diff options
Diffstat (limited to 'vendor/iana-time-zone-haiku/src/lib.rs')
-rw-r--r-- | vendor/iana-time-zone-haiku/src/lib.rs | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/iana-time-zone-haiku/src/lib.rs b/vendor/iana-time-zone-haiku/src/lib.rs new file mode 100644 index 000000000..55681a267 --- /dev/null +++ b/vendor/iana-time-zone-haiku/src/lib.rs @@ -0,0 +1,68 @@ +#![warn(clippy::all)] +#![warn(clippy::cargo)] +#![warn(clippy::undocumented_unsafe_blocks)] +#![allow(unknown_lints)] +#![warn(missing_copy_implementations)] +#![warn(missing_debug_implementations)] +#![warn(missing_docs)] +#![warn(rust_2018_idioms)] +#![warn(trivial_casts, trivial_numeric_casts)] +#![warn(unsafe_op_in_unsafe_fn)] +#![warn(unused_qualifications)] +#![warn(variant_size_differences)] + +//! # iana-time-zone-haiku +//! +//! [![Crates.io](https://img.shields.io/crates/v/iana-time-zone-haiku.svg)](https://crates.io/crates/iana-time-zone-haiku) +//! [![Documentation](https://docs.rs/iana-time-zone/badge.svg)](https://docs.rs/iana-time-zone/) +//! [![Crate License](https://img.shields.io/crates/l/iana-time-zone-haiku-haiku.svg)](https://crates.io/crates/iana-time-zone-haiku) +//! [![build](https://github.com/strawlab/iana-time-zone/workflows/build/badge.svg?branch=master)](https://github.com/strawlab/iana-time-zone/actions?query=branch%3Amaster) +//! +//! [iana-time-zone](https://github.com/strawlab/iana-time-zone) support crate for Haiku OS. + +#[cxx::bridge(namespace = "iana_time_zone_haiku")] +mod ffi { + // SAFETY: in here "unsafe" is simply part of the syntax + unsafe extern "C++" { + include!("iana-time-zone-haiku/src/interface.h"); + + fn get_tz(buf: &mut [u8]) -> usize; + } +} + +/// Get the current IANA time zone as a string. +/// +/// On Haiku platforms this function will return [`Some`] with the timezone string +/// or [`None`] if an error occurs. On all other platforms, [`None`] is returned. +/// +/// # Examples +/// +/// ``` +/// let timezone = iana_time_zone_haiku::get_timezone(); +/// ``` +pub fn get_timezone() -> Option<String> { + // The longest name in the IANA time zone database is 25 ASCII characters long. + let mut buf = [0u8; 32]; + let len = ffi::get_tz(&mut buf); + // The name should not be empty, or excessively long. + match buf.get(..len)? { + b"" => None, + s => Some(std::str::from_utf8(s).ok()?.to_owned()), + } +} + +#[cfg(test)] +mod tests { + #[test] + #[cfg(not(target_os = "haiku"))] + fn test_fallback_on_non_haiku_platforms() { + assert!(super::get_timezone().is_none()); + } + + #[test] + #[cfg(target_os = "haiku")] + fn test_retrieve_time_zone_on_haiku_platforms() { + let timezone = super::get_timezone().unwrap(); + assert!(!timezone.is_empty()); + } +} |