Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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377 lines
13 KiB
377 lines
13 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2008 Google Inc. |
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// http://code.google.com/p/protobuf/ |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// Author: kenton@google.com (Kenton Varda) |
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// Based on original Protocol Buffers design by |
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// Sanjay Ghemawat, Jeff Dean, and others. |
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#include <google/protobuf/compiler/cpp/cpp_string_field.h> |
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#include <google/protobuf/compiler/cpp/cpp_helpers.h> |
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#include <google/protobuf/io/printer.h> |
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#include <google/protobuf/wire_format_inl.h> |
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#include <google/protobuf/descriptor.pb.h> |
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#include <google/protobuf/stubs/strutil.h> |
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namespace google { |
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namespace protobuf { |
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namespace compiler { |
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namespace cpp { |
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using internal::WireFormat; |
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namespace { |
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// TODO(kenton): Factor out a "SetCommonFieldVariables()" to get rid of |
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// repeat code between this and the other field types. |
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void SetStringVariables(const FieldDescriptor* descriptor, |
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map<string, string>* variables) { |
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(*variables)["name"] = FieldName(descriptor); |
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(*variables)["default"] = |
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"\"" + CEscape(descriptor->default_value_string()) + "\""; |
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(*variables)["index"] = SimpleItoa(descriptor->index()); |
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(*variables)["number"] = SimpleItoa(descriptor->number()); |
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(*variables)["classname"] = ClassName(FieldScope(descriptor), false); |
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(*variables)["declared_type"] = DeclaredTypeMethodName(descriptor->type()); |
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(*variables)["tag_size"] = SimpleItoa( |
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WireFormat::TagSize(descriptor->number(), descriptor->type())); |
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} |
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} // namespace |
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// =================================================================== |
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StringFieldGenerator:: |
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StringFieldGenerator(const FieldDescriptor* descriptor) |
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: descriptor_(descriptor) { |
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SetStringVariables(descriptor, &variables_); |
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} |
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StringFieldGenerator::~StringFieldGenerator() {} |
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void StringFieldGenerator:: |
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GeneratePrivateMembers(io::Printer* printer) const { |
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printer->Print(variables_, |
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"::std::string* $name$_;\n" |
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"static const ::std::string _default_$name$_;\n"); |
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} |
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void StringFieldGenerator:: |
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GenerateAccessorDeclarations(io::Printer* printer) const { |
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// If we're using StringFieldGenerator for a field with a ctype, it's |
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// because that ctype isn't actually implemented. In particular, this is |
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// true of ctype=CORD and ctype=STRING_PIECE in the open source release. |
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// We aren't releasing Cord because it has too many Google-specific |
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// dependencies and we aren't releasing StringPiece because it's hardly |
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// useful outside of Google and because it would get confusing to have |
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// multiple instances of the StringPiece class in different libraries (PCRE |
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// already includes it for their C++ bindings, which came from Google). |
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// |
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// In any case, we make all the accessors private while still actually |
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// using a string to represent the field internally. This way, we can |
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// guarantee that if we do ever implement the ctype, it won't break any |
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// existing users who might be -- for whatever reason -- already using .proto |
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// files that applied the ctype. The field can still be accessed via the |
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// reflection interface since the reflection interface is independent of |
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// the string's underlying representation. |
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if (descriptor_->options().has_ctype()) { |
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printer->Outdent(); |
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printer->Print( |
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" private:\n" |
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" // Hidden due to unknown ctype option.\n"); |
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printer->Indent(); |
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} |
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printer->Print(variables_, |
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"inline const ::std::string& $name$() const;\n" |
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"inline void set_$name$(const ::std::string& value);\n"); |
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if (descriptor_->type() == FieldDescriptor::TYPE_BYTES) { |
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printer->Print(variables_, |
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"inline void set_$name$(const char* value, size_t size);\n"); |
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} else { |
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printer->Print(variables_, |
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"inline void set_$name$(const char* value);\n"); |
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} |
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printer->Print(variables_, |
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"inline ::std::string* mutable_$name$();\n"); |
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if (descriptor_->options().has_ctype()) { |
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printer->Outdent(); |
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printer->Print(" public:\n"); |
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printer->Indent(); |
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} |
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} |
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void StringFieldGenerator:: |
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GenerateInlineAccessorDefinitions(io::Printer* printer) const { |
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printer->Print(variables_, |
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"inline const ::std::string& $classname$::$name$() const {\n" |
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" return *$name$_;\n" |
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"}\n" |
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"inline void $classname$::set_$name$(const ::std::string& value) {\n" |
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" _set_bit($index$);\n" |
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" if ($name$_ == &_default_$name$_) {\n" |
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" $name$_ = new ::std::string;\n" |
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" }\n" |
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" $name$_->assign(value);\n" |
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"}\n"); |
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if (descriptor_->type() == FieldDescriptor::TYPE_BYTES) { |
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printer->Print(variables_, |
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"inline void $classname$::set_$name$(const char* value, size_t size) {\n" |
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" _set_bit($index$);\n" |
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" if ($name$_ == &_default_$name$_) {\n" |
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" $name$_ = new ::std::string;\n" |
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" }\n" |
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" $name$_->assign(value, size);\n" |
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"}\n"); |
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} else { |
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printer->Print(variables_, |
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"inline void $classname$::set_$name$(const char* value) {\n" |
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" _set_bit($index$);\n" |
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" if ($name$_ == &_default_$name$_) {\n" |
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" $name$_ = new ::std::string;\n" |
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" }\n" |
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" $name$_->assign(value);\n" |
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"}\n"); |
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} |
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printer->Print(variables_, |
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"inline ::std::string* $classname$::mutable_$name$() {\n" |
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" _set_bit($index$);\n" |
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" if ($name$_ == &_default_$name$_) {\n"); |
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if (descriptor_->has_default_value()) { |
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printer->Print(variables_, |
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" $name$_ = new ::std::string(_default_$name$_);\n"); |
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} else { |
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printer->Print(variables_, |
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" $name$_ = new ::std::string;\n"); |
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} |
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printer->Print(variables_, |
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" }\n" |
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" return $name$_;\n" |
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"}\n"); |
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} |
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void StringFieldGenerator:: |
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GenerateNonInlineAccessorDefinitions(io::Printer* printer) const { |
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if (descriptor_->has_default_value()) { |
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printer->Print(variables_, |
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"const ::std::string $classname$::_default_$name$_($default$);"); |
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} else { |
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printer->Print(variables_, |
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"const ::std::string $classname$::_default_$name$_;"); |
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} |
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} |
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void StringFieldGenerator:: |
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GenerateClearingCode(io::Printer* printer) const { |
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if (descriptor_->has_default_value()) { |
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printer->Print(variables_, |
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"if ($name$_ != &_default_$name$_) {\n" |
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" $name$_->assign(_default_$name$_);\n" |
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"}\n"); |
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} else { |
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printer->Print(variables_, |
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"if ($name$_ != &_default_$name$_) {\n" |
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" $name$_->clear();\n" |
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"}\n"); |
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} |
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} |
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void StringFieldGenerator:: |
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GenerateMergingCode(io::Printer* printer) const { |
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printer->Print(variables_, "set_$name$(from.$name$());\n"); |
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} |
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void StringFieldGenerator:: |
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GenerateInitializer(io::Printer* printer) const { |
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printer->Print(variables_, |
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",\n$name$_(const_cast< ::std::string*>(&_default_$name$_))"); |
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} |
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void StringFieldGenerator:: |
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GenerateDestructorCode(io::Printer* printer) const { |
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printer->Print(variables_, |
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"if ($name$_ != &_default_$name$_) {\n" |
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" delete $name$_;\n" |
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"}\n"); |
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} |
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void StringFieldGenerator:: |
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GenerateMergeFromCodedStream(io::Printer* printer) const { |
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printer->Print(variables_, |
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"DO_(::google::protobuf::internal::WireFormat::Read$declared_type$(" |
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"input, mutable_$name$()));\n"); |
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} |
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void StringFieldGenerator:: |
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GenerateSerializeWithCachedSizes(io::Printer* printer) const { |
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printer->Print(variables_, |
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"DO_(::google::protobuf::internal::WireFormat::Write$declared_type$(" |
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"$number$, this->$name$(), output));\n"); |
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} |
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void StringFieldGenerator:: |
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GenerateByteSize(io::Printer* printer) const { |
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printer->Print(variables_, |
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"total_size += $tag_size$ +\n" |
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" ::google::protobuf::internal::WireFormat::$declared_type$Size(this->$name$());\n"); |
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} |
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// =================================================================== |
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RepeatedStringFieldGenerator:: |
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RepeatedStringFieldGenerator(const FieldDescriptor* descriptor) |
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: descriptor_(descriptor) { |
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SetStringVariables(descriptor, &variables_); |
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} |
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RepeatedStringFieldGenerator::~RepeatedStringFieldGenerator() {} |
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void RepeatedStringFieldGenerator:: |
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GeneratePrivateMembers(io::Printer* printer) const { |
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printer->Print(variables_, |
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"::google::protobuf::RepeatedPtrField< ::std::string> $name$_;\n"); |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateAccessorDeclarations(io::Printer* printer) const { |
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// See comment above about unknown ctypes. |
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if (descriptor_->options().has_ctype()) { |
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printer->Outdent(); |
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printer->Print( |
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" private:\n" |
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" // Hidden due to unknown ctype option.\n"); |
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printer->Indent(); |
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} |
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printer->Print(variables_, |
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"inline const ::google::protobuf::RepeatedPtrField< ::std::string>& $name$() const;\n" |
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"inline ::google::protobuf::RepeatedPtrField< ::std::string>* mutable_$name$();\n" |
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"inline const ::std::string& $name$(int index) const;\n" |
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"inline ::std::string* mutable_$name$(int index);\n" |
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"inline void set_$name$(int index, const ::std::string& value);\n" |
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"inline ::std::string* add_$name$();\n" |
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"inline void add_$name$(const ::std::string& value);\n"); |
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if (descriptor_->type() == FieldDescriptor::TYPE_BYTES) { |
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printer->Print(variables_, |
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"inline void set_$name$(int index, const char* value, size_t size);\n" |
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"inline void add_$name$(const char* value, size_t size);\n"); |
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} else { |
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printer->Print(variables_, |
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"inline void set_$name$(int index, const char* value);\n" |
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"inline void add_$name$(const char* value);\n"); |
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} |
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if (descriptor_->options().has_ctype()) { |
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printer->Outdent(); |
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printer->Print(" public:\n"); |
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printer->Indent(); |
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} |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateInlineAccessorDefinitions(io::Printer* printer) const { |
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printer->Print(variables_, |
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"inline const ::google::protobuf::RepeatedPtrField< ::std::string>&\n" |
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"$classname$::$name$() const {\n" |
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" return $name$_;\n" |
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"}\n" |
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"inline ::google::protobuf::RepeatedPtrField< ::std::string>*\n" |
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"$classname$::mutable_$name$() {\n" |
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" return &$name$_;\n" |
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"}\n" |
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"inline const ::std::string& $classname$::$name$(int index) const {\n" |
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" return $name$_.Get(index);\n" |
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"}\n" |
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"inline ::std::string* $classname$::mutable_$name$(int index) {\n" |
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" return $name$_.Mutable(index);\n" |
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"}\n" |
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"inline void $classname$::set_$name$(int index, const ::std::string& value) {\n" |
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" $name$_.Mutable(index)->assign(value);\n" |
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"}\n" |
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"inline ::std::string* $classname$::add_$name$() {\n" |
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" return $name$_.Add();\n" |
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"}\n" |
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"inline void $classname$::add_$name$(const ::std::string& value) {\n" |
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" $name$_.Add()->assign(value);\n" |
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"}\n"); |
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if (descriptor_->type() == FieldDescriptor::TYPE_BYTES) { |
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printer->Print(variables_, |
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"inline void " |
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"$classname$::set_$name$(int index, const char* value, size_t size) {\n" |
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" $name$_.Mutable(index)->assign(value, size);\n" |
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"}\n" |
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"inline void $classname$::add_$name$(const char* value, size_t size) {\n" |
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" $name$_.Add()->assign(value, size);\n" |
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"}\n"); |
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} else { |
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printer->Print(variables_, |
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"inline void $classname$::set_$name$(int index, const char* value) {\n" |
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" $name$_.Mutable(index)->assign(value);\n" |
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"}\n" |
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"inline void $classname$::add_$name$(const char* value) {\n" |
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" $name$_.Add()->assign(value);\n" |
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"}\n"); |
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} |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateClearingCode(io::Printer* printer) const { |
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printer->Print(variables_, "$name$_.Clear();\n"); |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateMergingCode(io::Printer* printer) const { |
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printer->Print(variables_, "$name$_.MergeFrom(from.$name$_);\n"); |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateInitializer(io::Printer* printer) const { |
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// Not needed for repeated fields. |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateMergeFromCodedStream(io::Printer* printer) const { |
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printer->Print(variables_, |
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"DO_(::google::protobuf::internal::WireFormat::Read$declared_type$(\n" |
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" input, add_$name$()));\n"); |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateSerializeWithCachedSizes(io::Printer* printer) const { |
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printer->Print(variables_, |
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"DO_(::google::protobuf::internal::WireFormat::Write$declared_type$(" |
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"$number$, this->$name$(i), output));\n"); |
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} |
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void RepeatedStringFieldGenerator:: |
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GenerateByteSize(io::Printer* printer) const { |
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printer->Print(variables_, |
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"total_size += $tag_size$ * $name$_size();\n" |
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"for (int i = 0; i < $name$_size(); i++) {\n" |
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" total_size += ::google::protobuf::internal::WireFormat::$declared_type$Size(\n" |
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" this->$name$(i));\n" |
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"}\n"); |
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} |
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} // namespace cpp |
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} // namespace compiler |
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} // namespace protobuf |
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} // namespace google
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