API/APICast.h

   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/Platform.h>
  33 #include <wtf/UnusedParam.h>
  34
  35 namespace JSC {
  36     class ExecState;
  37     class PropertyNameArray;
  38     class JSGlobalData;
  39     class JSObject;
  40     class JSValue;
  41 }
  42
  43 typedef const struct OpaqueJSContextGroup* JSContextGroupRef;
  44 typedef const struct OpaqueJSContext* JSContextRef;
  45 typedef struct OpaqueJSContext* JSGlobalContextRef;
  46 typedef struct OpaqueJSPropertyNameAccumulator* JSPropertyNameAccumulatorRef;
  47 typedef const struct OpaqueJSValue* JSValueRef;
  48 typedef struct OpaqueJSValue* JSObjectRef;
  49
  50 /* Opaque typing convenience methods */
  51
  52 inline JSC::ExecState* toJS(JSContextRef c)
  53 {
  54     ASSERT(c);
  55     return reinterpret_cast<JSC::ExecState*>(const_cast<OpaqueJSContext*>(c));
  56 }
  57
  58 inline JSC::ExecState* toJS(JSGlobalContextRef c)
  59 {
  60     ASSERT(c);
  61     return reinterpret_cast<JSC::ExecState*>(c);
  62 }
  63
  64 inline JSC::JSValue toJS(JSC::ExecState* exec, JSValueRef v)
  65 {
  66     ASSERT_UNUSED(exec, exec);
  67     ASSERT(v);
  68 #if USE(JSVALUE32_64)
  69     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
  70     if (!jsCell)
  71         return JSC::JSValue();
  72     if (jsCell->isAPIValueWrapper())
  73         return static_cast<JSC::JSAPIValueWrapper*>(jsCell)->value();
  74     return jsCell;
  75 #else
  76     return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
  77 #endif
  78 }
  79
  80 inline JSC::JSValue toJSForGC(JSC::ExecState* exec, JSValueRef v)
  81 {
  82     ASSERT_UNUSED(exec, exec);
  83     ASSERT(v);
  84 #if USE(JSVALUE32_64)
  85     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
  86     if (!jsCell)
  87         return JSC::JSValue();
  88     return jsCell;
  89 #else
  90     return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
  91 #endif
  92 }
  93
  94 inline JSC::JSObject* toJS(JSObjectRef o)
  95 {
  96     return reinterpret_cast<JSC::JSObject*>(o);
  97 }
  98
  99 inline JSC::PropertyNameArray* toJS(JSPropertyNameAccumulatorRef a)
 100 {
 101     return reinterpret_cast<JSC::PropertyNameArray*>(a);
 102 }
 103
 104 inline JSC::JSGlobalData* toJS(JSContextGroupRef g)
 105 {
 106     return reinterpret_cast<JSC::JSGlobalData*>(const_cast<OpaqueJSContextGroup*>(g));
 107 }
 108
 109 inline JSValueRef toRef(JSC::ExecState* exec, JSC::JSValue v)
 110 {
 111 #if USE(JSVALUE32_64)
 112     if (!v)
 113         return 0;
 114     if (!v.isCell())
 115         return reinterpret_cast<JSValueRef>(asCell(JSC::jsAPIValueWrapper(exec, v)));
 116     return reinterpret_cast<JSValueRef>(asCell(v));
 117 #else
 118     UNUSED_PARAM(exec);
 119     return reinterpret_cast<JSValueRef>(JSC::JSValue::encode(v));
 120 #endif
 121 }
 122
 123 inline JSObjectRef toRef(JSC::JSObject* o)
 124 {
 125     return reinterpret_cast<JSObjectRef>(o);
 126 }
 127
 128 inline JSObjectRef toRef(const JSC::JSObject* o)
 129 {
 130     return reinterpret_cast<JSObjectRef>(const_cast<JSC::JSObject*>(o));
 131 }
 132
 133 inline JSContextRef toRef(JSC::ExecState* e)
 134 {
 135     return reinterpret_cast<JSContextRef>(e);
 136 }
 137
 138 inline JSGlobalContextRef toGlobalRef(JSC::ExecState* e)
 139 {
 140     ASSERT(e == e->lexicalGlobalObject()->globalExec());
 141     return reinterpret_cast<JSGlobalContextRef>(e);
 142 }
 143
 144 inline JSPropertyNameAccumulatorRef toRef(JSC::PropertyNameArray* l)
 145 {
 146     return reinterpret_cast<JSPropertyNameAccumulatorRef>(l);
 147 }
 148
 149 inline JSContextGroupRef toRef(JSC::JSGlobalData* g)
 150 {
 151     return reinterpret_cast<JSContextGroupRef>(g);
 152 }
 153
 154 #endif // APICast_h