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#include "Errors.h"
#include "stream_proto_utils.h"
#include "string_utils.h"
#include <frameworks/base/tools/streaming_proto/stream.pb.h>
#include <iomanip>
#include <iostream>
#include <sstream>
using namespace android::stream_proto;
using namespace google::protobuf::io;
using namespace std;
static string
make_filename(const FileDescriptorProto& file_descriptor)
{
return file_descriptor.name() + ".h";
}
static inline bool
should_generate_enums_mapping(const EnumDescriptorProto& enu)
{
return enu.options().GetExtension(stream_enum).enable_enums_mapping();
}
static void
write_enum(stringstream& text, const EnumDescriptorProto& enu, const string& indent)
{
const int N = enu.value_size();
text << indent << "// enum " << enu.name() << endl;
for (int i=0; i<N; i++) {
const EnumValueDescriptorProto& value = enu.value(i);
text << indent << "const int "
<< make_constant_name(value.name())
<< " = " << value.number() << ";" << endl;
}
if (should_generate_enums_mapping(enu)) {
string name = make_constant_name(enu.name());
string prefix = name + "_";
text << indent << "const int _ENUM_" << name << "_COUNT = " << N << ";" << endl;
text << indent << "const char* _ENUM_" << name << "_NAMES[" << N << "] = {" << endl;
for (int i=0; i<N; i++) {
text << indent << INDENT << "\"" << stripPrefix(enu.value(i).name(), prefix) << "\"," << endl;
}
text << indent << "};" << endl;
text << indent << "const int _ENUM_" << name << "_VALUES[" << N << "] = {" << endl;
for (int i=0; i<N; i++) {
text << indent << INDENT << make_constant_name(enu.value(i).name()) << "," << endl;
}
text << indent << "};" << endl;
}
text << endl;
}
static void
write_field(stringstream& text, const FieldDescriptorProto& field, const string& indent)
{
string optional_comment = field.label() == FieldDescriptorProto::LABEL_OPTIONAL
? "optional " : "";
string repeated_comment = field.label() == FieldDescriptorProto::LABEL_REPEATED
? "repeated " : "";
string proto_type = get_proto_type(field);
string packed_comment = field.options().packed()
? " [packed=true]" : "";
text << indent << "// " << optional_comment << repeated_comment << proto_type << ' '
<< field.name() << " = " << field.number() << packed_comment << ';' << endl;
text << indent << "const uint64_t " << make_constant_name(field.name()) << " = 0x";
ios::fmtflags fmt(text.flags());
text << setfill('0') << setw(16) << hex << get_field_id(field);
text.flags(fmt);
text << "LL;" << endl;
text << endl;
}
static inline bool
should_generate_fields_mapping(const DescriptorProto& message)
{
return message.options().GetExtension(stream_msg).enable_fields_mapping();
}
static inline bool
should_generate_fields_mapping_recursively(const DescriptorProto& message) {
return message.options().GetExtension(stream_msg).enable_fields_mapping_recursively();
}
static void
write_message(stringstream& text, const DescriptorProto& message, const string& indent, bool genMapping)
{
int N;
const string indented = indent + INDENT;
genMapping |= should_generate_fields_mapping_recursively(message);
text << indent << "// message " << message.name() << endl;
text << indent << "namespace " << message.name() << " {" << endl;
// Enums
N = message.enum_type_size();
for (int i=0; i<N; i++) {
write_enum(text, message.enum_type(i), indented);
}
// Nested classes
N = message.nested_type_size();
for (int i=0; i<N; i++) {
write_message(text, message.nested_type(i), indented, genMapping);
}
// Fields
N = message.field_size();
for (int i=0; i<N; i++) {
write_field(text, message.field(i), indented);
}
if (genMapping | should_generate_fields_mapping(message)) {
N = message.field_size();
text << indented << "const int _FIELD_COUNT = " << N << ";" << endl;
text << indented << "const char* _FIELD_NAMES[" << N << "] = {" << endl;
for (int i=0; i<N; i++) {
text << indented << INDENT << "\"" << message.field(i).name() << "\"," << endl;
}
text << indented << "};" << endl;
text << indented << "const uint64_t _FIELD_IDS[" << N << "] = {" << endl;
for (int i=0; i<N; i++) {
text << indented << INDENT << make_constant_name(message.field(i).name()) << "," << endl;
}
text << indented << "};" << endl << endl;
}
text << indent << "} //" << message.name() << endl;
text << endl;
}
static void
write_header_file(CodeGeneratorResponse* response, const FileDescriptorProto& file_descriptor)
{
stringstream text;
text << "// Generated by protoc-gen-cppstream. DO NOT MODIFY." << endl;
text << "// source: " << file_descriptor.name() << endl << endl;
string header = "ANDROID_" + replace_string(file_descriptor.name(), '/', '_');
header = replace_string(header, '.', '_') + "_stream_h";
header = make_constant_name(header);
text << "#ifndef " << header << endl;
text << "#define " << header << endl;
text << endl;
vector<string> namespaces = split(file_descriptor.package(), '.');
for (vector<string>::iterator it = namespaces.begin(); it != namespaces.end(); it++) {
text << "namespace " << *it << " {" << endl;
}
text << endl;
size_t N;
N = file_descriptor.enum_type_size();
for (size_t i=0; i<N; i++) {
write_enum(text, file_descriptor.enum_type(i), "");
}
N = file_descriptor.message_type_size();
for (size_t i=0; i<N; i++) {
write_message(text, file_descriptor.message_type(i), "", false);
}
for (vector<string>::iterator it = namespaces.begin(); it != namespaces.end(); it++) {
text << "} // " << *it << endl;
}
text << endl;
text << "#endif // " << header << endl;
CodeGeneratorResponse::File* file_response = response->add_file();
file_response->set_name(make_filename(file_descriptor));
file_response->set_content(text.str());
}
int main(int argc, char const *argv[])
{
(void)argc;
(void)argv;
GOOGLE_PROTOBUF_VERIFY_VERSION;
CodeGeneratorRequest request;
CodeGeneratorResponse response;
// Read the request
request.ParseFromIstream(&cin);
// Build the files we need.
const int N = request.proto_file_size();
for (int i=0; i<N; i++) {
const FileDescriptorProto& file_descriptor = request.proto_file(i);
if (should_generate_for_file(request, file_descriptor.name())) {
write_header_file(&response, file_descriptor);
}
}
// If we had errors, don't write the response. Print the errors and exit.
if (ERRORS.HasErrors()) {
ERRORS.Print();
return 1;
}
// If we didn't have errors, write the response and exit happily.
response.SerializeToOstream(&cout);
/* code */
return 0;
}
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