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 "JSCJSValue.h"
  31 #include "JSGlobalObject.h"
  32
  33 namespace JSC {
  34     class ExecState;
  35     class PropertyNameArray;
  36     class VM;
  37     class JSObject;
  38     class JSValue;
  39 }
  40
  41 typedef const struct OpaqueJSContextGroup* JSContextGroupRef;
  42 typedef const struct OpaqueJSContext* JSContextRef;
  43 typedef struct OpaqueJSContext* JSGlobalContextRef;
  44 typedef struct OpaqueJSPropertyNameAccumulator* JSPropertyNameAccumulatorRef;
  45 typedef const struct OpaqueJSValue* JSValueRef;
  46 typedef struct OpaqueJSValue* JSObjectRef;
  47
  48 /* Opaque typing convenience methods */
  49
  50 inline JSC::ExecState* toJS(JSContextRef c)
  51 {
  52     ASSERT(c);
  53     return reinterpret_cast<JSC::ExecState*>(const_cast<OpaqueJSContext*>(c));
  54 }
  55
  56 inline JSC::ExecState* toJS(JSGlobalContextRef c)
  57 {
  58     ASSERT(c);
  59     return reinterpret_cast<JSC::ExecState*>(c);
  60 }
  61
  62 inline JSC::JSValue toJS(JSC::ExecState* exec, JSValueRef v)
  63 {
  64     ASSERT_UNUSED(exec, exec);
  65 #if USE(JSVALUE32_64)
  66     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
  67     if (!jsCell)
  68         return JSC::jsNull();
  69     JSC::JSValue result;
  70     if (jsCell->isAPIValueWrapper())
  71         result = JSC::jsCast<JSC::JSAPIValueWrapper*>(jsCell)->value();
  72     else
  73         result = jsCell;
  74 #else
  75     JSC::JSValue result = JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
  76 #endif
  77     if (!result)
  78         return JSC::jsNull();
  79     if (result.isCell())
  80         RELEASE_ASSERT(result.asCell()->methodTable());
  81     return result;
  82 }
  83
  84 inline JSC::JSValue toJSForGC(JSC::ExecState* exec, JSValueRef v)
  85 {
  86     ASSERT_UNUSED(exec, exec);
  87 #if USE(JSVALUE32_64)
  88     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
  89     if (!jsCell)
  90         return JSC::JSValue();
  91     JSC::JSValue result = jsCell;
  92 #else
  93     JSC::JSValue result = JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
  94 #endif
  95     if (result && result.isCell())
  96         RELEASE_ASSERT(result.asCell()->methodTable());
  97     return result;
  98 }
  99
 100 // Used in JSObjectGetPrivate as that may be called during finalization
 101 inline JSC::JSObject* uncheckedToJS(JSObjectRef o)
 102 {
 103     return reinterpret_cast<JSC::JSObject*>(o);
 104 }
 105
 106 inline JSC::JSObject* toJS(JSObjectRef o)
 107 {
 108     JSC::JSObject* object = uncheckedToJS(o);
 109     if (object)
 110         RELEASE_ASSERT(object->methodTable());
 111     return object;
 112 }
 113
 114 inline JSC::PropertyNameArray* toJS(JSPropertyNameAccumulatorRef a)
 115 {
 116     return reinterpret_cast<JSC::PropertyNameArray*>(a);
 117 }
 118
 119 inline JSC::VM* toJS(JSContextGroupRef g)
 120 {
 121     return reinterpret_cast<JSC::VM*>(const_cast<OpaqueJSContextGroup*>(g));
 122 }
 123
 124 inline JSValueRef toRef(JSC::ExecState* exec, JSC::JSValue v)
 125 {
 126 #if USE(JSVALUE32_64)
 127     if (!v)
 128         return 0;
 129     if (!v.isCell())
 130         return reinterpret_cast<JSValueRef>(JSC::jsAPIValueWrapper(exec, v).asCell());
 131     return reinterpret_cast<JSValueRef>(v.asCell());
 132 #else
 133     UNUSED_PARAM(exec);
 134     return reinterpret_cast<JSValueRef>(JSC::JSValue::encode(v));
 135 #endif
 136 }
 137
 138 inline JSObjectRef toRef(JSC::JSObject* o)
 139 {
 140     return reinterpret_cast<JSObjectRef>(o);
 141 }
 142
 143 inline JSObjectRef toRef(const JSC::JSObject* o)
 144 {
 145     return reinterpret_cast<JSObjectRef>(const_cast<JSC::JSObject*>(o));
 146 }
 147
 148 inline JSContextRef toRef(JSC::ExecState* e)
 149 {
 150     return reinterpret_cast<JSContextRef>(e);
 151 }
 152
 153 inline JSGlobalContextRef toGlobalRef(JSC::ExecState* e)
 154 {
 155     ASSERT(e == e->lexicalGlobalObject()->globalExec());
 156     return reinterpret_cast<JSGlobalContextRef>(e);
 157 }
 158
 159 inline JSPropertyNameAccumulatorRef toRef(JSC::PropertyNameArray* l)
 160 {
 161     return reinterpret_cast<JSPropertyNameAccumulatorRef>(l);
 162 }
 163
 164 inline JSContextGroupRef toRef(JSC::VM* g)
 165 {
 166     return reinterpret_cast<JSContextGroupRef>(g);
 167 }
 168
 169 #endif // APICast_h