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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 <frameworks/base/core/proto/android/os/incident.pb.h>
#include <map>
#include <string>
using namespace android;
using namespace android::os;
using namespace google::protobuf;
using namespace google::protobuf::io;
using namespace google::protobuf::internal;
using namespace std;
static inline void emptyline() {
printf("\n");
}
static void generateHead(const char* header) {
printf("// Auto generated file. Do not modify\n");
emptyline();
printf("#include \"%s.h\"\n", header);
emptyline();
}
// ================================================================================
static bool generateIncidentSectionsCpp(Descriptor const* descriptor)
{
generateHead("incident_sections");
map<string,FieldDescriptor const*> sections;
int N;
N = descriptor->field_count();
for (int i=0; i<N; i++) {
const FieldDescriptor* field = descriptor->field(i);
if (field->type() == FieldDescriptor::TYPE_MESSAGE) {
sections[field->name()] = field;
}
}
printf("IncidentSection const INCIDENT_SECTIONS[] = {\n");
N = sections.size();
int i = 0;
for (map<string,FieldDescriptor const*>::const_iterator it = sections.begin();
it != sections.end(); it++, i++) {
const FieldDescriptor* field = it->second;
printf(" { %d, \"%s\" }", field->number(), field->name().c_str());
if (i != N-1) {
printf(",\n");
} else {
printf("\n");
}
}
printf("};\n");
printf("const int INCIDENT_SECTION_COUNT = %d;\n", N);
return true;
}
// ================================================================================
static void splitAndPrint(const string& args) {
size_t base = 0;
size_t found;
while (true) {
found = args.find_first_of(" ", base);
if (found != base) {
string arg = args.substr(base, found - base);
printf(" \"%s\",", arg.c_str());
}
if (found == args.npos) break;
base = found + 1;
}
}
static const std::string replaceAll(const string& field_name, const char oldC, const string& newS) {
if (field_name.find_first_of(oldC) == field_name.npos) return field_name.c_str();
size_t pos = 0, idx = 0;
char* res = new char[field_name.size() * newS.size() + 1]; // assign a larger buffer
while (pos != field_name.size()) {
char cur = field_name[pos++];
if (cur != oldC) {
res[idx++] = cur;
continue;
}
for (size_t i=0; i<newS.size(); i++) {
res[idx++] = newS[i];
}
}
res[idx] = '\0';
std::string result(res);
delete [] res;
return result;
}
static inline bool isDefaultDest(const FieldDescriptor* field) {
return field->options().GetExtension(privacy).dest() == PrivacyFlags::default_instance().dest();
}
// Returns true if the descriptor doesn't have any non default privacy flags set, including its submessages
static bool generatePrivacyFlags(const Descriptor* descriptor, const char* alias, map<string, bool> &msgNames) {
bool hasDefaultFlags[descriptor->field_count()];
// iterate though its field and generate sub flags first
for (int i=0; i<descriptor->field_count(); i++) {
hasDefaultFlags[i] = true; // set default to true
const FieldDescriptor* field = descriptor->field(i);
const std::string field_name_str = replaceAll(field->full_name(), '.', "__");
const char* field_name = field_name_str.c_str();
// check if the same name is already defined
if (msgNames.find(field_name) != msgNames.end()) {
hasDefaultFlags[i] = msgNames[field_name];
continue;
};
PrivacyFlags p = field->options().GetExtension(privacy);
switch (field->type()) {
case FieldDescriptor::TYPE_MESSAGE:
if (generatePrivacyFlags(field->message_type(), field_name, msgNames) &&
isDefaultDest(field)) break;
printf("Privacy %s(%d, %s_LIST);\n", field_name, field->number(), field_name);
hasDefaultFlags[i] = false;
break;
case FieldDescriptor::TYPE_STRING:
if (isDefaultDest(field) && p.patterns_size() == 0) break;
printf("const char* %s_patterns[] = {\n", field_name);
for (int i=0; i<p.patterns_size(); i++) {
// the generated string need to escape backslash as well, need to dup it here
printf(" \"%s\",\n", replaceAll(p.patterns(i), '\\', "\\\\").c_str());
}
printf(" NULL };\n");
printf("Privacy %s(%d, %d, %s_patterns);\n", field_name, field->number(), p.dest(), field_name);
hasDefaultFlags[i] = false;
break;
default:
if (isDefaultDest(field)) break;
printf("Privacy %s(%d, %d, %d);\n", field_name, field->number(), (int) field->type(), p.dest());
hasDefaultFlags[i] = false;
}
// add the field name to message map, true means it has default flags
msgNames[field_name] = hasDefaultFlags[i];
}
bool allDefaults = true;
for (int i=0; i<descriptor->field_count(); i++) {
allDefaults &= hasDefaultFlags[i];
}
if (allDefaults) return true;
emptyline();
printf("const Privacy* %s_LIST[] = {\n", alias);
for (int i=0; i<descriptor->field_count(); i++) {
const FieldDescriptor* field = descriptor->field(i);
if (hasDefaultFlags[i]) continue;
printf(" &%s,\n", replaceAll(field->full_name(), '.', "__").c_str());
}
printf(" NULL };\n");
emptyline();
return false;
}
static bool generateSectionListCpp(Descriptor const* descriptor) {
generateHead("section_list");
// generates SECTION_LIST
printf("const Section* SECTION_LIST[] = {\n");
for (int i=0; i<descriptor->field_count(); i++) {
const FieldDescriptor* field = descriptor->field(i);
if (field->type() != FieldDescriptor::TYPE_MESSAGE) {
continue;
}
const SectionFlags s = field->options().GetExtension(section);
switch (s.type()) {
case SECTION_NONE:
continue;
case SECTION_FILE:
printf(" new FileSection(%d, \"%s\"),\n", field->number(), s.args().c_str());
break;
case SECTION_COMMAND:
printf(" new CommandSection(%d,", field->number());
splitAndPrint(s.args());
printf(" NULL),\n");
break;
case SECTION_DUMPSYS:
printf(" new DumpsysSection(%d,", field->number());
splitAndPrint(s.args());
printf(" NULL),\n");
break;
}
}
printf(" NULL };\n");
emptyline();
// generates PRIVACY_POLICY
map<string, bool> messageNames;
if (generatePrivacyFlags(descriptor, "PRIVACY_POLICY", messageNames)) {
// if no privacy options set at all, define an empty list
printf("const Privacy* PRIVACY_POLICY_LIST[] = { NULL };\n");
}
return true;
}
// ================================================================================
int main(int argc, char const *argv[])
{
if (argc != 2) return 1;
const char* module = argv[1];
Descriptor const* descriptor = IncidentProto::descriptor();
if (strcmp(module, "incident") == 0) {
return !generateIncidentSectionsCpp(descriptor);
}
if (strcmp(module, "incidentd") == 0 ) {
return !generateSectionListCpp(descriptor);
}
// return failure if not called by the whitelisted modules
return 1;
}
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