git.ozlabs.org Git - ccan/blob - ccan/tcon/test/compile_ok-value.c

   1 #include <ccan/tcon/tcon.h>
   2 #include <ccan/build_assert/build_assert.h>
   3 #include <stdlib.h>
   4 #include <stddef.h>
   5
   6 struct container {
   7         void *p;
   8 };
   9
  10 struct val_container {
  11         struct container raw;
  12         TCON(TCON_VALUE(fixed_val, 17));
  13 };
  14
  15 struct other_struct {
  16         char junk1;
  17         int x1;
  18         long junk2;
  19         char *x2;
  20         short junk3;
  21 };
  22
  23 struct offs_container {
  24         struct container raw;
  25         TCON(TCON_VALUE(off1, offsetof(struct other_struct, x1));
  26              TCON_VALUE(off2, offsetof(struct other_struct, x2)));
  27 };
  28
  29 int main(int argc, char *argv[])
  30 {
  31         struct val_container valcon;
  32         struct offs_container offscon;
  33         TCON_WRAP(struct container, TCON_VALUE(fixed_val, 17)) valconw;
  34         TCON_WRAP(struct container,
  35                   TCON_VALUE(off1, offsetof(struct other_struct, x1));
  36                   TCON_VALUE(off2, offsetof(struct other_struct, x2))) offsconw;
  37
  38         BUILD_ASSERT(tcon_value(&valcon, fixed_val) == 17);
  39         BUILD_ASSERT(tcon_value(&valconw, fixed_val) == 17);
  40
  41         BUILD_ASSERT(tcon_value(&offscon, off1)
  42                      == offsetof(struct other_struct, x1));
  43         BUILD_ASSERT(tcon_value(&offscon, off2)
  44                      == offsetof(struct other_struct, x2));
  45         BUILD_ASSERT(tcon_value(&offsconw, off1)
  46                      == offsetof(struct other_struct, x1));
  47         BUILD_ASSERT(tcon_value(&offsconw, off2)
  48                      == offsetof(struct other_struct, x2));
  49
  50         return 0;
  51 }