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# mode: run
# NOTE: Py2.6+ only
cimport cython
cpdef bytearray coerce_to_charptr(char* b):
"""
>>> b = bytearray(b'abc')
>>> coerced = coerce_to_charptr(b)
>>> coerced == b or (coerced, b)
True
>>> isinstance(coerced, bytearray) or type(coerced)
True
"""
return b
def coerce_to_charptrs(bytearray b):
"""
>>> b = bytearray(b'abc')
>>> coerce_to_charptrs(b)
True
"""
cdef char* cs = b
cdef unsigned char* ucs = b
cdef signed char* scs = b
return b == <bytearray>cs == <bytearray> ucs == <bytearray>scs
cpdef bytearray coerce_charptr_slice(char* b):
"""
>>> b = bytearray(b'abc')
>>> coerced = coerce_charptr_slice(b)
>>> coerced == b[:2] or (coerced, b)
True
>>> isinstance(coerced, bytearray) or type(coerced)
True
"""
return b[:2]
def infer_concatenation_types(bytearray b):
"""
>>> b = bytearray(b'a\\xFEc')
>>> b2, c, d, e, tb, tc, td, te = infer_concatenation_types(b)
>>> tb, tc, td, te
('bytearray object', 'bytearray object', 'bytearray object', 'bytearray object')
>>> b2, c, d, e
(bytearray(b'a\\xfec'), bytearray(b'a\\xfeca\\xfec'), bytearray(b'a\\xfeca\\xfec'), bytearray(b'a\\xfeca\\xfec'))
"""
c = b[:]
c += b[:]
d = b[:]
d *= 2
e = b + b
return b, c, d, e, cython.typeof(b), cython.typeof(c), cython.typeof(d), cython.typeof(e)
def infer_index_types(bytearray b):
"""
>>> b = bytearray(b'a\\xFEc')
>>> print(infer_index_types(b))
(254, 254, 254, 'unsigned char', 'unsigned char', 'unsigned char', 'int')
"""
c = b[1]
with cython.wraparound(False):
d = b[1]
with cython.boundscheck(False):
e = b[1]
return c, d, e, cython.typeof(c), cython.typeof(d), cython.typeof(e), cython.typeof(b[1])
def infer_slice_types(bytearray b):
"""
>>> b = bytearray(b'abc')
>>> print(infer_slice_types(b))
(bytearray(b'bc'), bytearray(b'bc'), bytearray(b'bc'), 'bytearray object', 'bytearray object', 'bytearray object', 'bytearray object')
"""
c = b[1:]
with cython.boundscheck(False):
d = b[1:]
with cython.boundscheck(False), cython.wraparound(False):
e = b[1:]
return c, d, e, cython.typeof(c), cython.typeof(d), cython.typeof(e), cython.typeof(b[1:])
def assign_to_index(bytearray b, value):
"""
>>> b = bytearray(b'0abcdefg')
>>> assign_to_index(b, 1)
bytearray(b'xyzee\\x01h')
>>> b
bytearray(b'xyzee\\x01h')
>>> assign_to_index(bytearray(b'0ABCDEFG'), 40)
bytearray(b'xyzEE(o')
>>> assign_to_index(bytearray(b'0abcdefg'), -1)
Traceback (most recent call last):
OverflowError: can't convert negative value to unsigned char
>>> assign_to_index(bytearray(b'0abcdef\\x00'), 255)
bytearray(b'xyzee\\xff\\xff')
>>> assign_to_index(bytearray(b'0abcdef\\x01'), 255)
Traceback (most recent call last):
OverflowError: value too large to convert to unsigned char
>>> assign_to_index(bytearray(b'0abcdef\\x00'), 256)
Traceback (most recent call last):
OverflowError: value too large to convert to unsigned char
"""
b[1] = 'x'
b[2] = b'y'
b[3] = c'z'
b[4] += 1
b[5] |= 1
b[6] = value
b[7] += value
del b[0]
try:
b[7] = 1
except IndexError:
pass
else:
assert False, "IndexError not raised"
try:
b[int(str(len(b)))] = 1 # test non-int-index assignment
except IndexError:
pass
else:
assert False, "IndexError not raised"
return b
def check_bounds(int cvalue):
"""
>>> check_bounds(0)
0
>>> check_bounds(255)
255
>>> check_bounds(256)
Traceback (most recent call last):
ValueError: byte must be in range(0, 256)
>>> check_bounds(-1)
Traceback (most recent call last):
ValueError: byte must be in range(0, 256)
"""
b = bytearray(b'x')
try:
b[0] = 256
except ValueError:
pass
else:
assert False, "ValueError not raised"
try:
b[0] = -1
except ValueError:
pass
else:
assert False, "ValueError not raised"
b[0] = cvalue
return b[0]
def nogil_assignment(bytearray x, int value):
"""
>>> b = bytearray(b'abc')
>>> nogil_assignment(b, ord('y'))
>>> b
bytearray(b'xyc')
"""
with nogil:
x[0] = 'x'
x[1] = value
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