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 "allocation.h"
   9 #include "v8globals.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(ArrayLength)                    \
  18   V(FunctionArguments)              \
  19   V(FunctionCaller)                 \
  20   V(FunctionName)                   \
  21   V(FunctionLength)                 \
  22   V(FunctionPrototype)              \
  23   V(ScriptColumnOffset)             \
  24   V(ScriptCompilationType)          \
  25   V(ScriptContextData)              \
  26   V(ScriptEvalFromScript)           \
  27   V(ScriptEvalFromScriptPosition)   \
  28   V(ScriptEvalFromFunctionName)     \
  29   V(ScriptId)                       \
  30   V(ScriptLineEnds)                 \
  31   V(ScriptLineOffset)               \
  32   V(ScriptName)                     \
  33   V(ScriptSource)                   \
  34   V(ScriptType)                     \
  35   V(StringLength)
  36
  37 // Accessors contains all predefined proxy accessors.
  38
  39 class Accessors : public AllStatic {
  40  public:
  41   // Accessor descriptors.
  42 #define ACCESSOR_INFO_DECLARATION(name)                   \
  43   static void name##Getter(                               \
  44       v8::Local<v8::String> name,                         \
  45       const v8::PropertyCallbackInfo<v8::Value>& info);   \
  46   static void name##Setter(                               \
  47       v8::Local<v8::String> name,                         \
  48       v8::Local<v8::Value> value,                         \
  49       const v8::PropertyCallbackInfo<void>& info);   \
  50   static Handle<AccessorInfo> name##Info(                 \
  51       Isolate* isolate,                                   \
  52       PropertyAttributes attributes);
  53   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  54 #undef ACCESSOR_INFO_DECLARATION
  55
  56   enum DescriptorId {
  57 #define ACCESSOR_INFO_DECLARATION(name) \
  58     k##name##Getter, \
  59     k##name##Setter,
  60   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  61 #undef ACCESSOR_INFO_DECLARATION
  62     descriptorCount
  63   };
  64
  65   // Accessor functions called directly from the runtime system.
  66   static Handle<Object> FunctionSetPrototype(Handle<JSFunction> object,
  67                                              Handle<Object> value);
  68   static Handle<Object> FunctionGetPrototype(Handle<JSFunction> object);
  69   static Handle<Object> FunctionGetArguments(Handle<JSFunction> object);
  70
  71   // Accessor infos.
  72   static Handle<AccessorInfo> MakeModuleExport(
  73       Handle<String> name, int index, PropertyAttributes attributes);
  74
  75   // Returns true for properties that are accessors to object fields.
  76   // If true, *object_offset contains offset of object field.
  77   template <class T>
  78   static bool IsJSObjectFieldAccessor(typename T::TypeHandle type,
  79                                       Handle<String> name,
  80                                       int* object_offset);
  81
  82   static Handle<AccessorInfo> MakeAccessor(
  83       Isolate* isolate,
  84       Handle<String> name,
  85       AccessorGetterCallback getter,
  86       AccessorSetterCallback setter,
  87       PropertyAttributes attributes);
  88
  89  private:
  90   // Helper functions.
  91   static Handle<Object> FlattenNumber(Isolate* isolate, Handle<Object> value);
  92 };
  93
  94 } }  // namespace v8::internal
  95
  96 #endif  // V8_ACCESSORS_H_