3 files changed, 224 insertions, 24 deletions

diff --git a/src/core/hle/service/am/applets/error.cpp b/src/core/hle/service/am/applets/error.cpp
new file mode 100644
index 000000000..df0408edc
--- /dev/null
+++ b/src/core/hle/service/am/applets/error.cpp
@@ -0,0 +1,177 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/frontend/applets/error.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/error.h"
+
+namespace Service::AM::Applets {
+
+#pragma pack(push, 4)
+struct ShowError {
+    u8 mode;
+    bool jump;
+    INSERT_PADDING_BYTES(4);
+    bool use_64bit_error_code;
+    INSERT_PADDING_BYTES(1);
+    u64 error_code_64;
+    u32 error_code_32;
+};
+static_assert(sizeof(ShowError) == 0x14, "ShowError has incorrect size.");
+#pragma pack(pop)
+
+struct ShowErrorRecord {
+    u8 mode;
+    bool jump;
+    INSERT_PADDING_BYTES(6);
+    u64 error_code_64;
+    u64 posix_time;
+};
+static_assert(sizeof(ShowErrorRecord) == 0x18, "ShowErrorRecord has incorrect size.");
+
+struct SystemErrorArg {
+    u8 mode;
+    bool jump;
+    INSERT_PADDING_BYTES(6);
+    u64 error_code_64;
+    std::array<char, 8> language_code;
+    std::array<char, 0x800> main_text;
+    std::array<char, 0x800> detail_text;
+};
+static_assert(sizeof(SystemErrorArg) == 0x1018, "ApplicationErrorArg has incorrect size.");
+
+struct ApplicationErrorArg {
+    u8 mode;
+    bool jump;
+    INSERT_PADDING_BYTES(6);
+    u32 error_code;
+    std::array<char, 8> language_code;
+    std::array<char, 0x800> main_text;
+    std::array<char, 0x800> detail_text;
+};
+static_assert(sizeof(ApplicationErrorArg) == 0x1014, "ApplicationErrorArg has incorrect size.");
+
+union ErrorArguments {
+    ShowError error;
+    ShowErrorRecord error_record;
+    SystemErrorArg system_error;
+    ApplicationErrorArg application_error;
+};
+
+namespace {
+template <typename T>
+void CopyArgumentData(const std::vector<u8>& data, T& variable) {
+    ASSERT(data.size() >= sizeof(T));
+    std::memcpy(&variable, data.data(), sizeof(T));
+}
+
+ResultCode Decode64BitError(u64 error) {
+    const auto description = (error >> 32) & 0x1FFF;
+    auto module = error & 0x3FF;
+    if (module >= 2000)
+        module -= 2000;
+    module &= 0x1FF;
+    return {static_cast<ErrorModule>(module), static_cast<u32>(description)};
+}
+
+} // namespace
+
+Error::Error(const Core::Frontend::ErrorApplet& frontend) : frontend(frontend) {}
+
+Error::~Error() = default;
+
+void Error::Initialize() {
+    Applet::Initialize();
+    args = std::make_unique<ErrorArguments>();
+    complete = false;
+
+    const auto storage = broker.PopNormalDataToApplet();
+    ASSERT(storage != nullptr);
+    const auto data = storage->GetData();
+
+    ASSERT(!data.empty());
+    std::memcpy(&mode, data.data(), sizeof(ErrorAppletMode));
+
+    switch (mode) {
+    case ErrorAppletMode::ShowError:
+        CopyArgumentData(data, args->error);
+        if (args->error.use_64bit_error_code) {
+            error_code = Decode64BitError(args->error.error_code_64);
+        } else {
+            error_code = ResultCode(args->error.error_code_32);
+        }
+        break;
+    case ErrorAppletMode::ShowSystemError:
+        CopyArgumentData(data, args->system_error);
+        error_code = ResultCode(Decode64BitError(args->system_error.error_code_64));
+    case ErrorAppletMode::ShowApplicationError:
+        CopyArgumentData(data, args->application_error);
+        error_code = ResultCode(args->application_error.error_code);
+        break;
+    case ErrorAppletMode::ShowErrorRecord:
+        CopyArgumentData(data, args->error_record);
+        error_code = Decode64BitError(args->error_record.error_code_64);
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented LibAppletError mode={:02X}!", static_cast<u8>(mode));
+    }
+}
+
+bool Error::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode Error::GetStatus() const {
+    return RESULT_SUCCESS;
+}
+
+void Error::ExecuteInteractive() {
+    UNREACHABLE_MSG("Unexpected interactive applet data!");
+}
+
+void Error::Execute() {
+    if (complete) {
+        return;
+    }
+
+    const auto callback = [this] { DisplayCompleted(); };
+
+    switch (mode) {
+    case ErrorAppletMode::ShowError:
+        frontend.ShowError(error_code, callback);
+        break;
+    case ErrorAppletMode::ShowSystemError:
+    case ErrorAppletMode::ShowApplicationError: {
+        const auto system = mode == ErrorAppletMode::ShowSystemError;
+        const auto& main_text =
+            system ? args->system_error.main_text : args->application_error.main_text;
+        const auto& detail_text =
+            system ? args->system_error.detail_text : args->application_error.detail_text;
+
+        frontend.ShowCustomErrorText(
+            error_code,
+            Common::StringFromFixedZeroTerminatedBuffer(main_text.data(), main_text.size()),
+            Common::StringFromFixedZeroTerminatedBuffer(detail_text.data(), detail_text.size()),
+            callback);
+        break;
+    }
+    case ErrorAppletMode::ShowErrorRecord:
+        frontend.ShowErrorWithTimestamp(
+            error_code, std::chrono::seconds{args->error_record.posix_time}, callback);
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented LibAppletError mode={:02X}!", static_cast<u8>(mode));
+        DisplayCompleted();
+    }
+}
+
+void Error::DisplayCompleted() {
+    complete = true;
+    broker.PushNormalDataFromApplet(IStorage{{}});
+    broker.SignalStateChanged();
+}
+
+} // namespace Service::AM::Applets
diff --git a/src/core/hle/service/am/applets/error.h b/src/core/hle/service/am/applets/error.h
new file mode 100644
index 000000000..fcf9caef2
--- /dev/null
+++ b/src/core/hle/service/am/applets/error.h
@@ -0,0 +1,47 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/result.h"
+#include "core/hle/service/am/applets/applets.h"
+
+namespace Service::AM::Applets {
+
+union ErrorArguments;
+
+enum class ErrorAppletMode : u8 {
+    ShowError = 0,
+    ShowSystemError = 1,
+    ShowApplicationError = 2,
+    ShowEula = 3,
+    ShowErrorPctl = 4,
+    ShowErrorRecord = 5,
+    ShowUpdateEula = 8,
+};
+
+class Error final : public Applet {
+public:
+    Error(const Core::Frontend::ErrorApplet& frontend);
+    ~Error() override;
+
+    void Initialize() override;
+
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void DisplayCompleted();
+
+private:
+    const Core::Frontend::ErrorApplet& frontend;
+    ResultCode error_code = RESULT_SUCCESS;
+    ErrorAppletMode mode;
+    std::unique_ptr<ErrorArguments> args;
+
+    bool complete;
+};
+
+} // namespace Service::AM::Applets
diff --git a/src/core/hle/service/am/applets/stub_applet.h b/src/core/hle/service/am/applets/stub_applet.h
deleted file mode 100644
index 7d8dc968d..000000000
--- a/src/core/hle/service/am/applets/stub_applet.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2018 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include "core/hle/service/am/applets/applets.h"
-
-namespace Service::AM::Applets {
-
-class StubApplet final : public Applet {
-public:
-    StubApplet();
-    ~StubApplet() override;
-
-    void Initialize() override;
-
-    bool TransactionComplete() const override;
-    ResultCode GetStatus() const override;
-    void ExecuteInteractive() override;
-    void Execute() override;
-};
-
-} // namespace Service::AM::Applets