Does anyone know how should ASF_OBJECT_GUID_TEST be defined to avoid compilation error in the line marked below, or where I can find more information about it?
#define ASF_OBJECT_GUID_TEST {(char)0x75, (char)0xB2, (char)0x00}
void testFunction(char * testChar)
{
}
int main(int argc, char * argv[])
{
char test[] = ASF_OBJECT_GUID_TEST;
testFunction(test);
testFunction(ASF_OBJECT_GUID_TEST); // <- fails to compile this line of code
return 0;
}
{(char)0x75, (char)0xB2, (char)0x00}
is an initializer list and is not itself an array (or a pointer) in C89.
You instead could use:
#define ASF_OBJECT_GUID_TEST "\x75\xB2"
you want to cast the ASF_OBJECT_GUID_TEST, i.e
testFunction((char[])ASF_OBJECT_GUID_TEST)
or
#define ASF_OBJECT_GUID_TEST (char[]){(char)...}
(char) casts inside the curly braces are not needed of course (you probably know this, so the comment is mostly for the OP). Also, this is C99 only.Thanks. That was exactly what I was looking for.
Supposed I have defined many string literals which have 8 characters, and each 2 of them make actually the value of a byte. Is there a way to create a macro that would modify those string literals by adding a "\x" between every couple of characters like the following?
#define TEST SOME_MACRO("33698149")
Where TEST would be "\x33\x69\x81\x49"
#define ASF_OBJECT_GUID_TEST "\x75\xB2".