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      1 /*
      2  * Copyright (C) 2010 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef NPVariantData_h
     27 #define NPVariantData_h
     28 
     29 #if ENABLE(PLUGIN_PROCESS)
     30 
     31 #include <wtf/text/CString.h>
     32 
     33 namespace CoreIPC {
     34     class ArgumentDecoder;
     35     class ArgumentEncoder;
     36 }
     37 
     38 namespace WebKit {
     39 
     40 // The CoreIPC representation of an NPVariant.
     41 
     42 class NPVariantData {
     43 public:
     44     enum Type {
     45         Void,
     46         Null,
     47         Bool,
     48         Int32,
     49         Double,
     50         String,
     51         LocalNPObjectID,
     52         RemoteNPObjectID,
     53     };
     54     NPVariantData();
     55 
     56     static NPVariantData makeVoid();
     57     static NPVariantData makeNull();
     58     static NPVariantData makeBool(bool value);
     59     static NPVariantData makeInt32(int32_t value);
     60     static NPVariantData makeDouble(double value);
     61     static NPVariantData makeString(const char* string, unsigned length);
     62     static NPVariantData makeLocalNPObjectID(uint64_t value);
     63     static NPVariantData makeRemoteNPObjectID(uint64_t value);
     64 
     65     Type type() const { return static_cast<Type>(m_type); }
     66 
     67     bool boolValue() const
     68     {
     69         ASSERT(type() == NPVariantData::Bool);
     70         return m_boolValue;
     71     }
     72 
     73     int32_t int32Value() const
     74     {
     75         ASSERT(type() == NPVariantData::Int32);
     76         return m_int32Value;
     77     }
     78 
     79     double doubleValue() const
     80     {
     81         ASSERT(type() == NPVariantData::Double);
     82         return m_doubleValue;
     83     }
     84 
     85     const CString& stringValue() const
     86     {
     87         ASSERT(type() == NPVariantData::String);
     88         return m_stringValue;
     89     }
     90 
     91     uint64_t localNPObjectIDValue() const
     92     {
     93         ASSERT(type() == NPVariantData::LocalNPObjectID);
     94         return m_localNPObjectIDValue;
     95     }
     96 
     97     uint64_t remoteNPObjectIDValue() const
     98     {
     99         ASSERT(type() == NPVariantData::RemoteNPObjectID);
    100         return m_remoteNPObjectIDValue;
    101     }
    102 
    103     void encode(CoreIPC::ArgumentEncoder*) const;
    104     static bool decode(CoreIPC::ArgumentDecoder*, NPVariantData&);
    105 
    106 private:
    107     uint32_t m_type;
    108     bool m_boolValue;
    109     int32_t m_int32Value;
    110     double m_doubleValue;
    111     CString m_stringValue;
    112     uint64_t m_localNPObjectIDValue;
    113     uint64_t m_remoteNPObjectIDValue;
    114 };
    115 
    116 } // namespace WebKit
    117 
    118 #endif // ENABLE(PLUGIN_PROCESS)
    119 
    120 #endif // NPVariantData_h
    121