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protobuf/upbc/protoc-gen-upb.cc

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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google LLC nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <algorithm>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <limits>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "absl/container/flat_hash_map.h"
#include "absl/container/flat_hash_set.h"
#include "absl/log/absl_check.h"
#include "absl/log/absl_log.h"
#include "absl/strings/escaping.h"
#include "absl/strings/string_view.h"
#include "absl/strings/substitute.h"
#include "upb/base/descriptor_constants.h"
#include "upb/base/string_view.h"
#include "upb/reflection/def.hpp"
#include "upb/wire/types.h"
#include "upbc/common.h"
#include "upbc/file_layout.h"
#include "upbc/names.h"
#include "upbc/plugin.h"
// Must be last.
#include "upb/port/def.inc"
namespace upbc {
namespace {
struct Options {
bool bootstrap = false;
};
// Returns fields in order of "hotness", eg. how frequently they appear in
// serialized payloads. Ideally this will use a profile. When we don't have
// that, we assume that fields with smaller numbers are used more frequently.
inline std::vector<upb::FieldDefPtr> FieldHotnessOrder(
upb::MessageDefPtr message) {
std::vector<upb::FieldDefPtr> fields;
size_t field_count = message.field_count();
fields.reserve(field_count);
for (size_t i = 0; i < field_count; i++) {
fields.push_back(message.field(i));
}
std::sort(fields.begin(), fields.end(),
[](upb::FieldDefPtr a, upb::FieldDefPtr b) {
return std::make_pair(!a.is_required(), a.number()) <
std::make_pair(!b.is_required(), b.number());
});
return fields;
}
std::string SourceFilename(upb::FileDefPtr file) {
return StripExtension(file.name()) + ".upb.c";
}
std::string MessageInitName(upb::MessageDefPtr descriptor) {
return absl::StrCat(MessageName(descriptor), "_msg_init");
}
std::string MessageMiniTableRef(upb::MessageDefPtr descriptor,
const Options& options) {
if (options.bootstrap) {
return absl::StrCat(MessageInitName(descriptor), "()");
} else {
return absl::StrCat("&", MessageInitName(descriptor));
}
}
std::string EnumInitName(upb::EnumDefPtr descriptor) {
return ToCIdent(descriptor.full_name()) + "_enum_init";
}
std::string EnumMiniTableRef(upb::EnumDefPtr descriptor,
const Options& options) {
if (options.bootstrap) {
return absl::StrCat(EnumInitName(descriptor), "()");
} else {
return absl::StrCat("&", EnumInitName(descriptor));
}
}
std::string ExtensionIdentBase(upb::FieldDefPtr ext) {
assert(ext.is_extension());
std::string ext_scope;
if (ext.extension_scope()) {
return MessageName(ext.extension_scope());
} else {
return ToCIdent(ext.file().package());
}
}
std::string ExtensionLayout(upb::FieldDefPtr ext) {
return absl::StrCat(ExtensionIdentBase(ext), "_", ext.name(), "_ext");
}
const char* kEnumsInit = "enums_layout";
const char* kExtensionsInit = "extensions_layout";
const char* kMessagesInit = "messages_layout";
std::string EnumValueSymbol(upb::EnumValDefPtr value) {
return ToCIdent(value.full_name());
}
std::string CTypeInternal(upb::FieldDefPtr field, bool is_const) {
std::string maybe_const = is_const ? "const " : "";
switch (field.ctype()) {
case kUpb_CType_Message: {
std::string maybe_struct =
field.file() != field.message_type().file() ? "struct " : "";
return maybe_const + maybe_struct + MessageName(field.message_type()) +
"*";
}
case kUpb_CType_Bool:
return "bool";
case kUpb_CType_Float:
return "float";
case kUpb_CType_Int32:
case kUpb_CType_Enum:
return "int32_t";
case kUpb_CType_UInt32:
return "uint32_t";
case kUpb_CType_Double:
return "double";
case kUpb_CType_Int64:
return "int64_t";
case kUpb_CType_UInt64:
return "uint64_t";
case kUpb_CType_String:
case kUpb_CType_Bytes:
return "upb_StringView";
default:
abort();
}
}
std::string FloatToCLiteral(float value) {
if (value == std::numeric_limits<float>::infinity()) {
return "kUpb_FltInfinity";
} else if (value == -std::numeric_limits<float>::infinity()) {
return "-kUpb_FltInfinity";
} else if (std::isnan(value)) {
return "kUpb_NaN";
} else {
return absl::StrCat(value);
}
}
std::string DoubleToCLiteral(double value) {
if (value == std::numeric_limits<double>::infinity()) {
return "kUpb_Infinity";
} else if (value == -std::numeric_limits<double>::infinity()) {
return "-kUpb_Infinity";
} else if (std::isnan(value)) {
return "kUpb_NaN";
} else {
return absl::StrCat(value);
}
}
std::string FieldDefault(upb::FieldDefPtr field) {
switch (field.ctype()) {
case kUpb_CType_Message:
return "NULL";
case kUpb_CType_Bytes:
case kUpb_CType_String: {
upb_StringView str = field.default_value().str_val;
return absl::Substitute(
"upb_StringView_FromString(\"$0\")",
absl::CEscape(absl::string_view(str.data, str.size)));
}
case kUpb_CType_Int32:
return absl::Substitute("(int32_t)$0", field.default_value().int32_val);
case kUpb_CType_Int64:
if (field.default_value().int64_val == INT64_MIN) {
// Special-case to avoid:
// integer literal is too large to be represented in a signed integer
// type, interpreting as unsigned
// [-Werror,-Wimplicitly-unsigned-literal]
// int64_t default_val = (int64_t)-9223372036854775808ll;
//
// More info here: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52661
return "INT64_MIN";
} else {
return absl::Substitute("(int64_t)$0ll",
field.default_value().int64_val);
}
case kUpb_CType_UInt32:
return absl::Substitute("(uint32_t)$0u",
field.default_value().uint32_val);
case kUpb_CType_UInt64:
return absl::Substitute("(uint64_t)$0ull",
field.default_value().uint64_val);
case kUpb_CType_Float:
return FloatToCLiteral(field.default_value().float_val);
case kUpb_CType_Double:
return DoubleToCLiteral(field.default_value().double_val);
case kUpb_CType_Bool:
return field.default_value().bool_val ? "true" : "false";
case kUpb_CType_Enum:
// Use a number instead of a symbolic name so that we don't require
// this enum's header to be included.
return absl::StrCat(field.default_value().int32_val);
}
ABSL_ASSERT(false);
return "XXX";
}
std::string CType(upb::FieldDefPtr field) {
return CTypeInternal(field, false);
}
std::string CTypeConst(upb::FieldDefPtr field) {
return CTypeInternal(field, true);
}
std::string MapKeyCType(upb::FieldDefPtr map_field) {
return CType(map_field.message_type().map_key());
}
std::string MapValueCType(upb::FieldDefPtr map_field) {
return CType(map_field.message_type().map_value());
}
std::string MapKeySize(upb::FieldDefPtr map_field, absl::string_view expr) {
return map_field.message_type().map_key().ctype() == kUpb_CType_String
? "0"
: absl::StrCat("sizeof(", expr, ")");
}
std::string MapValueSize(upb::FieldDefPtr map_field, absl::string_view expr) {
return map_field.message_type().map_value().ctype() == kUpb_CType_String
? "0"
: absl::StrCat("sizeof(", expr, ")");
}
std::string FieldInitializer(const DefPoolPair& pools, upb::FieldDefPtr field,
const Options& options);
void DumpEnumValues(upb::EnumDefPtr desc, Output& output) {
std::vector<upb::EnumValDefPtr> values;
values.reserve(desc.value_count());
for (int i = 0; i < desc.value_count(); i++) {
values.push_back(desc.value(i));
}
std::sort(values.begin(), values.end(),
[](upb::EnumValDefPtr a, upb::EnumValDefPtr b) {
return a.number() < b.number();
});
for (size_t i = 0; i < values.size(); i++) {
auto value = values[i];
output(" $0 = $1", EnumValueSymbol(value), value.number());
if (i != values.size() - 1) {
output(",");
}
output("\n");
}
}
std::string GetFieldRep(const DefPoolPair& pools, upb::FieldDefPtr field);
void GenerateExtensionInHeader(const DefPoolPair& pools, upb::FieldDefPtr ext,
Output& output) {
output(
R"cc(
UPB_INLINE bool $0_has_$1(const struct $2* msg) {
return _upb_Message_HasExtensionField(msg, &$3);
}
)cc",
ExtensionIdentBase(ext), ext.name(), MessageName(ext.containing_type()),
ExtensionLayout(ext));
output(
R"cc(
UPB_INLINE void $0_clear_$1(struct $2* msg) {
_upb_Message_ClearExtensionField(msg, &$3);
}
)cc",
ExtensionIdentBase(ext), ext.name(), MessageName(ext.containing_type()),
ExtensionLayout(ext));
if (ext.IsSequence()) {
// TODO(b/259861668): We need generated accessors for repeated extensions.
} else {
output(
R"cc(
UPB_INLINE $0 $1_$2(const struct $3* msg) {
const upb_MiniTableExtension* ext = &$4;
UPB_ASSUME(!upb_IsRepeatedOrMap(&ext->field));
UPB_ASSUME(_upb_MiniTableField_GetRep(&ext->field) == $5);
$0 default_val = $6;
$0 ret;
_upb_Message_GetExtensionField(msg, ext, &default_val, &ret);
return ret;
}
)cc",
CTypeConst(ext), ExtensionIdentBase(ext), ext.name(),
MessageName(ext.containing_type()), ExtensionLayout(ext),
GetFieldRep(pools, ext), FieldDefault(ext));
output(
R"cc(
UPB_INLINE void $1_set_$2(struct $3* msg, $0 val, upb_Arena* arena) {
const upb_MiniTableExtension* ext = &$4;
UPB_ASSUME(!upb_IsRepeatedOrMap(&ext->field));
UPB_ASSUME(_upb_MiniTableField_GetRep(&ext->field) == $5);
bool ok = _upb_Message_SetExtensionField(msg, ext, &val, arena);
UPB_ASSERT(ok);
}
)cc",
CTypeConst(ext), ExtensionIdentBase(ext), ext.name(),
MessageName(ext.containing_type()), ExtensionLayout(ext),
GetFieldRep(pools, ext));
}
}
void GenerateMessageFunctionsInHeader(upb::MessageDefPtr message,
const Options& options, Output& output) {
// TODO(b/235839510): The generated code here does not check the return values
// from upb_Encode(). How can we even fix this without breaking other things?
output(
R"cc(
UPB_INLINE $0* $0_new(upb_Arena* arena) {
return ($0*)_upb_Message_New($1, arena);
}
UPB_INLINE $0* $0_parse(const char* buf, size_t size, upb_Arena* arena) {
$0* ret = $0_new(arena);
if (!ret) return NULL;
if (upb_Decode(buf, size, ret, $1, NULL, 0, arena) != kUpb_DecodeStatus_Ok) {
return NULL;
}
return ret;
}
UPB_INLINE $0* $0_parse_ex(const char* buf, size_t size,
const upb_ExtensionRegistry* extreg,
int options, upb_Arena* arena) {
$0* ret = $0_new(arena);
if (!ret) return NULL;
if (upb_Decode(buf, size, ret, $1, extreg, options, arena) !=
kUpb_DecodeStatus_Ok) {
return NULL;
}
return ret;
}
UPB_INLINE char* $0_serialize(const $0* msg, upb_Arena* arena, size_t* len) {
char* ptr;
(void)upb_Encode(msg, $1, 0, arena, &ptr, len);
return ptr;
}
UPB_INLINE char* $0_serialize_ex(const $0* msg, int options,
upb_Arena* arena, size_t* len) {
char* ptr;
(void)upb_Encode(msg, $1, options, arena, &ptr, len);
return ptr;
}
)cc",
MessageName(message), MessageMiniTableRef(message, options));
}
void GenerateOneofInHeader(upb::OneofDefPtr oneof, const DefPoolPair& pools,
absl::string_view msg_name, const Options& options,
Output& output) {
std::string fullname = ToCIdent(oneof.full_name());
output("typedef enum {\n");
for (int j = 0; j < oneof.field_count(); j++) {
upb::FieldDefPtr field = oneof.field(j);
output(" $0_$1 = $2,\n", fullname, field.name(), field.number());
}
output(
" $0_NOT_SET = 0\n"
"} $0_oneofcases;\n",
fullname);
output(
R"cc(
UPB_INLINE $0_oneofcases $1_$2_case(const $1* msg) {
const upb_MiniTableField field = $3;
return ($0_oneofcases)upb_Message_WhichOneofFieldNumber(msg, &field);
}
)cc",
fullname, msg_name, oneof.name(),
FieldInitializer(pools, oneof.field(0), options));
}
void GenerateHazzer(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
std::string resolved_name = ResolveFieldName(field, field_names);
if (field.has_presence()) {
output(
R"cc(
UPB_INLINE bool $0_has_$1(const $0* msg) {
const upb_MiniTableField field = $2;
return _upb_Message_HasNonExtensionField(msg, &field);
}
)cc",
msg_name, resolved_name, FieldInitializer(pools, field, options));
} else if (field.IsMap()) {
// Do nothing.
} else if (field.IsSequence()) {
// TODO(b/259616267): remove.
output(
R"cc(
UPB_INLINE bool $0_has_$1(const $0* msg) {
size_t size;
$0_$1(msg, &size);
return size != 0;
}
)cc",
msg_name, resolved_name);
}
}
void GenerateClear(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names, const Options& options,
Output& output) {
if (field == field.containing_type().map_key() ||
field == field.containing_type().map_value()) {
// Cannot be cleared.
return;
}
std::string resolved_name = ResolveFieldName(field, field_names);
output(
R"cc(
UPB_INLINE void $0_clear_$1($0* msg) {
const upb_MiniTableField field = $2;
_upb_Message_ClearNonExtensionField(msg, &field);
}
)cc",
msg_name, resolved_name, FieldInitializer(pools, field, options));
}
void GenerateMapGetters(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
std::string resolved_name = ResolveFieldName(field, field_names);
output(
R"cc(
UPB_INLINE size_t $0_$1_size(const $0* msg) {
const upb_MiniTableField field = $2;
const upb_Map* map = upb_Message_GetMap(msg, &field);
return map ? _upb_Map_Size(map) : 0;
}
)cc",
msg_name, resolved_name, FieldInitializer(pools, field, options));
output(
R"cc(
UPB_INLINE bool $0_$1_get(const $0* msg, $2 key, $3* val) {
const upb_MiniTableField field = $4;
const upb_Map* map = upb_Message_GetMap(msg, &field);
if (!map) return false;
return _upb_Map_Get(map, &key, $5, val, $6);
}
)cc",
msg_name, resolved_name, MapKeyCType(field), MapValueCType(field),
FieldInitializer(pools, field, options), MapKeySize(field, "key"),
MapValueSize(field, "*val"));
output(
R"cc(
UPB_INLINE $0 $1_$2_next(const $1* msg, size_t* iter) {
const upb_MiniTableField field = $3;
const upb_Map* map = upb_Message_GetMap(msg, &field);
if (!map) return NULL;
return ($0)_upb_map_next(map, iter);
}
)cc",
CTypeConst(field), msg_name, resolved_name,
FieldInitializer(pools, field, options));
}
void GenerateMapEntryGetters(upb::FieldDefPtr field, absl::string_view msg_name,
Output& output) {
output(
R"cc(
UPB_INLINE $0 $1_$2(const $1* msg) {
$3 ret;
_upb_msg_map_$2(msg, &ret, $4);
return ret;
}
)cc",
CTypeConst(field), msg_name, field.name(), CType(field),
field.ctype() == kUpb_CType_String ? "0" : "sizeof(ret)");
}
void GenerateRepeatedGetters(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
// Generate getter returning first item and size.
//
// Example:
// UPB_INLINE const struct Bar* const* name(const Foo* msg, size_t* size)
output(
R"cc(
UPB_INLINE $0 const* $1_$2(const $1* msg, size_t* size) {
const upb_MiniTableField field = $3;
const upb_Array* arr = upb_Message_GetArray(msg, &field);
if (arr) {
if (size) *size = arr->size;
return ($0 const*)_upb_array_constptr(arr);
} else {
if (size) *size = 0;
return NULL;
}
}
)cc",
CTypeConst(field), // $0
msg_name, // $1
ResolveFieldName(field, field_names), // $2
FieldInitializer(pools, field, options) // #3
);
// Generate private getter returning array or NULL for immutable and upb_Array
// for mutable.
//
// Example:
// UPB_INLINE const upb_Array* _name_upbarray(size_t* size)
// UPB_INLINE upb_Array* _name_mutable_upbarray(size_t* size)
output(
R"cc(
UPB_INLINE const upb_Array* _$1_$2_$4(const $1* msg, size_t* size) {
const upb_MiniTableField field = $3;
const upb_Array* arr = upb_Message_GetArray(msg, &field);
if (size) {
*size = arr ? arr->size : 0;
}
return arr;
}
UPB_INLINE upb_Array* _$1_$2_$5(const $1* msg, size_t* size, upb_Arena* arena) {
const upb_MiniTableField field = $3;
upb_Array* arr = upb_Message_GetOrCreateMutableArray(
(upb_Message*)msg, &field, arena);
if (size) {
*size = arr ? arr->size : 0;
}
return arr;
}
)cc",
CTypeConst(field), // $0
msg_name, // $1
ResolveFieldName(field, field_names), // $2
FieldInitializer(pools, field, options), // $3
kRepeatedFieldArrayGetterPostfix, // $4
kRepeatedFieldMutableArrayGetterPostfix // $5
);
}
void GenerateScalarGetters(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& Options, Output& output) {
std::string field_name = ResolveFieldName(field, field_names);
output(
R"cc(
UPB_INLINE $0 $1_$2(const $1* msg) {
$0 default_val = $3;
$0 ret;
const upb_MiniTableField field = $4;
_upb_Message_GetNonExtensionField(msg, &field, &default_val, &ret);
return ret;
}
)cc",
CTypeConst(field), msg_name, field_name, FieldDefault(field),
FieldInitializer(pools, field, Options));
}
void GenerateGetters(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
if (field.IsMap()) {
GenerateMapGetters(field, pools, msg_name, field_names, options, output);
} else if (UPB_DESC(MessageOptions_map_entry)(
field.containing_type().options())) {
GenerateMapEntryGetters(field, msg_name, output);
} else if (field.IsSequence()) {
GenerateRepeatedGetters(field, pools, msg_name, field_names, options,
output);
} else {
GenerateScalarGetters(field, pools, msg_name, field_names, options, output);
}
}
void GenerateMapSetters(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
std::string resolved_name = ResolveFieldName(field, field_names);
output(
R"cc(
UPB_INLINE void $0_$1_clear($0* msg) {
const upb_MiniTableField field = $2;
upb_Map* map = (upb_Map*)upb_Message_GetMap(msg, &field);
if (!map) return;
_upb_Map_Clear(map);
}
)cc",
msg_name, resolved_name, FieldInitializer(pools, field, options));
output(
R"cc(
UPB_INLINE bool $0_$1_set($0* msg, $2 key, $3 val, upb_Arena* a) {
const upb_MiniTableField field = $4;
upb_Map* map = _upb_Message_GetOrCreateMutableMap(msg, &field, $5, $6, a);
return _upb_Map_Insert(map, &key, $5, &val, $6, a) !=
kUpb_MapInsertStatus_OutOfMemory;
}
)cc",
msg_name, resolved_name, MapKeyCType(field), MapValueCType(field),
FieldInitializer(pools, field, options), MapKeySize(field, "key"),
MapValueSize(field, "val"));
output(
R"cc(
UPB_INLINE bool $0_$1_delete($0* msg, $2 key) {
const upb_MiniTableField field = $3;
upb_Map* map = (upb_Map*)upb_Message_GetMap(msg, &field);
if (!map) return false;
return _upb_Map_Delete(map, &key, $4, NULL);
}
)cc",
msg_name, resolved_name, MapKeyCType(field),
FieldInitializer(pools, field, options), MapKeySize(field, "key"));
output(
R"cc(
UPB_INLINE $0 $1_$2_nextmutable($1* msg, size_t* iter) {
const upb_MiniTableField field = $3;
upb_Map* map = (upb_Map*)upb_Message_GetMap(msg, &field);
if (!map) return NULL;
return ($0)_upb_map_next(map, iter);
}
)cc",
CType(field), msg_name, resolved_name,
FieldInitializer(pools, field, options));
}
void GenerateRepeatedSetters(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
std::string resolved_name = ResolveFieldName(field, field_names);
output(
R"cc(
UPB_INLINE $0* $1_mutable_$2($1* msg, size_t* size) {
upb_MiniTableField field = $3;
upb_Array* arr = upb_Message_GetMutableArray(msg, &field);
if (arr) {
if (size) *size = arr->size;
return ($0*)_upb_array_ptr(arr);
} else {
if (size) *size = 0;
return NULL;
}
}
)cc",
CType(field), msg_name, resolved_name,
FieldInitializer(pools, field, options));
output(
R"cc(
UPB_INLINE $0* $1_resize_$2($1* msg, size_t size, upb_Arena* arena) {
upb_MiniTableField field = $3;
return ($0*)upb_Message_ResizeArrayUninitialized(msg, &field, size, arena);
}
)cc",
CType(field), msg_name, resolved_name,
FieldInitializer(pools, field, options));
if (field.ctype() == kUpb_CType_Message) {
output(
R"cc(
UPB_INLINE struct $0* $1_add_$2($1* msg, upb_Arena* arena) {
upb_MiniTableField field = $4;
upb_Array* arr = upb_Message_GetOrCreateMutableArray(msg, &field, arena);
if (!arr || !_upb_Array_ResizeUninitialized(arr, arr->size + 1, arena)) {
return NULL;
}
struct $0* sub = (struct $0*)_upb_Message_New($3, arena);
if (!arr || !sub) return NULL;
_upb_Array_Set(arr, arr->size - 1, &sub, sizeof(sub));
return sub;
}
)cc",
MessageName(field.message_type()), msg_name, resolved_name,
MessageMiniTableRef(field.message_type(), options),
FieldInitializer(pools, field, options));
} else {
output(
R"cc(
UPB_INLINE bool $1_add_$2($1* msg, $0 val, upb_Arena* arena) {
upb_MiniTableField field = $3;
upb_Array* arr = upb_Message_GetOrCreateMutableArray(msg, &field, arena);
if (!arr || !_upb_Array_ResizeUninitialized(arr, arr->size + 1, arena)) {
return false;
}
_upb_Array_Set(arr, arr->size - 1, &val, sizeof(val));
return true;
}
)cc",
CType(field), msg_name, resolved_name,
FieldInitializer(pools, field, options));
}
}
void GenerateNonRepeatedSetters(upb::FieldDefPtr field,
const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
if (field == field.containing_type().map_key()) {
// Key cannot be mutated.
return;
}
std::string field_name = ResolveFieldName(field, field_names);
if (field == field.containing_type().map_value()) {
output(R"cc(
UPB_INLINE void $0_set_$1($0 *msg, $2 value) {
_upb_msg_map_set_value(msg, &value, $3);
}
)cc",
msg_name, field_name, CType(field),
field.ctype() == kUpb_CType_String ? "0"
: "sizeof(" + CType(field) + ")");
} else {
output(R"cc(
UPB_INLINE void $0_set_$1($0 *msg, $2 value) {
const upb_MiniTableField field = $3;
_upb_Message_SetNonExtensionField(msg, &field, &value);
}
)cc",
msg_name, field_name, CType(field),
FieldInitializer(pools, field, options));
}
// Message fields also have a Msg_mutable_foo() accessor that will create
// the sub-message if it doesn't already exist.
if (field.ctype() == kUpb_CType_Message &&
!UPB_DESC(MessageOptions_map_entry)(field.containing_type().options())) {
output(
R"cc(
UPB_INLINE struct $0* $1_mutable_$2($1* msg, upb_Arena* arena) {
struct $0* sub = (struct $0*)$1_$2(msg);
if (sub == NULL) {
sub = (struct $0*)_upb_Message_New($3, arena);
if (sub) $1_set_$2(msg, sub);
}
return sub;
}
)cc",
MessageName(field.message_type()), msg_name, field_name,
MessageMiniTableRef(field.message_type(), options));
}
}
void GenerateSetters(upb::FieldDefPtr field, const DefPoolPair& pools,
absl::string_view msg_name,
const NameToFieldDefMap& field_names,
const Options& options, Output& output) {
if (field.IsMap()) {
GenerateMapSetters(field, pools, msg_name, field_names, options, output);
} else if (field.IsSequence()) {
GenerateRepeatedSetters(field, pools, msg_name, field_names, options,
output);
} else {
GenerateNonRepeatedSetters(field, pools, msg_name, field_names, options,
output);
}
}
void GenerateMessageInHeader(upb::MessageDefPtr message,
const DefPoolPair& pools, const Options& options,
Output& output) {
output("/* $0 */\n\n", message.full_name());
std::string msg_name = ToCIdent(message.full_name());
if (!UPB_DESC(MessageOptions_map_entry)(message.options())) {
GenerateMessageFunctionsInHeader(message, options, output);
}
for (int i = 0; i < message.real_oneof_count(); i++) {
GenerateOneofInHeader(message.oneof(i), pools, msg_name, options, output);
}
auto field_names = CreateFieldNameMap(message);
for (auto field : FieldNumberOrder(message)) {
GenerateClear(field, pools, msg_name, field_names, options, output);
GenerateGetters(field, pools, msg_name, field_names, options, output);
GenerateHazzer(field, pools, msg_name, field_names, options, output);
}
output("\n");
for (auto field : FieldNumberOrder(message)) {
GenerateSetters(field, pools, msg_name, field_names, options, output);
}
output("\n");
}
void ForwardDeclareMiniTableInit(upb::MessageDefPtr message,
const Options& options, Output& output) {
if (options.bootstrap) {
output("extern const upb_MiniTable* $0();\n", MessageInitName(message));
} else {
output("extern const upb_MiniTable $0;\n", MessageInitName(message));
}
}
void WriteHeader(const DefPoolPair& pools, upb::FileDefPtr file,
const Options& options, Output& output) {
EmitFileWarning(file.name(), output);
output(
"#ifndef $0_UPB_H_\n"
"#define $0_UPB_H_\n\n"
"#include \"upb/generated_code_support.h\"\n",
ToPreproc(file.name()));
for (int i = 0; i < file.public_dependency_count(); i++) {
if (i == 0) {
output("/* Public Imports. */\n");
}
output("#include \"$0\"\n", HeaderFilename(file.public_dependency(i)));
if (i == file.public_dependency_count() - 1) {
output("\n");
}
}
output(
"// Must be last. \n"
"#include \"upb/port/def.inc\"\n"
"\n"
"#ifdef __cplusplus\n"
"extern \"C\" {\n"
"#endif\n"
"\n");
const std::vector<upb::MessageDefPtr> this_file_messages =
SortedMessages(file);
const std::vector<upb::FieldDefPtr> this_file_exts = SortedExtensions(file);
// Forward-declare types defined in this file.
for (auto message : this_file_messages) {
output("typedef struct $0 $0;\n", ToCIdent(message.full_name()));
}
for (auto message : this_file_messages) {
ForwardDeclareMiniTableInit(message, options, output);
}
for (auto ext : this_file_exts) {
output("extern const upb_MiniTableExtension $0;\n", ExtensionLayout(ext));
}
// Forward-declare types not in this file, but used as submessages.
// Order by full name for consistent ordering.
std::map<std::string, upb::MessageDefPtr> forward_messages;
for (auto message : this_file_messages) {
for (int i = 0; i < message.field_count(); i++) {
upb::FieldDefPtr field = message.field(i);
if (field.ctype() == kUpb_CType_Message &&
field.file() != field.message_type().file()) {
forward_messages[field.message_type().full_name()] =
field.message_type();
}
}
}
for (auto ext : this_file_exts) {
if (ext.file() != ext.containing_type().file()) {
forward_messages[ext.containing_type().full_name()] =
ext.containing_type();
}
}
for (const auto& pair : forward_messages) {
output("struct $0;\n", MessageName(pair.second));
}
for (const auto& pair : forward_messages) {
ForwardDeclareMiniTableInit(pair.second, options, output);
}
if (!this_file_messages.empty()) {
output("\n");
}
std::vector<upb::EnumDefPtr> this_file_enums = SortedEnums(file);
for (auto enumdesc : this_file_enums) {
output("typedef enum {\n");
DumpEnumValues(enumdesc, output);
output("} $0;\n\n", ToCIdent(enumdesc.full_name()));
}
output("\n");
if (file.syntax() == kUpb_Syntax_Proto2) {
for (const auto enumdesc : this_file_enums) {
if (options.bootstrap) {
output("extern const upb_MiniTableEnum* $0();\n", EnumInit(enumdesc));
} else {
output("extern const upb_MiniTableEnum $0;\n", EnumInit(enumdesc));
}
}
}
output("\n");
for (auto message : this_file_messages) {
GenerateMessageInHeader(message, pools, options, output);
}
for (auto ext : this_file_exts) {
GenerateExtensionInHeader(pools, ext, output);
}
output("extern const upb_MiniTableFile $0;\n\n", FileLayoutName(file));
if (absl::string_view(file.name()) == "google/protobuf/descriptor.proto" ||
absl::string_view(file.name()) == "net/proto2/proto/descriptor.proto") {
// This is gratuitously inefficient with how many times it rebuilds
// MessageLayout objects for the same message. But we only do this for one
// proto (descriptor.proto) so we don't worry about it.
upb::MessageDefPtr max32_message;
upb::MessageDefPtr max64_message;
size_t max32 = 0;
size_t max64 = 0;
for (const auto message : this_file_messages) {
if (absl::EndsWith(message.name(), "Options")) {
size_t size32 = pools.GetMiniTable32(message)->size;
size_t size64 = pools.GetMiniTable64(message)->size;
if (size32 > max32) {
max32 = size32;
max32_message = message;
}
if (size64 > max64) {
max64 = size64;
max64_message = message;
}
}
}
output("/* Max size 32 is $0 */\n", max32_message.full_name());
output("/* Max size 64 is $0 */\n", max64_message.full_name());
output("#define _UPB_MAXOPT_SIZE UPB_SIZE($0, $1)\n\n", max32, max64);
}
output(
"#ifdef __cplusplus\n"
"} /* extern \"C\" */\n"
"#endif\n"
"\n"
"#include \"upb/port/undef.inc\"\n"
"\n"
"#endif /* $0_UPB_H_ */\n",
ToPreproc(file.name()));
}
typedef std::pair<std::string, uint64_t> TableEntry;
uint32_t GetWireTypeForField(upb::FieldDefPtr field) {
if (field.packed()) return kUpb_WireType_Delimited;
switch (field.type()) {
case kUpb_FieldType_Double:
case kUpb_FieldType_Fixed64:
case kUpb_FieldType_SFixed64:
return kUpb_WireType_64Bit;
case kUpb_FieldType_Float:
case kUpb_FieldType_Fixed32:
case kUpb_FieldType_SFixed32:
return kUpb_WireType_32Bit;
case kUpb_FieldType_Int64:
case kUpb_FieldType_UInt64:
case kUpb_FieldType_Int32:
case kUpb_FieldType_Bool:
case kUpb_FieldType_UInt32:
case kUpb_FieldType_Enum:
case kUpb_FieldType_SInt32:
case kUpb_FieldType_SInt64:
return kUpb_WireType_Varint;
case kUpb_FieldType_Group:
return kUpb_WireType_StartGroup;
case kUpb_FieldType_Message:
case kUpb_FieldType_String:
case kUpb_FieldType_Bytes:
return kUpb_WireType_Delimited;
}
UPB_UNREACHABLE();
}
uint32_t MakeTag(uint32_t field_number, uint32_t wire_type) {
return field_number << 3 | wire_type;
}
size_t WriteVarint32ToArray(uint64_t val, char* buf) {
size_t i = 0;
do {
uint8_t byte = val & 0x7fU;
val >>= 7;
if (val) byte |= 0x80U;
buf[i++] = byte;
} while (val);
return i;
}
uint64_t GetEncodedTag(upb::FieldDefPtr field) {
uint32_t wire_type = GetWireTypeForField(field);
uint32_t unencoded_tag = MakeTag(field.number(), wire_type);
char tag_bytes[10] = {0};
WriteVarint32ToArray(unencoded_tag, tag_bytes);
uint64_t encoded_tag = 0;
memcpy(&encoded_tag, tag_bytes, sizeof(encoded_tag));
// TODO: byte-swap for big endian.
return encoded_tag;
}
int GetTableSlot(upb::FieldDefPtr field) {
uint64_t tag = GetEncodedTag(field);
if (tag > 0x7fff) {
// Tag must fit within a two-byte varint.
return -1;
}
return (tag & 0xf8) >> 3;
}
bool TryFillTableEntry(const DefPoolPair& pools, upb::FieldDefPtr field,
TableEntry& ent) {
const upb_MiniTable* mt = pools.GetMiniTable64(field.containing_type());
const upb_MiniTableField* mt_f =
upb_MiniTable_FindFieldByNumber(mt, field.number());
std::string type = "";
std::string cardinality = "";
switch (upb_MiniTableField_Type(mt_f)) {
case kUpb_FieldType_Bool:
type = "b1";
break;
case kUpb_FieldType_Enum:
if (upb_MiniTableField_IsClosedEnum(mt_f)) {
// We don't have the means to test proto2 enum fields for valid values.
return false;
}
[[fallthrough]];
case kUpb_FieldType_Int32:
case kUpb_FieldType_UInt32:
type = "v4";
break;
case kUpb_FieldType_Int64:
case kUpb_FieldType_UInt64:
type = "v8";
break;
case kUpb_FieldType_Fixed32:
case kUpb_FieldType_SFixed32:
case kUpb_FieldType_Float:
type = "f4";
break;
case kUpb_FieldType_Fixed64:
case kUpb_FieldType_SFixed64:
case kUpb_FieldType_Double:
type = "f8";
break;
case kUpb_FieldType_SInt32:
type = "z4";
break;
case kUpb_FieldType_SInt64:
type = "z8";
break;
case kUpb_FieldType_String:
type = "s";
break;
case kUpb_FieldType_Bytes:
type = "b";
break;
case kUpb_FieldType_Message:
type = "m";
break;
default:
return false; // Not supported yet.
}
switch (upb_FieldMode_Get(mt_f)) {
case kUpb_FieldMode_Map:
return false; // Not supported yet (ever?).
case kUpb_FieldMode_Array:
if (mt_f->mode & kUpb_LabelFlags_IsPacked) {
cardinality = "p";
} else {
cardinality = "r";
}
break;
case kUpb_FieldMode_Scalar:
if (mt_f->presence < 0) {
cardinality = "o";
} else {
cardinality = "s";
}
break;
}
uint64_t expected_tag = GetEncodedTag(field);
// Data is:
//
// 48 32 16 0
// |--------|--------|--------|--------|--------|--------|--------|--------|
// | offset (16) |case offset (16) |presence| submsg | exp. tag (16) |
// |--------|--------|--------|--------|--------|--------|--------|--------|
//
// - |presence| is either hasbit index or field number for oneofs.
uint64_t data = static_cast<uint64_t>(mt_f->offset) << 48 | expected_tag;
if (field.IsSequence()) {
// No hasbit/oneof-related fields.
}
if (field.real_containing_oneof()) {
uint64_t case_offset = ~mt_f->presence;
if (case_offset > 0xffff || field.number() > 0xff) return false;
data |= field.number() << 24;
data |= case_offset << 32;
} else {
uint64_t hasbit_index = 63; // No hasbit (set a high, unused bit).
if (mt_f->presence) {
hasbit_index = mt_f->presence;
if (hasbit_index > 31) return false;
}
data |= hasbit_index << 24;
}
if (field.ctype() == kUpb_CType_Message) {
uint64_t idx = mt_f->UPB_PRIVATE(submsg_index);
if (idx > 255) return false;
data |= idx << 16;
std::string size_ceil = "max";
size_t size = SIZE_MAX;
if (field.message_type().file() == field.file()) {
// We can only be guaranteed the size of the sub-message if it is in the
// same file as us. We could relax this to increase the speed of
// cross-file sub-message parsing if we are comfortable requiring that
// users compile all messages at the same time.
const upb_MiniTable* sub_mt = pools.GetMiniTable64(field.message_type());
size = sub_mt->size + 8;
}
std::vector<size_t> breaks = {64, 128, 192, 256};
for (auto brk : breaks) {
if (size <= brk) {
size_ceil = std::to_string(brk);
break;
}
}
ent.first = absl::Substitute("upb_p$0$1_$2bt_max$3b", cardinality, type,
expected_tag > 0xff ? "2" : "1", size_ceil);
} else {
ent.first = absl::Substitute("upb_p$0$1_$2bt", cardinality, type,
expected_tag > 0xff ? "2" : "1");
}
ent.second = data;
return true;
}
std::vector<TableEntry> FastDecodeTable(upb::MessageDefPtr message,
const DefPoolPair& pools) {
std::vector<TableEntry> table;
for (const auto field : FieldHotnessOrder(message)) {
TableEntry ent;
int slot = GetTableSlot(field);
// std::cerr << "table slot: " << field->number() << ": " << slot << "\n";
if (slot < 0) {
// Tag can't fit in the table.
continue;
}
if (!TryFillTableEntry(pools, field, ent)) {
// Unsupported field type or offset, hasbit index, etc. doesn't fit.
continue;
}
while ((size_t)slot >= table.size()) {
size_t size = std::max(static_cast<size_t>(1), table.size() * 2);
table.resize(size, TableEntry{"_upb_FastDecoder_DecodeGeneric", 0});
}
if (table[slot].first != "_upb_FastDecoder_DecodeGeneric") {
// A hotter field already filled this slot.
continue;
}
table[slot] = ent;
}
return table;
}
std::string ArchDependentSize(int64_t size32, int64_t size64) {
if (size32 == size64) return absl::StrCat(size32);
return absl::Substitute("UPB_SIZE($0, $1)", size32, size64);
}
std::string GetFieldRep(const upb_MiniTableField* field32,
const upb_MiniTableField* field64) {
switch (_upb_MiniTableField_GetRep(field32)) {
case kUpb_FieldRep_1Byte:
return "kUpb_FieldRep_1Byte";
break;
case kUpb_FieldRep_4Byte: {
if (_upb_MiniTableField_GetRep(field64) == kUpb_FieldRep_4Byte) {
return "kUpb_FieldRep_4Byte";
} else {
assert(_upb_MiniTableField_GetRep(field64) == kUpb_FieldRep_8Byte);
return "UPB_SIZE(kUpb_FieldRep_4Byte, kUpb_FieldRep_8Byte)";
}
break;
}
case kUpb_FieldRep_StringView:
return "kUpb_FieldRep_StringView";
break;
case kUpb_FieldRep_8Byte:
return "kUpb_FieldRep_8Byte";
break;
}
UPB_UNREACHABLE();
}
std::string GetFieldRep(const DefPoolPair& pools, upb::FieldDefPtr field) {
return GetFieldRep(pools.GetField32(field), pools.GetField64(field));
}
// Returns the field mode as a string initializer.
//
// We could just emit this as a number (and we may yet go in that direction) but
// for now emitting symbolic constants gives this better readability and
// debuggability.
std::string GetModeInit(const upb_MiniTableField* field32,
const upb_MiniTableField* field64) {
std::string ret;
uint8_t mode32 = field32->mode;
switch (mode32 & kUpb_FieldMode_Mask) {
case kUpb_FieldMode_Map:
ret = "(int)kUpb_FieldMode_Map";
break;
case kUpb_FieldMode_Array:
ret = "(int)kUpb_FieldMode_Array";
break;
case kUpb_FieldMode_Scalar:
ret = "(int)kUpb_FieldMode_Scalar";
break;
default:
break;
}
if (mode32 & kUpb_LabelFlags_IsPacked) {
absl::StrAppend(&ret, " | (int)kUpb_LabelFlags_IsPacked");
}
if (mode32 & kUpb_LabelFlags_IsExtension) {
absl::StrAppend(&ret, " | (int)kUpb_LabelFlags_IsExtension");
}
if (mode32 & kUpb_LabelFlags_IsAlternate) {
absl::StrAppend(&ret, " | (int)kUpb_LabelFlags_IsAlternate");
}
absl::StrAppend(&ret, " | ((int)", GetFieldRep(field32, field64),
" << kUpb_FieldRep_Shift)");
return ret;
}
std::string FieldInitializer(upb::FieldDefPtr field,
const upb_MiniTableField* field64,
const upb_MiniTableField* field32,
const Options& options) {
if (options.bootstrap) {
ABSL_CHECK(!field.is_extension());
return absl::Substitute(
"*upb_MiniTable_FindFieldByNumber($0, $1)",
MessageMiniTableRef(field.containing_type(), options), field.number());
} else {
return absl::Substitute(
"{$0, $1, $2, $3, $4, $5}", field64->number,
ArchDependentSize(field32->offset, field64->offset),
ArchDependentSize(field32->presence, field64->presence),
field64->UPB_PRIVATE(submsg_index) == kUpb_NoSub
? "kUpb_NoSub"
: absl::StrCat(field64->UPB_PRIVATE(submsg_index)).c_str(),
field64->UPB_PRIVATE(descriptortype), GetModeInit(field32, field64));
}
}
std::string FieldInitializer(const DefPoolPair& pools, upb::FieldDefPtr field,
const Options& options) {
return FieldInitializer(field, pools.GetField64(field),
pools.GetField32(field), options);
}
// Writes a single field into a .upb.c source file.
void WriteMessageField(upb::FieldDefPtr field,
const upb_MiniTableField* field64,
const upb_MiniTableField* field32,
const Options& options, Output& output) {
output(" $0,\n", FieldInitializer(field, field64, field32, options));
}
std::string GetSub(upb::FieldDefPtr field) {
if (auto message_def = field.message_type()) {
return absl::Substitute("{.submsg = &$0}", MessageInitName(message_def));
}
if (auto enum_def = field.enum_subdef()) {
if (enum_def.is_closed()) {
return absl::Substitute("{.subenum = &$0}", EnumInit(enum_def));
}
}
return std::string("{.submsg = NULL}");
}
// Writes a single message into a .upb.c source file.
void WriteMessage(upb::MessageDefPtr message, const DefPoolPair& pools,
const Options& options, Output& output) {
std::string msg_name = ToCIdent(message.full_name());
std::string fields_array_ref = "NULL";
std::string submsgs_array_ref = "NULL";
std::string subenums_array_ref = "NULL";
const upb_MiniTable* mt_32 = pools.GetMiniTable32(message);
const upb_MiniTable* mt_64 = pools.GetMiniTable64(message);
std::map<int, std::string> subs;
for (int i = 0; i < mt_64->field_count; i++) {
const upb_MiniTableField* f = &mt_64->fields[i];
uint32_t index = f->UPB_PRIVATE(submsg_index);
if (index != kUpb_NoSub) {
auto pair =
subs.emplace(index, GetSub(message.FindFieldByNumber(f->number)));
ABSL_CHECK(pair.second);
}
}
if (!subs.empty()) {
std::string submsgs_array_name = msg_name + "_submsgs";
submsgs_array_ref = "&" + submsgs_array_name + "[0]";
output("static const upb_MiniTableSub $0[$1] = {\n", submsgs_array_name,
subs.size());
int i = 0;
for (const auto& pair : subs) {
ABSL_CHECK(pair.first == i++);
output(" $0,\n", pair.second);
}
output("};\n\n");
}
if (mt_64->field_count > 0) {
std::string fields_array_name = msg_name + "__fields";
fields_array_ref = "&" + fields_array_name + "[0]";
output("static const upb_MiniTableField $0[$1] = {\n", fields_array_name,
mt_64->field_count);
for (int i = 0; i < mt_64->field_count; i++) {
WriteMessageField(message.FindFieldByNumber(mt_64->fields[i].number),
&mt_64->fields[i], &mt_32->fields[i], options, output);
}
output("};\n\n");
}
std::vector<TableEntry> table;
uint8_t table_mask = -1;
table = FastDecodeTable(message, pools);
if (table.size() > 1) {
assert((table.size() & (table.size() - 1)) == 0);
table_mask = (table.size() - 1) << 3;
}
std::string msgext = "kUpb_ExtMode_NonExtendable";
if (message.extension_range_count()) {
if (UPB_DESC(MessageOptions_message_set_wire_format)(message.options())) {
msgext = "kUpb_ExtMode_IsMessageSet";
} else {
msgext = "kUpb_ExtMode_Extendable";
}
}
output("const upb_MiniTable $0 = {\n", MessageInitName(message));
output(" $0,\n", submsgs_array_ref);
output(" $0,\n", fields_array_ref);
output(" $0, $1, $2, $3, UPB_FASTTABLE_MASK($4), $5,\n",
ArchDependentSize(mt_32->size, mt_64->size), mt_64->field_count,
msgext, mt_64->dense_below, table_mask, mt_64->required_count);
if (!table.empty()) {
output(" UPB_FASTTABLE_INIT({\n");
for (const auto& ent : table) {
output(" {0x$1, &$0},\n", ent.first,
absl::StrCat(absl::Hex(ent.second, absl::kZeroPad16)));
}
output(" })\n");
}
output("};\n\n");
}
void WriteEnum(upb::EnumDefPtr e, Output& output) {
std::string values_init = "{\n";
const upb_MiniTableEnum* mt = e.mini_table();
uint32_t value_count = (mt->mask_limit / 32) + mt->value_count;
for (uint32_t i = 0; i < value_count; i++) {
absl::StrAppend(&values_init, " 0x", absl::Hex(mt->data[i]),
",\n");
}
values_init += " }";
output(
R"cc(
const upb_MiniTableEnum $0 = {
$1,
$2,
$3,
};
)cc",
EnumInit(e), mt->mask_limit, mt->value_count, values_init);
output("\n");
}
int WriteEnums(const DefPoolPair& pools, upb::FileDefPtr file, Output& output) {
if (file.syntax() != kUpb_Syntax_Proto2) return 0;
std::vector<upb::EnumDefPtr> this_file_enums = SortedEnums(file);
for (const auto e : this_file_enums) {
WriteEnum(e, output);
}
if (!this_file_enums.empty()) {
output("static const upb_MiniTableEnum *$0[$1] = {\n", kEnumsInit,
this_file_enums.size());
for (const auto e : this_file_enums) {
output(" &$0,\n", EnumInit(e));
}
output("};\n");
output("\n");
}
return this_file_enums.size();
}
int WriteMessages(const DefPoolPair& pools, upb::FileDefPtr file,
const Options& options, Output& output) {
std::vector<upb::MessageDefPtr> file_messages = SortedMessages(file);
if (file_messages.empty()) return 0;
for (auto message : file_messages) {
WriteMessage(message, pools, options, output);
}
output("static const upb_MiniTable *$0[$1] = {\n", kMessagesInit,
file_messages.size());
for (auto message : file_messages) {
output(" &$0,\n", MessageInitName(message));
}
output("};\n");
output("\n");
return file_messages.size();
}
void WriteExtension(upb::FieldDefPtr ext, const DefPoolPair& pools,
const Options& options, Output& output) {
output("$0,\n", FieldInitializer(pools, ext, options));
output(" &$0,\n", MessageInitName(ext.containing_type()));
output(" $0,\n", GetSub(ext));
}
int WriteExtensions(const DefPoolPair& pools, upb::FileDefPtr file,
const Options& options, Output& output) {
auto exts = SortedExtensions(file);
if (exts.empty()) return 0;
// Order by full name for consistent ordering.
std::map<std::string, upb::MessageDefPtr> forward_messages;
for (auto ext : exts) {
forward_messages[ext.containing_type().full_name()] = ext.containing_type();
if (ext.message_type()) {
forward_messages[ext.message_type().full_name()] = ext.message_type();
}
}
for (const auto& decl : forward_messages) {
ForwardDeclareMiniTableInit(decl.second, options, output);
}
for (auto ext : exts) {
output("const upb_MiniTableExtension $0 = {\n ", ExtensionLayout(ext));
WriteExtension(ext, pools, options, output);
output("\n};\n");
}
output(
"\n"
"static const upb_MiniTableExtension *$0[$1] = {\n",
kExtensionsInit, exts.size());
for (auto ext : exts) {
output(" &$0,\n", ExtensionLayout(ext));
}
output(
"};\n"
"\n");
return exts.size();
}
void WriteMiniTableSource(const DefPoolPair& pools, upb::FileDefPtr file,
const Options& options, Output& output) {
EmitFileWarning(file.name(), output);
output(
"#include <stddef.h>\n"
"#include \"upb/generated_code_support.h\"\n"
"#include \"$0\"\n",
HeaderFilename(file));
for (int i = 0; i < file.dependency_count(); i++) {
output("#include \"$0\"\n", HeaderFilename(file.dependency(i)));
}
output(
"\n"
"// Must be last.\n"
"#include \"upb/port/def.inc\"\n"
"\n");
int msg_count = WriteMessages(pools, file, options, output);
int ext_count = WriteExtensions(pools, file, options, output);
int enum_count = WriteEnums(pools, file, output);
output("const upb_MiniTableFile $0 = {\n", FileLayoutName(file));
output(" $0,\n", msg_count ? kMessagesInit : "NULL");
output(" $0,\n", enum_count ? kEnumsInit : "NULL");
output(" $0,\n", ext_count ? kExtensionsInit : "NULL");
output(" $0,\n", msg_count);
output(" $0,\n", enum_count);
output(" $0,\n", ext_count);
output("};\n\n");
output("#include \"upb/port/undef.inc\"\n");
output("\n");
}
void WriteMessageMiniDescriptorInitializer(upb::MessageDefPtr msg,
const Options& options,
Output& output) {
Output resolve_calls;
for (int i = 0; i < msg.field_count(); i++) {
upb::FieldDefPtr field = msg.field(i);
if (!field.message_type() && !field.enum_subdef()) continue;
if (field.message_type()) {
resolve_calls(
"upb_MiniTable_SetSubMessage(mini_table, "
"(upb_MiniTableField*)upb_MiniTable_FindFieldByNumber(mini_table, "
"$0), $1);\n ",
field.number(), MessageMiniTableRef(field.message_type(), options));
} else if (field.enum_subdef() && field.enum_subdef().is_closed()) {
resolve_calls(
"upb_MiniTable_SetSubEnum(mini_table, "
"(upb_MiniTableField*)upb_MiniTable_FindFieldByNumber(mini_table, "
"$0), $1);\n ",
field.number(), EnumMiniTableRef(field.enum_subdef(), options));
}
}
output(
R"cc(
const upb_MiniTable* $0() {
static upb_MiniTable* mini_table = NULL;
static const char* mini_descriptor = "$1";
if (mini_table) return mini_table;
mini_table =
upb_MiniTable_Build(mini_descriptor, strlen(mini_descriptor),
upb_BootstrapArena(), NULL);
$2return mini_table;
}
)cc",
MessageInitName(msg), msg.MiniDescriptorEncode(), resolve_calls.output());
output("\n");
}
void WriteEnumMiniDescriptorInitializer(upb::EnumDefPtr enum_def,
const Options& options,
Output& output) {
output(
R"cc(
const upb_MiniTableEnum* $0() {
static const upb_MiniTableEnum* mini_table = NULL;
static const char* mini_descriptor = "$1";
if (mini_table) return mini_table;
mini_table =
upb_MiniTableEnum_Build(mini_descriptor, strlen(mini_descriptor),
upb_BootstrapArena(), NULL);
return mini_table;
}
)cc",
EnumInitName(enum_def), enum_def.MiniDescriptorEncode());
output("\n");
}
void WriteMiniDescriptorSource(const DefPoolPair& pools, upb::FileDefPtr file,
const Options& options, Output& output) {
output(
"#include <stddef.h>\n"
"#include \"upb/generated_code_support.h\"\n"
"#include \"$0\"\n\n",
HeaderFilename(file));
for (int i = 0; i < file.dependency_count(); i++) {
output("#include \"$0\"\n", HeaderFilename(file.dependency(i)));
}
output(
R"cc(
static upb_Arena* upb_BootstrapArena() {
static upb_Arena* arena = NULL;
if (!arena) arena = upb_Arena_New();
return arena;
}
)cc");
output("\n");
for (const auto msg : SortedMessages(file)) {
WriteMessageMiniDescriptorInitializer(msg, options, output);
}
for (const auto msg : SortedEnums(file)) {
WriteEnumMiniDescriptorInitializer(msg, options, output);
}
}
void WriteSource(const DefPoolPair& pools, upb::FileDefPtr file,
const Options& options, Output& output) {
if (options.bootstrap) {
WriteMiniDescriptorSource(pools, file, options, output);
} else {
WriteMiniTableSource(pools, file, options, output);
}
}
void GenerateFile(const DefPoolPair& pools, upb::FileDefPtr file,
const Options& options, Plugin* plugin) {
Output h_output;
WriteHeader(pools, file, options, h_output);
plugin->AddOutputFile(HeaderFilename(file), h_output.output());
Output c_output;
WriteSource(pools, file, options, c_output);
plugin->AddOutputFile(SourceFilename(file), c_output.output());
}
bool ParseOptions(Plugin* plugin, Options* options) {
for (const auto& pair : ParseGeneratorParameter(plugin->parameter())) {
if (pair.first == "bootstrap_upb") {
options->bootstrap = true;
} else {
plugin->SetError(absl::Substitute("Unknown parameter: $0", pair.first));
return false;
}
}
return true;
}
absl::string_view ToStringView(upb_StringView str) {
return absl::string_view(str.data, str.size);
}
} // namespace
} // namespace upbc
int main(int argc, char** argv) {
upbc::DefPoolPair pools;
upbc::Plugin plugin;
upbc::Options options;
if (!ParseOptions(&plugin, &options)) return 0;
plugin.GenerateFilesRaw([&](const UPB_DESC(FileDescriptorProto) * file_proto,
bool generate) {
upb::Status status;
upb::FileDefPtr file = pools.AddFile(file_proto, &status);
if (!file) {
absl::string_view name =
upbc::ToStringView(UPB_DESC(FileDescriptorProto_name)(file_proto));
ABSL_LOG(FATAL) << "Couldn't add file " << name
<< " to DefPool: " << status.error_message();
}
if (generate) GenerateFile(pools, file, options, &plugin);
});
return 0;
}