four-cc-0.3.0/.cargo_vcs_info.json0000644000000001360000000000100123720ustar { "git": { "sha1": "2a3536bc7291e68e588618b2b44ba87d772ecdc8" }, "path_in_vcs": "" }four-cc-0.3.0/.github/dependabot.yml000064400000000000000000000006601046102023000153540ustar 00000000000000# To get started with Dependabot version updates, you'll need to specify which # package ecosystems to update and where the package manifests are located. # Please see the documentation for all configuration options: # https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates version: 2 updates: - package-ecosystem: "cargo" directory: "/" schedule: interval: "weekly" four-cc-0.3.0/.github/workflows/rust.yml000064400000000000000000000006461046102023000163050ustar 00000000000000name: Rust on: push: branches: [ "master" ] pull_request: branches: [ "master" ] env: CARGO_TERM_COLOR: always jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v3 - name: Build run: cargo build --verbose - name: Run no_std tests run: cargo test --no-default-features --verbose - name: Run std tests run: cargo test --features std --verbose four-cc-0.3.0/.gitignore000064400000000000000000000000231046102023000131450ustar 00000000000000/target Cargo.lock four-cc-0.3.0/CHANGELOG.md000064400000000000000000000012471046102023000127770ustar 00000000000000# four-cc Change Log ## 0.3.0 - 2023-05-31 ### Fixed - Now supports usage in `no_std` environments. ### Added - `impl const From for u32` if `nightly` feature enabled. ## 0.2.0 - 2022-05-22 ### Changed - Representation changed to [repr(C)](https://doc.rust-lang.org/nomicon/other-reprs.html#reprc) + [repr(packed)](https://doc.rust-lang.org/nomicon/other-reprs.html#reprpacked). ### Added - Added optional support for [schemars](https://docs.rs/schemars/latest/schemars/), [serde](https://docs.rs/serde/latest/serde/) and [zerocopy](https://docs.rs/zerocopy/latest/zerocopy/). Thanks [@daym](https://github.com/daym)! ## 0.1.0 - Initial release four-cc-0.3.0/Cargo.toml0000644000000017620000000000100103760ustar # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g., crates.io) dependencies. # # If you are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] edition = "2018" name = "four-cc" version = "0.3.0" authors = ["David Holroyd "] description = "Newtype wrapper providing a convenient representation of four-character-code values" license = "MIT/Apache-2.0" repository = "https://github.com/dholroyd/four-cc" [dependencies.schemars] version = "0.8.8" optional = true [dependencies.serde] version = "1.0" features = ["derive"] optional = true [dependencies.zerocopy] version = "0.6.1" optional = true [features] default = ["std"] nightly = [] std = [] four-cc-0.3.0/Cargo.toml.orig000064400000000000000000000011671046102023000140560ustar 00000000000000[package] name = "four-cc" version = "0.3.0" authors = ["David Holroyd "] edition = "2018" description = "Newtype wrapper providing a convenient representation of four-character-code values" repository = "https://github.com/dholroyd/four-cc" license = "MIT/Apache-2.0" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html [dependencies] schemars = { version = "0.8.8", optional = true } serde = { version = "1.0", features = ["derive"], optional = true } zerocopy = { version = "0.6.1", optional = true } [features] default = ["std"] nightly = [] std = [] four-cc-0.3.0/LICENSE-APACHE000064400000000000000000000251371046102023000131160ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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See the License for the specific language governing permissions and limitations under the License. four-cc-0.3.0/LICENSE-MIT000064400000000000000000000020411046102023000126130ustar 00000000000000Copyright (c) 2020 David Holroyd Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. four-cc-0.3.0/release.toml000064400000000000000000000004301046102023000134740ustar 00000000000000pre-release-replacements = [ {file="CHANGELOG.md", search="## Unreleased", replace="## {{version}} - {{date}}", exactly=1}, ] post-release-replacements = [ {file="CHANGELOG.md", search="# four-cc Change Log", replace="# four-cc Change Log\n\n## Unreleased", exactly=1}, ] four-cc-0.3.0/src/lib.rs000064400000000000000000000167071046102023000131000ustar 00000000000000//! Newtype wrapper providing a convenient representation of _four-character-code_ values. //! //! Using this type in a public APIs as an alternative to simply passing the equivalent `u32` //! makes the value's expected use explicit. //! //! //! ## Creating a FourCC value //! //! ```rust //! use four_cc::FourCC; //! //! let uuid = FourCC(*b"uuid"); //! ``` //! //! ## From a slice //! //! ```rust //! # use four_cc::FourCC; //! let data = b"moofftyp"; //! let code = FourCC::from(&data[0..4]); // would panic if fewer than 4 bytes //! assert_eq!(FourCC(*b"moof"), code); //! ``` //! //! ## Constants //! //! FourCC values can be used in const expressions //! //! ```rust //! # use four_cc::FourCC; //! const UUID: FourCC = FourCC(*b"uuid"); //! ``` //! //! ## Matching //! //! You can use FourCC values in match patterns as long as you define constants to match against, //! //! ```rust //! # use four_cc::FourCC; //! const UUID: FourCC = FourCC(*b"uuid"); //! const MOOV: FourCC = FourCC(*b"moov"); //! # let other_value = UUID; //! match other_value { //! MOOV => println!("movie"), //! UUID => println!("unique identifier"), //! // compiler will not accept: FourCC(*b"trun") => println!("track fragment run"), //! _ => println!("Other value; scary stuff") //! } //! ``` //! //! ## Invalid literal values //! //! If the literal has other than four bytes, compilation will fail //! //! ```compile_fail //! # use four_cc::FourCC; //! let bad_fourcc = FourCC(*b"uuid123"); //! // -> expected an array with a fixed size of 4 elements, found one with 7 elements //! ``` //! **Note** the FourCC value _may_ contain non-printable byte values, including the byte-value zero. //! //! ## Debug display //! //! ```rust //! # use four_cc::FourCC; //! # use std::fmt::Debug; //! let uuid = FourCC(*b"uuid"); //! # assert_eq!("FourCC(uuid)", format!("{:?}", &uuid)); //! println!("it's {:?}", uuid); // produces: it's FourCC{uuid} //! ``` //! //! Note that if the FourCC bytes are not able to be converted to UTF8, then a fallback //! representation will be used (as it would be suprising for `format!()` to panic). //! //! ```rust //! # use four_cc::FourCC; //! # use std::fmt::Debug; //! let uuid = FourCC(*b"u\xFFi\0"); //! # assert_eq!("FourCC(u\\xffi\\x00)", format!("{:?}", &uuid)); //! println!("it's {:?}", uuid); // produces: it's FourCC{u\xffi\x00} //! ``` #![forbid(unsafe_code)] #![deny(rust_2018_idioms, future_incompatible, missing_docs)] #![cfg_attr(feature = "nightly", feature(const_trait_impl))] #![cfg_attr(not(feature = "std"), no_std)] use core::fmt; use core::result::Result; /// A _four-character-code_ value. /// /// See the [module level documentation](index.html). #[derive(Clone,Copy,PartialEq,Eq,Hash)] #[cfg_attr(feature = "zerocopy", derive(zerocopy::FromBytes, zerocopy::AsBytes))] #[repr(C, packed)] pub struct FourCC ( pub [u8; 4] ); impl FourCC { const fn from_u32(self: Self) -> u32 { ((self.0[0] as u32) << 24 & 0xff000000) | ((self.0[1] as u32) << 16 & 0x00ff0000) | ((self.0[2] as u32) << 8 & 0x0000ff00) | ((self.0[3] as u32) & 0x000000ff) } } impl<'a> From<&'a[u8; 4]> for FourCC { fn from(buf: &[u8; 4]) -> FourCC { FourCC([buf[0], buf[1], buf[2], buf[3]]) } } impl<'a> From<&'a[u8]> for FourCC { fn from(buf: &[u8]) -> FourCC { FourCC([buf[0], buf[1], buf[2], buf[3]]) } } impl From for FourCC { fn from(val: u32) -> FourCC { FourCC([ (val >> 24 & 0xff) as u8, (val >> 16 & 0xff) as u8, (val >> 8 & 0xff) as u8, (val & 0xff) as u8 ]) } } // The macro is needed, because the `impl const` syntax doesn't exists on `stable`. #[cfg(not(feature = "nightly"))] macro_rules! from_fourcc_for_u32 { () => { impl From for u32 { fn from(val: FourCC) -> Self { val.from_u32() } } }; } #[cfg(feature = "nightly")] macro_rules! from_fourcc_for_u32 { ($($t:tt)*) => { impl const From for u32 { fn from(val: FourCC) -> Self { val.from_u32() } } }; } from_fourcc_for_u32!(); impl fmt::Display for FourCC { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> { match core::str::from_utf8(&self.0) { Ok(s) => f.write_str(s), Err(_) => { // If we return fmt::Error, then for example format!() will panic, so we choose // an alternative representation instead let b = &self.0; f.write_fmt(format_args!("{}{}{}{}", core::ascii::escape_default(b[0]), core::ascii::escape_default(b[1]), core::ascii::escape_default(b[2]), core::ascii::escape_default(b[3]))) }, } } } impl fmt::Debug for FourCC { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> { let b = self.0; f.debug_tuple("FourCC") .field(&format_args!("{}{}{}{}", core::ascii::escape_default(b[0]), core::ascii::escape_default(b[1]), core::ascii::escape_default(b[2]), core::ascii::escape_default(b[3]))) .finish() } } #[cfg(feature = "schemars")] impl schemars::JsonSchema for FourCC { fn schema_name() -> String { "FourCC".to_string() } fn json_schema(gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema { gen.subschema_for::<&str>() } fn is_referenceable() -> bool { false } } #[cfg(feature = "serde")] impl serde::ser::Serialize for FourCC { fn serialize(&self, serializer: S) -> Result { serializer.collect_str(self) } } #[cfg(feature = "serde")] struct FromStrVisitor { expecting: &'static str, ty: core::marker::PhantomData, } #[cfg(feature = "serde")] impl FromStrVisitor { fn new(expecting: &'static str) -> Self { FromStrVisitor { expecting: expecting, ty: core::marker::PhantomData, } } } #[cfg(feature = "serde")] impl core::str::FromStr for FourCC { type Err = u32; fn from_str(s: &str) -> Result { Ok(s.as_bytes().into()) } } #[cfg(feature = "serde")] impl<'de, T> serde::de::Visitor<'de> for FromStrVisitor where T: core::str::FromStr, T::Err: fmt::Display, { type Value = T; fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result { formatter.write_str(self.expecting) } fn visit_str(self, s: &str) -> Result where E: serde::de::Error, { s.parse().map_err(serde::de::Error::custom) } } #[cfg(feature = "serde")] impl<'de> serde::de::Deserialize<'de> for FourCC { fn deserialize>(deserializer: D) -> Result { deserializer.deserialize_str(FromStrVisitor::new("FourCC")) } } #[cfg(test)] mod tests { use super::*; #[test] fn eq() { assert_eq!(FourCC(*b"uuid"), b"uuid".into()); assert_ne!(FourCC(*b"uuid"), b"diuu".into()); } #[test] fn int_conversions() { assert_eq!(0x41424344u32, FourCC(*b"ABCD").into()); assert_eq!(FourCC(*b"ABCD"), 0x41424344u32.into()); } }