extended time writer trait

CHANGELOG.md

@@ -8,6 +8,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # [unreleased]
 
+# [v0.8.0] 2024-02-05
+
+## Added
+
+- Added `len_written` and `to_vec` methods to the `TimeWriter` trait.
+
 # [v0.7.0] 2024-02-01
 
 # [v0.7.0-beta.4] 2024-01-23

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "spacepackets"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2021"
 rust-version = "1.61"
 authors = ["Robin Mueller <muellerr@irs.uni-stuttgart.de>"]

src/time/cds.rs

@@ -1201,6 +1201,10 @@ impl TimeWriter for TimeProvider<DaysLen16Bits> {
         }
         Ok(self.len_as_bytes())
     }
+
+    fn len_written(&self) -> usize {
+        self.len_as_bytes()
+    }
 }
 
 impl TimeWriter for TimeProvider<DaysLen24Bits> {
@@ -1221,6 +1225,10 @@ impl TimeWriter for TimeProvider<DaysLen24Bits> {
         }
         Ok(self.len_as_bytes())
     }
+
+    fn len_written(&self) -> usize {
+        self.len_as_bytes()
+    }
 }
 
 impl<DaysLenProvider: ProvidesDaysLength> PartialEq for TimeProvider<DaysLenProvider> {
@@ -2270,4 +2278,22 @@ mod tests {
             assert_eq!(first, second);
         }
     }
+
+    #[test]
+    fn test_stamp_to_vec_u16() {
+        let stamp = TimeProvider::new_with_u16_days(1, 1);
+        let stamp_vec = stamp.to_vec().unwrap();
+        let mut buf: [u8; 7] = [0; 7];
+        stamp.write_to_bytes(&mut buf).unwrap();
+        assert_eq!(stamp_vec, buf);
+    }
+
+    #[test]
+    fn test_stamp_to_vec_u24() {
+        let stamp = TimeProvider::new_with_u24_days(1, 1).unwrap();
+        let stamp_vec = stamp.to_vec().unwrap();
+        let mut buf: [u8; 10] = [0; 10];
+        stamp.write_to_bytes(&mut buf).unwrap();
+        assert_eq!(stamp_vec, buf[..stamp.len_written()]);
+    }
 }

src/time/cuc.rs

@@ -587,6 +587,10 @@ impl TimeWriter for TimeProviderCcsdsEpoch {
         }
         Ok(current_idx)
     }
+
+    fn len_written(&self) -> usize {
+        self.len_as_bytes()
+    }
 }
 
 impl CcsdsTimeProvider for TimeProviderCcsdsEpoch {
@@ -1226,4 +1230,13 @@ mod tests {
             panic!("unexpected error: {}", cuc_error);
         }
     }
+
+    #[test]
+    fn test_stamp_to_vec() {
+        let stamp = TimeProviderCcsdsEpoch::new_u16_counter(100);
+        let stamp_vec = stamp.to_vec().unwrap();
+        let mut buf: [u8; 16] = [0; 16];
+        stamp.write_to_bytes(&mut buf).unwrap();
+        assert_eq!(stamp_vec, buf[..stamp.len_written()]);
+    }
 }

src/time/mod.rs

@@ -189,9 +189,18 @@ pub fn ms_of_day(seconds_since_epoch: f64) -> u32 {
 }
 
 pub trait TimeWriter {
+    fn len_written(&self) -> usize;
+
     /// Generic function to convert write a timestamp into a raw buffer.
     /// Returns the number of written bytes on success.
     fn write_to_bytes(&self, bytes: &mut [u8]) -> Result<usize, TimestampError>;
+
+    #[cfg(feature = "alloc")]
+    fn to_vec(&self) -> Result<alloc::vec::Vec<u8>, TimestampError> {
+        let mut vec = alloc::vec![0; self.len_written()];
+        self.write_to_bytes(&mut vec)?;
+        Ok(vec)
+    }
 }
 
 pub trait TimeReader {