How one would increment cRetValue pointer in go code to access the successive bytes ?
*cRetValue gives me the zeroth byte only. How to get the 2nd, 3rd byte? The case I have has a pointer to array of structs in C land and I want to iterate over them in Go. Thanks!! On Sunday, April 17, 2016 at 9:54:58 PM UTC-7, Ian Lance Taylor wrote: > > On Sun, Apr 17, 2016 at 8:51 PM, Ray Yang <rayya...@gmail.com > <javascript:>> wrote: > > > > Now after some experiment, I have the following solution to have > returnValue > > passed back from the C callee. However, as it's said that C.GoString > > allocates some memory, I have to free it in the C function before set it > to > > a new value. > > > > Is there a better way to avoid such extra memory freeing? I try to use > > "c_retValue := C.CString(nil)" but "go build" complains "cannot use nil > as > > type string in argument to _Cfunc_CString" > > Don't pass C.CString(nil). Write something like > var cRetValue *C.char > ret := bool(C.func(&cRetValue)) > > (And, for style reasons, don't write `if ret == true`, just write `if > ret`.) > > Ian > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
