libffi/testsuite/libffi.call/cls_uchar.c

   1 /* Area:        closure_call
   2    Purpose:     Check return value uchar.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  <andreast@gcc.gnu.org> 20030828  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 static void cls_ret_uchar_fn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  11                              void* userdata __UNUSED__)
  12 {
  13   *(ffi_arg*)resp = *(unsigned char *)args[0];
  14   printf("%d: %d\n",*(unsigned char *)args[0],
  15          (int)*(ffi_arg *)(resp));
  16 }
  17 typedef unsigned char (*cls_ret_uchar)(unsigned char);
  18
  19 int main (void)
  20 {
  21   ffi_cif cif;
  22   void *code;
  23   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  24   ffi_type * cl_arg_types[2];
  25   unsigned char res;
  26
  27   cl_arg_types[0] = &ffi_type_uchar;
  28   cl_arg_types[1] = NULL;
  29
  30   /* Initialize the cif */
  31   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  32                      &ffi_type_uchar, cl_arg_types) == FFI_OK);
  33
  34   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_ret_uchar_fn, NULL, code)  == FFI_OK);
  35
  36   res = (*((cls_ret_uchar)code))(127);
  37   /* { dg-output "127: 127" } */
  38   printf("res: %d\n",res);
  39   /* { dg-output "\nres: 127" } */
  40
  41   exit(0);
  42 }