github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/struct5.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    char c1;
    12    char c2;
    13  } test_structure_5;
    14  
    15  static test_structure_5 ABI_ATTR struct5(test_structure_5 ts1, test_structure_5 ts2)
    16  {
    17    ts1.c1 += ts2.c1;
    18    ts1.c2 -= ts2.c2;
    19    
    20    return ts1;
    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 ts5_type;
    29    ffi_type *ts5_type_elements[3];
    30  
    31    test_structure_5 ts5_arg1, ts5_arg2;
    32  
    33    /* This is a hack to get a properly aligned result buffer */
    34    test_structure_5 *ts5_result =
    35      (test_structure_5 *) malloc (sizeof(test_structure_5));
    36  
    37    ts5_type.size = 0;
    38    ts5_type.alignment = 0;
    39    ts5_type.type = FFI_TYPE_STRUCT;
    40    ts5_type.elements = ts5_type_elements;
    41    ts5_type_elements[0] = &ffi_type_schar;
    42    ts5_type_elements[1] = &ffi_type_schar;
    43    ts5_type_elements[2] = NULL;
    44  
    45    args[0] = &ts5_type;
    46    args[1] = &ts5_type;
    47    values[0] = &ts5_arg1;
    48    values[1] = &ts5_arg2;
    49    
    50    /* Initialize the cif */
    51    CHECK(ffi_prep_cif(&cif, ABI_NUM, 2, &ts5_type, args) == FFI_OK);
    52    
    53    ts5_arg1.c1 = 2;
    54    ts5_arg1.c2 = 6;
    55    ts5_arg2.c1 = 5;
    56    ts5_arg2.c2 = 3;
    57    
    58    ffi_call (&cif, FFI_FN(struct5), ts5_result, values);
    59    
    60    CHECK(ts5_result->c1 == 7); 
    61    CHECK(ts5_result->c2 == 3);
    62    
    63    
    64    free (ts5_result);
    65    exit(0);
    66  }