1668 lines
66 KiB
C++
1668 lines
66 KiB
C++
/*
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* Copyright 2014 Google Inc. All rights reserved.
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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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*/
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// independent from idl_parser, since this code is not needed for most clients
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#include "flatbuffers/code_generators.h"
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#include "flatbuffers/flatbuffers.h"
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#include "flatbuffers/idl.h"
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#include "flatbuffers/util.h"
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#if defined(FLATBUFFERS_CPP98_STL)
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# include <cctype>
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#endif // defined(FLATBUFFERS_CPP98_STL)
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namespace flatbuffers {
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// These arrays need to correspond to the IDLOptions::k enum.
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struct LanguageParameters {
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IDLOptions::Language language;
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// Whether function names in the language typically start with uppercase.
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bool first_camel_upper;
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std::string file_extension;
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std::string string_type;
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std::string bool_type;
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std::string open_curly;
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std::string accessor_type;
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std::string const_decl;
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std::string unsubclassable_decl;
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std::string enum_decl;
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std::string enum_separator;
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std::string getter_prefix;
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std::string getter_suffix;
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std::string inheritance_marker;
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std::string namespace_ident;
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std::string namespace_begin;
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std::string namespace_end;
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std::string set_bb_byteorder;
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std::string get_bb_position;
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std::string get_fbb_offset;
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std::string accessor_prefix;
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std::string accessor_prefix_static;
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std::string optional_suffix;
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std::string includes;
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std::string class_annotation;
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std::string generated_type_annotation;
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CommentConfig comment_config;
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const FloatConstantGenerator *float_gen;
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};
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const LanguageParameters &GetLangParams(IDLOptions::Language lang) {
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static TypedFloatConstantGenerator CSharpFloatGen(
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"Double.", "Single.", "NaN", "PositiveInfinity", "NegativeInfinity");
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static TypedFloatConstantGenerator JavaFloatGen(
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"Double.", "Float.", "NaN", "POSITIVE_INFINITY", "NEGATIVE_INFINITY");
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static const LanguageParameters language_parameters[] = {
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{
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IDLOptions::kJava,
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false,
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".java",
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"String",
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"boolean ",
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" {\n",
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"class ",
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" final ",
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"final ",
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"final class ",
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";\n",
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"()",
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"",
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" extends ",
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"package ",
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";",
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"",
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"_bb.order(ByteOrder.LITTLE_ENDIAN); ",
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"position()",
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"offset()",
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"",
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"",
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"",
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"import java.nio.*;\nimport java.lang.*;\nimport "
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"java.util.*;\nimport com.google.flatbuffers.*;\n",
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"\n@SuppressWarnings(\"unused\")\n",
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"\n@javax.annotation.Generated(value=\"flatc\")\n",
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{
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"/**",
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" *",
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" */",
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},
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&JavaFloatGen
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},
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{
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IDLOptions::kCSharp,
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true,
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".cs",
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"string",
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"bool ",
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"\n{\n",
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"struct ",
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" readonly ",
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"",
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"enum ",
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",\n",
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" { get",
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"} ",
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" : ",
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"namespace ",
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"\n{",
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"\n}\n",
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"",
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"Position",
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"Offset",
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"__p.",
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"Table.",
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"?",
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"using global::System;\nusing global::FlatBuffers;\n\n",
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"",
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"",
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{
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nullptr,
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"///",
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nullptr,
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},
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&CSharpFloatGen
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},
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};
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if (lang == IDLOptions::kJava) {
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return language_parameters[0];
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} else {
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FLATBUFFERS_ASSERT(lang == IDLOptions::kCSharp);
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return language_parameters[1];
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}
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}
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namespace general {
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class GeneralGenerator : public BaseGenerator {
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public:
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GeneralGenerator(const Parser &parser, const std::string &path,
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const std::string &file_name)
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: BaseGenerator(parser, path, file_name, "", "."),
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lang_(GetLangParams(parser_.opts.lang)),
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cur_name_space_(nullptr) {}
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GeneralGenerator &operator=(const GeneralGenerator &);
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bool generate() {
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std::string one_file_code;
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cur_name_space_ = parser_.current_namespace_;
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for (auto it = parser_.enums_.vec.begin(); it != parser_.enums_.vec.end();
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++it) {
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std::string enumcode;
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auto &enum_def = **it;
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if (!parser_.opts.one_file) cur_name_space_ = enum_def.defined_namespace;
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GenEnum(enum_def, &enumcode);
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if (parser_.opts.one_file) {
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one_file_code += enumcode;
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} else {
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if (!SaveType(enum_def.name, *enum_def.defined_namespace, enumcode,
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false))
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return false;
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}
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}
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for (auto it = parser_.structs_.vec.begin();
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it != parser_.structs_.vec.end(); ++it) {
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std::string declcode;
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auto &struct_def = **it;
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if (!parser_.opts.one_file)
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cur_name_space_ = struct_def.defined_namespace;
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GenStruct(struct_def, &declcode);
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if (parser_.opts.one_file) {
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one_file_code += declcode;
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} else {
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if (!SaveType(struct_def.name, *struct_def.defined_namespace, declcode,
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true))
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return false;
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}
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}
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if (parser_.opts.one_file) {
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return SaveType(file_name_, *parser_.current_namespace_, one_file_code,
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true);
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}
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return true;
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}
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// Save out the generated code for a single class while adding
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// declaration boilerplate.
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bool SaveType(const std::string &defname, const Namespace &ns,
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const std::string &classcode, bool needs_includes) const {
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if (!classcode.length()) return true;
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std::string code;
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if (lang_.language == IDLOptions::kCSharp) {
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code =
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"// <auto-generated>\n"
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"// " +
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std::string(FlatBuffersGeneratedWarning()) +
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"\n"
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"// </auto-generated>\n\n";
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} else {
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code = "// " + std::string(FlatBuffersGeneratedWarning()) + "\n\n";
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}
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std::string namespace_name = FullNamespace(".", ns);
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if (!namespace_name.empty()) {
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code += lang_.namespace_ident + namespace_name + lang_.namespace_begin;
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code += "\n\n";
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}
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if (needs_includes) {
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code += lang_.includes;
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if (parser_.opts.gen_nullable) {
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code += "\nimport javax.annotation.Nullable;\n";
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}
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code += lang_.class_annotation;
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}
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if (parser_.opts.gen_generated) {
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code += lang_.generated_type_annotation;
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}
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code += classcode;
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if (!namespace_name.empty()) code += lang_.namespace_end;
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auto filename = NamespaceDir(ns) + defname + lang_.file_extension;
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return SaveFile(filename.c_str(), code, false);
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}
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const Namespace *CurrentNameSpace() const { return cur_name_space_; }
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std::string FunctionStart(char upper) const {
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return std::string() + (lang_.language == IDLOptions::kJava
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? static_cast<char>(tolower(upper))
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: upper);
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}
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std::string GenNullableAnnotation(const Type &t) const {
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return lang_.language == IDLOptions::kJava && parser_.opts.gen_nullable &&
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!IsScalar(DestinationType(t, true).base_type)
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? " @Nullable "
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: "";
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}
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std::string GenTypeBasic(const Type &type, bool enableLangOverrides) const {
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// clang-format off
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static const char * const java_typename[] = {
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#define FLATBUFFERS_TD(ENUM, IDLTYPE, \
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CTYPE, JTYPE, GTYPE, NTYPE, PTYPE, RTYPE, KTYPE) \
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#JTYPE,
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FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
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#undef FLATBUFFERS_TD
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};
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static const char * const csharp_typename[] = {
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#define FLATBUFFERS_TD(ENUM, IDLTYPE, \
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CTYPE, JTYPE, GTYPE, NTYPE, PTYPE, RTYPE, KTYPE) \
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#NTYPE,
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FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
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#undef FLATBUFFERS_TD
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};
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// clang-format on
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if (enableLangOverrides) {
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if (lang_.language == IDLOptions::kCSharp) {
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if (IsEnum(type)) return WrapInNameSpace(*type.enum_def);
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if (type.base_type == BASE_TYPE_STRUCT) {
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return "Offset<" + WrapInNameSpace(*type.struct_def) + ">";
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}
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}
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}
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if (lang_.language == IDLOptions::kJava) {
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return java_typename[type.base_type];
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} else {
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FLATBUFFERS_ASSERT(lang_.language == IDLOptions::kCSharp);
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return csharp_typename[type.base_type];
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}
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}
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std::string GenTypeBasic(const Type &type) const {
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return GenTypeBasic(type, true);
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}
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std::string GenTypePointer(const Type &type) const {
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switch (type.base_type) {
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case BASE_TYPE_STRING: return lang_.string_type;
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case BASE_TYPE_VECTOR: return GenTypeGet(type.VectorType());
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case BASE_TYPE_STRUCT: return WrapInNameSpace(*type.struct_def);
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case BASE_TYPE_UNION:
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// Unions in C# use a generic Table-derived type for better type safety
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if (lang_.language == IDLOptions::kCSharp) return "TTable";
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FLATBUFFERS_FALLTHROUGH(); // else fall thru
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default: return "Table";
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}
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}
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std::string GenTypeGet(const Type &type) const {
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return IsScalar(type.base_type)
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? GenTypeBasic(type)
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: (IsArray(type) ? GenTypeGet(type.VectorType())
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: GenTypePointer(type));
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}
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// Find the destination type the user wants to receive the value in (e.g.
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// one size higher signed types for unsigned serialized values in Java).
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Type DestinationType(const Type &type, bool vectorelem) const {
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if (lang_.language != IDLOptions::kJava) return type;
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switch (type.base_type) {
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// We use int for both uchar/ushort, since that generally means less
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// casting than using short for uchar.
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case BASE_TYPE_UCHAR: return Type(BASE_TYPE_INT);
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case BASE_TYPE_USHORT: return Type(BASE_TYPE_INT);
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case BASE_TYPE_UINT: return Type(BASE_TYPE_LONG);
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case BASE_TYPE_ARRAY:
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case BASE_TYPE_VECTOR:
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if (vectorelem) return DestinationType(type.VectorType(), vectorelem);
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FLATBUFFERS_FALLTHROUGH(); // else fall thru
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default: return type;
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}
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}
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std::string GenOffsetType(const StructDef &struct_def) const {
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if (lang_.language == IDLOptions::kCSharp) {
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return "Offset<" + WrapInNameSpace(struct_def) + ">";
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} else {
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return "int";
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}
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}
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std::string GenOffsetConstruct(const StructDef &struct_def,
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const std::string &variable_name) const {
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if (lang_.language == IDLOptions::kCSharp) {
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return "new Offset<" + WrapInNameSpace(struct_def) + ">(" +
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variable_name + ")";
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}
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return variable_name;
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}
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std::string GenVectorOffsetType() const {
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if (lang_.language == IDLOptions::kCSharp) {
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return "VectorOffset";
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} else {
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return "int";
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}
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}
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// Generate destination type name
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std::string GenTypeNameDest(const Type &type) const {
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return GenTypeGet(DestinationType(type, true));
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}
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// Mask to turn serialized value into destination type value.
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std::string DestinationMask(const Type &type, bool vectorelem) const {
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if (lang_.language != IDLOptions::kJava) return "";
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switch (type.base_type) {
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case BASE_TYPE_UCHAR: return " & 0xFF";
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case BASE_TYPE_USHORT: return " & 0xFFFF";
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case BASE_TYPE_UINT: return " & 0xFFFFFFFFL";
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case BASE_TYPE_VECTOR:
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if (vectorelem) return DestinationMask(type.VectorType(), vectorelem);
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FLATBUFFERS_FALLTHROUGH(); // else fall thru
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default: return "";
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}
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}
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// Casts necessary to correctly read serialized data
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std::string DestinationCast(const Type &type) const {
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if (IsSeries(type)) {
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return DestinationCast(type.VectorType());
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} else {
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switch (lang_.language) {
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case IDLOptions::kJava:
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// Cast necessary to correctly read serialized unsigned values.
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if (type.base_type == BASE_TYPE_UINT) return "(long)";
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break;
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case IDLOptions::kCSharp:
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// Cast from raw integral types to enum.
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if (IsEnum(type)) return "(" + WrapInNameSpace(*type.enum_def) + ")";
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break;
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default: break;
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}
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}
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return "";
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}
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// Cast statements for mutator method parameters.
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// In Java, parameters representing unsigned numbers need to be cast down to
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// their respective type. For example, a long holding an unsigned int value
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// would be cast down to int before being put onto the buffer. In C#, one cast
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// directly cast an Enum to its underlying type, which is essential before
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// putting it onto the buffer.
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std::string SourceCast(const Type &type, bool castFromDest) const {
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if (IsSeries(type)) {
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return SourceCast(type.VectorType(), castFromDest);
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} else {
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switch (lang_.language) {
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case IDLOptions::kJava:
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if (castFromDest) {
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if (type.base_type == BASE_TYPE_UINT)
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return "(int)";
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else if (type.base_type == BASE_TYPE_USHORT)
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return "(short)";
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else if (type.base_type == BASE_TYPE_UCHAR)
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return "(byte)";
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}
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break;
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case IDLOptions::kCSharp:
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if (IsEnum(type)) return "(" + GenTypeBasic(type, false) + ")";
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break;
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default: break;
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}
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}
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return "";
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}
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std::string SourceCast(const Type &type) const { return SourceCast(type, true); }
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std::string SourceCastBasic(const Type &type, bool castFromDest) const {
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return IsScalar(type.base_type) ? SourceCast(type, castFromDest) : "";
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}
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std::string SourceCastBasic(const Type &type) const {
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return SourceCastBasic(type, true);
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}
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std::string GenEnumDefaultValue(const FieldDef &field) const {
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auto &value = field.value;
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FLATBUFFERS_ASSERT(value.type.enum_def);
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auto &enum_def = *value.type.enum_def;
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auto enum_val = enum_def.FindByValue(value.constant);
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return enum_val ? (WrapInNameSpace(enum_def) + "." + enum_val->name)
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: value.constant;
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}
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std::string GenDefaultValue(const FieldDef &field, bool enableLangOverrides) const {
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auto& value = field.value;
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if (enableLangOverrides) {
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// handles both enum case and vector of enum case
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if (lang_.language == IDLOptions::kCSharp &&
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value.type.enum_def != nullptr &&
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value.type.base_type != BASE_TYPE_UNION) {
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return GenEnumDefaultValue(field);
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}
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}
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auto longSuffix = lang_.language == IDLOptions::kJava ? "L" : "";
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switch (value.type.base_type) {
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case BASE_TYPE_BOOL: return value.constant == "0" ? "false" : "true";
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case BASE_TYPE_ULONG: {
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if (lang_.language != IDLOptions::kJava) return value.constant;
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// Converts the ulong into its bits signed equivalent
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uint64_t defaultValue = StringToUInt(value.constant.c_str());
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return NumToString(static_cast<int64_t>(defaultValue)) + longSuffix;
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}
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case BASE_TYPE_UINT:
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case BASE_TYPE_LONG: return value.constant + longSuffix;
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default:
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if(IsFloat(value.type.base_type))
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return lang_.float_gen->GenFloatConstant(field);
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else
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return value.constant;
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}
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}
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std::string GenDefaultValue(const FieldDef &field) const {
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return GenDefaultValue(field, true);
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}
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std::string GenDefaultValueBasic(const FieldDef &field,
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bool enableLangOverrides) const {
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auto& value = field.value;
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if (!IsScalar(value.type.base_type)) {
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if (enableLangOverrides) {
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if (lang_.language == IDLOptions::kCSharp) {
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switch (value.type.base_type) {
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case BASE_TYPE_STRING: return "default(StringOffset)";
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case BASE_TYPE_STRUCT:
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return "default(Offset<" +
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WrapInNameSpace(*value.type.struct_def) + ">)";
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case BASE_TYPE_VECTOR: return "default(VectorOffset)";
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default: break;
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}
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}
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}
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return "0";
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}
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return GenDefaultValue(field, enableLangOverrides);
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}
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std::string GenDefaultValueBasic(const FieldDef &field) const {
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return GenDefaultValueBasic(field, true);
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}
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void GenEnum(EnumDef &enum_def, std::string *code_ptr) const {
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std::string &code = *code_ptr;
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if (enum_def.generated) return;
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|
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// Generate enum definitions of the form:
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// public static (final) int name = value;
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// In Java, we use ints rather than the Enum feature, because we want them
|
|
// to map directly to how they're used in C/C++ and file formats.
|
|
// That, and Java Enums are expensive, and not universally liked.
|
|
GenComment(enum_def.doc_comment, code_ptr, &lang_.comment_config);
|
|
|
|
// In C# this indicates enumeration values can be treated as bit flags.
|
|
if (lang_.language == IDLOptions::kCSharp && enum_def.attributes.Lookup("bit_flags")) {
|
|
code += "[System.FlagsAttribute]\n";
|
|
}
|
|
if (enum_def.attributes.Lookup("private")) {
|
|
// For Java, we leave the enum unmarked to indicate package-private
|
|
// For C# we mark the enum as internal
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += "internal ";
|
|
}
|
|
} else {
|
|
code += "public ";
|
|
}
|
|
code += lang_.enum_decl + enum_def.name;
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += lang_.inheritance_marker +
|
|
GenTypeBasic(enum_def.underlying_type, false);
|
|
}
|
|
code += lang_.open_curly;
|
|
if (lang_.language == IDLOptions::kJava) {
|
|
code += " private " + enum_def.name + "() { }\n";
|
|
}
|
|
for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); ++it) {
|
|
auto &ev = **it;
|
|
GenComment(ev.doc_comment, code_ptr, &lang_.comment_config, " ");
|
|
if (lang_.language != IDLOptions::kCSharp) {
|
|
code += " public static";
|
|
code += lang_.const_decl;
|
|
code += GenTypeBasic(enum_def.underlying_type, false);
|
|
}
|
|
code += (lang_.language == IDLOptions::kJava) ? " " : " ";
|
|
code += ev.name + " = ";
|
|
code += enum_def.ToString(ev);
|
|
code += lang_.enum_separator;
|
|
}
|
|
|
|
// Generate a generate string table for enum values.
|
|
// We do not do that for C# where this functionality is native.
|
|
if (lang_.language != IDLOptions::kCSharp) {
|
|
// Problem is, if values are very sparse that could generate really big
|
|
// tables. Ideally in that case we generate a map lookup instead, but for
|
|
// the moment we simply don't output a table at all.
|
|
auto range = enum_def.Distance();
|
|
// Average distance between values above which we consider a table
|
|
// "too sparse". Change at will.
|
|
static const uint64_t kMaxSparseness = 5;
|
|
if (range / static_cast<uint64_t>(enum_def.size()) < kMaxSparseness) {
|
|
code += "\n public static";
|
|
code += lang_.const_decl;
|
|
code += lang_.string_type;
|
|
code += "[] names = { ";
|
|
auto val = enum_def.Vals().front();
|
|
for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
|
|
++it) {
|
|
auto ev = *it;
|
|
for (auto k = enum_def.Distance(val, ev); k > 1; --k)
|
|
code += "\"\", ";
|
|
val = ev;
|
|
code += "\"" + (*it)->name + "\", ";
|
|
}
|
|
code += "};\n\n";
|
|
code += " public static ";
|
|
code += lang_.string_type;
|
|
code += " " + MakeCamel("name", lang_.first_camel_upper);
|
|
code += "(int e) { return names[e";
|
|
if (enum_def.MinValue()->IsNonZero())
|
|
code += " - " + enum_def.MinValue()->name;
|
|
code += "]; }\n";
|
|
}
|
|
}
|
|
|
|
// Close the class
|
|
code += "}";
|
|
// Java does not need the closing semi-colon on class definitions.
|
|
code += (lang_.language != IDLOptions::kJava) ? ";" : "";
|
|
code += "\n\n";
|
|
}
|
|
|
|
// Returns the function name that is able to read a value of the given type.
|
|
std::string GenGetter(const Type &type) const {
|
|
switch (type.base_type) {
|
|
case BASE_TYPE_STRING: return lang_.accessor_prefix + "__string";
|
|
case BASE_TYPE_STRUCT: return lang_.accessor_prefix + "__struct";
|
|
case BASE_TYPE_UNION: return lang_.accessor_prefix + "__union";
|
|
case BASE_TYPE_VECTOR: return GenGetter(type.VectorType());
|
|
case BASE_TYPE_ARRAY: return GenGetter(type.VectorType());
|
|
default: {
|
|
std::string getter =
|
|
lang_.accessor_prefix + "bb." + FunctionStart('G') + "et";
|
|
if (type.base_type == BASE_TYPE_BOOL) {
|
|
getter = "0!=" + getter;
|
|
} else if (GenTypeBasic(type, false) != "byte") {
|
|
getter += MakeCamel(GenTypeBasic(type, false));
|
|
}
|
|
return getter;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Returns the function name that is able to read a value of the given type.
|
|
std::string GenGetterForLookupByKey(flatbuffers::FieldDef *key_field,
|
|
const std::string &data_buffer,
|
|
const char *num = nullptr) const {
|
|
auto type = key_field->value.type;
|
|
auto dest_mask = DestinationMask(type, true);
|
|
auto dest_cast = DestinationCast(type);
|
|
auto getter = data_buffer + "." + FunctionStart('G') + "et";
|
|
if (GenTypeBasic(type, false) != "byte") {
|
|
getter += MakeCamel(GenTypeBasic(type, false));
|
|
}
|
|
getter = dest_cast + getter + "(" + GenOffsetGetter(key_field, num) + ")" +
|
|
dest_mask;
|
|
return getter;
|
|
}
|
|
|
|
// Direct mutation is only allowed for scalar fields.
|
|
// Hence a setter method will only be generated for such fields.
|
|
std::string GenSetter(const Type &type) const {
|
|
if (IsScalar(type.base_type)) {
|
|
std::string setter =
|
|
lang_.accessor_prefix + "bb." + FunctionStart('P') + "ut";
|
|
if (GenTypeBasic(type, false) != "byte" &&
|
|
type.base_type != BASE_TYPE_BOOL) {
|
|
setter += MakeCamel(GenTypeBasic(type, false));
|
|
}
|
|
return setter;
|
|
} else {
|
|
return "";
|
|
}
|
|
}
|
|
|
|
// Returns the method name for use with add/put calls.
|
|
std::string GenMethod(const Type &type) const {
|
|
return IsScalar(type.base_type) ? MakeCamel(GenTypeBasic(type, false))
|
|
: (IsStruct(type) ? "Struct" : "Offset");
|
|
}
|
|
|
|
// Recursively generate arguments for a constructor, to deal with nested
|
|
// structs.
|
|
void GenStructArgs(const StructDef &struct_def, std::string *code_ptr,
|
|
const char *nameprefix, size_t array_count = 0) const {
|
|
std::string &code = *code_ptr;
|
|
for (auto it = struct_def.fields.vec.begin();
|
|
it != struct_def.fields.vec.end(); ++it) {
|
|
auto &field = **it;
|
|
const auto &field_type = field.value.type;
|
|
const auto array_field = IsArray(field_type);
|
|
const auto &type = array_field ? field_type.VectorType()
|
|
: DestinationType(field_type, false);
|
|
const auto array_cnt = array_field ? (array_count + 1) : array_count;
|
|
if (IsStruct(type)) {
|
|
// Generate arguments for a struct inside a struct. To ensure names
|
|
// don't clash, and to make it obvious these arguments are constructing
|
|
// a nested struct, prefix the name with the field name.
|
|
GenStructArgs(*field_type.struct_def, code_ptr,
|
|
(nameprefix + (field.name + "_")).c_str(), array_cnt);
|
|
} else {
|
|
code += ", ";
|
|
code += GenTypeBasic(type);
|
|
if (lang_.language == IDLOptions::kJava) {
|
|
for (size_t i = 0; i < array_cnt; i++) code += "[]";
|
|
} else if (lang_.language == IDLOptions::kCSharp) {
|
|
if (array_cnt > 0) {
|
|
code += "[";
|
|
for (size_t i = 1; i < array_cnt; i++) code += ",";
|
|
code += "]";
|
|
}
|
|
} else {
|
|
FLATBUFFERS_ASSERT(0);
|
|
}
|
|
code += " ";
|
|
code += nameprefix;
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Recusively generate struct construction statements of the form:
|
|
// builder.putType(name);
|
|
// and insert manual padding.
|
|
void GenStructBody(const StructDef &struct_def, std::string *code_ptr,
|
|
const char *nameprefix, size_t index = 0,
|
|
bool in_array = false) const {
|
|
std::string &code = *code_ptr;
|
|
std::string indent((index + 1) * 2, ' ');
|
|
code += indent + " builder." + FunctionStart('P') + "rep(";
|
|
code += NumToString(struct_def.minalign) + ", ";
|
|
code += NumToString(struct_def.bytesize) + ");\n";
|
|
for (auto it = struct_def.fields.vec.rbegin();
|
|
it != struct_def.fields.vec.rend(); ++it) {
|
|
auto &field = **it;
|
|
const auto &field_type = field.value.type;
|
|
if (field.padding) {
|
|
code += indent + " builder." + FunctionStart('P') + "ad(";
|
|
code += NumToString(field.padding) + ");\n";
|
|
}
|
|
if (IsStruct(field_type)) {
|
|
GenStructBody(*field_type.struct_def, code_ptr,
|
|
(nameprefix + (field.name + "_")).c_str(), index,
|
|
in_array);
|
|
} else {
|
|
const auto &type =
|
|
IsArray(field_type) ? field_type.VectorType() : field_type;
|
|
const auto index_var = "_idx" + NumToString(index);
|
|
if (IsArray(field_type)) {
|
|
code += indent + " for (int " + index_var + " = ";
|
|
code += NumToString(field_type.fixed_length);
|
|
code += "; " + index_var + " > 0; " + index_var + "--) {\n";
|
|
in_array = true;
|
|
}
|
|
if (IsStruct(type)) {
|
|
GenStructBody(*field_type.struct_def, code_ptr,
|
|
(nameprefix + (field.name + "_")).c_str(), index + 1,
|
|
in_array);
|
|
} else {
|
|
code += IsArray(field_type) ? " " : "";
|
|
code += indent + " builder." + FunctionStart('P') + "ut";
|
|
code += GenMethod(type) + "(";
|
|
code += SourceCast(type);
|
|
auto argname =
|
|
nameprefix + MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += argname;
|
|
size_t array_cnt = index + (IsArray(field_type) ? 1 : 0);
|
|
if (lang_.language == IDLOptions::kJava) {
|
|
for (size_t i = 0; in_array && i < array_cnt; i++) {
|
|
code += "[_idx" + NumToString(i) + "-1]";
|
|
}
|
|
} else if (lang_.language == IDLOptions::kCSharp) {
|
|
if (array_cnt > 0) {
|
|
code += "[";
|
|
for (size_t i = 0; in_array && i < array_cnt; i++) {
|
|
code += "_idx" + NumToString(i) + "-1";
|
|
if (i != (array_cnt - 1)) code += ",";
|
|
}
|
|
code += "]";
|
|
}
|
|
} else {
|
|
FLATBUFFERS_ASSERT(0);
|
|
}
|
|
code += ");\n";
|
|
}
|
|
if (IsArray(field_type)) { code += indent + " }\n"; }
|
|
}
|
|
}
|
|
}
|
|
|
|
std::string GenByteBufferLength(const char *bb_name) const {
|
|
std::string bb_len = bb_name;
|
|
if (lang_.language == IDLOptions::kCSharp)
|
|
bb_len += ".Length";
|
|
else
|
|
bb_len += ".capacity()";
|
|
return bb_len;
|
|
}
|
|
|
|
std::string GenOffsetGetter(flatbuffers::FieldDef *key_field,
|
|
const char *num = nullptr) const {
|
|
std::string key_offset = "";
|
|
key_offset += lang_.accessor_prefix_static + "__offset(" +
|
|
NumToString(key_field->value.offset) + ", ";
|
|
if (num) {
|
|
key_offset += num;
|
|
key_offset +=
|
|
(lang_.language == IDLOptions::kCSharp ? ".Value, builder.DataBuffer)"
|
|
: ", _bb)");
|
|
} else {
|
|
key_offset += GenByteBufferLength("bb");
|
|
key_offset += " - tableOffset, bb)";
|
|
}
|
|
return key_offset;
|
|
}
|
|
|
|
std::string GenLookupKeyGetter(flatbuffers::FieldDef *key_field) const {
|
|
std::string key_getter = " ";
|
|
key_getter += "int tableOffset = " + lang_.accessor_prefix_static;
|
|
key_getter += "__indirect(vectorLocation + 4 * (start + middle)";
|
|
key_getter += ", bb);\n ";
|
|
if (key_field->value.type.base_type == BASE_TYPE_STRING) {
|
|
key_getter += "int comp = " + lang_.accessor_prefix_static;
|
|
key_getter += FunctionStart('C') + "ompareStrings(";
|
|
key_getter += GenOffsetGetter(key_field);
|
|
key_getter += ", byteKey, bb);\n";
|
|
} else {
|
|
auto get_val = GenGetterForLookupByKey(key_field, "bb");
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
key_getter += "int comp = " + get_val + ".CompareTo(key);\n";
|
|
} else {
|
|
key_getter += GenTypeNameDest(key_field->value.type) + " val = ";
|
|
key_getter += get_val + ";\n";
|
|
key_getter += " int comp = val > key ? 1 : val < key ? -1 : 0;\n";
|
|
}
|
|
}
|
|
return key_getter;
|
|
}
|
|
|
|
std::string GenKeyGetter(flatbuffers::FieldDef *key_field) const {
|
|
std::string key_getter = "";
|
|
auto data_buffer =
|
|
(lang_.language == IDLOptions::kCSharp) ? "builder.DataBuffer" : "_bb";
|
|
if (key_field->value.type.base_type == BASE_TYPE_STRING) {
|
|
if (lang_.language == IDLOptions::kJava) key_getter += " return ";
|
|
key_getter += lang_.accessor_prefix_static;
|
|
key_getter += FunctionStart('C') + "ompareStrings(";
|
|
key_getter += GenOffsetGetter(key_field, "o1") + ", ";
|
|
key_getter += GenOffsetGetter(key_field, "o2") + ", " + data_buffer + ")";
|
|
if (lang_.language == IDLOptions::kJava) key_getter += ";";
|
|
} else {
|
|
auto field_getter = GenGetterForLookupByKey(key_field, data_buffer, "o1");
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
key_getter += field_getter;
|
|
field_getter = GenGetterForLookupByKey(key_field, data_buffer, "o2");
|
|
key_getter += ".CompareTo(" + field_getter + ")";
|
|
} else {
|
|
key_getter +=
|
|
"\n " + GenTypeNameDest(key_field->value.type) + " val_1 = ";
|
|
key_getter +=
|
|
field_getter + ";\n " + GenTypeNameDest(key_field->value.type);
|
|
key_getter += " val_2 = ";
|
|
field_getter = GenGetterForLookupByKey(key_field, data_buffer, "o2");
|
|
key_getter += field_getter + ";\n";
|
|
key_getter +=
|
|
" return val_1 > val_2 ? 1 : val_1 < val_2 ? -1 : 0;\n ";
|
|
}
|
|
}
|
|
return key_getter;
|
|
}
|
|
|
|
void GenStruct(StructDef &struct_def, std::string *code_ptr) const {
|
|
if (struct_def.generated) return;
|
|
std::string &code = *code_ptr;
|
|
|
|
// Generate a struct accessor class, with methods of the form:
|
|
// public type name() { return bb.getType(i + offset); }
|
|
// or for tables of the form:
|
|
// public type name() {
|
|
// int o = __offset(offset); return o != 0 ? bb.getType(o + i) : default;
|
|
// }
|
|
GenComment(struct_def.doc_comment, code_ptr, &lang_.comment_config);
|
|
if (struct_def.attributes.Lookup("private")) {
|
|
// For Java, we leave the struct unmarked to indicate package-private
|
|
// For C# we mark the struct as internal
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += "internal ";
|
|
}
|
|
} else {
|
|
code += "public ";
|
|
}
|
|
if (lang_.language == IDLOptions::kCSharp &&
|
|
struct_def.attributes.Lookup("csharp_partial")) {
|
|
// generate a partial class for this C# struct/table
|
|
code += "partial ";
|
|
} else {
|
|
code += lang_.unsubclassable_decl;
|
|
}
|
|
code += lang_.accessor_type + struct_def.name;
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += " : IFlatbufferObject";
|
|
code += lang_.open_curly;
|
|
code += " private ";
|
|
code += struct_def.fixed ? "Struct" : "Table";
|
|
code += " __p;\n";
|
|
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += " public ByteBuffer ByteBuffer { get { return __p.bb; } }\n";
|
|
}
|
|
|
|
} else {
|
|
code += lang_.inheritance_marker;
|
|
code += struct_def.fixed ? "Struct" : "Table";
|
|
code += lang_.open_curly;
|
|
}
|
|
|
|
if (!struct_def.fixed) {
|
|
// Generate verson check method.
|
|
// Force compile time error if not using the same version runtime.
|
|
code += " public static void ValidateVersion() {";
|
|
if (lang_.language == IDLOptions::kCSharp)
|
|
code += " FlatBufferConstants.";
|
|
else
|
|
code += " Constants.";
|
|
code += "FLATBUFFERS_1_11_1(); ";
|
|
code += "}\n";
|
|
|
|
// Generate a special accessor for the table that when used as the root
|
|
// of a FlatBuffer
|
|
std::string method_name =
|
|
FunctionStart('G') + "etRootAs" + struct_def.name;
|
|
std::string method_signature =
|
|
" public static " + struct_def.name + " " + method_name;
|
|
|
|
// create convenience method that doesn't require an existing object
|
|
code += method_signature + "(ByteBuffer _bb) ";
|
|
code += "{ return " + method_name + "(_bb, new " + struct_def.name +
|
|
"()); }\n";
|
|
|
|
// create method that allows object reuse
|
|
code +=
|
|
method_signature + "(ByteBuffer _bb, " + struct_def.name + " obj) { ";
|
|
code += lang_.set_bb_byteorder;
|
|
code += "return (obj.__assign(_bb." + FunctionStart('G') + "etInt(_bb.";
|
|
code += lang_.get_bb_position;
|
|
code += ") + _bb.";
|
|
code += lang_.get_bb_position;
|
|
code += ", _bb)); }\n";
|
|
if (parser_.root_struct_def_ == &struct_def) {
|
|
if (parser_.file_identifier_.length()) {
|
|
// Check if a buffer has the identifier.
|
|
code += " public static ";
|
|
code += lang_.bool_type + struct_def.name;
|
|
code += "BufferHasIdentifier(ByteBuffer _bb) { return ";
|
|
code += lang_.accessor_prefix_static + "__has_identifier(_bb, \"";
|
|
code += parser_.file_identifier_;
|
|
code += "\"); }\n";
|
|
}
|
|
}
|
|
}
|
|
// Generate the __init method that sets the field in a pre-existing
|
|
// accessor object. This is to allow object reuse.
|
|
code += " public void __init(int _i, ByteBuffer _bb) ";
|
|
code += "{ ";
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += "__p = new ";
|
|
code += struct_def.fixed ? "Struct" : "Table";
|
|
code += "(_i, _bb); ";
|
|
} else {
|
|
code += "__reset(_i, _bb); ";
|
|
}
|
|
code += "}\n";
|
|
code +=
|
|
" public " + struct_def.name + " __assign(int _i, ByteBuffer _bb) ";
|
|
code += "{ __init(_i, _bb); return this; }\n\n";
|
|
for (auto it = struct_def.fields.vec.begin();
|
|
it != struct_def.fields.vec.end(); ++it) {
|
|
auto &field = **it;
|
|
if (field.deprecated) continue;
|
|
GenComment(field.doc_comment, code_ptr, &lang_.comment_config, " ");
|
|
std::string type_name = GenTypeGet(field.value.type);
|
|
std::string type_name_dest = GenTypeNameDest(field.value.type);
|
|
std::string conditional_cast = "";
|
|
std::string optional = "";
|
|
if (lang_.language == IDLOptions::kCSharp && !struct_def.fixed &&
|
|
(field.value.type.base_type == BASE_TYPE_STRUCT ||
|
|
field.value.type.base_type == BASE_TYPE_UNION ||
|
|
(field.value.type.base_type == BASE_TYPE_VECTOR &&
|
|
(field.value.type.element == BASE_TYPE_STRUCT ||
|
|
field.value.type.element == BASE_TYPE_UNION)))) {
|
|
optional = lang_.optional_suffix;
|
|
conditional_cast = "(" + type_name_dest + optional + ")";
|
|
}
|
|
std::string dest_mask = DestinationMask(field.value.type, true);
|
|
std::string dest_cast = DestinationCast(field.value.type);
|
|
std::string src_cast = SourceCast(field.value.type);
|
|
std::string method_start = " public " +
|
|
(field.required ? "" : GenNullableAnnotation(field.value.type)) +
|
|
type_name_dest + optional + " " +
|
|
MakeCamel(field.name, lang_.first_camel_upper);
|
|
std::string obj = lang_.language == IDLOptions::kCSharp
|
|
? "(new " + type_name + "())"
|
|
: "obj";
|
|
|
|
// Most field accessors need to retrieve and test the field offset first,
|
|
// this is the prefix code for that:
|
|
auto offset_prefix =
|
|
IsArray(field.value.type)
|
|
? " { return "
|
|
: (" { int o = " + lang_.accessor_prefix + "__offset(" +
|
|
NumToString(field.value.offset) + "); return o != 0 ? ");
|
|
// Generate the accessors that don't do object reuse.
|
|
if (field.value.type.base_type == BASE_TYPE_STRUCT) {
|
|
// Calls the accessor that takes an accessor object with a new object.
|
|
if (lang_.language != IDLOptions::kCSharp) {
|
|
code += method_start + "() { return ";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "(new ";
|
|
code += type_name + "()); }\n";
|
|
}
|
|
} else if (field.value.type.base_type == BASE_TYPE_VECTOR &&
|
|
field.value.type.element == BASE_TYPE_STRUCT) {
|
|
// Accessors for vectors of structs also take accessor objects, this
|
|
// generates a variant without that argument.
|
|
if (lang_.language != IDLOptions::kCSharp) {
|
|
code += method_start + "(int j) { return ";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "(new " + type_name + "(), j); }\n";
|
|
}
|
|
} else if (field.value.type.base_type == BASE_TYPE_UNION ||
|
|
(field.value.type.base_type == BASE_TYPE_VECTOR &&
|
|
field.value.type.VectorType().base_type == BASE_TYPE_UNION)) {
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
// Union types in C# use generic Table-derived type for better type
|
|
// safety.
|
|
method_start += "<TTable>";
|
|
type_name = type_name_dest;
|
|
}
|
|
}
|
|
std::string getter = dest_cast + GenGetter(field.value.type);
|
|
code += method_start;
|
|
std::string default_cast = "";
|
|
// only create default casts for c# scalars or vectors of scalars
|
|
if (lang_.language == IDLOptions::kCSharp &&
|
|
(IsScalar(field.value.type.base_type) ||
|
|
(field.value.type.base_type == BASE_TYPE_VECTOR &&
|
|
IsScalar(field.value.type.element)))) {
|
|
// For scalars, default value will be returned by GetDefaultValue().
|
|
// If the scalar is an enum, GetDefaultValue() returns an actual c# enum
|
|
// that doesn't need to be casted. However, default values for enum
|
|
// elements of vectors are integer literals ("0") and are still casted
|
|
// for clarity.
|
|
if (field.value.type.enum_def == nullptr ||
|
|
field.value.type.base_type == BASE_TYPE_VECTOR) {
|
|
default_cast = "(" + type_name_dest + ")";
|
|
}
|
|
}
|
|
std::string member_suffix = "; ";
|
|
if (IsScalar(field.value.type.base_type)) {
|
|
code += lang_.getter_prefix;
|
|
member_suffix += lang_.getter_suffix;
|
|
if (struct_def.fixed) {
|
|
code += " { return " + getter;
|
|
code += "(" + lang_.accessor_prefix + "bb_pos + ";
|
|
code += NumToString(field.value.offset) + ")";
|
|
code += dest_mask;
|
|
} else {
|
|
code += offset_prefix + getter;
|
|
code += "(o + " + lang_.accessor_prefix + "bb_pos)" + dest_mask;
|
|
code += " : " + default_cast;
|
|
code += GenDefaultValue(field);
|
|
}
|
|
} else {
|
|
switch (field.value.type.base_type) {
|
|
case BASE_TYPE_STRUCT:
|
|
if (lang_.language != IDLOptions::kCSharp) {
|
|
code += "(" + type_name + " obj" + ")";
|
|
} else {
|
|
code += lang_.getter_prefix;
|
|
member_suffix += lang_.getter_suffix;
|
|
}
|
|
if (struct_def.fixed) {
|
|
code += " { return " + obj + ".__assign(" + lang_.accessor_prefix;
|
|
code += "bb_pos + " + NumToString(field.value.offset) + ", ";
|
|
code += lang_.accessor_prefix + "bb)";
|
|
} else {
|
|
code += offset_prefix + conditional_cast;
|
|
code += obj + ".__assign(";
|
|
code += field.value.type.struct_def->fixed
|
|
? "o + " + lang_.accessor_prefix + "bb_pos"
|
|
: lang_.accessor_prefix + "__indirect(o + " +
|
|
lang_.accessor_prefix + "bb_pos)";
|
|
code += ", " + lang_.accessor_prefix + "bb) : null";
|
|
}
|
|
break;
|
|
case BASE_TYPE_STRING:
|
|
code += lang_.getter_prefix;
|
|
member_suffix += lang_.getter_suffix;
|
|
code += offset_prefix + getter + "(o + " + lang_.accessor_prefix;
|
|
code += "bb_pos) : null";
|
|
break;
|
|
case BASE_TYPE_ARRAY: FLATBUFFERS_FALLTHROUGH(); // fall thru
|
|
case BASE_TYPE_VECTOR: {
|
|
auto vectortype = field.value.type.VectorType();
|
|
if (vectortype.base_type == BASE_TYPE_UNION &&
|
|
lang_.language == IDLOptions::kCSharp) {
|
|
conditional_cast = "(TTable?)";
|
|
getter += "<TTable>";
|
|
}
|
|
code += "(";
|
|
if (vectortype.base_type == BASE_TYPE_STRUCT) {
|
|
if (lang_.language != IDLOptions::kCSharp)
|
|
code += type_name + " obj, ";
|
|
getter = obj + ".__assign";
|
|
} else if (vectortype.base_type == BASE_TYPE_UNION) {
|
|
if (lang_.language != IDLOptions::kCSharp)
|
|
code += type_name + " obj, ";
|
|
}
|
|
code += "int j)";
|
|
const auto body = offset_prefix + conditional_cast + getter + "(";
|
|
if (vectortype.base_type == BASE_TYPE_UNION) {
|
|
if (lang_.language != IDLOptions::kCSharp)
|
|
code += body + "obj, ";
|
|
else
|
|
code += " where TTable : struct, IFlatbufferObject" + body;
|
|
} else {
|
|
code += body;
|
|
}
|
|
auto index = lang_.accessor_prefix;
|
|
if (IsArray(field.value.type)) {
|
|
index += "bb_pos + " + NumToString(field.value.offset) + " + ";
|
|
} else {
|
|
index += "__vector(o) + ";
|
|
}
|
|
index += "j * " + NumToString(InlineSize(vectortype));
|
|
if (vectortype.base_type == BASE_TYPE_STRUCT) {
|
|
code += vectortype.struct_def->fixed
|
|
? index
|
|
: lang_.accessor_prefix + "__indirect(" + index + ")";
|
|
code += ", " + lang_.accessor_prefix + "bb";
|
|
} else if (vectortype.base_type == BASE_TYPE_UNION) {
|
|
code += index + " - " + lang_.accessor_prefix + "bb_pos";
|
|
} else {
|
|
code += index;
|
|
}
|
|
code += ")" + dest_mask;
|
|
if (!IsArray(field.value.type)) {
|
|
code += " : ";
|
|
code +=
|
|
field.value.type.element == BASE_TYPE_BOOL
|
|
? "false"
|
|
: (IsScalar(field.value.type.element) ? default_cast + "0"
|
|
: "null");
|
|
}
|
|
|
|
break;
|
|
}
|
|
case BASE_TYPE_UNION:
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += "() where TTable : struct, IFlatbufferObject";
|
|
code += offset_prefix + "(TTable?)" + getter;
|
|
code += "<TTable>(o) : null";
|
|
} else {
|
|
code += "(" + type_name + " obj)" + offset_prefix + getter;
|
|
code += "(obj, o) : null";
|
|
}
|
|
break;
|
|
default: FLATBUFFERS_ASSERT(0);
|
|
}
|
|
}
|
|
code += member_suffix;
|
|
code += "}\n";
|
|
if (field.value.type.base_type == BASE_TYPE_VECTOR) {
|
|
code +=
|
|
" public int " + MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "Length";
|
|
code += lang_.getter_prefix;
|
|
code += offset_prefix;
|
|
code += lang_.accessor_prefix + "__vector_len(o) : 0; ";
|
|
code += lang_.getter_suffix;
|
|
code += "}\n";
|
|
// See if we should generate a by-key accessor.
|
|
if (field.value.type.element == BASE_TYPE_STRUCT &&
|
|
!field.value.type.struct_def->fixed) {
|
|
auto &sd = *field.value.type.struct_def;
|
|
auto &fields = sd.fields.vec;
|
|
for (auto kit = fields.begin(); kit != fields.end(); ++kit) {
|
|
auto &key_field = **kit;
|
|
if (key_field.key) {
|
|
auto qualified_name = WrapInNameSpace(sd);
|
|
code += " public " + qualified_name + lang_.optional_suffix + " ";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper) + "ByKey(";
|
|
code += GenTypeNameDest(key_field.value.type) + " key)";
|
|
code += offset_prefix;
|
|
code += qualified_name + ".__lookup_by_key(";
|
|
if (lang_.language == IDLOptions::kJava)
|
|
code += "null, ";
|
|
code += lang_.accessor_prefix + "__vector(o), key, ";
|
|
code += lang_.accessor_prefix + "bb) : null; ";
|
|
code += "}\n";
|
|
if (lang_.language == IDLOptions::kJava) {
|
|
code += " public " + qualified_name + lang_.optional_suffix + " ";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper) + "ByKey(";
|
|
code += qualified_name + lang_.optional_suffix + " obj, ";
|
|
code += GenTypeNameDest(key_field.value.type) + " key)";
|
|
code += offset_prefix;
|
|
code += qualified_name + ".__lookup_by_key(obj, ";
|
|
code += lang_.accessor_prefix + "__vector(o), key, ";
|
|
code += lang_.accessor_prefix + "bb) : null; ";
|
|
code += "}\n";
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Generate a ByteBuffer accessor for strings & vectors of scalars.
|
|
if ((field.value.type.base_type == BASE_TYPE_VECTOR &&
|
|
IsScalar(field.value.type.VectorType().base_type)) ||
|
|
field.value.type.base_type == BASE_TYPE_STRING) {
|
|
switch (lang_.language) {
|
|
case IDLOptions::kJava:
|
|
code += " public ByteBuffer ";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "AsByteBuffer() { return ";
|
|
code += lang_.accessor_prefix + "__vector_as_bytebuffer(";
|
|
code += NumToString(field.value.offset) + ", ";
|
|
code +=
|
|
NumToString(field.value.type.base_type == BASE_TYPE_STRING
|
|
? 1
|
|
: InlineSize(field.value.type.VectorType()));
|
|
code += "); }\n";
|
|
code += " public ByteBuffer ";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "InByteBuffer(ByteBuffer _bb) { return ";
|
|
code += lang_.accessor_prefix + "__vector_in_bytebuffer(_bb, ";
|
|
code += NumToString(field.value.offset) + ", ";
|
|
code +=
|
|
NumToString(field.value.type.base_type == BASE_TYPE_STRING
|
|
? 1
|
|
: InlineSize(field.value.type.VectorType()));
|
|
code += "); }\n";
|
|
break;
|
|
case IDLOptions::kCSharp:
|
|
code += "#if ENABLE_SPAN_T\n";
|
|
code += " public Span<byte> Get";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "Bytes() { return ";
|
|
code += lang_.accessor_prefix + "__vector_as_span(";
|
|
code += NumToString(field.value.offset);
|
|
code += "); }\n";
|
|
code += "#else\n";
|
|
code += " public ArraySegment<byte>? Get";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "Bytes() { return ";
|
|
code += lang_.accessor_prefix + "__vector_as_arraysegment(";
|
|
code += NumToString(field.value.offset);
|
|
code += "); }\n";
|
|
code += "#endif\n";
|
|
|
|
// For direct blockcopying the data into a typed array
|
|
code += " public ";
|
|
code += GenTypeBasic(field.value.type.VectorType());
|
|
code += "[] Get";
|
|
code += MakeCamel(field.name, lang_.first_camel_upper);
|
|
code += "Array() { return ";
|
|
code += lang_.accessor_prefix + "__vector_as_array<";
|
|
code += GenTypeBasic(field.value.type.VectorType());
|
|
code += ">(";
|
|
code += NumToString(field.value.offset);
|
|
code += "); }\n";
|
|
break;
|
|
default: break;
|
|
}
|
|
}
|
|
// generate object accessors if is nested_flatbuffer
|
|
if (field.nested_flatbuffer) {
|
|
auto nested_type_name = WrapInNameSpace(*field.nested_flatbuffer);
|
|
auto nested_method_name =
|
|
MakeCamel(field.name, lang_.first_camel_upper) + "As" +
|
|
field.nested_flatbuffer->name;
|
|
auto get_nested_method_name = nested_method_name;
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
get_nested_method_name = "Get" + nested_method_name;
|
|
conditional_cast =
|
|
"(" + nested_type_name + lang_.optional_suffix + ")";
|
|
}
|
|
if (lang_.language != IDLOptions::kCSharp) {
|
|
code += " public " + nested_type_name + lang_.optional_suffix + " ";
|
|
code += nested_method_name + "() { return ";
|
|
code +=
|
|
get_nested_method_name + "(new " + nested_type_name + "()); }\n";
|
|
} else {
|
|
obj = "(new " + nested_type_name + "())";
|
|
}
|
|
code += " public " + nested_type_name + lang_.optional_suffix + " ";
|
|
code += get_nested_method_name + "(";
|
|
if (lang_.language != IDLOptions::kCSharp)
|
|
code += nested_type_name + " obj";
|
|
code += ") { int o = " + lang_.accessor_prefix + "__offset(";
|
|
code += NumToString(field.value.offset) + "); ";
|
|
code += "return o != 0 ? " + conditional_cast + obj + ".__assign(";
|
|
code += lang_.accessor_prefix;
|
|
code += "__indirect(" + lang_.accessor_prefix + "__vector(o)), ";
|
|
code += lang_.accessor_prefix + "bb) : null; }\n";
|
|
}
|
|
// Generate mutators for scalar fields or vectors of scalars.
|
|
if (parser_.opts.mutable_buffer) {
|
|
auto is_series = (IsSeries(field.value.type));
|
|
const auto &underlying_type =
|
|
is_series ? field.value.type.VectorType() : field.value.type;
|
|
// Boolean parameters have to be explicitly converted to byte
|
|
// representation.
|
|
auto setter_parameter = underlying_type.base_type == BASE_TYPE_BOOL
|
|
? "(byte)(" + field.name + " ? 1 : 0)"
|
|
: field.name;
|
|
auto mutator_prefix = MakeCamel("mutate", lang_.first_camel_upper);
|
|
// A vector mutator also needs the index of the vector element it should
|
|
// mutate.
|
|
auto mutator_params = (is_series ? "(int j, " : "(") +
|
|
GenTypeNameDest(underlying_type) + " " +
|
|
field.name + ") { ";
|
|
auto setter_index =
|
|
is_series
|
|
? lang_.accessor_prefix +
|
|
(IsArray(field.value.type)
|
|
? "bb_pos + " + NumToString(field.value.offset)
|
|
: "__vector(o)") +
|
|
+" + j * " + NumToString(InlineSize(underlying_type))
|
|
: (struct_def.fixed
|
|
? lang_.accessor_prefix + "bb_pos + " +
|
|
NumToString(field.value.offset)
|
|
: "o + " + lang_.accessor_prefix + "bb_pos");
|
|
if (IsScalar(underlying_type.base_type)) {
|
|
code += " public ";
|
|
code += struct_def.fixed ? "void " : lang_.bool_type;
|
|
code += mutator_prefix + MakeCamel(field.name, true);
|
|
code += mutator_params;
|
|
if (struct_def.fixed) {
|
|
code += GenSetter(underlying_type) + "(" + setter_index + ", ";
|
|
code += src_cast + setter_parameter + "); }\n";
|
|
} else {
|
|
code += "int o = " + lang_.accessor_prefix + "__offset(";
|
|
code += NumToString(field.value.offset) + ");";
|
|
code += " if (o != 0) { " + GenSetter(underlying_type);
|
|
code += "(" + setter_index + ", " + src_cast + setter_parameter +
|
|
"); return true; } else { return false; } }\n";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
code += "\n";
|
|
flatbuffers::FieldDef *key_field = nullptr;
|
|
if (struct_def.fixed) {
|
|
// create a struct constructor function
|
|
code += " public static " + GenOffsetType(struct_def) + " ";
|
|
code += FunctionStart('C') + "reate";
|
|
code += struct_def.name + "(FlatBufferBuilder builder";
|
|
GenStructArgs(struct_def, code_ptr, "");
|
|
code += ") {\n";
|
|
GenStructBody(struct_def, code_ptr, "");
|
|
code += " return ";
|
|
code += GenOffsetConstruct(
|
|
struct_def, "builder." + std::string(lang_.get_fbb_offset));
|
|
code += ";\n }\n";
|
|
} else {
|
|
// Generate a method that creates a table in one go. This is only possible
|
|
// when the table has no struct fields, since those have to be created
|
|
// inline, and there's no way to do so in Java.
|
|
bool has_no_struct_fields = true;
|
|
int num_fields = 0;
|
|
for (auto it = struct_def.fields.vec.begin();
|
|
it != struct_def.fields.vec.end(); ++it) {
|
|
auto &field = **it;
|
|
if (field.deprecated) continue;
|
|
if (IsStruct(field.value.type)) {
|
|
has_no_struct_fields = false;
|
|
} else {
|
|
num_fields++;
|
|
}
|
|
}
|
|
// JVM specifications restrict default constructor params to be < 255.
|
|
// Longs and doubles take up 2 units, so we set the limit to be < 127.
|
|
if (has_no_struct_fields && num_fields && num_fields < 127) {
|
|
// Generate a table constructor of the form:
|
|
// public static int createName(FlatBufferBuilder builder, args...)
|
|
code += " public static " + GenOffsetType(struct_def) + " ";
|
|
code += FunctionStart('C') + "reate" + struct_def.name;
|
|
code += "(FlatBufferBuilder builder";
|
|
for (auto it = struct_def.fields.vec.begin();
|
|
it != struct_def.fields.vec.end(); ++it) {
|
|
auto &field = **it;
|
|
if (field.deprecated) continue;
|
|
code += ",\n ";
|
|
code += GenTypeBasic(DestinationType(field.value.type, false));
|
|
code += " ";
|
|
code += field.name;
|
|
if (!IsScalar(field.value.type.base_type)) code += "Offset";
|
|
|
|
// Java doesn't have defaults, which means this method must always
|
|
// supply all arguments, and thus won't compile when fields are added.
|
|
if (lang_.language != IDLOptions::kJava) {
|
|
code += " = ";
|
|
code += GenDefaultValueBasic(field);
|
|
}
|
|
}
|
|
code += ") {\n builder.";
|
|
code += FunctionStart('S') + "tartTable(";
|
|
code += NumToString(struct_def.fields.vec.size()) + ");\n";
|
|
for (size_t size = struct_def.sortbysize ? sizeof(largest_scalar_t) : 1;
|
|
size; size /= 2) {
|
|
for (auto it = struct_def.fields.vec.rbegin();
|
|
it != struct_def.fields.vec.rend(); ++it) {
|
|
auto &field = **it;
|
|
if (!field.deprecated &&
|
|
(!struct_def.sortbysize ||
|
|
size == SizeOf(field.value.type.base_type))) {
|
|
code += " " + struct_def.name + ".";
|
|
code += FunctionStart('A') + "dd";
|
|
code += MakeCamel(field.name) + "(builder, " + field.name;
|
|
if (!IsScalar(field.value.type.base_type)) code += "Offset";
|
|
code += ");\n";
|
|
}
|
|
}
|
|
}
|
|
code += " return " + struct_def.name + ".";
|
|
code += FunctionStart('E') + "nd" + struct_def.name;
|
|
code += "(builder);\n }\n\n";
|
|
}
|
|
// Generate a set of static methods that allow table construction,
|
|
// of the form:
|
|
// public static void addName(FlatBufferBuilder builder, short name)
|
|
// { builder.addShort(id, name, default); }
|
|
// Unlike the Create function, these always work.
|
|
code += " public static void " + FunctionStart('S') + "tart";
|
|
code += struct_def.name;
|
|
code += "(FlatBufferBuilder builder) { builder.";
|
|
code += FunctionStart('S') + "tartTable(";
|
|
code += NumToString(struct_def.fields.vec.size()) + "); }\n";
|
|
for (auto it = struct_def.fields.vec.begin();
|
|
it != struct_def.fields.vec.end(); ++it) {
|
|
auto &field = **it;
|
|
if (field.deprecated) continue;
|
|
if (field.key) key_field = &field;
|
|
code += " public static void " + FunctionStart('A') + "dd";
|
|
code += MakeCamel(field.name);
|
|
code += "(FlatBufferBuilder builder, ";
|
|
code += GenTypeBasic(DestinationType(field.value.type, false));
|
|
auto argname = MakeCamel(field.name, false);
|
|
if (!IsScalar(field.value.type.base_type)) argname += "Offset";
|
|
code += " " + argname + ") { builder." + FunctionStart('A') + "dd";
|
|
code += GenMethod(field.value.type) + "(";
|
|
code += NumToString(it - struct_def.fields.vec.begin()) + ", ";
|
|
code += SourceCastBasic(field.value.type);
|
|
code += argname;
|
|
if (!IsScalar(field.value.type.base_type) &&
|
|
field.value.type.base_type != BASE_TYPE_UNION &&
|
|
lang_.language == IDLOptions::kCSharp) {
|
|
code += ".Value";
|
|
}
|
|
code += ", ";
|
|
if (lang_.language == IDLOptions::kJava)
|
|
code += SourceCastBasic(field.value.type);
|
|
code += GenDefaultValue(field, false);
|
|
code += "); }\n";
|
|
if (field.value.type.base_type == BASE_TYPE_VECTOR) {
|
|
auto vector_type = field.value.type.VectorType();
|
|
auto alignment = InlineAlignment(vector_type);
|
|
auto elem_size = InlineSize(vector_type);
|
|
if (!IsStruct(vector_type)) {
|
|
// Generate a method to create a vector from a Java array.
|
|
code += " public static " + GenVectorOffsetType() + " ";
|
|
code += FunctionStart('C') + "reate";
|
|
code += MakeCamel(field.name);
|
|
code += "Vector(FlatBufferBuilder builder, ";
|
|
code += GenTypeBasic(vector_type) + "[] data) ";
|
|
code += "{ builder." + FunctionStart('S') + "tartVector(";
|
|
code += NumToString(elem_size);
|
|
code += ", data." + FunctionStart('L') + "ength, ";
|
|
code += NumToString(alignment);
|
|
code += "); for (int i = data.";
|
|
code += FunctionStart('L') + "ength - 1; i >= 0; i--) builder.";
|
|
code += FunctionStart('A') + "dd";
|
|
code += GenMethod(vector_type);
|
|
code += "(";
|
|
code += SourceCastBasic(vector_type, false);
|
|
code += "data[i]";
|
|
if (lang_.language == IDLOptions::kCSharp &&
|
|
(vector_type.base_type == BASE_TYPE_STRUCT ||
|
|
vector_type.base_type == BASE_TYPE_STRING))
|
|
code += ".Value";
|
|
code += "); return ";
|
|
code += "builder." + FunctionStart('E') + "ndVector(); }\n";
|
|
// For C#, include a block copy method signature.
|
|
if (lang_.language == IDLOptions::kCSharp) {
|
|
code += " public static " + GenVectorOffsetType() + " ";
|
|
code += FunctionStart('C') + "reate";
|
|
code += MakeCamel(field.name);
|
|
code += "VectorBlock(FlatBufferBuilder builder, ";
|
|
code += GenTypeBasic(vector_type) + "[] data) ";
|
|
code += "{ builder." + FunctionStart('S') + "tartVector(";
|
|
code += NumToString(elem_size);
|
|
code += ", data." + FunctionStart('L') + "ength, ";
|
|
code += NumToString(alignment);
|
|
code += "); builder.Add(data); return builder.EndVector(); }\n";
|
|
}
|
|
}
|
|
// Generate a method to start a vector, data to be added manually
|
|
// after.
|
|
code += " public static void " + FunctionStart('S') + "tart";
|
|
code += MakeCamel(field.name);
|
|
code += "Vector(FlatBufferBuilder builder, int numElems) ";
|
|
code += "{ builder." + FunctionStart('S') + "tartVector(";
|
|
code += NumToString(elem_size);
|
|
code += ", numElems, " + NumToString(alignment);
|
|
code += "); }\n";
|
|
}
|
|
}
|
|
code += " public static " + GenOffsetType(struct_def) + " ";
|
|
code += FunctionStart('E') + "nd" + struct_def.name;
|
|
code += "(FlatBufferBuilder builder) {\n int o = builder.";
|
|
code += FunctionStart('E') + "ndTable();\n";
|
|
for (auto it = struct_def.fields.vec.begin();
|
|
it != struct_def.fields.vec.end(); ++it) {
|
|
auto &field = **it;
|
|
if (!field.deprecated && field.required) {
|
|
code += " builder." + FunctionStart('R') + "equired(o, ";
|
|
code += NumToString(field.value.offset);
|
|
code += "); // " + field.name + "\n";
|
|
}
|
|
}
|
|
code += " return " + GenOffsetConstruct(struct_def, "o") + ";\n }\n";
|
|
if (parser_.root_struct_def_ == &struct_def) {
|
|
std::string size_prefix[] = { "", "SizePrefixed" };
|
|
for (int i = 0; i < 2; ++i) {
|
|
code += " public static void ";
|
|
code += FunctionStart('F') + "inish" + size_prefix[i] +
|
|
struct_def.name;
|
|
code += "Buffer(FlatBufferBuilder builder, " +
|
|
GenOffsetType(struct_def);
|
|
code += " offset) {";
|
|
code += " builder." + FunctionStart('F') + "inish" + size_prefix[i] +
|
|
"(offset";
|
|
if (lang_.language == IDLOptions::kCSharp) { code += ".Value"; }
|
|
|
|
if (parser_.file_identifier_.length())
|
|
code += ", \"" + parser_.file_identifier_ + "\"";
|
|
code += "); }\n";
|
|
}
|
|
}
|
|
}
|
|
// Only generate key compare function for table,
|
|
// because `key_field` is not set for struct
|
|
if (struct_def.has_key && !struct_def.fixed) {
|
|
FLATBUFFERS_ASSERT(key_field);
|
|
if (lang_.language == IDLOptions::kJava) {
|
|
code += "\n @Override\n protected int keysCompare(";
|
|
code += "Integer o1, Integer o2, ByteBuffer _bb) {";
|
|
code += GenKeyGetter(key_field);
|
|
code += " }\n";
|
|
} else {
|
|
code += "\n public static VectorOffset ";
|
|
code += "CreateSortedVectorOf" + struct_def.name;
|
|
code += "(FlatBufferBuilder builder, ";
|
|
code += "Offset<" + struct_def.name + ">";
|
|
code += "[] offsets) {\n";
|
|
code += " Array.Sort(offsets, (Offset<" + struct_def.name +
|
|
"> o1, Offset<" + struct_def.name + "> o2) => " +
|
|
GenKeyGetter(key_field);
|
|
code += ");\n";
|
|
code += " return builder.CreateVectorOfTables(offsets);\n }\n";
|
|
}
|
|
|
|
code += "\n public static " + struct_def.name + lang_.optional_suffix;
|
|
code += " __lookup_by_key(";
|
|
if (lang_.language == IDLOptions::kJava)
|
|
code += struct_def.name + " obj, ";
|
|
code += "int vectorLocation, ";
|
|
code += GenTypeNameDest(key_field->value.type);
|
|
code += " key, ByteBuffer bb) {\n";
|
|
if (key_field->value.type.base_type == BASE_TYPE_STRING) {
|
|
code += " byte[] byteKey = ";
|
|
if (lang_.language == IDLOptions::kJava)
|
|
code += "key.getBytes(Table.UTF8_CHARSET.get());\n";
|
|
else
|
|
code += "System.Text.Encoding.UTF8.GetBytes(key);\n";
|
|
}
|
|
code += " int span = ";
|
|
code += "bb." + FunctionStart('G') + "etInt(vectorLocation - 4);\n";
|
|
code += " int start = 0;\n";
|
|
code += " while (span != 0) {\n";
|
|
code += " int middle = span / 2;\n";
|
|
code += GenLookupKeyGetter(key_field);
|
|
code += " if (comp > 0) {\n";
|
|
code += " span = middle;\n";
|
|
code += " } else if (comp < 0) {\n";
|
|
code += " middle++;\n";
|
|
code += " start += middle;\n";
|
|
code += " span -= middle;\n";
|
|
code += " } else {\n";
|
|
code += " return ";
|
|
if (lang_.language == IDLOptions::kJava)
|
|
code += "(obj == null ? new " + struct_def.name + "() : obj)";
|
|
else
|
|
code += "new " + struct_def.name + "()";
|
|
code += ".__assign(tableOffset, bb);\n";
|
|
code += " }\n }\n";
|
|
code += " return null;\n";
|
|
code += " }\n";
|
|
}
|
|
code += "}";
|
|
// Java does not need the closing semi-colon on class definitions.
|
|
code += (lang_.language != IDLOptions::kJava) ? ";" : "";
|
|
code += "\n\n";
|
|
}
|
|
const LanguageParameters &lang_;
|
|
// This tracks the current namespace used to determine if a type need to be
|
|
// prefixed by its namespace
|
|
const Namespace *cur_name_space_;
|
|
};
|
|
} // namespace general
|
|
|
|
bool GenerateGeneral(const Parser &parser, const std::string &path,
|
|
const std::string &file_name) {
|
|
general::GeneralGenerator generator(parser, path, file_name);
|
|
return generator.generate();
|
|
}
|
|
|
|
std::string GeneralMakeRule(const Parser &parser, const std::string &path,
|
|
const std::string &file_name) {
|
|
FLATBUFFERS_ASSERT(parser.opts.lang <= IDLOptions::kMAX);
|
|
const auto &lang = GetLangParams(parser.opts.lang);
|
|
|
|
std::string make_rule;
|
|
|
|
for (auto it = parser.enums_.vec.begin(); it != parser.enums_.vec.end();
|
|
++it) {
|
|
auto &enum_def = **it;
|
|
if (!make_rule.empty()) make_rule += " ";
|
|
std::string directory =
|
|
BaseGenerator::NamespaceDir(parser, path, *enum_def.defined_namespace);
|
|
make_rule += directory + enum_def.name + lang.file_extension;
|
|
}
|
|
|
|
for (auto it = parser.structs_.vec.begin(); it != parser.structs_.vec.end();
|
|
++it) {
|
|
auto &struct_def = **it;
|
|
if (!make_rule.empty()) make_rule += " ";
|
|
std::string directory = BaseGenerator::NamespaceDir(
|
|
parser, path, *struct_def.defined_namespace);
|
|
make_rule += directory + struct_def.name + lang.file_extension;
|
|
}
|
|
|
|
make_rule += ": ";
|
|
auto included_files = parser.GetIncludedFilesRecursive(file_name);
|
|
for (auto it = included_files.begin(); it != included_files.end(); ++it) {
|
|
make_rule += " " + *it;
|
|
}
|
|
return make_rule;
|
|
}
|
|
|
|
std::string BinaryFileName(const Parser &parser, const std::string &path,
|
|
const std::string &file_name) {
|
|
auto ext = parser.file_extension_.length() ? parser.file_extension_ : "bin";
|
|
return path + file_name + "." + ext;
|
|
}
|
|
|
|
bool GenerateBinary(const Parser &parser, const std::string &path,
|
|
const std::string &file_name) {
|
|
return !parser.builder_.GetSize() ||
|
|
flatbuffers::SaveFile(
|
|
BinaryFileName(parser, path, file_name).c_str(),
|
|
reinterpret_cast<char *>(parser.builder_.GetBufferPointer()),
|
|
parser.builder_.GetSize(), true);
|
|
}
|
|
|
|
std::string BinaryMakeRule(const Parser &parser, const std::string &path,
|
|
const std::string &file_name) {
|
|
if (!parser.builder_.GetSize()) return "";
|
|
std::string filebase =
|
|
flatbuffers::StripPath(flatbuffers::StripExtension(file_name));
|
|
std::string make_rule =
|
|
BinaryFileName(parser, path, filebase) + ": " + file_name;
|
|
auto included_files =
|
|
parser.GetIncludedFilesRecursive(parser.root_struct_def_->file);
|
|
for (auto it = included_files.begin(); it != included_files.end(); ++it) {
|
|
make_rule += " " + *it;
|
|
}
|
|
return make_rule;
|
|
}
|
|
|
|
} // namespace flatbuffers
|