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   unsigned long ul;
  24
  25   args[0] = &ffi_type_uchar;
  26   values[0] = &uc;
  27
  28   /* Initialize the cif */
  29   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  30                      &ffi_type_uchar, args) == FFI_OK);
  31
  32   for (uc = (unsigned char) '\x00';
  33        uc < (unsigned char) '\xff'; uc++)
  34     {
  35       ul++;
  36       ffi_call(&cif, FFI_FN(return_uc), &rint, values);
  37       CHECK(rint == (signed int) uc);
  38     }
  39   exit(0);
  40 }