Viewing file:  20051113-1.c (1.47 KB) -rw-r--r--
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extern void *malloc(__SIZE_TYPE__);
extern void *memset(void *, int, __SIZE_TYPE__);
typedef struct
{
short a;
unsigned short b;
unsigned short c;
unsigned long long Count;
long long Count2;
} __attribute__((packed)) Struct1;
typedef struct
{
short a;
unsigned short b;
unsigned short c;
unsigned long long d;
long long e;
long long f;
} __attribute__((packed)) Struct2;
typedef union
{
Struct1 a;
Struct2 b;
} Union;
typedef struct
{
int Count;
Union List[0];
} __attribute__((packed)) Struct3;
unsigned long long Sum (Struct3 *instrs) __attribute__((noinline));
unsigned long long Sum (Struct3 *instrs)
{
unsigned long long count = 0;
int i;
for (i = 0; i < instrs->Count; i++) {
count += instrs->List[i].a.Count;
}
return count;
}
long long Sum2 (Struct3 *instrs) __attribute__((noinline));
long long Sum2 (Struct3 *instrs)
{
long long count = 0;
int i;
for (i = 0; i < instrs->Count; i++) {
count += instrs->List[i].a.Count2;
}
return count;
}
main() {
Struct3 *p = malloc (sizeof (int) + 3 * sizeof(Union));
memset(p, 0, sizeof(int) + 3*sizeof(Union));
p->Count = 3;
p->List[0].a.Count = 555;
p->List[1].a.Count = 999;
p->List[2].a.Count = 0x101010101ULL;
p->List[0].a.Count2 = 555;
p->List[1].a.Count2 = 999;
p->List[2].a.Count2 = 0x101010101LL;
if (Sum(p) != 555 + 999 + 0x101010101ULL)
abort();
if (Sum2(p) != 555 + 999 + 0x101010101LL)
abort();
return 0;
}
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