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// SPDX-License-Identifier: GPL-3.0-or-later
#include "TargetDescriptionGenerator.h"
#include "rcc/Support/TextDiagnostic.h"
#include <filesystem>
#include <fstream>
#include <iostream>
#include <iterator>
#include <string>
#include <string_view>
namespace {
struct CommandLine final {
std::string InputPath;
std::string RegisterHeaderPath;
std::string InstructionHeaderPath;
std::string TablesPath;
};
[[nodiscard]] bool parseCommandLine(int ArgumentCount, char *Arguments[], CommandLine &Result) {
for (int Index = 1; Index < ArgumentCount; ++Index) {
const std::string_view Argument(Arguments[Index]);
if (Argument == "--input" || Argument == "--register-header" ||
Argument == "--instruction-header" || Argument == "--tables") {
if (Index + 1 >= ArgumentCount) {
std::cerr << "rcc-backend-descgen: missing value for " << Argument << '\n';
return false;
}
std::string *Destination = nullptr;
if (Argument == "--input")
Destination = &Result.InputPath;
else if (Argument == "--register-header")
Destination = &Result.RegisterHeaderPath;
else if (Argument == "--instruction-header")
Destination = &Result.InstructionHeaderPath;
else
Destination = &Result.TablesPath;
*Destination = Arguments[++Index];
continue;
}
std::cerr << "rcc-backend-descgen: unknown argument '" << Argument << "'\n";
return false;
}
if (!Result.InputPath.empty() && !Result.RegisterHeaderPath.empty() &&
!Result.InstructionHeaderPath.empty() && !Result.TablesPath.empty()) {
return true;
}
std::cerr << "usage: rcc-backend-descgen --input <file> --register-header <file> "
"--instruction-header <file> --tables <file>\n";
return false;
}
[[nodiscard]] bool writeFile(const std::filesystem::path &Path, std::string_view Contents) {
std::error_code Error;
std::filesystem::create_directories(Path.parent_path(), Error);
if (Error) {
std::cerr << "rcc-backend-descgen: cannot create output directory for '" << Path.string()
<< "': " << Error.message() << '\n';
return false;
}
std::ofstream Output(Path, std::ios::binary | std::ios::trunc);
if (!Output) {
std::cerr << "rcc-backend-descgen: cannot open output '" << Path.string() << "'\n";
return false;
}
Output.write(Contents.data(), static_cast<std::streamsize>(Contents.size()));
if (Output) {
Output.close();
return true;
}
std::cerr << "rcc-backend-descgen: cannot write output '" << Path.string() << "'\n";
return false;
}
} // namespace
int main(int ArgumentCount, char *Arguments[]) {
CommandLine Command;
if (!parseCommandLine(ArgumentCount, Arguments, Command))
return 1;
std::ifstream Input(Command.InputPath, std::ios::binary);
if (!Input) {
std::cerr << "rcc-backend-descgen: cannot open input '" << Command.InputPath << "'\n";
return 1;
}
const std::string SourceText{std::istreambuf_iterator<char>(Input),
std::istreambuf_iterator<char>()};
const rcc::targetgen::DescriptionGenerationResult Result =
rcc::targetgen::generateDescription(Command.InputPath, SourceText);
if (!Result.succeeded()) {
const rcc::TextSource Source(Command.InputPath, SourceText);
for (const rcc::TextDiagnostic &Diagnostic : Result.Diagnostics)
std::cerr << rcc::formatTextDiagnostic(Diagnostic, Source) << '\n';
return 1;
}
return writeFile(Command.RegisterHeaderPath, Result.Output->RegisterHeader) &&
writeFile(Command.InstructionHeaderPath, Result.Output->InstructionHeader) &&
writeFile(Command.TablesPath, Result.Output->TargetTables)
? 0
: 1;
}
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