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|
import sys
import array
import ctypes
import struct
import pytest
from sdl2.ext import array as sdlextarray
BIG_ENDIAN = sys.byteorder == "big"
singlebyteseq = [x for x in range(0x100)]
doublebyteseq = [x for x in range(0x10000)]
quadbyteseq = [0x00000000,
0x000000FF,
0x0000FF00,
0x0000FFFF,
0x00FF0000,
0x00FF00FF,
0x00FFFF00,
0x00FFFFFF,
0xFF000000,
0xFF0000FF,
0xFF00FF00,
0xFFFF0000,
0xFFFF00FF,
0xFFFFFF00,
0xFFFFFFFF
]
singlebytebuf = array.array("B", singlebyteseq)
doublebytebuf = array.array("H", doublebyteseq)
quadbytebuf = array.array("I", quadbyteseq)
USHORT_SIZE = struct.calcsize("H")
UINT_SIZE = struct.calcsize("I")
UBYTE_SIZE = struct.calcsize("B")
def create_16b(seq, offset):
if sys.byteorder == 'little':
return (seq[offset] | seq[offset + 1] << 8)
else:
return (seq[offset] << 8 | seq[offset + 1])
def create_32b(seq, size, offset):
if sys.byteorder == 'little':
if size == 1:
return (seq[offset] |
seq[offset + 1] << 8 |
seq[offset + 2] << 16 |
seq[offset + 3] << 24)
elif size == 2:
return (seq[offset] | seq[offset + 1] << 16)
else:
if size == 1:
return (seq[offset] << 24 |
seq[offset + 1] << 16 |
seq[offset + 2] << 8 |
seq[offset + 3])
elif size == 2:
return (seq[offset] << 16 | seq[offset + 1])
def create_64b(seq, size, offset):
if sys.byteorder == 'little':
if size == 1:
return (seq[offset] |
seq[offset + 1] << 8 |
seq[offset + 2] << 16 |
seq[offset + 3] << 24 |
seq[offset + 4] << 32 |
seq[offset + 5] << 40 |
seq[offset + 6] << 48 |
seq[offset + 7] << 56)
elif size == 2:
return (seq[offset] |
seq[offset + 1] << 16 |
seq[offset + 2] << 32 |
seq[offset + 3] << 48)
elif size == 4:
return (seq[offset] | seq[offset + 1] << 32)
else:
if size == 1:
return (seq[offset] << 56 |
seq[offset + 1] << 48 |
seq[offset + 2] << 40 |
seq[offset + 3] << 32 |
seq[offset + 4] << 24 |
seq[offset + 5] << 16 |
seq[offset + 6] << 8 |
seq[offset + 7])
elif size == 2:
return (seq[offset] << 48 |
seq[offset + 1] << 32 |
seq[offset + 2] << 16 |
seq[offset + 3])
elif size == 4:
return (seq[offset] << 32 | seq[offset + 1])
def lobyte16(val):
return val & 0x00FF
def hibyte16(val):
return val >> 8 & 0x00FF
def lobytes32(val):
return val & 0x0000FFFF
def hibytes32(val):
return val >> 16 & 0x0000FFFF
def ltrbyte32(val, pos):
if sys.byteorder == 'little':
if pos == 0:
return val & 0x000000FF
elif pos == 1:
return (val & 0x0000FF00) >> 8
elif pos == 2:
return (val & 0x00FF0000) >> 16
elif pos == 3:
return (val & 0xFF000000) >> 24
else:
raise IndexError("invalid position")
else:
if pos == 3:
return (val & 0x000000FF)
elif pos == 2:
return (val & 0x0000FF00) >> 8
elif pos == 1:
return (val & 0x00FF0000) >> 16
elif pos == 0:
return (val & 0xFF000000) >> 24
else:
raise IndexError("invalid position")
class TestSDL2ExtArray(object):
__tags__ = ["sdl2ext"]
def test_to_ctypes(self):
for seq, dtype in ((singlebyteseq, ctypes.c_ubyte),
(singlebytebuf, ctypes.c_ubyte),
(doublebyteseq, ctypes.c_ushort),
(doublebytebuf, ctypes.c_ushort),
(quadbyteseq, ctypes.c_uint),
(quadbytebuf, ctypes.c_uint)):
bytebuf, size = sdlextarray.to_ctypes(seq, dtype)
assert size == len(seq)
for index, x in enumerate(bytebuf):
assert x == seq[index]
def test_CTypesView__singlebytes(self):
buf1 = sdlextarray.CTypesView(singlebyteseq, docopy=True)
buf2 = sdlextarray.CTypesView(singlebytebuf, docopy=False)
for singlebytes, shared in ((buf1, False), (buf2, True)):
assert isinstance(singlebytes, sdlextarray.CTypesView)
assert singlebytes.is_shared == shared
assert singlebytes.bytesize == len(singlebyteseq)
for index, val in enumerate(singlebytes.to_bytes()):
assert val == singlebyteseq[index]
offset = 0
for val in singlebytes.to_uint16():
seqval = create_16b(singlebyteseq, offset)
assert val == seqval
offset += 2
offset = 0
for val in singlebytes.to_uint32():
seqval = create_32b(singlebyteseq, 1, offset)
assert val == seqval
offset += 4
offset = 0
for val in singlebytes.to_uint64():
seqval = create_64b(singlebyteseq, 1, offset)
assert val == seqval
offset += 8
def test_CTypesView__doublebytes(self):
buf1 = sdlextarray.CTypesView(doublebyteseq, USHORT_SIZE, docopy=True)
buf2 = sdlextarray.CTypesView(doublebytebuf, USHORT_SIZE, docopy=False)
for singlebytes, shared in ((buf1, False), (buf2, True)):
assert isinstance(singlebytes, sdlextarray.CTypesView)
assert singlebytes.is_shared == shared
assert singlebytes.bytesize == len(doublebyteseq) * 2
offset = 0
cnt = 0
for val in singlebytes.to_bytes():
hi = hibyte16(doublebyteseq[offset])
lo = lobyte16(doublebyteseq[offset])
if cnt > 0:
assert val == (lo if BIG_ENDIAN else hi)
cnt = 0
offset += 1
else:
assert val == (hi if BIG_ENDIAN else lo)
cnt += 1
offset = 0
for val in singlebytes.to_uint16():
assert val == doublebyteseq[offset]
offset += 1
offset = 0
for val in singlebytes.to_uint32():
seqval = create_32b(doublebyteseq, 2, offset)
assert val == seqval
offset += 2
offset = 0
for val in singlebytes.to_uint64():
seqval = create_64b(doublebyteseq, 2, offset)
assert val == seqval
offset += 4
def test_CTypesView__quadbytes(self):
buf1 = sdlextarray.CTypesView(quadbyteseq, UINT_SIZE, docopy=True)
buf2 = sdlextarray.CTypesView(quadbytebuf, UINT_SIZE, docopy=False)
for singlebytes, shared in ((buf1, False), (buf2, True)):
assert isinstance(singlebytes, sdlextarray.CTypesView)
assert singlebytes.is_shared == shared
assert singlebytes.bytesize == len(quadbyteseq) * 4
offset = 0
cnt = 0
for val in singlebytes.to_bytes():
assert val == ltrbyte32(quadbyteseq[offset], cnt)
if cnt == 3:
offset += 1
cnt = 0
else:
cnt += 1
cnt = 0
offset = 0
for val in singlebytes.to_uint16():
hi = hibytes32(quadbyteseq[offset])
lo = lobytes32(quadbyteseq[offset])
if cnt > 0:
assert val == (lo if BIG_ENDIAN else hi)
cnt = 0
offset += 1
else:
assert val == (hi if BIG_ENDIAN else lo)
cnt += 1
offset = 0
for val in singlebytes.to_uint32():
assert val == quadbyteseq[offset]
offset += 1
offset = 0
for val in singlebytes.to_uint64():
seqval = create_64b(quadbyteseq, 4, offset)
assert val == seqval
offset += 2
def test_CTypesView__repr__(self):
seqs = ((singlebyteseq, UBYTE_SIZE, 1, False),
(doublebyteseq, USHORT_SIZE, 2, False),
(quadbyteseq, UINT_SIZE, 4, False),
(singlebytebuf, UBYTE_SIZE, 1, True),
(doublebytebuf, USHORT_SIZE, 2, True),
(quadbytebuf, UINT_SIZE, 4, True),
)
for seq, size, factor, shared in seqs:
buf = sdlextarray.CTypesView(seq, size, not shared)
otype = type(seq).__name__
if not shared:
otype = 'array'
text = "CTypesView(type=%s, bytesize=%d, shared=%s)" % \
(otype, len(seq) * factor, shared)
assert text == repr(buf)
def test_MemoryView(self):
with pytest.raises(TypeError):
sdlextarray.MemoryView(5, 1, (1,))
with pytest.raises(TypeError):
sdlextarray.MemoryView(None, 1, (1,))
source = "Example buffer"
view = sdlextarray.MemoryView(source, 1, (len(source),))
for index, val in enumerate(view):
assert val == source[index]
view = sdlextarray.MemoryView(source, 1, (2, 7))
word1 = view[0] # "Example"
word2 = view[1] # " buffer"
assert len(view) == 2
assert len(word1) == 7
assert len(word2) == 7
for index, val in enumerate(word1):
assert val == source[index]
for index, val in enumerate(word2):
assert val == source[index + 7]
# TODO: more tests
def test_MemoryView_ndim_strides(self):
source = "Example buffer"
view = sdlextarray.MemoryView(source, 1, (len(source),))
assert view.ndim == 1
assert view.strides == (len(source),)
view = sdlextarray.MemoryView(source, 1, (2, 7))
assert view.ndim == 2
assert view.strides == (2, 7)
view = sdlextarray.MemoryView(source, 1, (7, 2))
assert view.ndim == 2
assert view.strides == (7, 2)
view = sdlextarray.MemoryView(source, 1, (2, 2, 2))
assert view.ndim == 3
assert view.strides == (2, 2, 2)
def test_MemoryView_itemsize(self):
source = "Example buffer"
view = sdlextarray.MemoryView(source, 1, (len(source),))
assert view.itemsize == 1
view = sdlextarray.MemoryView(source, 7, (1, 7))
assert view.itemsize == 7
def test_MemoryView_size(self):
source = "Example buffer"
view = sdlextarray.MemoryView(source, 1, (len(source),))
assert view.size == len(source)
view = sdlextarray.MemoryView(source, 7, (1, 7))
assert view.size == len(source)
def test_MemoryView_source(self):
source = "Example buffer"
view = sdlextarray.MemoryView(source, 1, (len(source),))
assert view.source == source
def test_to_tuple(self):
ar = (ctypes.c_int * 20)()
for i in range(20):
ar[i] = i
vtuple = sdlextarray.to_tuple(ar)
assert isinstance(vtuple, tuple)
for index, value in enumerate(vtuple):
assert value == ar[index]
def test_to_list(self):
ar = (ctypes.c_int * 20)()
for i in range(20):
ar[i] = i
vlist = sdlextarray.to_list(ar)
assert isinstance(vlist, list)
for index, value in enumerate(vlist):
assert value == ar[index]
def test_create_array(self):
barr = bytes(bytearray(singlebyteseq))
for i in (1, 2, 4, 8):
parr = sdlextarray.create_array(barr, i)
assert isinstance(parr, array.array)
if i == 1:
assert parr[0] == 0x0
elif i == 2:
assert parr[0] == struct.unpack("=H", barr[0:2])[0]
elif i == 4:
assert parr[0] == struct.unpack("=I", barr[0:4])[0]
for i in (0, 3, 5, 6, 7, 9, 10, 12, "test", self):
with pytest.raises(TypeError):
sdlextarray.create_array(barr, i)
|
