Ruby: ext/fiddle/libffi-3.2.1/testsuite/libffi.call/return_dbl.c Source File

Ruby 3.0.5p211 (2022-11-24 revision ba5cf0f7c52d4d35cc6a173c89eda98ceffa2dcf)

return_dbl.c
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1/* Area: ffi_call
2 Purpose: Check return value double.
3 Limitations: none.
4 PR: none.
5 Originator: <andreast@gcc.gnu.org> 20050212 */
6
7/* { dg-do run } */
8#include "ffitest.h"
9
10static double return_dbl(double dbl)
11{
12 printf ("%f\n", dbl);
13 return 2 * dbl;
14}
15 int main (void)
16{
17 ffi_cif cif;
18 ffi_type *args[MAX_ARGS];
19 void *values[MAX_ARGS];
20 double dbl, rdbl;
21
22 args[0] = &ffi_type_double;
23 values[0] = &dbl;
24
25 /* Initialize the cif */
26 CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
27 &ffi_type_double, args) == FFI_OK);
28
29 for (dbl = -127.3; dbl < 127; dbl++)
30 {
31 ffi_call(&cif, FFI_FN(return_dbl), &rdbl, values);
32 printf ("%f vs %f\n", rdbl, return_dbl(dbl));
33 CHECK(rdbl == 2 * dbl);
34 }
35 exit(0);
36}
ffi_call
void ffi_call(ffi_cif *cif, void(*fn)(void), void *rvalue, void **avalue)
Definition: ffi.c:813
FFI_DEFAULT_ABI
@ FFI_DEFAULT_ABI
Definition: ffitarget.h:38
CHECK
#define CHECK(sub)
Definition: compile.c:429
ffitest.h
MAX_ARGS
#define MAX_ARGS
Definition: function.c:17
ffi_prep_cif
ffi_status ffi_prep_cif(ffi_cif *cif, ffi_abi abi, unsigned int nargs, ffi_type *rtype, ffi_type **atypes)
Definition: prep_cif.c:226
main
int main(void)
Definition: return_dbl.c:15