Merge pull request 'Bump MSRV' (#97) from bump-msrv into main

Reviewed-on: #97

.github/workflows/ci.yml

@@ -1,42 +1,39 @@
-on: [push]
-
 name: ci
+on: [push, pull_request]
 
 jobs:
   check:
-    name: Check
+    name: Check build
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
-        with:
+      - run: cargo check --release
-          profile: minimal
-          toolchain: stable
-      - uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: --release
 
-  msrv:
+  test:
-    name: Check with MSRV
+    name: Run Tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
-        with:
+      - name: Install nextest
-          toolchain: 1.61.0
+        uses: taiki-e/install-action@nextest
-          override: true
+      - run: cargo nextest run --all-features
-          profile: minimal
+      - run: cargo test --doc
-      - uses: actions-rs/cargo@v1
+
-        with:
+  msrv:
-          command: check
+    name: Check MSRV
-          args: --release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.68.2
+      - run: cargo check --release
 
   cross-check:
-    name: Check Cross
+    name: Check Cross-Compilation
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -44,70 +41,32 @@ jobs:
           - armv7-unknown-linux-gnueabihf
           - thumbv7em-none-eabihf
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          profile: minimal
+          targets: "armv7-unknown-linux-gnueabihf, thumbv7em-none-eabihf"
-          toolchain: stable
+      - run: cargo check --release --target=${{matrix.target}} --no-default-features
-          target: ${{ matrix.target }}
-          override: true
-      - uses: actions-rs/cargo@v1
-        with:
-          use-cross: true
-          command: check
-          args: --release --target=${{ matrix.target }} --no-default-features
 
   fmt:
-    name: Rustfmt
+    name: Check formatting
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
-        with:
+      - run: cargo fmt --all -- --check
-          profile: minimal
-          toolchain: stable
-          override: true
-      - run: rustup component add rustfmt
-      - uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
 
-  check-doc:
+  docs:
     name: Check Documentation Build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@nightly
-        with:
+      - run: cargo +nightly doc --all-features --config 'build.rustdocflags=["--cfg", "docs_rs"]'
-          toolchain: nightly
-          override: true
-          profile: minimal
-      - uses: actions-rs/cargo@v1
-        with:
-          command: doc
-          args: --all-features
 
   clippy:
     name: Clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
-        with:
+      - run: cargo clippy -- -D warnings
-          profile: minimal
-          toolchain: stable
-      - run: rustup component add clippy
-      - uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: -- -D warnings
-
-  ci:
-      if: ${{ success() }}
-      # all new jobs must be added to this list
-      needs: [check, fmt, clippy]
-      runs-on: ubuntu-latest
-      steps:
-        - name: CI succeeded
-          run: exit 0

CHANGELOG.md

@@ -8,6 +8,53 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # [unreleased]
 
+# [v0.11.2] 2024-05-19
+
+- Bumped MSRV to 1.68.2
+
+## Fixed
+
+- Removed `defmt::Format` impl for `MetadataPduCreator` which seems to be problematic.
+
+# [v0.11.1] 2024-04-22
+
+## Fixed
+
+- The default data length for for `SpHeader` constructors where the data field length is not
+  specified is now 0.
+- The `SpHeader::new_from_fields` is public now.
+
+## Added
+
+- `SpHeader::to_vec` method.
+
+# [v0.11.0] 2024-04-16
+
+## Changed
+
+- Moved `CCSDS_HEADER_LEN` constant to the crate root.
+
+## Added
+
+- Added `SpacePacketHeader` type alias for `SpHeader` type.
+
+# [v0.11.0-rc.2] 2024-04-04
+
+## Changed
+
+- Renamed `PacketId` and `PacketSequenceCtrl` `new` method to `new_checked` and former
+  `new_const` method to `new`.
+- Renamed `tc`, `tm`, `tc_unseg` and `tm_unseg` variants for `PacketId` and `SpHeader`
+  to `new_for_tc_checked`, `new_for_tm_checked`, `new_for_unseg_tc_checked` and
+  `new_for_unseg_tm_checked`.
+- `PusTmCreator` and `PusTcCreator` now expect a regular instance of `SpHeader` instead of
+  a mutable reference.
+
+## Added
+
+- `SpHeader::new_from_apid` and `SpHeader::new_from_apid_checked` constructor.
+- `#[inline]` attribute for a lot of small functions.
+
 # [v0.11.0-rc.1] 2024-04-03
 
 Major API changes for the time API. If you are using the time API, it is strongly recommended

Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "spacepackets"
-version = "0.11.0-rc.1"
+version = "0.11.2"
 edition = "2021"
-rust-version = "1.61"
+rust-version = "1.68.2"
 authors = ["Robin Mueller <muellerr@irs.uni-stuttgart.de>"]
 description = "Generic implementations for various CCSDS and ECSS packet standards"
 homepage = "https://egit.irs.uni-stuttgart.de/rust/spacepackets"

README.md

@@ -29,10 +29,6 @@ Currently, this includes the following components:
 
 `spacepackets` supports various runtime environments and is also suitable for `no_std` environments.
 
-It also offers optional support for [`serde`](https://serde.rs/). This allows serializing and
-deserializing them with an appropriate `serde` provider like
-[`postcard`](https://github.com/jamesmunns/postcard).
-
 ## Default features
 
  - [`std`](https://doc.rust-lang.org/std/): Enables functionality relying on the standard library.
@@ -65,3 +61,13 @@ cargo install grcov --locked
 
 After that, you can simply run `coverage.py` to test the project with coverage. You can optionally
 supply the `--open` flag to open the coverage report in your webbrowser.
+
+# Miri
+
+You can run the [`miri`](https://github.com/rust-lang/miri) tool on this library to check for
+undefined behaviour (UB). This library does not use use any `unsafe` code blocks, but `miri` could
+still catch UB from used libraries.
+
+```sh
+cargo +nightly miri nextest run --all-features
+```

automation/Dockerfile

@@ -15,7 +15,10 @@ RUN rustup install nightly && \
     rustup target add thumbv7em-none-eabihf armv7-unknown-linux-gnueabihf && \
     rustup component add rustfmt clippy llvm-tools-preview
 
+# Get grcov
 RUN curl -sSL https://github.com/mozilla/grcov/releases/download/v0.8.19/grcov-x86_64-unknown-linux-gnu.tar.bz2 | tar -xj --directory /usr/local/bin
+# Get nextest
+RUN curl -LsSf https://get.nexte.st/latest/linux | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin
 
 # SSH stuff to allow deployment to doc server
 RUN adduser --uid 114 jenkins

automation/Jenkinsfile

@@ -31,7 +31,8 @@ pipeline {
     }
     stage('Test') {
       steps {
-        sh 'cargo test --all-features'
+        sh 'cargo nextest r --all-features'
+        sh 'cargo test --doc'
       }
     }
     stage('Check with all features') {

release-checklist.md

@@ -8,7 +8,8 @@ Checklist for new releases
 2. Bump version specifier in `Cargo.toml`.
 3. Update `CHANGELOG.md`: Convert `unreleased` section into version section with date and add new
    `unreleased` section.
-4. Run `cargo test --all-features` or `cargo nextest r --all-features`.
+4. Run `cargo test --all-features` or `cargo nextest r --all-features` together with
+   `cargo test --doc`.
 5. Run `cargo fmt` and `cargo clippy`. Check `cargo msrv` against MSRV in `Cargo.toml`.
 6. Wait for CI/CD results for EGit and Github. These also check cross-compilation for bare-metal
    targets.

src/cfdp/lv.rs

@@ -62,6 +62,7 @@ pub(crate) fn generic_len_check_deserialization(
 }
 
 impl<'data> Lv<'data> {
+    #[inline]
     pub fn new(data: &[u8]) -> Result<Lv, TlvLvError> {
         if data.len() > u8::MAX as usize {
             return Err(TlvLvError::DataTooLarge(data.len()));
@@ -73,6 +74,7 @@ impl<'data> Lv<'data> {
     }
 
     /// Creates a LV with an empty value field.
+    #[inline]
     pub fn new_empty() -> Lv<'data> {
         Lv {
             data: &[],
@@ -82,6 +84,7 @@ impl<'data> Lv<'data> {
 
     /// Helper function to build a string LV. This is especially useful for the file or directory
     /// path LVs
+    #[inline]
     pub fn new_from_str(str_slice: &str) -> Result<Lv, TlvLvError> {
         Self::new(str_slice.as_bytes())
     }
@@ -89,37 +92,44 @@ impl<'data> Lv<'data> {
     /// Helper function to build a string LV. This is especially useful for the file or directory
     /// path LVs
     #[cfg(feature = "std")]
+    #[inline]
     pub fn new_from_string(string: &'data String) -> Result<Lv<'data>, TlvLvError> {
         Self::new(string.as_bytes())
     }
 
     /// Returns the length of the value part, not including the length byte.
+    #[inline]
     pub fn len_value(&self) -> usize {
         self.data.len()
     }
 
     /// Returns the full raw length, including the length byte.
+    #[inline]
     pub fn len_full(&self) -> usize {
         self.len_value() + 1
     }
 
     /// Checks whether the value field is empty.
+    #[inline]
     pub fn is_empty(&self) -> bool {
         self.data.len() == 0
     }
 
+    #[inline]
     pub fn value(&self) -> &[u8] {
         self.data
     }
 
     /// If the LV was generated from a raw bytestream using [Self::from_bytes], the raw start
     /// of the LV can be retrieved with this method.
+    #[inline]
     pub fn raw_data(&self) -> Option<&[u8]> {
         self.raw_data
     }
 
     /// Convenience function to extract the value as a [str]. This is useful if the LV is
     /// known to contain a [str], for example being a file name.
+    #[inline]
     pub fn value_as_str(&self) -> Option<Result<&'data str, Utf8Error>> {
         if self.is_empty() {
             return None;
@@ -135,6 +145,7 @@ impl<'data> Lv<'data> {
     }
 
     /// Reads a LV  from a raw buffer.
+    #[inline]
     pub fn from_bytes(buf: &'data [u8]) -> Result<Lv<'data>, ByteConversionError> {
         generic_len_check_deserialization(buf, MIN_LV_LEN)?;
         Self::from_be_bytes_no_len_check(buf)
@@ -151,6 +162,7 @@ impl<'data> Lv<'data> {
         MIN_LV_LEN + self.data.len()
     }
 
+    #[inline]
     pub(crate) fn from_be_bytes_no_len_check(
         buf: &'data [u8],
     ) -> Result<Lv<'data>, ByteConversionError> {

src/cfdp/pdu/metadata.rs

@@ -56,7 +56,6 @@ pub fn build_metadata_opts_from_vec(
 /// This abstraction exposes a specialized API for creating metadata PDUs as specified in
 /// CFDP chapter 5.2.5.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
-#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct MetadataPduCreator<'src_name, 'dest_name, 'opts> {
     pdu_header: PduHeader,
     metadata_params: MetadataGenericParams,

src/cfdp/pdu/mod.rs

@@ -150,12 +150,14 @@ impl Error for PduError {
 }
 
 impl From<ByteConversionError> for PduError {
+    #[inline]
     fn from(value: ByteConversionError) -> Self {
         Self::ByteConversion(value)
     }
 }
 
 impl From<TlvLvError> for PduError {
+    #[inline]
     fn from(e: TlvLvError) -> Self {
         Self::TlvLvError(e)
     }
@@ -179,33 +181,42 @@ pub trait WritablePduPacket {
 pub trait CfdpPdu {
     fn pdu_header(&self) -> &PduHeader;
 
+    #[inline]
     fn source_id(&self) -> UnsignedByteField {
         self.pdu_header().common_pdu_conf().source_entity_id
     }
 
+    #[inline]
     fn dest_id(&self) -> UnsignedByteField {
         self.pdu_header().common_pdu_conf().dest_entity_id
     }
 
+    #[inline]
     fn transaction_seq_num(&self) -> UnsignedByteField {
         self.pdu_header().common_pdu_conf().transaction_seq_num
     }
 
+    #[inline]
     fn transmission_mode(&self) -> TransmissionMode {
         self.pdu_header().common_pdu_conf().trans_mode
     }
+
+    #[inline]
     fn direction(&self) -> Direction {
         self.pdu_header().common_pdu_conf().direction
     }
 
+    #[inline]
     fn crc_flag(&self) -> CrcFlag {
         self.pdu_header().common_pdu_conf().crc_flag
     }
 
+    #[inline]
     fn file_flag(&self) -> LargeFileFlag {
         self.pdu_header().common_pdu_conf().file_flag
     }
 
+    #[inline]
     fn pdu_type(&self) -> PduType {
         self.pdu_header().pdu_type()
     }
@@ -234,6 +245,7 @@ pub struct CommonPduConfig {
 
 // TODO: Builder pattern might be applicable here..
 impl CommonPduConfig {
+    #[inline]
     pub fn new(
         source_id: impl Into<UnsignedByteField>,
         dest_id: impl Into<UnsignedByteField>,
@@ -265,6 +277,7 @@ impl CommonPduConfig {
         })
     }
 
+    #[inline]
     pub fn new_with_byte_fields(
         source_id: impl Into<UnsignedByteField>,
         dest_id: impl Into<UnsignedByteField>,
@@ -281,10 +294,12 @@ impl CommonPduConfig {
         )
     }
 
+    #[inline]
     pub fn source_id(&self) -> UnsignedByteField {
         self.source_entity_id
     }
 
+    #[inline]
     fn source_dest_id_check(
         source_id: impl Into<UnsignedByteField>,
         dest_id: impl Into<UnsignedByteField>,
@@ -307,6 +322,7 @@ impl CommonPduConfig {
         Ok((source_id, dest_id))
     }
 
+    #[inline]
     pub fn set_source_and_dest_id(
         &mut self,
         source_id: impl Into<UnsignedByteField>,
@@ -318,6 +334,7 @@ impl CommonPduConfig {
         Ok(())
     }
 
+    #[inline]
     pub fn dest_id(&self) -> UnsignedByteField {
         self.dest_entity_id
     }
@@ -326,6 +343,7 @@ impl CommonPduConfig {
 impl Default for CommonPduConfig {
     /// The defaults for the source ID, destination ID and the transaction sequence number is the
     /// [UnsignedByteFieldU8] with an intitial value of 0
+    #[inline]
     fn default() -> Self {
         // The new function can not fail for these input parameters.
         Self::new(
@@ -342,6 +360,7 @@ impl Default for CommonPduConfig {
 }
 
 impl PartialEq for CommonPduConfig {
+    #[inline]
     fn eq(&self, other: &Self) -> bool {
         self.source_entity_id.value() == other.source_entity_id.value()
             && self.dest_entity_id.value() == other.dest_entity_id.value()
@@ -370,6 +389,7 @@ pub struct PduHeader {
 }
 
 impl PduHeader {
+    #[inline]
     pub fn new_for_file_data(
         pdu_conf: CommonPduConfig,
         pdu_datafield_len: u16,
@@ -385,6 +405,7 @@ impl PduHeader {
         )
     }
 
+    #[inline]
     pub fn new_for_file_data_default(pdu_conf: CommonPduConfig, pdu_datafield_len: u16) -> Self {
         Self::new_generic(
             PduType::FileData,
@@ -394,6 +415,7 @@ impl PduHeader {
             SegmentationControl::NoRecordBoundaryPreservation,
         )
     }
+    #[inline]
     pub fn new_no_file_data(pdu_conf: CommonPduConfig, pdu_datafield_len: u16) -> Self {
         Self::new_generic(
             PduType::FileDirective,
@@ -404,6 +426,7 @@ impl PduHeader {
         )
     }
 
+    #[inline]
     pub fn new_generic(
         pdu_type: PduType,
         pdu_conf: CommonPduConfig,
@@ -421,6 +444,7 @@ impl PduHeader {
     }
 
     /// Returns only the length of the PDU header when written to a raw buffer.
+    #[inline]
     pub fn header_len(&self) -> usize {
         FIXED_HEADER_LEN
             + self.pdu_conf.source_entity_id.size()
@@ -428,12 +452,14 @@ impl PduHeader {
             + self.pdu_conf.dest_entity_id.size()
     }
 
+    #[inline]
     pub fn pdu_datafield_len(&self) -> usize {
         self.pdu_datafield_len.into()
     }
 
     /// Returns the full length of the PDU when written to a raw buffer, which is the header length
     /// plus the PDU datafield length.
+    #[inline]
     pub fn pdu_len(&self) -> usize {
         self.header_len() + self.pdu_datafield_len as usize
     }
@@ -606,10 +632,13 @@ impl PduHeader {
             current_idx,
         ))
     }
+
+    #[inline]
     pub fn pdu_type(&self) -> PduType {
         self.pdu_type
     }
 
+    #[inline]
     pub fn common_pdu_conf(&self) -> &CommonPduConfig {
         &self.pdu_conf
     }
@@ -617,6 +646,8 @@ impl PduHeader {
     pub fn seg_metadata_flag(&self) -> SegmentMetadataFlag {
         self.seg_metadata_flag
     }
+
+    #[inline]
     pub fn seg_ctrl(&self) -> SegmentationControl {
         self.seg_ctrl
     }

src/ecss/mod.rs

@@ -1,8 +1,8 @@
 //! Common definitions and helpers required to create PUS TMTC packets according to
 //! [ECSS-E-ST-70-41C](https://ecss.nl/standard/ecss-e-st-70-41c-space-engineering-telemetry-and-telecommand-packet-utilization-15-april-2016/)
 //!
-//! You can find the PUS telecommand definitions in the [tc] module and ithe PUS telemetry definitions
+//! You can find the PUS telecommand types in the [tc] module and the the PUS telemetry
-//! inside the [tm] module.
+//! types inside the [tm] module.
 use crate::{ByteConversionError, CcsdsPacket, CRC_CCITT_FALSE};
 #[cfg(feature = "alloc")]
 use alloc::vec::Vec;
@@ -22,7 +22,6 @@ pub mod tm;
 pub mod verification;
 
 pub type CrcType = u16;
-pub const CCSDS_HEADER_LEN: usize = size_of::<crate::zc::SpHeader>();
 
 #[derive(Debug, Copy, Clone, Eq, PartialEq, IntoPrimitive, TryFromPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
@@ -246,7 +245,7 @@ pub(crate) fn verify_crc16_ccitt_false_from_raw_to_pus_error(
     crc16: u16,
 ) -> Result<(), PusError> {
     verify_crc16_ccitt_false_from_raw(raw_data)
-        .then(|| ())
+        .then_some(())
         .ok_or(PusError::ChecksumFailure(crc16))
 }
 
@@ -262,9 +261,13 @@ pub(crate) fn verify_crc16_ccitt_false_from_raw(raw_data: &[u8]) -> bool {
 macro_rules! ccsds_impl {
     () => {
         delegate!(to self.sp_header {
+            #[inline]
             fn ccsds_version(&self) -> u8;
+            #[inline]
             fn packet_id(&self) -> crate::PacketId;
+            #[inline]
             fn psc(&self) -> crate::PacketSequenceCtrl;
+            #[inline]
             fn data_len(&self) -> u16;
         });
     }
@@ -273,8 +276,11 @@ macro_rules! ccsds_impl {
 macro_rules! sp_header_impls {
     () => {
         delegate!(to self.sp_header {
+            #[inline]
             pub fn set_apid(&mut self, apid: u16) -> bool;
+            #[inline]
             pub fn set_seq_count(&mut self, seq_count: u16) -> bool;
+            #[inline]
             pub fn set_seq_flags(&mut self, seq_flag: SequenceFlags);
         });
     }

src/ecss/scheduling.rs

@@ -54,6 +54,7 @@ pub enum SchedStatus {
 }
 
 impl From<bool> for SchedStatus {
+    #[inline]
     fn from(value: bool) -> Self {
         if value {
             SchedStatus::Enabled

src/ecss/tc.rs

@@ -9,9 +9,11 @@
 //! use spacepackets::ecss::tc::{PusTcCreator, PusTcReader, PusTcSecondaryHeader};
 //!
 //! // Create a ping telecommand with no user application data
-//! let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
+//! let pus_tc = PusTcCreator::new_no_app_data(
-//! let tc_header = PusTcSecondaryHeader::new_simple(17, 1);
+//!     SpHeader::new_from_apid(0x02),
-//! let pus_tc = PusTcCreator::new_no_app_data(&mut sph, tc_header, true);
+//!     PusTcSecondaryHeader::new_simple(17, 1),
+//!     true
+//! );
 //! println!("{:?}", pus_tc);
 //! assert_eq!(pus_tc.service(), 17);
 //! assert_eq!(pus_tc.subservice(), 1);
@@ -111,22 +113,27 @@ pub mod zc {
     }
 
     impl GenericPusTcSecondaryHeader for PusTcSecondaryHeader {
+        #[inline]
         fn pus_version(&self) -> PusVersion {
             PusVersion::try_from(self.version_ack >> 4 & 0b1111).unwrap_or(PusVersion::Invalid)
         }
 
+        #[inline]
         fn ack_flags(&self) -> u8 {
             self.version_ack & 0b1111
         }
 
+        #[inline]
         fn service(&self) -> u8 {
             self.service
         }
 
+        #[inline]
         fn subservice(&self) -> u8 {
             self.subservice
         }
 
+        #[inline]
         fn source_id(&self) -> u16 {
             self.source_id.get()
         }
@@ -155,22 +162,27 @@ pub struct PusTcSecondaryHeader {
 }
 
 impl GenericPusTcSecondaryHeader for PusTcSecondaryHeader {
+    #[inline]
     fn pus_version(&self) -> PusVersion {
         self.version
     }
 
+    #[inline]
     fn ack_flags(&self) -> u8 {
         self.ack
     }
 
+    #[inline]
     fn service(&self) -> u8 {
         self.service
     }
 
+    #[inline]
     fn subservice(&self) -> u8 {
         self.subservice
     }
 
+    #[inline]
     fn source_id(&self) -> u16 {
         self.source_id
     }
@@ -191,6 +203,7 @@ impl TryFrom<zc::PusTcSecondaryHeader> for PusTcSecondaryHeader {
 }
 
 impl PusTcSecondaryHeader {
+    #[inline]
     pub fn new_simple(service: u8, subservice: u8) -> Self {
         PusTcSecondaryHeader {
             service,
@@ -201,6 +214,7 @@ impl PusTcSecondaryHeader {
         }
     }
 
+    #[inline]
     pub fn new(service: u8, subservice: u8, ack: u8, source_id: u16) -> Self {
         PusTcSecondaryHeader {
             service,
@@ -223,35 +237,36 @@ impl PusTcSecondaryHeader {
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
-pub struct PusTcCreator<'raw_data> {
+pub struct PusTcCreator<'app_data> {
     sp_header: SpHeader,
     pub sec_header: PusTcSecondaryHeader,
-    app_data: &'raw_data [u8],
+    app_data: &'app_data [u8],
 }
 
-impl<'raw_data> PusTcCreator<'raw_data> {
+impl<'app_data> PusTcCreator<'app_data> {
     /// Generates a new struct instance.
     ///
     /// # Arguments
     ///
-    /// * `sp_header` - Space packet header information. The correct packet type will be set
+    /// * `sp_header` - Space packet header information. The correct packet type and the secondary
-    ///     automatically
+    ///     header flag are set correctly by the constructor.
     /// * `sec_header` - Information contained in the data field header, including the service
     ///     and subservice type
     /// * `app_data` - Custom application data
     /// * `set_ccsds_len` - Can be used to automatically update the CCSDS space packet data length
     ///     field. If this is not set to true, [Self::update_ccsds_data_len] can be called to set
     ///     the correct value to this field manually
+    #[inline]
     pub fn new(
-        sp_header: &mut SpHeader,
+        mut sp_header: SpHeader,
         sec_header: PusTcSecondaryHeader,
-        app_data: &'raw_data [u8],
+        app_data: &'app_data [u8],
         set_ccsds_len: bool,
     ) -> Self {
         sp_header.set_packet_type(PacketType::Tc);
         sp_header.set_sec_header_flag();
         let mut pus_tc = Self {
-            sp_header: *sp_header,
+            sp_header,
             app_data,
             sec_header,
         };
@@ -263,11 +278,12 @@ impl<'raw_data> PusTcCreator<'raw_data> {
 
     /// Simplified version of the [Self::new] function which allows to only specify service
     /// and subservice instead of the full PUS TC secondary header.
+    #[inline]
     pub fn new_simple(
-        sph: &mut SpHeader,
+        sph: SpHeader,
         service: u8,
         subservice: u8,
-        app_data: &'raw_data [u8],
+        app_data: &'app_data [u8],
         set_ccsds_len: bool,
     ) -> Self {
         Self::new(
@@ -278,18 +294,26 @@ impl<'raw_data> PusTcCreator<'raw_data> {
         )
     }
 
+    #[inline]
     pub fn new_no_app_data(
-        sp_header: &mut SpHeader,
+        sp_header: SpHeader,
         sec_header: PusTcSecondaryHeader,
         set_ccsds_len: bool,
     ) -> Self {
         Self::new(sp_header, sec_header, &[], set_ccsds_len)
     }
 
+    #[inline]
     pub fn sp_header(&self) -> &SpHeader {
         &self.sp_header
     }
 
+    #[inline]
+    pub fn sp_header_mut(&mut self) -> &mut SpHeader {
+        &mut self.sp_header
+    }
+
+    #[inline]
     pub fn set_ack_field(&mut self, ack: u8) -> bool {
         if ack > 0b1111 {
             return false;
@@ -298,6 +322,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
         true
     }
 
+    #[inline]
     pub fn set_source_id(&mut self, source_id: u16) {
         self.sec_header.source_id = source_id;
     }
@@ -310,6 +335,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
     /// If this was not done or the application data is set or changed after construction,
     /// this function needs to be called to ensure that the data length field of the CCSDS header
     /// is set correctly.
+    #[inline]
     pub fn update_ccsds_data_len(&mut self) {
         self.sp_header.data_len =
             self.len_written() as u16 - size_of::<crate::zc::SpHeader>() as u16 - 1;
@@ -345,6 +371,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
 }
 
 impl WritablePusPacket for PusTcCreator<'_> {
+    #[inline]
     fn len_written(&self) -> usize {
         PUS_TC_MIN_LEN_WITHOUT_APP_DATA + self.app_data.len()
     }
@@ -385,15 +412,20 @@ impl CcsdsPacket for PusTcCreator<'_> {
 
 impl PusPacket for PusTcCreator<'_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
     });
 
+    #[inline]
     fn user_data(&self) -> &[u8] {
         self.app_data
     }
 
+    #[inline]
     fn crc16(&self) -> Option<u16> {
         Some(self.calc_own_crc16())
     }
@@ -401,10 +433,15 @@ impl PusPacket for PusTcCreator<'_> {
 
 impl GenericPusTcSecondaryHeader for PusTcCreator<'_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
+        #[inline]
         fn source_id(&self) -> u16;
+        #[inline]
         fn ack_flags(&self) -> u8;
     });
 }
@@ -482,24 +519,29 @@ impl<'raw_data> PusTcReader<'raw_data> {
         Ok((pus_tc, total_len))
     }
 
+    #[inline]
     pub fn app_data(&self) -> &[u8] {
         self.user_data()
     }
 
+    #[inline]
     pub fn raw_data(&self) -> &[u8] {
         self.raw_data
     }
 
+    #[inline]
     pub fn len_packed(&self) -> usize {
         self.sp_header.total_len()
     }
 
+    #[inline]
     pub fn sp_header(&self) -> &SpHeader {
         &self.sp_header
     }
 }
 
 impl PartialEq for PusTcReader<'_> {
+    #[inline]
     fn eq(&self, other: &Self) -> bool {
         self.raw_data == other.raw_data
     }
@@ -511,15 +553,20 @@ impl CcsdsPacket for PusTcReader<'_> {
 
 impl PusPacket for PusTcReader<'_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
     });
 
+    #[inline]
     fn user_data(&self) -> &[u8] {
         self.app_data
     }
 
+    #[inline]
     fn crc16(&self) -> Option<u16> {
         Some(self.crc16)
     }
@@ -527,10 +574,15 @@ impl PusPacket for PusTcReader<'_> {
 
 impl GenericPusTcSecondaryHeader for PusTcReader<'_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
+        #[inline]
         fn source_id(&self) -> u16;
+        #[inline]
         fn ack_flags(&self) -> u8;
     });
 }
@@ -568,19 +620,19 @@ mod tests {
     use postcard::{from_bytes, to_allocvec};
 
     fn base_ping_tc_full_ctor() -> PusTcCreator<'static> {
-        let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tc_checked(0x02, 0x34, 0).unwrap();
         let tc_header = PusTcSecondaryHeader::new_simple(17, 1);
-        PusTcCreator::new_no_app_data(&mut sph, tc_header, true)
+        PusTcCreator::new_no_app_data(sph, tc_header, true)
     }
 
     fn base_ping_tc_simple_ctor() -> PusTcCreator<'static> {
-        let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tc_checked(0x02, 0x34, 0).unwrap();
-        PusTcCreator::new_simple(&mut sph, 17, 1, &[], true)
+        PusTcCreator::new_simple(sph, 17, 1, &[], true)
     }
 
     fn base_ping_tc_simple_ctor_with_app_data(app_data: &'static [u8]) -> PusTcCreator<'static> {
-        let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tc_checked(0x02, 0x34, 0).unwrap();
-        PusTcCreator::new_simple(&mut sph, 17, 1, app_data, true)
+        PusTcCreator::new_simple(sph, 17, 1, app_data, true)
     }
 
     #[test]
@@ -636,8 +688,8 @@ mod tests {
 
     #[test]
     fn test_update_func() {
-        let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tc_checked(0x02, 0x34, 0).unwrap();
-        let mut tc = PusTcCreator::new_simple(&mut sph, 17, 1, &[], false);
+        let mut tc = PusTcCreator::new_simple(sph, 17, 1, &[], false);
         assert_eq!(tc.data_len(), 0);
         tc.update_ccsds_data_len();
         assert_eq!(tc.data_len(), 6);
@@ -809,7 +861,8 @@ mod tests {
         if !has_user_data {
             assert!(tc.user_data().is_empty());
         }
-        let mut comp_header = SpHeader::tc_unseg(0x02, 0x34, exp_full_len as u16 - 7).unwrap();
+        let mut comp_header =
+            SpHeader::new_for_unseg_tc_checked(0x02, 0x34, exp_full_len as u16 - 7).unwrap();
         comp_header.set_sec_header_flag();
         assert_eq!(*tc.sp_header(), comp_header);
     }
@@ -820,7 +873,8 @@ mod tests {
             assert!(tc.user_data().is_empty());
         }
         assert_eq!(tc.len_packed(), exp_full_len);
-        let mut comp_header = SpHeader::tc_unseg(0x02, 0x34, exp_full_len as u16 - 7).unwrap();
+        let mut comp_header =
+            SpHeader::new_for_unseg_tc_checked(0x02, 0x34, exp_full_len as u16 - 7).unwrap();
         comp_header.set_sec_header_flag();
         assert_eq!(*tc.sp_header(), comp_header);
     }

src/ecss/tm.rs

@@ -1,5 +1,47 @@
 //! This module contains all components required to create a ECSS PUS C telemetry packets according
 //! to [ECSS-E-ST-70-41C](https://ecss.nl/standard/ecss-e-st-70-41c-space-engineering-telemetry-and-telecommand-packet-utilization-15-april-2016/).
+//!
+//! # Examples
+//!
+//! ```rust
+//! use spacepackets::time::TimeWriter;
+//! use spacepackets::time::cds::CdsTime;
+//! use spacepackets::{CcsdsPacket, SpHeader};
+//! use spacepackets::ecss::{PusPacket, WritablePusPacket};
+//! use spacepackets::ecss::tm::{PusTmCreator, PusTmReader, PusTmSecondaryHeader};
+//!
+//! let mut time_buf: [u8; 7] = [0; 7];
+//! let time_now = CdsTime::now_with_u16_days().expect("creating CDS timestamp failed");
+//! // This can definitely hold the timestamp, so it is okay to unwrap.
+//! time_now.write_to_bytes(&mut time_buf).unwrap();
+//!
+//! // Create a ping telemetry with no user source data
+//! let ping_tm = PusTmCreator::new_no_source_data(
+//!     SpHeader::new_from_apid(0x02),
+//!     PusTmSecondaryHeader::new_simple(17, 2, &time_buf),
+//!     true
+//! );
+//! println!("{:?}", ping_tm);
+//! assert_eq!(ping_tm.service(), 17);
+//! assert_eq!(ping_tm.subservice(), 2);
+//! assert_eq!(ping_tm.apid(), 0x02);
+//!
+//! // Serialize TM into a raw buffer
+//! let mut test_buf: [u8; 32] = [0; 32];
+//! let written_size = ping_tm
+//!     .write_to_bytes(test_buf.as_mut_slice())
+//!     .expect("Error writing TC to buffer");
+//! assert_eq!(written_size, 22);
+//! println!("{:?}", &test_buf[0..written_size]);
+//!
+//! // Deserialize from the raw byte representation
+//! let (ping_tm_reader, read_size) = PusTmReader::new(&test_buf, 7).expect("Deserialization failed");
+//! assert_eq!(written_size, read_size);
+//! assert_eq!(ping_tm_reader.service(), 17);
+//! assert_eq!(ping_tm_reader.subservice(), 2);
+//! assert_eq!(ping_tm_reader.apid(), 0x02);
+//! assert_eq!(ping_tm_reader.timestamp(), &time_buf);
+//! ```
 use crate::ecss::{
     calc_pus_crc16, ccsds_impl, crc_from_raw_data, sp_header_impls, user_data_from_raw,
     verify_crc16_ccitt_false_from_raw_to_pus_error, CrcType, PusError, PusPacket, PusVersion,
@@ -86,27 +128,33 @@ pub mod zc {
     }
 
     impl GenericPusTmSecondaryHeader for PusTmSecHeaderWithoutTimestamp {
+        #[inline]
         fn pus_version(&self) -> PusVersion {
             PusVersion::try_from(self.pus_version_and_sc_time_ref_status >> 4 & 0b1111)
                 .unwrap_or(PusVersion::Invalid)
         }
 
+        #[inline]
         fn sc_time_ref_status(&self) -> u8 {
             self.pus_version_and_sc_time_ref_status & 0b1111
         }
 
+        #[inline]
         fn service(&self) -> u8 {
             self.service
         }
 
+        #[inline]
         fn subservice(&self) -> u8 {
             self.subservice
         }
 
+        #[inline]
         fn msg_counter(&self) -> u16 {
             self.msg_counter.get()
         }
 
+        #[inline]
         fn dest_id(&self) -> u16 {
             self.dest_id.get()
         }
@@ -123,25 +171,28 @@ pub struct PusTmSecondaryHeader<'stamp> {
     pub subservice: u8,
     pub msg_counter: u16,
     pub dest_id: u16,
-    pub time_stamp: &'stamp [u8],
+    pub timestamp: &'stamp [u8],
 }
 
 impl<'stamp> PusTmSecondaryHeader<'stamp> {
-    pub fn new_simple(service: u8, subservice: u8, time_stamp: &'stamp [u8]) -> Self {
+    #[inline]
-        Self::new(service, subservice, 0, 0, time_stamp)
+    pub fn new_simple(service: u8, subservice: u8, timestamp: &'stamp [u8]) -> Self {
+        Self::new(service, subservice, 0, 0, timestamp)
     }
 
     /// Like [Self::new_simple] but without a timestamp.
+    #[inline]
     pub fn new_simple_no_timestamp(service: u8, subservice: u8) -> Self {
         Self::new(service, subservice, 0, 0, &[])
     }
 
+    #[inline]
     pub fn new(
         service: u8,
         subservice: u8,
         msg_counter: u16,
         dest_id: u16,
-        time_stamp: &'stamp [u8],
+        timestamp: &'stamp [u8],
     ) -> Self {
         PusTmSecondaryHeader {
             pus_version: PusVersion::PusC,
@@ -150,32 +201,38 @@ impl<'stamp> PusTmSecondaryHeader<'stamp> {
             subservice,
             msg_counter,
             dest_id,
-            time_stamp,
+            timestamp,
         }
     }
 }
 
 impl GenericPusTmSecondaryHeader for PusTmSecondaryHeader<'_> {
+    #[inline]
     fn pus_version(&self) -> PusVersion {
         self.pus_version
     }
 
+    #[inline]
     fn sc_time_ref_status(&self) -> u8 {
         self.sc_time_ref_status
     }
 
+    #[inline]
     fn service(&self) -> u8 {
         self.service
     }
 
+    #[inline]
     fn subservice(&self) -> u8 {
         self.subservice
     }
 
+    #[inline]
     fn msg_counter(&self) -> u16 {
         self.msg_counter
     }
 
+    #[inline]
     fn dest_id(&self) -> u16 {
         self.dest_id
     }
@@ -184,6 +241,7 @@ impl GenericPusTmSecondaryHeader for PusTmSecondaryHeader<'_> {
 impl<'slice> TryFrom<zc::PusTmSecHeader<'slice>> for PusTmSecondaryHeader<'slice> {
     type Error = ();
 
+    #[inline]
     fn try_from(sec_header: zc::PusTmSecHeader<'slice>) -> Result<Self, Self::Error> {
         Ok(PusTmSecondaryHeader {
             pus_version: sec_header.zc_header.pus_version(),
@@ -192,7 +250,7 @@ impl<'slice> TryFrom<zc::PusTmSecHeader<'slice>> for PusTmSecondaryHeader<'slice
             subservice: sec_header.zc_header.subservice(),
             msg_counter: sec_header.zc_header.msg_counter(),
             dest_id: sec_header.zc_header.dest_id(),
-            time_stamp: sec_header.timestamp,
+            timestamp: sec_header.timestamp,
         })
     }
 }
@@ -208,43 +266,45 @@ impl<'slice> TryFrom<zc::PusTmSecHeader<'slice>> for PusTmSecondaryHeader<'slice
 ///
 /// # Lifetimes
 ///
-/// * `'raw_data` - This is the lifetime of the user provided time stamp and source data.
+/// * `'time` - This is the lifetime of the user provided timestamp.
+/// * `'src_data` - This is the lifetime of the user provided source data.
 #[derive(Eq, Debug, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
-pub struct PusTmCreator<'time, 'raw_data> {
+pub struct PusTmCreator<'time, 'src_data> {
     pub sp_header: SpHeader,
     #[cfg_attr(feature = "serde", serde(borrow))]
     pub sec_header: PusTmSecondaryHeader<'time>,
-    source_data: &'raw_data [u8],
+    source_data: &'src_data [u8],
     /// If this is set to false, a manual call to [Self::calc_own_crc16] or
     /// [Self::update_packet_fields] is necessary for the serialized or cached CRC16 to be valid.
     pub calc_crc_on_serialization: bool,
 }
 
-impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
+impl<'time, 'src_data> PusTmCreator<'time, 'src_data> {
     /// Generates a new struct instance.
     ///
     /// # Arguments
     ///
-    /// * `sp_header` - Space packet header information. The correct packet type will be set
+    /// * `sp_header` - Space packet header information. The correct packet type and the secondary
-    ///     automatically
+    ///     header flag are set correctly by the constructor.
     /// * `sec_header` - Information contained in the secondary header, including the service
     ///     and subservice type
     /// * `source_data` - Custom application data
     /// * `set_ccsds_len` - Can be used to automatically update the CCSDS space packet data length
     ///     field. If this is not set to true, [Self::update_ccsds_data_len] can be called to set
     ///     the correct value to this field manually
+    #[inline]
     pub fn new(
-        sp_header: &mut SpHeader,
+        mut sp_header: SpHeader,
         sec_header: PusTmSecondaryHeader<'time>,
-        source_data: &'raw_data [u8],
+        source_data: &'src_data [u8],
         set_ccsds_len: bool,
     ) -> Self {
         sp_header.set_packet_type(PacketType::Tm);
         sp_header.set_sec_header_flag();
         let mut pus_tm = Self {
-            sp_header: *sp_header,
+            sp_header,
             source_data,
             sec_header,
             calc_crc_on_serialization: true,
@@ -255,50 +315,52 @@ impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
         pus_tm
     }
 
+    #[inline]
     pub fn new_simple(
-        sp_header: &mut SpHeader,
+        sp_header: SpHeader,
         service: u8,
         subservice: u8,
         time_provider: &impl TimeWriter,
         stamp_buf: &'time mut [u8],
-        source_data: Option<&'raw_data [u8]>,
+        source_data: &'src_data [u8],
         set_ccsds_len: bool,
     ) -> Result<Self, TimestampError> {
         let stamp_size = time_provider.write_to_bytes(stamp_buf)?;
         let sec_header =
             PusTmSecondaryHeader::new_simple(service, subservice, &stamp_buf[0..stamp_size]);
-        Ok(Self::new(
+        Ok(Self::new(sp_header, sec_header, source_data, set_ccsds_len))
-            sp_header,
-            sec_header,
-            source_data.unwrap_or(&[]),
-            set_ccsds_len,
-        ))
     }
 
+    #[inline]
     pub fn new_no_source_data(
-        sp_header: &mut SpHeader,
+        sp_header: SpHeader,
         sec_header: PusTmSecondaryHeader<'time>,
         set_ccsds_len: bool,
     ) -> Self {
         Self::new(sp_header, sec_header, &[], set_ccsds_len)
     }
 
+    #[inline]
     pub fn timestamp(&self) -> &[u8] {
-        self.sec_header.time_stamp
+        self.sec_header.timestamp
     }
 
+    #[inline]
     pub fn source_data(&self) -> &[u8] {
         self.source_data
     }
 
+    #[inline]
     pub fn set_dest_id(&mut self, dest_id: u16) {
         self.sec_header.dest_id = dest_id;
     }
 
+    #[inline]
     pub fn set_msg_counter(&mut self, msg_counter: u16) {
         self.sec_header.msg_counter = msg_counter
     }
 
+    #[inline]
     pub fn set_sc_time_ref_status(&mut self, sc_time_ref_status: u8) {
         self.sec_header.sc_time_ref_status = sc_time_ref_status & 0b1111;
     }
@@ -310,6 +372,7 @@ impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
     /// If this was not done or the time stamp or source data is set or changed after construction,
     /// this function needs to be called to ensure that the data length field of the CCSDS header
     /// is set correctly
+    #[inline]
     pub fn update_ccsds_data_len(&mut self) {
         self.sp_header.data_len =
             self.len_written() as u16 - size_of::<crate::zc::SpHeader>() as u16 - 1;
@@ -323,12 +386,13 @@ impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
         digest.update(sph_zc.as_bytes());
         let pus_tc_header = zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
         digest.update(pus_tc_header.as_bytes());
-        digest.update(self.sec_header.time_stamp);
+        digest.update(self.sec_header.timestamp);
         digest.update(self.source_data);
         digest.finalize()
     }
 
     /// This helper function calls both [Self::update_ccsds_data_len] and [Self::calc_own_crc16]
+    #[inline]
     pub fn update_packet_fields(&mut self) {
         self.update_ccsds_data_len();
     }
@@ -352,9 +416,9 @@ impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
             .write_to_bytes(&mut slice[curr_idx..curr_idx + sec_header_len])
             .ok_or(ByteConversionError::ZeroCopyToError)?;
         curr_idx += sec_header_len;
-        slice[curr_idx..curr_idx + self.sec_header.time_stamp.len()]
+        slice[curr_idx..curr_idx + self.sec_header.timestamp.len()]
-            .copy_from_slice(self.sec_header.time_stamp);
+            .copy_from_slice(self.sec_header.timestamp);
-        curr_idx += self.sec_header.time_stamp.len();
+        curr_idx += self.sec_header.timestamp.len();
         slice[curr_idx..curr_idx + self.source_data.len()].copy_from_slice(self.source_data);
         curr_idx += self.source_data.len();
         let mut digest = CRC_CCITT_FALSE.digest();
@@ -368,15 +432,14 @@ impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
     #[cfg(feature = "alloc")]
     pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> Result<usize, PusError> {
         let sph_zc = crate::zc::SpHeader::from(self.sp_header);
-        let mut appended_len =
+        let mut appended_len = PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA + self.sec_header.timestamp.len();
-            PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA + self.sec_header.time_stamp.len();
         appended_len += self.source_data.len();
         let start_idx = vec.len();
         vec.extend_from_slice(sph_zc.as_bytes());
         // The PUS version is hardcoded to PUS C
         let sec_header = zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
         vec.extend_from_slice(sec_header.as_bytes());
-        vec.extend_from_slice(self.sec_header.time_stamp);
+        vec.extend_from_slice(self.sec_header.timestamp);
         vec.extend_from_slice(self.source_data);
         let mut digest = CRC_CCITT_FALSE.digest();
         digest.update(&vec[start_idx..start_idx + appended_len - 2]);
@@ -386,9 +449,10 @@ impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
 }
 
 impl WritablePusPacket for PusTmCreator<'_, '_> {
+    #[inline]
     fn len_written(&self) -> usize {
         PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA
-            + self.sec_header.time_stamp.len()
+            + self.sec_header.timestamp.len()
             + self.source_data.len()
     }
     /// Write the raw PUS byte representation to a provided buffer.
@@ -411,15 +475,20 @@ impl CcsdsPacket for PusTmCreator<'_, '_> {
 
 impl PusPacket for PusTmCreator<'_, '_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
     });
 
+    #[inline]
     fn user_data(&self) -> &[u8] {
         self.source_data
     }
 
+    #[inline]
     fn crc16(&self) -> Option<u16> {
         Some(self.calc_own_crc16())
     }
@@ -427,11 +496,17 @@ impl PusPacket for PusTmCreator<'_, '_> {
 
 impl GenericPusTmSecondaryHeader for PusTmCreator<'_, '_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
+        #[inline]
         fn dest_id(&self) -> u16;
+        #[inline]
         fn msg_counter(&self) -> u16;
+        #[inline]
         fn sc_time_ref_status(&self) -> u8;
     });
 }
@@ -518,19 +593,23 @@ impl<'raw_data> PusTmReader<'raw_data> {
         Ok((pus_tm, total_len))
     }
 
+    #[inline]
     pub fn len_packed(&self) -> usize {
         self.sp_header.total_len()
     }
 
+    #[inline]
     pub fn source_data(&self) -> &[u8] {
         self.user_data()
     }
 
+    #[inline]
     pub fn timestamp(&self) -> &[u8] {
-        self.sec_header.time_stamp
+        self.sec_header.timestamp
     }
 
     /// This function will return the slice [Self] was constructed from.
+    #[inline]
     pub fn raw_data(&self) -> &[u8] {
         self.raw_data
     }
@@ -551,15 +630,20 @@ impl CcsdsPacket for PusTmReader<'_> {
 
 impl PusPacket for PusTmReader<'_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
     });
 
+    #[inline]
     fn user_data(&self) -> &[u8] {
         self.source_data
     }
 
+    #[inline]
     fn crc16(&self) -> Option<u16> {
         Some(self.crc16)
     }
@@ -567,11 +651,17 @@ impl PusPacket for PusTmReader<'_> {
 
 impl GenericPusTmSecondaryHeader for PusTmReader<'_> {
     delegate!(to self.sec_header {
+        #[inline]
         fn pus_version(&self) -> PusVersion;
+        #[inline]
         fn service(&self) -> u8;
+        #[inline]
         fn subservice(&self) -> u8;
+        #[inline]
         fn dest_id(&self) -> u16;
+        #[inline]
         fn msg_counter(&self) -> u16;
+        #[inline]
         fn sc_time_ref_status(&self) -> u8;
     });
 }
@@ -633,6 +723,7 @@ impl<'raw> PusTmZeroCopyWriter<'raw> {
 
     /// Set the sequence count. Returns false and does not update the value if the passed value
     /// exceeds [MAX_APID].
+    #[inline]
     pub fn set_apid(&mut self, apid: u16) -> bool {
         if apid > MAX_APID {
             return false;
@@ -645,11 +736,13 @@ impl<'raw> PusTmZeroCopyWriter<'raw> {
     }
 
     /// This function sets the message counter in the PUS TM secondary header.
+    #[inline]
     pub fn set_msg_count(&mut self, msg_count: u16) {
         self.raw_tm[9..11].copy_from_slice(&msg_count.to_be_bytes());
     }
 
     /// This function sets the destination ID in the PUS TM secondary header.
+    #[inline]
     pub fn set_destination_id(&mut self, dest_id: u16) {
         self.raw_tm[11..13].copy_from_slice(&dest_id.to_be_bytes())
     }
@@ -674,6 +767,7 @@ impl<'raw> PusTmZeroCopyWriter<'raw> {
 
     /// Set the sequence count. Returns false and does not update the value if the passed value
     /// exceeds [MAX_SEQ_COUNT].
+    #[inline]
     pub fn set_seq_count(&mut self, seq_count: u16) -> bool {
         if seq_count > MAX_SEQ_COUNT {
             return false;
@@ -788,20 +882,20 @@ mod tests {
     const DUMMY_DATA: &[u8] = &[0, 1, 2];
 
     fn base_ping_reply_full_ctor(timestamp: &[u8]) -> PusTmCreator {
-        let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tm_checked(0x123, 0x234, 0).unwrap();
         let tm_header = PusTmSecondaryHeader::new_simple(17, 2, timestamp);
-        PusTmCreator::new_no_source_data(&mut sph, tm_header, true)
+        PusTmCreator::new_no_source_data(sph, tm_header, true)
     }
     fn ping_reply_with_data(timestamp: &[u8]) -> PusTmCreator {
-        let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tm_checked(0x123, 0x234, 0).unwrap();
         let tm_header = PusTmSecondaryHeader::new_simple(17, 2, timestamp);
-        PusTmCreator::new(&mut sph, tm_header, DUMMY_DATA, true)
+        PusTmCreator::new(sph, tm_header, DUMMY_DATA, true)
     }
 
     fn base_hk_reply<'a, 'b>(timestamp: &'a [u8], src_data: &'b [u8]) -> PusTmCreator<'a, 'b> {
-        let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tm_checked(0x123, 0x234, 0).unwrap();
         let tc_header = PusTmSecondaryHeader::new_simple(3, 5, timestamp);
-        PusTmCreator::new(&mut sph, tc_header, src_data, true)
+        PusTmCreator::new(sph, tc_header, src_data, true)
     }
 
     fn dummy_timestamp() -> &'static [u8] {
@@ -816,11 +910,11 @@ mod tests {
     }
     #[test]
     fn test_basic_simple_api() {
-        let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tm_checked(0x123, 0x234, 0).unwrap();
         let time_provider = CdsTime::new_with_u16_days(0, 0);
         let mut stamp_buf: [u8; 8] = [0; 8];
         let pus_tm =
-            PusTmCreator::new_simple(&mut sph, 17, 2, &time_provider, &mut stamp_buf, None, true)
+            PusTmCreator::new_simple(sph, 17, 2, &time_provider, &mut stamp_buf, &[], true)
                 .unwrap();
         verify_ping_reply(&pus_tm, false, 22, &[64, 0, 0, 0, 0, 0, 0]);
     }
@@ -917,9 +1011,9 @@ mod tests {
 
     #[test]
     fn test_manual_field_update() {
-        let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tm_checked(0x123, 0x234, 0).unwrap();
         let tc_header = PusTmSecondaryHeader::new_simple(17, 2, dummy_timestamp());
-        let mut tm = PusTmCreator::new_no_source_data(&mut sph, tc_header, false);
+        let mut tm = PusTmCreator::new_no_source_data(sph, tc_header, false);
         tm.calc_crc_on_serialization = false;
         assert_eq!(tm.data_len(), 0x00);
         let mut buf: [u8; 32] = [0; 32];
@@ -1147,7 +1241,7 @@ mod tests {
     #[test]
     fn test_sec_header_without_stamp() {
         let sec_header = PusTmSecondaryHeader::new_simple_no_timestamp(17, 1);
-        assert_eq!(sec_header.time_stamp, &[]);
+        assert_eq!(sec_header.timestamp, &[]);
     }
 
     #[test]
@@ -1207,11 +1301,11 @@ mod tests {
     #[test]
     #[cfg(feature = "serde")]
     fn test_serialization_creator_serde() {
-        let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tm_checked(0x123, 0x234, 0).unwrap();
         let time_provider = CdsTime::new_with_u16_days(0, 0);
         let mut stamp_buf: [u8; 8] = [0; 8];
         let pus_tm =
-            PusTmCreator::new_simple(&mut sph, 17, 2, &time_provider, &mut stamp_buf, None, true)
+            PusTmCreator::new_simple(sph, 17, 2, &time_provider, &mut stamp_buf, &[], true)
                 .unwrap();
 
         let output = to_allocvec(&pus_tm).unwrap();
@@ -1222,11 +1316,11 @@ mod tests {
     #[test]
     #[cfg(feature = "serde")]
     fn test_serialization_reader_serde() {
-        let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
+        let sph = SpHeader::new_for_unseg_tm_checked(0x123, 0x234, 0).unwrap();
         let time_provider = CdsTime::new_with_u16_days(0, 0);
         let mut stamp_buf: [u8; 8] = [0; 8];
         let pus_tm =
-            PusTmCreator::new_simple(&mut sph, 17, 2, &time_provider, &mut stamp_buf, None, true)
+            PusTmCreator::new_simple(sph, 17, 2, &time_provider, &mut stamp_buf, &[], true)
                 .unwrap();
         let pus_tm_vec = pus_tm.to_vec().unwrap();
         let (tm_reader, _) = PusTmReader::new(&pus_tm_vec, time_provider.len_as_bytes()).unwrap();

src/lib.rs

@@ -22,10 +22,6 @@
 //!
 //! `spacepackets` supports various runtime environments and is also suitable for `no_std` environments.
 //!
-//! It also offers optional support for [`serde`](https://serde.rs/). This allows serializing and
-//! deserializing them with an appropriate `serde` provider like
-//! [`postcard`](https://github.com/jamesmunns/postcard).
-//!
 //! ### Default features
 //!
 //!  - [`std`](https://doc.rust-lang.org/std/): Enables functionality relying on the standard library.
@@ -52,7 +48,7 @@
 //!
 //! ```rust
 //! use spacepackets::SpHeader;
-//! let sp_header = SpHeader::tc_unseg(0x42, 12, 1).expect("Error creating CCSDS TC header");
+//! let sp_header = SpHeader::new_for_unseg_tc_checked(0x42, 12, 1).expect("error creating CCSDS TC header");
 //! println!("{:?}", sp_header);
 //! let mut ccsds_buf: [u8; 32] = [0; 32];
 //! sp_header.write_to_be_bytes(&mut ccsds_buf).expect("Writing CCSDS TC header failed");
@@ -65,7 +61,6 @@ extern crate alloc;
 #[cfg(any(feature = "std", test))]
 extern crate std;
 
-use crate::ecss::CCSDS_HEADER_LEN;
 use core::{
     fmt::{Debug, Display, Formatter},
     hash::Hash,
@@ -88,6 +83,8 @@ mod private {
     pub trait Sealed {}
 }
 
+pub const CCSDS_HEADER_LEN: usize = core::mem::size_of::<crate::zc::SpHeader>();
+
 /// CRC algorithm used by the PUS standard, the CCSDS TC standard and the CFDP standard.
 pub const CRC_CCITT_FALSE: Crc<u16> = Crc::<u16>::new(&CRC_16_IBM_3740);
 
@@ -207,18 +204,21 @@ pub struct PacketId {
 }
 
 impl PartialEq for PacketId {
+    #[inline]
     fn eq(&self, other: &Self) -> bool {
         self.raw().eq(&other.raw())
     }
 }
 
 impl PartialOrd for PacketId {
+    #[inline]
     fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
         Some(self.cmp(other))
     }
 }
 
 impl Ord for PacketId {
+    #[inline]
     fn cmp(&self, other: &Self) -> core::cmp::Ordering {
         self.raw().cmp(&other.raw())
     }
@@ -232,6 +232,7 @@ impl Hash for PacketId {
 }
 
 impl Default for PacketId {
+    #[inline]
     fn default() -> Self {
         PacketId {
             ptype: PacketType::Tm,
@@ -242,23 +243,34 @@ impl Default for PacketId {
 }
 
 impl PacketId {
-    pub const fn const_tc(sec_header: bool, apid: u16) -> Self {
+    /// This constructor will panic if the passed APID exceeds [MAX_APID].
-        Self::const_new(PacketType::Tc, sec_header, apid)
+    /// Use the checked constructor variants to avoid panics.
-    }
+    #[inline]
-
+    pub const fn new_for_tc(sec_header: bool, apid: u16) -> Self {
-    pub const fn const_tm(sec_header: bool, apid: u16) -> Self {
-        Self::const_new(PacketType::Tm, sec_header, apid)
-    }
-
-    pub fn tc(sec_header: bool, apid: u16) -> Option<Self> {
         Self::new(PacketType::Tc, sec_header, apid)
     }
 
-    pub fn tm(sec_header: bool, apid: u16) -> Option<Self> {
+    /// This constructor will panic if the passed APID exceeds [MAX_APID].
+    /// Use the checked constructor variants to avoid panics.
+    #[inline]
+    pub const fn new_for_tm(sec_header: bool, apid: u16) -> Self {
         Self::new(PacketType::Tm, sec_header, apid)
     }
 
-    pub const fn const_new(ptype: PacketType, sec_header: bool, apid: u16) -> Self {
+    #[inline]
+    pub fn new_for_tc_checked(sec_header: bool, apid: u16) -> Option<Self> {
+        Self::new_checked(PacketType::Tc, sec_header, apid)
+    }
+
+    #[inline]
+    pub fn new_for_tm_checked(sec_header: bool, apid: u16) -> Option<Self> {
+        Self::new_checked(PacketType::Tm, sec_header, apid)
+    }
+
+    /// This constructor will panic if the passed APID exceeds [MAX_APID].
+    /// Use the checked variants to avoid panics.
+    #[inline]
+    pub const fn new(ptype: PacketType, sec_header: bool, apid: u16) -> Self {
         if apid > MAX_APID {
             panic!("APID too large");
         }
@@ -269,16 +281,18 @@ impl PacketId {
         }
     }
 
-    pub fn new(ptype: PacketType, sec_header_flag: bool, apid: u16) -> Option<PacketId> {
+    #[inline]
+    pub fn new_checked(ptype: PacketType, sec_header_flag: bool, apid: u16) -> Option<PacketId> {
         if apid > MAX_APID {
             return None;
         }
-        Some(PacketId::const_new(ptype, sec_header_flag, apid))
+        Some(PacketId::new(ptype, sec_header_flag, apid))
     }
 
     /// Set a new Application Process ID (APID). If the passed number is invalid, the APID will
     /// not be set and false will be returned. The maximum allowed value for the 11-bit field is
     /// 2047
+    #[inline]
     pub fn set_apid(&mut self, apid: u16) -> bool {
         if apid > MAX_APID {
             return false;
@@ -287,6 +301,7 @@ impl PacketId {
         true
     }
 
+    #[inline]
     pub fn apid(&self) -> u16 {
         self.apid
     }
@@ -318,9 +333,10 @@ pub struct PacketSequenceCtrl {
 }
 
 impl PacketSequenceCtrl {
-    /// const variant of [PacketSequenceCtrl::new], but panics if the sequence count exceeds
+    /// This constructor panics if the sequence count exceeds [MAX_SEQ_COUNT].
-    /// [MAX_SEQ_COUNT].
+    /// Use [Self::new_checked] to avoid panics.
-    pub const fn const_new(seq_flags: SequenceFlags, seq_count: u16) -> PacketSequenceCtrl {
+    #[inline]
+    pub const fn new(seq_flags: SequenceFlags, seq_count: u16) -> PacketSequenceCtrl {
         if seq_count > MAX_SEQ_COUNT {
             panic!("Sequence count too large");
         }
@@ -331,18 +347,22 @@ impl PacketSequenceCtrl {
     }
 
     /// Returns [None] if the passed sequence count exceeds [MAX_SEQ_COUNT].
-    pub fn new(seq_flags: SequenceFlags, seq_count: u16) -> Option<PacketSequenceCtrl> {
+    #[inline]
+    pub fn new_checked(seq_flags: SequenceFlags, seq_count: u16) -> Option<PacketSequenceCtrl> {
         if seq_count > MAX_SEQ_COUNT {
             return None;
         }
-        Some(PacketSequenceCtrl::const_new(seq_flags, seq_count))
+        Some(PacketSequenceCtrl::new(seq_flags, seq_count))
     }
+
+    #[inline]
     pub fn raw(&self) -> u16 {
         ((self.seq_flags as u16) << 14) | self.seq_count
     }
 
     /// Set a new sequence count. If the passed number is invalid, the sequence count will not be
     /// set and false will be returned. The maximum allowed value for the 14-bit field is 16383.
+    #[inline]
     pub fn set_seq_count(&mut self, ssc: u16) -> bool {
         if ssc > MAX_SEQ_COUNT {
             return false;
@@ -351,6 +371,7 @@ impl PacketSequenceCtrl {
         true
     }
 
+    #[inline]
     pub fn seq_count(&self) -> u16 {
         self.seq_count
     }
@@ -392,6 +413,7 @@ pub trait CcsdsPacket {
     /// Retrieve data length field
     fn data_len(&self) -> u16;
     /// Retrieve the total packet size based on the data length field
+    #[inline]
     fn total_len(&self) -> usize {
         usize::from(self.data_len()) + CCSDS_HEADER_LEN + 1
     }
@@ -480,9 +502,12 @@ pub struct SpHeader {
     pub data_len: u16,
 }
 
+pub type SpacePacketHeader = SpHeader;
+
 impl Default for SpHeader {
-    /// The default function sets the sequence flag field to [SequenceFlags::Unsegmented]. The data
+    /// The default function sets the sequence flag field to [SequenceFlags::Unsegmented] and the
-    /// length field is set to 1, which denotes an empty space packets.
+    /// data length to 0.
+    #[inline]
     fn default() -> Self {
         SpHeader {
             version: 0,
@@ -491,12 +516,13 @@ impl Default for SpHeader {
                 seq_flags: SequenceFlags::Unsegmented,
                 seq_count: 0,
             },
-            data_len: 1,
+            data_len: 0,
         }
     }
 }
 
 impl SpHeader {
+    #[inline]
     pub const fn new(packet_id: PacketId, psc: PacketSequenceCtrl, data_len: u16) -> Self {
         Self {
             version: 0,
@@ -506,9 +532,43 @@ impl SpHeader {
         }
     }
 
-    /// const variant of the [SpHeader::new_fron_single_fields] function. Panics if the passed
+    /// This constructor sets the sequence flag field to [SequenceFlags::Unsegmented] and the data
-    /// APID exceeds [MAX_APID] or the passed packet sequence count exceeds [MAX_SEQ_COUNT].
+    /// length to 0.
-    const fn const_new_from_single_fields(
+    ///
+    /// This constructor will panic if the APID exceeds [MAX_APID].
+    #[inline]
+    pub const fn new_from_apid(apid: u16) -> Self {
+        SpHeader {
+            version: 0,
+            packet_id: PacketId::new(PacketType::Tm, false, apid),
+            psc: PacketSequenceCtrl {
+                seq_flags: SequenceFlags::Unsegmented,
+                seq_count: 0,
+            },
+            data_len: 0,
+        }
+    }
+
+    /// Checked variant of [Self::new_from_apid].
+    #[inline]
+    pub fn new_from_apid_checked(apid: u16) -> Option<Self> {
+        Some(SpHeader {
+            version: 0,
+            packet_id: PacketId::new_checked(PacketType::Tm, false, apid)?,
+            psc: PacketSequenceCtrl {
+                seq_flags: SequenceFlags::Unsegmented,
+                seq_count: 0,
+            },
+            data_len: 0,
+        })
+    }
+
+    /// This constructor panics if the passed APID exceeds [MAX_APID] or the passed packet sequence
+    /// count exceeds [MAX_SEQ_COUNT].
+    ///
+    /// The checked constructor variants can be used to avoid panics.
+    #[inline]
+    pub const fn new_from_fields(
         ptype: PacketType,
         sec_header: bool,
         apid: u16,
@@ -523,17 +583,20 @@ impl SpHeader {
             panic!("APID is too large");
         }
         Self {
-            psc: PacketSequenceCtrl::const_new(seq_flags, seq_count),
+            psc: PacketSequenceCtrl::new(seq_flags, seq_count),
-            packet_id: PacketId::const_new(ptype, sec_header, apid),
+            packet_id: PacketId::new(ptype, sec_header, apid),
             data_len,
             version: 0,
         }
     }
 
     /// Create a new Space Packet Header instance which can be used to create generic
-    /// Space Packets. This will return [None] if the APID or sequence count argument
+    /// Space Packets.
+    ///
+    /// This will return [None] if the APID or sequence count argument
     /// exceed [MAX_APID] or [MAX_SEQ_COUNT] respectively. The version field is set to 0b000.
-    pub fn new_from_single_fields(
+    #[inline]
+    pub fn new_from_fields_checked(
         ptype: PacketType,
         sec_header: bool,
         apid: u16,
@@ -544,56 +607,117 @@ impl SpHeader {
         if seq_count > MAX_SEQ_COUNT || apid > MAX_APID {
             return None;
         }
-        Some(SpHeader::const_new_from_single_fields(
+        Some(SpHeader::new_from_fields(
             ptype, sec_header, apid, seq_flags, seq_count, data_len,
         ))
     }
 
     /// Helper function for telemetry space packet headers. The packet type field will be
     /// set accordingly. The secondary header flag field is set to false.
-    pub fn tm(apid: u16, seq_flags: SequenceFlags, seq_count: u16, data_len: u16) -> Option<Self> {
+    #[inline]
-        Self::new_from_single_fields(PacketType::Tm, false, apid, seq_flags, seq_count, data_len)
+    pub fn new_for_tm_checked(
+        apid: u16,
+        seq_flags: SequenceFlags,
+        seq_count: u16,
+        data_len: u16,
+    ) -> Option<Self> {
+        Self::new_from_fields_checked(PacketType::Tm, false, apid, seq_flags, seq_count, data_len)
     }
 
     /// Helper function for telemetry space packet headers. The packet type field will be
     /// set accordingly. The secondary header flag field is set to false.
-    pub fn tc(apid: u16, seq_flags: SequenceFlags, seq_count: u16, data_len: u16) -> Option<Self> {
+    #[inline]
-        Self::new_from_single_fields(PacketType::Tc, false, apid, seq_flags, seq_count, data_len)
+    pub fn new_for_tc_checked(
+        apid: u16,
+        seq_flags: SequenceFlags,
+        seq_count: u16,
+        data_len: u16,
+    ) -> Option<Self> {
+        Self::new_from_fields_checked(PacketType::Tc, false, apid, seq_flags, seq_count, data_len)
     }
 
-    /// Variant of [SpHeader::tm] which sets the sequence flag field to [SequenceFlags::Unsegmented]
+    /// This is an unchecked constructor which can panic on invalid input.
-    pub fn tm_unseg(apid: u16, seq_count: u16, data_len: u16) -> Option<Self> {
+    #[inline]
-        Self::tm(apid, SequenceFlags::Unsegmented, seq_count, data_len)
+    pub const fn new_for_tm(
+        apid: u16,
+        seq_flags: SequenceFlags,
+        seq_count: u16,
+        data_len: u16,
+    ) -> Self {
+        Self::new_from_fields(PacketType::Tm, false, apid, seq_flags, seq_count, data_len)
     }
 
-    /// Variant of [SpHeader::tc] which sets the sequence flag field to [SequenceFlags::Unsegmented]
+    /// This is an unchecked constructor which can panic on invalid input.
-    pub fn tc_unseg(apid: u16, seq_count: u16, data_len: u16) -> Option<Self> {
+    #[inline]
-        Self::tc(apid, SequenceFlags::Unsegmented, seq_count, data_len)
+    pub const fn new_for_tc(
+        apid: u16,
+        seq_flags: SequenceFlags,
+        seq_count: u16,
+        data_len: u16,
+    ) -> Self {
+        Self::new_from_fields(PacketType::Tc, false, apid, seq_flags, seq_count, data_len)
     }
 
-    //noinspection RsTraitImplementation
+    /// Variant of [SpHeader::new_for_tm_checked] which sets the sequence flag field to [SequenceFlags::Unsegmented]
-    delegate!(to self.packet_id {
+    #[inline]
-        /// Returns [false] and fails if the APID exceeds [MAX_APID]
+    pub fn new_for_unseg_tm_checked(apid: u16, seq_count: u16, data_len: u16) -> Option<Self> {
-        pub fn set_apid(&mut self, apid: u16) -> bool;
+        Self::new_for_tm_checked(apid, SequenceFlags::Unsegmented, seq_count, data_len)
-    });
+    }
 
-    delegate!(to self.psc {
+    /// Variant of [SpHeader::new_for_tc_checked] which sets the sequence flag field to [SequenceFlags::Unsegmented]
-        /// Returns [false] and fails if the sequence count exceeds [MAX_SEQ_COUNT]
+    #[inline]
-        pub fn set_seq_count(&mut self, seq_count: u16) -> bool;
+    pub fn new_for_unseg_tc_checked(apid: u16, seq_count: u16, data_len: u16) -> Option<Self> {
-    });
+        Self::new_for_tc_checked(apid, SequenceFlags::Unsegmented, seq_count, data_len)
+    }
 
+    /// Variant of [SpHeader::new_for_tc] which sets the sequence flag field to [SequenceFlags::Unsegmented].
+    ///
+    /// This is an unchecked constructor which can panic on invalid input.
+    #[inline]
+    pub const fn new_for_unseg_tc(apid: u16, seq_count: u16, data_len: u16) -> Self {
+        Self::new_for_tc(apid, SequenceFlags::Unsegmented, seq_count, data_len)
+    }
+
+    /// Variant of [SpHeader::new_for_tm] which sets the sequence flag field to [SequenceFlags::Unsegmented].
+    ///
+    /// This is an unchecked constructor which can panic on invalid input.
+    #[inline]
+    pub const fn new_for_unseg_tm(apid: u16, seq_count: u16, data_len: u16) -> Self {
+        Self::new_for_tm(apid, SequenceFlags::Unsegmented, seq_count, data_len)
+    }
+
+    delegate! {
+        to self.packet_id {
+            /// Returns [false] and fails if the APID exceeds [MAX_APID]
+            #[inline]
+            pub fn set_apid(&mut self, apid: u16) -> bool;
+        }
+    }
+
+    delegate! {
+        to self.psc {
+            /// Returns [false] and fails if the sequence count exceeds [MAX_SEQ_COUNT]
+            #[inline]
+            pub fn set_seq_count(&mut self, seq_count: u16) -> bool;
+        }
+    }
+
+    #[inline]
     pub fn set_seq_flags(&mut self, seq_flags: SequenceFlags) {
         self.psc.seq_flags = seq_flags;
     }
 
+    #[inline]
     pub fn set_sec_header_flag(&mut self) {
         self.packet_id.sec_header_flag = true;
     }
 
+    #[inline]
     pub fn clear_sec_header_flag(&mut self) {
         self.packet_id.sec_header_flag = false;
     }
 
+    #[inline]
     pub fn set_packet_type(&mut self, packet_type: PacketType) {
         self.packet_id.ptype = packet_type;
     }
@@ -631,6 +755,15 @@ impl SpHeader {
             .ok_or(ByteConversionError::ZeroCopyToError)?;
         Ok(&mut buf[CCSDS_HEADER_LEN..])
     }
+
+    /// Create a vector containing the CCSDS header.
+    #[cfg(feature = "alloc")]
+    pub fn to_vec(&self) -> alloc::vec::Vec<u8> {
+        let mut vec = alloc::vec![0; CCSDS_HEADER_LEN];
+        // This can not fail.
+        self.write_to_be_bytes(&mut vec[..]).unwrap();
+        vec
+    }
 }
 
 impl CcsdsPacket for SpHeader {
@@ -656,6 +789,7 @@ impl CcsdsPacket for SpHeader {
 }
 
 impl CcsdsPrimaryHeader for SpHeader {
+    #[inline]
     fn from_composite_fields(
         packet_id: PacketId,
         psc: PacketSequenceCtrl,
@@ -723,9 +857,12 @@ pub mod zc {
             ((self.version_packet_id.get() >> 13) as u8) & 0b111
         }
 
+        #[inline]
         fn packet_id(&self) -> PacketId {
             PacketId::from(self.packet_id_raw())
         }
+
+        #[inline]
         fn psc(&self) -> PacketSequenceCtrl {
             PacketSequenceCtrl::from(self.psc_raw())
         }
@@ -735,10 +872,12 @@ pub mod zc {
             self.data_len.get()
         }
 
+        #[inline]
         fn packet_id_raw(&self) -> u16 {
             self.version_packet_id.get() & (!VERSION_MASK)
         }
 
+        #[inline]
         fn psc_raw(&self) -> u16 {
             self.psc.get()
         }
@@ -762,6 +901,8 @@ pub mod zc {
 pub(crate) mod tests {
     use std::collections::HashSet;
 
+    #[allow(unused_imports)]
+    use crate::ByteConversionError;
     #[cfg(feature = "serde")]
     use crate::CcsdsPrimaryHeader;
     use crate::{
@@ -778,12 +919,12 @@ pub(crate) mod tests {
     use serde::{de::DeserializeOwned, Serialize};
 
     const CONST_SP: SpHeader = SpHeader::new(
-        PacketId::const_tc(true, 0x36),
+        PacketId::new_for_tc(true, 0x36),
-        PacketSequenceCtrl::const_new(SequenceFlags::ContinuationSegment, 0x88),
+        PacketSequenceCtrl::new(SequenceFlags::ContinuationSegment, 0x88),
         0x90,
     );
 
-    const PACKET_ID_TM: PacketId = PacketId::const_tm(true, 0x22);
+    const PACKET_ID_TM: PacketId = PacketId::new_for_tm(true, 0x22);
 
     #[cfg(feature = "serde")]
     pub(crate) fn generic_serde_test<T: Serialize + DeserializeOwned + PartialEq + Debug>(
@@ -795,11 +936,12 @@ pub(crate) mod tests {
     }
 
     #[test]
+    #[allow(clippy::assertions_on_constants)]
     fn verify_const_packet_id() {
         assert_eq!(PACKET_ID_TM.apid(), 0x22);
         assert!(PACKET_ID_TM.sec_header_flag);
         assert_eq!(PACKET_ID_TM.ptype, PacketType::Tm);
-        let const_tc_id = PacketId::const_tc(true, 0x23);
+        let const_tc_id = PacketId::new_for_tc(true, 0x23);
         assert_eq!(const_tc_id.ptype, PacketType::Tc);
     }
 
@@ -813,27 +955,27 @@ pub(crate) mod tests {
 
     #[test]
     fn test_packet_id_ctors() {
-        let packet_id = PacketId::new(PacketType::Tc, true, 0x1ff);
+        let packet_id = PacketId::new_checked(PacketType::Tc, true, 0x1ff);
         assert!(packet_id.is_some());
         let packet_id = packet_id.unwrap();
         assert_eq!(packet_id.apid(), 0x1ff);
         assert_eq!(packet_id.ptype, PacketType::Tc);
         assert!(packet_id.sec_header_flag);
-        let packet_id_tc = PacketId::tc(true, 0x1ff);
+        let packet_id_tc = PacketId::new_for_tc_checked(true, 0x1ff);
         assert!(packet_id_tc.is_some());
         let packet_id_tc = packet_id_tc.unwrap();
         assert_eq!(packet_id_tc, packet_id);
-        let packet_id_tm = PacketId::tm(true, 0x2ff);
+        let packet_id_tm = PacketId::new_for_tm_checked(true, 0x2ff);
         assert!(packet_id_tm.is_some());
         let packet_id_tm = packet_id_tm.unwrap();
-        assert_eq!(packet_id_tm.sec_header_flag, true);
+        assert!(packet_id_tm.sec_header_flag);
         assert_eq!(packet_id_tm.ptype, PacketType::Tm);
         assert_eq!(packet_id_tm.apid, 0x2ff);
     }
 
     #[test]
     fn verify_const_sp_header() {
-        assert_eq!(CONST_SP.sec_header_flag(), true);
+        assert!(CONST_SP.sec_header_flag());
         assert_eq!(CONST_SP.apid(), 0x36);
         assert_eq!(
             CONST_SP.sequence_flags(),
@@ -874,7 +1016,7 @@ pub(crate) mod tests {
     #[test]
     fn test_packet_id() {
         let packet_id =
-            PacketId::new(PacketType::Tm, false, 0x42).expect("Packet ID creation failed");
+            PacketId::new_checked(PacketType::Tm, false, 0x42).expect("Packet ID creation failed");
         assert_eq!(packet_id.raw(), 0x0042);
         let packet_id_from_raw = PacketId::from(packet_id.raw());
         assert_eq!(
@@ -882,26 +1024,26 @@ pub(crate) mod tests {
             PacketType::Tm
         );
         assert_eq!(packet_id_from_raw, packet_id);
-        let packet_id_from_new = PacketId::new(PacketType::Tm, false, 0x42).unwrap();
+        let packet_id_from_new = PacketId::new_checked(PacketType::Tm, false, 0x42).unwrap();
         assert_eq!(packet_id_from_new, packet_id);
     }
 
     #[test]
     fn test_invalid_packet_id() {
-        let packet_id_invalid = PacketId::new(PacketType::Tc, true, 0xFFFF);
+        let packet_id_invalid = PacketId::new_checked(PacketType::Tc, true, 0xFFFF);
         assert!(packet_id_invalid.is_none());
     }
 
     #[test]
     fn test_invalid_apid_setter() {
         let mut packet_id =
-            PacketId::new(PacketType::Tm, false, 0x42).expect("Packet ID creation failed");
+            PacketId::new_checked(PacketType::Tm, false, 0x42).expect("Packet ID creation failed");
         assert!(!packet_id.set_apid(0xffff));
     }
 
     #[test]
     fn test_invalid_seq_count() {
-        let mut psc = PacketSequenceCtrl::new(SequenceFlags::ContinuationSegment, 77)
+        let mut psc = PacketSequenceCtrl::new_checked(SequenceFlags::ContinuationSegment, 77)
             .expect("PSC creation failed");
         assert_eq!(psc.seq_count(), 77);
         assert!(!psc.set_seq_count(0xffff));
@@ -909,7 +1051,7 @@ pub(crate) mod tests {
 
     #[test]
     fn test_packet_seq_ctrl() {
-        let mut psc = PacketSequenceCtrl::new(SequenceFlags::ContinuationSegment, 77)
+        let mut psc = PacketSequenceCtrl::new_checked(SequenceFlags::ContinuationSegment, 77)
             .expect("PSC creation failed");
         assert_eq!(psc.raw(), 77);
         let psc_from_raw = PacketSequenceCtrl::from(psc.raw());
@@ -918,16 +1060,18 @@ pub(crate) mod tests {
         assert!(!psc.set_seq_count(2u16.pow(15)));
         assert_eq!(psc.raw(), 77);
 
-        let psc_invalid = PacketSequenceCtrl::new(SequenceFlags::FirstSegment, 0xFFFF);
+        let psc_invalid = PacketSequenceCtrl::new_checked(SequenceFlags::FirstSegment, 0xFFFF);
         assert!(psc_invalid.is_none());
-        let psc_from_new = PacketSequenceCtrl::new(SequenceFlags::ContinuationSegment, 77).unwrap();
+        let psc_from_new =
+            PacketSequenceCtrl::new_checked(SequenceFlags::ContinuationSegment, 77).unwrap();
         assert_eq!(psc_from_new, psc);
     }
 
     #[test]
     #[cfg(feature = "serde")]
     fn test_serde_sph() {
-        let sp_header = SpHeader::tc_unseg(0x42, 12, 0).expect("Error creating SP header");
+        let sp_header =
+            SpHeader::new_for_unseg_tc_checked(0x42, 12, 0).expect("Error creating SP header");
         assert_eq!(sp_header.ccsds_version(), 0b000);
         assert!(sp_header.is_tc());
         assert!(!sp_header.sec_header_flag());
@@ -949,7 +1093,8 @@ pub(crate) mod tests {
         assert_eq!(sp_header.ccsds_version(), 0b000);
         assert_eq!(sp_header.data_len, 0);
 
-        let sp_header = SpHeader::tm_unseg(0x7, 22, 36).expect("Error creating SP header");
+        let sp_header =
+            SpHeader::new_for_unseg_tm_checked(0x7, 22, 36).expect("Error creating SP header");
         assert_eq!(sp_header.ccsds_version(), 0b000);
         assert!(sp_header.is_tm());
         assert!(!sp_header.sec_header_flag());
@@ -963,8 +1108,8 @@ pub(crate) mod tests {
         assert_eq!(sp_header.ccsds_version(), 0b000);
 
         let from_comp_fields = SpHeader::from_composite_fields(
-            PacketId::new(PacketType::Tc, true, 0x42).unwrap(),
+            PacketId::new(PacketType::Tc, true, 0x42),
-            PacketSequenceCtrl::new(SequenceFlags::Unsegmented, 0x7).unwrap(),
+            PacketSequenceCtrl::new(SequenceFlags::Unsegmented, 0x7),
             0,
             None,
         );
@@ -981,7 +1126,7 @@ pub(crate) mod tests {
 
     #[test]
     fn test_setters() {
-        let sp_header = SpHeader::tc(0x42, SequenceFlags::Unsegmented, 25, 0);
+        let sp_header = SpHeader::new_for_tc_checked(0x42, SequenceFlags::Unsegmented, 25, 0);
         assert!(sp_header.is_some());
         let mut sp_header = sp_header.unwrap();
         sp_header.set_apid(0x12);
@@ -999,7 +1144,7 @@ pub(crate) mod tests {
 
     #[test]
     fn test_tc_ctor() {
-        let sp_header = SpHeader::tc(0x42, SequenceFlags::Unsegmented, 25, 0);
+        let sp_header = SpHeader::new_for_tc_checked(0x42, SequenceFlags::Unsegmented, 25, 0);
         assert!(sp_header.is_some());
         let sp_header = sp_header.unwrap();
         verify_sp_fields(PacketType::Tc, &sp_header);
@@ -1007,23 +1152,35 @@ pub(crate) mod tests {
 
     #[test]
     fn test_tc_ctor_unseg() {
-        let sp_header = SpHeader::tc_unseg(0x42, 25, 0);
+        let sp_header = SpHeader::new_for_unseg_tc_checked(0x42, 25, 0);
         assert!(sp_header.is_some());
         let sp_header = sp_header.unwrap();
         verify_sp_fields(PacketType::Tc, &sp_header);
     }
 
+    #[test]
+    fn test_tc_ctor_unseg_const() {
+        let sp_header = SpHeader::new_for_unseg_tc(0x42, 25, 0);
+        verify_sp_fields(PacketType::Tc, &sp_header);
+    }
+
     #[test]
     fn test_tm_ctor() {
-        let sp_header = SpHeader::tm(0x42, SequenceFlags::Unsegmented, 25, 0);
+        let sp_header = SpHeader::new_for_tm_checked(0x42, SequenceFlags::Unsegmented, 25, 0);
         assert!(sp_header.is_some());
         let sp_header = sp_header.unwrap();
         verify_sp_fields(PacketType::Tm, &sp_header);
     }
 
+    #[test]
+    fn test_tm_ctor_const() {
+        let sp_header = SpHeader::new_for_tm(0x42, SequenceFlags::Unsegmented, 25, 0);
+        verify_sp_fields(PacketType::Tm, &sp_header);
+    }
+
     #[test]
     fn test_tm_ctor_unseg() {
-        let sp_header = SpHeader::tm_unseg(0x42, 25, 0);
+        let sp_header = SpHeader::new_for_unseg_tm_checked(0x42, 25, 0);
         assert!(sp_header.is_some());
         let sp_header = sp_header.unwrap();
         verify_sp_fields(PacketType::Tm, &sp_header);
@@ -1041,8 +1198,8 @@ pub(crate) mod tests {
     fn test_zc_sph() {
         use zerocopy::AsBytes;
 
-        let sp_header =
+        let sp_header = SpHeader::new_for_unseg_tc_checked(0x7FF, pow(2, 14) - 1, 0)
-            SpHeader::tc_unseg(0x7FF, pow(2, 14) - 1, 0).expect("Error creating SP header");
+            .expect("Error creating SP header");
         assert_eq!(sp_header.ptype(), PacketType::Tc);
         assert_eq!(sp_header.apid(), 0x7FF);
         assert_eq!(sp_header.data_len(), 0);
@@ -1107,4 +1264,40 @@ pub(crate) mod tests {
         let mut id_set = HashSet::new();
         id_set.insert(PacketId::from(1_u16));
     }
+
+    #[test]
+    fn sp_header_from_apid() {
+        let sp_header = SpHeader::new_from_apid(0x03);
+        assert_eq!(sp_header.apid(), 0x03);
+        assert_eq!(sp_header.data_len(), 0);
+    }
+
+    #[test]
+    fn sp_header_from_apid_checked() {
+        let sp_header = SpHeader::new_from_apid_checked(0x03).unwrap();
+        assert_eq!(sp_header.apid(), 0x03);
+        assert_eq!(sp_header.data_len(), 0);
+    }
+
+    #[cfg(feature = "defmt")]
+    fn is_defmt_format<T: defmt::Format>(_t: T) {}
+
+    #[test]
+    #[cfg(feature = "defmt")]
+    fn test_defmt_format() {
+        is_defmt_format(ByteConversionError::ToSliceTooSmall {
+            found: 1,
+            expected: 2,
+        });
+    }
+
+    #[test]
+    fn test_sp_header_as_vec() {
+        let sp_header = SpHeader::new_for_unseg_tc(0x42, 25, 1);
+        let sp_header_as_vec = sp_header.to_vec();
+        let sp_header_read_back = SpHeader::from_be_bytes(&sp_header_as_vec)
+            .expect("Error reading back SP header")
+            .0;
+        assert_eq!(sp_header, sp_header_read_back);
+    }
 }

src/time/ascii.rs

@@ -71,7 +71,19 @@ mod tests {
     use std::format;
 
     #[test]
-    fn test_ascii_timestamp_a_unterminated() {
+    fn test_ascii_timestamp_a_unterminated_epoch() {
+        let date = chrono::DateTime::UNIX_EPOCH;
+        let stamp_formatter = generate_time_code_a(&date);
+        let stamp = format!("{}", stamp_formatter);
+        let t_sep = stamp.find('T');
+        assert!(t_sep.is_some());
+        assert_eq!(t_sep.unwrap(), 10);
+        assert_eq!(stamp.len(), FMT_STR_CODE_A_WITH_SIZE.1);
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)]
+    fn test_ascii_timestamp_a_unterminated_now() {
         let date = Utc::now();
         let stamp_formatter = generate_time_code_a(&date);
         let stamp = format!("{}", stamp_formatter);
@@ -82,7 +94,24 @@ mod tests {
     }
 
     #[test]
-    fn test_ascii_timestamp_a_terminated() {
+    fn test_ascii_timestamp_a_terminated_epoch() {
+        let date = chrono::DateTime::UNIX_EPOCH;
+        let stamp_formatter = generate_time_code_a_terminated(&date);
+        let stamp = format!("{}", stamp_formatter);
+        let t_sep = stamp.find('T');
+        assert!(t_sep.is_some());
+        assert_eq!(t_sep.unwrap(), 10);
+        let z_terminator = stamp.find('Z');
+        assert!(z_terminator.is_some());
+        assert_eq!(
+            z_terminator.unwrap(),
+            FMT_STR_CODE_A_TERMINATED_WITH_SIZE.1 - 1
+        );
+        assert_eq!(stamp.len(), FMT_STR_CODE_A_TERMINATED_WITH_SIZE.1);
+    }
+    #[test]
+    #[cfg_attr(miri, ignore)]
+    fn test_ascii_timestamp_a_terminated_now() {
         let date = Utc::now();
         let stamp_formatter = generate_time_code_a_terminated(&date);
         let stamp = format!("{}", stamp_formatter);
@@ -99,7 +128,19 @@ mod tests {
     }
 
     #[test]
-    fn test_ascii_timestamp_b_unterminated() {
+    fn test_ascii_timestamp_b_unterminated_epoch() {
+        let date = chrono::DateTime::UNIX_EPOCH;
+        let stamp_formatter = generate_time_code_b(&date);
+        let stamp = format!("{}", stamp_formatter);
+        let t_sep = stamp.find('T');
+        assert!(t_sep.is_some());
+        assert_eq!(t_sep.unwrap(), 8);
+        assert_eq!(stamp.len(), FMT_STR_CODE_B_WITH_SIZE.1);
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)]
+    fn test_ascii_timestamp_b_unterminated_now() {
         let date = Utc::now();
         let stamp_formatter = generate_time_code_b(&date);
         let stamp = format!("{}", stamp_formatter);
@@ -110,7 +151,25 @@ mod tests {
     }
 
     #[test]
-    fn test_ascii_timestamp_b_terminated() {
+    fn test_ascii_timestamp_b_terminated_epoch() {
+        let date = chrono::DateTime::UNIX_EPOCH;
+        let stamp_formatter = generate_time_code_b_terminated(&date);
+        let stamp = format!("{}", stamp_formatter);
+        let t_sep = stamp.find('T');
+        assert!(t_sep.is_some());
+        assert_eq!(t_sep.unwrap(), 8);
+        let z_terminator = stamp.find('Z');
+        assert!(z_terminator.is_some());
+        assert_eq!(
+            z_terminator.unwrap(),
+            FMT_STR_CODE_B_TERMINATED_WITH_SIZE.1 - 1
+        );
+        assert_eq!(stamp.len(), FMT_STR_CODE_B_TERMINATED_WITH_SIZE.1);
+    }
+
+    #[test]
+    #[cfg_attr(miri, ignore)]
+    fn test_ascii_timestamp_b_terminated_now() {
         let date = Utc::now();
         let stamp_formatter = generate_time_code_b_terminated(&date);
         let stamp = format!("{}", stamp_formatter);

src/time/cds.rs

@@ -145,6 +145,7 @@ pub fn length_of_day_segment_from_pfield(pfield: u8) -> LengthOfDaySegment {
     LengthOfDaySegment::Short16Bits
 }
 
+#[inline]
 pub fn precision_from_pfield(pfield: u8) -> SubmillisPrecision {
     match pfield & 0b11 {
         0b01 => SubmillisPrecision::Microseconds,
@@ -272,24 +273,29 @@ impl ConversionFromUnix {
 }
 
 impl CdsCommon for ConversionFromUnix {
+    #[inline]
     fn submillis_precision(&self) -> SubmillisPrecision {
         self.submilis_prec
     }
 
+    #[inline]
     fn ms_of_day(&self) -> u32 {
         self.ms_of_day
     }
 
+    #[inline]
     fn ccsds_days_as_u32(&self) -> u32 {
         self.ccsds_days
     }
 
+    #[inline]
     fn submillis(&self) -> u32 {
         self.submillis
     }
 }
 
 impl CdsConverter for ConversionFromUnix {
+    #[inline]
     fn unix_days_seconds(&self) -> i64 {
         self.unix_days_seconds
     }
@@ -302,24 +308,31 @@ struct ConversionFromChronoDatetime {
 }
 
 impl CdsCommon for ConversionFromChronoDatetime {
+    #[inline]
     fn submillis_precision(&self) -> SubmillisPrecision {
         self.submillis_prec
     }
 
     delegate! {
         to self.unix_conversion {
+            #[inline]
             fn ms_of_day(&self) -> u32;
+            #[inline]
             fn ccsds_days_as_u32(&self) -> u32;
         }
     }
 
+    #[inline]
     fn submillis(&self) -> u32 {
         self.submillis
     }
 }
 
 impl CdsConverter for ConversionFromChronoDatetime {
-    delegate! {to self.unix_conversion { fn unix_days_seconds(&self) -> i64; }}
+    delegate! {to self.unix_conversion {
+        #[inline]
+        fn unix_days_seconds(&self) -> i64;
+    }}
 }
 
 #[inline]
@@ -1609,6 +1622,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_time_now() {
         let timestamp_now = CdsTime::now_with_u16_days().unwrap();
         let compare_stamp = chrono::Utc::now();
@@ -1616,6 +1630,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_time_now_us_prec() {
         let timestamp_now = CdsTime::now_with_u16_days_us_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
@@ -1623,6 +1638,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_time_now_ps_prec() {
         let timestamp_now = CdsTime::from_now_with_u16_days_ps_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
@@ -1630,6 +1646,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_time_now_ps_prec_u16_days() {
         let timestamp_now = CdsTime::from_now_with_u16_days_ps_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
@@ -1637,6 +1654,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_time_now_ps_prec_u24_days() {
         let timestamp_now = CdsTime::now_with_u24_days_ps_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
@@ -2293,6 +2311,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_update_from_now() {
         let mut stamp = CdsTime::new_with_u16_days(0, 0);
         let _ = stamp.update_from_now();
@@ -2308,6 +2327,7 @@ mod tests {
 
     #[test]
     #[cfg(feature = "serde")]
+    #[cfg_attr(miri, ignore)]
     fn test_serialization() {
         let stamp_now = CdsTime::now_with_u16_days().expect("Error retrieving time");
         let val = to_allocvec(&stamp_now).expect("Serializing timestamp failed");

src/time/cuc.rs

@@ -177,6 +177,7 @@ pub struct FractionalPart {
 }
 
 impl FractionalPart {
+    #[inline]
     pub const fn new(resolution: FractionalResolution, counter: u32) -> Self {
         let div = fractional_res_to_div(resolution);
         assert!(counter <= div, "invalid counter for resolution");
@@ -187,15 +188,18 @@ impl FractionalPart {
     }
 
     /// An empty fractional part for second resolution only.
+    #[inline]
     pub const fn new_with_seconds_resolution() -> Self {
         Self::new(FractionalResolution::Seconds, 0)
     }
 
     /// Helper method which simply calls [Self::new_with_seconds_resolution].
+    #[inline]
     pub const fn new_empty() -> Self {
         Self::new_with_seconds_resolution()
     }
 
+    #[inline]
     pub fn new_checked(resolution: FractionalResolution, counter: u32) -> Option<Self> {
         let div = fractional_res_to_div(resolution);
         if counter > div {
@@ -207,14 +211,17 @@ impl FractionalPart {
         })
     }
 
+    #[inline]
     pub fn resolution(&self) -> FractionalResolution {
         self.resolution
     }
 
+    #[inline]
     pub fn counter(&self) -> u32 {
         self.counter
     }
 
+    #[inline]
     pub fn no_fractional_part(&self) -> bool {
         self.resolution == FractionalResolution::Seconds
     }
@@ -285,6 +292,7 @@ pub struct CucTimeWithLeapSecs {
 }
 
 impl CucTimeWithLeapSecs {
+    #[inline]
     pub fn new(time: CucTime, leap_seconds: u32) -> Self {
         Self { time, leap_seconds }
     }
@@ -300,6 +308,7 @@ pub fn pfield_len(pfield: u8) -> usize {
 
 impl CucTime {
     /// Create a time provider with a four byte counter and no fractional part.
+    #[inline]
     pub fn new(counter: u32) -> Self {
         // These values are definitely valid, so it is okay to unwrap here.
         Self::new_generic(
@@ -310,11 +319,13 @@ impl CucTime {
     }
 
     /// Like [CucTime::new] but allow to supply a fractional part as well.
+    #[inline]
     pub fn new_with_fractions(counter: u32, fractions: FractionalPart) -> Result<Self, CucError> {
         Self::new_generic(WidthCounterPair(4, counter), fractions)
     }
 
     /// Fractions with a resolution of ~ 4 ms
+    #[inline]
     pub fn new_with_coarse_fractions(counter: u32, subsec_fractions: u8) -> Self {
         // These values are definitely valid, so it is okay to unwrap here.
         Self::new_generic(
@@ -328,6 +339,7 @@ impl CucTime {
     }
 
     /// Fractions with a resolution of ~ 16 us
+    #[inline]
     pub fn new_with_medium_fractions(counter: u32, subsec_fractions: u16) -> Self {
         // These values are definitely valid, so it is okay to unwrap here.
         Self::new_generic(
@@ -343,6 +355,7 @@ impl CucTime {
     /// Fractions with a resolution of ~ 60 ns. The fractional part value is limited by the
     /// 24 bits of the fractional field, so this function will fail with
     /// [CucError::InvalidFractions] if the fractional value exceeds the value.
+    #[inline]
     pub fn new_with_fine_fractions(counter: u32, subsec_fractions: u32) -> Result<Self, CucError> {
         Self::new_generic(
             WidthCounterPair(4, counter),
@@ -457,6 +470,7 @@ impl CucTime {
 
     /// Most generic constructor which allows full configurability for the counter and for the
     /// fractions.
+    #[inline]
     pub fn new_generic(
         width_and_counter: WidthCounterPair,
         fractions: FractionalPart,
@@ -476,31 +490,38 @@ impl CucTime {
         })
     }
 
+    #[inline]
     pub fn ccsds_time_code(&self) -> CcsdsTimeCode {
         CcsdsTimeCode::CucCcsdsEpoch
     }
 
+    #[inline]
     pub fn width_counter_pair(&self) -> WidthCounterPair {
         self.counter
     }
 
+    #[inline]
     pub fn counter_width(&self) -> u8 {
         self.counter.0
     }
 
+    #[inline]
     pub fn counter(&self) -> u32 {
         self.counter.1
     }
 
     /// Subsecond fractional part of the CUC time.
+    #[inline]
     pub fn fractions(&self) -> FractionalPart {
         self.fractions
     }
 
+    #[inline]
     pub fn to_leap_sec_helper(&self, leap_seconds: u32) -> CucTimeWithLeapSecs {
         CucTimeWithLeapSecs::new(*self, leap_seconds)
     }
 
+    #[inline]
     pub fn set_fractions(&mut self, fractions: FractionalPart) -> Result<(), CucError> {
         Self::verify_fractions_value(fractions)?;
         self.fractions = fractions;
@@ -510,6 +531,7 @@ impl CucTime {
 
     /// Set a fractional resolution. Please note that this function will reset the fractional value
     /// to 0 if the resolution changes.
+    #[inline]
     pub fn set_fractional_resolution(&mut self, res: FractionalResolution) {
         if res == FractionalResolution::Seconds {
             self.fractions = FractionalPart::new_with_seconds_resolution();
@@ -519,6 +541,7 @@ impl CucTime {
         }
     }
 
+    #[inline]
     fn build_p_field(counter_width: u8, resolution: FractionalResolution) -> u8 {
         let mut pfield = P_FIELD_BASE;
         if !(1..=4).contains(&counter_width) {
@@ -538,6 +561,7 @@ impl CucTime {
         pfield
     }
 
+    #[inline]
     fn update_p_field_fractions(&mut self) {
         self.pfield &= !(0b11);
         self.pfield |= self.fractions.resolution() as u8;
@@ -582,6 +606,7 @@ impl CucTime {
         )
     }
 
+    #[inline]
     pub fn len_packed_from_pfield(pfield: u8) -> usize {
         let mut base_len: usize = 1;
         base_len += Self::len_cntr_from_pfield(pfield) as usize;
@@ -590,6 +615,7 @@ impl CucTime {
     }
 
     /// Verifies the raw width parameter.
+    #[inline]
     fn verify_counter_width(width: u8) -> Result<(), CucError> {
         if width == 0 || width > 4 {
             return Err(CucError::InvalidCounterWidth(width));
@@ -597,6 +623,7 @@ impl CucTime {
         Ok(())
     }
 
+    #[inline]
     fn verify_fractions_value(val: FractionalPart) -> Result<(), CucError> {
         if val.counter > 2u32.pow((val.resolution as u32) * 8) - 1 {
             return Err(CucError::InvalidFractions {
@@ -607,10 +634,12 @@ impl CucTime {
         Ok(())
     }
 
+    #[inline]
     fn len_as_bytes(&self) -> usize {
         Self::len_packed_from_pfield(self.pfield)
     }
 
+    #[inline]
     fn subsec_nanos(&self) -> u32 {
         if self.fractions.resolution() == FractionalResolution::Seconds {
             return 0;
@@ -751,22 +780,27 @@ impl TimeWriter for CucTime {
 }
 
 impl CcsdsTimeProvider for CucTimeWithLeapSecs {
+    #[inline]
     fn len_as_bytes(&self) -> usize {
         self.time.len_as_bytes()
     }
 
+    #[inline]
     fn p_field(&self) -> (usize, [u8; 2]) {
         (1, [self.time.pfield, 0])
     }
 
+    #[inline]
     fn ccdsd_time_code(&self) -> CcsdsTimeCode {
         self.time.ccsds_time_code()
     }
 
+    #[inline]
     fn unix_secs(&self) -> i64 {
         self.time.unix_secs(self.leap_seconds)
     }
 
+    #[inline]
     fn subsec_nanos(&self) -> u32 {
         self.time.subsec_nanos()
     }
@@ -913,6 +947,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_datetime_now() {
         let now = chrono::Utc::now();
         let cuc_now = CucTime::now(FractionalResolution::SixtyNs, LEAP_SECONDS);
@@ -1244,6 +1279,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn set_fract_resolution() {
         let mut stamp = CucTime::new(2000);
         stamp.set_fractional_resolution(FractionalResolution::SixtyNs);

src/time/mod.rs

@@ -166,6 +166,7 @@ pub fn seconds_since_epoch() -> f64 {
 ///
 ///  - CCSDS epoch: 1958-01-01T00:00:00+00:00
 ///  - UNIX Epoch: 1970-01-01T00:00:00+00:00
+#[inline]
 pub const fn unix_to_ccsds_days(unix_days: i64) -> i64 {
     unix_days - DAYS_CCSDS_TO_UNIX as i64
 }
@@ -174,16 +175,19 @@ pub const fn unix_to_ccsds_days(unix_days: i64) -> i64 {
 ///
 ///  - CCSDS epoch: 1958-01-01T00:00:00+00:00
 ///  - UNIX Epoch: 1970-01-01T00:00:00+00:00
+#[inline]
 pub const fn ccsds_to_unix_days(ccsds_days: i64) -> i64 {
     ccsds_days + DAYS_CCSDS_TO_UNIX as i64
 }
 
 /// Similar to [unix_to_ccsds_days] but converts the epoch instead, which is the number of elpased
 /// seconds since the CCSDS and UNIX epoch times.
+#[inline]
 pub const fn unix_epoch_to_ccsds_epoch(unix_epoch: i64) -> i64 {
     unix_epoch - (DAYS_CCSDS_TO_UNIX as i64 * SECONDS_PER_DAY as i64)
 }
 
+#[inline]
 pub const fn ccsds_epoch_to_unix_epoch(ccsds_epoch: i64) -> i64 {
     ccsds_epoch + (DAYS_CCSDS_TO_UNIX as i64 * SECONDS_PER_DAY as i64)
 }
@@ -547,6 +551,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_get_current_time() {
         let sec_floats = seconds_since_epoch();
         assert!(sec_floats > 0.0);
@@ -561,6 +566,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_ccsds_epoch() {
         let now = SystemTime::now()
             .duration_since(SystemTime::UNIX_EPOCH)
@@ -681,6 +687,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(miri, ignore)]
     fn test_from_now() {
         let stamp_now = UnixTime::now().unwrap();
         let dt_now = stamp_now.chrono_date_time().unwrap();

src/util.rs

@@ -15,10 +15,12 @@ pub trait ToBeBytes {
 impl ToBeBytes for () {
     type ByteArray = [u8; 0];
 
+    #[inline]
     fn written_len(&self) -> usize {
         0
     }
 
+    #[inline]
     fn to_be_bytes(&self) -> Self::ByteArray {
         []
     }
@@ -27,9 +29,12 @@ impl ToBeBytes for () {
 impl ToBeBytes for u8 {
     type ByteArray = [u8; 1];
 
+    #[inline]
     fn written_len(&self) -> usize {
         1
     }
+
+    #[inline]
     fn to_be_bytes(&self) -> Self::ByteArray {
         u8::to_be_bytes(*self)
     }
@@ -38,9 +43,12 @@ impl ToBeBytes for u8 {
 impl ToBeBytes for u16 {
     type ByteArray = [u8; 2];
 
+    #[inline]
     fn written_len(&self) -> usize {
         2
     }
+
+    #[inline]
     fn to_be_bytes(&self) -> Self::ByteArray {
         u16::to_be_bytes(*self)
     }
@@ -49,9 +57,12 @@ impl ToBeBytes for u16 {
 impl ToBeBytes for u32 {
     type ByteArray = [u8; 4];
 
+    #[inline]
     fn written_len(&self) -> usize {
         4
     }
+
+    #[inline]
     fn to_be_bytes(&self) -> Self::ByteArray {
         u32::to_be_bytes(*self)
     }
@@ -60,9 +71,12 @@ impl ToBeBytes for u32 {
 impl ToBeBytes for u64 {
     type ByteArray = [u8; 8];
 
+    #[inline]
     fn written_len(&self) -> usize {
         8
     }
+
+    #[inline]
     fn to_be_bytes(&self) -> Self::ByteArray {
         u64::to_be_bytes(*self)
     }
@@ -104,6 +118,7 @@ pub enum UnsignedByteFieldError {
 }
 
 impl From<ByteConversionError> for UnsignedByteFieldError {
+    #[inline]
     fn from(value: ByteConversionError) -> Self {
         Self::ByteConversionError(value)
     }
@@ -138,14 +153,17 @@ pub struct UnsignedByteField {
 }
 
 impl UnsignedByteField {
+    #[inline]
     pub const fn new(width: usize, value: u64) -> Self {
         Self { width, value }
     }
 
+    #[inline]
     pub const fn value_const(&self) -> u64 {
         self.value
     }
 
+    #[inline]
     pub fn new_from_be_bytes(width: usize, buf: &[u8]) -> Result<Self, UnsignedByteFieldError> {
         if width > buf.len() {
             return Err(ByteConversionError::FromSliceTooSmall {
@@ -178,10 +196,12 @@ impl UnsignedByteField {
 }
 
 impl UnsignedEnum for UnsignedByteField {
+    #[inline]
     fn size(&self) -> usize {
         self.width
     }
 
+    #[inline]
     fn value(&self) -> u64 {
         self.value_const()
     }
@@ -237,6 +257,7 @@ impl<TYPE: Copy + Into<u64>> GenericUnsignedByteField<TYPE> {
 }
 
 impl<TYPE: Copy + ToBeBytes + Into<u64>> UnsignedEnum for GenericUnsignedByteField<TYPE> {
+    #[inline]
     fn size(&self) -> usize {
         self.value.written_len()
     }
@@ -252,6 +273,7 @@ impl<TYPE: Copy + ToBeBytes + Into<u64>> UnsignedEnum for GenericUnsignedByteFie
         Ok(self.value.written_len())
     }
 
+    #[inline]
     fn value(&self) -> u64 {
         self.value_typed().into()
     }
@@ -277,6 +299,7 @@ impl From<UnsignedByteFieldU8> for UnsignedByteField {
 impl TryFrom<UnsignedByteField> for UnsignedByteFieldU8 {
     type Error = UnsignedByteFieldError;
 
+    #[inline]
     fn try_from(value: UnsignedByteField) -> Result<Self, Self::Error> {
         if value.width != 1 {
             return Err(UnsignedByteFieldError::InvalidWidth {
@@ -289,6 +312,7 @@ impl TryFrom<UnsignedByteField> for UnsignedByteFieldU8 {
 }
 
 impl From<UnsignedByteFieldU16> for UnsignedByteField {
+    #[inline]
     fn from(value: UnsignedByteFieldU16) -> Self {
         Self::new(2, value.value as u64)
     }
@@ -297,6 +321,7 @@ impl From<UnsignedByteFieldU16> for UnsignedByteField {
 impl TryFrom<UnsignedByteField> for UnsignedByteFieldU16 {
     type Error = UnsignedByteFieldError;
 
+    #[inline]
     fn try_from(value: UnsignedByteField) -> Result<Self, Self::Error> {
         if value.width != 2 {
             return Err(UnsignedByteFieldError::InvalidWidth {
@@ -309,6 +334,7 @@ impl TryFrom<UnsignedByteField> for UnsignedByteFieldU16 {
 }
 
 impl From<UnsignedByteFieldU32> for UnsignedByteField {
+    #[inline]
     fn from(value: UnsignedByteFieldU32) -> Self {
         Self::new(4, value.value as u64)
     }
@@ -317,6 +343,7 @@ impl From<UnsignedByteFieldU32> for UnsignedByteField {
 impl TryFrom<UnsignedByteField> for UnsignedByteFieldU32 {
     type Error = UnsignedByteFieldError;
 
+    #[inline]
     fn try_from(value: UnsignedByteField) -> Result<Self, Self::Error> {
         if value.width != 4 {
             return Err(UnsignedByteFieldError::InvalidWidth {
@@ -329,6 +356,7 @@ impl TryFrom<UnsignedByteField> for UnsignedByteFieldU32 {
 }
 
 impl From<UnsignedByteFieldU64> for UnsignedByteField {
+    #[inline]
     fn from(value: UnsignedByteFieldU64) -> Self {
         Self::new(8, value.value)
     }
@@ -337,6 +365,7 @@ impl From<UnsignedByteFieldU64> for UnsignedByteField {
 impl TryFrom<UnsignedByteField> for UnsignedByteFieldU64 {
     type Error = UnsignedByteFieldError;
 
+    #[inline]
     fn try_from(value: UnsignedByteField) -> Result<Self, Self::Error> {
         if value.width != 8 {
             return Err(UnsignedByteFieldError::InvalidWidth {