1 /*

     2  * Copyright (C) 2006 Apple Computer, 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 COMPUTER, INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #ifndef APICast_h

    27 #define APICast_h

    28 

    29 #include "JSAPIValueWrapper.h"

    30 #include "JSGlobalObject.h"

    31 #include "JSValue.h"

    32 #include <wtf/UnusedParam.h>

    33 

    34 namespace JSC {

    35     class ExecState;

    36     class PropertyNameArray;

    37     class JSGlobalData;

    38     class JSObject;

    39     class JSValue;

    40 }

    41 

    42 typedef const struct OpaqueJSContextGroup* JSContextGroupRef;

    43 typedef const struct OpaqueJSContext* JSContextRef;

    44 typedef struct OpaqueJSContext* JSGlobalContextRef;

    45 typedef struct OpaqueJSPropertyNameAccumulator* JSPropertyNameAccumulatorRef;

    46 typedef const struct OpaqueJSValue* JSValueRef;

    47 typedef struct OpaqueJSValue* JSObjectRef;

    48 

    49 /* Opaque typing convenience methods */

    50 

    51 inline JSC::ExecState* toJS(JSContextRef c)

    52 {

    53     ASSERT(c);

    54     return reinterpret_cast<JSC::ExecState*>(const_cast<OpaqueJSContext*>(c));

    55 }

    56 

    57 inline JSC::ExecState* toJS(JSGlobalContextRef c)

    58 {

    59     ASSERT(c);

    60     return reinterpret_cast<JSC::ExecState*>(c);

    61 }

    62 

    63 inline JSC::JSValue toJS(JSC::ExecState* exec, JSValueRef v)

    64 {

    65     ASSERT_UNUSED(exec, exec);

    66     ASSERT(v);

    67 #if USE(JSVALUE32_64)

    68     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));

    69     if (!jsCell)

    70         return JSC::JSValue();

    71     if (jsCell->isAPIValueWrapper())

    72         return static_cast<JSC::JSAPIValueWrapper*>(jsCell)->value();

    73     return jsCell;

    74 #else

    75     return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));

    76 #endif

    77 }

    78 

    79 inline JSC::JSValue toJSForGC(JSC::ExecState* exec, JSValueRef v)

    80 {

    81     ASSERT_UNUSED(exec, exec);

    82     ASSERT(v);

    83 #if USE(JSVALUE32_64)

    84     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));

    85     if (!jsCell)

    86         return JSC::JSValue();

    87     return jsCell;

    88 #else

    89     return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));

    90 #endif

    91 }

    92 

    93 inline JSC::JSObject* toJS(JSObjectRef o)

    94 {

    95     return reinterpret_cast<JSC::JSObject*>(o);

    96 }

    97 

    98 inline JSC::PropertyNameArray* toJS(JSPropertyNameAccumulatorRef a)

    99 {

   100     return reinterpret_cast<JSC::PropertyNameArray*>(a);

   101 }

   102 

   103 inline JSC::JSGlobalData* toJS(JSContextGroupRef g)

   104 {

   105     return reinterpret_cast<JSC::JSGlobalData*>(const_cast<OpaqueJSContextGroup*>(g));

   106 }

   107 

   108 inline JSValueRef toRef(JSC::ExecState* exec, JSC::JSValue v)

   109 {

   110 #if USE(JSVALUE32_64)

   111     if (!v)

   112         return 0;

   113     if (!v.isCell())

   114         return reinterpret_cast<JSValueRef>(asCell(JSC::jsAPIValueWrapper(exec, v)));

   115     return reinterpret_cast<JSValueRef>(asCell(v));

   116 #else

   117     UNUSED_PARAM(exec);

   118     return reinterpret_cast<JSValueRef>(JSC::JSValue::encode(v));

   119 #endif

   120 }

   121 

   122 inline JSObjectRef toRef(JSC::JSObject* o)

   123 {

   124     return reinterpret_cast<JSObjectRef>(o);

   125 }

   126 

   127 inline JSObjectRef toRef(const JSC::JSObject* o)

   128 {

   129     return reinterpret_cast<JSObjectRef>(const_cast<JSC::JSObject*>(o));

   130 }

   131 

   132 inline JSContextRef toRef(JSC::ExecState* e)

   133 {

   134     return reinterpret_cast<JSContextRef>(e);

   135 }

   136 

   137 inline JSGlobalContextRef toGlobalRef(JSC::ExecState* e)

   138 {

   139     ASSERT(e == e->lexicalGlobalObject()->globalExec());

   140     return reinterpret_cast<JSGlobalContextRef>(e);

   141 }

   142 

   143 inline JSPropertyNameAccumulatorRef toRef(JSC::PropertyNameArray* l)

   144 {

   145     return reinterpret_cast<JSPropertyNameAccumulatorRef>(l);

   146 }

   147 

   148 inline JSContextGroupRef toRef(JSC::JSGlobalData* g)

   149 {

   150     return reinterpret_cast<JSContextGroupRef>(g);

   151 }

   152 

   153 #endif // APICast_h