malloc/alignment/alignment.c


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#include "alignment.h"

size_t align(size_t size)
{
    size_t padding = size % sizeof(long double);
    if (padding)
        padding = sizeof(long double) - padding;
    size_t res;
    if (__builtin_uaddl_overflow(size, padding, &res))
        return 0;
    return res;
}