[XAM/User] Add UserIndex enum, handle special UserIndexes inside KernelState::user_profile

src/xenia/kernel/kernel_state.cc

@@ -828,5 +828,44 @@ bool KernelState::Restore(ByteStream* stream) {
   return true;
 }
 
+xam::UserProfile* KernelState::user_profile(uint32_t user_index,
+                                            bool allow_signed_out) const {
+  auto index_enum = static_cast<xam::UserProfile::UserIndex>(user_index);
+  bool use_any_profile = index_enum == xam::UserProfile::UserIndex::kAny;
+
+  // TODO: how to handle these two cases?
+  if (index_enum == xam::UserProfile::UserIndex::kFocus) {
+    assert_always();
+    use_any_profile = true;  // temp
+  }
+  if (index_enum == xam::UserProfile::UserIndex::kNone) {
+    assert_always();
+    return nullptr;
+  }
+
+  // TODO: any callers that use kAny need to be updated so they'll apply to all
+  // profiles!
+  if (use_any_profile) {
+    for (auto& user : user_profiles_) {
+      if (allow_signed_out || user->signed_in()) {
+        return user.get();
+      }
+    }
+    return nullptr;
+  }
+
+  if (user_index >= xam::kMaxNumUsers) {
+    return nullptr;
+  }
+
+  auto user = &user_profiles_[user_index];
+  if (!allow_signed_out) {
+    if (!user->get()->signed_in()) {
+      return nullptr;
+    }
+  }
+  return user->get();
+}
+
 }  // namespace kernel
 }  // namespace xe

src/xenia/kernel/kernel_state.h

@@ -108,23 +108,7 @@ class KernelState {
   // (unless allow_signed_out is true, to allow for code dealing with sign-ins
   // etc)
   xam::UserProfile* user_profile(uint32_t user_index,
-                                 bool allow_signed_out = false) const {
+                                 bool allow_signed_out = false) const;
-    if (user_index == 0xFF) {
-      user_index = 0;
-    }
-
-    if (user_index >= xam::kMaxNumUsers) {
-      return nullptr;
-    }
-
-    auto user = &user_profiles_[user_index];
-    if (!allow_signed_out) {
-      if (!user->get()->signed_in()) {
-        return nullptr;
-      }
-    }
-    return user->get();
-  }
 
   uint32_t num_profiles() const { return xam::kMaxNumUsers; }
 

src/xenia/kernel/xam/user_profile.h

@@ -166,6 +166,12 @@ struct X_XAMACCOUNTINFO {
 
 class UserProfile {
  public:
+  enum class UserIndex {
+    kAny = 0xFF,    // applies to any or all signed-in users
+    kNone = 0xFE,   // this isn't tied to any signed-in user
+    kFocus = 0xFD,  // whichever user last acted / was last in focus
+  };
+
   static void CreateUsers(KernelState* kernel_state,
                           std::unique_ptr<UserProfile>* profiles);