mirror of
https://github.com/nlohmann/json.git
synced 2024-12-15 06:29:00 +08:00
1312 lines
25 KiB
C++
1312 lines
25 KiB
C++
/*
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Copyright (c) 2014 Jarryd Beck
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef CXX_OPTS_HPP
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#define CXX_OPTS_HPP
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#if defined(__GNUC__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
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#endif
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#include <exception>
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#include <iostream>
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#include <map>
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#include <memory>
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#include <regex>
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#include <sstream>
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#include <string>
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#include <vector>
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//when we ask cxxopts to use Unicode, help strings are processed using ICU,
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//which results in the correct lengths being computed for strings when they
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//are formatted for the help output
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//it is necessary to make sure that <unicode/unistr.h> can be found by the
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//compiler, and that icu-uc is linked in to the binary.
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#ifdef CXXOPTS_USE_UNICODE
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#include <unicode/unistr.h>
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namespace cxxopts
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{
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typedef icu::UnicodeString String;
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inline
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String
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toLocalString(std::string s)
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{
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return icu::UnicodeString::fromUTF8(s);
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}
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class UnicodeStringIterator : public
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std::iterator<std::forward_iterator_tag, int32_t>
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{
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public:
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UnicodeStringIterator(const icu::UnicodeString* s, int32_t pos)
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: s(s)
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, i(pos)
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{
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}
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value_type
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operator*() const
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{
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return s->char32At(i);
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}
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bool
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operator==(const UnicodeStringIterator& rhs) const
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{
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return s == rhs.s && i == rhs.i;
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}
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bool
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operator!=(const UnicodeStringIterator& rhs) const
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{
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return !(*this == rhs);
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}
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UnicodeStringIterator&
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operator++()
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{
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++i;
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return *this;
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}
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UnicodeStringIterator
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operator+(int32_t v)
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{
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return UnicodeStringIterator(s, i + v);
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}
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private:
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const icu::UnicodeString* s;
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int32_t i;
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};
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inline
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String&
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stringAppend(String&s, String a)
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{
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return s.append(std::move(a));
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}
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inline
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String&
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stringAppend(String& s, int n, UChar32 c)
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{
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for (int i = 0; i != n; ++i)
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{
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s.append(c);
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}
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return s;
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}
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template <typename Iterator>
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String&
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stringAppend(String& s, Iterator begin, Iterator end)
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{
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while (begin != end)
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{
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s.append(*begin);
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++begin;
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}
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return s;
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}
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inline
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size_t
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stringLength(const String& s)
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{
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return s.length();
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}
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inline
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std::string
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toUTF8String(const String& s)
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{
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std::string result;
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s.toUTF8String(result);
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return result;
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}
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}
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namespace std
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{
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cxxopts::UnicodeStringIterator
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begin(const icu::UnicodeString& s)
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{
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return cxxopts::UnicodeStringIterator(&s, 0);
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}
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cxxopts::UnicodeStringIterator
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end(const icu::UnicodeString& s)
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{
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return cxxopts::UnicodeStringIterator(&s, s.length());
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}
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}
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//ifdef CXXOPTS_USE_UNICODE
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#else
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namespace cxxopts
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{
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typedef std::string String;
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template <typename T>
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T
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toLocalString(T&& t)
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{
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return t;
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}
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inline
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size_t
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stringLength(const String& s)
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{
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return s.length();
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}
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inline
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String&
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stringAppend(String&s, String a)
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{
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return s.append(std::move(a));
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}
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inline
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String&
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stringAppend(String& s, size_t n, char c)
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{
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return s.append(n, c);
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}
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template <typename Iterator>
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String&
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stringAppend(String& s, Iterator begin, Iterator end)
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{
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return s.append(begin, end);
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}
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template <typename T>
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std::string
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toUTF8String(T&& t)
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{
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return std::forward<T>(t);
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}
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}
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//ifdef CXXOPTS_USE_UNICODE
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#endif
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namespace cxxopts
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{
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class Value : public std::enable_shared_from_this<Value>
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{
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public:
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virtual void
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parse(const std::string& text) const = 0;
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virtual void
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parse() const = 0;
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virtual bool
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has_arg() const = 0;
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virtual bool
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has_default() const = 0;
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virtual bool
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has_implicit() const = 0;
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virtual std::string
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get_default_value() const = 0;
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virtual std::string
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get_implicit_value() const = 0;
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virtual std::shared_ptr<Value>
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default_value(const std::string& value) = 0;
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virtual std::shared_ptr<Value>
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implicit_value(const std::string& value) = 0;
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};
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class OptionException : public std::exception
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{
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public:
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OptionException(const std::string& message)
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: m_message(message)
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{
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}
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virtual const char*
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what() const noexcept
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{
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return m_message.c_str();
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}
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private:
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std::string m_message;
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};
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class OptionSpecException : public OptionException
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{
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public:
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OptionSpecException(const std::string& message)
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: OptionException(message)
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{
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}
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};
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class OptionParseException : public OptionException
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{
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public:
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OptionParseException(const std::string& message)
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: OptionException(message)
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{
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}
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};
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class option_exists_error : public OptionSpecException
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{
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public:
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option_exists_error(const std::string& option)
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: OptionSpecException(u8"Option ‘" + option + u8"’ already exists")
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{
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}
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};
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class invalid_option_format_error : public OptionSpecException
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{
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public:
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invalid_option_format_error(const std::string& format)
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: OptionSpecException(u8"Invalid option format ‘" + format + u8"’")
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{
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}
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};
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class option_not_exists_exception : public OptionParseException
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{
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public:
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option_not_exists_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ does not exist")
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{
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}
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};
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class missing_argument_exception : public OptionParseException
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{
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public:
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missing_argument_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ is missing an argument")
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{
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}
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};
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class option_requires_argument_exception : public OptionParseException
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{
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public:
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option_requires_argument_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ requires an argument")
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{
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}
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};
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class option_not_has_argument_exception : public OptionParseException
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{
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public:
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option_not_has_argument_exception
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(
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const std::string& option,
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const std::string& arg
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)
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: OptionParseException(
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u8"Option ‘" + option + u8"’ does not take an argument, but argument‘"
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+ arg + "’ given")
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{
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}
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};
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class option_not_present_exception : public OptionParseException
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{
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public:
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option_not_present_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ not present")
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{
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}
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};
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class argument_incorrect_type : public OptionParseException
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{
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public:
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argument_incorrect_type
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(
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const std::string& arg
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)
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: OptionParseException(
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u8"Argument ‘" + arg + u8"’ failed to parse"
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)
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{
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}
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};
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namespace values
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{
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template <typename T>
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void
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parse_value(const std::string& text, T& value)
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{
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std::istringstream is(text);
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if (!(is >> value))
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{
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std::cerr << "cannot parse empty value" << std::endl;
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throw argument_incorrect_type(text);
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}
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if (is.rdbuf()->in_avail() != 0)
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{
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throw argument_incorrect_type(text);
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}
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}
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template <typename T>
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void
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parse_value(const std::string& text, std::vector<T>& value)
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{
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T v;
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parse_value(text, v);
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value.push_back(v);
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}
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inline
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void
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parse_value(const std::string& /*text*/, bool& value)
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{
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//TODO recognise on, off, yes, no, enable, disable
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//so that we can write --long=yes explicitly
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value = true;
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}
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inline
|
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void
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parse_value(const std::string& text, std::string& value)
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{
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value = text;
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}
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template <typename T>
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struct value_has_arg
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{
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static constexpr bool value = true;
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};
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|
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template <>
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||
struct value_has_arg<bool>
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{
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static constexpr bool value = false;
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||
};
|
||
|
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template <typename T>
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class standard_value : public Value
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{
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public:
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standard_value()
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: m_result(std::make_shared<T>())
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, m_store(m_result.get())
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{
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||
}
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standard_value(T* t)
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: m_store(t)
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{
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||
}
|
||
|
||
void
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||
parse(const std::string& text) const
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||
{
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||
if (m_implicit && text.empty())
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||
{
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parse_value(m_implicit_value, *m_store);
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||
}
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||
else
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||
{
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||
parse_value(text, *m_store);
|
||
}
|
||
}
|
||
|
||
void
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||
parse() const
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||
{
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parse_value(m_default_value, *m_store);
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||
}
|
||
|
||
bool
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||
has_arg() const
|
||
{
|
||
return value_has_arg<T>::value;
|
||
}
|
||
|
||
bool
|
||
has_default() const
|
||
{
|
||
return m_default;
|
||
}
|
||
|
||
bool
|
||
has_implicit() const
|
||
{
|
||
return m_implicit;
|
||
}
|
||
|
||
virtual std::shared_ptr<Value>
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||
default_value(const std::string& value){
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||
m_default = true;
|
||
m_default_value = value;
|
||
return shared_from_this();
|
||
}
|
||
|
||
virtual std::shared_ptr<Value>
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||
implicit_value(const std::string& value){
|
||
m_implicit = true;
|
||
m_implicit_value = value;
|
||
return shared_from_this();
|
||
}
|
||
|
||
std::string
|
||
get_default_value() const
|
||
{
|
||
return m_default_value;
|
||
}
|
||
|
||
std::string
|
||
get_implicit_value() const
|
||
{
|
||
return m_implicit_value;
|
||
}
|
||
|
||
const T&
|
||
get() const
|
||
{
|
||
if (m_store == nullptr)
|
||
{
|
||
return *m_result;
|
||
}
|
||
else
|
||
{
|
||
return *m_store;
|
||
}
|
||
}
|
||
|
||
protected:
|
||
std::shared_ptr<T> m_result;
|
||
T* m_store;
|
||
bool m_default = false;
|
||
std::string m_default_value;
|
||
bool m_implicit = false;
|
||
std::string m_implicit_value;
|
||
};
|
||
}
|
||
|
||
template <typename T>
|
||
std::shared_ptr<Value>
|
||
value()
|
||
{
|
||
return std::make_shared<values::standard_value<T>>();
|
||
}
|
||
|
||
template <typename T>
|
||
std::shared_ptr<Value>
|
||
value(T& t)
|
||
{
|
||
return std::make_shared<values::standard_value<T>>(&t);
|
||
}
|
||
|
||
class OptionAdder;
|
||
|
||
class OptionDetails
|
||
{
|
||
public:
|
||
OptionDetails
|
||
(
|
||
const String& description,
|
||
std::shared_ptr<const Value> value
|
||
)
|
||
: m_desc(description)
|
||
, m_value(value)
|
||
, m_count(0)
|
||
{
|
||
}
|
||
|
||
const String&
|
||
description() const
|
||
{
|
||
return m_desc;
|
||
}
|
||
|
||
bool
|
||
has_arg() const
|
||
{
|
||
return m_value->has_arg();
|
||
}
|
||
|
||
void
|
||
parse(const std::string& text)
|
||
{
|
||
m_value->parse(text);
|
||
++m_count;
|
||
}
|
||
|
||
void
|
||
parse_default()
|
||
{
|
||
m_value->parse();
|
||
++m_count;
|
||
}
|
||
|
||
int
|
||
count() const
|
||
{
|
||
return m_count;
|
||
}
|
||
|
||
const Value& value() const {
|
||
return *m_value;
|
||
}
|
||
|
||
template <typename T>
|
||
const T&
|
||
as() const
|
||
{
|
||
#ifdef CXXOPTS_NO_RTTI
|
||
return static_cast<const values::standard_value<T>&>(*m_value).get();
|
||
#else
|
||
return dynamic_cast<const values::standard_value<T>&>(*m_value).get();
|
||
#endif
|
||
}
|
||
|
||
private:
|
||
String m_desc;
|
||
std::shared_ptr<const Value> m_value;
|
||
int m_count;
|
||
};
|
||
|
||
struct HelpOptionDetails
|
||
{
|
||
std::string s;
|
||
std::string l;
|
||
String desc;
|
||
bool has_arg;
|
||
bool has_default;
|
||
std::string default_value;
|
||
bool has_implicit;
|
||
std::string implicit_value;
|
||
std::string arg_help;
|
||
};
|
||
|
||
struct HelpGroupDetails
|
||
{
|
||
std::string name;
|
||
std::string description;
|
||
std::vector<HelpOptionDetails> options;
|
||
};
|
||
|
||
class Options
|
||
{
|
||
public:
|
||
|
||
Options(std::string program, std::string help_string = "")
|
||
: m_program(std::move(program))
|
||
, m_help_string(toLocalString(std::move(help_string)))
|
||
{
|
||
}
|
||
|
||
inline
|
||
void
|
||
parse(int& argc, char**& argv);
|
||
|
||
inline
|
||
OptionAdder
|
||
add_options(std::string group = "");
|
||
|
||
inline
|
||
void
|
||
add_option
|
||
(
|
||
const std::string& group,
|
||
const std::string& s,
|
||
const std::string& l,
|
||
std::string desc,
|
||
std::shared_ptr<const Value> value,
|
||
std::string arg_help
|
||
);
|
||
|
||
int
|
||
count(const std::string& o) const
|
||
{
|
||
auto iter = m_options.find(o);
|
||
if (iter == m_options.end())
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
return iter->second->count();
|
||
}
|
||
|
||
const OptionDetails&
|
||
operator[](const std::string& option) const
|
||
{
|
||
auto iter = m_options.find(option);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_present_exception(option);
|
||
}
|
||
|
||
return *iter->second;
|
||
}
|
||
|
||
//parse positional arguments into the given option
|
||
inline
|
||
void
|
||
parse_positional(std::string option);
|
||
|
||
inline
|
||
std::string
|
||
help(const std::vector<std::string>& groups = {""}) const;
|
||
|
||
inline
|
||
const std::vector<std::string>
|
||
groups() const;
|
||
|
||
inline
|
||
const HelpGroupDetails&
|
||
group_help(const std::string& group) const;
|
||
|
||
private:
|
||
|
||
inline
|
||
void
|
||
add_one_option
|
||
(
|
||
const std::string& option,
|
||
std::shared_ptr<OptionDetails> details
|
||
);
|
||
|
||
inline
|
||
bool
|
||
consume_positional(std::string a);
|
||
|
||
inline
|
||
void
|
||
add_to_option(const std::string& option, const std::string& arg);
|
||
|
||
inline
|
||
void
|
||
parse_option
|
||
(
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& name,
|
||
const std::string& arg = ""
|
||
);
|
||
|
||
inline
|
||
void
|
||
checked_parse_arg
|
||
(
|
||
int argc,
|
||
char* argv[],
|
||
int& current,
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& name
|
||
);
|
||
|
||
inline
|
||
String
|
||
help_one_group(const std::string& group) const;
|
||
|
||
std::string m_program;
|
||
String m_help_string;
|
||
|
||
std::map<std::string, std::shared_ptr<OptionDetails>> m_options;
|
||
std::string m_positional;
|
||
|
||
//mapping from groups to help options
|
||
std::map<std::string, HelpGroupDetails> m_help;
|
||
};
|
||
|
||
class OptionAdder
|
||
{
|
||
public:
|
||
|
||
OptionAdder(Options& options, std::string group)
|
||
: m_options(options), m_group(std::move(group))
|
||
{
|
||
}
|
||
|
||
inline
|
||
OptionAdder&
|
||
operator()
|
||
(
|
||
const std::string& opts,
|
||
const std::string& desc,
|
||
std::shared_ptr<const Value> value
|
||
= ::cxxopts::value<bool>(),
|
||
std::string arg_help = ""
|
||
);
|
||
|
||
private:
|
||
Options& m_options;
|
||
std::string m_group;
|
||
};
|
||
|
||
}
|
||
|
||
namespace cxxopts
|
||
{
|
||
|
||
namespace
|
||
{
|
||
|
||
constexpr int OPTION_LONGEST = 30;
|
||
constexpr int OPTION_DESC_GAP = 2;
|
||
|
||
std::basic_regex<char> option_matcher
|
||
("--([[:alnum:]][-_[:alnum:]]+)(=(.*))?|-([a-zA-Z]+)");
|
||
|
||
std::basic_regex<char> option_specifier
|
||
("(([a-zA-Z]),)?([a-zA-Z0-9][-_a-zA-Z0-9]+)");
|
||
|
||
String
|
||
format_option
|
||
(
|
||
const HelpOptionDetails& o
|
||
)
|
||
{
|
||
auto& s = o.s;
|
||
auto& l = o.l;
|
||
|
||
String result = " ";
|
||
|
||
if (s.size() > 0)
|
||
{
|
||
result += "-" + toLocalString(s) + ",";
|
||
}
|
||
else
|
||
{
|
||
result += " ";
|
||
}
|
||
|
||
if (l.size() > 0)
|
||
{
|
||
result += " --" + toLocalString(l);
|
||
}
|
||
|
||
if (o.has_arg)
|
||
{
|
||
auto arg = o.arg_help.size() > 0 ? toLocalString(o.arg_help) : "arg";
|
||
|
||
if (o.has_implicit)
|
||
{
|
||
result += " [=" + arg + "(=" + toLocalString(o.implicit_value) + ")]";
|
||
}
|
||
else
|
||
{
|
||
result += " " + arg;
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
String
|
||
format_description
|
||
(
|
||
const HelpOptionDetails& o,
|
||
size_t start,
|
||
size_t width
|
||
)
|
||
{
|
||
auto desc = o.desc;
|
||
|
||
if (o.has_default)
|
||
{
|
||
desc += toLocalString(" (default:" + o.default_value + ")");
|
||
}
|
||
|
||
String result;
|
||
|
||
auto current = std::begin(desc);
|
||
auto startLine = current;
|
||
auto lastSpace = current;
|
||
|
||
auto size = size_t{};
|
||
|
||
while (current != std::end(desc))
|
||
{
|
||
if (*current == ' ')
|
||
{
|
||
lastSpace = current;
|
||
}
|
||
|
||
if (size > width)
|
||
{
|
||
if (lastSpace == startLine)
|
||
{
|
||
stringAppend(result, startLine, current + 1);
|
||
stringAppend(result, "\n");
|
||
stringAppend(result, start, ' ');
|
||
startLine = current + 1;
|
||
lastSpace = startLine;
|
||
}
|
||
else
|
||
{
|
||
stringAppend(result, startLine, lastSpace);
|
||
stringAppend(result, "\n");
|
||
stringAppend(result, start, ' ');
|
||
startLine = lastSpace + 1;
|
||
}
|
||
size = 0;
|
||
}
|
||
else
|
||
{
|
||
++size;
|
||
}
|
||
|
||
++current;
|
||
}
|
||
|
||
//append whatever is left
|
||
stringAppend(result, startLine, current);
|
||
|
||
return result;
|
||
}
|
||
}
|
||
|
||
OptionAdder
|
||
Options::add_options(std::string group)
|
||
{
|
||
return OptionAdder(*this, std::move(group));
|
||
}
|
||
|
||
OptionAdder&
|
||
OptionAdder::operator()
|
||
(
|
||
const std::string& opts,
|
||
const std::string& desc,
|
||
std::shared_ptr<const Value> value,
|
||
std::string arg_help
|
||
)
|
||
{
|
||
std::match_results<const char*> result;
|
||
std::regex_match(opts.c_str(), result, option_specifier);
|
||
|
||
if (result.empty())
|
||
{
|
||
throw invalid_option_format_error(opts);
|
||
}
|
||
|
||
const auto& s = result[2];
|
||
const auto& l = result[3];
|
||
|
||
m_options.add_option(m_group, s.str(), l.str(), desc, value,
|
||
std::move(arg_help));
|
||
|
||
return *this;
|
||
}
|
||
|
||
void
|
||
Options::parse_option
|
||
(
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& /*name*/,
|
||
const std::string& arg
|
||
)
|
||
{
|
||
value->parse(arg);
|
||
}
|
||
|
||
void
|
||
Options::checked_parse_arg
|
||
(
|
||
int argc,
|
||
char* argv[],
|
||
int& current,
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& name
|
||
)
|
||
{
|
||
if (current + 1 >= argc)
|
||
{
|
||
if (value->value().has_implicit())
|
||
{
|
||
parse_option(value, name, "");
|
||
}
|
||
else
|
||
{
|
||
throw missing_argument_exception(name);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (argv[current + 1][0] == '-' && value->value().has_implicit())
|
||
{
|
||
parse_option(value, name, "");
|
||
}
|
||
else
|
||
{
|
||
parse_option(value, name, argv[current + 1]);
|
||
++current;
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
Options::add_to_option(const std::string& option, const std::string& arg)
|
||
{
|
||
auto iter = m_options.find(option);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_exists_exception(option);
|
||
}
|
||
|
||
parse_option(iter->second, option, arg);
|
||
}
|
||
|
||
bool
|
||
Options::consume_positional(std::string a)
|
||
{
|
||
if (m_positional.size() > 0)
|
||
{
|
||
add_to_option(m_positional, a);
|
||
return true;
|
||
}
|
||
else
|
||
{
|
||
return false;
|
||
}
|
||
}
|
||
|
||
void
|
||
Options::parse_positional(std::string option)
|
||
{
|
||
m_positional = std::move(option);
|
||
}
|
||
|
||
void
|
||
Options::parse(int& argc, char**& argv)
|
||
{
|
||
int current = 1;
|
||
|
||
int nextKeep = 1;
|
||
|
||
while (current != argc)
|
||
{
|
||
std::match_results<const char*> result;
|
||
std::regex_match(argv[current], result, option_matcher);
|
||
|
||
if (result.empty())
|
||
{
|
||
//not a flag
|
||
|
||
//if true is returned here then it was consumed, otherwise it is
|
||
//ignored
|
||
if (consume_positional(argv[current]))
|
||
{
|
||
}
|
||
else
|
||
{
|
||
argv[nextKeep] = argv[current];
|
||
++nextKeep;
|
||
}
|
||
//if we return from here then it was parsed successfully, so continue
|
||
}
|
||
else
|
||
{
|
||
//short or long option?
|
||
if (result[4].length() != 0)
|
||
{
|
||
const std::string& s = result[4];
|
||
|
||
for (std::size_t i = 0; i != s.size(); ++i)
|
||
{
|
||
std::string name(1, s[i]);
|
||
auto iter = m_options.find(name);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_exists_exception(name);
|
||
}
|
||
|
||
auto value = iter->second;
|
||
|
||
//if no argument then just add it
|
||
if (!value->has_arg())
|
||
{
|
||
parse_option(value, name);
|
||
}
|
||
else
|
||
{
|
||
//it must be the last argument
|
||
if (i + 1 == s.size())
|
||
{
|
||
checked_parse_arg(argc, argv, current, value, name);
|
||
}
|
||
else if (value->value().has_implicit())
|
||
{
|
||
parse_option(value, name, "");
|
||
}
|
||
else
|
||
{
|
||
//error
|
||
throw option_requires_argument_exception(name);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else if (result[1].length() != 0)
|
||
{
|
||
const std::string& name = result[1];
|
||
|
||
auto iter = m_options.find(name);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_exists_exception(name);
|
||
}
|
||
|
||
auto opt = iter->second;
|
||
|
||
//equals provided for long option?
|
||
if (result[3].length() != 0)
|
||
{
|
||
//parse the option given
|
||
|
||
//but if it doesn't take an argument, this is an error
|
||
if (!opt->has_arg())
|
||
{
|
||
throw option_not_has_argument_exception(name, result[3]);
|
||
}
|
||
|
||
parse_option(opt, name, result[3]);
|
||
}
|
||
else
|
||
{
|
||
if (opt->has_arg())
|
||
{
|
||
//parse the next argument
|
||
checked_parse_arg(argc, argv, current, opt, name);
|
||
}
|
||
else
|
||
{
|
||
//parse with empty argument
|
||
parse_option(opt, name);
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
++current;
|
||
}
|
||
|
||
for (auto& opt : m_options)
|
||
{
|
||
auto& detail = opt.second;
|
||
auto& value = detail->value();
|
||
|
||
if(!detail->count() && value.has_default()){
|
||
detail->parse_default();
|
||
}
|
||
}
|
||
|
||
argc = nextKeep;
|
||
}
|
||
|
||
void
|
||
Options::add_option
|
||
(
|
||
const std::string& group,
|
||
const std::string& s,
|
||
const std::string& l,
|
||
std::string desc,
|
||
std::shared_ptr<const Value> value,
|
||
std::string arg_help
|
||
)
|
||
{
|
||
auto stringDesc = toLocalString(std::move(desc));
|
||
auto option = std::make_shared<OptionDetails>(stringDesc, value);
|
||
|
||
if (s.size() > 0)
|
||
{
|
||
add_one_option(s, option);
|
||
}
|
||
|
||
if (l.size() > 0)
|
||
{
|
||
add_one_option(l, option);
|
||
}
|
||
|
||
//add the help details
|
||
auto& options = m_help[group];
|
||
|
||
options.options.emplace_back(HelpOptionDetails{s, l, stringDesc,
|
||
value->has_arg(),
|
||
value->has_default(), value->get_default_value(),
|
||
value->has_implicit(), value->get_implicit_value(),
|
||
std::move(arg_help)});
|
||
}
|
||
|
||
void
|
||
Options::add_one_option
|
||
(
|
||
const std::string& option,
|
||
std::shared_ptr<OptionDetails> details
|
||
)
|
||
{
|
||
auto in = m_options.emplace(option, details);
|
||
|
||
if (!in.second)
|
||
{
|
||
throw option_exists_error(option);
|
||
}
|
||
}
|
||
|
||
String
|
||
Options::help_one_group(const std::string& g) const
|
||
{
|
||
typedef std::vector<std::pair<String, String>> OptionHelp;
|
||
|
||
auto group = m_help.find(g);
|
||
if (group == m_help.end())
|
||
{
|
||
return "";
|
||
}
|
||
|
||
OptionHelp format;
|
||
|
||
size_t longest = 0;
|
||
|
||
String result;
|
||
|
||
if (!g.empty())
|
||
{
|
||
result += toLocalString(" " + g + " options:\n\n");
|
||
}
|
||
|
||
for (const auto& o : group->second.options)
|
||
{
|
||
auto s = format_option(o);
|
||
longest = std::max(longest, stringLength(s));
|
||
format.push_back(std::make_pair(s, String()));
|
||
}
|
||
|
||
longest = std::min(longest, static_cast<size_t>(OPTION_LONGEST));
|
||
|
||
//widest allowed description
|
||
auto allowed = size_t{76} - longest - OPTION_DESC_GAP;
|
||
|
||
auto fiter = format.begin();
|
||
for (const auto& o : group->second.options)
|
||
{
|
||
auto d = format_description(o, longest + OPTION_DESC_GAP, allowed);
|
||
|
||
result += fiter->first;
|
||
if (stringLength(fiter->first) > longest)
|
||
{
|
||
result += "\n";
|
||
result += toLocalString(std::string(longest + OPTION_DESC_GAP, ' '));
|
||
}
|
||
else
|
||
{
|
||
result += toLocalString(std::string(longest + OPTION_DESC_GAP -
|
||
stringLength(fiter->first),
|
||
' '));
|
||
}
|
||
result += d;
|
||
result += "\n";
|
||
|
||
++fiter;
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
std::string
|
||
Options::help(const std::vector<std::string>& groups) const
|
||
{
|
||
String result = "Usage:\n " + toLocalString(m_program) + " [OPTION...]"
|
||
+ m_help_string + "\n\n";
|
||
|
||
for (std::size_t i = 0; i < groups.size(); ++i)
|
||
{
|
||
result += help_one_group(groups[i]);
|
||
if (i < groups.size() - 1)
|
||
{
|
||
result += "\n";
|
||
}
|
||
}
|
||
|
||
return toUTF8String(result);
|
||
}
|
||
|
||
const std::vector<std::string>
|
||
Options::groups() const
|
||
{
|
||
std::vector<std::string> g;
|
||
|
||
std::transform(
|
||
m_help.begin(),
|
||
m_help.end(),
|
||
std::back_inserter(g),
|
||
[] (const std::map<std::string, HelpGroupDetails>::value_type& pair)
|
||
{
|
||
return pair.first;
|
||
}
|
||
);
|
||
|
||
return g;
|
||
}
|
||
|
||
const HelpGroupDetails&
|
||
Options::group_help(const std::string& group) const
|
||
{
|
||
return m_help.at(group);
|
||
}
|
||
|
||
}
|
||
|
||
#if defined(__GNU__)
|
||
#pragma GCC diagnostic pop
|
||
#endif
|
||
|
||
#endif //CXX_OPTS_HPP
|