src/code_generators.cpp - third_party/github/google/flatbuffers - Git at Google

 /*
  * Copyright 2016 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "flatbuffers/code_generators.h"

 #include <assert.h>

 #include <cmath>

 #include "flatbuffers/base.h"
 #include "flatbuffers/util.h"

 #if defined(_MSC_VER)
 #pragma warning(push)
 #pragma warning(disable : 4127)  // C4127: conditional expression is constant
 #endif

 namespace flatbuffers {

 std::string JavaCSharpMakeRule(const bool java, const Parser& parser,
                                const std::string& path,
                                const std::string& file_name) {
   const std::string file_extension = java ? ".java" : ".cs";
   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 + 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 + 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;
 }

 void CodeWriter::operator+=(std::string text) {
   if (!ignore_ident_ && !text.empty()) AppendIdent(stream_);

   while (true) {
     auto begin = text.find("{{");
     if (begin == std::string::npos) {
       break;
     }

     auto end = text.find("}}");
     if (end == std::string::npos || end < begin) {
       break;
     }

     // Write all the text before the first {{ into the stream.
     stream_.write(text.c_str(), begin);

     // The key is between the {{ and }}.
     const std::string key = text.substr(begin + 2, end - begin - 2);

     // Find the value associated with the key.  If it exists, write the
     // value into the stream, otherwise write the key itself into the stream.
     auto iter = value_map_.find(key);
     if (iter != value_map_.end()) {
       const std::string& value = iter->second;
       stream_ << value;
     } else {
       FLATBUFFERS_ASSERT(false && "could not find key");
       stream_ << key;
     }

     // Update the text to everything after the }}.
     text = text.substr(end + 2);
   }
   if (!text.empty() && text.back() == '\\') {
     text.pop_back();
     ignore_ident_ = true;
     stream_ << text;
   } else {
     ignore_ident_ = false;
     stream_ << text << std::endl;
   }
 }

 void CodeWriter::AppendIdent(std::stringstream& stream) {
   int lvl = cur_ident_lvl_;
   while (lvl--) {
     stream.write(pad_.c_str(), static_cast<std::streamsize>(pad_.size()));
   }
 }

 const char* BaseGenerator::FlatBuffersGeneratedWarning() {
   return "automatically generated by the FlatBuffers compiler,"
          " do not modify";
 }

 std::string BaseGenerator::NamespaceDir(const Parser& parser,
                                         const std::string& path,
                                         const Namespace& ns,
                                         const bool dasherize) {
   EnsureDirExists(path);
   if (parser.opts.one_file) return path;
   std::string namespace_dir = path;  // Either empty or ends in separator.
   auto& namespaces = ns.components;
   for (auto it = namespaces.begin(); it != namespaces.end(); ++it) {
     namespace_dir +=
         !dasherize ? *it : ConvertCase(*it, Case::kDasher, Case::kUpperCamel);
     namespace_dir += kPathSeparator;
     EnsureDirExists(namespace_dir);
   }
   return namespace_dir;
 }

 std::string BaseGenerator::NamespaceDir(const Namespace& ns,
                                         const bool dasherize) const {
   return BaseGenerator::NamespaceDir(parser_, path_, ns, dasherize);
 }

 std::string BaseGenerator::FullNamespace(const char* separator,
                                          const Namespace& ns) {
   std::string namespace_name;
   auto& namespaces = ns.components;
   for (auto it = namespaces.begin(); it != namespaces.end(); ++it) {
     if (namespace_name.length()) namespace_name += separator;
     namespace_name += *it;
   }
   return namespace_name;
 }

 std::string BaseGenerator::LastNamespacePart(const Namespace& ns) {
   if (!ns.components.empty())
     return ns.components.back();
   else
     return std::string("");
 }

 // Ensure that a type is prefixed with its namespace.
 std::string BaseGenerator::WrapInNameSpace(const Namespace* ns,
                                            const std::string& name) const {
   std::string qualified_name = qualifying_start_;
   for (auto it = ns->components.begin(); it != ns->components.end(); ++it)
     qualified_name += *it + qualifying_separator_;
   return qualified_name + name;
 }

 std::string BaseGenerator::WrapInNameSpace(const Definition& def,
                                            const std::string& suffix) const {
   return WrapInNameSpace(def.defined_namespace, def.name + suffix);
 }

 std::string BaseGenerator::GetNameSpace(const Definition& def) const {
   const Namespace* ns = def.defined_namespace;
   if (CurrentNameSpace() == ns) return "";
   std::string qualified_name = qualifying_start_;
   for (auto it = ns->components.begin(); it != ns->components.end(); ++it) {
     qualified_name += *it;
     if ((it + 1) != ns->components.end()) {
       qualified_name += qualifying_separator_;
     }
   }

   return qualified_name;
 }

 std::string BaseGenerator::GeneratedFileName(const std::string& path,
                                              const std::string& file_name,
                                              const IDLOptions& options) const {
   return path + file_name + options.filename_suffix + "." +
          (options.filename_extension.empty() ? default_extension_
                                              : options.filename_extension);
 }

 // Generate a documentation comment, if available.
 void GenComment(const std::vector<std::string>& dc, std::string* code_ptr,
                 const CommentConfig* config, const char* prefix) {
   if (dc.begin() == dc.end()) {
     // Don't output empty comment blocks with 0 lines of comment content.
     return;
   }

   std::string& code = *code_ptr;
   if (config != nullptr && config->first_line != nullptr) {
     code += std::string(prefix) + std::string(config->first_line) + "\n";
   }
   std::string line_prefix =
       std::string(prefix) +
       ((config != nullptr && config->content_line_prefix != nullptr)
            ? config->content_line_prefix
            : "///");
   for (auto it = dc.begin(); it != dc.end(); ++it) {
     code += line_prefix + *it + "\n";
   }
   if (config != nullptr && config->last_line != nullptr) {
     code += std::string(prefix) + std::string(config->last_line) + "\n";
   }
 }

 template <typename T>
 std::string FloatConstantGenerator::GenFloatConstantImpl(
     const FieldDef& field) const {
   const auto& constant = field.value.constant;
   T v;
   auto done = StringToNumber(constant.c_str(), &v);
   FLATBUFFERS_ASSERT(done);
   if (done) {
 #if (!defined(_MSC_VER) || (_MSC_VER >= 1800))
     if (std::isnan(v)) return NaN(v);
     if (std::isinf(v)) return Inf(v);
 #endif
     return Value(v, constant);
   }
   return "#";  // compile time error
 }

 std::string FloatConstantGenerator::GenFloatConstant(
     const FieldDef& field) const {
   switch (field.value.type.base_type) {
     case BASE_TYPE_FLOAT:
       return GenFloatConstantImpl<float>(field);
     case BASE_TYPE_DOUBLE:
       return GenFloatConstantImpl<double>(field);
     default: {
       FLATBUFFERS_ASSERT(false);
       return "INVALID_BASE_TYPE";
     }
   };
 }

 TypedFloatConstantGenerator::TypedFloatConstantGenerator(
     const char* double_prefix, const char* single_prefix,
     const char* nan_number, const char* pos_inf_number,
     const char* neg_inf_number)
     : double_prefix_(double_prefix),
       single_prefix_(single_prefix),
       nan_number_(nan_number),
       pos_inf_number_(pos_inf_number),
       neg_inf_number_(neg_inf_number) {}

 std::string TypedFloatConstantGenerator::MakeNaN(
     const std::string& prefix) const {
   return prefix + nan_number_;
 }
 std::string TypedFloatConstantGenerator::MakeInf(
     bool neg, const std::string& prefix) const {
   if (neg)
     return !neg_inf_number_.empty() ? (prefix + neg_inf_number_)
                                     : ("-" + prefix + pos_inf_number_);
   else
     return prefix + pos_inf_number_;
 }

 std::string TypedFloatConstantGenerator::Value(double v,
                                                const std::string& src) const {
   (void)v;
   return src;
 }

 std::string TypedFloatConstantGenerator::Inf(double v) const {
   return MakeInf(v < 0, double_prefix_);
 }

 std::string TypedFloatConstantGenerator::NaN(double v) const {
   (void)v;
   return MakeNaN(double_prefix_);
 }

 std::string TypedFloatConstantGenerator::Value(float v,
                                                const std::string& src) const {
   (void)v;
   return src + "f";
 }

 std::string TypedFloatConstantGenerator::Inf(float v) const {
   return MakeInf(v < 0, single_prefix_);
 }

 std::string TypedFloatConstantGenerator::NaN(float v) const {
   (void)v;
   return MakeNaN(single_prefix_);
 }

 SimpleFloatConstantGenerator::SimpleFloatConstantGenerator(
     const char* nan_number, const char* pos_inf_number,
     const char* neg_inf_number)
     : nan_number_(nan_number),
       pos_inf_number_(pos_inf_number),
       neg_inf_number_(neg_inf_number) {}

 std::string SimpleFloatConstantGenerator::Value(double v,
                                                 const std::string& src) const {
   (void)v;
   return src;
 }

 std::string SimpleFloatConstantGenerator::Inf(double v) const {
   return (v < 0) ? neg_inf_number_ : pos_inf_number_;
 }

 std::string SimpleFloatConstantGenerator::NaN(double v) const {
   (void)v;
   return nan_number_;
 }

 std::string SimpleFloatConstantGenerator::Value(float v,
                                                 const std::string& src) const {
   return this->Value(static_cast<double>(v), src);
 }

 std::string SimpleFloatConstantGenerator::Inf(float v) const {
   return this->Inf(static_cast<double>(v));
 }

 std::string SimpleFloatConstantGenerator::NaN(float v) const {
   return this->NaN(static_cast<double>(v));
 }

 }  // namespace flatbuffers

 #if defined(_MSC_VER)
 #pragma warning(pop)
 #endif
	/*
	* Copyright 2016 Google Inc. All rights reserved.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "flatbuffers/code_generators.h"

	#include <assert.h>

	#include <cmath>

	#include "flatbuffers/base.h"
	#include "flatbuffers/util.h"

	#if defined(_MSC_VER)
	#pragma warning(push)
	#pragma warning(disable : 4127) // C4127: conditional expression is constant
	#endif

	namespace flatbuffers {

	std::string JavaCSharpMakeRule(const bool java, const Parser& parser,
	const std::string& path,
	const std::string& file_name) {
	const std::string file_extension = java ? ".java" : ".cs";
	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 + 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 + 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;
	}

	void CodeWriter::operator+=(std::string text) {
	if (!ignore_ident_ && !text.empty()) AppendIdent(stream_);

	while (true) {
	auto begin = text.find("{{");
	if (begin == std::string::npos) {
	break;
	}

	auto end = text.find("}}");
	if (end == std::string::npos \|\| end < begin) {
	break;
	}

	// Write all the text before the first {{ into the stream.
	stream_.write(text.c_str(), begin);

	// The key is between the {{ and }}.
	const std::string key = text.substr(begin + 2, end - begin - 2);

	// Find the value associated with the key. If it exists, write the
	// value into the stream, otherwise write the key itself into the stream.
	auto iter = value_map_.find(key);
	if (iter != value_map_.end()) {
	const std::string& value = iter->second;
	stream_ << value;
	} else {
	FLATBUFFERS_ASSERT(false && "could not find key");
	stream_ << key;
	}

	// Update the text to everything after the }}.
	text = text.substr(end + 2);
	}
	if (!text.empty() && text.back() == '\\') {
	text.pop_back();
	ignore_ident_ = true;
	stream_ << text;
	} else {
	ignore_ident_ = false;
	stream_ << text << std::endl;
	}
	}

	void CodeWriter::AppendIdent(std::stringstream& stream) {
	int lvl = cur_ident_lvl_;
	while (lvl--) {
	stream.write(pad_.c_str(), static_cast<std::streamsize>(pad_.size()));
	}
	}

	const char* BaseGenerator::FlatBuffersGeneratedWarning() {
	return "automatically generated by the FlatBuffers compiler,"
	" do not modify";
	}

	std::string BaseGenerator::NamespaceDir(const Parser& parser,
	const std::string& path,
	const Namespace& ns,
	const bool dasherize) {
	EnsureDirExists(path);
	if (parser.opts.one_file) return path;
	std::string namespace_dir = path; // Either empty or ends in separator.
	auto& namespaces = ns.components;
	for (auto it = namespaces.begin(); it != namespaces.end(); ++it) {
	namespace_dir +=
	!dasherize ? it : ConvertCase(it, Case::kDasher, Case::kUpperCamel);
	namespace_dir += kPathSeparator;
	EnsureDirExists(namespace_dir);
	}
	return namespace_dir;
	}

	std::string BaseGenerator::NamespaceDir(const Namespace& ns,
	const bool dasherize) const {
	return BaseGenerator::NamespaceDir(parser_, path_, ns, dasherize);
	}

	std::string BaseGenerator::FullNamespace(const char* separator,
	const Namespace& ns) {
	std::string namespace_name;
	auto& namespaces = ns.components;
	for (auto it = namespaces.begin(); it != namespaces.end(); ++it) {
	if (namespace_name.length()) namespace_name += separator;
	namespace_name += *it;
	}
	return namespace_name;
	}

	std::string BaseGenerator::LastNamespacePart(const Namespace& ns) {
	if (!ns.components.empty())
	return ns.components.back();
	else
	return std::string("");
	}

	// Ensure that a type is prefixed with its namespace.
	std::string BaseGenerator::WrapInNameSpace(const Namespace* ns,
	const std::string& name) const {
	std::string qualified_name = qualifying_start_;
	for (auto it = ns->components.begin(); it != ns->components.end(); ++it)
	qualified_name += *it + qualifying_separator_;
	return qualified_name + name;
	}

	std::string BaseGenerator::WrapInNameSpace(const Definition& def,
	const std::string& suffix) const {
	return WrapInNameSpace(def.defined_namespace, def.name + suffix);
	}

	std::string BaseGenerator::GetNameSpace(const Definition& def) const {
	const Namespace* ns = def.defined_namespace;
	if (CurrentNameSpace() == ns) return "";
	std::string qualified_name = qualifying_start_;
	for (auto it = ns->components.begin(); it != ns->components.end(); ++it) {
	qualified_name += *it;
	if ((it + 1) != ns->components.end()) {
	qualified_name += qualifying_separator_;
	}
	}

	return qualified_name;
	}

	std::string BaseGenerator::GeneratedFileName(const std::string& path,
	const std::string& file_name,
	const IDLOptions& options) const {
	return path + file_name + options.filename_suffix + "." +
	(options.filename_extension.empty() ? default_extension_
	: options.filename_extension);
	}

	// Generate a documentation comment, if available.
	void GenComment(const std::vector<std::string>& dc, std::string* code_ptr,
	const CommentConfig* config, const char* prefix) {
	if (dc.begin() == dc.end()) {
	// Don't output empty comment blocks with 0 lines of comment content.
	return;
	}

	std::string& code = *code_ptr;
	if (config != nullptr && config->first_line != nullptr) {
	code += std::string(prefix) + std::string(config->first_line) + "\n";
	}
	std::string line_prefix =
	std::string(prefix) +
	((config != nullptr && config->content_line_prefix != nullptr)
	? config->content_line_prefix
	: "///");
	for (auto it = dc.begin(); it != dc.end(); ++it) {
	code += line_prefix + *it + "\n";
	}
	if (config != nullptr && config->last_line != nullptr) {
	code += std::string(prefix) + std::string(config->last_line) + "\n";
	}
	}

	template <typename T>
	std::string FloatConstantGenerator::GenFloatConstantImpl(
	const FieldDef& field) const {
	const auto& constant = field.value.constant;
	T v;
	auto done = StringToNumber(constant.c_str(), &v);
	FLATBUFFERS_ASSERT(done);
	if (done) {
	#if (!defined(_MSC_VER) \|\| (_MSC_VER >= 1800))
	if (std::isnan(v)) return NaN(v);
	if (std::isinf(v)) return Inf(v);
	#endif
	return Value(v, constant);
	}
	return "#"; // compile time error
	}

	std::string FloatConstantGenerator::GenFloatConstant(
	const FieldDef& field) const {
	switch (field.value.type.base_type) {
	case BASE_TYPE_FLOAT:
	return GenFloatConstantImpl<float>(field);
	case BASE_TYPE_DOUBLE:
	return GenFloatConstantImpl<double>(field);
	default: {
	FLATBUFFERS_ASSERT(false);
	return "INVALID_BASE_TYPE";
	}
	};
	}

	TypedFloatConstantGenerator::TypedFloatConstantGenerator(
	const char* double_prefix, const char* single_prefix,
	const char* nan_number, const char* pos_inf_number,
	const char* neg_inf_number)
	: double_prefix_(double_prefix),
	single_prefix_(single_prefix),
	nan_number_(nan_number),
	pos_inf_number_(pos_inf_number),
	neg_inf_number_(neg_inf_number) {}

	std::string TypedFloatConstantGenerator::MakeNaN(
	const std::string& prefix) const {
	return prefix + nan_number_;
	}
	std::string TypedFloatConstantGenerator::MakeInf(
	bool neg, const std::string& prefix) const {
	if (neg)
	return !neg_inf_number_.empty() ? (prefix + neg_inf_number_)
	: ("-" + prefix + pos_inf_number_);
	else
	return prefix + pos_inf_number_;
	}

	std::string TypedFloatConstantGenerator::Value(double v,
	const std::string& src) const {
	(void)v;
	return src;
	}

	std::string TypedFloatConstantGenerator::Inf(double v) const {
	return MakeInf(v < 0, double_prefix_);
	}

	std::string TypedFloatConstantGenerator::NaN(double v) const {
	(void)v;
	return MakeNaN(double_prefix_);
	}

	std::string TypedFloatConstantGenerator::Value(float v,
	const std::string& src) const {
	(void)v;
	return src + "f";
	}

	std::string TypedFloatConstantGenerator::Inf(float v) const {
	return MakeInf(v < 0, single_prefix_);
	}

	std::string TypedFloatConstantGenerator::NaN(float v) const {
	(void)v;
	return MakeNaN(single_prefix_);
	}

	SimpleFloatConstantGenerator::SimpleFloatConstantGenerator(
	const char* nan_number, const char* pos_inf_number,
	const char* neg_inf_number)
	: nan_number_(nan_number),
	pos_inf_number_(pos_inf_number),
	neg_inf_number_(neg_inf_number) {}

	std::string SimpleFloatConstantGenerator::Value(double v,
	const std::string& src) const {
	(void)v;
	return src;
	}

	std::string SimpleFloatConstantGenerator::Inf(double v) const {
	return (v < 0) ? neg_inf_number_ : pos_inf_number_;
	}

	std::string SimpleFloatConstantGenerator::NaN(double v) const {
	(void)v;
	return nan_number_;
	}

	std::string SimpleFloatConstantGenerator::Value(float v,
	const std::string& src) const {
	return this->Value(static_cast<double>(v), src);
	}

	std::string SimpleFloatConstantGenerator::Inf(float v) const {
	return this->Inf(static_cast<double>(v));
	}

	std::string SimpleFloatConstantGenerator::NaN(float v) const {
	return this->NaN(static_cast<double>(v));
	}

	} // namespace flatbuffers

	#if defined(_MSC_VER)
	#pragma warning(pop)
	#endif