libffi/testsuite/libffi.call/return_sc.c

   1 /* Area:        ffi_call
   2    Purpose:     Check return value signed char.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  From the original ffitest.c  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 static signed char return_sc(signed char sc)
  11 {
  12   return sc;
  13 }
  14 int main (void)
  15 {
  16   ffi_cif cif;
  17   ffi_type *args[MAX_ARGS];
  18   void *values[MAX_ARGS];
  19   ffi_arg rint;
  20   signed char sc;
  21   unsigned long ul;
  22
  23   args[0] = &ffi_type_schar;
  24   values[0] = &sc;
  25
  26   /* Initialize the cif */
  27   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  28                      &ffi_type_schar, args) == FFI_OK);
  29
  30   for (sc = (signed char) -127;
  31        sc < (signed char) 127; sc++)
  32     {
  33       ul++;
  34       ffi_call(&cif, FFI_FN(return_sc), &rint, values);
  35       CHECK(rint == (ffi_arg) sc);
  36     }
  37   exit(0);
  38 }