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use super::c::{ReadConsoleW, WriteConsoleW, GetConsoleMode, SetConsoleMode};
use super::c::{ERROR_ILLEGAL_CHARACTER};
use super::c::{ENABLE_ECHO_INPUT, ENABLE_EXTENDED_FLAGS};
use super::c::{ENABLE_INSERT_MODE, ENABLE_LINE_INPUT};
use super::c::{ENABLE_PROCESSED_INPUT, ENABLE_QUICK_EDIT_MODE};
use libc::{c_int, HANDLE, LPDWORD, DWORD, LPVOID};
use libc::{get_osfhandle, CloseHandle};
use libc::types::os::arch::extra::LPCVOID;
use io::{mod, IoError, IoResult, MemReader};
use iter::repeat;
use prelude::*;
use ptr;
use str::from_utf8;
fn invalid_encoding() -> IoError {
IoError {
kind: io::InvalidInput,
desc: "text was not valid unicode",
detail: None,
}
}
pub fn is_tty(fd: c_int) -> bool {
let mut out: DWORD = 0;
match unsafe { GetConsoleMode(get_osfhandle(fd) as HANDLE,
&mut out as LPDWORD) } {
0 => false,
_ => true,
}
}
pub struct TTY {
closeme: bool,
handle: HANDLE,
utf8: MemReader,
}
impl TTY {
pub fn new(fd: c_int) -> IoResult<TTY> {
if is_tty(fd) {
let closeme = match fd {
0...2 => false,
_ => true,
};
let handle = unsafe { get_osfhandle(fd) as HANDLE };
Ok(TTY {
handle: handle,
utf8: MemReader::new(Vec::new()),
closeme: closeme,
})
} else {
Err(IoError {
kind: io::MismatchedFileTypeForOperation,
desc: "invalid handle provided to function",
detail: None,
})
}
}
pub fn read(&mut self, buf: &mut [u8]) -> IoResult<uint> {
if self.utf8.eof() {
let mut utf16: Vec<u16> = repeat(0u16).take(0x1000).collect();
let mut num: DWORD = 0;
match unsafe { ReadConsoleW(self.handle,
utf16.as_mut_ptr() as LPVOID,
utf16.len() as u32,
&mut num as LPDWORD,
ptr::null_mut()) } {
0 => return Err(super::last_error()),
_ => (),
};
utf16.truncate(num as uint);
let utf8 = match String::from_utf16(utf16.as_slice()) {
Ok(utf8) => utf8.into_bytes(),
Err(..) => return Err(invalid_encoding()),
};
self.utf8 = MemReader::new(utf8);
}
Ok(self.utf8.read(buf).unwrap())
}
pub fn write(&mut self, buf: &[u8]) -> IoResult<()> {
let utf16 = match from_utf8(buf).ok() {
Some(utf8) => {
utf8.utf16_units().collect::<Vec<u16>>()
}
None => return Err(invalid_encoding()),
};
let mut num: DWORD = 0;
match unsafe { WriteConsoleW(self.handle,
utf16.as_ptr() as LPCVOID,
utf16.len() as u32,
&mut num as LPDWORD,
ptr::null_mut()) } {
0 => Err(super::last_error()),
_ => Ok(()),
}
}
pub fn set_raw(&mut self, raw: bool) -> IoResult<()> {
match unsafe { SetConsoleMode(self.handle,
match raw {
true => 0,
false => ENABLE_ECHO_INPUT | ENABLE_EXTENDED_FLAGS |
ENABLE_INSERT_MODE | ENABLE_LINE_INPUT |
ENABLE_PROCESSED_INPUT | ENABLE_QUICK_EDIT_MODE,
}) } {
0 => Err(super::last_error()),
_ => Ok(()),
}
}
pub fn get_winsize(&mut self) -> IoResult<(int, int)> {
Err(super::unimpl())
}
pub fn isatty(&self) -> bool { true }
}
impl Drop for TTY {
fn drop(&mut self) {
if self.closeme {
let _ = unsafe { CloseHandle(self.handle) };
}
}
}