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gecko-dev/ipc/glue/IPCMessageUtils.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla IPC.
*
* The Initial Developer of the Original Code is
* Ben Turner <bent.mozilla@gmail.com>.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef __IPC_GLUE_IPCMESSAGEUTILS_H__
#define __IPC_GLUE_IPCMESSAGEUTILS_H__
#include "chrome/common/ipc_message_utils.h"
#include "prtypes.h"
#include "nsID.h"
#include "nsMemory.h"
#include "nsStringGlue.h"
#include "nsTArray.h"
#include "gfx3DMatrix.h"
#include "gfxColor.h"
#include "gfxMatrix.h"
#include "gfxPattern.h"
#include "nsRect.h"
#include "nsRegion.h"
#include "gfxASurface.h"
#include "Layers.h"
#ifdef _MSC_VER
#pragma warning( disable : 4800 )
#endif
#if !defined(OS_POSIX)
// This condition must be kept in sync with the one in
// ipc_message_utils.h, but this dummy definition of
// base::FileDescriptor acts as a static assert that we only get one
// def or the other (or neither, in which case code using
// FileDescriptor fails to build)
namespace base { class FileDescriptor { }; }
#endif
using mozilla::layers::LayerManager;
namespace mozilla {
typedef gfxPattern::GraphicsFilter GraphicsFilterType;
typedef gfxASurface::gfxSurfaceType gfxSurfaceType;
typedef LayerManager::LayersBackend LayersBackend;
typedef gfxASurface::gfxImageFormat PixelFormat;
// This is a cross-platform approximation to HANDLE, which we expect
// to be typedef'd to void* or thereabouts.
typedef uintptr_t WindowsHandle;
// XXX there are out of place and might be generally useful. Could
// move to nscore.h or something.
struct void_t {
bool operator==(const void_t&) const { return true; }
};
struct null_t {
bool operator==(const null_t&) const { return true; }
};
} // namespace mozilla
namespace IPC {
template<>
struct ParamTraits<PRInt8>
{
typedef PRInt8 paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
aMsg->WriteBytes(&aParam, sizeof(aParam));
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
const char* outp;
if (!aMsg->ReadBytes(aIter, &outp, sizeof(*aResult)))
return false;
*aResult = *reinterpret_cast<const paramType*>(outp);
return true;
}
};
template<>
struct ParamTraits<PRUint8>
{
typedef PRUint8 paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
aMsg->WriteBytes(&aParam, sizeof(aParam));
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
const char* outp;
if (!aMsg->ReadBytes(aIter, &outp, sizeof(*aResult)))
return false;
*aResult = *reinterpret_cast<const paramType*>(outp);
return true;
}
};
#if !defined(OS_POSIX)
// See above re: keeping definitions in sync
template<>
struct ParamTraits<base::FileDescriptor>
{
typedef base::FileDescriptor paramType;
static void Write(Message* aMsg, const paramType& aParam) {
NS_RUNTIMEABORT("FileDescriptor isn't meaningful on this platform");
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult) {
NS_RUNTIMEABORT("FileDescriptor isn't meaningful on this platform");
return false;
}
};
#endif // !defined(OS_POSIX)
template <>
struct ParamTraits<nsACString>
{
typedef nsACString paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
bool isVoid = aParam.IsVoid();
aMsg->WriteBool(isVoid);
if (isVoid)
// represents a NULL pointer
return;
PRUint32 length = aParam.Length();
WriteParam(aMsg, length);
aMsg->WriteBytes(aParam.BeginReading(), length);
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
bool isVoid;
if (!aMsg->ReadBool(aIter, &isVoid))
return false;
if (isVoid) {
aResult->SetIsVoid(PR_TRUE);
return true;
}
PRUint32 length;
if (ReadParam(aMsg, aIter, &length)) {
const char* buf;
if (aMsg->ReadBytes(aIter, &buf, length)) {
aResult->Assign(buf, length);
return true;
}
}
return false;
}
static void Log(const paramType& aParam, std::wstring* aLog)
{
if (aParam.IsVoid())
aLog->append(L"(NULL)");
else
aLog->append(UTF8ToWide(aParam.BeginReading()));
}
};
template <>
struct ParamTraits<nsAString>
{
typedef nsAString paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
bool isVoid = aParam.IsVoid();
aMsg->WriteBool(isVoid);
if (isVoid)
// represents a NULL pointer
return;
PRUint32 length = aParam.Length();
WriteParam(aMsg, length);
aMsg->WriteBytes(aParam.BeginReading(), length * sizeof(PRUnichar));
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
bool isVoid;
if (!aMsg->ReadBool(aIter, &isVoid))
return false;
if (isVoid) {
aResult->SetIsVoid(PR_TRUE);
return true;
}
PRUint32 length;
if (ReadParam(aMsg, aIter, &length)) {
const PRUnichar* buf;
if (aMsg->ReadBytes(aIter, reinterpret_cast<const char**>(&buf),
length * sizeof(PRUnichar))) {
aResult->Assign(buf, length);
return true;
}
}
return false;
}
static void Log(const paramType& aParam, std::wstring* aLog)
{
if (aParam.IsVoid())
aLog->append(L"(NULL)");
else {
#ifdef WCHAR_T_IS_UTF16
aLog->append(reinterpret_cast<const wchar_t*>(aParam.BeginReading()));
#else
PRUint32 length = aParam.Length();
for (PRUint32 index = 0; index < length; index++) {
aLog->push_back(std::wstring::value_type(aParam[index]));
}
#endif
}
}
};
template <>
struct ParamTraits<nsCString> : ParamTraits<nsACString>
{
typedef nsCString paramType;
};
#ifdef MOZILLA_INTERNAL_API
template<>
struct ParamTraits<nsCAutoString> : ParamTraits<nsCString>
{
typedef nsCAutoString paramType;
};
#endif // MOZILLA_INTERNAL_API
template <>
struct ParamTraits<nsString> : ParamTraits<nsAString>
{
typedef nsString paramType;
};
template <typename E, class A>
struct ParamTraits<nsTArray<E, A> >
{
typedef nsTArray<E, A> paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
PRUint32 length = aParam.Length();
WriteParam(aMsg, length);
for (PRUint32 index = 0; index < length; index++) {
WriteParam(aMsg, aParam[index]);
}
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
PRUint32 length;
if (!ReadParam(aMsg, aIter, &length)) {
return false;
}
aResult->SetCapacity(length);
for (PRUint32 index = 0; index < length; index++) {
E* element = aResult->AppendElement();
if (!(element && ReadParam(aMsg, aIter, element))) {
return false;
}
}
return true;
}
static void Log(const paramType& aParam, std::wstring* aLog)
{
for (PRUint32 index = 0; index < aParam.Length(); index++) {
if (index) {
aLog->append(L" ");
}
LogParam(aParam[index], aLog);
}
}
};
template<typename E>
struct ParamTraits<InfallibleTArray<E> > :
ParamTraits<nsTArray<E, nsTArrayInfallibleAllocator> >
{
typedef InfallibleTArray<E> paramType;
// use nsTArray Write() method
// deserialize the array fallibly, but return an InfallibleTArray
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
nsTArray<E> temp;
if (!ReadParam(aMsg, aIter, &temp))
return false;
aResult->SwapElements(temp);
return true;
}
// use nsTArray Log() method
};
template<>
struct ParamTraits<float>
{
typedef float paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
aMsg->WriteBytes(&aParam, sizeof(paramType));
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
const char* outFloat;
if (!aMsg->ReadBytes(aIter, &outFloat, sizeof(float)))
return false;
*aResult = *reinterpret_cast<const float*>(outFloat);
return true;
}
static void Log(const paramType& aParam, std::wstring* aLog)
{
aLog->append(StringPrintf(L"%g", aParam));
}
};
template<>
struct ParamTraits<gfxMatrix>
{
typedef gfxMatrix paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
WriteParam(aMsg, aParam.xx);
WriteParam(aMsg, aParam.xy);
WriteParam(aMsg, aParam.yx);
WriteParam(aMsg, aParam.yy);
WriteParam(aMsg, aParam.x0);
WriteParam(aMsg, aParam.y0);
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
if (ReadParam(aMsg, aIter, &aResult->xx) &&
ReadParam(aMsg, aIter, &aResult->xy) &&
ReadParam(aMsg, aIter, &aResult->yx) &&
ReadParam(aMsg, aIter, &aResult->yy) &&
ReadParam(aMsg, aIter, &aResult->x0) &&
ReadParam(aMsg, aIter, &aResult->y0))
return true;
return false;
}
static void Log(const paramType& aParam, std::wstring* aLog)
{
aLog->append(StringPrintf(L"[[%g %g] [%g %g] [%g %g]]", aParam.xx, aParam.xy, aParam.yx, aParam.yy,
aParam.x0, aParam.y0));
}
};
template<>
struct ParamTraits<gfx3DMatrix>
{
typedef gfx3DMatrix paramType;
static void Write(Message* msg, const paramType& param)
{
#define Wr(_f) WriteParam(msg, param. _f)
Wr(_11); Wr(_12); Wr(_13); Wr(_14);
Wr(_21); Wr(_22); Wr(_23); Wr(_24);
Wr(_31); Wr(_32); Wr(_33); Wr(_34);
Wr(_41); Wr(_42); Wr(_43); Wr(_44);
#undef Wr
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
#define Rd(_f) ReadParam(msg, iter, &result-> _f)
return (Rd(_11) && Rd(_12) && Rd(_13) && Rd(_14) &&
Rd(_21) && Rd(_22) && Rd(_23) && Rd(_24) &&
Rd(_31) && Rd(_32) && Rd(_33) && Rd(_34) &&
Rd(_41) && Rd(_42) && Rd(_43) && Rd(_44));
#undef Rd
}
};
template<>
struct ParamTraits<mozilla::GraphicsFilterType>
{
typedef mozilla::GraphicsFilterType paramType;
static void Write(Message* msg, const paramType& param)
{
switch (param) {
case gfxPattern::FILTER_FAST:
case gfxPattern::FILTER_GOOD:
case gfxPattern::FILTER_BEST:
case gfxPattern::FILTER_NEAREST:
case gfxPattern::FILTER_BILINEAR:
case gfxPattern::FILTER_GAUSSIAN:
WriteParam(msg, int32(param));
return;
default:
NS_RUNTIMEABORT("not reached");
return;
}
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
int32 filter;
if (!ReadParam(msg, iter, &filter))
return false;
switch (filter) {
case gfxPattern::FILTER_FAST:
case gfxPattern::FILTER_GOOD:
case gfxPattern::FILTER_BEST:
case gfxPattern::FILTER_NEAREST:
case gfxPattern::FILTER_BILINEAR:
case gfxPattern::FILTER_GAUSSIAN:
*result = paramType(filter);
return true;
default:
return false;
}
}
};
template<>
struct ParamTraits<mozilla::gfxSurfaceType>
{
typedef mozilla::gfxSurfaceType paramType;
static void Write(Message* msg, const paramType& param)
{
if (gfxASurface::SurfaceTypeImage <= param &&
param < gfxASurface::SurfaceTypeMax) {
WriteParam(msg, int32(param));
return;
}
NS_RUNTIMEABORT("surface type not reached");
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
int32 filter;
if (!ReadParam(msg, iter, &filter))
return false;
if (gfxASurface::SurfaceTypeImage <= filter &&
filter < gfxASurface::SurfaceTypeMax) {
*result = paramType(filter);
return true;
}
return false;
}
};
template<>
struct ParamTraits<mozilla::LayersBackend>
{
typedef mozilla::LayersBackend paramType;
static void Write(Message* msg, const paramType& param)
{
if (LayerManager::LAYERS_NONE <= param &&
param < LayerManager::LAYERS_LAST) {
WriteParam(msg, int32(param));
return;
}
NS_RUNTIMEABORT("backend type not reached");
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
int32 type;
if (!ReadParam(msg, iter, &type))
return false;
if (LayerManager::LAYERS_NONE <= type &&
type < LayerManager::LAYERS_LAST) {
*result = paramType(type);
return true;
}
return false;
}
};
template<>
struct ParamTraits<mozilla::PixelFormat>
{
typedef mozilla::PixelFormat paramType;
static bool IsLegalPixelFormat(const paramType& format)
{
return (gfxASurface::ImageFormatARGB32 <= format &&
format < gfxASurface::ImageFormatUnknown);
}
static void Write(Message* msg, const paramType& param)
{
if (!IsLegalPixelFormat(param)) {
NS_RUNTIMEABORT("Unknown pixel format");
}
WriteParam(msg, int32(param));
return;
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
int32 format;
if (!ReadParam(msg, iter, &format) ||
!IsLegalPixelFormat(paramType(format))) {
return false;
}
*result = paramType(format);
return true;
}
};
template<>
struct ParamTraits<gfxRGBA>
{
typedef gfxRGBA paramType;
static void Write(Message* msg, const paramType& param)
{
WriteParam(msg, param.r);
WriteParam(msg, param.g);
WriteParam(msg, param.b);
WriteParam(msg, param.a);
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
return (ReadParam(msg, iter, &result->r) &&
ReadParam(msg, iter, &result->g) &&
ReadParam(msg, iter, &result->b) &&
ReadParam(msg, iter, &result->a));
}
};
template<>
struct ParamTraits<mozilla::void_t>
{
typedef mozilla::void_t paramType;
static void Write(Message* aMsg, const paramType& aParam) { }
static bool
Read(const Message* aMsg, void** aIter, paramType* aResult)
{
*aResult = paramType();
return true;
}
};
template<>
struct ParamTraits<mozilla::null_t>
{
typedef mozilla::null_t paramType;
static void Write(Message* aMsg, const paramType& aParam) { }
static bool
Read(const Message* aMsg, void** aIter, paramType* aResult)
{
*aResult = paramType();
return true;
}
};
template<>
struct ParamTraits<nsIntPoint>
{
typedef nsIntPoint paramType;
static void Write(Message* msg, const paramType& param)
{
WriteParam(msg, param.x);
WriteParam(msg, param.y);
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
return (ReadParam(msg, iter, &result->x) &&
ReadParam(msg, iter, &result->y));
}
};
template<>
struct ParamTraits<nsIntRect>
{
typedef nsIntRect paramType;
static void Write(Message* msg, const paramType& param)
{
WriteParam(msg, param.x);
WriteParam(msg, param.y);
WriteParam(msg, param.width);
WriteParam(msg, param.height);
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
return (ReadParam(msg, iter, &result->x) &&
ReadParam(msg, iter, &result->y) &&
ReadParam(msg, iter, &result->width) &&
ReadParam(msg, iter, &result->height));
}
};
template<>
struct ParamTraits<nsIntRegion>
{
typedef nsIntRegion paramType;
static void Write(Message* msg, const paramType& param)
{
nsIntRegionRectIterator it(param);
while (const nsIntRect* r = it.Next())
WriteParam(msg, *r);
// empty rects are sentinel values because nsRegions will never
// contain them
WriteParam(msg, nsIntRect());
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
nsIntRect rect;
while (ReadParam(msg, iter, &rect)) {
if (rect.IsEmpty())
return true;
result->Or(*result, rect);
}
return false;
}
};
template<>
struct ParamTraits<nsIntSize>
{
typedef nsIntSize paramType;
static void Write(Message* msg, const paramType& param)
{
WriteParam(msg, param.width);
WriteParam(msg, param.height);
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
return (ReadParam(msg, iter, &result->width) &&
ReadParam(msg, iter, &result->height));
}
};
template<>
struct ParamTraits<nsRect>
{
typedef nsRect paramType;
static void Write(Message* msg, const paramType& param)
{
WriteParam(msg, param.x);
WriteParam(msg, param.y);
WriteParam(msg, param.width);
WriteParam(msg, param.height);
}
static bool Read(const Message* msg, void** iter, paramType* result)
{
return (ReadParam(msg, iter, &result->x) &&
ReadParam(msg, iter, &result->y) &&
ReadParam(msg, iter, &result->width) &&
ReadParam(msg, iter, &result->height));
}
};
template<>
struct ParamTraits<nsID>
{
typedef nsID paramType;
static void Write(Message* aMsg, const paramType& aParam)
{
WriteParam(aMsg, aParam.m0);
WriteParam(aMsg, aParam.m1);
WriteParam(aMsg, aParam.m2);
for (unsigned int i = 0; i < NS_ARRAY_LENGTH(aParam.m3); i++) {
WriteParam(aMsg, aParam.m3[i]);
}
}
static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
{
if(!ReadParam(aMsg, aIter, &(aResult->m0)) ||
!ReadParam(aMsg, aIter, &(aResult->m1)) ||
!ReadParam(aMsg, aIter, &(aResult->m2)))
return false;
for (unsigned int i = 0; i < NS_ARRAY_LENGTH(aResult->m3); i++)
if (!ReadParam(aMsg, aIter, &(aResult->m3[i])))
return false;
return true;
}
static void Log(const paramType& aParam, std::wstring* aLog)
{
aLog->append(L"{");
aLog->append(StringPrintf(L"%8.8X-%4.4X-%4.4X-",
aParam.m0,
aParam.m1,
aParam.m2));
for (unsigned int i = 0; i < NS_ARRAY_LENGTH(aParam.m3); i++)
aLog->append(StringPrintf(L"%2.2X", aParam.m3[i]));
aLog->append(L"}");
}
};
} /* namespace IPC */
#endif /* __IPC_GLUE_IPCMESSAGEUTILS_H__ */
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