libffi/testsuite/libffi.call/struct1.c

   1 /* Area:        ffi_call
   2    Purpose:     Check structures.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  From the original ffitest.c  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 typedef struct
  11 {
  12   unsigned char uc;
  13   double d;
  14   unsigned int ui;
  15 } test_structure_1;
  16
  17 static test_structure_1 struct1(test_structure_1 ts)
  18 {
  19   /*@-type@*/
  20   ts.uc++;
  21   /*@=type@*/
  22   ts.d--;
  23   ts.ui++;
  24
  25   return ts;
  26 }
  27
  28 int main (void)
  29 {
  30   ffi_cif cif;
  31   ffi_type *args[MAX_ARGS];
  32   void *values[MAX_ARGS];
  33   ffi_type ts1_type;
  34   ffi_type *ts1_type_elements[4];
  35   ts1_type.size = 0;
  36   ts1_type.alignment = 0;
  37   ts1_type.type = FFI_TYPE_STRUCT;
  38   ts1_type.elements = ts1_type_elements;
  39   ts1_type_elements[0] = &ffi_type_uchar;
  40   ts1_type_elements[1] = &ffi_type_double;
  41   ts1_type_elements[2] = &ffi_type_uint;
  42   ts1_type_elements[3] = NULL;
  43
  44   test_structure_1 ts1_arg;
  45   /* This is a hack to get a properly aligned result buffer */
  46   test_structure_1 *ts1_result =
  47     (test_structure_1 *) malloc (sizeof(test_structure_1));
  48
  49   args[0] = &ts1_type;
  50   values[0] = &ts1_arg;
  51
  52   /* Initialize the cif */
  53   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  54                      &ts1_type, args) == FFI_OK);
  55
  56   ts1_arg.uc = '\x01';
  57   ts1_arg.d = 3.14159;
  58   ts1_arg.ui = 555;
  59
  60   ffi_call(&cif, FFI_FN(struct1), ts1_result, values);
  61
  62   CHECK(ts1_result->ui == 556);
  63   CHECK(ts1_result->d == 3.14159 - 1);
  64
  65   free (ts1_result);
  66   exit(0);
  67 }