psocket 0.1.5

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![allow(missing_docs, bad_style)]

use std::time::Duration;

pub mod c;
pub mod net;

pub use self::c::{SOCKET, INVALID_SOCKET};

pub fn dur2timeout(dur: Duration) -> c::DWORD {
    // Note that a duration is a (u64, u32) (seconds, nanoseconds) pair, and the
    // timeouts in windows APIs are typically u32 milliseconds. To translate, we
    // have two pieces to take care of:
    //
    // * Nanosecond precision is rounded up
    // * Greater than u32::MAX milliseconds (50 days) is rounded up to INFINITE
    //   (never time out).
    dur.as_secs().checked_mul(1000).and_then(|ms| {
        ms.checked_add((dur.subsec_nanos() as u64) / 1_000_000)
    }).and_then(|ms| {
        ms.checked_add(if dur.subsec_nanos() % 1_000_000 > 0 {1} else {0})
    }).map(|ms| {
        if ms > <c::DWORD>::max_value() as u64 {
            c::INFINITE
        } else {
            ms as c::DWORD
        }
    }).unwrap_or(c::INFINITE)
}