ipc/param_traits_read_macros.h

   1 // Copyright (c) 2012 The Chromium 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 IPC_PARAM_TRAITS_READ_MACROS_H_
   6 #define IPC_PARAM_TRAITS_READ_MACROS_H_
   7
   8 // Null out all the macros that need nulling.
   9 #include "ipc/ipc_message_null_macros.h"
  10
  11 // STRUCT declarations cause corresponding STRUCT_TRAITS declarations to occur.
  12 #undef IPC_STRUCT_BEGIN_WITH_PARENT
  13 #undef IPC_STRUCT_MEMBER
  14 #undef IPC_STRUCT_END
  15 #define IPC_STRUCT_BEGIN_WITH_PARENT(struct_name, parent) \
  16   IPC_STRUCT_TRAITS_BEGIN(struct_name)
  17 #define IPC_STRUCT_MEMBER(type, name, ...) IPC_STRUCT_TRAITS_MEMBER(name)
  18 #define IPC_STRUCT_END() IPC_STRUCT_TRAITS_END()
  19
  20 // Set up so next include will generate read methods.
  21 #undef IPC_STRUCT_TRAITS_BEGIN
  22 #undef IPC_STRUCT_TRAITS_MEMBER
  23 #undef IPC_STRUCT_TRAITS_PARENT
  24 #undef IPC_STRUCT_TRAITS_END
  25 #define IPC_STRUCT_TRAITS_BEGIN(struct_name) \
  26   bool ParamTraits<struct_name>:: \
  27       Read(const Message* m, base::PickleIterator* iter, param_type* p) { \
  28     return
  29 #define IPC_STRUCT_TRAITS_MEMBER(name) ReadParam(m, iter, &p->name) &&
  30 #define IPC_STRUCT_TRAITS_PARENT(type) ParamTraits<type>::Read(m, iter, p) &&
  31 #define IPC_STRUCT_TRAITS_END() 1; }
  32
  33 #undef IPC_ENUM_TRAITS_VALIDATE
  34 #define IPC_ENUM_TRAITS_VALIDATE(enum_name, validation_expression)    \
  35   bool ParamTraits<enum_name>:: \
  36       Read(const Message* m, base::PickleIterator* iter, param_type* p) { \
  37     int value; \
  38     if (!iter->ReadInt(&value)) \
  39       return false; \
  40     if (!(validation_expression)) \
  41       return false; \
  42     *p = static_cast<param_type>(value); \
  43     return true; \
  44   }
  45
  46 #endif  // IPC_PARAM_TRAITS_READ_MACROS_H_
  47