fluidsynth/test/test_pointer_alignment.c

#include "test.h"
#include "utils/fluid_sys.h"


// test for fluid_align_ptr()
int main(void)
{
    unsigned int align;
    uintptr_t ptr, aligned_ptr;
    
    for(align = 32; align <= 4*1024u; align <<= 1)
    {
        for(ptr = 0; ptr <= (align<<10); ptr++)
        {
            char* tmp = fluid_align_ptr((char*)ptr, align);
            aligned_ptr = (uintptr_t)tmp;
            
            // pointer must be aligned properly
            TEST_ASSERT(aligned_ptr % align == 0);
            
            // aligned pointer must not be smaller than ptr
            TEST_ASSERT(aligned_ptr >= ptr);
            
            // aligned pointer must not be bigger than alignment
            TEST_ASSERT(aligned_ptr < ptr + align);
        }
    }
    
    return EXIT_SUCCESS;
}