improve uwp fileio by using from app variants whereever possible

.gitignore

@@ -223,3 +223,4 @@ param.sfo
 *.elf
 *.self
 *.vpk
+/.vs

libretro-common/vfs/vfs_implementation_uwp.cpp

@@ -31,6 +31,7 @@
 #include <robuffer.h>
 #include <collection.h>
 #include <functional>
+#include <fileapifromapp.h>
 
 using namespace Windows::Foundation;
 using namespace Windows::Foundation::Collections;
@@ -388,7 +389,7 @@ libretro_vfs_implementation_file *retro_vfs_file_open_impl(
          OPEN_ALWAYS : CREATE_ALWAYS;
    }
 
-   file_handle = CreateFile2(path_str->Data(), desireAccess, FILE_SHARE_READ, creationDisposition, NULL);
+   file_handle = CreateFile2FromAppW(path_str->Data(), desireAccess, FILE_SHARE_READ, creationDisposition, NULL);
 
    if (file_handle != INVALID_HANDLE_VALUE)
    {
@@ -744,7 +745,7 @@ int retro_vfs_file_remove_impl(const char *path)
    free(path_wide);
 
    /* Try Win32 first, this should work in AppData */
-   result = DeleteFileW(path_str->Data());
+   result = DeleteFileFromAppW(path_str->Data());
    if (result)
       return 0;
 
@@ -827,6 +828,7 @@ int retro_vfs_stat_impl(const char *path, int32_t *size)
    Platform::String^ path_str;
    IStorageItem^ item;
    DWORD file_info;
+   _WIN32_FILE_ATTRIBUTE_DATA attribdata;
 
    if (!path || !*path)
       return 0;
@@ -837,21 +839,22 @@ int retro_vfs_stat_impl(const char *path, int32_t *size)
    free(path_wide);
 
    /* Try Win32 first, this should work in AppData */
-   file_info = GetFileAttributesW(path_str->Data());
+   if (GetFileAttributesExFromAppW(path_str->Data(), GetFileExInfoStandard, &attribdata))
-   if (file_info != INVALID_FILE_ATTRIBUTES)
    {
-      HANDLE file_handle = CreateFile2(path_str->Data(), GENERIC_READ, FILE_SHARE_READ, OPEN_ALWAYS, NULL);
+       file_info = attribdata.dwFileAttributes;
-      if (file_handle != INVALID_HANDLE_VALUE)
+       if (file_info != INVALID_FILE_ATTRIBUTES)
-      {
+       {
-         LARGE_INTEGER sz;
+           if (!(file_info & FILE_ATTRIBUTE_DIRECTORY))
-         if (GetFileSizeEx(file_handle, &sz))
+           {
-         {
+               LARGE_INTEGER sz;
-            if (size)
+               if (size)
-               *size = sz.QuadPart;
+               {
-         }
+                   sz.HighPart = attribdata.nFileSizeHigh;
-         CloseHandle(file_handle);
+                   sz.LowPart = attribdata.nFileSizeLow;
-      }
+               }
-      return (file_info & FILE_ATTRIBUTE_DIRECTORY) ? RETRO_VFS_STAT_IS_VALID | RETRO_VFS_STAT_IS_DIRECTORY : RETRO_VFS_STAT_IS_VALID;
+           }
+           return (file_info & FILE_ATTRIBUTE_DIRECTORY) ? RETRO_VFS_STAT_IS_VALID | RETRO_VFS_STAT_IS_DIRECTORY : RETRO_VFS_STAT_IS_VALID;
+       }
    }
 
    if (GetLastError() == ERROR_FILE_NOT_FOUND)
@@ -917,7 +920,7 @@ int retro_vfs_mkdir_impl(const char *dir)
    free(dir_local);
 
    /* Try Win32 first, this should work in AppData */
-   result = CreateDirectoryW(dir_str->Data(), NULL);
+   result = CreateDirectoryFromAppW(dir_str->Data(), NULL);
    if (result)
       return 0;
    

pkg/msvc-uwp/RetroArch-msvc2019-UWP/Package.appxmanifest

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10" xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest" xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10" xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities" IgnorableNamespaces="uap mp rescap">
-  <Identity Name="1e4cf179-f3c2-404f-b9f3-cb2070a5aad8" Publisher="CN=libretro" Version="1.9.0.0" />
+  <Identity Name="1e4cf179-f3c2-404f-b9f3-cb2070a5aad8" Publisher="CN=t3" Version="1.9.0.0" />
   <mp:PhoneIdentity PhoneProductId="1e4cf179-f3c2-404f-b9f3-cb2070a5aad8" PhonePublisherId="00000000-0000-0000-0000-000000000000" />
   <Properties>
     <DisplayName>RetroArch</DisplayName>

pkg/msvc-uwp/RetroArch-msvc2019-UWP/RetroArch-msvc2019-UWP.vcxproj

@@ -232,11 +232,12 @@
     <AppInstallerUpdateFrequency>1</AppInstallerUpdateFrequency>
     <AppInstallerCheckForUpdateFrequency>OnApplicationRun</AppInstallerCheckForUpdateFrequency>
     <AppxBundle>Always</AppxBundle>
-    <PackageCertificateThumbprint>B86DAF5EC706754FEBABD0B011B0C4C3C2F73251</PackageCertificateThumbprint>
+    <PackageCertificateThumbprint>261A18AB51F9C1DC1956AF9084285F82A2A7FD30</PackageCertificateThumbprint>
     <AppxPackageSigningTimestampDigestAlgorithm>SHA256</AppxPackageSigningTimestampDigestAlgorithm>
     <GenerateTestArtifacts>True</GenerateTestArtifacts>
     <HoursBetweenUpdateChecks>0</HoursBetweenUpdateChecks>
     <AppxPackageSigningEnabled>True</AppxPackageSigningEnabled>
+    <PackageCertificateKeyFile>RetroArch-msvc2019-UWP_TemporaryKey.pfx</PackageCertificateKeyFile>
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">
     <Link>