libffi/testsuite/libffi.call/negint.c

   1 /* Area:        ffi_call
   2    Purpose:     Check that negative integers are passed correctly.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  From the original ffitest.c  */
   6
   7 /* { dg-do run } */
   8 /* { dg-options -O2 } */
   9
  10 #include "ffitest.h"
  11
  12 static int checking(int a, short b, signed char c)
  13 {
  14
  15   return (a < 0 && b < 0 && c < 0);
  16 }
  17
  18 int main (void)
  19 {
  20   ffi_cif cif;
  21   ffi_type *args[MAX_ARGS];
  22   void *values[MAX_ARGS];
  23   ffi_arg rint;
  24
  25   signed int si;
  26   signed short ss;
  27   signed char sc;
  28
  29   args[0] = &ffi_type_sint;
  30   values[0] = &si;
  31   args[1] = &ffi_type_sshort;
  32   values[1] = &ss;
  33   args[2] = &ffi_type_schar;
  34   values[2] = &sc;
  35
  36   /* Initialize the cif */
  37   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
  38                      &ffi_type_sint, args) == FFI_OK);
  39
  40   si = -6;
  41   ss = -12;
  42   sc = -1;
  43
  44   checking (si, ss, sc);
  45
  46   ffi_call(&cif, FFI_FN(checking), &rint, values);
  47
  48   printf ("%d vs %d\n", (int)rint, checking (si, ss, sc));
  49
  50   CHECK(rint != 0);
  51
  52   exit (0);
  53 }