Author: Robert Hyatt
Date: 20:18:50 05/09/03
Go up one level in this thread
On May 09, 2003 at 20:34:30, Gareth McCaughan wrote:
>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.
left-to-right means "ascending address order"...
>
>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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