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
   9 #include "ffitest.h"
  10
  11 static int checking(int a, short b, signed char c)
  12 {
  13
  14   return (a < 0 && b < 0 && c < 0);
  15 }
  16
  17 int main (void)
  18 {
  19   ffi_cif cif;
  20   ffi_type *args[MAX_ARGS];
  21   void *values[MAX_ARGS];
  22   ffi_arg rint;
  23
  24   signed int si;
  25   signed short ss;
  26   signed char sc;
  27
  28   args[0] = &ffi_type_sint;
  29   values[0] = &si;
  30   args[1] = &ffi_type_sshort;
  31   values[1] = &ss;
  32   args[2] = &ffi_type_schar;
  33   values[2] = &sc;
  34
  35   /* Initialize the cif */
  36   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
  37                      &ffi_type_sint, args) == FFI_OK);
  38
  39   si = -6;
  40   ss = -12;
  41   sc = -1;
  42
  43   checking (si, ss, sc);
  44
  45   ffi_call(&cif, FFI_FN(checking), &rint, values);
  46
  47   printf ("%d vs %d\n", (int)rint, checking (si, ss, sc));
  48
  49   CHECK(rint != 0);
  50
  51   exit (0);
  52 }