RegExpObject *
RegExpObjectBuilder::clone(RegExpObject *other, RegExpObject *proto)
{
if (!getOrCreateClone(proto))
return NULL;
/*
* Check that the RegExpPrivate for the original is okay to use in
* the clone -- if the |RegExpStatics| provides more flags we'll
* need a different |RegExpPrivate|.
*/
RegExpStatics *res = cx->regExpStatics();
RegExpFlag origFlags = other->getFlags();
RegExpFlag staticsFlags = res->getFlags();
if ((origFlags & staticsFlags) != staticsFlags) {
RegExpFlag newFlags = RegExpFlag(origFlags | staticsFlags);
return build(other->getSource(), newFlags);
}
RegExpPrivate *toShare = other->getOrCreatePrivate(cx);
if (!toShare)
return NULL;
toShare->incref(cx);
return build(AlreadyIncRefed<RegExpPrivate>(toShare));
}
RegExpObject *
RegExpObjectBuilder::build(RegExpObject *other)
{
RegExpPrivate *rep = other->getOrCreatePrivate(cx);
if (!rep)
return NULL;
/* Now, incref it for the RegExpObject being built. */
rep->incref(cx);
return build(AlreadyIncRefed<RegExpPrivate>(rep));
}
/*
* Compile a new |RegExpPrivate| for the |RegExpObject|.
*
* Per ECMAv5 15.10.4.1, we act on combinations of (pattern, flags) as
* arguments:
*
* RegExp, undefined => flags := pattern.flags
* RegExp, _ => throw TypeError
* _ => pattern := ToString(pattern) if defined(pattern) else ''
* flags := ToString(flags) if defined(flags) else ''
*/
static bool
CompileRegExpObject(JSContext *cx, RegExpObject *obj, uintN argc, Value *argv, Value *rval)
{
if (argc == 0) {
if (!ResetRegExpObjectWithStatics(cx, obj, cx->runtime->emptyString))
return false;
*rval = ObjectValue(*obj);
return true;
}
Value sourceValue = argv[0];
if (ValueIsRegExp(sourceValue)) {
/*
* If we get passed in a |RegExpObject| source we return a new
* object with the same |RegExpPrivate|.
*
* Note: the regexp static flags are not taken into consideration here.
*/
JSObject &sourceObj = sourceValue.toObject();
if (argc >= 2 && !argv[1].isUndefined()) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_NEWREGEXP_FLAGGED);
return false;
}
RegExpPrivate *rep = sourceObj.asRegExp()->getPrivate();
if (!rep)
return false;
rep->incref(cx);
if (!ResetRegExpObject(cx, obj, AlreadyIncRefed<RegExpPrivate>(rep)))
return false;
*rval = ObjectValue(*obj);
return true;
}
JSString *sourceStr;
if (sourceValue.isUndefined()) {
sourceStr = cx->runtime->emptyString;
} else {
/* Coerce to string and compile. */
sourceStr = js_ValueToString(cx, sourceValue);
if (!sourceStr)
return false;
}
RegExpFlag flags = RegExpFlag(0);
if (argc > 1 && !argv[1].isUndefined()) {
JSString *flagStr = js_ValueToString(cx, argv[1]);
if (!flagStr)
return false;
argv[1].setString(flagStr);
if (!ParseRegExpFlags(cx, flagStr, &flags))
return false;
}
JSString *escapedSourceStr = EscapeNakedForwardSlashes(cx, sourceStr);
if (!escapedSourceStr)
return false;
if (!ResetRegExpObjectWithStatics(cx, obj, escapedSourceStr, flags))
return false;
*rval = ObjectValue(*obj);
return true;
}