src/LangFeatureTesting/abc.c

   1
   2
   3 #include <stdio.h>
   4
   5 #define offsetof(v, mbr)        ((unsigned int)&((typeof(v) *)0)->mbr)
   6 #define V(v, mbr)                       ( \
   7                                                                 ( \
   8                                                                         (typeof(v) *) \
   9                                                                         ( (unsigned int)&v + offsetof(v, i) ) \
  10                                                                 )->mbr \
  11                                                         )
  12
  13 typedef struct __tag_ABC {
  14         int a, b;
  15
  16         int i;
  17
  18         int (*pfunc) (void);
  19 } ABC;
  20
  21 //_Pragma ("GCC error \"[__LINENO__] [__DATE__ __TIME__] xxxxxxxxxxx.\"");
  22 //#pragma ();
  23
  24 extern int xxx_func (void);
  25
  26 int aaa (void), abc_func1 (void);
  27
  28 int aaa (void)
  29 {
  30         return 0;
  31 }
  32
  33 int abc_func1 (void)
  34 {
  35         return 0;
  36 }
  37
  38 int xxx_func (void)
  39 {
  40         int abc_func1 (void);
  41
  42         int xxx=1;
  43         ABC var = {
  44                 .pfunc = abc_func1,
  45         };
  46         typeof(ABC) x;
  47
  48         var.i=123;
  49
  50         printf("(unsigned int)&v = %x\n", (unsigned int)&var);
  51         printf("offsetof(v, i) = %d\n", offsetof(var, i));
  52         printf("var.i = %d\n", V(var, i));
  53
  54         printf("xxx = %d\n", xxx);
  55         printf("xxx = %d\n", xxx);
  56         printf("xxx = %d\n", xxx);
  57         printf("xxx = %d\n", xxx);
  58         printf("xxx = %d\n", xxx);
  59         return 0;
  60 }
  61