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t_cpp_generator.cc
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t_cpp_generator.cc
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
* Contains some contributions under the Thrift Software License.
* Please see doc/old-thrift-license.txt in the Thrift distribution for
* details.
*/
#include <cassert>
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#ifdef SANDESH
#include <algorithm>
#endif
#include <sys/stat.h>
#include <boost/tuple/tuple.hpp>
#include "platform.h"
#include "t_oop_generator.h"
using namespace std;
using boost::tuple;
using boost::tuples::make_tuple;
/**
* C++ code generator. This is legitimacy incarnate.
*
*/
class t_cpp_generator : public t_oop_generator {
public:
t_cpp_generator(
t_program* program,
const std::map<std::string, std::string>& parsed_options,
const std::string& option_string)
: t_oop_generator(program)
{
(void) option_string;
std::map<std::string, std::string>::const_iterator iter;
iter = parsed_options.find("pure_enums");
gen_pure_enums_ = (iter != parsed_options.end());
iter = parsed_options.find("dense");
gen_dense_ = (iter != parsed_options.end());
iter = parsed_options.find("include_prefix");
use_include_prefix_ = (iter != parsed_options.end());
iter = parsed_options.find("cob_style");
gen_cob_style_ = (iter != parsed_options.end());
iter = parsed_options.find("no_client_completion");
gen_no_client_completion_ = (iter != parsed_options.end());
iter = parsed_options.find("templates");
gen_templates_ = (iter != parsed_options.end());
out_dir_base_ = "gen-cpp";
}
/**
* Init and close methods
*/
void init_generator();
void close_generator();
void generate_consts(std::vector<t_const*> consts);
/**
* Program-level generation functions
*/
void generate_typedef(t_typedef* ttypedef);
void generate_enum(t_enum* tenum);
void generate_struct(t_struct* tstruct) {
generate_cpp_struct(tstruct, false);
}
void generate_xception(t_struct* txception) {
generate_cpp_struct(txception, true);
}
#ifdef SANDESH
void generate_sandesh(t_sandesh* tsandesh) {
generate_cpp_sandesh(tsandesh);
}
void generate_cpp_sandesh(t_sandesh* tsandesh);
void generate_sandesh_definition (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_fingerprint (std::ofstream& out, t_sandesh* tsandesh, bool is_definition);
void generate_sandesh_http_reader (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_reader (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_writer (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_creator (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_member_init_list(std::ofstream& out, t_sandesh* tsandesh, bool init_dval = false);
void generate_sandesh_base_init (ofstream& out, t_sandesh* tsandesh, bool init_dval);
void generate_sandesh_hints (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_request (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_default_ctor (std::ofstream& out, t_sandesh* tsandesh, bool is_request);
void generate_sandesh_loggers (std::ofstream& out, t_sandesh* tsandesh);
void generate_logger_field (std::ofstream& out, t_field *tfield, string prefix, bool log_value_only, bool no_name_log, bool for_sandesh = false);
void generate_logger_struct (std::ofstream& out, t_struct *tstruct, string prefix, string name);
void generate_logger_container (std::ofstream& out, t_type* ttype, string name, bool log_value_only);
void generate_logger_map_element (std::ofstream& out, t_map* tmap, string iter, bool log_value_only);
void generate_logger_set_element (std::ofstream& out, t_set* tset, string iter, bool log_value_only);
void generate_logger_list_element (std::ofstream& out, t_list* tlist, string iter, bool log_value_only);
void generate_sandesh_get_size (std::ofstream& out, t_sandesh* tsandesh);
void generate_get_size_field (std::ofstream& out, t_field *tfield);
void generate_get_size_struct (std::ofstream& out, t_struct *tstruct, string name);
void generate_get_size_container (std::ofstream& out, t_type* ttype, string name);
void generate_get_size_map_element (std::ofstream& out, t_map* tmap, string name);
void generate_get_size_list_element(std::ofstream& out, t_list* ttype, string name);
void generate_get_size_set_element (std::ofstream& out, t_set* ttype, string name);
void generate_sandesh_trace (std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_context (std::ofstream& out, t_sandesh* tsandesh, string val);
void generate_sandesh_seqnum(std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_versionsig(std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_static_seqnum_def(std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_static_versionsig_def(std::ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_trace_seqnum_ctor(std::ofstream& out, t_sandesh* tsandesh);
void generate_static_const_string_definition(std::ofstream& out, t_sandesh* tsandesh);
std::string generate_sandesh_no_static_const_string_function(t_sandesh *tsandesh, bool signature, bool autogen_darg, bool trace = false, bool request = false, bool ctorcall = false);
void generate_static_const_string_definition(std::ofstream& out, std::string name,
const vector<t_field*>& fields);
std::string generate_sandesh_async_creator(t_sandesh *tsandesh, bool signature, bool expand_autogen, bool skip_autogen,
std::string prefix, std::string suffix, bool category_level_file_line_first,
bool autogen_category_level, bool drop_log_reason, bool use_sandesh_object = false);
void generate_sandesh_async_creator_helper(ofstream &out, t_sandesh *tsandesh, bool use_sandesh);
void generate_sandesh_async_creators(ofstream &out, t_sandesh *tsandesh);
void generate_sandesh_direct_send(ofstream &out, t_sandesh *tsandesh);
void generate_sandesh_uve_creator(std::ofstream& out, t_sandesh* tsandesh);
std::string generate_sandesh_trace_creator(t_sandesh *tsandesh, bool signature, bool expand_autogen, bool skip_autogen,
std::string prefix, std::string suffix);
void generate_sandesh_updater(ofstream& out, t_sandesh* tsandesh);
void generate_isRatelimitPass(ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_static_rate_limit_log_def(ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_static_rate_limit_mutex_def(ofstream& out, t_sandesh* tsandesh);
void generate_sandesh_static_rate_limit_buffer_def(ofstream& out, t_sandesh* tsandesh);
void derived_stats_info(t_struct* tstruct,
// val is rawtype,resulttype,algo,annotation
map<string,tuple<string,string,string,string> >& dsmap,
// val is set of ds attributes
map<string,set<string> >& rawmap);
typedef enum {
MANDATORY = 0,
INLINE = 1,
HIDDEN = 2,
PERIODIC = 3,
MAX = 4
} CacheAttribute;
void cache_attr_info(t_struct* tstruct, std::map<string, CacheAttribute>& attrs);
void freq_info(t_struct* tstruct,
set<string>& inl, set<string>& never, set<string>& periodic);
#endif
void generate_cpp_struct(t_struct* tstruct, bool is_exception);
void generate_service(t_service* tservice);
void print_const_value(std::ofstream& out, std::string name, t_type* type, t_const_value* value);
std::string render_const_value(std::ofstream& out, std::string name, t_type* type, t_const_value* value);
void generate_struct_definition (std::ofstream& out, t_struct* tstruct, bool is_exception=false, bool pointers=false, bool read=true, bool write=true);
void generate_struct_fingerprint (std::ofstream& out, t_struct* tstruct, bool is_definition);
void generate_struct_reader (std::ofstream& out, t_struct* tstruct, bool pointers=false);
void generate_struct_writer (std::ofstream& out, t_struct* tstruct, bool pointers=false);
void generate_struct_result_writer (std::ofstream& out, t_struct* tstruct, bool pointers=false);
#ifdef SANDESH
void generate_static_const_string_definition(std::ofstream& out, t_struct* tstruct);
void generate_struct_logger (ofstream& out, const string& name,
const vector<t_field*>& fields);
void generate_struct_get_size (ofstream& out, const string& name,
const vector<t_field*>& fields);
#endif
/**
* Service-level generation functions
*/
void generate_service_interface (t_service* tservice, string style);
void generate_service_interface_factory (t_service* tservice, string style);
void generate_service_null (t_service* tservice, string style);
void generate_service_multiface (t_service* tservice);
void generate_service_helpers (t_service* tservice);
void generate_service_client (t_service* tservice, string style);
void generate_service_processor (t_service* tservice, string style);
void generate_service_skeleton (t_service* tservice);
void generate_process_function (t_service* tservice, t_function* tfunction,
string style, bool specialized=false);
void generate_function_helpers (t_service* tservice, t_function* tfunction);
void generate_service_async_skeleton (t_service* tservice);
/**
* Serialization constructs
*/
void generate_deserialize_field (std::ofstream& out,
t_field* tfield,
std::string prefix="",
std::string suffix="");
void generate_deserialize_struct (std::ofstream& out,
t_struct* tstruct,
std::string prefix="");
void generate_deserialize_container (std::ofstream& out,
t_type* ttype,
std::string prefix="");
void generate_deserialize_set_element (std::ofstream& out,
t_set* tset,
std::string prefix="");
void generate_deserialize_map_element (std::ofstream& out,
t_map* tmap,
std::string prefix="");
void generate_deserialize_list_element (std::ofstream& out,
t_list* tlist,
std::string prefix,
bool push_back,
std::string index);
void generate_serialize_field (std::ofstream& out,
t_field* tfield,
std::string prefix="",
std::string suffix="");
void generate_serialize_struct (std::ofstream& out,
t_struct* tstruct,
std::string prefix="");
void generate_serialize_container (std::ofstream& out,
t_type* ttype,
std::string prefix="");
void generate_serialize_map_element (std::ofstream& out,
t_map* tmap,
std::string iter);
void generate_serialize_set_element (std::ofstream& out,
t_set* tmap,
std::string iter);
void generate_serialize_list_element (std::ofstream& out,
t_list* tlist,
std::string iter);
void generate_function_call (ostream& out,
t_function* tfunction,
string target,
string iface,
string arg_prefix);
#ifdef SANDESH
void generate_serialize_sandesh (std::ofstream& out,
t_sandesh* tsandesh,
std::string prefix="");
#endif
/*
* Helper rendering functions
*/
std::string namespace_prefix(std::string ns);
std::string namespace_open(std::string ns);
std::string namespace_close(std::string ns);
std::string type_name(t_type* ttype, bool in_typedef=false, bool arg=false);
std::string base_type_name(t_base_type::t_base tbase);
#ifdef SANDESH
std::string declare_field(t_field* tfield, bool init=false, bool pointer=false, bool constant=false, bool reference=false, bool constructor=false);
#else
std::string declare_field(t_field* tfield, bool init=false, bool pointer=false, bool constant=false, bool reference=false);
#endif
std::string function_signature(t_function* tfunction, std::string style, std::string prefix="", bool name_params=true);
std::string cob_function_signature(t_function* tfunction, std::string prefix="", bool name_params=true);
std::string argument_list(t_struct* tstruct, bool name_params=true, bool start_comma=false);
std::string type_to_enum(t_type* ttype);
std::string local_reflection_name(const char*, t_type* ttype, bool external=false);
void generate_enum_constant_list(std::ofstream& f,
const vector<t_enum_value*>& constants,
const char* prefix,
const char* suffix,
bool include_values);
// These handles checking gen_dense_ and checking for duplicates.
void generate_local_reflection(std::ofstream& out, t_type* ttype, bool is_definition);
void generate_local_reflection_pointer(std::ofstream& out, t_type* ttype);
bool is_complex_type(t_type* ttype) {
ttype = get_true_type(ttype);
return
ttype->is_container() ||
ttype->is_struct() ||
ttype->is_xception() ||
#ifdef SANDESH
ttype->is_sandesh() ||
(ttype->is_base_type() && (((t_base_type *)ttype)->get_base() == t_base_type::TYPE_XML)) ||
#endif
(ttype->is_base_type() && (((t_base_type*)ttype)->get_base() == t_base_type::TYPE_STRING));
}
void set_use_include_prefix(bool use_include_prefix) {
use_include_prefix_ = use_include_prefix;
}
private:
/**
* Returns the include prefix to use for a file generated by program, or the
* empty string if no include prefix should be used.
*/
std::string get_include_prefix(const t_program& program) const;
/**
* True if we should generate pure enums for Thrift enums, instead of wrapper classes.
*/
bool gen_pure_enums_;
/**
* True if we should generate local reflection metadata for TDenseProtocol.
*/
bool gen_dense_;
/**
* True if we should generate templatized reader/writer methods.
*/
bool gen_templates_;
/**
* True if we should use a path prefix in our #include statements for other
* thrift-generated header files.
*/
bool use_include_prefix_;
/**
* True if we should generate "Continuation OBject"-style classes as well.
*/
bool gen_cob_style_;
/**
* True if we should omit calls to completion__() in CobClient class.
*/
bool gen_no_client_completion_;
/**
* Strings for namespace, computed once up front then used directly
*/
std::string ns_open_;
std::string ns_close_;
/**
* File streams, stored here to avoid passing them as parameters to every
* function.
*/
std::ofstream f_types_;
std::ofstream f_types_impl_;
std::ofstream f_types_tcc_;
std::ofstream f_header_;
std::ofstream f_service_;
std::ofstream f_service_tcc_;
#ifdef SANDESH
std::ofstream f_request_impl_;
std::ofstream f_html_template_;
struct sandesh_logger {
enum type {
BUFFER,
LOG,
FORCED_LOG,
DROP_LOG,
};
};
void generate_sandesh_logger(std::ofstream& out, t_sandesh* tsandesh,
sandesh_logger::type ltype, bool use_sandesh = false);
#endif
/**
* When generating local reflections, make sure we don't generate duplicates.
*/
std::set<std::string> reflected_fingerprints_;
// The ProcessorGenerator is used to generate parts of the code,
// so it needs access to many of our protected members and methods.
//
// TODO: The code really should be cleaned up so that helper methods for
// writing to the output files are separate from the generator classes
// themselves.
friend class ProcessorGenerator;
};
/**
* Prepares for file generation by opening up the necessary file output
* streams.
*/
void t_cpp_generator::init_generator() {
// Make output directory
MKDIR(get_out_dir().c_str());
// Make output file
string f_types_name = get_out_dir()+program_name_+"_types.h";
f_types_.open(f_types_name.c_str());
string f_types_impl_name = get_out_dir()+program_name_+"_types.cpp";
f_types_impl_.open(f_types_impl_name.c_str());
#ifdef SANDESH
string f_request_impl_name = get_out_dir()+program_name_+"_request_skeleton.cpp";
f_request_impl_.open(f_request_impl_name.c_str());
string f_html_template_name = get_out_dir()+program_name_+"_html_template.cpp";
f_html_template_.open(f_html_template_name.c_str());
#endif
if (gen_templates_) {
// If we don't open the stream, it appears to just discard data,
// which is fine.
string f_types_tcc_name = get_out_dir()+program_name_+"_types.tcc";
f_types_tcc_.open(f_types_tcc_name.c_str());
}
// Print header
f_types_ <<
autogen_comment();
f_types_impl_ <<
autogen_comment();
f_types_tcc_ <<
autogen_comment();
#ifdef SANDESH
f_request_impl_ <<
autogen_comment();
f_html_template_ <<
autogen_comment();
#endif
// Start ifndef
f_types_ <<
"#ifndef " << program_name_ << "_TYPES_H" << endl <<
"#define " << program_name_ << "_TYPES_H" << endl <<
endl;
f_types_tcc_ <<
"#ifndef " << program_name_ << "_TYPES_TCC" << endl <<
"#define " << program_name_ << "_TYPES_TCC" << endl <<
endl;
// Include base types
f_types_ <<
"#include <sandesh/Thrift.h>" << endl <<
#ifndef SANDESH
"#include <TApplicationException.h>" << endl <<
#else
"#include <boost/shared_ptr.hpp>" << endl <<
"#include <sandesh/derived_stats.h>" << endl <<
"#include <sandesh/derived_stats_algo.h>" << endl <<
"#include <boost/pointer_cast.hpp>" << endl <<
#endif
"#include <base/trace.h>" << endl;
if (program_name_ != "sandesh") {
f_types_ << "#include <sandesh/sandesh_constants.h>" << endl;
}
f_types_ <<
"#include <sandesh/protocol/TProtocol.h>" << endl <<
"#include <sandesh/transport/TTransport.h>" << endl <<
endl;
// Include other Thrift includes
const vector<t_program*>& includes = program_->get_includes();
for (size_t i = 0; i < includes.size(); ++i) {
f_types_ <<
"#include \"" << get_include_prefix(*(includes[i])) <<
includes[i]->get_name() << "_types.h\"" << endl;
// XXX(simpkins): If gen_templates_ is enabled, we currently assume all
// included files were also generated with templates enabled.
f_types_tcc_ <<
"#include \"" << get_include_prefix(*(includes[i])) <<
includes[i]->get_name() << "_types.tcc\"" << endl;
}
f_types_ << endl;
// Include custom headers
const vector<string>& cpp_includes = program_->get_cpp_includes();
for (size_t i = 0; i < cpp_includes.size(); ++i) {
if (cpp_includes[i][0] == '<') {
f_types_ <<
"#include " << cpp_includes[i] << endl;
} else {
f_types_ <<
"#include \"" << cpp_includes[i] << "\"" << endl;
}
}
f_types_ <<
endl;
// Include the types file
#ifdef SANDESH
f_types_impl_ <<
"#include <boost/date_time/posix_time/posix_time.hpp>" << endl << endl <<
"#include <base/logging.h>" << endl << endl <<
"#include <sandesh/sandesh_types.h>" << endl <<
"#include <sandesh/sandesh_constants.h>" << endl <<
"#include <sandesh/sandesh.h>" << endl <<
"#include <sandesh/sandesh_uve.h>" << endl <<
"#include <sandesh/sandesh_http.h>" << endl <<
"#include <sandesh/sandesh_trace.h>" << endl <<
"#include <curl/curl.h>" << endl << endl;
#endif
f_types_impl_ <<
"#include \"" << get_include_prefix(*get_program()) << program_name_ <<
"_types.h\"" << endl <<
endl;
f_types_tcc_ <<
"#include \"" << get_include_prefix(*get_program()) << program_name_ <<
"_types.h\"" << endl <<
endl;
#ifdef SANDESH
f_request_impl_ <<
"#include <sandesh/sandesh_types.h>" << endl <<
"#include <sandesh/sandesh_constants.h>" << endl <<
"#include <sandesh/sandesh.h>" << endl <<
"#include \"" << get_include_prefix(*get_program()) << program_name_ <<
"_types.h\"" << endl <<
endl;
f_html_template_ <<
"#include <sandesh/sandesh_http.h>" << endl;
f_html_template_ <<
"static SandeshHttp::HtmlInfo h_info(" <<
program_name_ << "_xml," << program_name_ << "_xml_len);" << endl;
f_html_template_ <<
"static SandeshHttp sh(\"" << program_name_ << ".xml\", h_info);" << endl;
f_html_template_ << "int " << program_name_ << "_marker = 0;" << endl;
#endif
// If we are generating local reflection metadata, we need to include
// the definition of TypeSpec.
if (gen_dense_) {
f_types_impl_ <<
"#include <TReflectionLocal.h>" << endl <<
endl;
}
// Open namespace
ns_open_ = namespace_open(program_->get_namespace("cpp"));
ns_close_ = namespace_close(program_->get_namespace("cpp"));
f_types_ <<
ns_open_ << endl <<
endl;
f_types_impl_ <<
ns_open_ << endl <<
endl;
f_types_tcc_ <<
ns_open_ << endl <<
endl;
#ifdef SANDESH
f_request_impl_ <<
ns_open_ << endl <<
endl;
#endif
}
/**
* Closes the output files.
*/
void t_cpp_generator::close_generator() {
// Close namespace
f_types_ <<
ns_close_ << endl <<
endl;
f_types_impl_ <<
ns_close_ << endl;
f_types_tcc_ <<
ns_close_ << endl <<
endl;
#ifdef SANDESH
f_request_impl_ <<
ns_close_ << endl;
#endif
// Include the types.tcc file from the types header file,
// so clients don't have to explicitly include the tcc file.
// TODO(simpkins): Make this a separate option.
if (gen_templates_) {
f_types_ <<
"#include \"" << get_include_prefix(*get_program()) << program_name_ <<
"_types.tcc\"" << endl <<
endl;
}
// Close ifndef
f_types_ <<
"#endif" << endl;
f_types_tcc_ <<
"#endif" << endl;
// Close output file
f_types_.close();
f_types_impl_.close();
f_types_tcc_.close();
#ifdef SANDESH
f_request_impl_.close();
f_html_template_.close();
#endif
}
/**
* Generates a typedef. This is just a simple 1-liner in C++
*
* @param ttypedef The type definition
*/
void t_cpp_generator::generate_typedef(t_typedef* ttypedef) {
f_types_ <<
indent() << "typedef " << type_name(ttypedef->get_type(), true) << " " << ttypedef->get_symbolic() << ";" << endl <<
endl;
}
void t_cpp_generator::generate_enum_constant_list(std::ofstream& f,
const vector<t_enum_value*>& constants,
const char* prefix,
const char* suffix,
bool include_values) {
f << " {" << endl;
indent_up();
vector<t_enum_value*>::const_iterator c_iter;
bool first = true;
for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
if (first) {
first = false;
} else {
f << "," << endl;
}
indent(f)
<< prefix << (*c_iter)->get_name() << suffix;
if (include_values && (*c_iter)->has_value()) {
f << " = " << (*c_iter)->get_value();
}
}
f << endl;
indent_down();
indent(f) << "};" << endl;
}
/**
* Generates code for an enumerated type. In C++, this is essentially the same
* as the thrift definition itself, using the enum keyword in C++.
*
* @param tenum The enumeration
*/
void t_cpp_generator::generate_enum(t_enum* tenum) {
vector<t_enum_value*> constants = tenum->get_constants();
std::string enum_name = tenum->get_name();
if (!gen_pure_enums_) {
enum_name = "type";
f_types_ <<
indent() << "struct " << tenum->get_name() << " {" << endl;
indent_up();
}
f_types_ <<
indent() << "enum " << enum_name;
generate_enum_constant_list(f_types_, constants, "", "", true);
if (!gen_pure_enums_) {
indent_down();
f_types_ << "};" << endl;
}
f_types_ << endl;
/**
Generate a character array of enum names for debugging purposes.
*/
std::string prefix = "";
if (!gen_pure_enums_) {
prefix = tenum->get_name() + "::";
}
f_types_impl_ <<
indent() << "int _k" << tenum->get_name() << "Values[] =";
generate_enum_constant_list(f_types_impl_, constants, prefix.c_str(), "", false);
f_types_impl_ <<
indent() << "const char* _k" << tenum->get_name() << "Names[] =";
generate_enum_constant_list(f_types_impl_, constants, "\"", "\"", false);
f_types_ <<
indent() << "extern const std::map<int, const char*> _" <<
tenum->get_name() << "_VALUES_TO_NAMES;" << endl << endl;
f_types_impl_ <<
indent() << "const std::map<int, const char*> _" << tenum->get_name() <<
"_VALUES_TO_NAMES(::contrail::sandesh::TEnumIterator(" << constants.size() <<
", _k" << tenum->get_name() << "Values" <<
", _k" << tenum->get_name() << "Names), " <<
"::contrail::sandesh::TEnumIterator(-1, NULL, NULL));" << endl << endl;
generate_local_reflection(f_types_, tenum, false);
generate_local_reflection(f_types_impl_, tenum, true);
}
/**
* Generates a class that holds all the constants.
*/
void t_cpp_generator::generate_consts(std::vector<t_const*> consts) {
string f_consts_name = get_out_dir()+program_name_+"_constants.h";
ofstream f_consts;
f_consts.open(f_consts_name.c_str());
string f_consts_impl_name = get_out_dir()+program_name_+"_constants.cpp";
ofstream f_consts_impl;
f_consts_impl.open(f_consts_impl_name.c_str());
// Print header
f_consts <<
autogen_comment();
f_consts_impl <<
autogen_comment();
// Start ifndef
f_consts <<
"#ifndef " << program_name_ << "_CONSTANTS_H" << endl <<
"#define " << program_name_ << "_CONSTANTS_H" << endl <<
endl <<
"#include \"" << get_include_prefix(*get_program()) << program_name_ <<
"_types.h\"" << endl <<
endl <<
ns_open_ << endl <<
endl;
#ifdef SANDESH
f_consts_impl <<
"#include <base/trace.h>" << endl <<
"#include <sandesh/sandesh_types.h>" << endl <<
"#include <sandesh/sandesh_constants.h>" << endl <<
"#include <sandesh/sandesh.h>" << endl <<
"#include <sandesh/sandesh_trace.h>" << endl << endl;
#endif
f_consts_impl <<
"#include \"" << get_include_prefix(*get_program()) << program_name_ <<
"_constants.h\"" << endl <<
endl <<
ns_open_ << endl <<
endl;
f_consts <<
"class " << program_name_ << "Constants {" << endl <<
" public:" << endl <<
" " << program_name_ << "Constants();" << endl <<
endl;
indent_up();
vector<t_const*>::iterator c_iter;
for (c_iter = consts.begin(); c_iter != consts.end(); ++c_iter) {
string name = (*c_iter)->get_name();
t_type* type = (*c_iter)->get_type();
f_consts <<
indent() << type_name(type) << " " << name << ";" << endl;
}
indent_down();
f_consts <<
"};" << endl;
f_consts_impl <<
"const " << program_name_ << "Constants g_" << program_name_ << "_constants;" << endl <<
endl <<
program_name_ << "Constants::" << program_name_ << "Constants() {" << endl;
indent_up();
for (c_iter = consts.begin(); c_iter != consts.end(); ++c_iter) {
print_const_value(f_consts_impl,
(*c_iter)->get_name(),
(*c_iter)->get_type(),
(*c_iter)->get_value());
}
indent_down();
indent(f_consts_impl) <<
"}" << endl;
f_consts <<
endl <<
"extern const " << program_name_ << "Constants g_" << program_name_ << "_constants;" << endl <<
endl <<
ns_close_ << endl <<
endl <<
"#endif" << endl;
f_consts.close();
f_consts_impl <<
endl <<
ns_close_ << endl <<
endl;
}
/**
* Prints the value of a constant with the given type. Note that type checking
* is NOT performed in this function as it is always run beforehand using the
* validate_types method in main.cc
*/
void t_cpp_generator::print_const_value(ofstream& out, string name, t_type* type, t_const_value* value) {
type = get_true_type(type);
if (type->is_base_type()) {
string v2 = render_const_value(out, name, type, value);
indent(out) << name << " = " << v2 << ";" << endl <<
endl;
} else if (type->is_enum()) {
indent(out) << name << " = (" << type_name(type) << ")" << value->get_integer() << ";" << endl <<
endl;
} else if (type->is_struct() || type->is_xception()) {
const vector<t_field*>& fields = ((t_struct*)type)->get_members();
vector<t_field*>::const_iterator f_iter;
const map<t_const_value*, t_const_value*>& val = value->get_map();
map<t_const_value*, t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
t_type* field_type = NULL;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if ((*f_iter)->get_name() == v_iter->first->get_string()) {
field_type = (*f_iter)->get_type();
}
}
if (field_type == NULL) {
throw "type error: " + type->get_name() + " has no field " + v_iter->first->get_string();
}
string val = render_const_value(out, name, field_type, v_iter->second);
indent(out) << name << "." << v_iter->first->get_string() << " = " << val << ";" << endl;
indent(out) << name << ".__isset." << v_iter->first->get_string() << " = true;" << endl;
}
out << endl;
} else if (type->is_map()) {
t_type* ktype = ((t_map*)type)->get_key_type();
t_type* vtype = ((t_map*)type)->get_val_type();
const map<t_const_value*, t_const_value*>& val = value->get_map();
map<t_const_value*, t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string key = render_const_value(out, name, ktype, v_iter->first);
string val = render_const_value(out, name, vtype, v_iter->second);
indent(out) << name << ".insert(std::make_pair(" << key << ", " << val << "));" << endl;
}
out << endl;
} else if (type->is_list()) {
t_type* etype = ((t_list*)type)->get_elem_type();
const vector<t_const_value*>& val = value->get_list();
vector<t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string val = render_const_value(out, name, etype, *v_iter);
indent(out) << name << ".push_back(" << val << ");" << endl;
}
out << endl;
} else if (type->is_set()) {
t_type* etype = ((t_set*)type)->get_elem_type();
const vector<t_const_value*>& val = value->get_list();
vector<t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string val = render_const_value(out, name, etype, *v_iter);
indent(out) << name << ".insert(" << val << ");" << endl;
}
out << endl;
} else {
throw "INVALID TYPE IN print_const_value: " + type->get_name();
}
}
/**
*
*/
string t_cpp_generator::render_const_value(ofstream& out, string name, t_type* type, t_const_value* value) {
(void) name;
std::ostringstream render;
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_STRING:
#ifdef SANDESH
case t_base_type::TYPE_STATIC_CONST_STRING:
case t_base_type::TYPE_XML:
#endif
render << '"' << get_escaped_string(value) << '"';
break;
case t_base_type::TYPE_BOOL:
render << ((value->get_integer() > 0) ? "true" : "false");
break;
case t_base_type::TYPE_BYTE:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
#ifdef SANDESH
case t_base_type::TYPE_U16:
case t_base_type::TYPE_U32:
#endif
render << value->get_integer();
break;
case t_base_type::TYPE_I64:
render << value->get_integer() << "LL";
break;
#ifdef SANDESH
case t_base_type::TYPE_U64:
render << value->get_integer() << "ULL";
break;
case t_base_type::TYPE_UUID:
render << "boost::uuids::string_generator()(\"" << value->get_uuid() << "\")";
break;
#endif
case t_base_type::TYPE_DOUBLE:
if (value->get_type() == t_const_value::CV_INTEGER) {
render << value->get_integer();
} else {
render << value->get_double();
}
break;
#ifdef SANDESH
case t_base_type::TYPE_IPV4:
render << value->get_integer();
break;
case t_base_type::TYPE_IPADDR:
render << "boost::asio::ip::address::from_string(\"" <<
value->get_string() << "\")";
break;
#endif
default:
throw "compiler error: no const of base type " + t_base_type::t_base_name(tbase);
}
} else if (type->is_enum()) {
render << "(" << type_name(type) << ")" << value->get_integer();
} else {
string t = tmp("tmp");
indent(out) << type_name(type) << " " << t << ";" << endl;
print_const_value(out, t, type, value);
render << t;
}
return render.str();
}
/**
* Generates a struct definition for a thrift data type. This is a class
* with data members and a read/write() function, plus a mirroring isset
* inner class.
*
* @param tstruct The struct definition
*/
void t_cpp_generator::generate_cpp_struct(t_struct* tstruct, bool is_exception) {
generate_struct_definition(f_types_, tstruct, is_exception);
generate_struct_fingerprint(f_types_impl_, tstruct, true);
generate_local_reflection(f_types_, tstruct, false);
generate_local_reflection(f_types_impl_, tstruct, true);
generate_local_reflection_pointer(f_types_impl_, tstruct);
#ifdef SANDESH
generate_static_const_string_definition(f_types_impl_, tstruct);
#endif
std::ofstream& out = (gen_templates_ ? f_types_tcc_ : f_types_impl_);
generate_struct_reader(out, tstruct);
generate_struct_writer(out, tstruct);
#ifdef SANDESH
generate_struct_logger(out, tstruct->get_name(), tstruct->get_members());
generate_struct_get_size(out, tstruct->get_name(), tstruct->get_members());
#endif
}
#ifdef SANDESH
/**
* Generates a sandesh definition for a thrift data type. This is a class
* with data members and a read/write() function, plus a mirroring isset
* inner class.
*
* @param tsandesh The sandesh definition
*/
void t_cpp_generator::generate_cpp_sandesh(t_sandesh* tsandesh) {
bool is_request =
((t_base_type *)tsandesh->get_type())->is_sandesh_request();
bool is_trace =
((t_base_type *)tsandesh->get_type())->is_sandesh_trace() ||
((t_base_type *)tsandesh->get_type())->is_sandesh_trace_object();