struct { short x; long y; short z; }bad_struct;
struct { long y; short x; short z; }good_struct;
I would expect both structs to be 8byte in size , or atleast the same size !
but good_struct turns out to be 8bytes and bad_struct 12 .
what am I doing wrong here ?
thx !
hofrat
///////////////////////////////////////
It's general padding performed everywhere for a 32-bit m/c. Since the short
number is considered to be of 2 bytes whereas new data should start at the
next 32 bit alignment( if the data length exceeds the padding required )
hence next 2 bytes are left as padding, so the actual struct. of your
defined structutres are as follows,
struct{
short x; /* 2- bytes */
/* again 2- bytes padding */
long y; /* 4 - bytes */
short z; /* 2 - bytes */
/* again 2 - bytes padding
}bad_struct;
struct{
long y; /* 4 - bytes */
short x; /* 2 - bytes */
short z; /* 2 - bytes */
}good_struct;
anil
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This archive was generated by hypermail 2b29 : Sat Jun 30 2001 - 21:00:11 EST