Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
 
 
 
 
 
 

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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#include "upb_generator/names.h"
#include <string>
#include "absl/strings/match.h"
#include "absl/strings/string_view.h"
#include "google/protobuf/descriptor.h"
#include "upb/reflection/def.hpp"
namespace upb {
namespace generator {
namespace protobuf = ::google::protobuf;
// Prefixes used by C code generator for field access.
static constexpr absl::string_view kClearMethodPrefix = "clear_";
static constexpr absl::string_view kSetMethodPrefix = "set_";
static constexpr absl::string_view kHasMethodPrefix = "has_";
static constexpr absl::string_view kDeleteMethodPrefix = "delete_";
static constexpr absl::string_view kAddToRepeatedMethodPrefix = "add_";
static constexpr absl::string_view kResizeArrayMethodPrefix = "resize_";
ABSL_CONST_INIT const absl::string_view kRepeatedFieldArrayGetterPostfix =
"upb_array";
ABSL_CONST_INIT const absl::string_view
kRepeatedFieldMutableArrayGetterPostfix = "mutable_upb_array";
ABSL_CONST_INIT const absl::string_view kMapGetterPostfix = "upb_map";
ABSL_CONST_INIT const absl::string_view kMutableMapGetterPostfix =
"mutable_upb_map";
// List of generated accessor prefixes to check against.
// Example:
// optional repeated string phase = 236;
// optional bool clear_phase = 237;
static constexpr absl::string_view kAccessorPrefixes[] = {
kClearMethodPrefix, kDeleteMethodPrefix, kAddToRepeatedMethodPrefix,
kResizeArrayMethodPrefix, kSetMethodPrefix, kHasMethodPrefix};
std::string ResolveFieldName(const protobuf::FieldDescriptor* field,
const NameToFieldDescriptorMap& field_names) {
absl::string_view field_name = field->name();
for (const auto prefix : kAccessorPrefixes) {
// If field name starts with a prefix such as clear_ and the proto
// contains a field name with trailing end, depending on type of field
// (repeated, map, message) we have a conflict to resolve.
if (absl::StartsWith(field_name, prefix)) {
auto match = field_names.find(field_name.substr(prefix.size()));
if (match != field_names.end()) {
const auto* candidate = match->second;
if (candidate->is_repeated() || candidate->is_map() ||
(candidate->cpp_type() ==
protobuf::FieldDescriptor::CPPTYPE_STRING &&
prefix == kClearMethodPrefix) ||
prefix == kSetMethodPrefix || prefix == kHasMethodPrefix) {
return absl::StrCat(field_name, "_");
}
}
}
}
return std::string(field_name);
}
// Returns field map by name to use for conflict checks.
NameToFieldDescriptorMap CreateFieldNameMap(
const protobuf::Descriptor* message) {
NameToFieldDescriptorMap field_names;
for (int i = 0; i < message->field_count(); i++) {
const protobuf::FieldDescriptor* field = message->field(i);
field_names.emplace(field->name(), field);
}
return field_names;
}
NameToFieldDefMap CreateFieldNameMap(upb::MessageDefPtr message) {
NameToFieldDefMap field_names;
field_names.reserve(message.field_count());
for (const auto& field : message.fields()) {
field_names.emplace(field.name(), field);
}
return field_names;
}
std::string ResolveFieldName(upb::FieldDefPtr field,
const NameToFieldDefMap& field_names) {
absl::string_view field_name(field.name());
for (absl::string_view prefix : kAccessorPrefixes) {
// If field name starts with a prefix such as clear_ and the proto
// contains a field name with trailing end, depending on type of field
// (repeated, map, message) we have a conflict to resolve.
if (absl::StartsWith(field_name, prefix)) {
auto match = field_names.find(field_name.substr(prefix.size()));
if (match != field_names.end()) {
const auto candidate = match->second;
if (candidate.IsSequence() || candidate.IsMap() ||
(candidate.ctype() == kUpb_CType_String &&
prefix == kClearMethodPrefix) ||
prefix == kSetMethodPrefix || prefix == kHasMethodPrefix) {
return absl::StrCat(field_name, "_");
}
}
}
}
return std::string(field_name);
}
} // namespace generator
} // namespace upb