github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/struct6.c (about)

     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  typedef struct
    10  {
    11    float f;
    12    double d;
    13  } test_structure_6;
    14  
    15  static test_structure_6 ABI_ATTR struct6 (test_structure_6 ts)
    16  {
    17    ts.f += 1;
    18    ts.d += 1;
    19    
    20    return ts;
    21  }
    22  
    23  int main (void)
    24  {
    25    ffi_cif cif;
    26    ffi_type *args[MAX_ARGS];
    27    void *values[MAX_ARGS];
    28    ffi_type ts6_type;
    29    ffi_type *ts6_type_elements[3];
    30  
    31    test_structure_6 ts6_arg;
    32  
    33    /* This is a hack to get a properly aligned result buffer */
    34    test_structure_6 *ts6_result =
    35      (test_structure_6 *) malloc (sizeof(test_structure_6));
    36  
    37    ts6_type.size = 0;
    38    ts6_type.alignment = 0;
    39    ts6_type.type = FFI_TYPE_STRUCT;
    40    ts6_type.elements = ts6_type_elements;
    41    ts6_type_elements[0] = &ffi_type_float;
    42    ts6_type_elements[1] = &ffi_type_double;
    43    ts6_type_elements[2] = NULL;
    44  
    45    args[0] = &ts6_type;
    46    values[0] = &ts6_arg;
    47  
    48    /* Initialize the cif */
    49    CHECK(ffi_prep_cif(&cif, ABI_NUM, 1, &ts6_type, args) == FFI_OK);
    50    
    51    ts6_arg.f = 5.55f;
    52    ts6_arg.d = 6.66;
    53    
    54    printf ("%g\n", ts6_arg.f);
    55    printf ("%g\n", ts6_arg.d);
    56  
    57    ffi_call(&cif, FFI_FN(struct6), ts6_result, values);
    58      
    59    CHECK(ts6_result->f == 5.55f + 1);
    60    CHECK(ts6_result->d == 6.66 + 1);
    61      
    62    free (ts6_result);
    63    exit(0);
    64  }