		STDMETHOD(GetState)(
-			_Out_ InstanceState* pState
-			) = 0;
-
-	/// <summary>
-	/// Gets an array of package references registered to the instance.
-	/// </summary>
-	/// <param name="ppsaPackages">Pointer to an array of <see cref="ISetupPackageReference"/>.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the packages property is not defined.</returns>
-	STDMETHOD(GetPackages)(
-		_Out_ LPSAFEARRAY* ppsaPackages
-		) = 0;
-
-	/// <summary>
-	/// Gets a pointer to the <see cref="ISetupPackageReference"/> that represents the registered product.
-	/// </summary>
-	/// <param name="ppPackage">Pointer to an instance of <see cref="ISetupPackageReference"/>. This may be NULL if <see cref="GetState"/> does not return <see cref="eComplete"/>.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the packages property is not defined.</returns>
-	STDMETHOD(GetProduct)(
-		_Outptr_result_maybenull_ ISetupPackageReference** ppPackage
-		) = 0;
-
-	/// <summary>
-	/// Gets the relative path to the product application, if available.
-	/// </summary>
-	/// <param name="pbstrProductPath">The relative path to the product application, if available.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist.</returns>
-	STDMETHOD(GetProductPath)(
-		_Outptr_result_maybenull_ BSTR* pbstrProductPath
-		) = 0;
-
-	/// <summary>
-	/// Gets the error state of the instance, if available.
-	/// </summary>
-	/// <param name="pErrorState">The error state of the instance, if available.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist.</returns>
-	STDMETHOD(GetErrors)(
-		_Outptr_result_maybenull_ ISetupErrorState** ppErrorState
-		) = 0;
-
-	/// <summary>
-	/// Gets a value indicating whether the instance can be launched.
-	/// </summary>
-	/// <param name="pfIsLaunchable">Whether the instance can be launched.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	/// <remarks>
-	/// An instance could have had errors during install but still be launched. Some features may not work correctly, but others will.
-	/// </remarks>
-	STDMETHOD(IsLaunchable)(
-		_Out_ VARIANT_BOOL* pfIsLaunchable
-		) = 0;
-
-	/// <summary>
-	/// Gets a value indicating whether the instance is complete.
-	/// </summary>
-	/// <param name="pfIsLaunchable">Whether the instance is complete.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	/// <remarks>
-	/// An instance is complete if it had no errors during install, resume, or repair.
-	/// </remarks>
-	STDMETHOD(IsComplete)(
-		_Out_ VARIANT_BOOL* pfIsComplete
-		) = 0;
-
-	/// <summary>
-	/// Gets product-specific properties.
-	/// </summary>
-	/// <param name="ppProperties">A pointer to an instance of <see cref="ISetupPropertyStore"/>. This may be NULL if no properties are defined.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist.</returns>
-	STDMETHOD(GetProperties)(
-		_Outptr_result_maybenull_ ISetupPropertyStore** ppProperties
-		) = 0;
-
-	/// <summary>
-	/// Gets the directory path to the setup engine that installed the instance.
-	/// </summary>
-	/// <param name="pbstrEnginePath">The directory path to the setup engine that installed the instance.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist.</returns>
-	STDMETHOD(GetEnginePath)(
-		_Outptr_result_maybenull_ BSTR* pbstrEnginePath
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupInstanceCatalog;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Information about a catalog used to install an instance.
-	/// </summary>
-	struct DECLSPEC_UUID("9AD8E40F-39A2-40F1-BF64-0A6C50DD9EEB") DECLSPEC_NOVTABLE ISetupInstanceCatalog : public IUnknown
-	{
-		/// <summary>
-		/// Gets catalog information properties.
-		/// </summary>
-		/// <param name="ppCatalogInfo">A pointer to an instance of <see cref="ISetupPropertyStore"/>.</param>
-		/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property does not exist.</returns>
-		STDMETHOD(GetCatalogInfo)(
-			_Out_ ISetupPropertyStore** ppCatalogInfo
-			) = 0;
-
-	/// <summary>
-	/// Gets a value indicating whether the catalog is a prerelease.
-	/// </summary>
-	/// <param name="pfIsPrerelease">Whether the catalog for the instance is a prerelease version.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_FILENOTFOUND if the instance state does not exist and E_NOTFOUND if the property does not exist.</returns>
-	STDMETHOD(IsPrerelease)(
-		_Out_ VARIANT_BOOL* pfIsPrerelease
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupLocalizedProperties;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Provides localized properties of an instance of a product.
-	/// </summary>
-	struct DECLSPEC_UUID("F4BD7382-FE27-4AB4-B974-9905B2A148B0") DECLSPEC_NOVTABLE ISetupLocalizedProperties : public IUnknown
-	{
-		/// <summary>
-		/// Gets localized product-specific properties.
-		/// </summary>
-		/// <param name="ppLocalizedProperties">A pointer to an instance of <see cref="ISetupLocalizedPropertyStore"/>. This may be NULL if no properties are defined.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(GetLocalizedProperties)(
-			_Outptr_result_maybenull_ ISetupLocalizedPropertyStore** ppLocalizedProperties
-			) = 0;
-
-	/// <summary>
-	/// Gets localized channel-specific properties.
-	/// </summary>
-	/// <param name="ppLocalizedChannelProperties">A pointer to an instance of <see cref="ISetupLocalizedPropertyStore"/>. This may be NULL if no channel properties are defined.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetLocalizedChannelProperties)(
-		_Outptr_result_maybenull_ ISetupLocalizedPropertyStore** ppLocalizedChannelProperties
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_IEnumSetupInstances;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-
-#ifdef __GNUC__
-    __CRT_UUID_DECL(IEnumSetupInstances, 0x6380BCFF, 0x41D3, 0x4B2E, 0x8B, 0x2E, 0xBF, 0x8A, 0x68, 0x10, 0xC8, 0x48);
-#endif
-
-	/// <summary>
-	/// An enumerator of installed <see cref="ISetupInstance"/> objects.
-	/// </summary>
-	struct DECLSPEC_UUID("6380BCFF-41D3-4B2E-8B2E-BF8A6810C848") DECLSPEC_NOVTABLE IEnumSetupInstances : public IUnknown
-	{
-		/// <summary>
-		/// Retrieves the next set of product instances in the enumeration sequence.
-		/// </summary>
-		/// <param name="celt">The number of product instances to retrieve.</param>
-		/// <param name="rgelt">A pointer to an array of <see cref="ISetupInstance"/>.</param>
-		/// <param name="pceltFetched">A pointer to the number of product instances retrieved. If <paramref name="celt"/> is 1 this parameter may be NULL.</param>
-		/// <returns>S_OK if the number of elements were fetched, S_FALSE if nothing was fetched (at end of enumeration), E_INVALIDARG if <paramref name="celt"/> is greater than 1 and pceltFetched is NULL, or E_OUTOFMEMORY if an <see cref="ISetupInstance"/> could not be allocated.</returns>
-		STDMETHOD(Next)(
-			_In_ ULONG celt,
-			_Out_writes_to_(celt, *pceltFetched) ISetupInstance** rgelt,
-			_Out_opt_ _Deref_out_range_(0, celt) ULONG* pceltFetched
-			) = 0;
-
-	/// <summary>
-	/// Skips the next set of product instances in the enumeration sequence.
-	/// </summary>
-	/// <param name="celt">The number of product instances to skip.</param>
-	/// <returns>S_OK if the number of elements could be skipped; otherwise, S_FALSE;</returns>
-	STDMETHOD(Skip)(
-		_In_ ULONG celt
-		) = 0;
-
-	/// <summary>
-	/// Resets the enumeration sequence to the beginning.
-	/// </summary>
-	/// <returns>Always returns S_OK;</returns>
-	STDMETHOD(Reset)(void) = 0;
-
-	/// <summary>
-	/// Creates a new enumeration object in the same state as the current enumeration object: the new object points to the same place in the enumeration sequence.
-	/// </summary>
-	/// <param name="ppenum">A pointer to a pointer to a new <see cref="IEnumSetupInstances"/> interface. If the method fails, this parameter is undefined.</param>
-	/// <returns>S_OK if a clone was returned; otherwise, E_OUTOFMEMORY.</returns>
-	STDMETHOD(Clone)(
-		_Deref_out_opt_ IEnumSetupInstances** ppenum
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupConfiguration;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-
-#ifdef __GNUC__
-    __CRT_UUID_DECL(ISetupConfiguration, 0x42843719, 0xDB4C, 0x46C2, 0x8E, 0x7C, 0x64, 0xF1, 0x81, 0x6E, 0xFD, 0x5B);
-#endif
-
-	/// <summary>
-	/// Gets information about product instances installed on the machine.
-	/// </summary>
-	struct DECLSPEC_UUID("42843719-DB4C-46C2-8E7C-64F1816EFD5B") DECLSPEC_NOVTABLE ISetupConfiguration : public IUnknown
-	{
-		/// <summary>
-		/// Enumerates all launchable product instances installed.
-		/// </summary>
-		/// <param name="ppEnumInstances">An enumeration of completed, installed product instances.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(EnumInstances)(
-			_Out_ IEnumSetupInstances** ppEnumInstances
-			) = 0;
-
-	/// <summary>
-	/// Gets the instance for the current process path.
-	/// </summary>
-	/// <param name="ppInstance">The instance for the current process path.</param>
-	/// <returns>
-	/// The instance for the current process path, or E_NOTFOUND if not found.
-	/// The <see cref="ISetupInstance::GetState"/> may indicate the instance is invalid.
-	/// </returns>
-	/// <remarks>
-	/// The returned instance may not be launchable.
-	/// </remarks>
-	STDMETHOD(GetInstanceForCurrentProcess)(
-		_Out_ ISetupInstance** ppInstance
-		) = 0;
-
-	/// <summary>
-	/// Gets the instance for the given path.
-	/// </summary>
-	/// <param name="ppInstance">The instance for the given path.</param>
-	/// <returns>
-	/// The instance for the given path, or E_NOTFOUND if not found.
-	/// The <see cref="ISetupInstance::GetState"/> may indicate the instance is invalid.
-	/// </returns>
-	/// <remarks>
-	/// The returned instance may not be launchable.
-	/// </remarks>
-	STDMETHOD(GetInstanceForPath)(
-		_In_z_ LPCWSTR wzPath,
-		_Out_ ISetupInstance** ppInstance
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupConfiguration2;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Gets information about product instances.
-	/// </summary>
-	struct DECLSPEC_UUID("26AAB78C-4A60-49D6-AF3B-3C35BC93365D") DECLSPEC_NOVTABLE ISetupConfiguration2 : public ISetupConfiguration
-	{
-		/// <summary>
-		/// Enumerates all product instances.
-		/// </summary>
-		/// <param name="ppEnumInstances">An enumeration of all product instances.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(EnumAllInstances)(
-			_Out_ IEnumSetupInstances** ppEnumInstances
-			) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupPackageReference;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// A reference to a package.
-	/// </summary>
-	struct DECLSPEC_UUID("da8d8a16-b2b6-4487-a2f1-594ccccd6bf5") DECLSPEC_NOVTABLE ISetupPackageReference : public IUnknown
-	{
-		/// <summary>
-		/// Gets the general package identifier.
-		/// </summary>
-		/// <param name="pbstrId">The general package identifier.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(GetId)(
-			_Out_ BSTR* pbstrId
-			) = 0;
-
-	/// <summary>
-	/// Gets the version of the package.
-	/// </summary>
-	/// <param name="pbstrVersion">The version of the package.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetVersion)(
-		_Out_ BSTR* pbstrVersion
-		) = 0;
-
-	/// <summary>
-	/// Gets the target process architecture of the package.
-	/// </summary>
-	/// <param name="pbstrChip">The target process architecture of the package.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetChip)(
-		_Out_ BSTR* pbstrChip
-		) = 0;
-
-	/// <summary>
-	/// Gets the language and optional region identifier.
-	/// </summary>
-	/// <param name="pbstrLanguage">The language and optional region identifier.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetLanguage)(
-		_Out_ BSTR* pbstrLanguage
-		) = 0;
-
-	/// <summary>
-	/// Gets the build branch of the package.
-	/// </summary>
-	/// <param name="pbstrBranch">The build branch of the package.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetBranch)(
-		_Out_ BSTR* pbstrBranch
-		) = 0;
-
-	/// <summary>
-	/// Gets the type of the package.
-	/// </summary>
-	/// <param name="pbstrType">The type of the package.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetType)(
-		_Out_ BSTR* pbstrType
-		) = 0;
-
-	/// <summary>
-	/// Gets the unique identifier consisting of all defined tokens.
-	/// </summary>
-	/// <param name="pbstrUniqueId">The unique identifier consisting of all defined tokens.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_UNEXPECTED if no Id was defined (required).</returns>
-	STDMETHOD(GetUniqueId)(
-		_Out_ BSTR* pbstrUniqueId
-		) = 0;
-
-	/// <summary>
-	/// Gets a value indicating whether the package refers to an external extension.
-	/// </summary>
-	/// <param name="pfIsExtension">A value indicating whether the package refers to an external extension.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_UNEXPECTED if no Id was defined (required).</returns>
-	STDMETHOD(GetIsExtension)(
-		_Out_ VARIANT_BOOL* pfIsExtension
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupHelper;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Helper functions.
-	/// </summary>
-	/// <remarks>
-	/// You can query for this interface from the <see cref="SetupConfiguration"/> class.
-	/// </remarks>
-	struct DECLSPEC_UUID("42b21b78-6192-463e-87bf-d577838f1d5c") DECLSPEC_NOVTABLE ISetupHelper : public IUnknown
-	{
-		/// <summary>
-		/// Parses a dotted quad version string into a 64-bit unsigned integer.
-		/// </summary>
-		/// <param name="pwszVersion">The dotted quad version string to parse, e.g. 1.2.3.4.</param>
-		/// <param name="pullVersion">A 64-bit unsigned integer representing the version. You can compare this to other versions.</param>
-		/// <returns>Standard HRESULT indicating success or failure, including E_INVALIDARG if the version is not valid.</returns>
-		STDMETHOD(ParseVersion)(
-			_In_ LPCOLESTR pwszVersion,
-			_Out_ PULONGLONG pullVersion
-			) = 0;
-
-	/// <summary>
-	/// Parses a dotted quad version string into a 64-bit unsigned integer.
-	/// </summary>
-	/// <param name="pwszVersionRange">The string containing 1 or 2 dotted quad version strings to parse, e.g. [1.0,) that means 1.0.0.0 or newer.</param>
-	/// <param name="pullMinVersion">A 64-bit unsigned integer representing the minimum version, which may be 0. You can compare this to other versions.</param>
-	/// <param name="pullMaxVersion">A 64-bit unsigned integer representing the maximum version, which may be MAXULONGLONG. You can compare this to other versions.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_INVALIDARG if the version range is not valid.</returns>
-	STDMETHOD(ParseVersionRange)(
-		_In_ LPCOLESTR pwszVersionRange,
-		_Out_ PULONGLONG pullMinVersion,
-		_Out_ PULONGLONG pullMaxVersion
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupErrorState;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Information about the error state of an instance.
-	/// </summary>
-	struct DECLSPEC_UUID("46DCCD94-A287-476A-851E-DFBC2FFDBC20") DECLSPEC_NOVTABLE ISetupErrorState : public IUnknown
-	{
-		/// <summary>
-		/// Gets an array of failed package references.
-		/// </summary>
-		/// <param name="ppsaPackages">Pointer to an array of <see cref="ISetupFailedPackageReference"/>, if packages have failed.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(GetFailedPackages)(
-			_Outptr_result_maybenull_ LPSAFEARRAY* ppsaFailedPackages
-			) = 0;
-
-	/// <summary>
-	/// Gets an array of skipped package references.
-	/// </summary>
-	/// <param name="ppsaPackages">Pointer to an array of <see cref="ISetupPackageReference"/>, if packages have been skipped.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetSkippedPackages)(
-		_Outptr_result_maybenull_ LPSAFEARRAY* ppsaSkippedPackages
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupErrorState2;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Information about the error state of an instance.
-	/// </summary>
-	struct DECLSPEC_UUID("9871385B-CA69-48F2-BC1F-7A37CBF0B1EF") DECLSPEC_NOVTABLE ISetupErrorState2 : public ISetupErrorState
-	{
-		/// <summary>
-		/// Gets the path to the error log.
-		/// </summary>
-		/// <param name="pbstrChip">The path to the error log.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(GetErrorLogFilePath)(
-			_Outptr_result_maybenull_ BSTR* pbstrErrorLogFilePath
-			) = 0;
-
-	/// <summary>
-	/// Gets the path to the main setup log.
-	/// </summary>
-	/// <param name="pbstrChip">The path to the main setup log.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetLogFilePath)(
-		_Outptr_result_maybenull_ BSTR* pbstrLogFilePath
-		) = 0;
-	};
-#endif
-
-	EXTERN_C const IID IID_ISetupFailedPackageReference;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// A reference to a failed package.
-	/// </summary>
-	struct DECLSPEC_UUID("E73559CD-7003-4022-B134-27DC650B280F") DECLSPEC_NOVTABLE ISetupFailedPackageReference : public ISetupPackageReference
-	{
-	};
-
-#endif
-
-	EXTERN_C const IID IID_ISetupFailedPackageReference2;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// A reference to a failed package.
-	/// </summary>
-	struct DECLSPEC_UUID("0FAD873E-E874-42E3-B268-4FE2F096B9CA") DECLSPEC_NOVTABLE ISetupFailedPackageReference2 : public ISetupFailedPackageReference
-	{
-		/// <summary>
-		/// Gets the path to the optional package log.
-		/// </summary>
-		/// <param name="pbstrId">The path to the optional package log.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(GetLogFilePath)(
-			_Outptr_result_maybenull_ BSTR* pbstrLogFilePath
-			) = 0;
-
-	/// <summary>
-	/// Gets the description of the package failure.
-	/// </summary>
-	/// <param name="pbstrId">The description of the package failure.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetDescription)(
-		_Outptr_result_maybenull_ BSTR* pbstrDescription
-		) = 0;
-
-	/// <summary>
-	/// Gets the signature to use for feedback reporting.
-	/// </summary>
-	/// <param name="pbstrId">The signature to use for feedback reporting.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetSignature)(
-		_Outptr_result_maybenull_ BSTR* pbstrSignature
-		) = 0;
-
-	/// <summary>
-	///  Gets the array of details for this package failure.
-	/// </summary>
-	/// <param name="ppsaDetails">Pointer to an array of details as BSTRs.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetDetails)(
-		_Out_ LPSAFEARRAY* ppsaDetails
-		) = 0;
-
-	/// <summary>
-	/// Gets an array of packages affected by this package failure.
-	/// </summary>
-	/// <param name="ppsaPackages">Pointer to an array of <see cref="ISetupPackageReference"/> for packages affected by this package failure. This may be NULL.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHOD(GetAffectedPackages)(
-		_Out_ LPSAFEARRAY* ppsaAffectedPackages
-		) = 0;
-	};
-
-#endif
-
-	EXTERN_C const IID IID_ISetupPropertyStore;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Provides named properties.
-	/// </summary>
-	/// <remarks>
-	/// You can get this from an <see cref="ISetupInstance"/>, <see cref="ISetupPackageReference"/>, or derivative.
-	/// </remarks>
-	struct DECLSPEC_UUID("C601C175-A3BE-44BC-91F6-4568D230FC83") DECLSPEC_NOVTABLE ISetupPropertyStore : public IUnknown
-	{
-		/// <summary>
-		/// Gets an array of property names in this property store.
-		/// </summary>
-		/// <param name="ppsaNames">Pointer to an array of property names as BSTRs.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(GetNames)(
-			_Out_ LPSAFEARRAY* ppsaNames
-			) = 0;
-
-	/// <summary>
-	/// Gets the value of a named property in this property store.
-	/// </summary>
-	/// <param name="pwszName">The name of the property to get.</param>
-	/// <param name="pvtValue">The value of the property.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_NOTFOUND if the property is not defined or E_NOTSUPPORTED if the property type is not supported.</returns>
-	STDMETHOD(GetValue)(
-		_In_ LPCOLESTR pwszName,
-		_Out_ LPVARIANT pvtValue
-		) = 0;
-	};
-
-#endif
-
-	EXTERN_C const IID IID_ISetupLocalizedPropertyStore;
-
-#if defined(__cplusplus) && !defined(CINTERFACE)
-	/// <summary>
-	/// Provides localized named properties.
-	/// </summary>
-	/// <remarks>
-	/// You can get this from an <see cref="ISetupLocalizedProperties"/>.
-	/// </remarks>
-	struct DECLSPEC_UUID("5BB53126-E0D5-43DF-80F1-6B161E5C6F6C") DECLSPEC_NOVTABLE ISetupLocalizedPropertyStore : public IUnknown
-	{
-		/// <summary>
-		/// Gets an array of property names in this property store.
-		/// </summary>
-		/// <param name="lcid">The LCID for the property names.</param>
-		/// <param name="ppsaNames">Pointer to an array of property names as BSTRs.</param>
-		/// <returns>Standard HRESULT indicating success or failure.</returns>
-		STDMETHOD(GetNames)(
-			_In_ LCID lcid,
-			_Out_ LPSAFEARRAY* ppsaNames
-			) = 0;
-
-	/// <summary>
-	/// Gets the value of a named property in this property store.
-	/// </summary>
-	/// <param name="pwszName">The name of the property to get.</param>
-	/// <param name="lcid">The LCID for the property.</param>
-	/// <param name="pvtValue">The value of the property.</param>
-	/// <returns>Standard HRESULT indicating success or failure, including E_NOTFOUND if the property is not defined or E_NOTSUPPORTED if the property type is not supported.</returns>
-	STDMETHOD(GetValue)(
-		_In_ LPCOLESTR pwszName,
-		_In_ LCID lcid,
-		_Out_ LPVARIANT pvtValue
-		) = 0;
-	};
-
-#endif
-
-	// Class declarations
-	//
-	EXTERN_C const CLSID CLSID_SetupConfiguration;
-
-#ifdef __cplusplus
-
-#ifdef __GNUC__
-    __CRT_UUID_DECL(SetupConfiguration, 0x177F0C4A, 0x1CD3, 0x4DE7, 0xA3, 0x2C, 0x71, 0xDB, 0xBB, 0x9F, 0xA3, 0x6D);
-#endif
-
-	/// <summary>
-	/// This class implements <see cref="ISetupConfiguration"/>, <see cref="ISetupConfiguration2"/>, and <see cref="ISetupHelper"/>.
-	/// </summary>
-	class DECLSPEC_UUID("177F0C4A-1CD3-4DE7-A32C-71DBBB9FA36D") SetupConfiguration;
-#endif
-	// Function declarations
-	//
-	/// <summary>
-	/// Gets an <see cref="ISetupConfiguration"/> that provides information about product instances installed on the machine.
-	/// </summary>
-	/// <param name="ppConfiguration">The <see cref="ISetupConfiguration"/> that provides information about product instances installed on the machine.</param>
-	/// <param name="pReserved">Reserved for future use.</param>
-	/// <returns>Standard HRESULT indicating success or failure.</returns>
-	STDMETHODIMP GetSetupConfiguration(
-		_Out_ ISetupConfiguration** ppConfiguration,
-		_Reserved_ LPVOID pReserved
-	);
-
-#ifdef __cplusplus
-}
-#endif
-
-_COM_SMARTPTR_TYPEDEF(ISetupInstance, __uuidof(ISetupInstance));
-_COM_SMARTPTR_TYPEDEF(ISetupInstance2, __uuidof(ISetupInstance2));
-_COM_SMARTPTR_TYPEDEF(IEnumSetupInstances, __uuidof(IEnumSetupInstances));
-_COM_SMARTPTR_TYPEDEF(ISetupConfiguration, __uuidof(ISetupConfiguration));
-_COM_SMARTPTR_TYPEDEF(ISetupConfiguration2, __uuidof(ISetupConfiguration2));
-_COM_SMARTPTR_TYPEDEF(ISetupHelper, __uuidof(ISetupHelper));
-_COM_SMARTPTR_TYPEDEF(ISetupPackageReference, __uuidof(ISetupPackageReference));
-_COM_SMARTPTR_TYPEDEF(ISetupPropertyStore, __uuidof(ISetupPropertyStore));
-_COM_SMARTPTR_TYPEDEF(ISetupInstanceCatalog, __uuidof(ISetupInstanceCatalog));
src/windows_sdk.cpp
@@ -1,387 +0,0 @@
-/*
- * Copyright (c) 2018 Andrew Kelley
- *
- * This file is part of zig, which is MIT licensed.
- * See http://opensource.org/licenses/MIT
- */
-
-#include "windows_sdk.h"
-
-#if defined(_WIN32)
-
-#include "windows_com.hpp"
-#include <inttypes.h>
-#include <assert.h>
-
-const char *ZIG_WINDOWS_KIT_REG_KEY = "SOFTWARE\\Microsoft\\Windows Kits\\Installed Roots";
-
-struct ZigWindowsSDKPrivate {
-    ZigWindowsSDK base;
-};
-
-enum NativeArch {
-    NativeArchArm,
-    NativeArchx86,
-    NativeArchx86_64,
-    NativeArchAarch64,
-};
-
-#if defined(_M_ARM) || defined(__arm_)
-static const NativeArch native_arch = NativeArchArm;
-#elif defined(_M_IX86) || defined(__i386__)
-static const NativeArch native_arch = NativeArchx86;
-#elif defined(_M_X64) || defined(__x86_64__)
-static const NativeArch native_arch = NativeArchx86_64;
-#elif defined(_M_ARM64) || defined(__aarch64__)
-static const NativeArch native_arch = NativeArchAarch64;
-#else
-#error unsupported architecture
-#endif
-
-void zig_free_windows_sdk(struct ZigWindowsSDK *sdk) {
-    if (sdk == nullptr) {
-        return;
-    }
-    free((void*)sdk->path10_ptr);
-    free((void*)sdk->version10_ptr);
-    free((void*)sdk->path81_ptr);
-    free((void*)sdk->version81_ptr);
-    free((void*)sdk->msvc_lib_dir_ptr);
-}
-
-static ZigFindWindowsSdkError find_msvc_lib_dir(ZigWindowsSDKPrivate *priv) {
-    //COM Smart Pointers requires explicit scope
-    {
-        HRESULT rc = CoInitializeEx(NULL, COINIT_MULTITHREADED);
-        if (rc != S_OK && rc != S_FALSE) {
-            goto com_done;
-        }
-
-        //This COM class is installed when a VS2017
-        ISetupConfigurationPtr setup_config;
-        rc = setup_config.CreateInstance(__uuidof(SetupConfiguration));
-        if (rc != S_OK) {
-            goto com_done;
-        }
-
-        IEnumSetupInstancesPtr all_instances;
-        rc = setup_config->EnumInstances(&all_instances);
-        if (rc != S_OK) {
-            goto com_done;
-        }
-
-        ISetupInstance* curr_instance;
-        ULONG found_inst;
-        while ((rc = all_instances->Next(1, &curr_instance, &found_inst) == S_OK)) {
-            BSTR bstr_inst_path;
-            rc = curr_instance->GetInstallationPath(&bstr_inst_path);
-            if (rc != S_OK) {
-                goto com_done;
-            }
-            //BSTRs are UTF-16 encoded, so we need to convert the string & adjust the length
-            //TODO call an actual function to do this
-            UINT bstr_path_len = *((UINT*)bstr_inst_path - 1);
-            ULONG tmp_path_len = bstr_path_len / 2 + 1;
-            char* conv_path = (char*)bstr_inst_path;
-            // TODO don't use alloca
-            char *tmp_path = (char*)alloca(tmp_path_len);
-            memset(tmp_path, 0, tmp_path_len);
-            uint32_t c = 0;
-            for (uint32_t i = 0; i < bstr_path_len; i += 2) {
-                tmp_path[c] = conv_path[i];
-                ++c;
-                assert(c != tmp_path_len);
-            }
-            char output_path[4096];
-            output_path[0] = 0;
-            char *out_append_ptr = output_path;
-
-            out_append_ptr += sprintf(out_append_ptr, "%s\\", tmp_path);
-
-            char tmp_buf[4096];
-            sprintf(tmp_buf, "%s%s", output_path, "VC\\Auxiliary\\Build\\Microsoft.VCToolsVersion.default.txt");
-            FILE* tools_file = fopen(tmp_buf, "rb");
-            if (!tools_file) {
-                goto com_done;
-            }
-            memset(tmp_path, 0, tmp_path_len);
-            fgets(tmp_path, tmp_path_len, tools_file);
-            strtok(tmp_path, " \r\n");
-            fclose(tools_file);
-            out_append_ptr += sprintf(out_append_ptr, "VC\\Tools\\MSVC\\%s\\lib\\", tmp_path);
-            switch (native_arch) {
-            case NativeArchx86:
-                out_append_ptr += sprintf(out_append_ptr, "x86\\");
-                break;
-            case NativeArchx86_64:
-                out_append_ptr += sprintf(out_append_ptr, "x64\\");
-                break;
-            case NativeArchArm:
-                out_append_ptr += sprintf(out_append_ptr, "arm\\");
-                break;
-            case NativeArchAarch64:
-                out_append_ptr += sprintf(out_append_ptr, "arm64\\");
-                break;
-            }
-            sprintf(tmp_buf, "%s%s", output_path, "vcruntime.lib");
-
-            if (GetFileAttributesA(tmp_buf) != INVALID_FILE_ATTRIBUTES) {
-                priv->base.msvc_lib_dir_ptr = strdup(output_path);
-                if (priv->base.msvc_lib_dir_ptr == nullptr) {
-                    return ZigFindWindowsSdkErrorOutOfMemory;
-                }
-                priv->base.msvc_lib_dir_len = strlen(priv->base.msvc_lib_dir_ptr);
-                return ZigFindWindowsSdkErrorNone;
-            }
-        }
-    }
-
-com_done:;
-    HKEY key;
-    HRESULT rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\VisualStudio\\SxS\\VS7", 0,
-        KEY_QUERY_VALUE | KEY_WOW64_32KEY, &key);
-    if (rc != ERROR_SUCCESS) {
-        return ZigFindWindowsSdkErrorNotFound;
-    }
-
-    DWORD dw_type = 0;
-    DWORD cb_data = 0;
-    rc = RegQueryValueEx(key, "14.0", NULL, &dw_type, NULL, &cb_data);
-    if ((rc == ERROR_FILE_NOT_FOUND) || (REG_SZ != dw_type)) {
-        return ZigFindWindowsSdkErrorNotFound;
-    }
-
-    char tmp_buf[4096];
-
-    RegQueryValueExA(key, "14.0", NULL, NULL, (LPBYTE)tmp_buf, &cb_data);
-    // RegQueryValueExA returns the length of the string INCLUDING the null terminator
-    char *tmp_buf_append_ptr = tmp_buf + (cb_data - 1);
-    tmp_buf_append_ptr += sprintf(tmp_buf_append_ptr, "VC\\Lib\\");
-    switch (native_arch) {
-    case NativeArchx86:
-        //x86 is in the root of the Lib folder
-        break;
-    case NativeArchx86_64:
-        tmp_buf_append_ptr += sprintf(tmp_buf_append_ptr, "amd64\\");
-        break;
-    case NativeArchArm:
-        tmp_buf_append_ptr += sprintf(tmp_buf_append_ptr, "arm\\");
-        break;
-    case NativeArchAarch64:
-        tmp_buf_append_ptr += sprintf(tmp_buf_append_ptr, "arm64\\");
-        break;
-    }
-
-    char *output_path = strdup(tmp_buf);
-    if (output_path == nullptr) {
-        return ZigFindWindowsSdkErrorOutOfMemory;
-    }
-
-    tmp_buf_append_ptr += sprintf(tmp_buf_append_ptr, "vcruntime.lib");
-
-    if (GetFileAttributesA(tmp_buf) != INVALID_FILE_ATTRIBUTES) {
-        priv->base.msvc_lib_dir_ptr = output_path;
-        priv->base.msvc_lib_dir_len = strlen(output_path);
-        return ZigFindWindowsSdkErrorNone;
-    } else {
-        free(output_path);
-        return ZigFindWindowsSdkErrorNotFound;
-    }
-}
-
-static ZigFindWindowsSdkError find_10_version(ZigWindowsSDKPrivate *priv) {
-    if (priv->base.path10_ptr == nullptr) {
-        return ZigFindWindowsSdkErrorNone;
-    }
-
-	char reg_query[MAX_PATH] = { 0 };
-	int n = snprintf(reg_query, MAX_PATH, "%s\\%s.0\\Installed Options", ZIG_WINDOWS_KIT_REG_KEY, priv->base.version10_ptr);
-	if (n < 0 || n >= MAX_PATH) {
-		return ZigFindWindowsSdkErrorPathTooLong;
-	}
-
-	HKEY options_key;
-	HRESULT rc;
-	rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, reg_query, 0,
-		KEY_QUERY_VALUE | KEY_WOW64_32KEY | KEY_ENUMERATE_SUB_KEYS, &options_key);
-	if (rc != ERROR_SUCCESS) {
-		return ZigFindWindowsSdkErrorNotFound;
-	}
-
-	const char *option_name = nullptr;
-	switch (native_arch) {
-	case NativeArchArm:
-		option_name = "OptionId.DesktopCPParm";
-		break;
-	case NativeArchAarch64:
-		option_name = "OptionId.DesktopCPParm64";
-		break;
-	case NativeArchx86_64:
-		option_name = "OptionId.DesktopCPPx64";
-		break;
-	case NativeArchx86:
-		option_name = "OptionId.DesktopCPPx86";
-		break;
-	default:
-		return ZigFindWindowsSdkErrorNotFound;
-	}
-
-	DWORD val_sz = sizeof(DWORD);
-	DWORD reg_val = 0;
-	DWORD type = REG_DWORD;
-	rc = RegQueryValueEx(options_key, option_name, NULL, &type, (LPBYTE)&reg_val, &val_sz);
-	if (rc != ERROR_SUCCESS || reg_val != 1) {
-		return ZigFindWindowsSdkErrorNotFound;
-	}
-    return ZigFindWindowsSdkErrorNone;
-}
-
-static ZigFindWindowsSdkError find_81_version(ZigWindowsSDKPrivate *priv) {
-    if (priv->base.path81_ptr == nullptr) {
-        return ZigFindWindowsSdkErrorNone;
-    }
-
-    char sdk_lib_dir[4096];
-    int n = snprintf(sdk_lib_dir, 4096, "%s\\Lib\\winv*", priv->base.path81_ptr);
-    if (n < 0 || n >= 4096) {
-        return ZigFindWindowsSdkErrorPathTooLong;
-    }
-
-    // enumerate files in sdk path looking for latest version
-    WIN32_FIND_DATA ffd;
-    HANDLE hFind = FindFirstFileA(sdk_lib_dir, &ffd);
-    if (hFind == INVALID_HANDLE_VALUE) {
-        return ZigFindWindowsSdkErrorNotFound;
-    }
-    int v0 = 0, v1 = 0;
-    for (;;) {
-        if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
-            int c0 = 0, c1 = 0;
-            sscanf(ffd.cFileName, "winv%d.%d", &c0, &c1);
-
-            if ( (c0 > v0) || (c0 == v0 && c1 > v1) ) {
-                v0 = c0, v1 = c1;
-                free((void*)priv->base.version81_ptr);
-                priv->base.version81_ptr = strdup(ffd.cFileName);
-                if (priv->base.version81_ptr == nullptr) {
-                    FindClose(hFind);
-                    return ZigFindWindowsSdkErrorOutOfMemory;
-                }
-            }
-        }
-        if (FindNextFile(hFind, &ffd) == 0) {
-            FindClose(hFind);
-            break;
-        }
-    }
-    priv->base.version81_len = strlen(priv->base.version81_ptr);
-    return ZigFindWindowsSdkErrorNone;
-}
-
-ZigFindWindowsSdkError zig_find_windows_sdk(struct ZigWindowsSDK **out_sdk) {
-    ZigWindowsSDKPrivate *priv = (ZigWindowsSDKPrivate*)calloc(1, sizeof(ZigWindowsSDKPrivate));
-    if (priv == nullptr) {
-        return ZigFindWindowsSdkErrorOutOfMemory;
-    }
-
-	HRESULT rc;
-
-	//note(dimenus): If this key doesn't exist, neither the Win 8 SDK nor the Win 10 SDK is installed
-	HKEY roots_key;
-	rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, ZIG_WINDOWS_KIT_REG_KEY, 0,
-		KEY_QUERY_VALUE | KEY_WOW64_32KEY | KEY_ENUMERATE_SUB_KEYS, &roots_key);
-	if (rc != ERROR_SUCCESS) {
-		zig_free_windows_sdk(&priv->base);
-		return ZigFindWindowsSdkErrorNotFound;
-	}
-
-    {
-		HKEY v10_key;
-		rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows\\v10.0", 0,
-			KEY_QUERY_VALUE | KEY_WOW64_32KEY | KEY_ENUMERATE_SUB_KEYS, &v10_key);
-		if (rc != ERROR_SUCCESS) {
-			goto find_win10_sdk_done;
-		}
-
-        DWORD tmp_buf_len = MAX_PATH;
-        priv->base.path10_ptr = (const char *)calloc(tmp_buf_len, 1);
-        if (priv->base.path10_ptr == nullptr) {
-            zig_free_windows_sdk(&priv->base);
-            return ZigFindWindowsSdkErrorOutOfMemory;
-        }
-        rc = RegQueryValueEx(v10_key, "InstallationFolder", NULL, NULL, (LPBYTE)priv->base.path10_ptr, &tmp_buf_len);
-        if (rc == ERROR_SUCCESS) {
-            priv->base.path10_len = tmp_buf_len - 1;
-            if (priv->base.path10_ptr[priv->base.path10_len - 1] == '\\') {
-                priv->base.path10_len -= 1;
-            }
-        } else {
-            free((void*)priv->base.path10_ptr);
-            priv->base.path10_ptr = nullptr;
-        }
-
-		priv->base.version10_ptr = (const char*)calloc(tmp_buf_len, 1);
-		rc = RegQueryValueEx(v10_key, "ProductVersion", NULL, NULL, (LPBYTE)priv->base.version10_ptr, &tmp_buf_len);
-		if (rc == ERROR_SUCCESS) {
-			snprintf((char*)priv->base.version10_ptr, MAX_PATH, "%s.0", priv->base.version10_ptr);
-			priv->base.version10_len = tmp_buf_len - 1 + 2; // note(dimenus): Microsoft doesn't include the .0 in the ProductVersion key....
-		} else {
-			free((void*)priv->base.version10_ptr);
-			priv->base.version10_ptr = nullptr;
-		}
-    }
-	find_win10_sdk_done:
-    {
-        DWORD tmp_buf_len = MAX_PATH;
-        priv->base.path81_ptr = (const char *)calloc(tmp_buf_len, 1);
-        if (priv->base.path81_ptr == nullptr) {
-            zig_free_windows_sdk(&priv->base);
-            return ZigFindWindowsSdkErrorOutOfMemory;
-        }
-        rc = RegQueryValueEx(roots_key, "KitsRoot81", NULL, NULL, (LPBYTE)priv->base.path81_ptr, &tmp_buf_len);
-        if (rc == ERROR_SUCCESS) {
-            priv->base.path81_len = tmp_buf_len - 1;
-            if (priv->base.path81_ptr[priv->base.path81_len - 1] == '\\') {
-                priv->base.path81_len -= 1;
-            }
-        } else {
-            free((void*)priv->base.path81_ptr);
-            priv->base.path81_ptr = nullptr;
-        }
-    }
-
-    {
-        ZigFindWindowsSdkError err = find_10_version(priv);
-        if (err == ZigFindWindowsSdkErrorOutOfMemory) {
-            zig_free_windows_sdk(&priv->base);
-            return err;
-        }
-    }
-    {
-        ZigFindWindowsSdkError err = find_81_version(priv);
-        if (err == ZigFindWindowsSdkErrorOutOfMemory) {
-            zig_free_windows_sdk(&priv->base);
-            return err;
-        }
-    }
-
-    {
-        ZigFindWindowsSdkError err = find_msvc_lib_dir(priv);
-        if (err == ZigFindWindowsSdkErrorOutOfMemory) {
-            zig_free_windows_sdk(&priv->base);
-            return err;
-        }
-    }
-
-    *out_sdk = &priv->base;
-    return ZigFindWindowsSdkErrorNone;
-}
-
-#else
-
-void zig_free_windows_sdk(struct ZigWindowsSDK *sdk) {}
-ZigFindWindowsSdkError zig_find_windows_sdk(struct ZigWindowsSDK **out_sdk) {
-    return ZigFindWindowsSdkErrorNotFound;
-}
-
-#endif
src/windows_sdk.h
@@ -1,51 +0,0 @@
-/*
- * Copyright (c) 2018 Andrew Kelley
- *
- * This file is part of zig, which is MIT licensed.
- * See http://opensource.org/licenses/MIT
- */
-
-#ifndef ZIG_WINDOWS_SDK_H
-#define ZIG_WINDOWS_SDK_H
-
-#ifdef __cplusplus
-#define ZIG_EXTERN_C extern "C"
-#else
-#define ZIG_EXTERN_C
-#endif
-
-#include <stddef.h>
-
-// ABI warning - src/windows_sdk.zig
-struct ZigWindowsSDK {
-    const char *path10_ptr;
-    size_t path10_len;
-
-    const char *version10_ptr;
-    size_t version10_len;
-
-    const char *path81_ptr;
-    size_t path81_len;
-
-    const char *version81_ptr;
-    size_t version81_len;
-
-    const char *msvc_lib_dir_ptr;
-    size_t msvc_lib_dir_len;
-};
-
-// ABI warning - src/windows_sdk.zig
-enum ZigFindWindowsSdkError {
-    ZigFindWindowsSdkErrorNone,
-    ZigFindWindowsSdkErrorOutOfMemory,
-    ZigFindWindowsSdkErrorNotFound,
-    ZigFindWindowsSdkErrorPathTooLong,
-};
-
-// ABI warning - src/windows_sdk.zig
-ZIG_EXTERN_C enum ZigFindWindowsSdkError zig_find_windows_sdk(struct ZigWindowsSDK **out_sdk);
-
-// ABI warning - src/windows_sdk.zig
-ZIG_EXTERN_C void zig_free_windows_sdk(struct ZigWindowsSDK *sdk);
-
-#endif
src/windows_sdk.zig
@@ -1,27 +1,755 @@
-// C API bindings for src/windows_sdk.h
-
-pub const ZigWindowsSDK = extern struct {
-    path10_ptr: ?[*]const u8,
-    path10_len: usize,
-    version10_ptr: ?[*]const u8,
-    version10_len: usize,
-    path81_ptr: ?[*]const u8,
-    path81_len: usize,
-    version81_ptr: ?[*]const u8,
-    version81_len: usize,
-    msvc_lib_dir_ptr: ?[*]const u8,
-    msvc_lib_dir_len: usize,
-
-    pub const find = zig_find_windows_sdk;
-    pub const free = zig_free_windows_sdk;
-
-    pub const FindError = enum(c_int) {
-        None,
-        OutOfMemory,
-        NotFound,
-        PathTooLong,
-    };
-
-    extern fn zig_find_windows_sdk(out_sdk: **ZigWindowsSDK) FindError;
-    extern fn zig_free_windows_sdk(sdk: *ZigWindowsSDK) void;
+const std = @import("std");
+const builtin = @import("builtin");
+
+const windows = std.os.windows;
+const RRF = windows.advapi32.RRF;
+
+const WINDOWS_KIT_REG_KEY = "SOFTWARE\\Microsoft\\Windows Kits\\Installed Roots";
+
+// https://learn.microsoft.com/en-us/windows/win32/msi/productversion
+const version_major_minor_max_length = "255.255".len;
+// note(bratishkaerik): i think ProductVersion in registry (created by Visual Studio installer) also follows this rule
+const product_version_max_length = version_major_minor_max_length + ".65535".len;
+
+/// Iterates via `iterator` and collects all folders with names starting with `optional_prefix`
+/// and similar to SemVer. Returns slice of folder names sorted in descending order.
+/// Caller owns result.
+fn iterateAndFilterBySemVer(iterator: *std.fs.IterableDir.Iterator, allocator: std.mem.Allocator, comptime optional_prefix: ?[]const u8) error{ OutOfMemory, VersionNotFound }![][]const u8 {
+    var dirs_filtered_list = std.ArrayList([]const u8).init(allocator);
+    errdefer {
+        for (dirs_filtered_list.items) |filtered_dir| allocator.free(filtered_dir);
+        dirs_filtered_list.deinit();
+    }
+
+    var normalized_name_buf: [std.fs.MAX_NAME_BYTES + ".0+build.0".len]u8 = undefined;
+    var normalized_name_fbs = std.io.fixedBufferStream(&normalized_name_buf);
+    const normalized_name_w = normalized_name_fbs.writer();
+    iterate_folder: while (true) : (normalized_name_fbs.reset()) {
+        const maybe_entry = iterator.next() catch continue :iterate_folder;
+        const entry = maybe_entry orelse break :iterate_folder;
+
+        if (entry.kind != .directory)
+            continue :iterate_folder;
+
+        // invalidated on next iteration
+        const subfolder_name = blk: {
+            if (comptime optional_prefix) |prefix| {
+                if (!std.mem.startsWith(u8, entry.name, prefix)) continue :iterate_folder;
+                break :blk entry.name[prefix.len..];
+            } else break :blk entry.name;
+        };
+
+        { // check if subfolder name looks similar to SemVer
+            switch (std.mem.count(u8, subfolder_name, ".")) {
+                0 => normalized_name_w.print("{s}.0.0+build.0", .{subfolder_name}) catch unreachable, // 17 => 17.0.0+build.0
+                1 => if (std.mem.indexOfScalar(u8, subfolder_name, '_')) |underscore_pos| blk: { // 17.0_9e9cbb98 => 17.0.1+build.9e9cbb98
+                    var subfolder_name_tmp_copy_buf: [std.fs.MAX_NAME_BYTES]u8 = undefined;
+                    const subfolder_name_tmp_copy = subfolder_name_tmp_copy_buf[0..subfolder_name.len];
+                    @memcpy(subfolder_name_tmp_copy, subfolder_name);
+
+                    subfolder_name_tmp_copy[underscore_pos] = '.'; // 17.0_9e9cbb98 => 17.0.9e9cbb98
+                    var subfolder_name_parts = std.mem.splitScalar(u8, subfolder_name_tmp_copy, '.'); // [ 17, 0, 9e9cbb98 ]
+
+                    const first = subfolder_name_parts.first(); // 17
+                    const second = subfolder_name_parts.next().?; // 0
+                    const third = subfolder_name_parts.rest(); // 9e9cbb98
+
+                    break :blk normalized_name_w.print("{s}.{s}.1+build.{s}", .{ first, second, third }) catch unreachable; // [ 17, 0, 9e9cbb98 ] => 17.0.1+build.9e9cbb98
+                } else normalized_name_w.print("{s}.0+build.0", .{subfolder_name}) catch unreachable, // 17.0 => 17.0.0+build.0
+                else => normalized_name_w.print("{s}+build.0", .{subfolder_name}) catch unreachable, // 17.0.0 => 17.0.0+build.0
+            }
+            const subfolder_name_normalized: []const u8 = normalized_name_fbs.getWritten();
+            const sem_ver = std.SemanticVersion.parse(subfolder_name_normalized);
+            _ = sem_ver catch continue :iterate_folder;
+        }
+        // entry.name passed check
+
+        const subfolder_name_allocated = try allocator.dupe(u8, subfolder_name);
+        errdefer allocator.free(subfolder_name_allocated);
+        try dirs_filtered_list.append(subfolder_name_allocated);
+    }
+
+    var dirs_filtered_slice = try dirs_filtered_list.toOwnedSlice();
+    // Keep in mind that order of these names is not guaranteed by Windows,
+    // so we cannot just reverse or "while (popOrNull())" this ArrayList.
+    std.mem.sortUnstable([]const u8, dirs_filtered_slice, {}, struct {
+        fn desc(_: void, lhs: []const u8, rhs: []const u8) bool {
+            return std.mem.order(u8, lhs, rhs) == .gt;
+        }
+    }.desc);
+    return dirs_filtered_slice;
+}
+
+const RegistryUtf8 = struct {
+    key: windows.HKEY,
+
+    /// Assert that `key` is valid UTF-8 string
+    pub fn openKey(key: []const u8) error{KeyNotFound}!RegistryUtf8 {
+        const key_utf16le: [:0]const u16 = key_utf16le: {
+            var key_utf16le_buf: [RegistryUtf16Le.key_name_max_len]u16 = undefined;
+            const key_utf16le_len: usize = std.unicode.utf8ToUtf16Le(key_utf16le_buf[0..], key) catch |err| switch (err) {
+                error.InvalidUtf8 => unreachable,
+            };
+            key_utf16le_buf[key_utf16le_len] = 0;
+            break :key_utf16le key_utf16le_buf[0..key_utf16le_len :0];
+        };
+
+        const registry_utf16le = try RegistryUtf16Le.openKey(key_utf16le);
+        return RegistryUtf8{ .key = registry_utf16le.key };
+    }
+
+    /// Closes key, after that usage is invalid
+    pub fn closeKey(self: *const RegistryUtf8) void {
+        const return_code_int: windows.HRESULT = windows.advapi32.RegCloseKey(self.key);
+        const return_code: windows.Win32Error = @enumFromInt(return_code_int);
+        switch (return_code) {
+            .SUCCESS => {},
+            else => {},
+        }
+    }
+
+    /// Get string from registry.
+    /// Caller owns result.
+    pub fn getString(self: *const RegistryUtf8, allocator: std.mem.Allocator, subkey: []const u8, value_name: []const u8) error{ OutOfMemory, ValueNameNotFound, NotAString, StringNotFound }![]u8 {
+        const subkey_utf16le: [:0]const u16 = subkey_utf16le: {
+            var subkey_utf16le_buf: [RegistryUtf16Le.key_name_max_len]u16 = undefined;
+            const subkey_utf16le_len: usize = std.unicode.utf8ToUtf16Le(subkey_utf16le_buf[0..], subkey) catch unreachable;
+            subkey_utf16le_buf[subkey_utf16le_len] = 0;
+            break :subkey_utf16le subkey_utf16le_buf[0..subkey_utf16le_len :0];
+        };
+
+        const value_name_utf16le: [:0]const u16 = value_name_utf16le: {
+            var value_name_utf16le_buf: [RegistryUtf16Le.value_name_max_len]u16 = undefined;
+            const value_name_utf16le_len: usize = std.unicode.utf8ToUtf16Le(value_name_utf16le_buf[0..], value_name) catch unreachable;
+            value_name_utf16le_buf[value_name_utf16le_len] = 0;
+            break :value_name_utf16le value_name_utf16le_buf[0..value_name_utf16le_len :0];
+        };
+
+        const registry_utf16le = RegistryUtf16Le{ .key = self.key };
+        const value_utf16le = try registry_utf16le.getString(allocator, subkey_utf16le, value_name_utf16le);
+        defer allocator.free(value_utf16le);
+
+        var value_utf8: []u8 = std.unicode.utf16leToUtf8Alloc(allocator, value_utf16le) catch |err| switch (err) {
+            error.OutOfMemory => return error.OutOfMemory,
+            else => return error.StringNotFound,
+        };
+        errdefer allocator.free(value_utf8);
+
+        return value_utf8;
+    }
+
+    /// Get DWORD (u32) from registry.
+    pub fn getDword(self: *const RegistryUtf8, subkey: []const u8, value_name: []const u8) error{ ValueNameNotFound, NotADword, DwordTooLong, DwordNotFound }!u32 {
+        const subkey_utf16le: [:0]const u16 = subkey_utf16le: {
+            var subkey_utf16le_buf: [RegistryUtf16Le.key_name_max_len]u16 = undefined;
+            const subkey_utf16le_len: usize = std.unicode.utf8ToUtf16Le(subkey_utf16le_buf[0..], subkey) catch unreachable;
+            subkey_utf16le_buf[subkey_utf16le_len] = 0;
+            break :subkey_utf16le subkey_utf16le_buf[0..subkey_utf16le_len :0];
+        };
+
+        const value_name_utf16le: [:0]const u16 = value_name_utf16le: {
+            var value_name_utf16le_buf: [RegistryUtf16Le.value_name_max_len]u16 = undefined;
+            const value_name_utf16le_len: usize = std.unicode.utf8ToUtf16Le(value_name_utf16le_buf[0..], value_name) catch unreachable;
+            value_name_utf16le_buf[value_name_utf16le_len] = 0;
+            break :value_name_utf16le value_name_utf16le_buf[0..value_name_utf16le_len :0];
+        };
+
+        const registry_utf16le = RegistryUtf16Le{ .key = self.key };
+        return try registry_utf16le.getDword(subkey_utf16le, value_name_utf16le);
+    }
+
+    /// Under private space with flags:
+    /// KEY_QUERY_VALUE and KEY_ENUMERATE_SUB_KEYS.
+    /// After finishing work, call `closeKey`.
+    pub fn loadFromPath(absolute_path: []const u8) error{KeyNotFound}!RegistryUtf8 {
+        const absolute_path_utf16le: [:0]const u16 = absolute_path_utf16le: {
+            var absolute_path_utf16le_buf: [RegistryUtf16Le.value_name_max_len]u16 = undefined;
+            const absolute_path_utf16le_len: usize = std.unicode.utf8ToUtf16Le(absolute_path_utf16le_buf[0..], absolute_path) catch unreachable;
+            absolute_path_utf16le_buf[absolute_path_utf16le_len] = 0;
+            break :absolute_path_utf16le absolute_path_utf16le_buf[0..absolute_path_utf16le_len :0];
+        };
+
+        const registry_utf16le = try RegistryUtf16Le.loadFromPath(absolute_path_utf16le);
+        return RegistryUtf8{ .key = registry_utf16le.key };
+    }
+};
+
+const RegistryUtf16Le = struct {
+    key: windows.HKEY,
+
+    /// Includes root key (f.e. HKEY_LOCAL_MACHINE).
+    /// https://learn.microsoft.com/en-us/windows/win32/sysinfo/registry-element-size-limits
+    pub const key_name_max_len = 255;
+    /// In Unicode characters.
+    /// https://learn.microsoft.com/en-us/windows/win32/sysinfo/registry-element-size-limits
+    pub const value_name_max_len = 16_383;
+
+    /// Under HKEY_LOCAL_MACHINE with flags:
+    /// KEY_QUERY_VALUE, KEY_WOW64_32KEY, and KEY_ENUMERATE_SUB_KEYS.
+    /// After finishing work, call `closeKey`.
+    fn openKey(key_utf16le: [:0]const u16) error{KeyNotFound}!RegistryUtf16Le {
+        var key: windows.HKEY = undefined;
+        const return_code_int: windows.HRESULT = windows.advapi32.RegOpenKeyExW(
+            windows.HKEY_LOCAL_MACHINE,
+            key_utf16le,
+            0,
+            windows.KEY_QUERY_VALUE | windows.KEY_WOW64_32KEY | windows.KEY_ENUMERATE_SUB_KEYS,
+            &key,
+        );
+        const return_code: windows.Win32Error = @enumFromInt(return_code_int);
+        switch (return_code) {
+            .SUCCESS => {},
+            .FILE_NOT_FOUND => return error.KeyNotFound,
+
+            else => return error.KeyNotFound,
+        }
+        return RegistryUtf16Le{ .key = key };
+    }
+
+    /// Closes key, after that usage is invalid
+    fn closeKey(self: *const RegistryUtf16Le) void {
+        const return_code_int: windows.HRESULT = windows.advapi32.RegCloseKey(self.key);
+        const return_code: windows.Win32Error = @enumFromInt(return_code_int);
+        switch (return_code) {
+            .SUCCESS => {},
+            else => {},
+        }
+    }
+
+    /// Get string ([:0]const u16) from registry.
+    fn getString(self: *const RegistryUtf16Le, allocator: std.mem.Allocator, subkey_utf16le: [:0]const u16, value_name_utf16le: [:0]const u16) error{ OutOfMemory, ValueNameNotFound, NotAString, StringNotFound }![]const u16 {
+        var actual_type: windows.ULONG = undefined;
+
+        // Calculating length to allocate
+        var value_utf16le_buf_size: u32 = 0; // in bytes, including any terminating NUL character or characters.
+        var return_code_int: windows.HRESULT = windows.advapi32.RegGetValueW(
+            self.key,
+            subkey_utf16le,
+            value_name_utf16le,
+            RRF.RT_REG_SZ,
+            &actual_type,
+            null,
+            &value_utf16le_buf_size,
+        );
+
+        // Check returned code and type
+        var return_code: windows.Win32Error = @enumFromInt(return_code_int);
+        switch (return_code) {
+            .SUCCESS => std.debug.assert(value_utf16le_buf_size != 0),
+            .MORE_DATA => unreachable, // We are only reading length
+            .FILE_NOT_FOUND => return error.ValueNameNotFound,
+            .INVALID_PARAMETER => unreachable, // We didn't combine RRF.SUBKEY_WOW6464KEY and RRF.SUBKEY_WOW6432KEY
+            else => return error.StringNotFound,
+        }
+        switch (actual_type) {
+            windows.REG.SZ => {},
+            else => return error.NotAString,
+        }
+
+        var value_utf16le_buf: []u16 = try allocator.alloc(u16, std.math.divCeil(u32, value_utf16le_buf_size, 2) catch unreachable);
+        errdefer allocator.free(value_utf16le_buf);
+
+        return_code_int = windows.advapi32.RegGetValueW(
+            self.key,
+            subkey_utf16le,
+            value_name_utf16le,
+            RRF.RT_REG_SZ,
+            &actual_type,
+            value_utf16le_buf.ptr,
+            &value_utf16le_buf_size,
+        );
+
+        // Check returned code and (just in case) type again.
+        return_code = @enumFromInt(return_code_int);
+        switch (return_code) {
+            .SUCCESS => {},
+            .MORE_DATA => unreachable, // Calculated first time length should be enough, even overestimated
+            .FILE_NOT_FOUND => return error.ValueNameNotFound,
+            .INVALID_PARAMETER => unreachable, // We didn't combine RRF.SUBKEY_WOW6464KEY and RRF.SUBKEY_WOW6432KEY
+            else => return error.StringNotFound,
+        }
+        switch (actual_type) {
+            windows.REG.SZ => {},
+            else => return error.NotAString,
+        }
+
+        const value_utf16le: []const u16 = value_utf16le: {
+            // note(bratishkaerik): somehow returned value in `buf_len` is overestimated by Windows and contains extra space
+            // we will just search for zero termination and forget length
+            // Windows sure is strange
+            const value_utf16le_overestimated: [*:0]const u16 = @ptrCast(value_utf16le_buf.ptr);
+            break :value_utf16le std.mem.span(value_utf16le_overestimated);
+        };
+
+        _ = allocator.resize(value_utf16le_buf, value_utf16le.len);
+        return value_utf16le;
+    }
+
+    /// Get DWORD (u32) from registry.
+    fn getDword(self: *const RegistryUtf16Le, subkey_utf16le: [:0]const u16, value_name_utf16le: [:0]const u16) error{ ValueNameNotFound, NotADword, DwordTooLong, DwordNotFound }!u32 {
+        var actual_type: windows.ULONG = undefined;
+        var reg_size: u32 = @sizeOf(u32);
+        var reg_value: u32 = 0;
+
+        const return_code_int: windows.HRESULT = windows.advapi32.RegGetValueW(
+            self.key,
+            subkey_utf16le,
+            value_name_utf16le,
+            RRF.RT_REG_DWORD,
+            &actual_type,
+            &reg_value,
+            &reg_size,
+        );
+        const return_code: windows.Win32Error = @enumFromInt(return_code_int);
+        switch (return_code) {
+            .SUCCESS => {},
+            .MORE_DATA => return error.DwordTooLong,
+            .FILE_NOT_FOUND => return error.ValueNameNotFound,
+            .INVALID_PARAMETER => unreachable, // We didn't combine RRF.SUBKEY_WOW6464KEY and RRF.SUBKEY_WOW6432KEY
+            else => return error.DwordNotFound,
+        }
+
+        switch (actual_type) {
+            windows.REG.DWORD => {},
+            else => return error.NotADword,
+        }
+
+        return reg_value;
+    }
+
+    /// Under private space with flags:
+    /// KEY_QUERY_VALUE and KEY_ENUMERATE_SUB_KEYS.
+    /// After finishing work, call `closeKey`.
+    fn loadFromPath(absolute_path_as_utf16le: [:0]const u16) error{KeyNotFound}!RegistryUtf16Le {
+        var key: windows.HKEY = undefined;
+
+        const return_code_int: windows.HRESULT = std.os.windows.advapi32.RegLoadAppKeyW(
+            absolute_path_as_utf16le,
+            &key,
+            windows.KEY_QUERY_VALUE | windows.KEY_ENUMERATE_SUB_KEYS,
+            0,
+            0,
+        );
+        const return_code: windows.Win32Error = @enumFromInt(return_code_int);
+        switch (return_code) {
+            .SUCCESS => {},
+            else => return error.KeyNotFound,
+        }
+
+        return RegistryUtf16Le{ .key = key };
+    }
+};
+
+pub const Windows10Sdk = struct {
+    path: []const u8,
+    version: []const u8,
+
+    /// Find path and version of Windows 10 SDK.
+    /// Caller owns the result's fields.
+    /// After finishing work, call `free(allocator)`.
+    fn find(allocator: std.mem.Allocator) error{ OutOfMemory, Windows10SdkNotFound, PathTooLong, VersionTooLong }!Windows10Sdk {
+        const v10_key = RegistryUtf8.openKey("SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows\\v10.0") catch |err| switch (err) {
+            error.KeyNotFound => return error.Windows10SdkNotFound,
+        };
+        defer v10_key.closeKey();
+
+        const path: []const u8 = path10: {
+            var path_maybe_with_trailing_slash = v10_key.getString(allocator, "", "InstallationFolder") catch |err| switch (err) {
+                error.NotAString => return error.Windows10SdkNotFound,
+                error.ValueNameNotFound => return error.Windows10SdkNotFound,
+                error.StringNotFound => return error.Windows10SdkNotFound,
+
+                error.OutOfMemory => return error.OutOfMemory,
+            };
+
+            if (path_maybe_with_trailing_slash.len > std.fs.MAX_PATH_BYTES or !std.fs.path.isAbsolute(path_maybe_with_trailing_slash)) {
+                allocator.free(path_maybe_with_trailing_slash);
+                return error.PathTooLong;
+            }
+
+            var path = std.ArrayList(u8).fromOwnedSlice(allocator, path_maybe_with_trailing_slash);
+            errdefer path.deinit();
+
+            // String might contain trailing slash, so trim it here
+            if (path.items.len > "C:\\".len and path.getLast() == '\\') _ = path.pop();
+
+            const path_without_trailing_slash = try path.toOwnedSlice();
+            break :path10 path_without_trailing_slash;
+        };
+        errdefer allocator.free(path);
+
+        const version: []const u8 = version10: {
+
+            // note(dimenus): Microsoft doesn't include the .0 in the ProductVersion key....
+            var version_without_0 = v10_key.getString(allocator, "", "ProductVersion") catch |err| switch (err) {
+                error.NotAString => return error.Windows10SdkNotFound,
+                error.ValueNameNotFound => return error.Windows10SdkNotFound,
+                error.StringNotFound => return error.Windows10SdkNotFound,
+
+                error.OutOfMemory => return error.OutOfMemory,
+            };
+            if (version_without_0.len + ".0".len > product_version_max_length) {
+                allocator.free(version_without_0);
+                return error.VersionTooLong;
+            }
+
+            var version = std.ArrayList(u8).fromOwnedSlice(allocator, version_without_0);
+            errdefer version.deinit();
+
+            try version.appendSlice(".0");
+
+            const version_with_0 = try version.toOwnedSlice();
+            break :version10 version_with_0;
+        };
+        errdefer allocator.free(version);
+
+        return Windows10Sdk{ .path = path, .version = version };
+    }
+
+    /// Check whether this version is enumerated in registry.
+    fn isValidVersion(windows10sdk: *const Windows10Sdk) bool {
+        var buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
+        const reg_query_as_utf8 = std.fmt.bufPrint(buf[0..], "{s}\\{s}\\Installed Options", .{ WINDOWS_KIT_REG_KEY, windows10sdk.version }) catch |err| switch (err) {
+            error.NoSpaceLeft => return false,
+        };
+
+        const options_key = RegistryUtf8.openKey(reg_query_as_utf8) catch |err| switch (err) {
+            error.KeyNotFound => return false,
+        };
+        defer options_key.closeKey();
+
+        const option_name = comptime switch (builtin.target.cpu.arch) {
+            .arm, .armeb => "OptionId.DesktopCPParm",
+            .aarch64 => "OptionId.DesktopCPParm64",
+            .x86_64 => "OptionId.DesktopCPPx64",
+            .x86 => "OptionId.DesktopCPPx86",
+            else => |tag| @compileError("Windows 10 SDK cannot be detected on architecture " ++ tag),
+        };
+
+        const reg_value = options_key.getDword("", option_name) catch return false;
+        return (reg_value == 1);
+    }
+
+    fn free(self: *const Windows10Sdk, allocator: std.mem.Allocator) void {
+        allocator.free(self.path);
+        allocator.free(self.version);
+    }
+};
+
+pub const Windows81Sdk = struct {
+    path: []const u8,
+    version: []const u8,
+
+    /// Find path and version of Windows 8.1 SDK.
+    /// Caller owns the result's fields.
+    /// After finishing work, call `free(allocator)`.
+    fn find(allocator: std.mem.Allocator, roots_key: *const RegistryUtf8) error{ OutOfMemory, Windows81SdkNotFound, PathTooLong, VersionTooLong }!Windows81Sdk {
+        const path: []const u8 = path81: {
+            var path_maybe_with_trailing_slash = roots_key.getString(allocator, "", "KitsRoot81") catch |err| switch (err) {
+                error.NotAString => return error.Windows81SdkNotFound,
+                error.ValueNameNotFound => return error.Windows81SdkNotFound,
+                error.StringNotFound => return error.Windows81SdkNotFound,
+
+                error.OutOfMemory => return error.OutOfMemory,
+            };
+            if (path_maybe_with_trailing_slash.len > std.fs.MAX_PATH_BYTES or !std.fs.path.isAbsolute(path_maybe_with_trailing_slash)) {
+                allocator.free(path_maybe_with_trailing_slash);
+                return error.PathTooLong;
+            }
+
+            var path = std.ArrayList(u8).fromOwnedSlice(allocator, path_maybe_with_trailing_slash);
+            errdefer path.deinit();
+
+            // String might contain trailing slash, so trim it here
+            if (path.items.len > "C:\\".len and path.getLast() == '\\') _ = path.pop();
+
+            const path_without_trailing_slash = try path.toOwnedSlice();
+            break :path81 path_without_trailing_slash;
+        };
+        errdefer allocator.free(path);
+
+        const version: []const u8 = version81: {
+            var buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
+            const sdk_lib_dir_path = std.fmt.bufPrint(buf[0..], "{s}\\Lib\\", .{path}) catch |err| switch (err) {
+                error.NoSpaceLeft => return error.PathTooLong,
+            };
+            if (!std.fs.path.isAbsolute(sdk_lib_dir_path)) return error.Windows81SdkNotFound;
+
+            // enumerate files in sdk path looking for latest version
+            var sdk_lib_dir = std.fs.openIterableDirAbsolute(sdk_lib_dir_path, .{}) catch |err| switch (err) {
+                error.NameTooLong => return error.PathTooLong,
+                else => return error.Windows81SdkNotFound,
+            };
+            defer sdk_lib_dir.close();
+
+            var iterator = sdk_lib_dir.iterate();
+            const versions = iterateAndFilterBySemVer(&iterator, allocator, "winv") catch |err| switch (err) {
+                error.OutOfMemory => return error.OutOfMemory,
+                error.VersionNotFound => return error.Windows81SdkNotFound,
+            };
+            defer {
+                for (versions) |version| allocator.free(version);
+                allocator.free(versions);
+            }
+            const latest_version = try allocator.dupe(u8, versions[0]);
+            break :version81 latest_version;
+        };
+        errdefer allocator.free(version);
+
+        return Windows81Sdk{ .path = path, .version = version };
+    }
+
+    fn free(self: *const Windows81Sdk, allocator: std.mem.Allocator) void {
+        allocator.free(self.path);
+        allocator.free(self.version);
+    }
+};
+
+pub const ZigWindowsSDK = struct {
+    windows10sdk: ?Windows10Sdk,
+    windows81sdk: ?Windows81Sdk,
+    msvc_lib_dir: ?[]const u8,
+
+    /// Find path and version of Windows 10 SDK and Windows 8.1 SDK, and find path to MSVC's `lib/` directory.
+    /// Caller owns the result's fields.
+    /// After finishing work, call `free(allocator)`.
+    pub fn find(allocator: std.mem.Allocator) error{ OutOfMemory, NotFound, PathTooLong }!ZigWindowsSDK {
+        if (builtin.os.tag != .windows) return error.NotFound;
+
+        //note(dimenus): If this key doesn't exist, neither the Win 8 SDK nor the Win 10 SDK is installed
+        const roots_key = RegistryUtf8.openKey(WINDOWS_KIT_REG_KEY) catch |err| switch (err) {
+            error.KeyNotFound => return error.NotFound,
+        };
+        defer roots_key.closeKey();
+
+        const windows10sdk: ?Windows10Sdk = blk: {
+            const windows10sdk = Windows10Sdk.find(allocator) catch |err| switch (err) {
+                error.Windows10SdkNotFound,
+                error.PathTooLong,
+                error.VersionTooLong,
+                => break :blk null,
+                error.OutOfMemory => return error.OutOfMemory,
+            };
+            const is_valid_version = windows10sdk.isValidVersion();
+            if (!is_valid_version) break :blk null;
+            break :blk windows10sdk;
+        };
+        errdefer if (windows10sdk) |*w| w.free(allocator);
+
+        const windows81sdk: ?Windows81Sdk = blk: {
+            const windows81sdk = Windows81Sdk.find(allocator, &roots_key) catch |err| switch (err) {
+                error.Windows81SdkNotFound => break :blk null,
+                error.PathTooLong => break :blk null,
+                error.VersionTooLong => break :blk null,
+                error.OutOfMemory => return error.OutOfMemory,
+            };
+            // no check
+            break :blk windows81sdk;
+        };
+        errdefer if (windows81sdk) |*w| w.free(allocator);
+
+        const msvc_lib_dir: ?[]const u8 = MsvcLibDir.find(allocator) catch |err| switch (err) {
+            error.MsvcLibDirNotFound => null,
+            error.PathTooLong => null,
+            error.OutOfMemory => return error.OutOfMemory,
+        };
+        errdefer allocator.free(msvc_lib_dir);
+
+        return ZigWindowsSDK{
+            .windows10sdk = windows10sdk,
+            .windows81sdk = windows81sdk,
+            .msvc_lib_dir = msvc_lib_dir,
+        };
+    }
+
+    pub fn free(self: *const ZigWindowsSDK, allocator: std.mem.Allocator) void {
+        if (self.windows10sdk) |*w10sdk| {
+            w10sdk.free(allocator);
+        }
+        if (self.windows81sdk) |*w81sdk| {
+            w81sdk.free(allocator);
+        }
+        if (self.msvc_lib_dir) |msvc_lib_dir| {
+            allocator.free(msvc_lib_dir);
+        }
+    }
+};
+
+const MsvcLibDir = struct {
+    // https://learn.microsoft.com/en-us/visualstudio/install/tools-for-managing-visual-studio-instances?view=vs-2022#editing-the-registry-for-a-visual-studio-instance
+    fn findViaRegistry(allocator: std.mem.Allocator) error{ OutOfMemory, PathNotFound }![]const u8 {
+
+        // %localappdata%\Microsoft\VisualStudio\
+        // %appdata%\Local\Microsoft\VisualStudio\
+        const visualstudio_folder_path = std.fs.getAppDataDir(allocator, "Microsoft\\VisualStudio\\") catch return error.PathNotFound;
+        defer allocator.free(visualstudio_folder_path);
+
+        const vs_versions: []const []const u8 = vs_versions: {
+            if (!std.fs.path.isAbsolute(visualstudio_folder_path)) return error.PathNotFound;
+            // enumerate folders that contain `privateregistry.bin`, looking for all versions
+            // f.i. %localappdata%\Microsoft\VisualStudio\17.0_9e9cbb98\
+            var visualstudio_folder = std.fs.openIterableDirAbsolute(visualstudio_folder_path, .{}) catch return error.PathNotFound;
+            defer visualstudio_folder.close();
+
+            var iterator = visualstudio_folder.iterate();
+            const versions = iterateAndFilterBySemVer(&iterator, allocator, null) catch |err| switch (err) {
+                error.OutOfMemory => return error.OutOfMemory,
+                error.VersionNotFound => return error.PathNotFound,
+            };
+            break :vs_versions versions;
+        };
+        defer {
+            for (vs_versions) |vs_version| allocator.free(vs_version);
+            allocator.free(vs_versions);
+        }
+        var config_subkey_buf: [RegistryUtf16Le.key_name_max_len * 2]u8 = undefined;
+        const source_directories: []const u8 = source_directories: for (vs_versions) |vs_version| {
+            const privateregistry_absolute_path = std.fs.path.join(allocator, &.{ visualstudio_folder_path, vs_version, "privateregistry.bin" }) catch continue;
+            defer allocator.free(privateregistry_absolute_path);
+            if (!std.fs.path.isAbsolute(privateregistry_absolute_path)) continue;
+
+            const visualstudio_registry = RegistryUtf8.loadFromPath(privateregistry_absolute_path) catch continue;
+            defer visualstudio_registry.closeKey();
+
+            const config_subkey = std.fmt.bufPrint(config_subkey_buf[0..], "Software\\Microsoft\\VisualStudio\\{s}_Config", .{vs_version}) catch unreachable;
+
+            var source_directories_value = visualstudio_registry.getString(allocator, config_subkey, "Source Directories") catch |err| switch (err) {
+                error.OutOfMemory => return error.OutOfMemory,
+                else => continue,
+            };
+            if (source_directories_value.len > (std.fs.MAX_PATH_BYTES * 30)) { // note(bratishkaerik): guessing from the fact that on my computer it has 15 pathes and at least some of them are not of max length
+                allocator.free(source_directories_value);
+                continue;
+            }
+
+            break :source_directories source_directories_value;
+        } else return error.PathNotFound;
+        defer allocator.free(source_directories);
+
+        var source_directories_splitted = std.mem.splitScalar(u8, source_directories, ';');
+
+        const msvc_dir: []const u8 = msvc_dir: {
+            var msvc_include_dir_maybe_with_trailing_slash = try allocator.dupe(u8, source_directories_splitted.first());
+
+            if (msvc_include_dir_maybe_with_trailing_slash.len > std.fs.MAX_PATH_BYTES or !std.fs.path.isAbsolute(msvc_include_dir_maybe_with_trailing_slash)) {
+                allocator.free(msvc_include_dir_maybe_with_trailing_slash);
+                return error.PathNotFound;
+            }
+
+            var msvc_dir = std.ArrayList(u8).fromOwnedSlice(allocator, msvc_include_dir_maybe_with_trailing_slash);
+            errdefer msvc_dir.deinit();
+
+            // String might contain trailing slash, so trim it here
+            if (msvc_dir.items.len > "C:\\".len and msvc_dir.getLast() == '\\') _ = msvc_dir.pop();
+
+            // Remove `\include` at the end of path
+            if (std.mem.endsWith(u8, msvc_dir.items, "\\include")) {
+                msvc_dir.shrinkRetainingCapacity(msvc_dir.items.len - "\\include".len);
+            }
+
+            const folder_with_arch = "\\Lib\\" ++ comptime switch (builtin.target.cpu.arch) {
+                .x86 => "x86",
+                .x86_64 => "x64",
+                .arm, .armeb => "arm",
+                .aarch64 => "arm64",
+                else => |tag| @compileError("MSVC lib dir cannot be detected on architecture " ++ tag),
+            };
+
+            try msvc_dir.appendSlice(folder_with_arch);
+            const msvc_dir_with_arch = try msvc_dir.toOwnedSlice();
+            break :msvc_dir msvc_dir_with_arch;
+        };
+        errdefer allocator.free(msvc_dir);
+
+        return msvc_dir;
+    }
+
+    fn findViaVs7Key(allocator: std.mem.Allocator) error{ OutOfMemory, PathNotFound }![]const u8 {
+        var base_path: std.ArrayList(u8) = base_path: {
+            try_env: {
+                var env_map = std.process.getEnvMap(allocator) catch |err| switch (err) {
+                    error.OutOfMemory => return error.OutOfMemory,
+                    else => break :try_env,
+                };
+                defer env_map.deinit();
+
+                if (env_map.get("VS140COMNTOOLS")) |VS140COMNTOOLS| {
+                    if (VS140COMNTOOLS.len < "C:\\Common7\\Tools".len) break :try_env;
+                    if (!std.fs.path.isAbsolute(VS140COMNTOOLS)) break :try_env;
+                    var list = std.ArrayList(u8).init(allocator);
+                    errdefer list.deinit();
+
+                    try list.appendSlice(VS140COMNTOOLS); // C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools
+                    // String might contain trailing slash, so trim it here
+                    if (list.items.len > "C:\\".len and list.getLast() == '\\') _ = list.pop();
+                    list.shrinkRetainingCapacity(list.items.len - "\\Common7\\Tools".len); // C:\Program Files (x86)\Microsoft Visual Studio 14.0
+                    break :base_path list;
+                }
+            }
+
+            const vs7_key = RegistryUtf8.openKey("SOFTWARE\\Microsoft\\VisualStudio\\SxS\\VS7") catch return error.PathNotFound;
+            defer vs7_key.closeKey();
+            try_vs7_key: {
+                var path_maybe_with_trailing_slash = vs7_key.getString(allocator, "", "14.0") catch |err| switch (err) {
+                    error.OutOfMemory => return error.OutOfMemory,
+                    else => break :try_vs7_key,
+                };
+
+                if (path_maybe_with_trailing_slash.len > std.fs.MAX_PATH_BYTES or !std.fs.path.isAbsolute(path_maybe_with_trailing_slash)) {
+                    allocator.free(path_maybe_with_trailing_slash);
+                    break :try_vs7_key;
+                }
+
+                var path = std.ArrayList(u8).fromOwnedSlice(allocator, path_maybe_with_trailing_slash);
+                errdefer path.deinit();
+
+                // String might contain trailing slash, so trim it here
+                if (path.items.len > "C:\\".len and path.getLast() == '\\') _ = path.pop();
+                break :base_path path;
+            }
+            return error.PathNotFound;
+        };
+        errdefer base_path.deinit();
+
+        const folder_with_arch = "\\VC\\lib\\" ++ comptime switch (builtin.target.cpu.arch) {
+            .x86 => "", //x86 is in the root of the Lib folder
+            .x86_64 => "amd64",
+            .arm, .armeb => "arm",
+            .aarch64 => "arm64",
+            else => |tag| @compileError("MSVC lib dir cannot be detected on architecture " ++ tag),
+        };
+        try base_path.appendSlice(folder_with_arch);
+
+        const full_path = try base_path.toOwnedSlice();
+        return full_path;
+    }
+
+    /// Find path to MSVC's `lib/` directory.
+    /// Caller owns the result.
+    pub fn find(allocator: std.mem.Allocator) error{ OutOfMemory, MsvcLibDirNotFound, PathTooLong }![]const u8 {
+        const full_path = MsvcLibDir.findViaRegistry(allocator) catch |err1| switch (err1) {
+            error.OutOfMemory => return error.OutOfMemory,
+            error.PathNotFound => MsvcLibDir.findViaVs7Key(allocator) catch |err2| switch (err2) {
+                error.OutOfMemory => return error.OutOfMemory,
+                error.PathNotFound => return error.MsvcLibDirNotFound,
+            },
+        };
+        errdefer allocator.free(full_path);
+        std.debug.assert(std.fs.path.isAbsolute(full_path)); // should be already handled in `findVia*`
+
+        var dir = std.fs.openDirAbsolute(full_path, .{}) catch |err| switch (err) {
+            error.NameTooLong => return error.PathTooLong,
+            else => return error.MsvcLibDirNotFound,
+        };
+        defer dir.close();
+
+        const stat = dir.statFile("vcruntime.lib") catch |err| switch (err) {
+            error.NameTooLong => return error.PathTooLong,
+            else => return error.MsvcLibDirNotFound,
+        };
+        if (stat.kind != .file)
+            return error.MsvcLibDirNotFound;
+
+        return full_path;
+    }
 };
build.zig
@@ -926,8 +926,6 @@ const zig_cpp_sources = [_][]const u8{
     "src/zig_clang_driver.cpp",
     "src/zig_clang_cc1_main.cpp",
     "src/zig_clang_cc1as_main.cpp",
-    // https://github.com/ziglang/zig/issues/6363
-    "src/windows_sdk.cpp",
 };
 
 const clang_libs = [_][]const u8{
CMakeLists.txt
@@ -193,8 +193,6 @@ set(ZIG_CPP_SOURCES
     "${CMAKE_SOURCE_DIR}/src/zig_clang_driver.cpp"
     "${CMAKE_SOURCE_DIR}/src/zig_clang_cc1_main.cpp"
     "${CMAKE_SOURCE_DIR}/src/zig_clang_cc1as_main.cpp"
-    # https://github.com/ziglang/zig/issues/6363
-    "${CMAKE_SOURCE_DIR}/src/windows_sdk.cpp"
 )
 # Needed because we use cmake, not the zig build system, to build zig2.o.
 set(ZIG_STAGE2_SOURCES