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◆ v0.9.0 oxygen / vendor / iana-time-zone / src / lib.rs
3.6 KiB · Rust · last changed Strata: the cloud stores send through ureq, so every release target links 1 month ago source blame history raw
2cd40ea1 Andy McCall ↶ 1 
#![warn(clippy::all)]
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#![warn(clippy::cargo)]
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#![warn(clippy::undocumented_unsafe_blocks)]
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#![allow(unknown_lints)]
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#![warn(missing_copy_implementations)]
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#![warn(missing_debug_implementations)]
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#![warn(missing_docs)]
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#![warn(rust_2018_idioms)]
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#![warn(trivial_casts, trivial_numeric_casts)]
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#![warn(unused_qualifications)]
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#![warn(variant_size_differences)]
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//! get the IANA time zone for the current system
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//!
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//! This small utility crate provides the
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//! [`get_timezone()`](fn.get_timezone.html) function.
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//!
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//! ```rust
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//! // Get the current time zone as a string.
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//! let tz_str = iana_time_zone::get_timezone()?;
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//! println!("The current time zone is: {}", tz_str);
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//! # Ok::<(), iana_time_zone::GetTimezoneError>(())
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//! ```
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//!
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//! The resulting string can be parsed to a
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//! [`chrono-tz::Tz`](https://docs.rs/chrono-tz/latest/chrono_tz/enum.Tz.html)
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//! variant like this:
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//! ```rust
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//! let tz_str = iana_time_zone::get_timezone()?;
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//! let tz: chrono_tz::Tz = tz_str.parse()?;
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//! # Ok::<(), Box<dyn std::error::Error>>(())
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//! ```
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#[allow(dead_code)]
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mod ffi_utils;
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#[cfg_attr(
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    any(all(target_os = "linux", not(target_env = "ohos")), target_os = "hurd"),
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    path = "tz_linux.rs"
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)]
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#[cfg_attr(all(target_os = "linux", target_env = "ohos"), path = "tz_ohos.rs")]
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#[cfg_attr(target_os = "windows", path = "tz_windows.rs")]
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#[cfg_attr(target_vendor = "apple", path = "tz_linux.rs")]
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#[cfg_attr(
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    all(target_arch = "wasm32", target_os = "unknown"),
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    path = "tz_wasm32_unknown.rs"
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)]
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#[cfg_attr(
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    all(target_arch = "wasm32", target_os = "emscripten"),
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    path = "tz_wasm32_emscripten.rs"
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)]
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#[cfg_attr(
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    any(target_os = "freebsd", target_os = "dragonfly"),
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    path = "tz_freebsd.rs"
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)]
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#[cfg_attr(
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    any(target_os = "netbsd", target_os = "openbsd"),
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    path = "tz_netbsd.rs"
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)]
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#[cfg_attr(
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    any(target_os = "illumos", target_os = "solaris"),
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    path = "tz_illumos.rs"
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)]
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#[cfg_attr(target_os = "aix", path = "tz_aix.rs")]
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#[cfg_attr(target_os = "android", path = "tz_android.rs")]
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#[cfg_attr(target_os = "haiku", path = "tz_haiku.rs")]
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#[cfg_attr(
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    all(target_arch = "wasm32", target_os = "wasi"),
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    path = "tz_wasm32_wasi.rs"
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)]
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mod platform;
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/// Error types
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#[derive(Debug)]
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pub enum GetTimezoneError {
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    /// Failed to parse
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    FailedParsingString,
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    /// Wrapped IO error
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    IoError(std::io::Error),
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    /// Platform-specific error from the operating system
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    OsError,
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}
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impl std::error::Error for GetTimezoneError {
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    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
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        match self {
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            GetTimezoneError::FailedParsingString => None,
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            GetTimezoneError::IoError(err) => Some(err),
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            GetTimezoneError::OsError => None,
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        }
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    }
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}
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impl std::fmt::Display for GetTimezoneError {
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    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
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        f.write_str(match self {
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            GetTimezoneError::FailedParsingString => "GetTimezoneError::FailedParsingString",
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            GetTimezoneError::IoError(err) => return err.fmt(f),
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            GetTimezoneError::OsError => "OsError",
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        })
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    }
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}
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impl From<std::io::Error> for GetTimezoneError {
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    fn from(orig: std::io::Error) -> Self {
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        GetTimezoneError::IoError(orig)
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    }
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}
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/// Get the current IANA time zone as a string.
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///
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/// See the module-level documentation for a usage example and more details
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/// about this function.
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#[inline]
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pub fn get_timezone() -> Result<String, GetTimezoneError> {
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    platform::get_timezone_inner()
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}
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#[cfg(test)]
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mod tests {
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    use super::*;
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    #[test]
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    fn get_current() {
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        println!("current: {}", get_timezone().unwrap());
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    }
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}