mirror of
https://github.com/LadybirdBrowser/ladybird.git
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ArgsParser: Style fixup
Remove tabs, make whitespace lines a little more in fitting with the rest of the codebase.
This commit is contained in:
Robin Burchell
Andreas Kling
parent
3ec625067a
commit
5cad215919
Notes:
sideshowbarker
2024-07-19 14:04:46 +09:00
Author: https://github.com/rburchell Commit: https://github.com/SerenityOS/serenity/commit/5cad215919b Pull-request: https://github.com/SerenityOS/serenity/pull/50
@ -5,171 +5,177 @@
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namespace AK {
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bool ArgsParserResult::is_present(const String& arg_name) const
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{
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return m_args.contains(arg_name);
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}
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String ArgsParserResult::get(const String& arg_name) const
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{
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return m_args.get(arg_name);
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}
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const Vector<String>& ArgsParserResult::get_single_values() const
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{
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return m_single_values;
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}
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ArgsParser::Arg::Arg(const String& name, const String& description, bool required)
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: name(name), description(description), required(required) {}
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ArgsParser::Arg::Arg(const String& name, const String& value_name, const String& description, bool required)
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: name(name), description(description), value_name(value_name), required(required) {}
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ArgsParser::ArgsParser(const String& program_name, const String& prefix)
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: m_program_name(program_name), m_prefix(prefix) {}
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ArgsParserResult ArgsParser::parse(const int argc, const char** argv)
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{
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ArgsParserResult res;
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// We should have at least one parameter
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if (argc < 2)
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return {};
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// We parse the first parameter at the index 1
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if (parse_next_param(1, argv, argc - 1, res) != 0)
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return {};
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if (!check_required_args(res))
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return {};
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return res;
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}
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int ArgsParser::parse_next_param(const int index, const char** argv, const int params_left, ArgsParserResult& res)
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{
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if (params_left == 0)
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return 0;
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String param = argv[index];
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// We check if the prefix is found at the beginning of the param name
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if (is_param_valid(param)) {
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auto prefix_length = m_prefix.length();
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String param_name = param.substring(prefix_length, param.length() - prefix_length);
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auto arg = m_args.find(param_name);
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if (arg == m_args.end()) {
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printf("Unknown arg \"");
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if (!param_name.is_null())
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printf("%s", param_name.characters());
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printf("\"\n");
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return -1;
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}
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// If this parameter must be followed by a value, we look for it
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if (!arg->value.value_name.is_null()) {
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if (params_left < 1) {
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printf("Missing value for argument %s\n", arg->value.name.characters());
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return -1;
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}
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String next = String(argv[index + 1]);
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if (is_param_valid(next)) {
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printf("Missing value for argument %s\n", arg->value.name.characters());
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return -1;
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}
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res.m_args.set(arg->value.name, next);
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return parse_next_param(index + 2, argv, params_left - 2, res);
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}
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// Single argument, not followed by a value
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res.m_args.set(arg->value.name, "");
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return parse_next_param(index + 1, argv, params_left - 1, res);
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}
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// Else, it's a value alone, a file name parameter for example
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res.m_single_values.append(param);
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return parse_next_param(index + 1, argv, params_left - 1, res);
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}
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bool ArgsParser::is_param_valid(const String& param_name)
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{
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return param_name.substring(0, m_prefix.length()) == m_prefix;
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}
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bool ArgsParser::check_required_args(const ArgsParserResult& res)
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{
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for (auto& it : m_args) {
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if (it.value.required) {
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if (!res.is_present(it.value.name))
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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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void ArgsParser::add_arg(const String& name, const String& description, bool required)
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{
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m_args.set(name, Arg(name, description, required));
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}
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void ArgsParser::add_arg(const String& name, const String& value_name, const String& description, bool required)
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{
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m_args.set(name, Arg(name, value_name, description, required));
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}
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String ArgsParser::get_usage() const
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{
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StringBuilder sb;
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sb.append("usage : ");
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sb.append(m_program_name);
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sb.append(" ");
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for (auto& it : m_args) {
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if (it.value.required)
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sb.append("<");
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else
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sb.append("[");
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sb.append(m_prefix);
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sb.append(it.value.name);
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if (!it.value.value_name.is_null()) {
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sb.append(" ");
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sb.append(it.value.value_name);
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}
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if (it.value.required)
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sb.append("> ");
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else
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sb.append("] ");
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}
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sb.append("\n");
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for (auto& it : m_args) {
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sb.append(" ");
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sb.append(m_prefix);
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sb.append(it.value.name);
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if (!it.value.value_name.is_null()) {
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sb.append(" ");
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sb.append(it.value.value_name);
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}
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sb.append(" : ");
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sb.append(it.value.description);
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sb.append("\n");
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}
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return sb.to_string();
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}
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void ArgsParser::print_usage() const
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{
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printf("%s\n", get_usage().characters());
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}
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bool ArgsParserResult::is_present(const String& arg_name) const
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{
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return m_args.contains(arg_name);
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}
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String ArgsParserResult::get(const String& arg_name) const
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{
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return m_args.get(arg_name);
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}
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const Vector<String>& ArgsParserResult::get_single_values() const
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{
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return m_single_values;
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}
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ArgsParser::Arg::Arg(const String& name, const String& description, bool required)
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: name(name), description(description), required(required)
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{}
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ArgsParser::Arg::Arg(const String& name, const String& value_name, const String& description, bool required)
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: name(name), description(description), value_name(value_name), required(required)
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{}
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ArgsParser::ArgsParser(const String& program_name, const String& prefix)
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: m_program_name(program_name), m_prefix(prefix)
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{}
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ArgsParserResult ArgsParser::parse(const int argc, const char** argv)
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{
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ArgsParserResult res;
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// We should have at least one parameter
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if (argc < 2)
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return {};
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// We parse the first parameter at the index 1
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if (parse_next_param(1, argv, argc - 1, res) != 0)
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return {};
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if (!check_required_args(res))
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return {};
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return res;
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}
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int ArgsParser::parse_next_param(const int index, const char** argv, const int params_left, ArgsParserResult& res)
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{
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if (params_left == 0)
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return 0;
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String param = argv[index];
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// We check if the prefix is found at the beginning of the param name
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if (is_param_valid(param)) {
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auto prefix_length = m_prefix.length();
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String param_name = param.substring(prefix_length, param.length() - prefix_length);
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auto arg = m_args.find(param_name);
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if (arg == m_args.end()) {
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printf("Unknown arg \"");
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if (!param_name.is_null())
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printf("%s", param_name.characters());
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printf("\"\n");
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return -1;
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}
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// If this parameter must be followed by a value, we look for it
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if (!arg->value.value_name.is_null()) {
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if (params_left < 1) {
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printf("Missing value for argument %s\n", arg->value.name.characters());
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return -1;
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}
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String next = String(argv[index + 1]);
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if (is_param_valid(next)) {
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printf("Missing value for argument %s\n", arg->value.name.characters());
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return -1;
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}
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res.m_args.set(arg->value.name, next);
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return parse_next_param(index + 2, argv, params_left - 2, res);
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}
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// Single argument, not followed by a value
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res.m_args.set(arg->value.name, "");
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return parse_next_param(index + 1, argv, params_left - 1, res);
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}
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// Else, it's a value alone, a file name parameter for example
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res.m_single_values.append(param);
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return parse_next_param(index + 1, argv, params_left - 1, res);
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}
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bool ArgsParser::is_param_valid(const String& param_name)
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{
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return param_name.substring(0, m_prefix.length()) == m_prefix;
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}
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bool ArgsParser::check_required_args(const ArgsParserResult& res)
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{
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for (auto& it : m_args) {
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if (it.value.required) {
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if (!res.is_present(it.value.name))
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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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void ArgsParser::add_arg(const String& name, const String& description, bool required)
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{
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m_args.set(name, Arg(name, description, required));
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}
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void ArgsParser::add_arg(const String& name, const String& value_name, const String& description, bool required)
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{
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m_args.set(name, Arg(name, value_name, description, required));
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}
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String ArgsParser::get_usage() const
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{
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StringBuilder sb;
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sb.append("usage : ");
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sb.append(m_program_name);
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sb.append(" ");
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for (auto& it : m_args) {
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if (it.value.required)
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sb.append("<");
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else
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sb.append("[");
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sb.append(m_prefix);
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sb.append(it.value.name);
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if (!it.value.value_name.is_null()) {
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sb.append(" ");
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sb.append(it.value.value_name);
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}
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if (it.value.required)
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sb.append("> ");
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else
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sb.append("] ");
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}
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sb.append("\n");
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for (auto& it : m_args) {
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sb.append(" ");
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sb.append(m_prefix);
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sb.append(it.value.name);
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if (!it.value.value_name.is_null()) {
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sb.append(" ");
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sb.append(it.value.value_name);
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}
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sb.append(" : ");
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sb.append(it.value.description);
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sb.append("\n");
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}
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return sb.to_string();
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}
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void ArgsParser::print_usage() const
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{
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printf("%s\n", get_usage().characters());
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}
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}
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@ -14,48 +14,50 @@
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*/
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namespace AK {
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class ArgsParserResult {
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public:
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bool is_present(const String& arg_name) const;
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String get(const String& arg_name) const;
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const Vector<String>& get_single_values() const;
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private:
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HashMap<String, String> m_args;
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Vector<String> m_single_values;
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class ArgsParserResult {
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public:
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bool is_present(const String& arg_name) const;
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String get(const String& arg_name) const;
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const Vector<String>& get_single_values() const;
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friend class ArgsParser;
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private:
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HashMap<String, String> m_args;
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Vector<String> m_single_values;
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friend class ArgsParser;
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};
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class ArgsParser {
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public:
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ArgsParser(const String& program_name, const String& prefix);
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ArgsParserResult parse(const int argc, const char** argv);
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void add_arg(const String& name, const String& description, bool required);
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void add_arg(const String& name, const String& value_name, const String& description, bool required);
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String get_usage() const;
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void print_usage() const;
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private:
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struct Arg {
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inline Arg() {}
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Arg(const String& name, const String& description, bool required);
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Arg(const String& name, const String& value_name, const String& description, bool required);
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String name;
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String description;
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String value_name;
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bool required;
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};
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class ArgsParser {
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public:
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ArgsParser(const String& program_name, const String& prefix);
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int parse_next_param(const int index, const char** argv, const int params_left, ArgsParserResult& res);
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bool is_param_valid(const String& param_name);
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bool check_required_args(const ArgsParserResult& res);
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ArgsParserResult parse(const int argc, const char** argv);
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String m_program_name;
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String m_prefix;
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HashMap<String, Arg> m_args;
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};
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void add_arg(const String& name, const String& description, bool required);
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void add_arg(const String& name, const String& value_name, const String& description, bool required);
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String get_usage() const;
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void print_usage() const;
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private:
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struct Arg {
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inline Arg() {}
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Arg(const String& name, const String& description, bool required);
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Arg(const String& name, const String& value_name, const String& description, bool required);
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String name;
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String description;
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String value_name;
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bool required;
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};
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int parse_next_param(const int index, const char** argv, const int params_left, ArgsParserResult& res);
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bool is_param_valid(const String& param_name);
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bool check_required_args(const ArgsParserResult& res);
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String m_program_name;
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String m_prefix;
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HashMap<String, Arg> m_args;
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};
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}
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