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

     1  /* Area:	closure_call
     2     Purpose:	Test anonymous unsigned char argument.
     3     Limitations:	none.
     4     PR:		none.
     5     Originator:	ARM Ltd. */
     6  
     7  /* { dg-do run } */
     8  #include "ffitest.h"
     9  
    10  typedef unsigned char T;
    11  
    12  static void cls_ret_T_fn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    13  			 void* userdata __UNUSED__)
    14   {
    15     *(ffi_arg *)resp = *(T *)args[0];
    16  
    17     printf("%d: %d %d\n", (int)(*(ffi_arg *)resp), *(T *)args[0], *(T *)args[1]);
    18   }
    19  
    20  typedef T (*cls_ret_T)(T, ...);
    21  
    22  int main (void)
    23  {
    24    ffi_cif cif;
    25    void *code;
    26    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    27    ffi_type * cl_arg_types[3];
    28    T res;
    29  
    30    cl_arg_types[0] = &ffi_type_uchar;
    31    cl_arg_types[1] = &ffi_type_uchar;
    32    cl_arg_types[2] = NULL;
    33  
    34    /* Initialize the cif */
    35    CHECK(ffi_prep_cif_var(&cif, FFI_DEFAULT_ABI, 1, 2,
    36  			 &ffi_type_uchar, cl_arg_types) == FFI_OK);
    37  
    38    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_ret_T_fn, NULL, code)  == FFI_OK);
    39    res = ((((cls_ret_T)code)(67, 4)));
    40    /* { dg-output "67: 67 4" } */
    41    printf("res: %d\n", res);
    42    /* { dg-output "\nres: 67" } */
    43    exit(0);
    44  }