libffi/testsuite/libffi.call/return_uc.c

   1 /* Area:        ffi_call
   2    Purpose:     Check return value unsigned 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 unsigned char return_uc(unsigned char uc)
  11 {
  12   return uc;
  13 }
  14
  15 int main (void)
  16 {
  17   ffi_cif cif;
  18   ffi_type *args[MAX_ARGS];
  19   void *values[MAX_ARGS];
  20   ffi_arg rint;
  21
  22   unsigned char uc;
  23
  24   args[0] = &ffi_type_uchar;
  25   values[0] = &uc;
  26
  27   /* Initialize the cif */
  28   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  29                      &ffi_type_uchar, args) == FFI_OK);
  30
  31   for (uc = (unsigned char) '\x00';
  32        uc < (unsigned char) '\xff'; uc++)
  33     {
  34       ffi_call(&cif, FFI_FN(return_uc), &rint, values);
  35       CHECK(rint == (signed int) uc);
  36     }
  37   exit(0);
  38 }