Author: Gareth McCaughan
Date: 17:34:30 05/09/03
Go up one level in this thread
On May 09, 2003 at 10:26:41, Robert Hyatt wrote:
>On May 08, 2003 at 21:00:46, Zach Wegner wrote:
>
>>In my program, I have the move data structure:
>>typedef struct
>>{
>> union
>> {
>> struct
>> {
>> char from;
>> char to;
>> char bits;
>> char piece;
>> };
>> unsigned int move;
>> };
>> unsigned int score;
>>} SMOVE;
>>
>>Is there any specific order in which the chars are aligned into the int, or is
>>it compiler-dependent?
>>
>>Zach
>
>
>
>They have to be aligned left-to-right. IE from will be the MSbyte, piece will
>be the LSbyte.
No.
They will be stored in order of increasing address. On some
architectures this will be LSB first; on others it will be MSB
first; on some weird systems it might be something different.
There may be padding anywhere within the structure, including
between those single-byte fields. In practice, there will almost
certainly be no padding between those fields.
--
g
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