Add more from the std

library/std/src/sys/helpers/mod.rs

@@ -1,39 +0,0 @@
-//! Small helper functions used inside `sys`.
-//!
-//! If any of these have uses outside of `sys`, please move them to a different
-//! module.
-
-#[cfg_attr(not(target_os = "linux"), allow(unused))] // Not used on all platforms.
-mod small_c_string;
-#[cfg_attr(not(target_os = "windows"), allow(unused))] // Not used on all platforms.
-mod wstr;
-
-#[cfg(test)]
-mod tests;
-
-#[cfg_attr(not(target_os = "linux"), allow(unused))] // Not used on all platforms.
-pub use small_c_string::{run_path_with_cstr, run_with_cstr};
-#[cfg_attr(not(target_os = "windows"), allow(unused))] // Not used on all platforms.
-pub use wstr::WStrUnits;
-
-/// Computes `(value*numerator)/denom` without overflow, as long as both
-/// `numerator*denom` and the overall result fit into `u64` (which is the case
-/// for our time conversions).
-#[cfg_attr(not(target_os = "windows"), allow(unused))] // Not used on all platforms.
-pub fn mul_div_u64(value: u64, numerator: u64, denom: u64) -> u64 {
-    let q = value / denom;
-    let r = value % denom;
-    // Decompose value as (value/denom*denom + value%denom),
-    // substitute into (value*numerator)/denom and simplify.
-    // r < denom, so (denom*numerator) is the upper bound of (r*numerator)
-    q * numerator + r * numerator / denom
-}
-
-#[cfg_attr(not(target_os = "linux"), allow(unused))] // Not used on all platforms.
-pub fn ignore_notfound<T>(result: crate::io::Result<T>) -> crate::io::Result<()> {
-    match result {
-        Err(err) if err.kind() == crate::io::ErrorKind::NotFound => Ok(()),
-        Ok(_) => Ok(()),
-        Err(err) => Err(err),
-    }
-}

library/std/src/sys/helpers/mod.rs

@@ -0,0 +1 @@
+/home/julien/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/helpers/mod.rs