From c71649161ee7127d3e05bc2fba57f49173f65fcf Mon Sep 17 00:00:00 2001
From: The-Little-Wolf <116989599+The-Little-Wolf@users.noreply.github.com>
Date: Thu, 28 Nov 2024 09:52:58 -0800
Subject: [PATCH] [XAM] Implemented XamUserGetIndexFromXUID

Implement XamUserGetIndexFromXUID
---
 src/xenia/kernel/xam/xam_user.cc | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/xenia/kernel/xam/xam_user.cc b/src/xenia/kernel/xam/xam_user.cc
index d52ce361c..d1b8b6923 100644
--- a/src/xenia/kernel/xam/xam_user.cc
+++ b/src/xenia/kernel/xam/xam_user.cc
@@ -65,6 +65,24 @@ X_HRESULT_result_t XamUserGetXUID_entry(dword_t user_index, dword_t type_mask,
 }
 DECLARE_XAM_EXPORT1(XamUserGetXUID, kUserProfiles, kImplemented);
 
+dword_result_t XamUserGetIndexFromXUID_entry(qword_t xuid, dword_t flags,
+                                             pointer_t<uint32_t> index) {
+  if (!index) {
+    return X_E_INVALIDARG;
+  }
+
+  auto profile_manager = kernel_state()->xam_state()->profile_manager();
+  const uint8_t user_index =
+      profile_manager->GetUserIndexAssignedToProfile(xuid);
+  if (user_index == XUserIndexAny) {
+    return X_E_NO_SUCH_USER;
+  }
+
+  *index = user_index;
+  return X_E_SUCCESS;
+}
+DECLARE_XAM_EXPORT1(XamUserGetIndexFromXUID, kUserProfiles, kImplemented);
+
 dword_result_t XamUserGetSigninState_entry(dword_t user_index) {
   // Yield, as some games spam this.
   xe::threading::MaybeYield();