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# coding: utf-8
from __future__ import print_function
# partially from package six by Benjamin Peterson
import sys
import os
import types
try:
from ruamel.ordereddict import ordereddict # type: ignore
except:
try:
from collections import OrderedDict
except ImportError:
from orderddict import OrderedDict # type: ignore
# to get the right name import ... as ordereddict doesn't do that
class ordereddict(OrderedDict): # type: ignore
if not hasattr(OrderedDict, 'insert'):
def insert(self, pos, key, value):
if pos >= len(self):
self[key] = value
return
od = ordereddict()
od.update(self)
for k in od:
del self[k]
for index, old_key in enumerate(od):
if pos == index:
self[key] = value
self[old_key] = od[old_key]
PY2 = sys.version_info[0] == 2
PY3 = sys.version_info[0] == 3
if PY3:
def utf8(s):
return s
def to_str(s):
return s
def to_unicode(s):
return s
else:
def utf8(s):
return s.encode('utf-8')
def to_str(s):
return str(s)
def to_unicode(s):
return unicode(s)
if PY3:
string_types = str,
integer_types = int,
class_types = type,
text_type = str
binary_type = bytes
MAXSIZE = sys.maxsize
unichr = chr
import io
StringIO = io.StringIO
BytesIO = io.BytesIO
else:
string_types = basestring,
integer_types = (int, long)
class_types = (type, types.ClassType)
text_type = unicode
binary_type = str
# to allow importing
unichr = unichr # type: ignore
from StringIO import StringIO as _StringIO
StringIO = _StringIO
import cStringIO
BytesIO = cStringIO.StringIO
if PY3:
builtins_module = 'builtins'
else:
builtins_module = '__builtin__'
def with_metaclass(meta, *bases):
"""Create a base class with a metaclass."""
return meta("NewBase", bases, {})
DBG_TOKEN = 1
DBG_EVENT = 2
DBG_NODE = 4
_debug = None
if _debug:
class ObjectCounter(object):
def __init__(self):
self.map = {}
def __call__(self, k):
self.map[k] = self.map.get(k, 0) + 1
def dump(self):
for k in sorted(self.map):
print(k, '->', self.map[k])
object_counter = ObjectCounter()
# used from yaml util when testing
def dbg(val=None):
global _debug
if _debug is None:
# set to true or false
_debug = os.environ.get('YAMLDEBUG')
if _debug is None:
_debug = 0
else:
_debug = int(_debug)
if val is None:
return _debug
return _debug & val
def nprint(*args, **kw):
if dbg:
print(*args, **kw)
# char checkers following production rules
def check_namespace_char(ch):
if u'\x21' <= ch <= u'\x7E': # ! to ~
return True
if u'\xA0' <= ch <= u'\xD7FF':
return True
if (u'\xE000' <= ch <= u'\xFFFD') and ch != u'\xFEFF': # excl. byte order mark
return True
if u'\x10000' <= ch <= u'\x10FFFF':
return True
return False
def check_anchorname_char(ch):
if ch in u',[]{}':
return False
return check_namespace_char(ch)
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