github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/struct7.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 f1;
    12    float f2;
    13    double d;
    14  } test_structure_7;
    15  
    16  static test_structure_7 ABI_ATTR struct7 (test_structure_7 ts)
    17  {
    18    ts.f1 += 1;
    19    ts.f2 += 1;
    20    ts.d += 1;
    21  
    22    return ts;
    23  }
    24  
    25  int main (void)
    26  {
    27    ffi_cif cif;
    28    ffi_type *args[MAX_ARGS];
    29    void *values[MAX_ARGS];
    30    ffi_type ts7_type;
    31    ffi_type *ts7_type_elements[4];
    32  
    33    test_structure_7 ts7_arg;
    34  
    35    /* This is a hack to get a properly aligned result buffer */
    36    test_structure_7 *ts7_result =
    37      (test_structure_7 *) malloc (sizeof(test_structure_7));
    38  
    39    ts7_type.size = 0;
    40    ts7_type.alignment = 0;
    41    ts7_type.type = FFI_TYPE_STRUCT;
    42    ts7_type.elements = ts7_type_elements;
    43    ts7_type_elements[0] = &ffi_type_float;
    44    ts7_type_elements[1] = &ffi_type_float;
    45    ts7_type_elements[2] = &ffi_type_double;
    46    ts7_type_elements[3] = NULL;
    47  
    48    args[0] = &ts7_type;
    49    values[0] = &ts7_arg;
    50    
    51    /* Initialize the cif */
    52    CHECK(ffi_prep_cif(&cif, ABI_NUM, 1, &ts7_type, args) == FFI_OK);
    53    
    54    ts7_arg.f1 = 5.55f;
    55    ts7_arg.f2 = 55.5f;
    56    ts7_arg.d = 6.66;
    57  
    58    printf ("%g\n", ts7_arg.f1);
    59    printf ("%g\n", ts7_arg.f2);
    60    printf ("%g\n", ts7_arg.d);
    61    
    62    ffi_call(&cif, FFI_FN(struct7), ts7_result, values);
    63  
    64    printf ("%g\n", ts7_result->f1);
    65    printf ("%g\n", ts7_result->f2);
    66    printf ("%g\n", ts7_result->d);
    67    
    68    CHECK(ts7_result->f1 == 5.55f + 1);
    69    CHECK(ts7_result->f2 == 55.5f + 1);
    70    CHECK(ts7_result->d == 6.66 + 1);
    71    
    72    free (ts7_result);
    73    exit(0);
    74  }