yes i used the code from this page:
func Float64bits(f float64) uint64 {
return *(*uint64)(unsafe.Pointer(&f))
}
adapted to my use case
*(*int)(unsafe.Pointer(limit)
Le lundi 6 août 2018 19:53:07 UTC+2, Ian Lance Taylor a écrit :
>
> On Sun, Aug 5, 2018 at 10:29 PM, nicolas_boiteux via golang-nuts
> <[email protected] <javascript:>> wrote:
> >
> > thanks you, the A3 community finaly help me to solve the last problem
> >
> > for index := C.int(0); index < argc; index++ {
> > out = append(out, C.GoString(*argv))
> > argv = (**C.char)(unsafe.Pointer(uintptr(unsafe.Pointer(argv)) +
> > offset))
> > }
> >
> > I dont really understand why but it seems there was a problem with my
> > casting method with unsafe
> >
> > *(*int)(unsafe.Pointer(limit)
>
> See https://golang.org/pkg/unsafe for the exact ways that you are
> permitted to use unsafe.Pointer.
>
> Ian
>
> > Le dimanche 5 août 2018 15:02:47 UTC+2, Jan Mercl a écrit :
> >>
> >> On Sun, Aug 5, 2018 at 2:50 PM nicolas_boiteux via golang-nuts
> >> <[email protected]> wrote:
> >>
> >> > not sure to understand cause the iteration in your example is done on
> os
> >> > interface from golang not from c char array :(
> >>
> >> Not sure what you mean by 'os interface'. Here's the part that iterates
> >> **C.char, except pointers are transformed to uintptrs. Other that that
> it's
> >> what you're, I think, after
> >>
> >> // Xmain is defined at main.c:3:5
> >> func Xmain(tls crt.TLS, _argc int32, _argv uintptr /* **int8 */) (r
> int32)
> >> {
> >> var _p uintptr // **int8
> >>
> >> _p = _argv
> >> _1:
> >> if (*(*uintptr)(unsafe.Pointer(_p))) == 0 {
> >> goto _3
> >> }
> >>
> >> crt.Xprintf(tls, ts+0 /* "%s\n" */, *(*uintptr)(unsafe.Pointer(_p)))
> >> _p += 8
> >> goto _1
> >>
> >> _3:
> >> return r
> >> }
> >>
> >> Manually converting (untested again):
> >>
> >> func foo(argv **C.char) []string {
> >> var a []string
> >> for p := argv; *p != nil; *(*uintptr)(unsafe.Pointer(p)) +=
> >> unsafe.Sizeof(*p) {
> >> a = append(a, GoString(*p))
> >> }
> >> rerurn a
> >> }
> >>
> >>
> >> --
> >>
> >> -j
> >
> > --
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