JS_XDRStringOrNull(JSXDRState *xdr, JSString **strp)
{
uint32 null = (*strp == NULL);
if (!JS_XDRUint32(xdr, &null))
return JS_FALSE;
if (null) {
*strp = NULL;
return JS_TRUE;
}
return JS_XDRString(xdr, strp);
}
extern JSBool
js_XDRStringAtom(JSXDRState *xdr, JSAtom **atomp)
{
JSString *str;
uint32 nchars;
JSAtom *atom;
JSContext *cx;
jschar *chars;
jschar stackChars[256];
if (xdr->mode == JSXDR_ENCODE) {
JS_ASSERT(ATOM_IS_STRING(*atomp));
str = ATOM_TO_STRING(*atomp);
return JS_XDRString(xdr, &str);
}
/*
* Inline JS_XDRString when decoding to avoid JSString allocation
* for already existing atoms. See bug 321985.
*/
if (!JS_XDRUint32(xdr, &nchars))
return JS_FALSE;
atom = NULL;
cx = xdr->cx;
if (nchars <= JS_ARRAY_LENGTH(stackChars)) {
chars = stackChars;
} else {
/*
* This is very uncommon. Don't use the tempPool arena for this as
* most allocations here will be bigger than tempPool's arenasize.
*/
chars = (jschar *) cx->malloc(nchars * sizeof(jschar));
if (!chars)
return JS_FALSE;
}
if (XDRChars(xdr, chars, nchars))
atom = js_AtomizeChars(cx, chars, nchars, 0);
if (chars != stackChars)
cx->free(chars);
if (!atom)
return JS_FALSE;
*atomp = atom;
return JS_TRUE;
}
extern JSBool
js_XDRStringAtom(JSXDRState *xdr, JSAtom **atomp)
{
JSString *str;
uint32 nchars;
JSAtom *atom;
JSContext *cx;
void *mark;
jschar *chars;
if (xdr->mode == JSXDR_ENCODE) {
JS_ASSERT(ATOM_IS_STRING(*atomp));
str = ATOM_TO_STRING(*atomp);
return JS_XDRString(xdr, &str);
}
/*
* Inline JS_XDRString when decoding to avoid JSString allocation
* for already existing atoms. See bug 321985.
*/
if (!JS_XDRUint32(xdr, &nchars))
return JS_FALSE;
atom = NULL;
cx = xdr->cx;
mark = JS_ARENA_MARK(&cx->tempPool);
JS_ARENA_ALLOCATE_CAST(chars, jschar *, &cx->tempPool,
nchars * sizeof(jschar));
if (!chars)
JS_ReportOutOfMemory(cx);
else if (XDRChars(xdr, chars, nchars))
atom = js_AtomizeChars(cx, chars, nchars, 0);
JS_ARENA_RELEASE(&cx->tempPool, mark);
if (!atom)
return JS_FALSE;
*atomp = atom;
return JS_TRUE;
}
static JSBool
XDRValueBody(JSXDRState *xdr, uint32 type, jsval *vp)
{
switch (type) {
case JSVAL_XDRNULL:
*vp = JSVAL_NULL;
break;
case JSVAL_XDRVOID:
*vp = JSVAL_VOID;
break;
case JSVAL_STRING: {
JSString *str;
if (xdr->mode == JSXDR_ENCODE)
str = JSVAL_TO_STRING(*vp);
if (!JS_XDRString(xdr, &str))
return JS_FALSE;
if (xdr->mode == JSXDR_DECODE)
*vp = STRING_TO_JSVAL(str);
break;
}
case JSVAL_DOUBLE: {
jsdouble *dp;
if (xdr->mode == JSXDR_ENCODE)
dp = JSVAL_TO_DOUBLE(*vp);
if (!JS_XDRDouble(xdr, &dp))
return JS_FALSE;
if (xdr->mode == JSXDR_DECODE)
*vp = DOUBLE_TO_JSVAL(dp);
break;
}
case JSVAL_OBJECT: {
JSObject *obj;
if (xdr->mode == JSXDR_ENCODE)
obj = JSVAL_TO_OBJECT(*vp);
if (!js_XDRObject(xdr, &obj))
return JS_FALSE;
if (xdr->mode == JSXDR_DECODE)
*vp = OBJECT_TO_JSVAL(obj);
break;
}
case JSVAL_BOOLEAN: {
uint32 b;
if (xdr->mode == JSXDR_ENCODE)
b = (uint32) JSVAL_TO_BOOLEAN(*vp);
if (!JS_XDRUint32(xdr, &b))
return JS_FALSE;
if (xdr->mode == JSXDR_DECODE)
*vp = BOOLEAN_TO_JSVAL((JSBool) b);
break;
}
default: {
uint32 i;
JS_ASSERT(type & JSVAL_INT);
if (xdr->mode == JSXDR_ENCODE)
i = (uint32) JSVAL_TO_INT(*vp);
if (!JS_XDRUint32(xdr, &i))
return JS_FALSE;
if (xdr->mode == JSXDR_DECODE)
*vp = INT_TO_JSVAL((int32) i);
break;
}
}
return JS_TRUE;
}