src/v8/src/accessors.h

   1 // Copyright 2012 the V8 project authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef V8_ACCESSORS_H_
   6 #define V8_ACCESSORS_H_
   7
   8 #include "src/allocation.h"
   9 #include "src/globals.h"
  10
  11 namespace v8 {
  12 namespace internal {
  13
  14 // The list of accessor descriptors. This is a second-order macro
  15 // taking a macro to be applied to all accessor descriptor names.
  16 #define ACCESSOR_INFO_LIST(V)     \
  17   V(ArgumentsIterator)            \
  18   V(ArrayLength)                  \
  19   V(FunctionArguments)            \
  20   V(FunctionCaller)               \
  21   V(FunctionName)                 \
  22   V(FunctionLength)               \
  23   V(FunctionPrototype)            \
  24   V(ScriptColumnOffset)           \
  25   V(ScriptCompilationType)        \
  26   V(ScriptContextData)            \
  27   V(ScriptEvalFromScript)         \
  28   V(ScriptEvalFromScriptPosition) \
  29   V(ScriptEvalFromFunctionName)   \
  30   V(ScriptId)                     \
  31   V(ScriptLineEnds)               \
  32   V(ScriptLineOffset)             \
  33   V(ScriptName)                   \
  34   V(ScriptSource)                 \
  35   V(ScriptType)                   \
  36   V(ScriptSourceUrl)              \
  37   V(ScriptSourceMappingUrl)       \
  38   V(StringLength)
  39
  40 // Accessors contains all predefined proxy accessors.
  41
  42 class Accessors : public AllStatic {
  43  public:
  44   // Accessor descriptors.
  45 #define ACCESSOR_INFO_DECLARATION(name)                   \
  46   static void name##Getter(                               \
  47       v8::Local<v8::Name> name,                           \
  48       const v8::PropertyCallbackInfo<v8::Value>& info);   \
  49   static void name##Setter(                               \
  50       v8::Local<v8::Name> name,                           \
  51       v8::Local<v8::Value> value,                         \
  52       const v8::PropertyCallbackInfo<void>& info);   \
  53   static Handle<AccessorInfo> name##Info(                 \
  54       Isolate* isolate,                                   \
  55       PropertyAttributes attributes);
  56   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  57 #undef ACCESSOR_INFO_DECLARATION
  58
  59   enum DescriptorId {
  60 #define ACCESSOR_INFO_DECLARATION(name) \
  61     k##name##Getter, \
  62     k##name##Setter,
  63   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  64 #undef ACCESSOR_INFO_DECLARATION
  65     descriptorCount
  66   };
  67
  68   // Accessor functions called directly from the runtime system.
  69   static Handle<Object> FunctionSetPrototype(Handle<JSFunction> object,
  70                                              Handle<Object> value);
  71   static Handle<Object> FunctionGetPrototype(Handle<JSFunction> object);
  72   static Handle<Object> FunctionGetArguments(Handle<JSFunction> object);
  73
  74   // Accessor infos.
  75   static Handle<AccessorInfo> MakeModuleExport(
  76       Handle<String> name, int index, PropertyAttributes attributes);
  77
  78   // Returns true for properties that are accessors to object fields.
  79   // If true, *object_offset contains offset of object field.
  80   template <class T>
  81   static bool IsJSObjectFieldAccessor(typename T::TypeHandle type,
  82                                       Handle<Name> name,
  83                                       int* object_offset);
  84
  85   static Handle<AccessorInfo> MakeAccessor(
  86       Isolate* isolate,
  87       Handle<Name> name,
  88       AccessorNameGetterCallback getter,
  89       AccessorNameSetterCallback setter,
  90       PropertyAttributes attributes);
  91
  92   static Handle<ExecutableAccessorInfo> CloneAccessor(
  93       Isolate* isolate,
  94       Handle<ExecutableAccessorInfo> accessor);
  95
  96
  97  private:
  98   // Helper functions.
  99   static Handle<Object> FlattenNumber(Isolate* isolate, Handle<Object> value);
 100 };
 101
 102 } }  // namespace v8::internal
 103
 104 #endif  // V8_ACCESSORS_H_