#!/usr/bin/python -tt
# vim:ts=8:sts=4:sw=4:et:

from subprocess import *
import sys 
import os, select

special = {
    # trees: Clubs looks more like a tree than the +- symbol
    '\xf1': u'\u2663',   # tree (clubs)

    # fountains: This is supposed to be just the top half of the integral
    # symbol, but my fonts don't have that, so we'll use the whole symbol
    '\xf4': u'\u222b',

    # Spiderweb: sun symbol
    '\xe2': u'\u263c',

    # Special cases for rogue levels
    '\x01': u'\u263a', # human, elf - smiley
    '\x04': u'\u2666', # trap, web - dimaond

    # These are supposed to be used on rogue levels, but don't appear
    # to be used when I try them...
    #'\x05': u'\u2663', # food - clubs
    #'\x0c': u'\u2640', # amulet - female
    #'\x0e': u'\u266b', # scroll - note
    #'\x0f': u'\u263c', # gold, gems - sun
    #'\x18': u'\u2191', # weapon - up arrow
}

if len(sys.argv) < 2:
    print "usage: ibmfilter [command]"
    print "Runs command in a subshell and translates its output from ibm473 codepage to UTF-8."
    sys.exit(0)

handle = Popen(sys.argv[1:], stdout=PIPE, bufsize=1)
buf = handle.stdout.read(1)
while buf != '':
    if buf in special:
        out = special[buf]
    else:
        out = buf.decode('ibm437')
    writeable = select.select([], [sys.stdout], [], 5)[1]
    if not writeable:
        os.kill(handle.pid)
        os.system('reset')
        raise Exception("Timed out while waiting for stdout to be writeable...")
    sys.stdout.write(out.encode('UTF-8'))
    buf = handle.stdout.read(1)

handle.wait()