/*
* Compile a new |RegExpShared| 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, RegExpObjectBuilder &builder, CallArgs args)
{
if (args.length() == 0) {
RegExpStatics *res = cx->regExpStatics();
Rooted<JSAtom*> empty(cx, cx->runtime->emptyString);
RegExpObject *reobj = builder.build(empty, res->getFlags());
if (!reobj)
return false;
args.rval().setObject(*reobj);
return true;
}
RootedValue sourceValue(cx, args[0]);
/*
* If we get passed in an object whose internal [[Class]] property is
* "RegExp", return a new object with the same source/flags.
*/
if (IsObjectWithClass(sourceValue, ESClass_RegExp, cx)) {
/*
* Beware, sourceObj may be a (transparent) proxy to a RegExp, so only
* use generic (proxyable) operations on sourceObj that do not assume
* sourceObj.isRegExp().
*/
RootedObject sourceObj(cx, &sourceValue.toObject());
if (args.hasDefined(1)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_NEWREGEXP_FLAGGED);
return false;
}
/*
* Only extract the 'flags' out of sourceObj; do not reuse the
* RegExpShared since it may be from a different compartment.
*/
RegExpFlag flags;
{
RegExpGuard g(cx);
if (!RegExpToShared(cx, sourceObj, &g))
return false;
flags = g->getFlags();
}
/*
* 'toSource' is a permanent read-only property, so this is equivalent
* to executing RegExpObject::getSource on the unwrapped object.
*/
RootedValue v(cx);
if (!JSObject::getProperty(cx, sourceObj, sourceObj, cx->names().source, &v))
return false;
Rooted<JSAtom*> sourceAtom(cx, &v.toString()->asAtom());
RegExpObject *reobj = builder.build(sourceAtom, flags);
if (!reobj)
return false;
args.rval().setObject(*reobj);
return true;
}
RootedAtom source(cx);
if (sourceValue.isUndefined()) {
source = cx->runtime->emptyString;
} else {
/* Coerce to string and compile. */
JSString *str = ToString<CanGC>(cx, sourceValue);
if (!str)
return false;
source = AtomizeString<CanGC>(cx, str);
if (!source)
return false;
}
RegExpFlag flags = RegExpFlag(0);
if (args.hasDefined(1)) {
RootedString flagStr(cx, ToString<CanGC>(cx, args[1]));
if (!flagStr)
return false;
args[1].setString(flagStr);
if (!ParseRegExpFlags(cx, flagStr, &flags))
return false;
}
RootedAtom escapedSourceStr(cx, EscapeNakedForwardSlashes(cx, source));
if (!escapedSourceStr)
return false;
if (!js::RegExpShared::checkSyntax(cx, NULL, escapedSourceStr))
return false;
RegExpStatics *res = cx->regExpStatics();
RegExpObject *reobj = builder.build(escapedSourceStr, RegExpFlag(flags | res->getFlags()));
if (!reobj)
return false;
args.rval().setObject(*reobj);
return true;
}
/*
* 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, RegExpObjectBuilder &builder,
uintN argc, Value *argv, Value *rval)
{
if (argc == 0) {
RegExpStatics *res = cx->regExpStatics();
RegExpObject *reobj = builder.build(cx->runtime->emptyString, res->getFlags());
if (!reobj)
return false;
*rval = ObjectValue(*reobj);
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 source/flags.
*
* 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;
}
RegExpObject *reobj = builder.build(sourceObj.asRegExp());
if (!reobj)
return false;
*rval = ObjectValue(*reobj);
return true;
}
JSLinearString *sourceStr;
if (sourceValue.isUndefined()) {
sourceStr = cx->runtime->emptyString;
} else {
/* Coerce to string and compile. */
JSString *str = ToString(cx, sourceValue);
if (!str)
return false;
sourceStr = str->ensureLinear(cx);
if (!sourceStr)
return false;
}
RegExpFlag flags = RegExpFlag(0);
if (argc > 1 && !argv[1].isUndefined()) {
JSString *flagStr = ToString(cx, argv[1]);
if (!flagStr)
return false;
argv[1].setString(flagStr);
if (!ParseRegExpFlags(cx, flagStr, &flags))
return false;
}
JSLinearString *escapedSourceStr = EscapeNakedForwardSlashes(cx, sourceStr);
if (!escapedSourceStr)
return false;
if (!CheckRegExpSyntax(cx, escapedSourceStr))
return false;
RegExpStatics *res = cx->regExpStatics();
RegExpObject *reobj = builder.build(escapedSourceStr, RegExpFlag(flags | res->getFlags()));
if (!reobj)
return NULL;
*rval = ObjectValue(*reobj);
return true;
}