Skip to main content
BRoge
BRoge
Associate
Mar 5, 2019 7:21 PM UTC
Question

Finding sizeof(structure) in Atollic TrueSTUDIO

Hello,

I am programming a SMT32 chip and I am trying to find the size of a defined structure like the code snippet below. From reading online, using sizeof() on a structure can yield different results on different IDEs. When I use sizeof(struct some_struct) in Atollic TrueSTUDIO, I get an error. What do I use to return the size of a structure in Atollic TrueSTUDIO?

struct some_struct{
UINT8 variable1;
 
UINT8 variable2
 
UINT32 variable3
 
};
 
main(void){
UINT8 strucutre_size;
 
strucutre_size=sizeof(struct some_struct);
 
}

This topic has been closed for replies.

2 replies

Tesla DeLorean
Tesla DeLorean
Guru
Mar 5, 2019 7:58 PM UTC

What errors specifically does it report. Bunch of semi-colons missing if I cut-n-paste

typedef struct _some_struct{
 UINT8 variable1;
 
 UINT8 variable2;
 
 UINT32 variable3;
 
 } some_struct;
 
int main(void)
{
 size_t structure_size;
 
 structure_size = sizeof(some_struct);
 printf("%d\n", structure_size);
 
 while(1);
}

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
Vangelis Fortounas
Vangelis Fortounas
Associate II
Mar 5, 2019 8:29 PM UTC

Hello,

You missed some semicolons inside your structure, also the types UINTx may not be defined.

This code must work in True Studio.

   struct some_struct{

   uint8_t variable1;

   uint8_t variable2;

   uint32_t variable3;

   };

   int main(void){

   uint8_t structure_size;

   structure_size=sizeof(struct some_struct);

   }

"some_struct" is 32bit aligned, so after padding the total size reported from sizeof will be 8 bytes.

consider use #pragma pack(x) directive to change the alignment. and/or reorder structure members to reduce the requiring memory or to conform to some specific structure pack format.

Terms & ConditionsAccessibility statement