Fix length reading and remove tmp logging

src/additional_rfactor.rs

@@ -55,15 +55,6 @@ impl rF2Telemetry {
     }
 }
 
-impl From<&[u8]> for rF2Telemetry {
-    fn from(value: &[u8]) -> Self {
-        debug_assert!(value.len() == Self::SIZE);
-        let fixed_size: [u8; Self::SIZE] = value.try_into().unwrap();
-
-        unsafe { mem::transmute(fixed_size) }
-    }
-}
-
 impl From<&[u8]> for ScoringInfoV01 {
     fn from(value: &[u8]) -> Self {
         debug_assert!(value.len() == mem::size_of::<Self>());
@@ -73,6 +64,25 @@ impl From<&[u8]> for ScoringInfoV01 {
     }
 }
 
+macro_rules! vec_from_raw {
+    ($ty:ty, $raw:ident) => {{
+        const SIZE: usize = std::mem::size_of::<$ty>();
+        let count = $raw.len() / SIZE;
+
+        debug_assert_eq!($raw.len(), count * SIZE);
+
+        let mut v = Vec::with_capacity(count);
+
+        for i in 0..count {
+            let tmp: [u8; SIZE] = $raw[i * SIZE..(i + 1) * SIZE].try_into().unwrap();
+
+            v.push(unsafe { std::mem::transmute(tmp) });
+        }
+
+        v
+    }};
+}
+
 impl From<&[u8]> for VehicleScoringInfoV01 {
     fn from(value: &[u8]) -> Self {
         debug_assert!(value.len() == mem::size_of::<Self>());

src/lib.rs

@@ -1,3 +1,4 @@
+#[macro_use]
 pub mod additional_rfactor;
 #[allow(warnings)]
 mod rfactor_structs;
@@ -37,13 +38,11 @@ impl ShMReader {
     }
 
     fn check_version_update(&self) -> bool {
-        log("In ShMReader: start check version update");
         let new_version = VersionHeader::from(&self.shm[0..VersionHeader::SIZE]);
 
         let are_different = self.version.get().check_for_update(&new_version);
 
         if are_different {
-            log("In ShMReader: new version found");
             self.version.set(new_version);
         }
 
@@ -51,10 +50,7 @@ impl ShMReader {
     }
 
     fn check_time(&self, now: f32) -> bool {
-        log("In ShMReader: start time check");
-
         if now < self.last_query.get() + self.time_between_writes {
-            log("In ShMReader: time check failed");
             return false;
         }
 
@@ -64,14 +60,9 @@ impl ShMReader {
     }
 
     fn read(&self, offset: usize, length: usize) -> &[u8] {
-        log(format!(
-            "In ShMReader: read (offset: {}, length: {})",
-            offset, length
-        ));
         let b = &self.shm[offset..offset + length];
 
         debug_assert_eq!(b.len(), length);
-        log(format!("In ShMReader: successfully read {} bytes", b.len()));
 
         b
     }
@@ -92,44 +83,27 @@ impl TelemetryReader {
     }
 
     pub fn query_telemetry(&self, now: f32) -> Option<Vec<rF2VehicleTelemetry>> {
-        log("In TelemetryReader: start query telemetry");
-
         if !self.mm_reader.check_time(now) || !self.mm_reader.check_version_update() {
             return None;
         }
 
-        log("In TelemetryReader: read num vehicles");
-
         // first: query only the amount of vehicles
-        let num_vehicles = i32::from_be_bytes(
+        let num_vehicles = i32::from_ne_bytes(
             self.mm_reader
                 .read(VersionHeader::SIZE, mem::size_of::<i32>())
                 .try_into()
                 .unwrap(),
         );
 
-        log(format!(
-            "In TelemetryReader: vehicle count {}",
-            num_vehicles
-        ));
-
         debug_assert!(num_vehicles >= 0);
         debug_assert!(num_vehicles < MAX_MAPPED_VEHICLES as i32);
 
-        log("In TelemetryReader: read vehicles");
-
         // query only the required amount of memory based on vehicle count
-        let vehicles: &[rF2VehicleTelemetry] = unsafe {
+        let bytes = self.mm_reader.read(
-            mem::transmute(self.mm_reader.read(
             VersionHeader::SIZE + mem::size_of::<i32>(),
             mem::size_of::<rF2VehicleTelemetry>() * num_vehicles as usize,
-            ))
+        );
-        };
+        let vehicles = vec_from_raw!(rF2VehicleTelemetry, bytes);
-
-        log(format!(
-            "In TelemetryReader: successfully read vehicles ({})",
-            vehicles.len()
-        ));
 
         debug_assert_eq!(num_vehicles as usize, vehicles.len());
 
@@ -155,30 +129,20 @@ impl ScoringReader {
         &self,
         now: f32,
     ) -> Option<(ScoringInfoV01, Vec<VehicleScoringInfoV01>)> {
-        log("In ScoringReader: start vehicle scoring");
-
         if !self.mm_reader.check_time(now) || !self.mm_reader.check_version_update() {
             return None;
         }
 
-        log("In ScoringReader: read scoring info");
-
         let scoring_info = ScoringInfoV01::from(
             self.mm_reader
                 .read(VersionHeader::SIZE, mem::size_of::<ScoringInfoV01>()),
         );
 
-        log(format!(
+        let bytes = self.mm_reader.read(
-            "In ScoringReader: successfully read scoring info (num vehicles {})",
-            scoring_info.mNumVehicles
-        ));
-
-        let vehicle_info: &[VehicleScoringInfoV01] = unsafe {
-            mem::transmute(self.mm_reader.read(
             VersionHeader::SIZE + mem::size_of::<ScoringInfoV01>(),
             mem::size_of::<VehicleScoringInfoV01>() * scoring_info.mNumVehicles as usize,
-            ))
+        );
-        };
+        let vehicle_info = vec_from_raw!(VehicleScoringInfoV01, bytes);
 
         debug_assert_eq!(scoring_info.mNumVehicles as usize, vehicle_info.len());
 
@@ -186,22 +150,6 @@ impl ScoringReader {
     }
 }
 
-pub fn log(msg: impl ToString) {
-    let home = std::env::var("HOME").unwrap();
-    let log_file = format!("{}/rf2_vk_hud.log", home);
-
-    if let Ok(mut file) = std::fs::OpenOptions::new()
-        .append(true)
-        .create(true)
-        .open(&log_file)
-    {
-        if let Err(_) =
-            std::io::Write::write_all(&mut file, format!("{}\n", msg.to_string()).as_bytes())
-        {
-        }
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use std::{