cls_double_va.c

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/* Area:                ffi_call, closure_call
   Purpose:             Test doubles passed in variable argument lists.
   Limitations: none.
   PR:                  none.
   Originator:  Blake Chaffin 6/6/2007   */
 
/* { dg-do run { xfail strongarm*-*-* xscale*-*-* } } */
/* { dg-output "" { xfail avr32*-*-* } } */
/* { dg-output "" { xfail mips-sgi-irix6* } } PR libffi/46660 */
 
#include "ffitest.h"
 
static void
cls_double_va_fn(ffi_cif* cif __UNUSED__, void* resp, 
                 void** args, void* userdata __UNUSED__)
{
        char*   format          = *(char**)args[0];
        double  doubleValue     = *(double*)args[1];
 
        *(ffi_arg*)resp = printf(format, doubleValue);
}
 
int main (void)
{
        ffi_cif cif;
        void *code;
        ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
        void* args[3];
        ffi_type* arg_types[3];
 
        char*   format          = "%.1f\n";
        double  doubleArg       = 7;
        ffi_arg res                     = 0;
 
        arg_types[0] = &ffi_type_pointer;
        arg_types[1] = &ffi_type_double;
        arg_types[2] = NULL;
 
        /* This printf call is variadic */
        CHECK(ffi_prep_cif_var(&cif, FFI_DEFAULT_ABI, 1, 2, &ffi_type_sint,
                               arg_types) == FFI_OK);
 
        args[0] = &format;
        args[1] = &doubleArg;
        args[2] = NULL;
 
        ffi_call(&cif, FFI_FN(printf), &res, args);
        /* { dg-output "7.0" } */
        printf("res: %d\n", (int) res);
        /* { dg-output "\nres: 4" } */
 
        CHECK(ffi_prep_closure_loc(pcl, &cif, cls_double_va_fn, NULL,
                                   code) == FFI_OK);
 
        res = ((int(*)(char*, ...))(code))(format, doubleArg);
        /* { dg-output "\n7.0" } */
        printf("res: %d\n", (int) res);
        /* { dg-output "\nres: 4" } */
 
        exit(0);
}