1 // Copyright 2009 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #ifndef V8_APIUTILS_H_ 29 #define V8_APIUTILS_H_ 30 31 namespace v8 { 32 class ImplementationUtilities { 33 public: 34 static int GetNameCount(ExtensionConfiguration* that) { 35 return that->name_count_; 36 } 37 38 static const char** GetNames(ExtensionConfiguration* that) { 39 return that->names_; 40 } 41 42 // Packs additional parameters for the NewArguments function. |implicit_args| 43 // is a pointer to the last element of 3-elements array controlled by GC. 44 static void PrepareArgumentsData(internal::Object** implicit_args, 45 internal::Object* data, 46 internal::JSFunction* callee, 47 internal::Object* holder) { 48 implicit_args[v8::Arguments::kDataIndex] = data; 49 implicit_args[v8::Arguments::kCalleeIndex] = callee; 50 implicit_args[v8::Arguments::kHolderIndex] = holder; 51 } 52 53 static v8::Arguments NewArguments(internal::Object** implicit_args, 54 internal::Object** argv, int argc, 55 bool is_construct_call) { 56 ASSERT(implicit_args[v8::Arguments::kCalleeIndex]->IsJSFunction()); 57 ASSERT(implicit_args[v8::Arguments::kHolderIndex]->IsHeapObject()); 58 59 return v8::Arguments(implicit_args, argv, argc, is_construct_call); 60 } 61 62 // Introduce an alias for the handle scope data to allow non-friends 63 // to access the HandleScope data. 64 typedef v8::HandleScope::Data HandleScopeData; 65 66 #ifdef DEBUG 67 static void ZapHandleRange(internal::Object** begin, internal::Object** end); 68 #endif 69 }; 70 71 } // namespace v8 72 73 #endif // V8_APIUTILS_H_ 74
