add fix siege beggar satisfaction bonus mod

Author: Trolldemorted

.github/workflows/release.yml

@@ -16,6 +16,7 @@ jobs:
         mkdir mods
         mv target/i686-pc-windows-msvc/release/fix_market_hall_production_town.dll ./mods/
         mv target/i686-pc-windows-msvc/release/fix_new_settlement_ware_production.dll ./mods/
+        mv target/i686-pc-windows-msvc/release/fix_siege_beggar_satisfaction_bonus.dll ./mods/
         mv target/i686-pc-windows-msvc/release/increase_alderman_found_settlement_mission_limit.dll ./mods/
         mv target/i686-pc-windows-msvc/release/scrollmap_render_all_ships.dll ./mods/
         mv target/i686-pc-windows-msvc/release/tavern_show_all_sailors.dll ./mods/

Cargo.toml

@@ -6,6 +6,7 @@ members = [
     "cprcli",
     "mod-fix-market-hall-production-town",
     "mod-fix-new-settlement-ware-production",
+    "mod-fix-siege-beggar-satisfaction-bonus",
     "mod-increase-alderman-found-settlement-mission-limit",
     "mod-scrollmap-render-all-ships",
     "mod-tavern-show-all-sailors",

mod-fix-siege-beggar-satisfaction-bonus/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "mod-fix-siege-beggar-satisfaction-bonus"
+edition = "2021"
+version.workspace = true
+
+[lib]
+crate-type = ["cdylib"]
+name="fix_siege_beggar_satisfaction_bonus"
+
+[dependencies]
+log = { workspace = true }
+win_dbg_logger = { workspace = true }
+
+[dependencies.windows]
+version = "0.48"
+features = [
+    "Win32_Foundation",
+    "Win32_System_Memory",
+]

mod-fix-siege-beggar-satisfaction-bonus/src/ffi.rs

@@ -0,0 +1,32 @@
+use log::{debug, error};
+use windows::Win32::{
+    Foundation::{GetLastError, WIN32_ERROR},
+    System::Memory::{VirtualProtect, PAGE_EXECUTE_READWRITE, PAGE_PROTECTION_FLAGS},
+};
+
+const PATCH_ADDRESS: u32 = 0x00629A51;
+
+#[no_mangle]
+pub unsafe extern "C" fn start() -> u32 {
+    let _ = log::set_logger(&win_dbg_logger::DEBUGGER_LOGGER);
+    log::set_max_level(log::LevelFilter::Trace);
+    let patch_ptr: *mut u8 = PATCH_ADDRESS as _;
+
+    let mut old_flags: PAGE_PROTECTION_FLAGS = windows::Win32::System::Memory::PAGE_PROTECTION_FLAGS(0);
+    if !VirtualProtect(patch_ptr as _, 5, PAGE_EXECUTE_READWRITE, &mut old_flags).as_bool() {
+        let error: WIN32_ERROR = GetLastError();
+        error!("VirtualProtect PAGE_EXECUTE_READWRITE failed: {:?}", error);
+        return 1;
+    }
+
+    debug!("Patching comparison at {:#x}", PATCH_ADDRESS);
+    *patch_ptr = 0x03;
+
+    if !VirtualProtect(patch_ptr as _, 5, old_flags, &mut old_flags).as_bool() {
+        let error: WIN32_ERROR = GetLastError();
+        error!("VirtualProtect restore failed: {:?}", error);
+        return 2;
+    }
+
+    0
+}

mod-fix-siege-beggar-satisfaction-bonus/src/lib.rs

@@ -0,0 +1 @@
+pub(crate) mod ffi;