| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // http://code.google.com/p/protobuf/ |
| // |
| // 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 Inc. 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. |
| |
| // Author: kenton@google.com (Kenton Varda) |
| // Based on original Protocol Buffers design by |
| // Sanjay Ghemawat, Jeff Dean, and others. |
| // |
| // Recursive descent FTW. |
| |
| #include <float.h> |
| #include <google/protobuf/stubs/hash.h> |
| #include <limits> |
| |
| |
| #include <google/protobuf/compiler/parser.h> |
| #include <google/protobuf/descriptor.h> |
| #include <google/protobuf/descriptor.pb.h> |
| #include <google/protobuf/wire_format.h> |
| #include <google/protobuf/io/tokenizer.h> |
| #include <google/protobuf/stubs/common.h> |
| #include <google/protobuf/stubs/strutil.h> |
| #include <google/protobuf/stubs/map-util.h> |
| |
| namespace google { |
| namespace protobuf { |
| namespace compiler { |
| |
| using internal::WireFormat; |
| |
| namespace { |
| |
| typedef hash_map<string, FieldDescriptorProto::Type> TypeNameMap; |
| |
| TypeNameMap MakeTypeNameTable() { |
| TypeNameMap result; |
| |
| result["double" ] = FieldDescriptorProto::TYPE_DOUBLE; |
| result["float" ] = FieldDescriptorProto::TYPE_FLOAT; |
| result["uint64" ] = FieldDescriptorProto::TYPE_UINT64; |
| result["fixed64" ] = FieldDescriptorProto::TYPE_FIXED64; |
| result["fixed32" ] = FieldDescriptorProto::TYPE_FIXED32; |
| result["bool" ] = FieldDescriptorProto::TYPE_BOOL; |
| result["string" ] = FieldDescriptorProto::TYPE_STRING; |
| result["group" ] = FieldDescriptorProto::TYPE_GROUP; |
| |
| result["bytes" ] = FieldDescriptorProto::TYPE_BYTES; |
| result["uint32" ] = FieldDescriptorProto::TYPE_UINT32; |
| result["sfixed32"] = FieldDescriptorProto::TYPE_SFIXED32; |
| result["sfixed64"] = FieldDescriptorProto::TYPE_SFIXED64; |
| result["int32" ] = FieldDescriptorProto::TYPE_INT32; |
| result["int64" ] = FieldDescriptorProto::TYPE_INT64; |
| result["sint32" ] = FieldDescriptorProto::TYPE_SINT32; |
| result["sint64" ] = FieldDescriptorProto::TYPE_SINT64; |
| |
| return result; |
| } |
| |
| const TypeNameMap kTypeNames = MakeTypeNameTable(); |
| |
| } // anonymous namespace |
| |
| // Makes code slightly more readable. The meaning of "DO(foo)" is |
| // "Execute foo and fail if it fails.", where failure is indicated by |
| // returning false. |
| #define DO(STATEMENT) if (STATEMENT) {} else return false |
| |
| // =================================================================== |
| |
| Parser::Parser() |
| : input_(NULL), |
| error_collector_(NULL), |
| source_location_table_(NULL), |
| had_errors_(false), |
| require_syntax_identifier_(false), |
| stop_after_syntax_identifier_(false) { |
| } |
| |
| Parser::~Parser() { |
| } |
| |
| // =================================================================== |
| |
| inline bool Parser::LookingAt(const char* text) { |
| return input_->current().text == text; |
| } |
| |
| inline bool Parser::LookingAtType(io::Tokenizer::TokenType token_type) { |
| return input_->current().type == token_type; |
| } |
| |
| inline bool Parser::AtEnd() { |
| return LookingAtType(io::Tokenizer::TYPE_END); |
| } |
| |
| bool Parser::TryConsume(const char* text) { |
| if (LookingAt(text)) { |
| input_->Next(); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| bool Parser::Consume(const char* text, const char* error) { |
| if (TryConsume(text)) { |
| return true; |
| } else { |
| AddError(error); |
| return false; |
| } |
| } |
| |
| bool Parser::Consume(const char* text) { |
| if (TryConsume(text)) { |
| return true; |
| } else { |
| AddError("Expected \"" + string(text) + "\"."); |
| return false; |
| } |
| } |
| |
| bool Parser::ConsumeIdentifier(string* output, const char* error) { |
| if (LookingAtType(io::Tokenizer::TYPE_IDENTIFIER)) { |
| *output = input_->current().text; |
| input_->Next(); |
| return true; |
| } else { |
| AddError(error); |
| return false; |
| } |
| } |
| |
| bool Parser::ConsumeInteger(int* output, const char* error) { |
| if (LookingAtType(io::Tokenizer::TYPE_INTEGER)) { |
| uint64 value = 0; |
| if (!io::Tokenizer::ParseInteger(input_->current().text, |
| kint32max, &value)) { |
| AddError("Integer out of range."); |
| // We still return true because we did, in fact, parse an integer. |
| } |
| *output = value; |
| input_->Next(); |
| return true; |
| } else { |
| AddError(error); |
| return false; |
| } |
| } |
| |
| bool Parser::ConsumeSignedInteger(int* output, const char* error) { |
| bool is_negative = false; |
| uint64 max_value = kint32max; |
| if (TryConsume("-")) { |
| is_negative = true; |
| max_value += 1; |
| } |
| uint64 value = 0; |
| DO(ConsumeInteger64(max_value, &value, error)); |
| if (is_negative) value *= -1; |
| *output = value; |
| return true; |
| } |
| |
| bool Parser::ConsumeInteger64(uint64 max_value, uint64* output, |
| const char* error) { |
| if (LookingAtType(io::Tokenizer::TYPE_INTEGER)) { |
| if (!io::Tokenizer::ParseInteger(input_->current().text, max_value, |
| output)) { |
| AddError("Integer out of range."); |
| // We still return true because we did, in fact, parse an integer. |
| *output = 0; |
| } |
| input_->Next(); |
| return true; |
| } else { |
| AddError(error); |
| return false; |
| } |
| } |
| |
| bool Parser::ConsumeNumber(double* output, const char* error) { |
| if (LookingAtType(io::Tokenizer::TYPE_FLOAT)) { |
| *output = io::Tokenizer::ParseFloat(input_->current().text); |
| input_->Next(); |
| return true; |
| } else if (LookingAtType(io::Tokenizer::TYPE_INTEGER)) { |
| // Also accept integers. |
| uint64 value = 0; |
| if (!io::Tokenizer::ParseInteger(input_->current().text, |
| kuint64max, &value)) { |
| AddError("Integer out of range."); |
| // We still return true because we did, in fact, parse a number. |
| } |
| *output = value; |
| input_->Next(); |
| return true; |
| } else if (LookingAt("inf")) { |
| *output = numeric_limits<double>::infinity(); |
| input_->Next(); |
| return true; |
| } else if (LookingAt("nan")) { |
| *output = numeric_limits<double>::quiet_NaN(); |
| input_->Next(); |
| return true; |
| } else { |
| AddError(error); |
| return false; |
| } |
| } |
| |
| bool Parser::ConsumeString(string* output, const char* error) { |
| if (LookingAtType(io::Tokenizer::TYPE_STRING)) { |
| io::Tokenizer::ParseString(input_->current().text, output); |
| input_->Next(); |
| // Allow C++ like concatenation of adjacent string tokens. |
| while (LookingAtType(io::Tokenizer::TYPE_STRING)) { |
| io::Tokenizer::ParseStringAppend(input_->current().text, output); |
| input_->Next(); |
| } |
| return true; |
| } else { |
| AddError(error); |
| return false; |
| } |
| } |
| |
| bool Parser::TryConsumeEndOfDeclaration(const char* text, |
| const LocationRecorder* location) { |
| if (LookingAt(text)) { |
| string leading, trailing; |
| input_->NextWithComments(&trailing, NULL, &leading); |
| |
| // Save the leading comments for next time, and recall the leading comments |
| // from last time. |
| leading.swap(upcoming_doc_comments_); |
| |
| if (location != NULL) { |
| location->AttachComments(&leading, &trailing); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| bool Parser::ConsumeEndOfDeclaration(const char* text, |
| const LocationRecorder* location) { |
| if (TryConsumeEndOfDeclaration(text, location)) { |
| return true; |
| } else { |
| AddError("Expected \"" + string(text) + "\"."); |
| return false; |
| } |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| void Parser::AddError(int line, int column, const string& error) { |
| if (error_collector_ != NULL) { |
| error_collector_->AddError(line, column, error); |
| } |
| had_errors_ = true; |
| } |
| |
| void Parser::AddError(const string& error) { |
| AddError(input_->current().line, input_->current().column, error); |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| Parser::LocationRecorder::LocationRecorder(Parser* parser) |
| : parser_(parser), |
| location_(parser_->source_code_info_->add_location()) { |
| location_->add_span(parser_->input_->current().line); |
| location_->add_span(parser_->input_->current().column); |
| } |
| |
| Parser::LocationRecorder::LocationRecorder(const LocationRecorder& parent) { |
| Init(parent); |
| } |
| |
| Parser::LocationRecorder::LocationRecorder(const LocationRecorder& parent, |
| int path1) { |
| Init(parent); |
| AddPath(path1); |
| } |
| |
| Parser::LocationRecorder::LocationRecorder(const LocationRecorder& parent, |
| int path1, int path2) { |
| Init(parent); |
| AddPath(path1); |
| AddPath(path2); |
| } |
| |
| void Parser::LocationRecorder::Init(const LocationRecorder& parent) { |
| parser_ = parent.parser_; |
| location_ = parser_->source_code_info_->add_location(); |
| location_->mutable_path()->CopyFrom(parent.location_->path()); |
| |
| location_->add_span(parser_->input_->current().line); |
| location_->add_span(parser_->input_->current().column); |
| } |
| |
| Parser::LocationRecorder::~LocationRecorder() { |
| if (location_->span_size() <= 2) { |
| EndAt(parser_->input_->previous()); |
| } |
| } |
| |
| void Parser::LocationRecorder::AddPath(int path_component) { |
| location_->add_path(path_component); |
| } |
| |
| void Parser::LocationRecorder::StartAt(const io::Tokenizer::Token& token) { |
| location_->set_span(0, token.line); |
| location_->set_span(1, token.column); |
| } |
| |
| void Parser::LocationRecorder::EndAt(const io::Tokenizer::Token& token) { |
| if (token.line != location_->span(0)) { |
| location_->add_span(token.line); |
| } |
| location_->add_span(token.end_column); |
| } |
| |
| void Parser::LocationRecorder::RecordLegacyLocation(const Message* descriptor, |
| DescriptorPool::ErrorCollector::ErrorLocation location) { |
| if (parser_->source_location_table_ != NULL) { |
| parser_->source_location_table_->Add( |
| descriptor, location, location_->span(0), location_->span(1)); |
| } |
| } |
| |
| void Parser::LocationRecorder::AttachComments( |
| string* leading, string* trailing) const { |
| GOOGLE_CHECK(!location_->has_leading_comments()); |
| GOOGLE_CHECK(!location_->has_trailing_comments()); |
| |
| if (!leading->empty()) { |
| location_->mutable_leading_comments()->swap(*leading); |
| } |
| if (!trailing->empty()) { |
| location_->mutable_trailing_comments()->swap(*trailing); |
| } |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| void Parser::SkipStatement() { |
| while (true) { |
| if (AtEnd()) { |
| return; |
| } else if (LookingAtType(io::Tokenizer::TYPE_SYMBOL)) { |
| if (TryConsumeEndOfDeclaration(";", NULL)) { |
| return; |
| } else if (TryConsume("{")) { |
| SkipRestOfBlock(); |
| return; |
| } else if (LookingAt("}")) { |
| return; |
| } |
| } |
| input_->Next(); |
| } |
| } |
| |
| void Parser::SkipRestOfBlock() { |
| while (true) { |
| if (AtEnd()) { |
| return; |
| } else if (LookingAtType(io::Tokenizer::TYPE_SYMBOL)) { |
| if (TryConsumeEndOfDeclaration("}", NULL)) { |
| return; |
| } else if (TryConsume("{")) { |
| SkipRestOfBlock(); |
| } |
| } |
| input_->Next(); |
| } |
| } |
| |
| // =================================================================== |
| |
| bool Parser::Parse(io::Tokenizer* input, FileDescriptorProto* file) { |
| input_ = input; |
| had_errors_ = false; |
| syntax_identifier_.clear(); |
| |
| // Note that |file| could be NULL at this point if |
| // stop_after_syntax_identifier_ is true. So, we conservatively allocate |
| // SourceCodeInfo on the stack, then swap it into the FileDescriptorProto |
| // later on. |
| SourceCodeInfo source_code_info; |
| source_code_info_ = &source_code_info; |
| |
| if (LookingAtType(io::Tokenizer::TYPE_START)) { |
| // Advance to first token. |
| input_->NextWithComments(NULL, NULL, &upcoming_doc_comments_); |
| } |
| |
| { |
| LocationRecorder root_location(this); |
| |
| if (require_syntax_identifier_ || LookingAt("syntax")) { |
| if (!ParseSyntaxIdentifier()) { |
| // Don't attempt to parse the file if we didn't recognize the syntax |
| // identifier. |
| return false; |
| } |
| } else if (!stop_after_syntax_identifier_) { |
| syntax_identifier_ = "proto2"; |
| } |
| |
| if (stop_after_syntax_identifier_) return !had_errors_; |
| |
| // Repeatedly parse statements until we reach the end of the file. |
| while (!AtEnd()) { |
| if (!ParseTopLevelStatement(file, root_location)) { |
| // This statement failed to parse. Skip it, but keep looping to parse |
| // other statements. |
| SkipStatement(); |
| |
| if (LookingAt("}")) { |
| AddError("Unmatched \"}\"."); |
| input_->NextWithComments(NULL, NULL, &upcoming_doc_comments_); |
| } |
| } |
| } |
| } |
| |
| input_ = NULL; |
| source_code_info_ = NULL; |
| source_code_info.Swap(file->mutable_source_code_info()); |
| return !had_errors_; |
| } |
| |
| bool Parser::ParseSyntaxIdentifier() { |
| DO(Consume("syntax", "File must begin with 'syntax = \"proto2\";'.")); |
| DO(Consume("=")); |
| io::Tokenizer::Token syntax_token = input_->current(); |
| string syntax; |
| DO(ConsumeString(&syntax, "Expected syntax identifier.")); |
| DO(ConsumeEndOfDeclaration(";", NULL)); |
| |
| syntax_identifier_ = syntax; |
| |
| if (syntax != "proto2" && !stop_after_syntax_identifier_) { |
| AddError(syntax_token.line, syntax_token.column, |
| "Unrecognized syntax identifier \"" + syntax + "\". This parser " |
| "only recognizes \"proto2\"."); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool Parser::ParseTopLevelStatement(FileDescriptorProto* file, |
| const LocationRecorder& root_location) { |
| if (TryConsumeEndOfDeclaration(";", NULL)) { |
| // empty statement; ignore |
| return true; |
| } else if (LookingAt("message")) { |
| LocationRecorder location(root_location, |
| FileDescriptorProto::kMessageTypeFieldNumber, file->message_type_size()); |
| return ParseMessageDefinition(file->add_message_type(), location); |
| } else if (LookingAt("enum")) { |
| LocationRecorder location(root_location, |
| FileDescriptorProto::kEnumTypeFieldNumber, file->enum_type_size()); |
| return ParseEnumDefinition(file->add_enum_type(), location); |
| } else if (LookingAt("service")) { |
| LocationRecorder location(root_location, |
| FileDescriptorProto::kServiceFieldNumber, file->service_size()); |
| return ParseServiceDefinition(file->add_service(), location); |
| } else if (LookingAt("extend")) { |
| LocationRecorder location(root_location, |
| FileDescriptorProto::kExtensionFieldNumber); |
| return ParseExtend(file->mutable_extension(), |
| file->mutable_message_type(), |
| root_location, |
| FileDescriptorProto::kMessageTypeFieldNumber, |
| location); |
| } else if (LookingAt("import")) { |
| return ParseImport(file->mutable_dependency(), |
| file->mutable_public_dependency(), |
| file->mutable_weak_dependency(), |
| root_location); |
| } else if (LookingAt("package")) { |
| return ParsePackage(file, root_location); |
| } else if (LookingAt("option")) { |
| LocationRecorder location(root_location, |
| FileDescriptorProto::kOptionsFieldNumber); |
| return ParseOption(file->mutable_options(), location, OPTION_STATEMENT); |
| } else { |
| AddError("Expected top-level statement (e.g. \"message\")."); |
| return false; |
| } |
| } |
| |
| // ------------------------------------------------------------------- |
| // Messages |
| |
| bool Parser::ParseMessageDefinition(DescriptorProto* message, |
| const LocationRecorder& message_location) { |
| DO(Consume("message")); |
| { |
| LocationRecorder location(message_location, |
| DescriptorProto::kNameFieldNumber); |
| location.RecordLegacyLocation( |
| message, DescriptorPool::ErrorCollector::NAME); |
| DO(ConsumeIdentifier(message->mutable_name(), "Expected message name.")); |
| } |
| DO(ParseMessageBlock(message, message_location)); |
| return true; |
| } |
| |
| namespace { |
| |
| const int kMaxExtensionRangeSentinel = -1; |
| |
| bool IsMessageSetWireFormatMessage(const DescriptorProto& message) { |
| const MessageOptions& options = message.options(); |
| for (int i = 0; i < options.uninterpreted_option_size(); ++i) { |
| const UninterpretedOption& uninterpreted = options.uninterpreted_option(i); |
| if (uninterpreted.name_size() == 1 && |
| uninterpreted.name(0).name_part() == "message_set_wire_format" && |
| uninterpreted.identifier_value() == "true") { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| // Modifies any extension ranges that specified 'max' as the end of the |
| // extension range, and sets them to the type-specific maximum. The actual max |
| // tag number can only be determined after all options have been parsed. |
| void AdjustExtensionRangesWithMaxEndNumber(DescriptorProto* message) { |
| const bool is_message_set = IsMessageSetWireFormatMessage(*message); |
| const int max_extension_number = is_message_set ? |
| kint32max : |
| FieldDescriptor::kMaxNumber + 1; |
| for (int i = 0; i < message->extension_range_size(); ++i) { |
| if (message->extension_range(i).end() == kMaxExtensionRangeSentinel) { |
| message->mutable_extension_range(i)->set_end(max_extension_number); |
| } |
| } |
| } |
| |
| } // namespace |
| |
| bool Parser::ParseMessageBlock(DescriptorProto* message, |
| const LocationRecorder& message_location) { |
| DO(ConsumeEndOfDeclaration("{", &message_location)); |
| |
| while (!TryConsumeEndOfDeclaration("}", NULL)) { |
| if (AtEnd()) { |
| AddError("Reached end of input in message definition (missing '}')."); |
| return false; |
| } |
| |
| if (!ParseMessageStatement(message, message_location)) { |
| // This statement failed to parse. Skip it, but keep looping to parse |
| // other statements. |
| SkipStatement(); |
| } |
| } |
| |
| if (message->extension_range_size() > 0) { |
| AdjustExtensionRangesWithMaxEndNumber(message); |
| } |
| return true; |
| } |
| |
| bool Parser::ParseMessageStatement(DescriptorProto* message, |
| const LocationRecorder& message_location) { |
| if (TryConsumeEndOfDeclaration(";", NULL)) { |
| // empty statement; ignore |
| return true; |
| } else if (LookingAt("message")) { |
| LocationRecorder location(message_location, |
| DescriptorProto::kNestedTypeFieldNumber, |
| message->nested_type_size()); |
| return ParseMessageDefinition(message->add_nested_type(), location); |
| } else if (LookingAt("enum")) { |
| LocationRecorder location(message_location, |
| DescriptorProto::kEnumTypeFieldNumber, |
| message->enum_type_size()); |
| return ParseEnumDefinition(message->add_enum_type(), location); |
| } else if (LookingAt("extensions")) { |
| LocationRecorder location(message_location, |
| DescriptorProto::kExtensionRangeFieldNumber); |
| return ParseExtensions(message, location); |
| } else if (LookingAt("extend")) { |
| LocationRecorder location(message_location, |
| DescriptorProto::kExtensionFieldNumber); |
| return ParseExtend(message->mutable_extension(), |
| message->mutable_nested_type(), |
| message_location, |
| DescriptorProto::kNestedTypeFieldNumber, |
| location); |
| } else if (LookingAt("option")) { |
| LocationRecorder location(message_location, |
| DescriptorProto::kOptionsFieldNumber); |
| return ParseOption(message->mutable_options(), location, OPTION_STATEMENT); |
| } else { |
| LocationRecorder location(message_location, |
| DescriptorProto::kFieldFieldNumber, |
| message->field_size()); |
| return ParseMessageField(message->add_field(), |
| message->mutable_nested_type(), |
| message_location, |
| DescriptorProto::kNestedTypeFieldNumber, |
| location); |
| } |
| } |
| |
| bool Parser::ParseMessageField(FieldDescriptorProto* field, |
| RepeatedPtrField<DescriptorProto>* messages, |
| const LocationRecorder& parent_location, |
| int location_field_number_for_nested_type, |
| const LocationRecorder& field_location) { |
| // Parse label and type. |
| io::Tokenizer::Token label_token = input_->current(); |
| { |
| LocationRecorder location(field_location, |
| FieldDescriptorProto::kLabelFieldNumber); |
| FieldDescriptorProto::Label label; |
| DO(ParseLabel(&label)); |
| field->set_label(label); |
| } |
| |
| { |
| LocationRecorder location(field_location); // add path later |
| location.RecordLegacyLocation(field, DescriptorPool::ErrorCollector::TYPE); |
| |
| FieldDescriptorProto::Type type = FieldDescriptorProto::TYPE_INT32; |
| string type_name; |
| DO(ParseType(&type, &type_name)); |
| if (type_name.empty()) { |
| location.AddPath(FieldDescriptorProto::kTypeFieldNumber); |
| field->set_type(type); |
| } else { |
| location.AddPath(FieldDescriptorProto::kTypeNameFieldNumber); |
| field->set_type_name(type_name); |
| } |
| } |
| |
| // Parse name and '='. |
| io::Tokenizer::Token name_token = input_->current(); |
| { |
| LocationRecorder location(field_location, |
| FieldDescriptorProto::kNameFieldNumber); |
| location.RecordLegacyLocation(field, DescriptorPool::ErrorCollector::NAME); |
| DO(ConsumeIdentifier(field->mutable_name(), "Expected field name.")); |
| } |
| DO(Consume("=", "Missing field number.")); |
| |
| // Parse field number. |
| { |
| LocationRecorder location(field_location, |
| FieldDescriptorProto::kNumberFieldNumber); |
| location.RecordLegacyLocation( |
| field, DescriptorPool::ErrorCollector::NUMBER); |
| int number; |
| DO(ConsumeInteger(&number, "Expected field number.")); |
| field->set_number(number); |
| } |
| |
| // Parse options. |
| DO(ParseFieldOptions(field, field_location)); |
| |
| // Deal with groups. |
| if (field->has_type() && field->type() == FieldDescriptorProto::TYPE_GROUP) { |
| // Awkward: Since a group declares both a message type and a field, we |
| // have to create overlapping locations. |
| LocationRecorder group_location(parent_location); |
| group_location.StartAt(label_token); |
| group_location.AddPath(location_field_number_for_nested_type); |
| group_location.AddPath(messages->size()); |
| |
| DescriptorProto* group = messages->Add(); |
| group->set_name(field->name()); |
| |
| // Record name location to match the field name's location. |
| { |
| LocationRecorder location(group_location, |
| DescriptorProto::kNameFieldNumber); |
| location.StartAt(name_token); |
| location.EndAt(name_token); |
| location.RecordLegacyLocation( |
| group, DescriptorPool::ErrorCollector::NAME); |
| } |
| |
| // The field's type_name also comes from the name. Confusing! |
| { |
| LocationRecorder location(field_location, |
| FieldDescriptorProto::kTypeNameFieldNumber); |
| location.StartAt(name_token); |
| location.EndAt(name_token); |
| } |
| |
| // As a hack for backwards-compatibility, we force the group name to start |
| // with a capital letter and lower-case the field name. New code should |
| // not use groups; it should use nested messages. |
| if (group->name()[0] < 'A' || 'Z' < group->name()[0]) { |
| AddError(name_token.line, name_token.column, |
| "Group names must start with a capital letter."); |
| } |
| LowerString(field->mutable_name()); |
| |
| field->set_type_name(group->name()); |
| if (LookingAt("{")) { |
| DO(ParseMessageBlock(group, group_location)); |
| } else { |
| AddError("Missing group body."); |
| return false; |
| } |
| } else { |
| DO(ConsumeEndOfDeclaration(";", &field_location)); |
| } |
| |
| return true; |
| } |
| |
| bool Parser::ParseFieldOptions(FieldDescriptorProto* field, |
| const LocationRecorder& field_location) { |
| if (!LookingAt("[")) return true; |
| |
| LocationRecorder location(field_location, |
| FieldDescriptorProto::kOptionsFieldNumber); |
| |
| DO(Consume("[")); |
| |
| // Parse field options. |
| do { |
| if (LookingAt("default")) { |
| // We intentionally pass field_location rather than location here, since |
| // the default value is not actually an option. |
| DO(ParseDefaultAssignment(field, field_location)); |
| } else { |
| DO(ParseOption(field->mutable_options(), location, OPTION_ASSIGNMENT)); |
| } |
| } while (TryConsume(",")); |
| |
| DO(Consume("]")); |
| return true; |
| } |
| |
| bool Parser::ParseDefaultAssignment(FieldDescriptorProto* field, |
| const LocationRecorder& field_location) { |
| if (field->has_default_value()) { |
| AddError("Already set option \"default\"."); |
| field->clear_default_value(); |
| } |
| |
| DO(Consume("default")); |
| DO(Consume("=")); |
| |
| LocationRecorder location(field_location, |
| FieldDescriptorProto::kDefaultValueFieldNumber); |
| location.RecordLegacyLocation( |
| field, DescriptorPool::ErrorCollector::DEFAULT_VALUE); |
| string* default_value = field->mutable_default_value(); |
| |
| if (!field->has_type()) { |
| // The field has a type name, but we don't know if it is a message or an |
| // enum yet. Assume an enum for now. |
| DO(ConsumeIdentifier(default_value, "Expected identifier.")); |
| return true; |
| } |
| |
| switch (field->type()) { |
| case FieldDescriptorProto::TYPE_INT32: |
| case FieldDescriptorProto::TYPE_INT64: |
| case FieldDescriptorProto::TYPE_SINT32: |
| case FieldDescriptorProto::TYPE_SINT64: |
| case FieldDescriptorProto::TYPE_SFIXED32: |
| case FieldDescriptorProto::TYPE_SFIXED64: { |
| uint64 max_value = kint64max; |
| if (field->type() == FieldDescriptorProto::TYPE_INT32 || |
| field->type() == FieldDescriptorProto::TYPE_SINT32 || |
| field->type() == FieldDescriptorProto::TYPE_SFIXED32) { |
| max_value = kint32max; |
| } |
| |
| // These types can be negative. |
| if (TryConsume("-")) { |
| default_value->append("-"); |
| // Two's complement always has one more negative value than positive. |
| ++max_value; |
| } |
| // Parse the integer to verify that it is not out-of-range. |
| uint64 value; |
| DO(ConsumeInteger64(max_value, &value, "Expected integer.")); |
| // And stringify it again. |
| default_value->append(SimpleItoa(value)); |
| break; |
| } |
| |
| case FieldDescriptorProto::TYPE_UINT32: |
| case FieldDescriptorProto::TYPE_UINT64: |
| case FieldDescriptorProto::TYPE_FIXED32: |
| case FieldDescriptorProto::TYPE_FIXED64: { |
| uint64 max_value = kuint64max; |
| if (field->type() == FieldDescriptorProto::TYPE_UINT32 || |
| field->type() == FieldDescriptorProto::TYPE_FIXED32) { |
| max_value = kuint32max; |
| } |
| |
| // Numeric, not negative. |
| if (TryConsume("-")) { |
| AddError("Unsigned field can't have negative default value."); |
| } |
| // Parse the integer to verify that it is not out-of-range. |
| uint64 value; |
| DO(ConsumeInteger64(max_value, &value, "Expected integer.")); |
| // And stringify it again. |
| default_value->append(SimpleItoa(value)); |
| break; |
| } |
| |
| case FieldDescriptorProto::TYPE_FLOAT: |
| case FieldDescriptorProto::TYPE_DOUBLE: |
| // These types can be negative. |
| if (TryConsume("-")) { |
| default_value->append("-"); |
| } |
| // Parse the integer because we have to convert hex integers to decimal |
| // floats. |
| double value; |
| DO(ConsumeNumber(&value, "Expected number.")); |
| // And stringify it again. |
| default_value->append(SimpleDtoa(value)); |
| break; |
| |
| case FieldDescriptorProto::TYPE_BOOL: |
| if (TryConsume("true")) { |
| default_value->assign("true"); |
| } else if (TryConsume("false")) { |
| default_value->assign("false"); |
| } else { |
| AddError("Expected \"true\" or \"false\"."); |
| return false; |
| } |
| break; |
| |
| case FieldDescriptorProto::TYPE_STRING: |
| DO(ConsumeString(default_value, "Expected string.")); |
| break; |
| |
| case FieldDescriptorProto::TYPE_BYTES: |
| DO(ConsumeString(default_value, "Expected string.")); |
| *default_value = CEscape(*default_value); |
| break; |
| |
| case FieldDescriptorProto::TYPE_ENUM: |
| DO(ConsumeIdentifier(default_value, "Expected identifier.")); |
| break; |
| |
| case FieldDescriptorProto::TYPE_MESSAGE: |
| case FieldDescriptorProto::TYPE_GROUP: |
| AddError("Messages can't have default values."); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool Parser::ParseOptionNamePart(UninterpretedOption* uninterpreted_option, |
| const LocationRecorder& part_location) { |
| UninterpretedOption::NamePart* name = uninterpreted_option->add_name(); |
| string identifier; // We parse identifiers into this string. |
| if (LookingAt("(")) { // This is an extension. |
| DO(Consume("(")); |
| |
| { |
| LocationRecorder location( |
| part_location, UninterpretedOption::NamePart::kNamePartFieldNumber); |
| // An extension name consists of dot-separated identifiers, and may begin |
| // with a dot. |
| if (LookingAtType(io::Tokenizer::TYPE_IDENTIFIER)) { |
| DO(ConsumeIdentifier(&identifier, "Expected identifier.")); |
| name->mutable_name_part()->append(identifier); |
| } |
| while (LookingAt(".")) { |
| DO(Consume(".")); |
| name->mutable_name_part()->append("."); |
| DO(ConsumeIdentifier(&identifier, "Expected identifier.")); |
| name->mutable_name_part()->append(identifier); |
| } |
| } |
| |
| DO(Consume(")")); |
| name->set_is_extension(true); |
| } else { // This is a regular field. |
| LocationRecorder location( |
| part_location, UninterpretedOption::NamePart::kNamePartFieldNumber); |
| DO(ConsumeIdentifier(&identifier, "Expected identifier.")); |
| name->mutable_name_part()->append(identifier); |
| name->set_is_extension(false); |
| } |
| return true; |
| } |
| |
| bool Parser::ParseUninterpretedBlock(string* value) { |
| // Note that enclosing braces are not added to *value. |
| // We do NOT use ConsumeEndOfStatement for this brace because it's delimiting |
| // an expression, not a block of statements. |
| DO(Consume("{")); |
| int brace_depth = 1; |
| while (!AtEnd()) { |
| if (LookingAt("{")) { |
| brace_depth++; |
| } else if (LookingAt("}")) { |
| brace_depth--; |
| if (brace_depth == 0) { |
| input_->Next(); |
| return true; |
| } |
| } |
| // TODO(sanjay): Interpret line/column numbers to preserve formatting |
| if (!value->empty()) value->push_back(' '); |
| value->append(input_->current().text); |
| input_->Next(); |
| } |
| AddError("Unexpected end of stream while parsing aggregate value."); |
| return false; |
| } |
| |
| // We don't interpret the option here. Instead we store it in an |
| // UninterpretedOption, to be interpreted later. |
| bool Parser::ParseOption(Message* options, |
| const LocationRecorder& options_location, |
| OptionStyle style) { |
| // Create an entry in the uninterpreted_option field. |
| const FieldDescriptor* uninterpreted_option_field = options->GetDescriptor()-> |
| FindFieldByName("uninterpreted_option"); |
| GOOGLE_CHECK(uninterpreted_option_field != NULL) |
| << "No field named \"uninterpreted_option\" in the Options proto."; |
| |
| const Reflection* reflection = options->GetReflection(); |
| |
| LocationRecorder location( |
| options_location, uninterpreted_option_field->number(), |
| reflection->FieldSize(*options, uninterpreted_option_field)); |
| |
| if (style == OPTION_STATEMENT) { |
| DO(Consume("option")); |
| } |
| |
| UninterpretedOption* uninterpreted_option = down_cast<UninterpretedOption*>( |
| options->GetReflection()->AddMessage(options, |
| uninterpreted_option_field)); |
| |
| // Parse dot-separated name. |
| { |
| LocationRecorder name_location(location, |
| UninterpretedOption::kNameFieldNumber); |
| name_location.RecordLegacyLocation( |
| uninterpreted_option, DescriptorPool::ErrorCollector::OPTION_NAME); |
| |
| { |
| LocationRecorder part_location(name_location, |
| uninterpreted_option->name_size()); |
| DO(ParseOptionNamePart(uninterpreted_option, part_location)); |
| } |
| |
| while (LookingAt(".")) { |
| DO(Consume(".")); |
| LocationRecorder part_location(name_location, |
| uninterpreted_option->name_size()); |
| DO(ParseOptionNamePart(uninterpreted_option, part_location)); |
| } |
| } |
| |
| DO(Consume("=")); |
| |
| { |
| LocationRecorder value_location(location); |
| value_location.RecordLegacyLocation( |
| uninterpreted_option, DescriptorPool::ErrorCollector::OPTION_VALUE); |
| |
| // All values are a single token, except for negative numbers, which consist |
| // of a single '-' symbol, followed by a positive number. |
| bool is_negative = TryConsume("-"); |
| |
| switch (input_->current().type) { |
| case io::Tokenizer::TYPE_START: |
| GOOGLE_LOG(FATAL) << "Trying to read value before any tokens have been read."; |
| return false; |
| |
| case io::Tokenizer::TYPE_END: |
| AddError("Unexpected end of stream while parsing option value."); |
| return false; |
| |
| case io::Tokenizer::TYPE_IDENTIFIER: { |
| value_location.AddPath( |
| UninterpretedOption::kIdentifierValueFieldNumber); |
| if (is_negative) { |
| AddError("Invalid '-' symbol before identifier."); |
| return false; |
| } |
| string value; |
| DO(ConsumeIdentifier(&value, "Expected identifier.")); |
| uninterpreted_option->set_identifier_value(value); |
| break; |
| } |
| |
| case io::Tokenizer::TYPE_INTEGER: { |
| uint64 value; |
| uint64 max_value = |
| is_negative ? static_cast<uint64>(kint64max) + 1 : kuint64max; |
| DO(ConsumeInteger64(max_value, &value, "Expected integer.")); |
| if (is_negative) { |
| value_location.AddPath( |
| UninterpretedOption::kNegativeIntValueFieldNumber); |
| uninterpreted_option->set_negative_int_value( |
| -static_cast<int64>(value)); |
| } else { |
| value_location.AddPath( |
| UninterpretedOption::kPositiveIntValueFieldNumber); |
| uninterpreted_option->set_positive_int_value(value); |
| } |
| break; |
| } |
| |
| case io::Tokenizer::TYPE_FLOAT: { |
| value_location.AddPath(UninterpretedOption::kDoubleValueFieldNumber); |
| double value; |
| DO(ConsumeNumber(&value, "Expected number.")); |
| uninterpreted_option->set_double_value(is_negative ? -value : value); |
| break; |
| } |
| |
| case io::Tokenizer::TYPE_STRING: { |
| value_location.AddPath(UninterpretedOption::kStringValueFieldNumber); |
| if (is_negative) { |
| AddError("Invalid '-' symbol before string."); |
| return false; |
| } |
| string value; |
| DO(ConsumeString(&value, "Expected string.")); |
| uninterpreted_option->set_string_value(value); |
| break; |
| } |
| |
| case io::Tokenizer::TYPE_SYMBOL: |
| if (LookingAt("{")) { |
| value_location.AddPath( |
| UninterpretedOption::kAggregateValueFieldNumber); |
| DO(ParseUninterpretedBlock( |
| uninterpreted_option->mutable_aggregate_value())); |
| } else { |
| AddError("Expected option value."); |
| return false; |
| } |
| break; |
| } |
| } |
| |
| if (style == OPTION_STATEMENT) { |
| DO(ConsumeEndOfDeclaration(";", &location)); |
| } |
| |
| return true; |
| } |
| |
| bool Parser::ParseExtensions(DescriptorProto* message, |
| const LocationRecorder& extensions_location) { |
| // Parse the declaration. |
| DO(Consume("extensions")); |
| |
| do { |
| // Note that kExtensionRangeFieldNumber was already pushed by the parent. |
| LocationRecorder location(extensions_location, |
| message->extension_range_size()); |
| |
| DescriptorProto::ExtensionRange* range = message->add_extension_range(); |
| location.RecordLegacyLocation( |
| range, DescriptorPool::ErrorCollector::NUMBER); |
| |
| int start, end; |
| io::Tokenizer::Token start_token; |
| |
| { |
| LocationRecorder start_location( |
| location, DescriptorProto::ExtensionRange::kStartFieldNumber); |
| start_token = input_->current(); |
| DO(ConsumeInteger(&start, "Expected field number range.")); |
| } |
| |
| if (TryConsume("to")) { |
| LocationRecorder end_location( |
| location, DescriptorProto::ExtensionRange::kEndFieldNumber); |
| if (TryConsume("max")) { |
| // Set to the sentinel value - 1 since we increment the value below. |
| // The actual value of the end of the range should be set with |
| // AdjustExtensionRangesWithMaxEndNumber. |
| end = kMaxExtensionRangeSentinel - 1; |
| } else { |
| DO(ConsumeInteger(&end, "Expected integer.")); |
| } |
| } else { |
| LocationRecorder end_location( |
| location, DescriptorProto::ExtensionRange::kEndFieldNumber); |
| end_location.StartAt(start_token); |
| end_location.EndAt(start_token); |
| end = start; |
| } |
| |
| // Users like to specify inclusive ranges, but in code we like the end |
| // number to be exclusive. |
| ++end; |
| |
| range->set_start(start); |
| range->set_end(end); |
| } while (TryConsume(",")); |
| |
| DO(ConsumeEndOfDeclaration(";", &extensions_location)); |
| return true; |
| } |
| |
| bool Parser::ParseExtend(RepeatedPtrField<FieldDescriptorProto>* extensions, |
| RepeatedPtrField<DescriptorProto>* messages, |
| const LocationRecorder& parent_location, |
| int location_field_number_for_nested_type, |
| const LocationRecorder& extend_location) { |
| DO(Consume("extend")); |
| |
| // Parse the extendee type. |
| io::Tokenizer::Token extendee_start = input_->current(); |
| string extendee; |
| DO(ParseUserDefinedType(&extendee)); |
| io::Tokenizer::Token extendee_end = input_->previous(); |
| |
| // Parse the block. |
| DO(ConsumeEndOfDeclaration("{", &extend_location)); |
| |
| bool is_first = true; |
| |
| do { |
| if (AtEnd()) { |
| AddError("Reached end of input in extend definition (missing '}')."); |
| return false; |
| } |
| |
| // Note that kExtensionFieldNumber was already pushed by the parent. |
| LocationRecorder location(extend_location, extensions->size()); |
| |
| FieldDescriptorProto* field = extensions->Add(); |
| |
| { |
| LocationRecorder extendee_location( |
| location, FieldDescriptorProto::kExtendeeFieldNumber); |
| extendee_location.StartAt(extendee_start); |
| extendee_location.EndAt(extendee_end); |
| |
| if (is_first) { |
| extendee_location.RecordLegacyLocation( |
| field, DescriptorPool::ErrorCollector::EXTENDEE); |
| is_first = false; |
| } |
| } |
| |
| field->set_extendee(extendee); |
| |
| if (!ParseMessageField(field, messages, parent_location, |
| location_field_number_for_nested_type, |
| location)) { |
| // This statement failed to parse. Skip it, but keep looping to parse |
| // other statements. |
| SkipStatement(); |
| } |
| } while (!TryConsumeEndOfDeclaration("}", NULL)); |
| |
| return true; |
| } |
| |
| // ------------------------------------------------------------------- |
| // Enums |
| |
| bool Parser::ParseEnumDefinition(EnumDescriptorProto* enum_type, |
| const LocationRecorder& enum_location) { |
| DO(Consume("enum")); |
| |
| { |
| LocationRecorder location(enum_location, |
| EnumDescriptorProto::kNameFieldNumber); |
| location.RecordLegacyLocation( |
| enum_type, DescriptorPool::ErrorCollector::NAME); |
| DO(ConsumeIdentifier(enum_type->mutable_name(), "Expected enum name.")); |
| } |
| |
| DO(ParseEnumBlock(enum_type, enum_location)); |
| return true; |
| } |
| |
| bool Parser::ParseEnumBlock(EnumDescriptorProto* enum_type, |
| const LocationRecorder& enum_location) { |
| DO(ConsumeEndOfDeclaration("{", &enum_location)); |
| |
| while (!TryConsumeEndOfDeclaration("}", NULL)) { |
| if (AtEnd()) { |
| AddError("Reached end of input in enum definition (missing '}')."); |
| return false; |
| } |
| |
| if (!ParseEnumStatement(enum_type, enum_location)) { |
| // This statement failed to parse. Skip it, but keep looping to parse |
| // other statements. |
| SkipStatement(); |
| } |
| } |
| |
| return true; |
| } |
| |
| bool Parser::ParseEnumStatement(EnumDescriptorProto* enum_type, |
| const LocationRecorder& enum_location) { |
| if (TryConsumeEndOfDeclaration(";", NULL)) { |
| // empty statement; ignore |
| return true; |
| } else if (LookingAt("option")) { |
| LocationRecorder location(enum_location, |
| EnumDescriptorProto::kOptionsFieldNumber); |
| return ParseOption(enum_type->mutable_options(), location, |
| OPTION_STATEMENT); |
| } else { |
| LocationRecorder location(enum_location, |
| EnumDescriptorProto::kValueFieldNumber, enum_type->value_size()); |
| return ParseEnumConstant(enum_type->add_value(), location); |
| } |
| } |
| |
| bool Parser::ParseEnumConstant(EnumValueDescriptorProto* enum_value, |
| const LocationRecorder& enum_value_location) { |
| // Parse name. |
| { |
| LocationRecorder location(enum_value_location, |
| EnumValueDescriptorProto::kNameFieldNumber); |
| location.RecordLegacyLocation( |
| enum_value, DescriptorPool::ErrorCollector::NAME); |
| DO(ConsumeIdentifier(enum_value->mutable_name(), |
| "Expected enum constant name.")); |
| } |
| |
| DO(Consume("=", "Missing numeric value for enum constant.")); |
| |
| // Parse value. |
| { |
| LocationRecorder location( |
| enum_value_location, EnumValueDescriptorProto::kNumberFieldNumber); |
| location.RecordLegacyLocation( |
| enum_value, DescriptorPool::ErrorCollector::NUMBER); |
| |
| int number; |
| DO(ConsumeSignedInteger(&number, "Expected integer.")); |
| enum_value->set_number(number); |
| } |
| |
| DO(ParseEnumConstantOptions(enum_value, enum_value_location)); |
| |
| DO(ConsumeEndOfDeclaration(";", &enum_value_location)); |
| |
| return true; |
| } |
| |
| bool Parser::ParseEnumConstantOptions( |
| EnumValueDescriptorProto* value, |
| const LocationRecorder& enum_value_location) { |
| if (!LookingAt("[")) return true; |
| |
| LocationRecorder location( |
| enum_value_location, EnumValueDescriptorProto::kOptionsFieldNumber); |
| |
| DO(Consume("[")); |
| |
| do { |
| DO(ParseOption(value->mutable_options(), location, OPTION_ASSIGNMENT)); |
| } while (TryConsume(",")); |
| |
| DO(Consume("]")); |
| return true; |
| } |
| |
| // ------------------------------------------------------------------- |
| // Services |
| |
| bool Parser::ParseServiceDefinition(ServiceDescriptorProto* service, |
| const LocationRecorder& service_location) { |
| DO(Consume("service")); |
| |
| { |
| LocationRecorder location(service_location, |
| ServiceDescriptorProto::kNameFieldNumber); |
| location.RecordLegacyLocation( |
| service, DescriptorPool::ErrorCollector::NAME); |
| DO(ConsumeIdentifier(service->mutable_name(), "Expected service name.")); |
| } |
| |
| DO(ParseServiceBlock(service, service_location)); |
| return true; |
| } |
| |
| bool Parser::ParseServiceBlock(ServiceDescriptorProto* service, |
| const LocationRecorder& service_location) { |
| DO(ConsumeEndOfDeclaration("{", &service_location)); |
| |
| while (!TryConsumeEndOfDeclaration("}", NULL)) { |
| if (AtEnd()) { |
| AddError("Reached end of input in service definition (missing '}')."); |
| return false; |
| } |
| |
| if (!ParseServiceStatement(service, service_location)) { |
| // This statement failed to parse. Skip it, but keep looping to parse |
| // other statements. |
| SkipStatement(); |
| } |
| } |
| |
| return true; |
| } |
| |
| bool Parser::ParseServiceStatement(ServiceDescriptorProto* service, |
| const LocationRecorder& service_location) { |
| if (TryConsumeEndOfDeclaration(";", NULL)) { |
| // empty statement; ignore |
| return true; |
| } else if (LookingAt("option")) { |
| LocationRecorder location( |
| service_location, ServiceDescriptorProto::kOptionsFieldNumber); |
| return ParseOption(service->mutable_options(), location, OPTION_STATEMENT); |
| } else { |
| LocationRecorder location(service_location, |
| ServiceDescriptorProto::kMethodFieldNumber, service->method_size()); |
| return ParseServiceMethod(service->add_method(), location); |
| } |
| } |
| |
| bool Parser::ParseServiceMethod(MethodDescriptorProto* method, |
| const LocationRecorder& method_location) { |
| DO(Consume("rpc")); |
| |
| { |
| LocationRecorder location(method_location, |
| MethodDescriptorProto::kNameFieldNumber); |
| location.RecordLegacyLocation( |
| method, DescriptorPool::ErrorCollector::NAME); |
| DO(ConsumeIdentifier(method->mutable_name(), "Expected method name.")); |
| } |
| |
| // Parse input type. |
| DO(Consume("(")); |
| { |
| LocationRecorder location(method_location, |
| MethodDescriptorProto::kInputTypeFieldNumber); |
| location.RecordLegacyLocation( |
| method, DescriptorPool::ErrorCollector::INPUT_TYPE); |
| DO(ParseUserDefinedType(method->mutable_input_type())); |
| } |
| DO(Consume(")")); |
| |
| // Parse output type. |
| DO(Consume("returns")); |
| DO(Consume("(")); |
| { |
| LocationRecorder location(method_location, |
| MethodDescriptorProto::kOutputTypeFieldNumber); |
| location.RecordLegacyLocation( |
| method, DescriptorPool::ErrorCollector::OUTPUT_TYPE); |
| DO(ParseUserDefinedType(method->mutable_output_type())); |
| } |
| DO(Consume(")")); |
| |
| if (LookingAt("{")) { |
| // Options! |
| DO(ParseOptions(method_location, |
| MethodDescriptorProto::kOptionsFieldNumber, |
| method->mutable_options())); |
| } else { |
| DO(ConsumeEndOfDeclaration(";", &method_location)); |
| } |
| |
| return true; |
| } |
| |
| |
| bool Parser::ParseOptions(const LocationRecorder& parent_location, |
| const int optionsFieldNumber, |
| Message* mutable_options) { |
| // Options! |
| ConsumeEndOfDeclaration("{", &parent_location); |
| while (!TryConsumeEndOfDeclaration("}", NULL)) { |
| if (AtEnd()) { |
| AddError("Reached end of input in method options (missing '}')."); |
| return false; |
| } |
| |
| if (TryConsumeEndOfDeclaration(";", NULL)) { |
| // empty statement; ignore |
| } else { |
| LocationRecorder location(parent_location, |
| optionsFieldNumber); |
| if (!ParseOption(mutable_options, location, OPTION_STATEMENT)) { |
| // This statement failed to parse. Skip it, but keep looping to |
| // parse other statements. |
| SkipStatement(); |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| bool Parser::ParseLabel(FieldDescriptorProto::Label* label) { |
| if (TryConsume("optional")) { |
| *label = FieldDescriptorProto::LABEL_OPTIONAL; |
| return true; |
| } else if (TryConsume("repeated")) { |
| *label = FieldDescriptorProto::LABEL_REPEATED; |
| return true; |
| } else if (TryConsume("required")) { |
| *label = FieldDescriptorProto::LABEL_REQUIRED; |
| return true; |
| } else { |
| AddError("Expected \"required\", \"optional\", or \"repeated\"."); |
| // We can actually reasonably recover here by just assuming the user |
| // forgot the label altogether. |
| *label = FieldDescriptorProto::LABEL_OPTIONAL; |
| return true; |
| } |
| } |
| |
| bool Parser::ParseType(FieldDescriptorProto::Type* type, |
| string* type_name) { |
| TypeNameMap::const_iterator iter = kTypeNames.find(input_->current().text); |
| if (iter != kTypeNames.end()) { |
| *type = iter->second; |
| input_->Next(); |
| } else { |
| DO(ParseUserDefinedType(type_name)); |
| } |
| return true; |
| } |
| |
| bool Parser::ParseUserDefinedType(string* type_name) { |
| type_name->clear(); |
| |
| TypeNameMap::const_iterator iter = kTypeNames.find(input_->current().text); |
| if (iter != kTypeNames.end()) { |
| // Note: The only place enum types are allowed is for field types, but |
| // if we are parsing a field type then we would not get here because |
| // primitives are allowed there as well. So this error message doesn't |
| // need to account for enums. |
| AddError("Expected message type."); |
| |
| // Pretend to accept this type so that we can go on parsing. |
| *type_name = input_->current().text; |
| input_->Next(); |
| return true; |
| } |
| |
| // A leading "." means the name is fully-qualified. |
| if (TryConsume(".")) type_name->append("."); |
| |
| // Consume the first part of the name. |
| string identifier; |
| DO(ConsumeIdentifier(&identifier, "Expected type name.")); |
| type_name->append(identifier); |
| |
| // Consume more parts. |
| while (TryConsume(".")) { |
| type_name->append("."); |
| DO(ConsumeIdentifier(&identifier, "Expected identifier.")); |
| type_name->append(identifier); |
| } |
| |
| return true; |
| } |
| |
| // =================================================================== |
| |
| bool Parser::ParsePackage(FileDescriptorProto* file, |
| const LocationRecorder& root_location) { |
| if (file->has_package()) { |
| AddError("Multiple package definitions."); |
| // Don't append the new package to the old one. Just replace it. Not |
| // that it really matters since this is an error anyway. |
| file->clear_package(); |
| } |
| |
| DO(Consume("package")); |
| |
| { |
| LocationRecorder location(root_location, |
| FileDescriptorProto::kPackageFieldNumber); |
| location.RecordLegacyLocation(file, DescriptorPool::ErrorCollector::NAME); |
| |
| while (true) { |
| string identifier; |
| DO(ConsumeIdentifier(&identifier, "Expected identifier.")); |
| file->mutable_package()->append(identifier); |
| if (!TryConsume(".")) break; |
| file->mutable_package()->append("."); |
| } |
| |
| location.EndAt(input_->previous()); |
| |
| DO(ConsumeEndOfDeclaration(";", &location)); |
| } |
| |
| return true; |
| } |
| |
| bool Parser::ParseImport(RepeatedPtrField<string>* dependency, |
| RepeatedField<int32>* public_dependency, |
| RepeatedField<int32>* weak_dependency, |
| const LocationRecorder& root_location) { |
| DO(Consume("import")); |
| if (LookingAt("public")) { |
| LocationRecorder location( |
| root_location, FileDescriptorProto::kPublicDependencyFieldNumber, |
| public_dependency->size()); |
| DO(Consume("public")); |
| *public_dependency->Add() = dependency->size(); |
| } else if (LookingAt("weak")) { |
| LocationRecorder location( |
| root_location, FileDescriptorProto::kWeakDependencyFieldNumber, |
| weak_dependency->size()); |
| DO(Consume("weak")); |
| *weak_dependency->Add() = dependency->size(); |
| } |
| { |
| LocationRecorder location(root_location, |
| FileDescriptorProto::kDependencyFieldNumber, |
| dependency->size()); |
| DO(ConsumeString(dependency->Add(), |
| "Expected a string naming the file to import.")); |
| |
| location.EndAt(input_->previous()); |
| |
| DO(ConsumeEndOfDeclaration(";", &location)); |
| } |
| return true; |
| } |
| |
| // =================================================================== |
| |
| SourceLocationTable::SourceLocationTable() {} |
| SourceLocationTable::~SourceLocationTable() {} |
| |
| bool SourceLocationTable::Find( |
| const Message* descriptor, |
| DescriptorPool::ErrorCollector::ErrorLocation location, |
| int* line, int* column) const { |
| const pair<int, int>* result = |
| FindOrNull(location_map_, make_pair(descriptor, location)); |
| if (result == NULL) { |
| *line = -1; |
| *column = 0; |
| return false; |
| } else { |
| *line = result->first; |
| *column = result->second; |
| return true; |
| } |
| } |
| |
| void SourceLocationTable::Add( |
| const Message* descriptor, |
| DescriptorPool::ErrorCollector::ErrorLocation location, |
| int line, int column) { |
| location_map_[make_pair(descriptor, location)] = make_pair(line, column); |
| } |
| |
| void SourceLocationTable::Clear() { |
| location_map_.clear(); |
| } |
| |
| } // namespace compiler |
| } // namespace protobuf |
| } // namespace google |
