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use `TIOCGWINSZ` directly from `libc`

This commit is contained in:
Niv Kaminer 2017-10-11 13:06:09 +03:00
parent 52a22ea873
commit 00f87e5ed8
1 changed files with 2 additions and 30 deletions
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32
src/sys/unix/size.rs
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@ -1,7 +1,7 @@
use std::{io, mem};
use super::cvt;
use super::libc::{c_ushort, ioctl, STDOUT_FILENO};
use super::libc::{c_ushort, ioctl, STDOUT_FILENO, TIOCGWINSZ};
#[repr(C)]
struct TermSize {
@ -10,39 +10,11 @@ struct TermSize {
_x: c_ushort,
_y: c_ushort,
}
#[cfg(target_os = "linux")]
pub const TIOCGWINSZ: usize = 0x00005413;
#[cfg(not(target_os = "linux"))]
pub const TIOCGWINSZ: usize = 0x40087468;
// Since attributes on non-item statements is not stable yet, we use a function.
#[cfg(not(target_os = "android"))]
#[cfg(not(target_os = "redox"))]
#[cfg(target_pointer_width = "64")]
#[cfg(not(target_env = "musl"))]
fn tiocgwinsz() -> u64 {
TIOCGWINSZ as u64
}
#[cfg(not(target_os = "android"))]
#[cfg(not(target_os = "redox"))]
#[cfg(target_pointer_width = "32")]
#[cfg(not(target_env = "musl"))]
fn tiocgwinsz() -> u32 {
TIOCGWINSZ as u32
}
#[cfg(any(target_env = "musl", target_os = "android"))]
fn tiocgwinsz() -> i32 {
TIOCGWINSZ as i32
}
/// Get the size of the terminal.
pub fn terminal_size() -> io::Result<(u16, u16)> {
unsafe {
let mut size: TermSize = mem::zeroed();
cvt(ioctl(STDOUT_FILENO, tiocgwinsz(), &mut size as *mut _))?;
cvt(ioctl(STDOUT_FILENO, TIOCGWINSZ, &mut size as *mut _))?;
Ok((size.col as u16, size.row as u16))
}
}