Subj : Re: Spider Monkey - 200/11 works, x=200/11 core dumps
To   : Sally <pookiebearbottom@yahoo.com>
From : Brendan Eich <brendan@meer.net>
Date : Mon Nov 10 2003 05:20 pm

Sally wrote:

>I am using the following code.  When ever I use basic math like
>"200/11" the script works.  When I try to assign a variable, like
>"x=200/11" I get a core dump.  Here is the code, any info would be
>helpful.  I am somewhat new to spidermonkey, but been using javascript
>for years (in case you are wondering, I am calling it from C++ and
>that is why I wrote the wrappers like this).
>  
>

You're making the same mistake that was diagnosed in 
news://news.mozilla.org:119/boiqeu$1ea52t$1@ID-3551.news.uni-berlin.de.

/be

>Thanks
>-Sal
>
>void *p=initJS();  /* set up sm MY JS_RTStruct */
>char r[1000]; /* result string */
>runJSScript(p,"11/2",r);/* works */
>runJSScript(p,"x=11/2",r);/* core dumps */
>
>typedef struct 
>{
>  JSContext *cx;
>  JSObject *global;
>  JSRuntime *rt;
>} JS_RTStruct;
>
>
>void *initJS()
>{
>  JS_RTStruct *ptr=(JS_RTStruct *)malloc(sizeof(JS_RTStruct));
>  JSClass global_class=
>  {
>    "global",0,
>    JS_PropertyStub,JS_PropertyStub,JS_PropertyStub,JS_PropertyStub,
>    JS_EnumerateStub,JS_ResolveStub,JS_ConvertStub,JS_FinalizeStub
>  };
>
>  ptr->rt = JS_NewRuntime(0x100000);
>  ptr->cx = JS_NewContext(ptr->rt, 0x1000);
>  ptr->global = JS_NewObject(ptr->cx, &global_class, NULL, NULL);
>  JS_InitStandardClasses(ptr->cx, ptr->global);
>
>  return ptr;
>}
>
>void runJSScript(void *p,char *script,char *result)
>{
>  JS_RTStruct *ptr=(JS_RTStruct *)p;
>  jsval rval;
>  JSString *str;
>  int lineno=0;
>  JSBool ok=JS_EvaluateScript(ptr->cx,ptr->global,script,
>			      strlen(script),NULL,lineno,&rval);
>  strcpy(result,JS_GetStringBytes(JS_ValueToString(ptr->cx, rval)));
>}
>  
>

.