From 20aed4820f4c9855cb1ae3ad45beda00814d85da Mon Sep 17 00:00:00 2001
From: Lectem <lectem@gmail.com>
Date: Fri, 1 Mar 2024 17:16:26 +0100
Subject: [PATCH] Add patch template

---
 D2.Detours.patches/Template.patch.cpp | 73 +++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 D2.Detours.patches/Template.patch.cpp

diff --git a/D2.Detours.patches/Template.patch.cpp b/D2.Detours.patches/Template.patch.cpp
new file mode 100644
index 00000000..9fd30623
--- /dev/null
+++ b/D2.Detours.patches/Template.patch.cpp
@@ -0,0 +1,73 @@
+#include <DetoursPatch.h>
+
+//#define DISABLE_ALL_PATCHES
+
+#if defined(__clang__)
+#pragma clang diagnostic ignored "-Wmicrosoft-cast"
+#endif
+
+extern "C" {
+    __declspec(dllexport)
+    constexpr int __cdecl GetBaseOrdinal() { return 10'001; }
+    __declspec(dllexport)
+    constexpr int __cdecl GetLastOrdinal() { return 10'001; }
+    constexpr int GetOrdinalCount() { return GetLastOrdinal() - GetBaseOrdinal() + 1; }
+}
+
+// We are using the following letters:
+// /*C*/ to mean that the function has been "Checked" and works
+// /*B*/ to mean wean know it is "Broken" and needs fixing.
+//`     ` (spaces) to mean that it is "Unknown" wether it works or not
+
+static PatchAction patchActions[GetOrdinalCount()] = {
+		PatchAction::Ignore,                             //   ; Not exported
+};
+
+extern "C" {
+
+__declspec(dllexport)
+PatchAction __cdecl GetPatchAction(int ordinal)
+{
+#ifdef DISABLE_ALL_PATCHES
+    return PatchAction::Ignore;
+#else
+    if (ordinal < GetBaseOrdinal() || ordinal > GetLastOrdinal())
+        return PatchAction::FunctionReplacePatchByOriginal;
+    
+    static_assert(GetOrdinalCount() == (sizeof(patchActions) / sizeof(*patchActions)), "Make sure we have the right number of ordinal patch entries");
+    return ::patchActions[ordinal - GetBaseOrdinal()];
+#endif
+}
+
+static const int D2GameImageBase = 0x6FC30000;
+
+static ExtraPatchAction extraPatchActions[] = {    
+    { 0, 0, PatchAction::Ignore}, // Here because we need at least one element in the array
+};
+
+__declspec(dllexport)
+constexpr int __cdecl GetExtraPatchActionsCount() { 
+
+#ifdef DISABLE_ALL_PATCHES
+    return 0;
+#else
+    return sizeof(extraPatchActions) / sizeof(ExtraPatchAction); 
+#endif
+}
+
+__declspec(dllexport)
+ExtraPatchAction* __cdecl GetExtraPatchAction(int index)
+{
+    return &extraPatchActions[index];
+}
+
+}
+
+#include <type_traits>
+static_assert(std::is_same<decltype(GetBaseOrdinal)*, GetIntegerFunctionType>::value, "Ensure calling convention doesn't change");
+static_assert(std::is_same<decltype(GetLastOrdinal)*, GetIntegerFunctionType>::value, "Ensure calling convention doesn't change");
+static_assert(std::is_same<decltype(GetPatchAction)*, GetPatchActionType>::value, "Ensure calling convention doesn't change");
+
+
+static_assert(std::is_same<decltype(GetExtraPatchActionsCount)*, GetIntegerFunctionType>::value, "Ensure calling convention doesn't change");
+static_assert(std::is_same<decltype(GetExtraPatchAction)*, GetExtraPatchActionType>::value, "Ensure calling convention doesn't change");