Improved error-applet launching handling. Updated ErrorConfig and added ErrorContext.

nx/include/switch/applets/error.h

@@ -1,24 +1,28 @@
 /**
  * @file error.h
  * @brief Wrapper for using the error LibraryApplet.
- * @author StuntHacks
+ * @author StuntHacks, yellows8
  * @copyright libnx Authors
  */
 #pragma once
 #include "../types.h"
 #include "../services/applet.h"
 
-/// Error configuration struct
+/// Error configuration struct (SystemErrorArg)
 typedef struct {
     u8 custom_text;                   ///< Whether to show a custom error message. If this is false, a default message will be shown.
     u8 unk[7];
     u32 module;                       ///< Module code.
     u32 description;                  ///< Description code.
-    u8 unk2[8];
+    u64 languageCode;
     char short_description[0x800];    ///< Short description.
-    char detailed_description[0x800]; ///< Detailed description (displayed when the user clicks,  on "Details").
+    char detailed_description[0x800]; ///< Detailed description (displayed when the user clicks, on "Details").
 } ErrorConfig;
 
+typedef struct {
+    u8 unk_x0[0x200];
+} ErrorContext;
+
 /**
  * @brief Creates an ErrorConfg struct.
  * @param c ErrorConfg struct.
@@ -37,7 +41,7 @@ void errorClose(ErrorConfig* c);
  * @brief Launches with the specified config.
  * @param c ErrorConfig struct.
  */
-void errorShow(ErrorConfig* c);
+Result errorShow(ErrorConfig* c);
 
 /**
  * @brief Sets the error module.

nx/source/applets/error.c

@@ -6,6 +6,64 @@
 #include "applets/libapplet.h"
 #include "applets/error.h"
 
+static Result _errorAppletCreate(AppletHolder* holder, const void* indata, size_t insize, const void* indata2, size_t insize2) {
+    Result rc=0;
+    LibAppletArgs commonargs;
+
+    rc = appletCreateLibraryApplet(holder, AppletId_error, LibAppletMode_AllForeground);
+    if (R_FAILED(rc)) return rc;
+
+    libappletArgsCreate(&commonargs, 0);
+    if (R_SUCCEEDED(rc)) rc = libappletArgsPush(&commonargs, holder);
+    if (R_SUCCEEDED(rc)) rc = libappletPushInData(holder, indata, insize);
+    if (R_SUCCEEDED(rc) && indata2 && insize2) rc = libappletPushInData(holder, indata2, insize2);
+
+    return rc;
+}
+
+static Result _errorRun(AppletHolder* holder) {
+    Result rc=0;
+    u8 reply[2]={0};
+    size_t transfer_size = 0;
+    u8 status=0;//Official sw doesn't use the output status.
+
+    if (R_SUCCEEDED(rc)) rc = appletHolderStart(holder);
+
+    if (R_SUCCEEDED(rc)) {
+        appletHolderJoin(holder);
+        LibAppletExitReason reason = appletHolderGetExitReason(holder);
+
+        if (reason == LibAppletExitReason_Normal) {
+            if (R_SUCCEEDED(libappletPopOutData(holder, reply, sizeof(reply), &transfer_size))) {
+                if (transfer_size != sizeof(reply)) rc = MAKERESULT(Module_Libnx, LibnxError_LibAppletBadExit);
+                if (R_SUCCEEDED(rc)) status = reply[1];
+            }
+        }
+        else if (reason == LibAppletExitReason_Canceled) {
+            status = 0;
+        }
+        else {
+            rc = MAKERESULT(Module_Libnx, LibnxError_LibAppletBadExit);
+        }
+
+        if (R_SUCCEEDED(rc) && status!=0) rc = MAKERESULT(Module_Libnx, LibnxError_LibAppletBadExit);
+    }
+
+    return rc;
+}
+
+static Result _errorShow(const void* indata, size_t insize, const void* indata2, size_t insize2) {
+    Result rc=0;
+    AppletHolder holder;
+
+    rc = _errorAppletCreate(&holder, indata, insize, indata2, insize2);
+    if (R_SUCCEEDED(rc)) rc = _errorRun(&holder);
+
+    appletHolderClose(&holder);
+
+    return rc;
+}
+
 void errorCreate(ErrorConfig* c) {
     memset(c, 0, sizeof(ErrorConfig));
     c->custom_text = false;
@@ -16,18 +74,8 @@ void errorClose(ErrorConfig* c) {
     memset(c, 0, sizeof(ErrorConfig));
 }
 
-void errorShow(ErrorConfig* c) {
-    AppletHolder err;
-    LibAppletArgs errArgs;
-
-    appletCreateLibraryApplet(&err, AppletId_error, LibAppletMode_AllForeground);
-    libappletArgsCreate(&errArgs, 1);
-    libappletArgsPush(&errArgs, &err);
-    libappletPushInData(&err, c, sizeof(ErrorConfig));
-
-    appletHolderStart(&err);
-    appletHolderJoin(&err);
-    appletHolderClose(&err);
+Result errorShow(ErrorConfig* c) {
+    return _errorShow(c, sizeof(ErrorConfig), NULL, 0);
 }
 
 void errorConfigSetModule(ErrorConfig* c, u32 code) {