add some logging

hook/src/lib.rs

@@ -87,6 +87,11 @@ unsafe fn patch() -> Result<()> {
         return Ok(());
     }
 
+    let log_path = std::env::current_exe().unwrap().parent().unwrap().join("log.txt");
+    let mut log = std::fs::OpenOptions::new().create(true).write(true).truncate(true).open(log_path).unwrap();
+    use std::io::Write;
+    writeln!(log, "started")?;
+
     let installation_type = DRGInstallationType::from_exe_path()?;
 
     #[derive(Debug, PartialEq)]
@@ -138,9 +143,14 @@ unsafe fn patch() -> Result<()> {
        ),
     ];
 
-    let scan = patternsleuth::process::internal::read_image()?.scan(&patterns)?;
+    writeln!(log, "reading image")?;
+    let image = patternsleuth::process::internal::read_image()?;
+    writeln!(log, "starting scan")?;
+    let scan = image.scan(&patterns)?;
+    writeln!(log, "scan done")?;
 
     if let Ok(address) = scan.get_unique_sig_address(Sig::GetServerName) {
+        writeln!(log, "found GetServerName")?;
         let address = address as *const c_void;
 
         let resize_rip = address.add(53);
@@ -158,6 +168,7 @@ unsafe fn patch() -> Result<()> {
 
     if matches!(installation_type, DRGInstallationType::Steam) {
         if let Ok(address) = scan.get_unique_sig_address(Sig::Disable) {
+            writeln!(log, "found Disable")?;
             let address = (address as *mut u8).add(29);
             let patch = [0xB8, 0x01, 0x00, 0x00, 0x00];
 
@@ -195,6 +206,7 @@ unsafe fn patch() -> Result<()> {
         );
 
         if let Ok(address) = scan.get_unique_sig_address(Sig::SaveGameToSlot) {
+            writeln!(log, "found SaveGameToSlot")?;
             let address = address as *const c_void;
 
             let save_rip = address.add(39);
@@ -209,6 +221,7 @@ unsafe fn patch() -> Result<()> {
         }
 
         if let Ok(address) = scan.get_unique_sig_address(Sig::LoadGameFromMemory) {
+            writeln!(log, "found LoadGameFromMemory")?;
             let address = address as *const c_void;
             LoadGameFromMemory = Some(std::mem::transmute(address));
 
@@ -223,6 +236,7 @@ unsafe fn patch() -> Result<()> {
         }
 
         if let Ok(address) = scan.get_unique_sig_address(Sig::DoesSaveGameExist) {
+            writeln!(log, "found DoesSaveGameExist")?;
             let address = address as *const c_void;
 
             let target: FnDoesSaveGameExist = std::mem::transmute(address);