在OS X and iOS中，整数数据类型的大小和对齐

Integer data type

ILP32 size

ILP32 alignment

LP64 size

LP64 alignment

char

1 byte

1 byte

1 byte

1 byte

BOOL, bool

1 byte

1 byte

1 byte

1 byte

short

2 bytes

2 bytes

2 bytes

2 bytes

int

4 bytes

4 bytes

4 bytes

4 bytes

long

4 bytes

4 bytes

8 bytes

8 bytes

long long

8 bytes

4 bytes

8 bytes

8 bytes

pointer

4 bytes

4 bytes

8 bytes

8 bytes

size_t

4 bytes

4 bytes

8 bytes

8 bytes

time_t

4 bytes

4 bytes

8 bytes

8 bytes

NSInteger

4 bytes

4 bytes

8 bytes

8 bytes

CFIndex

4 bytes

4 bytes

8 bytes

8 bytes

fpos_t

8 bytes

4 bytes

8 bytes

8 bytes

off_t

8 bytes

4 bytes

8 bytes

8 bytes