ppInstrumentID 只能用静态字符串

[sunnyboy00]

             var code string
	fmt.Println("输入行情监控合约代码")
	fmt.Scanln(&code)
	code = strings.ToLower(code)

	//ppInstrumentID := []string{code}

	ppInstrumentID := []string{"rb1901"}

	log.Println(" ppInstrumentID", ppInstrumentID)
	p.SubscribeMarketData(ppInstrumentID)

如果采用注释的//ppInstrumentID := []string{code}，通不过，怎么才能绕开这个坑

[hankchan]

对，这是一个问题。我也正在尝试解决。

[sunnyboy00]

%typemap(gotype) (char **ppInstrumentID, int nCount) "[]string"

%typemap(in) (char *ppInstrumentID, int nCount)
%{
{
int i;
gostring a;

$2 = $input.len;
a = (_gostring_*) $input.array;
$1 = (char **) malloc (($2 + 1) * sizeof (char *));
for (i = 0; i < $2; i++) {
  
  /* Not work */
  //_gostring_ *ps = &a[i];
  //$1[i] = (char *) ps->p;
  //$1[i][ps->n] = '\0';

  /*Work well*/
  _gostring_ *ps = &a[i];
  $1[i] = (char*) malloc(ps->n + 1);
  memcpy($1[i], ps->p, ps->n);
  $1[i][ps->n] = '\0';

}
$1[i] = NULL;

}
%}

%typemap(argout) (char *ppInstrumentID, int nCount) "" / override char *[] default */

%typemap(freearg) (char **ppInstrumentID, int nCount)
%{
{
int i;
for (i = 0; i < $2; i++)
{
free ($1[i]);
}
free($1);
}
%}

把这段代码改掉，参照下面的代码，用golang 实现应该就可以了，对swig 不太熟悉，不知道怎么更改这段

func Test(args[] string){
arg := make([](* Ctype_char), 0) //C语言char*指针创建切片
l := len(args)
for i, := range args{
char := C.CString(args[i])
defer C.free(unsafe.Pointer(char)) //释放内存
strptr := (_Ctype_char)(unsafe.Pointer(char))
arg = append(arg, strptr) //将char指针加入到arg切片
}

C.test(C.int(l), (_Ctype_char)(unsafe.Pointer(&arg[0]))) //即c语言的main(int argc,charargv)
}

[sunnyboy00]

///订阅行情
func (p *GoCThostFtdcMdSpi) SubscribeMarketData(name []string) {

arg := make([](*C.char), 0)
l := len(name)
for i, _ := range name {
	char := C.CString(name[i])
	defer C.free(unsafe.Pointer(char)) //释放内存
	strptr := (*C.char)(unsafe.Pointer(char))
	arg = append(arg, strptr) //将char指针加入到arg切片
}

iResult := p.Client.MdApi.SubscribeMarketData((*string)(unsafe.Pointer(&arg[0])), int(l))

if iResult != 0 {
	log.Println("发送行情订阅请求: 失败.")
} else {
	log.Println("发送行情订阅请求: 成功.")
}

}
这样就可以了

[ceasar09]

楼上正解 好牛