// convert a readable to a JSString, copying string data
// static
JSString *
XPCStringConvert::ReadableToJSString(JSContext *cx,
const nsAString &readable)
{
JSString *str;
PRUint32 length = readable.Length();
nsStringBuffer *buf = nsStringBuffer::FromString(readable);
if (buf)
{
// yay, we can share the string's buffer!
if (sDOMStringFinalizerIndex == -1)
{
sDOMStringFinalizerIndex =
JS_AddExternalStringFinalizer(DOMStringFinalizer);
if (sDOMStringFinalizerIndex == -1)
return NULL;
}
str = JS_NewExternalString(cx,
reinterpret_cast<jschar *>(buf->Data()),
length, sDOMStringFinalizerIndex);
if (str)
buf->AddRef();
}
else
{
// blech, have to copy.
jschar *chars = reinterpret_cast<jschar *>
(JS_malloc(cx, (length + 1) *
sizeof(jschar)));
if (!chars)
return NULL;
if (length && !CopyUnicodeTo(readable, 0,
reinterpret_cast<PRUnichar *>(chars),
length))
{
JS_free(cx, chars);
return NULL;
}
chars[length] = 0;
str = JS_NewUCString(cx, chars, length);
if (!str)
JS_free(cx, chars);
}
return str;
}
// convert a readable to a JSString, copying string data
// static
jsval
XPCStringConvert::ReadableToJSVal(JSContext *cx,
const nsAString &readable,
nsStringBuffer** sharedBuffer)
{
JSString *str;
*sharedBuffer = nsnull;
PRUint32 length = readable.Length();
JSAtom *atom;
if (length == 0 && (atom = cx->runtime->atomState.emptyAtom))
{
return ATOM_TO_JSVAL(atom);
}
nsStringBuffer *buf = nsStringBuffer::FromString(readable);
if (buf)
{
// yay, we can share the string's buffer!
if (sDOMStringFinalizerIndex == -1)
{
sDOMStringFinalizerIndex =
JS_AddExternalStringFinalizer(DOMStringFinalizer);
if (sDOMStringFinalizerIndex == -1)
return JSVAL_NULL;
}
str = JS_NewExternalString(cx,
reinterpret_cast<jschar *>(buf->Data()),
length, sDOMStringFinalizerIndex);
if (str)
{
*sharedBuffer = buf;
}
}
else
{
// blech, have to copy.
jschar *chars = reinterpret_cast<jschar *>
(JS_malloc(cx, (length + 1) *
sizeof(jschar)));
if (!chars)
return JSVAL_NULL;
if (length && !CopyUnicodeTo(readable, 0,
reinterpret_cast<PRUnichar *>(chars),
length))
{
JS_free(cx, chars);
return JSVAL_NULL;
}
chars[length] = 0;
str = JS_NewUCString(cx, chars, length);
if (!str)
JS_free(cx, chars);
}
return STRING_TO_JSVAL(str);
}
