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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/proxy/ppapi_param_traits.h"
#include <string.h> // For memcpy
#include "ppapi/proxy/serialized_var.h"
namespace IPC {
// static
void ParamTraits<PP_InputEvent>::Write(Message* m, const param_type& p) {
// PP_InputEvent is just POD so we can just memcpy it.
m->WriteData(reinterpret_cast<const char*>(&p), sizeof(PP_InputEvent));
}
// static
bool ParamTraits<PP_InputEvent>::Read(const Message* m,
void** iter,
param_type* r) {
const char* data;
int data_size;
if (!m->ReadData(iter, &data, &data_size))
return false;
memcpy(r, data, sizeof(PP_InputEvent));
return true;
}
// static
void ParamTraits<PP_InputEvent>::Log(const param_type& p, std::string* l) {
}
// PP_ObjectProperty -----------------------------------------------------------
// static
void ParamTraits<PP_ObjectProperty>::Write(Message* m, const param_type& p) {
// FIXME(brettw);
}
// static
bool ParamTraits<PP_ObjectProperty>::Read(const Message* m,
void** iter,
param_type* r) {
// FIXME(brettw);
return true;
}
// static
void ParamTraits<PP_ObjectProperty>::Log(const param_type& p, std::string* l) {
}
// PP_Point --------------------------------------------------------------------
// static
void ParamTraits<PP_Point>::Write(Message* m, const param_type& p) {
m->WriteInt(p.x);
m->WriteInt(p.y);
}
// static
bool ParamTraits<PP_Point>::Read(const Message* m, void** iter, param_type* r) {
return m->ReadInt(iter, &r->x) && !m->ReadInt(iter, &r->y);
}
// static
void ParamTraits<PP_Point>::Log(const param_type& p, std::string* l) {
}
// PP_Rect ---------------------------------------------------------------------
// static
void ParamTraits<PP_Rect>::Write(Message* m, const param_type& p) {
m->WriteInt(p.point.x);
m->WriteInt(p.point.y);
m->WriteInt(p.size.width);
m->WriteInt(p.size.height);
}
// static
bool ParamTraits<PP_Rect>::Read(const Message* m,
void** iter,
param_type* r) {
if (!m->ReadInt(iter, &r->point.x) ||
!m->ReadInt(iter, &r->point.y) ||
!m->ReadInt(iter, &r->size.width) ||
!m->ReadInt(iter, &r->size.height))
return false;
return true;
}
// static
void ParamTraits<PP_Rect>::Log(const param_type& p, std::string* l) {
}
// PP_Size ---------------------------------------------------------------------
// static
void ParamTraits<PP_Size>::Write(Message* m, const param_type& p) {
m->WriteInt(p.width);
m->WriteInt(p.height);
}
// static
bool ParamTraits<PP_Size>::Read(const Message* m, void** iter, param_type* r) {
return m->ReadInt(iter, &r->width) && m->ReadInt(iter, &r->height);
}
// static
void ParamTraits<PP_Size>::Log(const param_type& p, std::string* l) {
}
// SerializedVar ---------------------------------------------------------------
// static
void ParamTraits<pp::proxy::SerializedVar>::Write(Message* m,
const param_type& p) {
p.WriteToMessage(m);
}
// static
bool ParamTraits<pp::proxy::SerializedVar>::Read(const Message* m,
void** iter,
param_type* r) {
return r->ReadFromMessage(m, iter);
}
// static
void ParamTraits<pp::proxy::SerializedVar>::Log(const param_type& p,
std::string* l) {
}
// std::vector<SerializedVar> --------------------------------------------------
void ParamTraits< std::vector<pp::proxy::SerializedVar> >::Write(
Message* m,
const param_type& p) {
WriteParam(m, static_cast<int>(p.size()));
for (size_t i = 0; i < p.size(); i++)
WriteParam(m, p[i]);
}
// static
bool ParamTraits< std::vector<pp::proxy::SerializedVar> >::Read(
const Message* m,
void** iter,
param_type* r) {
// This part is just a copy of the the default ParamTraits vector Read().
int size;
// ReadLength() checks for < 0 itself.
if (!m->ReadLength(iter, &size))
return false;
// Resizing beforehand is not safe, see BUG 1006367 for details.
if (INT_MAX / sizeof(pp::proxy::SerializedVar) <= static_cast<size_t>(size))
return false;
// The default vector deserializer does resize here and then we deserialize
// into those allocated slots. However, the implementation of vector (at
// least in GCC's implementation), creates a new empty object using the
// default constructor, and then sets the rest of the items to that empty
// one using the copy constructor.
//
// Since we allocate the inner class when you call the default constructor
// and transfer the inner class when you do operator=, the entire vector
// will end up referring to the same inner class. Deserializing into this
// will just end up overwriting the same item over and over, since all the
// SerializedVars will refer to the same thing.
//
// The solution is to make a new SerializedVar for each deserialized item,
// and then add it to the vector one at a time. Our copies are efficient so
// this is no big deal.
r->reserve(size);
for (int i = 0; i < size; i++) {
pp::proxy::SerializedVar var;
if (!ReadParam(m, iter, &var))
return false;
r->push_back(var);
}
return true;
}
// static
void ParamTraits< std::vector<pp::proxy::SerializedVar> >::Log(
const param_type& p,
std::string* l) {
}
} // namespace IPC
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