| /* |
| * Copyright (C) 2012 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef ResolveGlobalStatus_h |
| #define ResolveGlobalStatus_h |
| |
| #include "JSValue.h" |
| #include "PropertyOffset.h" |
| #include <wtf/NotFound.h> |
| |
| namespace JSC { |
| |
| class CodeBlock; |
| class Identifier; |
| struct ResolveOperation; |
| class Structure; |
| |
| class ResolveGlobalStatus { |
| public: |
| enum State { |
| NoInformation, |
| Simple, |
| TakesSlowPath |
| }; |
| |
| ResolveGlobalStatus() |
| : m_state(NoInformation) |
| , m_structure(0) |
| , m_offset(invalidOffset) |
| { |
| } |
| |
| ResolveGlobalStatus( |
| State state, Structure* structure = 0, PropertyOffset offset = invalidOffset, |
| JSValue specificValue = JSValue()) |
| : m_state(state) |
| , m_structure(structure) |
| , m_offset(offset) |
| , m_specificValue(specificValue) |
| { |
| } |
| |
| static ResolveGlobalStatus computeFor(CodeBlock*, int bytecodeIndex, ResolveOperation*, Identifier&); |
| |
| State state() const { return m_state; } |
| |
| bool isSet() const { return m_state != NoInformation; } |
| bool operator!() const { return !isSet(); } |
| bool isSimple() const { return m_state == Simple; } |
| bool takesSlowPath() const { return m_state == TakesSlowPath; } |
| |
| Structure* structure() const { return m_structure; } |
| PropertyOffset offset() const { return m_offset; } |
| JSValue specificValue() const { return m_specificValue; } |
| |
| private: |
| State m_state; |
| Structure* m_structure; |
| PropertyOffset m_offset; |
| JSValue m_specificValue; |
| }; // class ResolveGlobalStatus |
| |
| } // namespace JSC |
| |
| #endif // ResolveGlobalStatus_h |
| |