104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
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#include "parameters_parser.hh"
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namespace Kakoune
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{
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ParametersParser::ParametersParser(const ParameterList& params,
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std::unordered_map<String, bool> options)
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: m_params(params), m_positional(params.size(), true),
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m_options(std::move(options))
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{
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for (size_t i = 0; i < params.size(); ++i)
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{
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if (params[i][0] == '-')
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{
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auto it = m_options.find(params[i].substr(1_byte));
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if (it == m_options.end())
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throw unknown_option(params[i]);
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if (it->second)
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{
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if (i + 1 == params.size() or params[i+1][0] == '-')
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throw missing_option_value(params[i]);
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m_positional[i+1] = false;
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}
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m_positional[i] = false;
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}
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// all options following -- are positional
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if (params[i] == "--")
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break;
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}
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}
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bool ParametersParser::has_option(const String& name) const
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{
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assert(m_options.find(name) != m_options.end());
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for (auto& param : m_params)
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{
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if (param[0] == '-' and param.substr(1_byte) == name)
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return true;
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if (param == "--")
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break;
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}
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return false;
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}
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const String& ParametersParser::option_value(const String& name) const
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{
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auto it = m_options.find(name);
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assert(it != m_options.end());
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assert(it->second == true);
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for (size_t i = 0; i < m_params.size(); ++i)
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{
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if (m_params[i][0] == '-' and m_params[i].substr(1_byte) == name)
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return m_params[i+1];
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if (m_params[i] == "--")
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break;
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}
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static String empty;
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return empty;
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}
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size_t ParametersParser::positional_count() const
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{
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size_t res = 0;
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for (bool positional : m_positional)
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{
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if (positional)
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++res;
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}
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return res;
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}
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const String& ParametersParser::operator[] (size_t index) const
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{
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assert(index < positional_count());
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iterator it = begin();
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while (index)
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{
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++it;
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--index;
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}
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return *it;
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}
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ParametersParser::iterator ParametersParser::begin() const
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{
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int index = 0;
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while (index < m_positional.size() and not m_positional[index])
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++index;
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return iterator(*this, index);
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}
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ParametersParser::iterator ParametersParser::end() const
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{
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return iterator(*this, m_params.size());
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}
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}
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