/usr/include/opencascade/Standard_inverse.h is in libopencascade-foundation-dev 6.5.0.dfsg-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | #define inverse(a)\
(0 | (( a & 0x000000ff ) << 24 )\
| (( a & 0x0000ff00 ) << 8 )\
| (( a & 0x00ff0000 ) >> 8 )\
| (( a >> 24 ) & 0x000000ff ) )
|