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"""
PC-BASIC - compat.python3
Python 2/Python 3 functionality
Contains lines of code from package six, which is
Copyright (c) 2010-2018 Benjamin Peterson
and released under an MIT licence https://opensource.org/licenses/MIT
"""
import sys
import os
import struct
# deal with broken pipes
def is_broken_pipe(e):
return isinstance(e, BrokenPipeError)
# strings
int2byte = struct.Struct(">B").pack
def add_str(cls):
"""Decorator to implement the correct str() function."""
try:
cls.__str__ = cls.__unicode__
except AttributeError:
pass
return cls
# unicode system interfaces
getcwdu = os.getcwd
getenvu = os.getenv
iterenvu = os.environ.keys
def setenvu(key, value):
os.environ[key] = value
# iterators
zip = zip
xrange = range
def iterchar(s):
"""Iterate over bytes, returning char."""
return (s[_i:_i+1] for _i in range(len(s)))
def iterbytes(s):
"""Iterate over bytes/bytearray/memoryview, returning int."""
return s
def iteritems(d, **kw):
return iter(d.items(**kw))
def itervalues(d, **kw):
return iter(d.values(**kw))
def iterkeys(d, **kw):
return iter(d.keys(**kw))
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