Make API more inline with other time API out there

CHANGELOG.md

@@ -34,6 +34,7 @@ to check all the API changes in the **Changed** chapter.
 - `UnixTimestamp` renamed to `UnixTime`
 - `UnixTime` seconds are now private and can be retrieved using the `secs` member method.
 - `UnixTime::new` renamed to `UnixTime::new_checked`.
+- `UnixTime::secs` renamed to `UnixTime::as_secs`.
 - `UnixTime` now has a nanosecond subsecond precision. The `new` constructor now expects
    nanoseconds as the second argument.
 - Added new `UnixTime::new_subsec_millis` and `UnixTime::new_subsec_millis_checked` API
@@ -46,6 +47,7 @@ to check all the API changes in the **Changed** chapter.
 - Error handling for ECSS and time module is more granular now, with a new
   `DateBeforeCcsdsEpochError` error and a `DateBeforeCcsdsEpoch` enum variant for both
   `CdsError` and `CucError`.
+- Time API `from_now*` API renamed to `now*`.
 
 # [v0.11.0-rc.0] 2024-03-04
 

src/time/cds.rs

@@ -176,7 +176,7 @@ pub fn precision_from_pfield(pfield: u8) -> SubmillisPrecision {
 /// use spacepackets::time::cds::{CdsTime, length_of_day_segment_from_pfield, LengthOfDaySegment};
 /// use spacepackets::time::{TimeWriter, CcsdsTimeCode, CcsdsTimeProvider};
 ///
-/// let timestamp_now = CdsTime::from_now_with_u16_days().unwrap();
+/// let timestamp_now = CdsTime::now_with_u16_days().unwrap();
 /// let mut raw_stamp = [0; 7];
 /// {
 ///     let written = timestamp_now.write_to_bytes(&mut raw_stamp).unwrap();
@@ -727,14 +727,14 @@ impl<ProvidesDaysLen: ProvidesDaysLength> CdsTime<ProvidesDaysLen> {
     }
 
     #[cfg(feature = "std")]
-    fn from_now_generic(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
+    fn now_generic(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
         let conversion_from_now = ConversionFromNow::new()?;
         Self::generic_from_conversion(days_len, conversion_from_now)
             .map_err(|e| StdTimestampError::Timestamp(TimestampError::from(e)))
     }
 
     #[cfg(feature = "std")]
-    fn from_now_generic_us_prec(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
+    fn now_generic_with_us_prec(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
         let conversion_from_now = ConversionFromNow::new_with_submillis_us_prec()?;
         Self::generic_from_conversion(days_len, conversion_from_now)
             .map_err(|e| StdTimestampError::Timestamp(TimestampError::from(e)))
@@ -822,8 +822,8 @@ impl CdsTime<DaysLen24Bits> {
 
     /// Generate a time stamp from the current time using the system clock.
     #[cfg(feature = "std")]
-    pub fn from_now_with_u24_days() -> Result<Self, StdTimestampError> {
-        Self::from_now_generic(LengthOfDaySegment::Long24Bits)
+    pub fn now_with_u24_days() -> Result<Self, StdTimestampError> {
+        Self::now_generic(LengthOfDaySegment::Long24Bits)
     }
 
     /// Create a provider from a [`chrono::DateTime<chrono::Utc>`] struct.
@@ -845,7 +845,7 @@ impl CdsTime<DaysLen24Bits> {
     /// This function will return [CdsError::DateBeforeCcsdsEpoch] if the time is before the CCSDS
     /// epoch (1958-01-01T00:00:00+00:00) or the CCSDS days value exceeds the allowed bit width
     /// (24 bits).
-    pub fn from_unix_stamp_with_u24_days(
+    pub fn from_unix_time_with_u24_day(
         unix_stamp: &UnixTime,
         submillis_prec: SubmillisPrecision,
     ) -> Result<Self, CdsError> {
@@ -870,14 +870,14 @@ impl CdsTime<DaysLen24Bits> {
 
     /// Like [Self::from_now_with_u24_days] but with microsecond sub-millisecond precision.
     #[cfg(feature = "std")]
-    pub fn from_now_with_u24_days_us_precision() -> Result<Self, StdTimestampError> {
-        Self::from_now_generic_us_prec(LengthOfDaySegment::Long24Bits)
+    pub fn now_with_u24_days_us_precision() -> Result<Self, StdTimestampError> {
+        Self::now_generic_with_us_prec(LengthOfDaySegment::Long24Bits)
     }
 
     /// Like [Self::from_now_with_u24_days] but with picoseconds sub-millisecond precision.
     #[cfg(feature = "std")]
-    pub fn from_now_with_u24_days_ps_precision() -> Result<Self, StdTimestampError> {
-        Self::from_now_generic_us_prec(LengthOfDaySegment::Long24Bits)
+    pub fn now_with_u24_days_ps_precision() -> Result<Self, StdTimestampError> {
+        Self::now_generic_with_us_prec(LengthOfDaySegment::Long24Bits)
     }
 
     pub fn from_bytes_with_u24_days(buf: &[u8]) -> Result<Self, TimestampError> {
@@ -926,8 +926,8 @@ impl CdsTime<DaysLen16Bits> {
 
     /// Generate a time stamp from the current time using the system clock.
     #[cfg(feature = "std")]
-    pub fn from_now_with_u16_days() -> Result<Self, StdTimestampError> {
-        Self::from_now_generic(LengthOfDaySegment::Short16Bits)
+    pub fn now_with_u16_days() -> Result<Self, StdTimestampError> {
+        Self::now_generic(LengthOfDaySegment::Short16Bits)
     }
 
     /// Create a provider from a generic UNIX timestamp (seconds since 1970-01-01T00:00:00+00:00).
@@ -937,7 +937,7 @@ impl CdsTime<DaysLen16Bits> {
     /// This function will return [CdsError::DateBeforeCcsdsEpoch] if the time is before the CCSDS
     /// epoch (1958-01-01T00:00:00+00:00) or the CCSDS days value exceeds the allowed bit width
     /// (24 bits).
-    pub fn from_unix_stamp_with_u16_days(
+    pub fn from_unix_time_with_u16_days(
         unix_stamp: &UnixTime,
         submillis_prec: SubmillisPrecision,
     ) -> Result<Self, CdsError> {
@@ -962,8 +962,8 @@ impl CdsTime<DaysLen16Bits> {
 
     /// Like [Self::from_now_with_u16_days] but with microsecond sub-millisecond precision.
     #[cfg(feature = "std")]
-    pub fn from_now_with_u16_days_us_precision() -> Result<Self, StdTimestampError> {
-        Self::from_now_generic_us_prec(LengthOfDaySegment::Short16Bits)
+    pub fn now_with_u16_days_us_precision() -> Result<Self, StdTimestampError> {
+        Self::now_generic_with_us_prec(LengthOfDaySegment::Short16Bits)
     }
 
     /// Like [Self::from_now_with_u16_days] but with picosecond sub-millisecond precision.
@@ -1608,14 +1608,14 @@ mod tests {
 
     #[test]
     fn test_time_now() {
-        let timestamp_now = CdsTime::from_now_with_u16_days().unwrap();
+        let timestamp_now = CdsTime::now_with_u16_days().unwrap();
         let compare_stamp = chrono::Utc::now();
         generic_now_test(timestamp_now, compare_stamp);
     }
 
     #[test]
     fn test_time_now_us_prec() {
-        let timestamp_now = CdsTime::from_now_with_u16_days_us_precision().unwrap();
+        let timestamp_now = CdsTime::now_with_u16_days_us_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
         generic_now_test(timestamp_now, compare_stamp);
     }
@@ -1636,7 +1636,7 @@ mod tests {
 
     #[test]
     fn test_time_now_ps_prec_u24_days() {
-        let timestamp_now = CdsTime::from_now_with_u24_days_ps_precision().unwrap();
+        let timestamp_now = CdsTime::now_with_u24_days_ps_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
         generic_now_test(timestamp_now, compare_stamp);
     }
@@ -1921,7 +1921,7 @@ mod tests {
     fn test_creation_from_unix_stamp_0_u16_days() {
         let unix_secs = 0;
         let subsec_millis = 0;
-        let time_provider = CdsTime::from_unix_stamp_with_u16_days(
+        let time_provider = CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         )
@@ -1933,7 +1933,7 @@ mod tests {
     fn test_creation_from_unix_stamp_0_u24_days() {
         let unix_secs = 0;
         let subsec_millis = 0;
-        let time_provider = CdsTime::from_unix_stamp_with_u24_days(
+        let time_provider = CdsTime::from_unix_time_with_u24_day(
             &UnixTime::new(unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         )
@@ -1950,10 +1950,8 @@ mod tests {
             .unwrap()
             .and_local_timezone(chrono::Utc)
             .unwrap();
-        let time_provider = CdsTime::from_unix_stamp_with_u16_days(
-            &datetime_utc.into(),
-            SubmillisPrecision::Absent,
-        )
+        let time_provider =
+            CdsTime::from_unix_time_with_u16_days(&datetime_utc.into(), SubmillisPrecision::Absent)
                 .expect("creating provider from unix stamp failed");
         // https://www.timeanddate.com/date/durationresult.html?d1=01&m1=01&y1=1958&d2=14&m2=01&y2=2023
         // Leap years need to be accounted for as well.
@@ -1970,7 +1968,7 @@ mod tests {
     fn test_creation_0_ccsds_days() {
         let unix_secs = DAYS_CCSDS_TO_UNIX as i64 * SECONDS_PER_DAY as i64;
         let subsec_millis = 0;
-        let time_provider = CdsTime::from_unix_stamp_with_u16_days(
+        let time_provider = CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         )
@@ -1982,7 +1980,7 @@ mod tests {
     fn test_invalid_creation_from_unix_stamp_days_too_large() {
         let invalid_unix_secs: i64 = (u16::MAX as i64 + 1) * SECONDS_PER_DAY as i64;
         let subsec_millis = 0;
-        match CdsTime::from_unix_stamp_with_u16_days(
+        match CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(invalid_unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         ) {
@@ -2009,7 +2007,7 @@ mod tests {
         // precisely 31-12-1957 23:59:55
         let unix_secs = DAYS_CCSDS_TO_UNIX * SECONDS_PER_DAY as i32 - 5;
         let subsec_millis = 0;
-        match CdsTime::from_unix_stamp_with_u16_days(
+        match CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(unix_secs as i64, subsec_millis),
             SubmillisPrecision::Absent,
         ) {
@@ -2309,7 +2307,7 @@ mod tests {
     #[test]
     #[cfg(feature = "serde")]
     fn test_serialization() {
-        let stamp_now = CdsTime::from_now_with_u16_days().expect("Error retrieving time");
+        let stamp_now = CdsTime::now_with_u16_days().expect("Error retrieving time");
         let val = to_allocvec(&stamp_now).expect("Serializing timestamp failed");
         assert!(val.len() > 0);
         let stamp_deser: CdsTime = from_bytes(&val).expect("Stamp deserialization failed");

src/time/cuc.rs

@@ -249,7 +249,7 @@ impl FractionalPart {
 /// const LEAP_SECONDS: u32 = 37;
 ///
 /// // Highest fractional resolution
-/// let timestamp_now = CucTime::from_now(FractionalResolution::SixtyNs, LEAP_SECONDS)
+/// let timestamp_now = CucTime::now(FractionalResolution::SixtyNs, LEAP_SECONDS)
 ///     .expect("creating cuc stamp failed");
 /// let mut raw_stamp = [0; 16];
 /// {
@@ -359,7 +359,7 @@ impl CucTime {
     /// must be applied on top of the UTC based time retrieved from the system in addition to the
     /// conversion to the CCSDS epoch.
     #[cfg(feature = "std")]
-    pub fn from_now(
+    pub fn now(
         fraction_resolution: FractionalResolution,
         leap_seconds: u32,
     ) -> Result<Self, StdTimestampError> {
@@ -430,15 +430,15 @@ impl CucTime {
 
     /// Generates a CUC timestamp from a UNIX timestamp with a width of 4. This width is able
     /// to accomodate all possible UNIX timestamp values.
-    pub fn from_unix_stamp(
-        unix_stamp: &UnixTime,
+    pub fn from_unix_time(
+        unix_time: &UnixTime,
         res: FractionalResolution,
         leap_seconds: u32,
     ) -> Result<Self, CucError> {
-        let counter = unix_epoch_to_ccsds_epoch(unix_stamp.secs);
+        let counter = unix_epoch_to_ccsds_epoch(unix_time.secs);
         // Negative CCSDS epoch is invalid.
         if counter < 0 {
-            return Err(DateBeforeCcsdsEpochError(*unix_stamp).into());
+            return Err(DateBeforeCcsdsEpochError(*unix_time).into());
         }
         // We already excluded negative values, so the conversion to u64 should always work.
         let mut counter = u32::try_from(counter).map_err(|_| CucError::InvalidCounter {
@@ -449,7 +449,7 @@ impl CucTime {
             .checked_add(leap_seconds)
             .ok_or(CucError::LeapSecondCorrectionError)?;
         let fractions =
-            fractional_part_from_subsec_ns(res, unix_stamp.subsec_millis() as u64 * 10_u64.pow(6));
+            fractional_part_from_subsec_ns(res, unix_time.subsec_millis() as u64 * 10_u64.pow(6));
         Self::new_generic(WidthCounterPair(4, counter as u32), fractions)
     }
 
@@ -913,7 +913,7 @@ mod tests {
     #[test]
     fn test_datetime_now() {
         let now = chrono::Utc::now();
-        let cuc_now = CucTime::from_now(FractionalResolution::SixtyNs, LEAP_SECONDS);
+        let cuc_now = CucTime::now(FractionalResolution::SixtyNs, LEAP_SECONDS);
         assert!(cuc_now.is_ok());
         let cuc_now = cuc_now.unwrap();
         let ccsds_cuc = cuc_now.to_leap_sec_helper(LEAP_SECONDS);
@@ -1251,6 +1251,7 @@ mod tests {
         );
         assert_eq!(stamp.fractions().counter(), 0);
         let res = stamp.update_from_now(LEAP_SECONDS);
+
         assert!(res.is_ok());
     }
 
@@ -1383,7 +1384,7 @@ mod tests {
     fn from_unix_stamp() {
         let unix_stamp = UnixTime::new(0, 0);
         let cuc =
-            CucTime::from_unix_stamp(&unix_stamp, FractionalResolution::Seconds, LEAP_SECONDS)
+            CucTime::from_unix_time(&unix_stamp, FractionalResolution::Seconds, LEAP_SECONDS)
                 .expect("failed to create cuc from unix stamp");
         assert_eq!(
             cuc.counter(),

src/time/mod.rs

@@ -345,7 +345,7 @@ impl UnixTime {
     }
 
     #[cfg(feature = "std")]
-    pub fn from_now() -> Result<Self, SystemTimeError> {
+    pub fn now() -> Result<Self, SystemTimeError> {
         let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH)?;
         let epoch = now.as_secs();
         Ok(Self::new(epoch as i64, now.subsec_nanos()))
@@ -356,7 +356,7 @@ impl UnixTime {
         self.secs as f64 + (self.subsec_nanos as f64 / 1_000_000_000.0)
     }
 
-    pub fn secs(&self) -> i64 {
+    pub fn as_secs(&self) -> i64 {
         self.secs
     }
 
@@ -367,7 +367,7 @@ impl UnixTime {
 
     #[cfg(feature = "timelib")]
     pub fn timelib_date_time(&self) -> Result<time::OffsetDateTime, time::error::ComponentRange> {
-        Ok(time::OffsetDateTime::from_unix_timestamp(self.secs())?
+        Ok(time::OffsetDateTime::from_unix_timestamp(self.as_secs())?
             + time::Duration::nanoseconds(self.subsec_nanos().into()))
     }
 
@@ -649,7 +649,7 @@ mod tests {
     fn test_addition() {
         let mut stamp0 = UnixTime::new_only_secs(1);
         stamp0 += Duration::from_secs(5);
-        assert_eq!(stamp0.secs(), 6);
+        assert_eq!(stamp0.as_secs(), 6);
         assert_eq!(stamp0.subsec_millis(), 0);
         let stamp1 = stamp0 + Duration::from_millis(500);
         assert_eq!(stamp1.secs, 6);
@@ -678,7 +678,7 @@ mod tests {
 
     #[test]
     fn test_from_now() {
-        let stamp_now = UnixTime::from_now().unwrap();
+        let stamp_now = UnixTime::now().unwrap();
         let dt_now = stamp_now.chrono_date_time().unwrap();
         assert!(dt_now.year() >= 2020);
     }