ignore checksum

Author: RUEEE

README.md

@@ -29,6 +29,7 @@
 - add a ab test in th15, 123's normal
 - add roll from csv
 - add LW practice for IN
+- make IN and PCB ignore .exe checksum to avoid unexpected changes in .exe file(like using SpecialK and game crashes)
 
 ## 给 thprac 2.2.1.8 加了个实用(?) branch, 其加入的功能如下
 - 重新把解锁刷新率加回来了
@@ -61,3 +62,4 @@
 - 在绀珠传123非符后面加了个底力测试
 - 使用CSV文件随机roll东西
 - 永夜抄LW练习
+- 妖/永禁用checksum, 从而如汉化版等修改版的rep和score.dat不会导致游戏崩溃/游戏存档清零了(但是rep可能仍然会炸)

thprac/src/thprac/thprac_games.cpp

@@ -28,7 +28,6 @@ bool g_pauseBGM_06 = false;
 bool g_forceRenderCursor=false;
 bool g_testKey=false;
 bool g_disable_max_btn = true;
-bool g_disable_checksum = false;
 AdvancedIGI_Options g_adv_igi_options;
 
 bool g_useCustomFont = false;
@@ -220,19 +219,6 @@ void GameGuiInit(game_gui_impl impl, int device, int hwnd, int wndproc_addr,
     Gui::ingame_input_gen_t input_gen, int reg1, int reg2, int reg3,
     int wnd_size_flag, float x, float y)
 {
-    if (device == 0) // special for th08
-    {
-        if (LauncherCfgInit(true)) {
-            bool disable_checksum = false;
-            if (LauncherSettingGet("disable_checksum", disable_checksum) && disable_checksum) {
-                if (device == 0x17ce760) // 08
-                {
-                    g_disable_checksum = true;
-                }
-            }
-        }
-        return;
-    }
     ingame_mb_init();
     ::ImGui::CreateContext();
     g_gameGuiImpl = impl;
@@ -412,14 +398,6 @@ void GameGuiInit(game_gui_impl impl, int device, int hwnd, int wndproc_addr,
             g_disable_f10_11_13 = false;
         }
 
-        bool disable_checksum = false;
-        if (LauncherSettingGet("disable_checksum", disable_checksum) && disable_checksum) {
-            if (device == 0x17ce760) // 08
-            {
-                g_disable_checksum = true;
-            }
-        }
-
         LauncherSettingGet_KeyBind();
 
         int theme;

thprac/src/thprac/thprac_launcher_cfg.cpp

@@ -1947,7 +1947,6 @@ class THCfgGui {
     void GuiMain()
     {
         if (ImGui::CollapsingHeader(S(THPRAC_COMPATIBILITY_SETTINGS))) {
-            mDisableChecksum.Gui(S(THPRAC_DISABLE_CHECKSUM_08), S(THPRAC_DISABLE_CHECKSUM_08_DESC));
             mInitWindowPos.Gui(S(THPRAC_INIT_WINDOW_POS), S(THPRAC_INIT_WINDOW_POS_DESC));
             mDisableMaximizeBtn.Gui(S(THPRAC_DISABLE_MAXIMIZE_BTN));
             mDisableF10_11_13.Gui(S(THPRAC_DISABLE_F10_11_13));
@@ -2167,7 +2166,6 @@ class THCfgGui {
     THCfgCheckbox mTestKey { "test_key", false };
     THCfgCheckbox mUseCorrectJaFonts { "use_correct_ja_fonts", false };
     THCfgCheckbox mUseCustomFont { "use_custom_font", false };
-    THCfgCheckbox mDisableChecksum { "disable_checksum", false };
     THCfgCombo mCustomFont { "custom_font", 0, 999 };
 
     THCfgCombo mExistingGameAction { "existing_game_launch_action", 0, 3 };

thprac/src/thprac/thprac_th07.cpp

@@ -2020,6 +2020,17 @@ namespace TH07 {
     }
 
 #pragma endregion
+    EHOOK_DY(th07_checksum1, 0x43A655) // checksum read fix
+    {
+        *(DWORD*)(pCtx->Ebp + 0xC) = *(DWORD*)(pCtx->Ebp - 0x14);
+        *(DWORD*)(pCtx->Ebp + 0x10) = *(DWORD*)(pCtx->Ebp - 0x8);
+    }
+    EHOOK_DY(th07_checksum2, 0x435FBB) // checksum
+    {
+        *(DWORD*)(0x575C14) = 650752;
+        *(DWORD*)(0x575C10) = 2932163676;
+        // 1.00b
+    }
     HOOKSET_ENDDEF()
 }
 

thprac/src/thprac/thprac_th08.cpp

@@ -3,7 +3,6 @@
 #include <format>
 
 namespace THPrac {
-extern bool g_disable_checksum;
 namespace TH08 {
     using std::pair;
     struct THPracParam {
@@ -2609,18 +2608,18 @@ namespace TH08 {
                 TH08InGameInfo::singleton().mLSCCount++;
         }
     }
-    EHOOK_DY(th08_checksum, 0x44858D)
+#pragma endregion
+    EHOOK_DY(th08_checksum1, 0x448679) // checksum read fix
     {
-        static bool init = false;
-        if (!init)
-            GameGuiInit(IMPL_WIN32_DX8, 0, 0,0, Gui::INGAGME_INPUT_GEN1, 0, 0);
-        if (g_disable_checksum)
-        {
-            pCtx->Eax = 0;
-            pCtx->Eip = 0x4486B7;
-        }
+        *(DWORD*)(pCtx->Ebp + 0xC) = *(DWORD*)(pCtx->Ebp - 0x14);
+        *(DWORD*)(pCtx->Ebp + 0x10) = *(DWORD*)(pCtx->Ebp - 0x8);
+    }
+    EHOOK_DY(th08_checksum2, 0x443836) // checksum
+    {
+        *(DWORD*)(0x17CEAB0) = 840704;
+        *(DWORD*)(0x17CEAAC) = 2724749753;
+        // 1.00d
     }
-#pragma endregion
     HOOKSET_ENDDEF()
 }