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 /* { dg-output "" { xfail mips-sgi-irix6* } } PR libffi/46660 */
  10
  11 #include "ffitest.h"
  12
  13 static void
  14 cls_double_va_fn(ffi_cif* cif __UNUSED__, void* resp,
  15                  void** args, void* userdata __UNUSED__)
  16 {
  17         char*   format          = *(char**)args[0];
  18         double  doubleValue     = *(double*)args[1];
  19
  20         *(ffi_arg*)resp = printf(format, doubleValue);
  21 }
  22
  23 int main (void)
  24 {
  25         ffi_cif cif;
  26         void *code;
  27         ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  28         void* args[3];
  29         ffi_type* arg_types[3];
  30
  31         char*   format          = "%.1f\n";
  32         double  doubleArg       = 7;
  33         ffi_arg res                     = 0;
  34
  35         arg_types[0] = &ffi_type_pointer;
  36         arg_types[1] = &ffi_type_double;
  37         arg_types[2] = NULL;
  38
  39         /* This printf call is variadic */
  40         CHECK(ffi_prep_cif_var(&cif, FFI_DEFAULT_ABI, 1, 2, &ffi_type_sint,
  41                                arg_types) == FFI_OK);
  42
  43         args[0] = &format;
  44         args[1] = &doubleArg;
  45         args[2] = NULL;
  46
  47         ffi_call(&cif, FFI_FN(printf), &res, args);
  48         /* { dg-output "7.0" } */
  49         printf("res: %d\n", (int) res);
  50         /* { dg-output "\nres: 4" } */
  51
  52         CHECK(ffi_prep_closure_loc(pcl, &cif, cls_double_va_fn, NULL,
  53                                    code) == FFI_OK);
  54
  55         res = ((int(*)(char*, ...))(code))(format, doubleArg);
  56         /* { dg-output "\n7.0" } */
  57         printf("res: %d\n", (int) res);
  58         /* { dg-output "\nres: 4" } */
  59
  60         exit(0);
  61 }