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Simplify joystick hat value assertions

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This commit is contained in:
Camilla Löwy 2023-12-05 22:14:53 +01:00
parent 52405a9d59
commit 0ede5f58c6
1 changed files with 4 additions and 3 deletions
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7
src/input.c
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@ -462,10 +462,11 @@ void _glfwInputJoystickHat(_GLFWjoystick* js, int hat, char value)
assert(hat >= 0); assert(hat >= 0);
assert(hat < js->hatCount); assert(hat < js->hatCount);
// Valid hat values only use the least significant nibble and have at most two bits // Valid hat values only use the least significant nibble
// set, which can be considered adjacent plus an arbitrary rotation within the nibble
assert((value & 0xf0) == 0); assert((value & 0xf0) == 0);
assert((value & ((value << 2) | (value >> 2))) == 0); // Valid hat values do not have both bits of an axis set
assert((value & GLFW_HAT_LEFT) == 0 || (value & GLFW_HAT_RIGHT) == 0);
assert((value & GLFW_HAT_UP) == 0 || (value & GLFW_HAT_DOWN) == 0);
base = js->buttonCount + hat * 4; base = js->buttonCount + hat * 4;