# Copyright (c) 2009 Tim Freeman
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# (This is the standard MIT License, copied from
# http://www.opensource.org/licenses/mit-license.php on 24 Apr 2007.)
from turing_tape import turing_tape
from interleave import interleave_as
from compile_and_run import compile_and_run
import compile

# The format is defined so that if we feed it abcd(binary) then the
# correct output is 0abcd(octal).  This is a pun, not a coincidence.
# 0456 interpreted as 10 bits = 0b0100101110.
assert compile_and_run(absyn=interleave_as, inputsize=10, inputtape=0456,
                      steps=1000) == turing_tape(length=30, bits=0100101110)

interleave_prog = compile.turing_compile(interleave_as).program

# We won't be using blind search to guess any Turing machine programs
# that explain videos, since this simple program is more than 1E138.
# Figure 1e12 neurons per human, 1e2 cycles per second per neuron, 1e6
# seconds per year, so we have 1e20 cycles per man year, so the number
# below is 1e118 man years.  Figure 1e10 people; then you have 1e108
# years of thought of the present population of humans.  Our starting
# number is so big that if you divide it by other known-big numbers,
# it's still big, and this is just for a Turing machine program that
# does a simple computation.
assert pow(10,138) < interleave_prog