1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/vm/ErrorObject.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,101 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef vm_ErrorObject_h_
1.11 +#define vm_ErrorObject_h_
1.12 +
1.13 +#include "jsobj.h"
1.14 +
1.15 +#include "vm/Shape.h"
1.16 +
1.17 +struct JSExnPrivate;
1.18 +
1.19 +/*
1.20 + * Initialize the exception constructor/prototype hierarchy.
1.21 + */
1.22 +extern JSObject *
1.23 +js_InitExceptionClasses(JSContext *cx, JS::HandleObject obj);
1.24 +
1.25 +namespace js {
1.26 +
1.27 +class ErrorObject : public JSObject
1.28 +{
1.29 + static ErrorObject *
1.30 + createProto(JSContext *cx, JS::Handle<GlobalObject*> global, JSExnType type,
1.31 + JS::HandleObject proto);
1.32 +
1.33 + /* For access to createProto. */
1.34 + friend JSObject *
1.35 + ::js_InitExceptionClasses(JSContext *cx, JS::HandleObject global);
1.36 +
1.37 + /* For access to assignInitialShape. */
1.38 + friend bool
1.39 + EmptyShape::ensureInitialCustomShape<ErrorObject>(ExclusiveContext *cx,
1.40 + Handle<ErrorObject*> obj);
1.41 +
1.42 + /*
1.43 + * Assign the initial error shape to the empty object. (This shape does
1.44 + * *not* include .message, which must be added separately if needed; see
1.45 + * ErrorObject::init.)
1.46 + */
1.47 + static Shape *
1.48 + assignInitialShape(ExclusiveContext *cx, Handle<ErrorObject*> obj);
1.49 +
1.50 + static bool
1.51 + init(JSContext *cx, Handle<ErrorObject*> obj, JSExnType type,
1.52 + ScopedJSFreePtr<JSErrorReport> *errorReport, HandleString fileName, HandleString stack,
1.53 + uint32_t lineNumber, uint32_t columnNumber, HandleString message);
1.54 +
1.55 + protected:
1.56 + static const uint32_t EXNTYPE_SLOT = 0;
1.57 + static const uint32_t ERROR_REPORT_SLOT = EXNTYPE_SLOT + 1;
1.58 + static const uint32_t FILENAME_SLOT = ERROR_REPORT_SLOT + 1;
1.59 + static const uint32_t LINENUMBER_SLOT = FILENAME_SLOT + 1;
1.60 + static const uint32_t COLUMNNUMBER_SLOT = LINENUMBER_SLOT + 1;
1.61 + static const uint32_t STACK_SLOT = COLUMNNUMBER_SLOT + 1;
1.62 + static const uint32_t MESSAGE_SLOT = STACK_SLOT + 1;
1.63 +
1.64 + static const uint32_t RESERVED_SLOTS = MESSAGE_SLOT + 1;
1.65 +
1.66 + public:
1.67 + static const Class class_;
1.68 +
1.69 + // Create an error of the given type corresponding to the provided location
1.70 + // info. If |message| is non-null, then the error will have a .message
1.71 + // property with that value; otherwise the error will have no .message
1.72 + // property.
1.73 + static ErrorObject *
1.74 + create(JSContext *cx, JSExnType type, HandleString stack, HandleString fileName,
1.75 + uint32_t lineNumber, uint32_t columnNumber, ScopedJSFreePtr<JSErrorReport> *report,
1.76 + HandleString message);
1.77 +
1.78 + JSExnType type() const {
1.79 + return JSExnType(getReservedSlot(EXNTYPE_SLOT).toInt32());
1.80 + }
1.81 +
1.82 + JSErrorReport * getErrorReport() const {
1.83 + const Value &slot = getReservedSlot(ERROR_REPORT_SLOT);
1.84 + if (slot.isUndefined())
1.85 + return nullptr;
1.86 + return static_cast<JSErrorReport*>(slot.toPrivate());
1.87 + }
1.88 +
1.89 + JSErrorReport * getOrCreateErrorReport(JSContext *cx);
1.90 +
1.91 + inline JSString * fileName(JSContext *cx) const;
1.92 + inline uint32_t lineNumber() const;
1.93 + inline uint32_t columnNumber() const;
1.94 + inline JSString * stack(JSContext *cx) const;
1.95 +
1.96 + JSString * getMessage() const {
1.97 + const HeapSlot &slot = getReservedSlotRef(MESSAGE_SLOT);
1.98 + return slot.isString() ? slot.toString() : nullptr;
1.99 + }
1.100 +};
1.101 +
1.102 +} // namespace js
1.103 +
1.104 +#endif // vm_ErrorObject_h_
