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import sys
import math
import pytest
from sdl2 import endian
class TestSDLEndian(object):
__tags__ = ["sdl"]
def test_SDL_BYTEORDER(self):
if sys.byteorder == "little":
assert endian.SDL_BYTEORDER == endian.SDL_LIL_ENDIAN
else:
assert endian.SDL_BYTEORDER == endian.SDL_BIG_ENDIAN
def test_SDL_Swap16(self):
assert endian.SDL_Swap16(0xFF00) == 0x00FF
assert endian.SDL_Swap16(0x0001) == 0x0100
assert endian.SDL_Swap16(0x0032) == 0x3200
assert endian.SDL_Swap16(0x0FF0) == 0xF00F
assert endian.SDL_Swap16(0x00FF) == 0xFF00
assert endian.SDL_Swap16(0x1234) == 0x3412
if sys.byteorder == "little":
assert endian.SDL_Swap16 == endian.SDL_SwapBE16
assert endian.SDL_Swap16 != endian.SDL_SwapLE16
else:
assert endian.SDL_Swap16 != endian.SDL_SwapBE16
assert endian.SDL_Swap16 == endian.SDL_SwapLE16
def test_SDL_Swap32(self):
assert endian.SDL_Swap32(0xFF000000) == 0x000000FF
assert endian.SDL_Swap32(0x00FF0000) == 0x0000FF00
assert endian.SDL_Swap32(0x0000FF00) == 0x00FF0000
assert endian.SDL_Swap32(0x000000FF) == 0xFF000000
assert endian.SDL_Swap32(0x12345678) == 0x78563412
assert endian.SDL_Swap32(0xFF00FF00) == 0x00FF00FF
if sys.byteorder == "little":
assert endian.SDL_Swap32 == endian.SDL_SwapBE32
assert endian.SDL_Swap32 != endian.SDL_SwapLE32
else:
assert endian.SDL_Swap32 != endian.SDL_SwapBE32
assert endian.SDL_Swap32 == endian.SDL_SwapLE32
def test_SDL_Swap64(self):
assert endian.SDL_Swap64(0xFF00000000000000) == 0x00000000000000FF
assert endian.SDL_Swap64(0x00FF000000000000) == 0x000000000000FF00
assert endian.SDL_Swap64(0x0000FF0000000000) == 0x0000000000FF0000
assert endian.SDL_Swap64(0x000000FF00000000) == 0x00000000FF000000
assert endian.SDL_Swap64(0x00000000FF000000) == 0x000000FF00000000
assert endian.SDL_Swap64(0x0000000000FF0000) == 0x0000FF0000000000
assert endian.SDL_Swap64(0x000000000000FF00) == 0x00FF000000000000
assert endian.SDL_Swap64(0x00000000000000FF) == 0xFF00000000000000
assert endian.SDL_Swap64(0x0123456789ABCDEF) == 0xEFCDAB8967452301
if sys.byteorder == "little":
assert endian.SDL_Swap64 == endian.SDL_SwapBE64
assert endian.SDL_Swap64 != endian.SDL_SwapLE64
else:
assert endian.SDL_Swap64 != endian.SDL_SwapBE64
assert endian.SDL_Swap64 == endian.SDL_SwapLE64
def test_SDL_SwapFloat(self):
v = -100.0
while v < 101:
p = endian.SDL_SwapFloat(v)
assert p != v
assert endian.SDL_SwapFloat(p) == v
v += 0.1
values = (sys.float_info.epsilon,
sys.float_info.min,
sys.float_info.max,
- sys.float_info.min,
math.pi,
- math.pi
)
for v in values:
p = endian.SDL_SwapFloat(v)
assert p != v
assert endian.SDL_SwapFloat(p) == v
if sys.byteorder == "little":
assert endian.SDL_SwapFloat == endian.SDL_SwapFloatBE
assert endian.SDL_SwapFloat != endian.SDL_SwapFloatLE
else:
assert endian.SDL_SwapFloat != endian.SDL_SwapFloatBE
assert endian.SDL_SwapFloat == endian.SDL_SwapFloatLE
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