JS向NPAPI传递参数，并返回结果

static bool js_call_function(const NPObject* npobj, const NPVariand* args, const unint32_t argCount, NPVariant* result)
{
...
//取值
//NPVARIANT_TO_BOOLEAN(args[0]);
//NPVARIANT_TO_INT32(  args[0]);
//NPVARIANT_TO_DOUBLE( args[0]);
NPString str = NPVARIANT_TO_STRING(args[0]);
char* ca = (char*)malloc(str.UTF8Length+1);
memset(ca, 0, str.UTF8Length+1);
strncpy(ca, str.UTF8Characters, str.UTF8Length);
...
//BOOLEAN_TO_NPVARIANT(result);
//  INT32_TO_NPVARIANT(result);
// DOUBLE_TO_NPVARIANT(result);
//返回值
char* text = "quantum7";
STRINGN_TO_NPVARIANT(text, strlen(text), *result);
}