99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
/*
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* Copyright 2016 - 2025 Gary Talent (gary@drinkingtea.net). All rights reserved.
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*/
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module;
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#include <ox/std/string.hpp>
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export module hull;
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namespace hull {
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export
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template<typename Str = ox::String, size_t SmallVecSz = 0>
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constexpr ox::Result<ox::Vector<Str, SmallVecSz>> parseCmd(ox::StringViewCR cmd) noexcept
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requires(ox::is_same_v<Str, ox::String> || ox::is_same_v<Str, ox::StringView>) {
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auto const tokens = split(cmd, ' ');
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ox::Vector<Str, SmallVecSz> args;
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char waitingFor{};
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auto const handleString = [&waitingFor, &args](
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ox::StringViewCR token,
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char const delimiter) {
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if (endsWith(token, delimiter)) {
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args.emplace_back(substr(token, 1, token.size() - 1));
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} else {
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waitingFor = delimiter;
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args.emplace_back(substr(token, 1));
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}
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};
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for (auto const &token : tokens) {
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if (waitingFor) {
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if (endsWith(token, waitingFor)) {
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waitingFor = 0;
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}
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auto &tgt = *args.back().value;
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if constexpr (ox::is_same_v<Str, ox::String>) {
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tgt += substr(token, 0, token.size() - 1);
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} else {
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tgt = {tgt.data(), tgt.size() + token.size() - 1};
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}
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} else if (beginsWith(token, '"')) {
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handleString(token, '"');
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} else if (beginsWith(token, '\'')) {
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handleString(token, '\'');
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} else {
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args.emplace_back(token);
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}
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}
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if (waitingFor) {
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return ox::Error{1, "unterminated string"};
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}
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return args;
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}
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template<typename Str = ox::String>
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[[nodiscard]]
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static constexpr bool testParse(ox::StringViewCR cmd, std::initializer_list<ox::StringView> const &expected) noexcept {
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auto const [args, err] = parseCmd<Str>(cmd);
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static constexpr auto equals = [](auto const &a, auto const &b) {
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if (a.size() != b.size()) {
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return false;
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}
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for (auto i = 0u; i < a.size(); ++i) {
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if (a[i] != b[i]) {
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return false;
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}
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}
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return true;
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};
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return !err && equals(args, ox::Vector(expected));
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}
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static_assert(testParse("echo asdf", {"echo", "asdf"}));
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static_assert(testParse<ox::String>("echo asdf", {"echo", "asdf"}));
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static_assert(testParse("echo \"asdf\"", {"echo", "asdf"}));
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static_assert(testParse<ox::String>("echo \"asdf\"", {"echo", "asdf"}));
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static_assert(testParse("echo 'asdf'", {"echo", "asdf"}));
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static_assert(testParse<ox::String>("echo 'asdf'", {"echo", "asdf"}));
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static_assert(testParse("echo 'asdf' aoue", {"echo", "asdf", "aoue"}));
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static_assert(testParse<ox::String>("echo 'asdf' aoue", {"echo", "asdf", "aoue"}));
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export class Prompt {
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private:
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ox::String m_cmd;
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ox::String m_workingDir{"/"};
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ox::Vector<ox::String> m_prevCmds;
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public:
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private:
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};
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}
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