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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. 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 <enco/Frontend.h>
#include <enco/Backend.h>
#include <cmdline/View.h>
#include <string>
#include <vector>
#include <functional>
namespace cmdline
{
// TODO Extract this helper class
class Vector : public cmdline::View
{
public:
uint32_t size(void) const { return _args.size(); }
public:
const char *at(uint32_t nth) const { return _args.at(nth).c_str(); }
public:
Vector &append(const std::string &arg)
{
_args.emplace_back(arg);
return (*this);
}
private:
std::vector<std::string> _args;
};
} // namespace cmdline
namespace
{
class Zone
{
public:
Zone() = default;
public:
const cmdline::View *args(void) const { return &_args; }
public:
void append(const std::string &arg) { _args.append(arg); }
private:
cmdline::Vector _args;
};
} // namespace
#include <dlfcn.h>
namespace
{
class FrontendFactory
{
public:
FrontendFactory(const std::string &path)
{
_handle = dlopen(path.c_str(), RTLD_LAZY);
assert(_handle != nullptr);
}
public:
// Copy is not allowed to avoid double close
FrontendFactory(const FrontendFactory &) = delete;
FrontendFactory(FrontendFactory &&) = delete;
public:
~FrontendFactory() { dlclose(_handle); }
private:
using Entry = std::unique_ptr<enco::Frontend> (*)(const cmdline::View &);
private:
Entry entry(void) const
{
auto entry = reinterpret_cast<Entry>(dlsym(_handle, "make_frontend"));
assert(entry != nullptr);
return entry;
}
public:
std::unique_ptr<enco::Frontend> make(const cmdline::View *args) const
{
auto fn = entry();
return fn(*args);
}
private:
void *_handle;
};
} // namespace
namespace
{
class FrontendZone : public Zone
{
public:
FrontendZone(const std::string &path) : _factory{path}
{
// DO NOTHING
}
public:
const FrontendFactory *factory(void) const { return &_factory; }
private:
FrontendFactory _factory;
};
} // namespace
#include <stdex/Memory.h>
#include <map>
#include <iostream>
#include <stdexcept>
static int entry(int argc, char **argv)
{
// Usage:
// [Command] --frontend [Frontend .so path] --frontend-arg ...
std::unique_ptr<FrontendZone> frontend_zone;
cmdline::Vector backend_args;
// Simple argument parser (based on map)
std::map<std::string, std::function<void(const std::string &arg)>> argparse;
argparse["--frontend"] = [&](const std::string &path) {
frontend_zone = stdex::make_unique<FrontendZone>(path);
};
argparse["--frontend-arg"] = [&](const std::string &arg) { frontend_zone->append(arg); };
argparse["--backend-arg"] = [&](const std::string &arg) { backend_args.append(arg); };
if (argc < 2)
{
std::cerr << "Usage:" << std::endl;
std::cerr << "[Command] --frontend [.so path]" << std::endl;
std::cerr << " --frontend-arg [argument] ..." << std::endl;
std::cerr << " --backend-arg [argument] ..." << std::endl;
return 255;
}
for (int n = 1; n < argc; n += 2)
{
const std::string tag{argv[n]};
const std::string arg{argv[n + 1]};
auto it = argparse.find(tag);
if (it == argparse.end())
{
std::cerr << "Option '" << tag << "' is not supported" << std::endl;
return 255;
}
it->second(arg);
}
assert(frontend_zone != nullptr);
auto frontend = frontend_zone->factory()->make(frontend_zone->args());
auto bundle = frontend->load();
auto backend = make_backend(backend_args);
backend->compile(bundle.module(), bundle.data());
return 0;
}
#ifdef NDEBUG
int main(int argc, char **argv)
{
try
{
return entry(argc, argv);
}
catch (const std::exception &e)
{
std::cerr << "ERROR: " << e.what() << std::endl;
}
return 255;
}
#else // NDEBUG
int main(int argc, char **argv)
{
// NOTE main does not catch internal exceptions for debug build to make it easy to
// check the stacktrace with a debugger
return entry(argc, argv);
}
#endif // !NDEBUG
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