From 784e803f98eb74392ed7faf8955df7d88c9fffa2 Mon Sep 17 00:00:00 2001
From: sum2012 <consignpo@gmail.com>
Date: Sat, 30 Jan 2021 07:03:52 +0800
Subject: [PATCH] Add CRC32 calc

Fix #13964
Thanks @unknownbrackets
---
 UI/GameScreen.cpp | 29 +++++++++++++++++++++++++++++
 UI/GameScreen.h   |  4 ++++
 2 files changed, 33 insertions(+)

diff --git a/UI/GameScreen.cpp b/UI/GameScreen.cpp
index 697a2145c9..61d72a9fd7 100644
--- a/UI/GameScreen.cpp
+++ b/UI/GameScreen.cpp
@@ -40,6 +40,7 @@
 #include "UI/MiscScreens.h"
 #include "UI/MainScreen.h"
 #include "UI/BackgroundAudio.h"
+#include "Core/Reporting.h"
 
 GameScreen::GameScreen(const std::string &gamePath) : UIDialogScreenWithGameBackground(gamePath) {
 	g_BackgroundAudio.SetGame(gamePath);
@@ -48,6 +49,27 @@ GameScreen::GameScreen(const std::string &gamePath) : UIDialogScreenWithGameBack
 GameScreen::~GameScreen() {
 }
 
+template <typename I> std::string int2hexstr(I w, size_t hex_len = sizeof(I) << 1) {
+	static const char* digits = "0123456789ABCDEF";
+	std::string rc(hex_len, '0');
+	for (size_t i = 0, j = (hex_len - 1) * 4; i < hex_len; ++i, j -= 4)
+		rc[i] = digits[(w >> j) & 0x0f];
+	return rc;
+}
+
+void GameScreen::update() {
+	UIScreen::update();
+
+	// Has the user requested a CRC32?
+	if (CRC32string == "...") {
+		// Wait until the CRC32 is ready.  It might take time on some devices.
+		if (Reporting::HasCRC(gamePath_)) {
+			uint32_t crcvalue = Reporting::RetrieveCRC(gamePath_);
+			CRC32string = int2hexstr(crcvalue);
+		}
+	}
+}
+
 void GameScreen::CreateViews() {
 	std::shared_ptr<GameInfo> info = g_gameInfoCache->GetInfo(NULL, gamePath_, GAMEINFO_WANTBG | GAMEINFO_WANTSIZE);
 
@@ -143,6 +165,7 @@ void GameScreen::CreateViews() {
 	btnSetBackground_ = rightColumnItems->Add(new Choice(ga->T("Use UI background")));
 	btnSetBackground_->OnClick.Handle(this, &GameScreen::OnSetBackground);
 	btnSetBackground_->SetVisibility(V_GONE);
+	rightColumnItems->Add(new ChoiceWithValueDisplay(&CRC32string, ga->T("CRC32 CALC"), (const char*)nullptr))->OnClick.Handle(this, &GameScreen::OnDoCRC32);
 }
 
 UI::Choice *GameScreen::AddOtherChoice(UI::Choice *choice) {
@@ -265,6 +288,12 @@ UI::EventReturn GameScreen::OnCwCheat(UI::EventParams &e) {
 	return UI::EVENT_DONE;
 }
 
+UI::EventReturn GameScreen::OnDoCRC32(UI::EventParams& e) {
+	CRC32string = "...";
+	return UI::EVENT_DONE;
+}
+
+
 UI::EventReturn GameScreen::OnSwitchBack(UI::EventParams &e) {
 	TriggerFinish(DR_OK);
 	return UI::EVENT_DONE;
diff --git a/UI/GameScreen.h b/UI/GameScreen.h
index 2e7fa3f596..ca9c0793bf 100644
--- a/UI/GameScreen.h
+++ b/UI/GameScreen.h
@@ -33,6 +33,8 @@ public:
 	GameScreen(const std::string &gamePath);
 	~GameScreen();
 
+	void update() override;
+
 	void render() override;
 
 	std::string tag() const override { return "game"; }
@@ -43,6 +45,7 @@ protected:
 	void CallbackDeleteSaveData(bool yes);
 	void CallbackDeleteGame(bool yes);
 	bool isRecentGame(const std::string &gamePath);
+	std::string CRC32string = "";
 
 private:
 	UI::Choice *AddOtherChoice(UI::Choice *choice);
@@ -60,6 +63,7 @@ private:
 	UI::EventReturn OnDeleteConfig(UI::EventParams &e);
 	UI::EventReturn OnCwCheat(UI::EventParams &e);
 	UI::EventReturn OnSetBackground(UI::EventParams &e);
+	UI::EventReturn OnDoCRC32(UI::EventParams& e);
 
 	// As we load metadata in the background, we need to be able to update these after the fact.
 	UI::TextView *tvTitle_;