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   ts.uc++;
  20   ts.d--;
  21   ts.ui++;
  22
  23   return ts;
  24 }
  25
  26 int main (void)
  27 {
  28   ffi_cif cif;
  29   ffi_type *args[MAX_ARGS];
  30   void *values[MAX_ARGS];
  31   ffi_type ts1_type;
  32   ffi_type *ts1_type_elements[4];
  33   ts1_type.size = 0;
  34   ts1_type.alignment = 0;
  35   ts1_type.type = FFI_TYPE_STRUCT;
  36   ts1_type.elements = ts1_type_elements;
  37   ts1_type_elements[0] = &ffi_type_uchar;
  38   ts1_type_elements[1] = &ffi_type_double;
  39   ts1_type_elements[2] = &ffi_type_uint;
  40   ts1_type_elements[3] = NULL;
  41
  42   test_structure_1 ts1_arg;
  43   /* This is a hack to get a properly aligned result buffer */
  44   test_structure_1 *ts1_result =
  45     (test_structure_1 *) malloc (sizeof(test_structure_1));
  46
  47   args[0] = &ts1_type;
  48   values[0] = &ts1_arg;
  49
  50   /* Initialize the cif */
  51   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  52                      &ts1_type, args) == FFI_OK);
  53
  54   ts1_arg.uc = '\x01';
  55   ts1_arg.d = 3.14159;
  56   ts1_arg.ui = 555;
  57
  58   ffi_call(&cif, FFI_FN(struct1), ts1_result, values);
  59
  60   CHECK(ts1_result->ui == 556);
  61   CHECK(ts1_result->d == 3.14159 - 1);
  62
  63   free (ts1_result);
  64   exit(0);
  65 }