On Sun, Aug 5, 2018 at 10:29 PM, nicolas_boiteux via golang-nuts
<golang-nuts@googlegroups.com> 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
>> <golan...@googlegroups.com> 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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