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#include <ccan/alignof/alignof.h>
#include <stdlib.h>
#include <stddef.h>
#include <ccan/tap/tap.h>
/* Alignment is remarkably difficult to test. The rules may be more
* complex than ALIGNOF() can know: eg. on i386 __alignof__(double) == 8, but
* __alignof__(struct containing double) == 4.
*
* Technically, we can only test that we give *at least* the alignment which
* naturally occurs, and that accesses work.
*
* For the moment, we work around double. */
struct lots_of_types
{
char c;
short s;
char c2;
int i;
char c3;
float f;
char c4;
double d;
char c5;
};
int main(int argc, char *argv[])
{
struct lots_of_types lots_of_types, *lp = malloc(sizeof(*lp));
char c;
short s;
char c2;
int i;
char c3;
float f;
char c4;
double d;
/* Make sure we use all the variables. */
c = c2 = c3 = c4 = 0;
plan_tests(15);
ok1((unsigned long)&c % ALIGNOF(char) == 0);
ok1((unsigned long)&s % ALIGNOF(short) == 0);
ok1((unsigned long)&i % ALIGNOF(int) == 0);
ok1((unsigned long)&f % ALIGNOF(float) == 0);
ok1((unsigned long)&d % ALIGNOF(double) == 0);
ok1((unsigned long)&lots_of_types.c % ALIGNOF(char) == 0);
ok1((unsigned long)&lots_of_types.s % ALIGNOF(short) == 0);
ok1((unsigned long)&lots_of_types.i % ALIGNOF(int) == 0);
ok1((unsigned long)&lots_of_types.f % ALIGNOF(float) == 0);
ok1(offsetof(struct lots_of_types, d) % ALIGNOF(double) == 0);
ok1((unsigned long)&lp->c % ALIGNOF(char) == 0);
ok1((unsigned long)&lp->s % ALIGNOF(short) == 0);
ok1((unsigned long)&lp->i % ALIGNOF(int) == 0);
ok1((unsigned long)&lp->f % ALIGNOF(float) == 0);
ok1((unsigned long)&lp->d % ALIGNOF(double) == 0);
exit(exit_status());
}
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