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* [Bug c/31670] New: Error calculating size of structs
@ 2007-04-23 18:26 padrinator at gmail dot com
2007-04-23 18:33 ` [Bug c/31670] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: padrinator at gmail dot com @ 2007-04-23 18:26 UTC (permalink / raw)
To: gcc-bugs
#include <stdio.h>
typedef struct{
char data[261];
int n;
} packet;
int main(int argc, char *argv[]){
packet p;
//It should print packet=265... it prints packet=268
printf("packet = %d\n", sizeof(packet));
//It should print p=265... it prints p=268
printf("p = %d\n", sizeof(p));
//It should print p.n=4... OK
printf("p.n = %d\n", sizeof(p.n));
//It should print p.data=261... OK
printf("p.data = %d\n", sizeof(p.data));
return 0;
}
--
Summary: Error calculating size of structs
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: padrinator at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31670
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/31670] Error calculating size of structs
2007-04-23 18:26 [Bug c/31670] New: Error calculating size of structs padrinator at gmail dot com
@ 2007-04-23 18:33 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2007-04-23 18:33 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2007-04-23 19:32 -------
Learn about alignment when doing struct layout. Basically you want to use the
attribute packed to get the sizes you want.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31670
^ permalink raw reply [flat|nested] 2+ messages in thread
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2007-04-23 18:26 [Bug c/31670] New: Error calculating size of structs padrinator at gmail dot com
2007-04-23 18:33 ` [Bug c/31670] " pinskia at gcc dot gnu dot org
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