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|
//
// upb - a minimalist implementation of protocol buffers.
//
// Copyright (c) 2011-2012 Google Inc. See LICENSE for details.
// Author: Josh Haberman <jhaberman@gmail.com>
//
// Note that we have received an exception from c-style-artiters regarding
// dynamic_cast<> in this file:
// https://groups.google.com/a/google.com/d/msg/c-style/7Zp_XCX0e7s/I6dpzno4l-MJ
//
// IMPORTANT NOTE! This file is compiled TWICE, once with UPB_GOOGLE3 defined
// and once without! This allows us to provide functionality against proto2
// and protobuf opensource both in a single binary without the two conflicting.
// However we must be careful not to violate the ODR.
#include "upb/google/proto2.h"
#include "upb/def.h"
#include "upb/google/proto1.h"
#include "upb/handlers.h"
#include "upb/sink.h"
namespace upb {
namespace google_google3 { class GMR_Handlers; }
namespace google_opensource { class GMR_Handlers; }
} // namespace upb
// BEGIN DOUBLE COMPILATION TRICKERY. //////////////////////////////////////////
#ifdef UPB_GOOGLE3
#include "net/proto2/proto/descriptor.pb.h"
#include "net/proto2/public/descriptor.h"
#include "net/proto2/public/extension_set.h"
#include "net/proto2/public/generated_message_reflection.h"
#include "net/proto2/public/lazy_field.h"
#include "net/proto2/public/message.h"
#include "net/proto2/public/repeated_field.h"
#include "net/proto2/public/string_piece_field_support.h"
namespace goog = ::proto2;
namespace me = ::upb::google_google3;
#else
// TODO(haberman): remove these once new versions of protobuf that "friend"
// upb are pervasive in the wild.
#define protected public
#include "google/protobuf/repeated_field.h"
#undef protected
#define private public
#include "google/protobuf/generated_message_reflection.h"
#undef private
#include "google/protobuf/descriptor.h"
#include "google/protobuf/descriptor.pb.h"
#include "google/protobuf/extension_set.h"
#include "google/protobuf/message.h"
namespace goog = ::google::protobuf;
namespace me = ::upb::google_opensource;
using goog::int32;
using goog::int64;
using goog::uint32;
using goog::uint64;
#endif // ifdef UPB_GOOGLE3
// END DOUBLE COMPILATION TRICKERY. ////////////////////////////////////////////
// Have to define this manually since older versions of proto2 didn't define
// an enum value for STRING.
#define UPB_CTYPE_STRING 0
template <class T> static T* GetPointer(void* message, size_t offset) {
return reinterpret_cast<T*>(static_cast<char*>(message) + offset);
}
template <class T>
static const T* GetConstPointer(const void* message, size_t offset) {
return reinterpret_cast<const T*>(static_cast<const char*>(message) + offset);
}
// This class contains handlers that can write into a proto2 class whose
// reflection class is GeneratedMessageReflection. (Despite the name, even
// DynamicMessage uses GeneratedMessageReflection, so this covers all proto2
// messages generated by the compiler.) To do this it must break the
// encapsulation of GeneratedMessageReflection and therefore depends on
// internal interfaces that are not guaranteed to be stable. This class will
// need to be updated if any non-backward-compatible changes are made to
// GeneratedMessageReflection.
class me::GMR_Handlers {
public:
// Returns true if we were able to set an accessor and any other properties
// of the FieldDef that are necessary to read/write this field to a
// proto2::Message.
static bool TrySet(const goog::FieldDescriptor* proto2_f,
const goog::Message& m, const upb::FieldDef* upb_f,
upb::Handlers* h) {
const goog::Reflection* base_r = m.GetReflection();
// See file comment re: dynamic_cast.
const goog::internal::GeneratedMessageReflection* r =
dynamic_cast<const goog::internal::GeneratedMessageReflection*>(base_r);
if (!r) return false;
#define PRIMITIVE_TYPE(cpptype, cident) \
case goog::FieldDescriptor::cpptype: \
SetPrimitiveHandlers<cident>(proto2_f, r, upb_f, h); \
return true;
switch (proto2_f->cpp_type()) {
PRIMITIVE_TYPE(CPPTYPE_INT32, int32);
PRIMITIVE_TYPE(CPPTYPE_INT64, int64);
PRIMITIVE_TYPE(CPPTYPE_UINT32, uint32);
PRIMITIVE_TYPE(CPPTYPE_UINT64, uint64);
PRIMITIVE_TYPE(CPPTYPE_DOUBLE, double);
PRIMITIVE_TYPE(CPPTYPE_FLOAT, float);
PRIMITIVE_TYPE(CPPTYPE_BOOL, bool);
case goog::FieldDescriptor::CPPTYPE_ENUM:
if (proto2_f->is_extension()) {
SetEnumExtensionHandlers(proto2_f, r, upb_f, h);
} else {
SetEnumHandlers(proto2_f, r, upb_f, h);
}
return true;
case goog::FieldDescriptor::CPPTYPE_STRING: {
if (proto2_f->is_extension()) {
#ifdef UPB_GOOGLE3
SetStringExtensionHandlers<string>(proto2_f, r, upb_f, h);
#else
SetStringExtensionHandlers<std::string>(proto2_f, r, upb_f, h);
#endif
return true;
}
// Old versions of the open-source protobuf release erroneously default
// to Cord even though that has never been supported in the open-source
// release.
int32_t ctype = proto2_f->options().has_ctype() ?
proto2_f->options().ctype()
: UPB_CTYPE_STRING;
switch (ctype) {
#ifdef UPB_GOOGLE3
case goog::FieldOptions::STRING:
SetStringHandlers<string>(proto2_f, r, upb_f, h);
return true;
case goog::FieldOptions::CORD:
SetCordHandlers(proto2_f, r, upb_f, h);
return true;
case goog::FieldOptions::STRING_PIECE:
SetStringPieceHandlers(proto2_f, r, upb_f, h);
return true;
#else
case UPB_CTYPE_STRING:
SetStringHandlers<std::string>(proto2_f, r, upb_f, h);
return true;
#endif
default:
return false;
}
}
case goog::FieldDescriptor::CPPTYPE_MESSAGE:
#ifdef UPB_GOOGLE3
if (proto2_f->options().lazy()) {
assert(false);
return false; // Not yet implemented.
}
#endif
if (proto2_f->is_extension()) {
SetSubMessageExtensionHandlers(proto2_f, m, r, upb_f, h);
return true;
}
SetSubMessageHandlers(proto2_f, m, r, upb_f, h);
return true;
default:
return false;
}
}
#undef PRIMITIVE_TYPE
static const goog::Message* GetFieldPrototype(
const goog::Message& m, const goog::FieldDescriptor* f) {
// We assume that all submessages (and extensions) will be constructed
// using the same MessageFactory as this message. This doesn't cover the
// case of CodedInputStream::SetExtensionRegistry().
// See file comment re: dynamic_cast.
const goog::internal::GeneratedMessageReflection* r =
dynamic_cast<const goog::internal::GeneratedMessageReflection*>(
m.GetReflection());
if (!r) return NULL;
return r->message_factory_->GetPrototype(f->message_type());
}
private:
static upb_selector_t GetSelector(const upb::FieldDef* f,
upb::Handlers::Type type) {
upb::Handlers::Selector selector;
bool ok = upb::Handlers::GetSelector(f, type, &selector);
UPB_ASSERT_VAR(ok, ok);
return selector;
}
static int64_t GetHasbit(
const goog::FieldDescriptor* f,
const goog::internal::GeneratedMessageReflection* r) {
// proto2 does not store hasbits for repeated fields.
assert(!f->is_repeated());
return (r->has_bits_offset_ * 8) + f->index();
}
static uint16_t GetOffset(
const goog::FieldDescriptor* f,
const goog::internal::GeneratedMessageReflection* r) {
return r->offsets_[f->index()];
}
class FieldOffset {
public:
FieldOffset(const goog::FieldDescriptor* f,
const goog::internal::GeneratedMessageReflection* r)
: offset_(GetOffset(f, r)), is_repeated_(f->is_repeated()) {
if (!is_repeated_) {
int64_t hasbit = GetHasbit(f, r);
hasbyte_ = hasbit / 8;
mask_ = 1 << (hasbit % 8);
}
}
template <class T> T* GetFieldPointer(void* message) const {
return GetPointer<T>(message, offset_);
}
void SetHasbit(void* m) const {
assert(!is_repeated_);
uint8_t* byte = GetPointer<uint8_t>(m, hasbyte_);
*byte |= mask_;
}
private:
const size_t offset_;
bool is_repeated_;
// Only for non-repeated fields.
int32_t hasbyte_;
int8_t mask_;
};
class ExtensionFieldData {
public:
ExtensionFieldData(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r)
: offset_(r->extensions_offset_),
number_(proto2_f->number()),
type_(proto2_f->type()) {
}
int number() const { return number_; }
goog::internal::FieldType type() const { return type_; }
goog::internal::ExtensionSet* GetExtensionSet(goog::Message* m) const {
return GetPointer<goog::internal::ExtensionSet>(m, offset_);
}
private:
const size_t offset_;
int number_;
goog::internal::FieldType type_;
};
// StartSequence /////////////////////////////////////////////////////////////
static void SetStartSequenceHandler(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
assert(f->IsSequence());
h->SetStartSequenceHandler(f, &PushOffset, new FieldOffset(proto2_f, r),
&upb::DeletePointer<FieldOffset>);
}
static void* PushOffset(const upb::SinkFrame* frame) {
const FieldOffset* offset =
static_cast<FieldOffset*>(frame->handler_data());
return offset->GetFieldPointer<void>(frame->userdata());
}
// Primitive Value (numeric, bool) ///////////////////////////////////////////
template <typename T> static void SetPrimitiveHandlers(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
if (proto2_f->is_extension()) {
ExtensionFieldData* data = new ExtensionFieldData(proto2_f, r);
upb::Handlers::Free* free = &upb::DeletePointer<ExtensionFieldData>;
if (f->IsSequence()) {
h->SetValueHandler<T>(f, &AppendPrimitiveExtension<T>, data, free);
} else {
h->SetValueHandler<T>(f, &SetPrimitiveExtension<T>, data, free);
}
} else {
if (f->IsSequence()) {
SetStartSequenceHandler(proto2_f, r, f, h);
h->SetValueHandler<T>(f, &AppendPrimitive<T>, NULL, NULL);
} else {
upb::SetStoreValueHandler<T>(f, GetOffset(proto2_f, r),
GetHasbit(proto2_f, r), h);
}
}
}
template <typename T>
static bool AppendPrimitive(const upb::SinkFrame* frame, T val) {
goog::RepeatedField<T>* r =
static_cast<goog::RepeatedField<T>*>(frame->userdata());
r->Add(val);
return true;
}
template <typename T>
static bool AppendPrimitiveExtension(const upb::SinkFrame* frame, T val) {
goog::Message* m = frame->GetUserdata<goog::Message>();
ExtensionFieldData* data =
static_cast<ExtensionFieldData*>(frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
// TODO(haberman): give an accurate value for "packed"
goog::internal::RepeatedPrimitiveTypeTraits<T>::Add(
data->number(), data->type(), true, val, set);
return true;
}
template <typename T>
static bool SetPrimitiveExtension(const upb::SinkFrame* frame, T val) {
goog::Message* m = frame->GetUserdata<goog::Message>();
ExtensionFieldData* data =
static_cast<ExtensionFieldData*>(frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
goog::internal::PrimitiveTypeTraits<T>::Set(data->number(), data->type(),
val, set);
return true;
}
// Enum //////////////////////////////////////////////////////////////////////
class EnumHandlerData : public FieldOffset {
public:
EnumHandlerData(const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f)
: FieldOffset(proto2_f, r),
field_number_(f->number()),
unknown_fields_offset_(r->unknown_fields_offset_),
enum_(upb_downcast_enumdef(f->subdef())) {}
bool IsValidValue(int32_t val) const {
return enum_->FindValueByNumber(val) != NULL;
}
int32_t field_number() const { return field_number_; }
goog::UnknownFieldSet* mutable_unknown_fields(goog::Message* m) const {
return GetPointer<goog::UnknownFieldSet>(m, unknown_fields_offset_);
}
private:
int32_t field_number_;
size_t unknown_fields_offset_;
const upb::EnumDef* enum_;
};
static void SetEnumHandlers(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
assert(!proto2_f->is_extension());
EnumHandlerData* data = new EnumHandlerData(proto2_f, r, f);
if (f->IsSequence()) {
h->SetInt32Handler(f, &AppendEnum, data,
&upb::DeletePointer<EnumHandlerData>);
} else {
h->SetInt32Handler(f, &SetEnum, data,
&upb::DeletePointer<EnumHandlerData>);
}
}
static bool SetEnum(const upb::SinkFrame* frame, int32_t val) {
goog::Message* m = static_cast<goog::Message*>(frame->userdata());
const EnumHandlerData* data =
static_cast<const EnumHandlerData*>(frame->handler_data());
if (data->IsValidValue(val)) {
int32_t* message_val = data->GetFieldPointer<int32_t>(m);
*message_val = val;
data->SetHasbit(m);
} else {
data->mutable_unknown_fields(m)->AddVarint(data->field_number(), val);
}
return true;
}
static bool AppendEnum(const upb::SinkFrame* frame, int32_t val) {
// Closure is the enclosing message. We can't use the RepeatedField<> as
// the closure because we need to go back to the message for unrecognized
// enum values, which go into the unknown field set.
goog::Message* m = static_cast<goog::Message*>(frame->userdata());
const EnumHandlerData* data =
static_cast<const EnumHandlerData*>(frame->handler_data());
if (data->IsValidValue(val)) {
goog::RepeatedField<int32_t>* r =
data->GetFieldPointer<goog::RepeatedField<int32_t>>(m);
r->Add(val);
} else {
data->mutable_unknown_fields(m)->AddVarint(data->field_number(), val);
}
return true;
}
// EnumExtension /////////////////////////////////////////////////////////////
static void SetEnumExtensionHandlers(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
assert(proto2_f->is_extension());
ExtensionFieldData* data = new ExtensionFieldData(proto2_f, r);
if (f->IsSequence()) {
h->SetInt32Handler(f, &AppendEnumExtension, data,
upb::DeletePointer<ExtensionFieldData>);
} else {
h->SetInt32Handler(f, &SetEnumExtension, data,
upb::DeletePointer<ExtensionFieldData>);
}
}
static bool SetEnumExtension(const upb::SinkFrame* frame, int32_t val) {
goog::Message* m = frame->GetUserdata<goog::Message>();
const ExtensionFieldData* data =
static_cast<const ExtensionFieldData*>(frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
set->SetEnum(data->number(), data->type(), val, NULL);
return true;
}
static bool AppendEnumExtension(const upb::SinkFrame* frame, int32_t val) {
goog::Message* m = frame->GetUserdata<goog::Message>();
const ExtensionFieldData* data =
static_cast<const ExtensionFieldData*>(frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
// TODO(haberman): give an accurate value for "packed"
set->AddEnum(data->number(), data->type(), true, val, NULL);
return true;
}
// String ////////////////////////////////////////////////////////////////////
// For scalar (non-repeated) string fields.
template <class T> class StringHandlerData : public FieldOffset {
public:
StringHandlerData(const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r)
: FieldOffset(proto2_f, r),
prototype_(*GetConstPointer<T*>(r->default_instance_,
GetOffset(proto2_f, r))) {}
const T* prototype() const { return prototype_; }
T** GetStringPointer(void* message) const {
return GetFieldPointer<T*>(message);
}
private:
const T* prototype_;
};
template <typename T> static void SetStringHandlers(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f,
upb::Handlers* h) {
assert(!proto2_f->is_extension());
h->SetStringHandler(f, &OnStringBuf<T>, NULL, NULL);
if (f->IsSequence()) {
SetStartSequenceHandler(proto2_f, r, f, h);
h->SetStartStringHandler(f, &StartRepeatedString<T>, NULL, NULL);
} else {
StringHandlerData<T>* data = new StringHandlerData<T>(proto2_f, r);
h->SetStartStringHandler(f, &StartString<T>, data,
&upb::DeletePointer<StringHandlerData<T>>);
}
}
// This needs to be templated because google3 string is not std::string.
template <typename T>
static void* StartString(const upb::SinkFrame* frame, size_t size_hint) {
UPB_UNUSED(size_hint);
goog::Message* m = static_cast<goog::Message*>(frame->userdata());
const StringHandlerData<T>* data =
static_cast<const StringHandlerData<T>*>(frame->handler_data());
T** str = data->GetStringPointer(m);
data->SetHasbit(m);
// If it points to the default instance, we must create a new instance.
if (*str == data->prototype()) *str = new T();
(*str)->clear();
// reserve() here appears to hurt performance rather than help.
return *str;
}
template <typename T>
static size_t OnStringBuf(const upb::SinkFrame* frame,
const char* buf, size_t n) {
T* str = static_cast<T*>(frame->userdata());
str->append(buf, n);
return n;
}
template <typename T>
static void* StartRepeatedString(const upb::SinkFrame* frame,
size_t size_hint) {
UPB_UNUSED(size_hint);
goog::RepeatedPtrField<T>* r =
static_cast<goog::RepeatedPtrField<T>*>(frame->userdata());
T* str = r->Add();
str->clear();
// reserve() here appears to hurt performance rather than help.
return str;
}
// StringExtension ///////////////////////////////////////////////////////////
template <typename T>
static void SetStringExtensionHandlers(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
assert(proto2_f->is_extension());
h->SetStringHandler(f, &OnStringBuf<T>, NULL, NULL);
ExtensionFieldData* data = new ExtensionFieldData(proto2_f, r);
if (f->IsSequence()) {
h->SetStartStringHandler(f, &StartRepeatedStringExtension, data,
upb::DeletePointer<ExtensionFieldData>);
} else {
h->SetStartStringHandler(f, &StartStringExtension, data,
upb::DeletePointer<ExtensionFieldData>);
}
}
// google3 string is not std::string, but we avoid needing to template
// because we do not actually have to declare the string type.
static void* StartStringExtension(const upb::SinkFrame* frame,
size_t size_hint) {
UPB_UNUSED(size_hint);
goog::Message* m = frame->GetUserdata<goog::Message>();
const ExtensionFieldData* data =
static_cast<const ExtensionFieldData*>(frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
return set->MutableString(data->number(), data->type(), NULL);
}
static void* StartRepeatedStringExtension(const upb::SinkFrame* frame,
size_t size_hint) {
UPB_UNUSED(size_hint);
goog::Message* m = frame->GetUserdata<goog::Message>();
const ExtensionFieldData* data =
static_cast<const ExtensionFieldData*>(frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
return set->AddString(data->number(), data->type(), NULL);
}
// SubMessage ////////////////////////////////////////////////////////////////
class SubMessageHandlerData : public FieldOffset {
public:
SubMessageHandlerData(const goog::FieldDescriptor* f,
const goog::internal::GeneratedMessageReflection* r,
const goog::Message* prototype)
: FieldOffset(f, r), prototype_(prototype) {}
const goog::Message* prototype() const { return prototype_; }
private:
const goog::Message* const prototype_;
};
static void SetSubMessageHandlers(
const goog::FieldDescriptor* proto2_f, const goog::Message& m,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
const goog::Message* field_prototype = GetFieldPrototype(m, proto2_f);
SubMessageHandlerData* data =
new SubMessageHandlerData(proto2_f, r, field_prototype);
upb::Handlers::Free* free = &upb::DeletePointer<SubMessageHandlerData>;
if (f->IsSequence()) {
SetStartSequenceHandler(proto2_f, r, f, h);
h->SetStartSubMessageHandler(f, &StartRepeatedSubMessage, data, free);
} else {
h->SetStartSubMessageHandler(f, &StartSubMessage, data, free);
}
}
static void* StartSubMessage(const upb::SinkFrame* frame) {
void* m = frame->userdata();
const SubMessageHandlerData* data =
static_cast<const SubMessageHandlerData*>(frame->handler_data());
data->SetHasbit(m);
goog::Message** subm =
data->GetFieldPointer<goog::Message*>(frame->userdata());
if (*subm == NULL || *subm == data->prototype()) {
*subm = data->prototype()->New();
}
return *subm;
}
class RepeatedMessageTypeHandler {
public:
typedef void Type;
// AddAllocated() calls this, but only if other objects are sitting
// around waiting for reuse, which we will not do.
static void Delete(Type* t) {
UPB_UNUSED(t);
assert(false);
}
};
// Closure is a RepeatedPtrField<SubMessageType>*, but we access it through
// its base class RepeatedPtrFieldBase*.
static void* StartRepeatedSubMessage(const upb::SinkFrame* frame) {
const SubMessageHandlerData* data =
static_cast<const SubMessageHandlerData*>(frame->handler_data());
goog::internal::RepeatedPtrFieldBase* r =
static_cast<goog::internal::RepeatedPtrFieldBase*>(frame->userdata());
void* submsg = r->AddFromCleared<RepeatedMessageTypeHandler>();
if (!submsg) {
submsg = data->prototype()->New();
r->AddAllocated<RepeatedMessageTypeHandler>(submsg);
}
return submsg;
}
// SubMessageExtension ///////////////////////////////////////////////////////
class SubMessageExtensionHandlerData : public ExtensionFieldData {
public:
SubMessageExtensionHandlerData(
const goog::FieldDescriptor* proto2_f,
const goog::internal::GeneratedMessageReflection* r,
const goog::Message* prototype)
: ExtensionFieldData(proto2_f, r),
prototype_(prototype) {
}
const goog::Message* prototype() const { return prototype_; }
private:
const goog::Message* const prototype_;
};
static void SetSubMessageExtensionHandlers(
const goog::FieldDescriptor* proto2_f,
const goog::Message& m,
const goog::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f,
upb::Handlers* h) {
const goog::Message* field_prototype = GetFieldPrototype(m, proto2_f);
SubMessageExtensionHandlerData* data =
new SubMessageExtensionHandlerData(proto2_f, r, field_prototype);
upb::Handlers::Free* free = &upb::DeletePointer<SubMessageHandlerData>;
if (f->IsSequence()) {
h->SetStartSubMessageHandler(f, &StartRepeatedSubMessageExtension, data,
free);
} else {
h->SetStartSubMessageHandler(f, &StartSubMessageExtension, data, free);
}
}
static void* StartRepeatedSubMessageExtension(const upb::SinkFrame* frame) {
goog::Message* m = frame->GetUserdata<goog::Message>();
const SubMessageExtensionHandlerData* data =
static_cast<const SubMessageExtensionHandlerData*>(
frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
return set->AddMessage(data->number(), data->type(), *data->prototype(),
NULL);
}
static void* StartSubMessageExtension(const upb::SinkFrame* frame) {
goog::Message* m = frame->GetUserdata<goog::Message>();
const SubMessageExtensionHandlerData* data =
static_cast<const SubMessageExtensionHandlerData*>(
frame->handler_data());
goog::internal::ExtensionSet* set = data->GetExtensionSet(m);
return set->MutableMessage(data->number(), data->type(), *data->prototype(),
NULL);
}
// TODO(haberman): handle Unknown Fields.
#ifdef UPB_GOOGLE3
// Handlers for types/features only included in internal proto2 release:
// Cord, StringPiece, LazyField, and MessageSet.
// TODO(haberman): LazyField, MessageSet.
// Cord //////////////////////////////////////////////////////////////////////
static void SetCordHandlers(
const proto2::FieldDescriptor* proto2_f,
const proto2::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
assert(!proto2_f->is_extension());
h->SetStringHandler(f, &OnCordBuf, NULL, NULL);
if (f->IsSequence()) {
SetStartSequenceHandler(proto2_f, r, f, h);
h->SetStartStringHandler(f, &StartRepeatedCord, NULL, NULL);
} else {
h->SetStartStringHandler(f, &StartCord, new FieldOffset(proto2_f, r),
&upb::DeletePointer<FieldOffset*>);
}
}
static void* StartCord(const upb::SinkFrame* frame, size_t size_hint) {
UPB_UNUSED(size_hint);
void* m = frame->userdata();
const FieldOffset* offset =
static_cast<const FieldOffset*>(frame->handler_data());
offset->SetHasbit(m);
Cord* field = offset->GetFieldPointer<Cord>(m);
field->Clear();
return field;
}
static size_t OnCordBuf(const upb::SinkFrame* frame,
const char* buf, size_t n) {
Cord* c = static_cast<Cord*>(frame->userdata());
c->Append(StringPiece(buf, n));
return n;
}
static void* StartRepeatedCord(const upb::SinkFrame* frame,
size_t size_hint) {
UPB_UNUSED(size_hint);
proto2::RepeatedField<Cord>* r =
static_cast<proto2::RepeatedField<Cord>*>(frame->userdata());
return r->Add();
}
// StringPiece ///////////////////////////////////////////////////////////////
static void SetStringPieceHandlers(
const proto2::FieldDescriptor* proto2_f,
const proto2::internal::GeneratedMessageReflection* r,
const upb::FieldDef* f, upb::Handlers* h) {
assert(!proto2_f->is_extension());
h->SetStringHandler(f, &OnStringPieceBuf, NULL, NULL);
if (f->IsSequence()) {
SetStartSequenceHandler(proto2_f, r, f, h);
h->SetStartStringHandler(f, &StartRepeatedStringPiece, NULL, NULL);
} else {
h->SetStartStringHandler(f, &StartStringPiece,
new FieldOffset(proto2_f, r),
&upb::DeletePointer<FieldOffset*>);
}
}
static size_t OnStringPieceBuf(const upb::SinkFrame* frame,
const char* buf, size_t len) {
// TODO(haberman): alias if possible and enabled on the input stream.
// TODO(haberman): add a method to StringPieceField that lets us avoid
// this copy/malloc/free.
proto2::internal::StringPieceField* field =
static_cast<proto2::internal::StringPieceField*>(frame->userdata());
size_t new_len = field->size() + len;
char* data = new char[new_len];
memcpy(data, field->data(), field->size());
memcpy(data + field->size(), buf, len);
field->CopyFrom(StringPiece(data, new_len));
delete[] data;
return len;
}
static void* StartStringPiece(const upb::SinkFrame* frame,
size_t size_hint) {
UPB_UNUSED(size_hint);
void* m = frame->userdata();
const FieldOffset* offset =
static_cast<const FieldOffset*>(frame->handler_data());
offset->SetHasbit(m);
proto2::internal::StringPieceField* field =
offset->GetFieldPointer<proto2::internal::StringPieceField>(m);
field->Clear();
return field;
}
static void* StartRepeatedStringPiece(const upb::SinkFrame* frame,
size_t size_hint) {
UPB_UNUSED(size_hint);
typedef proto2::RepeatedPtrField<
proto2::internal::StringPieceField> RepeatedStringPiece;
RepeatedStringPiece* r =
static_cast<RepeatedStringPiece*>(frame->userdata());
proto2::internal::StringPieceField* field = r->Add();
field->Clear();
return field;
}
#endif // UPB_GOOGLE3
};
namespace upb {
namespace google {
bool TrySetWriteHandlers(const goog::FieldDescriptor* proto2_f,
const goog::Message& prototype,
const upb::FieldDef* upb_f, upb::Handlers* h) {
return me::GMR_Handlers::TrySet(proto2_f, prototype, upb_f, h);
}
const goog::Message* GetFieldPrototype(const goog::Message& m,
const goog::FieldDescriptor* f) {
return me::GMR_Handlers::GetFieldPrototype(m, f);
}
} // namespace google
} // namespace upb
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