golden hour

/lib/python2.7/site-packages/pyasn1/type

File/Folder	Size	Actions
__init__.py	59 B
__init__.pyc	143 B
__init__.pyo	143 B
base.py	10.46 KB
base.pyc	14.22 KB
base.pyo	14.22 KB
char.py	2 KB
char.pyc	3.7 KB
char.pyo	3.7 KB
constraint.py	7.11 KB
constraint.pyc	11.24 KB
constraint.pyo	11.24 KB
error.py	84 B
error.pyc	415 B
error.pyo	415 B
namedtype.py	5.59 KB
namedtype.pyc	9.62 KB
namedtype.pyo	9.62 KB
namedval.py	2.11 KB
namedval.pyc	4.02 KB
namedval.pyo	4.02 KB
tag.py	4.39 KB
tag.pyc	7.75 KB
tag.pyo	7.75 KB
tagmap.py	2.34 KB
tagmap.pyc	3.25 KB
tagmap.pyo	3.25 KB
univ.py	43.58 KB
univ.pyc	53.25 KB
univ.pyo	53.25 KB
useful.py	565 B
useful.pyc	1.13 KB
useful.pyo	1.13 KB

Edit: constraint.py

#
#   ASN.1 subtype constraints classes.
#
#   Constraints are relatively rare, but every ASN1 object
#   is doing checks all the time for whether they have any
#   constraints and whether they are applicable to the object.
#
#   What we're going to do is define objects/functions that
#   can be called unconditionally if they are present, and that
#   are simply not present if there are no constraints.
#
#   Original concept and code by Mike C. Fletcher.
#
import sys
from pyasn1.type import error

class AbstractConstraint:
    """Abstract base-class for constraint objects

Constraints should be stored in a simple sequence in the
       namespace of their client Asn1Item sub-classes.
    """
    def __init__(self, *values):
        self._valueMap = {}
        self._setValues(values)
        self.__hashedValues = None
    def __call__(self, value, idx=None):
        try:
            self._testValue(value, idx)
        except error.ValueConstraintError:
            raise error.ValueConstraintError(
               '%s failed at: \"%s\"' % (self, sys.exc_info()[1])
            )
    def __repr__(self):
        return '%s(%s)' % (
            self.__class__.__name__,
            ', '.join([repr(x) for x in self._values])
        )
    def __eq__(self, other):
        return self is other and True or self._values == other
    def __ne__(self, other): return self._values != other
    def __lt__(self, other): return self._values < other
    def __le__(self, other): return self._values <= other
    def __gt__(self, other): return self._values > other
    def __ge__(self, other): return self._values >= other
    if sys.version_info[0] <= 2:
        def __nonzero__(self): return bool(self._values)
    else:
        def __bool__(self): return bool(self._values)

def __hash__(self):
        if self.__hashedValues is None:
            self.__hashedValues = hash((self.__class__.__name__, self._values))
        return self.__hashedValues

def _setValues(self, values): self._values = values
    def _testValue(self, value, idx):
        raise error.ValueConstraintError(value)

# Constraints derivation logic
    def getValueMap(self): return self._valueMap
    def isSuperTypeOf(self, otherConstraint):
        return self in otherConstraint.getValueMap() or \
               otherConstraint is self or otherConstraint == self
    def isSubTypeOf(self, otherConstraint):
        return otherConstraint in self._valueMap or \
               otherConstraint is self or otherConstraint == self

class SingleValueConstraint(AbstractConstraint):
    """Value must be part of defined values constraint"""
    def _testValue(self, value, idx):
        # XXX index vals for performance?
        if value not in self._values:
            raise error.ValueConstraintError(value)

class ContainedSubtypeConstraint(AbstractConstraint):
    """Value must satisfy all of defined set of constraints"""
    def _testValue(self, value, idx):
        for c in self._values:
            c(value, idx)

class ValueRangeConstraint(AbstractConstraint):
    """Value must be within start and stop values (inclusive)"""
    def _testValue(self, value, idx):
        if value < self.start or value > self.stop:
            raise error.ValueConstraintError(value)

def _setValues(self, values):
        if len(values) != 2:
            raise error.PyAsn1Error(
                '%s: bad constraint values' % (self.__class__.__name__,)
                )
        self.start, self.stop = values
        if self.start > self.stop:
            raise error.PyAsn1Error(
                '%s: screwed constraint values (start > stop): %s > %s' % (
                    self.__class__.__name__,
                    self.start, self.stop
                )
            )
        AbstractConstraint._setValues(self, values)
        
class ValueSizeConstraint(ValueRangeConstraint):
    """len(value) must be within start and stop values (inclusive)"""
    def _testValue(self, value, idx):
        l = len(value)
        if l < self.start or l > self.stop:
            raise error.ValueConstraintError(value)

class PermittedAlphabetConstraint(SingleValueConstraint):
    def _setValues(self, values):
        self._values = ()
        for v in values:
            self._values = self._values + tuple(v)

def _testValue(self, value, idx):
        for v in value:
            if v not in self._values:
                raise error.ValueConstraintError(value)

# This is a bit kludgy, meaning two op modes within a single constraing
class InnerTypeConstraint(AbstractConstraint):
    """Value must satisfy type and presense constraints"""
    def _testValue(self, value, idx):
        if self.__singleTypeConstraint:
            self.__singleTypeConstraint(value)
        elif self.__multipleTypeConstraint:
            if idx not in self.__multipleTypeConstraint:
                raise error.ValueConstraintError(value)
            constraint, status = self.__multipleTypeConstraint[idx]
            if status == 'ABSENT':   # XXX presense is not checked!
                raise error.ValueConstraintError(value)
            constraint(value)

def _setValues(self, values):
        self.__multipleTypeConstraint = {}
        self.__singleTypeConstraint = None
        for v in values:
            if isinstance(v, tuple):
                self.__multipleTypeConstraint[v[0]] = v[1], v[2]
            else:
                self.__singleTypeConstraint = v
        AbstractConstraint._setValues(self, values)

# Boolean ops on constraints

class ConstraintsExclusion(AbstractConstraint):
    """Value must not fit the single constraint"""
    def _testValue(self, value, idx):
        try:
            self._values[0](value, idx)
        except error.ValueConstraintError:
            return
        else:
            raise error.ValueConstraintError(value)

def _setValues(self, values):
        if len(values) != 1:
            raise error.PyAsn1Error('Single constraint expected')
        AbstractConstraint._setValues(self, values)

class AbstractConstraintSet(AbstractConstraint):
    """Value must not satisfy the single constraint"""
    def __getitem__(self, idx): return self._values[idx]

def __add__(self, value): return self.__class__(self, value)
    def __radd__(self, value): return self.__class__(self, value)

def __len__(self): return len(self._values)

# Constraints inclusion in sets
    
    def _setValues(self, values):
        self._values = values
        for v in values:
            self._valueMap[v] = 1
            self._valueMap.update(v.getValueMap())

class ConstraintsIntersection(AbstractConstraintSet):
    """Value must satisfy all constraints"""
    def _testValue(self, value, idx):
        for v in self._values:
            v(value, idx)

class ConstraintsUnion(AbstractConstraintSet):
    """Value must satisfy at least one constraint"""
    def _testValue(self, value, idx):
        for v in self._values:
            try:
                v(value, idx)
            except error.ValueConstraintError:
                pass
            else:
                return
        raise error.ValueConstraintError(
            'all of %s failed for \"%s\"' % (self._values, value)
            )

# XXX
# add tests for type check