"""Terminal utilities."""

# Author: Steen Lumholt.

from termios import *

__all__ = ["setraw", "setcbreak"]

# Indexes for termios list.
IFLAG = 0
OFLAG = 1
CFLAG = 2
LFLAG = 3
ISPEED = 4
OSPEED = 5
CC = 6

def setraw(fd, when=TCSAFLUSH):
"""Put terminal into a raw mode."""
mode = tcgetattr(fd)
mode[IFLAG] = mode[IFLAG] & ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON)
mode[OFLAG] = mode[OFLAG] & ~(OPOST)
mode[CFLAG] = mode[CFLAG] & ~(CSIZE | PARENB)
mode[CFLAG] = mode[CFLAG] | CS8
mode[LFLAG] = mode[LFLAG] & ~(ECHO | ICANON | IEXTEN | ISIG)
mode[CC][VMIN] = 1
mode[CC][VTIME] = 0
tcsetattr(fd, when, mode)

def setcbreak(fd, when=TCSAFLUSH):
"""Put terminal into a cbreak mode."""
mode = tcgetattr(fd)
mode[LFLAG] = mode[LFLAG] & ~(ECHO | ICANON)
mode[CC][VMIN] = 1
mode[CC][VTIME] = 0
tcsetattr(fd, when, mode)