#include "ffitest.h"
#include "float.h"
typedef union
{
double d;
unsigned char c[sizeof (double)];
} value_type;
#define CANARY 0xba
static double dblit(double d)
{
return d;
}
int main (void)
{
ffi_cif cif;
ffi_type *args[MAX_ARGS];
void *values[MAX_ARGS];
double d;
value_type result[2];
unsigned int i;
args[0] = &ffi_type_double;
values[0] = &d;
CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
&ffi_type_double, args) == FFI_OK);
d = DBL_MIN / 2;
memset(result[1].c, CANARY, sizeof (double));
ffi_call(&cif, FFI_FN(dblit), &result[0].d, values);
CHECK(result[0].d == dblit(d));
for (i = 0; i < sizeof (double); ++i)
CHECK(result[1].c[i] == CANARY);
exit(0);
}