use libc::{STDOUT_FILENO, STDIN_FILENO, STDERR_FILENO, c_int, c_ulong, winsize};
use std::mem::zeroed;
#[cfg(any(target_os = "linux", target_os = "android"))]
static TIOCGWINSZ: c_ulong = 0x5413;
#[cfg(any(target_os = "macos",
target_os = "ios",
target_os = "bitrig",
target_os = "dragonfly",
target_os = "freebsd",
target_os = "netbsd",
target_os = "openbsd"))]
static TIOCGWINSZ: c_ulong = 0x40087468;
#[cfg(target_os = "solaris")]
static TIOCGWINSZ: c_ulong = 0x5468;
extern "C" {
fn ioctl(fd: c_int, request: c_ulong, ...) -> c_int;
}
unsafe fn get_dimensions_any() -> winsize {
let mut window: winsize = zeroed();
let mut result = ioctl(STDOUT_FILENO, TIOCGWINSZ, &mut window);
if result == -1 {
window = zeroed();
result = ioctl(STDIN_FILENO, TIOCGWINSZ, &mut window);
if result == -1 {
window = zeroed();
result = ioctl(STDERR_FILENO, TIOCGWINSZ, &mut window);
if result == -1 {
return zeroed();
}
}
}
window
}
unsafe fn get_dimensions_out() -> winsize {
let mut window: winsize = zeroed();
let result = ioctl(STDOUT_FILENO, TIOCGWINSZ, &mut window);
if result != -1 {
return window;
}
zeroed()
}
unsafe fn get_dimensions_in() -> winsize {
let mut window: winsize = zeroed();
let result = ioctl(STDIN_FILENO, TIOCGWINSZ, &mut window);
if result != -1 {
return window;
}
zeroed()
}
unsafe fn get_dimensions_err() -> winsize {
let mut window: winsize = zeroed();
let result = ioctl(STDERR_FILENO, TIOCGWINSZ, &mut window);
if result != -1 {
return window;
}
zeroed()
}
pub fn dimensions() -> Option<(usize, usize)> {
let w = unsafe { get_dimensions_any() };
if w.ws_col == 0 || w.ws_row == 0 {
None
} else {
Some((w.ws_col as usize, w.ws_row as usize))
}
}
pub fn dimensions_stdout() -> Option<(usize, usize)> {
let w = unsafe { get_dimensions_out() };
if w.ws_col == 0 || w.ws_row == 0 {
None
} else {
Some((w.ws_col as usize, w.ws_row as usize))
}
}
pub fn dimensions_stdin() -> Option<(usize, usize)> {
let w = unsafe { get_dimensions_in() };
if w.ws_col == 0 || w.ws_row == 0 {
None
} else {
Some((w.ws_col as usize, w.ws_row as usize))
}
}
pub fn dimensions_stderr() -> Option<(usize, usize)> {
let w = unsafe { get_dimensions_err() };
if w.ws_col == 0 || w.ws_row == 0 {
None
} else {
Some((w.ws_col as usize, w.ws_row as usize))
}
}