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 "JSValue.h"
  31 #include <wtf/Platform.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     return reinterpret_cast<JSC::ExecState*>(const_cast<OpaqueJSContext*>(c));
  54 }
  55
  56 inline JSC::ExecState* toJS(JSGlobalContextRef c)
  57 {
  58     return reinterpret_cast<JSC::ExecState*>(c);
  59 }
  60
  61 inline JSC::JSValue toJS(JSC::ExecState*, JSValueRef v)
  62 {
  63 #if USE(JSVALUE32_64)
  64     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
  65     if (!jsCell)
  66         return JSC::JSValue();
  67     if (jsCell->isAPIValueWrapper())
  68         return static_cast<JSC::JSAPIValueWrapper*>(jsCell)->value();
  69     return jsCell;
  70 #else
  71     return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
  72 #endif
  73 }
  74
  75 inline JSC::JSObject* toJS(JSObjectRef o)
  76 {
  77     return reinterpret_cast<JSC::JSObject*>(o);
  78 }
  79
  80 inline JSC::PropertyNameArray* toJS(JSPropertyNameAccumulatorRef a)
  81 {
  82     return reinterpret_cast<JSC::PropertyNameArray*>(a);
  83 }
  84
  85 inline JSC::JSGlobalData* toJS(JSContextGroupRef g)
  86 {
  87     return reinterpret_cast<JSC::JSGlobalData*>(const_cast<OpaqueJSContextGroup*>(g));
  88 }
  89
  90 inline JSValueRef toRef(JSC::ExecState* exec, JSC::JSValue v)
  91 {
  92 #if USE(JSVALUE32_64)
  93     if (!v)
  94         return 0;
  95     if (!v.isCell())
  96         return reinterpret_cast<JSValueRef>(asCell(JSC::jsAPIValueWrapper(exec, v)));
  97     return reinterpret_cast<JSValueRef>(asCell(v));
  98 #else
  99     UNUSED_PARAM(exec);
 100     return reinterpret_cast<JSValueRef>(JSC::JSValue::encode(v));
 101 #endif
 102 }
 103
 104 inline JSObjectRef toRef(JSC::JSObject* o)
 105 {
 106     return reinterpret_cast<JSObjectRef>(o);
 107 }
 108
 109 inline JSObjectRef toRef(const JSC::JSObject* o)
 110 {
 111     return reinterpret_cast<JSObjectRef>(const_cast<JSC::JSObject*>(o));
 112 }
 113
 114 inline JSContextRef toRef(JSC::ExecState* e)
 115 {
 116     return reinterpret_cast<JSContextRef>(e);
 117 }
 118
 119 inline JSGlobalContextRef toGlobalRef(JSC::ExecState* e)
 120 {
 121     return reinterpret_cast<JSGlobalContextRef>(e);
 122 }
 123
 124 inline JSPropertyNameAccumulatorRef toRef(JSC::PropertyNameArray* l)
 125 {
 126     return reinterpret_cast<JSPropertyNameAccumulatorRef>(l);
 127 }
 128
 129 inline JSContextGroupRef toRef(JSC::JSGlobalData* g)
 130 {
 131     return reinterpret_cast<JSContextGroupRef>(g);
 132 }
 133
 134 #endif // APICast_h