libffi/testsuite/libffi.call/cls_double_va.c

   1 /* Area:                ffi_call, closure_call
   2    Purpose:             Test doubles passed in variable argument lists.
   3    Limitations: none.
   4    PR:                  none.
   5    Originator:  Blake Chaffin 6/6/2007   */
   6
   7 /* { dg-do run { xfail strongarm*-*-* xscale*-*-* } } */
   8 /* { dg-output "" { xfail avr32*-*-* } } */
   9 #include "ffitest.h"
  10
  11 static void
  12 cls_double_va_fn(ffi_cif* cif __UNUSED__, void* resp,
  13                  void** args, void* userdata __UNUSED__)
  14 {
  15         char*   format          = *(char**)args[0];
  16         double  doubleValue     = *(double*)args[1];
  17
  18         *(ffi_arg*)resp = printf(format, doubleValue);
  19 }
  20
  21 int main (void)
  22 {
  23         ffi_cif cif;
  24         void *code;
  25         ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  26         void* args[3];
  27         ffi_type* arg_types[3];
  28
  29         char*   format          = "%.1f\n";
  30         double  doubleArg       = 7;
  31         ffi_arg res                     = 0;
  32
  33         arg_types[0] = &ffi_type_pointer;
  34         arg_types[1] = &ffi_type_double;
  35         arg_types[2] = NULL;
  36
  37         CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &ffi_type_sint,
  38                 arg_types) == FFI_OK);
  39
  40         args[0] = &format;
  41         args[1] = &doubleArg;
  42         args[2] = NULL;
  43
  44         ffi_call(&cif, FFI_FN(printf), &res, args);
  45         // { dg-output "7.0" }
  46         printf("res: %d\n", (int) res);
  47         // { dg-output "\nres: 4" }
  48
  49         CHECK(ffi_prep_closure_loc(pcl, &cif, cls_double_va_fn, NULL, code) == FFI_OK);
  50
  51         res     = ((int(*)(char*, double))(code))(format, doubleArg);
  52         // { dg-output "\n7.0" }
  53         printf("res: %d\n", (int) res);
  54         // { dg-output "\nres: 4" }
  55
  56         exit(0);
  57 }