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// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "winapi-common" project.
// For details, see https://github.com/egor-tensin/winapi-common.
// Distributed under the MIT License.
#include <winapi/cmd_line.hpp>
#include <winapi/error.hpp>
#include <winapi/utf8.hpp>
#include <winapi/utils.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/config.hpp>
// clang-format off
#include <windows.h>
#include <shellapi.h>
// clang-format on
#include <cstddef>
#include <memory>
#include <stdexcept>
#include <string>
#include <sstream>
#include <utility>
#include <vector>
namespace winapi {
namespace {
std::vector<std::string> narrow_all(int argc, wchar_t** argv) {
std::vector<std::string> utf;
utf.reserve(argc);
for (int i = 0; i < argc; ++i)
utf.emplace_back(narrow(argv[i]));
return utf;
}
CommandLine do_parse(std::wstring src) {
boost::trim(src);
if (src.empty()) {
throw std::runtime_error{"Command line cannot be an empty string"};
}
int argc = 0;
std::unique_ptr<wchar_t*, LocalDelete> argv{::CommandLineToArgvW(src.c_str(), &argc)};
if (argv.get() == NULL) {
throw error::windows(GetLastError(), "CommandLineToArgvW");
}
if (argc == 0) {
throw std::runtime_error{"Command line must contain at least one token"};
}
return CommandLine{narrow_all(argc, argv.get())};
}
std::string split_argv0(std::vector<std::string>& argv) {
if (argv.empty()) {
throw std::range_error{"argv must contain at least one element"};
}
const auto argv0 = argv[0];
argv.erase(argv.begin());
return argv0;
}
std::vector<std::string> escape_all(const std::vector<std::string>& xs) {
std::vector<std::string> escaped;
escaped.reserve(xs.size());
for (const auto& x : xs)
escaped.emplace_back(CommandLine::escape(x));
return escaped;
}
} // namespace
CommandLine CommandLine::query() {
return do_parse(::GetCommandLineW());
}
CommandLine CommandLine::parse(const std::string& src) {
return do_parse(widen(src));
}
CommandLine CommandLine::from_main(int argc, wchar_t* argv[]) {
if (argc < 1)
throw std::range_error{"argc must be a positive number"};
return CommandLine{narrow_all(argc, argv)};
}
CommandLine::CommandLine(const std::vector<std::string>& argv) : m_args(argv) {
m_argv0 = split_argv0(m_args);
}
CommandLine::CommandLine(std::vector<std::string>&& argv) : m_args(std::move(argv)) {
m_argv0 = split_argv0(m_args);
}
std::string CommandLine::escape(const std::string& arg) {
std::ostringstream safe;
safe << '"';
for (auto it = arg.cbegin(); it != arg.cend(); ++it) {
std::size_t numof_backslashes = 0;
for (; it != arg.cend() && *it == '\\'; ++it)
++numof_backslashes;
if (it == arg.cend()) {
safe << std::string(2 * numof_backslashes, '\\');
break;
}
switch (*it) {
case L'"':
safe << std::string(2 * numof_backslashes + 1, '\\');
break;
default:
safe << std::string(numof_backslashes, '\\');
break;
}
safe << *it;
}
safe << '"';
return safe.str();
}
std::string CommandLine::escape_cmd(const std::string& arg) {
BOOST_STATIC_CONSTEXPR auto escape_symbol = '^';
static const std::string dangerous_symbols{"^!\"%&()<>|"};
auto safe = escape(arg);
for (const auto danger : dangerous_symbols) {
std::ostringstream replacement;
replacement << escape_symbol << danger;
boost::replace_all(safe, std::string{danger}, replacement.str());
}
return safe;
}
std::string CommandLine::to_string() const {
return boost::algorithm::join(escape_argv(), std::string{token_sep()});
}
std::string CommandLine::args_to_string() const {
return boost::algorithm::join(escape_args(), std::string{token_sep()});
}
std::vector<std::string> CommandLine::get_argv() const {
auto argv = get_args();
argv.emplace(argv.begin(), get_argv0());
return argv;
}
std::vector<std::string> CommandLine::escape_args() const {
return escape_all(get_args());
}
std::vector<std::string> CommandLine::escape_argv() const {
return escape_all(get_argv());
}
} // namespace winapi
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