On 30.11.2016 15:32, Paul "LeoNerd" Evans wrote:
On Wed, 30 Nov 2016 18:18:11 +0530
Senthil Kumar Selvaraj <senthil_kumar.selva...@atmel.com> wrote:
Diogo Martins Silva writes:
Hello all.
The avr-gcc wiki (https://gcc.gnu.org/wiki/avr-gcc) lists 24 bits
(u)ints as an extension since version 4.7. How do I use them?
Use __uint24 as the type. Like so
$ cat test.c
volatile __uint24 x;
int main() {
x++;
x--;
}
Is it possible to get that added to <stdint.h> as the expected names
int24_t
uint24_t
?
The C99 and later standards don't supply these types or reserve these
identifiers. Since C99, "int8_t" is an identifier that resides in the
namespace of the implementation, whereas "int24_t" is still in the
namespace of the application. Hence, for the new 3-byte types names
were chosen that are in the namespace of the implementation, i.e.
reserved identifiers which start with "__" (__int24 and __uint24).
If you like you can define such types in your application, but they
should not go into any standard header.
Johann
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